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.

'use strict';

lib.rtdep('lib.f');

/**
 * Character map object.
 *
 * @param {object} The GL mapping from input characters to output characters.
 *     The GR mapping will be automatically created.
 */
hterm.VT.CharacterMap = function(name, glmap) {
  /**
   * Short name for this character set, useful for debugging.
   */
  this.name = name;

  /**
   * The function to call to when this map is installed in GL.
   */
  this.GL = null;

  /**
   * The function to call to when this map is installed in GR.
   */
  this.GR = null;

  if (glmap)
    this.reset(glmap);
};

/**
 * @param {object} The GL mapping from input characters to output characters.
 *     The GR mapping will be automatically created.
 */
hterm.VT.CharacterMap.prototype.reset = function(glmap) {
  // Set the the GL mapping.
  this.glmap = glmap;

  var glkeys = Object.keys(this.glmap).map(function(key) {
      return '\\x' + lib.f.zpad(key.charCodeAt(0).toString(16));
    });

  this.glre = new RegExp('[' + glkeys.join('') + ']', 'g');

  // Compute the GR mapping.
  // This is the same as GL except all keys have their MSB set.
  this.grmap = {};

  glkeys.forEach(function(glkey) {
      var grkey = String.fromCharCode(glkey.charCodeAt(0) & 0x80);
      this.grmap[grkey] = this.glmap[glkey];
    }.bind(this));

  var grkeys = Object.keys(this.grmap).map(function(key) {
      return '\\x' + lib.f.zpad(key.charCodeAt(0).toString(16), 2);
    });

  this.grre = new RegExp('[' + grkeys.join('') + ']', 'g');

  this.GL = function(str) {
    return str.replace(this.glre,
                       function(ch) { return this.glmap[ch] }.bind(this));
  }.bind(this);

  this.GR = function(str) {
    return str.replace(this.grre,
                       function(ch) { return this.grmap[ch] }.bind(this));
  }.bind(this);
};

/**
 * Mapping from received to display character, used depending on the active
 * VT character set.
 */
hterm.VT.CharacterMap.maps = {};

/**
 * VT100 Graphic character map.
 * http://vt100.net/docs/vt220-rm/table2-4.html
 */
hterm.VT.CharacterMap.maps['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.CharacterMap.maps['A'] = new hterm.VT.CharacterMap(
    'british', {
      '\x23': '\u00a3',  // # -> british-pound
    });

/**
 * US ASCII map, no changes.
 */
hterm.VT.CharacterMap.maps['B'] = new hterm.VT.CharacterMap(
    'us', null);

/**
 * Dutch character map.
 * http://vt100.net/docs/vt220-rm/table2-6.html
 */
hterm.VT.CharacterMap.maps['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.CharacterMap.maps['C'] =
hterm.VT.CharacterMap.maps['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.CharacterMap.maps['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.CharacterMap.maps['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.CharacterMap.maps['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.CharacterMap.maps['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.CharacterMap.maps['E'] =
hterm.VT.CharacterMap.maps['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.CharacterMap.maps['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.CharacterMap.maps['7'] =
hterm.VT.CharacterMap.maps['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.CharacterMap.maps['='] = 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
    });