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234 lines
7.6 KiB
JavaScript
234 lines
7.6 KiB
JavaScript
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is TabView Tabs.
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*
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* The Initial Developer of the Original Code is
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* Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2010
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Edward Lee <edilee@mozilla.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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const Cc = Components.classes;
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const Ci = Components.interfaces;
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const Cu = Components.utils;
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const Cr = Components.results;
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Cu.import("resource://gre/modules/Services.jsm");
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Cu.import("resource://gre/modules/XPCOMUtils.jsm");
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let EXPORTED_SYMBOLS = ["Tabs"];
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let Tabs = let (T = {
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//////////////////////////////////////////////////////////////////////////////
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//// Public
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//////////////////////////////////////////////////////////////////////////////
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/**
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* Get an array of all tabs from all tabbrowser windows.
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*
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* @usage let numTabs = Tabs.allTabs.length;
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* Tabs.allTabs.forEach(handleTabs);
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*/
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get allTabs() {
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// Get tabs from each browser and flatten them into one array
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return Array.concat.apply({}, T.allBrowsers.map(function(browser) {
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return Array.slice(browser.gBrowser.tabs);
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}));
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},
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/**
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* Attach a callback for when a tab's attributes change such as title, busy
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* state, icon, etc.
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*
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* There is also an unbind method off of this method to remove the callback.
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*
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* @param callback
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* Callback that gets called with the tab being changed as "this" and
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* the event as the first argument.
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* @usage Tabs.onChange(handleChange);
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* Tabs.onChange.unbind(handleChange);
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*/
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get onChange() T.makeBind("onChange"),
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/**
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* Attach a callback for when a tab is closed.
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*
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* There is also an unbind method off of this method to remove the callback.
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*
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* @param callback
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* Callback that gets called with the tab being closed as "this" and
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* the event as the first argument.
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* @usage Tabs.onClose(handleClose);
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* Tabs.onClose.unbind(handleClose);
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*/
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get onClose() T.makeBind("onClose"),
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/**
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* Attach a callback for when a tab is moved.
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*
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* There is also an unbind method off of this method to remove the callback.
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*
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* @param callback
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* Callback that gets called with the tab being moved as "this" and
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* the event as the first argument.
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* @usage Tabs.onMove(handleMove);
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* Tabs.onMove.unbind(handleMove);
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*/
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get onMove() T.makeBind("onMove"),
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/**
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* Attach a callback for when a tab is opened.
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*
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* There is also an unbind method off of this method to remove the callback.
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*
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* @param callback
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* Callback that gets called with the tab being opened as "this" and
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* the event as the first argument.
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* @usage Tabs.onOpen(handleOpen);
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* Tabs.onOpen.unbind(handleOpen);
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*/
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get onOpen() T.makeBind("onOpen"),
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/**
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* Attach a callback for when a tab is selected.
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*
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* There is also an unbind method off of this method to remove the callback.
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*
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* @param callback
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* Callback that gets called with the tab being selected as "this" and
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* the event as the first argument.
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* @usage Tabs.onSelect(handleSelect);
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* Tabs.onSelect.unbind(handleSelect);
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*/
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get onSelect() T.makeBind("onSelect"),
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//////////////////////////////////////////////////////////////////////////////
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//// Private
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//////////////////////////////////////////////////////////////////////////////
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init: function init() {
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// Only allow calling init once
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T.init = function() T;
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// Register listeners on all browsers and future browsers
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T.allBrowsers.forEach(T.registerBrowser);
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Services.obs.addObserver(T, "domwindowopened", false);
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return T;
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},
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get allBrowsers() {
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let browsers = [];
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let windows = Services.wm.getEnumerator("navigator:browser");
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while (windows.hasMoreElements())
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browsers.push(windows.getNext());
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return browsers;
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},
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eventMap: {
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TabAttrModified: "onChange",
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TabClose: "onClose",
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TabMove: "onMove",
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TabOpen: "onOpen",
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TabSelect: "onSelect",
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},
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registerBrowser: function registerBrowser(browser) {
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// Add a listener for each tab even to trigger the matching topic
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[i for (i in Iterator(T.eventMap))].forEach(function([tabEvent, topic]) {
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browser.addEventListener(tabEvent, function(event) {
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T.trigger(topic, event.originalTarget, event);
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}, true);
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});
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},
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listeners: {},
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makeBind: function makeBind(topic) {
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delete T[topic];
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T.listeners[topic] = [];
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// Allow adding listeners to this topic
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T[topic] = function bind(callback) {
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T.listeners[topic].push(callback);
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};
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// Allow removing listeners from this topic
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T[topic].unbind = function unbind(callback) {
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let index = T.listeners[topic].indexOf(callback);
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if (index != -1)
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T.listeners[topic].splice(index, 1);
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};
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return T[topic];
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},
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trigger: function trigger(topic, tab, event) {
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// Make sure we've gotten listeners before trying to call
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let listeners = T.listeners[topic];
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if (listeners == null)
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return;
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// Make a copy of the listeners, so it can't change as we call back
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listeners.slice().forEach(function(callback) {
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try {
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callback.call(tab, event);
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}
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// Ignore failures from the callback
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catch(ex) {}
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});
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},
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//////////////////////////////////////////////////////////////////////////////
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//// nsIObserver
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//////////////////////////////////////////////////////////////////////////////
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observe: function observe(subject, topic, data) {
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switch (topic) {
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case "domwindowopened":
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subject.addEventListener("load", function() {
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subject.removeEventListener("load", arguments.callee, false);
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// Now that the window has loaded, only register on browser windows
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let doc = subject.document.documentElement;
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if (doc.getAttribute("windowtype") == "navigator:browser")
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T.registerBrowser(subject);
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}, false);
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break;
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}
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},
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//////////////////////////////////////////////////////////////////////////////
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//// nsISupports
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//////////////////////////////////////////////////////////////////////////////
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QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver]),
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}) T.init();
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