[mirror_xterm.js.git] / dist / xterm.js.map

{
  "version": 3,
  "sources": [
    "node_modules/browser-pack/_prelude.js",
    "src/CompositionHelper.js",
    "src/EventEmitter.js",
    "src/Viewport.js",
    "src/handlers/Clipboard.js",
    "src/utils/Browser.js",
    "src/utils/Generic.js",
    "src/xterm.js"
  ],
  "names": [],
  "mappings": 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    "(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require==\"function\"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error(\"Cannot find module '\"+o+\"'\");throw f.code=\"MODULE_NOT_FOUND\",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require==\"function\"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})",
    "/**\n * xterm.js: xterm, in the browser\n * Copyright (c) 2014-2016, SourceLair Private Company (www.sourcelair.com (MIT License)\n */\n\n/**\n * Encapsulates the logic for handling compositionstart, compositionupdate and compositionend\n * events, displaying the in-progress composition to the UI and forwarding the final composition\n * to the handler.\n * @param {HTMLTextAreaElement} textarea The textarea that xterm uses for input.\n * @param {HTMLElement} compositionView The element to display the in-progress composition in.\n * @param {Terminal} terminal The Terminal to forward the finished composition to.\n */\nfunction CompositionHelper(textarea, compositionView, terminal) {\n  this.textarea = textarea;\n  this.compositionView = compositionView;\n  this.terminal = terminal;\n\n  // Whether input composition is currently happening, eg. via a mobile keyboard, speech input\n  // or IME. This variable determines whether the compositionText should be displayed on the UI.\n  this.isComposing = false;\n\n  // The input currently being composed, eg. via a mobile keyboard, speech input or IME.\n  this.compositionText = null;\n\n  // The position within the input textarea's value of the current composition.\n  this.compositionPosition = { start: null, end: null };\n\n  // Whether a composition is in the process of being sent, setting this to false will cancel\n  // any in-progress composition.\n  this.isSendingComposition = false;\n}\n\n/**\n * Handles the compositionstart event, activating the composition view.\n */\nCompositionHelper.prototype.compositionstart = function() {\n  this.isComposing = true;\n  this.compositionPosition.start = this.textarea.value.length;\n  this.compositionView.textContent = '';\n  this.compositionView.classList.add('active');\n};\n\n/**\n * Handles the compositionupdate event, updating the composition view.\n * @param {CompositionEvent} ev The event.\n */\nCompositionHelper.prototype.compositionupdate = function(ev) {\n  this.compositionView.textContent = ev.data;\n  this.updateCompositionElements();\n  var self = this;\n  setTimeout(function() {\n    self.compositionPosition.end = self.textarea.value.length;\n  }, 0);\n};\n\n/**\n * Handles the compositionend event, hiding the composition view and sending the composition to\n * the handler.\n */\nCompositionHelper.prototype.compositionend = function() {\n  this.finalizeComposition(true);\n};\n\n/**\n * Handles the keydown event, routing any necessary events to the CompositionHelper functions.\n * @return Whether the Terminal should continue processing the keydown event.\n */\nCompositionHelper.prototype.keydown = function(ev) {\n  if (this.isComposing || this.isSendingComposition) {\n    if (ev.keyCode === 229) {\n      // Continue composing if the keyCode is the \"composition character\"\n      return false;\n    } else if (ev.keyCode === 16 || ev.keyCode === 17 || ev.keyCode === 18) {\n      // Continue composing if the keyCode is a modifier key\n      return false;\n    } else {\n      // Finish composition immediately. This is mainly here for the case where enter is\n      // pressed and the handler needs to be triggered before the command is executed.\n      this.finalizeComposition(false);\n    }\n  }\n\n  if (ev.keyCode === 229) {\n    // If the \"composition character\" is used but gets to this point it means a non-composition\n    // character (eg. numbers and punctuation) was pressed when the IME was active.\n    this.handleAnyTextareaChanges();\n    return false;\n  }\n\n  return true;\n};\n\n/**\n * Finalizes the composition, resuming regular input actions. This is called when a composition\n * is ending.\n * @param {boolean} waitForPropogation Whether to wait for events to propogate before sending\n *   the input. This should be false if a non-composition keystroke is entered before the\n *   compositionend event is triggered, such as enter, so that the composition is send before\n *   the command is executed.\n */\nCompositionHelper.prototype.finalizeComposition = function(waitForPropogation) {\n  this.compositionView.classList.remove('active');\n  this.isComposing = false;\n  this.clearTextareaPosition();\n\n  if (!waitForPropogation) {\n    // Cancel any delayed composition send requests and send the input immediately.\n    this.isSendingComposition = false;\n    var input = this.textarea.value.substring(this.compositionPosition.start, this.compositionPosition.end);\n    this.terminal.handler(input);\n  } else {\n    // Make a deep copy of the composition position here as a new compositionstart event may\n    // fire before the setTimeout executes.\n    var currentCompositionPosition = {\n      start: this.compositionPosition.start,\n      end: this.compositionPosition.end,\n    }\n\n    // Since composition* events happen before the changes take place in the textarea on most\n    // browsers, use a setTimeout with 0ms time to allow the native compositionend event to\n    // complete. This ensures the correct character is retrieved, this solution was used\n    // because:\n    // - The compositionend event's data property is unreliable, at least on Chromium\n    // - The last compositionupdate event's data property does not always accurately describe\n    //   the character, a counter example being Korean where an ending consonsant can move to\n    //   the following character if the following input is a vowel.\n    var self = this;\n    this.isSendingComposition = true;\n    setTimeout(function () {\n      // Ensure that the input has not already been sent\n      if (self.isSendingComposition) {\n        self.isSendingComposition = false;\n        var input;\n        if (self.isComposing) {\n          // Use the end position to get the string if a new composition has started.\n          input = self.textarea.value.substring(currentCompositionPosition.start, currentCompositionPosition.end);\n        } else {\n          // Don't use the end position here in order to pick up any characters after the\n          // composition has finished, for example when typing a non-composition character\n          // (eg. 2) after a composition character.\n          input = self.textarea.value.substring(currentCompositionPosition.start);\n        }\n        self.terminal.handler(input);\n      }\n    }, 0);\n  }\n};\n\n/**\n * Apply any changes made to the textarea after the current event chain is allowed to complete.\n * This should be called when not currently composing but a keydown event with the \"composition\n * character\" (229) is triggered, in order to allow non-composition text to be entered when an\n * IME is active.\n */\nCompositionHelper.prototype.handleAnyTextareaChanges = function() {\n  var oldValue = this.textarea.value;\n  var self = this;\n  setTimeout(function() {\n    // Ignore if a composition has started since the timeout\n    if (!self.isComposing) {\n      var newValue = self.textarea.value;\n      var diff = newValue.replace(oldValue, '');\n      if (diff.length > 0) {\n        self.terminal.handler(diff);\n      }\n    }\n  }, 0);\n};\n\n/**\n * Positions the composition view on top of the cursor and the textarea just below it (so the\n * IME helper dialog is positioned correctly).\n */\nCompositionHelper.prototype.updateCompositionElements = function(dontRecurse) {\n  if (!this.isComposing) {\n    return;\n  }\n  var cursor = this.terminal.element.querySelector('.terminal-cursor');\n  if (cursor) {\n    // Take .xterm-rows offsetTop into account as well in case it's positioned absolutely within\n    // the .xterm element.\n    var xtermRows = this.terminal.element.querySelector('.xterm-rows');\n    var cursorTop = xtermRows.offsetTop + cursor.offsetTop;\n\n    this.compositionView.style.left = cursor.offsetLeft + 'px';\n    this.compositionView.style.top = cursorTop + 'px';\n    this.compositionView.style.height = cursor.offsetHeight + 'px';\n    this.compositionView.style.lineHeight = cursor.offsetHeight + 'px';\n    // Sync the textarea to the exact position of the composition view so the IME knows where the\n    // text is.\n    var compositionViewBounds = this.compositionView.getBoundingClientRect();\n    this.textarea.style.left = cursor.offsetLeft + 'px';\n    this.textarea.style.top = cursorTop + 'px';\n    this.textarea.style.width = compositionViewBounds.width + 'px';\n    this.textarea.style.height = compositionViewBounds.height + 'px';\n    this.textarea.style.lineHeight = compositionViewBounds.height + 'px';\n  }\n  if (!dontRecurse) {\n    setTimeout(this.updateCompositionElements.bind(this, true), 0);\n  }\n};\n\n/**\n * Clears the textarea's position so that the cursor does not blink on IE.\n * @private\n */\nCompositionHelper.prototype.clearTextareaPosition = function() {\n  this.textarea.style.left = '';\n  this.textarea.style.top = '';\n};\n\nexport { CompositionHelper };\n",
    "/**\n * xterm.js: xterm, in the browser\n * Copyright (c) 2014-2016, SourceLair Private Company (www.sourcelair.com (MIT License)\n */\n\nfunction EventEmitter() {\n  this._events = this._events || {};\n}\n\nEventEmitter.prototype.addListener = function(type, listener) {\n  this._events[type] = this._events[type] || [];\n  this._events[type].push(listener);\n};\n\nEventEmitter.prototype.on = EventEmitter.prototype.addListener;\n\nEventEmitter.prototype.removeListener = function(type, listener) {\n  if (!this._events[type]) return;\n\n  var obj = this._events[type]\n  , i = obj.length;\n\n  while (i--) {\n    if (obj[i] === listener || obj[i].listener === listener) {\n      obj.splice(i, 1);\n      return;\n    }\n  }\n};\n\nEventEmitter.prototype.off = EventEmitter.prototype.removeListener;\n\nEventEmitter.prototype.removeAllListeners = function(type) {\n  if (this._events[type]) delete this._events[type];\n};\n\nEventEmitter.prototype.once = function(type, listener) {\n  var self = this;\n  function on() {\n    var args = Array.prototype.slice.call(arguments);\n    this.removeListener(type, on);\n    return listener.apply(this, args);\n  }\n  on.listener = listener;\n  return this.on(type, on);\n};\n\nEventEmitter.prototype.emit = function(type) {\n  if (!this._events[type]) return;\n\n  var args = Array.prototype.slice.call(arguments, 1)\n  , obj = this._events[type]\n  , l = obj.length\n  , i = 0;\n\n  for (; i < l; i++) {\n    obj[i].apply(this, args);\n  }\n};\n\nEventEmitter.prototype.listeners = function(type) {\n  return this._events[type] = this._events[type] || [];\n};\n\nexport { EventEmitter };\n",
    "/**\n * xterm.js: xterm, in the browser\n * Copyright (c) 2014-2016, SourceLair Private Company (www.sourcelair.com (MIT License)\n */\n\n/**\n * Represents the viewport of a terminal, the visible area within the larger buffer of output.\n * Logic for the virtual scroll bar is included in this object.\n * @param {Terminal} terminal The Terminal object.\n * @param {HTMLElement} viewportElement The DOM element acting as the viewport\n * @param {HTMLElement} charMeasureElement A DOM element used to measure the character size of\n *   the terminal.\n */\nfunction Viewport(terminal, viewportElement, scrollArea, charMeasureElement) {\n  this.terminal = terminal;\n  this.viewportElement = viewportElement;\n  this.scrollArea = scrollArea;\n  this.charMeasureElement = charMeasureElement;\n  this.currentRowHeight = 0;\n  this.lastRecordedBufferLength = 0;\n  this.lastRecordedViewportHeight = 0;\n\n  this.terminal.on('scroll', this.syncScrollArea.bind(this));\n  this.terminal.on('resize', this.syncScrollArea.bind(this));\n  this.viewportElement.addEventListener('scroll', this.onScroll.bind(this));\n\n  this.syncScrollArea();\n}\n\n/**\n * Refreshes row height, setting line-height, viewport height and scroll area height if\n * necessary.\n * @param {number|undefined} charSize A character size measurement bounding rect object, if it\n *   doesn't exist it will be created.\n */\nViewport.prototype.refresh = function(charSize) {\n  var size = charSize || this.charMeasureElement.getBoundingClientRect();\n  if (size.height > 0) {\n    var rowHeightChanged = size.height !== this.currentRowHeight;\n    if (rowHeightChanged) {\n      this.currentRowHeight = size.height;\n      this.viewportElement.style.lineHeight = size.height + 'px';\n      this.terminal.rowContainer.style.lineHeight = size.height + 'px';\n    }\n    var viewportHeightChanged = this.lastRecordedViewportHeight !== this.terminal.rows;\n    if (rowHeightChanged || viewportHeightChanged) {\n      this.lastRecordedViewportHeight = this.terminal.rows;\n      this.viewportElement.style.height = size.height * this.terminal.rows + 'px';\n    }\n    this.scrollArea.style.height = (size.height * this.lastRecordedBufferLength) + 'px';\n  }\n};\n\n/**\n * Updates dimensions and synchronizes the scroll area if necessary.\n */\nViewport.prototype.syncScrollArea = function() {\n  if (this.lastRecordedBufferLength !== this.terminal.lines.length) {\n    // If buffer height changed\n    this.lastRecordedBufferLength = this.terminal.lines.length;\n    this.refresh();\n  } else if (this.lastRecordedViewportHeight !== this.terminal.rows) {\n    // If viewport height changed\n    this.refresh();\n  } else {\n    // If size has changed, refresh viewport\n    var size = this.charMeasureElement.getBoundingClientRect();\n    if (size.height !== this.currentRowHeight) {\n      this.refresh(size);\n    }\n  }\n\n  // Sync scrollTop\n  var scrollTop = this.terminal.ydisp * this.currentRowHeight;\n  if (this.viewportElement.scrollTop !== scrollTop) {\n    this.viewportElement.scrollTop = scrollTop;\n  }\n};\n\n/**\n * Handles scroll events on the viewport, calculating the new viewport and requesting the\n * terminal to scroll to it.\n * @param {Event} ev The scroll event.\n */\nViewport.prototype.onScroll = function(ev) {\n  var newRow = Math.round(this.viewportElement.scrollTop / this.currentRowHeight);\n  var diff = newRow - this.terminal.ydisp;\n  this.terminal.scrollDisp(diff, true);\n};\n\n/**\n * Handles mouse wheel events by adjusting the viewport's scrollTop and delegating the actual\n * scrolling to `onScroll`, this event needs to be attached manually by the consumer of\n * `Viewport`.\n * @param {WheelEvent} ev The mouse wheel event.\n */\nViewport.prototype.onWheel = function(ev) {\n  if (ev.deltaY === 0) {\n    // Do nothing if it's not a vertical scroll event\n    return;\n  }\n  // Fallback to WheelEvent.DOM_DELTA_PIXEL\n  var multiplier = 1;\n  if (ev.deltaMode === WheelEvent.DOM_DELTA_LINE) {\n    multiplier = this.currentRowHeight;\n  } else if (ev.deltaMode === WheelEvent.DOM_DELTA_PAGE) {\n    multiplier = this.currentRowHeight * this.terminal.rows;\n  }\n  this.viewportElement.scrollTop += ev.deltaY * multiplier;\n  // Prevent the page from scrolling when the terminal scrolls\n  ev.preventDefault();\n};\n\nexport { Viewport };\n",
    "/**\n * xterm.js: xterm, in the browser\n * Copyright (c) 2016, SourceLair Private Company <www.sourcelair.com> (MIT License)\n */\n\n/**\n * Clipboard handler module. This module contains methods for handling all\n * clipboard-related events appropriately in the terminal.\n * @module xterm/handlers/Clipboard\n */\n\n/**\n * Prepares text copied from terminal selection, to be saved in the clipboard by:\n *   1. stripping all trailing white spaces\n *   2. converting all non-breaking spaces to regular spaces\n * @param {string} text The copied text that needs processing for storing in clipboard\n * @returns {string}\n */\nfunction prepareTextForClipboard(text) {\n  var space = String.fromCharCode(32),\n      nonBreakingSpace = String.fromCharCode(160),\n      allNonBreakingSpaces = new RegExp(nonBreakingSpace, 'g'),\n      processedText = text.split('\\n').map(function (line) {\n        // Strip all trailing white spaces and convert all non-breaking spaces\n        // to regular spaces.\n        var processedLine = line.replace(/\\s+$/g, '').replace(allNonBreakingSpaces, space);\n\n        return processedLine;\n      }).join('\\n');\n\n  return processedText;\n}\n\n/**\n * Binds copy functionality to the given terminal.\n * @param {ClipboardEvent} ev The original copy event to be handled\n */\nfunction copyHandler(ev, term) {\n  var copiedText = window.getSelection().toString(),\n      text = prepareTextForClipboard(copiedText);\n\n  if (term.browser.isMSIE) {\n    window.clipboardData.setData('Text', text);\n  } else {\n    ev.clipboardData.setData('text/plain', text);\n  }\n\n  ev.preventDefault(); // Prevent or the original text will be copied.\n}\n\n/**\n * Redirect the clipboard's data to the terminal's input handler.\n * @param {ClipboardEvent} ev The original paste event to be handled\n * @param {Terminal} term The terminal on which to apply the handled paste event\n */\nfunction pasteHandler(ev, term) {\n  ev.stopPropagation();\n\n  var dispatchPaste = function(text) {\n    term.handler(text);\n    term.textarea.value = '';\n    return term.cancel(ev);\n  };\n\n  if (term.browser.isMSIE) {\n    if (window.clipboardData) {\n      var text = window.clipboardData.getData('Text');\n      dispatchPaste(text);\n    }\n  } else {\n    if (ev.clipboardData) {\n      var text = ev.clipboardData.getData('text/plain');\n      dispatchPaste(text);\n    }\n  }\n}\n\n/**\n * Bind to right-click event and allow right-click copy and paste.\n *\n * **Logic**\n * If text is selected and right-click happens on selected text, then\n * do nothing to allow seamless copying.\n * If no text is selected or right-click is outside of the selection\n * area, then bring the terminal's input below the cursor, in order to\n * trigger the event on the textarea and allow-right click paste, without\n * caring about disappearing selection.\n * @param {ClipboardEvent} ev The original paste event to be handled\n * @param {Terminal} term The terminal on which to apply the handled paste event\n */\nfunction rightClickHandler(ev, term) {\n  var s = document.getSelection(),\n      selectedText = prepareTextForClipboard(s.toString()),\n      clickIsOnSelection = false;\n\n  if (s.rangeCount) {\n    var r = s.getRangeAt(0),\n        cr = r.getClientRects(),\n        x = ev.clientX,\n        y = ev.clientY,\n        i, rect;\n\n    for (i=0; i<cr.length; i++) {\n      rect = cr[i];\n      clickIsOnSelection = (\n        (x > rect.left) && (x < rect.right) &&\n        (y > rect.top) && (y < rect.bottom)\n      );\n\n      if (clickIsOnSelection) {\n        break;\n      }\n    }\n    // If we clicked on selection and selection is not a single space,\n    // then mark the right click as copy-only. We check for the single\n    // space selection, as this can happen when clicking on an &nbsp;\n    // and there is not much pointing in copying a single space.\n    if (selectedText.match(/^\\s$/) || !selectedText.length) {\n      clickIsOnSelection = false;\n    }\n  }\n\n  // Bring textarea at the cursor position\n  if (!clickIsOnSelection) {\n    term.textarea.style.position = 'fixed';\n    term.textarea.style.width = '20px';\n    term.textarea.style.height = '20px';\n    term.textarea.style.left = (x - 10) + 'px';\n    term.textarea.style.top = (y - 10) + 'px';\n    term.textarea.style.zIndex = 1000;\n    term.textarea.focus();\n\n    // Reset the terminal textarea's styling\n    setTimeout(function () {\n      term.textarea.style.position = null;\n      term.textarea.style.width = null;\n      term.textarea.style.height = null;\n      term.textarea.style.left = null;\n      term.textarea.style.top = null;\n      term.textarea.style.zIndex = null;\n    }, 4);\n  }\n}\n\nexport {\n  prepareTextForClipboard, copyHandler, pasteHandler, rightClickHandler\n};\n",
    "/**\n * xterm.js: xterm, in the browser\n * Copyright (c) 2016, SourceLair Private Company <www.sourcelair.com> (MIT License)\n */\n\n/**\n * Browser utilities module. This module contains attributes and methods to help with\n * identifying the current browser and platform.\n * @module xterm/utils/Browser\n */\n\nimport { contains } from './Generic.js';\n\nlet isNode = (typeof navigator == 'undefined') ? true : false;\nlet userAgent = (isNode) ? 'node' : navigator.userAgent;\nlet platform = (isNode) ? 'node' : navigator.platform;\n\nexport let isFirefox = !!~userAgent.indexOf('Firefox');\nexport let isMSIE = !!~userAgent.indexOf('MSIE') || !!~userAgent.indexOf('Trident');\n\n// Find the users platform. We use this to interpret the meta key\n// and ISO third level shifts.\n// http://stackoverflow.com/q/19877924/577598\nexport let isMac = contains(['Macintosh', 'MacIntel', 'MacPPC', 'Mac68K'], platform);\nexport let isIpad = platform === 'iPad';\nexport let isIphone = platform === 'iPhone';\nexport let isMSWindows = contains(['Windows', 'Win16', 'Win32', 'WinCE'], platform);\n",
    "/**\n * xterm.js: xterm, in the browser\n * Copyright (c) 2016, SourceLair Private Company <www.sourcelair.com> (MIT License)\n */\n\n/**\n * Generic utilities module. This module contains generic methods that can be helpful at\n * different parts of the code base.\n * @module xterm/utils/Generic\n */\n\n/**\n * Return if the given array contains the given element\n * @param {Array} array The array to search for the given element.\n * @param {Object} el The element to look for into the array\n */\nexport let contains = function(arr, el) {\n  return arr.indexOf(el) >= 0;\n};\n",
    "/**\n * xterm.js: xterm, in the browser\n * Copyright (c) 2014-2014, SourceLair Private Company <www.sourcelair.com> (MIT License)\n * Copyright (c) 2012-2013, Christopher Jeffrey (MIT License)\n * https://github.com/chjj/term.js\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n *\n * Originally forked from (with the author's permission):\n *   Fabrice Bellard's javascript vt100 for jslinux:\n *   http://bellard.org/jslinux/\n *   Copyright (c) 2011 Fabrice Bellard\n *   The original design remains. The terminal itself\n *   has been extended to include xterm CSI codes, among\n *   other features.\n */\n\nimport { CompositionHelper } from './CompositionHelper.js';\nimport { EventEmitter } from './EventEmitter.js';\nimport { Viewport } from './Viewport.js';\nimport { rightClickHandler, pasteHandler, copyHandler } from './handlers/Clipboard.js';\nimport * as Browser from './utils/Browser';\n\n/**\n * Terminal Emulation References:\n *   http://vt100.net/\n *   http://invisible-island.net/xterm/ctlseqs/ctlseqs.txt\n *   http://invisible-island.net/xterm/ctlseqs/ctlseqs.html\n *   http://invisible-island.net/vttest/\n *   http://www.inwap.com/pdp10/ansicode.txt\n *   http://linux.die.net/man/4/console_codes\n *   http://linux.die.net/man/7/urxvt\n */\n\n// Let it work inside Node.js for automated testing purposes.\nvar document = (typeof window != 'undefined') ? window.document : null;\n\n/**\n * States\n */\nvar normal = 0, escaped = 1, csi = 2, osc = 3, charset = 4, dcs = 5, ignore = 6;\n\n/**\n * Terminal\n */\n\n/**\n * Creates a new `Terminal` object.\n *\n * @param {object} options An object containing a set of options, the available options are:\n *   - `cursorBlink` (boolean): Whether the terminal cursor blinks\n *   - `cols` (number): The number of columns of the terminal (horizontal size)\n *   - `rows` (number): The number of rows of the terminal (vertical size)\n *\n * @public\n * @class Xterm Xterm\n * @alias module:xterm/src/xterm\n */\nfunction Terminal(options) {\n  var self = this;\n\n  if (!(this instanceof Terminal)) {\n    return new Terminal(arguments[0], arguments[1], arguments[2]);\n  }\n\n  self.browser = Browser;\n  self.cancel = Terminal.cancel;\n\n  EventEmitter.call(this);\n\n  if (typeof options === 'number') {\n    options = {\n      cols: arguments[0],\n      rows: arguments[1],\n      handler: arguments[2]\n    };\n  }\n\n  options = options || {};\n\n\n  Object.keys(Terminal.defaults).forEach(function(key) {\n    if (options[key] == null) {\n      options[key] = Terminal.options[key];\n\n      if (Terminal[key] !== Terminal.defaults[key]) {\n        options[key] = Terminal[key];\n      }\n    }\n    self[key] = options[key];\n  });\n\n  if (options.colors.length === 8) {\n    options.colors = options.colors.concat(Terminal._colors.slice(8));\n  } else if (options.colors.length === 16) {\n    options.colors = options.colors.concat(Terminal._colors.slice(16));\n  } else if (options.colors.length === 10) {\n    options.colors = options.colors.slice(0, -2).concat(\n      Terminal._colors.slice(8, -2), options.colors.slice(-2));\n  } else if (options.colors.length === 18) {\n    options.colors = options.colors.concat(\n      Terminal._colors.slice(16, -2), options.colors.slice(-2));\n  }\n  this.colors = options.colors;\n\n  this.options = options;\n\n  // this.context = options.context || window;\n  // this.document = options.document || document;\n  this.parent = options.body || options.parent || (\n    document ? document.getElementsByTagName('body')[0] : null\n  );\n\n  this.cols = options.cols || options.geometry[0];\n  this.rows = options.rows || options.geometry[1];\n  this.geometry = [this.cols, this.rows];\n\n  if (options.handler) {\n    this.on('data', options.handler);\n  }\n\n  /**\n   * The scroll position of the y cursor, ie. ybase + y = the y position within the entire\n   * buffer\n   */\n  this.ybase = 0;\n\n  /**\n   * The scroll position of the viewport\n   */\n  this.ydisp = 0;\n\n  /**\n   * The cursor's x position after ybase\n   */\n  this.x = 0;\n\n  /**\n   * The cursor's y position after ybase\n   */\n  this.y = 0;\n\n  /**\n   * Used to debounce the refresh function\n   */\n  this.isRefreshing = false;\n\n  /**\n   * Whether there is a full terminal refresh queued\n   */\n\n  this.cursorState = 0;\n  this.cursorHidden = false;\n  this.convertEol;\n  this.state = 0;\n  this.queue = '';\n  this.scrollTop = 0;\n  this.scrollBottom = this.rows - 1;\n  this.customKeydownHandler = null;\n\n  // modes\n  this.applicationKeypad = false;\n  this.applicationCursor = false;\n  this.originMode = false;\n  this.insertMode = false;\n  this.wraparoundMode = true; // defaults: xterm - true, vt100 - false\n  this.normal = null;\n\n  // charset\n  this.charset = null;\n  this.gcharset = null;\n  this.glevel = 0;\n  this.charsets = [null];\n\n  // mouse properties\n  this.decLocator;\n  this.x10Mouse;\n  this.vt200Mouse;\n  this.vt300Mouse;\n  this.normalMouse;\n  this.mouseEvents;\n  this.sendFocus;\n  this.utfMouse;\n  this.sgrMouse;\n  this.urxvtMouse;\n\n  // misc\n  this.element;\n  this.children;\n  this.refreshStart;\n  this.refreshEnd;\n  this.savedX;\n  this.savedY;\n  this.savedCols;\n\n  // stream\n  this.readable = true;\n  this.writable = true;\n\n  this.defAttr = (0 << 18) | (257 << 9) | (256 << 0);\n  this.curAttr = this.defAttr;\n\n  this.params = [];\n  this.currentParam = 0;\n  this.prefix = '';\n  this.postfix = '';\n\n  // leftover surrogate high from previous write invocation\n  this.surrogate_high = '';\n\n  /**\n   * An array of all lines in the entire buffer, including the prompt. The lines are array of\n   * characters which are 2-length arrays where [0] is an attribute and [1] is the character.\n   */\n  this.lines = [];\n  var i = this.rows;\n  while (i--) {\n    this.lines.push(this.blankLine());\n  }\n\n  this.tabs;\n  this.setupStops();\n\n  // Store if user went browsing history in scrollback\n  this.userScrolling = false;\n}\n\ninherits(Terminal, EventEmitter);\n\n/**\n * back_color_erase feature for xterm.\n */\nTerminal.prototype.eraseAttr = function() {\n  // if (this.is('screen')) return this.defAttr;\n  return (this.defAttr & ~0x1ff) | (this.curAttr & 0x1ff);\n};\n\n/**\n * Colors\n */\n\n// Colors 0-15\nTerminal.tangoColors = [\n  // dark:\n  '#2e3436',\n  '#cc0000',\n  '#4e9a06',\n  '#c4a000',\n  '#3465a4',\n  '#75507b',\n  '#06989a',\n  '#d3d7cf',\n  // bright:\n  '#555753',\n  '#ef2929',\n  '#8ae234',\n  '#fce94f',\n  '#729fcf',\n  '#ad7fa8',\n  '#34e2e2',\n  '#eeeeec'\n];\n\n// Colors 0-15 + 16-255\n// Much thanks to TooTallNate for writing this.\nTerminal.colors = (function() {\n  var colors = Terminal.tangoColors.slice()\n  , r = [0x00, 0x5f, 0x87, 0xaf, 0xd7, 0xff]\n  , i;\n\n  // 16-231\n  i = 0;\n  for (; i < 216; i++) {\n    out(r[(i / 36) % 6 | 0], r[(i / 6) % 6 | 0], r[i % 6]);\n  }\n\n  // 232-255 (grey)\n  i = 0;\n  for (; i < 24; i++) {\n    r = 8 + i * 10;\n    out(r, r, r);\n  }\n\n  function out(r, g, b) {\n    colors.push('#' + hex(r) + hex(g) + hex(b));\n  }\n\n  function hex(c) {\n    c = c.toString(16);\n    return c.length < 2 ? '0' + c : c;\n  }\n\n  return colors;\n})();\n\nTerminal._colors = Terminal.colors.slice();\n\nTerminal.vcolors = (function() {\n  var out = []\n  , colors = Terminal.colors\n  , i = 0\n  , color;\n\n  for (; i < 256; i++) {\n    color = parseInt(colors[i].substring(1), 16);\n    out.push([\n      (color >> 16) & 0xff,\n      (color >> 8) & 0xff,\n      color & 0xff\n    ]);\n  }\n\n  return out;\n})();\n\n/**\n * Options\n */\n\nTerminal.defaults = {\n  colors: Terminal.colors,\n  theme: 'default',\n  convertEol: false,\n  termName: 'xterm',\n  geometry: [80, 24],\n  cursorBlink: false,\n  visualBell: false,\n  popOnBell: false,\n  scrollback: 1000,\n  screenKeys: false,\n  debug: false,\n  cancelEvents: false\n  // programFeatures: false,\n  // focusKeys: false,\n};\n\nTerminal.options = {};\n\nTerminal.focus = null;\n\neach(keys(Terminal.defaults), function(key) {\n  Terminal[key] = Terminal.defaults[key];\n  Terminal.options[key] = Terminal.defaults[key];\n});\n\n/**\n * Focus the terminal. Delegates focus handling to the terminal's DOM element.\n */\nTerminal.prototype.focus = function() {\n  return this.textarea.focus();\n};\n\n/**\n * Retrieves an option's value from the terminal.\n * @param {string} key The option key.\n */\nTerminal.prototype.getOption = function(key, value) {\n  if (!(key in Terminal.defaults)) {\n    throw new Error('No option with key \"' + key + '\"');\n  }\n\n  if (typeof this.options[key] !== 'undefined') {\n    return this.options[key];\n  }\n\n  return this[key];\n};\n\n/**\n * Sets an option on the terminal.\n * @param {string} key The option key.\n * @param {string} value The option value.\n */\nTerminal.prototype.setOption = function(key, value) {\n  if (!(key in Terminal.defaults)) {\n    throw new Error('No option with key \"' + key + '\"');\n  }\n  this[key] = value;\n  this.options[key] = value;\n};\n\n/**\n * Binds the desired focus behavior on a given terminal object.\n *\n * @static\n */\nTerminal.bindFocus = function (term) {\n  on(term.textarea, 'focus', function (ev) {\n    if (term.sendFocus) {\n      term.send('\\x1b[I');\n    }\n    term.element.classList.add('focus');\n    term.showCursor();\n    Terminal.focus = term;\n    term.emit('focus', {terminal: term});\n  });\n};\n\n/**\n * Blur the terminal. Delegates blur handling to the terminal's DOM element.\n */\nTerminal.prototype.blur = function() {\n  return this.textarea.blur();\n};\n\n/**\n * Binds the desired blur behavior on a given terminal object.\n *\n * @static\n */\nTerminal.bindBlur = function (term) {\n  on(term.textarea, 'blur', function (ev) {\n    term.refresh(term.y, term.y);\n    if (term.sendFocus) {\n      term.send('\\x1b[O');\n    }\n    term.element.classList.remove('focus');\n    Terminal.focus = null;\n    term.emit('blur', {terminal: term});\n  });\n};\n\n/**\n * Initialize default behavior\n */\nTerminal.prototype.initGlobal = function() {\n  var term = this;\n\n  Terminal.bindKeys(this);\n  Terminal.bindFocus(this);\n  Terminal.bindBlur(this);\n\n  // Bind clipboard functionality\n  on(this.element, 'copy', function (ev) {\n    copyHandler.call(this, ev, term);\n  });\n  on(this.textarea, 'paste', function (ev) {\n    pasteHandler.call(this, ev, term);\n  });\n\n  function rightClickHandlerWrapper (ev) {\n    rightClickHandler.call(this, ev, term);\n  }\n\n  if (term.browser.isFirefox) {\n    on(this.element, 'mousedown', function (ev) {\n      if (ev.button == 2) {\n        rightClickHandlerWrapper(ev);\n      }\n    });\n  } else {\n    on(this.element, 'contextmenu', rightClickHandlerWrapper);\n  }\n};\n\n/**\n * Apply key handling to the terminal\n */\nTerminal.bindKeys = function(term) {\n  on(term.element, 'keydown', function(ev) {\n    if (document.activeElement != this) {\n      return;\n    }\n    term.keyDown(ev);\n  }, true);\n\n  on(term.element, 'keypress', function(ev) {\n    if (document.activeElement != this) {\n      return;\n    }\n    term.keyPress(ev);\n  }, true);\n\n  on(term.element, 'keyup', term.focus.bind(term));\n\n  on(term.textarea, 'keydown', function(ev) {\n    term.keyDown(ev);\n  }, true);\n\n  on(term.textarea, 'keypress', function(ev) {\n    term.keyPress(ev);\n    // Truncate the textarea's value, since it is not needed\n    this.value = '';\n  }, true);\n\n  on(term.textarea, 'compositionstart', term.compositionHelper.compositionstart.bind(term.compositionHelper));\n  on(term.textarea, 'compositionupdate', term.compositionHelper.compositionupdate.bind(term.compositionHelper));\n  on(term.textarea, 'compositionend', term.compositionHelper.compositionend.bind(term.compositionHelper));\n  term.on('refresh', term.compositionHelper.updateCompositionElements.bind(term.compositionHelper));\n};\n\n\n/**\n * Insert the given row to the terminal or produce a new one\n * if no row argument is passed. Return the inserted row.\n * @param {HTMLElement} row (optional) The row to append to the terminal.\n */\nTerminal.prototype.insertRow = function (row) {\n  if (typeof row != 'object') {\n    row = document.createElement('div');\n  }\n\n  this.rowContainer.appendChild(row);\n  this.children.push(row);\n\n  return row;\n};\n\n/**\n * Opens the terminal within an element.\n *\n * @param {HTMLElement} parent The element to create the terminal within.\n */\nTerminal.prototype.open = function(parent) {\n  var self=this, i=0, div;\n\n  this.parent = parent || this.parent;\n\n  if (!this.parent) {\n    throw new Error('Terminal requires a parent element.');\n  }\n\n  // Grab global elements\n  this.context = this.parent.ownerDocument.defaultView;\n  this.document = this.parent.ownerDocument;\n  this.body = this.document.getElementsByTagName('body')[0];\n\n  //Create main element container\n  this.element = this.document.createElement('div');\n  this.element.classList.add('terminal');\n  this.element.classList.add('xterm');\n  this.element.classList.add('xterm-theme-' + this.theme);\n\n  this.element.style.height\n  this.element.setAttribute('tabindex', 0);\n\n  this.viewportElement = document.createElement('div');\n  this.viewportElement.classList.add('xterm-viewport');\n  this.element.appendChild(this.viewportElement);\n  this.viewportScrollArea = document.createElement('div');\n  this.viewportScrollArea.classList.add('xterm-scroll-area');\n  this.viewportElement.appendChild(this.viewportScrollArea);\n\n  // Create the container that will hold the lines of the terminal and then\n  // produce the lines the lines.\n  this.rowContainer = document.createElement('div');\n  this.rowContainer.classList.add('xterm-rows');\n  this.element.appendChild(this.rowContainer);\n  this.children = [];\n\n  // Create the container that will hold helpers like the textarea for\n  // capturing DOM Events. Then produce the helpers.\n  this.helperContainer = document.createElement('div');\n  this.helperContainer.classList.add('xterm-helpers');\n  // TODO: This should probably be inserted once it's filled to prevent an additional layout\n  this.element.appendChild(this.helperContainer);\n  this.textarea = document.createElement('textarea');\n  this.textarea.classList.add('xterm-helper-textarea');\n  this.textarea.setAttribute('autocorrect', 'off');\n  this.textarea.setAttribute('autocapitalize', 'off');\n  this.textarea.setAttribute('spellcheck', 'false');\n  this.textarea.tabIndex = 0;\n  this.textarea.addEventListener('focus', function() {\n    self.emit('focus', {terminal: self});\n  });\n  this.textarea.addEventListener('blur', function() {\n    self.emit('blur', {terminal: self});\n  });\n  this.helperContainer.appendChild(this.textarea);\n\n  this.compositionView = document.createElement('div');\n  this.compositionView.classList.add('composition-view');\n  this.compositionHelper = new CompositionHelper(this.textarea, this.compositionView, this);\n  this.helperContainer.appendChild(this.compositionView);\n\n  this.charMeasureElement = document.createElement('div');\n  this.charMeasureElement.classList.add('xterm-char-measure-element');\n  this.charMeasureElement.innerHTML = 'W';\n  this.helperContainer.appendChild(this.charMeasureElement);\n\n  for (; i < this.rows; i++) {\n    this.insertRow();\n  }\n  this.parent.appendChild(this.element);\n\n  this.viewport = new Viewport(this, this.viewportElement, this.viewportScrollArea, this.charMeasureElement);\n\n  // Draw the screen.\n  this.refresh(0, this.rows - 1);\n\n  // Initialize global actions that\n  // need to be taken on the document.\n  this.initGlobal();\n\n  // Ensure there is a Terminal.focus.\n  this.focus();\n\n  on(this.element, 'click', function() {\n    var selection = document.getSelection(),\n        collapsed = selection.isCollapsed,\n        isRange = typeof collapsed == 'boolean' ? !collapsed : selection.type == 'Range';\n    if (!isRange) {\n      self.focus();\n    }\n  });\n\n  // Listen for mouse events and translate\n  // them into terminal mouse protocols.\n  this.bindMouse();\n\n  // Figure out whether boldness affects\n  // the character width of monospace fonts.\n  if (Terminal.brokenBold == null) {\n    Terminal.brokenBold = isBoldBroken(this.document);\n  }\n\n  this.emit('open');\n};\n\n\n/**\n * Attempts to load an add-on using CommonJS or RequireJS (whichever is available).\n * @param {string} addon The name of the addon to load\n * @static\n */\nTerminal.loadAddon = function(addon, callback) {\n  if (typeof exports === 'object' && typeof module === 'object') {\n    // CommonJS\n    return require('../addons/' + addon);\n  } else if (typeof define == 'function') {\n    // RequireJS\n    return require(['../addons/' + addon + '/' + addon], callback);\n  } else {\n    console.error('Cannot load a module without a CommonJS or RequireJS environment.');\n    return false;\n  }\n};\n\n\n/**\n * XTerm mouse events\n * http://invisible-island.net/xterm/ctlseqs/ctlseqs.html#Mouse%20Tracking\n * To better understand these\n * the xterm code is very helpful:\n * Relevant files:\n *   button.c, charproc.c, misc.c\n * Relevant functions in xterm/button.c:\n *   BtnCode, EmitButtonCode, EditorButton, SendMousePosition\n */\nTerminal.prototype.bindMouse = function() {\n  var el = this.element, self = this, pressed = 32;\n\n  // mouseup, mousedown, wheel\n  // left click: ^[[M 3<^[[M#3<\n  // wheel up: ^[[M`3>\n  function sendButton(ev) {\n    var button\n    , pos;\n\n    // get the xterm-style button\n    button = getButton(ev);\n\n    // get mouse coordinates\n    pos = getCoords(ev);\n    if (!pos) return;\n\n    sendEvent(button, pos);\n\n    switch (ev.overrideType || ev.type) {\n      case 'mousedown':\n        pressed = button;\n        break;\n      case 'mouseup':\n        // keep it at the left\n        // button, just in case.\n        pressed = 32;\n        break;\n      case 'wheel':\n        // nothing. don't\n        // interfere with\n        // `pressed`.\n        break;\n    }\n  }\n\n  // motion example of a left click:\n  // ^[[M 3<^[[M@4<^[[M@5<^[[M@6<^[[M@7<^[[M#7<\n  function sendMove(ev) {\n    var button = pressed\n    , pos;\n\n    pos = getCoords(ev);\n    if (!pos) return;\n\n    // buttons marked as motions\n    // are incremented by 32\n    button += 32;\n\n    sendEvent(button, pos);\n  }\n\n  // encode button and\n  // position to characters\n  function encode(data, ch) {\n    if (!self.utfMouse) {\n      if (ch === 255) return data.push(0);\n      if (ch > 127) ch = 127;\n      data.push(ch);\n    } else {\n      if (ch === 2047) return data.push(0);\n      if (ch < 127) {\n        data.push(ch);\n      } else {\n        if (ch > 2047) ch = 2047;\n        data.push(0xC0 | (ch >> 6));\n        data.push(0x80 | (ch & 0x3F));\n      }\n    }\n  }\n\n  // send a mouse event:\n  // regular/utf8: ^[[M Cb Cx Cy\n  // urxvt: ^[[ Cb ; Cx ; Cy M\n  // sgr: ^[[ Cb ; Cx ; Cy M/m\n  // vt300: ^[[ 24(1/3/5)~ [ Cx , Cy ] \\r\n  // locator: CSI P e ; P b ; P r ; P c ; P p & w\n  function sendEvent(button, pos) {\n    // self.emit('mouse', {\n    //   x: pos.x - 32,\n    //   y: pos.x - 32,\n    //   button: button\n    // });\n\n    if (self.vt300Mouse) {\n      // NOTE: Unstable.\n      // http://www.vt100.net/docs/vt3xx-gp/chapter15.html\n      button &= 3;\n      pos.x -= 32;\n      pos.y -= 32;\n      var data = '\\x1b[24';\n      if (button === 0) data += '1';\n      else if (button === 1) data += '3';\n      else if (button === 2) data += '5';\n      else if (button === 3) return;\n      else data += '0';\n      data += '~[' + pos.x + ',' + pos.y + ']\\r';\n      self.send(data);\n      return;\n    }\n\n    if (self.decLocator) {\n      // NOTE: Unstable.\n      button &= 3;\n      pos.x -= 32;\n      pos.y -= 32;\n      if (button === 0) button = 2;\n      else if (button === 1) button = 4;\n      else if (button === 2) button = 6;\n      else if (button === 3) button = 3;\n      self.send('\\x1b['\n                + button\n                + ';'\n                + (button === 3 ? 4 : 0)\n                + ';'\n                + pos.y\n                + ';'\n                + pos.x\n                + ';'\n                + (pos.page || 0)\n                + '&w');\n      return;\n    }\n\n    if (self.urxvtMouse) {\n      pos.x -= 32;\n      pos.y -= 32;\n      pos.x++;\n      pos.y++;\n      self.send('\\x1b[' + button + ';' + pos.x + ';' + pos.y + 'M');\n      return;\n    }\n\n    if (self.sgrMouse) {\n      pos.x -= 32;\n      pos.y -= 32;\n      self.send('\\x1b[<'\n                + ((button & 3) === 3 ? button & ~3 : button)\n                + ';'\n                + pos.x\n                + ';'\n                + pos.y\n                + ((button & 3) === 3 ? 'm' : 'M'));\n      return;\n    }\n\n    var data = [];\n\n    encode(data, button);\n    encode(data, pos.x);\n    encode(data, pos.y);\n\n    self.send('\\x1b[M' + String.fromCharCode.apply(String, data));\n  }\n\n  function getButton(ev) {\n    var button\n    , shift\n    , meta\n    , ctrl\n    , mod;\n\n    // two low bits:\n    // 0 = left\n    // 1 = middle\n    // 2 = right\n    // 3 = release\n    // wheel up/down:\n    // 1, and 2 - with 64 added\n    switch (ev.overrideType || ev.type) {\n      case 'mousedown':\n        button = ev.button != null\n          ? +ev.button\n        : ev.which != null\n          ? ev.which - 1\n        : null;\n\n        if (self.browser.isMSIE) {\n          button = button === 1 ? 0 : button === 4 ? 1 : button;\n        }\n        break;\n      case 'mouseup':\n        button = 3;\n        break;\n      case 'DOMMouseScroll':\n        button = ev.detail < 0\n          ? 64\n        : 65;\n        break;\n      case 'wheel':\n        button = ev.wheelDeltaY > 0\n          ? 64\n        : 65;\n        break;\n    }\n\n    // next three bits are the modifiers:\n    // 4 = shift, 8 = meta, 16 = control\n    shift = ev.shiftKey ? 4 : 0;\n    meta = ev.metaKey ? 8 : 0;\n    ctrl = ev.ctrlKey ? 16 : 0;\n    mod = shift | meta | ctrl;\n\n    // no mods\n    if (self.vt200Mouse) {\n      // ctrl only\n      mod &= ctrl;\n    } else if (!self.normalMouse) {\n      mod = 0;\n    }\n\n    // increment to SP\n    button = (32 + (mod << 2)) + button;\n\n    return button;\n  }\n\n  // mouse coordinates measured in cols/rows\n  function getCoords(ev) {\n    var x, y, w, h, el;\n\n    // ignore browsers without pageX for now\n    if (ev.pageX == null) return;\n\n    x = ev.pageX;\n    y = ev.pageY;\n    el = self.element;\n\n    // should probably check offsetParent\n    // but this is more portable\n    while (el && el !== self.document.documentElement) {\n      x -= el.offsetLeft;\n      y -= el.offsetTop;\n      el = 'offsetParent' in el\n        ? el.offsetParent\n      : el.parentNode;\n    }\n\n    // convert to cols/rows\n    w = self.element.clientWidth;\n    h = self.element.clientHeight;\n    x = Math.ceil((x / w) * self.cols);\n    y = Math.ceil((y / h) * self.rows);\n\n    // be sure to avoid sending\n    // bad positions to the program\n    if (x < 0) x = 0;\n    if (x > self.cols) x = self.cols;\n    if (y < 0) y = 0;\n    if (y > self.rows) y = self.rows;\n\n    // xterm sends raw bytes and\n    // starts at 32 (SP) for each.\n    x += 32;\n    y += 32;\n\n    return {\n      x: x,\n      y: y,\n      type: 'wheel'\n    };\n  }\n\n  on(el, 'mousedown', function(ev) {\n    if (!self.mouseEvents) return;\n\n    // send the button\n    sendButton(ev);\n\n    // ensure focus\n    self.focus();\n\n    // fix for odd bug\n    //if (self.vt200Mouse && !self.normalMouse) {\n    if (self.vt200Mouse) {\n      ev.overrideType = 'mouseup';\n      sendButton(ev);\n      return self.cancel(ev);\n    }\n\n    // bind events\n    if (self.normalMouse) on(self.document, 'mousemove', sendMove);\n\n    // x10 compatibility mode can't send button releases\n    if (!self.x10Mouse) {\n      on(self.document, 'mouseup', function up(ev) {\n        sendButton(ev);\n        if (self.normalMouse) off(self.document, 'mousemove', sendMove);\n        off(self.document, 'mouseup', up);\n        return self.cancel(ev);\n      });\n    }\n\n    return self.cancel(ev);\n  });\n\n  //if (self.normalMouse) {\n  //  on(self.document, 'mousemove', sendMove);\n  //}\n\n  on(el, 'wheel', function(ev) {\n    if (!self.mouseEvents) return;\n    if (self.x10Mouse\n        || self.vt300Mouse\n        || self.decLocator) return;\n    sendButton(ev);\n    return self.cancel(ev);\n  });\n\n  // allow wheel scrolling in\n  // the shell for example\n  on(el, 'wheel', function(ev) {\n    if (self.mouseEvents) return;\n    self.viewport.onWheel(ev);\n    return self.cancel(ev);\n  });\n};\n\n/**\n * Destroys the terminal.\n */\nTerminal.prototype.destroy = function() {\n  this.readable = false;\n  this.writable = false;\n  this._events = {};\n  this.handler = function() {};\n  this.write = function() {};\n  if (this.element.parentNode) {\n    this.element.parentNode.removeChild(this.element);\n  }\n  //this.emit('close');\n};\n\n\n/**\n * Flags used to render terminal text properly\n */\nTerminal.flags = {\n  BOLD: 1,\n  UNDERLINE: 2,\n  BLINK: 4,\n  INVERSE: 8,\n  INVISIBLE: 16\n}\n\n/**\n * Refreshes (re-renders) terminal content within two rows (inclusive)\n *\n * Rendering Engine:\n *\n * In the screen buffer, each character is stored as a an array with a character\n * and a 32-bit integer:\n *   - First value: a utf-16 character.\n *   - Second value:\n *   - Next 9 bits: background color (0-511).\n *   - Next 9 bits: foreground color (0-511).\n *   - Next 14 bits: a mask for misc. flags:\n *     - 1=bold\n *     - 2=underline\n *     - 4=blink\n *     - 8=inverse\n *     - 16=invisible\n *\n * @param {number} start The row to start from (between 0 and terminal's height terminal - 1)\n * @param {number} end The row to end at (between fromRow and terminal's height terminal - 1)\n * @param {boolean} queue Whether the refresh should ran right now or be queued\n */\nTerminal.prototype.refresh = function(start, end, queue) {\n  var self = this;\n\n  // queue defaults to true\n  queue = (typeof queue == 'undefined') ? true : queue;\n\n  /**\n   * The refresh queue allows refresh to execute only approximately 30 times a second. For\n   * commands that pass a significant amount of output to the write function, this prevents the\n   * terminal from maxing out the CPU and making the UI unresponsive. While commands can still\n   * run beyond what they do on the terminal, it is far better with a debounce in place as\n   * every single terminal manipulation does not need to be constructed in the DOM.\n   *\n   * A side-effect of this is that it makes ^C to interrupt a process seem more responsive.\n   */\n  if (queue) {\n    // If refresh should be queued, order the refresh and return.\n    if (this._refreshIsQueued) {\n      // If a refresh has already been queued, just order a full refresh next\n      this._fullRefreshNext = true;\n    } else {\n      setTimeout(function () {\n        self.refresh(start, end, false);\n      }, 34)\n      this._refreshIsQueued = true;\n    }\n    return;\n  }\n\n  // If refresh should be run right now (not be queued), release the lock\n  this._refreshIsQueued = false;\n\n  // If multiple refreshes were requested, make a full refresh.\n  if (this._fullRefreshNext) {\n    start = 0;\n    end = this.rows - 1;\n    this._fullRefreshNext = false // reset lock\n  }\n\n  var x, y, i, line, out, ch, ch_width, width, data, attr, bg, fg, flags, row, parent, focused = document.activeElement;\n\n  // If this is a big refresh, remove the terminal rows from the DOM for faster calculations\n  if (end - start >= this.rows / 2) {\n    parent = this.element.parentNode;\n    if (parent) {\n      this.element.removeChild(this.rowContainer);\n    }\n  }\n\n  width = this.cols;\n  y = start;\n\n  if (end >= this.rows.length) {\n    this.log('`end` is too large. Most likely a bad CSR.');\n    end = this.rows.length - 1;\n  }\n\n  for (; y <= end; y++) {\n    row = y + this.ydisp;\n\n    line = this.lines[row];\n    out = '';\n\n    if (this.y === y - (this.ybase - this.ydisp)\n        && this.cursorState\n        && !this.cursorHidden) {\n      x = this.x;\n    } else {\n      x = -1;\n    }\n\n    attr = this.defAttr;\n    i = 0;\n\n    for (; i < width; i++) {\n      data = line[i][0];\n      ch = line[i][1];\n      ch_width = line[i][2];\n      if (!ch_width)\n        continue;\n\n      if (i === x) data = -1;\n\n      if (data !== attr) {\n        if (attr !== this.defAttr) {\n          out += '</span>';\n        }\n        if (data !== this.defAttr) {\n          if (data === -1) {\n            out += '<span class=\"reverse-video terminal-cursor';\n            if (this.cursorBlink) {\n              out += ' blinking';\n            }\n            out += '\">';\n          } else {\n            var classNames = [];\n\n            bg = data & 0x1ff;\n            fg = (data >> 9) & 0x1ff;\n            flags = data >> 18;\n\n            if (flags & Terminal.flags.BOLD) {\n              if (!Terminal.brokenBold) {\n                classNames.push('xterm-bold');\n              }\n              // See: XTerm*boldColors\n              if (fg < 8) fg += 8;\n            }\n\n            if (flags & Terminal.flags.UNDERLINE) {\n              classNames.push('xterm-underline');\n            }\n\n            if (flags & Terminal.flags.BLINK) {\n              classNames.push('xterm-blink');\n            }\n\n            // If inverse flag is on, then swap the foreground and background variables.\n            if (flags & Terminal.flags.INVERSE) {\n              /* One-line variable swap in JavaScript: http://stackoverflow.com/a/16201730 */\n              bg = [fg, fg = bg][0];\n              // Should inverse just be before the\n              // above boldColors effect instead?\n              if ((flags & 1) && fg < 8) fg += 8;\n            }\n\n            if (flags & Terminal.flags.INVISIBLE) {\n              classNames.push('xterm-hidden');\n            }\n\n            /**\n             * Weird situation: Invert flag used black foreground and white background results\n             * in invalid background color, positioned at the 256 index of the 256 terminal\n             * color map. Pin the colors manually in such a case.\n             *\n             * Source: https://github.com/sourcelair/xterm.js/issues/57\n             */\n            if (flags & Terminal.flags.INVERSE) {\n              if (bg == 257) {\n                bg = 15;\n              }\n              if (fg == 256) {\n                fg = 0;\n              }\n            }\n\n            if (bg < 256) {\n              classNames.push('xterm-bg-color-' + bg);\n            }\n\n            if (fg < 256) {\n              classNames.push('xterm-color-' + fg);\n            }\n\n            out += '<span';\n            if (classNames.length) {\n              out += ' class=\"' + classNames.join(' ') + '\"';\n            }\n            out += '>';\n          }\n        }\n      }\n\n      switch (ch) {\n        case '&':\n          out += '&amp;';\n          break;\n        case '<':\n          out += '&lt;';\n          break;\n        case '>':\n          out += '&gt;';\n          break;\n        default:\n          if (ch <= ' ') {\n            out += '&nbsp;';\n          } else {\n            out += ch;\n          }\n          break;\n      }\n\n      attr = data;\n    }\n\n    if (attr !== this.defAttr) {\n      out += '</span>';\n    }\n\n    this.children[y].innerHTML = out;\n  }\n\n  if (parent) {\n    this.element.appendChild(this.rowContainer);\n  }\n\n  this.emit('refresh', {element: this.element, start: start, end: end});\n};\n\n/**\n * Display the cursor element\n */\nTerminal.prototype.showCursor = function() {\n  if (!this.cursorState) {\n    this.cursorState = 1;\n    this.refresh(this.y, this.y);\n  }\n};\n\n/**\n * Scroll the terminal\n */\nTerminal.prototype.scroll = function() {\n  var row;\n\n  if (++this.ybase === this.scrollback) {\n    this.ybase = this.ybase / 2 | 0;\n    this.lines = this.lines.slice(-(this.ybase + this.rows) + 1);\n  }\n\n  if (!this.userScrolling) {\n    this.ydisp = this.ybase;\n  }\n\n  // last line\n  row = this.ybase + this.rows - 1;\n\n  // subtract the bottom scroll region\n  row -= this.rows - 1 - this.scrollBottom;\n\n  if (row === this.lines.length) {\n    // potential optimization:\n    // pushing is faster than splicing\n    // when they amount to the same\n    // behavior.\n    this.lines.push(this.blankLine());\n  } else {\n    // add our new line\n    this.lines.splice(row, 0, this.blankLine());\n  }\n\n  if (this.scrollTop !== 0) {\n    if (this.ybase !== 0) {\n      this.ybase--;\n      if (!this.userScrolling) {\n        this.ydisp = this.ybase;\n      }\n    }\n    this.lines.splice(this.ybase + this.scrollTop, 1);\n  }\n\n  // this.maxRange();\n  this.updateRange(this.scrollTop);\n  this.updateRange(this.scrollBottom);\n\n  this.emit('scroll', this.ydisp);\n};\n\n/**\n * Scroll the display of the terminal\n * @param {number} disp The number of lines to scroll down (negatives scroll up).\n * @param {boolean} suppressScrollEvent Don't emit the scroll event as scrollDisp. This is used\n * to avoid unwanted events being handled by the veiwport when the event was triggered from the\n * viewport originally.\n */\nTerminal.prototype.scrollDisp = function(disp, suppressScrollEvent) {\n  if (disp < 0) {\n    this.userScrolling = true;\n  } else if (disp + this.ydisp >= this.ybase) {\n    this.userScrolling = false;\n  }\n\n  this.ydisp += disp;\n\n  if (this.ydisp > this.ybase) {\n    this.ydisp = this.ybase;\n  } else if (this.ydisp < 0) {\n    this.ydisp = 0;\n  }\n\n  if (!suppressScrollEvent) {\n    this.emit('scroll', this.ydisp);\n  }\n\n  this.refresh(0, this.rows - 1);\n};\n\n/**\n * Scroll the display of the terminal by a number of pages.\n * @param {number} pageCount The number of pages to scroll (negative scrolls up).\n */\nTerminal.prototype.scrollPages = function(pageCount) {\n  this.scrollDisp(pageCount * (this.rows - 1));\n}\n\n/**\n * Scrolls the display of the terminal to the top.\n */\nTerminal.prototype.scrollToTop = function() {\n  this.scrollDisp(-this.ydisp);\n}\n\n/**\n * Scrolls the display of the terminal to the bottom.\n */\nTerminal.prototype.scrollToBottom = function() {\n  this.scrollDisp(this.ybase - this.ydisp);\n}\n\n/**\n * Writes text to the terminal.\n * @param {string} text The text to write to the terminal.\n */\nTerminal.prototype.write = function(data) {\n  var l = data.length, i = 0, j, cs, ch, code, low, ch_width, row;\n\n  this.refreshStart = this.y;\n  this.refreshEnd = this.y;\n\n  // apply leftover surrogate high from last write\n  if (this.surrogate_high) {\n    data = this.surrogate_high + data;\n    this.surrogate_high = '';\n  }\n\n  for (; i < l; i++) {\n    ch = data[i];\n\n    // FIXME: higher chars than 0xa0 are not allowed in escape sequences\n    //        --> maybe move to default\n    code = data.charCodeAt(i);\n    if (0xD800 <= code && code <= 0xDBFF) {\n      // we got a surrogate high\n      // get surrogate low (next 2 bytes)\n      low = data.charCodeAt(i+1);\n      if (isNaN(low)) {\n        // end of data stream, save surrogate high\n        this.surrogate_high = ch;\n        continue;\n      }\n      code = ((code - 0xD800) * 0x400) + (low - 0xDC00) + 0x10000;\n      ch += data.charAt(i+1);\n    }\n    // surrogate low - already handled above\n    if (0xDC00 <= code && code <= 0xDFFF)\n      continue;\n\n    switch (this.state) {\n      case normal:\n        switch (ch) {\n          case '\\x07':\n            this.bell();\n            break;\n\n          // '\\n', '\\v', '\\f'\n          case '\\n':\n          case '\\x0b':\n          case '\\x0c':\n            if (this.convertEol) {\n              this.x = 0;\n            }\n            this.y++;\n            if (this.y > this.scrollBottom) {\n              this.y--;\n              this.scroll();\n            }\n            break;\n\n          // '\\r'\n          case '\\r':\n            this.x = 0;\n            break;\n\n          // '\\b'\n          case '\\x08':\n            if (this.x > 0) {\n              this.x--;\n            }\n            break;\n\n          // '\\t'\n          case '\\t':\n            this.x = this.nextStop();\n            break;\n\n          // shift out\n          case '\\x0e':\n            this.setgLevel(1);\n            break;\n\n          // shift in\n          case '\\x0f':\n            this.setgLevel(0);\n            break;\n\n          // '\\e'\n          case '\\x1b':\n            this.state = escaped;\n            break;\n\n          default:\n            // ' '\n            // calculate print space\n            // expensive call, therefore we save width in line buffer\n            ch_width = wcwidth(code);\n\n            if (ch >= ' ') {\n              if (this.charset && this.charset[ch]) {\n                ch = this.charset[ch];\n              }\n\n              row = this.y + this.ybase;\n\n              // insert combining char in last cell\n              // FIXME: needs handling after cursor jumps\n              if (!ch_width && this.x) {\n\n                // dont overflow left\n                if (this.lines[row][this.x-1]) {\n                  if (!this.lines[row][this.x-1][2]) {\n\n                    // found empty cell after fullwidth, need to go 2 cells back\n                    if (this.lines[row][this.x-2])\n                      this.lines[row][this.x-2][1] += ch;\n\n                  } else {\n                    this.lines[row][this.x-1][1] += ch;\n                  }\n                  this.updateRange(this.y);\n                }\n                break;\n              }\n\n              // goto next line if ch would overflow\n              // TODO: needs a global min terminal width of 2\n              if (this.x+ch_width-1 >= this.cols) {\n                // autowrap - DECAWM\n                if (this.wraparoundMode) {\n                  this.x = 0;\n                  this.y++;\n                  if (this.y > this.scrollBottom) {\n                    this.y--;\n                    this.scroll();\n                  }\n                } else {\n                  this.x = this.cols-1;\n                  if(ch_width===2)  // FIXME: check for xterm behavior\n                    continue;\n                }\n              }\n              row = this.y + this.ybase;\n\n              // insert mode: move characters to right\n              if (this.insertMode) {\n                // do this twice for a fullwidth char\n                for (var moves=0; moves<ch_width; ++moves) {\n                  // remove last cell, if it's width is 0\n                  // we have to adjust the second last cell as well\n                  var removed = this.lines[this.y + this.ybase].pop();\n                  if (removed[2]===0\n                      && this.lines[row][this.cols-2]\n                      && this.lines[row][this.cols-2][2]===2)\n                    this.lines[row][this.cols-2] = [this.curAttr, ' ', 1];\n\n                  // insert empty cell at cursor\n                  this.lines[row].splice(this.x, 0, [this.curAttr, ' ', 1]);\n                }\n              }\n\n              this.lines[row][this.x] = [this.curAttr, ch, ch_width];\n              this.x++;\n              this.updateRange(this.y);\n\n              // fullwidth char - set next cell width to zero and advance cursor\n              if (ch_width===2) {\n                this.lines[row][this.x] = [this.curAttr, '', 0];\n                this.x++;\n              }\n            }\n            break;\n        }\n        break;\n      case escaped:\n        switch (ch) {\n          // ESC [ Control Sequence Introducer ( CSI is 0x9b).\n          case '[':\n            this.params = [];\n            this.currentParam = 0;\n            this.state = csi;\n            break;\n\n          // ESC ] Operating System Command ( OSC is 0x9d).\n          case ']':\n            this.params = [];\n            this.currentParam = 0;\n            this.state = osc;\n            break;\n\n          // ESC P Device Control String ( DCS is 0x90).\n          case 'P':\n            this.params = [];\n            this.currentParam = 0;\n            this.state = dcs;\n            break;\n\n          // ESC _ Application Program Command ( APC is 0x9f).\n          case '_':\n            this.state = ignore;\n            break;\n\n          // ESC ^ Privacy Message ( PM is 0x9e).\n          case '^':\n            this.state = ignore;\n            break;\n\n          // ESC c Full Reset (RIS).\n          case 'c':\n            this.reset();\n            break;\n\n          // ESC E Next Line ( NEL is 0x85).\n          // ESC D Index ( IND is 0x84).\n          case 'E':\n            this.x = 0;\n            ;\n          case 'D':\n            this.index();\n            break;\n\n          // ESC M Reverse Index ( RI is 0x8d).\n          case 'M':\n            this.reverseIndex();\n            break;\n\n          // ESC % Select default/utf-8 character set.\n          // @ = default, G = utf-8\n          case '%':\n            //this.charset = null;\n            this.setgLevel(0);\n            this.setgCharset(0, Terminal.charsets.US);\n            this.state = normal;\n            i++;\n            break;\n\n          // ESC (,),*,+,-,. Designate G0-G2 Character Set.\n          case '(': // <-- this seems to get all the attention\n          case ')':\n          case '*':\n          case '+':\n          case '-':\n          case '.':\n            switch (ch) {\n              case '(':\n                this.gcharset = 0;\n                break;\n              case ')':\n                this.gcharset = 1;\n                break;\n              case '*':\n                this.gcharset = 2;\n                break;\n              case '+':\n                this.gcharset = 3;\n                break;\n              case '-':\n                this.gcharset = 1;\n                break;\n              case '.':\n                this.gcharset = 2;\n                break;\n            }\n            this.state = charset;\n            break;\n\n          // Designate G3 Character Set (VT300).\n          // A = ISO Latin-1 Supplemental.\n          // Not implemented.\n          case '/':\n            this.gcharset = 3;\n            this.state = charset;\n            i--;\n            break;\n\n          // ESC N\n          // Single Shift Select of G2 Character Set\n          // ( SS2 is 0x8e). This affects next character only.\n          case 'N':\n            break;\n          // ESC O\n          // Single Shift Select of G3 Character Set\n          // ( SS3 is 0x8f). This affects next character only.\n          case 'O':\n            break;\n          // ESC n\n          // Invoke the G2 Character Set as GL (LS2).\n          case 'n':\n            this.setgLevel(2);\n            break;\n          // ESC o\n          // Invoke the G3 Character Set as GL (LS3).\n          case 'o':\n            this.setgLevel(3);\n            break;\n          // ESC |\n          // Invoke the G3 Character Set as GR (LS3R).\n          case '|':\n            this.setgLevel(3);\n            break;\n          // ESC }\n          // Invoke the G2 Character Set as GR (LS2R).\n          case '}':\n            this.setgLevel(2);\n            break;\n          // ESC ~\n          // Invoke the G1 Character Set as GR (LS1R).\n          case '~':\n            this.setgLevel(1);\n            break;\n\n          // ESC 7 Save Cursor (DECSC).\n          case '7':\n            this.saveCursor();\n            this.state = normal;\n            break;\n\n          // ESC 8 Restore Cursor (DECRC).\n          case '8':\n            this.restoreCursor();\n            this.state = normal;\n            break;\n\n          // ESC # 3 DEC line height/width\n          case '#':\n            this.state = normal;\n            i++;\n            break;\n\n          // ESC H Tab Set (HTS is 0x88).\n          case 'H':\n            this.tabSet();\n            break;\n\n          // ESC = Application Keypad (DECKPAM).\n          case '=':\n            this.log('Serial port requested application keypad.');\n            this.applicationKeypad = true;\n            this.viewport.syncScrollArea();\n            this.state = normal;\n            break;\n\n          // ESC > Normal Keypad (DECKPNM).\n          case '>':\n            this.log('Switching back to normal keypad.');\n            this.applicationKeypad = false;\n            this.viewport.syncScrollArea();\n            this.state = normal;\n            break;\n\n          default:\n            this.state = normal;\n            this.error('Unknown ESC control: %s.', ch);\n            break;\n        }\n        break;\n\n      case charset:\n        switch (ch) {\n          case '0': // DEC Special Character and Line Drawing Set.\n            cs = Terminal.charsets.SCLD;\n            break;\n          case 'A': // UK\n            cs = Terminal.charsets.UK;\n            break;\n          case 'B': // United States (USASCII).\n            cs = Terminal.charsets.US;\n            break;\n          case '4': // Dutch\n            cs = Terminal.charsets.Dutch;\n            break;\n          case 'C': // Finnish\n          case '5':\n            cs = Terminal.charsets.Finnish;\n            break;\n          case 'R': // French\n            cs = Terminal.charsets.French;\n            break;\n          case 'Q': // FrenchCanadian\n            cs = Terminal.charsets.FrenchCanadian;\n            break;\n          case 'K': // German\n            cs = Terminal.charsets.German;\n            break;\n          case 'Y': // Italian\n            cs = Terminal.charsets.Italian;\n            break;\n          case 'E': // NorwegianDanish\n          case '6':\n            cs = Terminal.charsets.NorwegianDanish;\n            break;\n          case 'Z': // Spanish\n            cs = Terminal.charsets.Spanish;\n            break;\n          case 'H': // Swedish\n          case '7':\n            cs = Terminal.charsets.Swedish;\n            break;\n          case '=': // Swiss\n            cs = Terminal.charsets.Swiss;\n            break;\n          case '/': // ISOLatin (actually /A)\n            cs = Terminal.charsets.ISOLatin;\n            i++;\n            break;\n          default: // Default\n            cs = Terminal.charsets.US;\n            break;\n        }\n        this.setgCharset(this.gcharset, cs);\n        this.gcharset = null;\n        this.state = normal;\n        break;\n\n      case osc:\n        // OSC Ps ; Pt ST\n        // OSC Ps ; Pt BEL\n        //   Set Text Parameters.\n        if (ch === '\\x1b' || ch === '\\x07') {\n          if (ch === '\\x1b') i++;\n\n          this.params.push(this.currentParam);\n\n          switch (this.params[0]) {\n            case 0:\n            case 1:\n            case 2:\n              if (this.params[1]) {\n                this.title = this.params[1];\n                this.handleTitle(this.title);\n              }\n              break;\n            case 3:\n              // set X property\n              break;\n            case 4:\n            case 5:\n              // change dynamic colors\n              break;\n            case 10:\n            case 11:\n            case 12:\n            case 13:\n            case 14:\n            case 15:\n            case 16:\n            case 17:\n            case 18:\n            case 19:\n              // change dynamic ui colors\n              break;\n            case 46:\n              // change log file\n              break;\n            case 50:\n              // dynamic font\n              break;\n            case 51:\n              // emacs shell\n              break;\n            case 52:\n              // manipulate selection data\n              break;\n            case 104:\n            case 105:\n            case 110:\n            case 111:\n            case 112:\n            case 113:\n            case 114:\n            case 115:\n            case 116:\n            case 117:\n            case 118:\n              // reset colors\n              break;\n          }\n\n          this.params = [];\n          this.currentParam = 0;\n          this.state = normal;\n        } else {\n          if (!this.params.length) {\n            if (ch >= '0' && ch <= '9') {\n              this.currentParam =\n                this.currentParam * 10 + ch.charCodeAt(0) - 48;\n            } else if (ch === ';') {\n              this.params.push(this.currentParam);\n              this.currentParam = '';\n            }\n          } else {\n            this.currentParam += ch;\n          }\n        }\n        break;\n\n      case csi:\n        // '?', '>', '!'\n        if (ch === '?' || ch === '>' || ch === '!') {\n          this.prefix = ch;\n          break;\n        }\n\n        // 0 - 9\n        if (ch >= '0' && ch <= '9') {\n          this.currentParam = this.currentParam * 10 + ch.charCodeAt(0) - 48;\n          break;\n        }\n\n        // '$', '\"', ' ', '\\''\n        if (ch === '$' || ch === '\"' || ch === ' ' || ch === '\\'') {\n          this.postfix = ch;\n          break;\n        }\n\n        this.params.push(this.currentParam);\n        this.currentParam = 0;\n\n        // ';'\n        if (ch === ';') break;\n\n        this.state = normal;\n\n        switch (ch) {\n          // CSI Ps A\n          // Cursor Up Ps Times (default = 1) (CUU).\n          case 'A':\n            this.cursorUp(this.params);\n            break;\n\n          // CSI Ps B\n          // Cursor Down Ps Times (default = 1) (CUD).\n          case 'B':\n            this.cursorDown(this.params);\n            break;\n\n          // CSI Ps C\n          // Cursor Forward Ps Times (default = 1) (CUF).\n          case 'C':\n            this.cursorForward(this.params);\n            break;\n\n          // CSI Ps D\n          // Cursor Backward Ps Times (default = 1) (CUB).\n          case 'D':\n            this.cursorBackward(this.params);\n            break;\n\n          // CSI Ps ; Ps H\n          // Cursor Position [row;column] (default = [1,1]) (CUP).\n          case 'H':\n            this.cursorPos(this.params);\n            break;\n\n          // CSI Ps J  Erase in Display (ED).\n          case 'J':\n            this.eraseInDisplay(this.params);\n            break;\n\n          // CSI Ps K  Erase in Line (EL).\n          case 'K':\n            this.eraseInLine(this.params);\n            break;\n\n          // CSI Pm m  Character Attributes (SGR).\n          case 'm':\n            if (!this.prefix) {\n              this.charAttributes(this.params);\n            }\n            break;\n\n          // CSI Ps n  Device Status Report (DSR).\n          case 'n':\n            if (!this.prefix) {\n              this.deviceStatus(this.params);\n            }\n            break;\n\n            /**\n             * Additions\n             */\n\n          // CSI Ps @\n          // Insert Ps (Blank) Character(s) (default = 1) (ICH).\n          case '@':\n            this.insertChars(this.params);\n            break;\n\n          // CSI Ps E\n          // Cursor Next Line Ps Times (default = 1) (CNL).\n          case 'E':\n            this.cursorNextLine(this.params);\n            break;\n\n          // CSI Ps F\n          // Cursor Preceding Line Ps Times (default = 1) (CNL).\n          case 'F':\n            this.cursorPrecedingLine(this.params);\n            break;\n\n          // CSI Ps G\n          // Cursor Character Absolute  [column] (default = [row,1]) (CHA).\n          case 'G':\n            this.cursorCharAbsolute(this.params);\n            break;\n\n          // CSI Ps L\n          // Insert Ps Line(s) (default = 1) (IL).\n          case 'L':\n            this.insertLines(this.params);\n            break;\n\n          // CSI Ps M\n          // Delete Ps Line(s) (default = 1) (DL).\n          case 'M':\n            this.deleteLines(this.params);\n            break;\n\n          // CSI Ps P\n          // Delete Ps Character(s) (default = 1) (DCH).\n          case 'P':\n            this.deleteChars(this.params);\n            break;\n\n          // CSI Ps X\n          // Erase Ps Character(s) (default = 1) (ECH).\n          case 'X':\n            this.eraseChars(this.params);\n            break;\n\n          // CSI Pm `  Character Position Absolute\n          //   [column] (default = [row,1]) (HPA).\n          case '`':\n            this.charPosAbsolute(this.params);\n            break;\n\n          // 141 61 a * HPR -\n          // Horizontal Position Relative\n          case 'a':\n            this.HPositionRelative(this.params);\n            break;\n\n          // CSI P s c\n          // Send Device Attributes (Primary DA).\n          // CSI > P s c\n          // Send Device Attributes (Secondary DA)\n          case 'c':\n            this.sendDeviceAttributes(this.params);\n            break;\n\n          // CSI Pm d\n          // Line Position Absolute  [row] (default = [1,column]) (VPA).\n          case 'd':\n            this.linePosAbsolute(this.params);\n            break;\n\n          // 145 65 e * VPR - Vertical Position Relative\n          case 'e':\n            this.VPositionRelative(this.params);\n            break;\n\n          // CSI Ps ; Ps f\n          //   Horizontal and Vertical Position [row;column] (default =\n          //   [1,1]) (HVP).\n          case 'f':\n            this.HVPosition(this.params);\n            break;\n\n          // CSI Pm h  Set Mode (SM).\n          // CSI ? Pm h - mouse escape codes, cursor escape codes\n          case 'h':\n            this.setMode(this.params);\n            break;\n\n          // CSI Pm l  Reset Mode (RM).\n          // CSI ? Pm l\n          case 'l':\n            this.resetMode(this.params);\n            break;\n\n          // CSI Ps ; Ps r\n          //   Set Scrolling Region [top;bottom] (default = full size of win-\n          //   dow) (DECSTBM).\n          // CSI ? Pm r\n          case 'r':\n            this.setScrollRegion(this.params);\n            break;\n\n          // CSI s\n          //   Save cursor (ANSI.SYS).\n          case 's':\n            this.saveCursor(this.params);\n            break;\n\n          // CSI u\n          //   Restore cursor (ANSI.SYS).\n          case 'u':\n            this.restoreCursor(this.params);\n            break;\n\n            /**\n             * Lesser Used\n             */\n\n          // CSI Ps I\n          // Cursor Forward Tabulation Ps tab stops (default = 1) (CHT).\n          case 'I':\n            this.cursorForwardTab(this.params);\n            break;\n\n          // CSI Ps S  Scroll up Ps lines (default = 1) (SU).\n          case 'S':\n            this.scrollUp(this.params);\n            break;\n\n          // CSI Ps T  Scroll down Ps lines (default = 1) (SD).\n          // CSI Ps ; Ps ; Ps ; Ps ; Ps T\n          // CSI > Ps; Ps T\n          case 'T':\n            // if (this.prefix === '>') {\n            //   this.resetTitleModes(this.params);\n            //   break;\n            // }\n            // if (this.params.length > 2) {\n            //   this.initMouseTracking(this.params);\n            //   break;\n            // }\n            if (this.params.length < 2 && !this.prefix) {\n              this.scrollDown(this.params);\n            }\n            break;\n\n          // CSI Ps Z\n          // Cursor Backward Tabulation Ps tab stops (default = 1) (CBT).\n          case 'Z':\n            this.cursorBackwardTab(this.params);\n            break;\n\n          // CSI Ps b  Repeat the preceding graphic character Ps times (REP).\n          case 'b':\n            this.repeatPrecedingCharacter(this.params);\n            break;\n\n          // CSI Ps g  Tab Clear (TBC).\n          case 'g':\n            this.tabClear(this.params);\n            break;\n\n            // CSI Pm i  Media Copy (MC).\n            // CSI ? Pm i\n            // case 'i':\n            //   this.mediaCopy(this.params);\n            //   break;\n\n            // CSI Pm m  Character Attributes (SGR).\n            // CSI > Ps; Ps m\n            // case 'm': // duplicate\n            //   if (this.prefix === '>') {\n            //     this.setResources(this.params);\n            //   } else {\n            //     this.charAttributes(this.params);\n            //   }\n            //   break;\n\n            // CSI Ps n  Device Status Report (DSR).\n            // CSI > Ps n\n            // case 'n': // duplicate\n            //   if (this.prefix === '>') {\n            //     this.disableModifiers(this.params);\n            //   } else {\n            //     this.deviceStatus(this.params);\n            //   }\n            //   break;\n\n            // CSI > Ps p  Set pointer mode.\n            // CSI ! p   Soft terminal reset (DECSTR).\n            // CSI Ps$ p\n            //   Request ANSI mode (DECRQM).\n            // CSI ? Ps$ p\n            //   Request DEC private mode (DECRQM).\n            // CSI Ps ; Ps \" p\n          case 'p':\n            switch (this.prefix) {\n                // case '>':\n                //   this.setPointerMode(this.params);\n                //   break;\n              case '!':\n                this.softReset(this.params);\n                break;\n                // case '?':\n                //   if (this.postfix === '$') {\n                //     this.requestPrivateMode(this.params);\n                //   }\n                //   break;\n                // default:\n                //   if (this.postfix === '\"') {\n                //     this.setConformanceLevel(this.params);\n                //   } else if (this.postfix === '$') {\n                //     this.requestAnsiMode(this.params);\n                //   }\n                //   break;\n            }\n            break;\n\n            // CSI Ps q  Load LEDs (DECLL).\n            // CSI Ps SP q\n            // CSI Ps \" q\n            // case 'q':\n            //   if (this.postfix === ' ') {\n            //     this.setCursorStyle(this.params);\n            //     break;\n            //   }\n            //   if (this.postfix === '\"') {\n            //     this.setCharProtectionAttr(this.params);\n            //     break;\n            //   }\n            //   this.loadLEDs(this.params);\n            //   break;\n\n            // CSI Ps ; Ps r\n            //   Set Scrolling Region [top;bottom] (default = full size of win-\n            //   dow) (DECSTBM).\n            // CSI ? Pm r\n            // CSI Pt; Pl; Pb; Pr; Ps$ r\n            // case 'r': // duplicate\n            //   if (this.prefix === '?') {\n            //     this.restorePrivateValues(this.params);\n            //   } else if (this.postfix === '$') {\n            //     this.setAttrInRectangle(this.params);\n            //   } else {\n            //     this.setScrollRegion(this.params);\n            //   }\n            //   break;\n\n            // CSI s     Save cursor (ANSI.SYS).\n            // CSI ? Pm s\n            // case 's': // duplicate\n            //   if (this.prefix === '?') {\n            //     this.savePrivateValues(this.params);\n            //   } else {\n            //     this.saveCursor(this.params);\n            //   }\n            //   break;\n\n            // CSI Ps ; Ps ; Ps t\n            // CSI Pt; Pl; Pb; Pr; Ps$ t\n            // CSI > Ps; Ps t\n            // CSI Ps SP t\n            // case 't':\n            //   if (this.postfix === '$') {\n            //     this.reverseAttrInRectangle(this.params);\n            //   } else if (this.postfix === ' ') {\n            //     this.setWarningBellVolume(this.params);\n            //   } else {\n            //     if (this.prefix === '>') {\n            //       this.setTitleModeFeature(this.params);\n            //     } else {\n            //       this.manipulateWindow(this.params);\n            //     }\n            //   }\n            //   break;\n\n            // CSI u     Restore cursor (ANSI.SYS).\n            // CSI Ps SP u\n            // case 'u': // duplicate\n            //   if (this.postfix === ' ') {\n            //     this.setMarginBellVolume(this.params);\n            //   } else {\n            //     this.restoreCursor(this.params);\n            //   }\n            //   break;\n\n            // CSI Pt; Pl; Pb; Pr; Pp; Pt; Pl; Pp$ v\n            // case 'v':\n            //   if (this.postfix === '$') {\n            //     this.copyRectagle(this.params);\n            //   }\n            //   break;\n\n            // CSI Pt ; Pl ; Pb ; Pr ' w\n            // case 'w':\n            //   if (this.postfix === '\\'') {\n            //     this.enableFilterRectangle(this.params);\n            //   }\n            //   break;\n\n            // CSI Ps x  Request Terminal Parameters (DECREQTPARM).\n            // CSI Ps x  Select Attribute Change Extent (DECSACE).\n            // CSI Pc; Pt; Pl; Pb; Pr$ x\n            // case 'x':\n            //   if (this.postfix === '$') {\n            //     this.fillRectangle(this.params);\n            //   } else {\n            //     this.requestParameters(this.params);\n            //     //this.__(this.params);\n            //   }\n            //   break;\n\n            // CSI Ps ; Pu ' z\n            // CSI Pt; Pl; Pb; Pr$ z\n            // case 'z':\n            //   if (this.postfix === '\\'') {\n            //     this.enableLocatorReporting(this.params);\n            //   } else if (this.postfix === '$') {\n            //     this.eraseRectangle(this.params);\n            //   }\n            //   break;\n\n            // CSI Pm ' {\n            // CSI Pt; Pl; Pb; Pr$ {\n            // case '{':\n            //   if (this.postfix === '\\'') {\n            //     this.setLocatorEvents(this.params);\n            //   } else if (this.postfix === '$') {\n            //     this.selectiveEraseRectangle(this.params);\n            //   }\n            //   break;\n\n            // CSI Ps ' |\n            // case '|':\n            //   if (this.postfix === '\\'') {\n            //     this.requestLocatorPosition(this.params);\n            //   }\n            //   break;\n\n            // CSI P m SP }\n            // Insert P s Column(s) (default = 1) (DECIC), VT420 and up.\n            // case '}':\n            //   if (this.postfix === ' ') {\n            //     this.insertColumns(this.params);\n            //   }\n            //   break;\n\n            // CSI P m SP ~\n            // Delete P s Column(s) (default = 1) (DECDC), VT420 and up\n            // case '~':\n            //   if (this.postfix === ' ') {\n            //     this.deleteColumns(this.params);\n            //   }\n            //   break;\n\n          default:\n            this.error('Unknown CSI code: %s.', ch);\n            break;\n        }\n\n        this.prefix = '';\n        this.postfix = '';\n        break;\n\n      case dcs:\n        if (ch === '\\x1b' || ch === '\\x07') {\n          if (ch === '\\x1b') i++;\n\n          switch (this.prefix) {\n            // User-Defined Keys (DECUDK).\n            case '':\n              break;\n\n            // Request Status String (DECRQSS).\n            // test: echo -e '\\eP$q\"p\\e\\\\'\n            case '$q':\n              var pt = this.currentParam\n              , valid = false;\n\n              switch (pt) {\n                // DECSCA\n                case '\"q':\n                  pt = '0\"q';\n                  break;\n\n                // DECSCL\n                case '\"p':\n                  pt = '61\"p';\n                  break;\n\n                // DECSTBM\n                case 'r':\n                  pt = ''\n                    + (this.scrollTop + 1)\n                    + ';'\n                    + (this.scrollBottom + 1)\n                    + 'r';\n                  break;\n\n                // SGR\n                case 'm':\n                  pt = '0m';\n                  break;\n\n                default:\n                  this.error('Unknown DCS Pt: %s.', pt);\n                  pt = '';\n                  break;\n              }\n\n              this.send('\\x1bP' + +valid + '$r' + pt + '\\x1b\\\\');\n              break;\n\n            // Set Termcap/Terminfo Data (xterm, experimental).\n            case '+p':\n              break;\n\n            // Request Termcap/Terminfo String (xterm, experimental)\n            // Regular xterm does not even respond to this sequence.\n            // This can cause a small glitch in vim.\n            // test: echo -ne '\\eP+q6b64\\e\\\\'\n            case '+q':\n              var pt = this.currentParam\n              , valid = false;\n\n              this.send('\\x1bP' + +valid + '+r' + pt + '\\x1b\\\\');\n              break;\n\n            default:\n              this.error('Unknown DCS prefix: %s.', this.prefix);\n              break;\n          }\n\n          this.currentParam = 0;\n          this.prefix = '';\n          this.state = normal;\n        } else if (!this.currentParam) {\n          if (!this.prefix && ch !== '$' && ch !== '+') {\n            this.currentParam = ch;\n          } else if (this.prefix.length === 2) {\n            this.currentParam = ch;\n          } else {\n            this.prefix += ch;\n          }\n        } else {\n          this.currentParam += ch;\n        }\n        break;\n\n      case ignore:\n        // For PM and APC.\n        if (ch === '\\x1b' || ch === '\\x07') {\n          if (ch === '\\x1b') i++;\n          this.state = normal;\n        }\n        break;\n    }\n  }\n\n  this.updateRange(this.y);\n  this.refresh(this.refreshStart, this.refreshEnd);\n};\n\n/**\n * Writes text to the terminal, followed by a break line character (\\n).\n * @param {string} text The text to write to the terminal.\n */\nTerminal.prototype.writeln = function(data) {\n  this.write(data + '\\r\\n');\n};\n\n/**\n * Attaches a custom keydown handler which is run before keys are processed, giving consumers of\n * xterm.js ultimate control as to what keys should be processed by the terminal and what keys\n * should not.\n * @param {function} customKeydownHandler The custom KeyboardEvent handler to attach. This is a\n *   function that takes a KeyboardEvent, allowing consumers to stop propogation and/or prevent\n *   the default action. The function returns whether the event should be processed by xterm.js.\n */\nTerminal.prototype.attachCustomKeydownHandler = function(customKeydownHandler) {\n  this.customKeydownHandler = customKeydownHandler;\n}\n\n/**\n * Handle a keydown event\n * Key Resources:\n *   - https://developer.mozilla.org/en-US/docs/DOM/KeyboardEvent\n * @param {KeyboardEvent} ev The keydown event to be handled.\n */\nTerminal.prototype.keyDown = function(ev) {\n  // Scroll down to prompt, whenever the user presses a key.\n  if (this.ybase !== this.ydisp) {\n    this.scrollToBottom();\n  }\n\n  if (this.customKeydownHandler && this.customKeydownHandler(ev) === false) {\n    return false;\n  }\n\n  if (!this.compositionHelper.keydown.bind(this.compositionHelper)(ev)) {\n    return false;\n  }\n\n  var self = this;\n  var result = this.evaluateKeyEscapeSequence(ev);\n\n  if (result.scrollDisp) {\n    this.scrollDisp(result.scrollDisp);\n    return this.cancel(ev, true);\n  }\n\n  if (isThirdLevelShift(this, ev)) {\n    return true;\n  }\n\n  if (result.cancel) {\n    // The event is canceled at the end already, is this necessary?\n    this.cancel(ev, true);\n  }\n\n  if (!result.key) {\n    return true;\n  }\n\n  this.emit('keydown', ev);\n  this.emit('key', result.key, ev);\n  this.showCursor();\n  this.handler(result.key);\n\n  return this.cancel(ev, true);\n};\n\n/**\n * Returns an object that determines how a KeyboardEvent should be handled. The key of the\n * returned value is the new key code to pass to the PTY.\n *\n * Reference: http://invisible-island.net/xterm/ctlseqs/ctlseqs.html\n * @param {KeyboardEvent} ev The keyboard event to be translated to key escape sequence.\n */\nTerminal.prototype.evaluateKeyEscapeSequence = function(ev) {\n  var result = {\n    // Whether to cancel event propogation (NOTE: this may not be needed since the event is\n    // canceled at the end of keyDown\n    cancel: false,\n    // The new key even to emit\n    key: undefined,\n    // The number of characters to scroll, if this is defined it will cancel the event\n    scrollDisp: undefined\n  };\n  var modifiers = ev.shiftKey << 0 | ev.altKey << 1 | ev.ctrlKey << 2 | ev.metaKey << 3;\n  switch (ev.keyCode) {\n    case 8:\n      // backspace\n      if (ev.shiftKey) {\n        result.key = '\\x08'; // ^H\n        break;\n      }\n      result.key = '\\x7f'; // ^?\n      break;\n    case 9:\n      // tab\n      if (ev.shiftKey) {\n        result.key = '\\x1b[Z';\n        break;\n      }\n      result.key = '\\t';\n      result.cancel = true;\n      break;\n    case 13:\n      // return/enter\n      result.key = '\\r';\n      result.cancel = true;\n      break;\n    case 27:\n      // escape\n      result.key = '\\x1b';\n      result.cancel = true;\n      break;\n    case 37:\n      // left-arrow\n      if (modifiers) {\n        result.key = '\\x1b[1;' + (modifiers + 1) + 'D';\n        // HACK: Make Alt + left-arrow behave like Ctrl + left-arrow: move one word backwards\n        // http://unix.stackexchange.com/a/108106\n        if (result.key == '\\x1b[1;3D') {\n          result.key = '\\x1b[1;5D';\n        }\n      } else if (this.applicationCursor) {\n        result.key = '\\x1bOD';\n      } else {\n        result.key = '\\x1b[D';\n      }\n      break;\n    case 39:\n      // right-arrow\n      if (modifiers) {\n        result.key = '\\x1b[1;' + (modifiers + 1) + 'C';\n        // HACK: Make Alt + right-arrow behave like Ctrl + right-arrow: move one word forward\n        // http://unix.stackexchange.com/a/108106\n        if (result.key == '\\x1b[1;3C') {\n          result.key = '\\x1b[1;5C';\n        }\n      } else if (this.applicationCursor) {\n        result.key = '\\x1bOC';\n      } else {\n        result.key = '\\x1b[C';\n      }\n      break;\n    case 38:\n      // up-arrow\n      if (modifiers) {\n        result.key = '\\x1b[1;' + (modifiers + 1) + 'A';\n        // HACK: Make Alt + up-arrow behave like Ctrl + up-arrow\n        // http://unix.stackexchange.com/a/108106\n        if (result.key == '\\x1b[1;3A') {\n          result.key = '\\x1b[1;5A';\n        }\n      } else if (this.applicationCursor) {\n        result.key = '\\x1bOA';\n      } else {\n        result.key = '\\x1b[A';\n      }\n      break;\n    case 40:\n      // down-arrow\n      if (modifiers) {\n        result.key = '\\x1b[1;' + (modifiers + 1) + 'B';\n        // HACK: Make Alt + down-arrow behave like Ctrl + down-arrow\n        // http://unix.stackexchange.com/a/108106\n        if (result.key == '\\x1b[1;3B') {\n          result.key = '\\x1b[1;5B';\n        }\n      } else if (this.applicationCursor) {\n        result.key = '\\x1bOB';\n      } else {\n        result.key = '\\x1b[B';\n      }\n      break;\n    case 45:\n      // insert\n      if (!ev.shiftKey && !ev.ctrlKey) {\n        // <Ctrl> or <Shift> + <Insert> are used to\n        // copy-paste on some systems.\n        result.key = '\\x1b[2~';\n      }\n      break;\n    case 46:\n      // delete\n      if (modifiers) {\n        result.key = '\\x1b[3;' + (modifiers + 1) + '~';\n      } else {\n        result.key = '\\x1b[3~';\n      }\n      break;\n    case 36:\n      // home\n      if (modifiers)\n        result.key = '\\x1b[1;' + (modifiers + 1) + 'H';\n      else if (this.applicationCursor)\n        result.key = '\\x1bOH';\n      else\n        result.key = '\\x1b[H';\n      break;\n    case 35:\n      // end\n      if (modifiers)\n        result.key = '\\x1b[1;' + (modifiers + 1) + 'F';\n      else if (this.applicationCursor)\n        result.key = '\\x1bOF';\n      else\n        result.key = '\\x1b[F';\n      break;\n    case 33:\n      // page up\n      if (ev.shiftKey) {\n        result.scrollDisp = -(this.rows - 1);\n      } else {\n        result.key = '\\x1b[5~';\n      }\n      break;\n    case 34:\n      // page down\n      if (ev.shiftKey) {\n        result.scrollDisp = this.rows - 1;\n      } else {\n        result.key = '\\x1b[6~';\n      }\n      break;\n    case 112:\n      // F1-F12\n      if (modifiers) {\n        result.key = '\\x1b[1;' + (modifiers + 1) + 'P';\n      } else {\n        result.key = '\\x1bOP';\n      }\n      break;\n    case 113:\n      if (modifiers) {\n        result.key = '\\x1b[1;' + (modifiers + 1) + 'Q';\n      } else {\n        result.key = '\\x1bOQ';\n      }\n      break;\n    case 114:\n      if (modifiers) {\n        result.key = '\\x1b[1;' + (modifiers + 1) + 'R';\n      } else {\n        result.key = '\\x1bOR';\n      }\n      break;\n    case 115:\n      if (modifiers) {\n        result.key = '\\x1b[1;' + (modifiers + 1) + 'S';\n      } else {\n        result.key = '\\x1bOS';\n      }\n      break;\n    case 116:\n      if (modifiers) {\n        result.key = '\\x1b[15;' + (modifiers + 1) + '~';\n      } else {\n        result.key = '\\x1b[15~';\n      }\n      break;\n    case 117:\n      if (modifiers) {\n        result.key = '\\x1b[17;' + (modifiers + 1) + '~';\n      } else {\n        result.key = '\\x1b[17~';\n      }\n      break;\n    case 118:\n      if (modifiers) {\n        result.key = '\\x1b[18;' + (modifiers + 1) + '~';\n      } else {\n        result.key = '\\x1b[18~';\n      }\n      break;\n    case 119:\n      if (modifiers) {\n        result.key = '\\x1b[19;' + (modifiers + 1) + '~';\n      } else {\n        result.key = '\\x1b[19~';\n      }\n      break;\n    case 120:\n      if (modifiers) {\n        result.key = '\\x1b[20;' + (modifiers + 1) + '~';\n      } else {\n        result.key = '\\x1b[20~';\n      }\n      break;\n    case 121:\n      if (modifiers) {\n        result.key = '\\x1b[21;' + (modifiers + 1) + '~';\n      } else {\n        result.key = '\\x1b[21~';\n      }\n      break;\n    case 122:\n      if (modifiers) {\n        result.key = '\\x1b[23;' + (modifiers + 1) + '~';\n      } else {\n        result.key = '\\x1b[23~';\n      }\n      break;\n    case 123:\n      if (modifiers) {\n        result.key = '\\x1b[24;' + (modifiers + 1) + '~';\n      } else {\n        result.key = '\\x1b[24~';\n      }\n      break;\n    default:\n      // a-z and space\n      if (ev.ctrlKey && !ev.shiftKey && !ev.altKey && !ev.metaKey) {\n        if (ev.keyCode >= 65 && ev.keyCode <= 90) {\n          result.key = String.fromCharCode(ev.keyCode - 64);\n        } else if (ev.keyCode === 32) {\n          // NUL\n          result.key = String.fromCharCode(0);\n        } else if (ev.keyCode >= 51 && ev.keyCode <= 55) {\n          // escape, file sep, group sep, record sep, unit sep\n          result.key = String.fromCharCode(ev.keyCode - 51 + 27);\n        } else if (ev.keyCode === 56) {\n          // delete\n          result.key = String.fromCharCode(127);\n        } else if (ev.keyCode === 219) {\n          // ^[ - escape\n          result.key = String.fromCharCode(27);\n        } else if (ev.keyCode === 221) {\n          // ^] - group sep\n          result.key = String.fromCharCode(29);\n        }\n      } else if (!this.browser.isMac && ev.altKey && !ev.ctrlKey && !ev.metaKey) {\n        // On Mac this is a third level shift. Use <Esc> instead.\n        if (ev.keyCode >= 65 && ev.keyCode <= 90) {\n          result.key = '\\x1b' + String.fromCharCode(ev.keyCode + 32);\n        } else if (ev.keyCode === 192) {\n          result.key = '\\x1b`';\n        } else if (ev.keyCode >= 48 && ev.keyCode <= 57) {\n          result.key = '\\x1b' + (ev.keyCode - 48);\n        }\n      }\n      break;\n  }\n  return result;\n};\n\n/**\n * Set the G level of the terminal\n * @param g\n */\nTerminal.prototype.setgLevel = function(g) {\n  this.glevel = g;\n  this.charset = this.charsets[g];\n};\n\n/**\n * Set the charset for the given G level of the terminal\n * @param g\n * @param charset\n */\nTerminal.prototype.setgCharset = function(g, charset) {\n  this.charsets[g] = charset;\n  if (this.glevel === g) {\n    this.charset = charset;\n  }\n};\n\n/**\n * Handle a keypress event.\n * Key Resources:\n *   - https://developer.mozilla.org/en-US/docs/DOM/KeyboardEvent\n * @param {KeyboardEvent} ev The keypress event to be handled.\n */\nTerminal.prototype.keyPress = function(ev) {\n  var key;\n\n  this.cancel(ev);\n\n  if (ev.charCode) {\n    key = ev.charCode;\n  } else if (ev.which == null) {\n    key = ev.keyCode;\n  } else if (ev.which !== 0 && ev.charCode !== 0) {\n    key = ev.which;\n  } else {\n    return false;\n  }\n\n  if (!key || (\n    (ev.altKey || ev.ctrlKey || ev.metaKey) && !isThirdLevelShift(this, ev)\n  )) {\n    return false;\n  }\n\n  key = String.fromCharCode(key);\n\n  this.emit('keypress', key, ev);\n  this.emit('key', key, ev);\n  this.showCursor();\n  this.handler(key);\n\n  return false;\n};\n\n/**\n * Send data for handling to the terminal\n * @param {string} data\n */\nTerminal.prototype.send = function(data) {\n  var self = this;\n\n  if (!this.queue) {\n    setTimeout(function() {\n      self.handler(self.queue);\n      self.queue = '';\n    }, 1);\n  }\n\n  this.queue += data;\n};\n\n/**\n * Ring the bell.\n * Note: We could do sweet things with webaudio here\n */\nTerminal.prototype.bell = function() {\n  if (!this.visualBell) return;\n  var self = this;\n  this.element.style.borderColor = 'white';\n  setTimeout(function() {\n    self.element.style.borderColor = '';\n  }, 10);\n  if (this.popOnBell) this.focus();\n};\n\n/**\n * Log the current state to the console.\n */\nTerminal.prototype.log = function() {\n  if (!this.debug) return;\n  if (!this.context.console || !this.context.console.log) return;\n  var args = Array.prototype.slice.call(arguments);\n  this.context.console.log.apply(this.context.console, args);\n};\n\n/**\n * Log the current state as error to the console.\n */\nTerminal.prototype.error = function() {\n  if (!this.debug) return;\n  if (!this.context.console || !this.context.console.error) return;\n  var args = Array.prototype.slice.call(arguments);\n  this.context.console.error.apply(this.context.console, args);\n};\n\n/**\n * Resizes the terminal.\n *\n * @param {number} x The number of columns to resize to.\n * @param {number} y The number of rows to resize to.\n */\nTerminal.prototype.resize = function(x, y) {\n  var line\n  , el\n  , i\n  , j\n  , ch\n  , addToY;\n\n  if (x === this.cols && y === this.rows) {\n    return;\n  }\n\n  if (x < 1) x = 1;\n  if (y < 1) y = 1;\n\n  // resize cols\n  j = this.cols;\n  if (j < x) {\n    ch = [this.defAttr, ' ', 1]; // does xterm use the default attr?\n    i = this.lines.length;\n    while (i--) {\n      while (this.lines[i].length < x) {\n        this.lines[i].push(ch);\n      }\n    }\n  } else { // (j > x)\n    i = this.lines.length;\n    while (i--) {\n      while (this.lines[i].length > x) {\n        this.lines[i].pop();\n      }\n    }\n  }\n  this.setupStops(j);\n  this.cols = x;\n\n  // resize rows\n  j = this.rows;\n  addToY = 0;\n  if (j < y) {\n    el = this.element;\n    while (j++ < y) {\n      // y is rows, not this.y\n      if (this.lines.length < y + this.ybase) {\n        if (this.ybase > 0 && this.lines.length <= this.ybase + this.y + addToY + 1) {\n          // There is room above the buffer and there are no empty elements below the line,\n          // scroll up\n          this.ybase--;\n          addToY++\n          if (this.ydisp > 0) {\n            // Viewport is at the top of the buffer, must increase downwards\n            this.ydisp--;\n          }\n        } else {\n          // Add a blank line if there is no buffer left at the top to scroll to, or if there\n          // are blank lines after the cursor\n          this.lines.push(this.blankLine());\n        }\n      }\n      if (this.children.length < y) {\n        this.insertRow();\n      }\n    }\n  } else { // (j > y)\n    while (j-- > y) {\n      if (this.lines.length > y + this.ybase) {\n        if (this.lines.length > this.ybase + this.y + 1) {\n          // The line is a blank line below the cursor, remove it\n          this.lines.pop();\n        } else {\n          // The line is the cursor, scroll down\n          this.ybase++;\n          this.ydisp++;\n        }\n      }\n      if (this.children.length > y) {\n        el = this.children.shift();\n        if (!el) continue;\n        el.parentNode.removeChild(el);\n      }\n    }\n  }\n  this.rows = y;\n\n  // Make sure that the cursor stays on screen\n  if (this.y >= y) {\n    this.y = y - 1;\n  }\n  if (addToY) {\n    this.y += addToY;\n  }\n\n  if (this.x >= x) {\n    this.x = x - 1;\n  }\n\n  this.scrollTop = 0;\n  this.scrollBottom = y - 1;\n\n  this.refresh(0, this.rows - 1);\n\n  this.normal = null;\n\n  this.geometry = [this.cols, this.rows];\n  this.emit('resize', {terminal: this, cols: x, rows: y});\n};\n\n/**\n * Updates the range of rows to refresh\n * @param {number} y The number of rows to refresh next.\n */\nTerminal.prototype.updateRange = function(y) {\n  if (y < this.refreshStart) this.refreshStart = y;\n  if (y > this.refreshEnd) this.refreshEnd = y;\n  // if (y > this.refreshEnd) {\n  //   this.refreshEnd = y;\n  //   if (y > this.rows - 1) {\n  //     this.refreshEnd = this.rows - 1;\n  //   }\n  // }\n};\n\n/**\n * Set the range of refreshing to the maximum value\n */\nTerminal.prototype.maxRange = function() {\n  this.refreshStart = 0;\n  this.refreshEnd = this.rows - 1;\n};\n\n\n\n/**\n * Setup the tab stops.\n * @param {number} i\n */\nTerminal.prototype.setupStops = function(i) {\n  if (i != null) {\n    if (!this.tabs[i]) {\n      i = this.prevStop(i);\n    }\n  } else {\n    this.tabs = {};\n    i = 0;\n  }\n\n  for (; i < this.cols; i += 8) {\n    this.tabs[i] = true;\n  }\n};\n\n\n/**\n * Move the cursor to the previous tab stop from the given position (default is current).\n * @param {number} x The position to move the cursor to the previous tab stop.\n */\nTerminal.prototype.prevStop = function(x) {\n  if (x == null) x = this.x;\n  while (!this.tabs[--x] && x > 0);\n  return x >= this.cols\n    ? this.cols - 1\n  : x < 0 ? 0 : x;\n};\n\n\n/**\n * Move the cursor one tab stop forward from the given position (default is current).\n * @param {number} x The position to move the cursor one tab stop forward.\n */\nTerminal.prototype.nextStop = function(x) {\n  if (x == null) x = this.x;\n  while (!this.tabs[++x] && x < this.cols);\n  return x >= this.cols\n    ? this.cols - 1\n  : x < 0 ? 0 : x;\n};\n\n\n/**\n * Erase in the identified line everything from \"x\" to the end of the line (right).\n * @param {number} x The column from which to start erasing to the end of the line.\n * @param {number} y The line in which to operate.\n */\nTerminal.prototype.eraseRight = function(x, y) {\n  var line = this.lines[this.ybase + y]\n  , ch = [this.eraseAttr(), ' ', 1]; // xterm\n\n\n  for (; x < this.cols; x++) {\n    line[x] = ch;\n  }\n\n  this.updateRange(y);\n};\n\n\n\n/**\n * Erase in the identified line everything from \"x\" to the start of the line (left).\n * @param {number} x The column from which to start erasing to the start of the line.\n * @param {number} y The line in which to operate.\n */\nTerminal.prototype.eraseLeft = function(x, y) {\n  var line = this.lines[this.ybase + y]\n  , ch = [this.eraseAttr(), ' ', 1]; // xterm\n\n  x++;\n  while (x--) line[x] = ch;\n\n  this.updateRange(y);\n};\n\n/**\n * Clears the entire buffer, making the prompt line the new first line.\n */\nTerminal.prototype.clear = function() {\n  if (this.ybase === 0 && this.y === 0) {\n    // Don't clear if it's already clear\n    return;\n  }\n  this.lines = [this.lines[this.ybase + this.y]];\n  this.ydisp = 0;\n  this.ybase = 0;\n  this.y = 0;\n  for (var i = 1; i < this.rows; i++) {\n    this.lines.push(this.blankLine());\n  }\n  this.refresh(0, this.rows - 1);\n  this.emit('scroll', this.ydisp);\n};\n\n/**\n * Erase all content in the given line\n * @param {number} y The line to erase all of its contents.\n */\nTerminal.prototype.eraseLine = function(y) {\n  this.eraseRight(0, y);\n};\n\n\n/**\n * Return the data array of a blank line/\n * @param {number} cur First bunch of data for each \"blank\" character.\n */\nTerminal.prototype.blankLine = function(cur) {\n  var attr = cur\n  ? this.eraseAttr()\n  : this.defAttr;\n\n  var ch = [attr, ' ', 1]  // width defaults to 1 halfwidth character\n  , line = []\n  , i = 0;\n\n  for (; i < this.cols; i++) {\n    line[i] = ch;\n  }\n\n  return line;\n};\n\n\n/**\n * If cur return the back color xterm feature attribute. Else return defAttr.\n * @param {object} cur\n */\nTerminal.prototype.ch = function(cur) {\n  return cur\n    ? [this.eraseAttr(), ' ', 1]\n  : [this.defAttr, ' ', 1];\n};\n\n\n/**\n * Evaluate if the current erminal is the given argument.\n * @param {object} term The terminal to evaluate\n */\nTerminal.prototype.is = function(term) {\n  var name = this.termName;\n  return (name + '').indexOf(term) === 0;\n};\n\n\n/**\n * Emit the 'data' event and populate the given data.\n * @param {string} data The data to populate in the event.\n */\nTerminal.prototype.handler = function(data) {\n  this.emit('data', data);\n};\n\n\n/**\n * Emit the 'title' event and populate the given title.\n * @param {string} title The title to populate in the event.\n */\nTerminal.prototype.handleTitle = function(title) {\n  this.emit('title', title);\n};\n\n\n/**\n * ESC\n */\n\n/**\n * ESC D Index (IND is 0x84).\n */\nTerminal.prototype.index = function() {\n  this.y++;\n  if (this.y > this.scrollBottom) {\n    this.y--;\n    this.scroll();\n  }\n  this.state = normal;\n};\n\n\n/**\n * ESC M Reverse Index (RI is 0x8d).\n */\nTerminal.prototype.reverseIndex = function() {\n  var j;\n  this.y--;\n  if (this.y < this.scrollTop) {\n    this.y++;\n    // possibly move the code below to term.reverseScroll();\n    // test: echo -ne '\\e[1;1H\\e[44m\\eM\\e[0m'\n    // blankLine(true) is xterm/linux behavior\n    this.lines.splice(this.y + this.ybase, 0, this.blankLine(true));\n    j = this.rows - 1 - this.scrollBottom;\n    this.lines.splice(this.rows - 1 + this.ybase - j + 1, 1);\n    // this.maxRange();\n    this.updateRange(this.scrollTop);\n    this.updateRange(this.scrollBottom);\n  }\n  this.state = normal;\n};\n\n\n/**\n * ESC c Full Reset (RIS).\n */\nTerminal.prototype.reset = function() {\n  this.options.rows = this.rows;\n  this.options.cols = this.cols;\n  var customKeydownHandler = this.customKeydownHandler;\n  Terminal.call(this, this.options);\n  this.customKeydownHandler = customKeydownHandler;\n  this.refresh(0, this.rows - 1);\n  this.viewport.syncScrollArea();\n};\n\n\n/**\n * ESC H Tab Set (HTS is 0x88).\n */\nTerminal.prototype.tabSet = function() {\n  this.tabs[this.x] = true;\n  this.state = normal;\n};\n\n\n/**\n * CSI\n */\n\n/**\n * CSI Ps A\n * Cursor Up Ps Times (default = 1) (CUU).\n */\nTerminal.prototype.cursorUp = function(params) {\n  var param = params[0];\n  if (param < 1) param = 1;\n  this.y -= param;\n  if (this.y < 0) this.y = 0;\n};\n\n\n/**\n * CSI Ps B\n * Cursor Down Ps Times (default = 1) (CUD).\n */\nTerminal.prototype.cursorDown = function(params) {\n  var param = params[0];\n  if (param < 1) param = 1;\n  this.y += param;\n  if (this.y >= this.rows) {\n    this.y = this.rows - 1;\n  }\n};\n\n\n/**\n * CSI Ps C\n * Cursor Forward Ps Times (default = 1) (CUF).\n */\nTerminal.prototype.cursorForward = function(params) {\n  var param = params[0];\n  if (param < 1) param = 1;\n  this.x += param;\n  if (this.x >= this.cols) {\n    this.x = this.cols - 1;\n  }\n};\n\n\n/**\n * CSI Ps D\n * Cursor Backward Ps Times (default = 1) (CUB).\n */\nTerminal.prototype.cursorBackward = function(params) {\n  var param = params[0];\n  if (param < 1) param = 1;\n  this.x -= param;\n  if (this.x < 0) this.x = 0;\n};\n\n\n/**\n * CSI Ps ; Ps H\n * Cursor Position [row;column] (default = [1,1]) (CUP).\n */\nTerminal.prototype.cursorPos = function(params) {\n  var row, col;\n\n  row = params[0] - 1;\n\n  if (params.length >= 2) {\n    col = params[1] - 1;\n  } else {\n    col = 0;\n  }\n\n  if (row < 0) {\n    row = 0;\n  } else if (row >= this.rows) {\n    row = this.rows - 1;\n  }\n\n  if (col < 0) {\n    col = 0;\n  } else if (col >= this.cols) {\n    col = this.cols - 1;\n  }\n\n  this.x = col;\n  this.y = row;\n};\n\n\n/**\n * CSI Ps J  Erase in Display (ED).\n *     Ps = 0  -> Erase Below (default).\n *     Ps = 1  -> Erase Above.\n *     Ps = 2  -> Erase All.\n *     Ps = 3  -> Erase Saved Lines (xterm).\n * CSI ? Ps J\n *   Erase in Display (DECSED).\n *     Ps = 0  -> Selective Erase Below (default).\n *     Ps = 1  -> Selective Erase Above.\n *     Ps = 2  -> Selective Erase All.\n */\nTerminal.prototype.eraseInDisplay = function(params) {\n  var j;\n  switch (params[0]) {\n    case 0:\n      this.eraseRight(this.x, this.y);\n      j = this.y + 1;\n      for (; j < this.rows; j++) {\n        this.eraseLine(j);\n      }\n      break;\n    case 1:\n      this.eraseLeft(this.x, this.y);\n      j = this.y;\n      while (j--) {\n        this.eraseLine(j);\n      }\n      break;\n    case 2:\n      j = this.rows;\n      while (j--) this.eraseLine(j);\n      break;\n    case 3:\n      ; // no saved lines\n      break;\n  }\n};\n\n\n/**\n * CSI Ps K  Erase in Line (EL).\n *     Ps = 0  -> Erase to Right (default).\n *     Ps = 1  -> Erase to Left.\n *     Ps = 2  -> Erase All.\n * CSI ? Ps K\n *   Erase in Line (DECSEL).\n *     Ps = 0  -> Selective Erase to Right (default).\n *     Ps = 1  -> Selective Erase to Left.\n *     Ps = 2  -> Selective Erase All.\n */\nTerminal.prototype.eraseInLine = function(params) {\n  switch (params[0]) {\n    case 0:\n      this.eraseRight(this.x, this.y);\n      break;\n    case 1:\n      this.eraseLeft(this.x, this.y);\n      break;\n    case 2:\n      this.eraseLine(this.y);\n      break;\n  }\n};\n\n\n/**\n * CSI Pm m  Character Attributes (SGR).\n *     Ps = 0  -> Normal (default).\n *     Ps = 1  -> Bold.\n *     Ps = 4  -> Underlined.\n *     Ps = 5  -> Blink (appears as Bold).\n *     Ps = 7  -> Inverse.\n *     Ps = 8  -> Invisible, i.e., hidden (VT300).\n *     Ps = 2 2  -> Normal (neither bold nor faint).\n *     Ps = 2 4  -> Not underlined.\n *     Ps = 2 5  -> Steady (not blinking).\n *     Ps = 2 7  -> Positive (not inverse).\n *     Ps = 2 8  -> Visible, i.e., not hidden (VT300).\n *     Ps = 3 0  -> Set foreground color to Black.\n *     Ps = 3 1  -> Set foreground color to Red.\n *     Ps = 3 2  -> Set foreground color to Green.\n *     Ps = 3 3  -> Set foreground color to Yellow.\n *     Ps = 3 4  -> Set foreground color to Blue.\n *     Ps = 3 5  -> Set foreground color to Magenta.\n *     Ps = 3 6  -> Set foreground color to Cyan.\n *     Ps = 3 7  -> Set foreground color to White.\n *     Ps = 3 9  -> Set foreground color to default (original).\n *     Ps = 4 0  -> Set background color to Black.\n *     Ps = 4 1  -> Set background color to Red.\n *     Ps = 4 2  -> Set background color to Green.\n *     Ps = 4 3  -> Set background color to Yellow.\n *     Ps = 4 4  -> Set background color to Blue.\n *     Ps = 4 5  -> Set background color to Magenta.\n *     Ps = 4 6  -> Set background color to Cyan.\n *     Ps = 4 7  -> Set background color to White.\n *     Ps = 4 9  -> Set background color to default (original).\n *\n *   If 16-color support is compiled, the following apply.  Assume\n *   that xterm's resources are set so that the ISO color codes are\n *   the first 8 of a set of 16.  Then the aixterm colors are the\n *   bright versions of the ISO colors:\n *     Ps = 9 0  -> Set foreground color to Black.\n *     Ps = 9 1  -> Set foreground color to Red.\n *     Ps = 9 2  -> Set foreground color to Green.\n *     Ps = 9 3  -> Set foreground color to Yellow.\n *     Ps = 9 4  -> Set foreground color to Blue.\n *     Ps = 9 5  -> Set foreground color to Magenta.\n *     Ps = 9 6  -> Set foreground color to Cyan.\n *     Ps = 9 7  -> Set foreground color to White.\n *     Ps = 1 0 0  -> Set background color to Black.\n *     Ps = 1 0 1  -> Set background color to Red.\n *     Ps = 1 0 2  -> Set background color to Green.\n *     Ps = 1 0 3  -> Set background color to Yellow.\n *     Ps = 1 0 4  -> Set background color to Blue.\n *     Ps = 1 0 5  -> Set background color to Magenta.\n *     Ps = 1 0 6  -> Set background color to Cyan.\n *     Ps = 1 0 7  -> Set background color to White.\n *\n *   If xterm is compiled with the 16-color support disabled, it\n *   supports the following, from rxvt:\n *     Ps = 1 0 0  -> Set foreground and background color to\n *     default.\n *\n *   If 88- or 256-color support is compiled, the following apply.\n *     Ps = 3 8  ; 5  ; Ps -> Set foreground color to the second\n *     Ps.\n *     Ps = 4 8  ; 5  ; Ps -> Set background color to the second\n *     Ps.\n */\nTerminal.prototype.charAttributes = function(params) {\n  // Optimize a single SGR0.\n  if (params.length === 1 && params[0] === 0) {\n    this.curAttr = this.defAttr;\n    return;\n  }\n\n  var l = params.length\n  , i = 0\n  , flags = this.curAttr >> 18\n  , fg = (this.curAttr >> 9) & 0x1ff\n  , bg = this.curAttr & 0x1ff\n  , p;\n\n  for (; i < l; i++) {\n    p = params[i];\n    if (p >= 30 && p <= 37) {\n      // fg color 8\n      fg = p - 30;\n    } else if (p >= 40 && p <= 47) {\n      // bg color 8\n      bg = p - 40;\n    } else if (p >= 90 && p <= 97) {\n      // fg color 16\n      p += 8;\n      fg = p - 90;\n    } else if (p >= 100 && p <= 107) {\n      // bg color 16\n      p += 8;\n      bg = p - 100;\n    } else if (p === 0) {\n      // default\n      flags = this.defAttr >> 18;\n      fg = (this.defAttr >> 9) & 0x1ff;\n      bg = this.defAttr & 0x1ff;\n      // flags = 0;\n      // fg = 0x1ff;\n      // bg = 0x1ff;\n    } else if (p === 1) {\n      // bold text\n      flags |= 1;\n    } else if (p === 4) {\n      // underlined text\n      flags |= 2;\n    } else if (p === 5) {\n      // blink\n      flags |= 4;\n    } else if (p === 7) {\n      // inverse and positive\n      // test with: echo -e '\\e[31m\\e[42mhello\\e[7mworld\\e[27mhi\\e[m'\n      flags |= 8;\n    } else if (p === 8) {\n      // invisible\n      flags |= 16;\n    } else if (p === 22) {\n      // not bold\n      flags &= ~1;\n    } else if (p === 24) {\n      // not underlined\n      flags &= ~2;\n    } else if (p === 25) {\n      // not blink\n      flags &= ~4;\n    } else if (p === 27) {\n      // not inverse\n      flags &= ~8;\n    } else if (p === 28) {\n      // not invisible\n      flags &= ~16;\n    } else if (p === 39) {\n      // reset fg\n      fg = (this.defAttr >> 9) & 0x1ff;\n    } else if (p === 49) {\n      // reset bg\n      bg = this.defAttr & 0x1ff;\n    } else if (p === 38) {\n      // fg color 256\n      if (params[i + 1] === 2) {\n        i += 2;\n        fg = matchColor(\n          params[i] & 0xff,\n          params[i + 1] & 0xff,\n          params[i + 2] & 0xff);\n        if (fg === -1) fg = 0x1ff;\n        i += 2;\n      } else if (params[i + 1] === 5) {\n        i += 2;\n        p = params[i] & 0xff;\n        fg = p;\n      }\n    } else if (p === 48) {\n      // bg color 256\n      if (params[i + 1] === 2) {\n        i += 2;\n        bg = matchColor(\n          params[i] & 0xff,\n          params[i + 1] & 0xff,\n          params[i + 2] & 0xff);\n        if (bg === -1) bg = 0x1ff;\n        i += 2;\n      } else if (params[i + 1] === 5) {\n        i += 2;\n        p = params[i] & 0xff;\n        bg = p;\n      }\n    } else if (p === 100) {\n      // reset fg/bg\n      fg = (this.defAttr >> 9) & 0x1ff;\n      bg = this.defAttr & 0x1ff;\n    } else {\n      this.error('Unknown SGR attribute: %d.', p);\n    }\n  }\n\n  this.curAttr = (flags << 18) | (fg << 9) | bg;\n};\n\n\n/**\n * CSI Ps n  Device Status Report (DSR).\n *     Ps = 5  -> Status Report.  Result (``OK'') is\n *   CSI 0 n\n *     Ps = 6  -> Report Cursor Position (CPR) [row;column].\n *   Result is\n *   CSI r ; c R\n * CSI ? Ps n\n *   Device Status Report (DSR, DEC-specific).\n *     Ps = 6  -> Report Cursor Position (CPR) [row;column] as CSI\n *     ? r ; c R (assumes page is zero).\n *     Ps = 1 5  -> Report Printer status as CSI ? 1 0  n  (ready).\n *     or CSI ? 1 1  n  (not ready).\n *     Ps = 2 5  -> Report UDK status as CSI ? 2 0  n  (unlocked)\n *     or CSI ? 2 1  n  (locked).\n *     Ps = 2 6  -> Report Keyboard status as\n *   CSI ? 2 7  ;  1  ;  0  ;  0  n  (North American).\n *   The last two parameters apply to VT400 & up, and denote key-\n *   board ready and LK01 respectively.\n *     Ps = 5 3  -> Report Locator status as\n *   CSI ? 5 3  n  Locator available, if compiled-in, or\n *   CSI ? 5 0  n  No Locator, if not.\n */\nTerminal.prototype.deviceStatus = function(params) {\n  if (!this.prefix) {\n    switch (params[0]) {\n      case 5:\n        // status report\n        this.send('\\x1b[0n');\n        break;\n      case 6:\n        // cursor position\n        this.send('\\x1b['\n                  + (this.y + 1)\n                  + ';'\n                  + (this.x + 1)\n                  + 'R');\n        break;\n    }\n  } else if (this.prefix === '?') {\n    // modern xterm doesnt seem to\n    // respond to any of these except ?6, 6, and 5\n    switch (params[0]) {\n      case 6:\n        // cursor position\n        this.send('\\x1b[?'\n                  + (this.y + 1)\n                  + ';'\n                  + (this.x + 1)\n                  + 'R');\n        break;\n      case 15:\n        // no printer\n        // this.send('\\x1b[?11n');\n        break;\n      case 25:\n        // dont support user defined keys\n        // this.send('\\x1b[?21n');\n        break;\n      case 26:\n        // north american keyboard\n        // this.send('\\x1b[?27;1;0;0n');\n        break;\n      case 53:\n        // no dec locator/mouse\n        // this.send('\\x1b[?50n');\n        break;\n    }\n  }\n};\n\n\n/**\n * Additions\n */\n\n/**\n * CSI Ps @\n * Insert Ps (Blank) Character(s) (default = 1) (ICH).\n */\nTerminal.prototype.insertChars = function(params) {\n  var param, row, j, ch;\n\n  param = params[0];\n  if (param < 1) param = 1;\n\n  row = this.y + this.ybase;\n  j = this.x;\n  ch = [this.eraseAttr(), ' ', 1]; // xterm\n\n  while (param-- && j < this.cols) {\n    this.lines[row].splice(j++, 0, ch);\n    this.lines[row].pop();\n  }\n};\n\n/**\n * CSI Ps E\n * Cursor Next Line Ps Times (default = 1) (CNL).\n * same as CSI Ps B ?\n */\nTerminal.prototype.cursorNextLine = function(params) {\n  var param = params[0];\n  if (param < 1) param = 1;\n  this.y += param;\n  if (this.y >= this.rows) {\n    this.y = this.rows - 1;\n  }\n  this.x = 0;\n};\n\n\n/**\n * CSI Ps F\n * Cursor Preceding Line Ps Times (default = 1) (CNL).\n * reuse CSI Ps A ?\n */\nTerminal.prototype.cursorPrecedingLine = function(params) {\n  var param = params[0];\n  if (param < 1) param = 1;\n  this.y -= param;\n  if (this.y < 0) this.y = 0;\n  this.x = 0;\n};\n\n\n/**\n * CSI Ps G\n * Cursor Character Absolute  [column] (default = [row,1]) (CHA).\n */\nTerminal.prototype.cursorCharAbsolute = function(params) {\n  var param = params[0];\n  if (param < 1) param = 1;\n  this.x = param - 1;\n};\n\n\n/**\n * CSI Ps L\n * Insert Ps Line(s) (default = 1) (IL).\n */\nTerminal.prototype.insertLines = function(params) {\n  var param, row, j;\n\n  param = params[0];\n  if (param < 1) param = 1;\n  row = this.y + this.ybase;\n\n  j = this.rows - 1 - this.scrollBottom;\n  j = this.rows - 1 + this.ybase - j + 1;\n\n  while (param--) {\n    // test: echo -e '\\e[44m\\e[1L\\e[0m'\n    // blankLine(true) - xterm/linux behavior\n    this.lines.splice(row, 0, this.blankLine(true));\n    this.lines.splice(j, 1);\n  }\n\n  // this.maxRange();\n  this.updateRange(this.y);\n  this.updateRange(this.scrollBottom);\n};\n\n\n/**\n * CSI Ps M\n * Delete Ps Line(s) (default = 1) (DL).\n */\nTerminal.prototype.deleteLines = function(params) {\n  var param, row, j;\n\n  param = params[0];\n  if (param < 1) param = 1;\n  row = this.y + this.ybase;\n\n  j = this.rows - 1 - this.scrollBottom;\n  j = this.rows - 1 + this.ybase - j;\n\n  while (param--) {\n    // test: echo -e '\\e[44m\\e[1M\\e[0m'\n    // blankLine(true) - xterm/linux behavior\n    this.lines.splice(j + 1, 0, this.blankLine(true));\n    this.lines.splice(row, 1);\n  }\n\n  // this.maxRange();\n  this.updateRange(this.y);\n  this.updateRange(this.scrollBottom);\n};\n\n\n/**\n * CSI Ps P\n * Delete Ps Character(s) (default = 1) (DCH).\n */\nTerminal.prototype.deleteChars = function(params) {\n  var param, row, ch;\n\n  param = params[0];\n  if (param < 1) param = 1;\n\n  row = this.y + this.ybase;\n  ch = [this.eraseAttr(), ' ', 1]; // xterm\n\n  while (param--) {\n    this.lines[row].splice(this.x, 1);\n    this.lines[row].push(ch);\n  }\n};\n\n/**\n * CSI Ps X\n * Erase Ps Character(s) (default = 1) (ECH).\n */\nTerminal.prototype.eraseChars = function(params) {\n  var param, row, j, ch;\n\n  param = params[0];\n  if (param < 1) param = 1;\n\n  row = this.y + this.ybase;\n  j = this.x;\n  ch = [this.eraseAttr(), ' ', 1]; // xterm\n\n  while (param-- && j < this.cols) {\n    this.lines[row][j++] = ch;\n  }\n};\n\n/**\n * CSI Pm `  Character Position Absolute\n *   [column] (default = [row,1]) (HPA).\n */\nTerminal.prototype.charPosAbsolute = function(params) {\n  var param = params[0];\n  if (param < 1) param = 1;\n  this.x = param - 1;\n  if (this.x >= this.cols) {\n    this.x = this.cols - 1;\n  }\n};\n\n\n/**\n * 141 61 a * HPR -\n * Horizontal Position Relative\n * reuse CSI Ps C ?\n */\nTerminal.prototype.HPositionRelative = function(params) {\n  var param = params[0];\n  if (param < 1) param = 1;\n  this.x += param;\n  if (this.x >= this.cols) {\n    this.x = this.cols - 1;\n  }\n};\n\n\n/**\n * CSI Ps c  Send Device Attributes (Primary DA).\n *     Ps = 0  or omitted -> request attributes from terminal.  The\n *     response depends on the decTerminalID resource setting.\n *     -> CSI ? 1 ; 2 c  (``VT100 with Advanced Video Option'')\n *     -> CSI ? 1 ; 0 c  (``VT101 with No Options'')\n *     -> CSI ? 6 c  (``VT102'')\n *     -> CSI ? 6 0 ; 1 ; 2 ; 6 ; 8 ; 9 ; 1 5 ; c  (``VT220'')\n *   The VT100-style response parameters do not mean anything by\n *   themselves.  VT220 parameters do, telling the host what fea-\n *   tures the terminal supports:\n *     Ps = 1  -> 132-columns.\n *     Ps = 2  -> Printer.\n *     Ps = 6  -> Selective erase.\n *     Ps = 8  -> User-defined keys.\n *     Ps = 9  -> National replacement character sets.\n *     Ps = 1 5  -> Technical characters.\n *     Ps = 2 2  -> ANSI color, e.g., VT525.\n *     Ps = 2 9  -> ANSI text locator (i.e., DEC Locator mode).\n * CSI > Ps c\n *   Send Device Attributes (Secondary DA).\n *     Ps = 0  or omitted -> request the terminal's identification\n *     code.  The response depends on the decTerminalID resource set-\n *     ting.  It should apply only to VT220 and up, but xterm extends\n *     this to VT100.\n *     -> CSI  > Pp ; Pv ; Pc c\n *   where Pp denotes the terminal type\n *     Pp = 0  -> ``VT100''.\n *     Pp = 1  -> ``VT220''.\n *   and Pv is the firmware version (for xterm, this was originally\n *   the XFree86 patch number, starting with 95).  In a DEC termi-\n *   nal, Pc indicates the ROM cartridge registration number and is\n *   always zero.\n * More information:\n *   xterm/charproc.c - line 2012, for more information.\n *   vim responds with ^[[?0c or ^[[?1c after the terminal's response (?)\n */\nTerminal.prototype.sendDeviceAttributes = function(params) {\n  if (params[0] > 0) return;\n\n  if (!this.prefix) {\n    if (this.is('xterm')\n        || this.is('rxvt-unicode')\n        || this.is('screen')) {\n      this.send('\\x1b[?1;2c');\n    } else if (this.is('linux')) {\n      this.send('\\x1b[?6c');\n    }\n  } else if (this.prefix === '>') {\n    // xterm and urxvt\n    // seem to spit this\n    // out around ~370 times (?).\n    if (this.is('xterm')) {\n      this.send('\\x1b[>0;276;0c');\n    } else if (this.is('rxvt-unicode')) {\n      this.send('\\x1b[>85;95;0c');\n    } else if (this.is('linux')) {\n      // not supported by linux console.\n      // linux console echoes parameters.\n      this.send(params[0] + 'c');\n    } else if (this.is('screen')) {\n      this.send('\\x1b[>83;40003;0c');\n    }\n  }\n};\n\n\n/**\n * CSI Pm d\n * Line Position Absolute  [row] (default = [1,column]) (VPA).\n */\nTerminal.prototype.linePosAbsolute = function(params) {\n  var param = params[0];\n  if (param < 1) param = 1;\n  this.y = param - 1;\n  if (this.y >= this.rows) {\n    this.y = this.rows - 1;\n  }\n};\n\n\n/**\n * 145 65 e * VPR - Vertical Position Relative\n * reuse CSI Ps B ?\n */\nTerminal.prototype.VPositionRelative = function(params) {\n  var param = params[0];\n  if (param < 1) param = 1;\n  this.y += param;\n  if (this.y >= this.rows) {\n    this.y = this.rows - 1;\n  }\n};\n\n\n/**\n * CSI Ps ; Ps f\n *   Horizontal and Vertical Position [row;column] (default =\n *   [1,1]) (HVP).\n */\nTerminal.prototype.HVPosition = function(params) {\n  if (params[0] < 1) params[0] = 1;\n  if (params[1] < 1) params[1] = 1;\n\n  this.y = params[0] - 1;\n  if (this.y >= this.rows) {\n    this.y = this.rows - 1;\n  }\n\n  this.x = params[1] - 1;\n  if (this.x >= this.cols) {\n    this.x = this.cols - 1;\n  }\n};\n\n\n/**\n * CSI Pm h  Set Mode (SM).\n *     Ps = 2  -> Keyboard Action Mode (AM).\n *     Ps = 4  -> Insert Mode (IRM).\n *     Ps = 1 2  -> Send/receive (SRM).\n *     Ps = 2 0  -> Automatic Newline (LNM).\n * CSI ? Pm h\n *   DEC Private Mode Set (DECSET).\n *     Ps = 1  -> Application Cursor Keys (DECCKM).\n *     Ps = 2  -> Designate USASCII for character sets G0-G3\n *     (DECANM), and set VT100 mode.\n *     Ps = 3  -> 132 Column Mode (DECCOLM).\n *     Ps = 4  -> Smooth (Slow) Scroll (DECSCLM).\n *     Ps = 5  -> Reverse Video (DECSCNM).\n *     Ps = 6  -> Origin Mode (DECOM).\n *     Ps = 7  -> Wraparound Mode (DECAWM).\n *     Ps = 8  -> Auto-repeat Keys (DECARM).\n *     Ps = 9  -> Send Mouse X & Y on button press.  See the sec-\n *     tion Mouse Tracking.\n *     Ps = 1 0  -> Show toolbar (rxvt).\n *     Ps = 1 2  -> Start Blinking Cursor (att610).\n *     Ps = 1 8  -> Print form feed (DECPFF).\n *     Ps = 1 9  -> Set print extent to full screen (DECPEX).\n *     Ps = 2 5  -> Show Cursor (DECTCEM).\n *     Ps = 3 0  -> Show scrollbar (rxvt).\n *     Ps = 3 5  -> Enable font-shifting functions (rxvt).\n *     Ps = 3 8  -> Enter Tektronix Mode (DECTEK).\n *     Ps = 4 0  -> Allow 80 -> 132 Mode.\n *     Ps = 4 1  -> more(1) fix (see curses resource).\n *     Ps = 4 2  -> Enable Nation Replacement Character sets (DECN-\n *     RCM).\n *     Ps = 4 4  -> Turn On Margin Bell.\n *     Ps = 4 5  -> Reverse-wraparound Mode.\n *     Ps = 4 6  -> Start Logging.  This is normally disabled by a\n *     compile-time option.\n *     Ps = 4 7  -> Use Alternate Screen Buffer.  (This may be dis-\n *     abled by the titeInhibit resource).\n *     Ps = 6 6  -> Application keypad (DECNKM).\n *     Ps = 6 7  -> Backarrow key sends backspace (DECBKM).\n *     Ps = 1 0 0 0  -> Send Mouse X & Y on button press and\n *     release.  See the section Mouse Tracking.\n *     Ps = 1 0 0 1  -> Use Hilite Mouse Tracking.\n *     Ps = 1 0 0 2  -> Use Cell Motion Mouse Tracking.\n *     Ps = 1 0 0 3  -> Use All Motion Mouse Tracking.\n *     Ps = 1 0 0 4  -> Send FocusIn/FocusOut events.\n *     Ps = 1 0 0 5  -> Enable Extended Mouse Mode.\n *     Ps = 1 0 1 0  -> Scroll to bottom on tty output (rxvt).\n *     Ps = 1 0 1 1  -> Scroll to bottom on key press (rxvt).\n *     Ps = 1 0 3 4  -> Interpret \"meta\" key, sets eighth bit.\n *     (enables the eightBitInput resource).\n *     Ps = 1 0 3 5  -> Enable special modifiers for Alt and Num-\n *     Lock keys.  (This enables the numLock resource).\n *     Ps = 1 0 3 6  -> Send ESC   when Meta modifies a key.  (This\n *     enables the metaSendsEscape resource).\n *     Ps = 1 0 3 7  -> Send DEL from the editing-keypad Delete\n *     key.\n *     Ps = 1 0 3 9  -> Send ESC  when Alt modifies a key.  (This\n *     enables the altSendsEscape resource).\n *     Ps = 1 0 4 0  -> Keep selection even if not highlighted.\n *     (This enables the keepSelection resource).\n *     Ps = 1 0 4 1  -> Use the CLIPBOARD selection.  (This enables\n *     the selectToClipboard resource).\n *     Ps = 1 0 4 2  -> Enable Urgency window manager hint when\n *     Control-G is received.  (This enables the bellIsUrgent\n *     resource).\n *     Ps = 1 0 4 3  -> Enable raising of the window when Control-G\n *     is received.  (enables the popOnBell resource).\n *     Ps = 1 0 4 7  -> Use Alternate Screen Buffer.  (This may be\n *     disabled by the titeInhibit resource).\n *     Ps = 1 0 4 8  -> Save cursor as in DECSC.  (This may be dis-\n *     abled by the titeInhibit resource).\n *     Ps = 1 0 4 9  -> Save cursor as in DECSC and use Alternate\n *     Screen Buffer, clearing it first.  (This may be disabled by\n *     the titeInhibit resource).  This combines the effects of the 1\n *     0 4 7  and 1 0 4 8  modes.  Use this with terminfo-based\n *     applications rather than the 4 7  mode.\n *     Ps = 1 0 5 0  -> Set terminfo/termcap function-key mode.\n *     Ps = 1 0 5 1  -> Set Sun function-key mode.\n *     Ps = 1 0 5 2  -> Set HP function-key mode.\n *     Ps = 1 0 5 3  -> Set SCO function-key mode.\n *     Ps = 1 0 6 0  -> Set legacy keyboard emulation (X11R6).\n *     Ps = 1 0 6 1  -> Set VT220 keyboard emulation.\n *     Ps = 2 0 0 4  -> Set bracketed paste mode.\n * Modes:\n *   http: *vt100.net/docs/vt220-rm/chapter4.html\n */\nTerminal.prototype.setMode = function(params) {\n  if (typeof params === 'object') {\n    var l = params.length\n    , i = 0;\n\n    for (; i < l; i++) {\n      this.setMode(params[i]);\n    }\n\n    return;\n  }\n\n  if (!this.prefix) {\n    switch (params) {\n      case 4:\n        this.insertMode = true;\n        break;\n      case 20:\n        //this.convertEol = true;\n        break;\n    }\n  } else if (this.prefix === '?') {\n    switch (params) {\n      case 1:\n        this.applicationCursor = true;\n        break;\n      case 2:\n        this.setgCharset(0, Terminal.charsets.US);\n        this.setgCharset(1, Terminal.charsets.US);\n        this.setgCharset(2, Terminal.charsets.US);\n        this.setgCharset(3, Terminal.charsets.US);\n        // set VT100 mode here\n        break;\n      case 3: // 132 col mode\n        this.savedCols = this.cols;\n        this.resize(132, this.rows);\n        break;\n      case 6:\n        this.originMode = true;\n        break;\n      case 7:\n        this.wraparoundMode = true;\n        break;\n      case 12:\n        // this.cursorBlink = true;\n        break;\n      case 66:\n        this.log('Serial port requested application keypad.');\n        this.applicationKeypad = true;\n        this.viewport.syncScrollArea();\n        break;\n      case 9: // X10 Mouse\n        // no release, no motion, no wheel, no modifiers.\n      case 1000: // vt200 mouse\n        // no motion.\n        // no modifiers, except control on the wheel.\n      case 1002: // button event mouse\n      case 1003: // any event mouse\n        // any event - sends motion events,\n        // even if there is no button held down.\n        this.x10Mouse = params === 9;\n        this.vt200Mouse = params === 1000;\n        this.normalMouse = params > 1000;\n        this.mouseEvents = true;\n        this.element.style.cursor = 'default';\n        this.log('Binding to mouse events.');\n        break;\n      case 1004: // send focusin/focusout events\n        // focusin: ^[[I\n        // focusout: ^[[O\n        this.sendFocus = true;\n        break;\n      case 1005: // utf8 ext mode mouse\n        this.utfMouse = true;\n        // for wide terminals\n        // simply encodes large values as utf8 characters\n        break;\n      case 1006: // sgr ext mode mouse\n        this.sgrMouse = true;\n        // for wide terminals\n        // does not add 32 to fields\n        // press: ^[[<b;x;yM\n        // release: ^[[<b;x;ym\n        break;\n      case 1015: // urxvt ext mode mouse\n        this.urxvtMouse = true;\n        // for wide terminals\n        // numbers for fields\n        // press: ^[[b;x;yM\n        // motion: ^[[b;x;yT\n        break;\n      case 25: // show cursor\n        this.cursorHidden = false;\n        break;\n      case 1049: // alt screen buffer cursor\n        //this.saveCursor();\n        ; // FALL-THROUGH\n      case 47: // alt screen buffer\n      case 1047: // alt screen buffer\n        if (!this.normal) {\n          var normal = {\n            lines: this.lines,\n            ybase: this.ybase,\n            ydisp: this.ydisp,\n            x: this.x,\n            y: this.y,\n            scrollTop: this.scrollTop,\n            scrollBottom: this.scrollBottom,\n            tabs: this.tabs\n            // XXX save charset(s) here?\n            // charset: this.charset,\n            // glevel: this.glevel,\n            // charsets: this.charsets\n          };\n          this.reset();\n          this.normal = normal;\n          this.showCursor();\n        }\n        break;\n    }\n  }\n};\n\n/**\n * CSI Pm l  Reset Mode (RM).\n *     Ps = 2  -> Keyboard Action Mode (AM).\n *     Ps = 4  -> Replace Mode (IRM).\n *     Ps = 1 2  -> Send/receive (SRM).\n *     Ps = 2 0  -> Normal Linefeed (LNM).\n * CSI ? Pm l\n *   DEC Private Mode Reset (DECRST).\n *     Ps = 1  -> Normal Cursor Keys (DECCKM).\n *     Ps = 2  -> Designate VT52 mode (DECANM).\n *     Ps = 3  -> 80 Column Mode (DECCOLM).\n *     Ps = 4  -> Jump (Fast) Scroll (DECSCLM).\n *     Ps = 5  -> Normal Video (DECSCNM).\n *     Ps = 6  -> Normal Cursor Mode (DECOM).\n *     Ps = 7  -> No Wraparound Mode (DECAWM).\n *     Ps = 8  -> No Auto-repeat Keys (DECARM).\n *     Ps = 9  -> Don't send Mouse X & Y on button press.\n *     Ps = 1 0  -> Hide toolbar (rxvt).\n *     Ps = 1 2  -> Stop Blinking Cursor (att610).\n *     Ps = 1 8  -> Don't print form feed (DECPFF).\n *     Ps = 1 9  -> Limit print to scrolling region (DECPEX).\n *     Ps = 2 5  -> Hide Cursor (DECTCEM).\n *     Ps = 3 0  -> Don't show scrollbar (rxvt).\n *     Ps = 3 5  -> Disable font-shifting functions (rxvt).\n *     Ps = 4 0  -> Disallow 80 -> 132 Mode.\n *     Ps = 4 1  -> No more(1) fix (see curses resource).\n *     Ps = 4 2  -> Disable Nation Replacement Character sets (DEC-\n *     NRCM).\n *     Ps = 4 4  -> Turn Off Margin Bell.\n *     Ps = 4 5  -> No Reverse-wraparound Mode.\n *     Ps = 4 6  -> Stop Logging.  (This is normally disabled by a\n *     compile-time option).\n *     Ps = 4 7  -> Use Normal Screen Buffer.\n *     Ps = 6 6  -> Numeric keypad (DECNKM).\n *     Ps = 6 7  -> Backarrow key sends delete (DECBKM).\n *     Ps = 1 0 0 0  -> Don't send Mouse X & Y on button press and\n *     release.  See the section Mouse Tracking.\n *     Ps = 1 0 0 1  -> Don't use Hilite Mouse Tracking.\n *     Ps = 1 0 0 2  -> Don't use Cell Motion Mouse Tracking.\n *     Ps = 1 0 0 3  -> Don't use All Motion Mouse Tracking.\n *     Ps = 1 0 0 4  -> Don't send FocusIn/FocusOut events.\n *     Ps = 1 0 0 5  -> Disable Extended Mouse Mode.\n *     Ps = 1 0 1 0  -> Don't scroll to bottom on tty output\n *     (rxvt).\n *     Ps = 1 0 1 1  -> Don't scroll to bottom on key press (rxvt).\n *     Ps = 1 0 3 4  -> Don't interpret \"meta\" key.  (This disables\n *     the eightBitInput resource).\n *     Ps = 1 0 3 5  -> Disable special modifiers for Alt and Num-\n *     Lock keys.  (This disables the numLock resource).\n *     Ps = 1 0 3 6  -> Don't send ESC  when Meta modifies a key.\n *     (This disables the metaSendsEscape resource).\n *     Ps = 1 0 3 7  -> Send VT220 Remove from the editing-keypad\n *     Delete key.\n *     Ps = 1 0 3 9  -> Don't send ESC  when Alt modifies a key.\n *     (This disables the altSendsEscape resource).\n *     Ps = 1 0 4 0  -> Do not keep selection when not highlighted.\n *     (This disables the keepSelection resource).\n *     Ps = 1 0 4 1  -> Use the PRIMARY selection.  (This disables\n *     the selectToClipboard resource).\n *     Ps = 1 0 4 2  -> Disable Urgency window manager hint when\n *     Control-G is received.  (This disables the bellIsUrgent\n *     resource).\n *     Ps = 1 0 4 3  -> Disable raising of the window when Control-\n *     G is received.  (This disables the popOnBell resource).\n *     Ps = 1 0 4 7  -> Use Normal Screen Buffer, clearing screen\n *     first if in the Alternate Screen.  (This may be disabled by\n *     the titeInhibit resource).\n *     Ps = 1 0 4 8  -> Restore cursor as in DECRC.  (This may be\n *     disabled by the titeInhibit resource).\n *     Ps = 1 0 4 9  -> Use Normal Screen Buffer and restore cursor\n *     as in DECRC.  (This may be disabled by the titeInhibit\n *     resource).  This combines the effects of the 1 0 4 7  and 1 0\n *     4 8  modes.  Use this with terminfo-based applications rather\n *     than the 4 7  mode.\n *     Ps = 1 0 5 0  -> Reset terminfo/termcap function-key mode.\n *     Ps = 1 0 5 1  -> Reset Sun function-key mode.\n *     Ps = 1 0 5 2  -> Reset HP function-key mode.\n *     Ps = 1 0 5 3  -> Reset SCO function-key mode.\n *     Ps = 1 0 6 0  -> Reset legacy keyboard emulation (X11R6).\n *     Ps = 1 0 6 1  -> Reset keyboard emulation to Sun/PC style.\n *     Ps = 2 0 0 4  -> Reset bracketed paste mode.\n */\nTerminal.prototype.resetMode = function(params) {\n  if (typeof params === 'object') {\n    var l = params.length\n    , i = 0;\n\n    for (; i < l; i++) {\n      this.resetMode(params[i]);\n    }\n\n    return;\n  }\n\n  if (!this.prefix) {\n    switch (params) {\n      case 4:\n        this.insertMode = false;\n        break;\n      case 20:\n        //this.convertEol = false;\n        break;\n    }\n  } else if (this.prefix === '?') {\n    switch (params) {\n      case 1:\n        this.applicationCursor = false;\n        break;\n      case 3:\n        if (this.cols === 132 && this.savedCols) {\n          this.resize(this.savedCols, this.rows);\n        }\n        delete this.savedCols;\n        break;\n      case 6:\n        this.originMode = false;\n        break;\n      case 7:\n        this.wraparoundMode = false;\n        break;\n      case 12:\n        // this.cursorBlink = false;\n        break;\n      case 66:\n        this.log('Switching back to normal keypad.');\n        this.applicationKeypad = false;\n        this.viewport.syncScrollArea();\n        break;\n      case 9: // X10 Mouse\n      case 1000: // vt200 mouse\n      case 1002: // button event mouse\n      case 1003: // any event mouse\n        this.x10Mouse = false;\n        this.vt200Mouse = false;\n        this.normalMouse = false;\n        this.mouseEvents = false;\n        this.element.style.cursor = '';\n        break;\n      case 1004: // send focusin/focusout events\n        this.sendFocus = false;\n        break;\n      case 1005: // utf8 ext mode mouse\n        this.utfMouse = false;\n        break;\n      case 1006: // sgr ext mode mouse\n        this.sgrMouse = false;\n        break;\n      case 1015: // urxvt ext mode mouse\n        this.urxvtMouse = false;\n        break;\n      case 25: // hide cursor\n        this.cursorHidden = true;\n        break;\n      case 1049: // alt screen buffer cursor\n        ; // FALL-THROUGH\n      case 47: // normal screen buffer\n      case 1047: // normal screen buffer - clearing it first\n        if (this.normal) {\n          this.lines = this.normal.lines;\n          this.ybase = this.normal.ybase;\n          this.ydisp = this.normal.ydisp;\n          this.x = this.normal.x;\n          this.y = this.normal.y;\n          this.scrollTop = this.normal.scrollTop;\n          this.scrollBottom = this.normal.scrollBottom;\n          this.tabs = this.normal.tabs;\n          this.normal = null;\n          // if (params === 1049) {\n          //   this.x = this.savedX;\n          //   this.y = this.savedY;\n          // }\n          this.refresh(0, this.rows - 1);\n          this.showCursor();\n        }\n        break;\n    }\n  }\n};\n\n\n/**\n * CSI Ps ; Ps r\n *   Set Scrolling Region [top;bottom] (default = full size of win-\n *   dow) (DECSTBM).\n * CSI ? Pm r\n */\nTerminal.prototype.setScrollRegion = function(params) {\n  if (this.prefix) return;\n  this.scrollTop = (params[0] || 1) - 1;\n  this.scrollBottom = (params[1] || this.rows) - 1;\n  this.x = 0;\n  this.y = 0;\n};\n\n\n/**\n * CSI s\n *   Save cursor (ANSI.SYS).\n */\nTerminal.prototype.saveCursor = function(params) {\n  this.savedX = this.x;\n  this.savedY = this.y;\n};\n\n\n/**\n * CSI u\n *   Restore cursor (ANSI.SYS).\n */\nTerminal.prototype.restoreCursor = function(params) {\n  this.x = this.savedX || 0;\n  this.y = this.savedY || 0;\n};\n\n\n/**\n * Lesser Used\n */\n\n/**\n * CSI Ps I\n *   Cursor Forward Tabulation Ps tab stops (default = 1) (CHT).\n */\nTerminal.prototype.cursorForwardTab = function(params) {\n  var param = params[0] || 1;\n  while (param--) {\n    this.x = this.nextStop();\n  }\n};\n\n\n/**\n * CSI Ps S  Scroll up Ps lines (default = 1) (SU).\n */\nTerminal.prototype.scrollUp = function(params) {\n  var param = params[0] || 1;\n  while (param--) {\n    this.lines.splice(this.ybase + this.scrollTop, 1);\n    this.lines.splice(this.ybase + this.scrollBottom, 0, this.blankLine());\n  }\n  // this.maxRange();\n  this.updateRange(this.scrollTop);\n  this.updateRange(this.scrollBottom);\n};\n\n\n/**\n * CSI Ps T  Scroll down Ps lines (default = 1) (SD).\n */\nTerminal.prototype.scrollDown = function(params) {\n  var param = params[0] || 1;\n  while (param--) {\n    this.lines.splice(this.ybase + this.scrollBottom, 1);\n    this.lines.splice(this.ybase + this.scrollTop, 0, this.blankLine());\n  }\n  // this.maxRange();\n  this.updateRange(this.scrollTop);\n  this.updateRange(this.scrollBottom);\n};\n\n\n/**\n * CSI Ps ; Ps ; Ps ; Ps ; Ps T\n *   Initiate highlight mouse tracking.  Parameters are\n *   [func;startx;starty;firstrow;lastrow].  See the section Mouse\n *   Tracking.\n */\nTerminal.prototype.initMouseTracking = function(params) {\n  // Relevant: DECSET 1001\n};\n\n\n/**\n * CSI > Ps; Ps T\n *   Reset one or more features of the title modes to the default\n *   value.  Normally, \"reset\" disables the feature.  It is possi-\n *   ble to disable the ability to reset features by compiling a\n *   different default for the title modes into xterm.\n *     Ps = 0  -> Do not set window/icon labels using hexadecimal.\n *     Ps = 1  -> Do not query window/icon labels using hexadeci-\n *     mal.\n *     Ps = 2  -> Do not set window/icon labels using UTF-8.\n *     Ps = 3  -> Do not query window/icon labels using UTF-8.\n *   (See discussion of \"Title Modes\").\n */\nTerminal.prototype.resetTitleModes = function(params) {\n  ;\n};\n\n\n/**\n * CSI Ps Z  Cursor Backward Tabulation Ps tab stops (default = 1) (CBT).\n */\nTerminal.prototype.cursorBackwardTab = function(params) {\n  var param = params[0] || 1;\n  while (param--) {\n    this.x = this.prevStop();\n  }\n};\n\n\n/**\n * CSI Ps b  Repeat the preceding graphic character Ps times (REP).\n */\nTerminal.prototype.repeatPrecedingCharacter = function(params) {\n  var param = params[0] || 1\n  , line = this.lines[this.ybase + this.y]\n  , ch = line[this.x - 1] || [this.defAttr, ' ', 1];\n\n  while (param--) line[this.x++] = ch;\n};\n\n\n/**\n * CSI Ps g  Tab Clear (TBC).\n *     Ps = 0  -> Clear Current Column (default).\n *     Ps = 3  -> Clear All.\n * Potentially:\n *   Ps = 2  -> Clear Stops on Line.\n *   http://vt100.net/annarbor/aaa-ug/section6.html\n */\nTerminal.prototype.tabClear = function(params) {\n  var param = params[0];\n  if (param <= 0) {\n    delete this.tabs[this.x];\n  } else if (param === 3) {\n    this.tabs = {};\n  }\n};\n\n\n/**\n * CSI Pm i  Media Copy (MC).\n *     Ps = 0  -> Print screen (default).\n *     Ps = 4  -> Turn off printer controller mode.\n *     Ps = 5  -> Turn on printer controller mode.\n * CSI ? Pm i\n *   Media Copy (MC, DEC-specific).\n *     Ps = 1  -> Print line containing cursor.\n *     Ps = 4  -> Turn off autoprint mode.\n *     Ps = 5  -> Turn on autoprint mode.\n *     Ps = 1  0  -> Print composed display, ignores DECPEX.\n *     Ps = 1  1  -> Print all pages.\n */\nTerminal.prototype.mediaCopy = function(params) {\n  ;\n};\n\n\n/**\n * CSI > Ps; Ps m\n *   Set or reset resource-values used by xterm to decide whether\n *   to construct escape sequences holding information about the\n *   modifiers pressed with a given key.  The first parameter iden-\n *   tifies the resource to set/reset.  The second parameter is the\n *   value to assign to the resource.  If the second parameter is\n *   omitted, the resource is reset to its initial value.\n *     Ps = 1  -> modifyCursorKeys.\n *     Ps = 2  -> modifyFunctionKeys.\n *     Ps = 4  -> modifyOtherKeys.\n *   If no parameters are given, all resources are reset to their\n *   initial values.\n */\nTerminal.prototype.setResources = function(params) {\n  ;\n};\n\n\n/**\n * CSI > Ps n\n *   Disable modifiers which may be enabled via the CSI > Ps; Ps m\n *   sequence.  This corresponds to a resource value of \"-1\", which\n *   cannot be set with the other sequence.  The parameter identi-\n *   fies the resource to be disabled:\n *     Ps = 1  -> modifyCursorKeys.\n *     Ps = 2  -> modifyFunctionKeys.\n *     Ps = 4  -> modifyOtherKeys.\n *   If the parameter is omitted, modifyFunctionKeys is disabled.\n *   When modifyFunctionKeys is disabled, xterm uses the modifier\n *   keys to make an extended sequence of functions rather than\n *   adding a parameter to each function key to denote the modi-\n *   fiers.\n */\nTerminal.prototype.disableModifiers = function(params) {\n  ;\n};\n\n\n/**\n * CSI > Ps p\n *   Set resource value pointerMode.  This is used by xterm to\n *   decide whether to hide the pointer cursor as the user types.\n *   Valid values for the parameter:\n *     Ps = 0  -> never hide the pointer.\n *     Ps = 1  -> hide if the mouse tracking mode is not enabled.\n *     Ps = 2  -> always hide the pointer.  If no parameter is\n *     given, xterm uses the default, which is 1 .\n */\nTerminal.prototype.setPointerMode = function(params) {\n  ;\n};\n\n\n/**\n * CSI ! p   Soft terminal reset (DECSTR).\n * http://vt100.net/docs/vt220-rm/table4-10.html\n */\nTerminal.prototype.softReset = function(params) {\n  this.cursorHidden = false;\n  this.insertMode = false;\n  this.originMode = false;\n  this.wraparoundMode = false; // autowrap\n  this.applicationKeypad = false; // ?\n  this.viewport.syncScrollArea();\n  this.applicationCursor = false;\n  this.scrollTop = 0;\n  this.scrollBottom = this.rows - 1;\n  this.curAttr = this.defAttr;\n  this.x = this.y = 0; // ?\n  this.charset = null;\n  this.glevel = 0; // ??\n  this.charsets = [null]; // ??\n};\n\n\n/**\n * CSI Ps$ p\n *   Request ANSI mode (DECRQM).  For VT300 and up, reply is\n *     CSI Ps; Pm$ y\n *   where Ps is the mode number as in RM, and Pm is the mode\n *   value:\n *     0 - not recognized\n *     1 - set\n *     2 - reset\n *     3 - permanently set\n *     4 - permanently reset\n */\nTerminal.prototype.requestAnsiMode = function(params) {\n  ;\n};\n\n\n/**\n * CSI ? Ps$ p\n *   Request DEC private mode (DECRQM).  For VT300 and up, reply is\n *     CSI ? Ps; Pm$ p\n *   where Ps is the mode number as in DECSET, Pm is the mode value\n *   as in the ANSI DECRQM.\n */\nTerminal.prototype.requestPrivateMode = function(params) {\n  ;\n};\n\n\n/**\n * CSI Ps ; Ps \" p\n *   Set conformance level (DECSCL).  Valid values for the first\n *   parameter:\n *     Ps = 6 1  -> VT100.\n *     Ps = 6 2  -> VT200.\n *     Ps = 6 3  -> VT300.\n *   Valid values for the second parameter:\n *     Ps = 0  -> 8-bit controls.\n *     Ps = 1  -> 7-bit controls (always set for VT100).\n *     Ps = 2  -> 8-bit controls.\n */\nTerminal.prototype.setConformanceLevel = function(params) {\n  ;\n};\n\n\n/**\n * CSI Ps q  Load LEDs (DECLL).\n *     Ps = 0  -> Clear all LEDS (default).\n *     Ps = 1  -> Light Num Lock.\n *     Ps = 2  -> Light Caps Lock.\n *     Ps = 3  -> Light Scroll Lock.\n *     Ps = 2  1  -> Extinguish Num Lock.\n *     Ps = 2  2  -> Extinguish Caps Lock.\n *     Ps = 2  3  -> Extinguish Scroll Lock.\n */\nTerminal.prototype.loadLEDs = function(params) {\n  ;\n};\n\n\n/**\n * CSI Ps SP q\n *   Set cursor style (DECSCUSR, VT520).\n *     Ps = 0  -> blinking block.\n *     Ps = 1  -> blinking block (default).\n *     Ps = 2  -> steady block.\n *     Ps = 3  -> blinking underline.\n *     Ps = 4  -> steady underline.\n */\nTerminal.prototype.setCursorStyle = function(params) {\n  ;\n};\n\n\n/**\n * CSI Ps \" q\n *   Select character protection attribute (DECSCA).  Valid values\n *   for the parameter:\n *     Ps = 0  -> DECSED and DECSEL can erase (default).\n *     Ps = 1  -> DECSED and DECSEL cannot erase.\n *     Ps = 2  -> DECSED and DECSEL can erase.\n */\nTerminal.prototype.setCharProtectionAttr = function(params) {\n  ;\n};\n\n\n/**\n * CSI ? Pm r\n *   Restore DEC Private Mode Values.  The value of Ps previously\n *   saved is restored.  Ps values are the same as for DECSET.\n */\nTerminal.prototype.restorePrivateValues = function(params) {\n  ;\n};\n\n\n/**\n * CSI Pt; Pl; Pb; Pr; Ps$ r\n *   Change Attributes in Rectangular Area (DECCARA), VT400 and up.\n *     Pt; Pl; Pb; Pr denotes the rectangle.\n *     Ps denotes the SGR attributes to change: 0, 1, 4, 5, 7.\n * NOTE: xterm doesn't enable this code by default.\n */\nTerminal.prototype.setAttrInRectangle = function(params) {\n  var t = params[0]\n  , l = params[1]\n  , b = params[2]\n  , r = params[3]\n  , attr = params[4];\n\n  var line\n  , i;\n\n  for (; t < b + 1; t++) {\n    line = this.lines[this.ybase + t];\n    for (i = l; i < r; i++) {\n      line[i] = [attr, line[i][1]];\n    }\n  }\n\n  // this.maxRange();\n  this.updateRange(params[0]);\n  this.updateRange(params[2]);\n};\n\n\n/**\n * CSI Pc; Pt; Pl; Pb; Pr$ x\n *   Fill Rectangular Area (DECFRA), VT420 and up.\n *     Pc is the character to use.\n *     Pt; Pl; Pb; Pr denotes the rectangle.\n * NOTE: xterm doesn't enable this code by default.\n */\nTerminal.prototype.fillRectangle = function(params) {\n  var ch = params[0]\n  , t = params[1]\n  , l = params[2]\n  , b = params[3]\n  , r = params[4];\n\n  var line\n  , i;\n\n  for (; t < b + 1; t++) {\n    line = this.lines[this.ybase + t];\n    for (i = l; i < r; i++) {\n      line[i] = [line[i][0], String.fromCharCode(ch)];\n    }\n  }\n\n  // this.maxRange();\n  this.updateRange(params[1]);\n  this.updateRange(params[3]);\n};\n\n\n/**\n * CSI Ps ; Pu ' z\n *   Enable Locator Reporting (DECELR).\n *   Valid values for the first parameter:\n *     Ps = 0  -> Locator disabled (default).\n *     Ps = 1  -> Locator enabled.\n *     Ps = 2  -> Locator enabled for one report, then disabled.\n *   The second parameter specifies the coordinate unit for locator\n *   reports.\n *   Valid values for the second parameter:\n *     Pu = 0  <- or omitted -> default to character cells.\n *     Pu = 1  <- device physical pixels.\n *     Pu = 2  <- character cells.\n */\nTerminal.prototype.enableLocatorReporting = function(params) {\n  var val = params[0] > 0;\n  //this.mouseEvents = val;\n  //this.decLocator = val;\n};\n\n\n/**\n * CSI Pt; Pl; Pb; Pr$ z\n *   Erase Rectangular Area (DECERA), VT400 and up.\n *     Pt; Pl; Pb; Pr denotes the rectangle.\n * NOTE: xterm doesn't enable this code by default.\n */\nTerminal.prototype.eraseRectangle = function(params) {\n  var t = params[0]\n  , l = params[1]\n  , b = params[2]\n  , r = params[3];\n\n  var line\n  , i\n  , ch;\n\n  ch = [this.eraseAttr(), ' ', 1]; // xterm?\n\n  for (; t < b + 1; t++) {\n    line = this.lines[this.ybase + t];\n    for (i = l; i < r; i++) {\n      line[i] = ch;\n    }\n  }\n\n  // this.maxRange();\n  this.updateRange(params[0]);\n  this.updateRange(params[2]);\n};\n\n\n/**\n * CSI P m SP }\n * Insert P s Column(s) (default = 1) (DECIC), VT420 and up.\n * NOTE: xterm doesn't enable this code by default.\n */\nTerminal.prototype.insertColumns = function() {\n  var param = params[0]\n  , l = this.ybase + this.rows\n  , ch = [this.eraseAttr(), ' ', 1] // xterm?\n  , i;\n\n  while (param--) {\n    for (i = this.ybase; i < l; i++) {\n      this.lines[i].splice(this.x + 1, 0, ch);\n      this.lines[i].pop();\n    }\n  }\n\n  this.maxRange();\n};\n\n\n/**\n * CSI P m SP ~\n * Delete P s Column(s) (default = 1) (DECDC), VT420 and up\n * NOTE: xterm doesn't enable this code by default.\n */\nTerminal.prototype.deleteColumns = function() {\n  var param = params[0]\n  , l = this.ybase + this.rows\n  , ch = [this.eraseAttr(), ' ', 1] // xterm?\n  , i;\n\n  while (param--) {\n    for (i = this.ybase; i < l; i++) {\n      this.lines[i].splice(this.x, 1);\n      this.lines[i].push(ch);\n    }\n  }\n\n  this.maxRange();\n};\n\n/**\n * Character Sets\n */\n\nTerminal.charsets = {};\n\n// DEC Special Character and Line Drawing Set.\n// http://vt100.net/docs/vt102-ug/table5-13.html\n// A lot of curses apps use this if they see TERM=xterm.\n// testing: echo -e '\\e(0a\\e(B'\n// The xterm output sometimes seems to conflict with the\n// reference above. xterm seems in line with the reference\n// when running vttest however.\n// The table below now uses xterm's output from vttest.\nTerminal.charsets.SCLD = { // (0\n  '`': '\\u25c6', // '◆'\n  'a': '\\u2592', // '▒'\n  'b': '\\u0009', // '\\t'\n  'c': '\\u000c', // '\\f'\n  'd': '\\u000d', // '\\r'\n  'e': '\\u000a', // '\\n'\n  'f': '\\u00b0', // '°'\n  'g': '\\u00b1', // '±'\n  'h': '\\u2424', // '\\u2424' (NL)\n  'i': '\\u000b', // '\\v'\n  'j': '\\u2518', // '┘'\n  'k': '\\u2510', // '┐'\n  'l': '\\u250c', // '┌'\n  'm': '\\u2514', // '└'\n  'n': '\\u253c', // '┼'\n  'o': '\\u23ba', // '⎺'\n  'p': '\\u23bb', // '⎻'\n  'q': '\\u2500', // '─'\n  'r': '\\u23bc', // '⎼'\n  's': '\\u23bd', // '⎽'\n  't': '\\u251c', // '├'\n  'u': '\\u2524', // '┤'\n  'v': '\\u2534', // '┴'\n  'w': '\\u252c', // '┬'\n  'x': '\\u2502', // '│'\n  'y': '\\u2264', // '≤'\n  'z': '\\u2265', // '≥'\n  '{': '\\u03c0', // 'π'\n  '|': '\\u2260', // '≠'\n  '}': '\\u00a3', // '£'\n  '~': '\\u00b7'  // '·'\n};\n\nTerminal.charsets.UK = null; // (A\nTerminal.charsets.US = null; // (B (USASCII)\nTerminal.charsets.Dutch = null; // (4\nTerminal.charsets.Finnish = null; // (C or (5\nTerminal.charsets.French = null; // (R\nTerminal.charsets.FrenchCanadian = null; // (Q\nTerminal.charsets.German = null; // (K\nTerminal.charsets.Italian = null; // (Y\nTerminal.charsets.NorwegianDanish = null; // (E or (6\nTerminal.charsets.Spanish = null; // (Z\nTerminal.charsets.Swedish = null; // (H or (7\nTerminal.charsets.Swiss = null; // (=\nTerminal.charsets.ISOLatin = null; // /A\n\n/**\n * Helpers\n */\n\nfunction on(el, type, handler, capture) {\n  if (!Array.isArray(el)) {\n    el = [el];\n  }\n  el.forEach(function (element) {\n    element.addEventListener(type, handler, capture || false);\n  });\n}\n\nfunction off(el, type, handler, capture) {\n  el.removeEventListener(type, handler, capture || false);\n}\n\nfunction cancel(ev, force) {\n  if (!this.cancelEvents && !force) {\n    return;\n  }\n  ev.preventDefault();\n  ev.stopPropagation();\n  return false;\n}\n\nfunction inherits(child, parent) {\n  function f() {\n    this.constructor = child;\n  }\n  f.prototype = parent.prototype;\n  child.prototype = new f;\n}\n\n// if bold is broken, we can't\n// use it in the terminal.\nfunction isBoldBroken(document) {\n  var body = document.getElementsByTagName('body')[0];\n  var el = document.createElement('span');\n  el.innerHTML = 'hello world';\n  body.appendChild(el);\n  var w1 = el.scrollWidth;\n  el.style.fontWeight = 'bold';\n  var w2 = el.scrollWidth;\n  body.removeChild(el);\n  return w1 !== w2;\n}\n\nfunction indexOf(obj, el) {\n  var i = obj.length;\n  while (i--) {\n    if (obj[i] === el) return i;\n  }\n  return -1;\n}\n\nfunction isThirdLevelShift(term, ev) {\n  var thirdLevelKey =\n      (term.browser.isMac && ev.altKey && !ev.ctrlKey && !ev.metaKey) ||\n      (term.browser.isMSWindows && ev.altKey && ev.ctrlKey && !ev.metaKey);\n\n  if (ev.type == 'keypress') {\n    return thirdLevelKey;\n  }\n\n  // Don't invoke for arrows, pageDown, home, backspace, etc. (on non-keypress events)\n  return thirdLevelKey && (!ev.keyCode || ev.keyCode > 47);\n}\n\nfunction matchColor(r1, g1, b1) {\n  var hash = (r1 << 16) | (g1 << 8) | b1;\n\n  if (matchColor._cache[hash] != null) {\n    return matchColor._cache[hash];\n  }\n\n  var ldiff = Infinity\n  , li = -1\n  , i = 0\n  , c\n  , r2\n  , g2\n  , b2\n  , diff;\n\n  for (; i < Terminal.vcolors.length; i++) {\n    c = Terminal.vcolors[i];\n    r2 = c[0];\n    g2 = c[1];\n    b2 = c[2];\n\n    diff = matchColor.distance(r1, g1, b1, r2, g2, b2);\n\n    if (diff === 0) {\n      li = i;\n      break;\n    }\n\n    if (diff < ldiff) {\n      ldiff = diff;\n      li = i;\n    }\n  }\n\n  return matchColor._cache[hash] = li;\n}\n\nmatchColor._cache = {};\n\n// http://stackoverflow.com/questions/1633828\nmatchColor.distance = function(r1, g1, b1, r2, g2, b2) {\n  return Math.pow(30 * (r1 - r2), 2)\n    + Math.pow(59 * (g1 - g2), 2)\n    + Math.pow(11 * (b1 - b2), 2);\n};\n\nfunction each(obj, iter, con) {\n  if (obj.forEach) return obj.forEach(iter, con);\n  for (var i = 0; i < obj.length; i++) {\n    iter.call(con, obj[i], i, obj);\n  }\n}\n\nfunction keys(obj) {\n  if (Object.keys) return Object.keys(obj);\n  var key, keys = [];\n  for (key in obj) {\n    if (Object.prototype.hasOwnProperty.call(obj, key)) {\n      keys.push(key);\n    }\n  }\n  return keys;\n}\n\nvar wcwidth = (function(opts) {\n  // extracted from https://www.cl.cam.ac.uk/%7Emgk25/ucs/wcwidth.c\n  // combining characters\n  var COMBINING = [\n    [0x0300, 0x036F], [0x0483, 0x0486], [0x0488, 0x0489],\n    [0x0591, 0x05BD], [0x05BF, 0x05BF], [0x05C1, 0x05C2],\n    [0x05C4, 0x05C5], [0x05C7, 0x05C7], [0x0600, 0x0603],\n    [0x0610, 0x0615], [0x064B, 0x065E], [0x0670, 0x0670],\n    [0x06D6, 0x06E4], [0x06E7, 0x06E8], [0x06EA, 0x06ED],\n    [0x070F, 0x070F], [0x0711, 0x0711], [0x0730, 0x074A],\n    [0x07A6, 0x07B0], [0x07EB, 0x07F3], [0x0901, 0x0902],\n    [0x093C, 0x093C], [0x0941, 0x0948], [0x094D, 0x094D],\n    [0x0951, 0x0954], [0x0962, 0x0963], [0x0981, 0x0981],\n    [0x09BC, 0x09BC], [0x09C1, 0x09C4], [0x09CD, 0x09CD],\n    [0x09E2, 0x09E3], [0x0A01, 0x0A02], [0x0A3C, 0x0A3C],\n    [0x0A41, 0x0A42], [0x0A47, 0x0A48], [0x0A4B, 0x0A4D],\n    [0x0A70, 0x0A71], [0x0A81, 0x0A82], [0x0ABC, 0x0ABC],\n    [0x0AC1, 0x0AC5], [0x0AC7, 0x0AC8], [0x0ACD, 0x0ACD],\n    [0x0AE2, 0x0AE3], [0x0B01, 0x0B01], [0x0B3C, 0x0B3C],\n    [0x0B3F, 0x0B3F], [0x0B41, 0x0B43], [0x0B4D, 0x0B4D],\n    [0x0B56, 0x0B56], [0x0B82, 0x0B82], [0x0BC0, 0x0BC0],\n    [0x0BCD, 0x0BCD], [0x0C3E, 0x0C40], [0x0C46, 0x0C48],\n    [0x0C4A, 0x0C4D], [0x0C55, 0x0C56], [0x0CBC, 0x0CBC],\n    [0x0CBF, 0x0CBF], [0x0CC6, 0x0CC6], [0x0CCC, 0x0CCD],\n    [0x0CE2, 0x0CE3], [0x0D41, 0x0D43], [0x0D4D, 0x0D4D],\n    [0x0DCA, 0x0DCA], [0x0DD2, 0x0DD4], [0x0DD6, 0x0DD6],\n    [0x0E31, 0x0E31], [0x0E34, 0x0E3A], [0x0E47, 0x0E4E],\n    [0x0EB1, 0x0EB1], [0x0EB4, 0x0EB9], [0x0EBB, 0x0EBC],\n    [0x0EC8, 0x0ECD], [0x0F18, 0x0F19], [0x0F35, 0x0F35],\n    [0x0F37, 0x0F37], [0x0F39, 0x0F39], [0x0F71, 0x0F7E],\n    [0x0F80, 0x0F84], [0x0F86, 0x0F87], [0x0F90, 0x0F97],\n    [0x0F99, 0x0FBC], [0x0FC6, 0x0FC6], [0x102D, 0x1030],\n    [0x1032, 0x1032], [0x1036, 0x1037], [0x1039, 0x1039],\n    [0x1058, 0x1059], [0x1160, 0x11FF], [0x135F, 0x135F],\n    [0x1712, 0x1714], [0x1732, 0x1734], [0x1752, 0x1753],\n    [0x1772, 0x1773], [0x17B4, 0x17B5], [0x17B7, 0x17BD],\n    [0x17C6, 0x17C6], [0x17C9, 0x17D3], [0x17DD, 0x17DD],\n    [0x180B, 0x180D], [0x18A9, 0x18A9], [0x1920, 0x1922],\n    [0x1927, 0x1928], [0x1932, 0x1932], [0x1939, 0x193B],\n    [0x1A17, 0x1A18], [0x1B00, 0x1B03], [0x1B34, 0x1B34],\n    [0x1B36, 0x1B3A], [0x1B3C, 0x1B3C], [0x1B42, 0x1B42],\n    [0x1B6B, 0x1B73], [0x1DC0, 0x1DCA], [0x1DFE, 0x1DFF],\n    [0x200B, 0x200F], [0x202A, 0x202E], [0x2060, 0x2063],\n    [0x206A, 0x206F], [0x20D0, 0x20EF], [0x302A, 0x302F],\n    [0x3099, 0x309A], [0xA806, 0xA806], [0xA80B, 0xA80B],\n    [0xA825, 0xA826], [0xFB1E, 0xFB1E], [0xFE00, 0xFE0F],\n    [0xFE20, 0xFE23], [0xFEFF, 0xFEFF], [0xFFF9, 0xFFFB],\n    [0x10A01, 0x10A03], [0x10A05, 0x10A06], [0x10A0C, 0x10A0F],\n    [0x10A38, 0x10A3A], [0x10A3F, 0x10A3F], [0x1D167, 0x1D169],\n    [0x1D173, 0x1D182], [0x1D185, 0x1D18B], [0x1D1AA, 0x1D1AD],\n    [0x1D242, 0x1D244], [0xE0001, 0xE0001], [0xE0020, 0xE007F],\n    [0xE0100, 0xE01EF]\n  ];\n  // binary search\n  function bisearch(ucs) {\n    var min = 0;\n    var max = COMBINING.length - 1;\n    var mid;\n    if (ucs < COMBINING[0][0] || ucs > COMBINING[max][1])\n      return false;\n    while (max >= min) {\n      mid = Math.floor((min + max) / 2);\n      if (ucs > COMBINING[mid][1])\n        min = mid + 1;\n      else if (ucs < COMBINING[mid][0])\n        max = mid - 1;\n      else\n        return true;\n    }\n    return false;\n  }\n  function wcwidth(ucs) {\n    // test for 8-bit control characters\n    if (ucs === 0)\n      return opts.nul;\n    if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0))\n      return opts.control;\n    // binary search in table of non-spacing characters\n    if (bisearch(ucs))\n      return 0;\n    // if we arrive here, ucs is not a combining or C0/C1 control character\n    return 1 +\n      (\n      ucs >= 0x1100 &&\n      (\n        ucs <= 0x115f ||                // Hangul Jamo init. consonants\n        ucs == 0x2329 ||\n        ucs == 0x232a ||\n        (ucs >= 0x2e80 && ucs <= 0xa4cf && ucs != 0x303f) ||  // CJK..Yi\n        (ucs >= 0xac00 && ucs <= 0xd7a3) ||    // Hangul Syllables\n        (ucs >= 0xf900 && ucs <= 0xfaff) ||    // CJK Compat Ideographs\n        (ucs >= 0xfe10 && ucs <= 0xfe19) ||    // Vertical forms\n        (ucs >= 0xfe30 && ucs <= 0xfe6f) ||    // CJK Compat Forms\n        (ucs >= 0xff00 && ucs <= 0xff60) ||    // Fullwidth Forms\n        (ucs >= 0xffe0 && ucs <= 0xffe6) ||\n        (ucs >= 0x20000 && ucs <= 0x2fffd) ||\n        (ucs >= 0x30000 && ucs <= 0x3fffd)\n      )\n    );\n  }\n  return wcwidth;\n})({nul: 0, control: 0});  // configurable options\n\n/**\n * Expose\n */\n\nTerminal.EventEmitter = EventEmitter;\nTerminal.CompositionHelper = CompositionHelper;\nTerminal.Viewport = Viewport;\nTerminal.inherits = inherits;\n\n/**\n * Adds an event listener to the terminal.\n *\n * @param {string} event The name of the event. TODO: Document all event types\n * @param {function} callback The function to call when the event is triggered.\n */\nTerminal.on = on;\nTerminal.off = off;\nTerminal.cancel = cancel;\n\nmodule.exports = Terminal;\n"
  ]
}