src/xterm.js

   1 /**
   2  * xterm.js: xterm, in the browser
   3  * Originally forked from (with the author's permission):
   4  *   Fabrice Bellard's javascript vt100 for jslinux:
   5  *   http://bellard.org/jslinux/
   6  *   Copyright (c) 2011 Fabrice Bellard
   7  *   The original design remains. The terminal itself
   8  *   has been extended to include xterm CSI codes, among
   9  *   other features.
  10  * @license MIT
  11  */
  12
  13 import { CompositionHelper } from './CompositionHelper.js';
  14 import { EventEmitter } from './EventEmitter.js';
  15 import { Viewport } from './Viewport.js';
  16 import { rightClickHandler, pasteHandler, copyHandler } from './handlers/Clipboard.js';
  17 import { CircularList } from './utils/CircularList.js';
  18 import * as Browser from './utils/Browser';
  19 import * as Keyboard from './utils/Keyboard';
  20
  21 /**
  22  * Terminal Emulation References:
  23  *   http://vt100.net/
  24  *   http://invisible-island.net/xterm/ctlseqs/ctlseqs.txt
  25  *   http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
  26  *   http://invisible-island.net/vttest/
  27  *   http://www.inwap.com/pdp10/ansicode.txt
  28  *   http://linux.die.net/man/4/console_codes
  29  *   http://linux.die.net/man/7/urxvt
  30  */
  31
  32 // Let it work inside Node.js for automated testing purposes.
  33 var document = (typeof window != 'undefined') ? window.document : null;
  34
  35 /**
  36  * States
  37  */
  38 var normal = 0, escaped = 1, csi = 2, osc = 3, charset = 4, dcs = 5, ignore = 6;
  39
  40 /**
  41  * Terminal
  42  */
  43
  44 /**
  45  * Creates a new `Terminal` object.
  46  *
  47  * @param {object} options An object containing a set of options, the available options are:
  48  *   - `cursorBlink` (boolean): Whether the terminal cursor blinks
  49  *   - `cols` (number): The number of columns of the terminal (horizontal size)
  50  *   - `rows` (number): The number of rows of the terminal (vertical size)
  51  *
  52  * @public
  53  * @class Xterm Xterm
  54  * @alias module:xterm/src/xterm
  55  */
  56 function Terminal(options) {
  57   var self = this;
  58
  59   if (!(this instanceof Terminal)) {
  60     return new Terminal(arguments[0], arguments[1], arguments[2]);
  61   }
  62
  63   self.browser = Browser;
  64   self.cancel = Terminal.cancel;
  65
  66   EventEmitter.call(this);
  67
  68   if (typeof options === 'number') {
  69     options = {
  70       cols: arguments[0],
  71       rows: arguments[1],
  72       handler: arguments[2]
  73     };
  74   }
  75
  76   options = options || {};
  77
  78
  79   Object.keys(Terminal.defaults).forEach(function(key) {
  80     if (options[key] == null) {
  81       options[key] = Terminal.options[key];
  82
  83       if (Terminal[key] !== Terminal.defaults[key]) {
  84         options[key] = Terminal[key];
  85       }
  86     }
  87     self[key] = options[key];
  88   });
  89
  90   if (options.colors.length === 8) {
  91     options.colors = options.colors.concat(Terminal._colors.slice(8));
  92   } else if (options.colors.length === 16) {
  93     options.colors = options.colors.concat(Terminal._colors.slice(16));
  94   } else if (options.colors.length === 10) {
  95     options.colors = options.colors.slice(0, -2).concat(
  96       Terminal._colors.slice(8, -2), options.colors.slice(-2));
  97   } else if (options.colors.length === 18) {
  98     options.colors = options.colors.concat(
  99       Terminal._colors.slice(16, -2), options.colors.slice(-2));
 100   }
 101   this.colors = options.colors;
 102
 103   this.options = options;
 104
 105   // this.context = options.context || window;
 106   // this.document = options.document || document;
 107   this.parent = options.body || options.parent || (
 108     document ? document.getElementsByTagName('body')[0] : null
 109   );
 110
 111   this.cols = options.cols || options.geometry[0];
 112   this.rows = options.rows || options.geometry[1];
 113   this.geometry = [this.cols, this.rows];
 114
 115   if (options.handler) {
 116     this.on('data', options.handler);
 117   }
 118
 119   /**
 120    * The scroll position of the y cursor, ie. ybase + y = the y position within the entire
 121    * buffer
 122    */
 123   this.ybase = 0;
 124
 125   /**
 126    * The scroll position of the viewport
 127    */
 128   this.ydisp = 0;
 129
 130   /**
 131    * The cursor's x position after ybase
 132    */
 133   this.x = 0;
 134
 135   /**
 136    * The cursor's y position after ybase
 137    */
 138   this.y = 0;
 139
 140   /**
 141    * Used to debounce the refresh function
 142    */
 143   this.isRefreshing = false;
 144
 145   /**
 146    * Whether there is a full terminal refresh queued
 147    */
 148
 149   this.cursorState = 0;
 150   this.cursorHidden = false;
 151   this.convertEol;
 152   this.state = 0;
 153   this.queue = '';
 154   this.scrollTop = 0;
 155   this.scrollBottom = this.rows - 1;
 156   this.customKeydownHandler = null;
 157
 158   // modes
 159   this.applicationKeypad = false;
 160   this.applicationCursor = false;
 161   this.originMode = false;
 162   this.insertMode = false;
 163   this.wraparoundMode = true; // defaults: xterm - true, vt100 - false
 164   this.normal = null;
 165
 166   // charset
 167   this.charset = null;
 168   this.gcharset = null;
 169   this.glevel = 0;
 170   this.charsets = [null];
 171
 172   // mouse properties
 173   this.decLocator;
 174   this.x10Mouse;
 175   this.vt200Mouse;
 176   this.vt300Mouse;
 177   this.normalMouse;
 178   this.mouseEvents;
 179   this.sendFocus;
 180   this.utfMouse;
 181   this.sgrMouse;
 182   this.urxvtMouse;
 183
 184   // misc
 185   this.element;
 186   this.children;
 187   this.refreshStart;
 188   this.refreshEnd;
 189   this.savedX;
 190   this.savedY;
 191   this.savedCols;
 192
 193   // stream
 194   this.readable = true;
 195   this.writable = true;
 196
 197   this.defAttr = (0 << 18) | (257 << 9) | (256 << 0);
 198   this.curAttr = this.defAttr;
 199
 200   this.params = [];
 201   this.currentParam = 0;
 202   this.prefix = '';
 203   this.postfix = '';
 204
 205   // leftover surrogate high from previous write invocation
 206   this.surrogate_high = '';
 207
 208   /**
 209    * An array of all lines in the entire buffer, including the prompt. The lines are array of
 210    * characters which are 2-length arrays where [0] is an attribute and [1] is the character.
 211    */
 212   this.lines = new CircularList(this.scrollback);
 213   var i = this.rows;
 214   while (i--) {
 215     this.lines.push(this.blankLine());
 216   }
 217
 218   this.tabs;
 219   this.setupStops();
 220
 221   // Store if user went browsing history in scrollback
 222   this.userScrolling = false;
 223 }
 224
 225 inherits(Terminal, EventEmitter);
 226
 227 /**
 228  * back_color_erase feature for xterm.
 229  */
 230 Terminal.prototype.eraseAttr = function() {
 231   // if (this.is('screen')) return this.defAttr;
 232   return (this.defAttr & ~0x1ff) | (this.curAttr & 0x1ff);
 233 };
 234
 235 /**
 236  * Colors
 237  */
 238
 239 // Colors 0-15
 240 Terminal.tangoColors = [
 241   // dark:
 242   '#2e3436',
 243   '#cc0000',
 244   '#4e9a06',
 245   '#c4a000',
 246   '#3465a4',
 247   '#75507b',
 248   '#06989a',
 249   '#d3d7cf',
 250   // bright:
 251   '#555753',
 252   '#ef2929',
 253   '#8ae234',
 254   '#fce94f',
 255   '#729fcf',
 256   '#ad7fa8',
 257   '#34e2e2',
 258   '#eeeeec'
 259 ];
 260
 261 // Colors 0-15 + 16-255
 262 // Much thanks to TooTallNate for writing this.
 263 Terminal.colors = (function() {
 264   var colors = Terminal.tangoColors.slice()
 265   , r = [0x00, 0x5f, 0x87, 0xaf, 0xd7, 0xff]
 266   , i;
 267
 268   // 16-231
 269   i = 0;
 270   for (; i < 216; i++) {
 271     out(r[(i / 36) % 6 | 0], r[(i / 6) % 6 | 0], r[i % 6]);
 272   }
 273
 274   // 232-255 (grey)
 275   i = 0;
 276   for (; i < 24; i++) {
 277     r = 8 + i * 10;
 278     out(r, r, r);
 279   }
 280
 281   function out(r, g, b) {
 282     colors.push('#' + hex(r) + hex(g) + hex(b));
 283   }
 284
 285   function hex(c) {
 286     c = c.toString(16);
 287     return c.length < 2 ? '0' + c : c;
 288   }
 289
 290   return colors;
 291 })();
 292
 293 Terminal._colors = Terminal.colors.slice();
 294
 295 Terminal.vcolors = (function() {
 296   var out = []
 297   , colors = Terminal.colors
 298   , i = 0
 299   , color;
 300
 301   for (; i < 256; i++) {
 302     color = parseInt(colors[i].substring(1), 16);
 303     out.push([
 304       (color >> 16) & 0xff,
 305       (color >> 8) & 0xff,
 306       color & 0xff
 307     ]);
 308   }
 309
 310   return out;
 311 })();
 312
 313 /**
 314  * Options
 315  */
 316
 317 Terminal.defaults = {
 318   colors: Terminal.colors,
 319   theme: 'default',
 320   convertEol: false,
 321   termName: 'xterm',
 322   geometry: [80, 24],
 323   cursorBlink: false,
 324   visualBell: false,
 325   popOnBell: false,
 326   scrollback: 1000,
 327   screenKeys: false,
 328   debug: false,
 329   cancelEvents: false
 330   // programFeatures: false,
 331   // focusKeys: false,
 332 };
 333
 334 Terminal.options = {};
 335
 336 Terminal.focus = null;
 337
 338 each(keys(Terminal.defaults), function(key) {
 339   Terminal[key] = Terminal.defaults[key];
 340   Terminal.options[key] = Terminal.defaults[key];
 341 });
 342
 343 /**
 344  * Focus the terminal. Delegates focus handling to the terminal's DOM element.
 345  */
 346 Terminal.prototype.focus = function() {
 347   return this.textarea.focus();
 348 };
 349
 350 /**
 351  * Retrieves an option's value from the terminal.
 352  * @param {string} key The option key.
 353  */
 354 Terminal.prototype.getOption = function(key, value) {
 355   if (!(key in Terminal.defaults)) {
 356     throw new Error('No option with key "' + key + '"');
 357   }
 358
 359   if (typeof this.options[key] !== 'undefined') {
 360     return this.options[key];
 361   }
 362
 363   return this[key];
 364 };
 365
 366 /**
 367  * Sets an option on the terminal.
 368  * @param {string} key The option key.
 369  * @param {string} value The option value.
 370  */
 371 Terminal.prototype.setOption = function(key, value) {
 372   if (!(key in Terminal.defaults)) {
 373     throw new Error('No option with key "' + key + '"');
 374   }
 375   this[key] = value;
 376   this.options[key] = value;
 377 };
 378
 379 /**
 380  * Binds the desired focus behavior on a given terminal object.
 381  *
 382  * @static
 383  */
 384 Terminal.bindFocus = function (term) {
 385   on(term.textarea, 'focus', function (ev) {
 386     if (term.sendFocus) {
 387       term.send('\x1b[I');
 388     }
 389     term.element.classList.add('focus');
 390     term.showCursor();
 391     Terminal.focus = term;
 392     term.emit('focus', {terminal: term});
 393   });
 394 };
 395
 396 /**
 397  * Blur the terminal. Delegates blur handling to the terminal's DOM element.
 398  */
 399 Terminal.prototype.blur = function() {
 400   return this.textarea.blur();
 401 };
 402
 403 /**
 404  * Binds the desired blur behavior on a given terminal object.
 405  *
 406  * @static
 407  */
 408 Terminal.bindBlur = function (term) {
 409   on(term.textarea, 'blur', function (ev) {
 410     term.refresh(term.y, term.y);
 411     if (term.sendFocus) {
 412       term.send('\x1b[O');
 413     }
 414     term.element.classList.remove('focus');
 415     Terminal.focus = null;
 416     term.emit('blur', {terminal: term});
 417   });
 418 };
 419
 420 /**
 421  * Initialize default behavior
 422  */
 423 Terminal.prototype.initGlobal = function() {
 424   var term = this;
 425
 426   Terminal.bindKeys(this);
 427   Terminal.bindFocus(this);
 428   Terminal.bindBlur(this);
 429
 430   // Bind clipboard functionality
 431   on(this.element, 'copy', function (ev) {
 432     copyHandler.call(this, ev, term);
 433   });
 434   on(this.textarea, 'paste', function (ev) {
 435     pasteHandler.call(this, ev, term);
 436   });
 437
 438   function rightClickHandlerWrapper (ev) {
 439     rightClickHandler.call(this, ev, term);
 440   }
 441
 442   if (term.browser.isFirefox) {
 443     on(this.element, 'mousedown', function (ev) {
 444       if (ev.button == 2) {
 445         rightClickHandlerWrapper(ev);
 446       }
 447     });
 448   } else {
 449     on(this.element, 'contextmenu', rightClickHandlerWrapper);
 450   }
 451 };
 452
 453 /**
 454  * Apply key handling to the terminal
 455  */
 456 Terminal.bindKeys = function(term) {
 457   on(term.element, 'keydown', function(ev) {
 458     if (document.activeElement != this) {
 459       return;
 460     }
 461     term.keyDown(ev);
 462   }, true);
 463
 464   on(term.element, 'keypress', function(ev) {
 465     if (document.activeElement != this) {
 466       return;
 467     }
 468     term.keyPress(ev);
 469   }, true);
 470
 471   on(term.element, 'keyup', term.focus.bind(term));
 472
 473   on(term.textarea, 'keydown', function(ev) {
 474     term.keyDown(ev);
 475   }, true);
 476
 477   on(term.textarea, 'keypress', function(ev) {
 478     term.keyPress(ev);
 479     // Truncate the textarea's value, since it is not needed
 480     this.value = '';
 481   }, true);
 482
 483   on(term.textarea, 'compositionstart', term.compositionHelper.compositionstart.bind(term.compositionHelper));
 484   on(term.textarea, 'compositionupdate', term.compositionHelper.compositionupdate.bind(term.compositionHelper));
 485   on(term.textarea, 'compositionend', term.compositionHelper.compositionend.bind(term.compositionHelper));
 486   term.on('refresh', term.compositionHelper.updateCompositionElements.bind(term.compositionHelper));
 487 };
 488
 489
 490 /**
 491  * Insert the given row to the terminal or produce a new one
 492  * if no row argument is passed. Return the inserted row.
 493  * @param {HTMLElement} row (optional) The row to append to the terminal.
 494  */
 495 Terminal.prototype.insertRow = function (row) {
 496   if (typeof row != 'object') {
 497     row = document.createElement('div');
 498   }
 499
 500   this.rowContainer.appendChild(row);
 501   this.children.push(row);
 502
 503   return row;
 504 };
 505
 506 /**
 507  * Opens the terminal within an element.
 508  *
 509  * @param {HTMLElement} parent The element to create the terminal within.
 510  */
 511 Terminal.prototype.open = function(parent) {
 512   var self=this, i=0, div;
 513
 514   this.parent = parent || this.parent;
 515
 516   if (!this.parent) {
 517     throw new Error('Terminal requires a parent element.');
 518   }
 519
 520   // Grab global elements
 521   this.context = this.parent.ownerDocument.defaultView;
 522   this.document = this.parent.ownerDocument;
 523   this.body = this.document.getElementsByTagName('body')[0];
 524
 525   //Create main element container
 526   this.element = this.document.createElement('div');
 527   this.element.classList.add('terminal');
 528   this.element.classList.add('xterm');
 529   this.element.classList.add('xterm-theme-' + this.theme);
 530
 531   this.element.style.height
 532   this.element.setAttribute('tabindex', 0);
 533
 534   this.viewportElement = document.createElement('div');
 535   this.viewportElement.classList.add('xterm-viewport');
 536   this.element.appendChild(this.viewportElement);
 537   this.viewportScrollArea = document.createElement('div');
 538   this.viewportScrollArea.classList.add('xterm-scroll-area');
 539   this.viewportElement.appendChild(this.viewportScrollArea);
 540
 541   // Create the container that will hold the lines of the terminal and then
 542   // produce the lines the lines.
 543   this.rowContainer = document.createElement('div');
 544   this.rowContainer.classList.add('xterm-rows');
 545   this.element.appendChild(this.rowContainer);
 546   this.children = [];
 547
 548   // Create the container that will hold helpers like the textarea for
 549   // capturing DOM Events. Then produce the helpers.
 550   this.helperContainer = document.createElement('div');
 551   this.helperContainer.classList.add('xterm-helpers');
 552   // TODO: This should probably be inserted once it's filled to prevent an additional layout
 553   this.element.appendChild(this.helperContainer);
 554   this.textarea = document.createElement('textarea');
 555   this.textarea.classList.add('xterm-helper-textarea');
 556   this.textarea.setAttribute('autocorrect', 'off');
 557   this.textarea.setAttribute('autocapitalize', 'off');
 558   this.textarea.setAttribute('spellcheck', 'false');
 559   this.textarea.tabIndex = 0;
 560   this.textarea.addEventListener('focus', function() {
 561     self.emit('focus', {terminal: self});
 562   });
 563   this.textarea.addEventListener('blur', function() {
 564     self.emit('blur', {terminal: self});
 565   });
 566   this.helperContainer.appendChild(this.textarea);
 567
 568   this.compositionView = document.createElement('div');
 569   this.compositionView.classList.add('composition-view');
 570   this.compositionHelper = new CompositionHelper(this.textarea, this.compositionView, this);
 571   this.helperContainer.appendChild(this.compositionView);
 572
 573   this.charMeasureElement = document.createElement('div');
 574   this.charMeasureElement.classList.add('xterm-char-measure-element');
 575   this.charMeasureElement.innerHTML = 'W';
 576   this.helperContainer.appendChild(this.charMeasureElement);
 577
 578   for (; i < this.rows; i++) {
 579     this.insertRow();
 580   }
 581   this.parent.appendChild(this.element);
 582
 583   this.viewport = new Viewport(this, this.viewportElement, this.viewportScrollArea, this.charMeasureElement);
 584
 585   // Draw the screen.
 586   this.refresh(0, this.rows - 1);
 587
 588   // Initialize global actions that
 589   // need to be taken on the document.
 590   this.initGlobal();
 591
 592   // Ensure there is a Terminal.focus.
 593   this.focus();
 594
 595   on(this.element, 'click', function() {
 596     var selection = document.getSelection(),
 597         collapsed = selection.isCollapsed,
 598         isRange = typeof collapsed == 'boolean' ? !collapsed : selection.type == 'Range';
 599     if (!isRange) {
 600       self.focus();
 601     }
 602   });
 603
 604   // Listen for mouse events and translate
 605   // them into terminal mouse protocols.
 606   this.bindMouse();
 607
 608   // Figure out whether boldness affects
 609   // the character width of monospace fonts.
 610   if (Terminal.brokenBold == null) {
 611     Terminal.brokenBold = isBoldBroken(this.document);
 612   }
 613
 614   /**
 615    * This event is emitted when terminal has completed opening.
 616    *
 617    * @event open
 618    */
 619   this.emit('open');
 620 };
 621
 622
 623 /**
 624  * Attempts to load an add-on using CommonJS or RequireJS (whichever is available).
 625  * @param {string} addon The name of the addon to load
 626  * @static
 627  */
 628 Terminal.loadAddon = function(addon, callback) {
 629   if (typeof exports === 'object' && typeof module === 'object') {
 630     // CommonJS
 631     return require('./addons/' + addon + '/' + addon);
 632   } else if (typeof define == 'function') {
 633     // RequireJS
 634     return require(['./addons/' + addon + '/' + addon], callback);
 635   } else {
 636     console.error('Cannot load a module without a CommonJS or RequireJS environment.');
 637     return false;
 638   }
 639 };
 640
 641
 642 /**
 643  * XTerm mouse events
 644  * http://invisible-island.net/xterm/ctlseqs/ctlseqs.html#Mouse%20Tracking
 645  * To better understand these
 646  * the xterm code is very helpful:
 647  * Relevant files:
 648  *   button.c, charproc.c, misc.c
 649  * Relevant functions in xterm/button.c:
 650  *   BtnCode, EmitButtonCode, EditorButton, SendMousePosition
 651  */
 652 Terminal.prototype.bindMouse = function() {
 653   var el = this.element, self = this, pressed = 32;
 654
 655   // mouseup, mousedown, wheel
 656   // left click: ^[[M 3<^[[M#3<
 657   // wheel up: ^[[M`3>
 658   function sendButton(ev) {
 659     var button
 660     , pos;
 661
 662     // get the xterm-style button
 663     button = getButton(ev);
 664
 665     // get mouse coordinates
 666     pos = getCoords(ev);
 667     if (!pos) return;
 668
 669     sendEvent(button, pos);
 670
 671     switch (ev.overrideType || ev.type) {
 672       case 'mousedown':
 673         pressed = button;
 674         break;
 675       case 'mouseup':
 676         // keep it at the left
 677         // button, just in case.
 678         pressed = 32;
 679         break;
 680       case 'wheel':
 681         // nothing. don't
 682         // interfere with
 683         // `pressed`.
 684         break;
 685     }
 686   }
 687
 688   // motion example of a left click:
 689   // ^[[M 3<^[[M@4<^[[M@5<^[[M@6<^[[M@7<^[[M#7<
 690   function sendMove(ev) {
 691     var button = pressed
 692     , pos;
 693
 694     pos = getCoords(ev);
 695     if (!pos) return;
 696
 697     // buttons marked as motions
 698     // are incremented by 32
 699     button += 32;
 700
 701     sendEvent(button, pos);
 702   }
 703
 704   // encode button and
 705   // position to characters
 706   function encode(data, ch) {
 707     if (!self.utfMouse) {
 708       if (ch === 255) return data.push(0);
 709       if (ch > 127) ch = 127;
 710       data.push(ch);
 711     } else {
 712       if (ch === 2047) return data.push(0);
 713       if (ch < 127) {
 714         data.push(ch);
 715       } else {
 716         if (ch > 2047) ch = 2047;
 717         data.push(0xC0 | (ch >> 6));
 718         data.push(0x80 | (ch & 0x3F));
 719       }
 720     }
 721   }
 722
 723   // send a mouse event:
 724   // regular/utf8: ^[[M Cb Cx Cy
 725   // urxvt: ^[[ Cb ; Cx ; Cy M
 726   // sgr: ^[[ Cb ; Cx ; Cy M/m
 727   // vt300: ^[[ 24(1/3/5)~ [ Cx , Cy ] \r
 728   // locator: CSI P e ; P b ; P r ; P c ; P p & w
 729   function sendEvent(button, pos) {
 730     // self.emit('mouse', {
 731     //   x: pos.x - 32,
 732     //   y: pos.x - 32,
 733     //   button: button
 734     // });
 735
 736     if (self.vt300Mouse) {
 737       // NOTE: Unstable.
 738       // http://www.vt100.net/docs/vt3xx-gp/chapter15.html
 739       button &= 3;
 740       pos.x -= 32;
 741       pos.y -= 32;
 742       var data = '\x1b[24';
 743       if (button === 0) data += '1';
 744       else if (button === 1) data += '3';
 745       else if (button === 2) data += '5';
 746       else if (button === 3) return;
 747       else data += '0';
 748       data += '~[' + pos.x + ',' + pos.y + ']\r';
 749       self.send(data);
 750       return;
 751     }
 752
 753     if (self.decLocator) {
 754       // NOTE: Unstable.
 755       button &= 3;
 756       pos.x -= 32;
 757       pos.y -= 32;
 758       if (button === 0) button = 2;
 759       else if (button === 1) button = 4;
 760       else if (button === 2) button = 6;
 761       else if (button === 3) button = 3;
 762       self.send('\x1b['
 763                 + button
 764                 + ';'
 765                 + (button === 3 ? 4 : 0)
 766                 + ';'
 767                 + pos.y
 768                 + ';'
 769                 + pos.x
 770                 + ';'
 771                 + (pos.page || 0)
 772                 + '&w');
 773       return;
 774     }
 775
 776     if (self.urxvtMouse) {
 777       pos.x -= 32;
 778       pos.y -= 32;
 779       pos.x++;
 780       pos.y++;
 781       self.send('\x1b[' + button + ';' + pos.x + ';' + pos.y + 'M');
 782       return;
 783     }
 784
 785     if (self.sgrMouse) {
 786       pos.x -= 32;
 787       pos.y -= 32;
 788       self.send('\x1b[<'
 789                 + (((button & 3) === 3 ? button & ~3 : button) - 32)
 790                 + ';'
 791                 + pos.x
 792                 + ';'
 793                 + pos.y
 794                 + ((button & 3) === 3 ? 'm' : 'M'));
 795       return;
 796     }
 797
 798     var data = [];
 799
 800     encode(data, button);
 801     encode(data, pos.x);
 802     encode(data, pos.y);
 803
 804     self.send('\x1b[M' + String.fromCharCode.apply(String, data));
 805   }
 806
 807   function getButton(ev) {
 808     var button
 809     , shift
 810     , meta
 811     , ctrl
 812     , mod;
 813
 814     // two low bits:
 815     // 0 = left
 816     // 1 = middle
 817     // 2 = right
 818     // 3 = release
 819     // wheel up/down:
 820     // 1, and 2 - with 64 added
 821     switch (ev.overrideType || ev.type) {
 822       case 'mousedown':
 823         button = ev.button != null
 824           ? +ev.button
 825         : ev.which != null
 826           ? ev.which - 1
 827         : null;
 828
 829         if (self.browser.isMSIE) {
 830           button = button === 1 ? 0 : button === 4 ? 1 : button;
 831         }
 832         break;
 833       case 'mouseup':
 834         button = 3;
 835         break;
 836       case 'DOMMouseScroll':
 837         button = ev.detail < 0
 838           ? 64
 839         : 65;
 840         break;
 841       case 'wheel':
 842         button = ev.wheelDeltaY > 0
 843           ? 64
 844         : 65;
 845         break;
 846     }
 847
 848     // next three bits are the modifiers:
 849     // 4 = shift, 8 = meta, 16 = control
 850     shift = ev.shiftKey ? 4 : 0;
 851     meta = ev.metaKey ? 8 : 0;
 852     ctrl = ev.ctrlKey ? 16 : 0;
 853     mod = shift | meta | ctrl;
 854
 855     // no mods
 856     if (self.vt200Mouse) {
 857       // ctrl only
 858       mod &= ctrl;
 859     } else if (!self.normalMouse) {
 860       mod = 0;
 861     }
 862
 863     // increment to SP
 864     button = (32 + (mod << 2)) + button;
 865
 866     return button;
 867   }
 868
 869   // mouse coordinates measured in cols/rows
 870   function getCoords(ev) {
 871     var x, y, w, h, el;
 872
 873     // ignore browsers without pageX for now
 874     if (ev.pageX == null) return;
 875
 876     x = ev.pageX;
 877     y = ev.pageY;
 878     el = self.element;
 879
 880     // should probably check offsetParent
 881     // but this is more portable
 882     while (el && el !== self.document.documentElement) {
 883       x -= el.offsetLeft;
 884       y -= el.offsetTop;
 885       el = 'offsetParent' in el
 886         ? el.offsetParent
 887       : el.parentNode;
 888     }
 889
 890     // convert to cols/rows
 891     w = self.element.clientWidth;
 892     h = self.element.clientHeight;
 893     x = Math.ceil((x / w) * self.cols);
 894     y = Math.ceil((y / h) * self.rows);
 895
 896     // be sure to avoid sending
 897     // bad positions to the program
 898     if (x < 0) x = 0;
 899     if (x > self.cols) x = self.cols;
 900     if (y < 0) y = 0;
 901     if (y > self.rows) y = self.rows;
 902
 903     // xterm sends raw bytes and
 904     // starts at 32 (SP) for each.
 905     x += 32;
 906     y += 32;
 907
 908     return {
 909       x: x,
 910       y: y,
 911       type: 'wheel'
 912     };
 913   }
 914
 915   on(el, 'mousedown', function(ev) {
 916     if (!self.mouseEvents) return;
 917
 918     // send the button
 919     sendButton(ev);
 920
 921     // ensure focus
 922     self.focus();
 923
 924     // fix for odd bug
 925     //if (self.vt200Mouse && !self.normalMouse) {
 926     if (self.vt200Mouse) {
 927       ev.overrideType = 'mouseup';
 928       sendButton(ev);
 929       return self.cancel(ev);
 930     }
 931
 932     // bind events
 933     if (self.normalMouse) on(self.document, 'mousemove', sendMove);
 934
 935     // x10 compatibility mode can't send button releases
 936     if (!self.x10Mouse) {
 937       on(self.document, 'mouseup', function up(ev) {
 938         sendButton(ev);
 939         if (self.normalMouse) off(self.document, 'mousemove', sendMove);
 940         off(self.document, 'mouseup', up);
 941         return self.cancel(ev);
 942       });
 943     }
 944
 945     return self.cancel(ev);
 946   });
 947
 948   //if (self.normalMouse) {
 949   //  on(self.document, 'mousemove', sendMove);
 950   //}
 951
 952   on(el, 'wheel', function(ev) {
 953     if (!self.mouseEvents) return;
 954     if (self.x10Mouse
 955         || self.vt300Mouse
 956         || self.decLocator) return;
 957     sendButton(ev);
 958     return self.cancel(ev);
 959   });
 960
 961   // allow wheel scrolling in
 962   // the shell for example
 963   on(el, 'wheel', function(ev) {
 964     if (self.mouseEvents) return;
 965     self.viewport.onWheel(ev);
 966     return self.cancel(ev);
 967   });
 968 };
 969
 970 /**
 971  * Destroys the terminal.
 972  */
 973 Terminal.prototype.destroy = function() {
 974   this.readable = false;
 975   this.writable = false;
 976   this._events = {};
 977   this.handler = function() {};
 978   this.write = function() {};
 979   if (this.element.parentNode) {
 980     this.element.parentNode.removeChild(this.element);
 981   }
 982   //this.emit('close');
 983 };
 984
 985
 986 /**
 987  * Flags used to render terminal text properly
 988  */
 989 Terminal.flags = {
 990   BOLD: 1,
 991   UNDERLINE: 2,
 992   BLINK: 4,
 993   INVERSE: 8,
 994   INVISIBLE: 16
 995 }
 996
 997 /**
 998  * Refreshes (re-renders) terminal content within two rows (inclusive)
 999  *
1000  * Rendering Engine:
1001  *
1002  * In the screen buffer, each character is stored as a an array with a character
1003  * and a 32-bit integer:
1004  *   - First value: a utf-16 character.
1005  *   - Second value:
1006  *   - Next 9 bits: background color (0-511).
1007  *   - Next 9 bits: foreground color (0-511).
1008  *   - Next 14 bits: a mask for misc. flags:
1009  *     - 1=bold
1010  *     - 2=underline
1011  *     - 4=blink
1012  *     - 8=inverse
1013  *     - 16=invisible
1014  *
1015  * @param {number} start The row to start from (between 0 and terminal's height terminal - 1)
1016  * @param {number} end The row to end at (between fromRow and terminal's height terminal - 1)
1017  * @param {boolean} queue Whether the refresh should ran right now or be queued
1018  */
1019 Terminal.prototype.refresh = function(start, end, queue) {
1020   var self = this;
1021
1022   // queue defaults to true
1023   queue = (typeof queue == 'undefined') ? true : queue;
1024
1025   /**
1026    * The refresh queue allows refresh to execute only approximately 30 times a second. For
1027    * commands that pass a significant amount of output to the write function, this prevents the
1028    * terminal from maxing out the CPU and making the UI unresponsive. While commands can still
1029    * run beyond what they do on the terminal, it is far better with a debounce in place as
1030    * every single terminal manipulation does not need to be constructed in the DOM.
1031    *
1032    * A side-effect of this is that it makes ^C to interrupt a process seem more responsive.
1033    */
1034   if (queue) {
1035     // If refresh should be queued, order the refresh and return.
1036     if (this._refreshIsQueued) {
1037       // If a refresh has already been queued, just order a full refresh next
1038       this._fullRefreshNext = true;
1039     } else {
1040       setTimeout(function () {
1041         self.refresh(start, end, false);
1042       }, 34)
1043       this._refreshIsQueued = true;
1044     }
1045     return;
1046   }
1047
1048   // If refresh should be run right now (not be queued), release the lock
1049   this._refreshIsQueued = false;
1050
1051   // If multiple refreshes were requested, make a full refresh.
1052   if (this._fullRefreshNext) {
1053     start = 0;
1054     end = this.rows - 1;
1055     this._fullRefreshNext = false // reset lock
1056   }
1057
1058   var x, y, i, line, out, ch, ch_width, width, data, attr, bg, fg, flags, row, parent, focused = document.activeElement;
1059
1060   // If this is a big refresh, remove the terminal rows from the DOM for faster calculations
1061   if (end - start >= this.rows / 2) {
1062     parent = this.element.parentNode;
1063     if (parent) {
1064       this.element.removeChild(this.rowContainer);
1065     }
1066   }
1067
1068   width = this.cols;
1069   y = start;
1070
1071   if (end >= this.rows.length) {
1072     this.log('`end` is too large. Most likely a bad CSR.');
1073     end = this.rows.length - 1;
1074   }
1075
1076   for (; y <= end; y++) {
1077     row = y + this.ydisp;
1078
1079     line = this.lines.get(row);
1080     out = '';
1081
1082     if (this.y === y - (this.ybase - this.ydisp)
1083         && this.cursorState
1084         && !this.cursorHidden) {
1085       x = this.x;
1086     } else {
1087       x = -1;
1088     }
1089
1090     attr = this.defAttr;
1091     i = 0;
1092
1093     for (; i < width; i++) {
1094       data = line[i][0];
1095       ch = line[i][1];
1096       ch_width = line[i][2];
1097       if (!ch_width)
1098         continue;
1099
1100       if (i === x) data = -1;
1101
1102       if (data !== attr) {
1103         if (attr !== this.defAttr) {
1104           out += '</span>';
1105         }
1106         if (data !== this.defAttr) {
1107           if (data === -1) {
1108             out += '<span class="reverse-video terminal-cursor';
1109             if (this.cursorBlink) {
1110               out += ' blinking';
1111             }
1112             out += '">';
1113           } else {
1114             var classNames = [];
1115
1116             bg = data & 0x1ff;
1117             fg = (data >> 9) & 0x1ff;
1118             flags = data >> 18;
1119
1120             if (flags & Terminal.flags.BOLD) {
1121               if (!Terminal.brokenBold) {
1122                 classNames.push('xterm-bold');
1123               }
1124               // See: XTerm*boldColors
1125               if (fg < 8) fg += 8;
1126             }
1127
1128             if (flags & Terminal.flags.UNDERLINE) {
1129               classNames.push('xterm-underline');
1130             }
1131
1132             if (flags & Terminal.flags.BLINK) {
1133               classNames.push('xterm-blink');
1134             }
1135
1136             // If inverse flag is on, then swap the foreground and background variables.
1137             if (flags & Terminal.flags.INVERSE) {
1138               /* One-line variable swap in JavaScript: http://stackoverflow.com/a/16201730 */
1139               bg = [fg, fg = bg][0];
1140               // Should inverse just be before the
1141               // above boldColors effect instead?
1142               if ((flags & 1) && fg < 8) fg += 8;
1143             }
1144
1145             if (flags & Terminal.flags.INVISIBLE) {
1146               classNames.push('xterm-hidden');
1147             }
1148
1149             /**
1150              * Weird situation: Invert flag used black foreground and white background results
1151              * in invalid background color, positioned at the 256 index of the 256 terminal
1152              * color map. Pin the colors manually in such a case.
1153              *
1154              * Source: https://github.com/sourcelair/xterm.js/issues/57
1155              */
1156             if (flags & Terminal.flags.INVERSE) {
1157               if (bg == 257) {
1158                 bg = 15;
1159               }
1160               if (fg == 256) {
1161                 fg = 0;
1162               }
1163             }
1164
1165             if (bg < 256) {
1166               classNames.push('xterm-bg-color-' + bg);
1167             }
1168
1169             if (fg < 256) {
1170               classNames.push('xterm-color-' + fg);
1171             }
1172
1173             out += '<span';
1174             if (classNames.length) {
1175               out += ' class="' + classNames.join(' ') + '"';
1176             }
1177             out += '>';
1178           }
1179         }
1180       }
1181
1182       switch (ch) {
1183         case '&':
1184           out += '&amp;';
1185           break;
1186         case '<':
1187           out += '&lt;';
1188           break;
1189         case '>':
1190           out += '&gt;';
1191           break;
1192         default:
1193           if (ch <= ' ') {
1194             out += '&nbsp;';
1195           } else {
1196             out += ch;
1197           }
1198           break;
1199       }
1200
1201       attr = data;
1202     }
1203
1204     if (attr !== this.defAttr) {
1205       out += '</span>';
1206     }
1207
1208     this.children[y].innerHTML = out;
1209   }
1210
1211   if (parent) {
1212     this.element.appendChild(this.rowContainer);
1213   }
1214
1215   this.emit('refresh', {element: this.element, start: start, end: end});
1216 };
1217
1218 /**
1219  * Display the cursor element
1220  */
1221 Terminal.prototype.showCursor = function() {
1222   if (!this.cursorState) {
1223     this.cursorState = 1;
1224     this.refresh(this.y, this.y);
1225   }
1226 };
1227
1228 /**
1229  * Scroll the terminal
1230  */
1231 Terminal.prototype.scroll = function() {
1232   var row;
1233
1234   if (++this.ybase === this.scrollback) {
1235     this.ybase = this.ybase / 2;
1236     // TODO: Rely on the circular list instead of cutting it in half
1237     this.lines.removeItemsFromStart(this.ybase + this.rows - 1);
1238   }
1239
1240   if (!this.userScrolling) {
1241     this.ydisp = this.ybase;
1242   }
1243
1244   // last line
1245   row = this.ybase + this.rows - 1;
1246
1247   // subtract the bottom scroll region
1248   row -= this.rows - 1 - this.scrollBottom;
1249
1250   if (row === this.lines.length) {
1251     // potential optimization:
1252     // pushing is faster than splicing
1253     // when they amount to the same
1254     // behavior.
1255     this.lines.push(this.blankLine());
1256   } else {
1257     // add our new line
1258     this.lines.splice(row, 0, this.blankLine());
1259   }
1260
1261   if (this.scrollTop !== 0) {
1262     if (this.ybase !== 0) {
1263       this.ybase--;
1264       if (!this.userScrolling) {
1265         this.ydisp = this.ybase;
1266       }
1267     }
1268     this.lines.splice(this.ybase + this.scrollTop, 1);
1269   }
1270
1271   // this.maxRange();
1272   this.updateRange(this.scrollTop);
1273   this.updateRange(this.scrollBottom);
1274
1275   /**
1276    * This event is emitted whenever the terminal is scrolled.
1277    * The one parameter passed is the new y display position.
1278    *
1279    * @event scroll
1280    */
1281   this.emit('scroll', this.ydisp);
1282 };
1283
1284 /**
1285  * Scroll the display of the terminal
1286  * @param {number} disp The number of lines to scroll down (negatives scroll up).
1287  * @param {boolean} suppressScrollEvent Don't emit the scroll event as scrollDisp. This is used
1288  * to avoid unwanted events being handled by the veiwport when the event was triggered from the
1289  * viewport originally.
1290  */
1291 Terminal.prototype.scrollDisp = function(disp, suppressScrollEvent) {
1292   if (disp < 0) {
1293     this.userScrolling = true;
1294   } else if (disp + this.ydisp >= this.ybase) {
1295     this.userScrolling = false;
1296   }
1297
1298   this.ydisp += disp;
1299
1300   if (this.ydisp > this.ybase) {
1301     this.ydisp = this.ybase;
1302   } else if (this.ydisp < 0) {
1303     this.ydisp = 0;
1304   }
1305
1306   if (!suppressScrollEvent) {
1307     this.emit('scroll', this.ydisp);
1308   }
1309
1310   this.refresh(0, this.rows - 1);
1311 };
1312
1313 /**
1314  * Scroll the display of the terminal by a number of pages.
1315  * @param {number} pageCount The number of pages to scroll (negative scrolls up).
1316  */
1317 Terminal.prototype.scrollPages = function(pageCount) {
1318   this.scrollDisp(pageCount * (this.rows - 1));
1319 }
1320
1321 /**
1322  * Scrolls the display of the terminal to the top.
1323  */
1324 Terminal.prototype.scrollToTop = function() {
1325   this.scrollDisp(-this.ydisp);
1326 }
1327
1328 /**
1329  * Scrolls the display of the terminal to the bottom.
1330  */
1331 Terminal.prototype.scrollToBottom = function() {
1332   this.scrollDisp(this.ybase - this.ydisp);
1333 }
1334
1335 /**
1336  * Writes text to the terminal.
1337  * @param {string} text The text to write to the terminal.
1338  */
1339 Terminal.prototype.write = function(data) {
1340   var l = data.length, i = 0, j, cs, ch, code, low, ch_width, row;
1341
1342   this.refreshStart = this.y;
1343   this.refreshEnd = this.y;
1344
1345   // apply leftover surrogate high from last write
1346   if (this.surrogate_high) {
1347     data = this.surrogate_high + data;
1348     this.surrogate_high = '';
1349   }
1350
1351   for (; i < l; i++) {
1352     ch = data[i];
1353
1354     // FIXME: higher chars than 0xa0 are not allowed in escape sequences
1355     //        --> maybe move to default
1356     code = data.charCodeAt(i);
1357     if (0xD800 <= code && code <= 0xDBFF) {
1358       // we got a surrogate high
1359       // get surrogate low (next 2 bytes)
1360       low = data.charCodeAt(i+1);
1361       if (isNaN(low)) {
1362         // end of data stream, save surrogate high
1363         this.surrogate_high = ch;
1364         continue;
1365       }
1366       code = ((code - 0xD800) * 0x400) + (low - 0xDC00) + 0x10000;
1367       ch += data.charAt(i+1);
1368     }
1369     // surrogate low - already handled above
1370     if (0xDC00 <= code && code <= 0xDFFF)
1371       continue;
1372     switch (this.state) {
1373       case normal:
1374         switch (ch) {
1375           case '\x07':
1376             this.bell();
1377             break;
1378
1379           // '\n', '\v', '\f'
1380           case '\n':
1381           case '\x0b':
1382           case '\x0c':
1383             if (this.convertEol) {
1384               this.x = 0;
1385             }
1386             this.y++;
1387             if (this.y > this.scrollBottom) {
1388               this.y--;
1389               this.scroll();
1390             }
1391             break;
1392
1393           // '\r'
1394           case '\r':
1395             this.x = 0;
1396             break;
1397
1398           // '\b'
1399           case '\x08':
1400             if (this.x > 0) {
1401               this.x--;
1402             }
1403             break;
1404
1405           // '\t'
1406           case '\t':
1407             this.x = this.nextStop();
1408             break;
1409
1410           // shift out
1411           case '\x0e':
1412             this.setgLevel(1);
1413             break;
1414
1415           // shift in
1416           case '\x0f':
1417             this.setgLevel(0);
1418             break;
1419
1420           // '\e'
1421           case '\x1b':
1422             this.state = escaped;
1423             break;
1424
1425           default:
1426             // ' '
1427             // calculate print space
1428             // expensive call, therefore we save width in line buffer
1429             ch_width = wcwidth(code);
1430
1431             if (ch >= ' ') {
1432               if (this.charset && this.charset[ch]) {
1433                 ch = this.charset[ch];
1434               }
1435
1436               row = this.y + this.ybase;
1437
1438               // insert combining char in last cell
1439               // FIXME: needs handling after cursor jumps
1440               if (!ch_width && this.x) {
1441                 // dont overflow left
1442                 if (this.lines.get(row)[this.x-1]) {
1443                   if (!this.lines.get(row)[this.x-1][2]) {
1444
1445                     // found empty cell after fullwidth, need to go 2 cells back
1446                     if (this.lines.get(row)[this.x-2])
1447                       this.lines.get(row)[this.x-2][1] += ch;
1448
1449                   } else {
1450                     this.lines.get(row)[this.x-1][1] += ch;
1451                   }
1452                   this.updateRange(this.y);
1453                 }
1454                 break;
1455               }
1456
1457               // goto next line if ch would overflow
1458               // TODO: needs a global min terminal width of 2
1459               if (this.x+ch_width-1 >= this.cols) {
1460                 // autowrap - DECAWM
1461                 if (this.wraparoundMode) {
1462                   this.x = 0;
1463                   this.y++;
1464                   if (this.y > this.scrollBottom) {
1465                     this.y--;
1466                     this.scroll();
1467                   }
1468                 } else {
1469                   this.x = this.cols-1;
1470                   if(ch_width===2)  // FIXME: check for xterm behavior
1471                     continue;
1472                 }
1473               }
1474               row = this.y + this.ybase;
1475
1476               // insert mode: move characters to right
1477               if (this.insertMode) {
1478                 // do this twice for a fullwidth char
1479                 for (var moves=0; moves<ch_width; ++moves) {
1480                   // remove last cell, if it's width is 0
1481                   // we have to adjust the second last cell as well
1482                   var removed = this.lines.get(this.y + this.ybase).pop();
1483                   if (removed[2]===0
1484                       && this.lines.get(row)[this.cols-2]
1485                   && this.lines.get(row)[this.cols-2][2]===2)
1486                     this.lines.get(row)[this.cols-2] = [this.curAttr, ' ', 1];
1487
1488                   // insert empty cell at cursor
1489                   this.lines.get(row).splice(this.x, 0, [this.curAttr, ' ', 1]);
1490                 }
1491               }
1492
1493               this.lines.get(row)[this.x] = [this.curAttr, ch, ch_width];
1494               this.x++;
1495               this.updateRange(this.y);
1496
1497               // fullwidth char - set next cell width to zero and advance cursor
1498               if (ch_width===2) {
1499                 this.lines.get(row)[this.x] = [this.curAttr, '', 0];
1500                 this.x++;
1501               }
1502             }
1503             break;
1504         }
1505         break;
1506       case escaped:
1507         switch (ch) {
1508           // ESC [ Control Sequence Introducer ( CSI is 0x9b).
1509           case '[':
1510             this.params = [];
1511             this.currentParam = 0;
1512             this.state = csi;
1513             break;
1514
1515           // ESC ] Operating System Command ( OSC is 0x9d).
1516           case ']':
1517             this.params = [];
1518             this.currentParam = 0;
1519             this.state = osc;
1520             break;
1521
1522           // ESC P Device Control String ( DCS is 0x90).
1523           case 'P':
1524             this.params = [];
1525             this.currentParam = 0;
1526             this.state = dcs;
1527             break;
1528
1529           // ESC _ Application Program Command ( APC is 0x9f).
1530           case '_':
1531             this.state = ignore;
1532             break;
1533
1534           // ESC ^ Privacy Message ( PM is 0x9e).
1535           case '^':
1536             this.state = ignore;
1537             break;
1538
1539           // ESC c Full Reset (RIS).
1540           case 'c':
1541             this.reset();
1542             break;
1543
1544           // ESC E Next Line ( NEL is 0x85).
1545           // ESC D Index ( IND is 0x84).
1546           case 'E':
1547             this.x = 0;
1548             ;
1549           case 'D':
1550             this.index();
1551             break;
1552
1553           // ESC M Reverse Index ( RI is 0x8d).
1554           case 'M':
1555             this.reverseIndex();
1556             break;
1557
1558           // ESC % Select default/utf-8 character set.
1559           // @ = default, G = utf-8
1560           case '%':
1561             //this.charset = null;
1562             this.setgLevel(0);
1563             this.setgCharset(0, Terminal.charsets.US);
1564             this.state = normal;
1565             i++;
1566             break;
1567
1568           // ESC (,),*,+,-,. Designate G0-G2 Character Set.
1569           case '(': // <-- this seems to get all the attention
1570           case ')':
1571           case '*':
1572           case '+':
1573           case '-':
1574           case '.':
1575             switch (ch) {
1576               case '(':
1577                 this.gcharset = 0;
1578                 break;
1579               case ')':
1580                 this.gcharset = 1;
1581                 break;
1582               case '*':
1583                 this.gcharset = 2;
1584                 break;
1585               case '+':
1586                 this.gcharset = 3;
1587                 break;
1588               case '-':
1589                 this.gcharset = 1;
1590                 break;
1591               case '.':
1592                 this.gcharset = 2;
1593                 break;
1594             }
1595             this.state = charset;
1596             break;
1597
1598           // Designate G3 Character Set (VT300).
1599           // A = ISO Latin-1 Supplemental.
1600           // Not implemented.
1601           case '/':
1602             this.gcharset = 3;
1603             this.state = charset;
1604             i--;
1605             break;
1606
1607           // ESC N
1608           // Single Shift Select of G2 Character Set
1609           // ( SS2 is 0x8e). This affects next character only.
1610           case 'N':
1611             break;
1612           // ESC O
1613           // Single Shift Select of G3 Character Set
1614           // ( SS3 is 0x8f). This affects next character only.
1615           case 'O':
1616             break;
1617           // ESC n
1618           // Invoke the G2 Character Set as GL (LS2).
1619           case 'n':
1620             this.setgLevel(2);
1621             break;
1622           // ESC o
1623           // Invoke the G3 Character Set as GL (LS3).
1624           case 'o':
1625             this.setgLevel(3);
1626             break;
1627           // ESC |
1628           // Invoke the G3 Character Set as GR (LS3R).
1629           case '|':
1630             this.setgLevel(3);
1631             break;
1632           // ESC }
1633           // Invoke the G2 Character Set as GR (LS2R).
1634           case '}':
1635             this.setgLevel(2);
1636             break;
1637           // ESC ~
1638           // Invoke the G1 Character Set as GR (LS1R).
1639           case '~':
1640             this.setgLevel(1);
1641             break;
1642
1643           // ESC 7 Save Cursor (DECSC).
1644           case '7':
1645             this.saveCursor();
1646             this.state = normal;
1647             break;
1648
1649           // ESC 8 Restore Cursor (DECRC).
1650           case '8':
1651             this.restoreCursor();
1652             this.state = normal;
1653             break;
1654
1655           // ESC # 3 DEC line height/width
1656           case '#':
1657             this.state = normal;
1658             i++;
1659             break;
1660
1661           // ESC H Tab Set (HTS is 0x88).
1662           case 'H':
1663             this.tabSet();
1664             break;
1665
1666           // ESC = Application Keypad (DECKPAM).
1667           case '=':
1668             this.log('Serial port requested application keypad.');
1669             this.applicationKeypad = true;
1670             this.viewport.syncScrollArea();
1671             this.state = normal;
1672             break;
1673
1674           // ESC > Normal Keypad (DECKPNM).
1675           case '>':
1676             this.log('Switching back to normal keypad.');
1677             this.applicationKeypad = false;
1678             this.viewport.syncScrollArea();
1679             this.state = normal;
1680             break;
1681
1682           default:
1683             this.state = normal;
1684             this.error('Unknown ESC control: %s.', ch);
1685             break;
1686         }
1687         break;
1688
1689       case charset:
1690         switch (ch) {
1691           case '0': // DEC Special Character and Line Drawing Set.
1692             cs = Terminal.charsets.SCLD;
1693             break;
1694           case 'A': // UK
1695             cs = Terminal.charsets.UK;
1696             break;
1697           case 'B': // United States (USASCII).
1698             cs = Terminal.charsets.US;
1699             break;
1700           case '4': // Dutch
1701             cs = Terminal.charsets.Dutch;
1702             break;
1703           case 'C': // Finnish
1704           case '5':
1705             cs = Terminal.charsets.Finnish;
1706             break;
1707           case 'R': // French
1708             cs = Terminal.charsets.French;
1709             break;
1710           case 'Q': // FrenchCanadian
1711             cs = Terminal.charsets.FrenchCanadian;
1712             break;
1713           case 'K': // German
1714             cs = Terminal.charsets.German;
1715             break;
1716           case 'Y': // Italian
1717             cs = Terminal.charsets.Italian;
1718             break;
1719           case 'E': // NorwegianDanish
1720           case '6':
1721             cs = Terminal.charsets.NorwegianDanish;
1722             break;
1723           case 'Z': // Spanish
1724             cs = Terminal.charsets.Spanish;
1725             break;
1726           case 'H': // Swedish
1727           case '7':
1728             cs = Terminal.charsets.Swedish;
1729             break;
1730           case '=': // Swiss
1731             cs = Terminal.charsets.Swiss;
1732             break;
1733           case '/': // ISOLatin (actually /A)
1734             cs = Terminal.charsets.ISOLatin;
1735             i++;
1736             break;
1737           default: // Default
1738             cs = Terminal.charsets.US;
1739             break;
1740         }
1741         this.setgCharset(this.gcharset, cs);
1742         this.gcharset = null;
1743         this.state = normal;
1744         break;
1745
1746       case osc:
1747         // OSC Ps ; Pt ST
1748         // OSC Ps ; Pt BEL
1749         //   Set Text Parameters.
1750         if (ch === '\x1b' || ch === '\x07') {
1751           if (ch === '\x1b') i++;
1752
1753           this.params.push(this.currentParam);
1754
1755           switch (this.params[0]) {
1756             case 0:
1757             case 1:
1758             case 2:
1759               if (this.params[1]) {
1760                 this.title = this.params[1];
1761                 this.handleTitle(this.title);
1762               }
1763               break;
1764             case 3:
1765               // set X property
1766               break;
1767             case 4:
1768             case 5:
1769               // change dynamic colors
1770               break;
1771             case 10:
1772             case 11:
1773             case 12:
1774             case 13:
1775             case 14:
1776             case 15:
1777             case 16:
1778             case 17:
1779             case 18:
1780             case 19:
1781               // change dynamic ui colors
1782               break;
1783             case 46:
1784               // change log file
1785               break;
1786             case 50:
1787               // dynamic font
1788               break;
1789             case 51:
1790               // emacs shell
1791               break;
1792             case 52:
1793               // manipulate selection data
1794               break;
1795             case 104:
1796             case 105:
1797             case 110:
1798             case 111:
1799             case 112:
1800             case 113:
1801             case 114:
1802             case 115:
1803             case 116:
1804             case 117:
1805             case 118:
1806               // reset colors
1807               break;
1808           }
1809
1810           this.params = [];
1811           this.currentParam = 0;
1812           this.state = normal;
1813         } else {
1814           if (!this.params.length) {
1815             if (ch >= '0' && ch <= '9') {
1816               this.currentParam =
1817                 this.currentParam * 10 + ch.charCodeAt(0) - 48;
1818             } else if (ch === ';') {
1819               this.params.push(this.currentParam);
1820               this.currentParam = '';
1821             }
1822           } else {
1823             this.currentParam += ch;
1824           }
1825         }
1826         break;
1827
1828       case csi:
1829         // '?', '>', '!'
1830         if (ch === '?' || ch === '>' || ch === '!') {
1831           this.prefix = ch;
1832           break;
1833         }
1834
1835         // 0 - 9
1836         if (ch >= '0' && ch <= '9') {
1837           this.currentParam = this.currentParam * 10 + ch.charCodeAt(0) - 48;
1838           break;
1839         }
1840
1841         // '$', '"', ' ', '\''
1842         if (ch === '$' || ch === '"' || ch === ' ' || ch === '\'') {
1843           this.postfix = ch;
1844           break;
1845         }
1846
1847         this.params.push(this.currentParam);
1848         this.currentParam = 0;
1849
1850         // ';'
1851         if (ch === ';') break;
1852
1853         this.state = normal;
1854
1855         switch (ch) {
1856           // CSI Ps A
1857           // Cursor Up Ps Times (default = 1) (CUU).
1858           case 'A':
1859             this.cursorUp(this.params);
1860             break;
1861
1862           // CSI Ps B
1863           // Cursor Down Ps Times (default = 1) (CUD).
1864           case 'B':
1865             this.cursorDown(this.params);
1866             break;
1867
1868           // CSI Ps C
1869           // Cursor Forward Ps Times (default = 1) (CUF).
1870           case 'C':
1871             this.cursorForward(this.params);
1872             break;
1873
1874           // CSI Ps D
1875           // Cursor Backward Ps Times (default = 1) (CUB).
1876           case 'D':
1877             this.cursorBackward(this.params);
1878             break;
1879
1880           // CSI Ps ; Ps H
1881           // Cursor Position [row;column] (default = [1,1]) (CUP).
1882           case 'H':
1883             this.cursorPos(this.params);
1884             break;
1885
1886           // CSI Ps J  Erase in Display (ED).
1887           case 'J':
1888             this.eraseInDisplay(this.params);
1889             break;
1890
1891           // CSI Ps K  Erase in Line (EL).
1892           case 'K':
1893             this.eraseInLine(this.params);
1894             break;
1895
1896           // CSI Pm m  Character Attributes (SGR).
1897           case 'm':
1898             if (!this.prefix) {
1899               this.charAttributes(this.params);
1900             }
1901             break;
1902
1903           // CSI Ps n  Device Status Report (DSR).
1904           case 'n':
1905             if (!this.prefix) {
1906               this.deviceStatus(this.params);
1907             }
1908             break;
1909
1910             /**
1911              * Additions
1912              */
1913
1914           // CSI Ps @
1915           // Insert Ps (Blank) Character(s) (default = 1) (ICH).
1916           case '@':
1917             this.insertChars(this.params);
1918             break;
1919
1920           // CSI Ps E
1921           // Cursor Next Line Ps Times (default = 1) (CNL).
1922           case 'E':
1923             this.cursorNextLine(this.params);
1924             break;
1925
1926           // CSI Ps F
1927           // Cursor Preceding Line Ps Times (default = 1) (CNL).
1928           case 'F':
1929             this.cursorPrecedingLine(this.params);
1930             break;
1931
1932           // CSI Ps G
1933           // Cursor Character Absolute  [column] (default = [row,1]) (CHA).
1934           case 'G':
1935             this.cursorCharAbsolute(this.params);
1936             break;
1937
1938           // CSI Ps L
1939           // Insert Ps Line(s) (default = 1) (IL).
1940           case 'L':
1941             this.insertLines(this.params);
1942             break;
1943
1944           // CSI Ps M
1945           // Delete Ps Line(s) (default = 1) (DL).
1946           case 'M':
1947             this.deleteLines(this.params);
1948             break;
1949
1950           // CSI Ps P
1951           // Delete Ps Character(s) (default = 1) (DCH).
1952           case 'P':
1953             this.deleteChars(this.params);
1954             break;
1955
1956           // CSI Ps X
1957           // Erase Ps Character(s) (default = 1) (ECH).
1958           case 'X':
1959             this.eraseChars(this.params);
1960             break;
1961
1962           // CSI Pm `  Character Position Absolute
1963           //   [column] (default = [row,1]) (HPA).
1964           case '`':
1965             this.charPosAbsolute(this.params);
1966             break;
1967
1968           // 141 61 a * HPR -
1969           // Horizontal Position Relative
1970           case 'a':
1971             this.HPositionRelative(this.params);
1972             break;
1973
1974           // CSI P s c
1975           // Send Device Attributes (Primary DA).
1976           // CSI > P s c
1977           // Send Device Attributes (Secondary DA)
1978           case 'c':
1979             this.sendDeviceAttributes(this.params);
1980             break;
1981
1982           // CSI Pm d
1983           // Line Position Absolute  [row] (default = [1,column]) (VPA).
1984           case 'd':
1985             this.linePosAbsolute(this.params);
1986             break;
1987
1988           // 145 65 e * VPR - Vertical Position Relative
1989           case 'e':
1990             this.VPositionRelative(this.params);
1991             break;
1992
1993           // CSI Ps ; Ps f
1994           //   Horizontal and Vertical Position [row;column] (default =
1995           //   [1,1]) (HVP).
1996           case 'f':
1997             this.HVPosition(this.params);
1998             break;
1999
2000           // CSI Pm h  Set Mode (SM).
2001           // CSI ? Pm h - mouse escape codes, cursor escape codes
2002           case 'h':
2003             this.setMode(this.params);
2004             break;
2005
2006           // CSI Pm l  Reset Mode (RM).
2007           // CSI ? Pm l
2008           case 'l':
2009             this.resetMode(this.params);
2010             break;
2011
2012           // CSI Ps ; Ps r
2013           //   Set Scrolling Region [top;bottom] (default = full size of win-
2014           //   dow) (DECSTBM).
2015           // CSI ? Pm r
2016           case 'r':
2017             this.setScrollRegion(this.params);
2018             break;
2019
2020           // CSI s
2021           //   Save cursor (ANSI.SYS).
2022           case 's':
2023             this.saveCursor(this.params);
2024             break;
2025
2026           // CSI u
2027           //   Restore cursor (ANSI.SYS).
2028           case 'u':
2029             this.restoreCursor(this.params);
2030             break;
2031
2032             /**
2033              * Lesser Used
2034              */
2035
2036           // CSI Ps I
2037           // Cursor Forward Tabulation Ps tab stops (default = 1) (CHT).
2038           case 'I':
2039             this.cursorForwardTab(this.params);
2040             break;
2041
2042           // CSI Ps S  Scroll up Ps lines (default = 1) (SU).
2043           case 'S':
2044             this.scrollUp(this.params);
2045             break;
2046
2047           // CSI Ps T  Scroll down Ps lines (default = 1) (SD).
2048           // CSI Ps ; Ps ; Ps ; Ps ; Ps T
2049           // CSI > Ps; Ps T
2050           case 'T':
2051             // if (this.prefix === '>') {
2052             //   this.resetTitleModes(this.params);
2053             //   break;
2054             // }
2055             // if (this.params.length > 2) {
2056             //   this.initMouseTracking(this.params);
2057             //   break;
2058             // }
2059             if (this.params.length < 2 && !this.prefix) {
2060               this.scrollDown(this.params);
2061             }
2062             break;
2063
2064           // CSI Ps Z
2065           // Cursor Backward Tabulation Ps tab stops (default = 1) (CBT).
2066           case 'Z':
2067             this.cursorBackwardTab(this.params);
2068             break;
2069
2070           // CSI Ps b  Repeat the preceding graphic character Ps times (REP).
2071           case 'b':
2072             this.repeatPrecedingCharacter(this.params);
2073             break;
2074
2075           // CSI Ps g  Tab Clear (TBC).
2076           case 'g':
2077             this.tabClear(this.params);
2078             break;
2079
2080             // CSI Pm i  Media Copy (MC).
2081             // CSI ? Pm i
2082             // case 'i':
2083             //   this.mediaCopy(this.params);
2084             //   break;
2085
2086             // CSI Pm m  Character Attributes (SGR).
2087             // CSI > Ps; Ps m
2088             // case 'm': // duplicate
2089             //   if (this.prefix === '>') {
2090             //     this.setResources(this.params);
2091             //   } else {
2092             //     this.charAttributes(this.params);
2093             //   }
2094             //   break;
2095
2096             // CSI Ps n  Device Status Report (DSR).
2097             // CSI > Ps n
2098             // case 'n': // duplicate
2099             //   if (this.prefix === '>') {
2100             //     this.disableModifiers(this.params);
2101             //   } else {
2102             //     this.deviceStatus(this.params);
2103             //   }
2104             //   break;
2105
2106             // CSI > Ps p  Set pointer mode.
2107             // CSI ! p   Soft terminal reset (DECSTR).
2108             // CSI Ps$ p
2109             //   Request ANSI mode (DECRQM).
2110             // CSI ? Ps$ p
2111             //   Request DEC private mode (DECRQM).
2112             // CSI Ps ; Ps " p
2113           case 'p':
2114             switch (this.prefix) {
2115                 // case '>':
2116                 //   this.setPointerMode(this.params);
2117                 //   break;
2118               case '!':
2119                 this.softReset(this.params);
2120                 break;
2121                 // case '?':
2122                 //   if (this.postfix === '$') {
2123                 //     this.requestPrivateMode(this.params);
2124                 //   }
2125                 //   break;
2126                 // default:
2127                 //   if (this.postfix === '"') {
2128                 //     this.setConformanceLevel(this.params);
2129                 //   } else if (this.postfix === '$') {
2130                 //     this.requestAnsiMode(this.params);
2131                 //   }
2132                 //   break;
2133             }
2134             break;
2135
2136             // CSI Ps q  Load LEDs (DECLL).
2137             // CSI Ps SP q
2138             // CSI Ps " q
2139             // case 'q':
2140             //   if (this.postfix === ' ') {
2141             //     this.setCursorStyle(this.params);
2142             //     break;
2143             //   }
2144             //   if (this.postfix === '"') {
2145             //     this.setCharProtectionAttr(this.params);
2146             //     break;
2147             //   }
2148             //   this.loadLEDs(this.params);
2149             //   break;
2150
2151             // CSI Ps ; Ps r
2152             //   Set Scrolling Region [top;bottom] (default = full size of win-
2153             //   dow) (DECSTBM).
2154             // CSI ? Pm r
2155             // CSI Pt; Pl; Pb; Pr; Ps$ r
2156             // case 'r': // duplicate
2157             //   if (this.prefix === '?') {
2158             //     this.restorePrivateValues(this.params);
2159             //   } else if (this.postfix === '$') {
2160             //     this.setAttrInRectangle(this.params);
2161             //   } else {
2162             //     this.setScrollRegion(this.params);
2163             //   }
2164             //   break;
2165
2166             // CSI s     Save cursor (ANSI.SYS).
2167             // CSI ? Pm s
2168             // case 's': // duplicate
2169             //   if (this.prefix === '?') {
2170             //     this.savePrivateValues(this.params);
2171             //   } else {
2172             //     this.saveCursor(this.params);
2173             //   }
2174             //   break;
2175
2176             // CSI Ps ; Ps ; Ps t
2177             // CSI Pt; Pl; Pb; Pr; Ps$ t
2178             // CSI > Ps; Ps t
2179             // CSI Ps SP t
2180             // case 't':
2181             //   if (this.postfix === '$') {
2182             //     this.reverseAttrInRectangle(this.params);
2183             //   } else if (this.postfix === ' ') {
2184             //     this.setWarningBellVolume(this.params);
2185             //   } else {
2186             //     if (this.prefix === '>') {
2187             //       this.setTitleModeFeature(this.params);
2188             //     } else {
2189             //       this.manipulateWindow(this.params);
2190             //     }
2191             //   }
2192             //   break;
2193
2194             // CSI u     Restore cursor (ANSI.SYS).
2195             // CSI Ps SP u
2196             // case 'u': // duplicate
2197             //   if (this.postfix === ' ') {
2198             //     this.setMarginBellVolume(this.params);
2199             //   } else {
2200             //     this.restoreCursor(this.params);
2201             //   }
2202             //   break;
2203
2204             // CSI Pt; Pl; Pb; Pr; Pp; Pt; Pl; Pp$ v
2205             // case 'v':
2206             //   if (this.postfix === '$') {
2207             //     this.copyRectagle(this.params);
2208             //   }
2209             //   break;
2210
2211             // CSI Pt ; Pl ; Pb ; Pr ' w
2212             // case 'w':
2213             //   if (this.postfix === '\'') {
2214             //     this.enableFilterRectangle(this.params);
2215             //   }
2216             //   break;
2217
2218             // CSI Ps x  Request Terminal Parameters (DECREQTPARM).
2219             // CSI Ps x  Select Attribute Change Extent (DECSACE).
2220             // CSI Pc; Pt; Pl; Pb; Pr$ x
2221             // case 'x':
2222             //   if (this.postfix === '$') {
2223             //     this.fillRectangle(this.params);
2224             //   } else {
2225             //     this.requestParameters(this.params);
2226             //     //this.__(this.params);
2227             //   }
2228             //   break;
2229
2230             // CSI Ps ; Pu ' z
2231             // CSI Pt; Pl; Pb; Pr$ z
2232             // case 'z':
2233             //   if (this.postfix === '\'') {
2234             //     this.enableLocatorReporting(this.params);
2235             //   } else if (this.postfix === '$') {
2236             //     this.eraseRectangle(this.params);
2237             //   }
2238             //   break;
2239
2240             // CSI Pm ' {
2241             // CSI Pt; Pl; Pb; Pr$ {
2242             // case '{':
2243             //   if (this.postfix === '\'') {
2244             //     this.setLocatorEvents(this.params);
2245             //   } else if (this.postfix === '$') {
2246             //     this.selectiveEraseRectangle(this.params);
2247             //   }
2248             //   break;
2249
2250             // CSI Ps ' |
2251             // case '|':
2252             //   if (this.postfix === '\'') {
2253             //     this.requestLocatorPosition(this.params);
2254             //   }
2255             //   break;
2256
2257             // CSI P m SP }
2258             // Insert P s Column(s) (default = 1) (DECIC), VT420 and up.
2259             // case '}':
2260             //   if (this.postfix === ' ') {
2261             //     this.insertColumns(this.params);
2262             //   }
2263             //   break;
2264
2265             // CSI P m SP ~
2266             // Delete P s Column(s) (default = 1) (DECDC), VT420 and up
2267             // case '~':
2268             //   if (this.postfix === ' ') {
2269             //     this.deleteColumns(this.params);
2270             //   }
2271             //   break;
2272
2273           default:
2274             this.error('Unknown CSI code: %s.', ch);
2275             break;
2276         }
2277
2278         this.prefix = '';
2279         this.postfix = '';
2280         break;
2281
2282       case dcs:
2283         if (ch === '\x1b' || ch === '\x07') {
2284           if (ch === '\x1b') i++;
2285
2286           switch (this.prefix) {
2287             // User-Defined Keys (DECUDK).
2288             case '':
2289               break;
2290
2291             // Request Status String (DECRQSS).
2292             // test: echo -e '\eP$q"p\e\\'
2293             case '$q':
2294               var pt = this.currentParam
2295               , valid = false;
2296
2297               switch (pt) {
2298                 // DECSCA
2299                 case '"q':
2300                   pt = '0"q';
2301                   break;
2302
2303                 // DECSCL
2304                 case '"p':
2305                   pt = '61"p';
2306                   break;
2307
2308                 // DECSTBM
2309                 case 'r':
2310                   pt = ''
2311                     + (this.scrollTop + 1)
2312                     + ';'
2313                     + (this.scrollBottom + 1)
2314                     + 'r';
2315                   break;
2316
2317                 // SGR
2318                 case 'm':
2319                   pt = '0m';
2320                   break;
2321
2322                 default:
2323                   this.error('Unknown DCS Pt: %s.', pt);
2324                   pt = '';
2325                   break;
2326               }
2327
2328               this.send('\x1bP' + +valid + '$r' + pt + '\x1b\\');
2329               break;
2330
2331             // Set Termcap/Terminfo Data (xterm, experimental).
2332             case '+p':
2333               break;
2334
2335             // Request Termcap/Terminfo String (xterm, experimental)
2336             // Regular xterm does not even respond to this sequence.
2337             // This can cause a small glitch in vim.
2338             // test: echo -ne '\eP+q6b64\e\\'
2339             case '+q':
2340               var pt = this.currentParam
2341               , valid = false;
2342
2343               this.send('\x1bP' + +valid + '+r' + pt + '\x1b\\');
2344               break;
2345
2346             default:
2347               this.error('Unknown DCS prefix: %s.', this.prefix);
2348               break;
2349           }
2350
2351           this.currentParam = 0;
2352           this.prefix = '';
2353           this.state = normal;
2354         } else if (!this.currentParam) {
2355           if (!this.prefix && ch !== '$' && ch !== '+') {
2356             this.currentParam = ch;
2357           } else if (this.prefix.length === 2) {
2358             this.currentParam = ch;
2359           } else {
2360             this.prefix += ch;
2361           }
2362         } else {
2363           this.currentParam += ch;
2364         }
2365         break;
2366
2367       case ignore:
2368         // For PM and APC.
2369         if (ch === '\x1b' || ch === '\x07') {
2370           if (ch === '\x1b') i++;
2371           this.state = normal;
2372         }
2373         break;
2374     }
2375   }
2376
2377   this.updateRange(this.y);
2378   this.refresh(this.refreshStart, this.refreshEnd);
2379 };
2380
2381 /**
2382  * Writes text to the terminal, followed by a break line character (\n).
2383  * @param {string} text The text to write to the terminal.
2384  */
2385 Terminal.prototype.writeln = function(data) {
2386   this.write(data + '\r\n');
2387 };
2388
2389 /**
2390  * Attaches a custom keydown handler which is run before keys are processed, giving consumers of
2391  * xterm.js ultimate control as to what keys should be processed by the terminal and what keys
2392  * should not.
2393  * @param {function} customKeydownHandler The custom KeyboardEvent handler to attach. This is a
2394  *   function that takes a KeyboardEvent, allowing consumers to stop propogation and/or prevent
2395  *   the default action. The function returns whether the event should be processed by xterm.js.
2396  */
2397 Terminal.prototype.attachCustomKeydownHandler = function(customKeydownHandler) {
2398   this.customKeydownHandler = customKeydownHandler;
2399 }
2400
2401 /**
2402  * Handle a keydown event
2403  * Key Resources:
2404  *   - https://developer.mozilla.org/en-US/docs/DOM/KeyboardEvent
2405  * @param {KeyboardEvent} ev The keydown event to be handled.
2406  */
2407 Terminal.prototype.keyDown = function(ev) {
2408   if (this.customKeydownHandler && this.customKeydownHandler(ev) === false) {
2409     return false;
2410   }
2411
2412   if (!this.compositionHelper.keydown.bind(this.compositionHelper)(ev)) {
2413     if (this.ybase !== this.ydisp) {
2414       this.scrollToBottom();
2415     }
2416     return false;
2417   }
2418
2419   var self = this;
2420   var result = this.evaluateKeyEscapeSequence(ev);
2421
2422   if (result.scrollDisp) {
2423     this.scrollDisp(result.scrollDisp);
2424     return this.cancel(ev, true);
2425   }
2426
2427   if (isThirdLevelShift(this, ev)) {
2428     return true;
2429   }
2430
2431   if (result.cancel) {
2432     // The event is canceled at the end already, is this necessary?
2433     this.cancel(ev, true);
2434   }
2435
2436   if (!result.key) {
2437     return true;
2438   }
2439
2440   this.emit('keydown', ev);
2441   this.emit('key', result.key, ev);
2442   this.showCursor();
2443   this.handler(result.key);
2444
2445   return this.cancel(ev, true);
2446 };
2447
2448 /**
2449  * Returns an object that determines how a KeyboardEvent should be handled. The key of the
2450  * returned value is the new key code to pass to the PTY.
2451  *
2452  * Reference: http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
2453  * @param {KeyboardEvent} ev The keyboard event to be translated to key escape sequence.
2454  */
2455 Terminal.prototype.evaluateKeyEscapeSequence = function(ev) {
2456   var result = {
2457     // Whether to cancel event propogation (NOTE: this may not be needed since the event is
2458     // canceled at the end of keyDown
2459     cancel: false,
2460     // The new key even to emit
2461     key: undefined,
2462     // The number of characters to scroll, if this is defined it will cancel the event
2463     scrollDisp: undefined
2464   };
2465   var modifiers = ev.shiftKey << 0 | ev.altKey << 1 | ev.ctrlKey << 2 | ev.metaKey << 3;
2466   switch (ev.keyCode) {
2467     case 8:
2468       // backspace
2469       if (ev.shiftKey) {
2470         result.key = '\x08'; // ^H
2471         break;
2472       }
2473       result.key = '\x7f'; // ^?
2474       break;
2475     case 9:
2476       // tab
2477       if (ev.shiftKey) {
2478         result.key = '\x1b[Z';
2479         break;
2480       }
2481       result.key = '\t';
2482       result.cancel = true;
2483       break;
2484     case 13:
2485       // return/enter
2486       result.key = '\r';
2487       result.cancel = true;
2488       break;
2489     case 27:
2490       // escape
2491       result.key = '\x1b';
2492       result.cancel = true;
2493       break;
2494     case 37:
2495       // left-arrow
2496       if (modifiers) {
2497         result.key = '\x1b[1;' + (modifiers + 1) + 'D';
2498         // HACK: Make Alt + left-arrow behave like Ctrl + left-arrow: move one word backwards
2499         // http://unix.stackexchange.com/a/108106
2500         if (result.key == '\x1b[1;3D') {
2501           result.key = '\x1b[1;5D';
2502         }
2503       } else if (this.applicationCursor) {
2504         result.key = '\x1bOD';
2505       } else {
2506         result.key = '\x1b[D';
2507       }
2508       break;
2509     case 39:
2510       // right-arrow
2511       if (modifiers) {
2512         result.key = '\x1b[1;' + (modifiers + 1) + 'C';
2513         // HACK: Make Alt + right-arrow behave like Ctrl + right-arrow: move one word forward
2514         // http://unix.stackexchange.com/a/108106
2515         if (result.key == '\x1b[1;3C') {
2516           result.key = '\x1b[1;5C';
2517         }
2518       } else if (this.applicationCursor) {
2519         result.key = '\x1bOC';
2520       } else {
2521         result.key = '\x1b[C';
2522       }
2523       break;
2524     case 38:
2525       // up-arrow
2526       if (modifiers) {
2527         result.key = '\x1b[1;' + (modifiers + 1) + 'A';
2528         // HACK: Make Alt + up-arrow behave like Ctrl + up-arrow
2529         // http://unix.stackexchange.com/a/108106
2530         if (result.key == '\x1b[1;3A') {
2531           result.key = '\x1b[1;5A';
2532         }
2533       } else if (this.applicationCursor) {
2534         result.key = '\x1bOA';
2535       } else {
2536         result.key = '\x1b[A';
2537       }
2538       break;
2539     case 40:
2540       // down-arrow
2541       if (modifiers) {
2542         result.key = '\x1b[1;' + (modifiers + 1) + 'B';
2543         // HACK: Make Alt + down-arrow behave like Ctrl + down-arrow
2544         // http://unix.stackexchange.com/a/108106
2545         if (result.key == '\x1b[1;3B') {
2546           result.key = '\x1b[1;5B';
2547         }
2548       } else if (this.applicationCursor) {
2549         result.key = '\x1bOB';
2550       } else {
2551         result.key = '\x1b[B';
2552       }
2553       break;
2554     case 45:
2555       // insert
2556       if (!ev.shiftKey && !ev.ctrlKey) {
2557         // <Ctrl> or <Shift> + <Insert> are used to
2558         // copy-paste on some systems.
2559         result.key = '\x1b[2~';
2560       }
2561       break;
2562     case 46:
2563       // delete
2564       if (modifiers) {
2565         result.key = '\x1b[3;' + (modifiers + 1) + '~';
2566       } else {
2567         result.key = '\x1b[3~';
2568       }
2569       break;
2570     case 36:
2571       // home
2572       if (modifiers)
2573         result.key = '\x1b[1;' + (modifiers + 1) + 'H';
2574       else if (this.applicationCursor)
2575         result.key = '\x1bOH';
2576       else
2577         result.key = '\x1b[H';
2578       break;
2579     case 35:
2580       // end
2581       if (modifiers)
2582         result.key = '\x1b[1;' + (modifiers + 1) + 'F';
2583       else if (this.applicationCursor)
2584         result.key = '\x1bOF';
2585       else
2586         result.key = '\x1b[F';
2587       break;
2588     case 33:
2589       // page up
2590       if (ev.shiftKey) {
2591         result.scrollDisp = -(this.rows - 1);
2592       } else {
2593         result.key = '\x1b[5~';
2594       }
2595       break;
2596     case 34:
2597       // page down
2598       if (ev.shiftKey) {
2599         result.scrollDisp = this.rows - 1;
2600       } else {
2601         result.key = '\x1b[6~';
2602       }
2603       break;
2604     case 112:
2605       // F1-F12
2606       if (modifiers) {
2607         result.key = '\x1b[1;' + (modifiers + 1) + 'P';
2608       } else {
2609         result.key = '\x1bOP';
2610       }
2611       break;
2612     case 113:
2613       if (modifiers) {
2614         result.key = '\x1b[1;' + (modifiers + 1) + 'Q';
2615       } else {
2616         result.key = '\x1bOQ';
2617       }
2618       break;
2619     case 114:
2620       if (modifiers) {
2621         result.key = '\x1b[1;' + (modifiers + 1) + 'R';
2622       } else {
2623         result.key = '\x1bOR';
2624       }
2625       break;
2626     case 115:
2627       if (modifiers) {
2628         result.key = '\x1b[1;' + (modifiers + 1) + 'S';
2629       } else {
2630         result.key = '\x1bOS';
2631       }
2632       break;
2633     case 116:
2634       if (modifiers) {
2635         result.key = '\x1b[15;' + (modifiers + 1) + '~';
2636       } else {
2637         result.key = '\x1b[15~';
2638       }
2639       break;
2640     case 117:
2641       if (modifiers) {
2642         result.key = '\x1b[17;' + (modifiers + 1) + '~';
2643       } else {
2644         result.key = '\x1b[17~';
2645       }
2646       break;
2647     case 118:
2648       if (modifiers) {
2649         result.key = '\x1b[18;' + (modifiers + 1) + '~';
2650       } else {
2651         result.key = '\x1b[18~';
2652       }
2653       break;
2654     case 119:
2655       if (modifiers) {
2656         result.key = '\x1b[19;' + (modifiers + 1) + '~';
2657       } else {
2658         result.key = '\x1b[19~';
2659       }
2660       break;
2661     case 120:
2662       if (modifiers) {
2663         result.key = '\x1b[20;' + (modifiers + 1) + '~';
2664       } else {
2665         result.key = '\x1b[20~';
2666       }
2667       break;
2668     case 121:
2669       if (modifiers) {
2670         result.key = '\x1b[21;' + (modifiers + 1) + '~';
2671       } else {
2672         result.key = '\x1b[21~';
2673       }
2674       break;
2675     case 122:
2676       if (modifiers) {
2677         result.key = '\x1b[23;' + (modifiers + 1) + '~';
2678       } else {
2679         result.key = '\x1b[23~';
2680       }
2681       break;
2682     case 123:
2683       if (modifiers) {
2684         result.key = '\x1b[24;' + (modifiers + 1) + '~';
2685       } else {
2686         result.key = '\x1b[24~';
2687       }
2688       break;
2689     default:
2690       // a-z and space
2691       if (ev.ctrlKey && !ev.shiftKey && !ev.altKey && !ev.metaKey) {
2692         if (ev.keyCode >= 65 && ev.keyCode <= 90) {
2693           result.key = String.fromCharCode(ev.keyCode - 64);
2694         } else if (ev.keyCode === 32) {
2695           // NUL
2696           result.key = String.fromCharCode(0);
2697         } else if (ev.keyCode >= 51 && ev.keyCode <= 55) {
2698           // escape, file sep, group sep, record sep, unit sep
2699           result.key = String.fromCharCode(ev.keyCode - 51 + 27);
2700         } else if (ev.keyCode === 56) {
2701           // delete
2702           result.key = String.fromCharCode(127);
2703         } else if (ev.keyCode === 219) {
2704           // ^[ - Control Sequence Introducer (CSI)
2705           result.key = String.fromCharCode(27);
2706         } else if (ev.keyCode === 220) {
2707           // ^\ - String Terminator (ST)
2708           result.key = String.fromCharCode(28);
2709         } else if (ev.keyCode === 221) {
2710           // ^] - Operating System Command (OSC)
2711           result.key = String.fromCharCode(29);
2712         }
2713       } else if (!this.browser.isMac && ev.altKey && !ev.ctrlKey && !ev.metaKey) {
2714         // On Mac this is a third level shift. Use <Esc> instead.
2715         if (ev.keyCode >= 65 && ev.keyCode <= 90) {
2716           result.key = '\x1b' + String.fromCharCode(ev.keyCode + 32);
2717         } else if (ev.keyCode === 192) {
2718           result.key = '\x1b`';
2719         } else if (ev.keyCode >= 48 && ev.keyCode <= 57) {
2720           result.key = '\x1b' + (ev.keyCode - 48);
2721         }
2722       }
2723       break;
2724   }
2725   return result;
2726 };
2727
2728 /**
2729  * Set the G level of the terminal
2730  * @param g
2731  */
2732 Terminal.prototype.setgLevel = function(g) {
2733   this.glevel = g;
2734   this.charset = this.charsets[g];
2735 };
2736
2737 /**
2738  * Set the charset for the given G level of the terminal
2739  * @param g
2740  * @param charset
2741  */
2742 Terminal.prototype.setgCharset = function(g, charset) {
2743   this.charsets[g] = charset;
2744   if (this.glevel === g) {
2745     this.charset = charset;
2746   }
2747 };
2748
2749 /**
2750  * Handle a keypress event.
2751  * Key Resources:
2752  *   - https://developer.mozilla.org/en-US/docs/DOM/KeyboardEvent
2753  * @param {KeyboardEvent} ev The keypress event to be handled.
2754  */
2755 Terminal.prototype.keyPress = function(ev) {
2756   var key;
2757
2758   this.cancel(ev);
2759
2760   if (ev.charCode) {
2761     key = ev.charCode;
2762   } else if (ev.which == null) {
2763     key = ev.keyCode;
2764   } else if (ev.which !== 0 && ev.charCode !== 0) {
2765     key = ev.which;
2766   } else {
2767     return false;
2768   }
2769
2770   if (!key || (
2771     (ev.altKey || ev.ctrlKey || ev.metaKey) && !isThirdLevelShift(this, ev)
2772   )) {
2773     return false;
2774   }
2775
2776   key = String.fromCharCode(key);
2777
2778   this.emit('keypress', key, ev);
2779   this.emit('key', key, ev);
2780   this.showCursor();
2781   this.handler(key);
2782
2783   return false;
2784 };
2785
2786 /**
2787  * Send data for handling to the terminal
2788  * @param {string} data
2789  */
2790 Terminal.prototype.send = function(data) {
2791   var self = this;
2792
2793   if (!this.queue) {
2794     setTimeout(function() {
2795       self.handler(self.queue);
2796       self.queue = '';
2797     }, 1);
2798   }
2799
2800   this.queue += data;
2801 };
2802
2803 /**
2804  * Ring the bell.
2805  * Note: We could do sweet things with webaudio here
2806  */
2807 Terminal.prototype.bell = function() {
2808   if (!this.visualBell) return;
2809   var self = this;
2810   this.element.style.borderColor = 'white';
2811   setTimeout(function() {
2812     self.element.style.borderColor = '';
2813   }, 10);
2814   if (this.popOnBell) this.focus();
2815 };
2816
2817 /**
2818  * Log the current state to the console.
2819  */
2820 Terminal.prototype.log = function() {
2821   if (!this.debug) return;
2822   if (!this.context.console || !this.context.console.log) return;
2823   var args = Array.prototype.slice.call(arguments);
2824   this.context.console.log.apply(this.context.console, args);
2825 };
2826
2827 /**
2828  * Log the current state as error to the console.
2829  */
2830 Terminal.prototype.error = function() {
2831   if (!this.debug) return;
2832   if (!this.context.console || !this.context.console.error) return;
2833   var args = Array.prototype.slice.call(arguments);
2834   this.context.console.error.apply(this.context.console, args);
2835 };
2836
2837 /**
2838  * Resizes the terminal.
2839  *
2840  * @param {number} x The number of columns to resize to.
2841  * @param {number} y The number of rows to resize to.
2842  */
2843 Terminal.prototype.resize = function(x, y) {
2844   var line
2845   , el
2846   , i
2847   , j
2848   , ch
2849   , addToY;
2850
2851   if (x === this.cols && y === this.rows) {
2852     return;
2853   }
2854
2855   if (x < 1) x = 1;
2856   if (y < 1) y = 1;
2857
2858   // resize cols
2859   j = this.cols;
2860   if (j < x) {
2861     ch = [this.defAttr, ' ', 1]; // does xterm use the default attr?
2862     i = this.lines.length;
2863     while (i--) {
2864       while (this.lines.get(i).length < x) {
2865         this.lines.get(i).push(ch);
2866       }
2867     }
2868   } else { // (j > x)
2869     i = this.lines.length;
2870     while (i--) {
2871       while (this.lines.get(i).length > x) {
2872         this.lines.get(i).pop();
2873       }
2874     }
2875   }
2876   this.setupStops(j);
2877   this.cols = x;
2878
2879   // resize rows
2880   j = this.rows;
2881   addToY = 0;
2882   if (j < y) {
2883     el = this.element;
2884     while (j++ < y) {
2885       // y is rows, not this.y
2886       if (this.lines.length < y + this.ybase) {
2887         if (this.ybase > 0 && this.lines.length <= this.ybase + this.y + addToY + 1) {
2888           // There is room above the buffer and there are no empty elements below the line,
2889           // scroll up
2890           this.ybase--;
2891           addToY++
2892           if (this.ydisp > 0) {
2893             // Viewport is at the top of the buffer, must increase downwards
2894             this.ydisp--;
2895           }
2896         } else {
2897           // Add a blank line if there is no buffer left at the top to scroll to, or if there
2898           // are blank lines after the cursor
2899           this.lines.push(this.blankLine());
2900         }
2901       }
2902       if (this.children.length < y) {
2903         this.insertRow();
2904       }
2905     }
2906   } else { // (j > y)
2907     while (j-- > y) {
2908       if (this.lines.length > y + this.ybase) {
2909         if (this.lines.length > this.ybase + this.y + 1) {
2910           // The line is a blank line below the cursor, remove it
2911           this.lines.pop();
2912         } else {
2913           // The line is the cursor, scroll down
2914           this.ybase++;
2915           this.ydisp++;
2916         }
2917       }
2918       if (this.children.length > y) {
2919         el = this.children.shift();
2920         if (!el) continue;
2921         el.parentNode.removeChild(el);
2922       }
2923     }
2924   }
2925   this.rows = y;
2926
2927   // Make sure that the cursor stays on screen
2928   if (this.y >= y) {
2929     this.y = y - 1;
2930   }
2931   if (addToY) {
2932     this.y += addToY;
2933   }
2934
2935   if (this.x >= x) {
2936     this.x = x - 1;
2937   }
2938
2939   this.scrollTop = 0;
2940   this.scrollBottom = y - 1;
2941
2942   this.refresh(0, this.rows - 1);
2943
2944   this.normal = null;
2945
2946   this.geometry = [this.cols, this.rows];
2947   this.emit('resize', {terminal: this, cols: x, rows: y});
2948 };
2949
2950 /**
2951  * Updates the range of rows to refresh
2952  * @param {number} y The number of rows to refresh next.
2953  */
2954 Terminal.prototype.updateRange = function(y) {
2955   if (y < this.refreshStart) this.refreshStart = y;
2956   if (y > this.refreshEnd) this.refreshEnd = y;
2957   // if (y > this.refreshEnd) {
2958   //   this.refreshEnd = y;
2959   //   if (y > this.rows - 1) {
2960   //     this.refreshEnd = this.rows - 1;
2961   //   }
2962   // }
2963 };
2964
2965 /**
2966  * Set the range of refreshing to the maximum value
2967  */
2968 Terminal.prototype.maxRange = function() {
2969   this.refreshStart = 0;
2970   this.refreshEnd = this.rows - 1;
2971 };
2972
2973
2974
2975 /**
2976  * Setup the tab stops.
2977  * @param {number} i
2978  */
2979 Terminal.prototype.setupStops = function(i) {
2980   if (i != null) {
2981     if (!this.tabs[i]) {
2982       i = this.prevStop(i);
2983     }
2984   } else {
2985     this.tabs = {};
2986     i = 0;
2987   }
2988
2989   for (; i < this.cols; i += 8) {
2990     this.tabs[i] = true;
2991   }
2992 };
2993
2994
2995 /**
2996  * Move the cursor to the previous tab stop from the given position (default is current).
2997  * @param {number} x The position to move the cursor to the previous tab stop.
2998  */
2999 Terminal.prototype.prevStop = function(x) {
3000   if (x == null) x = this.x;
3001   while (!this.tabs[--x] && x > 0);
3002   return x >= this.cols
3003     ? this.cols - 1
3004   : x < 0 ? 0 : x;
3005 };
3006
3007
3008 /**
3009  * Move the cursor one tab stop forward from the given position (default is current).
3010  * @param {number} x The position to move the cursor one tab stop forward.
3011  */
3012 Terminal.prototype.nextStop = function(x) {
3013   if (x == null) x = this.x;
3014   while (!this.tabs[++x] && x < this.cols);
3015   return x >= this.cols
3016     ? this.cols - 1
3017   : x < 0 ? 0 : x;
3018 };
3019
3020
3021 /**
3022  * Erase in the identified line everything from "x" to the end of the line (right).
3023  * @param {number} x The column from which to start erasing to the end of the line.
3024  * @param {number} y The line in which to operate.
3025  */
3026 Terminal.prototype.eraseRight = function(x, y) {
3027   var line = this.lines.get(this.ybase + y)
3028   , ch = [this.eraseAttr(), ' ', 1]; // xterm
3029
3030
3031   for (; x < this.cols; x++) {
3032     line[x] = ch;
3033   }
3034
3035   this.updateRange(y);
3036 };
3037
3038
3039
3040 /**
3041  * Erase in the identified line everything from "x" to the start of the line (left).
3042  * @param {number} x The column from which to start erasing to the start of the line.
3043  * @param {number} y The line in which to operate.
3044  */
3045 Terminal.prototype.eraseLeft = function(x, y) {
3046   var line = this.lines.get(this.ybase + y)
3047   , ch = [this.eraseAttr(), ' ', 1]; // xterm
3048
3049   x++;
3050   while (x--) line[x] = ch;
3051
3052   this.updateRange(y);
3053 };
3054
3055 /**
3056  * Clears the entire buffer, making the prompt line the new first line.
3057  */
3058 Terminal.prototype.clear = function() {
3059   if (this.ybase === 0 && this.y === 0) {
3060     // Don't clear if it's already clear
3061     return;
3062   }
3063   this.lines.set(0, this.lines.get(this.ybase + this.y));
3064   this.lines.length = 1;
3065   this.ydisp = 0;
3066   this.ybase = 0;
3067   this.y = 0;
3068   for (var i = 1; i < this.rows; i++) {
3069     this.lines.push(this.blankLine());
3070   }
3071   this.refresh(0, this.rows - 1);
3072   this.emit('scroll', this.ydisp);
3073 };
3074
3075 /**
3076  * Erase all content in the given line
3077  * @param {number} y The line to erase all of its contents.
3078  */
3079 Terminal.prototype.eraseLine = function(y) {
3080   this.eraseRight(0, y);
3081 };
3082
3083
3084 /**
3085  * Return the data array of a blank line/
3086  * @param {number} cur First bunch of data for each "blank" character.
3087  */
3088 Terminal.prototype.blankLine = function(cur) {
3089   var attr = cur
3090   ? this.eraseAttr()
3091   : this.defAttr;
3092
3093   var ch = [attr, ' ', 1]  // width defaults to 1 halfwidth character
3094   , line = []
3095   , i = 0;
3096
3097   for (; i < this.cols; i++) {
3098     line[i] = ch;
3099   }
3100
3101   return line;
3102 };
3103
3104
3105 /**
3106  * If cur return the back color xterm feature attribute. Else return defAttr.
3107  * @param {object} cur
3108  */
3109 Terminal.prototype.ch = function(cur) {
3110   return cur
3111     ? [this.eraseAttr(), ' ', 1]
3112   : [this.defAttr, ' ', 1];
3113 };
3114
3115
3116 /**
3117  * Evaluate if the current erminal is the given argument.
3118  * @param {object} term The terminal to evaluate
3119  */
3120 Terminal.prototype.is = function(term) {
3121   var name = this.termName;
3122   return (name + '').indexOf(term) === 0;
3123 };
3124
3125
3126 /**
3127  * Emit the 'data' event and populate the given data.
3128  * @param {string} data The data to populate in the event.
3129  */
3130 Terminal.prototype.handler = function(data) {
3131   // Input is being sent to the terminal, the terminal should focus the prompt.
3132   if (this.ybase !== this.ydisp) {
3133     this.scrollToBottom();
3134   }
3135   this.emit('data', data);
3136 };
3137
3138
3139 /**
3140  * Emit the 'title' event and populate the given title.
3141  * @param {string} title The title to populate in the event.
3142  */
3143 Terminal.prototype.handleTitle = function(title) {
3144   /**
3145    * This event is emitted when the title of the terminal is changed
3146    * from inside the terminal. The parameter is the new title.
3147    *
3148    * @event title
3149    */
3150   this.emit('title', title);
3151 };
3152
3153
3154 /**
3155  * ESC
3156  */
3157
3158 /**
3159  * ESC D Index (IND is 0x84).
3160  */
3161 Terminal.prototype.index = function() {
3162   this.y++;
3163   if (this.y > this.scrollBottom) {
3164     this.y--;
3165     this.scroll();
3166   }
3167   this.state = normal;
3168 };
3169
3170
3171 /**
3172  * ESC M Reverse Index (RI is 0x8d).
3173  */
3174 Terminal.prototype.reverseIndex = function() {
3175   var j;
3176   this.y--;
3177   if (this.y < this.scrollTop) {
3178     this.y++;
3179     // possibly move the code below to term.reverseScroll();
3180     // test: echo -ne '\e[1;1H\e[44m\eM\e[0m'
3181     // blankLine(true) is xterm/linux behavior
3182     this.lines.splice(this.y + this.ybase, 0, this.blankLine(true));
3183     j = this.rows - 1 - this.scrollBottom;
3184     this.lines.splice(this.rows - 1 + this.ybase - j + 1, 1);
3185     // this.maxRange();
3186     this.updateRange(this.scrollTop);
3187     this.updateRange(this.scrollBottom);
3188   }
3189   this.state = normal;
3190 };
3191
3192
3193 /**
3194  * ESC c Full Reset (RIS).
3195  */
3196 Terminal.prototype.reset = function() {
3197   this.options.rows = this.rows;
3198   this.options.cols = this.cols;
3199   var customKeydownHandler = this.customKeydownHandler;
3200   Terminal.call(this, this.options);
3201   this.customKeydownHandler = customKeydownHandler;
3202   this.refresh(0, this.rows - 1);
3203   this.viewport.syncScrollArea();
3204 };
3205
3206
3207 /**
3208  * ESC H Tab Set (HTS is 0x88).
3209  */
3210 Terminal.prototype.tabSet = function() {
3211   this.tabs[this.x] = true;
3212   this.state = normal;
3213 };
3214
3215
3216 /**
3217  * CSI
3218  */
3219
3220 /**
3221  * CSI Ps A
3222  * Cursor Up Ps Times (default = 1) (CUU).
3223  */
3224 Terminal.prototype.cursorUp = function(params) {
3225   var param = params[0];
3226   if (param < 1) param = 1;
3227   this.y -= param;
3228   if (this.y < 0) this.y = 0;
3229 };
3230
3231
3232 /**
3233  * CSI Ps B
3234  * Cursor Down Ps Times (default = 1) (CUD).
3235  */
3236 Terminal.prototype.cursorDown = function(params) {
3237   var param = params[0];
3238   if (param < 1) param = 1;
3239   this.y += param;
3240   if (this.y >= this.rows) {
3241     this.y = this.rows - 1;
3242   }
3243 };
3244
3245
3246 /**
3247  * CSI Ps C
3248  * Cursor Forward Ps Times (default = 1) (CUF).
3249  */
3250 Terminal.prototype.cursorForward = function(params) {
3251   var param = params[0];
3252   if (param < 1) param = 1;
3253   this.x += param;
3254   if (this.x >= this.cols) {
3255     this.x = this.cols - 1;
3256   }
3257 };
3258
3259
3260 /**
3261  * CSI Ps D
3262  * Cursor Backward Ps Times (default = 1) (CUB).
3263  */
3264 Terminal.prototype.cursorBackward = function(params) {
3265   var param = params[0];
3266   if (param < 1) param = 1;
3267   this.x -= param;
3268   if (this.x < 0) this.x = 0;
3269 };
3270
3271
3272 /**
3273  * CSI Ps ; Ps H
3274  * Cursor Position [row;column] (default = [1,1]) (CUP).
3275  */
3276 Terminal.prototype.cursorPos = function(params) {
3277   var row, col;
3278
3279   row = params[0] - 1;
3280
3281   if (params.length >= 2) {
3282     col = params[1] - 1;
3283   } else {
3284     col = 0;
3285   }
3286
3287   if (row < 0) {
3288     row = 0;
3289   } else if (row >= this.rows) {
3290     row = this.rows - 1;
3291   }
3292
3293   if (col < 0) {
3294     col = 0;
3295   } else if (col >= this.cols) {
3296     col = this.cols - 1;
3297   }
3298
3299   this.x = col;
3300   this.y = row;
3301 };
3302
3303
3304 /**
3305  * CSI Ps J  Erase in Display (ED).
3306  *     Ps = 0  -> Erase Below (default).
3307  *     Ps = 1  -> Erase Above.
3308  *     Ps = 2  -> Erase All.
3309  *     Ps = 3  -> Erase Saved Lines (xterm).
3310  * CSI ? Ps J
3311  *   Erase in Display (DECSED).
3312  *     Ps = 0  -> Selective Erase Below (default).
3313  *     Ps = 1  -> Selective Erase Above.
3314  *     Ps = 2  -> Selective Erase All.
3315  */
3316 Terminal.prototype.eraseInDisplay = function(params) {
3317   var j;
3318   switch (params[0]) {
3319     case 0:
3320       this.eraseRight(this.x, this.y);
3321       j = this.y + 1;
3322       for (; j < this.rows; j++) {
3323         this.eraseLine(j);
3324       }
3325       break;
3326     case 1:
3327       this.eraseLeft(this.x, this.y);
3328       j = this.y;
3329       while (j--) {
3330         this.eraseLine(j);
3331       }
3332       break;
3333     case 2:
3334       j = this.rows;
3335       while (j--) this.eraseLine(j);
3336       break;
3337     case 3:
3338       ; // no saved lines
3339       break;
3340   }
3341 };
3342
3343
3344 /**
3345  * CSI Ps K  Erase in Line (EL).
3346  *     Ps = 0  -> Erase to Right (default).
3347  *     Ps = 1  -> Erase to Left.
3348  *     Ps = 2  -> Erase All.
3349  * CSI ? Ps K
3350  *   Erase in Line (DECSEL).
3351  *     Ps = 0  -> Selective Erase to Right (default).
3352  *     Ps = 1  -> Selective Erase to Left.
3353  *     Ps = 2  -> Selective Erase All.
3354  */
3355 Terminal.prototype.eraseInLine = function(params) {
3356   switch (params[0]) {
3357     case 0:
3358       this.eraseRight(this.x, this.y);
3359       break;
3360     case 1:
3361       this.eraseLeft(this.x, this.y);
3362       break;
3363     case 2:
3364       this.eraseLine(this.y);
3365       break;
3366   }
3367 };
3368
3369
3370 /**
3371  * CSI Pm m  Character Attributes (SGR).
3372  *     Ps = 0  -> Normal (default).
3373  *     Ps = 1  -> Bold.
3374  *     Ps = 4  -> Underlined.
3375  *     Ps = 5  -> Blink (appears as Bold).
3376  *     Ps = 7  -> Inverse.
3377  *     Ps = 8  -> Invisible, i.e., hidden (VT300).
3378  *     Ps = 2 2  -> Normal (neither bold nor faint).
3379  *     Ps = 2 4  -> Not underlined.
3380  *     Ps = 2 5  -> Steady (not blinking).
3381  *     Ps = 2 7  -> Positive (not inverse).
3382  *     Ps = 2 8  -> Visible, i.e., not hidden (VT300).
3383  *     Ps = 3 0  -> Set foreground color to Black.
3384  *     Ps = 3 1  -> Set foreground color to Red.
3385  *     Ps = 3 2  -> Set foreground color to Green.
3386  *     Ps = 3 3  -> Set foreground color to Yellow.
3387  *     Ps = 3 4  -> Set foreground color to Blue.
3388  *     Ps = 3 5  -> Set foreground color to Magenta.
3389  *     Ps = 3 6  -> Set foreground color to Cyan.
3390  *     Ps = 3 7  -> Set foreground color to White.
3391  *     Ps = 3 9  -> Set foreground color to default (original).
3392  *     Ps = 4 0  -> Set background color to Black.
3393  *     Ps = 4 1  -> Set background color to Red.
3394  *     Ps = 4 2  -> Set background color to Green.
3395  *     Ps = 4 3  -> Set background color to Yellow.
3396  *     Ps = 4 4  -> Set background color to Blue.
3397  *     Ps = 4 5  -> Set background color to Magenta.
3398  *     Ps = 4 6  -> Set background color to Cyan.
3399  *     Ps = 4 7  -> Set background color to White.
3400  *     Ps = 4 9  -> Set background color to default (original).
3401  *
3402  *   If 16-color support is compiled, the following apply.  Assume
3403  *   that xterm's resources are set so that the ISO color codes are
3404  *   the first 8 of a set of 16.  Then the aixterm colors are the
3405  *   bright versions of the ISO colors:
3406  *     Ps = 9 0  -> Set foreground color to Black.
3407  *     Ps = 9 1  -> Set foreground color to Red.
3408  *     Ps = 9 2  -> Set foreground color to Green.
3409  *     Ps = 9 3  -> Set foreground color to Yellow.
3410  *     Ps = 9 4  -> Set foreground color to Blue.
3411  *     Ps = 9 5  -> Set foreground color to Magenta.
3412  *     Ps = 9 6  -> Set foreground color to Cyan.
3413  *     Ps = 9 7  -> Set foreground color to White.
3414  *     Ps = 1 0 0  -> Set background color to Black.
3415  *     Ps = 1 0 1  -> Set background color to Red.
3416  *     Ps = 1 0 2  -> Set background color to Green.
3417  *     Ps = 1 0 3  -> Set background color to Yellow.
3418  *     Ps = 1 0 4  -> Set background color to Blue.
3419  *     Ps = 1 0 5  -> Set background color to Magenta.
3420  *     Ps = 1 0 6  -> Set background color to Cyan.
3421  *     Ps = 1 0 7  -> Set background color to White.
3422  *
3423  *   If xterm is compiled with the 16-color support disabled, it
3424  *   supports the following, from rxvt:
3425  *     Ps = 1 0 0  -> Set foreground and background color to
3426  *     default.
3427  *
3428  *   If 88- or 256-color support is compiled, the following apply.
3429  *     Ps = 3 8  ; 5  ; Ps -> Set foreground color to the second
3430  *     Ps.
3431  *     Ps = 4 8  ; 5  ; Ps -> Set background color to the second
3432  *     Ps.
3433  */
3434 Terminal.prototype.charAttributes = function(params) {
3435   // Optimize a single SGR0.
3436   if (params.length === 1 && params[0] === 0) {
3437     this.curAttr = this.defAttr;
3438     return;
3439   }
3440
3441   var l = params.length
3442   , i = 0
3443   , flags = this.curAttr >> 18
3444   , fg = (this.curAttr >> 9) & 0x1ff
3445   , bg = this.curAttr & 0x1ff
3446   , p;
3447
3448   for (; i < l; i++) {
3449     p = params[i];
3450     if (p >= 30 && p <= 37) {
3451       // fg color 8
3452       fg = p - 30;
3453     } else if (p >= 40 && p <= 47) {
3454       // bg color 8
3455       bg = p - 40;
3456     } else if (p >= 90 && p <= 97) {
3457       // fg color 16
3458       p += 8;
3459       fg = p - 90;
3460     } else if (p >= 100 && p <= 107) {
3461       // bg color 16
3462       p += 8;
3463       bg = p - 100;
3464     } else if (p === 0) {
3465       // default
3466       flags = this.defAttr >> 18;
3467       fg = (this.defAttr >> 9) & 0x1ff;
3468       bg = this.defAttr & 0x1ff;
3469       // flags = 0;
3470       // fg = 0x1ff;
3471       // bg = 0x1ff;
3472     } else if (p === 1) {
3473       // bold text
3474       flags |= 1;
3475     } else if (p === 4) {
3476       // underlined text
3477       flags |= 2;
3478     } else if (p === 5) {
3479       // blink
3480       flags |= 4;
3481     } else if (p === 7) {
3482       // inverse and positive
3483       // test with: echo -e '\e[31m\e[42mhello\e[7mworld\e[27mhi\e[m'
3484       flags |= 8;
3485     } else if (p === 8) {
3486       // invisible
3487       flags |= 16;
3488     } else if (p === 22) {
3489       // not bold
3490       flags &= ~1;
3491     } else if (p === 24) {
3492       // not underlined
3493       flags &= ~2;
3494     } else if (p === 25) {
3495       // not blink
3496       flags &= ~4;
3497     } else if (p === 27) {
3498       // not inverse
3499       flags &= ~8;
3500     } else if (p === 28) {
3501       // not invisible
3502       flags &= ~16;
3503     } else if (p === 39) {
3504       // reset fg
3505       fg = (this.defAttr >> 9) & 0x1ff;
3506     } else if (p === 49) {
3507       // reset bg
3508       bg = this.defAttr & 0x1ff;
3509     } else if (p === 38) {
3510       // fg color 256
3511       if (params[i + 1] === 2) {
3512         i += 2;
3513         fg = matchColor(
3514           params[i] & 0xff,
3515           params[i + 1] & 0xff,
3516           params[i + 2] & 0xff);
3517         if (fg === -1) fg = 0x1ff;
3518         i += 2;
3519       } else if (params[i + 1] === 5) {
3520         i += 2;
3521         p = params[i] & 0xff;
3522         fg = p;
3523       }
3524     } else if (p === 48) {
3525       // bg color 256
3526       if (params[i + 1] === 2) {
3527         i += 2;
3528         bg = matchColor(
3529           params[i] & 0xff,
3530           params[i + 1] & 0xff,
3531           params[i + 2] & 0xff);
3532         if (bg === -1) bg = 0x1ff;
3533         i += 2;
3534       } else if (params[i + 1] === 5) {
3535         i += 2;
3536         p = params[i] & 0xff;
3537         bg = p;
3538       }
3539     } else if (p === 100) {
3540       // reset fg/bg
3541       fg = (this.defAttr >> 9) & 0x1ff;
3542       bg = this.defAttr & 0x1ff;
3543     } else {
3544       this.error('Unknown SGR attribute: %d.', p);
3545     }
3546   }
3547
3548   this.curAttr = (flags << 18) | (fg << 9) | bg;
3549 };
3550
3551
3552 /**
3553  * CSI Ps n  Device Status Report (DSR).
3554  *     Ps = 5  -> Status Report.  Result (``OK'') is
3555  *   CSI 0 n
3556  *     Ps = 6  -> Report Cursor Position (CPR) [row;column].
3557  *   Result is
3558  *   CSI r ; c R
3559  * CSI ? Ps n
3560  *   Device Status Report (DSR, DEC-specific).
3561  *     Ps = 6  -> Report Cursor Position (CPR) [row;column] as CSI
3562  *     ? r ; c R (assumes page is zero).
3563  *     Ps = 1 5  -> Report Printer status as CSI ? 1 0  n  (ready).
3564  *     or CSI ? 1 1  n  (not ready).
3565  *     Ps = 2 5  -> Report UDK status as CSI ? 2 0  n  (unlocked)
3566  *     or CSI ? 2 1  n  (locked).
3567  *     Ps = 2 6  -> Report Keyboard status as
3568  *   CSI ? 2 7  ;  1  ;  0  ;  0  n  (North American).
3569  *   The last two parameters apply to VT400 & up, and denote key-
3570  *   board ready and LK01 respectively.
3571  *     Ps = 5 3  -> Report Locator status as
3572  *   CSI ? 5 3  n  Locator available, if compiled-in, or
3573  *   CSI ? 5 0  n  No Locator, if not.
3574  */
3575 Terminal.prototype.deviceStatus = function(params) {
3576   if (!this.prefix) {
3577     switch (params[0]) {
3578       case 5:
3579         // status report
3580         this.send('\x1b[0n');
3581         break;
3582       case 6:
3583         // cursor position
3584         this.send('\x1b['
3585                   + (this.y + 1)
3586                   + ';'
3587                   + (this.x + 1)
3588                   + 'R');
3589         break;
3590     }
3591   } else if (this.prefix === '?') {
3592     // modern xterm doesnt seem to
3593     // respond to any of these except ?6, 6, and 5
3594     switch (params[0]) {
3595       case 6:
3596         // cursor position
3597         this.send('\x1b[?'
3598                   + (this.y + 1)
3599                   + ';'
3600                   + (this.x + 1)
3601                   + 'R');
3602         break;
3603       case 15:
3604         // no printer
3605         // this.send('\x1b[?11n');
3606         break;
3607       case 25:
3608         // dont support user defined keys
3609         // this.send('\x1b[?21n');
3610         break;
3611       case 26:
3612         // north american keyboard
3613         // this.send('\x1b[?27;1;0;0n');
3614         break;
3615       case 53:
3616         // no dec locator/mouse
3617         // this.send('\x1b[?50n');
3618         break;
3619     }
3620   }
3621 };
3622
3623
3624 /**
3625  * Additions
3626  */
3627
3628 /**
3629  * CSI Ps @
3630  * Insert Ps (Blank) Character(s) (default = 1) (ICH).
3631  */
3632 Terminal.prototype.insertChars = function(params) {
3633   var param, row, j, ch;
3634
3635   param = params[0];
3636   if (param < 1) param = 1;
3637
3638   row = this.y + this.ybase;
3639   j = this.x;
3640   ch = [this.eraseAttr(), ' ', 1]; // xterm
3641
3642   while (param-- && j < this.cols) {
3643     this.lines.get(row).splice(j++, 0, ch);
3644     this.lines.get(row).pop();
3645   }
3646 };
3647
3648 /**
3649  * CSI Ps E
3650  * Cursor Next Line Ps Times (default = 1) (CNL).
3651  * same as CSI Ps B ?
3652  */
3653 Terminal.prototype.cursorNextLine = function(params) {
3654   var param = params[0];
3655   if (param < 1) param = 1;
3656   this.y += param;
3657   if (this.y >= this.rows) {
3658     this.y = this.rows - 1;
3659   }
3660   this.x = 0;
3661 };
3662
3663
3664 /**
3665  * CSI Ps F
3666  * Cursor Preceding Line Ps Times (default = 1) (CNL).
3667  * reuse CSI Ps A ?
3668  */
3669 Terminal.prototype.cursorPrecedingLine = function(params) {
3670   var param = params[0];
3671   if (param < 1) param = 1;
3672   this.y -= param;
3673   if (this.y < 0) this.y = 0;
3674   this.x = 0;
3675 };
3676
3677
3678 /**
3679  * CSI Ps G
3680  * Cursor Character Absolute  [column] (default = [row,1]) (CHA).
3681  */
3682 Terminal.prototype.cursorCharAbsolute = function(params) {
3683   var param = params[0];
3684   if (param < 1) param = 1;
3685   this.x = param - 1;
3686 };
3687
3688
3689 /**
3690  * CSI Ps L
3691  * Insert Ps Line(s) (default = 1) (IL).
3692  */
3693 Terminal.prototype.insertLines = function(params) {
3694   var param, row, j;
3695
3696   param = params[0];
3697   if (param < 1) param = 1;
3698   row = this.y + this.ybase;
3699
3700   j = this.rows - 1 - this.scrollBottom;
3701   j = this.rows - 1 + this.ybase - j + 1;
3702
3703   while (param--) {
3704     // test: echo -e '\e[44m\e[1L\e[0m'
3705     // blankLine(true) - xterm/linux behavior
3706     this.lines.splice(row, 0, this.blankLine(true));
3707     this.lines.splice(j, 1);
3708   }
3709
3710   // this.maxRange();
3711   this.updateRange(this.y);
3712   this.updateRange(this.scrollBottom);
3713 };
3714
3715
3716 /**
3717  * CSI Ps M
3718  * Delete Ps Line(s) (default = 1) (DL).
3719  */
3720 Terminal.prototype.deleteLines = function(params) {
3721   var param, row, j;
3722
3723   param = params[0];
3724   if (param < 1) param = 1;
3725   row = this.y + this.ybase;
3726
3727   j = this.rows - 1 - this.scrollBottom;
3728   j = this.rows - 1 + this.ybase - j;
3729
3730   while (param--) {
3731     // test: echo -e '\e[44m\e[1M\e[0m'
3732     // blankLine(true) - xterm/linux behavior
3733     this.lines.splice(j + 1, 0, this.blankLine(true));
3734     this.lines.splice(row, 1);
3735   }
3736
3737   // this.maxRange();
3738   this.updateRange(this.y);
3739   this.updateRange(this.scrollBottom);
3740 };
3741
3742
3743 /**
3744  * CSI Ps P
3745  * Delete Ps Character(s) (default = 1) (DCH).
3746  */
3747 Terminal.prototype.deleteChars = function(params) {
3748   var param, row, ch;
3749
3750   param = params[0];
3751   if (param < 1) param = 1;
3752
3753   row = this.y + this.ybase;
3754   ch = [this.eraseAttr(), ' ', 1]; // xterm
3755
3756   while (param--) {
3757     this.lines[row].splice(this.x, 1);
3758     this.lines[row].push(ch);
3759   }
3760 };
3761
3762 /**
3763  * CSI Ps X
3764  * Erase Ps Character(s) (default = 1) (ECH).
3765  */
3766 Terminal.prototype.eraseChars = function(params) {
3767   var param, row, j, ch;
3768
3769   param = params[0];
3770   if (param < 1) param = 1;
3771
3772   row = this.y + this.ybase;
3773   j = this.x;
3774   ch = [this.eraseAttr(), ' ', 1]; // xterm
3775
3776   while (param-- && j < this.cols) {
3777     this.lines.get(row)[j++] = ch;
3778   }
3779 };
3780
3781 /**
3782  * CSI Pm `  Character Position Absolute
3783  *   [column] (default = [row,1]) (HPA).
3784  */
3785 Terminal.prototype.charPosAbsolute = function(params) {
3786   var param = params[0];
3787   if (param < 1) param = 1;
3788   this.x = param - 1;
3789   if (this.x >= this.cols) {
3790     this.x = this.cols - 1;
3791   }
3792 };
3793
3794
3795 /**
3796  * 141 61 a * HPR -
3797  * Horizontal Position Relative
3798  * reuse CSI Ps C ?
3799  */
3800 Terminal.prototype.HPositionRelative = function(params) {
3801   var param = params[0];
3802   if (param < 1) param = 1;
3803   this.x += param;
3804   if (this.x >= this.cols) {
3805     this.x = this.cols - 1;
3806   }
3807 };
3808
3809
3810 /**
3811  * CSI Ps c  Send Device Attributes (Primary DA).
3812  *     Ps = 0  or omitted -> request attributes from terminal.  The
3813  *     response depends on the decTerminalID resource setting.
3814  *     -> CSI ? 1 ; 2 c  (``VT100 with Advanced Video Option'')
3815  *     -> CSI ? 1 ; 0 c  (``VT101 with No Options'')
3816  *     -> CSI ? 6 c  (``VT102'')
3817  *     -> CSI ? 6 0 ; 1 ; 2 ; 6 ; 8 ; 9 ; 1 5 ; c  (``VT220'')
3818  *   The VT100-style response parameters do not mean anything by
3819  *   themselves.  VT220 parameters do, telling the host what fea-
3820  *   tures the terminal supports:
3821  *     Ps = 1  -> 132-columns.
3822  *     Ps = 2  -> Printer.
3823  *     Ps = 6  -> Selective erase.
3824  *     Ps = 8  -> User-defined keys.
3825  *     Ps = 9  -> National replacement character sets.
3826  *     Ps = 1 5  -> Technical characters.
3827  *     Ps = 2 2  -> ANSI color, e.g., VT525.
3828  *     Ps = 2 9  -> ANSI text locator (i.e., DEC Locator mode).
3829  * CSI > Ps c
3830  *   Send Device Attributes (Secondary DA).
3831  *     Ps = 0  or omitted -> request the terminal's identification
3832  *     code.  The response depends on the decTerminalID resource set-
3833  *     ting.  It should apply only to VT220 and up, but xterm extends
3834  *     this to VT100.
3835  *     -> CSI  > Pp ; Pv ; Pc c
3836  *   where Pp denotes the terminal type
3837  *     Pp = 0  -> ``VT100''.
3838  *     Pp = 1  -> ``VT220''.
3839  *   and Pv is the firmware version (for xterm, this was originally
3840  *   the XFree86 patch number, starting with 95).  In a DEC termi-
3841  *   nal, Pc indicates the ROM cartridge registration number and is
3842  *   always zero.
3843  * More information:
3844  *   xterm/charproc.c - line 2012, for more information.
3845  *   vim responds with ^[[?0c or ^[[?1c after the terminal's response (?)
3846  */
3847 Terminal.prototype.sendDeviceAttributes = function(params) {
3848   if (params[0] > 0) return;
3849
3850   if (!this.prefix) {
3851     if (this.is('xterm')
3852         || this.is('rxvt-unicode')
3853         || this.is('screen')) {
3854       this.send('\x1b[?1;2c');
3855     } else if (this.is('linux')) {
3856       this.send('\x1b[?6c');
3857     }
3858   } else if (this.prefix === '>') {
3859     // xterm and urxvt
3860     // seem to spit this
3861     // out around ~370 times (?).
3862     if (this.is('xterm')) {
3863       this.send('\x1b[>0;276;0c');
3864     } else if (this.is('rxvt-unicode')) {
3865       this.send('\x1b[>85;95;0c');
3866     } else if (this.is('linux')) {
3867       // not supported by linux console.
3868       // linux console echoes parameters.
3869       this.send(params[0] + 'c');
3870     } else if (this.is('screen')) {
3871       this.send('\x1b[>83;40003;0c');
3872     }
3873   }
3874 };
3875
3876
3877 /**
3878  * CSI Pm d
3879  * Line Position Absolute  [row] (default = [1,column]) (VPA).
3880  */
3881 Terminal.prototype.linePosAbsolute = function(params) {
3882   var param = params[0];
3883   if (param < 1) param = 1;
3884   this.y = param - 1;
3885   if (this.y >= this.rows) {
3886     this.y = this.rows - 1;
3887   }
3888 };
3889
3890
3891 /**
3892  * 145 65 e * VPR - Vertical Position Relative
3893  * reuse CSI Ps B ?
3894  */
3895 Terminal.prototype.VPositionRelative = function(params) {
3896   var param = params[0];
3897   if (param < 1) param = 1;
3898   this.y += param;
3899   if (this.y >= this.rows) {
3900     this.y = this.rows - 1;
3901   }
3902 };
3903
3904
3905 /**
3906  * CSI Ps ; Ps f
3907  *   Horizontal and Vertical Position [row;column] (default =
3908  *   [1,1]) (HVP).
3909  */
3910 Terminal.prototype.HVPosition = function(params) {
3911   if (params[0] < 1) params[0] = 1;
3912   if (params[1] < 1) params[1] = 1;
3913
3914   this.y = params[0] - 1;
3915   if (this.y >= this.rows) {
3916     this.y = this.rows - 1;
3917   }
3918
3919   this.x = params[1] - 1;
3920   if (this.x >= this.cols) {
3921     this.x = this.cols - 1;
3922   }
3923 };
3924
3925
3926 /**
3927  * CSI Pm h  Set Mode (SM).
3928  *     Ps = 2  -> Keyboard Action Mode (AM).
3929  *     Ps = 4  -> Insert Mode (IRM).
3930  *     Ps = 1 2  -> Send/receive (SRM).
3931  *     Ps = 2 0  -> Automatic Newline (LNM).
3932  * CSI ? Pm h
3933  *   DEC Private Mode Set (DECSET).
3934  *     Ps = 1  -> Application Cursor Keys (DECCKM).
3935  *     Ps = 2  -> Designate USASCII for character sets G0-G3
3936  *     (DECANM), and set VT100 mode.
3937  *     Ps = 3  -> 132 Column Mode (DECCOLM).
3938  *     Ps = 4  -> Smooth (Slow) Scroll (DECSCLM).
3939  *     Ps = 5  -> Reverse Video (DECSCNM).
3940  *     Ps = 6  -> Origin Mode (DECOM).
3941  *     Ps = 7  -> Wraparound Mode (DECAWM).
3942  *     Ps = 8  -> Auto-repeat Keys (DECARM).
3943  *     Ps = 9  -> Send Mouse X & Y on button press.  See the sec-
3944  *     tion Mouse Tracking.
3945  *     Ps = 1 0  -> Show toolbar (rxvt).
3946  *     Ps = 1 2  -> Start Blinking Cursor (att610).
3947  *     Ps = 1 8  -> Print form feed (DECPFF).
3948  *     Ps = 1 9  -> Set print extent to full screen (DECPEX).
3949  *     Ps = 2 5  -> Show Cursor (DECTCEM).
3950  *     Ps = 3 0  -> Show scrollbar (rxvt).
3951  *     Ps = 3 5  -> Enable font-shifting functions (rxvt).
3952  *     Ps = 3 8  -> Enter Tektronix Mode (DECTEK).
3953  *     Ps = 4 0  -> Allow 80 -> 132 Mode.
3954  *     Ps = 4 1  -> more(1) fix (see curses resource).
3955  *     Ps = 4 2  -> Enable Nation Replacement Character sets (DECN-
3956  *     RCM).
3957  *     Ps = 4 4  -> Turn On Margin Bell.
3958  *     Ps = 4 5  -> Reverse-wraparound Mode.
3959  *     Ps = 4 6  -> Start Logging.  This is normally disabled by a
3960  *     compile-time option.
3961  *     Ps = 4 7  -> Use Alternate Screen Buffer.  (This may be dis-
3962  *     abled by the titeInhibit resource).
3963  *     Ps = 6 6  -> Application keypad (DECNKM).
3964  *     Ps = 6 7  -> Backarrow key sends backspace (DECBKM).
3965  *     Ps = 1 0 0 0  -> Send Mouse X & Y on button press and
3966  *     release.  See the section Mouse Tracking.
3967  *     Ps = 1 0 0 1  -> Use Hilite Mouse Tracking.
3968  *     Ps = 1 0 0 2  -> Use Cell Motion Mouse Tracking.
3969  *     Ps = 1 0 0 3  -> Use All Motion Mouse Tracking.
3970  *     Ps = 1 0 0 4  -> Send FocusIn/FocusOut events.
3971  *     Ps = 1 0 0 5  -> Enable Extended Mouse Mode.
3972  *     Ps = 1 0 1 0  -> Scroll to bottom on tty output (rxvt).
3973  *     Ps = 1 0 1 1  -> Scroll to bottom on key press (rxvt).
3974  *     Ps = 1 0 3 4  -> Interpret "meta" key, sets eighth bit.
3975  *     (enables the eightBitInput resource).
3976  *     Ps = 1 0 3 5  -> Enable special modifiers for Alt and Num-
3977  *     Lock keys.  (This enables the numLock resource).
3978  *     Ps = 1 0 3 6  -> Send ESC   when Meta modifies a key.  (This
3979  *     enables the metaSendsEscape resource).
3980  *     Ps = 1 0 3 7  -> Send DEL from the editing-keypad Delete
3981  *     key.
3982  *     Ps = 1 0 3 9  -> Send ESC  when Alt modifies a key.  (This
3983  *     enables the altSendsEscape resource).
3984  *     Ps = 1 0 4 0  -> Keep selection even if not highlighted.
3985  *     (This enables the keepSelection resource).
3986  *     Ps = 1 0 4 1  -> Use the CLIPBOARD selection.  (This enables
3987  *     the selectToClipboard resource).
3988  *     Ps = 1 0 4 2  -> Enable Urgency window manager hint when
3989  *     Control-G is received.  (This enables the bellIsUrgent
3990  *     resource).
3991  *     Ps = 1 0 4 3  -> Enable raising of the window when Control-G
3992  *     is received.  (enables the popOnBell resource).
3993  *     Ps = 1 0 4 7  -> Use Alternate Screen Buffer.  (This may be
3994  *     disabled by the titeInhibit resource).
3995  *     Ps = 1 0 4 8  -> Save cursor as in DECSC.  (This may be dis-
3996  *     abled by the titeInhibit resource).
3997  *     Ps = 1 0 4 9  -> Save cursor as in DECSC and use Alternate
3998  *     Screen Buffer, clearing it first.  (This may be disabled by
3999  *     the titeInhibit resource).  This combines the effects of the 1
4000  *     0 4 7  and 1 0 4 8  modes.  Use this with terminfo-based
4001  *     applications rather than the 4 7  mode.
4002  *     Ps = 1 0 5 0  -> Set terminfo/termcap function-key mode.
4003  *     Ps = 1 0 5 1  -> Set Sun function-key mode.
4004  *     Ps = 1 0 5 2  -> Set HP function-key mode.
4005  *     Ps = 1 0 5 3  -> Set SCO function-key mode.
4006  *     Ps = 1 0 6 0  -> Set legacy keyboard emulation (X11R6).
4007  *     Ps = 1 0 6 1  -> Set VT220 keyboard emulation.
4008  *     Ps = 2 0 0 4  -> Set bracketed paste mode.
4009  * Modes:
4010  *   http: *vt100.net/docs/vt220-rm/chapter4.html
4011  */
4012 Terminal.prototype.setMode = function(params) {
4013   if (typeof params === 'object') {
4014     var l = params.length
4015     , i = 0;
4016
4017     for (; i < l; i++) {
4018       this.setMode(params[i]);
4019     }
4020
4021     return;
4022   }
4023
4024   if (!this.prefix) {
4025     switch (params) {
4026       case 4:
4027         this.insertMode = true;
4028         break;
4029       case 20:
4030         //this.convertEol = true;
4031         break;
4032     }
4033   } else if (this.prefix === '?') {
4034     switch (params) {
4035       case 1:
4036         this.applicationCursor = true;
4037         break;
4038       case 2:
4039         this.setgCharset(0, Terminal.charsets.US);
4040         this.setgCharset(1, Terminal.charsets.US);
4041         this.setgCharset(2, Terminal.charsets.US);
4042         this.setgCharset(3, Terminal.charsets.US);
4043         // set VT100 mode here
4044         break;
4045       case 3: // 132 col mode
4046         this.savedCols = this.cols;
4047         this.resize(132, this.rows);
4048         break;
4049       case 6:
4050         this.originMode = true;
4051         break;
4052       case 7:
4053         this.wraparoundMode = true;
4054         break;
4055       case 12:
4056         // this.cursorBlink = true;
4057         break;
4058       case 66:
4059         this.log('Serial port requested application keypad.');
4060         this.applicationKeypad = true;
4061         this.viewport.syncScrollArea();
4062         break;
4063       case 9: // X10 Mouse
4064         // no release, no motion, no wheel, no modifiers.
4065       case 1000: // vt200 mouse
4066         // no motion.
4067         // no modifiers, except control on the wheel.
4068       case 1002: // button event mouse
4069       case 1003: // any event mouse
4070         // any event - sends motion events,
4071         // even if there is no button held down.
4072         this.x10Mouse = params === 9;
4073         this.vt200Mouse = params === 1000;
4074         this.normalMouse = params > 1000;
4075         this.mouseEvents = true;
4076         this.element.style.cursor = 'default';
4077         this.log('Binding to mouse events.');
4078         break;
4079       case 1004: // send focusin/focusout events
4080         // focusin: ^[[I
4081         // focusout: ^[[O
4082         this.sendFocus = true;
4083         break;
4084       case 1005: // utf8 ext mode mouse
4085         this.utfMouse = true;
4086         // for wide terminals
4087         // simply encodes large values as utf8 characters
4088         break;
4089       case 1006: // sgr ext mode mouse
4090         this.sgrMouse = true;
4091         // for wide terminals
4092         // does not add 32 to fields
4093         // press: ^[[<b;x;yM
4094         // release: ^[[<b;x;ym
4095         break;
4096       case 1015: // urxvt ext mode mouse
4097         this.urxvtMouse = true;
4098         // for wide terminals
4099         // numbers for fields
4100         // press: ^[[b;x;yM
4101         // motion: ^[[b;x;yT
4102         break;
4103       case 25: // show cursor
4104         this.cursorHidden = false;
4105         break;
4106       case 1049: // alt screen buffer cursor
4107         //this.saveCursor();
4108         ; // FALL-THROUGH
4109       case 47: // alt screen buffer
4110       case 1047: // alt screen buffer
4111         if (!this.normal) {
4112           var normal = {
4113             lines: this.lines,
4114             ybase: this.ybase,
4115             ydisp: this.ydisp,
4116             x: this.x,
4117             y: this.y,
4118             scrollTop: this.scrollTop,
4119             scrollBottom: this.scrollBottom,
4120             tabs: this.tabs
4121             // XXX save charset(s) here?
4122             // charset: this.charset,
4123             // glevel: this.glevel,
4124             // charsets: this.charsets
4125           };
4126           this.reset();
4127           this.normal = normal;
4128           this.showCursor();
4129         }
4130         break;
4131     }
4132   }
4133 };
4134
4135 /**
4136  * CSI Pm l  Reset Mode (RM).
4137  *     Ps = 2  -> Keyboard Action Mode (AM).
4138  *     Ps = 4  -> Replace Mode (IRM).
4139  *     Ps = 1 2  -> Send/receive (SRM).
4140  *     Ps = 2 0  -> Normal Linefeed (LNM).
4141  * CSI ? Pm l
4142  *   DEC Private Mode Reset (DECRST).
4143  *     Ps = 1  -> Normal Cursor Keys (DECCKM).
4144  *     Ps = 2  -> Designate VT52 mode (DECANM).
4145  *     Ps = 3  -> 80 Column Mode (DECCOLM).
4146  *     Ps = 4  -> Jump (Fast) Scroll (DECSCLM).
4147  *     Ps = 5  -> Normal Video (DECSCNM).
4148  *     Ps = 6  -> Normal Cursor Mode (DECOM).
4149  *     Ps = 7  -> No Wraparound Mode (DECAWM).
4150  *     Ps = 8  -> No Auto-repeat Keys (DECARM).
4151  *     Ps = 9  -> Don't send Mouse X & Y on button press.
4152  *     Ps = 1 0  -> Hide toolbar (rxvt).
4153  *     Ps = 1 2  -> Stop Blinking Cursor (att610).
4154  *     Ps = 1 8  -> Don't print form feed (DECPFF).
4155  *     Ps = 1 9  -> Limit print to scrolling region (DECPEX).
4156  *     Ps = 2 5  -> Hide Cursor (DECTCEM).
4157  *     Ps = 3 0  -> Don't show scrollbar (rxvt).
4158  *     Ps = 3 5  -> Disable font-shifting functions (rxvt).
4159  *     Ps = 4 0  -> Disallow 80 -> 132 Mode.
4160  *     Ps = 4 1  -> No more(1) fix (see curses resource).
4161  *     Ps = 4 2  -> Disable Nation Replacement Character sets (DEC-
4162  *     NRCM).
4163  *     Ps = 4 4  -> Turn Off Margin Bell.
4164  *     Ps = 4 5  -> No Reverse-wraparound Mode.
4165  *     Ps = 4 6  -> Stop Logging.  (This is normally disabled by a
4166  *     compile-time option).
4167  *     Ps = 4 7  -> Use Normal Screen Buffer.
4168  *     Ps = 6 6  -> Numeric keypad (DECNKM).
4169  *     Ps = 6 7  -> Backarrow key sends delete (DECBKM).
4170  *     Ps = 1 0 0 0  -> Don't send Mouse X & Y on button press and
4171  *     release.  See the section Mouse Tracking.
4172  *     Ps = 1 0 0 1  -> Don't use Hilite Mouse Tracking.
4173  *     Ps = 1 0 0 2  -> Don't use Cell Motion Mouse Tracking.
4174  *     Ps = 1 0 0 3  -> Don't use All Motion Mouse Tracking.
4175  *     Ps = 1 0 0 4  -> Don't send FocusIn/FocusOut events.
4176  *     Ps = 1 0 0 5  -> Disable Extended Mouse Mode.
4177  *     Ps = 1 0 1 0  -> Don't scroll to bottom on tty output
4178  *     (rxvt).
4179  *     Ps = 1 0 1 1  -> Don't scroll to bottom on key press (rxvt).
4180  *     Ps = 1 0 3 4  -> Don't interpret "meta" key.  (This disables
4181  *     the eightBitInput resource).
4182  *     Ps = 1 0 3 5  -> Disable special modifiers for Alt and Num-
4183  *     Lock keys.  (This disables the numLock resource).
4184  *     Ps = 1 0 3 6  -> Don't send ESC  when Meta modifies a key.
4185  *     (This disables the metaSendsEscape resource).
4186  *     Ps = 1 0 3 7  -> Send VT220 Remove from the editing-keypad
4187  *     Delete key.
4188  *     Ps = 1 0 3 9  -> Don't send ESC  when Alt modifies a key.
4189  *     (This disables the altSendsEscape resource).
4190  *     Ps = 1 0 4 0  -> Do not keep selection when not highlighted.
4191  *     (This disables the keepSelection resource).
4192  *     Ps = 1 0 4 1  -> Use the PRIMARY selection.  (This disables
4193  *     the selectToClipboard resource).
4194  *     Ps = 1 0 4 2  -> Disable Urgency window manager hint when
4195  *     Control-G is received.  (This disables the bellIsUrgent
4196  *     resource).
4197  *     Ps = 1 0 4 3  -> Disable raising of the window when Control-
4198  *     G is received.  (This disables the popOnBell resource).
4199  *     Ps = 1 0 4 7  -> Use Normal Screen Buffer, clearing screen
4200  *     first if in the Alternate Screen.  (This may be disabled by
4201  *     the titeInhibit resource).
4202  *     Ps = 1 0 4 8  -> Restore cursor as in DECRC.  (This may be
4203  *     disabled by the titeInhibit resource).
4204  *     Ps = 1 0 4 9  -> Use Normal Screen Buffer and restore cursor
4205  *     as in DECRC.  (This may be disabled by the titeInhibit
4206  *     resource).  This combines the effects of the 1 0 4 7  and 1 0
4207  *     4 8  modes.  Use this with terminfo-based applications rather
4208  *     than the 4 7  mode.
4209  *     Ps = 1 0 5 0  -> Reset terminfo/termcap function-key mode.
4210  *     Ps = 1 0 5 1  -> Reset Sun function-key mode.
4211  *     Ps = 1 0 5 2  -> Reset HP function-key mode.
4212  *     Ps = 1 0 5 3  -> Reset SCO function-key mode.
4213  *     Ps = 1 0 6 0  -> Reset legacy keyboard emulation (X11R6).
4214  *     Ps = 1 0 6 1  -> Reset keyboard emulation to Sun/PC style.
4215  *     Ps = 2 0 0 4  -> Reset bracketed paste mode.
4216  */
4217 Terminal.prototype.resetMode = function(params) {
4218   if (typeof params === 'object') {
4219     var l = params.length
4220     , i = 0;
4221
4222     for (; i < l; i++) {
4223       this.resetMode(params[i]);
4224     }
4225
4226     return;
4227   }
4228
4229   if (!this.prefix) {
4230     switch (params) {
4231       case 4:
4232         this.insertMode = false;
4233         break;
4234       case 20:
4235         //this.convertEol = false;
4236         break;
4237     }
4238   } else if (this.prefix === '?') {
4239     switch (params) {
4240       case 1:
4241         this.applicationCursor = false;
4242         break;
4243       case 3:
4244         if (this.cols === 132 && this.savedCols) {
4245           this.resize(this.savedCols, this.rows);
4246         }
4247         delete this.savedCols;
4248         break;
4249       case 6:
4250         this.originMode = false;
4251         break;
4252       case 7:
4253         this.wraparoundMode = false;
4254         break;
4255       case 12:
4256         // this.cursorBlink = false;
4257         break;
4258       case 66:
4259         this.log('Switching back to normal keypad.');
4260         this.applicationKeypad = false;
4261         this.viewport.syncScrollArea();
4262         break;
4263       case 9: // X10 Mouse
4264       case 1000: // vt200 mouse
4265       case 1002: // button event mouse
4266       case 1003: // any event mouse
4267         this.x10Mouse = false;
4268         this.vt200Mouse = false;
4269         this.normalMouse = false;
4270         this.mouseEvents = false;
4271         this.element.style.cursor = '';
4272         break;
4273       case 1004: // send focusin/focusout events
4274         this.sendFocus = false;
4275         break;
4276       case 1005: // utf8 ext mode mouse
4277         this.utfMouse = false;
4278         break;
4279       case 1006: // sgr ext mode mouse
4280         this.sgrMouse = false;
4281         break;
4282       case 1015: // urxvt ext mode mouse
4283         this.urxvtMouse = false;
4284         break;
4285       case 25: // hide cursor
4286         this.cursorHidden = true;
4287         break;
4288       case 1049: // alt screen buffer cursor
4289         ; // FALL-THROUGH
4290       case 47: // normal screen buffer
4291       case 1047: // normal screen buffer - clearing it first
4292         if (this.normal) {
4293           this.lines = this.normal.lines;
4294           this.ybase = this.normal.ybase;
4295           this.ydisp = this.normal.ydisp;
4296           this.x = this.normal.x;
4297           this.y = this.normal.y;
4298           this.scrollTop = this.normal.scrollTop;
4299           this.scrollBottom = this.normal.scrollBottom;
4300           this.tabs = this.normal.tabs;
4301           this.normal = null;
4302           // if (params === 1049) {
4303           //   this.x = this.savedX;
4304           //   this.y = this.savedY;
4305           // }
4306           this.refresh(0, this.rows - 1);
4307           this.showCursor();
4308         }
4309         break;
4310     }
4311   }
4312 };
4313
4314
4315 /**
4316  * CSI Ps ; Ps r
4317  *   Set Scrolling Region [top;bottom] (default = full size of win-
4318  *   dow) (DECSTBM).
4319  * CSI ? Pm r
4320  */
4321 Terminal.prototype.setScrollRegion = function(params) {
4322   if (this.prefix) return;
4323   this.scrollTop = (params[0] || 1) - 1;
4324   this.scrollBottom = (params[1] || this.rows) - 1;
4325   this.x = 0;
4326   this.y = 0;
4327 };
4328
4329
4330 /**
4331  * CSI s
4332  *   Save cursor (ANSI.SYS).
4333  */
4334 Terminal.prototype.saveCursor = function(params) {
4335   this.savedX = this.x;
4336   this.savedY = this.y;
4337 };
4338
4339
4340 /**
4341  * CSI u
4342  *   Restore cursor (ANSI.SYS).
4343  */
4344 Terminal.prototype.restoreCursor = function(params) {
4345   this.x = this.savedX || 0;
4346   this.y = this.savedY || 0;
4347 };
4348
4349
4350 /**
4351  * Lesser Used
4352  */
4353
4354 /**
4355  * CSI Ps I
4356  *   Cursor Forward Tabulation Ps tab stops (default = 1) (CHT).
4357  */
4358 Terminal.prototype.cursorForwardTab = function(params) {
4359   var param = params[0] || 1;
4360   while (param--) {
4361     this.x = this.nextStop();
4362   }
4363 };
4364
4365
4366 /**
4367  * CSI Ps S  Scroll up Ps lines (default = 1) (SU).
4368  */
4369 Terminal.prototype.scrollUp = function(params) {
4370   var param = params[0] || 1;
4371   while (param--) {
4372     this.lines.splice(this.ybase + this.scrollTop, 1);
4373     this.lines.splice(this.ybase + this.scrollBottom, 0, this.blankLine());
4374   }
4375   // this.maxRange();
4376   this.updateRange(this.scrollTop);
4377   this.updateRange(this.scrollBottom);
4378 };
4379
4380
4381 /**
4382  * CSI Ps T  Scroll down Ps lines (default = 1) (SD).
4383  */
4384 Terminal.prototype.scrollDown = function(params) {
4385   var param = params[0] || 1;
4386   while (param--) {
4387     this.lines.splice(this.ybase + this.scrollBottom, 1);
4388     this.lines.splice(this.ybase + this.scrollTop, 0, this.blankLine());
4389   }
4390   // this.maxRange();
4391   this.updateRange(this.scrollTop);
4392   this.updateRange(this.scrollBottom);
4393 };
4394
4395
4396 /**
4397  * CSI Ps ; Ps ; Ps ; Ps ; Ps T
4398  *   Initiate highlight mouse tracking.  Parameters are
4399  *   [func;startx;starty;firstrow;lastrow].  See the section Mouse
4400  *   Tracking.
4401  */
4402 Terminal.prototype.initMouseTracking = function(params) {
4403   // Relevant: DECSET 1001
4404 };
4405
4406
4407 /**
4408  * CSI > Ps; Ps T
4409  *   Reset one or more features of the title modes to the default
4410  *   value.  Normally, "reset" disables the feature.  It is possi-
4411  *   ble to disable the ability to reset features by compiling a
4412  *   different default for the title modes into xterm.
4413  *     Ps = 0  -> Do not set window/icon labels using hexadecimal.
4414  *     Ps = 1  -> Do not query window/icon labels using hexadeci-
4415  *     mal.
4416  *     Ps = 2  -> Do not set window/icon labels using UTF-8.
4417  *     Ps = 3  -> Do not query window/icon labels using UTF-8.
4418  *   (See discussion of "Title Modes").
4419  */
4420 Terminal.prototype.resetTitleModes = function(params) {
4421   ;
4422 };
4423
4424
4425 /**
4426  * CSI Ps Z  Cursor Backward Tabulation Ps tab stops (default = 1) (CBT).
4427  */
4428 Terminal.prototype.cursorBackwardTab = function(params) {
4429   var param = params[0] || 1;
4430   while (param--) {
4431     this.x = this.prevStop();
4432   }
4433 };
4434
4435
4436 /**
4437  * CSI Ps b  Repeat the preceding graphic character Ps times (REP).
4438  */
4439 Terminal.prototype.repeatPrecedingCharacter = function(params) {
4440   var param = params[0] || 1
4441   , line = this.lines.get(this.ybase + this.y)
4442   , ch = line[this.x - 1] || [this.defAttr, ' ', 1];
4443
4444   while (param--) line[this.x++] = ch;
4445 };
4446
4447
4448 /**
4449  * CSI Ps g  Tab Clear (TBC).
4450  *     Ps = 0  -> Clear Current Column (default).
4451  *     Ps = 3  -> Clear All.
4452  * Potentially:
4453  *   Ps = 2  -> Clear Stops on Line.
4454  *   http://vt100.net/annarbor/aaa-ug/section6.html
4455  */
4456 Terminal.prototype.tabClear = function(params) {
4457   var param = params[0];
4458   if (param <= 0) {
4459     delete this.tabs[this.x];
4460   } else if (param === 3) {
4461     this.tabs = {};
4462   }
4463 };
4464
4465
4466 /**
4467  * CSI Pm i  Media Copy (MC).
4468  *     Ps = 0  -> Print screen (default).
4469  *     Ps = 4  -> Turn off printer controller mode.
4470  *     Ps = 5  -> Turn on printer controller mode.
4471  * CSI ? Pm i
4472  *   Media Copy (MC, DEC-specific).
4473  *     Ps = 1  -> Print line containing cursor.
4474  *     Ps = 4  -> Turn off autoprint mode.
4475  *     Ps = 5  -> Turn on autoprint mode.
4476  *     Ps = 1  0  -> Print composed display, ignores DECPEX.
4477  *     Ps = 1  1  -> Print all pages.
4478  */
4479 Terminal.prototype.mediaCopy = function(params) {
4480   ;
4481 };
4482
4483
4484 /**
4485  * CSI > Ps; Ps m
4486  *   Set or reset resource-values used by xterm to decide whether
4487  *   to construct escape sequences holding information about the
4488  *   modifiers pressed with a given key.  The first parameter iden-
4489  *   tifies the resource to set/reset.  The second parameter is the
4490  *   value to assign to the resource.  If the second parameter is
4491  *   omitted, the resource is reset to its initial value.
4492  *     Ps = 1  -> modifyCursorKeys.
4493  *     Ps = 2  -> modifyFunctionKeys.
4494  *     Ps = 4  -> modifyOtherKeys.
4495  *   If no parameters are given, all resources are reset to their
4496  *   initial values.
4497  */
4498 Terminal.prototype.setResources = function(params) {
4499   ;
4500 };
4501
4502
4503 /**
4504  * CSI > Ps n
4505  *   Disable modifiers which may be enabled via the CSI > Ps; Ps m
4506  *   sequence.  This corresponds to a resource value of "-1", which
4507  *   cannot be set with the other sequence.  The parameter identi-
4508  *   fies the resource to be disabled:
4509  *     Ps = 1  -> modifyCursorKeys.
4510  *     Ps = 2  -> modifyFunctionKeys.
4511  *     Ps = 4  -> modifyOtherKeys.
4512  *   If the parameter is omitted, modifyFunctionKeys is disabled.
4513  *   When modifyFunctionKeys is disabled, xterm uses the modifier
4514  *   keys to make an extended sequence of functions rather than
4515  *   adding a parameter to each function key to denote the modi-
4516  *   fiers.
4517  */
4518 Terminal.prototype.disableModifiers = function(params) {
4519   ;
4520 };
4521
4522
4523 /**
4524  * CSI > Ps p
4525  *   Set resource value pointerMode.  This is used by xterm to
4526  *   decide whether to hide the pointer cursor as the user types.
4527  *   Valid values for the parameter:
4528  *     Ps = 0  -> never hide the pointer.
4529  *     Ps = 1  -> hide if the mouse tracking mode is not enabled.
4530  *     Ps = 2  -> always hide the pointer.  If no parameter is
4531  *     given, xterm uses the default, which is 1 .
4532  */
4533 Terminal.prototype.setPointerMode = function(params) {
4534   ;
4535 };
4536
4537
4538 /**
4539  * CSI ! p   Soft terminal reset (DECSTR).
4540  * http://vt100.net/docs/vt220-rm/table4-10.html
4541  */
4542 Terminal.prototype.softReset = function(params) {
4543   this.cursorHidden = false;
4544   this.insertMode = false;
4545   this.originMode = false;
4546   this.wraparoundMode = false; // autowrap
4547   this.applicationKeypad = false; // ?
4548   this.viewport.syncScrollArea();
4549   this.applicationCursor = false;
4550   this.scrollTop = 0;
4551   this.scrollBottom = this.rows - 1;
4552   this.curAttr = this.defAttr;
4553   this.x = this.y = 0; // ?
4554   this.charset = null;
4555   this.glevel = 0; // ??
4556   this.charsets = [null]; // ??
4557 };
4558
4559
4560 /**
4561  * CSI Ps$ p
4562  *   Request ANSI mode (DECRQM).  For VT300 and up, reply is
4563  *     CSI Ps; Pm$ y
4564  *   where Ps is the mode number as in RM, and Pm is the mode
4565  *   value:
4566  *     0 - not recognized
4567  *     1 - set
4568  *     2 - reset
4569  *     3 - permanently set
4570  *     4 - permanently reset
4571  */
4572 Terminal.prototype.requestAnsiMode = function(params) {
4573   ;
4574 };
4575
4576
4577 /**
4578  * CSI ? Ps$ p
4579  *   Request DEC private mode (DECRQM).  For VT300 and up, reply is
4580  *     CSI ? Ps; Pm$ p
4581  *   where Ps is the mode number as in DECSET, Pm is the mode value
4582  *   as in the ANSI DECRQM.
4583  */
4584 Terminal.prototype.requestPrivateMode = function(params) {
4585   ;
4586 };
4587
4588
4589 /**
4590  * CSI Ps ; Ps " p
4591  *   Set conformance level (DECSCL).  Valid values for the first
4592  *   parameter:
4593  *     Ps = 6 1  -> VT100.
4594  *     Ps = 6 2  -> VT200.
4595  *     Ps = 6 3  -> VT300.
4596  *   Valid values for the second parameter:
4597  *     Ps = 0  -> 8-bit controls.
4598  *     Ps = 1  -> 7-bit controls (always set for VT100).
4599  *     Ps = 2  -> 8-bit controls.
4600  */
4601 Terminal.prototype.setConformanceLevel = function(params) {
4602   ;
4603 };
4604
4605
4606 /**
4607  * CSI Ps q  Load LEDs (DECLL).
4608  *     Ps = 0  -> Clear all LEDS (default).
4609  *     Ps = 1  -> Light Num Lock.
4610  *     Ps = 2  -> Light Caps Lock.
4611  *     Ps = 3  -> Light Scroll Lock.
4612  *     Ps = 2  1  -> Extinguish Num Lock.
4613  *     Ps = 2  2  -> Extinguish Caps Lock.
4614  *     Ps = 2  3  -> Extinguish Scroll Lock.
4615  */
4616 Terminal.prototype.loadLEDs = function(params) {
4617   ;
4618 };
4619
4620
4621 /**
4622  * CSI Ps SP q
4623  *   Set cursor style (DECSCUSR, VT520).
4624  *     Ps = 0  -> blinking block.
4625  *     Ps = 1  -> blinking block (default).
4626  *     Ps = 2  -> steady block.
4627  *     Ps = 3  -> blinking underline.
4628  *     Ps = 4  -> steady underline.
4629  */
4630 Terminal.prototype.setCursorStyle = function(params) {
4631   ;
4632 };
4633
4634
4635 /**
4636  * CSI Ps " q
4637  *   Select character protection attribute (DECSCA).  Valid values
4638  *   for the parameter:
4639  *     Ps = 0  -> DECSED and DECSEL can erase (default).
4640  *     Ps = 1  -> DECSED and DECSEL cannot erase.
4641  *     Ps = 2  -> DECSED and DECSEL can erase.
4642  */
4643 Terminal.prototype.setCharProtectionAttr = function(params) {
4644   ;
4645 };
4646
4647
4648 /**
4649  * CSI ? Pm r
4650  *   Restore DEC Private Mode Values.  The value of Ps previously
4651  *   saved is restored.  Ps values are the same as for DECSET.
4652  */
4653 Terminal.prototype.restorePrivateValues = function(params) {
4654   ;
4655 };
4656
4657
4658 /**
4659  * CSI Pt; Pl; Pb; Pr; Ps$ r
4660  *   Change Attributes in Rectangular Area (DECCARA), VT400 and up.
4661  *     Pt; Pl; Pb; Pr denotes the rectangle.
4662  *     Ps denotes the SGR attributes to change: 0, 1, 4, 5, 7.
4663  * NOTE: xterm doesn't enable this code by default.
4664  */
4665 Terminal.prototype.setAttrInRectangle = function(params) {
4666   var t = params[0]
4667   , l = params[1]
4668   , b = params[2]
4669   , r = params[3]
4670   , attr = params[4];
4671
4672   var line
4673   , i;
4674
4675   for (; t < b + 1; t++) {
4676     line = this.lines.get(this.ybase + t);
4677     for (i = l; i < r; i++) {
4678       line[i] = [attr, line[i][1]];
4679     }
4680   }
4681
4682   // this.maxRange();
4683   this.updateRange(params[0]);
4684   this.updateRange(params[2]);
4685 };
4686
4687
4688 /**
4689  * CSI Pc; Pt; Pl; Pb; Pr$ x
4690  *   Fill Rectangular Area (DECFRA), VT420 and up.
4691  *     Pc is the character to use.
4692  *     Pt; Pl; Pb; Pr denotes the rectangle.
4693  * NOTE: xterm doesn't enable this code by default.
4694  */
4695 Terminal.prototype.fillRectangle = function(params) {
4696   var ch = params[0]
4697   , t = params[1]
4698   , l = params[2]
4699   , b = params[3]
4700   , r = params[4];
4701
4702   var line
4703   , i;
4704
4705   for (; t < b + 1; t++) {
4706     line = this.lines.get(this.ybase + t);
4707     for (i = l; i < r; i++) {
4708       line[i] = [line[i][0], String.fromCharCode(ch)];
4709     }
4710   }
4711
4712   // this.maxRange();
4713   this.updateRange(params[1]);
4714   this.updateRange(params[3]);
4715 };
4716
4717
4718 /**
4719  * CSI Ps ; Pu ' z
4720  *   Enable Locator Reporting (DECELR).
4721  *   Valid values for the first parameter:
4722  *     Ps = 0  -> Locator disabled (default).
4723  *     Ps = 1  -> Locator enabled.
4724  *     Ps = 2  -> Locator enabled for one report, then disabled.
4725  *   The second parameter specifies the coordinate unit for locator
4726  *   reports.
4727  *   Valid values for the second parameter:
4728  *     Pu = 0  <- or omitted -> default to character cells.
4729  *     Pu = 1  <- device physical pixels.
4730  *     Pu = 2  <- character cells.
4731  */
4732 Terminal.prototype.enableLocatorReporting = function(params) {
4733   var val = params[0] > 0;
4734   //this.mouseEvents = val;
4735   //this.decLocator = val;
4736 };
4737
4738
4739 /**
4740  * CSI Pt; Pl; Pb; Pr$ z
4741  *   Erase Rectangular Area (DECERA), VT400 and up.
4742  *     Pt; Pl; Pb; Pr denotes the rectangle.
4743  * NOTE: xterm doesn't enable this code by default.
4744  */
4745 Terminal.prototype.eraseRectangle = function(params) {
4746   var t = params[0]
4747   , l = params[1]
4748   , b = params[2]
4749   , r = params[3];
4750
4751   var line
4752   , i
4753   , ch;
4754
4755   ch = [this.eraseAttr(), ' ', 1]; // xterm?
4756
4757   for (; t < b + 1; t++) {
4758     line = this.lines.get(this.ybase + t);
4759     for (i = l; i < r; i++) {
4760       line[i] = ch;
4761     }
4762   }
4763
4764   // this.maxRange();
4765   this.updateRange(params[0]);
4766   this.updateRange(params[2]);
4767 };
4768
4769
4770 /**
4771  * CSI P m SP }
4772  * Insert P s Column(s) (default = 1) (DECIC), VT420 and up.
4773  * NOTE: xterm doesn't enable this code by default.
4774  */
4775 Terminal.prototype.insertColumns = function() {
4776   var param = params[0]
4777   , l = this.ybase + this.rows
4778   , ch = [this.eraseAttr(), ' ', 1] // xterm?
4779   , i;
4780
4781   while (param--) {
4782     for (i = this.ybase; i < l; i++) {
4783       this.lines[i].splice(this.x + 1, 0, ch);
4784       this.lines[i].pop();
4785     }
4786   }
4787
4788   this.maxRange();
4789 };
4790
4791
4792 /**
4793  * CSI P m SP ~
4794  * Delete P s Column(s) (default = 1) (DECDC), VT420 and up
4795  * NOTE: xterm doesn't enable this code by default.
4796  */
4797 Terminal.prototype.deleteColumns = function() {
4798   var param = params[0]
4799   , l = this.ybase + this.rows
4800   , ch = [this.eraseAttr(), ' ', 1] // xterm?
4801   , i;
4802
4803   while (param--) {
4804     for (i = this.ybase; i < l; i++) {
4805       this.lines[i].splice(this.x, 1);
4806       this.lines[i].push(ch);
4807     }
4808   }
4809
4810   this.maxRange();
4811 };
4812
4813 /**
4814  * Character Sets
4815  */
4816
4817 Terminal.charsets = {};
4818
4819 // DEC Special Character and Line Drawing Set.
4820 // http://vt100.net/docs/vt102-ug/table5-13.html
4821 // A lot of curses apps use this if they see TERM=xterm.
4822 // testing: echo -e '\e(0a\e(B'
4823 // The xterm output sometimes seems to conflict with the
4824 // reference above. xterm seems in line with the reference
4825 // when running vttest however.
4826 // The table below now uses xterm's output from vttest.
4827 Terminal.charsets.SCLD = { // (0
4828   '`': '\u25c6', // '◆'
4829   'a': '\u2592', // '▒'
4830   'b': '\u0009', // '\t'
4831   'c': '\u000c', // '\f'
4832   'd': '\u000d', // '\r'
4833   'e': '\u000a', // '\n'
4834   'f': '\u00b0', // '°'
4835   'g': '\u00b1', // '±'
4836   'h': '\u2424', // '\u2424' (NL)
4837   'i': '\u000b', // '\v'
4838   'j': '\u2518', // '┘'
4839   'k': '\u2510', // '┐'
4840   'l': '\u250c', // '┌'
4841   'm': '\u2514', // '└'
4842   'n': '\u253c', // '┼'
4843   'o': '\u23ba', // '⎺'
4844   'p': '\u23bb', // '⎻'
4845   'q': '\u2500', // '─'
4846   'r': '\u23bc', // '⎼'
4847   's': '\u23bd', // '⎽'
4848   't': '\u251c', // '├'
4849   'u': '\u2524', // '┤'
4850   'v': '\u2534', // '┴'
4851   'w': '\u252c', // '┬'
4852   'x': '\u2502', // '│'
4853   'y': '\u2264', // '≤'
4854   'z': '\u2265', // '≥'
4855   '{': '\u03c0', // 'π'
4856   '|': '\u2260', // '≠'
4857   '}': '\u00a3', // '£'
4858   '~': '\u00b7'  // '·'
4859 };
4860
4861 Terminal.charsets.UK = null; // (A
4862 Terminal.charsets.US = null; // (B (USASCII)
4863 Terminal.charsets.Dutch = null; // (4
4864 Terminal.charsets.Finnish = null; // (C or (5
4865 Terminal.charsets.French = null; // (R
4866 Terminal.charsets.FrenchCanadian = null; // (Q
4867 Terminal.charsets.German = null; // (K
4868 Terminal.charsets.Italian = null; // (Y
4869 Terminal.charsets.NorwegianDanish = null; // (E or (6
4870 Terminal.charsets.Spanish = null; // (Z
4871 Terminal.charsets.Swedish = null; // (H or (7
4872 Terminal.charsets.Swiss = null; // (=
4873 Terminal.charsets.ISOLatin = null; // /A
4874
4875 /**
4876  * Helpers
4877  */
4878
4879 function on(el, type, handler, capture) {
4880   if (!Array.isArray(el)) {
4881     el = [el];
4882   }
4883   el.forEach(function (element) {
4884     element.addEventListener(type, handler, capture || false);
4885   });
4886 }
4887
4888 function off(el, type, handler, capture) {
4889   el.removeEventListener(type, handler, capture || false);
4890 }
4891
4892 function cancel(ev, force) {
4893   if (!this.cancelEvents && !force) {
4894     return;
4895   }
4896   ev.preventDefault();
4897   ev.stopPropagation();
4898   return false;
4899 }
4900
4901 function inherits(child, parent) {
4902   function f() {
4903     this.constructor = child;
4904   }
4905   f.prototype = parent.prototype;
4906   child.prototype = new f;
4907 }
4908
4909 // if bold is broken, we can't
4910 // use it in the terminal.
4911 function isBoldBroken(document) {
4912   var body = document.getElementsByTagName('body')[0];
4913   var el = document.createElement('span');
4914   el.innerHTML = 'hello world';
4915   body.appendChild(el);
4916   var w1 = el.scrollWidth;
4917   el.style.fontWeight = 'bold';
4918   var w2 = el.scrollWidth;
4919   body.removeChild(el);
4920   return w1 !== w2;
4921 }
4922
4923 function indexOf(obj, el) {
4924   var i = obj.length;
4925   while (i--) {
4926     if (obj[i] === el) return i;
4927   }
4928   return -1;
4929 }
4930
4931 function isThirdLevelShift(term, ev) {
4932   var thirdLevelKey =
4933       (term.browser.isMac && ev.altKey && !ev.ctrlKey && !ev.metaKey) ||
4934       (term.browser.isMSWindows && ev.altKey && ev.ctrlKey && !ev.metaKey);
4935
4936   if (ev.type == 'keypress') {
4937     return thirdLevelKey;
4938   }
4939
4940   // Don't invoke for arrows, pageDown, home, backspace, etc. (on non-keypress events)
4941   return thirdLevelKey && (!ev.keyCode || ev.keyCode > 47);
4942 }
4943
4944 function matchColor(r1, g1, b1) {
4945   var hash = (r1 << 16) | (g1 << 8) | b1;
4946
4947   if (matchColor._cache[hash] != null) {
4948     return matchColor._cache[hash];
4949   }
4950
4951   var ldiff = Infinity
4952   , li = -1
4953   , i = 0
4954   , c
4955   , r2
4956   , g2
4957   , b2
4958   , diff;
4959
4960   for (; i < Terminal.vcolors.length; i++) {
4961     c = Terminal.vcolors[i];
4962     r2 = c[0];
4963     g2 = c[1];
4964     b2 = c[2];
4965
4966     diff = matchColor.distance(r1, g1, b1, r2, g2, b2);
4967
4968     if (diff === 0) {
4969       li = i;
4970       break;
4971     }
4972
4973     if (diff < ldiff) {
4974       ldiff = diff;
4975       li = i;
4976     }
4977   }
4978
4979   return matchColor._cache[hash] = li;
4980 }
4981
4982 matchColor._cache = {};
4983
4984 // http://stackoverflow.com/questions/1633828
4985 matchColor.distance = function(r1, g1, b1, r2, g2, b2) {
4986   return Math.pow(30 * (r1 - r2), 2)
4987     + Math.pow(59 * (g1 - g2), 2)
4988     + Math.pow(11 * (b1 - b2), 2);
4989 };
4990
4991 function each(obj, iter, con) {
4992   if (obj.forEach) return obj.forEach(iter, con);
4993   for (var i = 0; i < obj.length; i++) {
4994     iter.call(con, obj[i], i, obj);
4995   }
4996 }
4997
4998 function keys(obj) {
4999   if (Object.keys) return Object.keys(obj);
5000   var key, keys = [];
5001   for (key in obj) {
5002     if (Object.prototype.hasOwnProperty.call(obj, key)) {
5003       keys.push(key);
5004     }
5005   }
5006   return keys;
5007 }
5008
5009 var wcwidth = (function(opts) {
5010   // extracted from https://www.cl.cam.ac.uk/%7Emgk25/ucs/wcwidth.c
5011   // combining characters
5012   var COMBINING = [
5013     [0x0300, 0x036F], [0x0483, 0x0486], [0x0488, 0x0489],
5014     [0x0591, 0x05BD], [0x05BF, 0x05BF], [0x05C1, 0x05C2],
5015     [0x05C4, 0x05C5], [0x05C7, 0x05C7], [0x0600, 0x0603],
5016     [0x0610, 0x0615], [0x064B, 0x065E], [0x0670, 0x0670],
5017     [0x06D6, 0x06E4], [0x06E7, 0x06E8], [0x06EA, 0x06ED],
5018     [0x070F, 0x070F], [0x0711, 0x0711], [0x0730, 0x074A],
5019     [0x07A6, 0x07B0], [0x07EB, 0x07F3], [0x0901, 0x0902],
5020     [0x093C, 0x093C], [0x0941, 0x0948], [0x094D, 0x094D],
5021     [0x0951, 0x0954], [0x0962, 0x0963], [0x0981, 0x0981],
5022     [0x09BC, 0x09BC], [0x09C1, 0x09C4], [0x09CD, 0x09CD],
5023     [0x09E2, 0x09E3], [0x0A01, 0x0A02], [0x0A3C, 0x0A3C],
5024     [0x0A41, 0x0A42], [0x0A47, 0x0A48], [0x0A4B, 0x0A4D],
5025     [0x0A70, 0x0A71], [0x0A81, 0x0A82], [0x0ABC, 0x0ABC],
5026     [0x0AC1, 0x0AC5], [0x0AC7, 0x0AC8], [0x0ACD, 0x0ACD],
5027     [0x0AE2, 0x0AE3], [0x0B01, 0x0B01], [0x0B3C, 0x0B3C],
5028     [0x0B3F, 0x0B3F], [0x0B41, 0x0B43], [0x0B4D, 0x0B4D],
5029     [0x0B56, 0x0B56], [0x0B82, 0x0B82], [0x0BC0, 0x0BC0],
5030     [0x0BCD, 0x0BCD], [0x0C3E, 0x0C40], [0x0C46, 0x0C48],
5031     [0x0C4A, 0x0C4D], [0x0C55, 0x0C56], [0x0CBC, 0x0CBC],
5032     [0x0CBF, 0x0CBF], [0x0CC6, 0x0CC6], [0x0CCC, 0x0CCD],
5033     [0x0CE2, 0x0CE3], [0x0D41, 0x0D43], [0x0D4D, 0x0D4D],
5034     [0x0DCA, 0x0DCA], [0x0DD2, 0x0DD4], [0x0DD6, 0x0DD6],
5035     [0x0E31, 0x0E31], [0x0E34, 0x0E3A], [0x0E47, 0x0E4E],
5036     [0x0EB1, 0x0EB1], [0x0EB4, 0x0EB9], [0x0EBB, 0x0EBC],
5037     [0x0EC8, 0x0ECD], [0x0F18, 0x0F19], [0x0F35, 0x0F35],
5038     [0x0F37, 0x0F37], [0x0F39, 0x0F39], [0x0F71, 0x0F7E],
5039     [0x0F80, 0x0F84], [0x0F86, 0x0F87], [0x0F90, 0x0F97],
5040     [0x0F99, 0x0FBC], [0x0FC6, 0x0FC6], [0x102D, 0x1030],
5041     [0x1032, 0x1032], [0x1036, 0x1037], [0x1039, 0x1039],
5042     [0x1058, 0x1059], [0x1160, 0x11FF], [0x135F, 0x135F],
5043     [0x1712, 0x1714], [0x1732, 0x1734], [0x1752, 0x1753],
5044     [0x1772, 0x1773], [0x17B4, 0x17B5], [0x17B7, 0x17BD],
5045     [0x17C6, 0x17C6], [0x17C9, 0x17D3], [0x17DD, 0x17DD],
5046     [0x180B, 0x180D], [0x18A9, 0x18A9], [0x1920, 0x1922],
5047     [0x1927, 0x1928], [0x1932, 0x1932], [0x1939, 0x193B],
5048     [0x1A17, 0x1A18], [0x1B00, 0x1B03], [0x1B34, 0x1B34],
5049     [0x1B36, 0x1B3A], [0x1B3C, 0x1B3C], [0x1B42, 0x1B42],
5050     [0x1B6B, 0x1B73], [0x1DC0, 0x1DCA], [0x1DFE, 0x1DFF],
5051     [0x200B, 0x200F], [0x202A, 0x202E], [0x2060, 0x2063],
5052     [0x206A, 0x206F], [0x20D0, 0x20EF], [0x302A, 0x302F],
5053     [0x3099, 0x309A], [0xA806, 0xA806], [0xA80B, 0xA80B],
5054     [0xA825, 0xA826], [0xFB1E, 0xFB1E], [0xFE00, 0xFE0F],
5055     [0xFE20, 0xFE23], [0xFEFF, 0xFEFF], [0xFFF9, 0xFFFB],
5056     [0x10A01, 0x10A03], [0x10A05, 0x10A06], [0x10A0C, 0x10A0F],
5057     [0x10A38, 0x10A3A], [0x10A3F, 0x10A3F], [0x1D167, 0x1D169],
5058     [0x1D173, 0x1D182], [0x1D185, 0x1D18B], [0x1D1AA, 0x1D1AD],
5059     [0x1D242, 0x1D244], [0xE0001, 0xE0001], [0xE0020, 0xE007F],
5060     [0xE0100, 0xE01EF]
5061   ];
5062   // binary search
5063   function bisearch(ucs) {
5064     var min = 0;
5065     var max = COMBINING.length - 1;
5066     var mid;
5067     if (ucs < COMBINING[0][0] || ucs > COMBINING[max][1])
5068       return false;
5069     while (max >= min) {
5070       mid = Math.floor((min + max) / 2);
5071       if (ucs > COMBINING[mid][1])
5072         min = mid + 1;
5073       else if (ucs < COMBINING[mid][0])
5074         max = mid - 1;
5075       else
5076         return true;
5077     }
5078     return false;
5079   }
5080   function wcwidth(ucs) {
5081     // test for 8-bit control characters
5082     if (ucs === 0)
5083       return opts.nul;
5084     if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0))
5085       return opts.control;
5086     // binary search in table of non-spacing characters
5087     if (bisearch(ucs))
5088       return 0;
5089     // if we arrive here, ucs is not a combining or C0/C1 control character
5090     return 1 +
5091       (
5092       ucs >= 0x1100 &&
5093       (
5094         ucs <= 0x115f ||                // Hangul Jamo init. consonants
5095         ucs == 0x2329 ||
5096         ucs == 0x232a ||
5097         (ucs >= 0x2e80 && ucs <= 0xa4cf && ucs != 0x303f) ||  // CJK..Yi
5098         (ucs >= 0xac00 && ucs <= 0xd7a3) ||    // Hangul Syllables
5099         (ucs >= 0xf900 && ucs <= 0xfaff) ||    // CJK Compat Ideographs
5100         (ucs >= 0xfe10 && ucs <= 0xfe19) ||    // Vertical forms
5101         (ucs >= 0xfe30 && ucs <= 0xfe6f) ||    // CJK Compat Forms
5102         (ucs >= 0xff00 && ucs <= 0xff60) ||    // Fullwidth Forms
5103         (ucs >= 0xffe0 && ucs <= 0xffe6) ||
5104         (ucs >= 0x20000 && ucs <= 0x2fffd) ||
5105         (ucs >= 0x30000 && ucs <= 0x3fffd)
5106       )
5107     );
5108   }
5109   return wcwidth;
5110 })({nul: 0, control: 0});  // configurable options
5111
5112 /**
5113  * Expose
5114  */
5115
5116 Terminal.EventEmitter = EventEmitter;
5117 Terminal.inherits = inherits;
5118
5119 /**
5120  * Adds an event listener to the terminal.
5121  *
5122  * @param {string} event The name of the event. TODO: Document all event types
5123  * @param {function} callback The function to call when the event is triggered.
5124  */
5125 Terminal.on = on;
5126 Terminal.off = off;
5127 Terminal.cancel = cancel;
5128
5129 module.exports = Terminal;