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/* ***** 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 Twitter Address Bar Search.
*
* 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):
* Edward Lee <edilee@mozilla.com>
* Erik Vold <erikvvold@gmail.com>
*
* 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 ***** */
const {Cu} = require("chrome");
Cu.import("resource://gre/modules/Services.jsm", this);
var {unload} = require("unload+");
/**
* Apply a callback to each open and new browser windows.
*
* @usage watchWindows(callback): Apply a callback to each browser window.
* @param [function] callback: 1-parameter function that gets a browser window.
*/
exports.watchWindows = function watchWindows(callback) {
// Wrap the callback in a function that ignores failures
function watcher(window) {
try {
// Now that the window has loaded, only handle browser windows
let {documentElement} = window.document;
if (documentElement.getAttribute("windowtype") == "navigator:browser")
callback(window);
}
catch(ex) {}
}
// Wait for the window to finish loading before running the callback
function runOnLoad(window) {
// Listen for one load event before checking the window type
window.addEventListener("load", function runOnce() {
window.removeEventListener("load", runOnce, false);
watcher(window);
}, false);
}
// Add functionality to existing windows
let windows = Services.wm.getEnumerator(null);
while (windows.hasMoreElements()) {
// Only run the watcher immediately if the window is completely loaded
let window = windows.getNext();
if (window.document.readyState == "complete")
watcher(window);
// Wait for the window to load before continuing
else
runOnLoad(window);
}
// Watch for new browser windows opening then wait for it to load
function windowWatcher(subject, topic) {
if (topic == "domwindowopened")
runOnLoad(subject);
}
Services.ww.registerNotification(windowWatcher);
// Make sure to stop watching for windows if we're unloading
unload(function() Services.ww.unregisterNotification(windowWatcher));
};
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