Issue 5751 - Removing legacy gecko support

lib/keySelector.js

-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-Cu.import("resource://gre/modules/Services.jsm");
-
-let validModifiers = Object.create(null);
-validModifiers.ACCEL = null;
-validModifiers.CTRL = "control";
-validModifiers.CONTROL = "control";
-validModifiers.SHIFT = "shift";
-validModifiers.ALT = "alt";
-validModifiers.META = "meta";
-
-let bindingsKeys = null;
-(function()
-{
-  let request = new XMLHttpRequest();
-  request.open("GET", "chrome://global/content/platformHTMLBindings.xml");
-  request.addEventListener("load", () =>
-  {
-    bindingsKeys = request.responseXML.getElementsByTagName("handler");
-  });
-  request.send();
-})();
-
-
-/**
- * Sets the correct value of validModifiers.ACCEL.
- */
-function initAccelKey()
-{
-  validModifiers.ACCEL = "control";
-  try
-  {
-    let accelKey = Services.prefs.getIntPref("ui.key.accelKey");
-    if (accelKey == Ci.nsIDOMKeyEvent.DOM_VK_CONTROL)
-      validModifiers.ACCEL = "control";
-    else if (accelKey == Ci.nsIDOMKeyEvent.DOM_VK_ALT)
-      validModifiers.ACCEL = "alt";
-    else if (accelKey == Ci.nsIDOMKeyEvent.DOM_VK_META)
-      validModifiers.ACCEL = "meta";
-  }
-  catch(e)
-  {
-    Cu.reportError(e);
-  }
-}
-
-exports.KeySelector = KeySelector;
-
-/**
- * This class provides capabilities to find and use available keyboard shortcut
- * keys.
- * @param {ChromeWindow} window   the window where to look up existing shortcut
- *                                keys
- * @constructor
- */
-function KeySelector(window)
-{
-  this._initExistingShortcuts(window);
-}
-KeySelector.prototype =
-{
-  /**
-   * Map listing existing shortcut keys as its keys.
-   * @type Object
-   */
-  _existingShortcuts: null,
-
-  /**
-   * Sets up _existingShortcuts property for a window.
-   */
-  _initExistingShortcuts: function(/**ChromeWindow*/ window)
-  {
-    if (!validModifiers.ACCEL)
-      initAccelKey();
-
-    this._existingShortcuts = Object.create(null);
-
-    let keys = Array.prototype.slice.apply(window.document.getElementsByTagName("key"));
-    if (bindingsKeys)
-      keys.push.apply(keys, bindingsKeys);
-    for (let i = 0; i < keys.length; i++)
-    {
-      let key = keys[i];
-      let keyData =
-      {
-        shift: false,
-        meta: false,
-        alt: false,
-        control: false,
-        char: null,
-        code: null
-      };
-
-      let keyChar = key.getAttribute("key");
-      if (keyChar && keyChar.length == 1)
-        keyData.char = keyChar.toUpperCase();
-
-      let keyCode = key.getAttribute("keycode");
-      if (keyCode && "DOM_" + keyCode.toUpperCase() in Ci.nsIDOMKeyEvent)
-        keyData.code = Ci.nsIDOMKeyEvent["DOM_" + keyCode.toUpperCase()];
-
-      if (!keyData.char && !keyData.code)
-        continue;
-
-      let keyModifiers = key.getAttribute("modifiers");
-      if (keyModifiers)
-        for (let modifier of keyModifiers.toUpperCase().match(/\w+/g))
-          if (modifier in validModifiers)
-            keyData[validModifiers[modifier]] = true;
-
-      let canonical = [keyData.shift, keyData.meta, keyData.alt, keyData.control, keyData.char || keyData.code].join(" ");
-      this._existingShortcuts[canonical] = true;
-    }
-  },
-
-  /**
-   * Selects a keyboard shortcut variant that isn't already taken,
-   * parses it into an object.
-   */
-  selectKey: function(/**String*/ variants) /**Object*/
-  {
-    for (let variant of variants.split(/\s*,\s*/))
-    {
-      if (!variant)
-        continue;
-
-      let keyData =
-      {
-        shift: false,
-        meta: false,
-        alt: false,
-        control: false,
-        char: null,
-        code: null,
-        codeName: null
-      };
-      for (let part of variant.toUpperCase().split(/\s+/))
-      {
-        if (part in validModifiers)
-          keyData[validModifiers[part]] = true;
-        else if (part.length == 1)
-          keyData.char = part;
-        else if ("DOM_VK_" + part in Ci.nsIDOMKeyEvent)
-        {
-          keyData.code = Ci.nsIDOMKeyEvent["DOM_VK_" + part];
-          keyData.codeName = "VK_" + part;
-        }
-      }
-
-      if (!keyData.char && !keyData.code)
-        continue;
-
-      let canonical = [keyData.shift, keyData.meta, keyData.alt, keyData.control, keyData.char || keyData.code].join(" ");
-      if (canonical in this._existingShortcuts)
-        continue;
-
-      return keyData;
-    }
-
-    return null;
-  }
-};
-
-/**
- * Creates the text representation for a key.
- * @static
- */
-KeySelector.getTextForKey = function (/**Object*/ key) /**String*/
-{
-  if (!key)
-    return null;
-
-  if (!("text" in key))
-  {
-    key.text = null;
-    try
-    {
-      let stringBundle = Services.strings.createBundle("chrome://global-platform/locale/platformKeys.properties");
-      let parts = [];
-      if (key.control)
-        parts.push(stringBundle.GetStringFromName("VK_CONTROL"));
-      if (key.alt)
-        parts.push(stringBundle.GetStringFromName("VK_ALT"));
-      if (key.meta)
-        parts.push(stringBundle.GetStringFromName("VK_META"));
-      if (key.shift)
-        parts.push(stringBundle.GetStringFromName("VK_SHIFT"));
-      if (key.char)
-        parts.push(key.char.toUpperCase());
-      else
-      {
-        let stringBundle2 = Services.strings.createBundle("chrome://global/locale/keys.properties");
-        parts.push(stringBundle2.GetStringFromName(key.codeName));
-      }
-      key.text = parts.join(stringBundle.GetStringFromName("MODIFIER_SEPARATOR"));
-    }
-    catch (e)
-    {
-      Cu.reportError(e);
-      return null;
-    }
-  }
-  return key.text;
-};
-
-/**
- * Tests whether a keypress event matches the given key.
- * @static
- */
-KeySelector.matchesKey = function(/**Event*/ event, /**Object*/ key) /**Boolean*/
-{
-  if (event.defaultPrevented || !key)
-    return false;
-  if (key.shift != event.shiftKey || key.alt != event.altKey)
-    return false;
-  if (key.meta != event.metaKey || key.control != event.ctrlKey)
-    return false;
-
-  if (key.char && event.charCode && String.fromCharCode(event.charCode).toUpperCase() == key.char)
-    return true;
-  if (key.code && event.keyCode && event.keyCode == key.code)
-    return true;
-  return false;
-};