Issue 5751 - Removing legacy gecko support

lib/windowObserver.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");
-Cu.import("resource://gre/modules/XPCOMUtils.jsm");
-
-exports.WindowObserver = WindowObserver;
-
-/**
- * This class will call listener's method applyToWindow() for all new chrome
- * windows being opened. It will also call listener's method removeFromWindow()
- * for all windows still open when the extension is shut down.
- * @param {Object} listener
- * @param {String} [when]   when to execute applyToWindow(). "start" means immediately
- *                          when the window opens, "ready" when its contents are available
- *                          and "end" (default) means to wait until the "load" event.
- * @constructor
- */
-function WindowObserver(listener, when)
-{
-  this._listener  = listener;
-  this._when = when;
-
-  let windows = [];
-  let e = Services.wm.getZOrderDOMWindowEnumerator(null, true);
-  while (e.hasMoreElements())
-    windows.push(e.getNext());
-
-  // Check if there are any windows that we missed
-  let eAll = Services.ww.getWindowEnumerator();
-  while (eAll.hasMoreElements())
-  {
-    let element = eAll.getNext();
-    if (windows.indexOf(element) < 0)
-      windows.push(element);
-  }
-
-  for (let i = 0; i < windows.length; i++)
-  {
-    let window = windows[i].QueryInterface(Ci.nsIDOMWindow);
-    if (when == "start" || window.document.readyState == "complete")
-      this._listener.applyToWindow(window);
-    else
-      this.observe(window, "chrome-document-global-created", null);
-  }
-
-  Services.obs.addObserver(this, "chrome-document-global-created", true);
-
-  this._shutdownHandler = function()
-  {
-    let e = Services.ww.getWindowEnumerator();
-    while (e.hasMoreElements())
-      this._listener.removeFromWindow(e.getNext().QueryInterface(Ci.nsIDOMWindow));
-
-    Services.obs.removeObserver(this, "chrome-document-global-created");
-  }.bind(this);
-  onShutdown.add(this._shutdownHandler);
-}
-WindowObserver.prototype =
-{
-  _listener: null,
-  _when: null,
-  _shutdownHandler: null,
-
-  shutdown: function()
-  {
-    if (!this._shutdownHandler)
-      return;
-
-    onShutdown.remove(this._shutdownHandler);
-    this._shutdownHandler();
-    this._shutdownHandler = null;
-  },
-
-  observe: function(subject, topic, data)
-  {
-    if (topic == "chrome-document-global-created")
-    {
-      let window = subject.QueryInterface(Ci.nsIDOMWindow);
-      if (this._when == "start")
-      {
-        this._listener.applyToWindow(window);
-        return;
-      }
-
-      let event = (this._when == "ready" ? "DOMContentLoaded" : "load");
-      let listener = function()
-      {
-        window.removeEventListener(event, listener, false);
-        if (this._shutdownHandler)
-          this._listener.applyToWindow(window);
-      }.bind(this);
-      window.addEventListener(event, listener, false);
-    }
-  },
-
-  QueryInterface: XPCOMUtils.generateQI([Ci.nsISupportsWeakReference, Ci.nsIObserver])
-};