1 files changed, 86 insertions, 0 deletions
diff --git a/tools/addon-sdk-1.4/packages/api-utils/lib/windows/observer.js b/tools/addon-sdk-1.4/packages/api-utils/lib/windows/observer.js
new file mode 100644
index 0000000..d7b01e6
--- /dev/null
+++ b/tools/addon-sdk-1.4/packages/api-utils/lib/windows/observer.js
@@ -0,0 +1,86 @@
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Jetpack.
+ *
+ * The Initial Developer of the Original Code is
+ * the Mozilla Foundation.
+ * Portions created by the Initial Developer are Copyright (C) 2011
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Irakli Gozalishvili <gozala@mozilla.com> (Original author)
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+"use strict";
+
+const { EventEmitterTrait: EventEmitter } = require("../events");
+const { WindowTracker, windowIterator } = require("../window-utils");
+const { DOMEventAssembler } = require("../events/assembler");
+const { Trait } = require("../light-traits");
+
+// Event emitter objects used to register listeners and emit events on them
+// when they occur.
+const observer = Trait.compose(DOMEventAssembler, EventEmitter).create({
+  /**
+   * Method is implemented by `EventEmitter` and is used just for emitting
+   * events on registered listeners.
+   */
+  _emit: Trait.required,
+  /**
+   * Events that are supported and emitted by the module.
+   */
+  supportedEventsTypes: [ "activate", "deactivate" ],
+  /**
+   * Function handles all the supported events on all the windows that are
+   * observed. Method is used to proxy events to the listeners registered on
+   * this event emitter.
+   * @param {Event} event
+   *    Keyboard event being emitted.
+   */
+  handleEvent: function handleEvent(event) {
+    this._emit(event.type, event.target, event);
+  }
+});
+
+// Using `WindowTracker` to track window events.
+new WindowTracker({
+  onTrack: function onTrack(chromeWindow) {
+    observer._emit("open", chromeWindow);
+    observer.observe(chromeWindow);
+  },
+  onUntrack: function onUntrack(chromeWindow) {
+    observer._emit("close", chromeWindow);
+    observer.ignore(chromeWindow);
+  }
+});
+
+// Making observer aware of already opened windows.
+for each (let window in windowIterator())
+  observer.observe(window);
+
+exports.observer = observer;