3 Copyright 2012 Yahoo! Inc. All rights reserved.
4 Licensed under the BSD License.
5 http://yuilibrary.com/license/
7 YUI.add('history-html5', function(Y) {
10 * Provides browser history management using the HTML5 history API.
13 * @submodule history-html5
19 * Provides browser history management using the HTML5 history API.
23 * When calling the <code>add()</code>, <code>addValue()</code>,
24 * <code>replace()</code>, or <code>replaceValue()</code> methods on
25 * <code>HistoryHTML5</code>, the following additional options are supported:
29 * <dt><strong>title (String)</strong></dt>
31 * Title to use for the new history entry. Browsers will typically display
32 * this title to the user in the detailed history window or in a dropdown
33 * menu attached to the back/forward buttons. If not specified, the title
34 * of the current document will be used.
37 * <dt><strong>url (String)</strong></dt>
39 * URL to display to the user for the new history entry. This URL will be
40 * visible in the browser's address bar and will be the bookmarked URL if
41 * the user bookmarks the page. It may be a relative path ("foo/bar"), an
42 * absolute path ("/foo/bar"), or a full URL ("http://example.com/foo/bar").
43 * If you specify a full URL, the origin <i>must</i> be the same as the
44 * origin of the current page, or an error will occur. If no URL is
45 * specified, the current URL will not be changed.
50 * @extends HistoryBase
52 * @param {Object} config (optional) Configuration object.
55 var HistoryBase = Y.HistoryBase,
58 useHistoryHTML5 = Y.config.useHistoryHTML5,
60 SRC_POPSTATE = 'popstate',
61 SRC_REPLACE = HistoryBase.SRC_REPLACE;
63 function HistoryHTML5() {
64 HistoryHTML5.superclass.constructor.apply(this, arguments);
67 Y.extend(HistoryHTML5, HistoryBase, {
68 // -- Initialization -------------------------------------------------------
69 _init: function (config) {
70 var bookmarkedState = win.history.state;
72 config || (config = {});
74 // If both the initial state and the bookmarked state are objects, merge
75 // them (bookmarked state wins).
76 if (config.initialState
77 && Lang.type(config.initialState) === 'object'
78 && Lang.type(bookmarkedState) === 'object') {
80 this._initialState = Y.merge(config.initialState, bookmarkedState);
82 // Otherwise, the bookmarked state always wins if there is one. If
83 // there isn't a bookmarked state, history-base will take care of
84 // falling back to config.initialState or null.
85 this._initialState = bookmarkedState;
88 Y.on('popstate', this._onPopState, win, this);
90 HistoryHTML5.superclass._init.apply(this, arguments);
93 // -- Protected Methods ----------------------------------------------------
96 * Overrides HistoryBase's <code>_storeState()</code> and pushes or replaces
97 * a history entry using the HTML5 history API when necessary.
100 * @param {String} src Source of the changes.
101 * @param {Object} newState New state to store.
102 * @param {Object} options Zero or more options.
105 _storeState: function (src, newState, options) {
106 if (src !== SRC_POPSTATE) {
107 win.history[src === SRC_REPLACE ? 'replaceState' : 'pushState'](
109 options.title || Y.config.doc.title || '',
114 HistoryHTML5.superclass._storeState.apply(this, arguments);
117 // -- Protected Event Handlers ---------------------------------------------
120 * Handler for popstate events.
122 * @method _onPopState
126 _onPopState: function (e) {
127 this._resolveChanges(SRC_POPSTATE, e._event.state || null);
130 // -- Public Static Properties ---------------------------------------------
131 NAME: 'historyhtml5',
134 * Constant used to identify state changes originating from
135 * <code>popstate</code> events.
137 * @property SRC_POPSTATE
142 SRC_POPSTATE: SRC_POPSTATE
145 if (!Y.Node.DOM_EVENTS.popstate) {
146 Y.Node.DOM_EVENTS.popstate = 1;
149 Y.HistoryHTML5 = HistoryHTML5;
153 * If <code>true</code>, the <code>Y.History</code> alias will always point to
154 * <code>Y.HistoryHTML5</code> when the history-html5 module is loaded, even if
155 * the current browser doesn't support HTML5 history.
159 * If <code>false</code>, the <code>Y.History</code> alias will always point to
160 * <code>Y.HistoryHash</code> when the history-hash module is loaded, even if
161 * the current browser supports HTML5 history.
165 * If neither <code>true</code> nor <code>false</code>, the
166 * <code>Y.History</code> alias will point to the best available history adapter
167 * that the browser supports. This is the default behavior.
170 * @property useHistoryHTML5
176 // HistoryHTML5 will always win over HistoryHash unless useHistoryHTML5 is false
177 // or HTML5 history is not supported.
178 if (useHistoryHTML5 === true || (useHistoryHTML5 !== false &&
179 HistoryBase.html5)) {
180 Y.History = HistoryHTML5;
184 }, '3.5.1' ,{optional:['json'], requires:['event-base', 'history-base', 'node-base']});