htdocs: update to hterm-1.84
diff --git a/htdocs/dist/1.84/hterm_all.js b/htdocs/dist/1.84/hterm_all.js
new file mode 100644
index 0000000..be34502
--- /dev/null
+++ b/htdocs/dist/1.84/hterm_all.js
@@ -0,0 +1,20201 @@
+// This file was generated by libdot/bin/concat.sh.
+// It has been marked read-only for your safety. Rather than
+// edit it directly, please modify one of these source files.
+//
+// libdot/js/lib.js
+// libdot/js/lib_polyfill.js
+// libdot/js/lib_array.js
+// libdot/js/lib_codec.js
+// libdot/js/lib_colors.js
+// libdot/js/lib_f.js
+// libdot/js/lib_i18n.js
+// libdot/js/lib_message_manager.js
+// libdot/js/lib_preference_manager.js
+// libdot/js/lib_resource.js
+// libdot/js/lib_storage.js
+// libdot/js/lib_storage_chrome.js
+// libdot/js/lib_storage_local.js
+// libdot/js/lib_storage_memory.js
+// libdot/js/lib_utf8.js
+// libdot/third_party/wcwidth/lib_wc.js
+
+'use strict';
+
+// SOURCE FILE: libdot/js/lib.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+if (typeof lib != 'undefined')
+ throw new Error('Global "lib" object already exists.');
+
+var lib = {};
+
+/**
+ * Map of "dependency" to ["source", ...].
+ *
+ * Each dependency is a object name, like "lib.fs", "source" is the url that
+ * depends on the object.
+ */
+lib.runtimeDependencies_ = {};
+
+/**
+ * List of functions that need to be invoked during library initialization.
+ *
+ * Each element in the initCallbacks_ array is itself a two-element array.
+ * Element 0 is a short string describing the owner of the init routine, useful
+ * for debugging. Element 1 is the callback function.
+ */
+lib.initCallbacks_ = [];
+
+/**
+ * Records a runtime dependency.
+ *
+ * This can be useful when you want to express a run-time dependency at
+ * compile time. It is not intended to be a full-fledged library system or
+ * dependency tracker. It's just there to make it possible to debug the
+ * deps without running all the code.
+ *
+ * Object names are specified as strings. For example...
+ *
+ * lib.rtdep('lib.colors', 'lib.PreferenceManager');
+ *
+ * Object names need not be rooted by 'lib'. You may use this to declare a
+ * dependency on any object.
+ *
+ * The client program may call lib.ensureRuntimeDependencies() at startup in
+ * order to ensure that all runtime dependencies have been met.
+ *
+ * @param {string} var_args One or more objects specified as strings.
+ */
+lib.rtdep = function(var_args) {
+ var source;
+
+ try {
+ throw new Error();
+ } catch (ex) {
+ var stackArray = ex.stack.split('\n');
+ // In Safari, the resulting stackArray will only have 2 elements and the
+ // individual strings are formatted differently.
+ if (stackArray.length >= 3) {
+ source = stackArray[2].replace(/^\s*at\s+/, '');
+ } else {
+ source = stackArray[1].replace(/^\s*global code@/, '');
+ }
+ }
+
+ for (var i = 0; i < arguments.length; i++) {
+ var path = arguments[i];
+ if (path instanceof Array) {
+ lib.rtdep.apply(lib, path);
+ } else {
+ var ary = this.runtimeDependencies_[path];
+ if (!ary)
+ ary = this.runtimeDependencies_[path] = [];
+ ary.push(source);
+ }
+ }
+};
+
+/**
+ * Ensures that all runtime dependencies are met, or an exception is thrown.
+ *
+ * Every unmet runtime dependency will be logged to the JS console. If at
+ * least one dependency is unmet this will raise an exception.
+ */
+lib.ensureRuntimeDependencies_ = function() {
+ var passed = true;
+
+ for (var path in lib.runtimeDependencies_) {
+ var sourceList = lib.runtimeDependencies_[path];
+ var names = path.split('.');
+
+ // In a document context 'window' is the global object. In a worker it's
+ // called 'self'.
+ var obj = (window || self);
+ for (var i = 0; i < names.length; i++) {
+ if (!(names[i] in obj)) {
+ console.warn('Missing "' + path + '" is needed by', sourceList);
+ passed = false;
+ break;
+ }
+
+ obj = obj[names[i]];
+ }
+ }
+
+ if (!passed)
+ throw new Error('Failed runtime dependency check');
+};
+
+/**
+ * Register an initialization function.
+ *
+ * The initialization functions are invoked in registration order when
+ * lib.init() is invoked. Each function will receive a single parameter, which
+ * is a function to be invoked when it completes its part of the initialization.
+ *
+ * @param {string} name A short descriptive name of the init routine useful for
+ * debugging.
+ * @param {function(function)} callback The initialization function to register.
+ * @return {function} The callback parameter.
+ */
+lib.registerInit = function(name, callback) {
+ lib.initCallbacks_.push([name, callback]);
+ return callback;
+};
+
+/**
+ * Initialize the library.
+ *
+ * This will ensure that all registered runtime dependencies are met, and
+ * invoke any registered initialization functions.
+ *
+ * Initialization is asynchronous. The library is not ready for use until
+ * the onInit function is invoked.
+ *
+ * @param {function()} onInit The function to invoke when initialization is
+ * complete.
+ * @param {function(*)} opt_logFunction An optional function to send
+ * initialization related log messages to.
+ */
+lib.init = function(onInit, opt_logFunction) {
+ var ary = lib.initCallbacks_;
+
+ var initNext = function() {
+ if (ary.length) {
+ var rec = ary.shift();
+ if (opt_logFunction)
+ opt_logFunction('init: ' + rec[0]);
+ rec[1](lib.f.alarm(initNext));
+ } else {
+ onInit();
+ }
+ };
+
+ if (typeof onInit != 'function')
+ throw new Error('Missing or invalid argument: onInit');
+
+ lib.ensureRuntimeDependencies_();
+
+ setTimeout(initNext, 0);
+};
+// SOURCE FILE: libdot/js/lib_polyfill.js
+// Copyright 2017 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @fileoverview Polyfills for ES2016+ features we want to use.
+ */
+
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/padStart
+if (!String.prototype.padStart) {
+ String.prototype.padStart = function(targetLength, padString) {
+ // If the string is already long enough, nothing to do!
+ targetLength -= this.length;
+ if (targetLength <= 0)
+ return String(this);
+
+ if (padString === undefined)
+ padString = ' ';
+
+ // In case the pad is multiple chars long.
+ if (targetLength > padString.length)
+ padString = padString.repeat((targetLength / padString.length) + 1);
+
+ return padString.slice(0, targetLength) + String(this);
+ };
+}
+
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/padEnd
+if (!String.prototype.padEnd) {
+ String.prototype.padEnd = function(targetLength, padString) {
+ // If the string is already long enough, nothing to do!
+ targetLength -= this.length;
+ if (targetLength <= 0)
+ return String(this);
+
+ if (padString === undefined)
+ padString = ' ';
+
+ // In case the pad is multiple chars long.
+ if (targetLength > padString.length)
+ padString = padString.repeat((targetLength / padString.length) + 1);
+
+ return String(this) + padString.slice(0, targetLength);
+ };
+}
+
+// https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_objects/Object/values
+// https://github.com/tc39/proposal-object-values-entries/blob/master/polyfill.js
+if (!Object.values || !Object.entries) {
+ const reduce = Function.bind.call(Function.call, Array.prototype.reduce);
+ const isEnumerable = Function.bind.call(Function.call,
+ Object.prototype.propertyIsEnumerable);
+ const concat = Function.bind.call(Function.call, Array.prototype.concat);
+
+ if (!Object.values) {
+ Object.values = function values(O) {
+ return reduce(Reflect.ownKeys(O), (v, k) => concat(v,
+ typeof k === 'string' && isEnumerable(O, k) ? [O[k]] : []), []);
+ };
+ }
+
+ if (!Object.entries) {
+ Object.entries = function entries(O) {
+ return reduce(Reflect.ownKeys(O), (e, k) => concat(e,
+ typeof k === 'string' && isEnumerable(O, k) ? [[k, O[k]]] : []), []);
+ };
+ }
+}
+
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/finally
+// https://github.com/tc39/proposal-promise-finally/blob/master/polyfill.js
+if (typeof Promise.prototype.finally !== 'function') {
+ const speciesConstructor = function(O, defaultConstructor) {
+ if (!O || (typeof O !== 'object' && typeof O !== 'function')) {
+ throw new TypeError('Assertion failed: Type(O) is not Object');
+ }
+ const C = O.constructor;
+ if (typeof C === 'undefined') {
+ return defaultConstructor;
+ }
+ if (!C || (typeof C !== 'object' && typeof C !== 'function')) {
+ throw new TypeError('O.constructor is not an Object');
+ }
+ const S =
+ typeof Symbol === 'function' && typeof Symbol.species === 'symbol' ?
+ C[Symbol.species] : undefined;
+ if (S == null) {
+ return defaultConstructor;
+ }
+ if (typeof S === 'function' && S.prototype) {
+ return S;
+ }
+ throw new TypeError('no constructor found');
+ };
+
+ const shim = {
+ finally(onFinally) {
+ const promise = this;
+ if (typeof promise !== 'object' || promise === null) {
+ throw new TypeError('"this" value is not an Object');
+ }
+ const C = speciesConstructor(promise, Promise);
+ if (typeof onFinally !== 'function') {
+ return Promise.prototype.then.call(promise, onFinally, onFinally);
+ }
+ return Promise.prototype.then.call(
+ promise,
+ x => new C(resolve => resolve(onFinally())).then(() => x),
+ e => new C(resolve => resolve(onFinally())).then(() => { throw e; })
+ );
+ }
+ };
+ Object.defineProperty(Promise.prototype, 'finally', {
+ configurable: true, writable: true, value: shim.finally,
+ });
+}
+// SOURCE FILE: libdot/js/lib_array.js
+// Copyright 2017 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @fileoverview Helper functions for (typed) arrays.
+ */
+
+lib.array = {};
+
+/**
+ * Convert an array of four unsigned bytes into an unsigned 32-bit integer (big
+ * endian).
+ *
+ * @param {!Array.<!number>} array
+ * @returns {!number}
+ */
+lib.array.arrayBigEndianToUint32 = function(array) {
+ const maybeSigned =
+ (array[0] << 24) | (array[1] << 16) | (array[2] << 8) | (array[3] << 0);
+ // Interpret the result of the bit operations as an unsigned integer.
+ return maybeSigned >>> 0;
+};
+
+/**
+ * Convert an unsigned 32-bit integer into an array of four unsigned bytes (big
+ * endian).
+ *
+ * @param {!number} uint32
+ * @returns {!Array.<!number>}
+ */
+lib.array.uint32ToArrayBigEndian = function(uint32) {
+ return [
+ (uint32 >>> 24) & 0xFF,
+ (uint32 >>> 16) & 0xFF,
+ (uint32 >>> 8) & 0xFF,
+ (uint32 >>> 0) & 0xFF,
+ ];
+};
+
+/**
+ * Concatenate an arbitrary number of typed arrays of the same type into a new
+ * typed array of this type.
+ *
+ * @template TYPED_ARRAY
+ * @param {...!TYPED_ARRAY} arrays
+ * @returns {!TYPED_ARRAY}
+ */
+lib.array.concatTyped = function(...arrays) {
+ let resultLength = 0;
+ for (const array of arrays) {
+ resultLength += array.length;
+ }
+ const result = new arrays[0].constructor(resultLength);
+ let pos = 0;
+ for (const array of arrays) {
+ result.set(array, pos);
+ pos += array.length;
+ }
+ return result;
+};
+
+/**
+ * Compare two array-like objects entrywise.
+ *
+ * @template ARRAY_LIKE
+ * @param {?ARRAY_LIKE} a
+ * @param {?ARRAY_LIKE} b
+ * @returns {!boolean} true if both arrays are null or they agree entrywise;
+ * false otherwise.
+ */
+lib.array.compare = function(a, b) {
+ if (a === null || b === null) {
+ return a === null && b === null;
+ }
+
+ if (a.length !== b.length) {
+ return false;
+ }
+
+ for (let i = 0; i < a.length; i++) {
+ if (a[i] !== b[i]) {
+ return false;
+ }
+ }
+ return true;
+};
+// SOURCE FILE: libdot/js/lib_codec.js
+// Copyright 2018 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+lib.codec = {};
+
+/**
+ * Join an array of code units to a string.
+ *
+ * The code units must not be larger than 65535. The individual code units may
+ * be for UTF-8 or UTF-16 -- it doesn't matter since UTF-16 can handle all UTF-8
+ * code units.
+ *
+ * The input array type may be an Array or a typed Array (e.g. Uint8Array).
+ *
+ * @param {Array<number>} array The code units to generate for the string.
+ * @return {string} A UTF-16 encoded string.
+ */
+lib.codec.codeUnitArrayToString = function(array) {
+ // String concat is faster than Array.join.
+ let ret = '';
+ for (let i = 0; i < array.length; ++i) {
+ ret += String.fromCharCode(array[i]);
+ }
+ return ret;
+};
+
+/**
+ * Create an array of code units from a UTF-16 encoded string.
+ *
+ * @param {string} str The string to extract code units from.
+ * @param {type=} type The type of the return value.
+ * @return {Array<number>} The array of code units.
+ */
+lib.codec.stringToCodeUnitArray = function(str, type=Array) {
+ // Indexing string directly is faster than Array.map.
+ const ret = new type(str.length);
+ for (let i = 0; i < str.length; ++i) {
+ ret[i] = str.charCodeAt(i);
+ }
+ return ret;
+};
+// SOURCE FILE: libdot/js/lib_colors.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * Namespace for color utilities.
+ */
+lib.colors = {};
+
+/**
+ * First, some canned regular expressions we're going to use in this file.
+ *
+ *
+ * BRACE YOURSELF
+ *
+ * ,~~~~.
+ * |>_< ~~
+ * 3`---'-/.
+ * 3:::::\v\
+ * =o=:::::\,\
+ * | :::::\,,\
+ *
+ * THE REGULAR EXPRESSIONS
+ * ARE COMING.
+ *
+ * There's no way to break long RE literals in JavaScript. Fix that why don't
+ * you? Oh, and also there's no way to write a string that doesn't interpret
+ * escapes.
+ *
+ * Instead, we stoop to this .replace() trick.
+ */
+lib.colors.re_ = {
+ // CSS hex color, #RGB.
+ hex16: /#([a-f0-9])([a-f0-9])([a-f0-9])/i,
+
+ // CSS hex color, #RRGGBB.
+ hex24: /#([a-f0-9]{2})([a-f0-9]{2})([a-f0-9]{2})/i,
+
+ // CSS rgb color, rgb(rrr,ggg,bbb).
+ rgb: new RegExp(
+ ('^/s*rgb/s*/(/s*(/d{1,3})/s*,/s*(/d{1,3})/s*,' +
+ '/s*(/d{1,3})/s*/)/s*$'
+ ).replace(/\//g, '\\'), 'i'),
+
+ // CSS rgb color, rgb(rrr,ggg,bbb,aaa).
+ rgba: new RegExp(
+ ('^/s*rgba/s*' +
+ '/(/s*(/d{1,3})/s*,/s*(/d{1,3})/s*,/s*(/d{1,3})/s*' +
+ '(?:,/s*(/d+(?:/./d+)?)/s*)/)/s*$'
+ ).replace(/\//g, '\\'), 'i'),
+
+ // Either RGB or RGBA.
+ rgbx: new RegExp(
+ ('^/s*rgba?/s*' +
+ '/(/s*(/d{1,3})/s*,/s*(/d{1,3})/s*,/s*(/d{1,3})/s*' +
+ '(?:,/s*(/d+(?:/./d+)?)/s*)?/)/s*$'
+ ).replace(/\//g, '\\'), 'i'),
+
+ // An X11 "rgb:dddd/dddd/dddd" value.
+ x11rgb: /^\s*rgb:([a-f0-9]{1,4})\/([a-f0-9]{1,4})\/([a-f0-9]{1,4})\s*$/i,
+
+ // English color name.
+ name: /[a-z][a-z0-9\s]+/,
+};
+
+/**
+ * Convert a CSS rgb(ddd,ddd,ddd) color value into an X11 color value.
+ *
+ * Other CSS color values are ignored to ensure sanitary data handling.
+ *
+ * Each 'ddd' component is a one byte value specified in decimal.
+ *
+ * @param {string} value The CSS color value to convert.
+ * @return {string} The X11 color value or null if the value could not be
+ * converted.
+ */
+lib.colors.rgbToX11 = function(value) {
+ function scale(v) {
+ v = (Math.min(v, 255) * 257).toString(16);
+ return lib.f.zpad(v, 4);
+ }
+
+ var ary = value.match(lib.colors.re_.rgbx);
+ if (!ary)
+ return null;
+
+ return 'rgb:' + scale(ary[1]) + '/' + scale(ary[2]) + '/' + scale(ary[3]);
+};
+
+/**
+ * Convert a legacy X11 colover value into an CSS rgb(...) color value.
+ *
+ * They take the form:
+ * 12 bit: #RGB -> #R000G000B000
+ * 24 bit: #RRGGBB -> #RR00GG00BB00
+ * 36 bit: #RRRGGGBBB -> #RRR0GGG0BBB0
+ * 48 bit: #RRRRGGGGBBBB
+ * These are the most significant bits.
+ *
+ * Truncate values back down to 24 bit since that's all CSS supports.
+ */
+lib.colors.x11HexToCSS = function(v) {
+ if (!v.startsWith('#'))
+ return null;
+ // Strip the leading # off.
+ v = v.substr(1);
+
+ // Reject unknown sizes.
+ if ([3, 6, 9, 12].indexOf(v.length) == -1)
+ return null;
+
+ // Reject non-hex values.
+ if (v.match(/[^a-f0-9]/i))
+ return null;
+
+ // Split the colors out.
+ var size = v.length / 3;
+ var r = v.substr(0, size);
+ var g = v.substr(size, size);
+ var b = v.substr(size + size, size);
+
+ // Normalize to 16 bits.
+ function norm16(v) {
+ v = parseInt(v, 16);
+ return size == 2 ? v : // 16 bit
+ size == 1 ? v << 4 : // 8 bit
+ v >> (4 * (size - 2)); // 24 or 32 bit
+ }
+ return lib.colors.arrayToRGBA([r, g, b].map(norm16));
+};
+
+/**
+ * Convert an X11 color value into an CSS rgb(...) color value.
+ *
+ * The X11 value may be an X11 color name, or an RGB value of the form
+ * rgb:hhhh/hhhh/hhhh. If a component value is less than 4 digits it is
+ * padded out to 4, then scaled down to fit in a single byte.
+ *
+ * @param {string} value The X11 color value to convert.
+ * @return {string} The CSS color value or null if the value could not be
+ * converted.
+ */
+lib.colors.x11ToCSS = function(v) {
+ function scale(v) {
+ // Pad out values with less than four digits. This padding (probably)
+ // matches xterm. It's difficult to say for sure since xterm seems to
+ // arrive at a padded value and then perform some combination of
+ // gamma correction, color space transformation, and quantization.
+
+ if (v.length == 1) {
+ // Single digits pad out to four by repeating the character. "f" becomes
+ // "ffff". Scaling down a hex value of this pattern by 257 is the same
+ // as cutting off one byte. We skip the middle step and just double
+ // the character.
+ return parseInt(v + v, 16);
+ }
+
+ if (v.length == 2) {
+ // Similar deal here. X11 pads two digit values by repeating the
+ // byte (or scale up by 257). Since we're going to scale it back
+ // down anyway, we can just return the original value.
+ return parseInt(v, 16);
+ }
+
+ if (v.length == 3) {
+ // Three digit values seem to be padded by repeating the final digit.
+ // e.g. 10f becomes 10ff.
+ v = v + v.substr(2);
+ }
+
+ // Scale down the 2 byte value.
+ return Math.round(parseInt(v, 16) / 257);
+ }
+
+ var ary = v.match(lib.colors.re_.x11rgb);
+ if (!ary) {
+ // Handle the legacy format.
+ if (v.startsWith('#'))
+ return lib.colors.x11HexToCSS(v);
+ else
+ return lib.colors.nameToRGB(v);
+ }
+
+ ary.splice(0, 1);
+ return lib.colors.arrayToRGBA(ary.map(scale));
+};
+
+/**
+ * Converts one or more CSS '#RRGGBB' color values into their rgb(...)
+ * form.
+ *
+ * Arrays are converted in place. If a value cannot be converted, it is
+ * replaced with null.
+ *
+ * @param {string|Array.<string>} A single RGB value or array of RGB values to
+ * convert.
+ * @return {string|Array.<string>} The converted value or values.
+ */
+lib.colors.hexToRGB = function(arg) {
+ var hex16 = lib.colors.re_.hex16;
+ var hex24 = lib.colors.re_.hex24;
+
+ function convert(hex) {
+ if (hex.length == 4) {
+ hex = hex.replace(hex16, function(h, r, g, b) {
+ return "#" + r + r + g + g + b + b;
+ });
+ }
+ var ary = hex.match(hex24);
+ if (!ary)
+ return null;
+
+ return 'rgb(' + parseInt(ary[1], 16) + ', ' +
+ parseInt(ary[2], 16) + ', ' +
+ parseInt(ary[3], 16) + ')';
+ }
+
+ if (arg instanceof Array) {
+ for (var i = 0; i < arg.length; i++) {
+ arg[i] = convert(arg[i]);
+ }
+ } else {
+ arg = convert(arg);
+ }
+
+ return arg;
+};
+
+/**
+ * Converts one or more CSS rgb(...) forms into their '#RRGGBB' color values.
+ *
+ * If given an rgba(...) form, the alpha field is thrown away.
+ *
+ * Arrays are converted in place. If a value cannot be converted, it is
+ * replaced with null.
+ *
+ * @param {string|Array.<string>} A single rgb(...) value or array of rgb(...)
+ * values to convert.
+ * @return {string|Array.<string>} The converted value or values.
+ */
+lib.colors.rgbToHex = function(arg) {
+ function convert(rgb) {
+ var ary = lib.colors.crackRGB(rgb);
+ if (!ary)
+ return null;
+ return '#' + lib.f.zpad(((parseInt(ary[0]) << 16) |
+ (parseInt(ary[1]) << 8) |
+ (parseInt(ary[2]) << 0)).toString(16), 6);
+ }
+
+ if (arg instanceof Array) {
+ for (var i = 0; i < arg.length; i++) {
+ arg[i] = convert(arg[i]);
+ }
+ } else {
+ arg = convert(arg);
+ }
+
+ return arg;
+};
+
+/**
+ * Take any valid css color definition and turn it into an rgb or rgba value.
+ *
+ * Returns null if the value could not be normalized.
+ */
+lib.colors.normalizeCSS = function(def) {
+ if (def.startsWith('#'))
+ return lib.colors.hexToRGB(def);
+
+ if (lib.colors.re_.rgbx.test(def))
+ return def;
+
+ return lib.colors.nameToRGB(def);
+};
+
+/**
+ * Convert a 3 or 4 element array into an rgba(...) string.
+ */
+lib.colors.arrayToRGBA = function(ary) {
+ var alpha = (ary.length > 3) ? ary[3] : 1;
+ return 'rgba(' + ary[0] + ', ' + ary[1] + ', ' + ary[2] + ', ' + alpha + ')';
+};
+
+/**
+ * Overwrite the alpha channel of an rgb/rgba color.
+ */
+lib.colors.setAlpha = function(rgb, alpha) {
+ var ary = lib.colors.crackRGB(rgb);
+ ary[3] = alpha;
+ return lib.colors.arrayToRGBA(ary);
+};
+
+/**
+ * Mix a percentage of a tint color into a base color.
+ */
+lib.colors.mix = function(base, tint, percent) {
+ var ary1 = lib.colors.crackRGB(base);
+ var ary2 = lib.colors.crackRGB(tint);
+
+ for (var i = 0; i < 4; ++i) {
+ var diff = ary2[i] - ary1[i];
+ ary1[i] = Math.round(parseInt(ary1[i]) + diff * percent);
+ }
+
+ return lib.colors.arrayToRGBA(ary1);
+};
+
+/**
+ * Split an rgb/rgba color into an array of its components.
+ *
+ * On success, a 4 element array will be returned. For rgb values, the alpha
+ * will be set to 1.
+ */
+lib.colors.crackRGB = function(color) {
+ if (color.startsWith('rgba')) {
+ var ary = color.match(lib.colors.re_.rgba);
+ if (ary) {
+ ary.shift();
+ return ary;
+ }
+ } else {
+ var ary = color.match(lib.colors.re_.rgb);
+ if (ary) {
+ ary.shift();
+ ary.push('1');
+ return ary;
+ }
+ }
+
+ console.error('Couldn\'t crack: ' + color);
+ return null;
+};
+
+/**
+ * Convert an X11 color name into a CSS rgb(...) value.
+ *
+ * Names are stripped of spaces and converted to lowercase. If the name is
+ * unknown, null is returned.
+ *
+ * This list of color name to RGB mapping is derived from the stock X11
+ * rgb.txt file.
+ *
+ * @param {string} name The color name to convert.
+ * @return {string} The corresponding CSS rgb(...) value.
+ */
+lib.colors.nameToRGB = function(name) {
+ if (name in lib.colors.colorNames)
+ return lib.colors.colorNames[name];
+
+ name = name.toLowerCase();
+ if (name in lib.colors.colorNames)
+ return lib.colors.colorNames[name];
+
+ name = name.replace(/\s+/g, '');
+ if (name in lib.colors.colorNames)
+ return lib.colors.colorNames[name];
+
+ return null;
+};
+
+/**
+ * The stock color palette.
+ */
+lib.colors.stockColorPalette = lib.colors.hexToRGB
+ ([// The "ANSI 16"...
+ '#000000', '#CC0000', '#4E9A06', '#C4A000',
+ '#3465A4', '#75507B', '#06989A', '#D3D7CF',
+ '#555753', '#EF2929', '#00BA13', '#FCE94F',
+ '#729FCF', '#F200CB', '#00B5BD', '#EEEEEC',
+
+ // The 6x6 color cubes...
+ '#000000', '#00005F', '#000087', '#0000AF', '#0000D7', '#0000FF',
+ '#005F00', '#005F5F', '#005F87', '#005FAF', '#005FD7', '#005FFF',
+ '#008700', '#00875F', '#008787', '#0087AF', '#0087D7', '#0087FF',
+ '#00AF00', '#00AF5F', '#00AF87', '#00AFAF', '#00AFD7', '#00AFFF',
+ '#00D700', '#00D75F', '#00D787', '#00D7AF', '#00D7D7', '#00D7FF',
+ '#00FF00', '#00FF5F', '#00FF87', '#00FFAF', '#00FFD7', '#00FFFF',
+
+ '#5F0000', '#5F005F', '#5F0087', '#5F00AF', '#5F00D7', '#5F00FF',
+ '#5F5F00', '#5F5F5F', '#5F5F87', '#5F5FAF', '#5F5FD7', '#5F5FFF',
+ '#5F8700', '#5F875F', '#5F8787', '#5F87AF', '#5F87D7', '#5F87FF',
+ '#5FAF00', '#5FAF5F', '#5FAF87', '#5FAFAF', '#5FAFD7', '#5FAFFF',
+ '#5FD700', '#5FD75F', '#5FD787', '#5FD7AF', '#5FD7D7', '#5FD7FF',
+ '#5FFF00', '#5FFF5F', '#5FFF87', '#5FFFAF', '#5FFFD7', '#5FFFFF',
+
+ '#870000', '#87005F', '#870087', '#8700AF', '#8700D7', '#8700FF',
+ '#875F00', '#875F5F', '#875F87', '#875FAF', '#875FD7', '#875FFF',
+ '#878700', '#87875F', '#878787', '#8787AF', '#8787D7', '#8787FF',
+ '#87AF00', '#87AF5F', '#87AF87', '#87AFAF', '#87AFD7', '#87AFFF',
+ '#87D700', '#87D75F', '#87D787', '#87D7AF', '#87D7D7', '#87D7FF',
+ '#87FF00', '#87FF5F', '#87FF87', '#87FFAF', '#87FFD7', '#87FFFF',
+
+ '#AF0000', '#AF005F', '#AF0087', '#AF00AF', '#AF00D7', '#AF00FF',
+ '#AF5F00', '#AF5F5F', '#AF5F87', '#AF5FAF', '#AF5FD7', '#AF5FFF',
+ '#AF8700', '#AF875F', '#AF8787', '#AF87AF', '#AF87D7', '#AF87FF',
+ '#AFAF00', '#AFAF5F', '#AFAF87', '#AFAFAF', '#AFAFD7', '#AFAFFF',
+ '#AFD700', '#AFD75F', '#AFD787', '#AFD7AF', '#AFD7D7', '#AFD7FF',
+ '#AFFF00', '#AFFF5F', '#AFFF87', '#AFFFAF', '#AFFFD7', '#AFFFFF',
+
+ '#D70000', '#D7005F', '#D70087', '#D700AF', '#D700D7', '#D700FF',
+ '#D75F00', '#D75F5F', '#D75F87', '#D75FAF', '#D75FD7', '#D75FFF',
+ '#D78700', '#D7875F', '#D78787', '#D787AF', '#D787D7', '#D787FF',
+ '#D7AF00', '#D7AF5F', '#D7AF87', '#D7AFAF', '#D7AFD7', '#D7AFFF',
+ '#D7D700', '#D7D75F', '#D7D787', '#D7D7AF', '#D7D7D7', '#D7D7FF',
+ '#D7FF00', '#D7FF5F', '#D7FF87', '#D7FFAF', '#D7FFD7', '#D7FFFF',
+
+ '#FF0000', '#FF005F', '#FF0087', '#FF00AF', '#FF00D7', '#FF00FF',
+ '#FF5F00', '#FF5F5F', '#FF5F87', '#FF5FAF', '#FF5FD7', '#FF5FFF',
+ '#FF8700', '#FF875F', '#FF8787', '#FF87AF', '#FF87D7', '#FF87FF',
+ '#FFAF00', '#FFAF5F', '#FFAF87', '#FFAFAF', '#FFAFD7', '#FFAFFF',
+ '#FFD700', '#FFD75F', '#FFD787', '#FFD7AF', '#FFD7D7', '#FFD7FF',
+ '#FFFF00', '#FFFF5F', '#FFFF87', '#FFFFAF', '#FFFFD7', '#FFFFFF',
+
+ // The greyscale ramp...
+ '#080808', '#121212', '#1C1C1C', '#262626', '#303030', '#3A3A3A',
+ '#444444', '#4E4E4E', '#585858', '#626262', '#6C6C6C', '#767676',
+ '#808080', '#8A8A8A', '#949494', '#9E9E9E', '#A8A8A8', '#B2B2B2',
+ '#BCBCBC', '#C6C6C6', '#D0D0D0', '#DADADA', '#E4E4E4', '#EEEEEE'
+ ]);
+
+/**
+ * The current color palette, possibly with user changes.
+ */
+lib.colors.colorPalette = lib.colors.stockColorPalette;
+
+/**
+ * Named colors according to the stock X11 rgb.txt file.
+ */
+lib.colors.colorNames = {
+ "aliceblue": "rgb(240, 248, 255)",
+ "antiquewhite": "rgb(250, 235, 215)",
+ "antiquewhite1": "rgb(255, 239, 219)",
+ "antiquewhite2": "rgb(238, 223, 204)",
+ "antiquewhite3": "rgb(205, 192, 176)",
+ "antiquewhite4": "rgb(139, 131, 120)",
+ "aquamarine": "rgb(127, 255, 212)",
+ "aquamarine1": "rgb(127, 255, 212)",
+ "aquamarine2": "rgb(118, 238, 198)",
+ "aquamarine3": "rgb(102, 205, 170)",
+ "aquamarine4": "rgb(69, 139, 116)",
+ "azure": "rgb(240, 255, 255)",
+ "azure1": "rgb(240, 255, 255)",
+ "azure2": "rgb(224, 238, 238)",
+ "azure3": "rgb(193, 205, 205)",
+ "azure4": "rgb(131, 139, 139)",
+ "beige": "rgb(245, 245, 220)",
+ "bisque": "rgb(255, 228, 196)",
+ "bisque1": "rgb(255, 228, 196)",
+ "bisque2": "rgb(238, 213, 183)",
+ "bisque3": "rgb(205, 183, 158)",
+ "bisque4": "rgb(139, 125, 107)",
+ "black": "rgb(0, 0, 0)",
+ "blanchedalmond": "rgb(255, 235, 205)",
+ "blue": "rgb(0, 0, 255)",
+ "blue1": "rgb(0, 0, 255)",
+ "blue2": "rgb(0, 0, 238)",
+ "blue3": "rgb(0, 0, 205)",
+ "blue4": "rgb(0, 0, 139)",
+ "blueviolet": "rgb(138, 43, 226)",
+ "brown": "rgb(165, 42, 42)",
+ "brown1": "rgb(255, 64, 64)",
+ "brown2": "rgb(238, 59, 59)",
+ "brown3": "rgb(205, 51, 51)",
+ "brown4": "rgb(139, 35, 35)",
+ "burlywood": "rgb(222, 184, 135)",
+ "burlywood1": "rgb(255, 211, 155)",
+ "burlywood2": "rgb(238, 197, 145)",
+ "burlywood3": "rgb(205, 170, 125)",
+ "burlywood4": "rgb(139, 115, 85)",
+ "cadetblue": "rgb(95, 158, 160)",
+ "cadetblue1": "rgb(152, 245, 255)",
+ "cadetblue2": "rgb(142, 229, 238)",
+ "cadetblue3": "rgb(122, 197, 205)",
+ "cadetblue4": "rgb(83, 134, 139)",
+ "chartreuse": "rgb(127, 255, 0)",
+ "chartreuse1": "rgb(127, 255, 0)",
+ "chartreuse2": "rgb(118, 238, 0)",
+ "chartreuse3": "rgb(102, 205, 0)",
+ "chartreuse4": "rgb(69, 139, 0)",
+ "chocolate": "rgb(210, 105, 30)",
+ "chocolate1": "rgb(255, 127, 36)",
+ "chocolate2": "rgb(238, 118, 33)",
+ "chocolate3": "rgb(205, 102, 29)",
+ "chocolate4": "rgb(139, 69, 19)",
+ "coral": "rgb(255, 127, 80)",
+ "coral1": "rgb(255, 114, 86)",
+ "coral2": "rgb(238, 106, 80)",
+ "coral3": "rgb(205, 91, 69)",
+ "coral4": "rgb(139, 62, 47)",
+ "cornflowerblue": "rgb(100, 149, 237)",
+ "cornsilk": "rgb(255, 248, 220)",
+ "cornsilk1": "rgb(255, 248, 220)",
+ "cornsilk2": "rgb(238, 232, 205)",
+ "cornsilk3": "rgb(205, 200, 177)",
+ "cornsilk4": "rgb(139, 136, 120)",
+ "cyan": "rgb(0, 255, 255)",
+ "cyan1": "rgb(0, 255, 255)",
+ "cyan2": "rgb(0, 238, 238)",
+ "cyan3": "rgb(0, 205, 205)",
+ "cyan4": "rgb(0, 139, 139)",
+ "darkblue": "rgb(0, 0, 139)",
+ "darkcyan": "rgb(0, 139, 139)",
+ "darkgoldenrod": "rgb(184, 134, 11)",
+ "darkgoldenrod1": "rgb(255, 185, 15)",
+ "darkgoldenrod2": "rgb(238, 173, 14)",
+ "darkgoldenrod3": "rgb(205, 149, 12)",
+ "darkgoldenrod4": "rgb(139, 101, 8)",
+ "darkgray": "rgb(169, 169, 169)",
+ "darkgreen": "rgb(0, 100, 0)",
+ "darkgrey": "rgb(169, 169, 169)",
+ "darkkhaki": "rgb(189, 183, 107)",
+ "darkmagenta": "rgb(139, 0, 139)",
+ "darkolivegreen": "rgb(85, 107, 47)",
+ "darkolivegreen1": "rgb(202, 255, 112)",
+ "darkolivegreen2": "rgb(188, 238, 104)",
+ "darkolivegreen3": "rgb(162, 205, 90)",
+ "darkolivegreen4": "rgb(110, 139, 61)",
+ "darkorange": "rgb(255, 140, 0)",
+ "darkorange1": "rgb(255, 127, 0)",
+ "darkorange2": "rgb(238, 118, 0)",
+ "darkorange3": "rgb(205, 102, 0)",
+ "darkorange4": "rgb(139, 69, 0)",
+ "darkorchid": "rgb(153, 50, 204)",
+ "darkorchid1": "rgb(191, 62, 255)",
+ "darkorchid2": "rgb(178, 58, 238)",
+ "darkorchid3": "rgb(154, 50, 205)",
+ "darkorchid4": "rgb(104, 34, 139)",
+ "darkred": "rgb(139, 0, 0)",
+ "darksalmon": "rgb(233, 150, 122)",
+ "darkseagreen": "rgb(143, 188, 143)",
+ "darkseagreen1": "rgb(193, 255, 193)",
+ "darkseagreen2": "rgb(180, 238, 180)",
+ "darkseagreen3": "rgb(155, 205, 155)",
+ "darkseagreen4": "rgb(105, 139, 105)",
+ "darkslateblue": "rgb(72, 61, 139)",
+ "darkslategray": "rgb(47, 79, 79)",
+ "darkslategray1": "rgb(151, 255, 255)",
+ "darkslategray2": "rgb(141, 238, 238)",
+ "darkslategray3": "rgb(121, 205, 205)",
+ "darkslategray4": "rgb(82, 139, 139)",
+ "darkslategrey": "rgb(47, 79, 79)",
+ "darkturquoise": "rgb(0, 206, 209)",
+ "darkviolet": "rgb(148, 0, 211)",
+ "debianred": "rgb(215, 7, 81)",
+ "deeppink": "rgb(255, 20, 147)",
+ "deeppink1": "rgb(255, 20, 147)",
+ "deeppink2": "rgb(238, 18, 137)",
+ "deeppink3": "rgb(205, 16, 118)",
+ "deeppink4": "rgb(139, 10, 80)",
+ "deepskyblue": "rgb(0, 191, 255)",
+ "deepskyblue1": "rgb(0, 191, 255)",
+ "deepskyblue2": "rgb(0, 178, 238)",
+ "deepskyblue3": "rgb(0, 154, 205)",
+ "deepskyblue4": "rgb(0, 104, 139)",
+ "dimgray": "rgb(105, 105, 105)",
+ "dimgrey": "rgb(105, 105, 105)",
+ "dodgerblue": "rgb(30, 144, 255)",
+ "dodgerblue1": "rgb(30, 144, 255)",
+ "dodgerblue2": "rgb(28, 134, 238)",
+ "dodgerblue3": "rgb(24, 116, 205)",
+ "dodgerblue4": "rgb(16, 78, 139)",
+ "firebrick": "rgb(178, 34, 34)",
+ "firebrick1": "rgb(255, 48, 48)",
+ "firebrick2": "rgb(238, 44, 44)",
+ "firebrick3": "rgb(205, 38, 38)",
+ "firebrick4": "rgb(139, 26, 26)",
+ "floralwhite": "rgb(255, 250, 240)",
+ "forestgreen": "rgb(34, 139, 34)",
+ "gainsboro": "rgb(220, 220, 220)",
+ "ghostwhite": "rgb(248, 248, 255)",
+ "gold": "rgb(255, 215, 0)",
+ "gold1": "rgb(255, 215, 0)",
+ "gold2": "rgb(238, 201, 0)",
+ "gold3": "rgb(205, 173, 0)",
+ "gold4": "rgb(139, 117, 0)",
+ "goldenrod": "rgb(218, 165, 32)",
+ "goldenrod1": "rgb(255, 193, 37)",
+ "goldenrod2": "rgb(238, 180, 34)",
+ "goldenrod3": "rgb(205, 155, 29)",
+ "goldenrod4": "rgb(139, 105, 20)",
+ "gray": "rgb(190, 190, 190)",
+ "gray0": "rgb(0, 0, 0)",
+ "gray1": "rgb(3, 3, 3)",
+ "gray10": "rgb(26, 26, 26)",
+ "gray100": "rgb(255, 255, 255)",
+ "gray11": "rgb(28, 28, 28)",
+ "gray12": "rgb(31, 31, 31)",
+ "gray13": "rgb(33, 33, 33)",
+ "gray14": "rgb(36, 36, 36)",
+ "gray15": "rgb(38, 38, 38)",
+ "gray16": "rgb(41, 41, 41)",
+ "gray17": "rgb(43, 43, 43)",
+ "gray18": "rgb(46, 46, 46)",
+ "gray19": "rgb(48, 48, 48)",
+ "gray2": "rgb(5, 5, 5)",
+ "gray20": "rgb(51, 51, 51)",
+ "gray21": "rgb(54, 54, 54)",
+ "gray22": "rgb(56, 56, 56)",
+ "gray23": "rgb(59, 59, 59)",
+ "gray24": "rgb(61, 61, 61)",
+ "gray25": "rgb(64, 64, 64)",
+ "gray26": "rgb(66, 66, 66)",
+ "gray27": "rgb(69, 69, 69)",
+ "gray28": "rgb(71, 71, 71)",
+ "gray29": "rgb(74, 74, 74)",
+ "gray3": "rgb(8, 8, 8)",
+ "gray30": "rgb(77, 77, 77)",
+ "gray31": "rgb(79, 79, 79)",
+ "gray32": "rgb(82, 82, 82)",
+ "gray33": "rgb(84, 84, 84)",
+ "gray34": "rgb(87, 87, 87)",
+ "gray35": "rgb(89, 89, 89)",
+ "gray36": "rgb(92, 92, 92)",
+ "gray37": "rgb(94, 94, 94)",
+ "gray38": "rgb(97, 97, 97)",
+ "gray39": "rgb(99, 99, 99)",
+ "gray4": "rgb(10, 10, 10)",
+ "gray40": "rgb(102, 102, 102)",
+ "gray41": "rgb(105, 105, 105)",
+ "gray42": "rgb(107, 107, 107)",
+ "gray43": "rgb(110, 110, 110)",
+ "gray44": "rgb(112, 112, 112)",
+ "gray45": "rgb(115, 115, 115)",
+ "gray46": "rgb(117, 117, 117)",
+ "gray47": "rgb(120, 120, 120)",
+ "gray48": "rgb(122, 122, 122)",
+ "gray49": "rgb(125, 125, 125)",
+ "gray5": "rgb(13, 13, 13)",
+ "gray50": "rgb(127, 127, 127)",
+ "gray51": "rgb(130, 130, 130)",
+ "gray52": "rgb(133, 133, 133)",
+ "gray53": "rgb(135, 135, 135)",
+ "gray54": "rgb(138, 138, 138)",
+ "gray55": "rgb(140, 140, 140)",
+ "gray56": "rgb(143, 143, 143)",
+ "gray57": "rgb(145, 145, 145)",
+ "gray58": "rgb(148, 148, 148)",
+ "gray59": "rgb(150, 150, 150)",
+ "gray6": "rgb(15, 15, 15)",
+ "gray60": "rgb(153, 153, 153)",
+ "gray61": "rgb(156, 156, 156)",
+ "gray62": "rgb(158, 158, 158)",
+ "gray63": "rgb(161, 161, 161)",
+ "gray64": "rgb(163, 163, 163)",
+ "gray65": "rgb(166, 166, 166)",
+ "gray66": "rgb(168, 168, 168)",
+ "gray67": "rgb(171, 171, 171)",
+ "gray68": "rgb(173, 173, 173)",
+ "gray69": "rgb(176, 176, 176)",
+ "gray7": "rgb(18, 18, 18)",
+ "gray70": "rgb(179, 179, 179)",
+ "gray71": "rgb(181, 181, 181)",
+ "gray72": "rgb(184, 184, 184)",
+ "gray73": "rgb(186, 186, 186)",
+ "gray74": "rgb(189, 189, 189)",
+ "gray75": "rgb(191, 191, 191)",
+ "gray76": "rgb(194, 194, 194)",
+ "gray77": "rgb(196, 196, 196)",
+ "gray78": "rgb(199, 199, 199)",
+ "gray79": "rgb(201, 201, 201)",
+ "gray8": "rgb(20, 20, 20)",
+ "gray80": "rgb(204, 204, 204)",
+ "gray81": "rgb(207, 207, 207)",
+ "gray82": "rgb(209, 209, 209)",
+ "gray83": "rgb(212, 212, 212)",
+ "gray84": "rgb(214, 214, 214)",
+ "gray85": "rgb(217, 217, 217)",
+ "gray86": "rgb(219, 219, 219)",
+ "gray87": "rgb(222, 222, 222)",
+ "gray88": "rgb(224, 224, 224)",
+ "gray89": "rgb(227, 227, 227)",
+ "gray9": "rgb(23, 23, 23)",
+ "gray90": "rgb(229, 229, 229)",
+ "gray91": "rgb(232, 232, 232)",
+ "gray92": "rgb(235, 235, 235)",
+ "gray93": "rgb(237, 237, 237)",
+ "gray94": "rgb(240, 240, 240)",
+ "gray95": "rgb(242, 242, 242)",
+ "gray96": "rgb(245, 245, 245)",
+ "gray97": "rgb(247, 247, 247)",
+ "gray98": "rgb(250, 250, 250)",
+ "gray99": "rgb(252, 252, 252)",
+ "green": "rgb(0, 255, 0)",
+ "green1": "rgb(0, 255, 0)",
+ "green2": "rgb(0, 238, 0)",
+ "green3": "rgb(0, 205, 0)",
+ "green4": "rgb(0, 139, 0)",
+ "greenyellow": "rgb(173, 255, 47)",
+ "grey": "rgb(190, 190, 190)",
+ "grey0": "rgb(0, 0, 0)",
+ "grey1": "rgb(3, 3, 3)",
+ "grey10": "rgb(26, 26, 26)",
+ "grey100": "rgb(255, 255, 255)",
+ "grey11": "rgb(28, 28, 28)",
+ "grey12": "rgb(31, 31, 31)",
+ "grey13": "rgb(33, 33, 33)",
+ "grey14": "rgb(36, 36, 36)",
+ "grey15": "rgb(38, 38, 38)",
+ "grey16": "rgb(41, 41, 41)",
+ "grey17": "rgb(43, 43, 43)",
+ "grey18": "rgb(46, 46, 46)",
+ "grey19": "rgb(48, 48, 48)",
+ "grey2": "rgb(5, 5, 5)",
+ "grey20": "rgb(51, 51, 51)",
+ "grey21": "rgb(54, 54, 54)",
+ "grey22": "rgb(56, 56, 56)",
+ "grey23": "rgb(59, 59, 59)",
+ "grey24": "rgb(61, 61, 61)",
+ "grey25": "rgb(64, 64, 64)",
+ "grey26": "rgb(66, 66, 66)",
+ "grey27": "rgb(69, 69, 69)",
+ "grey28": "rgb(71, 71, 71)",
+ "grey29": "rgb(74, 74, 74)",
+ "grey3": "rgb(8, 8, 8)",
+ "grey30": "rgb(77, 77, 77)",
+ "grey31": "rgb(79, 79, 79)",
+ "grey32": "rgb(82, 82, 82)",
+ "grey33": "rgb(84, 84, 84)",
+ "grey34": "rgb(87, 87, 87)",
+ "grey35": "rgb(89, 89, 89)",
+ "grey36": "rgb(92, 92, 92)",
+ "grey37": "rgb(94, 94, 94)",
+ "grey38": "rgb(97, 97, 97)",
+ "grey39": "rgb(99, 99, 99)",
+ "grey4": "rgb(10, 10, 10)",
+ "grey40": "rgb(102, 102, 102)",
+ "grey41": "rgb(105, 105, 105)",
+ "grey42": "rgb(107, 107, 107)",
+ "grey43": "rgb(110, 110, 110)",
+ "grey44": "rgb(112, 112, 112)",
+ "grey45": "rgb(115, 115, 115)",
+ "grey46": "rgb(117, 117, 117)",
+ "grey47": "rgb(120, 120, 120)",
+ "grey48": "rgb(122, 122, 122)",
+ "grey49": "rgb(125, 125, 125)",
+ "grey5": "rgb(13, 13, 13)",
+ "grey50": "rgb(127, 127, 127)",
+ "grey51": "rgb(130, 130, 130)",
+ "grey52": "rgb(133, 133, 133)",
+ "grey53": "rgb(135, 135, 135)",
+ "grey54": "rgb(138, 138, 138)",
+ "grey55": "rgb(140, 140, 140)",
+ "grey56": "rgb(143, 143, 143)",
+ "grey57": "rgb(145, 145, 145)",
+ "grey58": "rgb(148, 148, 148)",
+ "grey59": "rgb(150, 150, 150)",
+ "grey6": "rgb(15, 15, 15)",
+ "grey60": "rgb(153, 153, 153)",
+ "grey61": "rgb(156, 156, 156)",
+ "grey62": "rgb(158, 158, 158)",
+ "grey63": "rgb(161, 161, 161)",
+ "grey64": "rgb(163, 163, 163)",
+ "grey65": "rgb(166, 166, 166)",
+ "grey66": "rgb(168, 168, 168)",
+ "grey67": "rgb(171, 171, 171)",
+ "grey68": "rgb(173, 173, 173)",
+ "grey69": "rgb(176, 176, 176)",
+ "grey7": "rgb(18, 18, 18)",
+ "grey70": "rgb(179, 179, 179)",
+ "grey71": "rgb(181, 181, 181)",
+ "grey72": "rgb(184, 184, 184)",
+ "grey73": "rgb(186, 186, 186)",
+ "grey74": "rgb(189, 189, 189)",
+ "grey75": "rgb(191, 191, 191)",
+ "grey76": "rgb(194, 194, 194)",
+ "grey77": "rgb(196, 196, 196)",
+ "grey78": "rgb(199, 199, 199)",
+ "grey79": "rgb(201, 201, 201)",
+ "grey8": "rgb(20, 20, 20)",
+ "grey80": "rgb(204, 204, 204)",
+ "grey81": "rgb(207, 207, 207)",
+ "grey82": "rgb(209, 209, 209)",
+ "grey83": "rgb(212, 212, 212)",
+ "grey84": "rgb(214, 214, 214)",
+ "grey85": "rgb(217, 217, 217)",
+ "grey86": "rgb(219, 219, 219)",
+ "grey87": "rgb(222, 222, 222)",
+ "grey88": "rgb(224, 224, 224)",
+ "grey89": "rgb(227, 227, 227)",
+ "grey9": "rgb(23, 23, 23)",
+ "grey90": "rgb(229, 229, 229)",
+ "grey91": "rgb(232, 232, 232)",
+ "grey92": "rgb(235, 235, 235)",
+ "grey93": "rgb(237, 237, 237)",
+ "grey94": "rgb(240, 240, 240)",
+ "grey95": "rgb(242, 242, 242)",
+ "grey96": "rgb(245, 245, 245)",
+ "grey97": "rgb(247, 247, 247)",
+ "grey98": "rgb(250, 250, 250)",
+ "grey99": "rgb(252, 252, 252)",
+ "honeydew": "rgb(240, 255, 240)",
+ "honeydew1": "rgb(240, 255, 240)",
+ "honeydew2": "rgb(224, 238, 224)",
+ "honeydew3": "rgb(193, 205, 193)",
+ "honeydew4": "rgb(131, 139, 131)",
+ "hotpink": "rgb(255, 105, 180)",
+ "hotpink1": "rgb(255, 110, 180)",
+ "hotpink2": "rgb(238, 106, 167)",
+ "hotpink3": "rgb(205, 96, 144)",
+ "hotpink4": "rgb(139, 58, 98)",
+ "indianred": "rgb(205, 92, 92)",
+ "indianred1": "rgb(255, 106, 106)",
+ "indianred2": "rgb(238, 99, 99)",
+ "indianred3": "rgb(205, 85, 85)",
+ "indianred4": "rgb(139, 58, 58)",
+ "ivory": "rgb(255, 255, 240)",
+ "ivory1": "rgb(255, 255, 240)",
+ "ivory2": "rgb(238, 238, 224)",
+ "ivory3": "rgb(205, 205, 193)",
+ "ivory4": "rgb(139, 139, 131)",
+ "khaki": "rgb(240, 230, 140)",
+ "khaki1": "rgb(255, 246, 143)",
+ "khaki2": "rgb(238, 230, 133)",
+ "khaki3": "rgb(205, 198, 115)",
+ "khaki4": "rgb(139, 134, 78)",
+ "lavender": "rgb(230, 230, 250)",
+ "lavenderblush": "rgb(255, 240, 245)",
+ "lavenderblush1": "rgb(255, 240, 245)",
+ "lavenderblush2": "rgb(238, 224, 229)",
+ "lavenderblush3": "rgb(205, 193, 197)",
+ "lavenderblush4": "rgb(139, 131, 134)",
+ "lawngreen": "rgb(124, 252, 0)",
+ "lemonchiffon": "rgb(255, 250, 205)",
+ "lemonchiffon1": "rgb(255, 250, 205)",
+ "lemonchiffon2": "rgb(238, 233, 191)",
+ "lemonchiffon3": "rgb(205, 201, 165)",
+ "lemonchiffon4": "rgb(139, 137, 112)",
+ "lightblue": "rgb(173, 216, 230)",
+ "lightblue1": "rgb(191, 239, 255)",
+ "lightblue2": "rgb(178, 223, 238)",
+ "lightblue3": "rgb(154, 192, 205)",
+ "lightblue4": "rgb(104, 131, 139)",
+ "lightcoral": "rgb(240, 128, 128)",
+ "lightcyan": "rgb(224, 255, 255)",
+ "lightcyan1": "rgb(224, 255, 255)",
+ "lightcyan2": "rgb(209, 238, 238)",
+ "lightcyan3": "rgb(180, 205, 205)",
+ "lightcyan4": "rgb(122, 139, 139)",
+ "lightgoldenrod": "rgb(238, 221, 130)",
+ "lightgoldenrod1": "rgb(255, 236, 139)",
+ "lightgoldenrod2": "rgb(238, 220, 130)",
+ "lightgoldenrod3": "rgb(205, 190, 112)",
+ "lightgoldenrod4": "rgb(139, 129, 76)",
+ "lightgoldenrodyellow": "rgb(250, 250, 210)",
+ "lightgray": "rgb(211, 211, 211)",
+ "lightgreen": "rgb(144, 238, 144)",
+ "lightgrey": "rgb(211, 211, 211)",
+ "lightpink": "rgb(255, 182, 193)",
+ "lightpink1": "rgb(255, 174, 185)",
+ "lightpink2": "rgb(238, 162, 173)",
+ "lightpink3": "rgb(205, 140, 149)",
+ "lightpink4": "rgb(139, 95, 101)",
+ "lightsalmon": "rgb(255, 160, 122)",
+ "lightsalmon1": "rgb(255, 160, 122)",
+ "lightsalmon2": "rgb(238, 149, 114)",
+ "lightsalmon3": "rgb(205, 129, 98)",
+ "lightsalmon4": "rgb(139, 87, 66)",
+ "lightseagreen": "rgb(32, 178, 170)",
+ "lightskyblue": "rgb(135, 206, 250)",
+ "lightskyblue1": "rgb(176, 226, 255)",
+ "lightskyblue2": "rgb(164, 211, 238)",
+ "lightskyblue3": "rgb(141, 182, 205)",
+ "lightskyblue4": "rgb(96, 123, 139)",
+ "lightslateblue": "rgb(132, 112, 255)",
+ "lightslategray": "rgb(119, 136, 153)",
+ "lightslategrey": "rgb(119, 136, 153)",
+ "lightsteelblue": "rgb(176, 196, 222)",
+ "lightsteelblue1": "rgb(202, 225, 255)",
+ "lightsteelblue2": "rgb(188, 210, 238)",
+ "lightsteelblue3": "rgb(162, 181, 205)",
+ "lightsteelblue4": "rgb(110, 123, 139)",
+ "lightyellow": "rgb(255, 255, 224)",
+ "lightyellow1": "rgb(255, 255, 224)",
+ "lightyellow2": "rgb(238, 238, 209)",
+ "lightyellow3": "rgb(205, 205, 180)",
+ "lightyellow4": "rgb(139, 139, 122)",
+ "limegreen": "rgb(50, 205, 50)",
+ "linen": "rgb(250, 240, 230)",
+ "magenta": "rgb(255, 0, 255)",
+ "magenta1": "rgb(255, 0, 255)",
+ "magenta2": "rgb(238, 0, 238)",
+ "magenta3": "rgb(205, 0, 205)",
+ "magenta4": "rgb(139, 0, 139)",
+ "maroon": "rgb(176, 48, 96)",
+ "maroon1": "rgb(255, 52, 179)",
+ "maroon2": "rgb(238, 48, 167)",
+ "maroon3": "rgb(205, 41, 144)",
+ "maroon4": "rgb(139, 28, 98)",
+ "mediumaquamarine": "rgb(102, 205, 170)",
+ "mediumblue": "rgb(0, 0, 205)",
+ "mediumorchid": "rgb(186, 85, 211)",
+ "mediumorchid1": "rgb(224, 102, 255)",
+ "mediumorchid2": "rgb(209, 95, 238)",
+ "mediumorchid3": "rgb(180, 82, 205)",
+ "mediumorchid4": "rgb(122, 55, 139)",
+ "mediumpurple": "rgb(147, 112, 219)",
+ "mediumpurple1": "rgb(171, 130, 255)",
+ "mediumpurple2": "rgb(159, 121, 238)",
+ "mediumpurple3": "rgb(137, 104, 205)",
+ "mediumpurple4": "rgb(93, 71, 139)",
+ "mediumseagreen": "rgb(60, 179, 113)",
+ "mediumslateblue": "rgb(123, 104, 238)",
+ "mediumspringgreen": "rgb(0, 250, 154)",
+ "mediumturquoise": "rgb(72, 209, 204)",
+ "mediumvioletred": "rgb(199, 21, 133)",
+ "midnightblue": "rgb(25, 25, 112)",
+ "mintcream": "rgb(245, 255, 250)",
+ "mistyrose": "rgb(255, 228, 225)",
+ "mistyrose1": "rgb(255, 228, 225)",
+ "mistyrose2": "rgb(238, 213, 210)",
+ "mistyrose3": "rgb(205, 183, 181)",
+ "mistyrose4": "rgb(139, 125, 123)",
+ "moccasin": "rgb(255, 228, 181)",
+ "navajowhite": "rgb(255, 222, 173)",
+ "navajowhite1": "rgb(255, 222, 173)",
+ "navajowhite2": "rgb(238, 207, 161)",
+ "navajowhite3": "rgb(205, 179, 139)",
+ "navajowhite4": "rgb(139, 121, 94)",
+ "navy": "rgb(0, 0, 128)",
+ "navyblue": "rgb(0, 0, 128)",
+ "oldlace": "rgb(253, 245, 230)",
+ "olivedrab": "rgb(107, 142, 35)",
+ "olivedrab1": "rgb(192, 255, 62)",
+ "olivedrab2": "rgb(179, 238, 58)",
+ "olivedrab3": "rgb(154, 205, 50)",
+ "olivedrab4": "rgb(105, 139, 34)",
+ "orange": "rgb(255, 165, 0)",
+ "orange1": "rgb(255, 165, 0)",
+ "orange2": "rgb(238, 154, 0)",
+ "orange3": "rgb(205, 133, 0)",
+ "orange4": "rgb(139, 90, 0)",
+ "orangered": "rgb(255, 69, 0)",
+ "orangered1": "rgb(255, 69, 0)",
+ "orangered2": "rgb(238, 64, 0)",
+ "orangered3": "rgb(205, 55, 0)",
+ "orangered4": "rgb(139, 37, 0)",
+ "orchid": "rgb(218, 112, 214)",
+ "orchid1": "rgb(255, 131, 250)",
+ "orchid2": "rgb(238, 122, 233)",
+ "orchid3": "rgb(205, 105, 201)",
+ "orchid4": "rgb(139, 71, 137)",
+ "palegoldenrod": "rgb(238, 232, 170)",
+ "palegreen": "rgb(152, 251, 152)",
+ "palegreen1": "rgb(154, 255, 154)",
+ "palegreen2": "rgb(144, 238, 144)",
+ "palegreen3": "rgb(124, 205, 124)",
+ "palegreen4": "rgb(84, 139, 84)",
+ "paleturquoise": "rgb(175, 238, 238)",
+ "paleturquoise1": "rgb(187, 255, 255)",
+ "paleturquoise2": "rgb(174, 238, 238)",
+ "paleturquoise3": "rgb(150, 205, 205)",
+ "paleturquoise4": "rgb(102, 139, 139)",
+ "palevioletred": "rgb(219, 112, 147)",
+ "palevioletred1": "rgb(255, 130, 171)",
+ "palevioletred2": "rgb(238, 121, 159)",
+ "palevioletred3": "rgb(205, 104, 137)",
+ "palevioletred4": "rgb(139, 71, 93)",
+ "papayawhip": "rgb(255, 239, 213)",
+ "peachpuff": "rgb(255, 218, 185)",
+ "peachpuff1": "rgb(255, 218, 185)",
+ "peachpuff2": "rgb(238, 203, 173)",
+ "peachpuff3": "rgb(205, 175, 149)",
+ "peachpuff4": "rgb(139, 119, 101)",
+ "peru": "rgb(205, 133, 63)",
+ "pink": "rgb(255, 192, 203)",
+ "pink1": "rgb(255, 181, 197)",
+ "pink2": "rgb(238, 169, 184)",
+ "pink3": "rgb(205, 145, 158)",
+ "pink4": "rgb(139, 99, 108)",
+ "plum": "rgb(221, 160, 221)",
+ "plum1": "rgb(255, 187, 255)",
+ "plum2": "rgb(238, 174, 238)",
+ "plum3": "rgb(205, 150, 205)",
+ "plum4": "rgb(139, 102, 139)",
+ "powderblue": "rgb(176, 224, 230)",
+ "purple": "rgb(160, 32, 240)",
+ "purple1": "rgb(155, 48, 255)",
+ "purple2": "rgb(145, 44, 238)",
+ "purple3": "rgb(125, 38, 205)",
+ "purple4": "rgb(85, 26, 139)",
+ "red": "rgb(255, 0, 0)",
+ "red1": "rgb(255, 0, 0)",
+ "red2": "rgb(238, 0, 0)",
+ "red3": "rgb(205, 0, 0)",
+ "red4": "rgb(139, 0, 0)",
+ "rosybrown": "rgb(188, 143, 143)",
+ "rosybrown1": "rgb(255, 193, 193)",
+ "rosybrown2": "rgb(238, 180, 180)",
+ "rosybrown3": "rgb(205, 155, 155)",
+ "rosybrown4": "rgb(139, 105, 105)",
+ "royalblue": "rgb(65, 105, 225)",
+ "royalblue1": "rgb(72, 118, 255)",
+ "royalblue2": "rgb(67, 110, 238)",
+ "royalblue3": "rgb(58, 95, 205)",
+ "royalblue4": "rgb(39, 64, 139)",
+ "saddlebrown": "rgb(139, 69, 19)",
+ "salmon": "rgb(250, 128, 114)",
+ "salmon1": "rgb(255, 140, 105)",
+ "salmon2": "rgb(238, 130, 98)",
+ "salmon3": "rgb(205, 112, 84)",
+ "salmon4": "rgb(139, 76, 57)",
+ "sandybrown": "rgb(244, 164, 96)",
+ "seagreen": "rgb(46, 139, 87)",
+ "seagreen1": "rgb(84, 255, 159)",
+ "seagreen2": "rgb(78, 238, 148)",
+ "seagreen3": "rgb(67, 205, 128)",
+ "seagreen4": "rgb(46, 139, 87)",
+ "seashell": "rgb(255, 245, 238)",
+ "seashell1": "rgb(255, 245, 238)",
+ "seashell2": "rgb(238, 229, 222)",
+ "seashell3": "rgb(205, 197, 191)",
+ "seashell4": "rgb(139, 134, 130)",
+ "sienna": "rgb(160, 82, 45)",
+ "sienna1": "rgb(255, 130, 71)",
+ "sienna2": "rgb(238, 121, 66)",
+ "sienna3": "rgb(205, 104, 57)",
+ "sienna4": "rgb(139, 71, 38)",
+ "skyblue": "rgb(135, 206, 235)",
+ "skyblue1": "rgb(135, 206, 255)",
+ "skyblue2": "rgb(126, 192, 238)",
+ "skyblue3": "rgb(108, 166, 205)",
+ "skyblue4": "rgb(74, 112, 139)",
+ "slateblue": "rgb(106, 90, 205)",
+ "slateblue1": "rgb(131, 111, 255)",
+ "slateblue2": "rgb(122, 103, 238)",
+ "slateblue3": "rgb(105, 89, 205)",
+ "slateblue4": "rgb(71, 60, 139)",
+ "slategray": "rgb(112, 128, 144)",
+ "slategray1": "rgb(198, 226, 255)",
+ "slategray2": "rgb(185, 211, 238)",
+ "slategray3": "rgb(159, 182, 205)",
+ "slategray4": "rgb(108, 123, 139)",
+ "slategrey": "rgb(112, 128, 144)",
+ "snow": "rgb(255, 250, 250)",
+ "snow1": "rgb(255, 250, 250)",
+ "snow2": "rgb(238, 233, 233)",
+ "snow3": "rgb(205, 201, 201)",
+ "snow4": "rgb(139, 137, 137)",
+ "springgreen": "rgb(0, 255, 127)",
+ "springgreen1": "rgb(0, 255, 127)",
+ "springgreen2": "rgb(0, 238, 118)",
+ "springgreen3": "rgb(0, 205, 102)",
+ "springgreen4": "rgb(0, 139, 69)",
+ "steelblue": "rgb(70, 130, 180)",
+ "steelblue1": "rgb(99, 184, 255)",
+ "steelblue2": "rgb(92, 172, 238)",
+ "steelblue3": "rgb(79, 148, 205)",
+ "steelblue4": "rgb(54, 100, 139)",
+ "tan": "rgb(210, 180, 140)",
+ "tan1": "rgb(255, 165, 79)",
+ "tan2": "rgb(238, 154, 73)",
+ "tan3": "rgb(205, 133, 63)",
+ "tan4": "rgb(139, 90, 43)",
+ "thistle": "rgb(216, 191, 216)",
+ "thistle1": "rgb(255, 225, 255)",
+ "thistle2": "rgb(238, 210, 238)",
+ "thistle3": "rgb(205, 181, 205)",
+ "thistle4": "rgb(139, 123, 139)",
+ "tomato": "rgb(255, 99, 71)",
+ "tomato1": "rgb(255, 99, 71)",
+ "tomato2": "rgb(238, 92, 66)",
+ "tomato3": "rgb(205, 79, 57)",
+ "tomato4": "rgb(139, 54, 38)",
+ "turquoise": "rgb(64, 224, 208)",
+ "turquoise1": "rgb(0, 245, 255)",
+ "turquoise2": "rgb(0, 229, 238)",
+ "turquoise3": "rgb(0, 197, 205)",
+ "turquoise4": "rgb(0, 134, 139)",
+ "violet": "rgb(238, 130, 238)",
+ "violetred": "rgb(208, 32, 144)",
+ "violetred1": "rgb(255, 62, 150)",
+ "violetred2": "rgb(238, 58, 140)",
+ "violetred3": "rgb(205, 50, 120)",
+ "violetred4": "rgb(139, 34, 82)",
+ "wheat": "rgb(245, 222, 179)",
+ "wheat1": "rgb(255, 231, 186)",
+ "wheat2": "rgb(238, 216, 174)",
+ "wheat3": "rgb(205, 186, 150)",
+ "wheat4": "rgb(139, 126, 102)",
+ "white": "rgb(255, 255, 255)",
+ "whitesmoke": "rgb(245, 245, 245)",
+ "yellow": "rgb(255, 255, 0)",
+ "yellow1": "rgb(255, 255, 0)",
+ "yellow2": "rgb(238, 238, 0)",
+ "yellow3": "rgb(205, 205, 0)",
+ "yellow4": "rgb(139, 139, 0)",
+ "yellowgreen": "rgb(154, 205, 50)"
+};
+// SOURCE FILE: libdot/js/lib_f.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * Grab bag of utility functions.
+ */
+lib.f = {};
+
+/**
+ * Create a unique enum value.
+ *
+ * @suppress {lintChecks}
+ * @param {string} name A human friendly name for debugging.
+ * @return {Object} A unique enum that won't compare equal to anything else.
+ */
+lib.f.createEnum = function(name) {
+ // We use a String object as nothing else should be using them -- we want to
+ // use string primitives normally. But debuggers will include our name.
+ // eslint-disable-next-line no-new-wrappers
+ return new String(name);
+};
+
+/**
+ * Replace variable references in a string.
+ *
+ * Variables are of the form %FUNCTION(VARNAME). FUNCTION is an optional
+ * escape function to apply to the value.
+ *
+ * For example
+ * lib.f.replaceVars("%(greeting), %encodeURIComponent(name)",
+ * { greeting: "Hello",
+ * name: "Google+" });
+ *
+ * Will result in "Hello, Google%2B".
+ */
+lib.f.replaceVars = function(str, vars) {
+ return str.replace(/%([a-z]*)\(([^\)]+)\)/gi, function(match, fn, varname) {
+ if (typeof vars[varname] == 'undefined')
+ throw 'Unknown variable: ' + varname;
+
+ var rv = vars[varname];
+
+ if (fn in lib.f.replaceVars.functions) {
+ rv = lib.f.replaceVars.functions[fn](rv);
+ } else if (fn) {
+ throw 'Unknown escape function: ' + fn;
+ }
+
+ return rv;
+ });
+};
+
+/**
+ * Functions that can be used with replaceVars.
+ *
+ * Clients can add to this list to extend lib.f.replaceVars().
+ */
+lib.f.replaceVars.functions = {
+ encodeURI: encodeURI,
+ encodeURIComponent: encodeURIComponent,
+ escapeHTML: function(str) {
+ var map = {
+ '<': '<',
+ '>': '>',
+ '&': '&',
+ '"': '"',
+ "'": '''
+ };
+
+ return str.replace(/[<>&\"\']/g, (m) => map[m]);
+ }
+};
+
+/**
+ * Parse a query string into a hash.
+ *
+ * This takes a url query string in the form 'name1=value&name2=value' and
+ * converts it into an object of the form { name1: 'value', name2: 'value' }.
+ * If a given name appears multiple times in the query string, only the
+ * last value will appear in the result. If the name ends with [], it is
+ * turned into an array.
+ *
+ * Names and values are passed through decodeURIComponent before being added
+ * to the result object.
+ *
+ * @param {string} queryString The string to parse. If it starts with a
+ * leading '?', the '?' will be ignored.
+ */
+lib.f.parseQuery = function(queryString) {
+ if (queryString.startsWith('?'))
+ queryString = queryString.substr(1);
+
+ var rv = {};
+
+ var pairs = queryString.split('&');
+ for (var i = 0; i < pairs.length; i++) {
+ var pair = pairs[i].split('=');
+ let key = decodeURIComponent(pair[0]);
+ let val = decodeURIComponent(pair[1]);
+
+ if (key.endsWith('[]')) {
+ // It's an array.
+ key = key.slice(0, -2);
+ // The key doesn't exist, or wasn't an array before.
+ if (!(rv[key] instanceof Array))
+ rv[key] = [];
+ rv[key].push(val);
+ } else {
+ // It's a plain string.
+ rv[key] = val;
+ }
+ }
+
+ return rv;
+};
+
+lib.f.getURL = function(path) {
+ if (lib.f.getURL.chromeSupported())
+ return chrome.runtime.getURL(path);
+
+ return path;
+};
+
+lib.f.getURL.chromeSupported = function() {
+ return window.chrome && chrome.runtime && chrome.runtime.getURL;
+};
+
+/**
+ * Clamp a given integer to a specified range.
+ *
+ * @param {integer} v The value to be clamped.
+ * @param {integer} min The minimum acceptable value.
+ * @param {integer} max The maximum acceptable value.
+ */
+lib.f.clamp = function(v, min, max) {
+ if (v < min)
+ return min;
+ if (v > max)
+ return max;
+ return v;
+};
+
+/**
+ * Left pad a number to a given length with leading zeros.
+ *
+ * @param {string|integer} number The number to pad.
+ * @param {integer} length The desired length.
+ * @return {string} The padded number as a string.
+ */
+lib.f.zpad = function(number, length) {
+ return String(number).padStart(length, '0');
+};
+
+/**
+ * Return a string containing a given number of space characters.
+ *
+ * This method maintains a static cache of the largest amount of whitespace
+ * ever requested. It shouldn't be used to generate an insanely huge amount of
+ * whitespace.
+ *
+ * @param {integer} length The desired amount of whitespace.
+ * @param {string} A string of spaces of the requested length.
+ */
+lib.f.getWhitespace = function(length) {
+ if (length <= 0)
+ return '';
+
+ var f = this.getWhitespace;
+ if (!f.whitespace)
+ f.whitespace = ' ';
+
+ while (length > f.whitespace.length) {
+ f.whitespace += f.whitespace;
+ }
+
+ return f.whitespace.substr(0, length);
+};
+
+ /**
+ * Ensure that a function is called within a certain time limit.
+ *
+ * Simple usage looks like this...
+ *
+ * lib.registerInit(lib.f.alarm(onInit));
+ *
+ * This will log a warning to the console if onInit() is not invoked within
+ * 5 seconds.
+ *
+ * If you're performing some operation that may take longer than 5 seconds you
+ * can pass a duration in milliseconds as the optional second parameter.
+ *
+ * If you pass a string identifier instead of a callback function, you'll get a
+ * wrapper generator rather than a single wrapper. Each call to the
+ * generator will return a wrapped version of the callback wired to
+ * a shared timeout. This is for cases where you want to ensure that at least
+ * one of a set of callbacks is invoked before a timeout expires.
+ *
+ * var alarm = lib.f.alarm('fetch object');
+ * lib.foo.fetchObject(alarm(onSuccess), alarm(onFailure));
+ *
+ * @param {function(*)} callback The function to wrap in an alarm.
+ * @param {int} opt_ms Optional number of milliseconds to wait before raising
+ * an alarm. Default is 5000 (5 seconds).
+ * @return {function} If callback is a function then the return value will be
+ * the wrapped callback. If callback is a string then the return value will
+ * be a function that generates new wrapped callbacks.
+ */
+lib.f.alarm = function(callback, opt_ms) {
+ var ms = opt_ms || 5 * 1000;
+ var stack = lib.f.getStack(1);
+
+ return (function() {
+ // This outer function is called immediately. It's here to capture a new
+ // scope for the timeout variable.
+
+ // The 'timeout' variable is shared by this timeout function, and the
+ // callback wrapper.
+ var timeout = setTimeout(function() {
+ var name = (typeof callback == 'string') ? name : callback.name;
+ name = name ? (': ' + name) : '';
+ console.warn('lib.f.alarm: timeout expired: ' + (ms / 1000) + 's' + name);
+ console.log(stack);
+ timeout = null;
+ }, ms);
+
+ var wrapperGenerator = function(callback) {
+ return function() {
+ if (timeout) {
+ clearTimeout(timeout);
+ timeout = null;
+ }
+
+ return callback.apply(null, arguments);
+ };
+ };
+
+ if (typeof callback == 'string')
+ return wrapperGenerator;
+
+ return wrapperGenerator(callback);
+ })();
+};
+
+/**
+ * Return the current call stack after skipping a given number of frames.
+ *
+ * This method is intended to be used for debugging only. It returns an
+ * Object instead of an Array, because the console stringifies arrays by
+ * default and that's not what we want.
+ *
+ * A typical call might look like...
+ *
+ * console.log('Something wicked this way came', lib.f.getStack());
+ * // Notice the comma ^
+ *
+ * This would print the message to the js console, followed by an object
+ * which can be clicked to reveal the stack.
+ *
+ * @param {number=} ignoreFrames How many inner stack frames to ignore. The
+ * innermost 'getStack' call is always ignored.
+ * @param {number=} count How many frames to return.
+ */
+lib.f.getStack = function(ignoreFrames = 0, count = undefined) {
+ const stackArray = (new Error()).stack.split('\n');
+
+ // Always ignore the Error() object and getStack call itself.
+ // [0] = 'Error'
+ // [1] = ' at Object.lib.f.getStack (file:///.../lib_f.js:267:23)'
+ ignoreFrames += 2;
+
+ const max = stackArray.length - ignoreFrames;
+ if (count === undefined)
+ count = max;
+ else
+ count = lib.f.clamp(count, 0, max);
+
+ // Remove the leading spaces and "at" from each line:
+ // ' at window.onload (file:///.../lib_test.js:11:18)'
+ const stackObject = new Array();
+ for (let i = ignoreFrames; i < count + ignoreFrames; ++i)
+ stackObject.push(stackArray[i].replace(/^\s*at\s+/, ''));
+
+ return stackObject;
+};
+
+/**
+ * Divides the two numbers and floors the results, unless the remainder is less
+ * than an incredibly small value, in which case it returns the ceiling.
+ * This is useful when the number are truncated approximations of longer
+ * values, and so doing division with these numbers yields a result incredibly
+ * close to a whole number.
+ *
+ * @param {number} numerator
+ * @param {number} denominator
+ * @return {number}
+ */
+lib.f.smartFloorDivide = function(numerator, denominator) {
+ var val = numerator / denominator;
+ var ceiling = Math.ceil(val);
+ if (ceiling - val < .0001) {
+ return ceiling;
+ } else {
+ return Math.floor(val);
+ }
+};
+
+/**
+ * Get a random integer in a range (inclusive).
+ *
+ * @param {number} min The lowest integer in the range.
+ * @param {number} max The highest integer in the range.
+ * @return {number} A random number between min & max.
+ */
+lib.f.randomInt = function(min, max) {
+ return Math.floor(Math.random() * (max - min + 1)) + min;
+};
+
+/**
+ * Get the current OS.
+ *
+ * @return {Promise<string>} A promise that resolves to a constant in
+ * runtime.PlatformOs.
+ */
+lib.f.getOs = function() {
+ // Try the brower extensions API.
+ if (window.browser && browser.runtime && browser.runtime.getPlatformInfo)
+ return browser.runtime.getPlatformInfo().then((info) => info.os);
+
+ // Use the native Chrome API if available.
+ if (window.chrome && chrome.runtime && chrome.runtime.getPlatformInfo) {
+ return new Promise((resolve, reject) =>
+ chrome.runtime.getPlatformInfo((info) => resolve(info.os)));
+ }
+
+ // Fallback logic. Capture the major OS's. The rest should support the
+ // browser API above.
+ if (window.navigator && navigator.userAgent) {
+ const ua = navigator.userAgent;
+ if (ua.includes('Mac OS X'))
+ return Promise.resolve('mac');
+ else if (ua.includes('CrOS'))
+ return Promise.resolve('cros');
+ else if (ua.includes('Linux'))
+ return Promise.resolve('linux');
+ else if (ua.includes('Android'))
+ return Promise.resolve('android');
+ else if (ua.includes('Windows'))
+ return Promise.resolve('windows');
+ }
+
+ // Still here? No idea.
+ return Promise.reject(null);
+};
+
+/**
+ * Get the current Chrome milestone version.
+ *
+ * @return {number} The milestone number if we're running on Chrome, else NaN.
+ */
+lib.f.getChromeMilestone = function() {
+ if (window.navigator && navigator.userAgent) {
+ const ary = navigator.userAgent.match(/\sChrome\/(\d+)/);
+ if (ary)
+ return parseInt(ary[1]);
+ }
+
+ // Returning NaN will make all number comparisons fail.
+ return NaN;
+};
+
+/**
+ * Return the lastError string in the browser.
+ *
+ * This object might live in different locations, and it isn't always defined
+ * (if there hasn't been a "last error"). Wrap all that ugliness here.
+ *
+ * @param {string=} defaultMsg The default message if no error is found.
+ * @return {string} The last error message from the browser.
+ */
+lib.f.lastError = function(defaultMsg = null) {
+ let lastError;
+ if (window.browser && browser.runtime)
+ lastError = browser.runtime.lastError;
+ else if (window.chrome && chrome.runtime)
+ lastError = chrome.runtime.lastError;
+
+ if (lastError && lastError.message)
+ return lastError.message;
+ else
+ return defaultMsg;
+};
+
+/**
+ * Just like window.open, but enforce noopener.
+ *
+ * If we're not careful, the website we open will have access to use via its
+ * window.opener field. Newer browser support putting 'noopener' into the
+ * features argument, but there are many which still don't. So hack it.
+ *
+ * @param {string=} url The URL to point the new window to.
+ * @param {string=} name The name of the new window.
+ * @param {string=} features The window features to enable.
+ * @return {Window} The newly opened window.
+ */
+lib.f.openWindow = function(url, name=undefined, features=undefined) {
+ // We create the window first without the URL loaded.
+ const win = window.open(undefined, name, features);
+
+ // If the system is blocking window.open, don't crash.
+ if (win !== null) {
+ // Clear the opener setting before redirecting.
+ win.opener = null;
+
+ // Now it's safe to redirect. Skip this step if the url is not set so we
+ // mimic the window.open behavior more precisely.
+ if (url) {
+ win.location = url;
+ }
+ }
+
+ return win;
+};
+// SOURCE FILE: libdot/js/lib_i18n.js
+// Copyright 2018 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * Wrappers over the browser i18n helpers.
+ *
+ * Arguably some of these functions should be l10n, but oh well.
+ */
+lib.i18n = {};
+
+/**
+ * Convenience shortcut to the browser i18n object.
+ */
+lib.i18n.browser_ =
+ window.browser && browser.i18n ? browser.i18n :
+ window.chrome && chrome.i18n ? chrome.i18n :
+ null;
+
+/**
+ * Get the list of accepted UI languages.
+ *
+ * https://developer.mozilla.org/en-US/Add-ons/WebExtensions/API/i18n/getAcceptLanguages
+ *
+ * @param {function(Array)} callback Function to invoke with the results. The
+ * parameter is a list of locale names.
+ */
+lib.i18n.getAcceptLanguages = function(callback) {
+ if (lib.i18n.browser_) {
+ lib.i18n.browser_.getAcceptLanguages(callback);
+ } else {
+ setTimeout(function() {
+ callback([navigator.language.replace(/-/g, '_')]);
+ }, 0);
+ }
+};
+
+/**
+ * Get a message by name, optionally replacing arguments too.
+ *
+ * https://developer.mozilla.org/en-US/Add-ons/WebExtensions/API/i18n/getMessage
+ *
+ * @param {string} msgname The id for this localized string.
+ * @param {string[]=} substitutions Any replacements in the string.
+ * @param {string=} fallback Translation if the message wasn't found.
+ * @return {string} The translated message.
+ */
+lib.i18n.getMessage = function(msgname, substitutions = [], fallback = '') {
+ // First let the native browser APIs handle everything for us.
+ if (lib.i18n.browser_) {
+ const message = lib.i18n.browser_.getMessage(msgname, substitutions);
+ if (message)
+ return message;
+ }
+
+ // Do our best to get something reasonable.
+ return lib.i18n.replaceReferences(fallback, substitutions);
+};
+
+/**
+ * Replace $1...$n references with the elements of the args array.
+ *
+ * This largely behaves like Chrome's getMessage helper. The $# references are
+ * always replaced/removed regardless of the specified substitutions.
+ *
+ * @param {string} msg String containing the message and argument references.
+ * @param {string[]=} args Array containing the argument values.
+ * @return {string} The message with replacements expanded.
+ */
+lib.i18n.replaceReferences = function(msg, args = []) {
+ // The Chrome API allows a single substitution as a string rather than array.
+ if (args === null) {
+ args = [];
+ }
+ if (!(args instanceof Array)) {
+ args = [args];
+ }
+
+ return msg.replace(/\$(\d+)/g, (m, index) => {
+ return index <= args.length ? args[index - 1] : '';
+ });
+};
+// SOURCE FILE: libdot/js/lib_message_manager.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * MessageManager class handles internationalized strings.
+ *
+ * Note: chrome.i18n isn't sufficient because...
+ * 1. There's a bug in chrome that makes it unavailable in iframes:
+ * https://crbug.com/130200
+ * 2. The client code may not be packaged in a Chrome extension.
+ * 3. The client code may be part of a library packaged in a third-party
+ * Chrome extension.
+ *
+ * @param {Array} languages List of languages to load, in the order they
+ * should be loaded. Newer messages replace older ones. 'en' is
+ * automatically added as the first language if it is not already present.
+ */
+lib.MessageManager = function(languages) {
+ this.languages_ = languages.map((el) => el.replace(/-/g, '_'));
+
+ if (this.languages_.indexOf('en') == -1)
+ this.languages_.unshift('en');
+
+ this.messages = {};
+};
+
+/**
+ * Add message definitions to the message manager.
+ *
+ * This takes an object of the same format of a Chrome messages.json file. See
+ * <https://developer.chrome.com/extensions/i18n-messages>.
+ */
+lib.MessageManager.prototype.addMessages = function(defs) {
+ for (var key in defs) {
+ var def = defs[key];
+
+ if (!def.placeholders) {
+ this.messages[key] = def.message;
+ } else {
+ // Replace "$NAME$" placeholders with "$1", etc.
+ this.messages[key] = def.message.replace(
+ /\$([a-z][^\s\$]+)\$/ig,
+ function(m, name) {
+ return defs[key].placeholders[name.toLowerCase()].content;
+ });
+ }
+ }
+};
+
+/**
+ * Load the first available language message bundle.
+ *
+ * @param {string} pattern A url pattern containing a "$1" where the locale
+ * name should go.
+ * @param {function(Array,Array)} onComplete Function to be called when loading
+ * is complete. The two arrays are the list of successful and failed
+ * locale names. If the first parameter is length 0, no locales were
+ * loaded.
+ */
+lib.MessageManager.prototype.findAndLoadMessages = function(
+ pattern, onComplete) {
+ var languages = this.languages_.concat();
+ var loaded = [];
+ var failed = [];
+
+ function onLanguageComplete(state) {
+ if (state) {
+ loaded = languages.shift();
+ } else {
+ failed = languages.shift();
+ }
+
+ if (languages.length) {
+ tryNextLanguage();
+ } else {
+ onComplete(loaded, failed);
+ }
+ }
+
+ var tryNextLanguage = function() {
+ this.loadMessages(this.replaceReferences(pattern, languages),
+ onLanguageComplete.bind(this, true),
+ onLanguageComplete.bind(this, false));
+ }.bind(this);
+
+ tryNextLanguage();
+};
+
+/**
+ * Load messages from a messages.json file.
+ */
+lib.MessageManager.prototype.loadMessages = function(
+ url, onSuccess, opt_onError) {
+ var xhr = new XMLHttpRequest();
+
+ xhr.onload = () => {
+ this.addMessages(JSON.parse(xhr.responseText));
+ onSuccess();
+ };
+ if (opt_onError)
+ xhr.onerror = () => opt_onError(xhr);
+
+ xhr.open('GET', url);
+ xhr.send();
+};
+
+/**
+ * Per-instance copy of replaceReferences.
+ */
+lib.MessageManager.prototype.replaceReferences = lib.i18n.replaceReferences;
+
+/**
+ * Get a message by name, optionally replacing arguments too.
+ *
+ * @param {string} msgname String containing the name of the message to get.
+ * @param {Array} opt_args Optional array containing the argument values.
+ * @param {string} opt_default Optional value to return if the msgname is not
+ * found. Returns the message name by default.
+ */
+lib.MessageManager.prototype.get = function(msgname, opt_args, opt_default) {
+ // First try the integrated browser getMessage. We prefer that over any
+ // registered messages as only the browser supports translations.
+ let message = lib.i18n.getMessage(msgname, opt_args);
+ if (message)
+ return message;
+
+ // Look it up in the registered cache next.
+ message = this.messages[msgname];
+ if (!message) {
+ console.warn('Unknown message: ' + msgname);
+ message = opt_default === undefined ? msgname : opt_default;
+ // Register the message with the default to avoid multiple warnings.
+ this.messages[msgname] = message;
+ }
+
+ return this.replaceReferences(message, opt_args);
+};
+
+/**
+ * Process all of the "i18n" html attributes found in a given dom fragment.
+ *
+ * The real work happens in processI18nAttribute.
+ */
+lib.MessageManager.prototype.processI18nAttributes = function(dom) {
+ var nodes = dom.querySelectorAll('[i18n]');
+
+ for (var i = 0; i < nodes.length; i++)
+ this.processI18nAttribute(nodes[i]);
+};
+
+/**
+ * Process the "i18n" attribute in the specified node.
+ *
+ * The i18n attribute should contain a JSON object. The keys are taken to
+ * be attribute names, and the values are message names.
+ *
+ * If the JSON object has a "_" (underscore) key, its value is used as the
+ * textContent of the element.
+ *
+ * Message names can refer to other attributes on the same element with by
+ * prefixing with a dollar sign. For example...
+ *
+ * <button id='send-button'
+ * i18n='{"aria-label": "$id", "_": "SEND_BUTTON_LABEL"}'
+ * ></button>
+ *
+ * The aria-label message name will be computed as "SEND_BUTTON_ARIA_LABEL".
+ * Notice that the "id" attribute was appended to the target attribute, and
+ * the result converted to UPPER_AND_UNDER style.
+ */
+lib.MessageManager.prototype.processI18nAttribute = function(node) {
+ // Convert the "lower-and-dashes" attribute names into
+ // "UPPER_AND_UNDER" style.
+ const thunk = (str) => str.replace(/-/g, '_').toUpperCase();
+
+ var i18n = node.getAttribute('i18n');
+ if (!i18n)
+ return;
+
+ try {
+ i18n = JSON.parse(i18n);
+ } catch (ex) {
+ console.error('Can\'t parse ' + node.tagName + '#' + node.id + ': ' + i18n);
+ throw ex;
+ }
+
+ // Load all the messages specified in the i18n attributes.
+ for (var key in i18n) {
+ // The node attribute we'll be setting.
+ var attr = key;
+
+ var msgname = i18n[key];
+ // For "=foo", re-use the referenced message name.
+ if (msgname.startsWith('=')) {
+ key = msgname.substr(1);
+ msgname = i18n[key];
+ }
+
+ // For "$foo", calculate the message name.
+ if (msgname.startsWith('$'))
+ msgname = thunk(node.getAttribute(msgname.substr(1)) + '_' + key);
+
+ // Finally load the message.
+ var msg = this.get(msgname);
+ if (attr == '_')
+ node.textContent = msg;
+ else
+ node.setAttribute(attr, msg);
+ }
+};
+// SOURCE FILE: libdot/js/lib_preference_manager.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * Constructor for lib.PreferenceManager objects.
+ *
+ * These objects deal with persisting changes to stable storage and notifying
+ * consumers when preferences change.
+ *
+ * It is intended that the backing store could be something other than HTML5
+ * storage, but there aren't any use cases at the moment. In the future there
+ * may be a chrome api to store sync-able name/value pairs, and we'd want
+ * that.
+ *
+ * @param {lib.Storage.*} storage The storage object to use as a backing
+ * store.
+ * @param {string} opt_prefix The optional prefix to be used for all preference
+ * names. The '/' character should be used to separate levels of hierarchy,
+ * if you're going to have that kind of thing. If provided, the prefix
+ * should start with a '/'. If not provided, it defaults to '/'.
+ */
+lib.PreferenceManager = function(storage, opt_prefix) {
+ this.storage = storage;
+ this.storageObserver_ = this.onStorageChange_.bind(this);
+
+ this.isActive_ = false;
+ this.activate();
+
+ this.trace = false;
+
+ var prefix = opt_prefix || '/';
+ if (!prefix.endsWith('/'))
+ prefix += '/';
+
+ this.prefix = prefix;
+
+ // Internal state for when we're doing a bulk import from JSON and we want
+ // to elide redundant storage writes (for quota reasons).
+ this.isImportingJson_ = false;
+
+ this.prefRecords_ = {};
+ this.globalObservers_ = [];
+
+ this.childFactories_ = {};
+
+ // Map of list-name to {map of child pref managers}
+ // As in...
+ //
+ // this.childLists_ = {
+ // 'profile-ids': {
+ // 'one': PreferenceManager,
+ // 'two': PreferenceManager,
+ // ...
+ // },
+ //
+ // 'frob-ids': {
+ // ...
+ // }
+ // }
+ this.childLists_ = {};
+};
+
+/**
+ * Used internally to indicate that the current value of the preference should
+ * be taken from the default value defined with the preference.
+ *
+ * Equality tests against this value MUST use '===' or '!==' to be accurate.
+ */
+lib.PreferenceManager.prototype.DEFAULT_VALUE = lib.f.createEnum('DEFAULT');
+
+/**
+ * An individual preference.
+ *
+ * These objects are managed by the PreferenceManager, you shouldn't need to
+ * handle them directly.
+ */
+lib.PreferenceManager.Record = function(name, defaultValue) {
+ this.name = name;
+ this.defaultValue = defaultValue;
+ this.currentValue = this.DEFAULT_VALUE;
+ this.observers = [];
+};
+
+/**
+ * A local copy of the DEFAULT_VALUE constant to make it less verbose.
+ */
+lib.PreferenceManager.Record.prototype.DEFAULT_VALUE =
+ lib.PreferenceManager.prototype.DEFAULT_VALUE;
+
+/**
+ * Register a callback to be invoked when this preference changes.
+ *
+ * @param {function(value, string, lib.PreferenceManager} observer The function
+ * to invoke. It will receive the new value, the name of the preference,
+ * and a reference to the PreferenceManager as parameters.
+ */
+lib.PreferenceManager.Record.prototype.addObserver = function(observer) {
+ this.observers.push(observer);
+};
+
+/**
+ * Unregister an observer callback.
+ *
+ * @param {function} observer A previously registered callback.
+ */
+lib.PreferenceManager.Record.prototype.removeObserver = function(observer) {
+ var i = this.observers.indexOf(observer);
+ if (i >= 0)
+ this.observers.splice(i, 1);
+};
+
+/**
+ * Fetch the value of this preference.
+ */
+lib.PreferenceManager.Record.prototype.get = function() {
+ if (this.currentValue === this.DEFAULT_VALUE) {
+ if (/^(string|number)$/.test(typeof this.defaultValue))
+ return this.defaultValue;
+
+ if (typeof this.defaultValue == 'object') {
+ // We want to return a COPY of the default value so that users can
+ // modify the array or object without changing the default value.
+ return JSON.parse(JSON.stringify(this.defaultValue));
+ }
+
+ return this.defaultValue;
+ }
+
+ return this.currentValue;
+};
+
+/**
+ * Stop this preference manager from tracking storage changes.
+ *
+ * Call this if you're going to swap out one preference manager for another so
+ * that you don't get notified about irrelevant changes.
+ */
+lib.PreferenceManager.prototype.deactivate = function() {
+ if (!this.isActive_)
+ throw new Error('Not activated');
+
+ this.isActive_ = false;
+ this.storage.removeObserver(this.storageObserver_);
+};
+
+/**
+ * Start tracking storage changes.
+ *
+ * If you previously deactivated this preference manager, you can reactivate it
+ * with this method. You don't need to call this at initialization time, as
+ * it's automatically called as part of the constructor.
+ */
+lib.PreferenceManager.prototype.activate = function() {
+ if (this.isActive_)
+ throw new Error('Already activated');
+
+ this.isActive_ = true;
+ this.storage.addObserver(this.storageObserver_);
+};
+
+/**
+ * Read the backing storage for these preferences.
+ *
+ * You should do this once at initialization time to prime the local cache
+ * of preference values. The preference manager will monitor the backing
+ * storage for changes, so you should not need to call this more than once.
+ *
+ * This function recursively reads storage for all child preference managers as
+ * well.
+ *
+ * This function is asynchronous, if you need to read preference values, you
+ * *must* wait for the callback.
+ *
+ * @param {function()} opt_callback Optional function to invoke when the read
+ * has completed.
+ */
+lib.PreferenceManager.prototype.readStorage = function(opt_callback) {
+ var pendingChildren = 0;
+
+ function onChildComplete() {
+ if (--pendingChildren == 0 && opt_callback)
+ opt_callback();
+ }
+
+ var keys = Object.keys(this.prefRecords_).map((el) => this.prefix + el);
+
+ if (this.trace)
+ console.log('Preferences read: ' + this.prefix);
+
+ this.storage.getItems(keys, function(items) {
+ var prefixLength = this.prefix.length;
+
+ for (var key in items) {
+ var value = items[key];
+ var name = key.substr(prefixLength);
+ var needSync = (name in this.childLists_ &&
+ (JSON.stringify(value) !=
+ JSON.stringify(this.prefRecords_[name].currentValue)));
+
+ this.prefRecords_[name].currentValue = value;
+
+ if (needSync) {
+ pendingChildren++;
+ this.syncChildList(name, onChildComplete);
+ }
+ }
+
+ if (pendingChildren == 0 && opt_callback)
+ setTimeout(opt_callback);
+ }.bind(this));
+};
+
+/**
+ * Define a preference.
+ *
+ * This registers a name, default value, and onChange handler for a preference.
+ *
+ * @param {string} name The name of the preference. This will be prefixed by
+ * the prefix of this PreferenceManager before written to local storage.
+ * @param {string|number|boolean|Object|Array|null} value The default value of
+ * this preference. Anything that can be represented in JSON is a valid
+ * default value.
+ * @param {function(value, string, lib.PreferenceManager} opt_observer A
+ * function to invoke when the preference changes. It will receive the new
+ * value, the name of the preference, and a reference to the
+ * PreferenceManager as parameters.
+ */
+lib.PreferenceManager.prototype.definePreference = function(
+ name, value, opt_onChange) {
+
+ var record = this.prefRecords_[name];
+ if (record) {
+ this.changeDefault(name, value);
+ } else {
+ record = this.prefRecords_[name] =
+ new lib.PreferenceManager.Record(name, value);
+ }
+
+ if (opt_onChange)
+ record.addObserver(opt_onChange);
+};
+
+/**
+ * Define multiple preferences with a single function call.
+ *
+ * @param {Array} defaults An array of 3-element arrays. Each three element
+ * array should contain the [key, value, onChange] parameters for a
+ * preference.
+ */
+lib.PreferenceManager.prototype.definePreferences = function(defaults) {
+ for (var i = 0; i < defaults.length; i++) {
+ this.definePreference(defaults[i][0], defaults[i][1], defaults[i][2]);
+ }
+};
+
+/**
+ * Define an ordered list of child preferences.
+ *
+ * Child preferences are different from just storing an array of JSON objects
+ * in that each child is an instance of a preference manager. This means you
+ * can observe changes to individual child preferences, and get some validation
+ * that you're not reading or writing to an undefined child preference value.
+ *
+ * @param {string} listName A name for the list of children. This must be
+ * unique in this preference manager. The listName will become a
+ * preference on this PreferenceManager used to store the ordered list of
+ * child ids. It is also used in get/add/remove operations to identify the
+ * list of children to operate on.
+ * @param {function} childFactory A function that will be used to generate
+ * instances of these children. The factory function will receive the
+ * parent lib.PreferenceManager object and a unique id for the new child
+ * preferences.
+ */
+lib.PreferenceManager.prototype.defineChildren = function(
+ listName, childFactory) {
+
+ // Define a preference to hold the ordered list of child ids.
+ this.definePreference(listName, [],
+ this.onChildListChange_.bind(this, listName));
+ this.childFactories_[listName] = childFactory;
+ this.childLists_[listName] = {};
+};
+
+/**
+ * Register to observe preference changes.
+ *
+ * @param {Function} global A callback that will happen for every preference.
+ * Pass null if you don't need one.
+ * @param {Object} map A map of preference specific callbacks. Pass null if
+ * you don't need any.
+ */
+lib.PreferenceManager.prototype.addObservers = function(global, map) {
+ if (global && typeof global != 'function')
+ throw new Error('Invalid param: globals');
+
+ if (global)
+ this.globalObservers_.push(global);
+
+ if (!map)
+ return;
+
+ for (var name in map) {
+ if (!(name in this.prefRecords_))
+ throw new Error('Unknown preference: ' + name);
+
+ this.prefRecords_[name].addObserver(map[name]);
+ }
+};
+
+/**
+ * Dispatch the change observers for all known preferences.
+ *
+ * It may be useful to call this after readStorage completes, in order to
+ * get application state in sync with user preferences.
+ *
+ * This can be used if you've changed a preference manager out from under
+ * a live object, for example when switching to a different prefix.
+ */
+lib.PreferenceManager.prototype.notifyAll = function() {
+ for (var name in this.prefRecords_) {
+ this.notifyChange_(name);
+ }
+};
+
+/**
+ * Notify the change observers for a given preference.
+ *
+ * @param {string} name The name of the preference that changed.
+ */
+lib.PreferenceManager.prototype.notifyChange_ = function(name) {
+ var record = this.prefRecords_[name];
+ if (!record)
+ throw new Error('Unknown preference: ' + name);
+
+ var currentValue = record.get();
+
+ for (var i = 0; i < this.globalObservers_.length; i++)
+ this.globalObservers_[i](name, currentValue);
+
+ for (var i = 0; i < record.observers.length; i++) {
+ record.observers[i](currentValue, name, this);
+ }
+};
+
+/**
+ * Create a new child PreferenceManager for the given child list.
+ *
+ * The optional hint parameter is an opaque prefix added to the auto-generated
+ * unique id for this child. Your child factory can parse out the prefix
+ * and use it.
+ *
+ * @param {string} listName The child list to create the new instance from.
+ * @param {string} opt_hint Optional hint to include in the child id.
+ * @param {string} opt_id Optional id to override the generated id.
+ */
+lib.PreferenceManager.prototype.createChild = function(listName, opt_hint,
+ opt_id) {
+ var ids = this.get(listName);
+ var id;
+
+ if (opt_id) {
+ id = opt_id;
+ if (ids.indexOf(id) != -1)
+ throw new Error('Duplicate child: ' + listName + ': ' + id);
+
+ } else {
+ // Pick a random, unique 4-digit hex identifier for the new profile.
+ while (!id || ids.indexOf(id) != -1) {
+ id = lib.f.randomInt(1, 0xffff).toString(16);
+ id = lib.f.zpad(id, 4);
+ if (opt_hint)
+ id = opt_hint + ':' + id;
+ }
+ }
+
+ var childManager = this.childFactories_[listName](this, id);
+ childManager.trace = this.trace;
+ childManager.resetAll();
+
+ this.childLists_[listName][id] = childManager;
+
+ ids.push(id);
+ this.set(listName, ids, undefined, !this.isImportingJson_);
+
+ return childManager;
+};
+
+/**
+ * Remove a child preferences instance.
+ *
+ * Removes a child preference manager and clears any preferences stored in it.
+ *
+ * @param {string} listName The name of the child list containing the child to
+ * remove.
+ * @param {string} id The child ID.
+ */
+lib.PreferenceManager.prototype.removeChild = function(listName, id) {
+ var prefs = this.getChild(listName, id);
+ prefs.resetAll();
+
+ var ids = this.get(listName);
+ var i = ids.indexOf(id);
+ if (i != -1) {
+ ids.splice(i, 1);
+ this.set(listName, ids, undefined, !this.isImportingJson_);
+ }
+
+ delete this.childLists_[listName][id];
+};
+
+/**
+ * Return a child PreferenceManager instance for a given id.
+ *
+ * If the child list or child id is not known this will return the specified
+ * default value or throw an exception if no default value is provided.
+ *
+ * @param {string} listName The child list to look in.
+ * @param {string} id The child ID.
+ * @param {*} opt_default The optional default value to return if the child
+ * is not found.
+ */
+lib.PreferenceManager.prototype.getChild = function(listName, id, opt_default) {
+ if (!(listName in this.childLists_))
+ throw new Error('Unknown child list: ' + listName);
+
+ var childList = this.childLists_[listName];
+ if (!(id in childList)) {
+ if (typeof opt_default == 'undefined')
+ throw new Error('Unknown "' + listName + '" child: ' + id);
+
+ return opt_default;
+ }
+
+ return childList[id];
+};
+
+/**
+ * Calculate the difference between two lists of child ids.
+ *
+ * Given two arrays of child ids, this function will return an object
+ * with "added", "removed", and "common" properties. Each property is
+ * a map of child-id to `true`. For example, given...
+ *
+ * a = ['child-x', 'child-y']
+ * b = ['child-y']
+ *
+ * diffChildLists(a, b) =>
+ * { added: { 'child-x': true }, removed: {}, common: { 'child-y': true } }
+ *
+ * The added/removed properties assume that `a` is the current list.
+ *
+ * @param {Array[string]} a The most recent list of child ids.
+ * @param {Array[string]} b An older list of child ids.
+ * @return {Object} An object with added/removed/common properties.
+ */
+lib.PreferenceManager.diffChildLists = function(a, b) {
+ var rv = {
+ added: {},
+ removed: {},
+ common: {},
+ };
+
+ for (var i = 0; i < a.length; i++) {
+ if (b.indexOf(a[i]) != -1) {
+ rv.common[a[i]] = true;
+ } else {
+ rv.added[a[i]] = true;
+ }
+ }
+
+ for (var i = 0; i < b.length; i++) {
+ if ((b[i] in rv.added) || (b[i] in rv.common))
+ continue;
+
+ rv.removed[b[i]] = true;
+ }
+
+ return rv;
+};
+
+/**
+ * Synchronize a list of child PreferenceManagers instances with the current
+ * list stored in prefs.
+ *
+ * This will instantiate any missing managers and read current preference values
+ * from storage. Any active managers that no longer appear in preferences will
+ * be deleted.
+ *
+ * @param {string} listName The child list to synchronize.
+ * @param {function()} opt_callback Optional function to invoke when the sync
+ * is complete.
+ */
+lib.PreferenceManager.prototype.syncChildList = function(
+ listName, opt_callback) {
+
+ var pendingChildren = 0;
+ function onChildStorage() {
+ if (--pendingChildren == 0 && opt_callback)
+ opt_callback();
+ }
+
+ // The list of child ids that we *should* have a manager for.
+ var currentIds = this.get(listName);
+
+ // The known managers at the start of the sync. Any manager still in this
+ // list at the end should be discarded.
+ var oldIds = Object.keys(this.childLists_[listName]);
+
+ var rv = lib.PreferenceManager.diffChildLists(currentIds, oldIds);
+
+ for (var i = 0; i < currentIds.length; i++) {
+ var id = currentIds[i];
+
+ var managerIndex = oldIds.indexOf(id);
+ if (managerIndex >= 0)
+ oldIds.splice(managerIndex, 1);
+
+ if (!this.childLists_[listName][id]) {
+ var childManager = this.childFactories_[listName](this, id);
+ if (!childManager) {
+ console.warn('Unable to restore child: ' + listName + ': ' + id);
+ continue;
+ }
+
+ childManager.trace = this.trace;
+ this.childLists_[listName][id] = childManager;
+ pendingChildren++;
+ childManager.readStorage(onChildStorage);
+ }
+ }
+
+ for (var i = 0; i < oldIds.length; i++) {
+ delete this.childLists_[listName][oldIds[i]];
+ }
+
+ if (!pendingChildren && opt_callback)
+ setTimeout(opt_callback);
+};
+
+/**
+ * Reset a preference to its default state.
+ *
+ * This will dispatch the onChange handler if the preference value actually
+ * changes.
+ *
+ * @param {string} name The preference to reset.
+ */
+lib.PreferenceManager.prototype.reset = function(name) {
+ var record = this.prefRecords_[name];
+ if (!record)
+ throw new Error('Unknown preference: ' + name);
+
+ this.storage.removeItem(this.prefix + name);
+
+ if (record.currentValue !== this.DEFAULT_VALUE) {
+ record.currentValue = this.DEFAULT_VALUE;
+ this.notifyChange_(name);
+ }
+};
+
+/**
+ * Reset all preferences back to their default state.
+ */
+lib.PreferenceManager.prototype.resetAll = function() {
+ var changed = [];
+
+ for (var listName in this.childLists_) {
+ var childList = this.childLists_[listName];
+ for (var id in childList) {
+ childList[id].resetAll();
+ }
+ }
+
+ for (var name in this.prefRecords_) {
+ if (this.prefRecords_[name].currentValue !== this.DEFAULT_VALUE) {
+ this.prefRecords_[name].currentValue = this.DEFAULT_VALUE;
+ changed.push(name);
+ }
+ }
+
+ var keys = Object.keys(this.prefRecords_).map(function(el) {
+ return this.prefix + el;
+ }.bind(this));
+
+ this.storage.removeItems(keys);
+
+ changed.forEach(this.notifyChange_.bind(this));
+};
+
+/**
+ * Return true if two values should be considered not-equal.
+ *
+ * If both values are the same scalar type and compare equal this function
+ * returns false (no difference), otherwise return true.
+ *
+ * This is used in places where we want to check if a preference has changed.
+ * Rather than take the time to compare complex values we just consider them
+ * to always be different.
+ *
+ * @param {*} a A value to compare.
+ * @param {*} b A value to compare.
+ */
+lib.PreferenceManager.prototype.diff = function(a, b) {
+ // If the types are different.
+ if ((typeof a) !== (typeof b)) {
+ return true;
+ }
+
+ // Or if the type is not a simple primitive one.
+ if (!(/^(undefined|boolean|number|string)$/.test(typeof a))) {
+ // Special case the null object.
+ if (a === null && b === null) {
+ return false;
+ } else {
+ return true;
+ }
+ }
+
+ // Do a normal compare for primitive types.
+ return a !== b;
+};
+
+/**
+ * Change the default value of a preference.
+ *
+ * This is useful when subclassing preference managers.
+ *
+ * The function does not alter the current value of the preference, unless
+ * it has the old default value. When that happens, the change observers
+ * will be notified.
+ *
+ * @param {string} name The name of the parameter to change.
+ * @param {*} newValue The new default value for the preference.
+ */
+lib.PreferenceManager.prototype.changeDefault = function(name, newValue) {
+ var record = this.prefRecords_[name];
+ if (!record)
+ throw new Error('Unknown preference: ' + name);
+
+ if (!this.diff(record.defaultValue, newValue)) {
+ // Default value hasn't changed.
+ return;
+ }
+
+ if (record.currentValue !== this.DEFAULT_VALUE) {
+ // This pref has a specific value, just change the default and we're done.
+ record.defaultValue = newValue;
+ return;
+ }
+
+ record.defaultValue = newValue;
+
+ this.notifyChange_(name);
+};
+
+/**
+ * Change the default value of multiple preferences.
+ *
+ * @param {Object} map A map of name -> value pairs specifying the new default
+ * values.
+ */
+lib.PreferenceManager.prototype.changeDefaults = function(map) {
+ for (var key in map) {
+ this.changeDefault(key, map[key]);
+ }
+};
+
+/**
+ * Set a preference to a specific value.
+ *
+ * This will dispatch the onChange handler if the preference value actually
+ * changes.
+ *
+ * @param {string} name The preference to set.
+ * @param {*} newValue The value to set. Anything that can be represented in
+ * JSON is a valid value.
+ * @param {function()=} onComplete Callback when the set call completes.
+ * @param {boolean=} saveToStorage Whether to commit the change to the backing
+ * storage or only the in-memory record copy.
+ */
+lib.PreferenceManager.prototype.set = function(
+ name, newValue, onComplete=undefined, saveToStorage=true) {
+ var record = this.prefRecords_[name];
+ if (!record)
+ throw new Error('Unknown preference: ' + name);
+
+ var oldValue = record.get();
+
+ if (!this.diff(oldValue, newValue))
+ return;
+
+ if (this.diff(record.defaultValue, newValue)) {
+ record.currentValue = newValue;
+ if (saveToStorage)
+ this.storage.setItem(this.prefix + name, newValue, onComplete);
+ } else {
+ record.currentValue = this.DEFAULT_VALUE;
+ if (saveToStorage)
+ this.storage.removeItem(this.prefix + name, onComplete);
+ }
+
+ // We need to manually send out the notification on this instance. If we
+ // The storage event won't fire a notification because we've already changed
+ // the currentValue, so it won't see a difference. If we delayed changing
+ // currentValue until the storage event, a pref read immediately after a write
+ // would return the previous value.
+ //
+ // The notification is in a timeout so clients don't accidentally depend on
+ // a synchronous notification.
+ setTimeout(this.notifyChange_.bind(this, name), 0);
+};
+
+/**
+ * Get the value of a preference.
+ *
+ * @param {string} key The preference to get.
+ */
+lib.PreferenceManager.prototype.get = function(name) {
+ var record = this.prefRecords_[name];
+ if (!record)
+ throw new Error('Unknown preference: ' + name);
+
+ return record.get();
+};
+
+/**
+ * Return all non-default preferences as a JSON object.
+ *
+ * This includes any nested preference managers as well.
+ */
+lib.PreferenceManager.prototype.exportAsJson = function() {
+ var rv = {};
+
+ for (var name in this.prefRecords_) {
+ if (name in this.childLists_) {
+ rv[name] = [];
+ var childIds = this.get(name);
+ for (var i = 0; i < childIds.length; i++) {
+ var id = childIds[i];
+ rv[name].push({id: id, json: this.getChild(name, id).exportAsJson()});
+ }
+
+ } else {
+ var record = this.prefRecords_[name];
+ if (record.currentValue != this.DEFAULT_VALUE)
+ rv[name] = record.currentValue;
+ }
+ }
+
+ return rv;
+};
+
+/**
+ * Import a JSON blob of preferences previously generated with exportAsJson.
+ *
+ * This will create nested preference managers as well.
+ */
+lib.PreferenceManager.prototype.importFromJson = function(json, opt_onComplete) {
+ this.isImportingJson_ = true;
+
+ let pendingWrites = 0;
+ const onWriteStorage = () => {
+ if (--pendingWrites < 1) {
+ if (opt_onComplete)
+ opt_onComplete();
+
+ // We've delayed updates to the child arrays, so flush them now.
+ for (let name in json)
+ if (name in this.childLists_)
+ this.set(name, this.get(name));
+
+ this.isImportingJson_ = false;
+ }
+ };
+
+ for (var name in json) {
+ if (name in this.childLists_) {
+ var childList = json[name];
+ for (var i = 0; i < childList.length; i++) {
+ var id = childList[i].id;
+
+ var childPrefManager = this.childLists_[name][id];
+ if (!childPrefManager)
+ childPrefManager = this.createChild(name, null, id);
+
+ childPrefManager.importFromJson(childList[i].json, onWriteStorage);
+ pendingWrites++;
+ }
+
+ } else {
+ // The set is synchronous.
+ this.set(name, json[name]);
+ }
+ }
+
+ // If we didn't update any children, no async work has been queued, so make
+ // the completion callback directly.
+ if (pendingWrites == 0 && opt_onComplete)
+ opt_onComplete();
+};
+
+/**
+ * Called when one of the child list preferences changes.
+ */
+lib.PreferenceManager.prototype.onChildListChange_ = function(listName) {
+ this.syncChildList(listName);
+};
+
+/**
+ * Called when a key in the storage changes.
+ */
+lib.PreferenceManager.prototype.onStorageChange_ = function(map) {
+ for (var key in map) {
+ if (this.prefix) {
+ if (key.lastIndexOf(this.prefix, 0) != 0)
+ continue;
+ }
+
+ var name = key.substr(this.prefix.length);
+
+ if (!(name in this.prefRecords_)) {
+ // Sometimes we'll get notified about prefs that are no longer defined.
+ continue;
+ }
+
+ var record = this.prefRecords_[name];
+
+ var newValue = map[key].newValue;
+ var currentValue = record.currentValue;
+ if (currentValue === record.DEFAULT_VALUE)
+ currentValue = (void 0);
+
+ if (this.diff(currentValue, newValue)) {
+ if (typeof newValue == 'undefined' || newValue === null) {
+ record.currentValue = record.DEFAULT_VALUE;
+ } else {
+ record.currentValue = newValue;
+ }
+
+ this.notifyChange_(name);
+ }
+ }
+};
+// SOURCE FILE: libdot/js/lib_resource.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * Storage for canned resources.
+ *
+ * These are usually non-JavaScript things that are collected during a build
+ * step and converted into a series of 'lib.resource.add(...)' calls. See
+ * the "@resource" directive from libdot/bin/concat for the canonical use
+ * case.
+ *
+ * This is global storage, so you should prefix your resource names to avoid
+ * collisions.
+ */
+lib.resource = {
+ resources_: {}
+};
+
+/**
+ * Add a resource.
+ *
+ * @param {string} name A name for the resource. You should prefix this to
+ * avoid collisions with resources from a shared library.
+ * @param {string} type A mime type for the resource, or "raw" if not
+ * applicable.
+ * @param {*} data The value of the resource.
+ */
+lib.resource.add = function(name, type, data) {
+ lib.resource.resources_[name] = {
+ type: type,
+ name: name,
+ data: data
+ };
+};
+
+/**
+ * Retrieve a resource record.
+ *
+ * The resource data is stored on the "data" property of the returned object.
+ *
+ * @param {string} name The name of the resource to get.
+ * @param {*} opt_defaultValue The optional value to return if the resource is
+ * not defined.
+ * @return {object} An object with "type", "name", and "data" properties.
+ */
+lib.resource.get = function(name, opt_defaultValue) {
+ if (!(name in lib.resource.resources_)) {
+ if (typeof opt_defaultValue == 'undefined')
+ throw 'Unknown resource: ' + name;
+
+ return opt_defaultValue;
+ }
+
+ return lib.resource.resources_[name];
+};
+
+/**
+ * Retrieve resource data.
+ *
+ * @param {string} name The name of the resource to get.
+ * @param {*} opt_defaultValue The optional value to return if the resource is
+ * not defined.
+ * @return {*} The resource data.
+ */
+lib.resource.getData = function(name, opt_defaultValue) {
+ if (!(name in lib.resource.resources_)) {
+ if (typeof opt_defaultValue == 'undefined')
+ throw 'Unknown resource: ' + name;
+
+ return opt_defaultValue;
+ }
+
+ return lib.resource.resources_[name].data;
+};
+
+/**
+ * Retrieve resource as a data: url.
+ *
+ * @param {string} name The name of the resource to get.
+ * @param {*} opt_defaultValue The optional value to return if the resource is
+ * not defined.
+ * @return {*} A data: url encoded version of the resource.
+ */
+lib.resource.getDataUrl = function(name, opt_defaultValue) {
+ var resource = lib.resource.get(name, opt_defaultValue);
+ return 'data:' + resource.type + ',' + resource.data;
+};
+// SOURCE FILE: libdot/js/lib_storage.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * Namespace for implementations of persistent, possibly cloud-backed
+ * storage.
+ */
+lib.Storage = new Object();
+// SOURCE FILE: libdot/js/lib_storage_chrome.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * chrome.storage based class with an async interface that is interchangeable
+ * with other lib.Storage.* implementations.
+ */
+lib.Storage.Chrome = function(storage) {
+ this.storage_ = storage;
+ this.observers_ = [];
+
+ chrome.storage.onChanged.addListener(this.onChanged_.bind(this));
+};
+
+/**
+ * Called by the storage implementation when the storage is modified.
+ */
+lib.Storage.Chrome.prototype.onChanged_ = function(changes, areaname) {
+ if (chrome.storage[areaname] != this.storage_)
+ return;
+
+ for (var i = 0; i < this.observers_.length; i++) {
+ this.observers_[i](changes);
+ }
+};
+
+/**
+ * Register a function to observe storage changes.
+ *
+ * @param {function(map)} callback The function to invoke when the storage
+ * changes.
+ */
+lib.Storage.Chrome.prototype.addObserver = function(callback) {
+ this.observers_.push(callback);
+};
+
+/**
+ * Unregister a change observer.
+ *
+ * @param {function} observer A previously registered callback.
+ */
+lib.Storage.Chrome.prototype.removeObserver = function(callback) {
+ var i = this.observers_.indexOf(callback);
+ if (i != -1)
+ this.observers_.splice(i, 1);
+};
+
+/**
+ * Delete everything in this storage.
+ *
+ * @param {function(map)} callback The function to invoke when the delete
+ * has completed.
+ */
+lib.Storage.Chrome.prototype.clear = function(opt_callback) {
+ this.storage_.clear();
+
+ if (opt_callback)
+ setTimeout(opt_callback, 0);
+};
+
+/**
+ * Return the current value of a storage item.
+ *
+ * @param {string} key The key to look up.
+ * @param {function(value) callback The function to invoke when the value has
+ * been retrieved.
+ */
+lib.Storage.Chrome.prototype.getItem = function(key, callback) {
+ this.storage_.get(key, callback);
+};
+/**
+ * Fetch the values of multiple storage items.
+ *
+ * @param {Array} keys The keys to look up.
+ * @param {function(map) callback The function to invoke when the values have
+ * been retrieved.
+ */
+
+lib.Storage.Chrome.prototype.getItems = function(keys, callback) {
+ this.storage_.get(keys, callback);
+};
+
+/**
+ * Set a value in storage.
+ *
+ * @param {string} key The key for the value to be stored.
+ * @param {*} value The value to be stored. Anything that can be serialized
+ * with JSON is acceptable.
+ * @param {function()} opt_callback Optional function to invoke when the
+ * set is complete. You don't have to wait for the set to complete in order
+ * to read the value, since the local cache is updated synchronously.
+ */
+lib.Storage.Chrome.prototype.setItem = function(key, value, opt_callback) {
+ const onComplete = () => {
+ const err = lib.f.lastError();
+ if (err) {
+ // Doesn't seem to be any better way of handling this.
+ // https://crbug.com/764759
+ if (err.indexOf('MAX_WRITE_OPERATIONS')) {
+ console.warn(`Will retry save of ${key} after exceeding quota: ${err}`);
+ setTimeout(() => this.setItem(key, value, onComplete), 1000);
+ return;
+ } else {
+ console.error(`Unknown runtime error: ${err}`);
+ }
+ }
+
+ if (opt_callback)
+ opt_callback();
+ };
+
+ var obj = {};
+ obj[key] = value;
+ this.storage_.set(obj, onComplete);
+};
+
+/**
+ * Set multiple values in storage.
+ *
+ * @param {Object} map A map of key/values to set in storage.
+ * @param {function()} opt_callback Optional function to invoke when the
+ * set is complete. You don't have to wait for the set to complete in order
+ * to read the value, since the local cache is updated synchronously.
+ */
+lib.Storage.Chrome.prototype.setItems = function(obj, opt_callback) {
+ this.storage_.set(obj, opt_callback);
+};
+
+/**
+ * Remove an item from storage.
+ *
+ * @param {string} key The key to be removed.
+ * @param {function()} opt_callback Optional function to invoke when the
+ * remove is complete. You don't have to wait for the set to complete in
+ * order to read the value, since the local cache is updated synchronously.
+ */
+lib.Storage.Chrome.prototype.removeItem = function(key, opt_callback) {
+ this.storage_.remove(key, opt_callback);
+};
+
+/**
+ * Remove multiple items from storage.
+ *
+ * @param {Array} keys The keys to be removed.
+ * @param {function()} opt_callback Optional function to invoke when the
+ * remove is complete. You don't have to wait for the set to complete in
+ * order to read the value, since the local cache is updated synchronously.
+ */
+lib.Storage.Chrome.prototype.removeItems = function(keys, opt_callback) {
+ this.storage_.remove(keys, opt_callback);
+};
+// SOURCE FILE: libdot/js/lib_storage_local.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * window.localStorage based class with an async interface that is
+ * interchangeable with other lib.Storage.* implementations.
+ */
+lib.Storage.Local = function() {
+ this.observers_ = [];
+ this.storage_ = window.localStorage;
+ window.addEventListener('storage', this.onStorage_.bind(this));
+};
+
+/**
+ * Called by the storage implementation when the storage is modified.
+ */
+lib.Storage.Local.prototype.onStorage_ = function(e) {
+ if (e.storageArea != this.storage_)
+ return;
+
+ // JS throws an exception if JSON.parse is given an empty string. So here we
+ // only parse if the value is truthy. This mean the empty string, undefined
+ // and null will not be parsed.
+ var prevValue = e.oldValue ? JSON.parse(e.oldValue) : e.oldValue;
+ var curValue = e.newValue ? JSON.parse(e.newValue) : e.newValue;
+ var o = {};
+ o[e.key] = {
+ oldValue: prevValue,
+ newValue: curValue
+ };
+
+ for (var i = 0; i < this.observers_.length; i++) {
+ this.observers_[i](o);
+ }
+};
+
+/**
+ * Register a function to observe storage changes.
+ *
+ * @param {function(map)} callback The function to invoke when the storage
+ * changes.
+ */
+lib.Storage.Local.prototype.addObserver = function(callback) {
+ this.observers_.push(callback);
+};
+
+/**
+ * Unregister a change observer.
+ *
+ * @param {function} observer A previously registered callback.
+ */
+lib.Storage.Local.prototype.removeObserver = function(callback) {
+ var i = this.observers_.indexOf(callback);
+ if (i != -1)
+ this.observers_.splice(i, 1);
+};
+
+/**
+ * Delete everything in this storage.
+ *
+ * @param {function(map)} callback The function to invoke when the delete
+ * has completed.
+ */
+lib.Storage.Local.prototype.clear = function(opt_callback) {
+ this.storage_.clear();
+
+ if (opt_callback)
+ setTimeout(opt_callback, 0);
+};
+
+/**
+ * Return the current value of a storage item.
+ *
+ * @param {string} key The key to look up.
+ * @param {function(value) callback The function to invoke when the value has
+ * been retrieved.
+ */
+lib.Storage.Local.prototype.getItem = function(key, callback) {
+ var value = this.storage_.getItem(key);
+
+ if (typeof value == 'string') {
+ try {
+ value = JSON.parse(value);
+ } catch (e) {
+ // If we can't parse the value, just return it unparsed.
+ }
+ }
+
+ setTimeout(callback.bind(null, value), 0);
+};
+
+/**
+ * Fetch the values of multiple storage items.
+ *
+ * @param {Array} keys The keys to look up.
+ * @param {function(map) callback The function to invoke when the values have
+ * been retrieved.
+ */
+lib.Storage.Local.prototype.getItems = function(keys, callback) {
+ var rv = {};
+
+ for (var i = keys.length - 1; i >= 0; i--) {
+ var key = keys[i];
+ var value = this.storage_.getItem(key);
+ if (typeof value == 'string') {
+ try {
+ rv[key] = JSON.parse(value);
+ } catch (e) {
+ // If we can't parse the value, just return it unparsed.
+ rv[key] = value;
+ }
+ } else {
+ keys.splice(i, 1);
+ }
+ }
+
+ setTimeout(callback.bind(null, rv), 0);
+};
+
+/**
+ * Set a value in storage.
+ *
+ * @param {string} key The key for the value to be stored.
+ * @param {*} value The value to be stored. Anything that can be serialized
+ * with JSON is acceptable.
+ * @param {function()} opt_callback Optional function to invoke when the
+ * set is complete. You don't have to wait for the set to complete in order
+ * to read the value, since the local cache is updated synchronously.
+ */
+lib.Storage.Local.prototype.setItem = function(key, value, opt_callback) {
+ this.storage_.setItem(key, JSON.stringify(value));
+
+ if (opt_callback)
+ setTimeout(opt_callback, 0);
+};
+
+/**
+ * Set multiple values in storage.
+ *
+ * @param {Object} map A map of key/values to set in storage.
+ * @param {function()} opt_callback Optional function to invoke when the
+ * set is complete. You don't have to wait for the set to complete in order
+ * to read the value, since the local cache is updated synchronously.
+ */
+lib.Storage.Local.prototype.setItems = function(obj, opt_callback) {
+ for (var key in obj) {
+ this.storage_.setItem(key, JSON.stringify(obj[key]));
+ }
+
+ if (opt_callback)
+ setTimeout(opt_callback, 0);
+};
+
+/**
+ * Remove an item from storage.
+ *
+ * @param {string} key The key to be removed.
+ * @param {function()} opt_callback Optional function to invoke when the
+ * remove is complete. You don't have to wait for the set to complete in
+ * order to read the value, since the local cache is updated synchronously.
+ */
+lib.Storage.Local.prototype.removeItem = function(key, opt_callback) {
+ this.storage_.removeItem(key);
+
+ if (opt_callback)
+ setTimeout(opt_callback, 0);
+};
+
+/**
+ * Remove multiple items from storage.
+ *
+ * @param {Array} keys The keys to be removed.
+ * @param {function()} opt_callback Optional function to invoke when the
+ * remove is complete. You don't have to wait for the set to complete in
+ * order to read the value, since the local cache is updated synchronously.
+ */
+lib.Storage.Local.prototype.removeItems = function(ary, opt_callback) {
+ for (var i = 0; i < ary.length; i++) {
+ this.storage_.removeItem(ary[i]);
+ }
+
+ if (opt_callback)
+ setTimeout(opt_callback, 0);
+};
+// SOURCE FILE: libdot/js/lib_storage_memory.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * In-memory storage class with an async interface that is interchangeable with
+ * other lib.Storage.* implementations.
+ */
+lib.Storage.Memory = function() {
+ this.observers_ = [];
+ this.storage_ = {};
+};
+
+/**
+ * Register a function to observe storage changes.
+ *
+ * @param {function(map)} callback The function to invoke when the storage
+ * changes.
+ */
+lib.Storage.Memory.prototype.addObserver = function(callback) {
+ this.observers_.push(callback);
+};
+
+/**
+ * Unregister a change observer.
+ *
+ * @param {function} observer A previously registered callback.
+ */
+lib.Storage.Memory.prototype.removeObserver = function(callback) {
+ var i = this.observers_.indexOf(callback);
+ if (i != -1)
+ this.observers_.splice(i, 1);
+};
+
+/**
+ * Delete everything in this storage.
+ *
+ * @param {function(map)} callback The function to invoke when the delete
+ * has completed.
+ */
+lib.Storage.Memory.prototype.clear = function(opt_callback) {
+ var e = {};
+ for (var key in this.storage_) {
+ e[key] = {oldValue: this.storage_[key], newValue: (void 0)};
+ }
+
+ this.storage_ = {};
+
+ setTimeout(function() {
+ for (var i = 0; i < this.observers_.length; i++) {
+ this.observers_[i](e);
+ }
+ }.bind(this), 0);
+
+ if (opt_callback)
+ setTimeout(opt_callback, 0);
+};
+
+/**
+ * Return the current value of a storage item.
+ *
+ * @param {string} key The key to look up.
+ * @param {function(value) callback The function to invoke when the value has
+ * been retrieved.
+ */
+lib.Storage.Memory.prototype.getItem = function(key, callback) {
+ var value = this.storage_[key];
+
+ if (typeof value == 'string') {
+ try {
+ value = JSON.parse(value);
+ } catch (e) {
+ // If we can't parse the value, just return it unparsed.
+ }
+ }
+
+ setTimeout(callback.bind(null, value), 0);
+};
+
+/**
+ * Fetch the values of multiple storage items.
+ *
+ * @param {Array} keys The keys to look up.
+ * @param {function(map) callback The function to invoke when the values have
+ * been retrieved.
+ */
+lib.Storage.Memory.prototype.getItems = function(keys, callback) {
+ var rv = {};
+
+ for (var i = keys.length - 1; i >= 0; i--) {
+ var key = keys[i];
+ var value = this.storage_[key];
+ if (typeof value == 'string') {
+ try {
+ rv[key] = JSON.parse(value);
+ } catch (e) {
+ // If we can't parse the value, just return it unparsed.
+ rv[key] = value;
+ }
+ } else {
+ keys.splice(i, 1);
+ }
+ }
+
+ setTimeout(callback.bind(null, rv), 0);
+};
+
+/**
+ * Set a value in storage.
+ *
+ * @param {string} key The key for the value to be stored.
+ * @param {*} value The value to be stored. Anything that can be serialized
+ * with JSON is acceptable.
+ * @param {function()} opt_callback Optional function to invoke when the
+ * set is complete. You don't have to wait for the set to complete in order
+ * to read the value, since the local cache is updated synchronously.
+ */
+lib.Storage.Memory.prototype.setItem = function(key, value, opt_callback) {
+ var oldValue = this.storage_[key];
+ this.storage_[key] = JSON.stringify(value);
+
+ var e = {};
+ e[key] = {oldValue: oldValue, newValue: value};
+
+ setTimeout(function() {
+ for (var i = 0; i < this.observers_.length; i++) {
+ this.observers_[i](e);
+ }
+ }.bind(this), 0);
+
+ if (opt_callback)
+ setTimeout(opt_callback, 0);
+};
+
+/**
+ * Set multiple values in storage.
+ *
+ * @param {Object} map A map of key/values to set in storage.
+ * @param {function()} opt_callback Optional function to invoke when the
+ * set is complete. You don't have to wait for the set to complete in order
+ * to read the value, since the local cache is updated synchronously.
+ */
+lib.Storage.Memory.prototype.setItems = function(obj, opt_callback) {
+ var e = {};
+
+ for (var key in obj) {
+ e[key] = {oldValue: this.storage_[key], newValue: obj[key]};
+ this.storage_[key] = JSON.stringify(obj[key]);
+ }
+
+ setTimeout(function() {
+ for (var i = 0; i < this.observers_.length; i++) {
+ this.observers_[i](e);
+ }
+ }.bind(this));
+
+ if (opt_callback)
+ setTimeout(opt_callback, 0);
+};
+
+/**
+ * Remove an item from storage.
+ *
+ * @param {string} key The key to be removed.
+ * @param {function()} opt_callback Optional function to invoke when the
+ * remove is complete. You don't have to wait for the set to complete in
+ * order to read the value, since the local cache is updated synchronously.
+ */
+lib.Storage.Memory.prototype.removeItem = function(key, opt_callback) {
+ delete this.storage_[key];
+
+ if (opt_callback)
+ setTimeout(opt_callback, 0);
+};
+
+/**
+ * Remove multiple items from storage.
+ *
+ * @param {Array} keys The keys to be removed.
+ * @param {function()} opt_callback Optional function to invoke when the
+ * remove is complete. You don't have to wait for the set to complete in
+ * order to read the value, since the local cache is updated synchronously.
+ */
+lib.Storage.Memory.prototype.removeItems = function(ary, opt_callback) {
+ for (var i = 0; i < ary.length; i++) {
+ delete this.storage_[ary[i]];
+ }
+
+ if (opt_callback)
+ setTimeout(opt_callback, 0);
+};
+// SOURCE FILE: libdot/js/lib_utf8.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// TODO(davidben): When the string encoding API is implemented,
+// replace this with the native in-browser implementation.
+//
+// https://wiki.whatwg.org/wiki/StringEncoding
+// https://encoding.spec.whatwg.org/
+
+/**
+ * A stateful UTF-8 decoder.
+ */
+lib.UTF8Decoder = function() {
+ // The number of bytes left in the current sequence.
+ this.bytesLeft = 0;
+ // The in-progress code point being decoded, if bytesLeft > 0.
+ this.codePoint = 0;
+ // The lower bound on the final code point, if bytesLeft > 0.
+ this.lowerBound = 0;
+};
+
+/**
+ * Decodes a some UTF-8 data, taking into account state from previous
+ * data streamed through the encoder.
+ *
+ * @param {String} str data to decode, represented as a JavaScript
+ * String with each code unit representing a byte between 0x00 to
+ * 0xFF.
+ * @return {String} The data decoded into a JavaScript UTF-16 string.
+ */
+lib.UTF8Decoder.prototype.decode = function(str) {
+ var ret = '';
+ for (var i = 0; i < str.length; i++) {
+ var c = str.charCodeAt(i);
+ if (this.bytesLeft == 0) {
+ if (c <= 0x7F) {
+ ret += str.charAt(i);
+ } else if (0xC0 <= c && c <= 0xDF) {
+ this.codePoint = c - 0xC0;
+ this.bytesLeft = 1;
+ this.lowerBound = 0x80;
+ } else if (0xE0 <= c && c <= 0xEF) {
+ this.codePoint = c - 0xE0;
+ this.bytesLeft = 2;
+ this.lowerBound = 0x800;
+ } else if (0xF0 <= c && c <= 0xF7) {
+ this.codePoint = c - 0xF0;
+ this.bytesLeft = 3;
+ this.lowerBound = 0x10000;
+ } else if (0xF8 <= c && c <= 0xFB) {
+ this.codePoint = c - 0xF8;
+ this.bytesLeft = 4;
+ this.lowerBound = 0x200000;
+ } else if (0xFC <= c && c <= 0xFD) {
+ this.codePoint = c - 0xFC;
+ this.bytesLeft = 5;
+ this.lowerBound = 0x4000000;
+ } else {
+ ret += '\ufffd';
+ }
+ } else {
+ if (0x80 <= c && c <= 0xBF) {
+ this.bytesLeft--;
+ this.codePoint = (this.codePoint << 6) + (c - 0x80);
+ if (this.bytesLeft == 0) {
+ // Got a full sequence. Check if it's within bounds and
+ // filter out surrogate pairs.
+ var codePoint = this.codePoint;
+ if (codePoint < this.lowerBound
+ || (0xD800 <= codePoint && codePoint <= 0xDFFF)
+ || codePoint > 0x10FFFF) {
+ ret += '\ufffd';
+ } else {
+ // Encode as UTF-16 in the output.
+ if (codePoint < 0x10000) {
+ ret += String.fromCharCode(codePoint);
+ } else {
+ // Surrogate pair.
+ codePoint -= 0x10000;
+ ret += String.fromCharCode(
+ 0xD800 + ((codePoint >>> 10) & 0x3FF),
+ 0xDC00 + (codePoint & 0x3FF));
+ }
+ }
+ }
+ } else {
+ // Too few bytes in multi-byte sequence. Rewind stream so we
+ // don't lose the next byte.
+ ret += '\ufffd';
+ this.bytesLeft = 0;
+ i--;
+ }
+ }
+ }
+ return ret;
+};
+
+/**
+ * Decodes UTF-8 data. This is a convenience function for when all the
+ * data is already known.
+ *
+ * @param {String} str data to decode, represented as a JavaScript
+ * String with each code unit representing a byte between 0x00 to
+ * 0xFF.
+ * @return {String} The data decoded into a JavaScript UTF-16 string.
+ */
+lib.decodeUTF8 = function(utf8) {
+ return (new lib.UTF8Decoder()).decode(utf8);
+};
+
+/**
+ * Encodes a UTF-16 string into UTF-8.
+ *
+ * TODO(davidben): Do we need a stateful version of this that can
+ * handle a surrogate pair split in two calls? What happens if a
+ * keypress event would have contained a character outside the BMP?
+ *
+ * @param {String} str The string to encode.
+ * @return {String} The string encoded as UTF-8, as a JavaScript
+ * string with bytes represented as code units from 0x00 to 0xFF.
+ */
+lib.encodeUTF8 = function(str) {
+ var ret = '';
+ for (var i = 0; i < str.length; i++) {
+ // Get a unicode code point out of str.
+ var c = str.charCodeAt(i);
+ if (0xDC00 <= c && c <= 0xDFFF) {
+ c = 0xFFFD;
+ } else if (0xD800 <= c && c <= 0xDBFF) {
+ if (i+1 < str.length) {
+ var d = str.charCodeAt(i+1);
+ if (0xDC00 <= d && d <= 0xDFFF) {
+ // Swallow a surrogate pair.
+ c = 0x10000 + ((c & 0x3FF) << 10) + (d & 0x3FF);
+ i++;
+ } else {
+ c = 0xFFFD;
+ }
+ } else {
+ c = 0xFFFD;
+ }
+ }
+
+ // Encode c in UTF-8.
+ var bytesLeft;
+ if (c <= 0x7F) {
+ ret += str.charAt(i);
+ continue;
+ } else if (c <= 0x7FF) {
+ ret += String.fromCharCode(0xC0 | (c >>> 6));
+ bytesLeft = 1;
+ } else if (c <= 0xFFFF) {
+ ret += String.fromCharCode(0xE0 | (c >>> 12));
+ bytesLeft = 2;
+ } else /* if (c <= 0x10FFFF) */ {
+ ret += String.fromCharCode(0xF0 | (c >>> 18));
+ bytesLeft = 3;
+ }
+
+ while (bytesLeft > 0) {
+ bytesLeft--;
+ ret += String.fromCharCode(0x80 | ((c >>> (6 * bytesLeft)) & 0x3F));
+ }
+ }
+ return ret;
+};
+// SOURCE FILE: libdot/third_party/wcwidth/lib_wc.js
+// Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
+// Use of lib.wc source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * This JavaScript library is ported from the wcwidth.js module of node.js.
+ * The original implementation can be found at:
+ * https://npmjs.org/package/wcwidth.js
+ */
+
+/**
+ * JavaScript porting of Markus Kuhn's wcwidth() implementation
+ *
+ * The following explanation comes from the original C implementation:
+ *
+ * This is an implementation of wcwidth() and wcswidth() (defined in
+ * IEEE Std 1002.1-2001) for Unicode.
+ *
+ * http://www.opengroup.org/onlinepubs/007904975/functions/wcwidth.html
+ * http://www.opengroup.org/onlinepubs/007904975/functions/wcswidth.html
+ *
+ * In fixed-width output devices, Latin characters all occupy a single
+ * "cell" position of equal width, whereas ideographic CJK characters
+ * occupy two such cells. Interoperability between terminal-line
+ * applications and (teletype-style) character terminals using the
+ * UTF-8 encoding requires agreement on which character should advance
+ * the cursor by how many cell positions. No established formal
+ * standards exist at present on which Unicode character shall occupy
+ * how many cell positions on character terminals. These routines are
+ * a first attempt of defining such behavior based on simple rules
+ * applied to data provided by the Unicode Consortium.
+ *
+ * For some graphical characters, the Unicode standard explicitly
+ * defines a character-cell width via the definition of the East Asian
+ * FullWidth (F), Wide (W), Half-width (H), and Narrow (Na) classes.
+ * In all these cases, there is no ambiguity about which width a
+ * terminal shall use. For characters in the East Asian Ambiguous (A)
+ * class, the width choice depends purely on a preference of backward
+ * compatibility with either historic CJK or Western practice.
+ * Choosing single-width for these characters is easy to justify as
+ * the appropriate long-term solution, as the CJK practice of
+ * displaying these characters as double-width comes from historic
+ * implementation simplicity (8-bit encoded characters were displayed
+ * single-width and 16-bit ones double-width, even for Greek,
+ * Cyrillic, etc.) and not any typographic considerations.
+ *
+ * Much less clear is the choice of width for the Not East Asian
+ * (Neutral) class. Existing practice does not dictate a width for any
+ * of these characters. It would nevertheless make sense
+ * typographically to allocate two character cells to characters such
+ * as for instance EM SPACE or VOLUME INTEGRAL, which cannot be
+ * represented adequately with a single-width glyph. The following
+ * routines at present merely assign a single-cell width to all
+ * neutral characters, in the interest of simplicity. This is not
+ * entirely satisfactory and should be reconsidered before
+ * establishing a formal standard in lib.wc area. At the moment, the
+ * decision which Not East Asian (Neutral) characters should be
+ * represented by double-width glyphs cannot yet be answered by
+ * applying a simple rule from the Unicode database content. Setting
+ * up a proper standard for the behavior of UTF-8 character terminals
+ * will require a careful analysis not only of each Unicode character,
+ * but also of each presentation form, something the author of these
+ * routines has avoided to do so far.
+ *
+ * http://www.unicode.org/unicode/reports/tr11/
+ *
+ * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
+ *
+ * Permission to use, copy, modify, and distribute lib.wc software
+ * for any purpose and without fee is hereby granted. The author
+ * disclaims all warranties with regard to lib.wc software.
+ *
+ * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
+ */
+
+/**
+ * The following function defines the column width of an ISO 10646 character
+ * as follows:
+ *
+ * - The null character (U+0000) has a column width of 0.
+ * - Other C0/C1 control characters and DEL will lead to a return value of -1.
+ * - Non-spacing and enclosing combining characters (general category code Mn
+ * or Me in the Unicode database) have a column width of 0.
+ * - SOFT HYPHEN (U+00AD) has a column width of 1.
+ * - Other format characters (general category code Cf in the Unicode database)
+ * and ZERO WIDTH SPACE (U+200B) have a column width of 0.
+ * - Hangul Jamo medial vowels and final consonants (U+1160-U+11FF) have a
+ * column width of 0.
+ * - Spacing characters in the East Asian Wide (W) or East Asian Full-width (F)
+ * category as defined in Unicode Technical Report #11 have a column width of
+ * 2.
+ * - East Asian Ambiguous characters are taken into account if
+ * regardCjkAmbiguous flag is enabled. They have a column width of 2.
+ * - All remaining characters (including all printable ISO 8859-1 and WGL4
+ * characters, Unicode control characters, etc.) have a column width of 1.
+ *
+ * This implementation assumes that characters are encoded in ISO 10646.
+ */
+
+lib.wc = {};
+
+// Width of a nul character.
+lib.wc.nulWidth = 0;
+
+// Width of a control character.
+lib.wc.controlWidth = 0;
+
+// Flag whether to consider East Asian Ambiguous characters.
+lib.wc.regardCjkAmbiguous = false;
+
+// Width of an East Asian Ambiguous character.
+lib.wc.cjkAmbiguousWidth = 2;
+
+// Sorted list of non-overlapping intervals of non-spacing characters
+// generated by the `./ranges.py` helper.
+lib.wc.combining = [
+ [0x00ad, 0x00ad], [0x0300, 0x036f], [0x0483, 0x0489],
+ [0x0591, 0x05bd], [0x05bf, 0x05bf], [0x05c1, 0x05c2],
+ [0x05c4, 0x05c5], [0x05c7, 0x05c7], [0x0610, 0x061a],
+ [0x061c, 0x061c], [0x064b, 0x065f], [0x0670, 0x0670],
+ [0x06d6, 0x06dc], [0x06df, 0x06e4], [0x06e7, 0x06e8],
+ [0x06ea, 0x06ed], [0x0711, 0x0711], [0x0730, 0x074a],
+ [0x07a6, 0x07b0], [0x07eb, 0x07f3], [0x07fd, 0x07fd],
+ [0x0816, 0x0819], [0x081b, 0x0823], [0x0825, 0x0827],
+ [0x0829, 0x082d], [0x0859, 0x085b], [0x08d3, 0x08e1],
+ [0x08e3, 0x0902], [0x093a, 0x093a], [0x093c, 0x093c],
+ [0x0941, 0x0948], [0x094d, 0x094d], [0x0951, 0x0957],
+ [0x0962, 0x0963], [0x0981, 0x0981], [0x09bc, 0x09bc],
+ [0x09c1, 0x09c4], [0x09cd, 0x09cd], [0x09e2, 0x09e3],
+ [0x09fe, 0x09fe], [0x0a01, 0x0a02], [0x0a3c, 0x0a3c],
+ [0x0a41, 0x0a42], [0x0a47, 0x0a48], [0x0a4b, 0x0a4d],
+ [0x0a51, 0x0a51], [0x0a70, 0x0a71], [0x0a75, 0x0a75],
+ [0x0a81, 0x0a82], [0x0abc, 0x0abc], [0x0ac1, 0x0ac5],
+ [0x0ac7, 0x0ac8], [0x0acd, 0x0acd], [0x0ae2, 0x0ae3],
+ [0x0afa, 0x0aff], [0x0b01, 0x0b01], [0x0b3c, 0x0b3c],
+ [0x0b3f, 0x0b3f], [0x0b41, 0x0b44], [0x0b4d, 0x0b4d],
+ [0x0b56, 0x0b56], [0x0b62, 0x0b63], [0x0b82, 0x0b82],
+ [0x0bc0, 0x0bc0], [0x0bcd, 0x0bcd], [0x0c00, 0x0c00],
+ [0x0c04, 0x0c04], [0x0c3e, 0x0c40], [0x0c46, 0x0c48],
+ [0x0c4a, 0x0c4d], [0x0c55, 0x0c56], [0x0c62, 0x0c63],
+ [0x0c81, 0x0c81], [0x0cbc, 0x0cbc], [0x0cbf, 0x0cbf],
+ [0x0cc6, 0x0cc6], [0x0ccc, 0x0ccd], [0x0ce2, 0x0ce3],
+ [0x0d00, 0x0d01], [0x0d3b, 0x0d3c], [0x0d41, 0x0d44],
+ [0x0d4d, 0x0d4d], [0x0d62, 0x0d63], [0x0dca, 0x0dca],
+ [0x0dd2, 0x0dd4], [0x0dd6, 0x0dd6], [0x0e31, 0x0e31],
+ [0x0e34, 0x0e3a], [0x0e47, 0x0e4e], [0x0eb1, 0x0eb1],
+ [0x0eb4, 0x0eb9], [0x0ebb, 0x0ebc], [0x0ec8, 0x0ecd],
+ [0x0f18, 0x0f19], [0x0f35, 0x0f35], [0x0f37, 0x0f37],
+ [0x0f39, 0x0f39], [0x0f71, 0x0f7e], [0x0f80, 0x0f84],
+ [0x0f86, 0x0f87], [0x0f8d, 0x0f97], [0x0f99, 0x0fbc],
+ [0x0fc6, 0x0fc6], [0x102d, 0x1030], [0x1032, 0x1037],
+ [0x1039, 0x103a], [0x103d, 0x103e], [0x1058, 0x1059],
+ [0x105e, 0x1060], [0x1071, 0x1074], [0x1082, 0x1082],
+ [0x1085, 0x1086], [0x108d, 0x108d], [0x109d, 0x109d],
+ [0x1160, 0x11ff], [0x135d, 0x135f], [0x1712, 0x1714],
+ [0x1732, 0x1734], [0x1752, 0x1753], [0x1772, 0x1773],
+ [0x17b4, 0x17b5], [0x17b7, 0x17bd], [0x17c6, 0x17c6],
+ [0x17c9, 0x17d3], [0x17dd, 0x17dd], [0x180b, 0x180e],
+ [0x1885, 0x1886], [0x18a9, 0x18a9], [0x1920, 0x1922],
+ [0x1927, 0x1928], [0x1932, 0x1932], [0x1939, 0x193b],
+ [0x1a17, 0x1a18], [0x1a1b, 0x1a1b], [0x1a56, 0x1a56],
+ [0x1a58, 0x1a5e], [0x1a60, 0x1a60], [0x1a62, 0x1a62],
+ [0x1a65, 0x1a6c], [0x1a73, 0x1a7c], [0x1a7f, 0x1a7f],
+ [0x1ab0, 0x1abe], [0x1b00, 0x1b03], [0x1b34, 0x1b34],
+ [0x1b36, 0x1b3a], [0x1b3c, 0x1b3c], [0x1b42, 0x1b42],
+ [0x1b6b, 0x1b73], [0x1b80, 0x1b81], [0x1ba2, 0x1ba5],
+ [0x1ba8, 0x1ba9], [0x1bab, 0x1bad], [0x1be6, 0x1be6],
+ [0x1be8, 0x1be9], [0x1bed, 0x1bed], [0x1bef, 0x1bf1],
+ [0x1c2c, 0x1c33], [0x1c36, 0x1c37], [0x1cd0, 0x1cd2],
+ [0x1cd4, 0x1ce0], [0x1ce2, 0x1ce8], [0x1ced, 0x1ced],
+ [0x1cf4, 0x1cf4], [0x1cf8, 0x1cf9], [0x1dc0, 0x1df9],
+ [0x1dfb, 0x1dff], [0x200b, 0x200f], [0x202a, 0x202e],
+ [0x2060, 0x2064], [0x2066, 0x206f], [0x20d0, 0x20f0],
+ [0x2cef, 0x2cf1], [0x2d7f, 0x2d7f], [0x2de0, 0x2dff],
+ [0x302a, 0x302d], [0x3099, 0x309a], [0xa66f, 0xa672],
+ [0xa674, 0xa67d], [0xa69e, 0xa69f], [0xa6f0, 0xa6f1],
+ [0xa802, 0xa802], [0xa806, 0xa806], [0xa80b, 0xa80b],
+ [0xa825, 0xa826], [0xa8c4, 0xa8c5], [0xa8e0, 0xa8f1],
+ [0xa8ff, 0xa8ff], [0xa926, 0xa92d], [0xa947, 0xa951],
+ [0xa980, 0xa982], [0xa9b3, 0xa9b3], [0xa9b6, 0xa9b9],
+ [0xa9bc, 0xa9bc], [0xa9e5, 0xa9e5], [0xaa29, 0xaa2e],
+ [0xaa31, 0xaa32], [0xaa35, 0xaa36], [0xaa43, 0xaa43],
+ [0xaa4c, 0xaa4c], [0xaa7c, 0xaa7c], [0xaab0, 0xaab0],
+ [0xaab2, 0xaab4], [0xaab7, 0xaab8], [0xaabe, 0xaabf],
+ [0xaac1, 0xaac1], [0xaaec, 0xaaed], [0xaaf6, 0xaaf6],
+ [0xabe5, 0xabe5], [0xabe8, 0xabe8], [0xabed, 0xabed],
+ [0xfb1e, 0xfb1e], [0xfe00, 0xfe0f], [0xfe20, 0xfe2f],
+ [0xfeff, 0xfeff], [0xfff9, 0xfffb], [0x101fd, 0x101fd],
+ [0x102e0, 0x102e0], [0x10376, 0x1037a], [0x10a01, 0x10a03],
+ [0x10a05, 0x10a06], [0x10a0c, 0x10a0f], [0x10a38, 0x10a3a],
+ [0x10a3f, 0x10a3f], [0x10ae5, 0x10ae6], [0x10d24, 0x10d27],
+ [0x10f46, 0x10f50], [0x11001, 0x11001], [0x11038, 0x11046],
+ [0x1107f, 0x11081], [0x110b3, 0x110b6], [0x110b9, 0x110ba],
+ [0x11100, 0x11102], [0x11127, 0x1112b], [0x1112d, 0x11134],
+ [0x11173, 0x11173], [0x11180, 0x11181], [0x111b6, 0x111be],
+ [0x111c9, 0x111cc], [0x1122f, 0x11231], [0x11234, 0x11234],
+ [0x11236, 0x11237], [0x1123e, 0x1123e], [0x112df, 0x112df],
+ [0x112e3, 0x112ea], [0x11300, 0x11301], [0x1133b, 0x1133c],
+ [0x11340, 0x11340], [0x11366, 0x1136c], [0x11370, 0x11374],
+ [0x11438, 0x1143f], [0x11442, 0x11444], [0x11446, 0x11446],
+ [0x1145e, 0x1145e], [0x114b3, 0x114b8], [0x114ba, 0x114ba],
+ [0x114bf, 0x114c0], [0x114c2, 0x114c3], [0x115b2, 0x115b5],
+ [0x115bc, 0x115bd], [0x115bf, 0x115c0], [0x115dc, 0x115dd],
+ [0x11633, 0x1163a], [0x1163d, 0x1163d], [0x1163f, 0x11640],
+ [0x116ab, 0x116ab], [0x116ad, 0x116ad], [0x116b0, 0x116b5],
+ [0x116b7, 0x116b7], [0x1171d, 0x1171f], [0x11722, 0x11725],
+ [0x11727, 0x1172b], [0x1182f, 0x11837], [0x11839, 0x1183a],
+ [0x11a01, 0x11a0a], [0x11a33, 0x11a38], [0x11a3b, 0x11a3e],
+ [0x11a47, 0x11a47], [0x11a51, 0x11a56], [0x11a59, 0x11a5b],
+ [0x11a8a, 0x11a96], [0x11a98, 0x11a99], [0x11c30, 0x11c36],
+ [0x11c38, 0x11c3d], [0x11c3f, 0x11c3f], [0x11c92, 0x11ca7],
+ [0x11caa, 0x11cb0], [0x11cb2, 0x11cb3], [0x11cb5, 0x11cb6],
+ [0x11d31, 0x11d36], [0x11d3a, 0x11d3a], [0x11d3c, 0x11d3d],
+ [0x11d3f, 0x11d45], [0x11d47, 0x11d47], [0x11d90, 0x11d91],
+ [0x11d95, 0x11d95], [0x11d97, 0x11d97], [0x11ef3, 0x11ef4],
+ [0x16af0, 0x16af4], [0x16b30, 0x16b36], [0x16f8f, 0x16f92],
+ [0x1bc9d, 0x1bc9e], [0x1bca0, 0x1bca3], [0x1d167, 0x1d169],
+ [0x1d173, 0x1d182], [0x1d185, 0x1d18b], [0x1d1aa, 0x1d1ad],
+ [0x1d242, 0x1d244], [0x1da00, 0x1da36], [0x1da3b, 0x1da6c],
+ [0x1da75, 0x1da75], [0x1da84, 0x1da84], [0x1da9b, 0x1da9f],
+ [0x1daa1, 0x1daaf], [0x1e000, 0x1e006], [0x1e008, 0x1e018],
+ [0x1e01b, 0x1e021], [0x1e023, 0x1e024], [0x1e026, 0x1e02a],
+ [0x1e8d0, 0x1e8d6], [0x1e944, 0x1e94a], [0xe0001, 0xe0001],
+ [0xe0020, 0xe007f], [0xe0100, 0xe01ef],
+];
+
+// Sorted list of non-overlapping intervals of East Asian Ambiguous characters
+// generated by the `./ranges.py` helper.
+lib.wc.ambiguous = [
+ [0x00a1, 0x00a1], [0x00a4, 0x00a4], [0x00a7, 0x00a8],
+ [0x00aa, 0x00aa], [0x00ad, 0x00ae], [0x00b0, 0x00b4],
+ [0x00b6, 0x00ba], [0x00bc, 0x00bf], [0x00c6, 0x00c6],
+ [0x00d0, 0x00d0], [0x00d7, 0x00d8], [0x00de, 0x00e1],
+ [0x00e6, 0x00e6], [0x00e8, 0x00ea], [0x00ec, 0x00ed],
+ [0x00f0, 0x00f0], [0x00f2, 0x00f3], [0x00f7, 0x00fa],
+ [0x00fc, 0x00fc], [0x00fe, 0x00fe], [0x0101, 0x0101],
+ [0x0111, 0x0111], [0x0113, 0x0113], [0x011b, 0x011b],
+ [0x0126, 0x0127], [0x012b, 0x012b], [0x0131, 0x0133],
+ [0x0138, 0x0138], [0x013f, 0x0142], [0x0144, 0x0144],
+ [0x0148, 0x014b], [0x014d, 0x014d], [0x0152, 0x0153],
+ [0x0166, 0x0167], [0x016b, 0x016b], [0x01ce, 0x01ce],
+ [0x01d0, 0x01d0], [0x01d2, 0x01d2], [0x01d4, 0x01d4],
+ [0x01d6, 0x01d6], [0x01d8, 0x01d8], [0x01da, 0x01da],
+ [0x01dc, 0x01dc], [0x0251, 0x0251], [0x0261, 0x0261],
+ [0x02c4, 0x02c4], [0x02c7, 0x02c7], [0x02c9, 0x02cb],
+ [0x02cd, 0x02cd], [0x02d0, 0x02d0], [0x02d8, 0x02db],
+ [0x02dd, 0x02dd], [0x02df, 0x02df], [0x0300, 0x036f],
+ [0x0391, 0x03a1], [0x03a3, 0x03a9], [0x03b1, 0x03c1],
+ [0x03c3, 0x03c9], [0x0401, 0x0401], [0x0410, 0x044f],
+ [0x0451, 0x0451], [0x1100, 0x115f], [0x2010, 0x2010],
+ [0x2013, 0x2016], [0x2018, 0x2019], [0x201c, 0x201d],
+ [0x2020, 0x2022], [0x2024, 0x2027], [0x2030, 0x2030],
+ [0x2032, 0x2033], [0x2035, 0x2035], [0x203b, 0x203b],
+ [0x203e, 0x203e], [0x2074, 0x2074], [0x207f, 0x207f],
+ [0x2081, 0x2084], [0x20ac, 0x20ac], [0x2103, 0x2103],
+ [0x2105, 0x2105], [0x2109, 0x2109], [0x2113, 0x2113],
+ [0x2116, 0x2116], [0x2121, 0x2122], [0x2126, 0x2126],
+ [0x212b, 0x212b], [0x2153, 0x2154], [0x215b, 0x215e],
+ [0x2160, 0x216b], [0x2170, 0x2179], [0x2189, 0x2189],
+ [0x2190, 0x2199], [0x21b8, 0x21b9], [0x21d2, 0x21d2],
+ [0x21d4, 0x21d4], [0x21e7, 0x21e7], [0x2200, 0x2200],
+ [0x2202, 0x2203], [0x2207, 0x2208], [0x220b, 0x220b],
+ [0x220f, 0x220f], [0x2211, 0x2211], [0x2215, 0x2215],
+ [0x221a, 0x221a], [0x221d, 0x2220], [0x2223, 0x2223],
+ [0x2225, 0x2225], [0x2227, 0x222c], [0x222e, 0x222e],
+ [0x2234, 0x2237], [0x223c, 0x223d], [0x2248, 0x2248],
+ [0x224c, 0x224c], [0x2252, 0x2252], [0x2260, 0x2261],
+ [0x2264, 0x2267], [0x226a, 0x226b], [0x226e, 0x226f],
+ [0x2282, 0x2283], [0x2286, 0x2287], [0x2295, 0x2295],
+ [0x2299, 0x2299], [0x22a5, 0x22a5], [0x22bf, 0x22bf],
+ [0x2312, 0x2312], [0x231a, 0x231b], [0x2329, 0x232a],
+ [0x23e9, 0x23ec], [0x23f0, 0x23f0], [0x23f3, 0x23f3],
+ [0x2460, 0x24e9], [0x24eb, 0x254b], [0x2550, 0x2573],
+ [0x2580, 0x258f], [0x2592, 0x2595], [0x25a0, 0x25a1],
+ [0x25a3, 0x25a9], [0x25b2, 0x25b3], [0x25b6, 0x25b7],
+ [0x25bc, 0x25bd], [0x25c0, 0x25c1], [0x25c6, 0x25c8],
+ [0x25cb, 0x25cb], [0x25ce, 0x25d1], [0x25e2, 0x25e5],
+ [0x25ef, 0x25ef], [0x25fd, 0x25fe], [0x2605, 0x2606],
+ [0x2609, 0x2609], [0x260e, 0x260f], [0x2614, 0x2615],
+ [0x261c, 0x261c], [0x261e, 0x261e], [0x2640, 0x2640],
+ [0x2642, 0x2642], [0x2648, 0x2653], [0x2660, 0x2661],
+ [0x2663, 0x2665], [0x2667, 0x266a], [0x266c, 0x266d],
+ [0x266f, 0x266f], [0x267f, 0x267f], [0x2693, 0x2693],
+ [0x269e, 0x269f], [0x26a1, 0x26a1], [0x26aa, 0x26ab],
+ [0x26bd, 0x26bf], [0x26c4, 0x26e1], [0x26e3, 0x26e3],
+ [0x26e8, 0x26ff], [0x2705, 0x2705], [0x270a, 0x270b],
+ [0x2728, 0x2728], [0x273d, 0x273d], [0x274c, 0x274c],
+ [0x274e, 0x274e], [0x2753, 0x2755], [0x2757, 0x2757],
+ [0x2776, 0x277f], [0x2795, 0x2797], [0x27b0, 0x27b0],
+ [0x27bf, 0x27bf], [0x2b1b, 0x2b1c], [0x2b50, 0x2b50],
+ [0x2b55, 0x2b59], [0x2e80, 0x2fdf], [0x2ff0, 0x303e],
+ [0x3040, 0x4dbf], [0x4e00, 0xa4cf], [0xa960, 0xa97f],
+ [0xac00, 0xd7a3], [0xe000, 0xfaff], [0xfe00, 0xfe19],
+ [0xfe30, 0xfe6f], [0xff01, 0xff60], [0xffe0, 0xffe6],
+ [0xfffd, 0xfffd], [0x16fe0, 0x16fe1], [0x17000, 0x18aff],
+ [0x1b000, 0x1b12f], [0x1b170, 0x1b2ff], [0x1f004, 0x1f004],
+ [0x1f0cf, 0x1f0cf], [0x1f100, 0x1f10a], [0x1f110, 0x1f12d],
+ [0x1f130, 0x1f169], [0x1f170, 0x1f1ac], [0x1f200, 0x1f202],
+ [0x1f210, 0x1f23b], [0x1f240, 0x1f248], [0x1f250, 0x1f251],
+ [0x1f260, 0x1f265], [0x1f300, 0x1f320], [0x1f32d, 0x1f335],
+ [0x1f337, 0x1f37c], [0x1f37e, 0x1f393], [0x1f3a0, 0x1f3ca],
+ [0x1f3cf, 0x1f3d3], [0x1f3e0, 0x1f3f0], [0x1f3f4, 0x1f3f4],
+ [0x1f3f8, 0x1f43e], [0x1f440, 0x1f440], [0x1f442, 0x1f4fc],
+ [0x1f4ff, 0x1f53d], [0x1f54b, 0x1f54e], [0x1f550, 0x1f567],
+ [0x1f57a, 0x1f57a], [0x1f595, 0x1f596], [0x1f5a4, 0x1f5a4],
+ [0x1f5fb, 0x1f64f], [0x1f680, 0x1f6c5], [0x1f6cc, 0x1f6cc],
+ [0x1f6d0, 0x1f6d2], [0x1f6eb, 0x1f6ec], [0x1f6f4, 0x1f6f9],
+ [0x1f910, 0x1f93e], [0x1f940, 0x1f970], [0x1f973, 0x1f976],
+ [0x1f97a, 0x1f97a], [0x1f97c, 0x1f9a2], [0x1f9b0, 0x1f9b9],
+ [0x1f9c0, 0x1f9c2], [0x1f9d0, 0x1f9ff], [0x20000, 0x2fffd],
+ [0x30000, 0x3fffd], [0xe0100, 0xe01ef], [0xf0000, 0xffffd],
+ [0x100000, 0x10fffd],
+];
+
+// Sorted list of non-overlapping intervals of East Asian Unambiguous characters
+// generated by the `./ranges.py` helper.
+lib.wc.unambiguous = [
+ [0x1100, 0x115f], [0x231a, 0x231b], [0x2329, 0x232a],
+ [0x23e9, 0x23ec], [0x23f0, 0x23f0], [0x23f3, 0x23f3],
+ [0x25fd, 0x25fe], [0x2614, 0x2615], [0x2648, 0x2653],
+ [0x267f, 0x267f], [0x2693, 0x2693], [0x26a1, 0x26a1],
+ [0x26aa, 0x26ab], [0x26bd, 0x26be], [0x26c4, 0x26c5],
+ [0x26ce, 0x26ce], [0x26d4, 0x26d4], [0x26ea, 0x26ea],
+ [0x26f2, 0x26f3], [0x26f5, 0x26f5], [0x26fa, 0x26fa],
+ [0x26fd, 0x26fd], [0x2705, 0x2705], [0x270a, 0x270b],
+ [0x2728, 0x2728], [0x274c, 0x274c], [0x274e, 0x274e],
+ [0x2753, 0x2755], [0x2757, 0x2757], [0x2795, 0x2797],
+ [0x27b0, 0x27b0], [0x27bf, 0x27bf], [0x2b1b, 0x2b1c],
+ [0x2b50, 0x2b50], [0x2b55, 0x2b55], [0x2e80, 0x2fdf],
+ [0x2ff0, 0x303e], [0x3040, 0x3247], [0x3250, 0x4dbf],
+ [0x4e00, 0xa4cf], [0xa960, 0xa97f], [0xac00, 0xd7a3],
+ [0xf900, 0xfaff], [0xfe10, 0xfe19], [0xfe30, 0xfe6f],
+ [0xff01, 0xff60], [0xffe0, 0xffe6], [0x16fe0, 0x16fe1],
+ [0x17000, 0x18aff], [0x1b000, 0x1b12f], [0x1b170, 0x1b2ff],
+ [0x1f004, 0x1f004], [0x1f0cf, 0x1f0cf], [0x1f18e, 0x1f18e],
+ [0x1f191, 0x1f19a], [0x1f200, 0x1f202], [0x1f210, 0x1f23b],
+ [0x1f240, 0x1f248], [0x1f250, 0x1f251], [0x1f260, 0x1f265],
+ [0x1f300, 0x1f320], [0x1f32d, 0x1f335], [0x1f337, 0x1f37c],
+ [0x1f37e, 0x1f393], [0x1f3a0, 0x1f3ca], [0x1f3cf, 0x1f3d3],
+ [0x1f3e0, 0x1f3f0], [0x1f3f4, 0x1f3f4], [0x1f3f8, 0x1f43e],
+ [0x1f440, 0x1f440], [0x1f442, 0x1f4fc], [0x1f4ff, 0x1f53d],
+ [0x1f54b, 0x1f54e], [0x1f550, 0x1f567], [0x1f57a, 0x1f57a],
+ [0x1f595, 0x1f596], [0x1f5a4, 0x1f5a4], [0x1f5fb, 0x1f64f],
+ [0x1f680, 0x1f6c5], [0x1f6cc, 0x1f6cc], [0x1f6d0, 0x1f6d2],
+ [0x1f6eb, 0x1f6ec], [0x1f6f4, 0x1f6f9], [0x1f910, 0x1f93e],
+ [0x1f940, 0x1f970], [0x1f973, 0x1f976], [0x1f97a, 0x1f97a],
+ [0x1f97c, 0x1f9a2], [0x1f9b0, 0x1f9b9], [0x1f9c0, 0x1f9c2],
+ [0x1f9d0, 0x1f9ff], [0x20000, 0x2fffd], [0x30000, 0x3fffd],
+];
+
+/**
+ * Binary search to check if the given unicode character is in the table.
+ *
+ * @param {integer} ucs A unicode character code.
+ * @param {Object} table A sorted list of internals to match against.
+ * @return {boolean} True if the given character is in the table.
+ */
+lib.wc.binaryTableSearch_ = function(ucs, table) {
+ var min = 0, max = table.length - 1;
+ var mid;
+
+ if (ucs < table[min][0] || ucs > table[max][1])
+ return false;
+ while (max >= min) {
+ mid = Math.floor((min + max) / 2);
+ if (ucs > table[mid][1]) {
+ min = mid + 1;
+ } else if (ucs < table[mid][0]) {
+ max = mid - 1;
+ } else {
+ return true;
+ }
+ }
+
+ return false;
+};
+
+/**
+ * Binary search to check if the given unicode character is a space character.
+ *
+ * @param {integer} ucs A unicode character code.
+ *
+ * @return {boolean} True if the given character is a space character; false
+ * otherwise.
+ */
+lib.wc.isSpace = function(ucs) {
+ return lib.wc.binaryTableSearch_(ucs, lib.wc.combining);
+};
+
+/**
+ * Auxiliary function for checking if the given unicode character is a East
+ * Asian Ambiguous character.
+ *
+ * @param {integer} ucs A unicode character code.
+ *
+ * @return {boolean} True if the given character is a East Asian Ambiguous
+ * character.
+ */
+lib.wc.isCjkAmbiguous = function(ucs) {
+ return lib.wc.binaryTableSearch_(ucs, lib.wc.ambiguous);
+};
+
+/**
+ * Determine the column width of the given character.
+ *
+ * @param {integer} ucs A unicode character code.
+ *
+ * @return {integer} The column width of the given character.
+ */
+lib.wc.charWidth = function(ucs) {
+ if (lib.wc.regardCjkAmbiguous) {
+ return lib.wc.charWidthRegardAmbiguous(ucs);
+ } else {
+ return lib.wc.charWidthDisregardAmbiguous(ucs);
+ }
+};
+
+/**
+ * Determine the column width of the given character without considering East
+ * Asian Ambiguous characters.
+ *
+ * @param {integer} ucs A unicode character code.
+ *
+ * @return {integer} The column width of the given character.
+ */
+lib.wc.charWidthDisregardAmbiguous = function(ucs) {
+ // Optimize for ASCII characters.
+ if (ucs < 0x7f) {
+ if (ucs >= 0x20)
+ return 1;
+ else if (ucs == 0)
+ return lib.wc.nulWidth;
+ else /* if (ucs < 0x20) */
+ return lib.wc.controlWidth;
+ }
+
+ // Test for 8-bit control characters.
+ if (ucs < 0xa0)
+ return lib.wc.controlWidth;
+
+ // Binary search in table of non-spacing characters.
+ if (lib.wc.isSpace(ucs))
+ return 0;
+
+ // Binary search in table of wide characters.
+ return lib.wc.binaryTableSearch_(ucs, lib.wc.unambiguous) ? 2 : 1;
+};
+
+/**
+ * Determine the column width of the given character considering East Asian
+ * Ambiguous characters.
+ *
+ * @param {integer} ucs A unicode character code.
+ *
+ * @return {integer} The column width of the given character.
+ */
+lib.wc.charWidthRegardAmbiguous = function(ucs) {
+ if (lib.wc.isCjkAmbiguous(ucs))
+ return lib.wc.cjkAmbiguousWidth;
+
+ return lib.wc.charWidthDisregardAmbiguous(ucs);
+};
+
+/**
+ * Determine the column width of the given string.
+ *
+ * @param {string} str A string.
+ *
+ * @return {integer} The column width of the given string.
+ */
+lib.wc.strWidth = function(str) {
+ var width, rv = 0;
+
+ for (var i = 0; i < str.length;) {
+ var codePoint = str.codePointAt(i);
+ width = lib.wc.charWidth(codePoint);
+ if (width < 0)
+ return -1;
+ rv += width;
+ i += (codePoint <= 0xffff) ? 1 : 2;
+ }
+
+ return rv;
+};
+
+/**
+ * Get the substring at the given column offset of the given column width.
+ *
+ * @param {string} str The string to get substring from.
+ * @param {integer} start The starting column offset to get substring.
+ * @param {integer} opt_width The column width of the substring.
+ *
+ * @return {string} The substring.
+ */
+lib.wc.substr = function(str, start, opt_width) {
+ var startIndex = 0;
+ var endIndex, width;
+
+ // Fun edge case: Normally we associate zero width codepoints (like combining
+ // characters) with the previous codepoint, so we skip any leading ones while
+ // including trailing ones. However, if there are zero width codepoints at
+ // the start of the string, and the substring starts at 0, lets include them
+ // in the result. This also makes for a simple optimization for a common
+ // request.
+ if (start) {
+ for (width = 0; startIndex < str.length;) {
+ const codePoint = str.codePointAt(startIndex);
+ width += lib.wc.charWidth(codePoint);
+ if (width > start)
+ break;
+ startIndex += (codePoint <= 0xffff) ? 1 : 2;
+ }
+ }
+
+ if (opt_width != undefined) {
+ for (endIndex = startIndex, width = 0; endIndex < str.length;) {
+ const codePoint = str.codePointAt(endIndex);
+ width += lib.wc.charWidth(codePoint);
+ if (width > opt_width)
+ break;
+ endIndex += (codePoint <= 0xffff) ? 1 : 2;
+ }
+ return str.substring(startIndex, endIndex);
+ }
+
+ return str.substr(startIndex);
+};
+
+/**
+ * Get substring at the given start and end column offset.
+ *
+ * @param {string} str The string to get substring from.
+ * @param {integer} start The starting column offset.
+ * @param {integer} end The ending column offset.
+ *
+ * @return {string} The substring.
+ */
+lib.wc.substring = function(str, start, end) {
+ return lib.wc.substr(str, start, end - start);
+};
+lib.resource.add('libdot/changelog/version', 'text/plain',
+'1.26'
+);
+
+lib.resource.add('libdot/changelog/date', 'text/plain',
+'2019-01-19'
+);
+
+// This file was generated by libdot/bin/concat.sh.
+// It has been marked read-only for your safety. Rather than
+// edit it directly, please modify one of these source files.
+//
+// hterm/audio/bell.ogg
+// hterm/images/icon-96.png
+
+'use strict';
+
+lib.resource.add('hterm/audio/bell', 'audio/ogg;base64',
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+'YII='
+);
+
+lib.resource.add('hterm/concat/date', 'text/plain',
+'Mon, 21 Jan 2019 20:18:45 +0000'
+);
+
+lib.resource.add('hterm/changelog/version', 'text/plain',
+'1.84'
+);
+
+lib.resource.add('hterm/changelog/date', 'text/plain',
+'2019-01-19'
+);
+
+lib.resource.add('hterm/git/HEAD', 'text/plain',
+'231ff3d044f0fb40bb205265c772f4caff141aae'
+);
+
+// This file was generated by libdot/bin/concat.sh.
+// It has been marked read-only for your safety. Rather than
+// edit it directly, please modify one of these source files.
+//
+// hterm/js/hterm.js
+// hterm/js/hterm_accessibility_reader.js
+// hterm/js/hterm_contextmenu.js
+// hterm/js/hterm_frame.js
+// hterm/js/hterm_keyboard.js
+// hterm/js/hterm_keyboard_bindings.js
+// hterm/js/hterm_keyboard_keymap.js
+// hterm/js/hterm_keyboard_keypattern.js
+// hterm/js/hterm_options.js
+// hterm/js/hterm_parser.js
+// hterm/js/hterm_parser_identifiers.js
+// hterm/js/hterm_preference_manager.js
+// hterm/js/hterm_pubsub.js
+// hterm/js/hterm_screen.js
+// hterm/js/hterm_scrollport.js
+// hterm/js/hterm_terminal.js
+// hterm/js/hterm_terminal_io.js
+// hterm/js/hterm_text_attributes.js
+// hterm/js/hterm_vt.js
+// hterm/js/hterm_vt_character_map.js
+// hterm/audio/bell.ogg
+// hterm/images/icon-96.png
+
+'use strict';
+
+// SOURCE FILE: hterm/js/hterm.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+lib.rtdep('lib.Storage');
+
+/**
+ * @fileoverview Declares the hterm.* namespace and some basic shared utilities
+ * that are too small to deserve dedicated files.
+ */
+var hterm = {};
+
+/**
+ * The type of window hosting hterm.
+ *
+ * This is set as part of hterm.init(). The value is invalid until
+ * initialization completes.
+ */
+hterm.windowType = null;
+
+/**
+ * The OS we're running under.
+ *
+ * Used when setting up OS-specific behaviors.
+ *
+ * This is set as part of hterm.init(). The value is invalid until
+ * initialization completes.
+ */
+hterm.os = null;
+
+/**
+ * Warning message to display in the terminal when browser zoom is enabled.
+ *
+ * You can replace it with your own localized message.
+ */
+hterm.zoomWarningMessage = 'ZOOM != 100%';
+
+/**
+ * Brief overlay message displayed when text is copied to the clipboard.
+ *
+ * By default it is the unicode BLACK SCISSORS character, but you can
+ * replace it with your own localized message.
+ *
+ * This is only displayed when the 'enable-clipboard-notice' preference
+ * is enabled.
+ */
+hterm.notifyCopyMessage = '\u2702';
+
+
+/**
+ * Text shown in a desktop notification for the terminal
+ * bell. \u226a is a unicode EIGHTH NOTE, %(title) will
+ * be replaced by the terminal title.
+ */
+hterm.desktopNotificationTitle = '\u266A %(title) \u266A';
+
+/**
+ * List of known hterm test suites.
+ *
+ * A test harness should ensure that they all exist before running.
+ */
+hterm.testDeps = ['hterm.AccessibilityReader.Tests', 'hterm.ScrollPort.Tests',
+ 'hterm.Screen.Tests', 'hterm.Terminal.Tests',
+ 'hterm.VT.Tests', 'hterm.VT.CannedTests'];
+
+/**
+ * The hterm init function, registered with lib.registerInit().
+ *
+ * This is called during lib.init().
+ *
+ * @param {function} onInit The function lib.init() wants us to invoke when
+ * initialization is complete.
+ */
+lib.registerInit('hterm', function(onInit) {
+ function initOs(os) {
+ hterm.os = os;
+
+ onInit();
+ }
+
+ function initMessageManager() {
+ lib.i18n.getAcceptLanguages((languages) => {
+ if (!hterm.messageManager)
+ hterm.messageManager = new lib.MessageManager(languages);
+
+ // If OS detection fails, then we'll still set the value to something.
+ // The OS logic in hterm tends to be best effort anyways.
+ lib.f.getOs().then(initOs).catch(initOs);
+ });
+ }
+
+ function onWindow(window) {
+ hterm.windowType = window.type;
+ initMessageManager();
+ }
+
+ function onTab(tab) {
+ if (tab && window.chrome) {
+ chrome.windows.get(tab.windowId, null, onWindow);
+ } else {
+ // TODO(rginda): This is where we end up for a v1 app's background page.
+ // Maybe windowType = 'none' would be more appropriate, or something.
+ hterm.windowType = 'normal';
+ initMessageManager();
+ }
+ }
+
+ if (!hterm.defaultStorage) {
+ if (window.chrome && chrome.storage && chrome.storage.sync) {
+ hterm.defaultStorage = new lib.Storage.Chrome(chrome.storage.sync);
+ } else {
+ hterm.defaultStorage = new lib.Storage.Local();
+ }
+ }
+
+ // The chrome.tabs API is not supported in packaged apps, and detecting if
+ // you're a packaged app is a little awkward.
+ var isPackagedApp = false;
+ if (window.chrome && chrome.runtime && chrome.runtime.getManifest) {
+ var manifest = chrome.runtime.getManifest();
+ isPackagedApp = manifest.app && manifest.app.background;
+ }
+
+ if (isPackagedApp) {
+ // Packaged apps are never displayed in browser tabs.
+ setTimeout(onWindow.bind(null, {type: 'popup'}), 0);
+ } else {
+ if (window.chrome && chrome.tabs) {
+ // The getCurrent method gets the tab that is "currently running", not the
+ // topmost or focused tab.
+ chrome.tabs.getCurrent(onTab);
+ } else {
+ setTimeout(onWindow.bind(null, {type: 'normal'}), 0);
+ }
+ }
+});
+
+/**
+ * Return decimal { width, height } for a given dom node.
+ */
+hterm.getClientSize = function(dom) {
+ return dom.getBoundingClientRect();
+};
+
+/**
+ * Return decimal width for a given dom node.
+ */
+hterm.getClientWidth = function(dom) {
+ return dom.getBoundingClientRect().width;
+};
+
+/**
+ * Return decimal height for a given dom node.
+ */
+hterm.getClientHeight = function(dom) {
+ return dom.getBoundingClientRect().height;
+};
+
+/**
+ * Copy the specified text to the system clipboard.
+ *
+ * We'll create selections on demand based on the content to copy.
+ *
+ * @param {HTMLDocument} document The document with the selection to copy.
+ * @param {string} str The string data to copy out.
+ */
+hterm.copySelectionToClipboard = function(document, str) {
+ // Request permission if need be.
+ const requestPermission = () => {
+ // Use the Permissions API if available.
+ if (navigator.permissions && navigator.permissions.query) {
+ return navigator.permissions.query({name: 'clipboard-write'})
+ .then((status) => {
+ const checkState = (resolve, reject) => {
+ switch (status.state) {
+ case 'granted':
+ return resolve();
+ case 'denied':
+ return reject();
+ default:
+ // Wait for the user to approve/disprove.
+ return new Promise((resolve, reject) => {
+ status.onchange = () => checkState(resolve, reject);
+ });
+ }
+ };
+
+ return new Promise(checkState);
+ })
+ // If the platform doesn't support "clipboard-write", or is denied,
+ // we move on to the copying step anyways.
+ .catch(() => Promise.resolve());
+ } else {
+ // No permissions API, so resolve right away.
+ return Promise.resolve();
+ }
+ };
+
+ // Write to the clipboard.
+ const writeClipboard = () => {
+ // Use the Clipboard API if available.
+ if (navigator.clipboard && navigator.clipboard.writeText) {
+ // If this fails (perhaps due to focus changing windows), fallback to the
+ // legacy copy method.
+ return navigator.clipboard.writeText(str)
+ .catch(execCommand);
+ } else {
+ // No Clipboard API, so use the old execCommand style.
+ return execCommand();
+ }
+ };
+
+ // Write to the clipboard using the legacy execCommand method.
+ // TODO: Once we can rely on the Clipboard API everywhere, we can simplify
+ // this a lot by deleting the custom selection logic.
+ const execCommand = () => {
+ const copySource = document.createElement('pre');
+ copySource.id = 'hterm:copy-to-clipboard-source';
+ copySource.textContent = str;
+ copySource.style.cssText = (
+ '-webkit-user-select: text;' +
+ '-moz-user-select: text;' +
+ 'position: absolute;' +
+ 'top: -99px');
+
+ document.body.appendChild(copySource);
+
+ const selection = document.getSelection();
+ const anchorNode = selection.anchorNode;
+ const anchorOffset = selection.anchorOffset;
+ const focusNode = selection.focusNode;
+ const focusOffset = selection.focusOffset;
+
+ // FF sometimes throws NS_ERROR_FAILURE exceptions when we make this call.
+ // Catch it because a failure here leaks the copySource node.
+ // https://bugzilla.mozilla.org/show_bug.cgi?id=1178676
+ try {
+ selection.selectAllChildren(copySource);
+ } catch (ex) {}
+
+ try {
+ document.execCommand('copy');
+ } catch (firefoxException) {
+ // Ignore this. FF throws an exception if there was an error, even
+ // though the spec says just return false.
+ }
+
+ // IE doesn't support selection.extend. This means that the selection won't
+ // return on IE.
+ if (selection.extend) {
+ // When running in the test harness, we won't have any related nodes.
+ if (anchorNode) {
+ selection.collapse(anchorNode, anchorOffset);
+ }
+ if (focusNode) {
+ selection.extend(focusNode, focusOffset);
+ }
+ }
+
+ copySource.parentNode.removeChild(copySource);
+
+ // Since execCommand is synchronous, resolve right away.
+ return Promise.resolve();
+ };
+
+ // Kick it all off!
+ return requestPermission().then(writeClipboard);
+};
+
+/**
+ * Paste the system clipboard into the element with focus.
+ *
+ * Note: In Chrome/Firefox app/extension environments, you'll need the
+ * "clipboardRead" permission. In other environments, this might always
+ * fail as the browser frequently blocks access for security reasons.
+ *
+ * @param {HTMLDocument} The document to paste into.
+ * @return {boolean} True if the paste succeeded.
+ */
+hterm.pasteFromClipboard = function(document) {
+ try {
+ return document.execCommand('paste');
+ } catch (firefoxException) {
+ // Ignore this. FF 40 and older would incorrectly throw an exception if
+ // there was an error instead of returning false.
+ return false;
+ }
+};
+
+/**
+ * Return a formatted message in the current locale.
+ *
+ * @param {string} name The name of the message to return.
+ * @param {Array<string>=} args The message arguments, if required.
+ * @param {string=} string The default message text.
+ * @return {string} The localized message.
+ */
+hterm.msg = function(name, args = [], string) {
+ return hterm.messageManager.get('HTERM_' + name, args, string);
+};
+
+/**
+ * Create a new notification.
+ *
+ * @param {Object} params Various parameters for the notification.
+ * @param {string} params.title The title (defaults to the window's title).
+ * @param {string} params.body The message body (main text).
+ */
+hterm.notify = function(params) {
+ var def = (curr, fallback) => curr !== undefined ? curr : fallback;
+ if (params === undefined || params === null)
+ params = {};
+
+ // Merge the user's choices with the default settings. We don't take it
+ // directly in case it was stuffed with excess junk.
+ var options = {
+ 'body': params.body,
+ 'icon': def(params.icon, lib.resource.getDataUrl('hterm/images/icon-96')),
+ };
+
+ var title = def(params.title, window.document.title);
+ if (!title)
+ title = 'hterm';
+ title = lib.f.replaceVars(hterm.desktopNotificationTitle, {'title': title});
+
+ var n = new Notification(title, options);
+ n.onclick = function() {
+ window.focus();
+ this.close();
+ };
+ return n;
+};
+
+/**
+ * Launches url in a new tab.
+ *
+ * @param {string} url URL to launch in a new tab.
+ */
+hterm.openUrl = function(url) {
+ if (window.chrome && chrome.browser && chrome.browser.openTab) {
+ // For Chrome v2 apps, we need to use this API to properly open windows.
+ chrome.browser.openTab({'url': url});
+ } else {
+ const win = lib.f.openWindow(url, '_blank');
+ win.focus();
+ }
+};
+
+/**
+ * Constructor for a hterm.Size record.
+ *
+ * Instances of this class have public read/write members for width and height.
+ *
+ * @param {integer} width The width of this record.
+ * @param {integer} height The height of this record.
+ */
+hterm.Size = function(width, height) {
+ this.width = width;
+ this.height = height;
+};
+
+/**
+ * Adjust the width and height of this record.
+ *
+ * @param {integer} width The new width of this record.
+ * @param {integer} height The new height of this record.
+ */
+hterm.Size.prototype.resize = function(width, height) {
+ this.width = width;
+ this.height = height;
+};
+
+/**
+ * Return a copy of this record.
+ *
+ * @return {hterm.Size} A new hterm.Size instance with the same width and
+ * height.
+ */
+hterm.Size.prototype.clone = function() {
+ return new hterm.Size(this.width, this.height);
+};
+
+/**
+ * Set the height and width of this instance based on another hterm.Size.
+ *
+ * @param {hterm.Size} that The object to copy from.
+ */
+hterm.Size.prototype.setTo = function(that) {
+ this.width = that.width;
+ this.height = that.height;
+};
+
+/**
+ * Test if another hterm.Size instance is equal to this one.
+ *
+ * @param {hterm.Size} that The other hterm.Size instance.
+ * @return {boolean} True if both instances have the same width/height, false
+ * otherwise.
+ */
+hterm.Size.prototype.equals = function(that) {
+ return this.width == that.width && this.height == that.height;
+};
+
+/**
+ * Return a string representation of this instance.
+ *
+ * @return {string} A string that identifies the width and height of this
+ * instance.
+ */
+hterm.Size.prototype.toString = function() {
+ return '[hterm.Size: ' + this.width + ', ' + this.height + ']';
+};
+
+/**
+ * Constructor for a hterm.RowCol record.
+ *
+ * Instances of this class have public read/write members for row and column.
+ *
+ * This class includes an 'overflow' bit which is use to indicate that an
+ * attempt has been made to move the cursor column passed the end of the
+ * screen. When this happens we leave the cursor column set to the last column
+ * of the screen but set the overflow bit. In this state cursor movement
+ * happens normally, but any attempt to print new characters causes a cr/lf
+ * first.
+ *
+ * @param {integer} row The row of this record.
+ * @param {integer} column The column of this record.
+ * @param {boolean} opt_overflow Optional boolean indicating that the RowCol
+ * has overflowed.
+ */
+hterm.RowCol = function(row, column, opt_overflow) {
+ this.row = row;
+ this.column = column;
+ this.overflow = !!opt_overflow;
+};
+
+/**
+ * Adjust the row and column of this record.
+ *
+ * @param {integer} row The new row of this record.
+ * @param {integer} column The new column of this record.
+ * @param {boolean} opt_overflow Optional boolean indicating that the RowCol
+ * has overflowed.
+ */
+hterm.RowCol.prototype.move = function(row, column, opt_overflow) {
+ this.row = row;
+ this.column = column;
+ this.overflow = !!opt_overflow;
+};
+
+/**
+ * Return a copy of this record.
+ *
+ * @return {hterm.RowCol} A new hterm.RowCol instance with the same row and
+ * column.
+ */
+hterm.RowCol.prototype.clone = function() {
+ return new hterm.RowCol(this.row, this.column, this.overflow);
+};
+
+/**
+ * Set the row and column of this instance based on another hterm.RowCol.
+ *
+ * @param {hterm.RowCol} that The object to copy from.
+ */
+hterm.RowCol.prototype.setTo = function(that) {
+ this.row = that.row;
+ this.column = that.column;
+ this.overflow = that.overflow;
+};
+
+/**
+ * Test if another hterm.RowCol instance is equal to this one.
+ *
+ * @param {hterm.RowCol} that The other hterm.RowCol instance.
+ * @return {boolean} True if both instances have the same row/column, false
+ * otherwise.
+ */
+hterm.RowCol.prototype.equals = function(that) {
+ return (this.row == that.row && this.column == that.column &&
+ this.overflow == that.overflow);
+};
+
+/**
+ * Return a string representation of this instance.
+ *
+ * @return {string} A string that identifies the row and column of this
+ * instance.
+ */
+hterm.RowCol.prototype.toString = function() {
+ return ('[hterm.RowCol: ' + this.row + ', ' + this.column + ', ' +
+ this.overflow + ']');
+};
+// SOURCE FILE: hterm/js/hterm_accessibility_reader.js
+// Copyright 2018 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * AccessibilityReader responsible for rendering command output for AT.
+ *
+ * Renders command output for Assistive Technology using a live region. We don't
+ * use the visible rows of the terminal for rendering command output to the
+ * screen reader because the rendered content may be different from what we want
+ * read out by a screen reader. For example, we may not actually render every
+ * row of a large piece of output to the screen as it wouldn't be performant.
+ * But we want the screen reader to read it all out in order.
+ *
+ * @param {HTMLDivElement} div The div element where the live region should be
+ * added.
+ */
+hterm.AccessibilityReader = function(div) {
+ this.document_ = div.ownerDocument;
+
+ // The live region element to add text to.
+ const liveRegion = this.document_.createElement('div');
+ liveRegion.id = 'hterm:accessibility-live-region';
+ liveRegion.style.cssText = `position: absolute;
+ width: 0; height: 0;
+ overflow: hidden;
+ left: 0; top: 0;`;
+ div.appendChild(liveRegion);
+
+ // Whether command output should be rendered for Assistive Technology.
+ // This isn't always enabled because it has an impact on performance.
+ this.accessibilityEnabled = false;
+
+ // This live element is used for command output.
+ this.liveElement_ = this.document_.createElement('p');
+ this.liveElement_.setAttribute('aria-live', 'polite');
+ this.liveElement_.setAttribute('aria-label', '');
+ liveRegion.appendChild(this.liveElement_);
+
+ // This live element is used for speaking out the current screen when
+ // navigating through the scrollback buffer. It will interrupt existing
+ // announcements.
+ this.assertiveLiveElement_ = this.document_.createElement('p');
+ this.assertiveLiveElement_.setAttribute('aria-live', 'assertive');
+ this.assertiveLiveElement_.setAttribute('aria-label', '');
+ liveRegion.appendChild(this.assertiveLiveElement_);
+
+ // A queue of updates to announce.
+ this.queue_ = [];
+
+ // A timer which tracks when next to add items to the live region. null when
+ // not running. This is used to combine updates that occur in a small window,
+ // as well as to avoid too much output being added to the live region in one
+ // go which can cause the renderer to hang.
+ this.nextReadTimer_ = null;
+
+ // This is set to true if the cursor is about to update position on the
+ // screen. i.e. beforeCursorChange has been called but not afterCursorChange.
+ this.cursorIsChanging_ = false;
+
+ // This tracks changes that would be added to queue_ while the cursor is
+ // changing. This is done so that we can decide to discard these changes if
+ // we announce something as a result of the cursor change.
+ this.cursorChangeQueue_ = [];
+
+ // The string of text on the row that the cursor was last on. Only valid while
+ // cursorIsChanging_ is true.
+ this.lastCursorRowString_ = null;
+
+ // The row that the cursor was last on. Only valid while cursorIsChanging_ is
+ // true.
+ this.lastCursorRow_ = null;
+
+ // The column that the cursor was last on. Only valid while cursorIsChanging_
+ // is true.
+ this.lastCursorColumn_ = null;
+
+ // True if a keypress has been performed since the last cursor change.
+ this.hasUserGesture = false;
+};
+
+/**
+ * Delay in ms to use for merging strings to output.
+ *
+ * We merge strings together to avoid hanging the terminal and to ensure that
+ * aria updates make it to the screen reader. We want this to be short so
+ * there's not a big delay between typing/executing commands and hearing output.
+ *
+ * @constant
+ * @type {integer}
+ */
+hterm.AccessibilityReader.DELAY = 50;
+
+/**
+ * Enable accessibility-friendly features that have a performance impact.
+ *
+ * @param {boolean} enabled Whether to enable accessibility-friendly features.
+ */
+hterm.AccessibilityReader.prototype.setAccessibilityEnabled =
+ function(enabled) {
+ if (!enabled) {
+ this.clear();
+ }
+
+ this.accessibilityEnabled = enabled;
+};
+
+/**
+ * Decorate the document where the terminal <x-screen> resides. This is needed
+ * for listening to keystrokes on the screen.
+ *
+ * @param {HTMLDocument} doc The document where the <x-screen> resides.
+ */
+hterm.AccessibilityReader.prototype.decorate = function(doc) {
+ const handlers = ['keydown', 'keypress', 'keyup', 'textInput'];
+ handlers.forEach((handler) => {
+ doc.addEventListener(handler, () => { this.hasUserGesture = true; });
+ });
+};
+
+/**
+ * This should be called before the cursor on the screen is about to get
+ * updated. This allows cursor changes to be tracked and related notifications
+ * to be announced.
+ *
+ * @param {string} cursorRowString The text in the row that the cursor is
+ * currently on.
+ * @param {integer} cursorRow The index of the row that the cursor is currently
+ * on, including rows in the scrollback buffer.
+ * @param {integer} cursorColumn The index of the column that the cursor is
+ * currently on.
+ */
+hterm.AccessibilityReader.prototype.beforeCursorChange =
+ function(cursorRowString, cursorRow, cursorColumn) {
+ // If accessibility is enabled we don't announce selection changes as these
+ // can have a performance impact.
+ if (!this.accessibilityEnabled) {
+ return;
+ }
+
+ // If there is no user gesture that can be tied to the cursor change, we
+ // don't want to announce anything.
+ if (!this.hasUserGesture || this.cursorIsChanging_) {
+ return;
+ }
+
+ this.cursorIsChanging_ = true;
+ this.lastCursorRowString_ = cursorRowString;
+ this.lastCursorRow_ = cursorRow;
+ this.lastCursorColumn_ = cursorColumn;
+};
+
+/**
+ * This should be called after the cursor on the screen has been updated. Note
+ * that several updates to the cursor may have happened between
+ * beforeCursorChange and afterCursorChange.
+ *
+ * This allows cursor changes to be tracked and related notifications to be
+ * announced.
+ *
+ * @param {string} cursorRowString The text in the row that the cursor is
+ * currently on.
+ * @param {integer} cursorRow The index of the row that the cursor is currently
+ * on, including rows in the scrollback buffer.
+ * @param {integer} cursorColumn The index of the column that the cursor is
+ * currently on.
+ */
+hterm.AccessibilityReader.prototype.afterCursorChange =
+ function(cursorRowString, cursorRow, cursorColumn) {
+ // This can happen if clear() is called midway through a cursor change.
+ if (!this.cursorIsChanging_) {
+ return;
+ }
+ this.cursorIsChanging_ = false;
+
+ if (!this.announceAction_(cursorRowString, cursorRow, cursorColumn)) {
+ // If we don't announce a special action, we re-queue all the output that
+ // was queued during the selection change.
+ for (let i = 0; i < this.cursorChangeQueue_.length; ++i) {
+ this.announce(this.cursorChangeQueue_[i]);
+ }
+ }
+
+ this.cursorChangeQueue_ = [];
+ this.lastCursorRowString_ = null;
+ this.lastCursorRow_ = null;
+ this.lastCursorColumn_ = null;
+ this.hasUserGesture = false;
+};
+
+/**
+ * Announce the command output.
+ *
+ * @param {string} str The string to announce using a live region.
+ */
+hterm.AccessibilityReader.prototype.announce = function(str) {
+ if (!this.accessibilityEnabled) {
+ return;
+ }
+
+ // If the cursor is in the middle of changing, we queue up the output
+ // separately as we may not want it to be announced if it's part of a cursor
+ // change announcement.
+ if (this.cursorIsChanging_) {
+ this.cursorChangeQueue_.push(str);
+ return;
+ }
+
+ // Don't append newlines to the queue if the queue is empty. It won't have any
+ // impact.
+ if (str == '\n' && this.queue_.length > 0) {
+ this.queue_.push('');
+ // We don't need to trigger an announcement on newlines because they won't
+ // change the existing content that's output.
+ return;
+ }
+
+ if (this.queue_.length == 0) {
+ this.queue_.push(str);
+ } else {
+ // We put a space between strings that appear on the same line.
+ // TODO(raymes): We should check the location on the row and not add a space
+ // if the strings are joined together.
+ let padding = '';
+ if (this.queue_[this.queue_.length - 1].length != 0) {
+ padding = ' ';
+ }
+ this.queue_[this.queue_.length - 1] += padding + str;
+ }
+
+ // If we've already scheduled text being added to the live region, wait for it
+ // to happen.
+ if (this.nextReadTimer_) {
+ return;
+ }
+
+ // If there's only one item in the queue, we may get other text being added
+ // very soon after. In that case, wait a small delay so we can merge the
+ // related strings.
+ if (this.queue_.length == 1) {
+ this.nextReadTimer_ = setTimeout(this.addToLiveRegion_.bind(this),
+ hterm.AccessibilityReader.DELAY);
+ } else {
+ throw new Error(
+ 'Expected only one item in queue_ or nextReadTimer_ to be running.');
+ }
+};
+
+/**
+ * Voice an announcement that will interrupt other announcements.
+ *
+ * @param {string} str The string to announce using a live region.
+ */
+hterm.AccessibilityReader.prototype.assertiveAnnounce = function(str) {
+ if (this.hasUserGesture && str == ' ') {
+ str = hterm.msg('SPACE_CHARACTER', [], 'Space');
+ }
+
+ // If the same string is announced twice, an attribute change won't be
+ // registered and the screen reader won't know that the string has changed.
+ // So we slightly change the string to ensure that the attribute change gets
+ // registered.
+ str = str.trim();
+ if (str == this.assertiveLiveElement_.getAttribute('aria-label')) {
+ str = '\n' + str;
+ }
+
+ this.clear();
+ this.assertiveLiveElement_.setAttribute('aria-label', str);
+};
+
+/**
+ * Add a newline to the text that will be announced to the live region.
+ */
+hterm.AccessibilityReader.prototype.newLine = function() {
+ this.announce('\n');
+};
+
+/**
+ * Clear the live region and any in-flight announcements.
+ */
+hterm.AccessibilityReader.prototype.clear = function() {
+ this.liveElement_.setAttribute('aria-label', '');
+ this.assertiveLiveElement_.setAttribute('aria-label', '');
+ clearTimeout(this.nextReadTimer_);
+ this.nextReadTimer_ = null;
+ this.queue_ = [];
+
+ this.cursorIsChanging_ = false;
+ this.cursorChangeQueue_ = [];
+ this.lastCursorRowString_ = null;
+ this.lastCursorRow_ = null;
+ this.lastCursorColumn_ = null;
+ this.hasUserGesture = false;
+};
+
+/**
+ * This will announce an action that is related to a cursor change, for example
+ * when the user deletes a character we want the character deleted to be
+ * announced. Similarly, when the user moves the cursor along the line, we want
+ * the characters selected to be announced.
+ *
+ * Note that this function is a heuristic. Because of the nature of terminal
+ * emulators, we can't distinguish input and output, which means we don't really
+ * know what output is the result of a keypress and what isn't. Also in some
+ * terminal applications certain announcements may make sense whereas others may
+ * not. This function should try to account for the most common cases.
+ *
+ * @param {string} cursorRowString The text in the row that the cursor is
+ * currently on.
+ * @param {integer} cursorRow The index of the row that the cursor is currently
+ * on, including rows in the scrollback buffer.
+ * @param {integer} cursorColumn The index of the column that the cursor is
+ * currently on.
+ */
+hterm.AccessibilityReader.prototype.announceAction_ =
+ function(cursorRowString, cursorRow, cursorColumn) {
+ // If the cursor changes rows, we don't announce anything at present.
+ if (this.lastCursorRow_ != cursorRow) {
+ return false;
+ }
+
+ // The case when the row of text hasn't changed at all.
+ if (this.lastCursorRowString_ == cursorRowString) {
+ // Moving the cursor along the line. We check that no significant changes
+ // have been queued. If they have, it may not just be a cursor movement and
+ // it may be better to read those out.
+ if (this.lastCursorColumn_ != cursorColumn &&
+ this.cursorChangeQueue_.join('').trim() == '') {
+ // Announce the text between the old cursor position and the new one.
+ const start = Math.min(this.lastCursorColumn_, cursorColumn);
+ const len = Math.abs(cursorColumn - this.lastCursorColumn_);
+ this.assertiveAnnounce(
+ lib.wc.substr(this.lastCursorRowString_, start, len));
+ return true;
+ }
+ return false;
+ }
+
+ // The case when the row of text has changed.
+ if (this.lastCursorRowString_ != cursorRowString) {
+ // Spacebar. We manually announce this character since the screen reader may
+ // not announce the whitespace in a live region.
+ if (this.lastCursorColumn_ + 1 == cursorColumn) {
+ if (lib.wc.substr(cursorRowString, cursorColumn - 1, 1) == ' ' &&
+ this.cursorChangeQueue_.length > 0 &&
+ this.cursorChangeQueue_[0] == ' ') {
+ this.assertiveAnnounce(' ');
+ return true;
+ }
+ }
+
+ // Backspace and deletion.
+ // The position of the characters deleted is right after the current
+ // position of the cursor in the case of backspace and delete.
+ const cursorDeleted = cursorColumn;
+ // Check that the current row string is shorter than the previous. Also
+ // check that the start of the strings (up to the cursor) match.
+ if (lib.wc.strWidth(cursorRowString) <=
+ lib.wc.strWidth(this.lastCursorRowString_) &&
+ lib.wc.substr(this.lastCursorRowString_, 0, cursorDeleted) ==
+ lib.wc.substr(cursorRowString, 0, cursorDeleted)) {
+ // Find the length of the current row string ignoring space characters.
+ // These may be inserted at the end of the string when deleting characters
+ // so they should be ignored.
+ let lengthOfCurrentRow = lib.wc.strWidth(cursorRowString);
+ for (; lengthOfCurrentRow > 0; --lengthOfCurrentRow) {
+ if (lengthOfCurrentRow == cursorDeleted ||
+ lib.wc.substr(cursorRowString, lengthOfCurrentRow - 1, 1) != ' ') {
+ break;
+ }
+ }
+
+ const numCharsDeleted =
+ lib.wc.strWidth(this.lastCursorRowString_) - lengthOfCurrentRow;
+
+ // Check that the end of the strings match.
+ const lengthOfEndOfString = lengthOfCurrentRow - cursorDeleted;
+ const endOfLastRowString = lib.wc.substr(
+ this.lastCursorRowString_, cursorDeleted + numCharsDeleted,
+ lengthOfEndOfString);
+ const endOfCurrentRowString =
+ lib.wc.substr(cursorRowString, cursorDeleted, lengthOfEndOfString);
+ if (endOfLastRowString == endOfCurrentRowString) {
+ const deleted = lib.wc.substr(
+ this.lastCursorRowString_, cursorDeleted, numCharsDeleted);
+ if (deleted != '') {
+ this.assertiveAnnounce(deleted);
+ return true;
+ }
+ }
+ }
+ return false;
+ }
+
+ return false;
+};
+
+/**
+ * Add text from queue_ to the live region.
+ *
+ */
+hterm.AccessibilityReader.prototype.addToLiveRegion_ = function() {
+ this.nextReadTimer_ = null;
+
+ let str = this.queue_.join('\n').trim();
+
+ // If the same string is announced twice, an attribute change won't be
+ // registered and the screen reader won't know that the string has changed.
+ // So we slightly change the string to ensure that the attribute change gets
+ // registered.
+ if (str == this.liveElement_.getAttribute('aria-label')) {
+ str = '\n' + str;
+ }
+
+ this.liveElement_.setAttribute('aria-label', str);
+ this.queue_ = [];
+};
+// SOURCE FILE: hterm/js/hterm_contextmenu.js
+// Copyright 2018 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @fileoverview Context menu handling.
+ */
+
+/**
+ * Manage the context menu usually shown when right clicking.
+ */
+hterm.ContextMenu = function() {
+ // The document that contains this context menu.
+ this.document_ = null;
+ // The generated context menu (i.e. HTML elements).
+ this.element_ = null;
+ // The structured menu (i.e. JS objects).
+ this.menu_ = [];
+};
+
+/**
+ * Constant to add a separator to the context menu.
+ */
+hterm.ContextMenu.SEPARATOR = {};
+
+/**
+ * Bind context menu to a specific document element.
+ *
+ * @param {HTMLDocument} document The document to use when creating elements.
+ */
+hterm.ContextMenu.prototype.setDocument = function(document) {
+ if (this.element_) {
+ this.element_.remove();
+ this.element_ = null;
+ }
+ this.document_ = document;
+ this.regenerate_();
+ this.document_.body.appendChild(this.element_);
+};
+
+/**
+ * Regenerate the HTML elements based on internal menu state.
+ */
+hterm.ContextMenu.prototype.regenerate_ = function() {
+ if (!this.element_) {
+ this.element_ = this.document_.createElement('menu');
+ this.element_.id = 'hterm:context-menu';
+ this.element_.style.cssText = `
+ display: none;
+ border: solid 1px;
+ position: absolute;
+ `;
+ } else {
+ this.hide();
+ }
+
+ // Clear out existing menu entries.
+ while (this.element_.firstChild) {
+ this.element_.removeChild(this.element_.firstChild);
+ }
+
+ this.menu_.forEach(([name, action]) => {
+ const menuitem = this.document_.createElement('menuitem');
+ if (name === hterm.ContextMenu.SEPARATOR) {
+ menuitem.innerHTML = '<hr>';
+ menuitem.className = 'separator';
+ } else {
+ menuitem.innerText = name;
+ menuitem.addEventListener('mousedown', function(e) {
+ e.preventDefault();
+ action(e);
+ });
+ }
+ this.element_.appendChild(menuitem);
+ });
+};
+
+/**
+ * Set all the entries in the context menu.
+ *
+ * This is an array of arrays. The first element in the array is the string to
+ * display while the second element is the function to call.
+ *
+ * The first element may also be the SEPARATOR constant to add a separator.
+ *
+ * This resets all existing menu entries.
+ *
+ * @param {Array<Array<string, function(Event)>>} items The menu entries.
+ */
+hterm.ContextMenu.prototype.setItems = function(items) {
+ this.menu_ = items;
+ this.regenerate_();
+};
+
+/**
+ * Show the context menu.
+ *
+ * The event is used to determine where to show the menu.
+ *
+ * If no menu entries are defined, then nothing will be shown.
+ *
+ * @param {Event} e The event triggering this display.
+ * @param {hterm.Terminal=} terminal The terminal object to get style info from.
+ */
+hterm.ContextMenu.prototype.show = function(e, terminal) {
+ // If there are no menu entries, then don't try to show anything.
+ if (this.menu_.length == 0) {
+ return;
+ }
+
+ // If we have the terminal, sync the style preferences over.
+ if (terminal) {
+ this.element_.style.backgroundColor = terminal.getBackgroundColor();
+ this.element_.style.color = terminal.getForegroundColor();
+ this.element_.style.fontSize = terminal.getFontSize();
+ this.element_.style.fontFamily = terminal.getFontFamily();
+ }
+
+ this.element_.style.top = `${e.clientY}px`;
+ this.element_.style.left = `${e.clientX}px`;
+ const docSize = hterm.getClientSize(this.document_.body);
+
+ this.element_.style.display = 'block';
+
+ // We can't calculate sizes until after it's displayed.
+ const eleSize = hterm.getClientSize(this.element_);
+ // Make sure the menu isn't clipped outside of the current element.
+ const minY = Math.max(0, docSize.height - eleSize.height);
+ const minX = Math.max(0, docSize.width - eleSize.width);
+ if (minY < e.clientY) {
+ this.element_.style.top = `${minY}px`;
+ }
+ if (minX < e.clientX) {
+ this.element_.style.left = `${minX}px`;
+ }
+};
+
+/**
+ * Hide the context menu.
+ */
+hterm.ContextMenu.prototype.hide = function() {
+ if (!this.element_) {
+ return;
+ }
+
+ this.element_.style.display = 'none';
+};
+// SOURCE FILE: hterm/js/hterm_frame.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+lib.rtdep('lib.f');
+
+/**
+ * First draft of the interface between the terminal and a third party dialog.
+ *
+ * This is rough. It's just the terminal->dialog layer. To complete things
+ * we'll also need a command->terminal layer. That will have to facilitate
+ * command->terminal->dialog or direct command->dialog communication.
+ *
+ * I imagine this class will change significantly when that happens.
+ */
+
+/**
+ * Construct a new frame for the given terminal.
+ *
+ * @param terminal {hterm.Terminal} The parent terminal object.
+ * @param url {String} The url to load in the frame.
+ * @param opt_options {Object} Optional options for the frame. Not implemented.
+ */
+hterm.Frame = function(terminal, url, opt_options) {
+ this.terminal_ = terminal;
+ this.div_ = terminal.div_;
+ this.url = url;
+ this.options = opt_options || {};
+ this.iframe_ = null;
+ this.container_ = null;
+ this.messageChannel_ = null;
+};
+
+/**
+ * Handle messages from the iframe.
+ */
+hterm.Frame.prototype.onMessage_ = function(e) {
+ switch (e.data.name) {
+ case 'ipc-init-ok':
+ // We get this response after we send them ipc-init and they finish.
+ this.sendTerminalInfo_();
+ return;
+ case 'terminal-info-ok':
+ // We get this response after we send them terminal-info and they finish.
+ // Show the finished frame, and then rebind our message handler to the
+ // callback below.
+ this.container_.style.display = 'flex';
+ this.postMessage('visible');
+ this.messageChannel_.port1.onmessage = this.onMessage.bind(this);
+ this.onLoad();
+ return;
+ default:
+ console.log('Unknown message from frame:', e.data);
+ return;
+ }
+};
+
+/**
+ * Clients could override this, I guess.
+ *
+ * It doesn't support multiple listeners, but I'm not sure that would make sense
+ * here. It's probably better to speak directly to our parents.
+ */
+hterm.Frame.prototype.onMessage = function() {};
+
+/**
+ * Handle iframe onLoad event.
+ */
+hterm.Frame.prototype.onLoad_ = function() {
+ this.messageChannel_ = new MessageChannel();
+ this.messageChannel_.port1.onmessage = this.onMessage_.bind(this);
+ this.messageChannel_.port1.start();
+ this.iframe_.contentWindow.postMessage(
+ {name: 'ipc-init', argv: [{messagePort: this.messageChannel_.port2}]},
+ this.url, [this.messageChannel_.port2]);
+};
+
+/**
+ * Clients may override this.
+ */
+hterm.Frame.prototype.onLoad = function() {};
+
+/**
+ * Sends the terminal-info message to the iframe.
+ */
+hterm.Frame.prototype.sendTerminalInfo_ = function() {
+ lib.i18n.getAcceptLanguages(function(languages) {
+ this.postMessage('terminal-info', [{
+ acceptLanguages: languages,
+ foregroundColor: this.terminal_.getForegroundColor(),
+ backgroundColor: this.terminal_.getBackgroundColor(),
+ cursorColor: this.terminal_.getCursorColor(),
+ fontSize: this.terminal_.getFontSize(),
+ fontFamily: this.terminal_.getFontFamily(),
+ baseURL: lib.f.getURL('/')
+ }]
+ );
+ }.bind(this));
+};
+
+/**
+ * User clicked the close button on the frame decoration.
+ */
+hterm.Frame.prototype.onCloseClicked_ = function() {
+ this.close();
+};
+
+/**
+ * Close this frame.
+ */
+hterm.Frame.prototype.close = function() {
+ if (!this.container_ || !this.container_.parentNode)
+ return;
+
+ this.container_.parentNode.removeChild(this.container_);
+ this.onClose();
+};
+
+
+/**
+ * Clients may override this.
+ */
+hterm.Frame.prototype.onClose = function() {};
+
+/**
+ * Send a message to the iframe.
+ */
+hterm.Frame.prototype.postMessage = function(name, argv) {
+ if (!this.messageChannel_)
+ throw new Error('Message channel is not set up.');
+
+ this.messageChannel_.port1.postMessage({name: name, argv: argv});
+};
+
+/**
+ * Show the UI for this frame.
+ *
+ * The iframe src is not loaded until this method is called.
+ */
+hterm.Frame.prototype.show = function() {
+ var self = this;
+
+ function opt(name, defaultValue) {
+ if (name in self.options)
+ return self.options[name];
+
+ return defaultValue;
+ }
+
+ var self = this;
+
+ if (this.container_ && this.container_.parentNode) {
+ console.error('Frame already visible');
+ return;
+ }
+
+ var headerHeight = '16px';
+
+ var divSize = hterm.getClientSize(this.div_);
+
+ var width = opt('width', 640);
+ var height = opt('height', 480);
+ var left = (divSize.width - width) / 2;
+ var top = (divSize.height - height) / 2;
+
+ var document = this.terminal_.document_;
+
+ var container = this.container_ = document.createElement('div');
+ container.style.cssText = (
+ 'position: absolute;' +
+ 'display: none;' +
+ 'flex-direction: column;' +
+ 'top: 10%;' +
+ 'left: 4%;' +
+ 'width: 90%;' +
+ 'height: 80%;' +
+ 'min-height: 20%;' +
+ 'max-height: 80%;' +
+ 'box-shadow: 0 0 2px ' + this.terminal_.getForegroundColor() + ';' +
+ 'border: 2px ' + this.terminal_.getForegroundColor() + ' solid;');
+
+ if (false) {
+ // No use for the close button, so no use for the window header either.
+ var header = document.createElement('div');
+ header.style.cssText = (
+ 'display: flex;' +
+ 'justify-content: flex-end;' +
+ 'height: ' + headerHeight + ';' +
+ 'background-color: ' + this.terminal_.getForegroundColor() + ';' +
+ 'color: ' + this.terminal_.getBackgroundColor() + ';' +
+ 'font-size: 16px;' +
+ 'font-family: ' + this.terminal_.getFontFamily());
+ container.appendChild(header);
+
+ var button = document.createElement('div');
+ button.setAttribute('role', 'button');
+ button.style.cssText = (
+ 'margin-top: -3px;' +
+ 'margin-right: 3px;' +
+ 'cursor: pointer;');
+ button.textContent = '\u2a2f';
+ button.addEventListener('click', this.onCloseClicked_.bind(this));
+ header.appendChild(button);
+ }
+
+ var iframe = this.iframe_ = document.createElement('iframe');
+ iframe.onload = this.onLoad_.bind(this);
+ iframe.style.cssText = (
+ 'display: flex;' +
+ 'flex: 1;' +
+ 'width: 100%');
+ iframe.setAttribute('src', this.url);
+ iframe.setAttribute('seamless', true);
+ container.appendChild(iframe);
+
+ this.div_.appendChild(container);
+};
+// SOURCE FILE: hterm/js/hterm_keyboard.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+lib.rtdep('hterm.Keyboard.KeyMap');
+
+/**
+ * Keyboard handler.
+ *
+ * Consumes onKey* events and invokes onVTKeystroke on the associated
+ * hterm.Terminal object.
+ *
+ * See also: [XTERM] as referenced in vt.js.
+ *
+ * @param {hterm.Terminal} The Terminal object associated with this keyboard.
+ */
+hterm.Keyboard = function(terminal) {
+ // The parent vt interpreter.
+ this.terminal = terminal;
+
+ // The element we're currently capturing keyboard events for.
+ this.keyboardElement_ = null;
+
+ // The event handlers we are interested in, and their bound callbacks, saved
+ // so they can be uninstalled with removeEventListener, when required.
+ this.handlers_ = [
+ ['focusout', this.onFocusOut_.bind(this)],
+ ['keydown', this.onKeyDown_.bind(this)],
+ ['keypress', this.onKeyPress_.bind(this)],
+ ['keyup', this.onKeyUp_.bind(this)],
+ ['textInput', this.onTextInput_.bind(this)]
+ ];
+
+ /**
+ * The current key map.
+ */
+ this.keyMap = new hterm.Keyboard.KeyMap(this);
+
+ this.bindings = new hterm.Keyboard.Bindings(this);
+
+ /**
+ * none: Disable any AltGr related munging.
+ * ctrl-alt: Assume Ctrl+Alt means AltGr.
+ * left-alt: Assume left Alt means AltGr.
+ * right-alt: Assume right Alt means AltGr.
+ */
+ this.altGrMode = 'none';
+
+ /**
+ * If true, Shift-Insert will fall through to the browser as a paste.
+ * If false, the keystroke will be sent to the host.
+ */
+ this.shiftInsertPaste = true;
+
+ /**
+ * If true, home/end will control the terminal scrollbar and shift home/end
+ * will send the VT keycodes. If false then home/end sends VT codes and
+ * shift home/end scrolls.
+ */
+ this.homeKeysScroll = false;
+
+ /**
+ * Same as above, except for page up/page down.
+ */
+ this.pageKeysScroll = false;
+
+ /**
+ * If true, Ctrl-Plus/Minus/Zero controls zoom.
+ * If false, Ctrl-Shift-Plus/Minus/Zero controls zoom, Ctrl-Minus sends ^_,
+ * Ctrl-Plus/Zero do nothing.
+ */
+ this.ctrlPlusMinusZeroZoom = true;
+
+ /**
+ * Ctrl+C copies if true, sends ^C to host if false.
+ * Ctrl+Shift+C sends ^C to host if true, copies if false.
+ */
+ this.ctrlCCopy = false;
+
+ /**
+ * Ctrl+V pastes if true, sends ^V to host if false.
+ * Ctrl+Shift+V sends ^V to host if true, pastes if false.
+ */
+ this.ctrlVPaste = false;
+
+ /**
+ * Enable/disable application keypad.
+ *
+ * This changes the way numeric keys are sent from the keyboard.
+ */
+ this.applicationKeypad = false;
+
+ /**
+ * Enable/disable the application cursor mode.
+ *
+ * This changes the way cursor keys are sent from the keyboard.
+ */
+ this.applicationCursor = false;
+
+ /**
+ * If true, the backspace should send BS ('\x08', aka ^H). Otherwise
+ * the backspace key should send '\x7f'.
+ */
+ this.backspaceSendsBackspace = false;
+
+ /**
+ * Set whether the meta key sends a leading escape or not.
+ */
+ this.metaSendsEscape = true;
+
+ /**
+ * Set whether meta-V gets passed to host.
+ */
+ this.passMetaV = true;
+
+ /**
+ * Controls how the alt key is handled.
+ *
+ * escape....... Send an ESC prefix.
+ * 8-bit........ Add 128 to the unshifted character as in xterm.
+ * browser-key.. Wait for the keypress event and see what the browser says.
+ * (This won't work well on platforms where the browser
+ * performs a default action for some alt sequences.)
+ *
+ * This setting only matters when alt is distinct from meta (altIsMeta is
+ * false.)
+ */
+ this.altSendsWhat = 'escape';
+
+ /**
+ * Set whether the alt key acts as a meta key, instead of producing 8-bit
+ * characters.
+ *
+ * True to enable, false to disable, null to autodetect based on platform.
+ */
+ this.altIsMeta = false;
+
+ /**
+ * If true, tries to detect DEL key events that are from alt-backspace on
+ * Chrome OS vs from a true DEL key press.
+ *
+ * Background: At the time of writing, on Chrome OS, alt-backspace is mapped
+ * to DEL. Some users may be happy with this, but others may be frustrated
+ * that it's impossible to do meta-backspace. If the user enables this pref,
+ * we use a trick to tell a true DEL keypress from alt-backspace: on
+ * alt-backspace, we will see the alt key go down, then get a DEL keystroke
+ * that indicates that alt is not pressed. See https://crbug.com/174410 .
+ */
+ this.altBackspaceIsMetaBackspace = false;
+
+ /**
+ * Used to keep track of the current alt-key state, which is necessary for
+ * the altBackspaceIsMetaBackspace preference above and for the altGrMode
+ * preference. This is a bitmap with where bit positions correspond to the
+ * "location" property of the key event.
+ */
+ this.altKeyPressed = 0;
+
+ /**
+ * If true, Chrome OS media keys will be mapped to their F-key equivalent.
+ * E.g. "Back" will be mapped to F1. If false, Chrome will handle the keys.
+ */
+ this.mediaKeysAreFKeys = false;
+
+ /**
+ * Holds the previous setting of altSendsWhat when DECSET 1039 is used. When
+ * DECRST 1039 is used, altSendsWhat is changed back to this and this is
+ * nulled out.
+ */
+ this.previousAltSendsWhat_ = null;
+};
+
+/**
+ * Special handling for keyCodes in a keyboard layout.
+ */
+hterm.Keyboard.KeyActions = {
+ /**
+ * Call preventDefault and stopPropagation for this key event and nothing
+ * else.
+ */
+ CANCEL: lib.f.createEnum('CANCEL'),
+
+ /**
+ * This performs the default terminal action for the key. If used in the
+ * 'normal' action and the the keystroke represents a printable key, the
+ * character will be sent to the host. If used in one of the modifier
+ * actions, the terminal will perform the normal action after (possibly)
+ * altering it.
+ *
+ * - If the normal sequence starts with CSI, the sequence will be adjusted
+ * to include the modifier parameter as described in [XTERM] in the final
+ * table of the "PC-Style Function Keys" section.
+ *
+ * - If the control key is down and the key represents a printable character,
+ * and the uppercase version of the unshifted keycap is between
+ * 64 (ASCII '@') and 95 (ASCII '_'), then the uppercase version of the
+ * unshifted keycap minus 64 is sent. This makes '^@' send '\x00' and
+ * '^_' send '\x1f'. (Note that one higher that 0x1f is 0x20, which is
+ * the first printable ASCII value.)
+ *
+ * - If the alt key is down and the key represents a printable character then
+ * the value of the character is shifted up by 128.
+ *
+ * - If meta is down and configured to send an escape, '\x1b' will be sent
+ * before the normal action is performed.
+ */
+ DEFAULT: lib.f.createEnum('DEFAULT'),
+
+ /**
+ * Causes the terminal to opt out of handling the key event, instead letting
+ * the browser deal with it.
+ */
+ PASS: lib.f.createEnum('PASS'),
+
+ /**
+ * Insert the first or second character of the keyCap, based on e.shiftKey.
+ * The key will be handled in onKeyDown, and e.preventDefault() will be
+ * called.
+ *
+ * It is useful for a modified key action, where it essentially strips the
+ * modifier while preventing the browser from reacting to the key.
+ */
+ STRIP: lib.f.createEnum('STRIP')
+};
+
+/**
+ * Capture keyboard events sent to the associated element.
+ *
+ * This enables the keyboard. Captured events are consumed by this class
+ * and will not perform their default action or bubble to other elements.
+ *
+ * Passing a null element will uninstall the keyboard handlers.
+ *
+ * @param {HTMLElement} element The element whose events should be captured, or
+ * null to disable the keyboard.
+ */
+hterm.Keyboard.prototype.installKeyboard = function(element) {
+ if (element == this.keyboardElement_)
+ return;
+
+ if (element && this.keyboardElement_)
+ this.installKeyboard(null);
+
+ for (var i = 0; i < this.handlers_.length; i++) {
+ var handler = this.handlers_[i];
+ if (element) {
+ element.addEventListener(handler[0], handler[1]);
+ } else {
+ this.keyboardElement_.removeEventListener(handler[0], handler[1]);
+ }
+ }
+
+ this.keyboardElement_ = element;
+};
+
+/**
+ * Disable keyboard event capture.
+ *
+ * This will allow the browser to process key events normally.
+ */
+hterm.Keyboard.prototype.uninstallKeyboard = function() {
+ this.installKeyboard(null);
+};
+
+/**
+ * Handle onTextInput events.
+ *
+ * These are generated when using IMEs, Virtual Keyboards (VKs), compose keys,
+ * Unicode input, etc...
+ */
+hterm.Keyboard.prototype.onTextInput_ = function(e) {
+ if (!e.data)
+ return;
+
+ // Just pass the generated buffer straight down. No need for us to split it
+ // up or otherwise parse it ahead of times.
+ this.terminal.onVTKeystroke(e.data);
+};
+
+/**
+ * Handle onKeyPress events.
+ *
+ * TODO(vapier): Drop this event entirely and only use keydown.
+ */
+hterm.Keyboard.prototype.onKeyPress_ = function(e) {
+ // FF doesn't set keyCode reliably in keypress events. Stick to the which
+ // field here until we can move to keydown entirely.
+ const key = String.fromCharCode(e.which).toLowerCase();
+ if ((e.ctrlKey || e.metaKey) && (key == 'c' || key == 'v')) {
+ // On FF the key press (not key down) event gets fired for copy/paste.
+ // Let it fall through for the default browser behavior.
+ return;
+ }
+
+ if (e.keyCode == 9 /* Tab */) {
+ // On FF, a key press event will be fired in addition of key down for the
+ // Tab key if key down isn't handled. This would only happen if a custom
+ // PASS binding has been created and therefore this should be handled by the
+ // browser.
+ return;
+ }
+
+ if (e.altKey && this.altSendsWhat == 'browser-key' && e.charCode == 0) {
+ // If we got here because we were expecting the browser to handle an
+ // alt sequence but it didn't do it, then we might be on an OS without
+ // an enabled IME system. In that case we fall back to xterm-like
+ // behavior.
+ //
+ // This happens here only as a fallback. Typically these platforms should
+ // set altSendsWhat to either 'escape' or '8-bit'.
+ var ch = String.fromCharCode(e.keyCode);
+ if (!e.shiftKey)
+ ch = ch.toLowerCase();
+
+ } else if (e.charCode >= 32) {
+ ch = e.charCode;
+ }
+
+ if (ch)
+ this.terminal.onVTKeystroke(String.fromCharCode(ch));
+
+ e.preventDefault();
+ e.stopPropagation();
+};
+
+/**
+ * Prevent default handling for non-ctrl-shifted event.
+ *
+ * When combined with Chrome permission 'app.window.fullscreen.overrideEsc',
+ * and called for both key down and key up events,
+ * the ESC key remains usable within fullscreen Chrome app windows.
+ */
+hterm.Keyboard.prototype.preventChromeAppNonCtrlShiftDefault_ = function(e) {
+ if (!window.chrome || !window.chrome.app || !window.chrome.app.window)
+ return;
+ if (!e.ctrlKey || !e.shiftKey)
+ e.preventDefault();
+};
+
+hterm.Keyboard.prototype.onFocusOut_ = function(e) {
+ this.altKeyPressed = 0;
+};
+
+hterm.Keyboard.prototype.onKeyUp_ = function(e) {
+ if (e.keyCode == 18)
+ this.altKeyPressed = this.altKeyPressed & ~(1 << (e.location - 1));
+
+ if (e.keyCode == 27)
+ this.preventChromeAppNonCtrlShiftDefault_(e);
+};
+
+/**
+ * Handle onKeyDown events.
+ */
+hterm.Keyboard.prototype.onKeyDown_ = function(e) {
+ if (e.keyCode == 18)
+ this.altKeyPressed = this.altKeyPressed | (1 << (e.location - 1));
+
+ if (e.keyCode == 27)
+ this.preventChromeAppNonCtrlShiftDefault_(e);
+
+ var keyDef = this.keyMap.keyDefs[e.keyCode];
+ if (!keyDef) {
+ // If this key hasn't been explicitly registered, fall back to the unknown
+ // key mapping (keyCode == 0), and then automatically register it to avoid
+ // any further warnings here.
+ console.warn(`No definition for key ${e.key} (keyCode ${e.keyCode})`);
+ keyDef = this.keyMap.keyDefs[0];
+ this.keyMap.addKeyDef(e.keyCode, keyDef);
+ }
+
+ // The type of action we're going to use.
+ var resolvedActionType = null;
+
+ var self = this;
+ function getAction(name) {
+ // Get the key action for the given action name. If the action is a
+ // function, dispatch it. If the action defers to the normal action,
+ // resolve that instead.
+
+ resolvedActionType = name;
+
+ var action = keyDef[name];
+ if (typeof action == 'function')
+ action = action.apply(self.keyMap, [e, keyDef]);
+
+ if (action === DEFAULT && name != 'normal')
+ action = getAction('normal');
+
+ return action;
+ }
+
+ // Note that we use the triple-equals ('===') operator to test equality for
+ // these constants, in order to distinguish usage of the constant from usage
+ // of a literal string that happens to contain the same bytes.
+ var CANCEL = hterm.Keyboard.KeyActions.CANCEL;
+ var DEFAULT = hterm.Keyboard.KeyActions.DEFAULT;
+ var PASS = hterm.Keyboard.KeyActions.PASS;
+ var STRIP = hterm.Keyboard.KeyActions.STRIP;
+
+ var control = e.ctrlKey;
+ var alt = this.altIsMeta ? false : e.altKey;
+ var meta = this.altIsMeta ? (e.altKey || e.metaKey) : e.metaKey;
+
+ // In the key-map, we surround the keyCap for non-printables in "[...]"
+ var isPrintable = !(/^\[\w+\]$/.test(keyDef.keyCap));
+
+ switch (this.altGrMode) {
+ case 'ctrl-alt':
+ if (isPrintable && control && alt) {
+ // ctrl-alt-printable means altGr. We clear out the control and
+ // alt modifiers and wait to see the charCode in the keydown event.
+ control = false;
+ alt = false;
+ }
+ break;
+
+ case 'right-alt':
+ if (isPrintable && (this.terminal.keyboard.altKeyPressed & 2)) {
+ control = false;
+ alt = false;
+ }
+ break;
+
+ case 'left-alt':
+ if (isPrintable && (this.terminal.keyboard.altKeyPressed & 1)) {
+ control = false;
+ alt = false;
+ }
+ break;
+ }
+
+ var action;
+
+ if (control) {
+ action = getAction('control');
+ } else if (alt) {
+ action = getAction('alt');
+ } else if (meta) {
+ action = getAction('meta');
+ } else {
+ action = getAction('normal');
+ }
+
+ // If e.maskShiftKey was set (during getAction) it means the shift key is
+ // already accounted for in the action, and we should not act on it any
+ // further. This is currently only used for Ctrl-Shift-Tab, which should send
+ // "CSI Z", not "CSI 1 ; 2 Z".
+ var shift = !e.maskShiftKey && e.shiftKey;
+
+ var keyDown = {
+ keyCode: e.keyCode,
+ shift: e.shiftKey, // not `var shift` from above.
+ ctrl: control,
+ alt: alt,
+ meta: meta
+ };
+
+ var binding = this.bindings.getBinding(keyDown);
+
+ if (binding) {
+ // Clear out the modifier bits so we don't try to munge the sequence
+ // further.
+ shift = control = alt = meta = false;
+ resolvedActionType = 'normal';
+ action = binding.action;
+
+ if (typeof action == 'function')
+ action = action.call(this, this.terminal, keyDown);
+ }
+
+ if (alt && this.altSendsWhat == 'browser-key' && action == DEFAULT) {
+ // When altSendsWhat is 'browser-key', we wait for the keypress event.
+ // In keypress, the browser should have set the event.charCode to the
+ // appropriate character.
+ // TODO(rginda): Character compositions will need some black magic.
+ action = PASS;
+ }
+
+ if (action === PASS || (action === DEFAULT && !(control || alt || meta))) {
+ // If this key is supposed to be handled by the browser, or it is an
+ // unmodified key with the default action, then exit this event handler.
+ // If it's an unmodified key, it'll be handled in onKeyPress where we
+ // can tell for sure which ASCII code to insert.
+ //
+ // This block needs to come before the STRIP test, otherwise we'll strip
+ // the modifier and think it's ok to let the browser handle the keypress.
+ // The browser won't know we're trying to ignore the modifiers and might
+ // perform some default action.
+ return;
+ }
+
+ if (action === STRIP) {
+ alt = control = false;
+ action = keyDef.normal;
+ if (typeof action == 'function')
+ action = action.apply(this.keyMap, [e, keyDef]);
+
+ if (action == DEFAULT && keyDef.keyCap.length == 2)
+ action = keyDef.keyCap.substr((shift ? 1 : 0), 1);
+ }
+
+ e.preventDefault();
+ e.stopPropagation();
+
+ if (action === CANCEL)
+ return;
+
+ if (action !== DEFAULT && typeof action != 'string') {
+ console.warn('Invalid action: ' + JSON.stringify(action));
+ return;
+ }
+
+ // Strip the modifier that is associated with the action, since we assume that
+ // modifier has already been accounted for in the action.
+ if (resolvedActionType == 'control') {
+ control = false;
+ } else if (resolvedActionType == 'alt') {
+ alt = false;
+ } else if (resolvedActionType == 'meta') {
+ meta = false;
+ }
+
+ if (action.substr(0, 2) == '\x1b[' && (alt || control || shift || meta)) {
+ // The action is an escape sequence that and it was triggered in the
+ // presence of a keyboard modifier, we may need to alter the action to
+ // include the modifier before sending it.
+
+ // The math is funky but aligns w/xterm.
+ let imod = 1;
+ if (shift)
+ imod += 1;
+ if (alt)
+ imod += 2;
+ if (control)
+ imod += 4;
+ if (meta)
+ imod += 8;
+ let mod = ';' + imod;
+
+ if (action.length == 3) {
+ // Some of the CSI sequences have zero parameters unless modified.
+ action = '\x1b[1' + mod + action.substr(2, 1);
+ } else {
+ // Others always have at least one parameter.
+ action = action.substr(0, action.length - 1) + mod +
+ action.substr(action.length - 1);
+ }
+
+ } else {
+ if (action === DEFAULT) {
+ action = keyDef.keyCap.substr((shift ? 1 : 0), 1);
+
+ if (control) {
+ var unshifted = keyDef.keyCap.substr(0, 1);
+ var code = unshifted.charCodeAt(0);
+ if (code >= 64 && code <= 95) {
+ action = String.fromCharCode(code - 64);
+ }
+ }
+ }
+
+ if (alt && this.altSendsWhat == '8-bit' && action.length == 1) {
+ var code = action.charCodeAt(0) + 128;
+ action = String.fromCharCode(code);
+ }
+
+ // We respect alt/metaSendsEscape even if the keymap action was a literal
+ // string. Otherwise, every overridden alt/meta action would have to
+ // check alt/metaSendsEscape.
+ if ((alt && this.altSendsWhat == 'escape') ||
+ (meta && this.metaSendsEscape)) {
+ action = '\x1b' + action;
+ }
+ }
+
+ this.terminal.onVTKeystroke(action);
+};
+// SOURCE FILE: hterm/js/hterm_keyboard_bindings.js
+// Copyright (c) 2015 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * A mapping from hterm.Keyboard.KeyPattern to an action.
+ *
+ * TODO(rginda): For now this bindings code is only used for user overrides.
+ * hterm.Keyboard.KeyMap still handles all of the built-in key mappings.
+ * It'd be nice if we migrated that over to be hterm.Keyboard.Bindings based.
+ */
+hterm.Keyboard.Bindings = function() {
+ this.bindings_ = {};
+};
+
+/**
+ * Remove all bindings.
+ */
+hterm.Keyboard.Bindings.prototype.clear = function () {
+ this.bindings_ = {};
+};
+
+/**
+ * Add a new binding.
+ *
+ * Internal API that assumes parsed objects as inputs.
+ * See the public addBinding for more details.
+ *
+ * @param {hterm.Keyboard.KeyPattern} keyPattern
+ * @param {string|function|hterm.Keyboard.KeyAction} action
+ */
+hterm.Keyboard.Bindings.prototype.addBinding_ = function(keyPattern, action) {
+ var binding = null;
+ var list = this.bindings_[keyPattern.keyCode];
+ if (list) {
+ for (var i = 0; i < list.length; i++) {
+ if (list[i].keyPattern.matchKeyPattern(keyPattern)) {
+ binding = list[i];
+ break;
+ }
+ }
+ }
+
+ if (binding) {
+ binding.action = action;
+ } else {
+ binding = {keyPattern: keyPattern, action: action};
+
+ if (!list) {
+ this.bindings_[keyPattern.keyCode] = [binding];
+ } else {
+ this.bindings_[keyPattern.keyCode].push(binding);
+
+ list.sort(function(a, b) {
+ return hterm.Keyboard.KeyPattern.sortCompare(
+ a.keyPattern, b.keyPattern);
+ });
+ }
+ }
+};
+
+/**
+ * Add a new binding.
+ *
+ * If a binding for the keyPattern already exists it will be overridden.
+ *
+ * More specific keyPatterns take precedence over those with wildcards. Given
+ * bindings for "Ctrl-A" and "Ctrl-*-A", and a "Ctrl-A" keydown, the "Ctrl-A"
+ * binding will match even if "Ctrl-*-A" was created last.
+ *
+ * If action is a string, it will be passed through hterm.Parser.parseKeyAction.
+ *
+ * For example:
+ * // Will replace Ctrl-P keystrokes with the string "hiya!".
+ * addBinding('Ctrl-P', "'hiya!'");
+ * // Will cancel the keystroke entirely (make it do nothing).
+ * addBinding('Alt-D', hterm.Keyboard.KeyActions.CANCEL);
+ * // Will execute the code and return the action.
+ * addBinding('Ctrl-T', function() {
+ * console.log('Got a T!');
+ * return hterm.Keyboard.KeyActions.PASS;
+ * });
+ *
+ * @param {string|hterm.Keyboard.KeyPattern} keyPattern
+ * @param {string|function|hterm.Keyboard.KeyAction} action
+ */
+hterm.Keyboard.Bindings.prototype.addBinding = function(key, action) {
+ // If we're given a hterm.Keyboard.KeyPattern object, pass it down.
+ if (typeof key != 'string') {
+ this.addBinding_(key, action);
+ return;
+ }
+
+ // Here we treat key as a string.
+ var p = new hterm.Parser();
+
+ p.reset(key);
+ var sequence;
+
+ try {
+ sequence = p.parseKeySequence();
+ } catch (ex) {
+ console.error(ex);
+ return;
+ }
+
+ if (!p.isComplete()) {
+ console.error(p.error('Expected end of sequence: ' + sequence));
+ return;
+ }
+
+ // If action is a string, parse it. Otherwise assume it's callable.
+ if (typeof action == 'string') {
+ p.reset(action);
+ try {
+ action = p.parseKeyAction();
+ } catch (ex) {
+ console.error(ex);
+ return;
+ }
+ }
+
+ if (!p.isComplete()) {
+ console.error(p.error('Expected end of sequence: ' + sequence));
+ return;
+ }
+
+ this.addBinding_(new hterm.Keyboard.KeyPattern(sequence), action);
+};
+
+/**
+ * Add multiple bindings at a time using a map of {string: string, ...}
+ *
+ * This uses hterm.Parser to parse the maps key into KeyPatterns, and the
+ * map values into {string|function|KeyAction}.
+ *
+ * For example:
+ * {
+ * // Will replace Ctrl-P keystrokes with the string "hiya!".
+ * 'Ctrl-P': "'hiya!'",
+ * // Will cancel the keystroke entirely (make it do nothing).
+ * 'Alt-D': hterm.Keyboard.KeyActions.CANCEL,
+ * }
+ *
+ * @param {Object} map
+ */
+hterm.Keyboard.Bindings.prototype.addBindings = function(map) {
+ for (var key in map) {
+ this.addBinding(key, map[key]);
+ }
+};
+
+/**
+ * Return the binding that is the best match for the given keyDown record,
+ * or null if there is no match.
+ *
+ * @param {Object} keyDown An object with a keyCode property and zero or
+ * more boolean properties representing key modifiers. These property names
+ * must match those defined in hterm.Keyboard.KeyPattern.modifiers.
+ */
+hterm.Keyboard.Bindings.prototype.getBinding = function(keyDown) {
+ var list = this.bindings_[keyDown.keyCode];
+ if (!list)
+ return null;
+
+ for (var i = 0; i < list.length; i++) {
+ var binding = list[i];
+ if (binding.keyPattern.matchKeyDown(keyDown))
+ return binding;
+ }
+
+ return null;
+};
+// SOURCE FILE: hterm/js/hterm_keyboard_keymap.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+lib.rtdep('hterm.Keyboard.KeyActions');
+
+/**
+ * The default key map for hterm.
+ *
+ * Contains a mapping of keyCodes to keyDefs (aka key definitions). The key
+ * definition tells the hterm.Keyboard class how to handle keycodes.
+ *
+ * This should work for most cases, as the printable characters get handled
+ * in the keypress event. In that case, even if the keycap is wrong in the
+ * key map, the correct character should be sent.
+ *
+ * Different layouts, such as Dvorak should work with this keymap, as those
+ * layouts typically move keycodes around on the keyboard without disturbing
+ * the actual keycaps.
+ *
+ * There may be issues with control keys on non-US keyboards or with keyboards
+ * that very significantly from the expectations here, in which case we may
+ * have to invent new key maps.
+ *
+ * The sequences defined in this key map come from [XTERM] as referenced in
+ * vt.js, starting with the section titled "Alt and Meta Keys".
+ */
+hterm.Keyboard.KeyMap = function(keyboard) {
+ this.keyboard = keyboard;
+ this.keyDefs = {};
+ this.reset();
+};
+
+/**
+ * Add a single key definition.
+ *
+ * The definition is an object containing the following fields: 'keyCap',
+ * 'normal', 'control', 'alt', and 'meta'.
+ *
+ * - keyCap is a string identifying the key on the keyboard. For printable
+ * keys, the key cap should be exactly two characters, starting with the
+ * unshifted version. For example, 'aA', 'bB', '1!' and '=+'. For
+ * non-printable the key cap should be surrounded in square braces, as in
+ * '[INS]', '[LEFT]'. By convention, non-printable keycaps are in uppercase
+ * but this is not a strict requirement.
+ *
+ * - Normal is the action that should be performed when the key is pressed
+ * in the absence of any modifier. See below for the supported actions.
+ *
+ * - Control is the action that should be performed when the key is pressed
+ * along with the control modifier. See below for the supported actions.
+ *
+ * - Alt is the action that should be performed when the key is pressed
+ * along with the alt modifier. See below for the supported actions.
+ *
+ * - Meta is the action that should be performed when the key is pressed
+ * along with the meta modifier. See below for the supported actions.
+ *
+ * Actions can be one of the hterm.Keyboard.KeyActions as documented below,
+ * a literal string, or an array. If the action is a literal string then
+ * the string is sent directly to the host. If the action is an array it
+ * is taken to be an escape sequence that may be altered by modifier keys.
+ * The second-to-last element of the array will be overwritten with the
+ * state of the modifier keys, as specified in the final table of "PC-Style
+ * Function Keys" from [XTERM].
+ */
+hterm.Keyboard.KeyMap.prototype.addKeyDef = function(keyCode, def) {
+ if (keyCode in this.keyDefs)
+ console.warn('Duplicate keyCode: ' + keyCode);
+
+ this.keyDefs[keyCode] = def;
+};
+
+/**
+ * Add multiple key definitions in a single call.
+ *
+ * This function takes the key definitions as variable argument list. Each
+ * argument is the key definition specified as an array.
+ *
+ * (If the function took everything as one big hash we couldn't detect
+ * duplicates, and there would be a lot more typing involved.)
+ *
+ * Each key definition should have 6 elements: (keyCode, keyCap, normal action,
+ * control action, alt action and meta action). See KeyMap.addKeyDef for the
+ * meaning of these elements.
+ */
+hterm.Keyboard.KeyMap.prototype.addKeyDefs = function(var_args) {
+ for (var i = 0; i < arguments.length; i++) {
+ this.addKeyDef(arguments[i][0],
+ { keyCap: arguments[i][1],
+ normal: arguments[i][2],
+ control: arguments[i][3],
+ alt: arguments[i][4],
+ meta: arguments[i][5]
+ });
+ }
+};
+
+/**
+ * Set up the default state for this keymap.
+ */
+hterm.Keyboard.KeyMap.prototype.reset = function() {
+ this.keyDefs = {};
+
+ var self = this;
+
+ // This function is used by the "macro" functions below. It makes it
+ // possible to use the call() macro as an argument to any other macro.
+ function resolve(action, e, k) {
+ if (typeof action == 'function')
+ return action.apply(self, [e, k]);
+
+ return action;
+ }
+
+ // If not application keypad a, else b. The keys that care about
+ // application keypad ignore it when the key is modified.
+ function ak(a, b) {
+ return function(e, k) {
+ var action = (e.shiftKey || e.ctrlKey || e.altKey || e.metaKey ||
+ !self.keyboard.applicationKeypad) ? a : b;
+ return resolve(action, e, k);
+ };
+ }
+
+ // If mod or not application cursor a, else b. The keys that care about
+ // application cursor ignore it when the key is modified.
+ function ac(a, b) {
+ return function(e, k) {
+ var action = (e.shiftKey || e.ctrlKey || e.altKey || e.metaKey ||
+ !self.keyboard.applicationCursor) ? a : b;
+ return resolve(action, e, k);
+ };
+ }
+
+ // If not backspace-sends-backspace keypad a, else b.
+ function bs(a, b) {
+ return function(e, k) {
+ var action = !self.keyboard.backspaceSendsBackspace ? a : b;
+ return resolve(action, e, k);
+ };
+ }
+
+ // If not e.shiftKey a, else b.
+ function sh(a, b) {
+ return function(e, k) {
+ var action = !e.shiftKey ? a : b;
+ e.maskShiftKey = true;
+ return resolve(action, e, k);
+ };
+ }
+
+ // If not e.altKey a, else b.
+ function alt(a, b) {
+ return function(e, k) {
+ var action = !e.altKey ? a : b;
+ return resolve(action, e, k);
+ };
+ }
+
+ // If no modifiers a, else b.
+ function mod(a, b) {
+ return function(e, k) {
+ var action = !(e.shiftKey || e.ctrlKey || e.altKey || e.metaKey) ? a : b;
+ return resolve(action, e, k);
+ };
+ }
+
+ // Compute a control character for a given character.
+ function ctl(ch) { return String.fromCharCode(ch.charCodeAt(0) - 64); }
+
+ // Call a method on the keymap instance.
+ function c(m) { return function(e, k) { return this[m](e, k); }; }
+
+ // Ignore if not trapping media keys.
+ function med(fn) {
+ return function(e, k) {
+ if (!self.keyboard.mediaKeysAreFKeys) {
+ // Block Back, Forward, and Reload keys to avoid navigating away from
+ // the current page.
+ return (e.keyCode == 166 || e.keyCode == 167 || e.keyCode == 168) ?
+ hterm.Keyboard.KeyActions.CANCEL :
+ hterm.Keyboard.KeyActions.PASS;
+ }
+ return resolve(fn, e, k);
+ };
+ }
+
+ // Browser-specific differences.
+ if (window.navigator && navigator.userAgent) {
+ if (navigator.userAgent.includes('Firefox')) {
+ // Firefox defines some keys uniquely. No other browser defines these is
+ // this way. Some even conflict. The keyCode field isn't well documented
+ // as it isn't standardized. At some point we should switch to "key".
+ // https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/keyCode
+ // http://unixpapa.com/js/key.html
+ var keycapMute = 181; // Mute
+ var keycapVolDn = 182; // Volume Down
+ var keycapVolUp = 183; // Volume Up
+ var keycapSC = 59; // ;:
+ var keycapEP = 61; // =+
+ var keycapMU = 173; // -_
+
+ this.addKeyDefs(
+ // Firefox Italian +*.
+ [171, '+*', DEFAULT, c('onPlusMinusZero_'), DEFAULT, c('onPlusMinusZero_')]
+ );
+ } else {
+ // All other browsers use these mappings.
+ var keycapMute = 173; // Mute
+ var keycapVolDn = 174; // Volume Down
+ var keycapVolUp = 175; // Volume Up
+ var keycapSC = 186; // ;:
+ var keycapEP = 187; // =+
+ var keycapMU = 189; // -_
+ }
+ }
+
+ var ESC = '\x1b';
+ var CSI = '\x1b[';
+ var SS3 = '\x1bO';
+
+ var CANCEL = hterm.Keyboard.KeyActions.CANCEL;
+ var DEFAULT = hterm.Keyboard.KeyActions.DEFAULT;
+ var PASS = hterm.Keyboard.KeyActions.PASS;
+ var STRIP = hterm.Keyboard.KeyActions.STRIP;
+
+ this.addKeyDefs(
+ // These fields are: [keycode, keycap, normal, control, alt, meta]
+
+ // The browser sends the keycode 0 for some keys. We'll just assume it's
+ // going to do the right thing by default for those keys.
+ [0, '[UNKNOWN]', PASS, PASS, PASS, PASS],
+
+ // First row.
+ // These bindings match xterm for lack of a better standard. The emitted
+ // values might look like they're skipping values, but it's what xterm does.
+ // https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-PC-Style-Function-Keys
+ [27, '[ESC]', ESC, DEFAULT, DEFAULT, DEFAULT],
+ [112, '[F1]', mod(SS3 + 'P', CSI + 'P'), DEFAULT, CSI + "23~", DEFAULT],
+ [113, '[F2]', mod(SS3 + 'Q', CSI + 'Q'), DEFAULT, CSI + "24~", DEFAULT],
+ [114, '[F3]', mod(SS3 + 'R', CSI + 'R'), DEFAULT, CSI + "25~", DEFAULT],
+ [115, '[F4]', mod(SS3 + 'S', CSI + 'S'), DEFAULT, CSI + "26~", DEFAULT],
+ [116, '[F5]', CSI + '15~', DEFAULT, CSI + "28~", DEFAULT],
+ [117, '[F6]', CSI + '17~', DEFAULT, CSI + "29~", DEFAULT],
+ [118, '[F7]', CSI + '18~', DEFAULT, CSI + "31~", DEFAULT],
+ [119, '[F8]', CSI + '19~', DEFAULT, CSI + "32~", DEFAULT],
+ [120, '[F9]', CSI + '20~', DEFAULT, CSI + "33~", DEFAULT],
+ [121, '[F10]', CSI + '21~', DEFAULT, CSI + "34~", DEFAULT],
+ [122, '[F11]', c('onF11_'), DEFAULT, CSI + "42~", DEFAULT],
+ [123, '[F12]', CSI + '24~', DEFAULT, CSI + "43~", DEFAULT],
+
+ // Second row.
+ [192, '`~', DEFAULT, sh(ctl('@'), ctl('^')), DEFAULT, PASS],
+ [49, '1!', DEFAULT, c('onCtrlNum_'), c('onAltNum_'), c('onMetaNum_')],
+ [50, '2@', DEFAULT, c('onCtrlNum_'), c('onAltNum_'), c('onMetaNum_')],
+ [51, '3#', DEFAULT, c('onCtrlNum_'), c('onAltNum_'), c('onMetaNum_')],
+ [52, '4$', DEFAULT, c('onCtrlNum_'), c('onAltNum_'), c('onMetaNum_')],
+ [53, '5%', DEFAULT, c('onCtrlNum_'), c('onAltNum_'), c('onMetaNum_')],
+ [54, '6^', DEFAULT, c('onCtrlNum_'), c('onAltNum_'), c('onMetaNum_')],
+ [55, '7&', DEFAULT, c('onCtrlNum_'), c('onAltNum_'), c('onMetaNum_')],
+ [56, '8*', DEFAULT, c('onCtrlNum_'), c('onAltNum_'), c('onMetaNum_')],
+ [57, '9(', DEFAULT, c('onCtrlNum_'), c('onAltNum_'), c('onMetaNum_')],
+ [48, '0)', DEFAULT, c('onPlusMinusZero_'),c('onAltNum_'),c('onPlusMinusZero_')],
+ [keycapMU, '-_', DEFAULT, c('onPlusMinusZero_'), DEFAULT, c('onPlusMinusZero_')],
+ [keycapEP, '=+', DEFAULT, c('onPlusMinusZero_'), DEFAULT, c('onPlusMinusZero_')],
+
+ [8, '[BKSP]', bs('\x7f', '\b'), bs('\b', '\x7f'), DEFAULT, DEFAULT],
+
+ // Third row.
+ [9, '[TAB]', sh('\t', CSI + 'Z'), STRIP, PASS, DEFAULT],
+ [81, 'qQ', DEFAULT, ctl('Q'), DEFAULT, DEFAULT],
+ [87, 'wW', DEFAULT, ctl('W'), DEFAULT, DEFAULT],
+ [69, 'eE', DEFAULT, ctl('E'), DEFAULT, DEFAULT],
+ [82, 'rR', DEFAULT, ctl('R'), DEFAULT, DEFAULT],
+ [84, 'tT', DEFAULT, ctl('T'), DEFAULT, DEFAULT],
+ [89, 'yY', DEFAULT, ctl('Y'), DEFAULT, DEFAULT],
+ [85, 'uU', DEFAULT, ctl('U'), DEFAULT, DEFAULT],
+ [73, 'iI', DEFAULT, ctl('I'), DEFAULT, DEFAULT],
+ [79, 'oO', DEFAULT, ctl('O'), DEFAULT, DEFAULT],
+ [80, 'pP', DEFAULT, ctl('P'), DEFAULT, DEFAULT],
+ [219, '[{', DEFAULT, ctl('['), DEFAULT, DEFAULT],
+ [221, ']}', DEFAULT, ctl(']'), DEFAULT, DEFAULT],
+ [220, '\\|', DEFAULT, ctl('\\'), DEFAULT, DEFAULT],
+
+ // Fourth row. (We let Ctrl-Shift-J pass for Chrome DevTools.)
+ [20, '[CAPS]', PASS, PASS, PASS, DEFAULT],
+ [65, 'aA', DEFAULT, ctl('A'), DEFAULT, DEFAULT],
+ [83, 'sS', DEFAULT, ctl('S'), DEFAULT, DEFAULT],
+ [68, 'dD', DEFAULT, ctl('D'), DEFAULT, DEFAULT],
+ [70, 'fF', DEFAULT, ctl('F'), DEFAULT, DEFAULT],
+ [71, 'gG', DEFAULT, ctl('G'), DEFAULT, DEFAULT],
+ [72, 'hH', DEFAULT, ctl('H'), DEFAULT, DEFAULT],
+ [74, 'jJ', DEFAULT, sh(ctl('J'), PASS), DEFAULT, DEFAULT],
+ [75, 'kK', DEFAULT, sh(ctl('K'), c('onClear_')), DEFAULT, DEFAULT],
+ [76, 'lL', DEFAULT, sh(ctl('L'), PASS), DEFAULT, DEFAULT],
+ [keycapSC, ';:', DEFAULT, STRIP, DEFAULT, DEFAULT],
+ [222, '\'"', DEFAULT, STRIP, DEFAULT, DEFAULT],
+ [13, '[ENTER]', '\r', CANCEL, CANCEL, DEFAULT],
+
+ // Fifth row. This includes the copy/paste shortcuts. On some
+ // platforms it's Ctrl-C/V, on others it's Meta-C/V. We assume either
+ // Ctrl-C/Meta-C should pass to the browser when there is a selection,
+ // and Ctrl-Shift-V/Meta-*-V should always pass to the browser (since
+ // these seem to be recognized as paste too).
+ [16, '[SHIFT]', PASS, PASS, PASS, DEFAULT],
+ [90, 'zZ', DEFAULT, ctl('Z'), DEFAULT, DEFAULT],
+ [88, 'xX', DEFAULT, ctl('X'), DEFAULT, DEFAULT],
+ [67, 'cC', DEFAULT, c('onCtrlC_'), DEFAULT, c('onMetaC_')],
+ [86, 'vV', DEFAULT, c('onCtrlV_'), DEFAULT, c('onMetaV_')],
+ [66, 'bB', DEFAULT, sh(ctl('B'), PASS), DEFAULT, sh(DEFAULT, PASS)],
+ [78, 'nN', DEFAULT, c('onCtrlN_'), DEFAULT, c('onMetaN_')],
+ [77, 'mM', DEFAULT, ctl('M'), DEFAULT, DEFAULT],
+ [188, ',<', DEFAULT, alt(STRIP, PASS), DEFAULT, DEFAULT],
+ [190, '.>', DEFAULT, alt(STRIP, PASS), DEFAULT, DEFAULT],
+ [191, '/?', DEFAULT, sh(ctl('_'), ctl('?')), DEFAULT, DEFAULT],
+
+ // Sixth and final row.
+ [17, '[CTRL]', PASS, PASS, PASS, PASS],
+ [18, '[ALT]', PASS, PASS, PASS, PASS],
+ [91, '[LAPL]', PASS, PASS, PASS, PASS],
+ [32, ' ', DEFAULT, ctl('@'), DEFAULT, DEFAULT],
+ [92, '[RAPL]', PASS, PASS, PASS, PASS],
+ [93, '[RMENU]', PASS, PASS, PASS, PASS],
+
+ // These things.
+ [42, '[PRTSCR]', PASS, PASS, PASS, PASS],
+ [145, '[SCRLK]', PASS, PASS, PASS, PASS],
+ [19, '[BREAK]', PASS, PASS, PASS, PASS],
+
+ // The block of six keys above the arrows.
+ [45, '[INSERT]', c('onKeyInsert_'), DEFAULT, DEFAULT, DEFAULT],
+ [36, '[HOME]', c('onKeyHome_'), DEFAULT, DEFAULT, DEFAULT],
+ [33, '[PGUP]', c('onKeyPageUp_'), DEFAULT, DEFAULT, DEFAULT],
+ [46, '[DEL]', c('onKeyDel_'), DEFAULT, DEFAULT, DEFAULT],
+ [35, '[END]', c('onKeyEnd_'), DEFAULT, DEFAULT, DEFAULT],
+ [34, '[PGDOWN]', c('onKeyPageDown_'), DEFAULT, DEFAULT, DEFAULT],
+
+ // Arrow keys. When unmodified they respect the application cursor state,
+ // otherwise they always send the CSI codes.
+ [38, '[UP]', c('onKeyArrowUp_'), DEFAULT, DEFAULT, DEFAULT],
+ [40, '[DOWN]', c('onKeyArrowDown_'), DEFAULT, DEFAULT, DEFAULT],
+ [39, '[RIGHT]', ac(CSI + 'C', SS3 + 'C'), DEFAULT, DEFAULT, DEFAULT],
+ [37, '[LEFT]', ac(CSI + 'D', SS3 + 'D'), DEFAULT, DEFAULT, DEFAULT],
+
+ [144, '[NUMLOCK]', PASS, PASS, PASS, PASS],
+
+ // On Apple keyboards, the NumLock key is a Clear key. It also tends to be
+ // what KP5 sends when numlock is off. Not clear if we could do anything
+ // useful with it, so just pass it along.
+ [12, '[CLEAR]', PASS, PASS, PASS, PASS],
+
+ // With numlock off, the keypad generates the same key codes as the arrows
+ // and 'block of six' for some keys, and null key codes for the rest.
+
+ // Keypad with numlock on generates unique key codes...
+ [96, '[KP0]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
+ [97, '[KP1]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
+ [98, '[KP2]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
+ [99, '[KP3]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
+ [100, '[KP4]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
+ [101, '[KP5]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
+ [102, '[KP6]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
+ [103, '[KP7]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
+ [104, '[KP8]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
+ [105, '[KP9]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
+ [107, '[KP+]', DEFAULT, c('onPlusMinusZero_'), DEFAULT, c('onPlusMinusZero_')],
+ [109, '[KP-]', DEFAULT, c('onPlusMinusZero_'), DEFAULT, c('onPlusMinusZero_')],
+ [106, '[KP*]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
+ [111, '[KP/]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
+ [110, '[KP.]', DEFAULT, DEFAULT, DEFAULT, DEFAULT]
+ );
+
+ // OS-specific differences.
+ if (hterm.os == 'cros') {
+ this.addKeyDefs(
+ // Chrome OS keyboard top row. The media-keys-are-fkeys preference allows
+ // users to make these always behave as function keys (see those bindings
+ // above for more details).
+ [166, '[BACK]', med(mod(SS3+'P', CSI+'P')), DEFAULT, CSI+'23~', DEFAULT], // F1
+ [167, '[FWD]', med(mod(SS3+'Q', CSI+'Q')), DEFAULT, CSI+'24~', DEFAULT], // F2
+ [168, '[RELOAD]', med(mod(SS3+'R', CSI+'R')), DEFAULT, CSI+'25~', DEFAULT], // F3
+ [183, '[FSCR]', med(mod(SS3+'S', CSI+'S')), DEFAULT, CSI+'26~', DEFAULT], // F4
+ [182, '[WINS]', med(CSI + '15~'), DEFAULT, CSI+'28~', DEFAULT], // F5
+ [216, '[BRIT-]', med(CSI + '17~'), DEFAULT, CSI+'29~', DEFAULT], // F6
+ [217, '[BRIT+]', med(CSI + '18~'), DEFAULT, CSI+'31~', DEFAULT], // F7
+ [173, '[MUTE]', med(CSI + '19~'), DEFAULT, CSI+'32~', DEFAULT], // F8
+ [174, '[VOL-]', med(CSI + '20~'), DEFAULT, CSI+'33~', DEFAULT], // F9
+ [175, '[VOL+]', med(CSI + '21~'), DEFAULT, CSI+'34~', DEFAULT], // F10
+
+ // We could make this into F11, but it'd be a bit weird. Chrome allows us
+ // to see this and react, but it doesn't actually allow us to block or
+ // cancel it, so it makes the screen flash/lock still.
+ [152, '[POWER]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
+
+ // The Pixelbook has a slightly different layout. This means half the keys
+ // above are off by one. https://crbug.com/807513
+ [179, '[PLAY]', med(CSI + '18~'), DEFAULT, CSI + '31~', DEFAULT], // F7
+ // The settings / hamburgers / three hot dogs / menu / whatever-it's-called.
+ [154, '[DOGS]', med(CSI + '23~'), DEFAULT, CSI + '42~', DEFAULT], // F11
+
+ // We don't use this for anything, but keep it from popping up by default.
+ [153, '[ASSIST]', DEFAULT, DEFAULT, DEFAULT, DEFAULT]
+ );
+ }
+};
+
+/**
+ * Either allow the paste or send a key sequence.
+ */
+hterm.Keyboard.KeyMap.prototype.onKeyInsert_ = function(e) {
+ if (this.keyboard.shiftInsertPaste && e.shiftKey)
+ return hterm.Keyboard.KeyActions.PASS;
+
+ return '\x1b[2~';
+};
+
+/**
+ * Either scroll the scrollback buffer or send a key sequence.
+ */
+hterm.Keyboard.KeyMap.prototype.onKeyHome_ = function(e) {
+ if (!this.keyboard.homeKeysScroll ^ e.shiftKey) {
+ if ((e.altey || e.ctrlKey || e.shiftKey) ||
+ !this.keyboard.applicationCursor) {
+ return '\x1b[H';
+ }
+
+ return '\x1bOH';
+ }
+
+ this.keyboard.terminal.scrollHome();
+ return hterm.Keyboard.KeyActions.CANCEL;
+};
+
+/**
+ * Either scroll the scrollback buffer or send a key sequence.
+ */
+hterm.Keyboard.KeyMap.prototype.onKeyEnd_ = function(e) {
+ if (!this.keyboard.homeKeysScroll ^ e.shiftKey) {
+ if ((e.altKey || e.ctrlKey || e.shiftKey) ||
+ !this.keyboard.applicationCursor) {
+ return '\x1b[F';
+ }
+
+ return '\x1bOF';
+ }
+
+ this.keyboard.terminal.scrollEnd();
+ return hterm.Keyboard.KeyActions.CANCEL;
+};
+
+/**
+ * Either scroll the scrollback buffer or send a key sequence.
+ */
+hterm.Keyboard.KeyMap.prototype.onKeyPageUp_ = function(e) {
+ if (!this.keyboard.pageKeysScroll ^ e.shiftKey)
+ return '\x1b[5~';
+
+ this.keyboard.terminal.scrollPageUp();
+ return hterm.Keyboard.KeyActions.CANCEL;
+};
+
+/**
+ * Either send a true DEL, or sub in meta-backspace.
+ *
+ * On Chrome OS, if we know the alt key is down, but we get a DEL event that
+ * claims that the alt key is not pressed, we know the DEL was a synthetic
+ * one from a user that hit alt-backspace. Based on a user pref, we can sub
+ * in meta-backspace in this case.
+ */
+hterm.Keyboard.KeyMap.prototype.onKeyDel_ = function(e) {
+ if (this.keyboard.altBackspaceIsMetaBackspace &&
+ this.keyboard.altKeyPressed && !e.altKey)
+ return '\x1b\x7f';
+ return '\x1b[3~';
+};
+
+/**
+ * Either scroll the scrollback buffer or send a key sequence.
+ */
+hterm.Keyboard.KeyMap.prototype.onKeyPageDown_ = function(e) {
+ if (!this.keyboard.pageKeysScroll ^ e.shiftKey)
+ return '\x1b[6~';
+
+ this.keyboard.terminal.scrollPageDown();
+ return hterm.Keyboard.KeyActions.CANCEL;
+};
+
+/**
+ * Either scroll the scrollback buffer or send a key sequence.
+ */
+hterm.Keyboard.KeyMap.prototype.onKeyArrowUp_ = function(e) {
+ if (!this.keyboard.applicationCursor && e.shiftKey) {
+ this.keyboard.terminal.scrollLineUp();
+ return hterm.Keyboard.KeyActions.CANCEL;
+ }
+
+ return (e.shiftKey || e.ctrlKey || e.altKey || e.metaKey ||
+ !this.keyboard.applicationCursor) ? '\x1b[A' : '\x1bOA';
+};
+
+/**
+ * Either scroll the scrollback buffer or send a key sequence.
+ */
+hterm.Keyboard.KeyMap.prototype.onKeyArrowDown_ = function(e) {
+ if (!this.keyboard.applicationCursor && e.shiftKey) {
+ this.keyboard.terminal.scrollLineDown();
+ return hterm.Keyboard.KeyActions.CANCEL;
+ }
+
+ return (e.shiftKey || e.ctrlKey || e.altKey || e.metaKey ||
+ !this.keyboard.applicationCursor) ? '\x1b[B' : '\x1bOB';
+};
+
+/**
+ * Clear the primary/alternate screens and the scrollback buffer.
+ */
+hterm.Keyboard.KeyMap.prototype.onClear_ = function(e, keyDef) {
+ this.keyboard.terminal.wipeContents();
+ return hterm.Keyboard.KeyActions.CANCEL;
+};
+
+/**
+ * Handle F11 behavior (fullscreen) when not in a window.
+ *
+ * It would be nice to use the Fullscreen API, but the UX is slightly different
+ * a bad way: the Escape key is automatically registered for exiting. If we let
+ * the browser handle F11 directly though, we still get to capture Escape.
+ */
+hterm.Keyboard.KeyMap.prototype.onF11_ = function(e, keyDef) {
+ if (hterm.windowType != 'popup')
+ return hterm.Keyboard.KeyActions.PASS;
+ else
+ return '\x1b[23~';
+};
+
+/**
+ * Either pass Ctrl-1..9 to the browser or send them to the host.
+ *
+ * Note that Ctrl-1 and Ctrl-9 don't actually have special sequences mapped
+ * to them in xterm or gnome-terminal. The range is really Ctrl-2..8, but
+ * we handle 1..9 since Chrome treats the whole range special.
+ */
+hterm.Keyboard.KeyMap.prototype.onCtrlNum_ = function(e, keyDef) {
+ // Compute a control character for a given character.
+ function ctl(ch) { return String.fromCharCode(ch.charCodeAt(0) - 64); }
+
+ if (this.keyboard.terminal.passCtrlNumber && !e.shiftKey)
+ return hterm.Keyboard.KeyActions.PASS;
+
+ switch (keyDef.keyCap.substr(0, 1)) {
+ case '1': return '1';
+ case '2': return ctl('@');
+ case '3': return ctl('[');
+ case '4': return ctl('\\');
+ case '5': return ctl(']');
+ case '6': return ctl('^');
+ case '7': return ctl('_');
+ case '8': return '\x7f';
+ case '9': return '9';
+ }
+};
+
+/**
+ * Either pass Alt-1..9 to the browser or send them to the host.
+ */
+hterm.Keyboard.KeyMap.prototype.onAltNum_ = function(e, keyDef) {
+ if (this.keyboard.terminal.passAltNumber && !e.shiftKey)
+ return hterm.Keyboard.KeyActions.PASS;
+
+ return hterm.Keyboard.KeyActions.DEFAULT;
+};
+
+/**
+ * Either pass Meta-1..9 to the browser or send them to the host.
+ */
+hterm.Keyboard.KeyMap.prototype.onMetaNum_ = function(e, keyDef) {
+ if (this.keyboard.terminal.passMetaNumber && !e.shiftKey)
+ return hterm.Keyboard.KeyActions.PASS;
+
+ return hterm.Keyboard.KeyActions.DEFAULT;
+};
+
+/**
+ * Either send a ^C or interpret the keystroke as a copy command.
+ */
+hterm.Keyboard.KeyMap.prototype.onCtrlC_ = function(e, keyDef) {
+ var selection = this.keyboard.terminal.getDocument().getSelection();
+
+ if (!selection.isCollapsed) {
+ if (this.keyboard.ctrlCCopy && !e.shiftKey) {
+ // Ctrl-C should copy if there is a selection, send ^C otherwise.
+ // Perform the copy by letting the browser handle Ctrl-C. On most
+ // browsers, this is the *only* way to place text on the clipboard from
+ // the 'drive-by' web.
+ if (this.keyboard.terminal.clearSelectionAfterCopy) {
+ setTimeout(selection.collapseToEnd.bind(selection), 50);
+ }
+ return hterm.Keyboard.KeyActions.PASS;
+ }
+
+ if (!this.keyboard.ctrlCCopy && e.shiftKey) {
+ // Ctrl-Shift-C should copy if there is a selection, send ^C otherwise.
+ // Perform the copy manually. This only works in situations where
+ // document.execCommand('copy') is allowed.
+ if (this.keyboard.terminal.clearSelectionAfterCopy) {
+ setTimeout(selection.collapseToEnd.bind(selection), 50);
+ }
+ this.keyboard.terminal.copySelectionToClipboard();
+ return hterm.Keyboard.KeyActions.CANCEL;
+ }
+ }
+
+ return '\x03';
+};
+
+/**
+ * Either send a ^N or open a new window to the same location.
+ */
+hterm.Keyboard.KeyMap.prototype.onCtrlN_ = function(e, keyDef) {
+ if (e.shiftKey) {
+ lib.f.openWindow(document.location.href, '',
+ 'chrome=no,close=yes,resize=yes,scrollbars=yes,' +
+ 'minimizable=yes,width=' + window.innerWidth +
+ ',height=' + window.innerHeight);
+ return hterm.Keyboard.KeyActions.CANCEL;
+ }
+
+ return '\x0e';
+};
+
+/**
+ * Either send a ^V or issue a paste command.
+ *
+ * The default behavior is to paste if the user presses Ctrl-Shift-V, and send
+ * a ^V if the user presses Ctrl-V. This can be flipped with the
+ * 'ctrl-v-paste' preference.
+ *
+ */
+hterm.Keyboard.KeyMap.prototype.onCtrlV_ = function(e, keyDef) {
+ if ((!e.shiftKey && this.keyboard.ctrlVPaste) ||
+ (e.shiftKey && !this.keyboard.ctrlVPaste)) {
+ // We try to do the pasting ourselves as not all browsers/OSs bind Ctrl-V to
+ // pasting. Notably, on macOS, Ctrl-V/Ctrl-Shift-V do nothing.
+ // However, this might run into web restrictions, so if it fails, we still
+ // fallback to the letting the native behavior (hopefully) save us.
+ if (this.keyboard.terminal.paste())
+ return hterm.Keyboard.KeyActions.CANCEL;
+ else
+ return hterm.Keyboard.KeyActions.PASS;
+ }
+
+ return '\x16';
+};
+
+/**
+ * Either the default action or open a new window to the same location.
+ */
+hterm.Keyboard.KeyMap.prototype.onMetaN_ = function(e, keyDef) {
+ if (e.shiftKey) {
+ lib.f.openWindow(document.location.href, '',
+ 'chrome=no,close=yes,resize=yes,scrollbars=yes,' +
+ 'minimizable=yes,width=' + window.outerWidth +
+ ',height=' + window.outerHeight);
+ return hterm.Keyboard.KeyActions.CANCEL;
+ }
+
+ return hterm.Keyboard.KeyActions.DEFAULT;
+};
+
+/**
+ * Either send a Meta-C or allow the browser to interpret the keystroke as a
+ * copy command.
+ *
+ * If there is no selection, or if the user presses Meta-Shift-C, then we'll
+ * transmit an '\x1b' (if metaSendsEscape is on) followed by 'c' or 'C'.
+ *
+ * If there is a selection, we defer to the browser. In this case we clear out
+ * the selection so the user knows we heard them, and also to give them a
+ * chance to send a Meta-C by just hitting the key again.
+ */
+hterm.Keyboard.KeyMap.prototype.onMetaC_ = function(e, keyDef) {
+ var document = this.keyboard.terminal.getDocument();
+ if (e.shiftKey || document.getSelection().isCollapsed) {
+ // If the shift key is being held, or there is no document selection, send
+ // a Meta-C. The keyboard code will add the ESC if metaSendsEscape is true,
+ // we just have to decide between 'c' and 'C'.
+ return keyDef.keyCap.substr(e.shiftKey ? 1 : 0, 1);
+ }
+
+ // Otherwise let the browser handle it as a copy command.
+ if (this.keyboard.terminal.clearSelectionAfterCopy) {
+ setTimeout(function() { document.getSelection().collapseToEnd(); }, 50);
+ }
+ return hterm.Keyboard.KeyActions.PASS;
+};
+
+/**
+ * Either PASS or DEFAULT Meta-V, depending on preference.
+ *
+ * Always PASS Meta-Shift-V to allow browser to interpret the keystroke as
+ * a paste command.
+ */
+hterm.Keyboard.KeyMap.prototype.onMetaV_ = function(e, keyDef) {
+ if (e.shiftKey)
+ return hterm.Keyboard.KeyActions.PASS;
+
+ return this.keyboard.passMetaV ?
+ hterm.Keyboard.KeyActions.PASS :
+ hterm.Keyboard.KeyActions.DEFAULT;
+};
+
+/**
+ * Handle font zooming.
+ *
+ * The browser's built-in zoom has a bit of an issue at certain zoom levels.
+ * At some magnifications, the measured height of a row of text differs from
+ * the height that was explicitly set.
+ *
+ * We override the browser zoom keys to change the ScrollPort's font size to
+ * avoid the issue.
+ */
+hterm.Keyboard.KeyMap.prototype.onPlusMinusZero_ = function(e, keyDef) {
+ if (!(this.keyboard.ctrlPlusMinusZeroZoom ^ e.shiftKey)) {
+ // If ctrl-PMZ controls zoom and the shift key is pressed, or
+ // ctrl-shift-PMZ controls zoom and this shift key is not pressed,
+ // then we want to send the control code instead of affecting zoom.
+ if (keyDef.keyCap == '-_')
+ return '\x1f'; // ^_
+
+ // Only ^_ is valid, the other sequences have no meaning.
+ return hterm.Keyboard.KeyActions.CANCEL;
+ }
+
+ if (this.keyboard.terminal.getZoomFactor() != 1) {
+ // If we're not at 1:1 zoom factor, let the Ctrl +/-/0 keys control the
+ // browser zoom, so it's easier to for the user to get back to 100%.
+ return hterm.Keyboard.KeyActions.PASS;
+ }
+
+ var cap = keyDef.keyCap.substr(0, 1);
+ if (cap == '0') {
+ this.keyboard.terminal.setFontSize(0);
+ } else {
+ var size = this.keyboard.terminal.getFontSize();
+
+ if (cap == '-' || keyDef.keyCap == '[KP-]') {
+ size -= 1;
+ } else {
+ size += 1;
+ }
+
+ this.keyboard.terminal.setFontSize(size);
+ }
+
+ return hterm.Keyboard.KeyActions.CANCEL;
+};
+// SOURCE FILE: hterm/js/hterm_keyboard_keypattern.js
+// Copyright (c) 2015 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * A record of modifier bits and keycode used to define a key binding.
+ *
+ * The modifier names are enumerated in the static KeyPattern.modifiers
+ * property below. Each modifier can be true, false, or "*". True means
+ * the modifier key must be present, false means it must not, and "*" means
+ * it doesn't matter.
+ */
+hterm.Keyboard.KeyPattern = function(spec) {
+ this.wildcardCount = 0;
+ this.keyCode = spec.keyCode;
+
+ hterm.Keyboard.KeyPattern.modifiers.forEach(function(mod) {
+ this[mod] = spec[mod] || false;
+ if (this[mod] == '*')
+ this.wildcardCount++;
+ }.bind(this));
+};
+
+/**
+ * Valid modifier names.
+ */
+hterm.Keyboard.KeyPattern.modifiers = [
+ 'shift', 'ctrl', 'alt', 'meta'
+];
+
+/**
+ * A compare callback for Array.prototype.sort().
+ *
+ * The bindings code wants to be sure to search through the strictest key
+ * patterns first, so that loosely defined patterns have a lower priority than
+ * exact patterns.
+ *
+ * @param {hterm.Keyboard.KeyPattern} a
+ * @param {hterm.Keyboard.KeyPattern} b
+ */
+hterm.Keyboard.KeyPattern.sortCompare = function(a, b) {
+ if (a.wildcardCount < b.wildcardCount)
+ return -1;
+
+ if (a.wildcardCount > b.wildcardCount)
+ return 1;
+
+ return 0;
+};
+
+/**
+ * Private method used to match this key pattern against other key patterns
+ * or key down events.
+ *
+ * @param {Object} The object to match.
+ * @param {boolean} True if we should ignore wildcards. Useful when you want
+ * to perform and exact match against another key pattern.
+ */
+hterm.Keyboard.KeyPattern.prototype.match_ = function(obj, exactMatch) {
+ if (this.keyCode != obj.keyCode)
+ return false;
+
+ var rv = true;
+
+ hterm.Keyboard.KeyPattern.modifiers.forEach(function(mod) {
+ var modValue = (mod in obj) ? obj[mod] : false;
+ if (!rv || (!exactMatch && this[mod] == '*') || this[mod] == modValue)
+ return;
+
+ rv = false;
+ }.bind(this));
+
+ return rv;
+};
+
+/**
+ * Return true if the given keyDown object is a match for this key pattern.
+ *
+ * @param {Object} keyDown An object with a keyCode property and zero or
+ * more boolean properties representing key modifiers. These property names
+ * must match those defined in hterm.Keyboard.KeyPattern.modifiers.
+ */
+hterm.Keyboard.KeyPattern.prototype.matchKeyDown = function(keyDown) {
+ return this.match_(keyDown, false);
+};
+
+/**
+ * Return true if the given hterm.Keyboard.KeyPattern is exactly the same as
+ * this one.
+ *
+ * @param {hterm.Keyboard.KeyPattern}
+ */
+hterm.Keyboard.KeyPattern.prototype.matchKeyPattern = function(keyPattern) {
+ return this.match_(keyPattern, true);
+};
+// SOURCE FILE: hterm/js/hterm_options.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @fileoverview This file implements the hterm.Options class,
+ * which stores current operating conditions for the terminal. This object is
+ * used instead of a series of parameters to allow saving/restoring of cursor
+ * conditions easily, and to provide an easy place for common configuration
+ * options.
+ *
+ * Original code by Cory Maccarrone.
+ */
+
+/**
+ * Constructor for the hterm.Options class, optionally acting as a copy
+ * constructor.
+ *
+ * The defaults are as defined in http://www.vt100.net/docs/vt510-rm/DECSTR
+ * except that we enable autowrap (wraparound) by default since that seems to
+ * be what xterm does.
+ *
+ * @param {hterm.Options=} opt_copy Optional instance to copy.
+ * @constructor
+ */
+hterm.Options = function(opt_copy) {
+ // All attributes in this class are public to allow easy access by the
+ // terminal.
+
+ this.wraparound = opt_copy ? opt_copy.wraparound : true;
+ this.reverseWraparound = opt_copy ? opt_copy.reverseWraparound : false;
+ this.originMode = opt_copy ? opt_copy.originMode : false;
+ this.autoCarriageReturn = opt_copy ? opt_copy.autoCarriageReturn : false;
+ this.cursorVisible = opt_copy ? opt_copy.cursorVisible : false;
+ this.cursorBlink = opt_copy ? opt_copy.cursorBlink : false;
+ this.insertMode = opt_copy ? opt_copy.insertMode : false;
+ this.reverseVideo = opt_copy ? opt_copy.reverseVideo : false;
+ this.bracketedPaste = opt_copy ? opt_copy.bracketedPaste : false;
+};
+// SOURCE FILE: hterm/js/hterm_parser.js
+// Copyright (c) 2015 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+lib.rtdep('hterm.Keyboard.KeyActions');
+
+/**
+ * @constructor
+ * Parses the key definition syntax used for user keyboard customizations.
+ */
+hterm.Parser = function() {
+ /**
+ * @type {string} The source string.
+ */
+ this.source = '';
+
+ /**
+ * @type {number} The current position.
+ */
+ this.pos = 0;
+
+ /**
+ * @type {string?} The character at the current position.
+ */
+ this.ch = null;
+};
+
+hterm.Parser.prototype.error = function(message) {
+ return new Error('Parse error at ' + this.pos + ': ' + message);
+};
+
+hterm.Parser.prototype.isComplete = function() {
+ return this.pos == this.source.length;
+};
+
+hterm.Parser.prototype.reset = function(source, opt_pos) {
+ this.source = source;
+ this.pos = opt_pos || 0;
+ this.ch = source.substr(0, 1);
+};
+
+/**
+ * Parse a key sequence.
+ *
+ * A key sequence is zero or more of the key modifiers defined in
+ * hterm.Parser.identifiers.modifierKeys followed by a key code. Key
+ * codes can be an integer or an identifier from
+ * hterm.Parser.identifiers.keyCodes. Modifiers and keyCodes should be joined
+ * by the dash character.
+ *
+ * An asterisk "*" can be used to indicate that the unspecified modifiers
+ * are optional.
+ *
+ * For example:
+ * A: Matches only an unmodified "A" character.
+ * 65: Same as above.
+ * 0x41: Same as above.
+ * Ctrl-A: Matches only Ctrl-A.
+ * Ctrl-65: Same as above.
+ * Ctrl-0x41: Same as above.
+ * Ctrl-Shift-A: Matches only Ctrl-Shift-A.
+ * Ctrl-*-A: Matches Ctrl-A, as well as any other key sequence that includes
+ * at least the Ctrl and A keys.
+ *
+ * @return {Object} An object with shift, ctrl, alt, meta, keyCode
+ * properties.
+ */
+hterm.Parser.prototype.parseKeySequence = function() {
+ var rv = {
+ keyCode: null
+ };
+
+ for (var k in hterm.Parser.identifiers.modifierKeys) {
+ rv[hterm.Parser.identifiers.modifierKeys[k]] = false;
+ }
+
+ while (this.pos < this.source.length) {
+ this.skipSpace();
+
+ var token = this.parseToken();
+ if (token.type == 'integer') {
+ rv.keyCode = token.value;
+
+ } else if (token.type == 'identifier') {
+ var ucValue = token.value.toUpperCase();
+ if (ucValue in hterm.Parser.identifiers.modifierKeys &&
+ hterm.Parser.identifiers.modifierKeys.hasOwnProperty(ucValue)) {
+ var mod = hterm.Parser.identifiers.modifierKeys[ucValue];
+ if (rv[mod] && rv[mod] != '*')
+ throw this.error('Duplicate modifier: ' + token.value);
+ rv[mod] = true;
+
+ } else if (ucValue in hterm.Parser.identifiers.keyCodes &&
+ hterm.Parser.identifiers.keyCodes.hasOwnProperty(ucValue)) {
+ rv.keyCode = hterm.Parser.identifiers.keyCodes[ucValue];
+
+ } else {
+ throw this.error('Unknown key: ' + token.value);
+ }
+
+ } else if (token.type == 'symbol') {
+ if (token.value == '*') {
+ for (var id in hterm.Parser.identifiers.modifierKeys) {
+ var p = hterm.Parser.identifiers.modifierKeys[id];
+ if (!rv[p])
+ rv[p] = '*';
+ }
+ } else {
+ throw this.error('Unexpected symbol: ' + token.value);
+ }
+ } else {
+ throw this.error('Expected integer or identifier');
+ }
+
+ this.skipSpace();
+
+ if (this.ch != '-')
+ break;
+
+ if (rv.keyCode != null)
+ throw this.error('Extra definition after target key');
+
+ this.advance(1);
+ }
+
+ if (rv.keyCode == null)
+ throw this.error('Missing target key');
+
+ return rv;
+};
+
+hterm.Parser.prototype.parseKeyAction = function() {
+ this.skipSpace();
+
+ var token = this.parseToken();
+
+ if (token.type == 'string')
+ return token.value;
+
+ if (token.type == 'identifier') {
+ if (token.value in hterm.Parser.identifiers.actions &&
+ hterm.Parser.identifiers.actions.hasOwnProperty(token.value))
+ return hterm.Parser.identifiers.actions[token.value];
+
+ throw this.error('Unknown key action: ' + token.value);
+ }
+
+ throw this.error('Expected string or identifier');
+
+};
+
+hterm.Parser.prototype.peekString = function() {
+ return this.ch == '\'' || this.ch == '"';
+};
+
+hterm.Parser.prototype.peekIdentifier = function() {
+ return this.ch.match(/[a-z_]/i);
+};
+
+hterm.Parser.prototype.peekInteger = function() {
+ return this.ch.match(/[0-9]/);
+};
+
+hterm.Parser.prototype.parseToken = function() {
+ if (this.ch == '*') {
+ var rv = {type: 'symbol', value: this.ch};
+ this.advance(1);
+ return rv;
+ }
+
+ if (this.peekIdentifier())
+ return {type: 'identifier', value: this.parseIdentifier()};
+
+ if (this.peekString())
+ return {type: 'string', value: this.parseString()};
+
+ if (this.peekInteger())
+ return {type: 'integer', value: this.parseInteger()};
+
+
+ throw this.error('Unexpected token');
+};
+
+hterm.Parser.prototype.parseIdentifier = function() {
+ if (!this.peekIdentifier())
+ throw this.error('Expected identifier');
+
+ return this.parsePattern(/[a-z0-9_]+/ig);
+};
+
+hterm.Parser.prototype.parseInteger = function() {
+ var base = 10;
+
+ if (this.ch == '0' && this.pos < this.source.length - 1 &&
+ this.source.substr(this.pos + 1, 1) == 'x') {
+ return parseInt(this.parsePattern(/0x[0-9a-f]+/gi));
+ }
+
+ return parseInt(this.parsePattern(/\d+/g));
+};
+
+/**
+ * Parse a single or double quoted string.
+ *
+ * The current position should point at the initial quote character. Single
+ * quoted strings will be treated literally, double quoted will process escapes.
+ *
+ * TODO(rginda): Variable interpolation.
+ *
+ * @param {ParseState} parseState
+ * @param {string} quote A single or double-quote character.
+ * @return {string}
+ */
+hterm.Parser.prototype.parseString = function() {
+ var result = '';
+
+ var quote = this.ch;
+ if (quote != '"' && quote != '\'')
+ throw this.error('String expected');
+
+ this.advance(1);
+
+ var re = new RegExp('[\\\\' + quote + ']', 'g');
+
+ while (this.pos < this.source.length) {
+ re.lastIndex = this.pos;
+ if (!re.exec(this.source))
+ throw this.error('Unterminated string literal');
+
+ result += this.source.substring(this.pos, re.lastIndex - 1);
+
+ this.advance(re.lastIndex - this.pos - 1);
+
+ if (quote == '"' && this.ch == '\\') {
+ this.advance(1);
+ result += this.parseEscape();
+ continue;
+ }
+
+ if (quote == '\'' && this.ch == '\\') {
+ result += this.ch;
+ this.advance(1);
+ continue;
+ }
+
+ if (this.ch == quote) {
+ this.advance(1);
+ return result;
+ }
+ }
+
+ throw this.error('Unterminated string literal');
+};
+
+
+/**
+ * Parse an escape code from the current position (which should point to
+ * the first character AFTER the leading backslash.)
+ *
+ * @return {string}
+ */
+hterm.Parser.prototype.parseEscape = function() {
+ var map = {
+ '"': '"',
+ '\'': '\'',
+ '\\': '\\',
+ 'a': '\x07',
+ 'b': '\x08',
+ 'e': '\x1b',
+ 'f': '\x0c',
+ 'n': '\x0a',
+ 'r': '\x0d',
+ 't': '\x09',
+ 'v': '\x0b',
+ 'x': function() {
+ var value = this.parsePattern(/[a-z0-9]{2}/ig);
+ return String.fromCharCode(parseInt(value, 16));
+ },
+ 'u': function() {
+ var value = this.parsePattern(/[a-z0-9]{4}/ig);
+ return String.fromCharCode(parseInt(value, 16));
+ }
+ };
+
+ if (!(this.ch in map && map.hasOwnProperty(this.ch)))
+ throw this.error('Unknown escape: ' + this.ch);
+
+ var value = map[this.ch];
+ this.advance(1);
+
+ if (typeof value == 'function')
+ value = value.call(this);
+
+ return value;
+};
+
+/**
+ * Parse the given pattern starting from the current position.
+ *
+ * @param {RegExp} pattern A pattern representing the characters to span. MUST
+ * include the "global" RegExp flag.
+ * @return {string}
+ */
+hterm.Parser.prototype.parsePattern = function(pattern) {
+ if (!pattern.global)
+ throw this.error('Internal error: Span patterns must be global');
+
+ pattern.lastIndex = this.pos;
+ var ary = pattern.exec(this.source);
+
+ if (!ary || pattern.lastIndex - ary[0].length != this.pos)
+ throw this.error('Expected match for: ' + pattern);
+
+ this.pos = pattern.lastIndex - 1;
+ this.advance(1);
+
+ return ary[0];
+};
+
+
+/**
+ * Advance the current position.
+ *
+ * @param {number} count
+ */
+hterm.Parser.prototype.advance = function(count) {
+ this.pos += count;
+ this.ch = this.source.substr(this.pos, 1);
+};
+
+/**
+ * @param {string=} opt_expect A list of valid non-whitespace characters to
+ * terminate on.
+ * @return {void}
+ */
+hterm.Parser.prototype.skipSpace = function(opt_expect) {
+ if (!/\s/.test(this.ch))
+ return;
+
+ var re = /\s+/gm;
+ re.lastIndex = this.pos;
+
+ var source = this.source;
+ if (re.exec(source))
+ this.pos = re.lastIndex;
+
+ this.ch = this.source.substr(this.pos, 1);
+
+ if (opt_expect) {
+ if (this.ch.indexOf(opt_expect) == -1) {
+ throw this.error('Expected one of ' + opt_expect + ', found: ' +
+ this.ch);
+ }
+ }
+};
+// SOURCE FILE: hterm/js/hterm_parser_identifiers.js
+// Copyright (c) 2015 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * Collections of identifier for hterm.Parser.
+ */
+hterm.Parser.identifiers = {};
+
+/**
+ * Modifier key names used when defining key sequences.
+ *
+ * These are upper case so we can normalize the user input and be forgiving.
+ * "CTRL-A" and "Ctrl-A" and "ctrl-a" are all accepted.
+ *
+ * Note: Names here cannot overlap with hterm.Parser.identifiers.keyCodes.
+ */
+hterm.Parser.identifiers.modifierKeys = {
+ SHIFT: 'shift',
+ CTRL: 'ctrl',
+ // Common alias.
+ CONTROL: 'ctrl',
+ ALT: 'alt',
+ META: 'meta'
+};
+
+/**
+ * Key codes useful when defining key sequences.
+ *
+ * Punctuation is mostly left out of this list because they can move around
+ * based on keyboard locale and browser.
+ *
+ * In a key sequence like "Ctrl-ESC", the ESC comes from this list of
+ * identifiers. It is equivalent to "Ctrl-27" and "Ctrl-0x1b".
+ *
+ * These are upper case so we can normalize the user input and be forgiving.
+ * "Ctrl-ESC" and "Ctrl-Esc" an "Ctrl-esc" are all accepted.
+ *
+ * We also include common aliases for the same key. "Esc" and "Escape" are the
+ * same key.
+ *
+ * Note: Names here cannot overlap with hterm.Parser.identifiers.modifierKeys.
+ */
+hterm.Parser.identifiers.keyCodes = {
+ // Top row.
+ ESCAPE: 27,
+ ESC: 27,
+ F1: 112,
+ F2: 113,
+ F3: 114,
+ F4: 115,
+ F5: 116,
+ F6: 117,
+ F7: 118,
+ F8: 119,
+ F9: 120,
+ F10: 121,
+ F11: 122,
+ F12: 123,
+
+ // Row two.
+ ONE: 49,
+ TWO: 50,
+ THREE: 51,
+ FOUR: 52,
+ FIVE: 53,
+ SIX: 54,
+ SEVEN: 55,
+ EIGHT: 56,
+ NINE: 57,
+ ZERO: 48,
+ BACKSPACE: 8,
+ BKSP: 8,
+ BS: 8,
+
+ // Row three.
+ TAB: 9,
+ Q: 81,
+ W: 87,
+ E: 69,
+ R: 82,
+ T: 84,
+ Y: 89,
+ U: 85,
+ I: 73,
+ O: 79,
+ P: 80,
+
+ // Row four.
+ CAPS_LOCK: 20,
+ CAPSLOCK: 20,
+ CAPS: 20,
+ A: 65,
+ S: 83,
+ D: 68,
+ F: 70,
+ G: 71,
+ H: 72,
+ J: 74,
+ K: 75,
+ L: 76,
+ // We map enter and return together even though enter should really be 10
+ // because most people don't know or care about the history here. Plus,
+ // most keyboards/programs map them together already. If they really want
+ // to bind them differently, they can also use the numeric value.
+ ENTER: 13,
+ ENT: 13,
+ RETURN: 13,
+ RET: 13,
+
+ // Row five.
+ Z: 90,
+ X: 88,
+ C: 67,
+ V: 86,
+ B: 66,
+ N: 78,
+ M: 77,
+
+ // Etc.
+ SPACE: 32,
+ SP: 32,
+ PRINT_SCREEN: 42,
+ PRTSC: 42,
+ SCROLL_LOCK: 145,
+ SCRLK: 145,
+ BREAK: 19,
+ BRK: 19,
+ INSERT: 45,
+ INS: 45,
+ HOME: 36,
+ PAGE_UP: 33,
+ PGUP: 33,
+ DELETE: 46,
+ DEL: 46,
+ END: 35,
+ PAGE_DOWN: 34,
+ PGDOWN: 34,
+ PGDN: 34,
+ UP: 38,
+ DOWN: 40,
+ RIGHT: 39,
+ LEFT: 37,
+ NUMLOCK: 144,
+
+ // Keypad
+ KP0: 96,
+ KP1: 97,
+ KP2: 98,
+ KP3: 99,
+ KP4: 100,
+ KP5: 101,
+ KP6: 102,
+ KP7: 103,
+ KP8: 104,
+ KP9: 105,
+ KP_PLUS: 107,
+ KP_ADD: 107,
+ KP_MINUS: 109,
+ KP_SUBTRACT: 109,
+ KP_STAR: 106,
+ KP_MULTIPLY: 106,
+ KP_DIVIDE: 111,
+ KP_DECIMAL: 110,
+ KP_PERIOD: 110,
+
+ // Chrome OS media keys
+ NAVIGATE_BACK: 166,
+ NAVIGATE_FORWARD: 167,
+ RELOAD: 168,
+ FULL_SCREEN: 183,
+ WINDOW_OVERVIEW: 182,
+ BRIGHTNESS_UP: 216,
+ BRIGHTNESS_DOWN: 217
+};
+
+/**
+ * Identifiers for use in key actions.
+ */
+hterm.Parser.identifiers.actions = {
+ /**
+ * Prevent the browser and operating system from handling the event.
+ */
+ CANCEL: hterm.Keyboard.KeyActions.CANCEL,
+
+ /**
+ * Wait for a "keypress" event, send the keypress charCode to the host.
+ */
+ DEFAULT: hterm.Keyboard.KeyActions.DEFAULT,
+
+ /**
+ * Let the browser or operating system handle the key.
+ */
+ PASS: hterm.Keyboard.KeyActions.PASS,
+
+ /**
+ * Scroll the terminal one line up.
+ */
+ scrollLineUp: function(terminal) {
+ terminal.scrollLineUp();
+ return hterm.Keyboard.KeyActions.CANCEL;
+ },
+
+ /**
+ * Scroll the terminal one line down.
+ */
+ scrollLineDown: function(terminal) {
+ terminal.scrollLineDown();
+ return hterm.Keyboard.KeyActions.CANCEL;
+ },
+
+ /**
+ * Scroll the terminal one page up.
+ */
+ scrollPageUp: function(terminal) {
+ terminal.scrollPageUp();
+ return hterm.Keyboard.KeyActions.CANCEL;
+ },
+
+ /**
+ * Scroll the terminal one page down.
+ */
+ scrollPageDown: function(terminal) {
+ terminal.scrollPageDown();
+ return hterm.Keyboard.KeyActions.CANCEL;
+ },
+
+ /**
+ * Scroll the terminal to the top.
+ */
+ scrollToTop: function(terminal) {
+ terminal.scrollHome();
+ return hterm.Keyboard.KeyActions.CANCEL;
+ },
+
+ /**
+ * Scroll the terminal to the bottom.
+ */
+ scrollToBottom: function(terminal) {
+ terminal.scrollEnd();
+ return hterm.Keyboard.KeyActions.CANCEL;
+ },
+
+ /**
+ * Clear the active screen and move the cursor to (0,0).
+ */
+ clearScreen: function(terminal) {
+ terminal.clearHome();
+ return hterm.Keyboard.KeyActions.CANCEL;
+ },
+
+ /**
+ * Clear the scrollback buffer.
+ */
+ clearScrollback: function(terminal) {
+ terminal.clearScrollback();
+ return hterm.Keyboard.KeyActions.CANCEL;
+ },
+
+ /**
+ * Clear the terminal and scrollback buffer and move the cursor to (0,0).
+ */
+ clearTerminal: function(terminal) {
+ terminal.wipeContents();
+ return hterm.Keyboard.KeyActions.CANCEL;
+ },
+
+ /**
+ * Perform a full terminal reset.
+ */
+ fullReset: function(terminal) {
+ terminal.reset();
+ return hterm.Keyboard.KeyActions.CANCEL;
+ },
+
+ /**
+ * Perform a soft terminal reset.
+ */
+ softReset: function(terminal) {
+ terminal.softReset();
+ return hterm.Keyboard.KeyActions.CANCEL;
+ },
+};
+// SOURCE FILE: hterm/js/hterm_preference_manager.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+lib.rtdep('lib.f', 'lib.Storage');
+
+/**
+ * PreferenceManager subclass managing global NaSSH preferences.
+ *
+ * This is currently just an ordered list of known connection profiles.
+ */
+hterm.PreferenceManager = function(profileId) {
+ lib.PreferenceManager.call(this, hterm.defaultStorage,
+ hterm.PreferenceManager.prefix_ + profileId);
+ Object.entries(hterm.PreferenceManager.defaultPreferences).forEach(
+ ([key, entry]) => {
+ this.definePreference(key, entry['default']);
+ });
+};
+
+/**
+ * The storage key prefix to namespace the preferences.
+ */
+hterm.PreferenceManager.prefix_ = '/hterm/profiles/';
+
+/**
+ * List all the defined profiles.
+ *
+ * @param {function(Array<string>)} callback Called with the list of profiles.
+ */
+hterm.PreferenceManager.listProfiles = function(callback) {
+ hterm.defaultStorage.getItems(null, (items) => {
+ const profiles = {};
+ for (let key of Object.keys(items)) {
+ if (key.startsWith(hterm.PreferenceManager.prefix_)) {
+ // Turn "/hterm/profiles/foo/bar/cow" to "foo/bar/cow".
+ const subKey = key.slice(hterm.PreferenceManager.prefix_.length);
+ // Turn "foo/bar/cow" into "foo".
+ profiles[subKey.split('/', 1)[0]] = true;
+ }
+ }
+ callback(Object.keys(profiles));
+ });
+};
+
+hterm.PreferenceManager.categories = {};
+hterm.PreferenceManager.categories.Keyboard = 'Keyboard';
+hterm.PreferenceManager.categories.Appearance = 'Appearance';
+hterm.PreferenceManager.categories.CopyPaste = 'CopyPaste';
+hterm.PreferenceManager.categories.Sounds = 'Sounds';
+hterm.PreferenceManager.categories.Scrolling = 'Scrolling';
+hterm.PreferenceManager.categories.Encoding = 'Encoding';
+hterm.PreferenceManager.categories.Extensions = 'Extensions';
+hterm.PreferenceManager.categories.Miscellaneous = 'Miscellaneous';
+
+/**
+ * List of categories, ordered by display order (top to bottom)
+ */
+hterm.PreferenceManager.categoryDefinitions = [
+ { id: hterm.PreferenceManager.categories.Appearance,
+ text: 'Appearance (fonts, colors, images)'},
+ { id: hterm.PreferenceManager.categories.CopyPaste,
+ text: 'Copy & Paste'},
+ { id: hterm.PreferenceManager.categories.Encoding,
+ text: 'Encoding'},
+ { id: hterm.PreferenceManager.categories.Keyboard,
+ text: 'Keyboard'},
+ { id: hterm.PreferenceManager.categories.Scrolling,
+ text: 'Scrolling'},
+ { id: hterm.PreferenceManager.categories.Sounds,
+ text: 'Sounds'},
+ { id: hterm.PreferenceManager.categories.Extensions,
+ text: 'Extensions'},
+ { id: hterm.PreferenceManager.categories.Miscellaneous,
+ text: 'Miscellaneous'}
+];
+
+/**
+ * Internal helper to create a default preference object.
+ *
+ * @param {hterm.PreferenceManager.categories} category The pref category.
+ * @param {string} name The user readable name/title.
+ * @param {Object} defaultValue The default pref value.
+ * @param {Object} type The type for this pref (or an array for enums).
+ * @param {string} help The user readable help text.
+ * @return {Object} The default pref object.
+ */
+hterm.PreferenceManager.definePref_ = function(
+ name, category, defaultValue, type, help) {
+ return {
+ 'name': name,
+ 'category': category,
+ 'default': defaultValue,
+ 'type': type,
+ 'help': help,
+ };
+};
+
+hterm.PreferenceManager.defaultPreferences = {
+ 'alt-gr-mode': hterm.PreferenceManager.definePref_(
+ 'AltGr key mode',
+ hterm.PreferenceManager.categories.Keyboard,
+ null, [null, 'none', 'ctrl-alt', 'left-alt', 'right-alt'],
+ `Select an AltGr detection heuristic.\n` +
+ `\n` +
+ `'null': Autodetect based on navigator.language:\n` +
+ ` 'en-us' => 'none', else => 'right-alt'\n` +
+ `'none': Disable any AltGr related munging.\n` +
+ `'ctrl-alt': Assume Ctrl+Alt means AltGr.\n` +
+ `'left-alt': Assume left Alt means AltGr.\n` +
+ `'right-alt': Assume right Alt means AltGr.`
+ ),
+
+ 'alt-backspace-is-meta-backspace': hterm.PreferenceManager.definePref_(
+ 'Alt-Backspace is Meta-Backspace',
+ hterm.PreferenceManager.categories.Keyboard,
+ false, 'bool',
+ `If set, undoes the Chrome OS Alt-Backspace->DEL remap, so that ` +
+ `Alt-Backspace indeed is Alt-Backspace.`
+ ),
+
+ 'alt-is-meta': hterm.PreferenceManager.definePref_(
+ 'Treat Alt key as Meta key',
+ hterm.PreferenceManager.categories.Keyboard,
+ false, 'bool',
+ `Whether the Alt key acts as a Meta key or as a distinct Alt key.`
+ ),
+
+ 'alt-sends-what': hterm.PreferenceManager.definePref_(
+ 'Alt key modifier handling',
+ hterm.PreferenceManager.categories.Keyboard,
+ 'escape', ['escape', '8-bit', 'browser-key'],
+ `Controls how the Alt key is handled.\n` +
+ `\n` +
+ ` escape: Send an ESC prefix.\n` +
+ ` 8-bit: Add 128 to the typed character as in xterm.\n` +
+ ` browser-key: Wait for the keypress event and see what the browser\n` +
+ ` says. (This won't work well on platforms where the browser\n` +
+ ` performs a default action for some Alt sequences.)`
+ ),
+
+ 'audible-bell-sound': hterm.PreferenceManager.definePref_(
+ 'Alert bell sound (URI)',
+ hterm.PreferenceManager.categories.Sounds,
+ 'lib-resource:hterm/audio/bell', 'url',
+ `URL of the terminal bell sound. Empty string for no audible bell.`
+ ),
+
+ 'desktop-notification-bell': hterm.PreferenceManager.definePref_(
+ 'Create desktop notifications for alert bells',
+ hterm.PreferenceManager.categories.Sounds,
+ false, 'bool',
+ `If true, terminal bells in the background will create a Web ` +
+ `Notification. https://www.w3.org/TR/notifications/\n` +
+ `\n` +
+ `Displaying notifications requires permission from the user. When this ` +
+ `option is set to true, hterm will attempt to ask the user for ` +
+ `permission if necessary. Browsers may not show this permission ` +
+ `request if it was not triggered by a user action.\n` +
+ `\n` +
+ `Chrome extensions with the "notifications" permission have permission ` +
+ `to display notifications.`
+ ),
+
+ 'background-color': hterm.PreferenceManager.definePref_(
+ 'Background color',
+ hterm.PreferenceManager.categories.Appearance,
+ 'rgb(16, 16, 16)', 'color',
+ `The background color for text with no other color attributes.`
+ ),
+
+ 'background-image': hterm.PreferenceManager.definePref_(
+ 'Background image',
+ hterm.PreferenceManager.categories.Appearance,
+ '', 'string',
+ `CSS value of the background image. Empty string for no image.\n` +
+ `\n` +
+ `For example:\n` +
+ ` url(https://goo.gl/anedTK)\n` +
+ ` linear-gradient(top bottom, blue, red)`
+ ),
+
+ 'background-size': hterm.PreferenceManager.definePref_(
+ 'Background image size',
+ hterm.PreferenceManager.categories.Appearance,
+ '', 'string',
+ `CSS value of the background image size.`
+ ),
+
+ 'background-position': hterm.PreferenceManager.definePref_(
+ 'Background image position',
+ hterm.PreferenceManager.categories.Appearance,
+ '', 'string',
+ `CSS value of the background image position.\n` +
+ `\n` +
+ `For example:\n` +
+ ` 10% 10%\n` +
+ ` center`
+ ),
+
+ 'backspace-sends-backspace': hterm.PreferenceManager.definePref_(
+ 'Backspace key behavior',
+ hterm.PreferenceManager.categories.Keyboard,
+ false, 'bool',
+ `If true, the backspace should send BS ('\\x08', aka ^H). Otherwise ` +
+ `the backspace key should send '\\x7f'.`
+ ),
+
+ 'character-map-overrides': hterm.PreferenceManager.definePref_(
+ 'Character map overrides',
+ hterm.PreferenceManager.categories.Appearance,
+ null, 'value',
+ `This is specified as an object. It is a sparse array, where each ` +
+ `property is the character set code and the value is an object that is ` +
+ `a sparse array itself. In that sparse array, each property is the ` +
+ `received character and the value is the displayed character.\n` +
+ `\n` +
+ `For example:\n` +
+ ` {"0":{"+":"\\u2192",",":"\\u2190","-":"\\u2191",".":"\\u2193", ` +
+ `"0":"\\u2588"}}`
+ ),
+
+ 'close-on-exit': hterm.PreferenceManager.definePref_(
+ 'Close window on exit',
+ hterm.PreferenceManager.categories.Miscellaneous,
+ true, 'bool',
+ `Whether to close the window when the command finishes executing.`
+ ),
+
+ 'cursor-blink': hterm.PreferenceManager.definePref_(
+ 'Cursor blink',
+ hterm.PreferenceManager.categories.Appearance,
+ false, 'bool',
+ `Whether the text cursor blinks by default. This can be toggled at ` +
+ `runtime via terminal escape sequences.`
+ ),
+
+ 'cursor-blink-cycle': hterm.PreferenceManager.definePref_(
+ 'Cursor blink rate',
+ hterm.PreferenceManager.categories.Appearance,
+ [1000, 500], 'value',
+ `The text cursor blink rate in milliseconds.\n` +
+ `\n` +
+ `A two element array, the first of which is how long the text cursor ` +
+ `should be on, second is how long it should be off.`
+ ),
+
+ 'cursor-color': hterm.PreferenceManager.definePref_(
+ 'Text cursor color',
+ hterm.PreferenceManager.categories.Appearance,
+ 'rgba(255, 0, 0, 0.5)', 'color',
+ `The color of the visible text cursor.`
+ ),
+
+ 'color-palette-overrides': hterm.PreferenceManager.definePref_(
+ 'Initial color palette',
+ hterm.PreferenceManager.categories.Appearance,
+ null, 'value',
+ `Override colors in the default palette.\n` +
+ `\n` +
+ `This can be specified as an array or an object. If specified as an ` +
+ `object it is assumed to be a sparse array, where each property ` +
+ `is a numeric index into the color palette.\n` +
+ `\n` +
+ `Values can be specified as almost any CSS color value. This ` +
+ `includes #RGB, #RRGGBB, rgb(...), rgba(...), and any color names ` +
+ `that are also part of the standard X11 rgb.txt file.\n` +
+ `\n` +
+ `You can use 'null' to specify that the default value should be not ` +
+ `be changed. This is useful for skipping a small number of indices ` +
+ `when the value is specified as an array.\n` +
+ `\n` +
+ `For example, these both set color index 1 to blue:\n` +
+ ` {1: "#0000ff"}\n` +
+ ` [null, "#0000ff"]`
+ ),
+
+ 'copy-on-select': hterm.PreferenceManager.definePref_(
+ 'Automatically copy selected content',
+ hterm.PreferenceManager.categories.CopyPaste,
+ true, 'bool',
+ `Automatically copy mouse selection to the clipboard.`
+ ),
+
+ 'use-default-window-copy': hterm.PreferenceManager.definePref_(
+ 'Let the browser handle text copying',
+ hterm.PreferenceManager.categories.CopyPaste,
+ false, 'bool',
+ `Whether to use the default browser/OS's copy behavior.\n` +
+ `\n` +
+ `Allow the browser/OS to handle the copy event directly which might ` +
+ `improve compatibility with some systems (where copying doesn't work ` +
+ `at all), but makes the text selection less robust.\n` +
+ `\n` +
+ `For example, long lines that were automatically line wrapped will ` +
+ `be copied with the newlines still in them.`
+ ),
+
+ 'clear-selection-after-copy': hterm.PreferenceManager.definePref_(
+ 'Automatically clear text selection',
+ hterm.PreferenceManager.categories.CopyPaste,
+ true, 'bool',
+ `Whether to clear the selection after copying.`
+ ),
+
+ 'ctrl-plus-minus-zero-zoom': hterm.PreferenceManager.definePref_(
+ 'Ctrl-+/-/0 zoom behavior',
+ hterm.PreferenceManager.categories.Keyboard,
+ true, 'bool',
+ `If true, Ctrl-Plus/Minus/Zero controls zoom.\n` +
+ `If false, Ctrl-Shift-Plus/Minus/Zero controls zoom, Ctrl-Minus sends ` +
+ `^_, Ctrl-Plus/Zero do nothing.`
+ ),
+
+ 'ctrl-c-copy': hterm.PreferenceManager.definePref_(
+ 'Ctrl-C copy behavior',
+ hterm.PreferenceManager.categories.Keyboard,
+ false, 'bool',
+ `Ctrl-C copies if true, send ^C to host if false.\n` +
+ `Ctrl-Shift-C sends ^C to host if true, copies if false.`
+ ),
+
+ 'ctrl-v-paste': hterm.PreferenceManager.definePref_(
+ 'Ctrl-V paste behavior',
+ hterm.PreferenceManager.categories.Keyboard,
+ false, 'bool',
+ `Ctrl-V pastes if true, send ^V to host if false.\n` +
+ `Ctrl-Shift-V sends ^V to host if true, pastes if false.`
+ ),
+
+ 'east-asian-ambiguous-as-two-column': hterm.PreferenceManager.definePref_(
+ 'East Asian Ambiguous use two columns',
+ hterm.PreferenceManager.categories.Keyboard,
+ false, 'bool',
+ `Whether East Asian Ambiguous characters have two column width.`
+ ),
+
+ 'enable-8-bit-control': hterm.PreferenceManager.definePref_(
+ 'Support non-UTF-8 C1 control characters',
+ hterm.PreferenceManager.categories.Keyboard,
+ false, 'bool',
+ `True to enable 8-bit control characters, false to ignore them.\n` +
+ `\n` +
+ `We'll respect the two-byte versions of these control characters ` +
+ `regardless of this setting.`
+ ),
+
+ 'enable-bold': hterm.PreferenceManager.definePref_(
+ 'Bold text behavior',
+ hterm.PreferenceManager.categories.Appearance,
+ null, 'tristate',
+ `If true, use bold weight font for text with the bold/bright ` +
+ `attribute. False to use the normal weight font. Null to autodetect.`
+ ),
+
+ 'enable-bold-as-bright': hterm.PreferenceManager.definePref_(
+ 'Use bright colors with bold text',
+ hterm.PreferenceManager.categories.Appearance,
+ true, 'bool',
+ `If true, use bright colors (8-15 on a 16 color palette) for any text ` +
+ `with the bold attribute. False otherwise.`
+ ),
+
+ 'enable-blink': hterm.PreferenceManager.definePref_(
+ 'Enable blinking text',
+ hterm.PreferenceManager.categories.Appearance,
+ true, 'bool',
+ `If true, respect the blink attribute. False to ignore it.`
+ ),
+
+ 'enable-clipboard-notice': hterm.PreferenceManager.definePref_(
+ 'Show notification when copying content',
+ hterm.PreferenceManager.categories.CopyPaste,
+ true, 'bool',
+ `Whether to show a message in the terminal when the host writes to the ` +
+ `clipboard.`
+ ),
+
+ 'enable-clipboard-write': hterm.PreferenceManager.definePref_(
+ 'Allow remote clipboard writes',
+ hterm.PreferenceManager.categories.CopyPaste,
+ true, 'bool',
+ `Allow the remote host to write directly to the local system ` +
+ `clipboard.\n` +
+ `Read access is never granted regardless of this setting.\n` +
+ `\n` +
+ `This is used to control access to features like OSC-52.`
+ ),
+
+ 'enable-dec12': hterm.PreferenceManager.definePref_(
+ 'Allow changing of text cursor blinking',
+ hterm.PreferenceManager.categories.Miscellaneous,
+ false, 'bool',
+ `Respect the host's attempt to change the text cursor blink status ` +
+ `using DEC Private Mode 12.`
+ ),
+
+ 'enable-csi-j-3': hterm.PreferenceManager.definePref_(
+ 'Allow clearing of scrollback buffer (CSI-J-3)',
+ hterm.PreferenceManager.categories.Miscellaneous,
+ true, 'bool',
+ `Whether CSI-J (Erase Display) mode 3 may clear the terminal ` +
+ `scrollback buffer.\n` +
+ `\n` +
+ `Enabling this by default is safe.`
+ ),
+
+ 'environment': hterm.PreferenceManager.definePref_(
+ 'Environment variables',
+ hterm.PreferenceManager.categories.Miscellaneous,
+ {
+ // Signal ncurses based apps to use UTF-8 output instead of legacy
+ // drawing modes (which only work in ISO-2022 mode). Since hterm is
+ // always UTF-8, this shouldn't cause problems.
+ 'NCURSES_NO_UTF8_ACS': '1',
+ 'TERM': 'xterm-256color',
+ // Set this env var that a bunch of mainstream terminal emulators set
+ // to indicate we support true colors.
+ // https://gist.github.com/XVilka/8346728
+ 'COLORTERM': 'truecolor',
+ },
+ 'value',
+ `The initial set of environment variables, as an object.`
+ ),
+
+ 'font-family': hterm.PreferenceManager.definePref_(
+ 'Text font family',
+ hterm.PreferenceManager.categories.Appearance,
+ '"DejaVu Sans Mono", "Noto Sans Mono", "Everson Mono", FreeMono, ' +
+ 'Menlo, Terminal, monospace',
+ 'string',
+ `Default font family for the terminal text.`
+ ),
+
+ 'font-size': hterm.PreferenceManager.definePref_(
+ 'Text font size',
+ hterm.PreferenceManager.categories.Appearance,
+ 15, 'int',
+ `The default font size in pixels.`
+ ),
+
+ 'font-smoothing': hterm.PreferenceManager.definePref_(
+ 'Text font smoothing',
+ hterm.PreferenceManager.categories.Appearance,
+ 'antialiased', 'string',
+ `CSS font-smoothing property.`
+ ),
+
+ 'foreground-color': hterm.PreferenceManager.definePref_(
+ 'Text color',
+ hterm.PreferenceManager.categories.Appearance,
+ 'rgb(240, 240, 240)', 'color',
+ `The foreground color for text with no other color attributes.`
+ ),
+
+ 'hide-mouse-while-typing': hterm.PreferenceManager.definePref_(
+ 'Hide mouse cursor while typing',
+ hterm.PreferenceManager.categories.Keyboard,
+ null, 'tristate',
+ `Whether to automatically hide the mouse cursor when typing. ` +
+ `By default, autodetect whether the platform/OS handles this.\n` +
+ `\n` +
+ `Note: Some operating systems may override this setting and thus you ` +
+ `might not be able to always disable it.`
+ ),
+
+ 'home-keys-scroll': hterm.PreferenceManager.definePref_(
+ 'Home/End key scroll behavior',
+ hterm.PreferenceManager.categories.Keyboard,
+ false, 'bool',
+ `If true, Home/End controls the terminal scrollbar and Shift-Home/` +
+ `Shift-End are sent to the remote host. If false, then Home/End are ` +
+ `sent to the remote host and Shift-Home/Shift-End scrolls.`
+ ),
+
+ 'keybindings': hterm.PreferenceManager.definePref_(
+ 'Keyboard bindings/shortcuts',
+ hterm.PreferenceManager.categories.Keyboard,
+ null, 'value',
+ `A map of key sequence to key actions. Key sequences include zero or ` +
+ `more modifier keys followed by a key code. Key codes can be decimal ` +
+ `or hexadecimal numbers, or a key identifier. Key actions can be ` +
+ `specified as a string to send to the host, or an action identifier. ` +
+ `For a full explanation of the format, see https://goo.gl/LWRndr.\n` +
+ `\n` +
+ `Sample keybindings:\n` +
+ `{\n` +
+ ` "Ctrl-Alt-K": "clearTerminal",\n` +
+ ` "Ctrl-Shift-L": "PASS",\n` +
+ ` "Ctrl-H": "'Hello World'"\n` +
+ `}`
+ ),
+
+ 'media-keys-are-fkeys': hterm.PreferenceManager.definePref_(
+ 'Media keys are Fkeys',
+ hterm.PreferenceManager.categories.Keyboard,
+ false, 'bool',
+ `If true, convert media keys to their Fkey equivalent. If false, let ` +
+ `the browser handle the keys.`
+ ),
+
+ 'meta-sends-escape': hterm.PreferenceManager.definePref_(
+ 'Meta key modifier handling',
+ hterm.PreferenceManager.categories.Keyboard,
+ true, 'bool',
+ `Send an ESC prefix when pressing a key while holding the Meta key.\n` +
+ `\n` +
+ `For example, when enabled, pressing Meta-K will send ^[k as if you ` +
+ `typed Escape then k. When disabled, only k will be sent.`
+ ),
+
+ 'mouse-right-click-paste': hterm.PreferenceManager.definePref_(
+ 'Mouse right clicks paste content',
+ hterm.PreferenceManager.categories.CopyPaste,
+ true, 'bool',
+ `Paste on right mouse button clicks.\n` +
+ `\n` +
+ `This option is independent of the "mouse-paste-button" setting.\n` +
+ `\n` +
+ `Note: This will handle left & right handed mice correctly.`
+ ),
+
+ 'mouse-paste-button': hterm.PreferenceManager.definePref_(
+ 'Mouse button paste',
+ hterm.PreferenceManager.categories.CopyPaste,
+ null, [null, 0, 1, 2, 3, 4, 5, 6],
+ `Mouse paste button, or null to autodetect.\n` +
+ `\n` +
+ `For autodetect, we'll use the middle mouse button for non-X11 ` +
+ `platforms (including Chrome OS). On X11, we'll use the right mouse ` +
+ `button (since the native window manager should paste via the middle ` +
+ `mouse button).\n` +
+ `\n` +
+ `0 == left (primary) button.\n` +
+ `1 == middle (auxiliary) button.\n` +
+ `2 == right (secondary) button.\n` +
+ `\n` +
+ `This option is independent of the setting for right-click paste.\n` +
+ `\n` +
+ `Note: This will handle left & right handed mice correctly.`
+ ),
+
+ 'word-break-match-left': hterm.PreferenceManager.definePref_(
+ 'Automatic selection halting (to the left)',
+ hterm.PreferenceManager.categories.CopyPaste,
+ '[^\\s\\[\\](){}<>"\'\\^!@#$%&*,;:`]', 'string',
+ `Regular expression to halt matching to the left (start) of a ` +
+ `selection.\n` +
+ `\n` +
+ `Normally this is a character class to reject specific characters.\n` +
+ `We allow "~" and "." by default as paths frequently start with those.`
+ ),
+
+ 'word-break-match-right': hterm.PreferenceManager.definePref_(
+ 'Automatic selection halting (to the right)',
+ hterm.PreferenceManager.categories.CopyPaste,
+ '[^\\s\\[\\](){}<>"\'\\^!@#$%&*,;:~.`]', 'string',
+ `Regular expression to halt matching to the right (end) of a ` +
+ `selection.\n` +
+ `\n` +
+ `Normally this is a character class to reject specific characters.`
+ ),
+
+ 'word-break-match-middle': hterm.PreferenceManager.definePref_(
+ 'Word break characters',
+ hterm.PreferenceManager.categories.CopyPaste,
+ '[^\\s\\[\\](){}<>"\'\\^]*', 'string',
+ `Regular expression to match all the characters in the middle.\n` +
+ `\n` +
+ `Normally this is a character class to reject specific characters.\n` +
+ `\n` +
+ `Used to expand the selection surrounding the starting point.`
+ ),
+
+ 'page-keys-scroll': hterm.PreferenceManager.definePref_(
+ 'Page Up/Down key scroll behavior',
+ hterm.PreferenceManager.categories.Keyboard,
+ false, 'bool',
+ `If true, Page Up/Page Down controls the terminal scrollbar and ` +
+ `Shift-Page Up/Shift-Page Down are sent to the remote host. If false, ` +
+ `then Page Up/Page Down are sent to the remote host and Shift-Page Up/` +
+ `Shift-Page Down scrolls.`
+ ),
+
+ 'pass-alt-number': hterm.PreferenceManager.definePref_(
+ 'Pass Alt-1..9 key behavior',
+ hterm.PreferenceManager.categories.Keyboard,
+ null, 'tristate',
+ `Whether Alt-1..9 is passed to the browser.\n` +
+ `\n` +
+ `This is handy when running hterm in a browser tab, so that you don't ` +
+ `lose Chrome's "switch to tab" keyboard accelerators. When not running ` +
+ `in a tab it's better to send these keys to the host so they can be ` +
+ `used in vim or emacs.\n` +
+ `\n` +
+ `If true, Alt-1..9 will be handled by the browser. If false, Alt-1..9 ` +
+ `will be sent to the host. If null, autodetect based on browser ` +
+ `platform and window type.`
+ ),
+
+ 'pass-ctrl-number': hterm.PreferenceManager.definePref_(
+ 'Pass Ctrl-1..9 key behavior',
+ hterm.PreferenceManager.categories.Keyboard,
+ null, 'tristate',
+ `Whether Ctrl-1..9 is passed to the browser.\n` +
+ `\n` +
+ `This is handy when running hterm in a browser tab, so that you don't ` +
+ `lose Chrome's "switch to tab" keyboard accelerators. When not running ` +
+ `in a tab it's better to send these keys to the host so they can be ` +
+ `used in vim or emacs.\n` +
+ `\n` +
+ `If true, Ctrl-1..9 will be handled by the browser. If false, ` +
+ `Ctrl-1..9 will be sent to the host. If null, autodetect based on ` +
+ `browser platform and window type.`
+ ),
+
+ 'pass-meta-number': hterm.PreferenceManager.definePref_(
+ 'Pass Meta-1..9 key behavior',
+ hterm.PreferenceManager.categories.Keyboard,
+ null, 'tristate',
+ `Whether Meta-1..9 is passed to the browser.\n` +
+ `\n` +
+ `This is handy when running hterm in a browser tab, so that you don't ` +
+ `lose Chrome's "switch to tab" keyboard accelerators. When not running ` +
+ `in a tab it's better to send these keys to the host so they can be ` +
+ `used in vim or emacs.\n` +
+ `\n` +
+ `If true, Meta-1..9 will be handled by the browser. If false, ` +
+ `Meta-1..9 will be sent to the host. If null, autodetect based on ` +
+ `browser platform and window type.`
+ ),
+
+ 'pass-meta-v': hterm.PreferenceManager.definePref_(
+ 'Pass Meta-V key behavior',
+ hterm.PreferenceManager.categories.Keyboard,
+ true, 'bool',
+ `Whether Meta-V gets passed to host.`
+ ),
+
+ 'paste-on-drop': hterm.PreferenceManager.definePref_(
+ 'Allow drag & drop to paste',
+ hterm.PreferenceManager.categories.CopyPaste,
+ true, 'bool',
+ `If true, Drag and dropped text will paste into terminal.\n` +
+ `If false, dropped text will be ignored.`
+ ),
+
+ 'receive-encoding': hterm.PreferenceManager.definePref_(
+ 'Receive encoding',
+ hterm.PreferenceManager.categories.Encoding,
+ 'utf-8', ['utf-8', 'raw'],
+ `Set the expected encoding for data received from the host.\n` +
+ `If the encodings do not match, visual bugs are likely to be ` +
+ `observed.\n` +
+ `\n` +
+ `Valid values are 'utf-8' and 'raw'.`
+ ),
+
+ 'scroll-on-keystroke': hterm.PreferenceManager.definePref_(
+ 'Scroll to bottom after keystroke',
+ hterm.PreferenceManager.categories.Scrolling,
+ true, 'bool',
+ `Whether to scroll to the bottom on any keystroke.`
+ ),
+
+ 'scroll-on-output': hterm.PreferenceManager.definePref_(
+ 'Scroll to bottom after new output',
+ hterm.PreferenceManager.categories.Scrolling,
+ false, 'bool',
+ `Whether to scroll to the bottom on terminal output.`
+ ),
+
+ 'scrollbar-visible': hterm.PreferenceManager.definePref_(
+ 'Scrollbar visibility',
+ hterm.PreferenceManager.categories.Scrolling,
+ true, 'bool',
+ `The vertical scrollbar mode.`
+ ),
+
+ 'scroll-wheel-may-send-arrow-keys': hterm.PreferenceManager.definePref_(
+ 'Emulate arrow keys with scroll wheel',
+ hterm.PreferenceManager.categories.Scrolling,
+ false, 'bool',
+ `When using the alternative screen buffer, and DECCKM (Application ` +
+ `Cursor Keys) is active, mouse wheel scroll events will emulate arrow ` +
+ `keys.\n` +
+ `\n` +
+ `It can be temporarily disabled by holding the Shift key.\n` +
+ `\n` +
+ `This frequently comes up when using pagers (less) or reading man ` +
+ `pages or text editors (vi/nano) or using screen/tmux.`
+ ),
+
+ 'scroll-wheel-move-multiplier': hterm.PreferenceManager.definePref_(
+ 'Mouse scroll wheel multiplier',
+ hterm.PreferenceManager.categories.Scrolling,
+ 1, 'int',
+ `The multiplier for scroll wheel events when measured in pixels.\n` +
+ `\n` +
+ `Alters how fast the page scrolls.`
+ ),
+
+ 'terminal-encoding': hterm.PreferenceManager.definePref_(
+ 'Terminal encoding',
+ hterm.PreferenceManager.categories.Encoding,
+ 'utf-8', ['iso-2022', 'utf-8', 'utf-8-locked'],
+ `The default terminal encoding (DOCS).\n` +
+ `\n` +
+ `ISO-2022 enables character map translations (like graphics maps).\n` +
+ `UTF-8 disables support for those.\n` +
+ `\n` +
+ `The locked variant means the encoding cannot be changed at runtime ` +
+ `via terminal escape sequences.\n` +
+ `\n` +
+ `You should stick with UTF-8 unless you notice broken rendering with ` +
+ `legacy applications.`
+ ),
+
+ 'shift-insert-paste': hterm.PreferenceManager.definePref_(
+ 'Shift-Insert paste',
+ hterm.PreferenceManager.categories.Keyboard,
+ true, 'bool',
+ `Whether Shift-Insert is used for pasting or is sent to the remote host.`
+ ),
+
+ 'user-css': hterm.PreferenceManager.definePref_(
+ 'Custom CSS (URI)',
+ hterm.PreferenceManager.categories.Appearance,
+ '', 'url',
+ `URL of user stylesheet to include in the terminal document.`
+ ),
+
+ 'user-css-text': hterm.PreferenceManager.definePref_(
+ 'Custom CSS (inline text)',
+ hterm.PreferenceManager.categories.Appearance,
+ '', 'multiline-string',
+ `Custom CSS text for styling the terminal.`
+ ),
+
+ 'allow-images-inline': hterm.PreferenceManager.definePref_(
+ 'Allow inline image display',
+ hterm.PreferenceManager.categories.Extensions,
+ null, 'tristate',
+ `Whether to allow the remote host to display images in the terminal.\n` +
+ `\n` +
+ `By default, we prompt until a choice is made.`
+ ),
+};
+
+hterm.PreferenceManager.prototype =
+ Object.create(lib.PreferenceManager.prototype);
+hterm.PreferenceManager.constructor = hterm.PreferenceManager;
+// SOURCE FILE: hterm/js/hterm_pubsub.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * Utility class used to add publish/subscribe/unsubscribe functionality to
+ * an existing object.
+ */
+hterm.PubSub = function() {
+ this.observers_ = {};
+};
+
+/**
+ * Add publish, subscribe, and unsubscribe methods to an existing object.
+ *
+ * No other properties of the object are touched, so there is no need to
+ * worry about clashing private properties.
+ *
+ * @param {Object} obj The object to add this behavior to.
+ */
+hterm.PubSub.addBehavior = function(obj) {
+ var pubsub = new hterm.PubSub();
+ for (var m in hterm.PubSub.prototype) {
+ obj[m] = hterm.PubSub.prototype[m].bind(pubsub);
+ }
+};
+
+/**
+ * Subscribe to be notified of messages about a subject.
+ *
+ * @param {string} subject The subject to subscribe to.
+ * @param {function(Object)} callback The function to invoke for notifications.
+ */
+hterm.PubSub.prototype.subscribe = function(subject, callback) {
+ if (!(subject in this.observers_))
+ this.observers_[subject] = [];
+
+ this.observers_[subject].push(callback);
+};
+
+/**
+ * Unsubscribe from a subject.
+ *
+ * @param {string} subject The subject to unsubscribe from.
+ * @param {function(Object)} callback A callback previously registered via
+ * subscribe().
+ */
+hterm.PubSub.prototype.unsubscribe = function(subject, callback) {
+ var list = this.observers_[subject];
+ if (!list)
+ throw 'Invalid subject: ' + subject;
+
+ var i = list.indexOf(callback);
+ if (i < 0)
+ throw 'Not subscribed: ' + subject;
+
+ list.splice(i, 1);
+};
+
+/**
+ * Publish a message about a subject.
+ *
+ * Subscribers (and the optional final callback) are invoked asynchronously.
+ * This method will return before anyone is actually notified.
+ *
+ * @param {string} subject The subject to publish about.
+ * @param {Object} e An arbitrary object associated with this notification.
+ * @param {function(Object)} opt_lastCallback An optional function to call after
+ * all subscribers have been notified.
+ */
+hterm.PubSub.prototype.publish = function(subject, e, opt_lastCallback) {
+ function notifyList(i) {
+ // Set this timeout before invoking the callback, so we don't have to
+ // concern ourselves with exceptions.
+ if (i < list.length - 1)
+ setTimeout(notifyList, 0, i + 1);
+
+ list[i](e);
+ }
+
+ var list = this.observers_[subject];
+ if (list) {
+ // Copy the list, in case it changes while we're notifying.
+ list = [].concat(list);
+ }
+
+ if (opt_lastCallback) {
+ if (list) {
+ list.push(opt_lastCallback);
+ } else {
+ list = [opt_lastCallback];
+ }
+ }
+
+ if (list)
+ setTimeout(notifyList, 0, 0);
+};
+// SOURCE FILE: hterm/js/hterm_screen.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+lib.rtdep('lib.f', 'lib.wc',
+ 'hterm.RowCol', 'hterm.Size', 'hterm.TextAttributes');
+
+/**
+ * @fileoverview This class represents a single terminal screen full of text.
+ *
+ * It maintains the current cursor position and has basic methods for text
+ * insert and overwrite, and adding or removing rows from the screen.
+ *
+ * This class has no knowledge of the scrollback buffer.
+ *
+ * The number of rows on the screen is determined only by the number of rows
+ * that the caller inserts into the screen. If a caller wants to ensure a
+ * constant number of rows on the screen, it's their responsibility to remove a
+ * row for each row inserted.
+ *
+ * The screen width, in contrast, is enforced locally.
+ *
+ *
+ * In practice...
+ * - The hterm.Terminal class holds two hterm.Screen instances. One for the
+ * primary screen and one for the alternate screen.
+ *
+ * - The html.Screen class only cares that rows are HTMLElements. In the
+ * larger context of hterm, however, the rows happen to be displayed by an
+ * hterm.ScrollPort and have to follow a few rules as a result. Each
+ * row must be rooted by the custom HTML tag 'x-row', and each must have a
+ * rowIndex property that corresponds to the index of the row in the context
+ * of the scrollback buffer. These invariants are enforced by hterm.Terminal
+ * because that is the class using the hterm.Screen in the context of an
+ * hterm.ScrollPort.
+ */
+
+/**
+ * Create a new screen instance.
+ *
+ * The screen initially has no rows and a maximum column count of 0.
+ *
+ * @param {integer} opt_columnCount The maximum number of columns for this
+ * screen. See insertString() and overwriteString() for information about
+ * what happens when too many characters are added too a row. Defaults to
+ * 0 if not provided.
+ */
+hterm.Screen = function(opt_columnCount) {
+ /**
+ * Public, read-only access to the rows in this screen.
+ */
+ this.rowsArray = [];
+
+ // The max column width for this screen.
+ this.columnCount_ = opt_columnCount || 80;
+
+ // The current color, bold, underline and blink attributes.
+ this.textAttributes = new hterm.TextAttributes(window.document);
+
+ // Current zero-based cursor coordinates.
+ this.cursorPosition = new hterm.RowCol(0, 0);
+
+ // Saved state used by DECSC and related settings. This is only for saving
+ // and restoring specific state, not for the current/active state.
+ this.cursorState_ = new hterm.Screen.CursorState(this);
+
+ // The node containing the row that the cursor is positioned on.
+ this.cursorRowNode_ = null;
+
+ // The node containing the span of text that the cursor is positioned on.
+ this.cursorNode_ = null;
+
+ // The offset in column width into cursorNode_ where the cursor is positioned.
+ this.cursorOffset_ = null;
+
+ // Regexes for expanding word selections.
+ this.wordBreakMatchLeft = null;
+ this.wordBreakMatchRight = null;
+ this.wordBreakMatchMiddle = null;
+};
+
+/**
+ * Return the screen size as an hterm.Size object.
+ *
+ * @return {hterm.Size} hterm.Size object representing the current number
+ * of rows and columns in this screen.
+ */
+hterm.Screen.prototype.getSize = function() {
+ return new hterm.Size(this.columnCount_, this.rowsArray.length);
+};
+
+/**
+ * Return the current number of rows in this screen.
+ *
+ * @return {integer} The number of rows in this screen.
+ */
+hterm.Screen.prototype.getHeight = function() {
+ return this.rowsArray.length;
+};
+
+/**
+ * Return the current number of columns in this screen.
+ *
+ * @return {integer} The number of columns in this screen.
+ */
+hterm.Screen.prototype.getWidth = function() {
+ return this.columnCount_;
+};
+
+/**
+ * Set the maximum number of columns per row.
+ *
+ * @param {integer} count The maximum number of columns per row.
+ */
+hterm.Screen.prototype.setColumnCount = function(count) {
+ this.columnCount_ = count;
+
+ if (this.cursorPosition.column >= count)
+ this.setCursorPosition(this.cursorPosition.row, count - 1);
+};
+
+/**
+ * Remove the first row from the screen and return it.
+ *
+ * @return {HTMLElement} The first row in this screen.
+ */
+hterm.Screen.prototype.shiftRow = function() {
+ return this.shiftRows(1)[0];
+};
+
+/**
+ * Remove rows from the top of the screen and return them as an array.
+ *
+ * @param {integer} count The number of rows to remove.
+ * @return {Array.<HTMLElement>} The selected rows.
+ */
+hterm.Screen.prototype.shiftRows = function(count) {
+ return this.rowsArray.splice(0, count);
+};
+
+/**
+ * Insert a row at the top of the screen.
+ *
+ * @param {HTMLElement} row The row to insert.
+ */
+hterm.Screen.prototype.unshiftRow = function(row) {
+ this.rowsArray.splice(0, 0, row);
+};
+
+/**
+ * Insert rows at the top of the screen.
+ *
+ * @param {Array.<HTMLElement>} rows The rows to insert.
+ */
+hterm.Screen.prototype.unshiftRows = function(rows) {
+ this.rowsArray.unshift.apply(this.rowsArray, rows);
+};
+
+/**
+ * Remove the last row from the screen and return it.
+ *
+ * @return {HTMLElement} The last row in this screen.
+ */
+hterm.Screen.prototype.popRow = function() {
+ return this.popRows(1)[0];
+};
+
+/**
+ * Remove rows from the bottom of the screen and return them as an array.
+ *
+ * @param {integer} count The number of rows to remove.
+ * @return {Array.<HTMLElement>} The selected rows.
+ */
+hterm.Screen.prototype.popRows = function(count) {
+ return this.rowsArray.splice(this.rowsArray.length - count, count);
+};
+
+/**
+ * Insert a row at the bottom of the screen.
+ *
+ * @param {HTMLElement} row The row to insert.
+ */
+hterm.Screen.prototype.pushRow = function(row) {
+ this.rowsArray.push(row);
+};
+
+/**
+ * Insert rows at the bottom of the screen.
+ *
+ * @param {Array.<HTMLElement>} rows The rows to insert.
+ */
+hterm.Screen.prototype.pushRows = function(rows) {
+ rows.push.apply(this.rowsArray, rows);
+};
+
+/**
+ * Insert a row at the specified row of the screen.
+ *
+ * @param {integer} index The index to insert the row.
+ * @param {HTMLElement} row The row to insert.
+ */
+hterm.Screen.prototype.insertRow = function(index, row) {
+ this.rowsArray.splice(index, 0, row);
+};
+
+/**
+ * Insert rows at the specified row of the screen.
+ *
+ * @param {integer} index The index to insert the rows.
+ * @param {Array.<HTMLElement>} rows The rows to insert.
+ */
+hterm.Screen.prototype.insertRows = function(index, rows) {
+ for (var i = 0; i < rows.length; i++) {
+ this.rowsArray.splice(index + i, 0, rows[i]);
+ }
+};
+
+/**
+ * Remove a row from the screen and return it.
+ *
+ * @param {integer} index The index of the row to remove.
+ * @return {HTMLElement} The selected row.
+ */
+hterm.Screen.prototype.removeRow = function(index) {
+ return this.rowsArray.splice(index, 1)[0];
+};
+
+/**
+ * Remove rows from the bottom of the screen and return them as an array.
+ *
+ * @param {integer} index The index to start removing rows.
+ * @param {integer} count The number of rows to remove.
+ * @return {Array.<HTMLElement>} The selected rows.
+ */
+hterm.Screen.prototype.removeRows = function(index, count) {
+ return this.rowsArray.splice(index, count);
+};
+
+/**
+ * Invalidate the current cursor position.
+ *
+ * This sets this.cursorPosition to (0, 0) and clears out some internal
+ * data.
+ *
+ * Attempting to insert or overwrite text while the cursor position is invalid
+ * will raise an obscure exception.
+ */
+hterm.Screen.prototype.invalidateCursorPosition = function() {
+ this.cursorPosition.move(0, 0);
+ this.cursorRowNode_ = null;
+ this.cursorNode_ = null;
+ this.cursorOffset_ = null;
+};
+
+/**
+ * Clear the contents of the cursor row.
+ */
+hterm.Screen.prototype.clearCursorRow = function() {
+ this.cursorRowNode_.innerHTML = '';
+ this.cursorRowNode_.removeAttribute('line-overflow');
+ this.cursorOffset_ = 0;
+ this.cursorPosition.column = 0;
+ this.cursorPosition.overflow = false;
+
+ var text;
+ if (this.textAttributes.isDefault()) {
+ text = '';
+ } else {
+ text = lib.f.getWhitespace(this.columnCount_);
+ }
+
+ // We shouldn't honor inverse colors when clearing an area, to match
+ // xterm's back color erase behavior.
+ var inverse = this.textAttributes.inverse;
+ this.textAttributes.inverse = false;
+ this.textAttributes.syncColors();
+
+ var node = this.textAttributes.createContainer(text);
+ this.cursorRowNode_.appendChild(node);
+ this.cursorNode_ = node;
+
+ this.textAttributes.inverse = inverse;
+ this.textAttributes.syncColors();
+};
+
+/**
+ * Mark the current row as having overflowed to the next line.
+ *
+ * The line overflow state is used when converting a range of rows into text.
+ * It makes it possible to recombine two or more overflow terminal rows into
+ * a single line.
+ *
+ * This is distinct from the cursor being in the overflow state. Cursor
+ * overflow indicates that printing at the cursor position will commit a
+ * line overflow, unless it is preceded by a repositioning of the cursor
+ * to a non-overflow state.
+ */
+hterm.Screen.prototype.commitLineOverflow = function() {
+ this.cursorRowNode_.setAttribute('line-overflow', true);
+};
+
+/**
+ * Relocate the cursor to a give row and column.
+ *
+ * @param {integer} row The zero based row.
+ * @param {integer} column The zero based column.
+ */
+hterm.Screen.prototype.setCursorPosition = function(row, column) {
+ if (!this.rowsArray.length) {
+ console.warn('Attempt to set cursor position on empty screen.');
+ return;
+ }
+
+ if (row >= this.rowsArray.length) {
+ console.error('Row out of bounds: ' + row);
+ row = this.rowsArray.length - 1;
+ } else if (row < 0) {
+ console.error('Row out of bounds: ' + row);
+ row = 0;
+ }
+
+ if (column >= this.columnCount_) {
+ console.error('Column out of bounds: ' + column);
+ column = this.columnCount_ - 1;
+ } else if (column < 0) {
+ console.error('Column out of bounds: ' + column);
+ column = 0;
+ }
+
+ this.cursorPosition.overflow = false;
+
+ var rowNode = this.rowsArray[row];
+ var node = rowNode.firstChild;
+
+ if (!node) {
+ node = rowNode.ownerDocument.createTextNode('');
+ rowNode.appendChild(node);
+ }
+
+ var currentColumn = 0;
+
+ if (rowNode == this.cursorRowNode_) {
+ if (column >= this.cursorPosition.column - this.cursorOffset_) {
+ node = this.cursorNode_;
+ currentColumn = this.cursorPosition.column - this.cursorOffset_;
+ }
+ } else {
+ this.cursorRowNode_ = rowNode;
+ }
+
+ this.cursorPosition.move(row, column);
+
+ while (node) {
+ var offset = column - currentColumn;
+ var width = hterm.TextAttributes.nodeWidth(node);
+ if (!node.nextSibling || width > offset) {
+ this.cursorNode_ = node;
+ this.cursorOffset_ = offset;
+ return;
+ }
+
+ currentColumn += width;
+ node = node.nextSibling;
+ }
+};
+
+/**
+ * Set the provided selection object to be a caret selection at the current
+ * cursor position.
+ */
+hterm.Screen.prototype.syncSelectionCaret = function(selection) {
+ try {
+ selection.collapse(this.cursorNode_, this.cursorOffset_);
+ } catch (firefoxIgnoredException) {
+ // FF can throw an exception if the range is off, rather than just not
+ // performing the collapse.
+ }
+};
+
+/**
+ * Split a single node into two nodes at the given offset.
+ *
+ * For example:
+ * Given the DOM fragment '<div><span>Hello World</span></div>', call splitNode_
+ * passing the span and an offset of 6. This would modify the fragment to
+ * become: '<div><span>Hello </span><span>World</span></div>'. If the span
+ * had any attributes they would have been copied to the new span as well.
+ *
+ * The to-be-split node must have a container, so that the new node can be
+ * placed next to it.
+ *
+ * @param {HTMLNode} node The node to split.
+ * @param {integer} offset The offset into the node where the split should
+ * occur.
+ */
+hterm.Screen.prototype.splitNode_ = function(node, offset) {
+ var afterNode = node.cloneNode(false);
+
+ var textContent = node.textContent;
+ node.textContent = hterm.TextAttributes.nodeSubstr(node, 0, offset);
+ afterNode.textContent = lib.wc.substr(textContent, offset);
+
+ if (afterNode.textContent)
+ node.parentNode.insertBefore(afterNode, node.nextSibling);
+ if (!node.textContent)
+ node.parentNode.removeChild(node);
+};
+
+/**
+ * Ensure that text is clipped and the cursor is clamped to the column count.
+ */
+hterm.Screen.prototype.maybeClipCurrentRow = function() {
+ var width = hterm.TextAttributes.nodeWidth(this.cursorRowNode_);
+
+ if (width <= this.columnCount_) {
+ // Current row does not need clipping, but may need clamping.
+ if (this.cursorPosition.column >= this.columnCount_) {
+ this.setCursorPosition(this.cursorPosition.row, this.columnCount_ - 1);
+ this.cursorPosition.overflow = true;
+ }
+
+ return;
+ }
+
+ // Save off the current column so we can maybe restore it later.
+ var currentColumn = this.cursorPosition.column;
+
+ // Move the cursor to the final column.
+ this.setCursorPosition(this.cursorPosition.row, this.columnCount_ - 1);
+
+ // Remove any text that partially overflows.
+ width = hterm.TextAttributes.nodeWidth(this.cursorNode_);
+
+ if (this.cursorOffset_ < width - 1) {
+ this.cursorNode_.textContent = hterm.TextAttributes.nodeSubstr(
+ this.cursorNode_, 0, this.cursorOffset_ + 1);
+ }
+
+ // Remove all nodes after the cursor.
+ var rowNode = this.cursorRowNode_;
+ var node = this.cursorNode_.nextSibling;
+
+ while (node) {
+ rowNode.removeChild(node);
+ node = this.cursorNode_.nextSibling;
+ }
+
+ if (currentColumn < this.columnCount_) {
+ // If the cursor was within the screen before we started then restore its
+ // position.
+ this.setCursorPosition(this.cursorPosition.row, currentColumn);
+ } else {
+ // Otherwise leave it at the the last column in the overflow state.
+ this.cursorPosition.overflow = true;
+ }
+};
+
+/**
+ * Insert a string at the current character position using the current
+ * text attributes.
+ *
+ * You must call maybeClipCurrentRow() after in order to clip overflowed
+ * text and clamp the cursor.
+ *
+ * It is also up to the caller to properly maintain the line overflow state
+ * using hterm.Screen..commitLineOverflow().
+ */
+hterm.Screen.prototype.insertString = function(str, wcwidth=undefined) {
+ var cursorNode = this.cursorNode_;
+ var cursorNodeText = cursorNode.textContent;
+
+ this.cursorRowNode_.removeAttribute('line-overflow');
+
+ // We may alter the width of the string by prepending some missing
+ // whitespaces, so we need to record the string width ahead of time.
+ if (wcwidth === undefined)
+ wcwidth = lib.wc.strWidth(str);
+
+ // No matter what, before this function exits the cursor column will have
+ // moved this much.
+ this.cursorPosition.column += wcwidth;
+
+ // Local cache of the cursor offset.
+ var offset = this.cursorOffset_;
+
+ // Reverse offset is the offset measured from the end of the string.
+ // Zero implies that the cursor is at the end of the cursor node.
+ var reverseOffset = hterm.TextAttributes.nodeWidth(cursorNode) - offset;
+
+ if (reverseOffset < 0) {
+ // A negative reverse offset means the cursor is positioned past the end
+ // of the characters on this line. We'll need to insert the missing
+ // whitespace.
+ var ws = lib.f.getWhitespace(-reverseOffset);
+
+ // This whitespace should be completely unstyled. Underline, background
+ // color, and strikethrough would be visible on whitespace, so we can't use
+ // one of those spans to hold the text.
+ if (!(this.textAttributes.underline ||
+ this.textAttributes.strikethrough ||
+ this.textAttributes.background ||
+ this.textAttributes.wcNode ||
+ !this.textAttributes.asciiNode ||
+ this.textAttributes.tileData != null)) {
+ // Best case scenario, we can just pretend the spaces were part of the
+ // original string.
+ str = ws + str;
+ } else if (cursorNode.nodeType == Node.TEXT_NODE ||
+ !(cursorNode.wcNode ||
+ !cursorNode.asciiNode ||
+ cursorNode.tileNode ||
+ cursorNode.style.textDecoration ||
+ cursorNode.style.textDecorationStyle ||
+ cursorNode.style.textDecorationLine ||
+ cursorNode.style.backgroundColor)) {
+ // Second best case, the current node is able to hold the whitespace.
+ cursorNode.textContent = (cursorNodeText += ws);
+ } else {
+ // Worst case, we have to create a new node to hold the whitespace.
+ var wsNode = cursorNode.ownerDocument.createTextNode(ws);
+ this.cursorRowNode_.insertBefore(wsNode, cursorNode.nextSibling);
+ this.cursorNode_ = cursorNode = wsNode;
+ this.cursorOffset_ = offset = -reverseOffset;
+ cursorNodeText = ws;
+ }
+
+ // We now know for sure that we're at the last character of the cursor node.
+ reverseOffset = 0;
+ }
+
+ if (this.textAttributes.matchesContainer(cursorNode)) {
+ // The new text can be placed directly in the cursor node.
+ if (reverseOffset == 0) {
+ cursorNode.textContent = cursorNodeText + str;
+ } else if (offset == 0) {
+ cursorNode.textContent = str + cursorNodeText;
+ } else {
+ cursorNode.textContent =
+ hterm.TextAttributes.nodeSubstr(cursorNode, 0, offset) +
+ str + hterm.TextAttributes.nodeSubstr(cursorNode, offset);
+ }
+
+ this.cursorOffset_ += wcwidth;
+ return;
+ }
+
+ // The cursor node is the wrong style for the new text. If we're at the
+ // beginning or end of the cursor node, then the adjacent node is also a
+ // potential candidate.
+
+ if (offset == 0) {
+ // At the beginning of the cursor node, the check the previous sibling.
+ var previousSibling = cursorNode.previousSibling;
+ if (previousSibling &&
+ this.textAttributes.matchesContainer(previousSibling)) {
+ previousSibling.textContent += str;
+ this.cursorNode_ = previousSibling;
+ this.cursorOffset_ = lib.wc.strWidth(previousSibling.textContent);
+ return;
+ }
+
+ var newNode = this.textAttributes.createContainer(str);
+ this.cursorRowNode_.insertBefore(newNode, cursorNode);
+ this.cursorNode_ = newNode;
+ this.cursorOffset_ = wcwidth;
+ return;
+ }
+
+ if (reverseOffset == 0) {
+ // At the end of the cursor node, the check the next sibling.
+ var nextSibling = cursorNode.nextSibling;
+ if (nextSibling &&
+ this.textAttributes.matchesContainer(nextSibling)) {
+ nextSibling.textContent = str + nextSibling.textContent;
+ this.cursorNode_ = nextSibling;
+ this.cursorOffset_ = lib.wc.strWidth(str);
+ return;
+ }
+
+ var newNode = this.textAttributes.createContainer(str);
+ this.cursorRowNode_.insertBefore(newNode, nextSibling);
+ this.cursorNode_ = newNode;
+ // We specifically need to include any missing whitespace here, since it's
+ // going in a new node.
+ this.cursorOffset_ = hterm.TextAttributes.nodeWidth(newNode);
+ return;
+ }
+
+ // Worst case, we're somewhere in the middle of the cursor node. We'll
+ // have to split it into two nodes and insert our new container in between.
+ this.splitNode_(cursorNode, offset);
+ var newNode = this.textAttributes.createContainer(str);
+ this.cursorRowNode_.insertBefore(newNode, cursorNode.nextSibling);
+ this.cursorNode_ = newNode;
+ this.cursorOffset_ = wcwidth;
+};
+
+/**
+ * Overwrite the text at the current cursor position.
+ *
+ * You must call maybeClipCurrentRow() after in order to clip overflowed
+ * text and clamp the cursor.
+ *
+ * It is also up to the caller to properly maintain the line overflow state
+ * using hterm.Screen..commitLineOverflow().
+ */
+hterm.Screen.prototype.overwriteString = function(str, wcwidth=undefined) {
+ var maxLength = this.columnCount_ - this.cursorPosition.column;
+ if (!maxLength)
+ return [str];
+
+ if (wcwidth === undefined)
+ wcwidth = lib.wc.strWidth(str);
+
+ if (this.textAttributes.matchesContainer(this.cursorNode_) &&
+ this.cursorNode_.textContent.substr(this.cursorOffset_) == str) {
+ // This overwrite would be a no-op, just move the cursor and return.
+ this.cursorOffset_ += wcwidth;
+ this.cursorPosition.column += wcwidth;
+ return;
+ }
+
+ this.deleteChars(Math.min(wcwidth, maxLength));
+ this.insertString(str, wcwidth);
+};
+
+/**
+ * Forward-delete one or more characters at the current cursor position.
+ *
+ * Text to the right of the deleted characters is shifted left. Only affects
+ * characters on the same row as the cursor.
+ *
+ * @param {integer} count The column width of characters to delete. This is
+ * clamped to the column width minus the cursor column.
+ * @return {integer} The column width of the characters actually deleted.
+ */
+hterm.Screen.prototype.deleteChars = function(count) {
+ var node = this.cursorNode_;
+ var offset = this.cursorOffset_;
+
+ var currentCursorColumn = this.cursorPosition.column;
+ count = Math.min(count, this.columnCount_ - currentCursorColumn);
+ if (!count)
+ return 0;
+
+ var rv = count;
+ var startLength, endLength;
+
+ while (node && count) {
+ // Sanity check so we don't loop forever, but we don't also go quietly.
+ if (count < 0) {
+ console.error(`Deleting ${rv} chars went negative: ${count}`);
+ break;
+ }
+
+ startLength = hterm.TextAttributes.nodeWidth(node);
+ node.textContent = hterm.TextAttributes.nodeSubstr(node, 0, offset) +
+ hterm.TextAttributes.nodeSubstr(node, offset + count);
+ endLength = hterm.TextAttributes.nodeWidth(node);
+
+ // Deal with splitting wide characters. There are two ways: we could delete
+ // the first column or the second column. In both cases, we delete the wide
+ // character and replace one of the columns with a space (since the other
+ // was deleted). If there are more chars to delete, the next loop will pick
+ // up the slack.
+ if (node.wcNode && offset < startLength &&
+ ((endLength && startLength == endLength) || (!endLength && offset == 1))) {
+ // No characters were deleted when there should be. We're probably trying
+ // to delete one column width from a wide character node. We remove the
+ // wide character node here and replace it with a single space.
+ var spaceNode = this.textAttributes.createContainer(' ');
+ node.parentNode.insertBefore(spaceNode, offset ? node : node.nextSibling);
+ node.textContent = '';
+ endLength = 0;
+ count -= 1;
+ } else
+ count -= startLength - endLength;
+
+ var nextNode = node.nextSibling;
+ if (endLength == 0 && node != this.cursorNode_) {
+ node.parentNode.removeChild(node);
+ }
+ node = nextNode;
+ offset = 0;
+ }
+
+ // Remove this.cursorNode_ if it is an empty non-text node.
+ if (this.cursorNode_.nodeType != Node.TEXT_NODE &&
+ !this.cursorNode_.textContent) {
+ var cursorNode = this.cursorNode_;
+ if (cursorNode.previousSibling) {
+ this.cursorNode_ = cursorNode.previousSibling;
+ this.cursorOffset_ = hterm.TextAttributes.nodeWidth(
+ cursorNode.previousSibling);
+ } else if (cursorNode.nextSibling) {
+ this.cursorNode_ = cursorNode.nextSibling;
+ this.cursorOffset_ = 0;
+ } else {
+ var emptyNode = this.cursorRowNode_.ownerDocument.createTextNode('');
+ this.cursorRowNode_.appendChild(emptyNode);
+ this.cursorNode_ = emptyNode;
+ this.cursorOffset_ = 0;
+ }
+ this.cursorRowNode_.removeChild(cursorNode);
+ }
+
+ return rv;
+};
+
+/**
+ * Finds first X-ROW of a line containing specified X-ROW.
+ * Used to support line overflow.
+ *
+ * @param {Node} row X-ROW to begin search for first row of line.
+ * @return {Node} The X-ROW that is at the beginning of the line.
+ **/
+hterm.Screen.prototype.getLineStartRow_ = function(row) {
+ while (row.previousSibling &&
+ row.previousSibling.hasAttribute('line-overflow')) {
+ row = row.previousSibling;
+ }
+ return row;
+};
+
+/**
+ * Gets text of a line beginning with row.
+ * Supports line overflow.
+ *
+ * @param {Node} row First X-ROW of line.
+ * @return {string} Text content of line.
+ **/
+hterm.Screen.prototype.getLineText_ = function(row) {
+ var rowText = "";
+ while (row) {
+ rowText += row.textContent;
+ if (row.hasAttribute('line-overflow')) {
+ row = row.nextSibling;
+ } else {
+ break;
+ }
+ }
+ return rowText;
+};
+
+/**
+ * Returns X-ROW that is ancestor of the node.
+ *
+ * @param {Node} node Node to get X-ROW ancestor for.
+ * @return {Node} X-ROW ancestor of node, or null if not found.
+ **/
+hterm.Screen.prototype.getXRowAncestor_ = function(node) {
+ while (node) {
+ if (node.nodeName === 'X-ROW')
+ break;
+ node = node.parentNode;
+ }
+ return node;
+};
+
+/**
+ * Returns position within line of character at offset within node.
+ * Supports line overflow.
+ *
+ * @param {Node} row X-ROW at beginning of line.
+ * @param {Node} node Node to get position of.
+ * @param {integer} offset Offset into node.
+ *
+ * @return {integer} Position within line of character at offset within node.
+ **/
+hterm.Screen.prototype.getPositionWithOverflow_ = function(row, node, offset) {
+ if (!node)
+ return -1;
+ var ancestorRow = this.getXRowAncestor_(node);
+ if (!ancestorRow)
+ return -1;
+ var position = 0;
+ while (ancestorRow != row) {
+ position += hterm.TextAttributes.nodeWidth(row);
+ if (row.hasAttribute('line-overflow') && row.nextSibling) {
+ row = row.nextSibling;
+ } else {
+ return -1;
+ }
+ }
+ return position + this.getPositionWithinRow_(row, node, offset);
+};
+
+/**
+ * Returns position within row of character at offset within node.
+ * Does not support line overflow.
+ *
+ * @param {Node} row X-ROW to get position within.
+ * @param {Node} node Node to get position for.
+ * @param {integer} offset Offset within node to get position for.
+ * @return {integer} Position within row of character at offset within node.
+ **/
+hterm.Screen.prototype.getPositionWithinRow_ = function(row, node, offset) {
+ if (node.parentNode != row) {
+ // If we traversed to the top node, then there's nothing to find here.
+ if (node.parentNode == null)
+ return -1;
+
+ return this.getPositionWithinRow_(node.parentNode, node, offset) +
+ this.getPositionWithinRow_(row, node.parentNode, 0);
+ }
+ var position = 0;
+ for (var i = 0; i < row.childNodes.length; i++) {
+ var currentNode = row.childNodes[i];
+ if (currentNode == node)
+ return position + offset;
+ position += hterm.TextAttributes.nodeWidth(currentNode);
+ }
+ return -1;
+};
+
+/**
+ * Returns the node and offset corresponding to position within line.
+ * Supports line overflow.
+ *
+ * @param {Node} row X-ROW at beginning of line.
+ * @param {integer} position Position within line to retrieve node and offset.
+ * @return {Array} Two element array containing node and offset respectively.
+ **/
+hterm.Screen.prototype.getNodeAndOffsetWithOverflow_ = function(row, position) {
+ while (row && position > hterm.TextAttributes.nodeWidth(row)) {
+ if (row.hasAttribute('line-overflow') && row.nextSibling) {
+ position -= hterm.TextAttributes.nodeWidth(row);
+ row = row.nextSibling;
+ } else {
+ return -1;
+ }
+ }
+ return this.getNodeAndOffsetWithinRow_(row, position);
+};
+
+/**
+ * Returns the node and offset corresponding to position within row.
+ * Does not support line overflow.
+ *
+ * @param {Node} row X-ROW to get position within.
+ * @param {integer} position Position within row to retrieve node and offset.
+ * @return {Array} Two element array containing node and offset respectively.
+ **/
+hterm.Screen.prototype.getNodeAndOffsetWithinRow_ = function(row, position) {
+ for (var i = 0; i < row.childNodes.length; i++) {
+ var node = row.childNodes[i];
+ var nodeTextWidth = hterm.TextAttributes.nodeWidth(node);
+ if (position <= nodeTextWidth) {
+ if (node.nodeName === 'SPAN') {
+ /** Drill down to node contained by SPAN. **/
+ return this.getNodeAndOffsetWithinRow_(node, position);
+ } else {
+ return [node, position];
+ }
+ }
+ position -= nodeTextWidth;
+ }
+ return null;
+};
+
+/**
+ * Returns the node and offset corresponding to position within line.
+ * Supports line overflow.
+ *
+ * @param {Node} row X-ROW at beginning of line.
+ * @param {integer} start Start position of range within line.
+ * @param {integer} end End position of range within line.
+ * @param {Range} range Range to modify.
+ **/
+hterm.Screen.prototype.setRange_ = function(row, start, end, range) {
+ var startNodeAndOffset = this.getNodeAndOffsetWithOverflow_(row, start);
+ if (startNodeAndOffset == null)
+ return;
+ var endNodeAndOffset = this.getNodeAndOffsetWithOverflow_(row, end);
+ if (endNodeAndOffset == null)
+ return;
+ range.setStart(startNodeAndOffset[0], startNodeAndOffset[1]);
+ range.setEnd(endNodeAndOffset[0], endNodeAndOffset[1]);
+};
+
+/**
+ * Expands selection to surrounding string with word break matches.
+ *
+ * @param {Selection} selection Selection to expand.
+ * @param {string} leftMatch left word break match.
+ * @param {string} rightMatch right word break match.
+ * @param {string} insideMatch inside word break match.
+ */
+hterm.Screen.prototype.expandSelectionWithWordBreakMatches_ =
+ function(selection, leftMatch, rightMatch, insideMatch) {
+ if (!selection)
+ return;
+
+ var range = selection.getRangeAt(0);
+ if (!range || range.toString().match(/\s/))
+ return;
+
+ const rowElement = this.getXRowAncestor_(range.startContainer);
+ if (!rowElement)
+ return;
+ const row = this.getLineStartRow_(rowElement);
+ if (!row)
+ return;
+
+ var startPosition = this.getPositionWithOverflow_(row,
+ range.startContainer,
+ range.startOffset);
+ if (startPosition == -1)
+ return;
+ var endPosition = this.getPositionWithOverflow_(row,
+ range.endContainer,
+ range.endOffset);
+ if (endPosition == -1)
+ return;
+
+ //Move start to the left.
+ var rowText = this.getLineText_(row);
+ var lineUpToRange = lib.wc.substring(rowText, 0, endPosition);
+ var leftRegularExpression = new RegExp(leftMatch + insideMatch + "$");
+ var expandedStart = lineUpToRange.search(leftRegularExpression);
+ if (expandedStart == -1 || expandedStart > startPosition)
+ return;
+
+ //Move end to the right.
+ var lineFromRange = lib.wc.substring(rowText, startPosition,
+ lib.wc.strWidth(rowText));
+ var rightRegularExpression = new RegExp("^" + insideMatch + rightMatch);
+ var found = lineFromRange.match(rightRegularExpression);
+ if (!found)
+ return;
+ var expandedEnd = startPosition + lib.wc.strWidth(found[0]);
+ if (expandedEnd == -1 || expandedEnd < endPosition)
+ return;
+
+ this.setRange_(row, expandedStart, expandedEnd, range);
+ selection.addRange(range);
+};
+
+/**
+ * Expands selection to surrounding string using the user's settings.
+ *
+ * @param {Selection} selection Selection to expand.
+ */
+hterm.Screen.prototype.expandSelection = function(selection) {
+ this.expandSelectionWithWordBreakMatches_(
+ selection,
+ this.wordBreakMatchLeft,
+ this.wordBreakMatchRight,
+ this.wordBreakMatchMiddle);
+};
+
+/**
+ * Expands selection to surrounding URL using a set of fixed match settings.
+ *
+ * @param {Selection} selection Selection to expand.
+ */
+hterm.Screen.prototype.expandSelectionForUrl = function(selection) {
+ this.expandSelectionWithWordBreakMatches_(
+ selection,
+ "[^\\s\\[\\](){}<>\"'\\^!@#$%&*,;:`]",
+ "[^\\s\\[\\](){}<>\"'\\^!@#$%&*,;:~.`]",
+ "[^\\s\\[\\](){}<>\"'\\^]*");
+};
+
+/**
+ * Save the current cursor state to the corresponding screens.
+ *
+ * @param {hterm.VT} vt The VT object to read graphic codeset details from.
+ */
+hterm.Screen.prototype.saveCursorAndState = function(vt) {
+ this.cursorState_.save(vt);
+};
+
+/**
+ * Restore the saved cursor state in the corresponding screens.
+ *
+ * @param {hterm.VT} vt The VT object to write graphic codeset details to.
+ */
+hterm.Screen.prototype.restoreCursorAndState = function(vt) {
+ this.cursorState_.restore(vt);
+};
+
+/**
+ * Track all the things related to the current "cursor".
+ *
+ * The set of things saved & restored here is defined by DEC:
+ * https://vt100.net/docs/vt510-rm/DECSC.html
+ * - Cursor position
+ * - Character attributes set by the SGR command
+ * - Character sets (G0, G1, G2, or G3) currently in GL and GR
+ * - Wrap flag (autowrap or no autowrap)
+ * - State of origin mode (DECOM)
+ * - Selective erase attribute
+ * - Any single shift 2 (SS2) or single shift 3 (SS3) functions sent
+ *
+ * These are done on a per-screen basis.
+ */
+hterm.Screen.CursorState = function(screen) {
+ this.screen_ = screen;
+ this.cursor = null;
+ this.textAttributes = null;
+ this.GL = this.GR = this.G0 = this.G1 = this.G2 = this.G3 = null;
+};
+
+/**
+ * Save all the cursor state.
+ *
+ * @param {hterm.VT} vt The VT object to read graphic codeset details from.
+ */
+hterm.Screen.CursorState.prototype.save = function(vt) {
+ this.cursor = vt.terminal.saveCursor();
+
+ this.textAttributes = this.screen_.textAttributes.clone();
+
+ this.GL = vt.GL;
+ this.GR = vt.GR;
+
+ this.G0 = vt.G0;
+ this.G1 = vt.G1;
+ this.G2 = vt.G2;
+ this.G3 = vt.G3;
+};
+
+/**
+ * Restore the previously saved cursor state.
+ *
+ * @param {hterm.VT} vt The VT object to write graphic codeset details to.
+ */
+hterm.Screen.CursorState.prototype.restore = function(vt) {
+ vt.terminal.restoreCursor(this.cursor);
+
+ // Cursor restore includes char attributes (bold/etc...), but does not change
+ // the color palette (which are a terminal setting).
+ const tattrs = this.textAttributes.clone();
+ tattrs.colorPalette = this.screen_.textAttributes.colorPalette;
+ tattrs.syncColors();
+
+ this.screen_.textAttributes = tattrs;
+
+ vt.GL = this.GL;
+ vt.GR = this.GR;
+
+ vt.G0 = this.G0;
+ vt.G1 = this.G1;
+ vt.G2 = this.G2;
+ vt.G3 = this.G3;
+};
+// SOURCE FILE: hterm/js/hterm_scrollport.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+lib.rtdep('lib.f', 'hterm.PubSub', 'hterm.Size');
+
+/**
+ * A 'viewport' view of fixed-height rows with support for selection and
+ * copy-to-clipboard.
+ *
+ * 'Viewport' in this case means that only the visible rows are in the DOM.
+ * If the rowProvider has 100,000 rows, but the ScrollPort is only 25 rows
+ * tall, then only 25 dom nodes are created. The ScrollPort will ask the
+ * RowProvider to create new visible rows on demand as they are scrolled in
+ * to the visible area.
+ *
+ * This viewport is designed so that select and copy-to-clipboard still works,
+ * even when all or part of the selection is scrolled off screen.
+ *
+ * Note that the X11 mouse clipboard does not work properly when all or part
+ * of the selection is off screen. It would be difficult to fix this without
+ * adding significant overhead to pathologically large selection cases.
+ *
+ * The RowProvider should return rows rooted by the custom tag name 'x-row'.
+ * This ensures that we can quickly assign the correct display height
+ * to the rows with css.
+ *
+ * @param {RowProvider} rowProvider An object capable of providing rows as
+ * raw text or row nodes.
+ */
+hterm.ScrollPort = function(rowProvider) {
+ hterm.PubSub.addBehavior(this);
+
+ this.rowProvider_ = rowProvider;
+
+ // SWAG the character size until we can measure it.
+ this.characterSize = new hterm.Size(10, 10);
+
+ // DOM node used for character measurement.
+ this.ruler_ = null;
+
+ this.selection = new hterm.ScrollPort.Selection(this);
+
+ // A map of rowIndex => rowNode for each row that is drawn as part of a
+ // pending redraw_() call. Null if there is no pending redraw_ call.
+ this.currentRowNodeCache_ = null;
+
+ // A map of rowIndex => rowNode for each row that was drawn as part of the
+ // previous redraw_() call.
+ this.previousRowNodeCache_ = {};
+
+ // Used during scroll events to detect when the underlying cause is a resize.
+ this.lastScreenWidth_ = null;
+ this.lastScreenHeight_ = null;
+
+ // True if the user should be allowed to select text in the terminal.
+ // This is disabled when the host requests mouse drag events so that we don't
+ // end up with two notions of selection.
+ this.selectionEnabled_ = true;
+
+ // The last row count returned by the row provider, re-populated during
+ // syncScrollHeight().
+ this.lastRowCount_ = 0;
+
+ // The scroll wheel pixel delta multiplier to increase/decrease
+ // the scroll speed of mouse wheel events. See: https://goo.gl/sXelnq
+ this.scrollWheelMultiplier_ = 1;
+
+ // The last touch events we saw to support touch based scrolling. Indexed
+ // by touch identifier since we can have more than one touch active.
+ this.lastTouch_ = {};
+
+ /**
+ * True if the last scroll caused the scrollport to show the final row.
+ */
+ this.isScrolledEnd = true;
+
+ /**
+ * A guess at the current scrollbar width, fixed in resize().
+ */
+ this.currentScrollbarWidthPx = 16;
+
+ /**
+ * Whether the ctrl-v key on the screen should paste.
+ */
+ this.ctrlVPaste = false;
+
+ /**
+ * Whether to paste on dropped text.
+ */
+ this.pasteOnDrop = true;
+
+ this.div_ = null;
+ this.document_ = null;
+
+ // Collection of active timeout handles.
+ this.timeouts_ = {};
+
+ this.observers_ = {};
+
+ this.DEBUG_ = false;
+};
+
+/**
+ * Proxy for the native selection object which understands how to walk up the
+ * DOM to find the containing row node and sort out which comes first.
+ *
+ * @param {hterm.ScrollPort} scrollPort The parent hterm.ScrollPort instance.
+ */
+hterm.ScrollPort.Selection = function(scrollPort) {
+ this.scrollPort_ = scrollPort;
+
+ /**
+ * The row containing the start of the selection.
+ *
+ * This may be partially or fully selected. It may be the selection anchor
+ * or the focus, but its rowIndex is guaranteed to be less-than-or-equal-to
+ * that of the endRow.
+ *
+ * If only one row is selected then startRow == endRow. If there is no
+ * selection or the selection is collapsed then startRow == null.
+ */
+ this.startRow = null;
+
+ /**
+ * The row containing the end of the selection.
+ *
+ * This may be partially or fully selected. It may be the selection anchor
+ * or the focus, but its rowIndex is guaranteed to be greater-than-or-equal-to
+ * that of the startRow.
+ *
+ * If only one row is selected then startRow == endRow. If there is no
+ * selection or the selection is collapsed then startRow == null.
+ */
+ this.endRow = null;
+
+ /**
+ * True if startRow != endRow.
+ */
+ this.isMultiline = null;
+
+ /**
+ * True if the selection is just a point rather than a range.
+ */
+ this.isCollapsed = null;
+};
+
+/**
+ * Given a list of DOM nodes and a container, return the DOM node that
+ * is first according to a depth-first search.
+ *
+ * Returns null if none of the children are found.
+ */
+hterm.ScrollPort.Selection.prototype.findFirstChild = function(
+ parent, childAry) {
+ var node = parent.firstChild;
+
+ while (node) {
+ if (childAry.indexOf(node) != -1)
+ return node;
+
+ if (node.childNodes.length) {
+ var rv = this.findFirstChild(node, childAry);
+ if (rv)
+ return rv;
+ }
+
+ node = node.nextSibling;
+ }
+
+ return null;
+};
+
+/**
+ * Synchronize this object with the current DOM selection.
+ *
+ * This is a one-way synchronization, the DOM selection is copied to this
+ * object, not the other way around.
+ */
+hterm.ScrollPort.Selection.prototype.sync = function() {
+ var self = this;
+
+ // The dom selection object has no way to tell which nodes come first in
+ // the document, so we have to figure that out.
+ //
+ // This function is used when we detect that the "anchor" node is first.
+ function anchorFirst() {
+ self.startRow = anchorRow;
+ self.startNode = selection.anchorNode;
+ self.startOffset = selection.anchorOffset;
+ self.endRow = focusRow;
+ self.endNode = selection.focusNode;
+ self.endOffset = selection.focusOffset;
+ }
+
+ // This function is used when we detect that the "focus" node is first.
+ function focusFirst() {
+ self.startRow = focusRow;
+ self.startNode = selection.focusNode;
+ self.startOffset = selection.focusOffset;
+ self.endRow = anchorRow;
+ self.endNode = selection.anchorNode;
+ self.endOffset = selection.anchorOffset;
+ }
+
+ var selection = this.scrollPort_.getDocument().getSelection();
+
+ this.startRow = null;
+ this.endRow = null;
+ this.isMultiline = null;
+ this.isCollapsed = !selection || selection.isCollapsed;
+
+ if (!selection) {
+ return;
+ }
+
+ // Usually collapsed selections wouldn't be interesting, however screen
+ // readers will set a collapsed selection as they navigate through the DOM.
+ // It is important to preserve these nodes in the DOM as scrolling happens
+ // so that screen reader navigation isn't cleared.
+ const accessibilityEnabled = this.scrollPort_.accessibilityReader_ &&
+ this.scrollPort_.accessibilityReader_.accessibilityEnabled;
+ if (this.isCollapsed && !accessibilityEnabled) {
+ return;
+ }
+
+ var anchorRow = selection.anchorNode;
+ while (anchorRow && anchorRow.nodeName != 'X-ROW') {
+ anchorRow = anchorRow.parentNode;
+ }
+
+ if (!anchorRow) {
+ // Don't set a selection if it's not a row node that's selected.
+ return;
+ }
+
+ var focusRow = selection.focusNode;
+ while (focusRow && focusRow.nodeName != 'X-ROW') {
+ focusRow = focusRow.parentNode;
+ }
+
+ if (!focusRow) {
+ // Don't set a selection if it's not a row node that's selected.
+ return;
+ }
+
+ if (anchorRow.rowIndex < focusRow.rowIndex) {
+ anchorFirst();
+
+ } else if (anchorRow.rowIndex > focusRow.rowIndex) {
+ focusFirst();
+
+ } else if (selection.focusNode == selection.anchorNode) {
+ if (selection.anchorOffset < selection.focusOffset) {
+ anchorFirst();
+ } else {
+ focusFirst();
+ }
+
+ } else {
+ // The selection starts and ends in the same row, but isn't contained all
+ // in a single node.
+ var firstNode = this.findFirstChild(
+ anchorRow, [selection.anchorNode, selection.focusNode]);
+
+ if (!firstNode)
+ throw new Error('Unexpected error syncing selection.');
+
+ if (firstNode == selection.anchorNode) {
+ anchorFirst();
+ } else {
+ focusFirst();
+ }
+ }
+
+ this.isMultiline = anchorRow.rowIndex != focusRow.rowIndex;
+};
+
+
+/**
+ * Turn a div into this hterm.ScrollPort.
+ */
+hterm.ScrollPort.prototype.decorate = function(div, callback) {
+ this.div_ = div;
+
+ this.iframe_ = div.ownerDocument.createElement('iframe');
+ this.iframe_.style.cssText = (
+ 'border: 0;' +
+ 'height: 100%;' +
+ 'position: absolute;' +
+ 'width: 100%');
+
+ div.appendChild(this.iframe_);
+
+ const onLoad = () => {
+ this.paintIframeContents_();
+ if (callback) {
+ callback();
+ }
+ };
+
+ // Insert Iframe content asynchronously in FF. Otherwise when the frame's
+ // load event fires in FF it clears out the content of the iframe.
+ if ('mozInnerScreenX' in window) { // detect a FF only property
+ this.iframe_.addEventListener('load', () => onLoad());
+ } else {
+ onLoad();
+ }
+};
+
+
+/**
+ * Initialises the content of this.iframe_. This needs to be done asynchronously
+ * in FF after the Iframe's load event has fired.
+ * @private
+ */
+hterm.ScrollPort.prototype.paintIframeContents_ = function() {
+ this.iframe_.contentWindow.addEventListener('resize',
+ this.onResize_.bind(this));
+
+ var doc = this.document_ = this.iframe_.contentDocument;
+ doc.body.style.cssText = (
+ 'margin: 0px;' +
+ 'padding: 0px;' +
+ 'height: 100%;' +
+ 'width: 100%;' +
+ 'overflow: hidden;' +
+ 'cursor: var(--hterm-mouse-cursor-style);' +
+ '-webkit-user-select: none;' +
+ '-moz-user-select: none;');
+
+ const metaCharset = doc.createElement('meta');
+ metaCharset.setAttribute('charset', 'utf-8');
+ doc.head.appendChild(metaCharset);
+
+ if (this.DEBUG_) {
+ // When we're debugging we add padding to the body so that the offscreen
+ // elements are visible.
+ this.document_.body.style.paddingTop =
+ this.document_.body.style.paddingBottom =
+ 'calc(var(--hterm-charsize-height) * 3)';
+ }
+
+ var style = doc.createElement('style');
+
+ // Hide rows that are above or below the x-fold elements. This is necessary to
+ // ensure that these rows aren't visible to a screen reader. First hide all
+ // rows that are children of the <x-screen>. Then display the nodes that are
+ // after the top fold. Then rehide nodes that are after the bottom fold.
+ style.textContent = `
+ x-row {
+ display: block;
+ height: var(--hterm-charsize-height);
+ line-height: var(--hterm-charsize-height);
+ }
+
+ x-screen x-row {
+ visibility: hidden;
+ }
+
+ #hterm\\:top-fold-for-row-selection ~ x-row {
+ visibility: visible;
+ }
+
+ #hterm\\:bottom-fold-for-row-selection ~ x-row {
+ visibility: hidden;
+ }`;
+ doc.head.appendChild(style);
+
+ this.userCssLink_ = doc.createElement('link');
+ this.userCssLink_.setAttribute('rel', 'stylesheet');
+
+ this.userCssText_ = doc.createElement('style');
+ doc.head.appendChild(this.userCssText_);
+
+ // TODO(rginda): Sorry, this 'screen_' isn't the same thing as hterm.Screen
+ // from screen.js. I need to pick a better name for one of them to avoid
+ // the collision.
+ // We make this field editable even though we don't actually allow anything
+ // to be edited here so that Chrome will do the right thing with virtual
+ // keyboards and IMEs. But make sure we turn off all the input helper logic
+ // that doesn't make sense here, and might inadvertently mung or save input.
+ // Some of these attributes are standard while others are browser specific,
+ // but should be safely ignored by other browsers.
+ this.screen_ = doc.createElement('x-screen');
+ this.screen_.setAttribute('contenteditable', 'true');
+ this.screen_.setAttribute('spellcheck', 'false');
+ this.screen_.setAttribute('autocomplete', 'off');
+ this.screen_.setAttribute('autocorrect', 'off');
+ this.screen_.setAttribute('autocapitalize', 'none');
+
+ // In some ways the terminal behaves like a text box but not in all ways. It
+ // is not editable in the same ways a text box is editable and the content we
+ // want to be read out by a screen reader does not always align with the edits
+ // (selection changes) that happen in the terminal window. Use the log role so
+ // that the screen reader doesn't treat it like a text box and announce all
+ // selection changes. The announcements that we want spoken are generated
+ // by a separate live region, which gives more control over what will be
+ // spoken.
+ this.screen_.setAttribute('role', 'log');
+ this.screen_.setAttribute('aria-live', 'off');
+ this.screen_.setAttribute('aria-roledescription', 'Terminal');
+
+ // Set aria-readonly to indicate to the screen reader that the text on the
+ // screen is not modifiable by the html cursor. It may be modifiable by
+ // sending input to the application running in the terminal, but this is
+ // orthogonal to the DOM's notion of modifiable.
+ this.screen_.setAttribute('aria-readonly', 'true');
+ this.screen_.setAttribute('tabindex', '-1');
+ this.screen_.style.cssText = (
+ 'caret-color: transparent;' +
+ 'display: block;' +
+ 'font-family: monospace;' +
+ 'font-size: 15px;' +
+ 'font-variant-ligatures: none;' +
+ 'height: 100%;' +
+ 'overflow-y: scroll; overflow-x: hidden;' +
+ 'white-space: pre;' +
+ 'width: 100%;' +
+ 'outline: none !important');
+
+ doc.body.appendChild(this.screen_);
+
+ this.screen_.addEventListener('scroll', this.onScroll_.bind(this));
+ this.screen_.addEventListener('wheel', this.onScrollWheel_.bind(this));
+ this.screen_.addEventListener('touchstart', this.onTouch_.bind(this));
+ this.screen_.addEventListener('touchmove', this.onTouch_.bind(this));
+ this.screen_.addEventListener('touchend', this.onTouch_.bind(this));
+ this.screen_.addEventListener('touchcancel', this.onTouch_.bind(this));
+ this.screen_.addEventListener('copy', this.onCopy_.bind(this));
+ this.screen_.addEventListener('paste', this.onPaste_.bind(this));
+ this.screen_.addEventListener('drop', this.onDragAndDrop_.bind(this));
+
+ doc.body.addEventListener('keydown', this.onBodyKeyDown_.bind(this));
+
+ // Add buttons to make accessible scrolling through terminal history work
+ // well. These are positioned off-screen until they are selected, at which
+ // point they are moved on-screen.
+ const scrollButtonHeight = 30;
+ const scrollButtonBorder = 1;
+ const scrollButtonTotalHeight = scrollButtonHeight + 2 * scrollButtonBorder;
+ const scrollButtonStyle = `right: 0px;
+ position:fixed;
+ z-index: 1;
+ text-align: center;
+ cursor: pointer;
+ height: ${scrollButtonHeight}px;
+ width: 110px;
+ line-height: ${scrollButtonHeight}px;
+ border-width: ${scrollButtonBorder}px;
+ border-style: solid;
+ font-weight: bold;`;
+ // Note: we use a <div> rather than a <button> because we don't want it to be
+ // focusable. If it's focusable this interferes with the contenteditable
+ // focus.
+ this.scrollUpButton_ = this.document_.createElement('div');
+ this.scrollUpButton_.id = 'hterm:a11y:page-up';
+ this.scrollUpButton_.innerText = hterm.msg('BUTTON_PAGE_UP', [], 'Page up');
+ this.scrollUpButton_.setAttribute('role', 'button');
+ this.scrollUpButton_.style.cssText = scrollButtonStyle;
+ this.scrollUpButton_.style.top = -scrollButtonTotalHeight + 'px';
+ this.scrollUpButton_.addEventListener('click', this.scrollPageUp.bind(this));
+
+ this.scrollDownButton_ = this.document_.createElement('div');
+ this.scrollDownButton_.id = 'hterm:a11y:page-down';
+ this.scrollDownButton_.innerText =
+ hterm.msg('BUTTON_PAGE_DOWN', [], 'Page down');
+ this.scrollDownButton_.setAttribute('role', 'button');
+ this.scrollDownButton_.style.cssText = scrollButtonStyle;
+ this.scrollDownButton_.style.bottom = -scrollButtonTotalHeight + 'px';
+ this.scrollDownButton_.addEventListener(
+ 'click', this.scrollPageDown.bind(this));
+
+ // We only allow the scroll buttons to display after a delay, otherwise the
+ // page up button can flash onto the screen during the intial change in focus.
+ // This seems to be because it is the first element inside the <x-screen>
+ // element, which will get focussed on page load.
+ this.allowScrollButtonsToDisplay_ = false;
+ setTimeout(() => { this.allowScrollButtonsToDisplay_ = true; }, 500);
+ this.document_.addEventListener('selectionchange', () => {
+ this.selection.sync();
+
+ if (!this.allowScrollButtonsToDisplay_)
+ return;
+
+ const accessibilityEnabled = this.accessibilityReader_ &&
+ this.accessibilityReader_.accessibilityEnabled;
+
+ const selection = this.document_.getSelection();
+ let selectedElement;
+ if (selection.anchorNode && selection.anchorNode.parentElement) {
+ selectedElement = selection.anchorNode.parentElement;
+ }
+ if (accessibilityEnabled && selectedElement == this.scrollUpButton_) {
+ this.scrollUpButton_.style.top = '0px';
+ } else {
+ this.scrollUpButton_.style.top = -scrollButtonTotalHeight + 'px';
+ }
+ if (accessibilityEnabled && selectedElement == this.scrollDownButton_) {
+ this.scrollDownButton_.style.bottom = '0px';
+ } else {
+ this.scrollDownButton_.style.bottom = -scrollButtonTotalHeight + 'px';
+ }
+ });
+
+ this.screen_.appendChild(this.scrollUpButton_);
+
+ // This is the main container for the fixed rows.
+ this.rowNodes_ = doc.createElement('div');
+ this.rowNodes_.id = 'hterm:row-nodes';
+ this.rowNodes_.style.cssText = (
+ 'display: block;' +
+ 'position: fixed;' +
+ 'overflow: hidden;' +
+ '-webkit-user-select: text;' +
+ '-moz-user-select: text;');
+ this.screen_.appendChild(this.rowNodes_);
+
+ this.screen_.appendChild(this.scrollDownButton_);
+
+ // Two nodes to hold offscreen text during the copy event.
+ this.topSelectBag_ = doc.createElement('x-select-bag');
+ this.topSelectBag_.style.cssText = (
+ 'display: block;' +
+ 'overflow: hidden;' +
+ 'height: var(--hterm-charsize-height);' +
+ 'white-space: pre;');
+
+ this.bottomSelectBag_ = this.topSelectBag_.cloneNode();
+
+ // Nodes above the top fold and below the bottom fold are hidden. They are
+ // only used to hold rows that are part of the selection but are currently
+ // scrolled off the top or bottom of the visible range.
+ this.topFold_ = doc.createElement('x-fold');
+ this.topFold_.id = 'hterm:top-fold-for-row-selection';
+ this.topFold_.style.cssText = 'display: block;';
+ this.rowNodes_.appendChild(this.topFold_);
+
+ this.bottomFold_ = this.topFold_.cloneNode();
+ this.bottomFold_.id = 'hterm:bottom-fold-for-row-selection';
+ this.rowNodes_.appendChild(this.bottomFold_);
+
+ // This hidden div accounts for the vertical space that would be consumed by
+ // all the rows in the buffer if they were visible. It's what causes the
+ // scrollbar to appear on the 'x-screen', and it moves within the screen when
+ // the scrollbar is moved.
+ //
+ // It is set 'visibility: hidden' to keep the browser from trying to include
+ // it in the selection when a user 'drag selects' upwards (drag the mouse to
+ // select and scroll at the same time). Without this, the selection gets
+ // out of whack.
+ this.scrollArea_ = doc.createElement('div');
+ this.scrollArea_.id = 'hterm:scrollarea';
+ this.scrollArea_.style.cssText = 'visibility: hidden';
+ this.screen_.appendChild(this.scrollArea_);
+
+ // This svg element is used to detect when the browser is zoomed. It must be
+ // placed in the outermost document for currentScale to be correct.
+ // TODO(rginda): This means that hterm nested in an iframe will not correctly
+ // detect browser zoom level. We should come up with a better solution.
+ // Note: This must be http:// else Chrome cannot create the element correctly.
+ var xmlns = 'http://www.w3.org/2000/svg';
+ this.svg_ = this.div_.ownerDocument.createElementNS(xmlns, 'svg');
+ this.svg_.id = 'hterm:zoom-detector';
+ this.svg_.setAttribute('xmlns', xmlns);
+ this.svg_.setAttribute('version', '1.1');
+ this.svg_.style.cssText = (
+ 'position: absolute;' +
+ 'top: 0;' +
+ 'left: 0;' +
+ 'visibility: hidden');
+
+
+ // We send focus to this element just before a paste happens, so we can
+ // capture the pasted text and forward it on to someone who cares.
+ this.pasteTarget_ = doc.createElement('textarea');
+ this.pasteTarget_.id = 'hterm:ctrl-v-paste-target';
+ this.pasteTarget_.setAttribute('tabindex', '-1');
+ this.pasteTarget_.setAttribute('aria-hidden', 'true');
+ this.pasteTarget_.style.cssText = (
+ 'position: absolute;' +
+ 'height: 1px;' +
+ 'width: 1px;' +
+ 'left: 0px; ' +
+ 'bottom: 0px;' +
+ 'opacity: 0');
+ this.pasteTarget_.contentEditable = true;
+
+ this.screen_.appendChild(this.pasteTarget_);
+ this.pasteTarget_.addEventListener(
+ 'textInput', this.handlePasteTargetTextInput_.bind(this));
+
+ this.resize();
+};
+
+/**
+ * Set the AccessibilityReader object to use to announce page scroll updates.
+ *
+ * @param {hterm.AccessibilityReader} accessibilityReader for announcing page
+ * scroll updates.
+ */
+hterm.ScrollPort.prototype.setAccessibilityReader =
+ function(accessibilityReader) {
+ this.accessibilityReader_ = accessibilityReader;
+};
+
+/**
+ * Scroll the terminal one page up (minus one line) relative to the current
+ * position.
+ */
+hterm.ScrollPort.prototype.scrollPageUp = function() {
+ if (this.getTopRowIndex() == 0) {
+ return;
+ }
+
+ const i = this.getTopRowIndex();
+ this.scrollRowToTop(i - this.visibleRowCount + 1);
+
+ this.assertiveAnnounce_();
+};
+
+/**
+ * Scroll the terminal one page down (minus one line) relative to the current
+ * position.
+ */
+hterm.ScrollPort.prototype.scrollPageDown = function() {
+ if (this.isScrolledEnd) {
+ return;
+ }
+
+ const i = this.getTopRowIndex();
+ this.scrollRowToTop(i + this.visibleRowCount - 1);
+
+ this.assertiveAnnounce_();
+};
+
+/**
+ * Select the font-family and font-smoothing for this scrollport.
+ *
+ * @param {string} fontFamily Value of the CSS 'font-family' to use for this
+ * scrollport. Should be a monospace font.
+ * @param {string} opt_smoothing Optional value for '-webkit-font-smoothing'.
+ * Defaults to an empty string if not specified.
+ */
+hterm.ScrollPort.prototype.setFontFamily = function(fontFamily, opt_smoothing) {
+ this.screen_.style.fontFamily = fontFamily;
+ if (opt_smoothing) {
+ this.screen_.style.webkitFontSmoothing = opt_smoothing;
+ } else {
+ this.screen_.style.webkitFontSmoothing = '';
+ }
+
+ this.syncCharacterSize();
+};
+
+hterm.ScrollPort.prototype.getFontFamily = function() {
+ return this.screen_.style.fontFamily;
+};
+
+/**
+ * Set a custom stylesheet to include in the scrollport.
+ *
+ * Defaults to null, meaning no custom css is loaded. Set it back to null or
+ * the empty string to remove a previously applied custom css.
+ */
+hterm.ScrollPort.prototype.setUserCssUrl = function(url) {
+ if (url) {
+ this.userCssLink_.setAttribute('href', url);
+
+ if (!this.userCssLink_.parentNode)
+ this.document_.head.appendChild(this.userCssLink_);
+ } else if (this.userCssLink_.parentNode) {
+ this.document_.head.removeChild(this.userCssLink_);
+ }
+};
+
+hterm.ScrollPort.prototype.setUserCssText = function(text) {
+ this.userCssText_.textContent = text;
+};
+
+hterm.ScrollPort.prototype.focus = function() {
+ this.iframe_.focus();
+ this.screen_.focus();
+ this.publish('focus');
+};
+
+hterm.ScrollPort.prototype.getForegroundColor = function() {
+ return this.screen_.style.color;
+};
+
+hterm.ScrollPort.prototype.setForegroundColor = function(color) {
+ this.screen_.style.color = color;
+ this.scrollUpButton_.style.backgroundColor = color;
+ this.scrollDownButton_.style.backgroundColor = color;
+};
+
+hterm.ScrollPort.prototype.getBackgroundColor = function() {
+ return this.screen_.style.backgroundColor;
+};
+
+hterm.ScrollPort.prototype.setBackgroundColor = function(color) {
+ this.screen_.style.backgroundColor = color;
+ this.scrollUpButton_.style.color = color;
+ this.scrollDownButton_.style.color = color;
+};
+
+hterm.ScrollPort.prototype.setBackgroundImage = function(image) {
+ this.screen_.style.backgroundImage = image;
+};
+
+hterm.ScrollPort.prototype.setBackgroundSize = function(size) {
+ this.screen_.style.backgroundSize = size;
+};
+
+hterm.ScrollPort.prototype.setBackgroundPosition = function(position) {
+ this.screen_.style.backgroundPosition = position;
+};
+
+hterm.ScrollPort.prototype.setCtrlVPaste = function(ctrlVPaste) {
+ this.ctrlVPaste = ctrlVPaste;
+};
+
+hterm.ScrollPort.prototype.setPasteOnDrop = function(pasteOnDrop) {
+ this.pasteOnDrop = pasteOnDrop;
+};
+
+/**
+ * Get the usable size of the scrollport screen.
+ *
+ * The width will not include the scrollbar width.
+ */
+hterm.ScrollPort.prototype.getScreenSize = function() {
+ var size = hterm.getClientSize(this.screen_);
+ return {
+ height: size.height,
+ width: size.width - this.currentScrollbarWidthPx
+ };
+};
+
+/**
+ * Get the usable width of the scrollport screen.
+ *
+ * This the widget width minus scrollbar width.
+ */
+hterm.ScrollPort.prototype.getScreenWidth = function() {
+ return this.getScreenSize().width ;
+};
+
+/**
+ * Get the usable height of the scrollport screen.
+ */
+hterm.ScrollPort.prototype.getScreenHeight = function() {
+ return this.getScreenSize().height;
+};
+
+/**
+ * Return the document that holds the visible rows of this hterm.ScrollPort.
+ */
+hterm.ScrollPort.prototype.getDocument = function() {
+ return this.document_;
+};
+
+/**
+ * Returns the x-screen element that holds the rows of this hterm.ScrollPort.
+ */
+hterm.ScrollPort.prototype.getScreenNode = function() {
+ return this.screen_;
+};
+
+/**
+ * Clear out any cached rowNodes.
+ */
+hterm.ScrollPort.prototype.resetCache = function() {
+ this.currentRowNodeCache_ = null;
+ this.previousRowNodeCache_ = {};
+};
+
+/**
+ * Change the current rowProvider.
+ *
+ * This will clear the row cache and cause a redraw.
+ *
+ * @param {Object} rowProvider An object capable of providing the rows
+ * in this hterm.ScrollPort.
+ */
+hterm.ScrollPort.prototype.setRowProvider = function(rowProvider) {
+ this.resetCache();
+ this.rowProvider_ = rowProvider;
+ this.scheduleRedraw();
+};
+
+/**
+ * Inform the ScrollPort that the root DOM nodes for some or all of the visible
+ * rows are no longer valid.
+ *
+ * Specifically, this should be called if this.rowProvider_.getRowNode() now
+ * returns an entirely different node than it did before. It does not
+ * need to be called if the content of a row node is the only thing that
+ * changed.
+ *
+ * This skips some of the overhead of a full redraw, but should not be used
+ * in cases where the scrollport has been scrolled, or when the row count has
+ * changed.
+ */
+hterm.ScrollPort.prototype.invalidate = function() {
+ var node = this.topFold_.nextSibling;
+ while (node != this.bottomFold_) {
+ var nextSibling = node.nextSibling;
+ node.parentElement.removeChild(node);
+ node = nextSibling;
+ }
+
+ this.previousRowNodeCache_ = null;
+ var topRowIndex = this.getTopRowIndex();
+ var bottomRowIndex = this.getBottomRowIndex(topRowIndex);
+
+ this.drawVisibleRows_(topRowIndex, bottomRowIndex);
+};
+
+hterm.ScrollPort.prototype.scheduleInvalidate = function() {
+ if (this.timeouts_.invalidate)
+ return;
+
+ var self = this;
+ this.timeouts_.invalidate = setTimeout(function () {
+ delete self.timeouts_.invalidate;
+ self.invalidate();
+ }, 0);
+};
+
+/**
+ * Set the font size of the ScrollPort.
+ */
+hterm.ScrollPort.prototype.setFontSize = function(px) {
+ this.screen_.style.fontSize = px + 'px';
+ this.syncCharacterSize();
+};
+
+/**
+ * Return the current font size of the ScrollPort.
+ */
+hterm.ScrollPort.prototype.getFontSize = function() {
+ return parseInt(this.screen_.style.fontSize);
+};
+
+/**
+ * Measure the size of a single character in pixels.
+ *
+ * @param {string} opt_weight The font weight to measure, or 'normal' if
+ * omitted.
+ * @return {hterm.Size} A new hterm.Size object.
+ */
+hterm.ScrollPort.prototype.measureCharacterSize = function(opt_weight) {
+ // Number of lines used to average the height of a single character.
+ var numberOfLines = 100;
+ // Number of chars per line used to average the width of a single character.
+ var lineLength = 100;
+
+ if (!this.ruler_) {
+ this.ruler_ = this.document_.createElement('div');
+ this.ruler_.id = 'hterm:ruler-character-size';
+ this.ruler_.style.cssText = (
+ 'position: absolute;' +
+ 'top: 0;' +
+ 'left: 0;' +
+ 'visibility: hidden;' +
+ 'height: auto !important;' +
+ 'width: auto !important;');
+
+ // We need to put the text in a span to make the size calculation
+ // work properly in Firefox
+ this.rulerSpan_ = this.document_.createElement('span');
+ this.rulerSpan_.id = 'hterm:ruler-span-workaround';
+ this.rulerSpan_.innerHTML =
+ ('X'.repeat(lineLength) + '\r').repeat(numberOfLines);
+ this.ruler_.appendChild(this.rulerSpan_);
+
+ this.rulerBaseline_ = this.document_.createElement('span');
+ this.rulerSpan_.id = 'hterm:ruler-baseline';
+ // We want to collapse it on the baseline
+ this.rulerBaseline_.style.fontSize = '0px';
+ this.rulerBaseline_.textContent = 'X';
+ }
+
+ this.rulerSpan_.style.fontWeight = opt_weight || '';
+
+ this.rowNodes_.appendChild(this.ruler_);
+ var rulerSize = hterm.getClientSize(this.rulerSpan_);
+
+ var size = new hterm.Size(rulerSize.width / lineLength,
+ rulerSize.height / numberOfLines);
+
+ this.ruler_.appendChild(this.rulerBaseline_);
+ size.baseline = this.rulerBaseline_.offsetTop;
+ this.ruler_.removeChild(this.rulerBaseline_);
+
+ this.rowNodes_.removeChild(this.ruler_);
+
+ this.div_.ownerDocument.body.appendChild(this.svg_);
+ size.zoomFactor = this.svg_.currentScale;
+ this.div_.ownerDocument.body.removeChild(this.svg_);
+
+ return size;
+};
+
+/**
+ * Synchronize the character size.
+ *
+ * This will re-measure the current character size and adjust the height
+ * of an x-row to match.
+ */
+hterm.ScrollPort.prototype.syncCharacterSize = function() {
+ this.characterSize = this.measureCharacterSize();
+
+ this.resize();
+};
+
+/**
+ * Reset dimensions and visible row count to account for a change in the
+ * dimensions of the 'x-screen'.
+ */
+hterm.ScrollPort.prototype.resize = function() {
+ this.currentScrollbarWidthPx = hterm.getClientWidth(this.screen_) -
+ this.screen_.clientWidth;
+
+ this.syncScrollHeight();
+ this.syncRowNodesDimensions_();
+
+ var self = this;
+ this.publish(
+ 'resize', { scrollPort: this },
+ function() {
+ self.scrollRowToBottom(self.rowProvider_.getRowCount());
+ self.scheduleRedraw();
+ });
+};
+
+/**
+ * Announce text content on the current screen for the screen reader.
+ */
+hterm.ScrollPort.prototype.assertiveAnnounce_ = function() {
+ if (!this.accessibilityReader_) {
+ return;
+ }
+
+ const topRow = this.getTopRowIndex();
+ const bottomRow = this.getBottomRowIndex(topRow);
+
+ let percentScrolled = 100 * topRow /
+ Math.max(1, this.rowProvider_.getRowCount() - this.visibleRowCount);
+ percentScrolled = Math.min(100, Math.round(percentScrolled));
+ let currentScreenContent = hterm.msg('ANNOUNCE_CURRENT_SCREEN_HEADER',
+ [percentScrolled],
+ '$1% scrolled,');
+ currentScreenContent += '\n';
+
+ for (let i = topRow; i <= bottomRow; ++i) {
+ const node = this.fetchRowNode_(i);
+ currentScreenContent += node.textContent + '\n';
+ }
+
+ this.accessibilityReader_.assertiveAnnounce(currentScreenContent);
+};
+
+/**
+ * Set the position and size of the row nodes element.
+ */
+hterm.ScrollPort.prototype.syncRowNodesDimensions_ = function() {
+ var screenSize = this.getScreenSize();
+
+ this.lastScreenWidth_ = screenSize.width;
+ this.lastScreenHeight_ = screenSize.height;
+
+ // We don't want to show a partial row because it would be distracting
+ // in a terminal, so we floor any fractional row count.
+ this.visibleRowCount = lib.f.smartFloorDivide(
+ screenSize.height, this.characterSize.height);
+
+ // Then compute the height of our integral number of rows.
+ var visibleRowsHeight = this.visibleRowCount * this.characterSize.height;
+
+ // Then the difference between the screen height and total row height needs to
+ // be made up for as top margin. We need to record this value so it
+ // can be used later to determine the topRowIndex.
+ this.visibleRowTopMargin = 0;
+ this.visibleRowBottomMargin = screenSize.height - visibleRowsHeight;
+
+ this.topFold_.style.marginBottom = this.visibleRowTopMargin + 'px';
+
+
+ var topFoldOffset = 0;
+ var node = this.topFold_.previousSibling;
+ while (node) {
+ topFoldOffset += hterm.getClientHeight(node);
+ node = node.previousSibling;
+ }
+
+ // Set the dimensions of the visible rows container.
+ this.rowNodes_.style.width = screenSize.width + 'px';
+ this.rowNodes_.style.height = visibleRowsHeight + topFoldOffset + 'px';
+ this.rowNodes_.style.left = this.screen_.offsetLeft + 'px';
+ this.rowNodes_.style.top = this.screen_.offsetTop - topFoldOffset + 'px';
+};
+
+hterm.ScrollPort.prototype.syncScrollHeight = function() {
+ // Resize the scroll area to appear as though it contains every row.
+ this.lastRowCount_ = this.rowProvider_.getRowCount();
+ this.scrollArea_.style.height = (this.characterSize.height *
+ this.lastRowCount_ +
+ this.visibleRowTopMargin +
+ this.visibleRowBottomMargin +
+ 'px');
+};
+
+/**
+ * Schedule a redraw to happen asynchronously.
+ *
+ * If this method is called multiple times before the redraw has a chance to
+ * run only one redraw occurs.
+ */
+hterm.ScrollPort.prototype.scheduleRedraw = function() {
+ if (this.timeouts_.redraw)
+ return;
+
+ var self = this;
+ this.timeouts_.redraw = setTimeout(function () {
+ delete self.timeouts_.redraw;
+ self.redraw_();
+ }, 0);
+};
+
+/**
+ * Update the state of scroll up/down buttons.
+ *
+ * If the viewport is at the top or bottom row of output, these buttons will
+ * be made transparent and clicking them shouldn't scroll any further.
+ */
+hterm.ScrollPort.prototype.updateScrollButtonState_ = function() {
+ const setButton = (button, disabled) => {
+ button.setAttribute('aria-disabled', disabled ? 'true' : 'false');
+ button.style.opacity = disabled ? 0.5 : 1;
+ };
+ setButton(this.scrollUpButton_, this.getTopRowIndex() == 0);
+ setButton(this.scrollDownButton_, this.isScrolledEnd);
+};
+
+/**
+ * Redraw the current hterm.ScrollPort based on the current scrollbar position.
+ *
+ * When redrawing, we are careful to make sure that the rows that start or end
+ * the current selection are not touched in any way. Doing so would disturb
+ * the selection, and cleaning up after that would cause flashes at best and
+ * incorrect selection at worst. Instead, we modify the DOM around these nodes.
+ * We even stash the selection start/end outside of the visible area if
+ * they are not supposed to be visible in the hterm.ScrollPort.
+ */
+hterm.ScrollPort.prototype.redraw_ = function() {
+ this.resetSelectBags_();
+ this.selection.sync();
+
+ this.syncScrollHeight();
+
+ this.currentRowNodeCache_ = {};
+
+ var topRowIndex = this.getTopRowIndex();
+ var bottomRowIndex = this.getBottomRowIndex(topRowIndex);
+
+ this.drawTopFold_(topRowIndex);
+ this.drawBottomFold_(bottomRowIndex);
+ this.drawVisibleRows_(topRowIndex, bottomRowIndex);
+
+ this.syncRowNodesDimensions_();
+
+ this.previousRowNodeCache_ = this.currentRowNodeCache_;
+ this.currentRowNodeCache_ = null;
+
+ this.isScrolledEnd = (
+ this.getTopRowIndex() + this.visibleRowCount >= this.lastRowCount_);
+
+ this.updateScrollButtonState_();
+};
+
+/**
+ * Ensure that the nodes above the top fold are as they should be.
+ *
+ * If the selection start and/or end nodes are above the visible range
+ * of this hterm.ScrollPort then the dom will be adjusted so that they appear
+ * before the top fold (the first x-fold element, aka this.topFold).
+ *
+ * If not, the top fold will be the first element.
+ *
+ * It is critical that this method does not move the selection nodes. Doing
+ * so would clear the current selection. Instead, the rest of the DOM is
+ * adjusted around them.
+ */
+hterm.ScrollPort.prototype.drawTopFold_ = function(topRowIndex) {
+ if (!this.selection.startRow ||
+ this.selection.startRow.rowIndex >= topRowIndex) {
+ // Selection is entirely below the top fold, just make sure the fold is
+ // the first child.
+ if (this.rowNodes_.firstChild != this.topFold_)
+ this.rowNodes_.insertBefore(this.topFold_, this.rowNodes_.firstChild);
+
+ return;
+ }
+
+ if (!this.selection.isMultiline ||
+ this.selection.endRow.rowIndex >= topRowIndex) {
+ // Only the startRow is above the fold.
+ if (this.selection.startRow.nextSibling != this.topFold_)
+ this.rowNodes_.insertBefore(this.topFold_,
+ this.selection.startRow.nextSibling);
+ } else {
+ // Both rows are above the fold.
+ if (this.selection.endRow.nextSibling != this.topFold_) {
+ this.rowNodes_.insertBefore(this.topFold_,
+ this.selection.endRow.nextSibling);
+ }
+
+ // Trim any intermediate lines.
+ while (this.selection.startRow.nextSibling !=
+ this.selection.endRow) {
+ this.rowNodes_.removeChild(this.selection.startRow.nextSibling);
+ }
+ }
+
+ while(this.rowNodes_.firstChild != this.selection.startRow) {
+ this.rowNodes_.removeChild(this.rowNodes_.firstChild);
+ }
+};
+
+/**
+ * Ensure that the nodes below the bottom fold are as they should be.
+ *
+ * If the selection start and/or end nodes are below the visible range
+ * of this hterm.ScrollPort then the dom will be adjusted so that they appear
+ * after the bottom fold (the second x-fold element, aka this.bottomFold).
+ *
+ * If not, the bottom fold will be the last element.
+ *
+ * It is critical that this method does not move the selection nodes. Doing
+ * so would clear the current selection. Instead, the rest of the DOM is
+ * adjusted around them.
+ */
+hterm.ScrollPort.prototype.drawBottomFold_ = function(bottomRowIndex) {
+ if (!this.selection.endRow ||
+ this.selection.endRow.rowIndex <= bottomRowIndex) {
+ // Selection is entirely above the bottom fold, just make sure the fold is
+ // the last child.
+ if (this.rowNodes_.lastChild != this.bottomFold_)
+ this.rowNodes_.appendChild(this.bottomFold_);
+
+ return;
+ }
+
+ if (!this.selection.isMultiline ||
+ this.selection.startRow.rowIndex <= bottomRowIndex) {
+ // Only the endRow is below the fold.
+ if (this.bottomFold_.nextSibling != this.selection.endRow)
+ this.rowNodes_.insertBefore(this.bottomFold_,
+ this.selection.endRow);
+ } else {
+ // Both rows are below the fold.
+ if (this.bottomFold_.nextSibling != this.selection.startRow) {
+ this.rowNodes_.insertBefore(this.bottomFold_,
+ this.selection.startRow);
+ }
+
+ // Trim any intermediate lines.
+ while (this.selection.startRow.nextSibling !=
+ this.selection.endRow) {
+ this.rowNodes_.removeChild(this.selection.startRow.nextSibling);
+ }
+ }
+
+ while(this.rowNodes_.lastChild != this.selection.endRow) {
+ this.rowNodes_.removeChild(this.rowNodes_.lastChild);
+ }
+};
+
+/**
+ * Ensure that the rows between the top and bottom folds are as they should be.
+ *
+ * This method assumes that drawTopFold_() and drawBottomFold_() have already
+ * run, and that they have left any visible selection row (selection start
+ * or selection end) between the folds.
+ *
+ * It recycles DOM nodes from the previous redraw where possible, but will ask
+ * the rowSource to make new nodes if necessary.
+ *
+ * It is critical that this method does not move the selection nodes. Doing
+ * so would clear the current selection. Instead, the rest of the DOM is
+ * adjusted around them.
+ */
+hterm.ScrollPort.prototype.drawVisibleRows_ = function(
+ topRowIndex, bottomRowIndex) {
+ var self = this;
+
+ // Keep removing nodes, starting with currentNode, until we encounter
+ // targetNode. Throws on failure.
+ function removeUntilNode(currentNode, targetNode) {
+ while (currentNode != targetNode) {
+ if (!currentNode)
+ throw 'Did not encounter target node';
+
+ if (currentNode == self.bottomFold_)
+ throw 'Encountered bottom fold before target node';
+
+ var deadNode = currentNode;
+ currentNode = currentNode.nextSibling;
+ deadNode.parentNode.removeChild(deadNode);
+ }
+ }
+
+ // Shorthand for things we're going to use a lot.
+ var selectionStartRow = this.selection.startRow;
+ var selectionEndRow = this.selection.endRow;
+ var bottomFold = this.bottomFold_;
+
+ // The node we're examining during the current iteration.
+ var node = this.topFold_.nextSibling;
+
+ var targetDrawCount = Math.min(this.visibleRowCount,
+ this.rowProvider_.getRowCount());
+
+ for (var drawCount = 0; drawCount < targetDrawCount; drawCount++) {
+ var rowIndex = topRowIndex + drawCount;
+
+ if (node == bottomFold) {
+ // We've hit the bottom fold, we need to insert a new row.
+ var newNode = this.fetchRowNode_(rowIndex);
+ if (!newNode) {
+ console.log("Couldn't fetch row index: " + rowIndex);
+ break;
+ }
+
+ this.rowNodes_.insertBefore(newNode, node);
+ continue;
+ }
+
+ if (node.rowIndex == rowIndex) {
+ // This node is in the right place, move along.
+ node = node.nextSibling;
+ continue;
+ }
+
+ if (selectionStartRow && selectionStartRow.rowIndex == rowIndex) {
+ // The selection start row is supposed to be here, remove nodes until
+ // we find it.
+ removeUntilNode(node, selectionStartRow);
+ node = selectionStartRow.nextSibling;
+ continue;
+ }
+
+ if (selectionEndRow && selectionEndRow.rowIndex == rowIndex) {
+ // The selection end row is supposed to be here, remove nodes until
+ // we find it.
+ removeUntilNode(node, selectionEndRow);
+ node = selectionEndRow.nextSibling;
+ continue;
+ }
+
+ if (node == selectionStartRow || node == selectionEndRow) {
+ // We encountered the start/end of the selection, but we don't want it
+ // yet. Insert a new row instead.
+ var newNode = this.fetchRowNode_(rowIndex);
+ if (!newNode) {
+ console.log("Couldn't fetch row index: " + rowIndex);
+ break;
+ }
+
+ this.rowNodes_.insertBefore(newNode, node);
+ continue;
+ }
+
+ // There is nothing special about this node, but it's in our way. Replace
+ // it with the node that should be here.
+ var newNode = this.fetchRowNode_(rowIndex);
+ if (!newNode) {
+ console.log("Couldn't fetch row index: " + rowIndex);
+ break;
+ }
+
+ if (node == newNode) {
+ node = node.nextSibling;
+ continue;
+ }
+
+ this.rowNodes_.insertBefore(newNode, node);
+ if (!newNode.nextSibling)
+ debugger;
+ this.rowNodes_.removeChild(node);
+ node = newNode.nextSibling;
+ }
+
+ if (node != this.bottomFold_)
+ removeUntilNode(node, bottomFold);
+};
+
+/**
+ * Empty out both select bags and remove them from the document.
+ *
+ * These nodes hold the text between the start and end of the selection
+ * when that text is otherwise off screen. They are filled out in the
+ * onCopy_ event.
+ */
+hterm.ScrollPort.prototype.resetSelectBags_ = function() {
+ if (this.topSelectBag_.parentNode) {
+ this.topSelectBag_.textContent = '';
+ this.topSelectBag_.parentNode.removeChild(this.topSelectBag_);
+ }
+
+ if (this.bottomSelectBag_.parentNode) {
+ this.bottomSelectBag_.textContent = '';
+ this.bottomSelectBag_.parentNode.removeChild(this.bottomSelectBag_);
+ }
+};
+
+/**
+ * Place a row node in the cache of visible nodes.
+ *
+ * This method may only be used during a redraw_.
+ */
+hterm.ScrollPort.prototype.cacheRowNode_ = function(rowNode) {
+ this.currentRowNodeCache_[rowNode.rowIndex] = rowNode;
+};
+
+/**
+ * Fetch the row node for the given index.
+ *
+ * This will return a node from the cache if possible, or will request one
+ * from the RowProvider if not.
+ *
+ * If a redraw_ is in progress the row will be added to the current cache.
+ */
+hterm.ScrollPort.prototype.fetchRowNode_ = function(rowIndex) {
+ var node;
+
+ if (this.previousRowNodeCache_ && rowIndex in this.previousRowNodeCache_) {
+ node = this.previousRowNodeCache_[rowIndex];
+ } else {
+ node = this.rowProvider_.getRowNode(rowIndex);
+ }
+
+ if (this.currentRowNodeCache_)
+ this.cacheRowNode_(node);
+
+ return node;
+};
+
+/**
+ * Select all rows in the viewport.
+ */
+hterm.ScrollPort.prototype.selectAll = function() {
+ var firstRow;
+
+ if (this.topFold_.nextSibling.rowIndex != 0) {
+ while (this.topFold_.previousSibling) {
+ this.rowNodes_.removeChild(this.topFold_.previousSibling);
+ }
+
+ firstRow = this.fetchRowNode_(0);
+ this.rowNodes_.insertBefore(firstRow, this.topFold_);
+ this.syncRowNodesDimensions_();
+ } else {
+ firstRow = this.topFold_.nextSibling;
+ }
+
+ var lastRowIndex = this.rowProvider_.getRowCount() - 1;
+ var lastRow;
+
+ if (this.bottomFold_.previousSibling.rowIndex != lastRowIndex) {
+ while (this.bottomFold_.nextSibling) {
+ this.rowNodes_.removeChild(this.bottomFold_.nextSibling);
+ }
+
+ lastRow = this.fetchRowNode_(lastRowIndex);
+ this.rowNodes_.appendChild(lastRow);
+ } else {
+ lastRow = this.bottomFold_.previousSibling.rowIndex;
+ }
+
+ var selection = this.document_.getSelection();
+ selection.collapse(firstRow, 0);
+ selection.extend(lastRow, lastRow.childNodes.length);
+
+ this.selection.sync();
+};
+
+/**
+ * Return the maximum scroll position in pixels.
+ */
+hterm.ScrollPort.prototype.getScrollMax_ = function(e) {
+ return (hterm.getClientHeight(this.scrollArea_) +
+ this.visibleRowTopMargin + this.visibleRowBottomMargin -
+ hterm.getClientHeight(this.screen_));
+};
+
+/**
+ * Scroll the given rowIndex to the top of the hterm.ScrollPort.
+ *
+ * @param {integer} rowIndex Index of the target row.
+ */
+hterm.ScrollPort.prototype.scrollRowToTop = function(rowIndex) {
+ this.syncScrollHeight();
+
+ this.isScrolledEnd = (
+ rowIndex + this.visibleRowCount >= this.lastRowCount_);
+
+ var scrollTop = rowIndex * this.characterSize.height +
+ this.visibleRowTopMargin;
+
+ var scrollMax = this.getScrollMax_();
+ if (scrollTop > scrollMax)
+ scrollTop = scrollMax;
+
+ if (this.screen_.scrollTop == scrollTop)
+ return;
+
+ this.screen_.scrollTop = scrollTop;
+ this.scheduleRedraw();
+};
+
+/**
+ * Scroll the given rowIndex to the bottom of the hterm.ScrollPort.
+ *
+ * @param {integer} rowIndex Index of the target row.
+ */
+hterm.ScrollPort.prototype.scrollRowToBottom = function(rowIndex) {
+ this.syncScrollHeight();
+
+ this.isScrolledEnd = (
+ rowIndex + this.visibleRowCount >= this.lastRowCount_);
+
+ var scrollTop = rowIndex * this.characterSize.height +
+ this.visibleRowTopMargin + this.visibleRowBottomMargin;
+ scrollTop -= this.visibleRowCount * this.characterSize.height;
+
+ if (scrollTop < 0)
+ scrollTop = 0;
+
+ if (this.screen_.scrollTop == scrollTop)
+ return;
+
+ this.screen_.scrollTop = scrollTop;
+};
+
+/**
+ * Return the row index of the first visible row.
+ *
+ * This is based on the scroll position. If a redraw_ is in progress this
+ * returns the row that *should* be at the top.
+ */
+hterm.ScrollPort.prototype.getTopRowIndex = function() {
+ return Math.round(this.screen_.scrollTop / this.characterSize.height);
+};
+
+/**
+ * Return the row index of the last visible row.
+ *
+ * This is based on the scroll position. If a redraw_ is in progress this
+ * returns the row that *should* be at the bottom.
+ */
+hterm.ScrollPort.prototype.getBottomRowIndex = function(topRowIndex) {
+ return topRowIndex + this.visibleRowCount - 1;
+};
+
+/**
+ * Handler for scroll events.
+ *
+ * The onScroll event fires when scrollArea's scrollTop property changes. This
+ * may be due to the user manually move the scrollbar, or a programmatic change.
+ */
+hterm.ScrollPort.prototype.onScroll_ = function(e) {
+ var screenSize = this.getScreenSize();
+ if (screenSize.width != this.lastScreenWidth_ ||
+ screenSize.height != this.lastScreenHeight_) {
+ // This event may also fire during a resize (but before the resize event!).
+ // This happens when the browser moves the scrollbar as part of the resize.
+ // In these cases, we want to ignore the scroll event and let onResize
+ // handle things. If we don't, then we end up scrolling to the wrong
+ // position after a resize.
+ this.resize();
+ return;
+ }
+
+ this.redraw_();
+ this.publish('scroll', { scrollPort: this });
+};
+
+/**
+ * Clients can override this if they want to hear scrollwheel events.
+ *
+ * Clients may call event.preventDefault() if they want to keep the scrollport
+ * from also handling the events.
+ */
+hterm.ScrollPort.prototype.onScrollWheel = function(e) {};
+
+/**
+ * Handler for scroll-wheel events.
+ *
+ * The onScrollWheel event fires when the user moves their scrollwheel over this
+ * hterm.ScrollPort. Because the frontmost element in the hterm.ScrollPort is
+ * a fixed position DIV, the scroll wheel does nothing by default. Instead, we
+ * have to handle it manually.
+ */
+hterm.ScrollPort.prototype.onScrollWheel_ = function(e) {
+ this.onScrollWheel(e);
+
+ if (e.defaultPrevented)
+ return;
+
+ // Figure out how far this event wants us to scroll.
+ const delta = this.scrollWheelDelta(e);
+
+ let top = this.screen_.scrollTop - delta.y;
+ if (top < 0)
+ top = 0;
+
+ var scrollMax = this.getScrollMax_();
+ if (top > scrollMax)
+ top = scrollMax;
+
+ if (top != this.screen_.scrollTop) {
+ // Moving scrollTop causes a scroll event, which triggers the redraw.
+ this.screen_.scrollTop = top;
+
+ // Only preventDefault when we've actually scrolled. If there's nothing
+ // to scroll we want to pass the event through so Chrome can detect the
+ // overscroll.
+ e.preventDefault();
+ }
+};
+
+/**
+ * Calculate how far a wheel event should scroll.
+ *
+ * This normalizes the browser's concept of a scroll (pixels, lines, etc...)
+ * into a standard pixel distance.
+ *
+ * @param {WheelEvent} e The mouse wheel event to process.
+ * @return {Object} The x & y of how far (in pixels) to scroll.
+ */
+hterm.ScrollPort.prototype.scrollWheelDelta = function(e) {
+ const delta = {x: 0, y: 0};
+
+ switch (e.deltaMode) {
+ case WheelEvent.DOM_DELTA_PIXEL:
+ delta.x = e.deltaX * this.scrollWheelMultiplier_;
+ delta.y = e.deltaY * this.scrollWheelMultiplier_;
+ break;
+ case WheelEvent.DOM_DELTA_LINE:
+ delta.x = e.deltaX * this.characterSize.width;
+ delta.y = e.deltaY * this.characterSize.height;
+ break;
+ case WheelEvent.DOM_DELTA_PAGE:
+ delta.x = e.deltaX * this.characterSize.width * this.screen_.getWidth();
+ delta.y = e.deltaY * this.characterSize.height * this.screen_.getHeight();
+ break;
+ }
+
+ // The Y sign is inverted from what we would expect: up/down are
+ // negative/positive respectively. The X sign is sane though: left/right
+ // are negative/positive respectively.
+ delta.y *= -1;
+
+ return delta;
+};
+
+
+/**
+ * Clients can override this if they want to hear touch events.
+ *
+ * Clients may call event.preventDefault() if they want to keep the scrollport
+ * from also handling the events.
+ */
+hterm.ScrollPort.prototype.onTouch = function(e) {};
+
+/**
+ * Handler for touch events.
+ */
+hterm.ScrollPort.prototype.onTouch_ = function(e) {
+ this.onTouch(e);
+
+ if (e.defaultPrevented)
+ return;
+
+ // Extract the fields from the Touch event that we need. If we saved the
+ // event directly, it has references to other objects (like x-row) that
+ // might stick around for a long time. This way we only have small objects
+ // in our lastTouch_ state.
+ var scrubTouch = function(t) {
+ return {
+ id: t.identifier,
+ y: t.clientY,
+ x: t.clientX,
+ };
+ };
+
+ var i, touch;
+ switch (e.type) {
+ case 'touchstart':
+ // Workaround focus bug on CrOS if possible.
+ // TODO(vapier): Drop this once https://crbug.com/919222 is fixed.
+ if (hterm.os == 'cros' && window.chrome && chrome.windows) {
+ chrome.windows.getCurrent((win) => {
+ if (!win.focused) {
+ chrome.windows.update(win.id, {focused: true});
+ }
+ });
+ }
+
+ // Save the current set of touches.
+ for (i = 0; i < e.changedTouches.length; ++i) {
+ touch = scrubTouch(e.changedTouches[i]);
+ this.lastTouch_[touch.id] = touch;
+ }
+ break;
+
+ case 'touchcancel':
+ case 'touchend':
+ // Throw away existing touches that we're finished with.
+ for (i = 0; i < e.changedTouches.length; ++i)
+ delete this.lastTouch_[e.changedTouches[i].identifier];
+ break;
+
+ case 'touchmove':
+ // Walk all of the touches in this one event and merge all of their
+ // changes into one delta. This lets multiple fingers scroll faster.
+ var delta = 0;
+ for (i = 0; i < e.changedTouches.length; ++i) {
+ touch = scrubTouch(e.changedTouches[i]);
+ delta += (this.lastTouch_[touch.id].y - touch.y);
+ this.lastTouch_[touch.id] = touch;
+ }
+
+ // Invert to match the touchscreen scrolling direction of browser windows.
+ delta *= -1;
+
+ var top = this.screen_.scrollTop - delta;
+ if (top < 0)
+ top = 0;
+
+ var scrollMax = this.getScrollMax_();
+ if (top > scrollMax)
+ top = scrollMax;
+
+ if (top != this.screen_.scrollTop) {
+ // Moving scrollTop causes a scroll event, which triggers the redraw.
+ this.screen_.scrollTop = top;
+ }
+ break;
+ }
+
+ // To disable gestures or anything else interfering with our scrolling.
+ e.preventDefault();
+};
+
+/**
+ * Handler for resize events.
+ *
+ * The browser will resize us such that the top row stays at the top, but we
+ * prefer to the bottom row to stay at the bottom.
+ */
+hterm.ScrollPort.prototype.onResize_ = function(e) {
+ // Re-measure, since onResize also happens for browser zoom changes.
+ this.syncCharacterSize();
+};
+
+/**
+ * Clients can override this if they want to hear copy events.
+ *
+ * Clients may call event.preventDefault() if they want to keep the scrollport
+ * from also handling the events.
+ */
+hterm.ScrollPort.prototype.onCopy = function(e) { };
+
+/**
+ * Handler for copy-to-clipboard events.
+ *
+ * If some or all of the selected rows are off screen we may need to fill in
+ * the rows between selection start and selection end. This handler determines
+ * if we're missing some of the selected text, and if so populates one or both
+ * of the "select bags" with the missing text.
+ */
+hterm.ScrollPort.prototype.onCopy_ = function(e) {
+ this.onCopy(e);
+
+ if (e.defaultPrevented)
+ return;
+
+ this.resetSelectBags_();
+ this.selection.sync();
+
+ if (this.selection.isCollapsed ||
+ this.selection.endRow.rowIndex - this.selection.startRow.rowIndex < 2) {
+ return;
+ }
+
+ var topRowIndex = this.getTopRowIndex();
+ var bottomRowIndex = this.getBottomRowIndex(topRowIndex);
+
+ if (this.selection.startRow.rowIndex < topRowIndex) {
+ // Start of selection is above the top fold.
+ var endBackfillIndex;
+
+ if (this.selection.endRow.rowIndex < topRowIndex) {
+ // Entire selection is above the top fold.
+ endBackfillIndex = this.selection.endRow.rowIndex;
+ } else {
+ // Selection extends below the top fold.
+ endBackfillIndex = this.topFold_.nextSibling.rowIndex;
+ }
+
+ this.topSelectBag_.textContent = this.rowProvider_.getRowsText(
+ this.selection.startRow.rowIndex + 1, endBackfillIndex);
+ this.rowNodes_.insertBefore(this.topSelectBag_,
+ this.selection.startRow.nextSibling);
+ this.syncRowNodesDimensions_();
+ }
+
+ if (this.selection.endRow.rowIndex > bottomRowIndex) {
+ // Selection ends below the bottom fold.
+ var startBackfillIndex;
+
+ if (this.selection.startRow.rowIndex > bottomRowIndex) {
+ // Entire selection is below the bottom fold.
+ startBackfillIndex = this.selection.startRow.rowIndex + 1;
+ } else {
+ // Selection starts above the bottom fold.
+ startBackfillIndex = this.bottomFold_.previousSibling.rowIndex + 1;
+ }
+
+ this.bottomSelectBag_.textContent = this.rowProvider_.getRowsText(
+ startBackfillIndex, this.selection.endRow.rowIndex);
+ this.rowNodes_.insertBefore(this.bottomSelectBag_, this.selection.endRow);
+ }
+};
+
+/**
+ * Focuses on the paste target on a ctrl-v keydown event, as in
+ * FF a content editable element must be focused before the paste event.
+ */
+hterm.ScrollPort.prototype.onBodyKeyDown_ = function(e) {
+ if (!this.ctrlVPaste)
+ return;
+
+ if ((e.ctrlKey || e.metaKey) && e.keyCode == 86 /* 'V' */)
+ this.pasteTarget_.focus();
+};
+
+/**
+ * Handle a paste event on the the ScrollPort's screen element.
+ *
+ * TODO: Handle ClipboardData.files transfers. https://crbug.com/433581.
+ */
+hterm.ScrollPort.prototype.onPaste_ = function(e) {
+ this.pasteTarget_.focus();
+
+ var self = this;
+ setTimeout(function() {
+ self.publish('paste', { text: self.pasteTarget_.value });
+ self.pasteTarget_.value = '';
+ self.focus();
+ }, 0);
+};
+
+/**
+ * Handles a textInput event on the paste target. Stops this from
+ * propagating as we want this to be handled in the onPaste_ method.
+ */
+hterm.ScrollPort.prototype.handlePasteTargetTextInput_ = function(e) {
+ e.stopPropagation();
+};
+
+/**
+ * Handle a drop event on the the ScrollPort's screen element.
+ *
+ * By default we try to copy in the structured format (HTML/whatever).
+ * The shift key can select plain text though.
+ *
+ * TODO: Handle DataTransfer.files transfers. https://crbug.com/433581.
+ *
+ * @param {DragEvent} e The drag event that fired us.
+ */
+hterm.ScrollPort.prototype.onDragAndDrop_ = function(e) {
+ if (!this.pasteOnDrop)
+ return;
+
+ e.preventDefault();
+
+ let data;
+ let format;
+
+ // If the shift key active, try to find a "rich" text source (but not plain
+ // text). e.g. text/html is OK.
+ if (e.shiftKey) {
+ e.dataTransfer.types.forEach((t) => {
+ if (!format && t != 'text/plain' && t.startsWith('text/'))
+ format = t;
+ });
+
+ // If we found a non-plain text source, try it out first.
+ if (format)
+ data = e.dataTransfer.getData(format);
+ }
+
+ // If we haven't loaded anything useful, fall back to plain text.
+ if (!data)
+ data = e.dataTransfer.getData('text/plain');
+
+ if (data)
+ this.publish('paste', {text: data});
+};
+
+/**
+ * Set the vertical scrollbar mode of the ScrollPort.
+ */
+hterm.ScrollPort.prototype.setScrollbarVisible = function(state) {
+ this.screen_.style.overflowY = state ? 'scroll' : 'hidden';
+};
+
+/**
+ * Set scroll wheel multiplier. This alters how much the screen scrolls on
+ * mouse wheel events.
+ */
+hterm.ScrollPort.prototype.setScrollWheelMoveMultipler = function(multiplier) {
+ this.scrollWheelMultiplier_ = multiplier;
+};
+// SOURCE FILE: hterm/js/hterm_terminal.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+lib.rtdep('lib.colors', 'lib.PreferenceManager', 'lib.resource', 'lib.wc',
+ 'lib.f', 'hterm.AccessibilityReader', 'hterm.Keyboard',
+ 'hterm.Options', 'hterm.PreferenceManager', 'hterm.Screen',
+ 'hterm.ScrollPort', 'hterm.Size', 'hterm.TextAttributes', 'hterm.VT');
+
+/**
+ * Constructor for the Terminal class.
+ *
+ * A Terminal pulls together the hterm.ScrollPort, hterm.Screen and hterm.VT100
+ * classes to provide the complete terminal functionality.
+ *
+ * There are a number of lower-level Terminal methods that can be called
+ * directly to manipulate the cursor, text, scroll region, and other terminal
+ * attributes. However, the primary method is interpret(), which parses VT
+ * escape sequences and invokes the appropriate Terminal methods.
+ *
+ * This class was heavily influenced by Cory Maccarrone's Framebuffer class.
+ *
+ * TODO(rginda): Eventually we're going to need to support characters which are
+ * displayed twice as wide as standard latin characters. This is to support
+ * CJK (and possibly other character sets).
+ *
+ * @param {string} opt_profileId Optional preference profile name. If not
+ * provided, defaults to 'default'.
+ */
+hterm.Terminal = function(opt_profileId) {
+ this.profileId_ = null;
+
+ // Two screen instances.
+ this.primaryScreen_ = new hterm.Screen();
+ this.alternateScreen_ = new hterm.Screen();
+
+ // The "current" screen.
+ this.screen_ = this.primaryScreen_;
+
+ // The local notion of the screen size. ScreenBuffers also have a size which
+ // indicates their present size. During size changes, the two may disagree.
+ // Also, the inactive screen's size is not altered until it is made the active
+ // screen.
+ this.screenSize = new hterm.Size(0, 0);
+
+ // The scroll port we'll be using to display the visible rows.
+ this.scrollPort_ = new hterm.ScrollPort(this);
+ this.scrollPort_.subscribe('resize', this.onResize_.bind(this));
+ this.scrollPort_.subscribe('scroll', this.onScroll_.bind(this));
+ this.scrollPort_.subscribe('paste', this.onPaste_.bind(this));
+ this.scrollPort_.subscribe('focus', this.onScrollportFocus_.bind(this));
+ this.scrollPort_.onCopy = this.onCopy_.bind(this);
+
+ // The div that contains this terminal.
+ this.div_ = null;
+
+ // The document that contains the scrollPort. Defaulted to the global
+ // document here so that the terminal is functional even if it hasn't been
+ // inserted into a document yet, but re-set in decorate().
+ this.document_ = window.document;
+
+ // The rows that have scrolled off screen and are no longer addressable.
+ this.scrollbackRows_ = [];
+
+ // Saved tab stops.
+ this.tabStops_ = [];
+
+ // Keep track of whether default tab stops have been erased; after a TBC
+ // clears all tab stops, defaults aren't restored on resize until a reset.
+ this.defaultTabStops = true;
+
+ // The VT's notion of the top and bottom rows. Used during some VT
+ // cursor positioning and scrolling commands.
+ this.vtScrollTop_ = null;
+ this.vtScrollBottom_ = null;
+
+ // The DIV element for the visible cursor.
+ this.cursorNode_ = null;
+
+ // The current cursor shape of the terminal.
+ this.cursorShape_ = hterm.Terminal.cursorShape.BLOCK;
+
+ // Cursor blink on/off cycle in ms, overwritten by prefs once they're loaded.
+ this.cursorBlinkCycle_ = [100, 100];
+
+ // Pre-bound onCursorBlink_ handler, so we don't have to do this for each
+ // cursor on/off servicing.
+ this.myOnCursorBlink_ = this.onCursorBlink_.bind(this);
+
+ // These prefs are cached so we don't have to read from local storage with
+ // each output and keystroke. They are initialized by the preference manager.
+ this.backgroundColor_ = null;
+ this.foregroundColor_ = null;
+ this.scrollOnOutput_ = null;
+ this.scrollOnKeystroke_ = null;
+ this.scrollWheelArrowKeys_ = null;
+
+ // True if we should override mouse event reporting to allow local selection.
+ this.defeatMouseReports_ = false;
+
+ // Whether to auto hide the mouse cursor when typing.
+ this.setAutomaticMouseHiding();
+ // Timer to keep mouse visible while it's being used.
+ this.mouseHideDelay_ = null;
+
+ // Terminal bell sound.
+ this.bellAudio_ = this.document_.createElement('audio');
+ this.bellAudio_.id = 'hterm:bell-audio';
+ this.bellAudio_.setAttribute('preload', 'auto');
+
+ // The AccessibilityReader object for announcing command output.
+ this.accessibilityReader_ = null;
+
+ // The context menu object.
+ this.contextMenu = new hterm.ContextMenu();
+
+ // All terminal bell notifications that have been generated (not necessarily
+ // shown).
+ this.bellNotificationList_ = [];
+
+ // Whether we have permission to display notifications.
+ this.desktopNotificationBell_ = false;
+
+ // Cursor position and attributes saved with DECSC.
+ this.savedOptions_ = {};
+
+ // The current mode bits for the terminal.
+ this.options_ = new hterm.Options();
+
+ // Timeouts we might need to clear.
+ this.timeouts_ = {};
+
+ // The VT escape sequence interpreter.
+ this.vt = new hterm.VT(this);
+
+ this.saveCursorAndState(true);
+
+ // The keyboard handler.
+ this.keyboard = new hterm.Keyboard(this);
+
+ // General IO interface that can be given to third parties without exposing
+ // the entire terminal object.
+ this.io = new hterm.Terminal.IO(this);
+
+ // True if mouse-click-drag should scroll the terminal.
+ this.enableMouseDragScroll = true;
+
+ this.copyOnSelect = null;
+ this.mouseRightClickPaste = null;
+ this.mousePasteButton = null;
+
+ // Whether to use the default window copy behavior.
+ this.useDefaultWindowCopy = false;
+
+ this.clearSelectionAfterCopy = true;
+
+ this.realizeSize_(80, 24);
+ this.setDefaultTabStops();
+
+ // Whether we allow images to be shown.
+ this.allowImagesInline = null;
+
+ this.reportFocus = false;
+
+ this.setProfile(opt_profileId || 'default',
+ function() { this.onTerminalReady(); }.bind(this));
+};
+
+/**
+ * Possible cursor shapes.
+ */
+hterm.Terminal.cursorShape = {
+ BLOCK: 'BLOCK',
+ BEAM: 'BEAM',
+ UNDERLINE: 'UNDERLINE'
+};
+
+/**
+ * Clients should override this to be notified when the terminal is ready
+ * for use.
+ *
+ * The terminal initialization is asynchronous, and shouldn't be used before
+ * this method is called.
+ */
+hterm.Terminal.prototype.onTerminalReady = function() { };
+
+/**
+ * Default tab with of 8 to match xterm.
+ */
+hterm.Terminal.prototype.tabWidth = 8;
+
+/**
+ * Select a preference profile.
+ *
+ * This will load the terminal preferences for the given profile name and
+ * associate subsequent preference changes with the new preference profile.
+ *
+ * @param {string} profileId The name of the preference profile. Forward slash
+ * characters will be removed from the name.
+ * @param {function} opt_callback Optional callback to invoke when the profile
+ * transition is complete.
+ */
+hterm.Terminal.prototype.setProfile = function(profileId, opt_callback) {
+ this.profileId_ = profileId.replace(/\//g, '');
+
+ var terminal = this;
+
+ if (this.prefs_)
+ this.prefs_.deactivate();
+
+ this.prefs_ = new hterm.PreferenceManager(this.profileId_);
+ this.prefs_.addObservers(null, {
+ 'alt-gr-mode': function(v) {
+ if (v == null) {
+ if (navigator.language.toLowerCase() == 'en-us') {
+ v = 'none';
+ } else {
+ v = 'right-alt';
+ }
+ } else if (typeof v == 'string') {
+ v = v.toLowerCase();
+ } else {
+ v = 'none';
+ }
+
+ if (!/^(none|ctrl-alt|left-alt|right-alt)$/.test(v))
+ v = 'none';
+
+ terminal.keyboard.altGrMode = v;
+ },
+
+ 'alt-backspace-is-meta-backspace': function(v) {
+ terminal.keyboard.altBackspaceIsMetaBackspace = v;
+ },
+
+ 'alt-is-meta': function(v) {
+ terminal.keyboard.altIsMeta = v;
+ },
+
+ 'alt-sends-what': function(v) {
+ if (!/^(escape|8-bit|browser-key)$/.test(v))
+ v = 'escape';
+
+ terminal.keyboard.altSendsWhat = v;
+ },
+
+ 'audible-bell-sound': function(v) {
+ var ary = v.match(/^lib-resource:(\S+)/);
+ if (ary) {
+ terminal.bellAudio_.setAttribute('src',
+ lib.resource.getDataUrl(ary[1]));
+ } else {
+ terminal.bellAudio_.setAttribute('src', v);
+ }
+ },
+
+ 'desktop-notification-bell': function(v) {
+ if (v && Notification) {
+ terminal.desktopNotificationBell_ =
+ Notification.permission === 'granted';
+ if (!terminal.desktopNotificationBell_) {
+ // Note: We don't call Notification.requestPermission here because
+ // Chrome requires the call be the result of a user action (such as an
+ // onclick handler), and pref listeners are run asynchronously.
+ //
+ // A way of working around this would be to display a dialog in the
+ // terminal with a "click-to-request-permission" button.
+ console.warn('desktop-notification-bell is true but we do not have ' +
+ 'permission to display notifications.');
+ }
+ } else {
+ terminal.desktopNotificationBell_ = false;
+ }
+ },
+
+ 'background-color': function(v) {
+ terminal.setBackgroundColor(v);
+ },
+
+ 'background-image': function(v) {
+ terminal.scrollPort_.setBackgroundImage(v);
+ },
+
+ 'background-size': function(v) {
+ terminal.scrollPort_.setBackgroundSize(v);
+ },
+
+ 'background-position': function(v) {
+ terminal.scrollPort_.setBackgroundPosition(v);
+ },
+
+ 'backspace-sends-backspace': function(v) {
+ terminal.keyboard.backspaceSendsBackspace = v;
+ },
+
+ 'character-map-overrides': function(v) {
+ if (!(v == null || v instanceof Object)) {
+ console.warn('Preference character-map-modifications is not an ' +
+ 'object: ' + v);
+ return;
+ }
+
+ terminal.vt.characterMaps.reset();
+ terminal.vt.characterMaps.setOverrides(v);
+ },
+
+ 'cursor-blink': function(v) {
+ terminal.setCursorBlink(!!v);
+ },
+
+ 'cursor-blink-cycle': function(v) {
+ if (v instanceof Array &&
+ typeof v[0] == 'number' &&
+ typeof v[1] == 'number') {
+ terminal.cursorBlinkCycle_ = v;
+ } else if (typeof v == 'number') {
+ terminal.cursorBlinkCycle_ = [v, v];
+ } else {
+ // Fast blink indicates an error.
+ terminal.cursorBlinkCycle_ = [100, 100];
+ }
+ },
+
+ 'cursor-color': function(v) {
+ terminal.setCursorColor(v);
+ },
+
+ 'color-palette-overrides': function(v) {
+ if (!(v == null || v instanceof Object || v instanceof Array)) {
+ console.warn('Preference color-palette-overrides is not an array or ' +
+ 'object: ' + v);
+ return;
+ }
+
+ lib.colors.colorPalette = lib.colors.stockColorPalette.concat();
+
+ if (v) {
+ for (var key in v) {
+ var i = parseInt(key);
+ if (isNaN(i) || i < 0 || i > 255) {
+ console.log('Invalid value in palette: ' + key + ': ' + v[key]);
+ continue;
+ }
+
+ if (v[i]) {
+ var rgb = lib.colors.normalizeCSS(v[i]);
+ if (rgb)
+ lib.colors.colorPalette[i] = rgb;
+ }
+ }
+ }
+
+ terminal.primaryScreen_.textAttributes.resetColorPalette();
+ terminal.alternateScreen_.textAttributes.resetColorPalette();
+ },
+
+ 'copy-on-select': function(v) {
+ terminal.copyOnSelect = !!v;
+ },
+
+ 'use-default-window-copy': function(v) {
+ terminal.useDefaultWindowCopy = !!v;
+ },
+
+ 'clear-selection-after-copy': function(v) {
+ terminal.clearSelectionAfterCopy = !!v;
+ },
+
+ 'ctrl-plus-minus-zero-zoom': function(v) {
+ terminal.keyboard.ctrlPlusMinusZeroZoom = v;
+ },
+
+ 'ctrl-c-copy': function(v) {
+ terminal.keyboard.ctrlCCopy = v;
+ },
+
+ 'ctrl-v-paste': function(v) {
+ terminal.keyboard.ctrlVPaste = v;
+ terminal.scrollPort_.setCtrlVPaste(v);
+ },
+
+ 'paste-on-drop': function(v) {
+ terminal.scrollPort_.setPasteOnDrop(v);
+ },
+
+ 'east-asian-ambiguous-as-two-column': function(v) {
+ lib.wc.regardCjkAmbiguous = v;
+ },
+
+ 'enable-8-bit-control': function(v) {
+ terminal.vt.enable8BitControl = !!v;
+ },
+
+ 'enable-bold': function(v) {
+ terminal.syncBoldSafeState();
+ },
+
+ 'enable-bold-as-bright': function(v) {
+ terminal.primaryScreen_.textAttributes.enableBoldAsBright = !!v;
+ terminal.alternateScreen_.textAttributes.enableBoldAsBright = !!v;
+ },
+
+ 'enable-blink': function(v) {
+ terminal.setTextBlink(!!v);
+ },
+
+ 'enable-clipboard-write': function(v) {
+ terminal.vt.enableClipboardWrite = !!v;
+ },
+
+ 'enable-dec12': function(v) {
+ terminal.vt.enableDec12 = !!v;
+ },
+
+ 'enable-csi-j-3': function(v) {
+ terminal.vt.enableCsiJ3 = !!v;
+ },
+
+ 'font-family': function(v) {
+ terminal.syncFontFamily();
+ },
+
+ 'font-size': function(v) {
+ v = parseInt(v);
+ if (v <= 0) {
+ console.error(`Invalid font size: ${v}`);
+ return;
+ }
+
+ terminal.setFontSize(v);
+ },
+
+ 'font-smoothing': function(v) {
+ terminal.syncFontFamily();
+ },
+
+ 'foreground-color': function(v) {
+ terminal.setForegroundColor(v);
+ },
+
+ 'hide-mouse-while-typing': function(v) {
+ terminal.setAutomaticMouseHiding(v);
+ },
+
+ 'home-keys-scroll': function(v) {
+ terminal.keyboard.homeKeysScroll = v;
+ },
+
+ 'keybindings': function(v) {
+ terminal.keyboard.bindings.clear();
+
+ if (!v)
+ return;
+
+ if (!(v instanceof Object)) {
+ console.error('Error in keybindings preference: Expected object');
+ return;
+ }
+
+ try {
+ terminal.keyboard.bindings.addBindings(v);
+ } catch (ex) {
+ console.error('Error in keybindings preference: ' + ex);
+ }
+ },
+
+ 'media-keys-are-fkeys': function(v) {
+ terminal.keyboard.mediaKeysAreFKeys = v;
+ },
+
+ 'meta-sends-escape': function(v) {
+ terminal.keyboard.metaSendsEscape = v;
+ },
+
+ 'mouse-right-click-paste': function(v) {
+ terminal.mouseRightClickPaste = v;
+ },
+
+ 'mouse-paste-button': function(v) {
+ terminal.syncMousePasteButton();
+ },
+
+ 'page-keys-scroll': function(v) {
+ terminal.keyboard.pageKeysScroll = v;
+ },
+
+ 'pass-alt-number': function(v) {
+ if (v == null) {
+ // Let Alt-1..9 pass to the browser (to control tab switching) on
+ // non-OS X systems, or if hterm is not opened in an app window.
+ v = (hterm.os != 'mac' && hterm.windowType != 'popup');
+ }
+
+ terminal.passAltNumber = v;
+ },
+
+ 'pass-ctrl-number': function(v) {
+ if (v == null) {
+ // Let Ctrl-1..9 pass to the browser (to control tab switching) on
+ // non-OS X systems, or if hterm is not opened in an app window.
+ v = (hterm.os != 'mac' && hterm.windowType != 'popup');
+ }
+
+ terminal.passCtrlNumber = v;
+ },
+
+ 'pass-meta-number': function(v) {
+ if (v == null) {
+ // Let Meta-1..9 pass to the browser (to control tab switching) on
+ // OS X systems, or if hterm is not opened in an app window.
+ v = (hterm.os == 'mac' && hterm.windowType != 'popup');
+ }
+
+ terminal.passMetaNumber = v;
+ },
+
+ 'pass-meta-v': function(v) {
+ terminal.keyboard.passMetaV = v;
+ },
+
+ 'receive-encoding': function(v) {
+ if (!(/^(utf-8|raw)$/).test(v)) {
+ console.warn('Invalid value for "receive-encoding": ' + v);
+ v = 'utf-8';
+ }
+
+ terminal.vt.characterEncoding = v;
+ },
+
+ 'scroll-on-keystroke': function(v) {
+ terminal.scrollOnKeystroke_ = v;
+ },
+
+ 'scroll-on-output': function(v) {
+ terminal.scrollOnOutput_ = v;
+ },
+
+ 'scrollbar-visible': function(v) {
+ terminal.setScrollbarVisible(v);
+ },
+
+ 'scroll-wheel-may-send-arrow-keys': function(v) {
+ terminal.scrollWheelArrowKeys_ = v;
+ },
+
+ 'scroll-wheel-move-multiplier': function(v) {
+ terminal.setScrollWheelMoveMultipler(v);
+ },
+
+ 'shift-insert-paste': function(v) {
+ terminal.keyboard.shiftInsertPaste = v;
+ },
+
+ 'terminal-encoding': function(v) {
+ terminal.vt.setEncoding(v);
+ },
+
+ 'user-css': function(v) {
+ terminal.scrollPort_.setUserCssUrl(v);
+ },
+
+ 'user-css-text': function(v) {
+ terminal.scrollPort_.setUserCssText(v);
+ },
+
+ 'word-break-match-left': function(v) {
+ terminal.primaryScreen_.wordBreakMatchLeft = v;
+ terminal.alternateScreen_.wordBreakMatchLeft = v;
+ },
+
+ 'word-break-match-right': function(v) {
+ terminal.primaryScreen_.wordBreakMatchRight = v;
+ terminal.alternateScreen_.wordBreakMatchRight = v;
+ },
+
+ 'word-break-match-middle': function(v) {
+ terminal.primaryScreen_.wordBreakMatchMiddle = v;
+ terminal.alternateScreen_.wordBreakMatchMiddle = v;
+ },
+
+ 'allow-images-inline': function(v) {
+ terminal.allowImagesInline = v;
+ },
+ });
+
+ this.prefs_.readStorage(function() {
+ this.prefs_.notifyAll();
+
+ if (opt_callback)
+ opt_callback();
+ }.bind(this));
+};
+
+
+/**
+ * Returns the preferences manager used for configuring this terminal.
+ *
+ * @return {hterm.PreferenceManager}
+ */
+hterm.Terminal.prototype.getPrefs = function() {
+ return this.prefs_;
+};
+
+/**
+ * Enable or disable bracketed paste mode.
+ *
+ * @param {boolean} state The value to set.
+ */
+hterm.Terminal.prototype.setBracketedPaste = function(state) {
+ this.options_.bracketedPaste = state;
+};
+
+/**
+ * Set the color for the cursor.
+ *
+ * If you want this setting to persist, set it through prefs_, rather than
+ * with this method.
+ *
+ * @param {string=} color The color to set. If not defined, we reset to the
+ * saved user preference.
+ */
+hterm.Terminal.prototype.setCursorColor = function(color) {
+ if (color === undefined)
+ color = this.prefs_.get('cursor-color');
+
+ this.setCssVar('cursor-color', color);
+};
+
+/**
+ * Return the current cursor color as a string.
+ * @return {string}
+ */
+hterm.Terminal.prototype.getCursorColor = function() {
+ return this.getCssVar('cursor-color');
+};
+
+/**
+ * Enable or disable mouse based text selection in the terminal.
+ *
+ * @param {boolean} state The value to set.
+ */
+hterm.Terminal.prototype.setSelectionEnabled = function(state) {
+ this.enableMouseDragScroll = state;
+};
+
+/**
+ * Set the background color.
+ *
+ * If you want this setting to persist, set it through prefs_, rather than
+ * with this method.
+ *
+ * @param {string=} color The color to set. If not defined, we reset to the
+ * saved user preference.
+ */
+hterm.Terminal.prototype.setBackgroundColor = function(color) {
+ if (color === undefined)
+ color = this.prefs_.get('background-color');
+
+ this.backgroundColor_ = lib.colors.normalizeCSS(color);
+ this.primaryScreen_.textAttributes.setDefaults(
+ this.foregroundColor_, this.backgroundColor_);
+ this.alternateScreen_.textAttributes.setDefaults(
+ this.foregroundColor_, this.backgroundColor_);
+ this.scrollPort_.setBackgroundColor(color);
+};
+
+/**
+ * Return the current terminal background color.
+ *
+ * Intended for use by other classes, so we don't have to expose the entire
+ * prefs_ object.
+ *
+ * @return {string}
+ */
+hterm.Terminal.prototype.getBackgroundColor = function() {
+ return this.backgroundColor_;
+};
+
+/**
+ * Set the foreground color.
+ *
+ * If you want this setting to persist, set it through prefs_, rather than
+ * with this method.
+ *
+ * @param {string=} color The color to set. If not defined, we reset to the
+ * saved user preference.
+ */
+hterm.Terminal.prototype.setForegroundColor = function(color) {
+ if (color === undefined)
+ color = this.prefs_.get('foreground-color');
+
+ this.foregroundColor_ = lib.colors.normalizeCSS(color);
+ this.primaryScreen_.textAttributes.setDefaults(
+ this.foregroundColor_, this.backgroundColor_);
+ this.alternateScreen_.textAttributes.setDefaults(
+ this.foregroundColor_, this.backgroundColor_);
+ this.scrollPort_.setForegroundColor(color);
+};
+
+/**
+ * Return the current terminal foreground color.
+ *
+ * Intended for use by other classes, so we don't have to expose the entire
+ * prefs_ object.
+ *
+ * @return {string}
+ */
+hterm.Terminal.prototype.getForegroundColor = function() {
+ return this.foregroundColor_;
+};
+
+/**
+ * Create a new instance of a terminal command and run it with a given
+ * argument string.
+ *
+ * @param {function} commandClass The constructor for a terminal command.
+ * @param {string} argString The argument string to pass to the command.
+ */
+hterm.Terminal.prototype.runCommandClass = function(commandClass, argString) {
+ var environment = this.prefs_.get('environment');
+ if (typeof environment != 'object' || environment == null)
+ environment = {};
+
+ var self = this;
+ this.command = new commandClass(
+ { argString: argString || '',
+ io: this.io.push(),
+ environment: environment,
+ onExit: function(code) {
+ self.io.pop();
+ self.uninstallKeyboard();
+ if (self.prefs_.get('close-on-exit'))
+ window.close();
+ }
+ });
+
+ this.installKeyboard();
+ this.command.run();
+};
+
+/**
+ * Returns true if the current screen is the primary screen, false otherwise.
+ *
+ * @return {boolean}
+ */
+hterm.Terminal.prototype.isPrimaryScreen = function() {
+ return this.screen_ == this.primaryScreen_;
+};
+
+/**
+ * Install the keyboard handler for this terminal.
+ *
+ * This will prevent the browser from seeing any keystrokes sent to the
+ * terminal.
+ */
+hterm.Terminal.prototype.installKeyboard = function() {
+ this.keyboard.installKeyboard(this.scrollPort_.getDocument().body);
+};
+
+/**
+ * Uninstall the keyboard handler for this terminal.
+ */
+hterm.Terminal.prototype.uninstallKeyboard = function() {
+ this.keyboard.installKeyboard(null);
+};
+
+/**
+ * Set a CSS variable.
+ *
+ * Normally this is used to set variables in the hterm namespace.
+ *
+ * @param {string} name The variable to set.
+ * @param {string} value The value to assign to the variable.
+ * @param {string?} opt_prefix The variable namespace/prefix to use.
+ */
+hterm.Terminal.prototype.setCssVar = function(name, value,
+ opt_prefix='--hterm-') {
+ this.document_.documentElement.style.setProperty(
+ `${opt_prefix}${name}`, value);
+};
+
+/**
+ * Get a CSS variable.
+ *
+ * Normally this is used to get variables in the hterm namespace.
+ *
+ * @param {string} name The variable to read.
+ * @param {string?} opt_prefix The variable namespace/prefix to use.
+ * @return {string} The current setting for this variable.
+ */
+hterm.Terminal.prototype.getCssVar = function(name, opt_prefix='--hterm-') {
+ return this.document_.documentElement.style.getPropertyValue(
+ `${opt_prefix}${name}`);
+};
+
+/**
+ * Set the font size for this terminal.
+ *
+ * Call setFontSize(0) to reset to the default font size.
+ *
+ * This function does not modify the font-size preference.
+ *
+ * @param {number} px The desired font size, in pixels.
+ */
+hterm.Terminal.prototype.setFontSize = function(px) {
+ if (px <= 0)
+ px = this.prefs_.get('font-size');
+
+ this.scrollPort_.setFontSize(px);
+ this.setCssVar('charsize-width', this.scrollPort_.characterSize.width + 'px');
+ this.setCssVar('charsize-height',
+ this.scrollPort_.characterSize.height + 'px');
+};
+
+/**
+ * Get the current font size.
+ *
+ * @return {number}
+ */
+hterm.Terminal.prototype.getFontSize = function() {
+ return this.scrollPort_.getFontSize();
+};
+
+/**
+ * Get the current font family.
+ *
+ * @return {string}
+ */
+hterm.Terminal.prototype.getFontFamily = function() {
+ return this.scrollPort_.getFontFamily();
+};
+
+/**
+ * Set the CSS "font-family" for this terminal.
+ */
+hterm.Terminal.prototype.syncFontFamily = function() {
+ this.scrollPort_.setFontFamily(this.prefs_.get('font-family'),
+ this.prefs_.get('font-smoothing'));
+ this.syncBoldSafeState();
+};
+
+/**
+ * Set this.mousePasteButton based on the mouse-paste-button pref,
+ * autodetecting if necessary.
+ */
+hterm.Terminal.prototype.syncMousePasteButton = function() {
+ var button = this.prefs_.get('mouse-paste-button');
+ if (typeof button == 'number') {
+ this.mousePasteButton = button;
+ return;
+ }
+
+ if (hterm.os != 'linux') {
+ this.mousePasteButton = 1; // Middle mouse button.
+ } else {
+ this.mousePasteButton = 2; // Right mouse button.
+ }
+};
+
+/**
+ * Enable or disable bold based on the enable-bold pref, autodetecting if
+ * necessary.
+ */
+hterm.Terminal.prototype.syncBoldSafeState = function() {
+ var enableBold = this.prefs_.get('enable-bold');
+ if (enableBold !== null) {
+ this.primaryScreen_.textAttributes.enableBold = enableBold;
+ this.alternateScreen_.textAttributes.enableBold = enableBold;
+ return;
+ }
+
+ var normalSize = this.scrollPort_.measureCharacterSize();
+ var boldSize = this.scrollPort_.measureCharacterSize('bold');
+
+ var isBoldSafe = normalSize.equals(boldSize);
+ if (!isBoldSafe) {
+ console.warn('Bold characters disabled: Size of bold weight differs ' +
+ 'from normal. Font family is: ' +
+ this.scrollPort_.getFontFamily());
+ }
+
+ this.primaryScreen_.textAttributes.enableBold = isBoldSafe;
+ this.alternateScreen_.textAttributes.enableBold = isBoldSafe;
+};
+
+/**
+ * Control text blinking behavior.
+ *
+ * @param {boolean=} state Whether to enable support for blinking text.
+ */
+hterm.Terminal.prototype.setTextBlink = function(state) {
+ if (state === undefined)
+ state = this.prefs_.get('enable-blink');
+ this.setCssVar('blink-node-duration', state ? '0.7s' : '0');
+};
+
+/**
+ * Set the mouse cursor style based on the current terminal mode.
+ */
+hterm.Terminal.prototype.syncMouseStyle = function() {
+ this.setCssVar('mouse-cursor-style',
+ this.vt.mouseReport == this.vt.MOUSE_REPORT_DISABLED ?
+ 'var(--hterm-mouse-cursor-text)' :
+ 'var(--hterm-mouse-cursor-default)');
+};
+
+/**
+ * Return a copy of the current cursor position.
+ *
+ * @return {hterm.RowCol} The RowCol object representing the current position.
+ */
+hterm.Terminal.prototype.saveCursor = function() {
+ return this.screen_.cursorPosition.clone();
+};
+
+/**
+ * Return the current text attributes.
+ *
+ * @return {string}
+ */
+hterm.Terminal.prototype.getTextAttributes = function() {
+ return this.screen_.textAttributes;
+};
+
+/**
+ * Set the text attributes.
+ *
+ * @param {string} textAttributes The attributes to set.
+ */
+hterm.Terminal.prototype.setTextAttributes = function(textAttributes) {
+ this.screen_.textAttributes = textAttributes;
+};
+
+/**
+ * Return the current browser zoom factor applied to the terminal.
+ *
+ * @return {number} The current browser zoom factor.
+ */
+hterm.Terminal.prototype.getZoomFactor = function() {
+ return this.scrollPort_.characterSize.zoomFactor;
+};
+
+/**
+ * Change the title of this terminal's window.
+ *
+ * @param {string} title The title to set.
+ */
+hterm.Terminal.prototype.setWindowTitle = function(title) {
+ window.document.title = title;
+};
+
+/**
+ * Restore a previously saved cursor position.
+ *
+ * @param {hterm.RowCol} cursor The position to restore.
+ */
+hterm.Terminal.prototype.restoreCursor = function(cursor) {
+ var row = lib.f.clamp(cursor.row, 0, this.screenSize.height - 1);
+ var column = lib.f.clamp(cursor.column, 0, this.screenSize.width - 1);
+ this.screen_.setCursorPosition(row, column);
+ if (cursor.column > column ||
+ cursor.column == column && cursor.overflow) {
+ this.screen_.cursorPosition.overflow = true;
+ }
+};
+
+/**
+ * Clear the cursor's overflow flag.
+ */
+hterm.Terminal.prototype.clearCursorOverflow = function() {
+ this.screen_.cursorPosition.overflow = false;
+};
+
+/**
+ * Save the current cursor state to the corresponding screens.
+ *
+ * See the hterm.Screen.CursorState class for more details.
+ *
+ * @param {boolean=} both If true, update both screens, else only update the
+ * current screen.
+ */
+hterm.Terminal.prototype.saveCursorAndState = function(both) {
+ if (both) {
+ this.primaryScreen_.saveCursorAndState(this.vt);
+ this.alternateScreen_.saveCursorAndState(this.vt);
+ } else
+ this.screen_.saveCursorAndState(this.vt);
+};
+
+/**
+ * Restore the saved cursor state in the corresponding screens.
+ *
+ * See the hterm.Screen.CursorState class for more details.
+ *
+ * @param {boolean=} both If true, update both screens, else only update the
+ * current screen.
+ */
+hterm.Terminal.prototype.restoreCursorAndState = function(both) {
+ if (both) {
+ this.primaryScreen_.restoreCursorAndState(this.vt);
+ this.alternateScreen_.restoreCursorAndState(this.vt);
+ } else
+ this.screen_.restoreCursorAndState(this.vt);
+};
+
+/**
+ * Sets the cursor shape
+ *
+ * @param {string} shape The shape to set.
+ */
+hterm.Terminal.prototype.setCursorShape = function(shape) {
+ this.cursorShape_ = shape;
+ this.restyleCursor_();
+};
+
+/**
+ * Get the cursor shape
+ *
+ * @return {string}
+ */
+hterm.Terminal.prototype.getCursorShape = function() {
+ return this.cursorShape_;
+};
+
+/**
+ * Set the width of the terminal, resizing the UI to match.
+ *
+ * @param {number} columnCount
+ */
+hterm.Terminal.prototype.setWidth = function(columnCount) {
+ if (columnCount == null) {
+ this.div_.style.width = '100%';
+ return;
+ }
+
+ this.div_.style.width = Math.ceil(
+ this.scrollPort_.characterSize.width *
+ columnCount + this.scrollPort_.currentScrollbarWidthPx) + 'px';
+ this.realizeSize_(columnCount, this.screenSize.height);
+ this.scheduleSyncCursorPosition_();
+};
+
+/**
+ * Set the height of the terminal, resizing the UI to match.
+ *
+ * @param {number} rowCount The height in rows.
+ */
+hterm.Terminal.prototype.setHeight = function(rowCount) {
+ if (rowCount == null) {
+ this.div_.style.height = '100%';
+ return;
+ }
+
+ this.div_.style.height =
+ this.scrollPort_.characterSize.height * rowCount + 'px';
+ this.realizeSize_(this.screenSize.width, rowCount);
+ this.scheduleSyncCursorPosition_();
+};
+
+/**
+ * Deal with terminal size changes.
+ *
+ * @param {number} columnCount The number of columns.
+ * @param {number} rowCount The number of rows.
+ */
+hterm.Terminal.prototype.realizeSize_ = function(columnCount, rowCount) {
+ if (columnCount != this.screenSize.width)
+ this.realizeWidth_(columnCount);
+
+ if (rowCount != this.screenSize.height)
+ this.realizeHeight_(rowCount);
+
+ // Send new terminal size to plugin.
+ this.io.onTerminalResize_(columnCount, rowCount);
+};
+
+/**
+ * Deal with terminal width changes.
+ *
+ * This function does what needs to be done when the terminal width changes
+ * out from under us. It happens here rather than in onResize_() because this
+ * code may need to run synchronously to handle programmatic changes of
+ * terminal width.
+ *
+ * Relying on the browser to send us an async resize event means we may not be
+ * in the correct state yet when the next escape sequence hits.
+ *
+ * @param {number} columnCount The number of columns.
+ */
+hterm.Terminal.prototype.realizeWidth_ = function(columnCount) {
+ if (columnCount <= 0)
+ throw new Error('Attempt to realize bad width: ' + columnCount);
+
+ var deltaColumns = columnCount - this.screen_.getWidth();
+
+ this.screenSize.width = columnCount;
+ this.screen_.setColumnCount(columnCount);
+
+ if (deltaColumns > 0) {
+ if (this.defaultTabStops)
+ this.setDefaultTabStops(this.screenSize.width - deltaColumns);
+ } else {
+ for (var i = this.tabStops_.length - 1; i >= 0; i--) {
+ if (this.tabStops_[i] < columnCount)
+ break;
+
+ this.tabStops_.pop();
+ }
+ }
+
+ this.screen_.setColumnCount(this.screenSize.width);
+};
+
+/**
+ * Deal with terminal height changes.
+ *
+ * This function does what needs to be done when the terminal height changes
+ * out from under us. It happens here rather than in onResize_() because this
+ * code may need to run synchronously to handle programmatic changes of
+ * terminal height.
+ *
+ * Relying on the browser to send us an async resize event means we may not be
+ * in the correct state yet when the next escape sequence hits.
+ *
+ * @param {number} rowCount The number of rows.
+ */
+hterm.Terminal.prototype.realizeHeight_ = function(rowCount) {
+ if (rowCount <= 0)
+ throw new Error('Attempt to realize bad height: ' + rowCount);
+
+ var deltaRows = rowCount - this.screen_.getHeight();
+
+ this.screenSize.height = rowCount;
+
+ var cursor = this.saveCursor();
+
+ if (deltaRows < 0) {
+ // Screen got smaller.
+ deltaRows *= -1;
+ while (deltaRows) {
+ var lastRow = this.getRowCount() - 1;
+ if (lastRow - this.scrollbackRows_.length == cursor.row)
+ break;
+
+ if (this.getRowText(lastRow))
+ break;
+
+ this.screen_.popRow();
+ deltaRows--;
+ }
+
+ var ary = this.screen_.shiftRows(deltaRows);
+ this.scrollbackRows_.push.apply(this.scrollbackRows_, ary);
+
+ // We just removed rows from the top of the screen, we need to update
+ // the cursor to match.
+ cursor.row = Math.max(cursor.row - deltaRows, 0);
+ } else if (deltaRows > 0) {
+ // Screen got larger.
+
+ if (deltaRows <= this.scrollbackRows_.length) {
+ var scrollbackCount = Math.min(deltaRows, this.scrollbackRows_.length);
+ var rows = this.scrollbackRows_.splice(
+ this.scrollbackRows_.length - scrollbackCount, scrollbackCount);
+ this.screen_.unshiftRows(rows);
+ deltaRows -= scrollbackCount;
+ cursor.row += scrollbackCount;
+ }
+
+ if (deltaRows)
+ this.appendRows_(deltaRows);
+ }
+
+ this.setVTScrollRegion(null, null);
+ this.restoreCursor(cursor);
+};
+
+/**
+ * Scroll the terminal to the top of the scrollback buffer.
+ */
+hterm.Terminal.prototype.scrollHome = function() {
+ this.scrollPort_.scrollRowToTop(0);
+};
+
+/**
+ * Scroll the terminal to the end.
+ */
+hterm.Terminal.prototype.scrollEnd = function() {
+ this.scrollPort_.scrollRowToBottom(this.getRowCount());
+};
+
+/**
+ * Scroll the terminal one page up (minus one line) relative to the current
+ * position.
+ */
+hterm.Terminal.prototype.scrollPageUp = function() {
+ this.scrollPort_.scrollPageUp();
+};
+
+/**
+ * Scroll the terminal one page down (minus one line) relative to the current
+ * position.
+ */
+hterm.Terminal.prototype.scrollPageDown = function() {
+ this.scrollPort_.scrollPageDown();
+};
+
+/**
+ * Scroll the terminal one line up relative to the current position.
+ */
+hterm.Terminal.prototype.scrollLineUp = function() {
+ var i = this.scrollPort_.getTopRowIndex();
+ this.scrollPort_.scrollRowToTop(i - 1);
+};
+
+/**
+ * Scroll the terminal one line down relative to the current position.
+ */
+hterm.Terminal.prototype.scrollLineDown = function() {
+ var i = this.scrollPort_.getTopRowIndex();
+ this.scrollPort_.scrollRowToTop(i + 1);
+};
+
+/**
+ * Clear primary screen, secondary screen, and the scrollback buffer.
+ */
+hterm.Terminal.prototype.wipeContents = function() {
+ this.clearHome(this.primaryScreen_);
+ this.clearHome(this.alternateScreen_);
+
+ this.clearScrollback();
+};
+
+/**
+ * Clear scrollback buffer.
+ */
+hterm.Terminal.prototype.clearScrollback = function() {
+ // Move to the end of the buffer in case the screen was scrolled back.
+ // We're going to throw it away which would leave the display invalid.
+ this.scrollEnd();
+
+ this.scrollbackRows_.length = 0;
+ this.scrollPort_.resetCache();
+
+ [this.primaryScreen_, this.alternateScreen_].forEach((screen) => {
+ const bottom = screen.getHeight();
+ this.renumberRows_(0, bottom, screen);
+ });
+
+ this.syncCursorPosition_();
+ this.scrollPort_.invalidate();
+};
+
+/**
+ * Full terminal reset.
+ *
+ * Perform a full reset to the default values listed in
+ * https://vt100.net/docs/vt510-rm/RIS.html
+ */
+hterm.Terminal.prototype.reset = function() {
+ this.vt.reset();
+
+ this.clearAllTabStops();
+ this.setDefaultTabStops();
+
+ const resetScreen = (screen) => {
+ // We want to make sure to reset the attributes before we clear the screen.
+ // The attributes might be used to initialize default/empty rows.
+ screen.textAttributes.reset();
+ screen.textAttributes.resetColorPalette();
+ this.clearHome(screen);
+ screen.saveCursorAndState(this.vt);
+ };
+ resetScreen(this.primaryScreen_);
+ resetScreen(this.alternateScreen_);
+
+ // Reset terminal options to their default values.
+ this.options_ = new hterm.Options();
+ this.setCursorBlink(!!this.prefs_.get('cursor-blink'));
+
+ this.setVTScrollRegion(null, null);
+
+ this.setCursorVisible(true);
+};
+
+/**
+ * Soft terminal reset.
+ *
+ * Perform a soft reset to the default values listed in
+ * http://www.vt100.net/docs/vt510-rm/DECSTR#T5-9
+ */
+hterm.Terminal.prototype.softReset = function() {
+ this.vt.reset();
+
+ // Reset terminal options to their default values.
+ this.options_ = new hterm.Options();
+
+ // We show the cursor on soft reset but do not alter the blink state.
+ this.options_.cursorBlink = !!this.timeouts_.cursorBlink;
+
+ const resetScreen = (screen) => {
+ // Xterm also resets the color palette on soft reset, even though it doesn't
+ // seem to be documented anywhere.
+ screen.textAttributes.reset();
+ screen.textAttributes.resetColorPalette();
+ screen.saveCursorAndState(this.vt);
+ };
+ resetScreen(this.primaryScreen_);
+ resetScreen(this.alternateScreen_);
+
+ // The xterm man page explicitly says this will happen on soft reset.
+ this.setVTScrollRegion(null, null);
+
+ // Xterm also shows the cursor on soft reset, but does not alter the blink
+ // state.
+ this.setCursorVisible(true);
+};
+
+/**
+ * Move the cursor forward to the next tab stop, or to the last column
+ * if no more tab stops are set.
+ */
+hterm.Terminal.prototype.forwardTabStop = function() {
+ var column = this.screen_.cursorPosition.column;
+
+ for (var i = 0; i < this.tabStops_.length; i++) {
+ if (this.tabStops_[i] > column) {
+ this.setCursorColumn(this.tabStops_[i]);
+ return;
+ }
+ }
+
+ // xterm does not clear the overflow flag on HT or CHT.
+ var overflow = this.screen_.cursorPosition.overflow;
+ this.setCursorColumn(this.screenSize.width - 1);
+ this.screen_.cursorPosition.overflow = overflow;
+};
+
+/**
+ * Move the cursor backward to the previous tab stop, or to the first column
+ * if no previous tab stops are set.
+ */
+hterm.Terminal.prototype.backwardTabStop = function() {
+ var column = this.screen_.cursorPosition.column;
+
+ for (var i = this.tabStops_.length - 1; i >= 0; i--) {
+ if (this.tabStops_[i] < column) {
+ this.setCursorColumn(this.tabStops_[i]);
+ return;
+ }
+ }
+
+ this.setCursorColumn(1);
+};
+
+/**
+ * Set a tab stop at the given column.
+ *
+ * @param {integer} column Zero based column.
+ */
+hterm.Terminal.prototype.setTabStop = function(column) {
+ for (var i = this.tabStops_.length - 1; i >= 0; i--) {
+ if (this.tabStops_[i] == column)
+ return;
+
+ if (this.tabStops_[i] < column) {
+ this.tabStops_.splice(i + 1, 0, column);
+ return;
+ }
+ }
+
+ this.tabStops_.splice(0, 0, column);
+};
+
+/**
+ * Clear the tab stop at the current cursor position.
+ *
+ * No effect if there is no tab stop at the current cursor position.
+ */
+hterm.Terminal.prototype.clearTabStopAtCursor = function() {
+ var column = this.screen_.cursorPosition.column;
+
+ var i = this.tabStops_.indexOf(column);
+ if (i == -1)
+ return;
+
+ this.tabStops_.splice(i, 1);
+};
+
+/**
+ * Clear all tab stops.
+ */
+hterm.Terminal.prototype.clearAllTabStops = function() {
+ this.tabStops_.length = 0;
+ this.defaultTabStops = false;
+};
+
+/**
+ * Set up the default tab stops, starting from a given column.
+ *
+ * This sets a tabstop every (column % this.tabWidth) column, starting
+ * from the specified column, or 0 if no column is provided. It also flags
+ * future resizes to set them up.
+ *
+ * This does not clear the existing tab stops first, use clearAllTabStops
+ * for that.
+ *
+ * @param {integer} opt_start Optional starting zero based starting column, useful
+ * for filling out missing tab stops when the terminal is resized.
+ */
+hterm.Terminal.prototype.setDefaultTabStops = function(opt_start) {
+ var start = opt_start || 0;
+ var w = this.tabWidth;
+ // Round start up to a default tab stop.
+ start = start - 1 - ((start - 1) % w) + w;
+ for (var i = start; i < this.screenSize.width; i += w) {
+ this.setTabStop(i);
+ }
+
+ this.defaultTabStops = true;
+};
+
+/**
+ * Interpret a sequence of characters.
+ *
+ * Incomplete escape sequences are buffered until the next call.
+ *
+ * @param {string} str Sequence of characters to interpret or pass through.
+ */
+hterm.Terminal.prototype.interpret = function(str) {
+ this.scheduleSyncCursorPosition_();
+ this.vt.interpret(str);
+};
+
+/**
+ * Take over the given DIV for use as the terminal display.
+ *
+ * @param {HTMLDivElement} div The div to use as the terminal display.
+ */
+hterm.Terminal.prototype.decorate = function(div) {
+ const charset = div.ownerDocument.characterSet.toLowerCase();
+ if (charset != 'utf-8') {
+ console.warn(`Document encoding should be set to utf-8, not "${charset}";` +
+ ` Add <meta charset='utf-8'/> to your HTML <head> to fix.`);
+ }
+
+ this.div_ = div;
+
+ this.accessibilityReader_ = new hterm.AccessibilityReader(div);
+
+ this.scrollPort_.decorate(div, () => this.setupScrollPort_());
+};
+
+/**
+ * Initialisation of ScrollPort properties which need to be set after its DOM
+ * has been initialised.
+ * @private
+ */
+hterm.Terminal.prototype.setupScrollPort_ = function() {
+ this.scrollPort_.setBackgroundImage(this.prefs_.get('background-image'));
+ this.scrollPort_.setBackgroundSize(this.prefs_.get('background-size'));
+ this.scrollPort_.setBackgroundPosition(
+ this.prefs_.get('background-position'));
+ this.scrollPort_.setUserCssUrl(this.prefs_.get('user-css'));
+ this.scrollPort_.setUserCssText(this.prefs_.get('user-css-text'));
+ this.scrollPort_.setAccessibilityReader(this.accessibilityReader_);
+
+ this.div_.focus = this.focus.bind(this);
+
+ this.setFontSize(this.prefs_.get('font-size'));
+ this.syncFontFamily();
+
+ this.setScrollbarVisible(this.prefs_.get('scrollbar-visible'));
+ this.setScrollWheelMoveMultipler(
+ this.prefs_.get('scroll-wheel-move-multiplier'));
+
+ this.document_ = this.scrollPort_.getDocument();
+ this.accessibilityReader_.decorate(this.document_);
+
+ this.document_.body.oncontextmenu = function() { return false; };
+ this.contextMenu.setDocument(this.document_);
+
+ var onMouse = this.onMouse_.bind(this);
+ var screenNode = this.scrollPort_.getScreenNode();
+ screenNode.addEventListener('mousedown', onMouse);
+ screenNode.addEventListener('mouseup', onMouse);
+ screenNode.addEventListener('mousemove', onMouse);
+ this.scrollPort_.onScrollWheel = onMouse;
+
+ screenNode.addEventListener('keydown', this.onKeyboardActivity_.bind(this));
+
+ screenNode.addEventListener(
+ 'focus', this.onFocusChange_.bind(this, true));
+ // Listen for mousedown events on the screenNode as in FF the focus
+ // events don't bubble.
+ screenNode.addEventListener('mousedown', function() {
+ setTimeout(this.onFocusChange_.bind(this, true));
+ }.bind(this));
+
+ screenNode.addEventListener(
+ 'blur', this.onFocusChange_.bind(this, false));
+
+ var style = this.document_.createElement('style');
+ style.textContent =
+ ('.cursor-node[focus="false"] {' +
+ ' box-sizing: border-box;' +
+ ' background-color: transparent !important;' +
+ ' border-width: 2px;' +
+ ' border-style: solid;' +
+ '}' +
+ 'menu {' +
+ ' margin: 0;' +
+ ' padding: 0;' +
+ ' cursor: var(--hterm-mouse-cursor-pointer);' +
+ '}' +
+ 'menuitem {' +
+ ' white-space: nowrap;' +
+ ' border-bottom: 1px dashed;' +
+ ' display: block;' +
+ ' padding: 0.3em 0.3em 0 0.3em;' +
+ '}' +
+ 'menuitem.separator {' +
+ ' border-bottom: none;' +
+ ' height: 0.5em;' +
+ ' padding: 0;' +
+ '}' +
+ 'menuitem:hover {' +
+ ' color: var(--hterm-cursor-color);' +
+ '}' +
+ '.wc-node {' +
+ ' display: inline-block;' +
+ ' text-align: center;' +
+ ' width: calc(var(--hterm-charsize-width) * 2);' +
+ ' line-height: var(--hterm-charsize-height);' +
+ '}' +
+ ':root {' +
+ ' --hterm-charsize-width: ' + this.scrollPort_.characterSize.width + 'px;' +
+ ' --hterm-charsize-height: ' + this.scrollPort_.characterSize.height + 'px;' +
+ // Default position hides the cursor for when the window is initializing.
+ ' --hterm-cursor-offset-col: -1;' +
+ ' --hterm-cursor-offset-row: -1;' +
+ ' --hterm-blink-node-duration: 0.7s;' +
+ ' --hterm-mouse-cursor-default: default;' +
+ ' --hterm-mouse-cursor-text: text;' +
+ ' --hterm-mouse-cursor-pointer: pointer;' +
+ ' --hterm-mouse-cursor-style: var(--hterm-mouse-cursor-text);' +
+ '}' +
+ '.uri-node:hover {' +
+ ' text-decoration: underline;' +
+ ' cursor: var(--hterm-mouse-cursor-pointer);' +
+ '}' +
+ '@keyframes blink {' +
+ ' from { opacity: 1.0; }' +
+ ' to { opacity: 0.0; }' +
+ '}' +
+ '.blink-node {' +
+ ' animation-name: blink;' +
+ ' animation-duration: var(--hterm-blink-node-duration);' +
+ ' animation-iteration-count: infinite;' +
+ ' animation-timing-function: ease-in-out;' +
+ ' animation-direction: alternate;' +
+ '}');
+ // Insert this stock style as the first node so that any user styles will
+ // override w/out having to use !important everywhere. The rules above mix
+ // runtime variables with default ones designed to be overridden by the user,
+ // but we can wait for a concrete case from the users to determine the best
+ // way to split the sheet up to before & after the user-css settings.
+ this.document_.head.insertBefore(style, this.document_.head.firstChild);
+
+ this.cursorNode_ = this.document_.createElement('div');
+ this.cursorNode_.id = 'hterm:terminal-cursor';
+ this.cursorNode_.className = 'cursor-node';
+ this.cursorNode_.style.cssText =
+ ('position: absolute;' +
+ 'left: calc(var(--hterm-charsize-width) * var(--hterm-cursor-offset-col));' +
+ 'top: calc(var(--hterm-charsize-height) * var(--hterm-cursor-offset-row));' +
+ 'display: ' + (this.options_.cursorVisible ? '' : 'none') + ';' +
+ 'width: var(--hterm-charsize-width);' +
+ 'height: var(--hterm-charsize-height);' +
+ 'background-color: var(--hterm-cursor-color);' +
+ 'border-color: var(--hterm-cursor-color);' +
+ '-webkit-transition: opacity, background-color 100ms linear;' +
+ '-moz-transition: opacity, background-color 100ms linear;');
+
+ this.setCursorColor();
+ this.setCursorBlink(!!this.prefs_.get('cursor-blink'));
+ this.restyleCursor_();
+
+ this.document_.body.appendChild(this.cursorNode_);
+
+ // When 'enableMouseDragScroll' is off we reposition this element directly
+ // under the mouse cursor after a click. This makes Chrome associate
+ // subsequent mousemove events with the scroll-blocker. Since the
+ // scroll-blocker is a peer (not a child) of the scrollport, the mousemove
+ // events do not cause the scrollport to scroll.
+ //
+ // It's a hack, but it's the cleanest way I could find.
+ this.scrollBlockerNode_ = this.document_.createElement('div');
+ this.scrollBlockerNode_.id = 'hterm:mouse-drag-scroll-blocker';
+ this.scrollBlockerNode_.setAttribute('aria-hidden', 'true');
+ this.scrollBlockerNode_.style.cssText =
+ ('position: absolute;' +
+ 'top: -99px;' +
+ 'display: block;' +
+ 'width: 10px;' +
+ 'height: 10px;');
+ this.document_.body.appendChild(this.scrollBlockerNode_);
+
+ this.scrollPort_.onScrollWheel = onMouse;
+ ['mousedown', 'mouseup', 'mousemove', 'click', 'dblclick',
+ ].forEach(function(event) {
+ this.scrollBlockerNode_.addEventListener(event, onMouse);
+ this.cursorNode_.addEventListener(event, onMouse);
+ this.document_.addEventListener(event, onMouse);
+ }.bind(this));
+
+ this.cursorNode_.addEventListener('mousedown', function() {
+ setTimeout(this.focus.bind(this));
+ }.bind(this));
+
+ this.setReverseVideo(false);
+
+ this.scrollPort_.focus();
+ this.scrollPort_.scheduleRedraw();
+};
+
+/**
+ * Return the HTML document that contains the terminal DOM nodes.
+ *
+ * @return {HTMLDocument}
+ */
+hterm.Terminal.prototype.getDocument = function() {
+ return this.document_;
+};
+
+/**
+ * Focus the terminal.
+ */
+hterm.Terminal.prototype.focus = function() {
+ this.scrollPort_.focus();
+};
+
+/**
+ * Return the HTML Element for a given row index.
+ *
+ * This is a method from the RowProvider interface. The ScrollPort uses
+ * it to fetch rows on demand as they are scrolled into view.
+ *
+ * TODO(rginda): Consider saving scrollback rows as (HTML source, text content)
+ * pairs to conserve memory.
+ *
+ * @param {integer} index The zero-based row index, measured relative to the
+ * start of the scrollback buffer. On-screen rows will always have the
+ * largest indices.
+ * @return {HTMLElement} The 'x-row' element containing for the requested row.
+ */
+hterm.Terminal.prototype.getRowNode = function(index) {
+ if (index < this.scrollbackRows_.length)
+ return this.scrollbackRows_[index];
+
+ var screenIndex = index - this.scrollbackRows_.length;
+ return this.screen_.rowsArray[screenIndex];
+};
+
+/**
+ * Return the text content for a given range of rows.
+ *
+ * This is a method from the RowProvider interface. The ScrollPort uses
+ * it to fetch text content on demand when the user attempts to copy their
+ * selection to the clipboard.
+ *
+ * @param {integer} start The zero-based row index to start from, measured
+ * relative to the start of the scrollback buffer. On-screen rows will
+ * always have the largest indices.
+ * @param {integer} end The zero-based row index to end on, measured
+ * relative to the start of the scrollback buffer.
+ * @return {string} A single string containing the text value of the range of
+ * rows. Lines will be newline delimited, with no trailing newline.
+ */
+hterm.Terminal.prototype.getRowsText = function(start, end) {
+ var ary = [];
+ for (var i = start; i < end; i++) {
+ var node = this.getRowNode(i);
+ ary.push(node.textContent);
+ if (i < end - 1 && !node.getAttribute('line-overflow'))
+ ary.push('\n');
+ }
+
+ return ary.join('');
+};
+
+/**
+ * Return the text content for a given row.
+ *
+ * This is a method from the RowProvider interface. The ScrollPort uses
+ * it to fetch text content on demand when the user attempts to copy their
+ * selection to the clipboard.
+ *
+ * @param {integer} index The zero-based row index to return, measured
+ * relative to the start of the scrollback buffer. On-screen rows will
+ * always have the largest indices.
+ * @return {string} A string containing the text value of the selected row.
+ */
+hterm.Terminal.prototype.getRowText = function(index) {
+ var node = this.getRowNode(index);
+ return node.textContent;
+};
+
+/**
+ * Return the total number of rows in the addressable screen and in the
+ * scrollback buffer of this terminal.
+ *
+ * This is a method from the RowProvider interface. The ScrollPort uses
+ * it to compute the size of the scrollbar.
+ *
+ * @return {integer} The number of rows in this terminal.
+ */
+hterm.Terminal.prototype.getRowCount = function() {
+ return this.scrollbackRows_.length + this.screen_.rowsArray.length;
+};
+
+/**
+ * Create DOM nodes for new rows and append them to the end of the terminal.
+ *
+ * This is the only correct way to add a new DOM node for a row. Notice that
+ * the new row is appended to the bottom of the list of rows, and does not
+ * require renumbering (of the rowIndex property) of previous rows.
+ *
+ * If you think you want a new blank row somewhere in the middle of the
+ * terminal, look into moveRows_().
+ *
+ * This method does not pay attention to vtScrollTop/Bottom, since you should
+ * be using moveRows() in cases where they would matter.
+ *
+ * The cursor will be positioned at column 0 of the first inserted line.
+ *
+ * @param {number} count The number of rows to created.
+ */
+hterm.Terminal.prototype.appendRows_ = function(count) {
+ var cursorRow = this.screen_.rowsArray.length;
+ var offset = this.scrollbackRows_.length + cursorRow;
+ for (var i = 0; i < count; i++) {
+ var row = this.document_.createElement('x-row');
+ row.appendChild(this.document_.createTextNode(''));
+ row.rowIndex = offset + i;
+ this.screen_.pushRow(row);
+ }
+
+ var extraRows = this.screen_.rowsArray.length - this.screenSize.height;
+ if (extraRows > 0) {
+ var ary = this.screen_.shiftRows(extraRows);
+ Array.prototype.push.apply(this.scrollbackRows_, ary);
+ if (this.scrollPort_.isScrolledEnd)
+ this.scheduleScrollDown_();
+ }
+
+ if (cursorRow >= this.screen_.rowsArray.length)
+ cursorRow = this.screen_.rowsArray.length - 1;
+
+ this.setAbsoluteCursorPosition(cursorRow, 0);
+};
+
+/**
+ * Relocate rows from one part of the addressable screen to another.
+ *
+ * This is used to recycle rows during VT scrolls (those which are driven
+ * by VT commands, rather than by the user manipulating the scrollbar.)
+ *
+ * In this case, the blank lines scrolled into the scroll region are made of
+ * the nodes we scrolled off. These have their rowIndex properties carefully
+ * renumbered so as not to confuse the ScrollPort.
+ *
+ * @param {number} fromIndex The start index.
+ * @param {number} count The number of rows to move.
+ * @param {number} toIndex The destination index.
+ */
+hterm.Terminal.prototype.moveRows_ = function(fromIndex, count, toIndex) {
+ var ary = this.screen_.removeRows(fromIndex, count);
+ this.screen_.insertRows(toIndex, ary);
+
+ var start, end;
+ if (fromIndex < toIndex) {
+ start = fromIndex;
+ end = toIndex + count;
+ } else {
+ start = toIndex;
+ end = fromIndex + count;
+ }
+
+ this.renumberRows_(start, end);
+ this.scrollPort_.scheduleInvalidate();
+};
+
+/**
+ * Renumber the rowIndex property of the given range of rows.
+ *
+ * The start and end indices are relative to the screen, not the scrollback.
+ * Rows in the scrollback buffer cannot be renumbered. Since they are not
+ * addressable (you can't delete them, scroll them, etc), you should have
+ * no need to renumber scrollback rows.
+ *
+ * @param {number} start The start index.
+ * @param {number} end The end index.
+ * @param {hterm.Screen} opt_screen The screen to renumber.
+ */
+hterm.Terminal.prototype.renumberRows_ = function(start, end, opt_screen) {
+ var screen = opt_screen || this.screen_;
+
+ var offset = this.scrollbackRows_.length;
+ for (var i = start; i < end; i++) {
+ screen.rowsArray[i].rowIndex = offset + i;
+ }
+};
+
+/**
+ * Print a string to the terminal.
+ *
+ * This respects the current insert and wraparound modes. It will add new lines
+ * to the end of the terminal, scrolling off the top into the scrollback buffer
+ * if necessary.
+ *
+ * The string is *not* parsed for escape codes. Use the interpret() method if
+ * that's what you're after.
+ *
+ * @param{string} str The string to print.
+ */
+hterm.Terminal.prototype.print = function(str) {
+ this.scheduleSyncCursorPosition_();
+
+ // Basic accessibility output for the screen reader.
+ this.accessibilityReader_.announce(str);
+
+ var startOffset = 0;
+
+ var strWidth = lib.wc.strWidth(str);
+ // Fun edge case: If the string only contains zero width codepoints (like
+ // combining characters), we make sure to iterate at least once below.
+ if (strWidth == 0 && str)
+ strWidth = 1;
+
+ while (startOffset < strWidth) {
+ if (this.options_.wraparound && this.screen_.cursorPosition.overflow) {
+ this.screen_.commitLineOverflow();
+ this.newLine(true);
+ }
+
+ var count = strWidth - startOffset;
+ var didOverflow = false;
+ var substr;
+
+ if (this.screen_.cursorPosition.column + count >= this.screenSize.width) {
+ didOverflow = true;
+ count = this.screenSize.width - this.screen_.cursorPosition.column;
+ }
+
+ if (didOverflow && !this.options_.wraparound) {
+ // If the string overflowed the line but wraparound is off, then the
+ // last printed character should be the last of the string.
+ // TODO: This will add to our problems with multibyte UTF-16 characters.
+ substr = lib.wc.substr(str, startOffset, count - 1) +
+ lib.wc.substr(str, strWidth - 1);
+ count = strWidth;
+ } else {
+ substr = lib.wc.substr(str, startOffset, count);
+ }
+
+ var tokens = hterm.TextAttributes.splitWidecharString(substr);
+ for (var i = 0; i < tokens.length; i++) {
+ this.screen_.textAttributes.wcNode = tokens[i].wcNode;
+ this.screen_.textAttributes.asciiNode = tokens[i].asciiNode;
+
+ if (this.options_.insertMode) {
+ this.screen_.insertString(tokens[i].str, tokens[i].wcStrWidth);
+ } else {
+ this.screen_.overwriteString(tokens[i].str, tokens[i].wcStrWidth);
+ }
+ this.screen_.textAttributes.wcNode = false;
+ this.screen_.textAttributes.asciiNode = true;
+ }
+
+ this.screen_.maybeClipCurrentRow();
+ startOffset += count;
+ }
+
+ if (this.scrollOnOutput_)
+ this.scrollPort_.scrollRowToBottom(this.getRowCount());
+};
+
+/**
+ * Set the VT scroll region.
+ *
+ * This also resets the cursor position to the absolute (0, 0) position, since
+ * that's what xterm appears to do.
+ *
+ * Setting the scroll region to the full height of the terminal will clear
+ * the scroll region. This is *NOT* what most terminals do. We're explicitly
+ * going "off-spec" here because it makes `screen` and `tmux` overflow into the
+ * local scrollback buffer, which means the scrollbars and shift-pgup/pgdn
+ * continue to work as most users would expect.
+ *
+ * @param {integer} scrollTop The zero-based top of the scroll region.
+ * @param {integer} scrollBottom The zero-based bottom of the scroll region,
+ * inclusive.
+ */
+hterm.Terminal.prototype.setVTScrollRegion = function(scrollTop, scrollBottom) {
+ if (scrollTop == 0 && scrollBottom == this.screenSize.height - 1) {
+ this.vtScrollTop_ = null;
+ this.vtScrollBottom_ = null;
+ } else {
+ this.vtScrollTop_ = scrollTop;
+ this.vtScrollBottom_ = scrollBottom;
+ }
+};
+
+/**
+ * Return the top row index according to the VT.
+ *
+ * This will return 0 unless the terminal has been told to restrict scrolling
+ * to some lower row. It is used for some VT cursor positioning and scrolling
+ * commands.
+ *
+ * @return {integer} The topmost row in the terminal's scroll region.
+ */
+hterm.Terminal.prototype.getVTScrollTop = function() {
+ if (this.vtScrollTop_ != null)
+ return this.vtScrollTop_;
+
+ return 0;
+};
+
+/**
+ * Return the bottom row index according to the VT.
+ *
+ * This will return the height of the terminal unless the it has been told to
+ * restrict scrolling to some higher row. It is used for some VT cursor
+ * positioning and scrolling commands.
+ *
+ * @return {integer} The bottom most row in the terminal's scroll region.
+ */
+hterm.Terminal.prototype.getVTScrollBottom = function() {
+ if (this.vtScrollBottom_ != null)
+ return this.vtScrollBottom_;
+
+ return this.screenSize.height - 1;
+};
+
+/**
+ * Process a '\n' character.
+ *
+ * If the cursor is on the final row of the terminal this will append a new
+ * blank row to the screen and scroll the topmost row into the scrollback
+ * buffer.
+ *
+ * Otherwise, this moves the cursor to column zero of the next row.
+ *
+ * @param {boolean=} dueToOverflow Whether the newline is due to wraparound of
+ * the terminal.
+ */
+hterm.Terminal.prototype.newLine = function(dueToOverflow = false) {
+ if (!dueToOverflow)
+ this.accessibilityReader_.newLine();
+
+ var cursorAtEndOfScreen = (this.screen_.cursorPosition.row ==
+ this.screen_.rowsArray.length - 1);
+
+ if (this.vtScrollBottom_ != null) {
+ // A VT Scroll region is active, we never append new rows.
+ if (this.screen_.cursorPosition.row == this.vtScrollBottom_) {
+ // We're at the end of the VT Scroll Region, perform a VT scroll.
+ this.vtScrollUp(1);
+ this.setAbsoluteCursorPosition(this.screen_.cursorPosition.row, 0);
+ } else if (cursorAtEndOfScreen) {
+ // We're at the end of the screen, the only thing to do is put the
+ // cursor to column 0.
+ this.setAbsoluteCursorPosition(this.screen_.cursorPosition.row, 0);
+ } else {
+ // Anywhere else, advance the cursor row, and reset the column.
+ this.setAbsoluteCursorPosition(this.screen_.cursorPosition.row + 1, 0);
+ }
+ } else if (cursorAtEndOfScreen) {
+ // We're at the end of the screen. Append a new row to the terminal,
+ // shifting the top row into the scrollback.
+ this.appendRows_(1);
+ } else {
+ // Anywhere else in the screen just moves the cursor.
+ this.setAbsoluteCursorPosition(this.screen_.cursorPosition.row + 1, 0);
+ }
+};
+
+/**
+ * Like newLine(), except maintain the cursor column.
+ */
+hterm.Terminal.prototype.lineFeed = function() {
+ var column = this.screen_.cursorPosition.column;
+ this.newLine();
+ this.setCursorColumn(column);
+};
+
+/**
+ * If autoCarriageReturn is set then newLine(), else lineFeed().
+ */
+hterm.Terminal.prototype.formFeed = function() {
+ if (this.options_.autoCarriageReturn) {
+ this.newLine();
+ } else {
+ this.lineFeed();
+ }
+};
+
+/**
+ * Move the cursor up one row, possibly inserting a blank line.
+ *
+ * The cursor column is not changed.
+ */
+hterm.Terminal.prototype.reverseLineFeed = function() {
+ var scrollTop = this.getVTScrollTop();
+ var currentRow = this.screen_.cursorPosition.row;
+
+ if (currentRow == scrollTop) {
+ this.insertLines(1);
+ } else {
+ this.setAbsoluteCursorRow(currentRow - 1);
+ }
+};
+
+/**
+ * Replace all characters to the left of the current cursor with the space
+ * character.
+ *
+ * TODO(rginda): This should probably *remove* the characters (not just replace
+ * with a space) if there are no characters at or beyond the current cursor
+ * position.
+ */
+hterm.Terminal.prototype.eraseToLeft = function() {
+ var cursor = this.saveCursor();
+ this.setCursorColumn(0);
+ const count = cursor.column + 1;
+ this.screen_.overwriteString(lib.f.getWhitespace(count), count);
+ this.restoreCursor(cursor);
+};
+
+/**
+ * Erase a given number of characters to the right of the cursor.
+ *
+ * The cursor position is unchanged.
+ *
+ * If the current background color is not the default background color this
+ * will insert spaces rather than delete. This is unfortunate because the
+ * trailing space will affect text selection, but it's difficult to come up
+ * with a way to style empty space that wouldn't trip up the hterm.Screen
+ * code.
+ *
+ * eraseToRight is ignored in the presence of a cursor overflow. This deviates
+ * from xterm, but agrees with gnome-terminal and konsole, xfce4-terminal. See
+ * crbug.com/232390 for details.
+ *
+ * @param {number} opt_count The number of characters to erase.
+ */
+hterm.Terminal.prototype.eraseToRight = function(opt_count) {
+ if (this.screen_.cursorPosition.overflow)
+ return;
+
+ var maxCount = this.screenSize.width - this.screen_.cursorPosition.column;
+ var count = opt_count ? Math.min(opt_count, maxCount) : maxCount;
+
+ if (this.screen_.textAttributes.background ===
+ this.screen_.textAttributes.DEFAULT_COLOR) {
+ var cursorRow = this.screen_.rowsArray[this.screen_.cursorPosition.row];
+ if (hterm.TextAttributes.nodeWidth(cursorRow) <=
+ this.screen_.cursorPosition.column + count) {
+ this.screen_.deleteChars(count);
+ this.clearCursorOverflow();
+ return;
+ }
+ }
+
+ var cursor = this.saveCursor();
+ this.screen_.overwriteString(lib.f.getWhitespace(count), count);
+ this.restoreCursor(cursor);
+ this.clearCursorOverflow();
+};
+
+/**
+ * Erase the current line.
+ *
+ * The cursor position is unchanged.
+ */
+hterm.Terminal.prototype.eraseLine = function() {
+ var cursor = this.saveCursor();
+ this.screen_.clearCursorRow();
+ this.restoreCursor(cursor);
+ this.clearCursorOverflow();
+};
+
+/**
+ * Erase all characters from the start of the screen to the current cursor
+ * position, regardless of scroll region.
+ *
+ * The cursor position is unchanged.
+ */
+hterm.Terminal.prototype.eraseAbove = function() {
+ var cursor = this.saveCursor();
+
+ this.eraseToLeft();
+
+ for (var i = 0; i < cursor.row; i++) {
+ this.setAbsoluteCursorPosition(i, 0);
+ this.screen_.clearCursorRow();
+ }
+
+ this.restoreCursor(cursor);
+ this.clearCursorOverflow();
+};
+
+/**
+ * Erase all characters from the current cursor position to the end of the
+ * screen, regardless of scroll region.
+ *
+ * The cursor position is unchanged.
+ */
+hterm.Terminal.prototype.eraseBelow = function() {
+ var cursor = this.saveCursor();
+
+ this.eraseToRight();
+
+ var bottom = this.screenSize.height - 1;
+ for (var i = cursor.row + 1; i <= bottom; i++) {
+ this.setAbsoluteCursorPosition(i, 0);
+ this.screen_.clearCursorRow();
+ }
+
+ this.restoreCursor(cursor);
+ this.clearCursorOverflow();
+};
+
+/**
+ * Fill the terminal with a given character.
+ *
+ * This methods does not respect the VT scroll region.
+ *
+ * @param {string} ch The character to use for the fill.
+ */
+hterm.Terminal.prototype.fill = function(ch) {
+ var cursor = this.saveCursor();
+
+ this.setAbsoluteCursorPosition(0, 0);
+ for (var row = 0; row < this.screenSize.height; row++) {
+ for (var col = 0; col < this.screenSize.width; col++) {
+ this.setAbsoluteCursorPosition(row, col);
+ this.screen_.overwriteString(ch, 1);
+ }
+ }
+
+ this.restoreCursor(cursor);
+};
+
+/**
+ * Erase the entire display and leave the cursor at (0, 0).
+ *
+ * This does not respect the scroll region.
+ *
+ * @param {hterm.Screen} opt_screen Optional screen to operate on. Defaults
+ * to the current screen.
+ */
+hterm.Terminal.prototype.clearHome = function(opt_screen) {
+ var screen = opt_screen || this.screen_;
+ var bottom = screen.getHeight();
+
+ this.accessibilityReader_.clear();
+
+ if (bottom == 0) {
+ // Empty screen, nothing to do.
+ return;
+ }
+
+ for (var i = 0; i < bottom; i++) {
+ screen.setCursorPosition(i, 0);
+ screen.clearCursorRow();
+ }
+
+ screen.setCursorPosition(0, 0);
+};
+
+/**
+ * Erase the entire display without changing the cursor position.
+ *
+ * The cursor position is unchanged. This does not respect the scroll
+ * region.
+ *
+ * @param {hterm.Screen} opt_screen Optional screen to operate on. Defaults
+ * to the current screen.
+ */
+hterm.Terminal.prototype.clear = function(opt_screen) {
+ var screen = opt_screen || this.screen_;
+ var cursor = screen.cursorPosition.clone();
+ this.clearHome(screen);
+ screen.setCursorPosition(cursor.row, cursor.column);
+};
+
+/**
+ * VT command to insert lines at the current cursor row.
+ *
+ * This respects the current scroll region. Rows pushed off the bottom are
+ * lost (they won't show up in the scrollback buffer).
+ *
+ * @param {integer} count The number of lines to insert.
+ */
+hterm.Terminal.prototype.insertLines = function(count) {
+ var cursorRow = this.screen_.cursorPosition.row;
+
+ var bottom = this.getVTScrollBottom();
+ count = Math.min(count, bottom - cursorRow);
+
+ // The moveCount is the number of rows we need to relocate to make room for
+ // the new row(s). The count is the distance to move them.
+ var moveCount = bottom - cursorRow - count + 1;
+ if (moveCount)
+ this.moveRows_(cursorRow, moveCount, cursorRow + count);
+
+ for (var i = count - 1; i >= 0; i--) {
+ this.setAbsoluteCursorPosition(cursorRow + i, 0);
+ this.screen_.clearCursorRow();
+ }
+};
+
+/**
+ * VT command to delete lines at the current cursor row.
+ *
+ * New rows are added to the bottom of scroll region to take their place. New
+ * rows are strictly there to take up space and have no content or style.
+ *
+ * @param {number} count The number of lines to delete.
+ */
+hterm.Terminal.prototype.deleteLines = function(count) {
+ var cursor = this.saveCursor();
+
+ var top = cursor.row;
+ var bottom = this.getVTScrollBottom();
+
+ var maxCount = bottom - top + 1;
+ count = Math.min(count, maxCount);
+
+ var moveStart = bottom - count + 1;
+ if (count != maxCount)
+ this.moveRows_(top, count, moveStart);
+
+ for (var i = 0; i < count; i++) {
+ this.setAbsoluteCursorPosition(moveStart + i, 0);
+ this.screen_.clearCursorRow();
+ }
+
+ this.restoreCursor(cursor);
+ this.clearCursorOverflow();
+};
+
+/**
+ * Inserts the given number of spaces at the current cursor position.
+ *
+ * The cursor position is not changed.
+ *
+ * @param {number} count The number of spaces to insert.
+ */
+hterm.Terminal.prototype.insertSpace = function(count) {
+ var cursor = this.saveCursor();
+
+ var ws = lib.f.getWhitespace(count || 1);
+ this.screen_.insertString(ws, ws.length);
+ this.screen_.maybeClipCurrentRow();
+
+ this.restoreCursor(cursor);
+ this.clearCursorOverflow();
+};
+
+/**
+ * Forward-delete the specified number of characters starting at the cursor
+ * position.
+ *
+ * @param {integer} count The number of characters to delete.
+ */
+hterm.Terminal.prototype.deleteChars = function(count) {
+ var deleted = this.screen_.deleteChars(count);
+ if (deleted && !this.screen_.textAttributes.isDefault()) {
+ var cursor = this.saveCursor();
+ this.setCursorColumn(this.screenSize.width - deleted);
+ this.screen_.insertString(lib.f.getWhitespace(deleted));
+ this.restoreCursor(cursor);
+ }
+
+ this.clearCursorOverflow();
+};
+
+/**
+ * Shift rows in the scroll region upwards by a given number of lines.
+ *
+ * New rows are inserted at the bottom of the scroll region to fill the
+ * vacated rows. The new rows not filled out with the current text attributes.
+ *
+ * This function does not affect the scrollback rows at all. Rows shifted
+ * off the top are lost.
+ *
+ * The cursor position is not altered.
+ *
+ * @param {integer} count The number of rows to scroll.
+ */
+hterm.Terminal.prototype.vtScrollUp = function(count) {
+ var cursor = this.saveCursor();
+
+ this.setAbsoluteCursorRow(this.getVTScrollTop());
+ this.deleteLines(count);
+
+ this.restoreCursor(cursor);
+};
+
+/**
+ * Shift rows below the cursor down by a given number of lines.
+ *
+ * This function respects the current scroll region.
+ *
+ * New rows are inserted at the top of the scroll region to fill the
+ * vacated rows. The new rows not filled out with the current text attributes.
+ *
+ * This function does not affect the scrollback rows at all. Rows shifted
+ * off the bottom are lost.
+ *
+ * @param {integer} count The number of rows to scroll.
+ */
+hterm.Terminal.prototype.vtScrollDown = function(opt_count) {
+ var cursor = this.saveCursor();
+
+ this.setAbsoluteCursorPosition(this.getVTScrollTop(), 0);
+ this.insertLines(opt_count);
+
+ this.restoreCursor(cursor);
+};
+
+/**
+ * Enable accessibility-friendly features that have a performance impact.
+ *
+ * This will generate additional DOM nodes in an aria-live region that will
+ * cause Assitive Technology to announce the output of the terminal. It also
+ * enables other features that aid assistive technology. All the features gated
+ * behind this flag have a performance impact on the terminal which is why they
+ * are made optional.
+ *
+ * @param {boolean} enabled Whether to enable accessibility-friendly features.
+ */
+hterm.Terminal.prototype.setAccessibilityEnabled = function(enabled) {
+ this.accessibilityReader_.setAccessibilityEnabled(enabled);
+};
+
+/**
+ * Set the cursor position.
+ *
+ * The cursor row is relative to the scroll region if the terminal has
+ * 'origin mode' enabled, or relative to the addressable screen otherwise.
+ *
+ * @param {integer} row The new zero-based cursor row.
+ * @param {integer} row The new zero-based cursor column.
+ */
+hterm.Terminal.prototype.setCursorPosition = function(row, column) {
+ if (this.options_.originMode) {
+ this.setRelativeCursorPosition(row, column);
+ } else {
+ this.setAbsoluteCursorPosition(row, column);
+ }
+};
+
+/**
+ * Move the cursor relative to its current position.
+ *
+ * @param {number} row
+ * @param {number} column
+ */
+hterm.Terminal.prototype.setRelativeCursorPosition = function(row, column) {
+ var scrollTop = this.getVTScrollTop();
+ row = lib.f.clamp(row + scrollTop, scrollTop, this.getVTScrollBottom());
+ column = lib.f.clamp(column, 0, this.screenSize.width - 1);
+ this.screen_.setCursorPosition(row, column);
+};
+
+/**
+ * Move the cursor to the specified position.
+ *
+ * @param {number} row
+ * @param {number} column
+ */
+hterm.Terminal.prototype.setAbsoluteCursorPosition = function(row, column) {
+ row = lib.f.clamp(row, 0, this.screenSize.height - 1);
+ column = lib.f.clamp(column, 0, this.screenSize.width - 1);
+ this.screen_.setCursorPosition(row, column);
+};
+
+/**
+ * Set the cursor column.
+ *
+ * @param {integer} column The new zero-based cursor column.
+ */
+hterm.Terminal.prototype.setCursorColumn = function(column) {
+ this.setAbsoluteCursorPosition(this.screen_.cursorPosition.row, column);
+};
+
+/**
+ * Return the cursor column.
+ *
+ * @return {integer} The zero-based cursor column.
+ */
+hterm.Terminal.prototype.getCursorColumn = function() {
+ return this.screen_.cursorPosition.column;
+};
+
+/**
+ * Set the cursor row.
+ *
+ * The cursor row is relative to the scroll region if the terminal has
+ * 'origin mode' enabled, or relative to the addressable screen otherwise.
+ *
+ * @param {integer} row The new cursor row.
+ */
+hterm.Terminal.prototype.setAbsoluteCursorRow = function(row) {
+ this.setAbsoluteCursorPosition(row, this.screen_.cursorPosition.column);
+};
+
+/**
+ * Return the cursor row.
+ *
+ * @return {integer} The zero-based cursor row.
+ */
+hterm.Terminal.prototype.getCursorRow = function() {
+ return this.screen_.cursorPosition.row;
+};
+
+/**
+ * Request that the ScrollPort redraw itself soon.
+ *
+ * The redraw will happen asynchronously, soon after the call stack winds down.
+ * Multiple calls will be coalesced into a single redraw.
+ */
+hterm.Terminal.prototype.scheduleRedraw_ = function() {
+ if (this.timeouts_.redraw)
+ return;
+
+ var self = this;
+ this.timeouts_.redraw = setTimeout(function() {
+ delete self.timeouts_.redraw;
+ self.scrollPort_.redraw_();
+ }, 0);
+};
+
+/**
+ * Request that the ScrollPort be scrolled to the bottom.
+ *
+ * The scroll will happen asynchronously, soon after the call stack winds down.
+ * Multiple calls will be coalesced into a single scroll.
+ *
+ * This affects the scrollbar position of the ScrollPort, and has nothing to
+ * do with the VT scroll commands.
+ */
+hterm.Terminal.prototype.scheduleScrollDown_ = function() {
+ if (this.timeouts_.scrollDown)
+ return;
+
+ var self = this;
+ this.timeouts_.scrollDown = setTimeout(function() {
+ delete self.timeouts_.scrollDown;
+ self.scrollPort_.scrollRowToBottom(self.getRowCount());
+ }, 10);
+};
+
+/**
+ * Move the cursor up a specified number of rows.
+ *
+ * @param {integer} count The number of rows to move the cursor.
+ */
+hterm.Terminal.prototype.cursorUp = function(count) {
+ return this.cursorDown(-(count || 1));
+};
+
+/**
+ * Move the cursor down a specified number of rows.
+ *
+ * @param {integer} count The number of rows to move the cursor.
+ */
+hterm.Terminal.prototype.cursorDown = function(count) {
+ count = count || 1;
+ var minHeight = (this.options_.originMode ? this.getVTScrollTop() : 0);
+ var maxHeight = (this.options_.originMode ? this.getVTScrollBottom() :
+ this.screenSize.height - 1);
+
+ var row = lib.f.clamp(this.screen_.cursorPosition.row + count,
+ minHeight, maxHeight);
+ this.setAbsoluteCursorRow(row);
+};
+
+/**
+ * Move the cursor left a specified number of columns.
+ *
+ * If reverse wraparound mode is enabled and the previous row wrapped into
+ * the current row then we back up through the wraparound as well.
+ *
+ * @param {integer} count The number of columns to move the cursor.
+ */
+hterm.Terminal.prototype.cursorLeft = function(count) {
+ count = count || 1;
+
+ if (count < 1)
+ return;
+
+ var currentColumn = this.screen_.cursorPosition.column;
+ if (this.options_.reverseWraparound) {
+ if (this.screen_.cursorPosition.overflow) {
+ // If this cursor is in the right margin, consume one count to get it
+ // back to the last column. This only applies when we're in reverse
+ // wraparound mode.
+ count--;
+ this.clearCursorOverflow();
+
+ if (!count)
+ return;
+ }
+
+ var newRow = this.screen_.cursorPosition.row;
+ var newColumn = currentColumn - count;
+ if (newColumn < 0) {
+ newRow = newRow - Math.floor(count / this.screenSize.width) - 1;
+ if (newRow < 0) {
+ // xterm also wraps from row 0 to the last row.
+ newRow = this.screenSize.height + newRow % this.screenSize.height;
+ }
+ newColumn = this.screenSize.width + newColumn % this.screenSize.width;
+ }
+
+ this.setCursorPosition(Math.max(newRow, 0), newColumn);
+
+ } else {
+ var newColumn = Math.max(currentColumn - count, 0);
+ this.setCursorColumn(newColumn);
+ }
+};
+
+/**
+ * Move the cursor right a specified number of columns.
+ *
+ * @param {integer} count The number of columns to move the cursor.
+ */
+hterm.Terminal.prototype.cursorRight = function(count) {
+ count = count || 1;
+
+ if (count < 1)
+ return;
+
+ var column = lib.f.clamp(this.screen_.cursorPosition.column + count,
+ 0, this.screenSize.width - 1);
+ this.setCursorColumn(column);
+};
+
+/**
+ * Reverse the foreground and background colors of the terminal.
+ *
+ * This only affects text that was drawn with no attributes.
+ *
+ * TODO(rginda): Test xterm to see if reverse is respected for text that has
+ * been drawn with attributes that happen to coincide with the default
+ * 'no-attribute' colors. My guess is probably not.
+ *
+ * @param {boolean} state The state to set.
+ */
+hterm.Terminal.prototype.setReverseVideo = function(state) {
+ this.options_.reverseVideo = state;
+ if (state) {
+ this.scrollPort_.setForegroundColor(this.prefs_.get('background-color'));
+ this.scrollPort_.setBackgroundColor(this.prefs_.get('foreground-color'));
+ } else {
+ this.scrollPort_.setForegroundColor(this.prefs_.get('foreground-color'));
+ this.scrollPort_.setBackgroundColor(this.prefs_.get('background-color'));
+ }
+};
+
+/**
+ * Ring the terminal bell.
+ *
+ * This will not play the bell audio more than once per second.
+ */
+hterm.Terminal.prototype.ringBell = function() {
+ this.cursorNode_.style.backgroundColor =
+ this.scrollPort_.getForegroundColor();
+
+ var self = this;
+ setTimeout(function() {
+ self.restyleCursor_();
+ }, 200);
+
+ // bellSquelchTimeout_ affects both audio and notification bells.
+ if (this.bellSquelchTimeout_)
+ return;
+
+ if (this.bellAudio_.getAttribute('src')) {
+ this.bellAudio_.play();
+ this.bellSequelchTimeout_ = setTimeout(function() {
+ delete this.bellSquelchTimeout_;
+ }.bind(this), 500);
+ } else {
+ delete this.bellSquelchTimeout_;
+ }
+
+ if (this.desktopNotificationBell_ && !this.document_.hasFocus()) {
+ var n = hterm.notify();
+ this.bellNotificationList_.push(n);
+ // TODO: Should we try to raise the window here?
+ n.onclick = function() { self.closeBellNotifications_(); };
+ }
+};
+
+/**
+ * Set the origin mode bit.
+ *
+ * If origin mode is on, certain VT cursor and scrolling commands measure their
+ * row parameter relative to the VT scroll region. Otherwise, row 0 corresponds
+ * to the top of the addressable screen.
+ *
+ * Defaults to off.
+ *
+ * @param {boolean} state True to set origin mode, false to unset.
+ */
+hterm.Terminal.prototype.setOriginMode = function(state) {
+ this.options_.originMode = state;
+ this.setCursorPosition(0, 0);
+};
+
+/**
+ * Set the insert mode bit.
+ *
+ * If insert mode is on, existing text beyond the cursor position will be
+ * shifted right to make room for new text. Otherwise, new text overwrites
+ * any existing text.
+ *
+ * Defaults to off.
+ *
+ * @param {boolean} state True to set insert mode, false to unset.
+ */
+hterm.Terminal.prototype.setInsertMode = function(state) {
+ this.options_.insertMode = state;
+};
+
+/**
+ * Set the auto carriage return bit.
+ *
+ * If auto carriage return is on then a formfeed character is interpreted
+ * as a newline, otherwise it's the same as a linefeed. The difference boils
+ * down to whether or not the cursor column is reset.
+ *
+ * @param {boolean} state The state to set.
+ */
+hterm.Terminal.prototype.setAutoCarriageReturn = function(state) {
+ this.options_.autoCarriageReturn = state;
+};
+
+/**
+ * Set the wraparound mode bit.
+ *
+ * If wraparound mode is on, certain VT commands will allow the cursor to wrap
+ * to the start of the following row. Otherwise, the cursor is clamped to the
+ * end of the screen and attempts to write past it are ignored.
+ *
+ * Defaults to on.
+ *
+ * @param {boolean} state True to set wraparound mode, false to unset.
+ */
+hterm.Terminal.prototype.setWraparound = function(state) {
+ this.options_.wraparound = state;
+};
+
+/**
+ * Set the reverse-wraparound mode bit.
+ *
+ * If wraparound mode is off, certain VT commands will allow the cursor to wrap
+ * to the end of the previous row. Otherwise, the cursor is clamped to column
+ * 0.
+ *
+ * Defaults to off.
+ *
+ * @param {boolean} state True to set reverse-wraparound mode, false to unset.
+ */
+hterm.Terminal.prototype.setReverseWraparound = function(state) {
+ this.options_.reverseWraparound = state;
+};
+
+/**
+ * Selects between the primary and alternate screens.
+ *
+ * If alternate mode is on, the alternate screen is active. Otherwise the
+ * primary screen is active.
+ *
+ * Swapping screens has no effect on the scrollback buffer.
+ *
+ * Each screen maintains its own cursor position.
+ *
+ * Defaults to off.
+ *
+ * @param {boolean} state True to set alternate mode, false to unset.
+ */
+hterm.Terminal.prototype.setAlternateMode = function(state) {
+ var cursor = this.saveCursor();
+ this.screen_ = state ? this.alternateScreen_ : this.primaryScreen_;
+
+ if (this.screen_.rowsArray.length &&
+ this.screen_.rowsArray[0].rowIndex != this.scrollbackRows_.length) {
+ // If the screen changed sizes while we were away, our rowIndexes may
+ // be incorrect.
+ var offset = this.scrollbackRows_.length;
+ var ary = this.screen_.rowsArray;
+ for (var i = 0; i < ary.length; i++) {
+ ary[i].rowIndex = offset + i;
+ }
+ }
+
+ this.realizeWidth_(this.screenSize.width);
+ this.realizeHeight_(this.screenSize.height);
+ this.scrollPort_.syncScrollHeight();
+ this.scrollPort_.invalidate();
+
+ this.restoreCursor(cursor);
+ this.scrollPort_.resize();
+};
+
+/**
+ * Set the cursor-blink mode bit.
+ *
+ * If cursor-blink is on, the cursor will blink when it is visible. Otherwise
+ * a visible cursor does not blink.
+ *
+ * You should make sure to turn blinking off if you're going to dispose of a
+ * terminal, otherwise you'll leak a timeout.
+ *
+ * Defaults to on.
+ *
+ * @param {boolean} state True to set cursor-blink mode, false to unset.
+ */
+hterm.Terminal.prototype.setCursorBlink = function(state) {
+ this.options_.cursorBlink = state;
+
+ if (!state && this.timeouts_.cursorBlink) {
+ clearTimeout(this.timeouts_.cursorBlink);
+ delete this.timeouts_.cursorBlink;
+ }
+
+ if (this.options_.cursorVisible)
+ this.setCursorVisible(true);
+};
+
+/**
+ * Set the cursor-visible mode bit.
+ *
+ * If cursor-visible is on, the cursor will be visible. Otherwise it will not.
+ *
+ * Defaults to on.
+ *
+ * @param {boolean} state True to set cursor-visible mode, false to unset.
+ */
+hterm.Terminal.prototype.setCursorVisible = function(state) {
+ this.options_.cursorVisible = state;
+
+ if (!state) {
+ if (this.timeouts_.cursorBlink) {
+ clearTimeout(this.timeouts_.cursorBlink);
+ delete this.timeouts_.cursorBlink;
+ }
+ this.cursorNode_.style.opacity = '0';
+ return;
+ }
+
+ this.syncCursorPosition_();
+
+ this.cursorNode_.style.opacity = '1';
+
+ if (this.options_.cursorBlink) {
+ if (this.timeouts_.cursorBlink)
+ return;
+
+ this.onCursorBlink_();
+ } else {
+ if (this.timeouts_.cursorBlink) {
+ clearTimeout(this.timeouts_.cursorBlink);
+ delete this.timeouts_.cursorBlink;
+ }
+ }
+};
+
+/**
+ * Synchronizes the visible cursor and document selection with the current
+ * cursor coordinates.
+ *
+ * @return {boolean} True if the cursor is onscreen and synced.
+ */
+hterm.Terminal.prototype.syncCursorPosition_ = function() {
+ var topRowIndex = this.scrollPort_.getTopRowIndex();
+ var bottomRowIndex = this.scrollPort_.getBottomRowIndex(topRowIndex);
+ var cursorRowIndex = this.scrollbackRows_.length +
+ this.screen_.cursorPosition.row;
+
+ let forceSyncSelection = false;
+ if (this.accessibilityReader_.accessibilityEnabled) {
+ // Report the new position of the cursor for accessibility purposes.
+ const cursorColumnIndex = this.screen_.cursorPosition.column;
+ const cursorLineText =
+ this.screen_.rowsArray[this.screen_.cursorPosition.row].innerText;
+ // This will force the selection to be sync'd to the cursor position if the
+ // user has pressed a key. Generally we would only sync the cursor position
+ // when selection is collapsed so that if the user has selected something
+ // we don't clear the selection by moving the selection. However when a
+ // screen reader is used, it's intuitive for entering a key to move the
+ // selection to the cursor.
+ forceSyncSelection = this.accessibilityReader_.hasUserGesture;
+ this.accessibilityReader_.afterCursorChange(
+ cursorLineText, cursorRowIndex, cursorColumnIndex);
+ }
+
+ if (cursorRowIndex > bottomRowIndex) {
+ // Cursor is scrolled off screen, move it outside of the visible area.
+ this.setCssVar('cursor-offset-row', '-1');
+ return false;
+ }
+
+ if (this.options_.cursorVisible &&
+ this.cursorNode_.style.display == 'none') {
+ // Re-display the terminal cursor if it was hidden by the mouse cursor.
+ this.cursorNode_.style.display = '';
+ }
+
+ // Position the cursor using CSS variable math. If we do the math in JS,
+ // the float math will end up being more precise than the CSS which will
+ // cause the cursor tracking to be off.
+ this.setCssVar(
+ 'cursor-offset-row',
+ `${cursorRowIndex - topRowIndex} + ` +
+ `${this.scrollPort_.visibleRowTopMargin}px`);
+ this.setCssVar('cursor-offset-col', this.screen_.cursorPosition.column);
+
+ this.cursorNode_.setAttribute('title',
+ '(' + this.screen_.cursorPosition.column +
+ ', ' + this.screen_.cursorPosition.row +
+ ')');
+
+ // Update the caret for a11y purposes.
+ var selection = this.document_.getSelection();
+ if (selection && (selection.isCollapsed || forceSyncSelection)) {
+ this.screen_.syncSelectionCaret(selection);
+ }
+ return true;
+};
+
+/**
+ * Adjusts the style of this.cursorNode_ according to the current cursor shape
+ * and character cell dimensions.
+ */
+hterm.Terminal.prototype.restyleCursor_ = function() {
+ var shape = this.cursorShape_;
+
+ if (this.cursorNode_.getAttribute('focus') == 'false') {
+ // Always show a block cursor when unfocused.
+ shape = hterm.Terminal.cursorShape.BLOCK;
+ }
+
+ var style = this.cursorNode_.style;
+
+ switch (shape) {
+ case hterm.Terminal.cursorShape.BEAM:
+ style.height = 'var(--hterm-charsize-height)';
+ style.backgroundColor = 'transparent';
+ style.borderBottomStyle = null;
+ style.borderLeftStyle = 'solid';
+ break;
+
+ case hterm.Terminal.cursorShape.UNDERLINE:
+ style.height = this.scrollPort_.characterSize.baseline + 'px';
+ style.backgroundColor = 'transparent';
+ style.borderBottomStyle = 'solid';
+ // correct the size to put it exactly at the baseline
+ style.borderLeftStyle = null;
+ break;
+
+ default:
+ style.height = 'var(--hterm-charsize-height)';
+ style.backgroundColor = 'var(--hterm-cursor-color)';
+ style.borderBottomStyle = null;
+ style.borderLeftStyle = null;
+ break;
+ }
+};
+
+/**
+ * Synchronizes the visible cursor with the current cursor coordinates.
+ *
+ * The sync will happen asynchronously, soon after the call stack winds down.
+ * Multiple calls will be coalesced into a single sync. This should be called
+ * prior to the cursor actually changing position.
+ */
+hterm.Terminal.prototype.scheduleSyncCursorPosition_ = function() {
+ if (this.timeouts_.syncCursor)
+ return;
+
+ if (this.accessibilityReader_.accessibilityEnabled) {
+ // Report the previous position of the cursor for accessibility purposes.
+ const cursorRowIndex = this.scrollbackRows_.length +
+ this.screen_.cursorPosition.row;
+ const cursorColumnIndex = this.screen_.cursorPosition.column;
+ const cursorLineText =
+ this.screen_.rowsArray[this.screen_.cursorPosition.row].innerText;
+ this.accessibilityReader_.beforeCursorChange(
+ cursorLineText, cursorRowIndex, cursorColumnIndex);
+ }
+
+ var self = this;
+ this.timeouts_.syncCursor = setTimeout(function() {
+ self.syncCursorPosition_();
+ delete self.timeouts_.syncCursor;
+ }, 0);
+};
+
+/**
+ * Show or hide the zoom warning.
+ *
+ * The zoom warning is a message warning the user that their browser zoom must
+ * be set to 100% in order for hterm to function properly.
+ *
+ * @param {boolean} state True to show the message, false to hide it.
+ */
+hterm.Terminal.prototype.showZoomWarning_ = function(state) {
+ if (!this.zoomWarningNode_) {
+ if (!state)
+ return;
+
+ this.zoomWarningNode_ = this.document_.createElement('div');
+ this.zoomWarningNode_.id = 'hterm:zoom-warning';
+ this.zoomWarningNode_.style.cssText = (
+ 'color: black;' +
+ 'background-color: #ff2222;' +
+ 'font-size: large;' +
+ 'border-radius: 8px;' +
+ 'opacity: 0.75;' +
+ 'padding: 0.2em 0.5em 0.2em 0.5em;' +
+ 'top: 0.5em;' +
+ 'right: 1.2em;' +
+ 'position: absolute;' +
+ '-webkit-text-size-adjust: none;' +
+ '-webkit-user-select: none;' +
+ '-moz-text-size-adjust: none;' +
+ '-moz-user-select: none;');
+
+ this.zoomWarningNode_.addEventListener('click', function(e) {
+ this.parentNode.removeChild(this);
+ });
+ }
+
+ this.zoomWarningNode_.textContent = lib.MessageManager.replaceReferences(
+ hterm.zoomWarningMessage,
+ [parseInt(this.scrollPort_.characterSize.zoomFactor * 100)]);
+
+ this.zoomWarningNode_.style.fontFamily = this.prefs_.get('font-family');
+
+ if (state) {
+ if (!this.zoomWarningNode_.parentNode)
+ this.div_.parentNode.appendChild(this.zoomWarningNode_);
+ } else if (this.zoomWarningNode_.parentNode) {
+ this.zoomWarningNode_.parentNode.removeChild(this.zoomWarningNode_);
+ }
+};
+
+/**
+ * Show the terminal overlay for a given amount of time.
+ *
+ * The terminal overlay appears in inverse video in a large font, centered
+ * over the terminal. You should probably keep the overlay message brief,
+ * since it's in a large font and you probably aren't going to check the size
+ * of the terminal first.
+ *
+ * @param {string} msg The text (not HTML) message to display in the overlay.
+ * @param {number} opt_timeout The amount of time to wait before fading out
+ * the overlay. Defaults to 1.5 seconds. Pass null to have the overlay
+ * stay up forever (or until the next overlay).
+ */
+hterm.Terminal.prototype.showOverlay = function(msg, opt_timeout) {
+ if (!this.overlayNode_) {
+ if (!this.div_)
+ return;
+
+ this.overlayNode_ = this.document_.createElement('div');
+ this.overlayNode_.style.cssText = (
+ 'border-radius: 15px;' +
+ 'font-size: xx-large;' +
+ 'opacity: 0.75;' +
+ 'padding: 0.2em 0.5em 0.2em 0.5em;' +
+ 'position: absolute;' +
+ '-webkit-user-select: none;' +
+ '-webkit-transition: opacity 180ms ease-in;' +
+ '-moz-user-select: none;' +
+ '-moz-transition: opacity 180ms ease-in;');
+
+ this.overlayNode_.addEventListener('mousedown', function(e) {
+ e.preventDefault();
+ e.stopPropagation();
+ }, true);
+ }
+
+ this.overlayNode_.style.color = this.prefs_.get('background-color');
+ this.overlayNode_.style.backgroundColor = this.prefs_.get('foreground-color');
+ this.overlayNode_.style.fontFamily = this.prefs_.get('font-family');
+
+ this.overlayNode_.textContent = msg;
+ this.overlayNode_.style.opacity = '0.75';
+
+ if (!this.overlayNode_.parentNode)
+ this.div_.appendChild(this.overlayNode_);
+
+ var divSize = hterm.getClientSize(this.div_);
+ var overlaySize = hterm.getClientSize(this.overlayNode_);
+
+ this.overlayNode_.style.top =
+ (divSize.height - overlaySize.height) / 2 + 'px';
+ this.overlayNode_.style.left = (divSize.width - overlaySize.width -
+ this.scrollPort_.currentScrollbarWidthPx) / 2 + 'px';
+
+ if (this.overlayTimeout_)
+ clearTimeout(this.overlayTimeout_);
+
+ this.accessibilityReader_.assertiveAnnounce(msg);
+
+ if (opt_timeout === null)
+ return;
+
+ this.overlayTimeout_ = setTimeout(() => {
+ this.overlayNode_.style.opacity = '0';
+ this.overlayTimeout_ = setTimeout(() => this.hideOverlay(), 200);
+ }, opt_timeout || 1500);
+};
+
+/**
+ * Hide the terminal overlay immediately.
+ *
+ * Useful when we show an overlay for an event with an unknown end time.
+ */
+hterm.Terminal.prototype.hideOverlay = function() {
+ if (this.overlayTimeout_)
+ clearTimeout(this.overlayTimeout_);
+ this.overlayTimeout_ = null;
+
+ if (this.overlayNode_.parentNode)
+ this.overlayNode_.parentNode.removeChild(this.overlayNode_);
+ this.overlayNode_.style.opacity = '0.75';
+};
+
+/**
+ * Paste from the system clipboard to the terminal.
+ */
+hterm.Terminal.prototype.paste = function() {
+ return hterm.pasteFromClipboard(this.document_);
+};
+
+/**
+ * Copy a string to the system clipboard.
+ *
+ * Note: If there is a selected range in the terminal, it'll be cleared.
+ *
+ * @param {string} str The string to copy.
+ */
+hterm.Terminal.prototype.copyStringToClipboard = function(str) {
+ if (this.prefs_.get('enable-clipboard-notice'))
+ setTimeout(this.showOverlay.bind(this, hterm.notifyCopyMessage, 500), 200);
+
+ hterm.copySelectionToClipboard(this.document_, str);
+};
+
+/**
+ * Display an image.
+ *
+ * Either URI or buffer or blob fields must be specified.
+ *
+ * @param {Object} options The image to display.
+ * @param {string=} options.name A human readable string for the image.
+ * @param {string|number=} options.size The size (in bytes).
+ * @param {boolean=} options.preserveAspectRatio Whether to preserve aspect.
+ * @param {boolean=} options.inline Whether to display the image inline.
+ * @param {string|number=} options.width The width of the image.
+ * @param {string|number=} options.height The height of the image.
+ * @param {string=} options.align Direction to align the image.
+ * @param {string=} options.uri The source URI for the image.
+ * @param {ArrayBuffer=} options.buffer The ArrayBuffer image data.
+ * @param {Blob=} options.blob The Blob image data.
+ * @param {function=} onLoad Callback when loading finishes.
+ * @param {function(Event)=} onError Callback when loading fails.
+ */
+hterm.Terminal.prototype.displayImage = function(options, onLoad, onError) {
+ // Make sure we're actually given a resource to display.
+ if (options.uri === undefined && options.buffer === undefined &&
+ options.blob === undefined)
+ return;
+
+ // Set up the defaults to simplify code below.
+ if (!options.name)
+ options.name = '';
+
+ // Has the user approved image display yet?
+ if (this.allowImagesInline !== true) {
+ this.newLine();
+ const row = this.getRowNode(this.scrollbackRows_.length +
+ this.getCursorRow() - 1);
+
+ if (this.allowImagesInline === false) {
+ row.textContent = hterm.msg('POPUP_INLINE_IMAGE_DISABLED', [],
+ 'Inline Images Disabled');
+ return;
+ }
+
+ // Show a prompt.
+ let button;
+ const span = this.document_.createElement('span');
+ span.innerText = hterm.msg('POPUP_INLINE_IMAGE', [], 'Inline Images');
+ span.style.fontWeight = 'bold';
+ span.style.borderWidth = '1px';
+ span.style.borderStyle = 'dashed';
+ button = this.document_.createElement('span');
+ button.innerText = hterm.msg('BUTTON_BLOCK', [], 'block');
+ button.style.marginLeft = '1em';
+ button.style.borderWidth = '1px';
+ button.style.borderStyle = 'solid';
+ button.addEventListener('click', () => {
+ this.prefs_.set('allow-images-inline', false);
+ });
+ span.appendChild(button);
+ button = this.document_.createElement('span');
+ button.innerText = hterm.msg('BUTTON_ALLOW_SESSION', [],
+ 'allow this session');
+ button.style.marginLeft = '1em';
+ button.style.borderWidth = '1px';
+ button.style.borderStyle = 'solid';
+ button.addEventListener('click', () => {
+ this.allowImagesInline = true;
+ });
+ span.appendChild(button);
+ button = this.document_.createElement('span');
+ button.innerText = hterm.msg('BUTTON_ALLOW_ALWAYS', [], 'always allow');
+ button.style.marginLeft = '1em';
+ button.style.borderWidth = '1px';
+ button.style.borderStyle = 'solid';
+ button.addEventListener('click', () => {
+ this.prefs_.set('allow-images-inline', true);
+ });
+ span.appendChild(button);
+
+ row.appendChild(span);
+ return;
+ }
+
+ // See if we should show this object directly, or download it.
+ if (options.inline) {
+ const io = this.io.push();
+ io.showOverlay(hterm.msg('LOADING_RESOURCE_START', [options.name],
+ 'Loading $1 ...'), null);
+
+ // While we're loading the image, eat all the user's input.
+ io.onVTKeystroke = io.sendString = () => {};
+
+ // Initialize this new image.
+ const img =
+ /** @type {!HTMLImageElement} */ (this.document_.createElement('img'));
+ if (options.uri !== undefined) {
+ img.src = options.uri;
+ } else if (options.buffer !== undefined) {
+ const blob = new Blob([options.buffer]);
+ img.src = URL.createObjectURL(blob);
+ } else {
+ img.src = URL.createObjectURL(options.blob);
+ }
+ img.title = img.alt = options.name;
+
+ // Attach the image to the page to let it load/render. It won't stay here.
+ // This is needed so it's visible and the DOM can calculate the height. If
+ // the image is hidden or not in the DOM, the height is always 0.
+ this.document_.body.appendChild(img);
+
+ // Wait for the image to finish loading before we try moving it to the
+ // right place in the terminal.
+ img.onload = () => {
+ // Now that we have the image dimensions, figure out how to show it.
+ img.style.objectFit = options.preserveAspectRatio ? 'scale-down' : 'fill';
+ img.style.maxWidth = `${this.document_.body.clientWidth}px`;
+ img.style.maxHeight = `${this.document_.body.clientHeight}px`;
+
+ // Parse a width/height specification.
+ const parseDim = (dim, maxDim, cssVar) => {
+ if (!dim || dim == 'auto')
+ return '';
+
+ const ary = dim.match(/^([0-9]+)(px|%)?$/);
+ if (ary) {
+ if (ary[2] == '%')
+ return maxDim * parseInt(ary[1]) / 100 + 'px';
+ else if (ary[2] == 'px')
+ return dim;
+ else
+ return `calc(${dim} * var(${cssVar}))`;
+ }
+
+ return '';
+ };
+ img.style.width =
+ parseDim(options.width, this.document_.body.clientWidth,
+ '--hterm-charsize-width');
+ img.style.height =
+ parseDim(options.height, this.document_.body.clientHeight,
+ '--hterm-charsize-height');
+
+ // Figure out how many rows the image occupies, then add that many.
+ // XXX: This count will be inaccurate if the font size changes on us.
+ const padRows = Math.ceil(img.clientHeight /
+ this.scrollPort_.characterSize.height);
+ for (let i = 0; i < padRows; ++i)
+ this.newLine();
+
+ // Update the max height in case the user shrinks the character size.
+ img.style.maxHeight = `calc(${padRows} * var(--hterm-charsize-height))`;
+
+ // Move the image to the last row. This way when we scroll up, it doesn't
+ // disappear when the first row gets clipped. It will disappear when we
+ // scroll down and the last row is clipped ...
+ this.document_.body.removeChild(img);
+ // Create a wrapper node so we can do an absolute in a relative position.
+ // This helps with rounding errors between JS & CSS counts.
+ const div = this.document_.createElement('div');
+ div.style.position = 'relative';
+ div.style.textAlign = options.align;
+ img.style.position = 'absolute';
+ img.style.bottom = 'calc(0px - var(--hterm-charsize-height))';
+ div.appendChild(img);
+ const row = this.getRowNode(this.scrollbackRows_.length +
+ this.getCursorRow() - 1);
+ row.appendChild(div);
+
+ // Now that the image has been read, we can revoke the source.
+ if (options.uri === undefined) {
+ URL.revokeObjectURL(img.src);
+ }
+
+ io.hideOverlay();
+ io.pop();
+
+ if (onLoad)
+ onLoad();
+ };
+
+ // If we got a malformed image, give up.
+ img.onerror = (e) => {
+ this.document_.body.removeChild(img);
+ io.showOverlay(hterm.msg('LOADING_RESOURCE_FAILED', [options.name],
+ 'Loading $1 failed'));
+ io.pop();
+
+ if (onError)
+ onError(e);
+ };
+ } else {
+ // We can't use chrome.downloads.download as that requires "downloads"
+ // permissions, and that works only in extensions, not apps.
+ const a = this.document_.createElement('a');
+ if (options.uri !== undefined) {
+ a.href = options.uri;
+ } else if (options.buffer !== undefined) {
+ const blob = new Blob([options.buffer]);
+ a.href = URL.createObjectURL(blob);
+ } else {
+ a.href = URL.createObjectURL(options.blob);
+ }
+ a.download = options.name;
+ this.document_.body.appendChild(a);
+ a.click();
+ a.remove();
+ if (options.uri === undefined) {
+ URL.revokeObjectURL(a.href);
+ }
+ }
+};
+
+/**
+ * Returns the selected text, or null if no text is selected.
+ *
+ * @return {string|null}
+ */
+hterm.Terminal.prototype.getSelectionText = function() {
+ var selection = this.scrollPort_.selection;
+ selection.sync();
+
+ if (selection.isCollapsed)
+ return null;
+
+ // Start offset measures from the beginning of the line.
+ var startOffset = selection.startOffset;
+ var node = selection.startNode;
+
+ // If an x-row isn't selected, |node| will be null.
+ if (!node)
+ return null;
+
+ if (node.nodeName != 'X-ROW') {
+ // If the selection doesn't start on an x-row node, then it must be
+ // somewhere inside the x-row. Add any characters from previous siblings
+ // into the start offset.
+
+ if (node.nodeName == '#text' && node.parentNode.nodeName == 'SPAN') {
+ // If node is the text node in a styled span, move up to the span node.
+ node = node.parentNode;
+ }
+
+ while (node.previousSibling) {
+ node = node.previousSibling;
+ startOffset += hterm.TextAttributes.nodeWidth(node);
+ }
+ }
+
+ // End offset measures from the end of the line.
+ var endOffset = (hterm.TextAttributes.nodeWidth(selection.endNode) -
+ selection.endOffset);
+ node = selection.endNode;
+
+ if (node.nodeName != 'X-ROW') {
+ // If the selection doesn't end on an x-row node, then it must be
+ // somewhere inside the x-row. Add any characters from following siblings
+ // into the end offset.
+
+ if (node.nodeName == '#text' && node.parentNode.nodeName == 'SPAN') {
+ // If node is the text node in a styled span, move up to the span node.
+ node = node.parentNode;
+ }
+
+ while (node.nextSibling) {
+ node = node.nextSibling;
+ endOffset += hterm.TextAttributes.nodeWidth(node);
+ }
+ }
+
+ var rv = this.getRowsText(selection.startRow.rowIndex,
+ selection.endRow.rowIndex + 1);
+ return lib.wc.substring(rv, startOffset, lib.wc.strWidth(rv) - endOffset);
+};
+
+/**
+ * Copy the current selection to the system clipboard, then clear it after a
+ * short delay.
+ */
+hterm.Terminal.prototype.copySelectionToClipboard = function() {
+ var text = this.getSelectionText();
+ if (text != null)
+ this.copyStringToClipboard(text);
+};
+
+hterm.Terminal.prototype.overlaySize = function() {
+ this.showOverlay(this.screenSize.width + 'x' + this.screenSize.height);
+};
+
+/**
+ * Invoked by hterm.Terminal.Keyboard when a VT keystroke is detected.
+ *
+ * @param {string} string The VT string representing the keystroke, in UTF-16.
+ */
+hterm.Terminal.prototype.onVTKeystroke = function(string) {
+ if (this.scrollOnKeystroke_)
+ this.scrollPort_.scrollRowToBottom(this.getRowCount());
+
+ this.io.onVTKeystroke(string);
+};
+
+/**
+ * Open the selected url.
+ */
+hterm.Terminal.prototype.openSelectedUrl_ = function() {
+ var str = this.getSelectionText();
+
+ // If there is no selection, try and expand wherever they clicked.
+ if (str == null) {
+ this.screen_.expandSelectionForUrl(this.document_.getSelection());
+ str = this.getSelectionText();
+
+ // If clicking in empty space, return.
+ if (str == null)
+ return;
+ }
+
+ // Make sure URL is valid before opening.
+ if (str.length > 2048 || str.search(/[\s\[\](){}<>"'\\^`]/) >= 0)
+ return;
+
+ // If the URI isn't anchored, it'll open relative to the extension.
+ // We have no way of knowing the correct schema, so assume http.
+ if (str.search('^[a-zA-Z][a-zA-Z0-9+.-]*://') < 0) {
+ // We have to whitelist a few protocols that lack authorities and thus
+ // never use the //. Like mailto.
+ switch (str.split(':', 1)[0]) {
+ case 'mailto':
+ break;
+ default:
+ str = 'http://' + str;
+ break;
+ }
+ }
+
+ hterm.openUrl(str);
+};
+
+/**
+ * Manage the automatic mouse hiding behavior while typing.
+ *
+ * @param {boolean=} v Whether to enable automatic hiding.
+ */
+hterm.Terminal.prototype.setAutomaticMouseHiding = function(v=null) {
+ // Since Chrome OS & macOS do this by default everywhere, we don't need to.
+ // Linux & Windows seem to leave this to specific applications to manage.
+ if (v === null)
+ v = (hterm.os != 'cros' && hterm.os != 'mac');
+
+ this.mouseHideWhileTyping_ = !!v;
+};
+
+/**
+ * Handler for monitoring user keyboard activity.
+ *
+ * This isn't for processing the keystrokes directly, but for updating any
+ * state that might toggle based on the user using the keyboard at all.
+ *
+ * @param {KeyboardEvent} e The keyboard event that triggered us.
+ */
+hterm.Terminal.prototype.onKeyboardActivity_ = function(e) {
+ // When the user starts typing, hide the mouse cursor.
+ if (this.mouseHideWhileTyping_ && !this.mouseHideDelay_)
+ this.setCssVar('mouse-cursor-style', 'none');
+};
+
+/**
+ * Add the terminalRow and terminalColumn properties to mouse events and
+ * then forward on to onMouse().
+ *
+ * The terminalRow and terminalColumn properties contain the (row, column)
+ * coordinates for the mouse event.
+ *
+ * @param {Event} e The mouse event to handle.
+ */
+hterm.Terminal.prototype.onMouse_ = function(e) {
+ if (e.processedByTerminalHandler_) {
+ // We register our event handlers on the document, as well as the cursor
+ // and the scroll blocker. Mouse events that occur on the cursor or
+ // scroll blocker will also appear on the document, but we don't want to
+ // process them twice.
+ //
+ // We can't just prevent bubbling because that has other side effects, so
+ // we decorate the event object with this property instead.
+ return;
+ }
+
+ // Consume navigation events. Button 3 is usually "browser back" and
+ // button 4 is "browser forward" which we don't want to happen.
+ if (e.button > 2) {
+ e.preventDefault();
+ // We don't return so click events can be passed to the remote below.
+ }
+
+ var reportMouseEvents = (!this.defeatMouseReports_ &&
+ this.vt.mouseReport != this.vt.MOUSE_REPORT_DISABLED);
+
+ e.processedByTerminalHandler_ = true;
+
+ // Handle auto hiding of mouse cursor while typing.
+ if (this.mouseHideWhileTyping_ && !this.mouseHideDelay_) {
+ // Make sure the mouse cursor is visible.
+ this.syncMouseStyle();
+ // This debounce isn't perfect, but should work well enough for such a
+ // simple implementation. If the user moved the mouse, we enabled this
+ // debounce, and then moved the mouse just before the timeout, we wouldn't
+ // debounce that later movement.
+ this.mouseHideDelay_ = setTimeout(() => this.mouseHideDelay_ = null, 1000);
+ }
+
+ // One based row/column stored on the mouse event.
+ e.terminalRow = parseInt((e.clientY - this.scrollPort_.visibleRowTopMargin) /
+ this.scrollPort_.characterSize.height) + 1;
+ e.terminalColumn = parseInt(e.clientX /
+ this.scrollPort_.characterSize.width) + 1;
+
+ if (e.type == 'mousedown' && e.terminalColumn > this.screenSize.width) {
+ // Mousedown in the scrollbar area.
+ return;
+ }
+
+ if (this.options_.cursorVisible && !reportMouseEvents) {
+ // If the cursor is visible and we're not sending mouse events to the
+ // host app, then we want to hide the terminal cursor when the mouse
+ // cursor is over top. This keeps the terminal cursor from interfering
+ // with local text selection.
+ if (e.terminalRow - 1 == this.screen_.cursorPosition.row &&
+ e.terminalColumn - 1 == this.screen_.cursorPosition.column) {
+ this.cursorNode_.style.display = 'none';
+ } else if (this.cursorNode_.style.display == 'none') {
+ this.cursorNode_.style.display = '';
+ }
+ }
+
+ if (e.type == 'mousedown') {
+ this.contextMenu.hide(e);
+
+ if (e.altKey || !reportMouseEvents) {
+ // If VT mouse reporting is disabled, or has been defeated with
+ // alt-mousedown, then the mouse will act on the local selection.
+ this.defeatMouseReports_ = true;
+ this.setSelectionEnabled(true);
+ } else {
+ // Otherwise we defer ownership of the mouse to the VT.
+ this.defeatMouseReports_ = false;
+ this.document_.getSelection().collapseToEnd();
+ this.setSelectionEnabled(false);
+ e.preventDefault();
+ }
+ }
+
+ if (!reportMouseEvents) {
+ if (e.type == 'dblclick') {
+ this.screen_.expandSelection(this.document_.getSelection());
+ if (this.copyOnSelect)
+ this.copySelectionToClipboard();
+ }
+
+ if (e.type == 'click' && !e.shiftKey && (e.ctrlKey || e.metaKey)) {
+ // Debounce this event with the dblclick event. If you try to doubleclick
+ // a URL to open it, Chrome will fire click then dblclick, but we won't
+ // have expanded the selection text at the first click event.
+ clearTimeout(this.timeouts_.openUrl);
+ this.timeouts_.openUrl = setTimeout(this.openSelectedUrl_.bind(this),
+ 500);
+ return;
+ }
+
+ if (e.type == 'mousedown') {
+ if (e.ctrlKey && e.button == 2 /* right button */) {
+ e.preventDefault();
+ this.contextMenu.show(e, this);
+ } else if (e.button == this.mousePasteButton ||
+ (this.mouseRightClickPaste && e.button == 2 /* right button */)) {
+ if (!this.paste())
+ console.warn('Could not paste manually due to web restrictions');
+ }
+ }
+
+ if (e.type == 'mouseup' && e.button == 0 && this.copyOnSelect &&
+ !this.document_.getSelection().isCollapsed) {
+ this.copySelectionToClipboard();
+ }
+
+ if ((e.type == 'mousemove' || e.type == 'mouseup') &&
+ this.scrollBlockerNode_.engaged) {
+ // Disengage the scroll-blocker after one of these events.
+ this.scrollBlockerNode_.engaged = false;
+ this.scrollBlockerNode_.style.top = '-99px';
+ }
+
+ // Emulate arrow key presses via scroll wheel events.
+ if (this.scrollWheelArrowKeys_ && !e.shiftKey &&
+ this.keyboard.applicationCursor && !this.isPrimaryScreen()) {
+ if (e.type == 'wheel') {
+ const delta = this.scrollPort_.scrollWheelDelta(e);
+
+ // Helper to turn a wheel event delta into a series of key presses.
+ const deltaToArrows = (distance, charSize, arrowPos, arrowNeg) => {
+ if (distance == 0) {
+ return '';
+ }
+
+ // Convert the scroll distance into a number of rows/cols.
+ const cells = lib.f.smartFloorDivide(Math.abs(distance), charSize);
+ const data = '\x1bO' + (distance < 0 ? arrowNeg : arrowPos);
+ return data.repeat(cells);
+ };
+
+ // The order between up/down and left/right doesn't really matter.
+ this.io.sendString(
+ // Up/down arrow keys.
+ deltaToArrows(delta.y, this.scrollPort_.characterSize.height,
+ 'A', 'B') +
+ // Left/right arrow keys.
+ deltaToArrows(delta.x, this.scrollPort_.characterSize.width,
+ 'C', 'D')
+ );
+
+ e.preventDefault();
+ }
+ }
+ } else /* if (this.reportMouseEvents) */ {
+ if (!this.scrollBlockerNode_.engaged) {
+ if (e.type == 'mousedown') {
+ // Move the scroll-blocker into place if we want to keep the scrollport
+ // from scrolling.
+ this.scrollBlockerNode_.engaged = true;
+ this.scrollBlockerNode_.style.top = (e.clientY - 5) + 'px';
+ this.scrollBlockerNode_.style.left = (e.clientX - 5) + 'px';
+ } else if (e.type == 'mousemove') {
+ // Oh. This means that drag-scroll was disabled AFTER the mouse down,
+ // in which case it's too late to engage the scroll-blocker.
+ this.document_.getSelection().collapseToEnd();
+ e.preventDefault();
+ }
+ }
+
+ this.onMouse(e);
+ }
+
+ if (e.type == 'mouseup' && this.document_.getSelection().isCollapsed) {
+ // Restore this on mouseup in case it was temporarily defeated with a
+ // alt-mousedown. Only do this when the selection is empty so that
+ // we don't immediately kill the users selection.
+ this.defeatMouseReports_ = false;
+ }
+};
+
+/**
+ * Clients should override this if they care to know about mouse events.
+ *
+ * The event parameter will be a normal DOM mouse click event with additional
+ * 'terminalRow' and 'terminalColumn' properties.
+ *
+ * @param {Event} e The mouse event to handle.
+ */
+hterm.Terminal.prototype.onMouse = function(e) { };
+
+/**
+ * React when focus changes.
+ *
+ * @param {boolean} focused True if focused, false otherwise.
+ */
+hterm.Terminal.prototype.onFocusChange_ = function(focused) {
+ this.cursorNode_.setAttribute('focus', focused);
+ this.restyleCursor_();
+
+ if (this.reportFocus)
+ this.io.sendString(focused === true ? '\x1b[I' : '\x1b[O');
+
+ if (focused === true)
+ this.closeBellNotifications_();
+};
+
+/**
+ * React when the ScrollPort is scrolled.
+ */
+hterm.Terminal.prototype.onScroll_ = function() {
+ this.scheduleSyncCursorPosition_();
+};
+
+/**
+ * React when text is pasted into the scrollPort.
+ *
+ * @param {Event} e The DOM paste event to handle.
+ */
+hterm.Terminal.prototype.onPaste_ = function(e) {
+ var data = e.text.replace(/\n/mg, '\r');
+ if (this.options_.bracketedPaste) {
+ // We strip out most escape sequences as they can cause issues (like
+ // inserting an \x1b[201~ midstream). We pass through whitespace
+ // though: 0x08:\b 0x09:\t 0x0a:\n 0x0d:\r.
+ // This matches xterm behavior.
+ const filter = (data) => data.replace(/[\x00-\x07\x0b-\x0c\x0e-\x1f]/g, '');
+ data = '\x1b[200~' + filter(data) + '\x1b[201~';
+ }
+
+ this.io.sendString(data);
+};
+
+/**
+ * React when the user tries to copy from the scrollPort.
+ *
+ * @param {Event} e The DOM copy event.
+ */
+hterm.Terminal.prototype.onCopy_ = function(e) {
+ if (!this.useDefaultWindowCopy) {
+ e.preventDefault();
+ setTimeout(this.copySelectionToClipboard.bind(this), 0);
+ }
+};
+
+/**
+ * React when the ScrollPort is resized.
+ *
+ * Note: This function should not directly contain code that alters the internal
+ * state of the terminal. That kind of code belongs in realizeWidth or
+ * realizeHeight, so that it can be executed synchronously in the case of a
+ * programmatic width change.
+ */
+hterm.Terminal.prototype.onResize_ = function() {
+ var columnCount = Math.floor(this.scrollPort_.getScreenWidth() /
+ this.scrollPort_.characterSize.width) || 0;
+ var rowCount = lib.f.smartFloorDivide(this.scrollPort_.getScreenHeight(),
+ this.scrollPort_.characterSize.height) || 0;
+
+ if (columnCount <= 0 || rowCount <= 0) {
+ // We avoid these situations since they happen sometimes when the terminal
+ // gets removed from the document or during the initial load, and we can't
+ // deal with that.
+ // This can also happen if called before the scrollPort calculates the
+ // character size, meaning we dived by 0 above and default to 0 values.
+ return;
+ }
+
+ var isNewSize = (columnCount != this.screenSize.width ||
+ rowCount != this.screenSize.height);
+
+ // We do this even if the size didn't change, just to be sure everything is
+ // in sync.
+ this.realizeSize_(columnCount, rowCount);
+ this.showZoomWarning_(this.scrollPort_.characterSize.zoomFactor != 1);
+
+ if (isNewSize)
+ this.overlaySize();
+
+ this.restyleCursor_();
+ this.scheduleSyncCursorPosition_();
+};
+
+/**
+ * Service the cursor blink timeout.
+ */
+hterm.Terminal.prototype.onCursorBlink_ = function() {
+ if (!this.options_.cursorBlink) {
+ delete this.timeouts_.cursorBlink;
+ return;
+ }
+
+ if (this.cursorNode_.getAttribute('focus') == 'false' ||
+ this.cursorNode_.style.opacity == '0') {
+ this.cursorNode_.style.opacity = '1';
+ this.timeouts_.cursorBlink = setTimeout(this.myOnCursorBlink_,
+ this.cursorBlinkCycle_[0]);
+ } else {
+ this.cursorNode_.style.opacity = '0';
+ this.timeouts_.cursorBlink = setTimeout(this.myOnCursorBlink_,
+ this.cursorBlinkCycle_[1]);
+ }
+};
+
+/**
+ * Set the scrollbar-visible mode bit.
+ *
+ * If scrollbar-visible is on, the vertical scrollbar will be visible.
+ * Otherwise it will not.
+ *
+ * Defaults to on.
+ *
+ * @param {boolean} state True to set scrollbar-visible mode, false to unset.
+ */
+hterm.Terminal.prototype.setScrollbarVisible = function(state) {
+ this.scrollPort_.setScrollbarVisible(state);
+};
+
+/**
+ * Set the scroll wheel move multiplier. This will affect how fast the page
+ * scrolls on wheel events.
+ *
+ * Defaults to 1.
+ *
+ * @param {number} multiplier The multiplier to set.
+ */
+hterm.Terminal.prototype.setScrollWheelMoveMultipler = function(multiplier) {
+ this.scrollPort_.setScrollWheelMoveMultipler(multiplier);
+};
+
+/**
+ * Close all web notifications created by terminal bells.
+ */
+hterm.Terminal.prototype.closeBellNotifications_ = function() {
+ this.bellNotificationList_.forEach(function(n) {
+ n.close();
+ });
+ this.bellNotificationList_.length = 0;
+};
+
+/**
+ * Syncs the cursor position when the scrollport gains focus.
+ */
+hterm.Terminal.prototype.onScrollportFocus_ = function() {
+ // If the cursor is offscreen we set selection to the last row on the screen.
+ const topRowIndex = this.scrollPort_.getTopRowIndex();
+ const bottomRowIndex = this.scrollPort_.getBottomRowIndex(topRowIndex);
+ const selection = this.document_.getSelection();
+ if (!this.syncCursorPosition_() && selection) {
+ selection.collapse(this.getRowNode(bottomRowIndex));
+ }
+};
+// SOURCE FILE: hterm/js/hterm_terminal_io.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+lib.rtdep('lib.encodeUTF8');
+
+/**
+ * Input/Output interface used by commands to communicate with the terminal.
+ *
+ * Commands like `nassh` and `crosh` receive an instance of this class as
+ * part of their argv object. This allows them to write to and read from the
+ * terminal without exposing them to an entire hterm.Terminal instance.
+ *
+ * The active command must override the onVTKeystroke() and sendString() methods
+ * of this class in order to receive keystrokes and send output to the correct
+ * destination.
+ *
+ * Isolating commands from the terminal provides the following benefits:
+ * - Provides a mechanism to save and restore onVTKeystroke and sendString
+ * handlers when invoking subcommands (see the push() and pop() methods).
+ * - The isolation makes it easier to make changes in Terminal and supporting
+ * classes without affecting commands.
+ * - In The Future commands may run in web workers where they would only be able
+ * to talk to a Terminal instance through an IPC mechanism.
+ *
+ * @param {hterm.Terminal}
+ */
+hterm.Terminal.IO = function(terminal) {
+ this.terminal_ = terminal;
+
+ // The IO object to restore on IO.pop().
+ this.previousIO_ = null;
+
+ // Any data this object accumulated while not active.
+ this.buffered_ = '';
+};
+
+/**
+ * Show the terminal overlay for a given amount of time.
+ *
+ * The terminal overlay appears in inverse video in a large font, centered
+ * over the terminal. You should probably keep the overlay message brief,
+ * since it's in a large font and you probably aren't going to check the size
+ * of the terminal first.
+ *
+ * @param {string} msg The text (not HTML) message to display in the overlay.
+ * @param {number} opt_timeout The amount of time to wait before fading out
+ * the overlay. Defaults to 1.5 seconds. Pass null to have the overlay
+ * stay up forever (or until the next overlay).
+ */
+hterm.Terminal.IO.prototype.showOverlay = function(message, opt_timeout) {
+ this.terminal_.showOverlay(message, opt_timeout);
+};
+
+/**
+ * Hide the current overlay immediately.
+ *
+ * Useful when we show an overlay for an event with an unknown end time.
+ */
+hterm.Terminal.IO.prototype.hideOverlay = function() {
+ this.terminal_.hideOverlay();
+};
+
+/**
+ * Open an frame in the current terminal window, pointed to the specified
+ * url.
+ *
+ * Eventually we'll probably need size/position/decoration options.
+ * The user should also be able to move/resize the frame.
+ *
+ * @param {string} url The URL to load in the frame.
+ * @param {Object} opt_options Optional frame options. Not implemented.
+ */
+hterm.Terminal.IO.prototype.createFrame = function(url, opt_options) {
+ return new hterm.Frame(this.terminal_, url, opt_options);
+};
+
+/**
+ * Change the preference profile for the terminal.
+ *
+ * @param profileName {string} The name of the preference profile to activate.
+ */
+hterm.Terminal.IO.prototype.setTerminalProfile = function(profileName) {
+ this.terminal_.setProfile(profileName);
+};
+
+/**
+ * Create a new hterm.Terminal.IO instance and make it active on the Terminal
+ * object associated with this instance.
+ *
+ * This is used to pass control of the terminal IO off to a subcommand. The
+ * IO.pop() method can be used to restore control when the subcommand completes.
+ */
+hterm.Terminal.IO.prototype.push = function() {
+ var io = new hterm.Terminal.IO(this.terminal_);
+ io.keyboardCaptured_ = this.keyboardCaptured_;
+
+ io.columnCount = this.columnCount;
+ io.rowCount = this.rowCount;
+
+ io.previousIO_ = this.terminal_.io;
+ this.terminal_.io = io;
+
+ return io;
+};
+
+/**
+ * Restore the Terminal's previous IO object.
+ *
+ * We'll flush out any queued data.
+ */
+hterm.Terminal.IO.prototype.pop = function() {
+ this.terminal_.io = this.previousIO_;
+ this.previousIO_.flush();
+};
+
+/**
+ * Flush accumulated data.
+ *
+ * If we're not the active IO, the connected process might still be writing
+ * data to us, but we won't be displaying it. Flush any buffered data now.
+ */
+hterm.Terminal.IO.prototype.flush = function() {
+ if (this.buffered_) {
+ this.terminal_.interpret(this.buffered_);
+ this.buffered_ = '';
+ }
+};
+
+/**
+ * Called when data needs to be sent to the current command.
+ *
+ * Clients should override this to receive notification of pending data.
+ *
+ * @param {string} string The data to send.
+ */
+hterm.Terminal.IO.prototype.sendString = function(string) {
+ // Override this.
+ console.log('Unhandled sendString: ' + string);
+};
+
+/**
+ * Called when a terminal keystroke is detected.
+ *
+ * Clients should override this to receive notification of keystrokes.
+ *
+ * @param {string} string The VT key sequence.
+ */
+hterm.Terminal.IO.prototype.onVTKeystroke = function(string) {
+ // Override this.
+ console.log('Unobserverd VT keystroke: ' + JSON.stringify(string));
+};
+
+hterm.Terminal.IO.prototype.onTerminalResize_ = function(width, height) {
+ var obj = this;
+ while (obj) {
+ obj.columnCount = width;
+ obj.rowCount = height;
+ obj = obj.previousIO_;
+ }
+
+ this.onTerminalResize(width, height);
+};
+
+/**
+ * Called when terminal size is changed.
+ *
+ * Clients should override this to receive notification of resize.
+ *
+ * @param {string|integer} terminal width.
+ * @param {string|integer} terminal height.
+ */
+hterm.Terminal.IO.prototype.onTerminalResize = function(width, height) {
+ // Override this.
+};
+
+/**
+ * Write a UTF-8 encoded byte string to the terminal.
+ *
+ * @param {string} string The UTF-8 encoded string to print.
+ */
+hterm.Terminal.IO.prototype.writeUTF8 = function(string) {
+ // If another process has the foreground IO, buffer new data sent to this IO
+ // (since it's in the background). When we're made the foreground IO again,
+ // we'll flush everything.
+ if (this.terminal_.io != this) {
+ this.buffered_ += string;
+ return;
+ }
+
+ this.terminal_.interpret(string);
+};
+
+/**
+ * Write a UTF-8 encoded byte string to the terminal followed by crlf.
+ *
+ * @param {string} string The UTF-8 encoded string to print.
+ */
+hterm.Terminal.IO.prototype.writelnUTF8 = function(string) {
+ this.writeUTF8(string + '\r\n');
+};
+
+/**
+ * Write a UTF-16 JavaScript string to the terminal.
+ *
+ * @param {string} string The string to print.
+ */
+hterm.Terminal.IO.prototype.print =
+hterm.Terminal.IO.prototype.writeUTF16 = function(string) {
+ this.writeUTF8(lib.encodeUTF8(string));
+};
+
+/**
+ * Print a UTF-16 JavaScript string to the terminal followed by a newline.
+ *
+ * @param {string} string The string to print.
+ */
+hterm.Terminal.IO.prototype.println =
+hterm.Terminal.IO.prototype.writelnUTF16 = function(string) {
+ this.writelnUTF8(lib.encodeUTF8(string));
+};
+// SOURCE FILE: hterm/js/hterm_text_attributes.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+lib.rtdep('lib.colors');
+
+/**
+ * Constructor for TextAttribute objects.
+ *
+ * These objects manage a set of text attributes such as foreground/
+ * background color, bold, faint, italic, blink, underline, and strikethrough.
+ *
+ * TextAttribute instances can be used to construct a DOM container implementing
+ * the current attributes, or to test an existing DOM container for
+ * compatibility with the current attributes.
+ *
+ * @constructor
+ * @param {HTMLDocument} document The parent document to use when creating
+ * new DOM containers.
+ */
+hterm.TextAttributes = function(document) {
+ this.document_ = document;
+ // These variables contain the source of the color as either:
+ // SRC_DEFAULT (use context default)
+ // rgb(...) (true color form)
+ // number (representing the index from color palette to use)
+ this.foregroundSource = this.SRC_DEFAULT;
+ this.backgroundSource = this.SRC_DEFAULT;
+ this.underlineSource = this.SRC_DEFAULT;
+
+ // These properties cache the value in the color table, but foregroundSource
+ // and backgroundSource contain the canonical values.
+ this.foreground = this.DEFAULT_COLOR;
+ this.background = this.DEFAULT_COLOR;
+ this.underlineColor = this.DEFAULT_COLOR;
+
+ this.defaultForeground = 'rgb(255, 255, 255)';
+ this.defaultBackground = 'rgb(0, 0, 0)';
+
+ // Any attributes added here that do not default to falsey (e.g. undefined or
+ // null) require a bit more care. createContainer has to always attach the
+ // attribute so matchesContainer can work correctly.
+ this.bold = false;
+ this.faint = false;
+ this.italic = false;
+ this.blink = false;
+ this.underline = false;
+ this.strikethrough = false;
+ this.inverse = false;
+ this.invisible = false;
+ this.wcNode = false;
+ this.asciiNode = true;
+ this.tileData = null;
+ this.uri = null;
+ this.uriId = null;
+
+ this.colorPalette = null;
+ this.resetColorPalette();
+};
+
+/**
+ * If false, we ignore the bold attribute.
+ *
+ * This is used for fonts that have a bold version that is a different size
+ * than the normal weight version.
+ */
+hterm.TextAttributes.prototype.enableBold = true;
+
+/**
+ * If true, use bright colors (if available) for bold text.
+ *
+ * This setting is independent of the enableBold setting.
+ */
+hterm.TextAttributes.prototype.enableBoldAsBright = true;
+
+/**
+ * A sentinel constant meaning "whatever the default color is in this context".
+ */
+hterm.TextAttributes.prototype.DEFAULT_COLOR = lib.f.createEnum('');
+
+/**
+ * A constant string used to specify that source color is context default.
+ */
+hterm.TextAttributes.prototype.SRC_DEFAULT = 'default';
+
+/**
+ * The document object which should own the DOM nodes created by this instance.
+ *
+ * @param {HTMLDocument} document The parent document.
+ */
+hterm.TextAttributes.prototype.setDocument = function(document) {
+ this.document_ = document;
+};
+
+/**
+ * Create a deep copy of this object.
+ *
+ * @return {hterm.TextAttributes} A deep copy of this object.
+ */
+hterm.TextAttributes.prototype.clone = function() {
+ var rv = new hterm.TextAttributes(null);
+
+ for (var key in this) {
+ rv[key] = this[key];
+ }
+
+ rv.colorPalette = this.colorPalette.concat();
+ return rv;
+};
+
+/**
+ * Reset the current set of attributes.
+ *
+ * This does not affect the palette. Use resetColorPalette() for that.
+ * It also doesn't affect the tile data, it's not meant to.
+ */
+hterm.TextAttributes.prototype.reset = function() {
+ this.foregroundSource = this.SRC_DEFAULT;
+ this.backgroundSource = this.SRC_DEFAULT;
+ this.underlineSource = this.SRC_DEFAULT;
+ this.foreground = this.DEFAULT_COLOR;
+ this.background = this.DEFAULT_COLOR;
+ this.underlineColor = this.DEFAULT_COLOR;
+ this.bold = false;
+ this.faint = false;
+ this.italic = false;
+ this.blink = false;
+ this.underline = false;
+ this.strikethrough = false;
+ this.inverse = false;
+ this.invisible = false;
+ this.wcNode = false;
+ this.asciiNode = true;
+ this.uri = null;
+ this.uriId = null;
+};
+
+/**
+ * Reset the color palette to the default state.
+ */
+hterm.TextAttributes.prototype.resetColorPalette = function() {
+ this.colorPalette = lib.colors.colorPalette.concat();
+ this.syncColors();
+};
+
+/**
+ * Reset the color.
+ *
+ * @param {integer|string} index The color index in the palette to reset.
+ */
+hterm.TextAttributes.prototype.resetColor = function(index) {
+ index = parseInt(index, 10);
+ if (isNaN(index) || index >= this.colorPalette.length)
+ return;
+
+ this.colorPalette[index] = lib.colors.stockColorPalette[index];
+ this.syncColors();
+};
+
+/**
+ * Test if the current attributes describe unstyled text.
+ *
+ * @return {boolean} True if the current attributes describe unstyled text.
+ */
+hterm.TextAttributes.prototype.isDefault = function() {
+ return (this.foregroundSource == this.SRC_DEFAULT &&
+ this.backgroundSource == this.SRC_DEFAULT &&
+ !this.bold &&
+ !this.faint &&
+ !this.italic &&
+ !this.blink &&
+ !this.underline &&
+ !this.strikethrough &&
+ !this.inverse &&
+ !this.invisible &&
+ !this.wcNode &&
+ this.asciiNode &&
+ this.tileData == null &&
+ this.uri == null);
+};
+
+/**
+ * Create a DOM container (a span or a text node) with a style to match the
+ * current set of attributes.
+ *
+ * This method will create a plain text node if the text is unstyled, or
+ * an HTML span if the text is styled. Due to lack of monospace wide character
+ * fonts on certain systems (e.g. Chrome OS), we need to put each wide character
+ * in a span of CSS class '.wc-node' which has double column width.
+ * Each vt_tiledata tile is also represented by a span with a single
+ * character, with CSS classes '.tile' and '.tile_<glyph number>'.
+ *
+ * @param {string} opt_textContent Optional text content for the new container.
+ * @return {HTMLNode} An HTML span or text nodes styled to match the current
+ * attributes.
+ */
+hterm.TextAttributes.prototype.createContainer = function(opt_textContent) {
+ if (this.isDefault()) {
+ // Only attach attributes where we need an explicit default for the
+ // matchContainer logic below.
+ const node = this.document_.createTextNode(opt_textContent);
+ node.asciiNode = true;
+ return node;
+ }
+
+ var span = this.document_.createElement('span');
+ var style = span.style;
+ var classes = [];
+
+ if (this.foreground != this.DEFAULT_COLOR)
+ style.color = this.foreground;
+
+ if (this.background != this.DEFAULT_COLOR)
+ style.backgroundColor = this.background;
+
+ if (this.enableBold && this.bold)
+ style.fontWeight = 'bold';
+
+ if (this.faint)
+ span.faint = true;
+
+ if (this.italic)
+ style.fontStyle = 'italic';
+
+ if (this.blink) {
+ classes.push('blink-node');
+ span.blinkNode = true;
+ }
+
+ let textDecorationLine = '';
+ span.underline = this.underline;
+ if (this.underline) {
+ textDecorationLine += ' underline';
+ style.textDecorationStyle = this.underline;
+ }
+ if (this.underlineSource != this.SRC_DEFAULT)
+ style.textDecorationColor = this.underlineColor;
+ if (this.strikethrough) {
+ textDecorationLine += ' line-through';
+ span.strikethrough = true;
+ }
+ if (textDecorationLine)
+ style.textDecorationLine = textDecorationLine;
+
+ if (this.wcNode) {
+ classes.push('wc-node');
+ span.wcNode = true;
+ }
+ span.asciiNode = this.asciiNode;
+
+ if (this.tileData != null) {
+ classes.push('tile');
+ classes.push('tile_' + this.tileData);
+ span.tileNode = true;
+ }
+
+ if (opt_textContent)
+ span.textContent = opt_textContent;
+
+ if (this.uri) {
+ classes.push('uri-node');
+ span.uriId = this.uriId;
+ span.title = this.uri;
+ span.addEventListener('click', hterm.openUrl.bind(this, this.uri));
+ }
+
+ if (classes.length)
+ span.className = classes.join(' ');
+
+ return span;
+};
+
+/**
+ * Tests if the provided object (string, span or text node) has the same
+ * style as this TextAttributes instance.
+ *
+ * This indicates that text with these attributes could be inserted directly
+ * into the target DOM node.
+ *
+ * For the purposes of this method, a string is considered a text node.
+ *
+ * @param {string|HTMLNode} obj The object to test.
+ * @return {boolean} True if the provided container has the same style as
+ * this attributes instance.
+ */
+hterm.TextAttributes.prototype.matchesContainer = function(obj) {
+ if (typeof obj == 'string' || obj.nodeType == Node.TEXT_NODE)
+ return this.isDefault();
+
+ var style = obj.style;
+
+ // We don't want to put multiple characters in a wcNode or a tile.
+ // See the comments in createContainer.
+ // For attributes that default to false, we do not require that obj have them
+ // declared, so always normalize them using !! (to turn undefined into false)
+ // in the compares below.
+ return (!(this.wcNode || obj.wcNode) &&
+ this.asciiNode == obj.asciiNode &&
+ !(this.tileData != null || obj.tileNode) &&
+ this.uriId == obj.uriId &&
+ this.foreground == style.color &&
+ this.background == style.backgroundColor &&
+ this.underlineColor == style.textDecorationColor &&
+ (this.enableBold && this.bold) == !!style.fontWeight &&
+ this.blink == !!obj.blinkNode &&
+ this.italic == !!style.fontStyle &&
+ this.underline == obj.underline &&
+ !!this.strikethrough == !!obj.strikethrough);
+};
+
+hterm.TextAttributes.prototype.setDefaults = function(foreground, background) {
+ this.defaultForeground = foreground;
+ this.defaultBackground = background;
+
+ this.syncColors();
+};
+
+/**
+ * Updates foreground and background properties based on current indices and
+ * other state.
+ *
+ * @param {string} terminalForeground The terminal foreground color for use as
+ * inverse text background.
+ * @param {string} terminalBackground The terminal background color for use as
+ * inverse text foreground.
+ *
+ */
+hterm.TextAttributes.prototype.syncColors = function() {
+ function getBrightIndex(i) {
+ if (i < 8) {
+ // If the color is from the lower half of the ANSI 16, add 8.
+ return i + 8;
+ }
+
+ // If it's not from the 16 color palette, ignore bold requests. This
+ // matches the behavior of gnome-terminal.
+ return i;
+ }
+
+ // Expand the default color as makes sense.
+ const getDefaultColor = (color, defaultColor) => {
+ return color == this.DEFAULT_COLOR ? defaultColor : color;
+ };
+
+ var foregroundSource = this.foregroundSource;
+ var backgroundSource = this.backgroundSource;
+
+ if (this.enableBoldAsBright && this.bold) {
+ if (Number.isInteger(foregroundSource)) {
+ foregroundSource = getBrightIndex(foregroundSource);
+ }
+ }
+
+ if (foregroundSource == this.SRC_DEFAULT)
+ this.foreground = this.DEFAULT_COLOR;
+ else if (Number.isInteger(foregroundSource))
+ this.foreground = this.colorPalette[foregroundSource];
+ else
+ this.foreground = foregroundSource;
+
+ if (this.faint) {
+ const colorToMakeFaint =
+ getDefaultColor(this.foreground, this.defaultForeground);
+ this.foreground = lib.colors.mix(colorToMakeFaint, 'rgb(0, 0, 0)', 0.3333);
+ }
+
+ if (backgroundSource == this.SRC_DEFAULT)
+ this.background = this.DEFAULT_COLOR;
+ else if (Number.isInteger(backgroundSource))
+ this.background = this.colorPalette[backgroundSource];
+ else
+ this.background = backgroundSource;
+
+ // Once we've processed the bold-as-bright and faint attributes, swap.
+ // This matches xterm/gnome-terminal.
+ if (this.inverse) {
+ const swp = getDefaultColor(this.foreground, this.defaultForeground);
+ this.foreground = getDefaultColor(this.background, this.defaultBackground);
+ this.background = swp;
+ }
+
+ // Process invisible settings last to keep it simple.
+ if (this.invisible)
+ this.foreground = this.background;
+
+ if (this.underlineSource == this.SRC_DEFAULT)
+ this.underlineColor = '';
+ else if (Number.isInteger(this.underlineSource))
+ this.underlineColor = this.colorPalette[this.underlineSource];
+ else
+ this.underlineColor = this.underlineSource;
+};
+
+/**
+ * Static method used to test if the provided objects (strings, spans or
+ * text nodes) have the same style.
+ *
+ * For the purposes of this method, a string is considered a text node.
+ *
+ * @param {string|HTMLNode} obj1 An object to test.
+ * @param {string|HTMLNode} obj2 Another object to test.
+ * @return {boolean} True if the containers have the same style.
+ */
+hterm.TextAttributes.containersMatch = function(obj1, obj2) {
+ if (typeof obj1 == 'string')
+ return hterm.TextAttributes.containerIsDefault(obj2);
+
+ if (obj1.nodeType != obj2.nodeType)
+ return false;
+
+ if (obj1.nodeType == Node.TEXT_NODE)
+ return true;
+
+ var style1 = obj1.style;
+ var style2 = obj2.style;
+
+ return (style1.color == style2.color &&
+ style1.backgroundColor == style2.backgroundColor &&
+ style1.backgroundColor == style2.backgroundColor &&
+ style1.fontWeight == style2.fontWeight &&
+ style1.fontStyle == style2.fontStyle &&
+ style1.textDecoration == style2.textDecoration &&
+ style1.textDecorationColor == style2.textDecorationColor &&
+ style1.textDecorationStyle == style2.textDecorationStyle &&
+ style1.textDecorationLine == style2.textDecorationLine);
+};
+
+/**
+ * Static method to test if a given DOM container represents unstyled text.
+ *
+ * For the purposes of this method, a string is considered a text node.
+ *
+ * @param {string|HTMLNode} obj1 An object to test.
+ * @return {boolean} True if the object is unstyled.
+ */
+hterm.TextAttributes.containerIsDefault = function(obj) {
+ return typeof obj == 'string' || obj.nodeType == Node.TEXT_NODE;
+};
+
+/**
+ * Static method to get the column width of a node's textContent.
+ *
+ * @param {HTMLElement} node The HTML element to get the width of textContent
+ * from.
+ * @return {integer} The column width of the node's textContent.
+ */
+hterm.TextAttributes.nodeWidth = function(node) {
+ if (!node.asciiNode) {
+ return lib.wc.strWidth(node.textContent);
+ } else {
+ return node.textContent.length;
+ }
+};
+
+/**
+ * Static method to get the substr of a node's textContent. The start index
+ * and substr width are computed in column width.
+ *
+ * @param {HTMLElement} node The HTML element to get the substr of textContent
+ * from.
+ * @param {integer} start The starting offset in column width.
+ * @param {integer} width The width to capture in column width.
+ * @return {integer} The extracted substr of the node's textContent.
+ */
+hterm.TextAttributes.nodeSubstr = function(node, start, width) {
+ if (!node.asciiNode) {
+ return lib.wc.substr(node.textContent, start, width);
+ } else {
+ return node.textContent.substr(start, width);
+ }
+};
+
+/**
+ * Static method to get the substring based of a node's textContent. The
+ * start index of end index are computed in column width.
+ *
+ * @param {HTMLElement} node The HTML element to get the substr of textContent
+ * from.
+ * @param {integer} start The starting offset in column width.
+ * @param {integer} end The ending offset in column width.
+ * @return {integer} The extracted substring of the node's textContent.
+ */
+hterm.TextAttributes.nodeSubstring = function(node, start, end) {
+ if (!node.asciiNode) {
+ return lib.wc.substring(node.textContent, start, end);
+ } else {
+ return node.textContent.substring(start, end);
+ }
+};
+
+/**
+ * Static method to split a string into contiguous runs of single-width
+ * characters and runs of double-width characters.
+ *
+ * @param {string} str The string to split.
+ * @return {Array} An array of objects that contain substrings of str, where
+ * each substring is either a contiguous runs of single-width characters
+ * or a double-width character. For objects that contain a double-width
+ * character, its wcNode property is set to true. For objects that contain
+ * only ASCII content, its asciiNode property is set to true.
+ */
+hterm.TextAttributes.splitWidecharString = function(str) {
+ var rv = [];
+ var base = 0, length = 0, wcStrWidth = 0, wcCharWidth;
+ var asciiNode = true;
+
+ for (var i = 0; i < str.length;) {
+ var c = str.codePointAt(i);
+ var increment;
+ if (c < 128) {
+ wcStrWidth += 1;
+ length += 1;
+ increment = 1;
+ } else {
+ increment = (c <= 0xffff) ? 1 : 2;
+ wcCharWidth = lib.wc.charWidth(c);
+ if (wcCharWidth <= 1) {
+ wcStrWidth += wcCharWidth;
+ length += increment;
+ asciiNode = false;
+ } else {
+ if (length) {
+ rv.push({
+ str: str.substr(base, length),
+ asciiNode: asciiNode,
+ wcStrWidth: wcStrWidth,
+ });
+ asciiNode = true;
+ wcStrWidth = 0;
+ }
+ rv.push({
+ str: str.substr(i, increment),
+ wcNode: true,
+ asciiNode: false,
+ wcStrWidth: 2,
+ });
+ base = i + increment;
+ length = 0;
+ }
+ }
+ i += increment;
+ }
+
+ if (length) {
+ rv.push({
+ str: str.substr(base, length),
+ asciiNode: asciiNode,
+ wcStrWidth: wcStrWidth,
+ });
+ }
+
+ return rv;
+};
+// SOURCE FILE: hterm/js/hterm_vt.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+lib.rtdep('lib.colors', 'lib.f', 'lib.UTF8Decoder',
+ 'hterm.VT.CharacterMap');
+
+/**
+ * Constructor for the VT escape sequence interpreter.
+ *
+ * The interpreter operates on a terminal object capable of performing cursor
+ * move operations, painting characters, etc.
+ *
+ * This interpreter is intended to be compatible with xterm, though it
+ * ignores some of the more esoteric escape sequences.
+ *
+ * Control sequences are documented in hterm/doc/ControlSequences.md.
+ *
+ * @param {hterm.Terminal} terminal Terminal to use with the interpreter.
+ */
+hterm.VT = function(terminal) {
+ /**
+ * The display terminal object associated with this virtual terminal.
+ */
+ this.terminal = terminal;
+
+ terminal.onMouse = this.onTerminalMouse_.bind(this);
+ this.mouseReport = this.MOUSE_REPORT_DISABLED;
+ this.mouseCoordinates = this.MOUSE_COORDINATES_X10;
+
+ // We only want to report mouse moves between cells, not between pixels.
+ this.lastMouseDragResponse_ = null;
+
+ // Parse state left over from the last parse. You should use the parseState
+ // instance passed into your parse routine, rather than reading
+ // this.parseState_ directly.
+ this.parseState_ = new hterm.VT.ParseState(this.parseUnknown_);
+
+ // Any "leading modifiers" for the escape sequence, such as '?', ' ', or the
+ // other modifiers handled in this.parseCSI_.
+ this.leadingModifier_ = '';
+
+ // Any "trailing modifiers". Same character set as a leading modifier,
+ // except these are found after the numeric arguments.
+ this.trailingModifier_ = '';
+
+ // Whether or not to respect the escape codes for setting terminal width.
+ this.allowColumnWidthChanges_ = false;
+
+ // The amount of time we're willing to wait for the end of an OSC sequence.
+ this.oscTimeLimit_ = 20000;
+
+ // Decoder to maintain UTF-8 decode state.
+ this.utf8Decoder_ = new lib.UTF8Decoder();
+
+ /**
+ * Whether to accept the 8-bit control characters.
+ *
+ * An 8-bit control character is one with the eighth bit set. These
+ * didn't work on 7-bit terminals so they all have two byte equivalents.
+ * Most hosts still only use the two-byte versions.
+ *
+ * We ignore 8-bit control codes by default. This is in order to avoid
+ * issues with "accidental" usage of codes that need to be terminated.
+ * The "accident" usually involves cat'ing binary data.
+ */
+ this.enable8BitControl = false;
+
+ /**
+ * Whether to allow the OSC 52 sequence to write to the system clipboard.
+ */
+ this.enableClipboardWrite = true;
+
+ /**
+ * Respect the host's attempt to change the cursor blink status using
+ * the DEC Private mode 12.
+ */
+ this.enableDec12 = false;
+
+ /**
+ * Respect the host's attempt to clear the scrollback buffer using CSI-J-3.
+ */
+ this.enableCsiJ3 = true;
+
+ /**
+ * The expected encoding method for data received from the host.
+ */
+ this.characterEncoding = 'utf-8';
+
+ /**
+ * If true, emit warnings when we encounter a control character or escape
+ * sequence that we don't recognize or explicitly ignore.
+ *
+ * We disable this by default as the console logging can be expensive when
+ * dumping binary files (e.g. `cat /dev/zero`) to the point where you can't
+ * recover w/out restarting.
+ */
+ this.warnUnimplemented = false;
+
+ /**
+ * The set of available character maps (used by G0...G3 below).
+ */
+ this.characterMaps = new hterm.VT.CharacterMaps();
+
+ /**
+ * The default G0...G3 character maps.
+ * We default to the US/ASCII map everywhere as that aligns with other
+ * terminals, and it makes it harder to accidentally switch to the graphics
+ * character map (Ctrl-N). Any program that wants to use the graphics map
+ * will usually select it anyways since there's no guarantee what state any
+ * of the maps are in at any particular time.
+ */
+ this.G0 = this.G1 = this.G2 = this.G3 =
+ this.characterMaps.getMap('B');
+
+ /**
+ * The 7-bit visible character set.
+ *
+ * This is a mapping from inbound data to display glyph. The GL set
+ * contains the 94 bytes from 0x21 to 0x7e.
+ *
+ * The default GL set is 'B', US ASCII.
+ */
+ this.GL = 'G0';
+
+ /**
+ * The 8-bit visible character set.
+ *
+ * This is a mapping from inbound data to display glyph. The GR set
+ * contains the 94 bytes from 0xa1 to 0xfe.
+ */
+ this.GR = 'G0';
+
+ /**
+ * The current encoding of the terminal.
+ *
+ * We only support ECMA-35 and UTF-8, so go with a boolean here.
+ * The encoding can be locked too.
+ */
+ this.codingSystemUtf8_ = false;
+ this.codingSystemLocked_ = false;
+
+ // Construct a regular expression to match the known one-byte control chars.
+ // This is used in parseUnknown_ to quickly scan a string for the next
+ // control character.
+ this.cc1Pattern_ = null;
+ this.updateEncodingState_();
+};
+
+/**
+ * No mouse events.
+ */
+hterm.VT.prototype.MOUSE_REPORT_DISABLED = 0;
+
+/**
+ * DECSET mode 9.
+ *
+ * Report mouse down events only.
+ */
+hterm.VT.prototype.MOUSE_REPORT_PRESS = 1;
+
+/**
+ * DECSET mode 1000.
+ *
+ * Report mouse down/up events only.
+ */
+hterm.VT.prototype.MOUSE_REPORT_CLICK = 2;
+
+/**
+ * DECSET mode 1002.
+ *
+ * Report mouse down/up and movement while a button is down.
+ */
+hterm.VT.prototype.MOUSE_REPORT_DRAG = 3;
+
+/**
+ * DEC mode for X10 coorindates (the default).
+ */
+hterm.VT.prototype.MOUSE_COORDINATES_X10 = 0;
+
+/**
+ * DEC mode 1005 for UTF-8 coorindates.
+ */
+hterm.VT.prototype.MOUSE_COORDINATES_UTF8 = 1;
+
+/**
+ * DEC mode 1006 for SGR coorindates.
+ */
+hterm.VT.prototype.MOUSE_COORDINATES_SGR = 2;
+
+/**
+ * ParseState constructor.
+ *
+ * This object tracks the current state of the parse. It has fields for the
+ * current buffer, position in the buffer, and the parse function.
+ *
+ * @param {function} defaultFunc The default parser function.
+ * @param {string} opt_buf Optional string to use as the current buffer.
+ */
+hterm.VT.ParseState = function(defaultFunction, opt_buf) {
+ this.defaultFunction = defaultFunction;
+ this.buf = opt_buf || null;
+ this.pos = 0;
+ this.func = defaultFunction;
+ this.args = [];
+ // Whether any of the arguments in the args array have subarguments.
+ // e.g. All CSI sequences are integer arguments separated by semi-colons,
+ // so subarguments are further colon separated.
+ this.subargs = null;
+};
+
+/**
+ * Reset the parser function, buffer, and position.
+ */
+hterm.VT.ParseState.prototype.reset = function(opt_buf) {
+ this.resetParseFunction();
+ this.resetBuf(opt_buf || '');
+ this.resetArguments();
+};
+
+/**
+ * Reset the parser function only.
+ */
+hterm.VT.ParseState.prototype.resetParseFunction = function() {
+ this.func = this.defaultFunction;
+};
+
+/**
+ * Reset the buffer and position only.
+ *
+ * @param {string} buf Optional new value for buf, defaults to null.
+ */
+hterm.VT.ParseState.prototype.resetBuf = function(opt_buf) {
+ this.buf = (typeof opt_buf == 'string') ? opt_buf : null;
+ this.pos = 0;
+};
+
+/**
+ * Reset the arguments list only.
+ *
+ * Typically we reset arguments before parsing a sequence that uses them rather
+ * than always trying to make sure they're in a good state. This can lead to
+ * confusion during debugging where args from a previous sequence appear to be
+ * "sticking around" in other sequences (which in reality don't use args).
+ *
+ * @param {string} opt_arg_zero Optional initial value for args[0].
+ */
+hterm.VT.ParseState.prototype.resetArguments = function(opt_arg_zero) {
+ this.args.length = 0;
+ if (typeof opt_arg_zero != 'undefined')
+ this.args[0] = opt_arg_zero;
+};
+
+/**
+ * Parse an argument as an integer.
+ *
+ * This assumes the inputs are already in the proper format. e.g. This won't
+ * handle non-numeric arguments.
+ *
+ * An "0" argument is treated the same as "" which means the default value will
+ * be applied. This is what most terminal sequences expect.
+ *
+ * @param {string} argstr The argument to parse directly.
+ * @param {number=} defaultValue Default value if argstr is empty.
+ * @return {number} The parsed value.
+ */
+hterm.VT.ParseState.prototype.parseInt = function(argstr, defaultValue) {
+ if (defaultValue === undefined)
+ defaultValue = 0;
+
+ if (argstr) {
+ const ret = parseInt(argstr, 10);
+ // An argument of zero is treated as the default value.
+ return ret == 0 ? defaultValue : ret;
+ }
+ return defaultValue;
+};
+
+/**
+ * Get an argument as an integer.
+ *
+ * @param {number} argnum The argument number to retrieve.
+ * @param {number=} defaultValue Default value if the argument is empty.
+ * @return {number} The parsed value.
+ */
+hterm.VT.ParseState.prototype.iarg = function(argnum, defaultValue) {
+ return this.parseInt(this.args[argnum], defaultValue);
+};
+
+/**
+ * Check whether an argument has subarguments.
+ *
+ * @param {number} argnum The argument number to check.
+ * @return {number} Whether the argument has subarguments.
+ */
+hterm.VT.ParseState.prototype.argHasSubargs = function(argnum) {
+ return this.subargs && this.subargs[argnum];
+};
+
+/**
+ * Mark an argument as having subarguments.
+ *
+ * @param {number} argnum The argument number that has subarguments.
+ */
+hterm.VT.ParseState.prototype.argSetSubargs = function(argnum) {
+ if (this.subargs === null)
+ this.subargs = {};
+ this.subargs[argnum] = true;
+};
+
+/**
+ * Advance the parse position.
+ *
+ * @param {integer} count The number of bytes to advance.
+ */
+hterm.VT.ParseState.prototype.advance = function(count) {
+ this.pos += count;
+};
+
+/**
+ * Return the remaining portion of the buffer without affecting the parse
+ * position.
+ *
+ * @return {string} The remaining portion of the buffer.
+ */
+hterm.VT.ParseState.prototype.peekRemainingBuf = function() {
+ return this.buf.substr(this.pos);
+};
+
+/**
+ * Return the next single character in the buffer without affecting the parse
+ * position.
+ *
+ * @return {string} The next character in the buffer.
+ */
+hterm.VT.ParseState.prototype.peekChar = function() {
+ return this.buf.substr(this.pos, 1);
+};
+
+/**
+ * Return the next single character in the buffer and advance the parse
+ * position one byte.
+ *
+ * @return {string} The next character in the buffer.
+ */
+hterm.VT.ParseState.prototype.consumeChar = function() {
+ return this.buf.substr(this.pos++, 1);
+};
+
+/**
+ * Return true if the buffer is empty, or the position is past the end.
+ */
+hterm.VT.ParseState.prototype.isComplete = function() {
+ return this.buf == null || this.buf.length <= this.pos;
+};
+
+/**
+ * Reset the VT back to baseline state.
+ */
+hterm.VT.prototype.reset = function() {
+ this.G0 = this.G1 = this.G2 = this.G3 =
+ this.characterMaps.getMap('B');
+
+ this.GL = 'G0';
+ this.GR = 'G0';
+
+ this.mouseReport = this.MOUSE_REPORT_DISABLED;
+ this.mouseCoordinates = this.MOUSE_COORDINATES_X10;
+ this.lastMouseDragResponse_ = null;
+};
+
+/**
+ * Handle terminal mouse events.
+ *
+ * See the "Mouse Tracking" section of [xterm].
+ */
+hterm.VT.prototype.onTerminalMouse_ = function(e) {
+ // Short circuit a few events to avoid unnecessary processing.
+ if (this.mouseReport == this.MOUSE_REPORT_DISABLED)
+ return;
+ else if (this.mouseReport != this.MOUSE_REPORT_DRAG && e.type == 'mousemove')
+ return;
+
+ // Temporary storage for our response.
+ var response;
+
+ // Modifier key state.
+ var mod = 0;
+ if (this.mouseReport != this.MOUSE_REPORT_PRESS) {
+ if (e.shiftKey)
+ mod |= 4;
+ if (e.metaKey || (this.terminal.keyboard.altIsMeta && e.altKey))
+ mod |= 8;
+ if (e.ctrlKey)
+ mod |= 16;
+ }
+
+ // X & Y coordinate reporting.
+ let x;
+ let y;
+ let limit = 255;
+ switch (this.mouseCoordinates) {
+ case this.MOUSE_COORDINATES_UTF8:
+ // UTF-8 mode is the same as X10 but with higher limits.
+ limit = 2047;
+ case this.MOUSE_COORDINATES_X10:
+ // X10 reports coordinates by encoding into strings.
+ x = String.fromCharCode(lib.f.clamp(e.terminalColumn + 32, 32, limit));
+ y = String.fromCharCode(lib.f.clamp(e.terminalRow + 32, 32, limit));
+ break;
+ case this.MOUSE_COORDINATES_SGR:
+ // SGR reports coordinates by transmitting the numbers directly.
+ x = e.terminalColumn;
+ y = e.terminalRow;
+ break;
+ }
+
+ switch (e.type) {
+ case 'wheel':
+ // Mouse wheel is treated as button 1 or 2 plus an additional 64.
+ b = (((e.deltaY * -1) > 0) ? 0 : 1) + 64;
+ b |= mod;
+ if (this.mouseCoordinates == this.MOUSE_COORDINATES_SGR) {
+ response = `\x1b[<${b};${x};${y}M`;
+ } else {
+ // X10 based modes (including UTF8) add 32 for legacy encoding reasons.
+ response = '\x1b[M' + String.fromCharCode(b + 32) + x + y;
+ }
+
+ // Keep the terminal from scrolling.
+ e.preventDefault();
+ break;
+
+ case 'mousedown':
+ // Buttons are encoded as button number.
+ var b = Math.min(e.button, 2);
+ // X10 based modes (including UTF8) add 32 for legacy encoding reasons.
+ if (this.mouseCoordinates != this.MOUSE_COORDINATES_SGR)
+ b += 32;
+
+ // And mix in the modifier keys.
+ b |= mod;
+
+ if (this.mouseCoordinates == this.MOUSE_COORDINATES_SGR)
+ response = `\x1b[<${b};${x};${y}M`;
+ else
+ response = '\x1b[M' + String.fromCharCode(b) + x + y;
+ break;
+
+ case 'mouseup':
+ if (this.mouseReport != this.MOUSE_REPORT_PRESS) {
+ if (this.mouseCoordinates == this.MOUSE_COORDINATES_SGR) {
+ // SGR mode can report the released button.
+ response = `\x1b[<${e.button};${x};${y}m`;
+ } else {
+ // X10 mode has no indication of which button was released.
+ response = '\x1b[M\x23' + x + y;
+ }
+ }
+ break;
+
+ case 'mousemove':
+ if (this.mouseReport == this.MOUSE_REPORT_DRAG && e.buttons) {
+ // Standard button bits. The XTerm protocol only reports the first
+ // button press (e.g. if left & right are pressed, right is ignored),
+ // and it only supports the first three buttons. If none of them are
+ // pressed, then XTerm flags it as a release. We'll do the same.
+ // X10 based modes (including UTF8) add 32 for legacy encoding reasons.
+ b = this.mouseCoordinates == this.MOUSE_COORDINATES_SGR ? 0 : 32;
+
+ // Priority here matches XTerm: left, middle, right.
+ if (e.buttons & 0x1) {
+ // Report left button.
+ b += 0;
+ } else if (e.buttons & 0x4) {
+ // Report middle button.
+ b += 1;
+ } else if (e.buttons & 0x2) {
+ // Report right button.
+ b += 2;
+ } else {
+ // Release higher buttons.
+ b += 3;
+ }
+
+ // Add 32 to indicate mouse motion.
+ b += 32;
+
+ // And mix in the modifier keys.
+ b |= mod;
+
+ if (this.mouseCoordinates == this.MOUSE_COORDINATES_SGR)
+ response = `\x1b[<${b};${x};${y}M`;
+ else
+ response = '\x1b[M' + String.fromCharCode(b) + x + y;
+
+ // If we were going to report the same cell because we moved pixels
+ // within, suppress the report. This is what xterm does and cuts
+ // down on duplicate messages.
+ if (this.lastMouseDragResponse_ == response)
+ response = '';
+ else
+ this.lastMouseDragResponse_ = response;
+ }
+
+ break;
+
+ case 'click':
+ case 'dblclick':
+ break;
+
+ default:
+ console.error('Unknown mouse event: ' + e.type, e);
+ break;
+ }
+
+ if (response)
+ this.terminal.io.sendString(response);
+};
+
+/**
+ * Interpret a string of characters, displaying the results on the associated
+ * terminal object.
+ *
+ * The buffer will be decoded according to the 'receive-encoding' preference.
+ */
+hterm.VT.prototype.interpret = function(buf) {
+ this.parseState_.resetBuf(this.decode(buf));
+
+ while (!this.parseState_.isComplete()) {
+ var func = this.parseState_.func;
+ var pos = this.parseState_.pos;
+ var buf = this.parseState_.buf;
+
+ this.parseState_.func.call(this, this.parseState_);
+
+ if (this.parseState_.func == func && this.parseState_.pos == pos &&
+ this.parseState_.buf == buf) {
+ throw 'Parser did not alter the state!';
+ }
+ }
+};
+
+/**
+ * Decode a string according to the 'receive-encoding' preference.
+ */
+hterm.VT.prototype.decode = function(str) {
+ if (this.characterEncoding == 'utf-8')
+ return this.decodeUTF8(str);
+
+ return str;
+};
+
+/**
+ * Encode a UTF-16 string as UTF-8.
+ *
+ * See also: https://en.wikipedia.org/wiki/UTF-16
+ */
+hterm.VT.prototype.encodeUTF8 = function(str) {
+ return lib.encodeUTF8(str);
+};
+
+/**
+ * Decode a UTF-8 string into UTF-16.
+ */
+hterm.VT.prototype.decodeUTF8 = function(str) {
+ return this.utf8Decoder_.decode(str);
+};
+
+/**
+ * Set the encoding of the terminal.
+ *
+ * @param {string} encoding The name of the encoding to set.
+ */
+hterm.VT.prototype.setEncoding = function(encoding) {
+ switch (encoding) {
+ default:
+ console.warn('Invalid value for "terminal-encoding": ' + encoding);
+ // Fall through.
+ case 'iso-2022':
+ this.codingSystemUtf8_ = false;
+ this.codingSystemLocked_ = false;
+ break;
+ case 'utf-8-locked':
+ this.codingSystemUtf8_ = true;
+ this.codingSystemLocked_ = true;
+ break;
+ case 'utf-8':
+ this.codingSystemUtf8_ = true;
+ this.codingSystemLocked_ = false;
+ break;
+ }
+
+ this.updateEncodingState_();
+};
+
+/**
+ * Refresh internal state when the encoding changes.
+ */
+hterm.VT.prototype.updateEncodingState_ = function() {
+ // If we're in UTF8 mode, don't suport 8-bit escape sequences as we'll never
+ // see those -- everything should be UTF8!
+ var cc1 = Object.keys(hterm.VT.CC1)
+ .filter((e) => !this.codingSystemUtf8_ || e.charCodeAt() < 0x80)
+ .map((e) => '\\x' + lib.f.zpad(e.charCodeAt().toString(16), 2))
+ .join('');
+ this.cc1Pattern_ = new RegExp(`[${cc1}]`);
+};
+
+/**
+ * The default parse function.
+ *
+ * This will scan the string for the first 1-byte control character (C0/C1
+ * characters from [CTRL]). Any plain text coming before the code will be
+ * printed to the terminal, then the control character will be dispatched.
+ */
+hterm.VT.prototype.parseUnknown_ = function(parseState) {
+ var self = this;
+
+ function print(str) {
+ if (!self.codingSystemUtf8_ && self[self.GL].GL)
+ str = self[self.GL].GL(str);
+
+ self.terminal.print(str);
+ }
+
+ // Search for the next contiguous block of plain text.
+ var buf = parseState.peekRemainingBuf();
+ var nextControl = buf.search(this.cc1Pattern_);
+
+ if (nextControl == 0) {
+ // We've stumbled right into a control character.
+ this.dispatch('CC1', buf.substr(0, 1), parseState);
+ parseState.advance(1);
+ return;
+ }
+
+ if (nextControl == -1) {
+ // There are no control characters in this string.
+ print(buf);
+ parseState.reset();
+ return;
+ }
+
+ print(buf.substr(0, nextControl));
+ this.dispatch('CC1', buf.substr(nextControl, 1), parseState);
+ parseState.advance(nextControl + 1);
+};
+
+/**
+ * Parse a Control Sequence Introducer code and dispatch it.
+ *
+ * See [CSI] for some useful information about these codes.
+ */
+hterm.VT.prototype.parseCSI_ = function(parseState) {
+ var ch = parseState.peekChar();
+ var args = parseState.args;
+
+ const finishParsing = () => {
+ // Resetting the arguments isn't strictly necessary, but it makes debugging
+ // less confusing (otherwise args will stick around until the next sequence
+ // that needs arguments).
+ parseState.resetArguments();
+ // We need to clear subargs since we explicitly set it.
+ parseState.subargs = null;
+ parseState.resetParseFunction();
+ };
+
+ if (ch >= '@' && ch <= '~') {
+ // This is the final character.
+ this.dispatch('CSI', this.leadingModifier_ + this.trailingModifier_ + ch,
+ parseState);
+ finishParsing();
+
+ } else if (ch == ';') {
+ // Parameter delimiter.
+ if (this.trailingModifier_) {
+ // Parameter delimiter after the trailing modifier. That's a paddlin'.
+ finishParsing();
+
+ } else {
+ if (!args.length) {
+ // They omitted the first param, we need to supply it.
+ args.push('');
+ }
+
+ args.push('');
+ }
+
+ } else if (ch >= '0' && ch <= '9' || ch == ':') {
+ // Next byte in the current parameter.
+
+ if (this.trailingModifier_) {
+ // Numeric parameter after the trailing modifier. That's a paddlin'.
+ finishParsing();
+ } else {
+ if (!args.length) {
+ args[0] = ch;
+ } else {
+ args[args.length - 1] += ch;
+ }
+
+ // Possible sub-parameters.
+ if (ch == ':')
+ parseState.argSetSubargs(args.length - 1);
+ }
+
+ } else if (ch >= ' ' && ch <= '?') {
+ // Modifier character.
+ if (!args.length) {
+ this.leadingModifier_ += ch;
+ } else {
+ this.trailingModifier_ += ch;
+ }
+
+ } else if (this.cc1Pattern_.test(ch)) {
+ // Control character.
+ this.dispatch('CC1', ch, parseState);
+
+ } else {
+ // Unexpected character in sequence, bail out.
+ finishParsing();
+ }
+
+ parseState.advance(1);
+};
+
+/**
+ * Skip over the string until the next String Terminator (ST, 'ESC \') or
+ * Bell (BEL, '\x07').
+ *
+ * The string is accumulated in parseState.args[0]. Make sure to reset the
+ * arguments (with parseState.resetArguments) before starting the parse.
+ *
+ * You can detect that parsing in complete by checking that the parse
+ * function has changed back to the default parse function.
+ *
+ * @return {boolean} If true, parsing is ongoing or complete. If false, we've
+ * exceeded the max string sequence.
+ */
+hterm.VT.prototype.parseUntilStringTerminator_ = function(parseState) {
+ var buf = parseState.peekRemainingBuf();
+ var args = parseState.args;
+ // Since we might modify parse state buffer locally, if we want to advance
+ // the parse state buffer later on, we need to know how many chars we added.
+ let bufInserted = 0;
+
+ if (!args.length) {
+ args[0] = '';
+ args[1] = new Date();
+ } else {
+ // If our saved buffer ends with an escape, it's because we were hoping
+ // it's an ST split across two buffers. Move it from our saved buffer
+ // to the start of our current buffer for processing anew.
+ if (args[0].slice(-1) == '\x1b') {
+ args[0] = args[0].slice(0, -1);
+ buf = '\x1b' + buf;
+ bufInserted = 1;
+ }
+ }
+
+ const nextTerminator = buf.search(/[\x1b\x07]/);
+ const terminator = buf[nextTerminator];
+ let foundTerminator;
+
+ // If the next escape we see is not a start of a ST, fall through. This will
+ // either be invalid (embedded escape), or we'll queue it up (wait for \\).
+ if (terminator == '\x1b' && buf[nextTerminator + 1] != '\\')
+ foundTerminator = false;
+ else
+ foundTerminator = (nextTerminator != -1);
+
+ if (!foundTerminator) {
+ // No terminator here, have to wait for the next string.
+
+ args[0] += buf;
+
+ var abortReason;
+
+ // Special case: If our buffering happens to split the ST (\e\\), we have to
+ // buffer the content temporarily. So don't reject a trailing escape here,
+ // instead we let it timeout or be rejected in the next pass.
+ if (terminator == '\x1b' && nextTerminator != buf.length - 1)
+ abortReason = 'embedded escape: ' + nextTerminator;
+
+ if (new Date() - args[1] > this.oscTimeLimit_)
+ abortReason = 'timeout expired: ' + (new Date() - args[1]);
+
+ if (abortReason) {
+ if (this.warnUnimplemented)
+ console.log('parseUntilStringTerminator_: aborting: ' + abortReason,
+ args[0]);
+ parseState.reset(args[0]);
+ return false;
+ }
+
+ parseState.advance(buf.length - bufInserted);
+ return true;
+ }
+
+ args[0] += buf.substr(0, nextTerminator);
+
+ parseState.resetParseFunction();
+ parseState.advance(nextTerminator +
+ (terminator == '\x1b' ? 2 : 1) - bufInserted);
+
+ return true;
+};
+
+/**
+ * Dispatch to the function that handles a given CC1, ESC, or CSI or VT52 code.
+ */
+hterm.VT.prototype.dispatch = function(type, code, parseState) {
+ var handler = hterm.VT[type][code];
+ if (!handler) {
+ if (this.warnUnimplemented)
+ console.warn('Unknown ' + type + ' code: ' + JSON.stringify(code));
+ return;
+ }
+
+ if (handler == hterm.VT.ignore) {
+ if (this.warnUnimplemented)
+ console.warn('Ignored ' + type + ' code: ' + JSON.stringify(code));
+ return;
+ }
+
+ if (parseState.subargs && !handler.supportsSubargs) {
+ if (this.warnUnimplemented)
+ console.warn('Ignored ' + type + ' code w/subargs: ' + JSON.stringify(code));
+ return;
+ }
+
+ if (type == 'CC1' && code > '\x7f' && !this.enable8BitControl) {
+ // It's kind of a hack to put this here, but...
+ //
+ // If we're dispatching a 'CC1' code, and it's got the eighth bit set,
+ // but we're not supposed to handle 8-bit codes? Just ignore it.
+ //
+ // This prevents an errant (DCS, '\x90'), (OSC, '\x9d'), (PM, '\x9e') or
+ // (APC, '\x9f') from locking up the terminal waiting for its expected
+ // (ST, '\x9c') or (BEL, '\x07').
+ console.warn('Ignoring 8-bit control code: 0x' +
+ code.charCodeAt(0).toString(16));
+ return;
+ }
+
+ handler.apply(this, [parseState, code]);
+};
+
+/**
+ * Set one of the ANSI defined terminal mode bits.
+ *
+ * Invoked in response to SM/RM.
+ *
+ * Unexpected and unimplemented values are silently ignored.
+ */
+hterm.VT.prototype.setANSIMode = function(code, state) {
+ if (code == 4) { // Insert Mode (IRM)
+ this.terminal.setInsertMode(state);
+ } else if (code == 20) { // Automatic Newline (LNM)
+ this.terminal.setAutoCarriageReturn(state);
+ } else if (this.warnUnimplemented) {
+ console.warn('Unimplemented ANSI Mode: ' + code);
+ }
+};
+
+/**
+ * Set or reset one of the DEC Private modes.
+ *
+ * Invoked in response to DECSET/DECRST.
+ */
+hterm.VT.prototype.setDECMode = function(code, state) {
+ switch (parseInt(code, 10)) {
+ case 1: // DECCKM
+ this.terminal.keyboard.applicationCursor = state;
+ break;
+
+ case 3: // DECCOLM
+ if (this.allowColumnWidthChanges_) {
+ this.terminal.setWidth(state ? 132 : 80);
+
+ this.terminal.clearHome();
+ this.terminal.setVTScrollRegion(null, null);
+ }
+ break;
+
+ case 5: // DECSCNM
+ this.terminal.setReverseVideo(state);
+ break;
+
+ case 6: // DECOM
+ this.terminal.setOriginMode(state);
+ break;
+
+ case 7: // DECAWM
+ this.terminal.setWraparound(state);
+ break;
+
+ case 9: // Report on mouse down events only (X10).
+ this.mouseReport = (
+ state ? this.MOUSE_REPORT_PRESS : this.MOUSE_REPORT_DISABLED);
+ this.terminal.syncMouseStyle();
+ break;
+
+ case 12: // Start blinking cursor
+ if (this.enableDec12)
+ this.terminal.setCursorBlink(state);
+ break;
+
+ case 25: // DECTCEM
+ this.terminal.setCursorVisible(state);
+ break;
+
+ case 30: // Show scrollbar
+ this.terminal.setScrollbarVisible(state);
+ break;
+
+ case 40: // Allow 80 - 132 (DECCOLM) Mode
+ this.terminal.allowColumnWidthChanges_ = state;
+ break;
+
+ case 45: // Reverse-wraparound Mode
+ this.terminal.setReverseWraparound(state);
+ break;
+
+ case 67: // Backarrow key sends backspace (DECBKM)
+ this.terminal.keyboard.backspaceSendsBackspace = state;
+ break;
+
+ case 1000: // Report on mouse clicks only (X11).
+ this.mouseReport = (
+ state ? this.MOUSE_REPORT_CLICK : this.MOUSE_REPORT_DISABLED);
+ this.terminal.syncMouseStyle();
+ break;
+
+ case 1002: // Report on mouse clicks and drags
+ this.mouseReport = (
+ state ? this.MOUSE_REPORT_DRAG : this.MOUSE_REPORT_DISABLED);
+ this.terminal.syncMouseStyle();
+ break;
+
+ case 1004: // Report on window focus change.
+ this.terminal.reportFocus = state;
+ break;
+
+ case 1005: // Extended coordinates in UTF-8 mode.
+ this.mouseCoordinates = (
+ state ? this.MOUSE_COORDINATES_UTF8 : this.MOUSE_COORDINATES_X10);
+ break;
+
+ case 1006: // Extended coordinates in SGR mode.
+ this.mouseCoordinates = (
+ state ? this.MOUSE_COORDINATES_SGR : this.MOUSE_COORDINATES_X10);
+ break;
+
+ case 1007: // Enable Alternate Scroll Mode.
+ this.terminal.scrollWheelArrowKeys_ = state;
+ break;
+
+ case 1010: // Scroll to bottom on tty output
+ this.terminal.scrollOnOutput = state;
+ break;
+
+ case 1011: // Scroll to bottom on key press
+ this.terminal.scrollOnKeystroke = state;
+ break;
+
+ case 1036: // Send ESC when Meta modifies a key
+ this.terminal.keyboard.metaSendsEscape = state;
+ break;
+
+ case 1039: // Send ESC when Alt modifies a key
+ if (state) {
+ if (!this.terminal.keyboard.previousAltSendsWhat_) {
+ this.terminal.keyboard.previousAltSendsWhat_ =
+ this.terminal.keyboard.altSendsWhat;
+ this.terminal.keyboard.altSendsWhat = 'escape';
+ }
+ } else if (this.terminal.keyboard.previousAltSendsWhat_) {
+ this.terminal.keyboard.altSendsWhat =
+ this.terminal.keyboard.previousAltSendsWhat_;
+ this.terminal.keyboard.previousAltSendsWhat_ = null;
+ }
+ break;
+
+ case 47: // Use Alternate Screen Buffer
+ case 1047:
+ this.terminal.setAlternateMode(state);
+ break;
+
+ case 1048: // Save cursor as in DECSC.
+ if (state)
+ this.terminal.saveCursorAndState();
+ else
+ this.terminal.restoreCursorAndState();
+ break;
+
+ case 1049: // 1047 + 1048 + clear.
+ if (state) {
+ this.terminal.saveCursorAndState();
+ this.terminal.setAlternateMode(state);
+ this.terminal.clear();
+ } else {
+ this.terminal.setAlternateMode(state);
+ this.terminal.restoreCursorAndState();
+ }
+
+ break;
+
+ case 2004: // Bracketed paste mode.
+ this.terminal.setBracketedPaste(state);
+ break;
+
+ default:
+ if (this.warnUnimplemented)
+ console.warn('Unimplemented DEC Private Mode: ' + code);
+ break;
+ }
+};
+
+/**
+ * Function shared by control characters and escape sequences that are
+ * ignored.
+ */
+hterm.VT.ignore = function() {};
+
+/**
+ * Collection of control characters expressed in a single byte.
+ *
+ * This includes the characters from the C0 and C1 sets (see [CTRL]) that we
+ * care about. Two byte versions of the C1 codes are defined in the
+ * hterm.VT.ESC collection.
+ *
+ * The 'CC1' mnemonic here refers to the fact that these are one-byte Control
+ * Codes. It's only used in this source file and not defined in any of the
+ * referenced documents.
+ */
+hterm.VT.CC1 = {};
+
+/**
+ * Collection of two-byte and three-byte sequences starting with ESC.
+ */
+hterm.VT.ESC = {};
+
+/**
+ * Collection of CSI (Control Sequence Introducer) sequences.
+ *
+ * These sequences begin with 'ESC [', and may take zero or more arguments.
+ */
+hterm.VT.CSI = {};
+
+/**
+ * Collection of OSC (Operating System Control) sequences.
+ *
+ * These sequences begin with 'ESC ]', followed by a function number and a
+ * string terminated by either ST or BEL.
+ */
+hterm.VT.OSC = {};
+
+/**
+ * Collection of VT52 sequences.
+ *
+ * When in VT52 mode, other sequences are disabled.
+ */
+hterm.VT.VT52 = {};
+
+/**
+ * Null (NUL).
+ *
+ * Silently ignored.
+ */
+hterm.VT.CC1['\x00'] = hterm.VT.ignore;
+
+/**
+ * Enquiry (ENQ).
+ *
+ * Transmit answerback message.
+ *
+ * The default answerback message in xterm is an empty string, so we just
+ * ignore this.
+ */
+hterm.VT.CC1['\x05'] = hterm.VT.ignore;
+
+/**
+ * Ring Bell (BEL).
+ */
+hterm.VT.CC1['\x07'] = function() {
+ this.terminal.ringBell();
+};
+
+/**
+ * Backspace (BS).
+ *
+ * Move the cursor to the left one character position, unless it is at the
+ * left margin, in which case no action occurs.
+ */
+hterm.VT.CC1['\x08'] = function() {
+ this.terminal.cursorLeft(1);
+};
+
+/**
+ * Horizontal Tab (HT).
+ *
+ * Move the cursor to the next tab stop, or to the right margin if no further
+ * tab stops are present on the line.
+ */
+hterm.VT.CC1['\x09'] = function() {
+ this.terminal.forwardTabStop();
+};
+
+/**
+ * Line Feed (LF).
+ *
+ * This code causes a line feed or a new line operation. See Automatic
+ * Newline (LNM).
+ */
+hterm.VT.CC1['\x0a'] = function() {
+ this.terminal.formFeed();
+};
+
+/**
+ * Vertical Tab (VT).
+ *
+ * Interpreted as LF.
+ */
+hterm.VT.CC1['\x0b'] = hterm.VT.CC1['\x0a'];
+
+/**
+ * Form Feed (FF).
+ *
+ * Interpreted as LF.
+ */
+hterm.VT.CC1['\x0c'] = hterm.VT.CC1['\x0a'];
+
+/**
+ * Carriage Return (CR).
+ *
+ * Move cursor to the left margin on the current line.
+ */
+hterm.VT.CC1['\x0d'] = function() {
+ this.terminal.setCursorColumn(0);
+};
+
+/**
+ * Shift Out (SO), aka Lock Shift 0 (LS1).
+ *
+ * Invoke G1 character set in GL.
+ */
+hterm.VT.CC1['\x0e'] = function() {
+ this.GL = 'G1';
+};
+
+/**
+ * Shift In (SI), aka Lock Shift 0 (LS0).
+ *
+ * Invoke G0 character set in GL.
+ */
+hterm.VT.CC1['\x0f'] = function() {
+ this.GL = 'G0';
+};
+
+/**
+ * Transmit On (XON).
+ *
+ * Not currently implemented.
+ *
+ * TODO(rginda): Implement?
+ */
+hterm.VT.CC1['\x11'] = hterm.VT.ignore;
+
+/**
+ * Transmit Off (XOFF).
+ *
+ * Not currently implemented.
+ *
+ * TODO(rginda): Implement?
+ */
+hterm.VT.CC1['\x13'] = hterm.VT.ignore;
+
+/**
+ * Cancel (CAN).
+ *
+ * If sent during a control sequence, the sequence is immediately terminated
+ * and not executed.
+ *
+ * It also causes the error character to be displayed.
+ */
+hterm.VT.CC1['\x18'] = function(parseState) {
+ // If we've shifted in the G1 character set, shift it back out to
+ // the default character set.
+ if (this.GL == 'G1') {
+ this.GL = 'G0';
+ }
+ parseState.resetParseFunction();
+ this.terminal.print('?');
+};
+
+/**
+ * Substitute (SUB).
+ *
+ * Interpreted as CAN.
+ */
+hterm.VT.CC1['\x1a'] = hterm.VT.CC1['\x18'];
+
+/**
+ * Escape (ESC).
+ */
+hterm.VT.CC1['\x1b'] = function(parseState) {
+ function parseESC(parseState) {
+ var ch = parseState.consumeChar();
+
+ if (ch == '\x1b')
+ return;
+
+ this.dispatch('ESC', ch, parseState);
+
+ if (parseState.func == parseESC)
+ parseState.resetParseFunction();
+ }
+
+ parseState.func = parseESC;
+};
+
+/**
+ * Delete (DEL).
+ */
+hterm.VT.CC1['\x7f'] = hterm.VT.ignore;
+
+// 8 bit control characters and their two byte equivalents, below...
+
+/**
+ * Index (IND).
+ *
+ * Like newline, only keep the X position
+ */
+hterm.VT.CC1['\x84'] =
+hterm.VT.ESC['D'] = function() {
+ this.terminal.lineFeed();
+};
+
+/**
+ * Next Line (NEL).
+ *
+ * Like newline, but doesn't add lines.
+ */
+hterm.VT.CC1['\x85'] =
+hterm.VT.ESC['E'] = function() {
+ this.terminal.setCursorColumn(0);
+ this.terminal.cursorDown(1);
+};
+
+/**
+ * Horizontal Tabulation Set (HTS).
+ */
+hterm.VT.CC1['\x88'] =
+hterm.VT.ESC['H'] = function() {
+ this.terminal.setTabStop(this.terminal.getCursorColumn());
+};
+
+/**
+ * Reverse Index (RI).
+ *
+ * Move up one line.
+ */
+hterm.VT.CC1['\x8d'] =
+hterm.VT.ESC['M'] = function() {
+ this.terminal.reverseLineFeed();
+};
+
+/**
+ * Single Shift 2 (SS2).
+ *
+ * Select of G2 Character Set for the next character only.
+ *
+ * Not currently implemented.
+ */
+hterm.VT.CC1['\x8e'] =
+hterm.VT.ESC['N'] = hterm.VT.ignore;
+
+/**
+ * Single Shift 3 (SS3).
+ *
+ * Select of G3 Character Set for the next character only.
+ *
+ * Not currently implemented.
+ */
+hterm.VT.CC1['\x8f'] =
+hterm.VT.ESC['O'] = hterm.VT.ignore;
+
+/**
+ * Device Control String (DCS).
+ *
+ * Indicate a DCS sequence. See Device-Control functions in [XTERM].
+ * Not currently implemented.
+ *
+ * TODO(rginda): Consider implementing DECRQSS, the rest don't seem applicable.
+ */
+hterm.VT.CC1['\x90'] =
+hterm.VT.ESC['P'] = function(parseState) {
+ parseState.resetArguments();
+ parseState.func = this.parseUntilStringTerminator_;
+};
+
+/**
+ * Start of Guarded Area (SPA).
+ *
+ * Will not implement.
+ */
+hterm.VT.CC1['\x96'] =
+hterm.VT.ESC['V'] = hterm.VT.ignore;
+
+/**
+ * End of Guarded Area (EPA).
+ *
+ * Will not implement.
+ */
+hterm.VT.CC1['\x97'] =
+hterm.VT.ESC['W'] = hterm.VT.ignore;
+
+/**
+ * Start of String (SOS).
+ *
+ * Will not implement.
+ */
+hterm.VT.CC1['\x98'] =
+hterm.VT.ESC['X'] = hterm.VT.ignore;
+
+/**
+ * Single Character Introducer (SCI, also DECID).
+ *
+ * Return Terminal ID. Obsolete form of 'ESC [ c' (DA).
+ */
+hterm.VT.CC1['\x9a'] =
+hterm.VT.ESC['Z'] = function() {
+ this.terminal.io.sendString('\x1b[?1;2c');
+};
+
+/**
+ * Control Sequence Introducer (CSI).
+ *
+ * The lead into most escape sequences. See [CSI].
+ */
+hterm.VT.CC1['\x9b'] =
+hterm.VT.ESC['['] = function(parseState) {
+ parseState.resetArguments();
+ this.leadingModifier_ = '';
+ this.trailingModifier_ = '';
+ parseState.func = this.parseCSI_;
+};
+
+/**
+ * String Terminator (ST).
+ *
+ * Used to terminate DCS/OSC/PM/APC commands which may take string arguments.
+ *
+ * We don't directly handle it here, as it's only used to terminate other
+ * sequences. See the 'parseUntilStringTerminator_' method.
+ */
+hterm.VT.CC1['\x9c'] =
+hterm.VT.ESC['\\'] = hterm.VT.ignore;
+
+/**
+ * Operating System Command (OSC).
+ *
+ * Commands relating to the operating system.
+ */
+hterm.VT.CC1['\x9d'] =
+hterm.VT.ESC[']'] = function(parseState) {
+ parseState.resetArguments();
+
+ function parseOSC(parseState) {
+ if (!this.parseUntilStringTerminator_(parseState)) {
+ // The string sequence was too long.
+ return;
+ }
+
+ if (parseState.func == parseOSC) {
+ // We're not done parsing the string yet.
+ return;
+ }
+
+ // We're done.
+ var ary = parseState.args[0].match(/^(\d+);(.*)$/);
+ if (ary) {
+ parseState.args[0] = ary[2];
+ this.dispatch('OSC', ary[1], parseState);
+ } else {
+ console.warn('Invalid OSC: ' + JSON.stringify(parseState.args[0]));
+ }
+
+ // Resetting the arguments isn't strictly necessary, but it makes debugging
+ // less confusing (otherwise args will stick around until the next sequence
+ // that needs arguments).
+ parseState.resetArguments();
+ }
+
+ parseState.func = parseOSC;
+};
+
+/**
+ * Privacy Message (PM).
+ *
+ * Will not implement.
+ */
+hterm.VT.CC1['\x9e'] =
+hterm.VT.ESC['^'] = function(parseState) {
+ parseState.resetArguments();
+ parseState.func = this.parseUntilStringTerminator_;
+};
+
+/**
+ * Application Program Control (APC).
+ *
+ * Will not implement.
+ */
+hterm.VT.CC1['\x9f'] =
+hterm.VT.ESC['_'] = function(parseState) {
+ parseState.resetArguments();
+ parseState.func = this.parseUntilStringTerminator_;
+};
+
+/**
+ * ESC \x20 - Unclear to me where these originated, possibly in xterm.
+ *
+ * Not currently implemented:
+ * ESC \x20 F - Select 7 bit escape codes in responses (S7C1T).
+ * ESC \x20 G - Select 8 bit escape codes in responses (S8C1T).
+ * NB: We currently assume S7C1T always.
+ *
+ * Will not implement:
+ * ESC \x20 L - Set ANSI conformance level 1.
+ * ESC \x20 M - Set ANSI conformance level 2.
+ * ESC \x20 N - Set ANSI conformance level 3.
+ */
+hterm.VT.ESC['\x20'] = function(parseState) {
+ parseState.func = function(parseState) {
+ var ch = parseState.consumeChar();
+ if (this.warnUnimplemented)
+ console.warn('Unimplemented sequence: ESC 0x20 ' + ch);
+ parseState.resetParseFunction();
+ };
+};
+
+/**
+ * DEC 'ESC #' sequences.
+ */
+hterm.VT.ESC['#'] = function(parseState) {
+ parseState.func = function(parseState) {
+ var ch = parseState.consumeChar();
+ if (ch == '8') {
+ // DEC Screen Alignment Test (DECALN).
+ this.terminal.setCursorPosition(0, 0);
+ this.terminal.fill('E');
+ }
+
+ parseState.resetParseFunction();
+ };
+};
+
+/**
+ * Designate Other Coding System (DOCS).
+ */
+hterm.VT.ESC['%'] = function(parseState) {
+ parseState.func = function(parseState) {
+ var ch = parseState.consumeChar();
+
+ // If we've locked the encoding, then just eat the bytes and return.
+ if (this.codingSystemLocked_) {
+ if (ch == '/')
+ parseState.consumeChar();
+ parseState.resetParseFunction();
+ return;
+ }
+
+ // Process the encoding requests.
+ switch (ch) {
+ case '@':
+ // Switch to ECMA 35.
+ this.setEncoding('iso-2022');
+ break;
+
+ case 'G':
+ // Switch to UTF-8.
+ this.setEncoding('utf-8');
+ break;
+
+ case '/':
+ // One way transition to something else.
+ ch = parseState.consumeChar();
+ switch (ch) {
+ case 'G': // UTF-8 Level 1.
+ case 'H': // UTF-8 Level 2.
+ case 'I': // UTF-8 Level 3.
+ // We treat all UTF-8 levels the same.
+ this.setEncoding('utf-8-locked');
+ break;
+
+ default:
+ if (this.warnUnimplemented)
+ console.warn('Unknown ESC % / argument: ' + JSON.stringify(ch));
+ break;
+ }
+ break;
+
+ default:
+ if (this.warnUnimplemented)
+ console.warn('Unknown ESC % argument: ' + JSON.stringify(ch));
+ break;
+ }
+
+ parseState.resetParseFunction();
+ };
+};
+
+/**
+ * Character Set Selection (SCS).
+ *
+ * ESC ( Ps - Set G0 character set (VT100).
+ * ESC ) Ps - Set G1 character set (VT220).
+ * ESC * Ps - Set G2 character set (VT220).
+ * ESC + Ps - Set G3 character set (VT220).
+ * ESC - Ps - Set G1 character set (VT300).
+ * ESC . Ps - Set G2 character set (VT300).
+ * ESC / Ps - Set G3 character set (VT300).
+ *
+ * All other sequences are echoed to the terminal.
+ */
+hterm.VT.ESC['('] =
+hterm.VT.ESC[')'] =
+hterm.VT.ESC['*'] =
+hterm.VT.ESC['+'] =
+hterm.VT.ESC['-'] =
+hterm.VT.ESC['.'] =
+hterm.VT.ESC['/'] = function(parseState, code) {
+ parseState.func = function(parseState) {
+ var ch = parseState.consumeChar();
+ if (ch == '\x1b') {
+ parseState.resetParseFunction();
+ parseState.func();
+ return;
+ }
+
+ var map = this.characterMaps.getMap(ch);
+ if (map !== undefined) {
+ if (code == '(') {
+ this.G0 = map;
+ } else if (code == ')' || code == '-') {
+ this.G1 = map;
+ } else if (code == '*' || code == '.') {
+ this.G2 = map;
+ } else if (code == '+' || code == '/') {
+ this.G3 = map;
+ }
+ } else if (this.warnUnimplemented) {
+ console.log('Invalid character set for "' + code + '": ' + ch);
+ }
+
+ parseState.resetParseFunction();
+ };
+};
+
+/**
+ * Back Index (DECBI).
+ *
+ * VT420 and up. Not currently implemented.
+ */
+hterm.VT.ESC['6'] = hterm.VT.ignore;
+
+/**
+ * Save Cursor (DECSC).
+ */
+hterm.VT.ESC['7'] = function() {
+ this.terminal.saveCursorAndState();
+};
+
+/**
+ * Restore Cursor (DECRC).
+ */
+hterm.VT.ESC['8'] = function() {
+ this.terminal.restoreCursorAndState();
+};
+
+/**
+ * Forward Index (DECFI).
+ *
+ * VT210 and up. Not currently implemented.
+ */
+hterm.VT.ESC['9'] = hterm.VT.ignore;
+
+/**
+ * Application keypad (DECKPAM).
+ */
+hterm.VT.ESC['='] = function() {
+ this.terminal.keyboard.applicationKeypad = true;
+};
+
+/**
+ * Normal keypad (DECKPNM).
+ */
+hterm.VT.ESC['>'] = function() {
+ this.terminal.keyboard.applicationKeypad = false;
+};
+
+/**
+ * Cursor to lower left corner of screen.
+ *
+ * Will not implement.
+ *
+ * This is only recognized by xterm when the hpLowerleftBugCompat resource is
+ * set.
+ */
+hterm.VT.ESC['F'] = hterm.VT.ignore;
+
+/**
+ * Full Reset (RIS).
+ */
+hterm.VT.ESC['c'] = function() {
+ this.terminal.reset();
+};
+
+/**
+ * Memory lock/unlock.
+ *
+ * Will not implement.
+ */
+hterm.VT.ESC['l'] =
+hterm.VT.ESC['m'] = hterm.VT.ignore;
+
+/**
+ * Lock Shift 2 (LS2)
+ *
+ * Invoke the G2 Character Set as GL.
+ */
+hterm.VT.ESC['n'] = function() {
+ this.GL = 'G2';
+};
+
+/**
+ * Lock Shift 3 (LS3)
+ *
+ * Invoke the G3 Character Set as GL.
+ */
+hterm.VT.ESC['o'] = function() {
+ this.GL = 'G3';
+};
+
+/**
+ * Lock Shift 2, Right (LS3R)
+ *
+ * Invoke the G3 Character Set as GR.
+ */
+hterm.VT.ESC['|'] = function() {
+ this.GR = 'G3';
+};
+
+/**
+ * Lock Shift 2, Right (LS2R)
+ *
+ * Invoke the G2 Character Set as GR.
+ */
+hterm.VT.ESC['}'] = function() {
+ this.GR = 'G2';
+};
+
+/**
+ * Lock Shift 1, Right (LS1R)
+ *
+ * Invoke the G1 Character Set as GR.
+ */
+hterm.VT.ESC['~'] = function() {
+ this.GR = 'G1';
+};
+
+/**
+ * Change icon name and window title.
+ *
+ * We only change the window title.
+ */
+hterm.VT.OSC['0'] = function(parseState) {
+ this.terminal.setWindowTitle(parseState.args[0]);
+};
+
+/**
+ * Change window title.
+ */
+hterm.VT.OSC['2'] = hterm.VT.OSC['0'];
+
+/**
+ * Set/read color palette.
+ */
+hterm.VT.OSC['4'] = function(parseState) {
+ // Args come in as a single 'index1;rgb1 ... ;indexN;rgbN' string.
+ // We split on the semicolon and iterate through the pairs.
+ var args = parseState.args[0].split(';');
+
+ var pairCount = parseInt(args.length / 2);
+ var colorPalette = this.terminal.getTextAttributes().colorPalette;
+ var responseArray = [];
+
+ for (var pairNumber = 0; pairNumber < pairCount; ++pairNumber) {
+ var colorIndex = parseInt(args[pairNumber * 2]);
+ var colorValue = args[pairNumber * 2 + 1];
+
+ if (colorIndex >= colorPalette.length)
+ continue;
+
+ if (colorValue == '?') {
+ // '?' means we should report back the current color value.
+ colorValue = lib.colors.rgbToX11(colorPalette[colorIndex]);
+ if (colorValue)
+ responseArray.push(colorIndex + ';' + colorValue);
+
+ continue;
+ }
+
+ colorValue = lib.colors.x11ToCSS(colorValue);
+ if (colorValue)
+ colorPalette[colorIndex] = colorValue;
+ }
+
+ if (responseArray.length)
+ this.terminal.io.sendString('\x1b]4;' + responseArray.join(';') + '\x07');
+};
+
+/**
+ * Hyperlinks.
+ *
+ * The first argument is optional and colon separated:
+ * id=<id>
+ * The second argument is the link itself.
+ *
+ * Calling with a non-blank URI starts it. A blank URI stops it.
+ *
+ * https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda
+ */
+hterm.VT.OSC['8'] = function(parseState) {
+ const args = parseState.args[0].split(';');
+ let id = null;
+ let uri = null;
+
+ if (args.length != 2 || args[1].length == 0) {
+ // Reset link.
+ } else {
+ // Pull out any colon separated parameters in the first argument.
+ const params = args[0].split(':');
+ id = '';
+ params.forEach((param) => {
+ const idx = param.indexOf('=');
+ if (idx == -1)
+ return;
+
+ const key = param.slice(0, idx);
+ const value = param.slice(idx + 1);
+ switch (key) {
+ case 'id':
+ id = value;
+ break;
+ default:
+ // Ignore unknown keys.
+ break;
+ }
+ });
+
+ // The URI is in the second argument.
+ uri = args[1];
+ }
+
+ const attrs = this.terminal.getTextAttributes();
+ attrs.uri = uri;
+ attrs.uriId = id;
+};
+
+/**
+ * iTerm2 growl notifications.
+ */
+hterm.VT.OSC['9'] = function(parseState) {
+ // This just dumps the entire string as the message.
+ hterm.notify({'body': parseState.args[0]});
+};
+
+/**
+ * Change VT100 text foreground color.
+ */
+hterm.VT.OSC['10'] = function(parseState) {
+ // Args come in as a single string, but extra args will chain to the following
+ // OSC sequences.
+ var args = parseState.args[0].split(';');
+ if (!args)
+ return;
+
+ var colorArg;
+ var colorX11 = lib.colors.x11ToCSS(args.shift());
+ if (colorX11)
+ this.terminal.setForegroundColor(colorX11);
+
+ if (args.length > 0) {
+ parseState.args[0] = args.join(';');
+ hterm.VT.OSC['11'].apply(this, [parseState]);
+ }
+};
+
+/**
+ * Change VT100 text background color.
+ */
+hterm.VT.OSC['11'] = function(parseState) {
+ // Args come in as a single string, but extra args will chain to the following
+ // OSC sequences.
+ var args = parseState.args[0].split(';');
+ if (!args)
+ return;
+
+ var colorArg;
+ var colorX11 = lib.colors.x11ToCSS(args.shift());
+ if (colorX11)
+ this.terminal.setBackgroundColor(colorX11);
+
+ if (args.length > 0) {
+ parseState.args[0] = args.join(';');
+ hterm.VT.OSC['12'].apply(this, [parseState]);
+ }
+};
+
+/**
+ * Change text cursor color.
+ */
+hterm.VT.OSC['12'] = function(parseState) {
+ // Args come in as a single string, but extra args will chain to the following
+ // OSC sequences.
+ var args = parseState.args[0].split(';');
+ if (!args)
+ return;
+
+ var colorArg;
+ var colorX11 = lib.colors.x11ToCSS(args.shift());
+ if (colorX11)
+ this.terminal.setCursorColor(colorX11);
+
+ /* Note: If we support OSC 13+, we'd chain it here.
+ if (args.length > 0) {
+ parseState.args[0] = args.join(';');
+ hterm.VT.OSC['13'].apply(this, [parseState]);
+ }
+ */
+};
+
+/**
+ * Set the cursor shape.
+ *
+ * Parameter is expected to be in the form "CursorShape=number", where number is
+ * one of:
+ *
+ * 0 - Block
+ * 1 - I-Beam
+ * 2 - Underline
+ *
+ * This is a bit of a de-facto standard supported by iTerm 2 and Konsole. See
+ * also: DECSCUSR.
+ *
+ * Invalid numbers will restore the cursor to the block shape.
+ */
+hterm.VT.OSC['50'] = function(parseState) {
+ var args = parseState.args[0].match(/CursorShape=(.)/i);
+ if (!args) {
+ console.warn('Could not parse OSC 50 args: ' + parseState.args[0]);
+ return;
+ }
+
+ switch (args[1]) {
+ case '1': // CursorShape=1: I-Beam.
+ this.terminal.setCursorShape(hterm.Terminal.cursorShape.BEAM);
+ break;
+
+ case '2': // CursorShape=2: Underline.
+ this.terminal.setCursorShape(hterm.Terminal.cursorShape.UNDERLINE);
+ break;
+
+ default: // CursorShape=0: Block.
+ this.terminal.setCursorShape(hterm.Terminal.cursorShape.BLOCK);
+ }
+};
+
+/**
+ * Set/read system clipboard.
+ *
+ * Read is not implemented due to security considerations. A remote app
+ * that is able to both write and read to the clipboard could essentially
+ * take over your session.
+ *
+ * The clipboard data will be decoded according to the 'receive-encoding'
+ * preference.
+ */
+hterm.VT.OSC['52'] = function(parseState) {
+ if (!this.enableClipboardWrite)
+ return;
+
+ // Args come in as a single 'clipboard;b64-data' string. The clipboard
+ // parameter is used to select which of the X clipboards to address. Since
+ // we're not integrating with X, we treat them all the same.
+ var args = parseState.args[0].match(/^[cps01234567]*;(.*)/);
+ if (!args)
+ return;
+
+ var data = window.atob(args[1]);
+ if (data)
+ this.terminal.copyStringToClipboard(this.decode(data));
+};
+
+/**
+ * Reset color palette.
+ */
+hterm.VT.OSC['104'] = function(parseState) {
+ const attrs = this.terminal.getTextAttributes();
+
+ // If there are no args, we reset the entire palette.
+ if (!parseState.args[0]) {
+ attrs.resetColorPalette();
+ return;
+ }
+
+ // Args come in as a single 'index1;index2;...;indexN' string.
+ // Split on the semicolon and iterate through the colors.
+ const args = parseState.args[0].split(';');
+ args.forEach((c) => attrs.resetColor(c));
+};
+
+/**
+ * Reset foreground color.
+ */
+hterm.VT.OSC['110'] = function(parseState) {
+ this.terminal.setForegroundColor();
+};
+
+/**
+ * Reset background color.
+ */
+hterm.VT.OSC['111'] = function(parseState) {
+ this.terminal.setBackgroundColor();
+};
+
+/**
+ * Reset text cursor color.
+ */
+hterm.VT.OSC['112'] = function(parseState) {
+ this.terminal.setCursorColor();
+};
+
+/**
+ * iTerm2 extended sequences.
+ *
+ * We only support image display atm.
+ */
+hterm.VT.OSC['1337'] = function(parseState) {
+ // Args come in as a set of key value pairs followed by data.
+ // File=name=<base64>;size=123;inline=1:<base64 data>
+ let args = parseState.args[0].match(/^File=([^:]*):([\s\S]*)$/m);
+ if (!args) {
+ if (this.warnUnimplemented)
+ console.log(`iTerm2 1337: unsupported sequence: ${args[1]}`);
+ return;
+ }
+
+ const options = {
+ name: '',
+ size: 0,
+ preserveAspectRatio: true,
+ inline: false,
+ width: 'auto',
+ height: 'auto',
+ align: 'left',
+ buffer: lib.codec.stringToCodeUnitArray(atob(args[2]), Uint8Array).buffer,
+ };
+ // Walk the "key=value;" sets.
+ args[1].split(';').forEach((ele) => {
+ const kv = ele.match(/^([^=]+)=(.*)$/m);
+ if (!kv)
+ return;
+
+ // Sanitize values nicely.
+ switch (kv[1]) {
+ case 'name':
+ try {
+ options.name = window.atob(kv[2]);
+ } catch (e) {}
+ break;
+ case 'size':
+ try {
+ options.size = parseInt(kv[2]);
+ } catch (e) {}
+ break;
+ case 'width':
+ options.width = kv[2];
+ break;
+ case 'height':
+ options.height = kv[2];
+ break;
+ case 'preserveAspectRatio':
+ options.preserveAspectRatio = !(kv[2] == '0');
+ break;
+ case 'inline':
+ options.inline = !(kv[2] == '0');
+ break;
+ // hterm-specific keys.
+ case 'align':
+ options.align = kv[2];
+ break;
+ default:
+ // Ignore unknown keys. Don't want remote stuffing our JS env.
+ break;
+ }
+ });
+
+ // This is a bit of a hack. If the buffer has data following the image, we
+ // need to delay processing of it until after we've finished with the image.
+ // Otherwise while we wait for the the image to load asynchronously, the new
+ // text data will intermingle with the image.
+ if (options.inline) {
+ const io = this.terminal.io;
+ const queued = parseState.peekRemainingBuf();
+ parseState.advance(queued.length);
+ this.terminal.displayImage(options);
+ io.writeUTF8(queued);
+ } else
+ this.terminal.displayImage(options);
+};
+
+/**
+ * URxvt perl modules.
+ *
+ * This is the escape system used by rxvt-unicode and its perl modules.
+ * Obviously we don't support perl or custom modules, so we list a few common
+ * ones that we find useful.
+ *
+ * Technically there is no format here, but most modules obey:
+ * <module name>;<module args, usually ; delimited>
+ */
+hterm.VT.OSC['777'] = function(parseState) {
+ var ary;
+ var urxvtMod = parseState.args[0].split(';', 1)[0];
+
+ switch (urxvtMod) {
+ case 'notify':
+ // Format:
+ // notify;title;message
+ var title, message;
+ ary = parseState.args[0].match(/^[^;]+;([^;]*)(;([\s\S]*))?$/);
+ if (ary) {
+ title = ary[1];
+ message = ary[3];
+ }
+ hterm.notify({'title': title, 'body': message});
+ break;
+
+ default:
+ console.warn('Unknown urxvt module: ' + parseState.args[0]);
+ break;
+ }
+};
+
+/**
+ * Insert (blank) characters (ICH).
+ */
+hterm.VT.CSI['@'] = function(parseState) {
+ this.terminal.insertSpace(parseState.iarg(0, 1));
+};
+
+/**
+ * Cursor Up (CUU).
+ */
+hterm.VT.CSI['A'] = function(parseState) {
+ this.terminal.cursorUp(parseState.iarg(0, 1));
+};
+
+/**
+ * Cursor Down (CUD).
+ */
+hterm.VT.CSI['B'] = function(parseState) {
+ this.terminal.cursorDown(parseState.iarg(0, 1));
+};
+
+/**
+ * Cursor Forward (CUF).
+ */
+hterm.VT.CSI['C'] = function(parseState) {
+ this.terminal.cursorRight(parseState.iarg(0, 1));
+};
+
+/**
+ * Cursor Backward (CUB).
+ */
+hterm.VT.CSI['D'] = function(parseState) {
+ this.terminal.cursorLeft(parseState.iarg(0, 1));
+};
+
+/**
+ * Cursor Next Line (CNL).
+ *
+ * This is like Cursor Down, except the cursor moves to the beginning of the
+ * line as well.
+ */
+hterm.VT.CSI['E'] = function(parseState) {
+ this.terminal.cursorDown(parseState.iarg(0, 1));
+ this.terminal.setCursorColumn(0);
+};
+
+/**
+ * Cursor Preceding Line (CPL).
+ *
+ * This is like Cursor Up, except the cursor moves to the beginning of the
+ * line as well.
+ */
+hterm.VT.CSI['F'] = function(parseState) {
+ this.terminal.cursorUp(parseState.iarg(0, 1));
+ this.terminal.setCursorColumn(0);
+};
+
+/**
+ * Cursor Horizontal Absolute (CHA).
+ *
+ * Xterm calls this Cursor Character Absolute.
+ */
+hterm.VT.CSI['G'] = function(parseState) {
+ this.terminal.setCursorColumn(parseState.iarg(0, 1) - 1);
+};
+
+/**
+ * Cursor Position (CUP).
+ */
+hterm.VT.CSI['H'] = function(parseState) {
+ this.terminal.setCursorPosition(parseState.iarg(0, 1) - 1,
+ parseState.iarg(1, 1) - 1);
+};
+
+/**
+ * Cursor Forward Tabulation (CHT).
+ */
+hterm.VT.CSI['I'] = function(parseState) {
+ var count = parseState.iarg(0, 1);
+ count = lib.f.clamp(count, 1, this.terminal.screenSize.width);
+ for (var i = 0; i < count; i++) {
+ this.terminal.forwardTabStop();
+ }
+};
+
+/**
+ * Erase in Display (ED, DECSED).
+ */
+hterm.VT.CSI['J'] =
+hterm.VT.CSI['?J'] = function(parseState, code) {
+ var arg = parseState.args[0];
+
+ if (!arg || arg == 0) {
+ this.terminal.eraseBelow();
+ } else if (arg == 1) {
+ this.terminal.eraseAbove();
+ } else if (arg == 2) {
+ this.terminal.clear();
+ } else if (arg == 3) {
+ if (this.enableCsiJ3) {
+ this.terminal.clearScrollback();
+ }
+ }
+};
+
+/**
+ * Erase in line (EL, DECSEL).
+ */
+hterm.VT.CSI['K'] =
+hterm.VT.CSI['?K'] = function(parseState, code) {
+ var arg = parseState.args[0];
+
+ if (!arg || arg == 0) {
+ this.terminal.eraseToRight();
+ } else if (arg == 1) {
+ this.terminal.eraseToLeft();
+ } else if (arg == 2) {
+ this.terminal.eraseLine();
+ }
+};
+
+/**
+ * Insert Lines (IL).
+ */
+hterm.VT.CSI['L'] = function(parseState) {
+ this.terminal.insertLines(parseState.iarg(0, 1));
+};
+
+/**
+ * Delete Lines (DL).
+ */
+hterm.VT.CSI['M'] = function(parseState) {
+ this.terminal.deleteLines(parseState.iarg(0, 1));
+};
+
+/**
+ * Delete Characters (DCH).
+ *
+ * This command shifts the line contents left, starting at the cursor position.
+ */
+hterm.VT.CSI['P'] = function(parseState) {
+ this.terminal.deleteChars(parseState.iarg(0, 1));
+};
+
+/**
+ * Scroll Up (SU).
+ */
+hterm.VT.CSI['S'] = function(parseState) {
+ this.terminal.vtScrollUp(parseState.iarg(0, 1));
+};
+
+/**
+ * Scroll Down (SD).
+ * Also 'Initiate highlight mouse tracking'. Will not implement this part.
+ */
+hterm.VT.CSI['T'] = function(parseState) {
+ if (parseState.args.length <= 1)
+ this.terminal.vtScrollDown(parseState.iarg(0, 1));
+};
+
+/**
+ * Reset one or more features of the title modes to the default value.
+ *
+ * ESC [ > Ps T
+ *
+ * Normally, "reset" disables the feature. It is possible to disable the
+ * ability to reset features by compiling a different default for the title
+ * modes into xterm.
+ *
+ * Ps values:
+ * 0 - Do not set window/icon labels using hexadecimal.
+ * 1 - Do not query window/icon labels using hexadecimal.
+ * 2 - Do not set window/icon labels using UTF-8.
+ * 3 - Do not query window/icon labels using UTF-8.
+ *
+ * Will not implement.
+ */
+hterm.VT.CSI['>T'] = hterm.VT.ignore;
+
+/**
+ * Erase Characters (ECH).
+ */
+hterm.VT.CSI['X'] = function(parseState) {
+ this.terminal.eraseToRight(parseState.iarg(0, 1));
+};
+
+/**
+ * Cursor Backward Tabulation (CBT).
+ */
+hterm.VT.CSI['Z'] = function(parseState) {
+ var count = parseState.iarg(0, 1);
+ count = lib.f.clamp(count, 1, this.terminal.screenSize.width);
+ for (var i = 0; i < count; i++) {
+ this.terminal.backwardTabStop();
+ }
+};
+
+/**
+ * Character Position Absolute (HPA).
+ *
+ * Same as Cursor Horizontal Absolute (CHA).
+ */
+hterm.VT.CSI['`'] = hterm.VT.CSI['G'];
+
+/**
+ * Character Position Relative (HPR).
+ */
+hterm.VT.CSI['a'] = function(parseState) {
+ this.terminal.setCursorColumn(this.terminal.getCursorColumn() +
+ parseState.iarg(0, 1));
+};
+
+/**
+ * Repeat the preceding graphic character.
+ *
+ * Not currently implemented.
+ */
+hterm.VT.CSI['b'] = hterm.VT.ignore;
+
+/**
+ * Send Device Attributes (Primary DA).
+ *
+ * TODO(rginda): This is hardcoded to send back 'VT100 with Advanced Video
+ * Option', but it may be more correct to send a VT220 response once
+ * we fill out the 'Not currently implemented' parts.
+ */
+hterm.VT.CSI['c'] = function(parseState) {
+ if (!parseState.args[0] || parseState.args[0] == 0) {
+ this.terminal.io.sendString('\x1b[?1;2c');
+ }
+};
+
+/**
+ * Send Device Attributes (Secondary DA).
+ *
+ * TODO(rginda): This is hardcoded to send back 'VT100' but it may be more
+ * correct to send a VT220 response once we fill out more 'Not currently
+ * implemented' parts.
+ */
+hterm.VT.CSI['>c'] = function(parseState) {
+ this.terminal.io.sendString('\x1b[>0;256;0c');
+};
+
+/**
+ * Line Position Absolute (VPA).
+ */
+hterm.VT.CSI['d'] = function(parseState) {
+ this.terminal.setAbsoluteCursorRow(parseState.iarg(0, 1) - 1);
+};
+
+/**
+ * Horizontal and Vertical Position (HVP).
+ *
+ * Same as Cursor Position (CUP).
+ */
+hterm.VT.CSI['f'] = hterm.VT.CSI['H'];
+
+/**
+ * Tab Clear (TBC).
+ */
+hterm.VT.CSI['g'] = function(parseState) {
+ if (!parseState.args[0] || parseState.args[0] == 0) {
+ // Clear tab stop at cursor.
+ this.terminal.clearTabStopAtCursor(false);
+ } else if (parseState.args[0] == 3) {
+ // Clear all tab stops.
+ this.terminal.clearAllTabStops();
+ }
+};
+
+/**
+ * Set Mode (SM).
+ */
+hterm.VT.CSI['h'] = function(parseState) {
+ for (var i = 0; i < parseState.args.length; i++) {
+ this.setANSIMode(parseState.args[i], true);
+ }
+};
+
+/**
+ * DEC Private Mode Set (DECSET).
+ */
+hterm.VT.CSI['?h'] = function(parseState) {
+ for (var i = 0; i < parseState.args.length; i++) {
+ this.setDECMode(parseState.args[i], true);
+ }
+};
+
+/**
+ * Media Copy (MC).
+ * Media Copy (MC, DEC Specific).
+ *
+ * These commands control the printer. Will not implement.
+ */
+hterm.VT.CSI['i'] =
+hterm.VT.CSI['?i'] = hterm.VT.ignore;
+
+/**
+ * Reset Mode (RM).
+ */
+hterm.VT.CSI['l'] = function(parseState) {
+ for (var i = 0; i < parseState.args.length; i++) {
+ this.setANSIMode(parseState.args[i], false);
+ }
+};
+
+/**
+ * DEC Private Mode Reset (DECRST).
+ */
+hterm.VT.CSI['?l'] = function(parseState) {
+ for (var i = 0; i < parseState.args.length; i++) {
+ this.setDECMode(parseState.args[i], false);
+ }
+};
+
+/**
+ * Parse extended SGR 38/48 sequences.
+ *
+ * This deals with the various ISO 8613-6 forms, and with legacy xterm forms
+ * that are common in the wider application world.
+ *
+ * @param {hterm.VT.ParseState} parseState The current input state.
+ * @param {number} i The argument in parseState to start processing.
+ * @param {hterm.TextAttributes} attrs The current text attributes.
+ * @return {Object} The skipCount member defines how many arguments to skip
+ * (i.e. how many were processed), and the color member is the color that
+ * was successfully processed, or undefined if not.
+ */
+hterm.VT.prototype.parseSgrExtendedColors = function(parseState, i, attrs) {
+ let ary;
+ let usedSubargs;
+
+ if (parseState.argHasSubargs(i)) {
+ // The ISO 8613-6 compliant form.
+ // e.g. 38:[color choice]:[arg1]:[arg2]:...
+ ary = parseState.args[i].split(':');
+ ary.shift(); // Remove "38".
+ usedSubargs = true;
+ } else if (parseState.argHasSubargs(i + 1)) {
+ // The xterm form which isn't ISO 8613-6 compliant. Not many emulators
+ // support this, and others actively do not want to. We'll ignore it so
+ // at least the rest of the stream works correctly. e.g. 38;2:R:G:B
+ // We return 0 here so we only skip the "38" ... we can't be confident the
+ // next arg is actually supposed to be part of it vs a typo where the next
+ // arg is legit.
+ return {skipCount: 0};
+ } else {
+ // The xterm form which isn't ISO 8613-6 compliant, but many emulators
+ // support, and many applications rely on.
+ // e.g. 38;2;R;G;B
+ ary = parseState.args.slice(i + 1);
+ usedSubargs = false;
+ }
+
+ // Figure out which form to parse.
+ switch (parseInt(ary[0])) {
+ default: // Unknown.
+ case 0: // Implementation defined. We ignore it.
+ return {skipCount: 0};
+
+ case 1: { // Transparent color.
+ // Require ISO 8613-6 form.
+ if (!usedSubargs)
+ return {skipCount: 0};
+
+ return {
+ color: 'rgba(0, 0, 0, 0)',
+ skipCount: 0,
+ };
+ }
+
+ case 2: { // RGB color.
+ // Skip over the color space identifier, if it exists.
+ let start;
+ if (usedSubargs) {
+ // The ISO 8613-6 compliant form:
+ // 38:2:<color space id>:R:G:B[:...]
+ // The xterm form isn't ISO 8613-6 compliant.
+ // 38:2:R:G:B
+ // Since the ISO 8613-6 form requires at least 5 arguments,
+ // we can still support the xterm form unambiguously.
+ if (ary.length == 4)
+ start = 1;
+ else
+ start = 2;
+ } else {
+ // The legacy xterm form: 38;2;R;G;B
+ start = 1;
+ }
+
+ // We need at least 3 args for RGB. If we don't have them, assume this
+ // sequence is corrupted, so don't eat anything more.
+ // We ignore more than 3 args on purpose since ISO 8613-6 defines some,
+ // and we don't care about them.
+ if (ary.length < start + 3)
+ return {skipCount: 0};
+
+ const r = parseState.parseInt(ary[start + 0]);
+ const g = parseState.parseInt(ary[start + 1]);
+ const b = parseState.parseInt(ary[start + 2]);
+ return {
+ color: `rgb(${r}, ${g}, ${b})`,
+ skipCount: usedSubargs ? 0 : 4,
+ };
+ }
+
+ case 3: { // CMY color.
+ // No need to support xterm/legacy forms as xterm doesn't support CMY.
+ if (!usedSubargs)
+ return {skipCount: 0};
+
+ // We need at least 4 args for CMY. If we don't have them, assume
+ // this sequence is corrupted. We ignore the color space identifier,
+ // tolerance, etc...
+ if (ary.length < 4)
+ return {skipCount: 0};
+
+ // TODO: See CMYK below.
+ const c = parseState.parseInt(ary[1]);
+ const m = parseState.parseInt(ary[2]);
+ const y = parseState.parseInt(ary[3]);
+ return {skipCount: 0};
+ }
+
+ case 4: { // CMYK color.
+ // No need to support xterm/legacy forms as xterm doesn't support CMYK.
+ if (!usedSubargs)
+ return {skipCount: 0};
+
+ // We need at least 5 args for CMYK. If we don't have them, assume
+ // this sequence is corrupted. We ignore the color space identifier,
+ // tolerance, etc...
+ if (ary.length < 5)
+ return {skipCount: 0};
+
+ // TODO: Implement this.
+ // Might wait until CSS4 is adopted for device-cmyk():
+ // https://www.w3.org/TR/css-color-4/#cmyk-colors
+ // Or normalize it to RGB ourselves:
+ // https://www.w3.org/TR/css-color-4/#cmyk-rgb
+ const c = parseState.parseInt(ary[1]);
+ const m = parseState.parseInt(ary[2]);
+ const y = parseState.parseInt(ary[3]);
+ const k = parseState.parseInt(ary[4]);
+ return {skipCount: 0};
+ }
+
+ case 5: { // Color palette index.
+ // If we're short on args, assume this sequence is corrupted, so don't
+ // eat anything more.
+ if (ary.length < 2)
+ return {skipCount: 0};
+
+ // Support 38:5:P (ISO 8613-6) and 38;5;P (xterm/legacy).
+ // We also ignore extra args with 38:5:P:[...], but more for laziness.
+ const ret = {
+ skipCount: usedSubargs ? 0 : 2,
+ };
+ const color = parseState.parseInt(ary[1]);
+ if (color < attrs.colorPalette.length)
+ ret.color = color;
+ return ret;
+ }
+ }
+};
+
+/**
+ * Character Attributes (SGR).
+ *
+ * Iterate through the list of arguments, applying the attribute changes based
+ * on the argument value...
+ */
+hterm.VT.CSI['m'] = function(parseState) {
+ var attrs = this.terminal.getTextAttributes();
+
+ if (!parseState.args.length) {
+ attrs.reset();
+ return;
+ }
+
+ for (var i = 0; i < parseState.args.length; i++) {
+ // If this argument has subargs (i.e. it has args followed by colons),
+ // the iarg logic will implicitly truncate that off for us.
+ var arg = parseState.iarg(i, 0);
+
+ if (arg < 30) {
+ if (arg == 0) { // Normal (default).
+ attrs.reset();
+ } else if (arg == 1) { // Bold.
+ attrs.bold = true;
+ } else if (arg == 2) { // Faint.
+ attrs.faint = true;
+ } else if (arg == 3) { // Italic.
+ attrs.italic = true;
+ } else if (arg == 4) { // Underline.
+ if (parseState.argHasSubargs(i)) {
+ const uarg = parseState.args[i].split(':')[1];
+ if (uarg == 0)
+ attrs.underline = false;
+ else if (uarg == 1)
+ attrs.underline = 'solid';
+ else if (uarg == 2)
+ attrs.underline = 'double';
+ else if (uarg == 3)
+ attrs.underline = 'wavy';
+ else if (uarg == 4)
+ attrs.underline = 'dotted';
+ else if (uarg == 5)
+ attrs.underline = 'dashed';
+ } else {
+ attrs.underline = 'solid';
+ }
+ } else if (arg == 5) { // Blink.
+ attrs.blink = true;
+ } else if (arg == 7) { // Inverse.
+ attrs.inverse = true;
+ } else if (arg == 8) { // Invisible.
+ attrs.invisible = true;
+ } else if (arg == 9) { // Crossed out.
+ attrs.strikethrough = true;
+ } else if (arg == 21) { // Double underlined.
+ attrs.underline = 'double';
+ } else if (arg == 22) { // Not bold & not faint.
+ attrs.bold = false;
+ attrs.faint = false;
+ } else if (arg == 23) { // Not italic.
+ attrs.italic = false;
+ } else if (arg == 24) { // Not underlined.
+ attrs.underline = false;
+ } else if (arg == 25) { // Not blink.
+ attrs.blink = false;
+ } else if (arg == 27) { // Steady.
+ attrs.inverse = false;
+ } else if (arg == 28) { // Visible.
+ attrs.invisible = false;
+ } else if (arg == 29) { // Not crossed out.
+ attrs.strikethrough = false;
+ }
+
+ } else if (arg < 50) {
+ // Select fore/background color from bottom half of 16 color palette
+ // or from the 256 color palette or alternative specify color in fully
+ // qualified rgb(r, g, b) form.
+ if (arg < 38) {
+ attrs.foregroundSource = arg - 30;
+
+ } else if (arg == 38) {
+ const result = this.parseSgrExtendedColors(parseState, i, attrs);
+ if (result.color !== undefined)
+ attrs.foregroundSource = result.color;
+ i += result.skipCount;
+
+ } else if (arg == 39) {
+ attrs.foregroundSource = attrs.SRC_DEFAULT;
+
+ } else if (arg < 48) {
+ attrs.backgroundSource = arg - 40;
+
+ } else if (arg == 48) {
+ const result = this.parseSgrExtendedColors(parseState, i, attrs);
+ if (result.color !== undefined)
+ attrs.backgroundSource = result.color;
+ i += result.skipCount;
+
+ } else {
+ attrs.backgroundSource = attrs.SRC_DEFAULT;
+ }
+
+ } else if (arg == 58) { // Underline coloring.
+ const result = this.parseSgrExtendedColors(parseState, i, attrs);
+ if (result.color !== undefined)
+ attrs.underlineSource = result.color;
+ i += result.skipCount;
+
+ } else if (arg == 59) { // Disable underline coloring.
+ attrs.underlineSource = attrs.SRC_DEFAULT;
+
+ } else if (arg >= 90 && arg <= 97) {
+ attrs.foregroundSource = arg - 90 + 8;
+
+ } else if (arg >= 100 && arg <= 107) {
+ attrs.backgroundSource = arg - 100 + 8;
+ }
+ }
+
+ attrs.setDefaults(this.terminal.getForegroundColor(),
+ this.terminal.getBackgroundColor());
+};
+
+// SGR calls can handle subargs.
+hterm.VT.CSI['m'].supportsSubargs = true;
+
+/**
+ * Set xterm-specific keyboard modes.
+ *
+ * Will not implement.
+ */
+hterm.VT.CSI['>m'] = hterm.VT.ignore;
+
+/**
+ * Device Status Report (DSR, DEC Specific).
+ *
+ * 5 - Status Report. Result (OK) is CSI 0 n
+ * 6 - Report Cursor Position (CPR) [row;column]. Result is CSI r ; c R
+ */
+hterm.VT.CSI['n'] = function(parseState) {
+ if (parseState.args[0] == 5) {
+ this.terminal.io.sendString('\x1b0n');
+ } else if (parseState.args[0] == 6) {
+ var row = this.terminal.getCursorRow() + 1;
+ var col = this.terminal.getCursorColumn() + 1;
+ this.terminal.io.sendString('\x1b[' + row + ';' + col + 'R');
+ }
+};
+
+/**
+ * Disable modifiers which may be enabled via CSI['>m'].
+ *
+ * Will not implement.
+ */
+hterm.VT.CSI['>n'] = hterm.VT.ignore;
+
+/**
+ * Device Status Report (DSR, DEC Specific).
+ *
+ * 6 - Report Cursor Position (CPR) [row;column] as CSI ? r ; c R
+ * 15 - Report Printer status as CSI ? 1 0 n (ready) or
+ * CSI ? 1 1 n (not ready).
+ * 25 - Report UDK status as CSI ? 2 0 n (unlocked) or CSI ? 2 1 n (locked).
+ * 26 - Report Keyboard status as CSI ? 2 7 ; 1 ; 0 ; 0 n (North American).
+ * The last two parameters apply to VT400 & up, and denote keyboard ready
+ * and LK01 respectively.
+ * 53 - Report Locator status as CSI ? 5 3 n Locator available, if compiled-in,
+ * or CSI ? 5 0 n No Locator, if not.
+ */
+hterm.VT.CSI['?n'] = function(parseState) {
+ if (parseState.args[0] == 6) {
+ var row = this.terminal.getCursorRow() + 1;
+ var col = this.terminal.getCursorColumn() + 1;
+ this.terminal.io.sendString('\x1b[' + row + ';' + col + 'R');
+ } else if (parseState.args[0] == 15) {
+ this.terminal.io.sendString('\x1b[?11n');
+ } else if (parseState.args[0] == 25) {
+ this.terminal.io.sendString('\x1b[?21n');
+ } else if (parseState.args[0] == 26) {
+ this.terminal.io.sendString('\x1b[?12;1;0;0n');
+ } else if (parseState.args[0] == 53) {
+ this.terminal.io.sendString('\x1b[?50n');
+ }
+};
+
+/**
+ * This is used by xterm to decide whether to hide the pointer cursor as the
+ * user types.
+ *
+ * Valid values for the parameter:
+ * 0 - Never hide the pointer.
+ * 1 - Hide if the mouse tracking mode is not enabled.
+ * 2 - Always hide the pointer.
+ *
+ * If no parameter is given, xterm uses the default, which is 1.
+ *
+ * Not currently implemented.
+ */
+hterm.VT.CSI['>p'] = hterm.VT.ignore;
+
+/**
+ * Soft terminal reset (DECSTR).
+ */
+hterm.VT.CSI['!p'] = function() {
+ this.terminal.softReset();
+};
+
+/**
+ * Request ANSI Mode (DECRQM).
+ *
+ * Not currently implemented.
+ */
+hterm.VT.CSI['$p'] = hterm.VT.ignore;
+hterm.VT.CSI['?$p'] = hterm.VT.ignore;
+
+/**
+ * Set conformance level (DECSCL).
+ *
+ * Not currently implemented.
+ */
+hterm.VT.CSI['"p'] = hterm.VT.ignore;
+
+/**
+ * Load LEDs (DECLL).
+ *
+ * Not currently implemented. Could be implemented as virtual LEDs overlaying
+ * the terminal if anyone cares.
+ */
+hterm.VT.CSI['q'] = hterm.VT.ignore;
+
+/**
+ * Set cursor style (DECSCUSR, VT520).
+ */
+hterm.VT.CSI[' q'] = function(parseState) {
+ var arg = parseState.args[0];
+
+ if (arg == 0 || arg == 1) {
+ this.terminal.setCursorShape(hterm.Terminal.cursorShape.BLOCK);
+ this.terminal.setCursorBlink(true);
+ } else if (arg == 2) {
+ this.terminal.setCursorShape(hterm.Terminal.cursorShape.BLOCK);
+ this.terminal.setCursorBlink(false);
+ } else if (arg == 3) {
+ this.terminal.setCursorShape(hterm.Terminal.cursorShape.UNDERLINE);
+ this.terminal.setCursorBlink(true);
+ } else if (arg == 4) {
+ this.terminal.setCursorShape(hterm.Terminal.cursorShape.UNDERLINE);
+ this.terminal.setCursorBlink(false);
+ } else if (arg == 5) {
+ this.terminal.setCursorShape(hterm.Terminal.cursorShape.BEAM);
+ this.terminal.setCursorBlink(true);
+ } else if (arg == 6) {
+ this.terminal.setCursorShape(hterm.Terminal.cursorShape.BEAM);
+ this.terminal.setCursorBlink(false);
+ } else {
+ console.warn('Unknown cursor style: ' + arg);
+ }
+};
+
+/**
+ * Select character protection attribute (DECSCA).
+ *
+ * Will not implement.
+ */
+hterm.VT.CSI['"q'] = hterm.VT.ignore;
+
+/**
+ * Set Scrolling Region (DECSTBM).
+ */
+hterm.VT.CSI['r'] = function(parseState) {
+ var args = parseState.args;
+ var scrollTop = args[0] ? parseInt(args[0], 10) -1 : null;
+ var scrollBottom = args[1] ? parseInt(args[1], 10) - 1 : null;
+ this.terminal.setVTScrollRegion(scrollTop, scrollBottom);
+ this.terminal.setCursorPosition(0, 0);
+};
+
+/**
+ * Restore DEC Private Mode Values.
+ *
+ * Will not implement.
+ */
+hterm.VT.CSI['?r'] = hterm.VT.ignore;
+
+/**
+ * Change Attributes in Rectangular Area (DECCARA)
+ *
+ * Will not implement.
+ */
+hterm.VT.CSI['$r'] = hterm.VT.ignore;
+
+/**
+ * Save cursor (ANSI.SYS)
+ */
+hterm.VT.CSI['s'] = function() {
+ this.terminal.saveCursorAndState();
+};
+
+/**
+ * Save DEC Private Mode Values.
+ *
+ * Will not implement.
+ */
+hterm.VT.CSI['?s'] = hterm.VT.ignore;
+
+/**
+ * Window manipulation (from dtterm, as well as extensions).
+ *
+ * Will not implement.
+ */
+hterm.VT.CSI['t'] = hterm.VT.ignore;
+
+/**
+ * Reverse Attributes in Rectangular Area (DECRARA).
+ *
+ * Will not implement.
+ */
+hterm.VT.CSI['$t'] = hterm.VT.ignore;
+
+/**
+ * Set one or more features of the title modes.
+ *
+ * Will not implement.
+ */
+hterm.VT.CSI['>t'] = hterm.VT.ignore;
+
+/**
+ * Set warning-bell volume (DECSWBV, VT520).
+ *
+ * Will not implement.
+ */
+hterm.VT.CSI[' t'] = hterm.VT.ignore;
+
+/**
+ * Restore cursor (ANSI.SYS).
+ */
+hterm.VT.CSI['u'] = function() {
+ this.terminal.restoreCursorAndState();
+};
+
+/**
+ * Set margin-bell volume (DECSMBV, VT520).
+ *
+ * Will not implement.
+ */
+hterm.VT.CSI[' u'] = hterm.VT.ignore;
+
+/**
+ * Copy Rectangular Area (DECCRA, VT400 and up).
+ *
+ * Will not implement.
+ */
+hterm.VT.CSI['$v'] = hterm.VT.ignore;
+
+/**
+ * Enable Filter Rectangle (DECEFR).
+ *
+ * Will not implement.
+ */
+hterm.VT.CSI['\'w'] = hterm.VT.ignore;
+
+/**
+ * Request Terminal Parameters (DECREQTPARM).
+ *
+ * Not currently implemented.
+ */
+hterm.VT.CSI['x'] = hterm.VT.ignore;
+
+/**
+ * Select Attribute Change Extent (DECSACE).
+ *
+ * Will not implement.
+ */
+hterm.VT.CSI['*x'] = hterm.VT.ignore;
+
+/**
+ * Fill Rectangular Area (DECFRA), VT420 and up.
+ *
+ * Will not implement.
+ */
+hterm.VT.CSI['$x'] = hterm.VT.ignore;
+
+/**
+ * vt_tiledata (as used by NAOhack and UnNetHack)
+ * (see https://nethackwiki.com/wiki/Vt_tiledata for more info)
+ *
+ * Implemented as far as we care (start a glyph and end a glyph).
+ */
+hterm.VT.CSI['z'] = function(parseState) {
+ if (parseState.args.length < 1)
+ return;
+ var arg = parseState.args[0];
+ if (arg == 0) {
+ // Start a glyph (one parameter, the glyph number).
+ if (parseState.args.length < 2)
+ return;
+ this.terminal.getTextAttributes().tileData = parseState.args[1];
+ } else if (arg == 1) {
+ // End a glyph.
+ this.terminal.getTextAttributes().tileData = null;
+ }
+};
+
+/**
+ * Enable Locator Reporting (DECELR).
+ *
+ * Not currently implemented.
+ */
+hterm.VT.CSI['\'z'] = hterm.VT.ignore;
+
+/**
+ * Erase Rectangular Area (DECERA), VT400 and up.
+ *
+ * Will not implement.
+ */
+hterm.VT.CSI['$z'] = hterm.VT.ignore;
+
+/**
+ * Select Locator Events (DECSLE).
+ *
+ * Not currently implemented.
+ */
+hterm.VT.CSI['\'{'] = hterm.VT.ignore;
+
+/**
+ * Request Locator Position (DECRQLP).
+ *
+ * Not currently implemented.
+ */
+hterm.VT.CSI['\'|'] = hterm.VT.ignore;
+
+/**
+ * Insert Columns (DECIC), VT420 and up.
+ *
+ * Will not implement.
+ */
+hterm.VT.CSI['\'}'] = hterm.VT.ignore;
+
+/**
+ * Delete P s Columns (DECDC), VT420 and up.
+ *
+ * Will not implement.
+ */
+hterm.VT.CSI['\'~'] = hterm.VT.ignore;
+// SOURCE FILE: hterm/js/hterm_vt_character_map.js
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+lib.rtdep('lib.f');
+
+/**
+ * Character map object.
+ *
+ * Mapping from received to display character, used depending on the active
+ * VT character set.
+ *
+ * GR maps are not currently supported.
+ *
+ * @param {string} description A human readable description of this map.
+ * @param {Object} glmap The GL mapping from input to output characters.
+ */
+hterm.VT.CharacterMap = function(description, glmap) {
+ /**
+ * Short description for this character set, useful for debugging.
+ */
+ this.description = description;
+
+ /**
+ * The function to call to when this map is installed in GL.
+ */
+ this.GL = null;
+
+ // Always keep an unmodified reference to the map.
+ // This allows us to sanely reset back to the original state.
+ this.glmapBase_ = glmap;
+
+ // Now sync the internal state as needed.
+ this.sync_();
+};
+
+/**
+ * Internal helper for resyncing internal state.
+ *
+ * Used when the mappings change.
+ *
+ * @param {Object?} opt_glmap Additional mappings to overlay on top of the
+ * base mapping.
+ */
+hterm.VT.CharacterMap.prototype.sync_ = function(opt_glmap) {
+ // If there are no maps, then reset the state back.
+ if (!this.glmapBase_ && !opt_glmap) {
+ this.GL = null;
+ delete this.glmap_;
+ delete this.glre_;
+ return;
+ }
+
+ // Set the the GL mapping. If we're given a custom mapping, then create a
+ // new object to hold the merged map. This way we can cleanly reset back.
+ if (opt_glmap)
+ this.glmap_ = Object.assign({}, this.glmapBase_, opt_glmap);
+ else
+ this.glmap_ = this.glmapBase_;
+
+ var glchars = Object.keys(this.glmap_).map((key) =>
+ '\\x' + lib.f.zpad(key.charCodeAt(0).toString(16)));
+ this.glre_ = new RegExp('[' + glchars.join('') + ']', 'g');
+
+ this.GL = (str) => str.replace(this.glre_, (ch) => this.glmap_[ch]);
+};
+
+/**
+ * Reset map back to original mappings (discarding runtime updates).
+ *
+ * Specifically, any calls to setOverrides will be discarded.
+ */
+hterm.VT.CharacterMap.prototype.reset = function() {
+ // If we haven't been given a custom mapping, then there's nothing to reset.
+ if (this.glmap_ !== this.glmapBase_)
+ this.sync_();
+};
+
+/**
+ * Merge custom changes to this map.
+ *
+ * The input map need not duplicate the existing mappings as it is merged with
+ * the existing base map (what was created with). Subsequent calls to this
+ * will throw away previous override settings.
+ *
+ * @param {Object} glmap The custom map to override existing mappings.
+ */
+hterm.VT.CharacterMap.prototype.setOverrides = function(glmap) {
+ this.sync_(glmap);
+};
+
+/**
+ * Return a copy of this mapping.
+ *
+ * @return {hterm.VT.CharacterMap} A new hterm.VT.CharacterMap instance.
+ */
+hterm.VT.CharacterMap.prototype.clone = function() {
+ var map = new hterm.VT.CharacterMap(this.description, this.glmapBase_);
+ if (this.glmap_ !== this.glmapBase_)
+ map.setOverrides(this.glmap_);
+ return map;
+};
+
+/**
+ * Table of character maps.
+ */
+hterm.VT.CharacterMaps = function() {
+ this.maps_ = hterm.VT.CharacterMaps.DefaultMaps;
+
+ // Always keep an unmodified reference to the map.
+ // This allows us to sanely reset back to the original state.
+ this.mapsBase_ = this.maps_;
+};
+
+/**
+ * Look up a previously registered map.
+ *
+ * @param {String} name The name of the map to lookup.
+ * @return {hterm.VT.CharacterMap} The map, if it's been registered.
+ */
+hterm.VT.CharacterMaps.prototype.getMap = function(name) {
+ if (this.maps_.hasOwnProperty(name))
+ return this.maps_[name];
+ else
+ return undefined;
+};
+
+/**
+ * Register a new map.
+ *
+ * Any previously registered maps by this name will be discarded.
+ *
+ * @param {String} name The name of the map.
+ * @param {hterm.VT.CharacterMap} map The map to register.
+ */
+hterm.VT.CharacterMaps.prototype.addMap = function(name, map) {
+ if (this.maps_ === this.mapsBase_)
+ this.maps_ = Object.assign({}, this.mapsBase_);
+ this.maps_[name] = map;
+};
+
+/**
+ * Reset the table and all its maps back to original state.
+ */
+hterm.VT.CharacterMaps.prototype.reset = function() {
+ if (this.maps_ !== hterm.VT.CharacterMaps.DefaultMaps)
+ this.maps_ = hterm.VT.CharacterMaps.DefaultMaps;
+};
+
+/**
+ * Merge custom changes to this table.
+ *
+ * @param {Object} maps A set of hterm.VT.CharacterMap objects.
+ */
+hterm.VT.CharacterMaps.prototype.setOverrides = function(maps) {
+ if (this.maps_ === this.mapsBase_)
+ this.maps_ = Object.assign({}, this.mapsBase_);
+
+ for (var name in maps) {
+ var map = this.getMap(name);
+ if (map !== undefined) {
+ this.maps_[name] = map.clone();
+ this.maps_[name].setOverrides(maps[name]);
+ } else
+ this.addMap(name, new hterm.VT.CharacterMap('user ' + name, maps[name]));
+ }
+};
+
+/**
+ * The default set of supported character maps.
+ */
+hterm.VT.CharacterMaps.DefaultMaps = {};
+
+/**
+ * VT100 Graphic character map.
+ * http://vt100.net/docs/vt220-rm/table2-4.html
+ */
+hterm.VT.CharacterMaps.DefaultMaps['0'] = new hterm.VT.CharacterMap(
+ 'graphic', {
+ '\x60':'\u25c6', // ` -> diamond
+ '\x61':'\u2592', // a -> grey-box
+ '\x62':'\u2409', // b -> h/t
+ '\x63':'\u240c', // c -> f/f
+ '\x64':'\u240d', // d -> c/r
+ '\x65':'\u240a', // e -> l/f
+ '\x66':'\u00b0', // f -> degree
+ '\x67':'\u00b1', // g -> +/-
+ '\x68':'\u2424', // h -> n/l
+ '\x69':'\u240b', // i -> v/t
+ '\x6a':'\u2518', // j -> bottom-right
+ '\x6b':'\u2510', // k -> top-right
+ '\x6c':'\u250c', // l -> top-left
+ '\x6d':'\u2514', // m -> bottom-left
+ '\x6e':'\u253c', // n -> line-cross
+ '\x6f':'\u23ba', // o -> scan1
+ '\x70':'\u23bb', // p -> scan3
+ '\x71':'\u2500', // q -> scan5
+ '\x72':'\u23bc', // r -> scan7
+ '\x73':'\u23bd', // s -> scan9
+ '\x74':'\u251c', // t -> left-tee
+ '\x75':'\u2524', // u -> right-tee
+ '\x76':'\u2534', // v -> bottom-tee
+ '\x77':'\u252c', // w -> top-tee
+ '\x78':'\u2502', // x -> vertical-line
+ '\x79':'\u2264', // y -> less-equal
+ '\x7a':'\u2265', // z -> greater-equal
+ '\x7b':'\u03c0', // { -> pi
+ '\x7c':'\u2260', // | -> not-equal
+ '\x7d':'\u00a3', // } -> british-pound
+ '\x7e':'\u00b7', // ~ -> dot
+ });
+
+/**
+ * British character map.
+ * http://vt100.net/docs/vt220-rm/table2-5.html
+ */
+hterm.VT.CharacterMaps.DefaultMaps['A'] = new hterm.VT.CharacterMap(
+ 'british', {
+ '\x23': '\u00a3', // # -> british-pound
+ });
+
+/**
+ * US ASCII map, no changes.
+ */
+hterm.VT.CharacterMaps.DefaultMaps['B'] = new hterm.VT.CharacterMap(
+ 'us', null);
+
+/**
+ * Dutch character map.
+ * http://vt100.net/docs/vt220-rm/table2-6.html
+ */
+hterm.VT.CharacterMaps.DefaultMaps['4'] = new hterm.VT.CharacterMap(
+ 'dutch', {
+ '\x23': '\u00a3', // # -> british-pound
+
+ '\x40': '\u00be', // @ -> 3/4
+
+ '\x5b': '\u0132', // [ -> 'ij' ligature (xterm goes with \u00ff?)
+ '\x5c': '\u00bd', // \ -> 1/2
+ '\x5d': '\u007c', // ] -> vertical bar
+
+ '\x7b': '\u00a8', // { -> two dots
+ '\x7c': '\u0066', // | -> f
+ '\x7d': '\u00bc', // } -> 1/4
+ '\x7e': '\u00b4', // ~ -> acute
+ });
+
+/**
+ * Finnish character map.
+ * http://vt100.net/docs/vt220-rm/table2-7.html
+ */
+hterm.VT.CharacterMaps.DefaultMaps['C'] =
+hterm.VT.CharacterMaps.DefaultMaps['5'] = new hterm.VT.CharacterMap(
+ 'finnish', {
+ '\x5b': '\u00c4', // [ -> 'A' umlaut
+ '\x5c': '\u00d6', // \ -> 'O' umlaut
+ '\x5d': '\u00c5', // ] -> 'A' ring
+ '\x5e': '\u00dc', // ~ -> 'u' umlaut
+
+ '\x60': '\u00e9', // ` -> 'e' acute
+
+ '\x7b': '\u00e4', // { -> 'a' umlaut
+ '\x7c': '\u00f6', // | -> 'o' umlaut
+ '\x7d': '\u00e5', // } -> 'a' ring
+ '\x7e': '\u00fc', // ~ -> 'u' umlaut
+ });
+
+/**
+ * French character map.
+ * http://vt100.net/docs/vt220-rm/table2-8.html
+ */
+hterm.VT.CharacterMaps.DefaultMaps['R'] = new hterm.VT.CharacterMap(
+ 'french', {
+ '\x23': '\u00a3', // # -> british-pound
+
+ '\x40': '\u00e0', // @ -> 'a' grave
+
+ '\x5b': '\u00b0', // [ -> ring
+ '\x5c': '\u00e7', // \ -> 'c' cedilla
+ '\x5d': '\u00a7', // ] -> section symbol (double s)
+
+ '\x7b': '\u00e9', // { -> 'e' acute
+ '\x7c': '\u00f9', // | -> 'u' grave
+ '\x7d': '\u00e8', // } -> 'e' grave
+ '\x7e': '\u00a8', // ~ -> umlaut
+ });
+
+/**
+ * French Canadian character map.
+ * http://vt100.net/docs/vt220-rm/table2-9.html
+ */
+hterm.VT.CharacterMaps.DefaultMaps['Q'] = new hterm.VT.CharacterMap(
+ 'french canadian', {
+ '\x40': '\u00e0', // @ -> 'a' grave
+
+ '\x5b': '\u00e2', // [ -> 'a' circumflex
+ '\x5c': '\u00e7', // \ -> 'c' cedilla
+ '\x5d': '\u00ea', // ] -> 'e' circumflex
+ '\x5e': '\u00ee', // ^ -> 'i' circumflex
+
+ '\x60': '\u00f4', // ` -> 'o' circumflex
+
+ '\x7b': '\u00e9', // { -> 'e' acute
+ '\x7c': '\u00f9', // | -> 'u' grave
+ '\x7d': '\u00e8', // } -> 'e' grave
+ '\x7e': '\u00fb', // ~ -> 'u' circumflex
+ });
+
+/**
+ * German character map.
+ * http://vt100.net/docs/vt220-rm/table2-10.html
+ */
+hterm.VT.CharacterMaps.DefaultMaps['K'] = new hterm.VT.CharacterMap(
+ 'german', {
+ '\x40': '\u00a7', // @ -> section symbol (double s)
+
+ '\x5b': '\u00c4', // [ -> 'A' umlaut
+ '\x5c': '\u00d6', // \ -> 'O' umlaut
+ '\x5d': '\u00dc', // ] -> 'U' umlaut
+
+ '\x7b': '\u00e4', // { -> 'a' umlaut
+ '\x7c': '\u00f6', // | -> 'o' umlaut
+ '\x7d': '\u00fc', // } -> 'u' umlaut
+ '\x7e': '\u00df', // ~ -> eszett
+ });
+
+/**
+ * Italian character map.
+ * http://vt100.net/docs/vt220-rm/table2-11.html
+ */
+hterm.VT.CharacterMaps.DefaultMaps['Y'] = new hterm.VT.CharacterMap(
+ 'italian', {
+ '\x23': '\u00a3', // # -> british-pound
+
+ '\x40': '\u00a7', // @ -> section symbol (double s)
+
+ '\x5b': '\u00b0', // [ -> ring
+ '\x5c': '\u00e7', // \ -> 'c' cedilla
+ '\x5d': '\u00e9', // ] -> 'e' acute
+
+ '\x60': '\u00f9', // ` -> 'u' grave
+
+ '\x7b': '\u00e0', // { -> 'a' grave
+ '\x7c': '\u00f2', // | -> 'o' grave
+ '\x7d': '\u00e8', // } -> 'e' grave
+ '\x7e': '\u00ec', // ~ -> 'i' grave
+ });
+
+/**
+ * Norwegian/Danish character map.
+ * http://vt100.net/docs/vt220-rm/table2-12.html
+ */
+hterm.VT.CharacterMaps.DefaultMaps['E'] =
+hterm.VT.CharacterMaps.DefaultMaps['6'] = new hterm.VT.CharacterMap(
+ 'norwegian/danish', {
+ '\x40': '\u00c4', // @ -> 'A' umlaut
+
+ '\x5b': '\u00c6', // [ -> 'AE' ligature
+ '\x5c': '\u00d8', // \ -> 'O' stroke
+ '\x5d': '\u00c5', // ] -> 'A' ring
+ '\x5e': '\u00dc', // ^ -> 'U' umlaut
+
+ '\x60': '\u00e4', // ` -> 'a' umlaut
+
+ '\x7b': '\u00e6', // { -> 'ae' ligature
+ '\x7c': '\u00f8', // | -> 'o' stroke
+ '\x7d': '\u00e5', // } -> 'a' ring
+ '\x7e': '\u00fc', // ~ -> 'u' umlaut
+ });
+
+/**
+ * Spanish character map.
+ * http://vt100.net/docs/vt220-rm/table2-13.html
+ */
+hterm.VT.CharacterMaps.DefaultMaps['Z'] = new hterm.VT.CharacterMap(
+ 'spanish', {
+ '\x23': '\u00a3', // # -> british-pound
+
+ '\x40': '\u00a7', // @ -> section symbol (double s)
+
+ '\x5b': '\u00a1', // [ -> '!' inverted
+ '\x5c': '\u00d1', // \ -> 'N' tilde
+ '\x5d': '\u00bf', // ] -> '?' inverted
+
+ '\x7b': '\u00b0', // { -> ring
+ '\x7c': '\u00f1', // | -> 'n' tilde
+ '\x7d': '\u00e7', // } -> 'c' cedilla
+ });
+
+/**
+ * Swedish character map.
+ * http://vt100.net/docs/vt220-rm/table2-14.html
+ */
+hterm.VT.CharacterMaps.DefaultMaps['7'] =
+hterm.VT.CharacterMaps.DefaultMaps['H'] = new hterm.VT.CharacterMap(
+ 'swedish', {
+ '\x40': '\u00c9', // @ -> 'E' acute
+
+ '\x5b': '\u00c4', // [ -> 'A' umlaut
+ '\x5c': '\u00d6', // \ -> 'O' umlaut
+ '\x5d': '\u00c5', // ] -> 'A' ring
+ '\x5e': '\u00dc', // ^ -> 'U' umlaut
+
+ '\x60': '\u00e9', // ` -> 'e' acute
+
+ '\x7b': '\u00e4', // { -> 'a' umlaut
+ '\x7c': '\u00f6', // | -> 'o' umlaut
+ '\x7d': '\u00e5', // } -> 'a' ring
+ '\x7e': '\u00fc', // ~ -> 'u' umlaut
+ });
+
+/**
+ * Swiss character map.
+ * http://vt100.net/docs/vt220-rm/table2-15.html
+ */
+hterm.VT.CharacterMaps.DefaultMaps['='] = new hterm.VT.CharacterMap(
+ 'swiss', {
+ '\x23': '\u00f9', // # -> 'u' grave
+
+ '\x40': '\u00e0', // @ -> 'a' grave
+
+ '\x5b': '\u00e9', // [ -> 'e' acute
+ '\x5c': '\u00e7', // \ -> 'c' cedilla
+ '\x5d': '\u00ea', // ] -> 'e' circumflex
+ '\x5e': '\u00ee', // ^ -> 'i' circumflex
+ '\x5f': '\u00e8', // _ -> 'e' grave
+
+ '\x60': '\u00f4', // ` -> 'o' circumflex
+
+ '\x7b': '\u00e4', // { -> 'a' umlaut
+ '\x7c': '\u00f6', // | -> 'o' umlaut
+ '\x7d': '\u00fc', // } -> 'u' umlaut
+ '\x7e': '\u00fb', // ~ -> 'u' circumflex
+ });
+lib.resource.add('hterm/audio/bell', 'audio/ogg;base64',
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+'mjdDIUmcDgfv6OhwH4CIjie0gJfVAF3J2bVjWzgB65TnL0ygs7NrnROwthZUqzWcPHUOV1y2txiu' +
+'JA/Pzc0/spYJEob5ye/Zs/NiZka5XEVPr4821gfP9xAN3nA9yB4c6Nt+cG5eLvPGDCdNUKNS7769' +
+'u3ZGX1NfqwfR+s//C/PDnH5TRq+kxun8fBkdxQJGhgd2Hjx01BBAwgQl7L/I5fyd4RJE3+TUdNjI' +
+'PKSc0AJg/T+JxNNnK5Uly3VuterJOpzh3hmts5DWKExy3/j6l2J4eAAjI4PbjG9UF6YQrMaBWRCu' +
+'fu4fHRn0Bvp7USzkUS4vmD9as+IP3cSHWL5eXGTUizk6v/IDubodM7+++qs+ENbsg2RxLlE/5pr1' +
+'Ew8H25aFnp6u2CFvGx0e0JHQGdMEJTWgkTo7d4xe3NfXg1KpiLe86TWg9ONtc3eKuVX3yatei5m1' +
+'AIa6pRT9QaCeb2YporBzx7Zd0chnRkgKbaSLsMLZcK6/rzecU53n5TSAEkw/HPkFy86BpJtq3LRB' +
+'IK6jq7NDhPOqPi0A0+cuuxq6EMas5bGJaVQWFWgTbrqVTdEX9f4ZvmfB9/3Il5bW2hNmnZbDB4om' +
+'Lpw/h7n5RYCa+3E0ToY4Jp9XiGSYk/WMvHmlxDEn7yN5ffN4mTzrM808G+0leJqVbG81njbfjFJH' +
+'Hr4no4lZ3fjRT06GoWxQ+eFHn7rTz/1Tv5QSrBQpZrAmfVMaQJyNOXHOPESjztJfs54uxFJWl5q1' +
+'zYuZRzD+RzAPEufoJFln2TyMv8axwUheJPGRVSMFEHe4ZckqMy8cOXLin5f7xVUyyPypwhKAHp13' +
+'IjJCVW4iHGAz30Q5mmx3I+dwyvbWE36x0ck1AFW9Gb+g06qmWkMQVuLEQEtuVldyjR/vFJqyjxNb' +
+'6+mTA6DV96HMvkx0ej2pAZZxoBL5QJ8oDKIW3jxnfA5twj1xUhPMjjd9wGpOOEgIgUzaxFG8RZ4F' +
+'Tgxos9N1atajtd+S1LytA26p8NKbQE7/0+BtpNakNtpoo4022vgf7lRPtKCE39oAAAAASUVORK5C' +
+'YII='
+);
+
+lib.resource.add('hterm/concat/date', 'text/plain',
+'Mon, 21 Jan 2019 20:18:45 +0000'
+);
+
+lib.resource.add('hterm/changelog/version', 'text/plain',
+'1.84'
+);
+
+lib.resource.add('hterm/changelog/date', 'text/plain',
+'2019-01-19'
+);
+
+lib.resource.add('hterm/git/HEAD', 'text/plain',
+'231ff3d044f0fb40bb205265c772f4caff141aae'
+);
+
diff --git a/htdocs/index.js b/htdocs/index.js
index 749edc5..ea40e4d 100644
--- a/htdocs/index.js
+++ b/htdocs/index.js
@@ -9,12 +9,13 @@
*/
// The latest hterm release that we default to.
-const latestRelease = '1.83';
+const latestRelease = '1.84';
// All hterm releases that may be dynamically selected.
const allReleases = [
'1.80',
'1.81',
'1.82',
+ '1.83',
latestRelease,
];
// The current version loaded.
