node_modules/vscode-html-languageservice/lib/umd/services/htmlFormatter.js

/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/
(function (factory) {
    if (typeof module === "object" && typeof module.exports === "object") {
        var v = factory(require, exports);
        if (v !== undefined) module.exports = v;
    }
    else if (typeof define === "function" && define.amd) {
        define(["require", "exports", "vscode-languageserver-types", "../beautify/beautify-html", "../utils/strings"], factory);
    }
})(function (require, exports) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    var vscode_languageserver_types_1 = require("vscode-languageserver-types");
    var beautify_html_1 = require("../beautify/beautify-html");
    var strings_1 = require("../utils/strings");
    function format(document, range, options) {
        var value = document.getText();
        var includesEnd = true;
        var initialIndentLevel = 0;
        var tabSize = options.tabSize || 4;
        if (range) {
            var startOffset = document.offsetAt(range.start);
            // include all leading whitespace iff at the beginning of the line
            var extendedStart = startOffset;
            while (extendedStart > 0 && isWhitespace(value, extendedStart - 1)) {
                extendedStart--;
            }
            if (extendedStart === 0 || isEOL(value, extendedStart - 1)) {
                startOffset = extendedStart;
            }
            else {
                // else keep at least one whitespace
                if (extendedStart < startOffset) {
                    startOffset = extendedStart + 1;
                }
            }
            // include all following whitespace until the end of the line
            var endOffset = document.offsetAt(range.end);
            var extendedEnd = endOffset;
            while (extendedEnd < value.length && isWhitespace(value, extendedEnd)) {
                extendedEnd++;
            }
            if (extendedEnd === value.length || isEOL(value, extendedEnd)) {
                endOffset = extendedEnd;
            }
            range = vscode_languageserver_types_1.Range.create(document.positionAt(startOffset), document.positionAt(endOffset));
            // Do not modify if substring starts in inside an element
            // Ending inside an element is fine as it doesn't cause formatting errors
            var firstHalf = value.substring(0, startOffset);
            if (new RegExp(/.*[<][^>]*$/).test(firstHalf)) {
                //return without modification
                value = value.substring(startOffset, endOffset);
                return [{
                        range: range,
                        newText: value
                    }];
            }
            includesEnd = endOffset === value.length;
            value = value.substring(startOffset, endOffset);
            if (startOffset !== 0) {
                var startOfLineOffset = document.offsetAt(vscode_languageserver_types_1.Position.create(range.start.line, 0));
                initialIndentLevel = computeIndentLevel(document.getText(), startOfLineOffset, options);
            }
        }
        else {
            range = vscode_languageserver_types_1.Range.create(vscode_languageserver_types_1.Position.create(0, 0), document.positionAt(value.length));
        }
        var htmlOptions = {
            indent_size: tabSize,
            indent_char: options.insertSpaces ? ' ' : '\t',
            indent_empty_lines: getFormatOption(options, 'indentEmptyLines', false),
            wrap_line_length: getFormatOption(options, 'wrapLineLength', 120),
            unformatted: getTagsFormatOption(options, 'unformatted', void 0),
            content_unformatted: getTagsFormatOption(options, 'contentUnformatted', void 0),
            indent_inner_html: getFormatOption(options, 'indentInnerHtml', false),
            preserve_newlines: getFormatOption(options, 'preserveNewLines', true),
            max_preserve_newlines: getFormatOption(options, 'maxPreserveNewLines', 32786),
            indent_handlebars: getFormatOption(options, 'indentHandlebars', false),
            end_with_newline: includesEnd && getFormatOption(options, 'endWithNewline', false),
            extra_liners: getTagsFormatOption(options, 'extraLiners', void 0),
            wrap_attributes: getFormatOption(options, 'wrapAttributes', 'auto'),
            wrap_attributes_indent_size: getFormatOption(options, 'wrapAttributesIndentSize', void 0),
            eol: '\n'
        };
        var result = beautify_html_1.html_beautify(trimLeft(value), htmlOptions);
        if (initialIndentLevel > 0) {
            var indent = options.insertSpaces ? strings_1.repeat(' ', tabSize * initialIndentLevel) : strings_1.repeat('\t', initialIndentLevel);
            result = result.split('\n').join('\n' + indent);
            if (range.start.character === 0) {
                result = indent + result; // keep the indent
            }
        }
        return [{
                range: range,
                newText: result
            }];
    }
    exports.format = format;
    function trimLeft(str) {
        return str.replace(/^\s+/, '');
    }
    function getFormatOption(options, key, dflt) {
        if (options && options.hasOwnProperty(key)) {
            var value = options[key];
            if (value !== null) {
                return value;
            }
        }
        return dflt;
    }
    function getTagsFormatOption(options, key, dflt) {
        var list = getFormatOption(options, key, null);
        if (typeof list === 'string') {
            if (list.length > 0) {
                return list.split(',').map(function (t) { return t.trim().toLowerCase(); });
            }
            return [];
        }
        return dflt;
    }
    function computeIndentLevel(content, offset, options) {
        var i = offset;
        var nChars = 0;
        var tabSize = options.tabSize || 4;
        while (i < content.length) {
            var ch = content.charAt(i);
            if (ch === ' ') {
                nChars++;
            }
            else if (ch === '\t') {
                nChars += tabSize;
            }
            else {
                break;
            }
            i++;
        }
        return Math.floor(nChars / tabSize);
    }
    function getEOL(document) {
        var text = document.getText();
        if (document.lineCount > 1) {
            var to = document.offsetAt(vscode_languageserver_types_1.Position.create(1, 0));
            var from = to;
            while (from > 0 && isEOL(text, from - 1)) {
                from--;
            }
            return text.substr(from, to - from);
        }
        return '\n';
    }
    function isEOL(text, offset) {
        return '\r\n'.indexOf(text.charAt(offset)) !== -1;
    }
    function isWhitespace(text, offset) {
        return ' \t'.indexOf(text.charAt(offset)) !== -1;
    }
});