+/**
+ * Originally based of this code... - refactored for Roo...
+ *
+ * History.js Core
+ * @author Benjamin Arthur Lupton <contact@balupton.com>
+ * @copyright 2010-2011 Benjamin Arthur Lupton <contact@balupton.com>
+ * @license New BSD License <http://creativecommons.org/licenses/BSD/>
+ */
+
+(function(window,undefined){
+ "use strict";
+
+ // ========================================================================
+ // Initialise
+
+ // Localise Globals
+ var
+ console = window.console||undefined, // Prevent a JSLint complain
+ document = window.document, // Make sure we are using the correct document
+ navigator = window.navigator, // Make sure we are using the correct navigator
+ sessionStorage = false, // sessionStorage
+ setTimeout = window.setTimeout,
+ clearTimeout = window.clearTimeout,
+ setInterval = window.setInterval,
+ clearInterval = window.clearInterval,
+ JSON = window.JSON,
+ alert = window.alert,
+ History = window.History = window.History||{}, // Public History Object
+ history = window.history; // Old History Object
+
+ try {
+ sessionStorage = window.sessionStorage; // This will throw an exception in some browsers when cookies/localStorage are explicitly disabled (i.e. Chrome)
+ sessionStorage.setItem('TEST', '1');
+ sessionStorage.removeItem('TEST');
+ } catch(e) {
+ sessionStorage = false;
+ }
+
+ // MooTools Compatibility
+ JSON.stringify = JSON.stringify||JSON.encode;
+ JSON.parse = JSON.parse||JSON.decode;
+
+ // Check Existence
+ if ( typeof History.init !== 'undefined' ) {
+ throw new Error('History.js Core has already been loaded...');
+ }
+
+ // Initialise History
+ History.init = function(options){
+ // Check Load Status of Adapter
+ if ( typeof History.Adapter === 'undefined' ) {
+ return false;
+ }
+
+ // Check Load Status of Core
+ if ( typeof History.initCore !== 'undefined' ) {
+ History.initCore();
+ }
+
+ // Check Load Status of HTML4 Support
+ if ( typeof History.initHtml4 !== 'undefined' ) {
+ History.initHtml4();
+ }
+
+ // Return true
+ return true;
+ };
+
+
+ // ========================================================================
+ // Initialise Core
+
+ // Initialise Core
+ History.initCore = function(options){
+ // Initialise
+ if ( typeof History.initCore.initialized !== 'undefined' ) {
+ // Already Loaded
+ return false;
+ }
+ else {
+ History.initCore.initialized = true;
+ }
+
+
+ // ====================================================================
+ // Options
+
+ /**
+ * History.options
+ * Configurable options
+ */
+ History.options = History.options||{};
+
+ /**
+ * History.options.hashChangeInterval
+ * How long should the interval be before hashchange checks
+ */
+ History.options.hashChangeInterval = History.options.hashChangeInterval || 100;
+
+ /**
+ * History.options.safariPollInterval
+ * How long should the interval be before safari poll checks
+ */
+ History.options.safariPollInterval = History.options.safariPollInterval || 500;
+
+ /**
+ * History.options.doubleCheckInterval
+ * How long should the interval be before we perform a double check
+ */
+ History.options.doubleCheckInterval = History.options.doubleCheckInterval || 500;
+
+ /**
+ * History.options.disableSuid
+ * Force History not to append suid
+ */
+ History.options.disableSuid = History.options.disableSuid || false;
+
+ /**
+ * History.options.storeInterval
+ * How long should we wait between store calls
+ */
+ History.options.storeInterval = History.options.storeInterval || 1000;
+
+ /**
+ * History.options.busyDelay
+ * How long should we wait between busy events
+ */
+ History.options.busyDelay = History.options.busyDelay || 250;
+
+ /**
+ * History.options.debug
+ * If true will enable debug messages to be logged
+ */
+ History.options.debug = History.options.debug || false;
+
+ /**
+ * History.options.initialTitle
+ * What is the title of the initial state
+ */
+ History.options.initialTitle = History.options.initialTitle || document.title;
+
+ /**
+ * History.options.html4Mode
+ * If true, will force HTMl4 mode (hashtags)
+ */
+ History.options.html4Mode = History.options.html4Mode || false;
+
+ /**
+ * History.options.delayInit
+ * Want to override default options and call init manually.
+ */
+ History.options.delayInit = History.options.delayInit || false;
+
+
+ // ====================================================================
+ // Interval record
+
+ /**
+ * History.intervalList
+ * List of intervals set, to be cleared when document is unloaded.
+ */
+ History.intervalList = [];
+
+ /**
+ * History.clearAllIntervals
+ * Clears all setInterval instances.
+ */
+ History.clearAllIntervals = function(){
+ var i, il = History.intervalList;
+ if (typeof il !== "undefined" && il !== null) {
+ for (i = 0; i < il.length; i++) {
+ clearInterval(il[i]);
+ }
+ History.intervalList = null;
+ }
+ };
+
+
+ // ====================================================================
+ // Debug
+
+ /**
+ * History.debug(message,...)
+ * Logs the passed arguments if debug enabled
+ */
+ History.debug = function(){
+ if ( (History.options.debug||false) ) {
+ Roo.log.apply(History,arguments);
+ }
+ };
+
+
+
+ // ====================================================================
+ // Emulated Status
+
+ /**
+ * History.getInternetExplorerMajorVersion()
+ * Get's the major version of Internet Explorer
+ * @return {integer}
+ * @license Public Domain
+ * @author Benjamin Arthur Lupton <contact@balupton.com>
+ * @author James Padolsey <https://gist.github.com/527683>
+ */
+ History.getInternetExplorerMajorVersion = function(){
+ var result = History.getInternetExplorerMajorVersion.cached =
+ (typeof History.getInternetExplorerMajorVersion.cached !== 'undefined')
+ ? History.getInternetExplorerMajorVersion.cached
+ : (function(){
+ var v = 3,
+ div = document.createElement('div'),
+ all = div.getElementsByTagName('i');
+ while ( (div.innerHTML = '<!--[if gt IE ' + (++v) + ']><i></i><![endif]-->') && all[0] ) {}
+ return (v > 4) ? v : false;
+ })()
+ ;
+ return result;
+ };
+
+ /**
+ * History.isInternetExplorer()
+ * Are we using Internet Explorer?
+ * @return {boolean}
+ * @license Public Domain
+ * @author Benjamin Arthur Lupton <contact@balupton.com>
+ */
+ History.isInternetExplorer = function(){
+ var result =
+ History.isInternetExplorer.cached =
+ (typeof History.isInternetExplorer.cached !== 'undefined')
+ ? History.isInternetExplorer.cached
+ : Boolean(History.getInternetExplorerMajorVersion())
+ ;
+ return result;
+ };
+
+ /**
+ * History.emulated
+ * Which features require emulating?
+ */
+
+ if (History.options.html4Mode) {
+ History.emulated = {
+ pushState : true,
+ hashChange: true
+ };
+ }
+
+ else {
+
+ History.emulated = {
+ pushState: !Boolean(
+ window.history && window.history.pushState && window.history.replaceState
+ && !(
+ (/ Mobile\/([1-7][a-z]|(8([abcde]|f(1[0-8]))))/i).test(navigator.userAgent) /* disable for versions of iOS before version 4.3 (8F190) */
+ || (/AppleWebKit\/5([0-2]|3[0-2])/i).test(navigator.userAgent) /* disable for the mercury iOS browser, or at least older versions of the webkit engine */
+ )
+ ),
+ hashChange: Boolean(
+ !(('onhashchange' in window) || ('onhashchange' in document))
+ ||
+ (History.isInternetExplorer() && History.getInternetExplorerMajorVersion() < 8)
+ )
+ };
+ }
+
+ /**
+ * History.enabled
+ * Is History enabled?
+ */
+ History.enabled = !History.emulated.pushState;
+
+ /**
+ * History.bugs
+ * Which bugs are present
+ */
+ History.bugs = {
+ /**
+ * Safari 5 and Safari iOS 4 fail to return to the correct state once a hash is replaced by a `replaceState` call
+ * https://bugs.webkit.org/show_bug.cgi?id=56249
+ */
+ setHash: Boolean(!History.emulated.pushState && navigator.vendor === 'Apple Computer, Inc.' && /AppleWebKit\/5([0-2]|3[0-3])/.test(navigator.userAgent)),
+
+ /**
+ * Safari 5 and Safari iOS 4 sometimes fail to apply the state change under busy conditions
+ * https://bugs.webkit.org/show_bug.cgi?id=42940
+ */
+ safariPoll: Boolean(!History.emulated.pushState && navigator.vendor === 'Apple Computer, Inc.' && /AppleWebKit\/5([0-2]|3[0-3])/.test(navigator.userAgent)),
+
+ /**
+ * MSIE 6 and 7 sometimes do not apply a hash even it was told to (requiring a second call to the apply function)
+ */
+ ieDoubleCheck: Boolean(History.isInternetExplorer() && History.getInternetExplorerMajorVersion() < 8),
+
+ /**
+ * MSIE 6 requires the entire hash to be encoded for the hashes to trigger the onHashChange event
+ */
+ hashEscape: Boolean(History.isInternetExplorer() && History.getInternetExplorerMajorVersion() < 7)
+ };
+
+ /**
+ * History.isEmptyObject(obj)
+ * Checks to see if the Object is Empty
+ * @param {Object} obj
+ * @return {boolean}
+ */
+ History.isEmptyObject = function(obj) {
+ for ( var name in obj ) {
+ if ( obj.hasOwnProperty(name) ) {
+ return false;
+ }
+ }
+ return true;
+ };
+
+ /**
+ * History.cloneObject(obj)
+ * Clones a object and eliminate all references to the original contexts
+ * @param {Object} obj
+ * @return {Object}
+ */
+ History.cloneObject = function(obj) {
+ var hash,newObj;
+ if ( obj ) {
+ hash = JSON.stringify(obj);
+ newObj = JSON.parse(hash);
+ }
+ else {
+ newObj = {};
+ }
+ return newObj;
+ };
+
+
+ // ====================================================================
+ // URL Helpers
+
+ /**
+ * History.getRootUrl()
+ * Turns "http://mysite.com/dir/page.html?asd" into "http://mysite.com"
+ * @return {String} rootUrl
+ */
+ History.getRootUrl = function(){
+ // Create
+ var rootUrl = document.location.protocol+'//'+(document.location.hostname||document.location.host);
+ if ( document.location.port||false ) {
+ rootUrl += ':'+document.location.port;
+ }
+ rootUrl += '/';
+
+ // Return
+ return rootUrl;
+ };
+
+ /**
+ * History.getBaseHref()
+ * Fetches the `href` attribute of the `<base href="...">` element if it exists
+ * @return {String} baseHref
+ */
+ History.getBaseHref = function(){
+ // Create
+ var
+ baseElements = document.getElementsByTagName('base'),
+ baseElement = null,
+ baseHref = '';
+
+ // Test for Base Element
+ if ( baseElements.length === 1 ) {
+ // Prepare for Base Element
+ baseElement = baseElements[0];
+ baseHref = baseElement.href.replace(/[^\/]+$/,'');
+ }
+
+ // Adjust trailing slash
+ baseHref = baseHref.replace(/\/+$/,'');
+ if ( baseHref ) baseHref += '/';
+
+ // Return
+ return baseHref;
+ };
+
+ /**
+ * History.getBaseUrl()
+ * Fetches the baseHref or basePageUrl or rootUrl (whichever one exists first)
+ * @return {String} baseUrl
+ */
+ History.getBaseUrl = function(){
+ // Create
+ var baseUrl = History.getBaseHref()||History.getBasePageUrl()||History.getRootUrl();
+
+ // Return
+ return baseUrl;
+ };
+
+ /**
+ * History.getPageUrl()
+ * Fetches the URL of the current page
+ * @return {String} pageUrl
+ */
+ History.getPageUrl = function(){
+ // Fetch
+ var
+ State = History.getState(false,false),
+ stateUrl = (State||{}).url||History.getLocationHref(),
+ pageUrl;
+
+ // Create
+ pageUrl = stateUrl.replace(/\/+$/,'').replace(/[^\/]+$/,function(part,index,string){
+ return (/\./).test(part) ? part : part+'/';
+ });
+
+ // Return
+ return pageUrl;
+ };
+
+ /**
+ * History.getBasePageUrl()
+ * Fetches the Url of the directory of the current page
+ * @return {String} basePageUrl
+ */
+ History.getBasePageUrl = function(){
+ // Create
+ var basePageUrl = (History.getLocationHref()).replace(/[#\?].*/,'').replace(/[^\/]+$/,function(part,index,string){
+ return (/[^\/]$/).test(part) ? '' : part;
+ }).replace(/\/+$/,'')+'/';
+
+ // Return
+ return basePageUrl;
+ };
+
+ /**
+ * History.getFullUrl(url)
+ * Ensures that we have an absolute URL and not a relative URL
+ * @param {string} url
+ * @param {Boolean} allowBaseHref
+ * @return {string} fullUrl
+ */
+ History.getFullUrl = function(url,allowBaseHref){
+ // Prepare
+ var fullUrl = url, firstChar = url.substring(0,1);
+ allowBaseHref = (typeof allowBaseHref === 'undefined') ? true : allowBaseHref;
+
+ // Check
+ if ( /[a-z]+\:\/\//.test(url) ) {
+ // Full URL
+ }
+ else if ( firstChar === '/' ) {
+ // Root URL
+ fullUrl = History.getRootUrl()+url.replace(/^\/+/,'');
+ }
+ else if ( firstChar === '#' ) {
+ // Anchor URL
+ fullUrl = History.getPageUrl().replace(/#.*/,'')+url;
+ }
+ else if ( firstChar === '?' ) {
+ // Query URL
+ fullUrl = History.getPageUrl().replace(/[\?#].*/,'')+url;
+ }
+ else {
+ // Relative URL
+ if ( allowBaseHref ) {
+ fullUrl = History.getBaseUrl()+url.replace(/^(\.\/)+/,'');
+ } else {
+ fullUrl = History.getBasePageUrl()+url.replace(/^(\.\/)+/,'');
+ }
+ // We have an if condition above as we do not want hashes
+ // which are relative to the baseHref in our URLs
+ // as if the baseHref changes, then all our bookmarks
+ // would now point to different locations
+ // whereas the basePageUrl will always stay the same
+ }
+
+ // Return
+ return fullUrl.replace(/\#$/,'');
+ };
+
+ /**
+ * History.getShortUrl(url)
+ * Ensures that we have a relative URL and not a absolute URL
+ * @param {string} url
+ * @return {string} url
+ */
+ History.getShortUrl = function(url){
+ // Prepare
+ var shortUrl = url, baseUrl = History.getBaseUrl(), rootUrl = History.getRootUrl();
+
+ // Trim baseUrl
+ if ( History.emulated.pushState ) {
+ // We are in a if statement as when pushState is not emulated
+ // The actual url these short urls are relative to can change
+ // So within the same session, we the url may end up somewhere different
+ shortUrl = shortUrl.replace(baseUrl,'');
+ }
+
+ // Trim rootUrl
+ shortUrl = shortUrl.replace(rootUrl,'/');
+
+ // Ensure we can still detect it as a state
+ if ( History.isTraditionalAnchor(shortUrl) ) {
+ shortUrl = './'+shortUrl;
+ }
+
+ // Clean It
+ shortUrl = shortUrl.replace(/^(\.\/)+/g,'./').replace(/\#$/,'');
+
+ // Return
+ return shortUrl;
+ };
+
+ /**
+ * History.getLocationHref(document)
+ * Returns a normalized version of document.location.href
+ * accounting for browser inconsistencies, etc.
+ *
+ * This URL will be URI-encoded and will include the hash
+ *
+ * @param {object} document
+ * @return {string} url
+ */
+ History.getLocationHref = function(doc) {
+ doc = doc || document;
+
+ // most of the time, this will be true
+ if (doc.URL === doc.location.href)
+ return doc.location.href;
+
+ // some versions of webkit URI-decode document.location.href
+ // but they leave document.URL in an encoded state
+ if (doc.location.href === decodeURIComponent(doc.URL))
+ return doc.URL;
+
+ // FF 3.6 only updates document.URL when a page is reloaded
+ // document.location.href is updated correctly
+ if (doc.location.hash && decodeURIComponent(doc.location.href.replace(/^[^#]+/, "")) === doc.location.hash)
+ return doc.location.href;
+
+ if (doc.URL.indexOf('#') == -1 && doc.location.href.indexOf('#') != -1)
+ return doc.location.href;
+
+ return doc.URL || doc.location.href;
+ };
+
+
+ // ====================================================================
+ // State Storage
+
+ /**
+ * History.store
+ * The store for all session specific data
+ */
+ History.store = {};
+
+ /**
+ * History.idToState
+ * 1-1: State ID to State Object
+ */
+ History.idToState = History.idToState||{};
+
+ /**
+ * History.stateToId
+ * 1-1: State String to State ID
+ */
+ History.stateToId = History.stateToId||{};
+
+ /**
+ * History.urlToId
+ * 1-1: State URL to State ID
+ */
+ History.urlToId = History.urlToId||{};
+
+ /**
+ * History.storedStates
+ * Store the states in an array
+ */
+ History.storedStates = History.storedStates||[];
+
+ /**
+ * History.savedStates
+ * Saved the states in an array
+ */
+ History.savedStates = History.savedStates||[];
+
+ /**
+ * History.noramlizeStore()
+ * Noramlize the store by adding necessary values
+ */
+ History.normalizeStore = function(){
+ History.store.idToState = History.store.idToState||{};
+ History.store.urlToId = History.store.urlToId||{};
+ History.store.stateToId = History.store.stateToId||{};
+ };
+
+ /**
+ * History.getState()
+ * Get an object containing the data, title and url of the current state
+ * @param {Boolean} friendly
+ * @param {Boolean} create
+ * @return {Object} State
+ */
+ History.getState = function(friendly,create){
+ // Prepare
+ if ( typeof friendly === 'undefined' ) { friendly = true; }
+ if ( typeof create === 'undefined' ) { create = true; }
+
+ // Fetch
+ var State = History.getLastSavedState();
+
+ // Create
+ if ( !State && create ) {
+ State = History.createStateObject();
+ }
+
+ // Adjust
+ if ( friendly ) {
+ State = History.cloneObject(State);
+ State.url = State.cleanUrl||State.url;
+ }
+
+ // Return
+ return State;
+ };
+
+ /**
+ * History.getIdByState(State)
+ * Gets a ID for a State
+ * @param {State} newState
+ * @return {String} id
+ */
+ History.getIdByState = function(newState){
+
+ // Fetch ID
+ var id = History.extractId(newState.url),
+ str;
+
+ if ( !id ) {
+ // Find ID via State String
+ str = History.getStateString(newState);
+ if ( typeof History.stateToId[str] !== 'undefined' ) {
+ id = History.stateToId[str];
+ }
+ else if ( typeof History.store.stateToId[str] !== 'undefined' ) {
+ id = History.store.stateToId[str];
+ }
+ else {
+ // Generate a new ID
+ while ( true ) {
+ id = (new Date()).getTime() + String(Math.random()).replace(/\D/g,'');
+ if ( typeof History.idToState[id] === 'undefined' && typeof History.store.idToState[id] === 'undefined' ) {
+ break;
+ }
+ }
+
+ // Apply the new State to the ID
+ History.stateToId[str] = id;
+ History.idToState[id] = newState;
+ }
+ }
+
+ // Return ID
+ return id;
+ };
+
+ /**
+ * History.normalizeState(State)
+ * Expands a State Object
+ * @param {object} State
+ * @return {object}
+ */
+ History.normalizeState = function(oldState){
+ // Variables
+ var newState, dataNotEmpty;
+
+ // Prepare
+ if ( !oldState || (typeof oldState !== 'object') ) {
+ oldState = {};
+ }
+
+ // Check
+ if ( typeof oldState.normalized !== 'undefined' ) {
+ return oldState;
+ }
+
+ // Adjust
+ if ( !oldState.data || (typeof oldState.data !== 'object') ) {
+ oldState.data = {};
+ }
+
+ // ----------------------------------------------------------------
+
+ // Create
+ newState = {};
+ newState.normalized = true;
+ newState.title = oldState.title||'';
+ newState.url = History.getFullUrl(oldState.url?oldState.url:(History.getLocationHref()));
+ newState.hash = History.getShortUrl(newState.url);
+ newState.data = History.cloneObject(oldState.data);
+
+ // Fetch ID
+ newState.id = History.getIdByState(newState);
+
+ // ----------------------------------------------------------------
+
+ // Clean the URL
+ newState.cleanUrl = newState.url.replace(/\??\&_suid.*/,'');
+ newState.url = newState.cleanUrl;
+
+ // Check to see if we have more than just a url
+ dataNotEmpty = !History.isEmptyObject(newState.data);
+
+ // Apply
+ if ( (newState.title || dataNotEmpty) && History.options.disableSuid !== true ) {
+ // Add ID to Hash
+ newState.hash = History.getShortUrl(newState.url).replace(/\??\&_suid.*/,'');
+ if ( !/\?/.test(newState.hash) ) {
+ newState.hash += '?';
+ }
+ newState.hash += '&_suid='+newState.id;
+ }
+
+ // Create the Hashed URL
+ newState.hashedUrl = History.getFullUrl(newState.hash);
+
+ // ----------------------------------------------------------------
+
+ // Update the URL if we have a duplicate
+ if ( (History.emulated.pushState || History.bugs.safariPoll) && History.hasUrlDuplicate(newState) ) {
+ newState.url = newState.hashedUrl;
+ }
+
+ // ----------------------------------------------------------------
+
+ // Return
+ return newState;
+ };
+
+ /**
+ * History.createStateObject(data,title,url)
+ * Creates a object based on the data, title and url state params
+ * @param {object} data
+ * @param {string} title
+ * @param {string} url
+ * @return {object}
+ */
+ History.createStateObject = function(data,title,url){
+ // Hashify
+ var State = {
+ 'data': data,
+ 'title': title,
+ 'url': url
+ };
+
+ // Expand the State
+ State = History.normalizeState(State);
+
+ // Return object
+ return State;
+ };
+
+ /**
+ * History.getStateById(id)
+ * Get a state by it's UID
+ * @param {String} id
+ */
+ History.getStateById = function(id){
+ // Prepare
+ id = String(id);
+
+ // Retrieve
+ var State = History.idToState[id] || History.store.idToState[id] || undefined;
+
+ // Return State
+ return State;
+ };
+
+ /**
+ * Get a State's String
+ * @param {State} passedState
+ */
+ History.getStateString = function(passedState){
+ // Prepare
+ var State, cleanedState, str;
+
+ // Fetch
+ State = History.normalizeState(passedState);
+
+ // Clean
+ cleanedState = {
+ data: State.data,
+ title: passedState.title,
+ url: passedState.url
+ };
+
+ // Fetch
+ str = JSON.stringify(cleanedState);
+
+ // Return
+ return str;
+ };
+
+ /**
+ * Get a State's ID
+ * @param {State} passedState
+ * @return {String} id
+ */
+ History.getStateId = function(passedState){
+ // Prepare
+ var State, id;
+
+ // Fetch
+ State = History.normalizeState(passedState);
+
+ // Fetch
+ id = State.id;
+
+ // Return
+ return id;
+ };
+
+ /**
+ * History.getHashByState(State)
+ * Creates a Hash for the State Object
+ * @param {State} passedState
+ * @return {String} hash
+ */
+ History.getHashByState = function(passedState){
+ // Prepare
+ var State, hash;
+
+ // Fetch
+ State = History.normalizeState(passedState);
+
+ // Hash
+ hash = State.hash;
+
+ // Return
+ return hash;
+ };
+
+ /**
+ * History.extractId(url_or_hash)
+ * Get a State ID by it's URL or Hash
+ * @param {string} url_or_hash
+ * @return {string} id
+ */
+ History.extractId = function ( url_or_hash ) {
+ // Prepare
+ var id,parts,url, tmp;
+
+ // Extract
+
+ // If the URL has a #, use the id from before the #
+ if (url_or_hash.indexOf('#') != -1)
+ {
+ tmp = url_or_hash.split("#")[0];
+ }
+ else
+ {
+ tmp = url_or_hash;
+ }
+
+ parts = /(.*)\&_suid=([0-9]+)$/.exec(tmp);
+ url = parts ? (parts[1]||url_or_hash) : url_or_hash;
+ id = parts ? String(parts[2]||'') : '';
+
+ // Return
+ return id||false;
+ };
+
+ /**
+ * History.isTraditionalAnchor
+ * Checks to see if the url is a traditional anchor or not
+ * @param {String} url_or_hash
+ * @return {Boolean}
+ */
+ History.isTraditionalAnchor = function(url_or_hash){
+ // Check
+ var isTraditional = !(/[\/\?\.]/.test(url_or_hash));
+
+ // Return
+ return isTraditional;
+ };
+
+ /**
+ * History.extractState
+ * Get a State by it's URL or Hash
+ * @param {String} url_or_hash
+ * @return {State|null}
+ */
+ History.extractState = function(url_or_hash,create){
+ // Prepare
+ var State = null, id, url;
+ create = create||false;
+
+ // Fetch SUID
+ id = History.extractId(url_or_hash);
+ if ( id ) {
+ State = History.getStateById(id);
+ }
+
+ // Fetch SUID returned no State
+ if ( !State ) {
+ // Fetch URL
+ url = History.getFullUrl(url_or_hash);
+
+ // Check URL
+ id = History.getIdByUrl(url)||false;
+ if ( id ) {
+ State = History.getStateById(id);
+ }
+
+ // Create State
+ if ( !State && create && !History.isTraditionalAnchor(url_or_hash) ) {
+ State = History.createStateObject(null,null,url);
+ }
+ }
+
+ // Return
+ return State;
+ };
+
+ /**
+ * History.getIdByUrl()
+ * Get a State ID by a State URL
+ */
+ History.getIdByUrl = function(url){
+ // Fetch
+ var id = History.urlToId[url] || History.store.urlToId[url] || undefined;
+
+ // Return
+ return id;
+ };
+
+ /**
+ * History.getLastSavedState()
+ * Get an object containing the data, title and url of the current state
+ * @return {Object} State
+ */
+ History.getLastSavedState = function(){
+ return History.savedStates[History.savedStates.length-1]||undefined;
+ };
+
+ /**
+ * History.getLastStoredState()
+ * Get an object containing the data, title and url of the current state
+ * @return {Object} State
+ */
+ History.getLastStoredState = function(){
+ return History.storedStates[History.storedStates.length-1]||undefined;
+ };
+
+ /**
+ * History.hasUrlDuplicate
+ * Checks if a Url will have a url conflict
+ * @param {Object} newState
+ * @return {Boolean} hasDuplicate
+ */
+ History.hasUrlDuplicate = function(newState) {
+ // Prepare
+ var hasDuplicate = false,
+ oldState;
+
+ // Fetch
+ oldState = History.extractState(newState.url);
+
+ // Check
+ hasDuplicate = oldState && oldState.id !== newState.id;
+
+ // Return
+ return hasDuplicate;
+ };
+
+ /**
+ * History.storeState
+ * Store a State
+ * @param {Object} newState
+ * @return {Object} newState
+ */
+ History.storeState = function(newState){
+ // Store the State
+ History.urlToId[newState.url] = newState.id;
+
+ // Push the State
+ History.storedStates.push(History.cloneObject(newState));
+
+ // Return newState
+ return newState;
+ };
+
+ /**
+ * History.isLastSavedState(newState)
+ * Tests to see if the state is the last state
+ * @param {Object} newState
+ * @return {boolean} isLast
+ */
+ History.isLastSavedState = function(newState){
+ // Prepare
+ var isLast = false,
+ newId, oldState, oldId;
+
+ // Check
+ if ( History.savedStates.length ) {
+ newId = newState.id;
+ oldState = History.getLastSavedState();
+ oldId = oldState.id;
+
+ // Check
+ isLast = (newId === oldId);
+ }
+
+ // Return
+ return isLast;
+ };
+
+ /**
+ * History.saveState
+ * Push a State
+ * @param {Object} newState
+ * @return {boolean} changed
+ */
+ History.saveState = function(newState){
+ // Check Hash
+ if ( History.isLastSavedState(newState) ) {
+ return false;
+ }
+
+ // Push the State
+ History.savedStates.push(History.cloneObject(newState));
+
+ // Return true
+ return true;
+ };
+
+ /**
+ * History.getStateByIndex()
+ * Gets a state by the index
+ * @param {integer} index
+ * @return {Object}
+ */
+ History.getStateByIndex = function(index){
+ // Prepare
+ var State = null;
+
+ // Handle
+ if ( typeof index === 'undefined' ) {
+ // Get the last inserted
+ State = History.savedStates[History.savedStates.length-1];
+ }
+ else if ( index < 0 ) {
+ // Get from the end
+ State = History.savedStates[History.savedStates.length+index];
+ }
+ else {
+ // Get from the beginning
+ State = History.savedStates[index];
+ }
+
+ // Return State
+ return State;
+ };
+
+ /**
+ * History.getCurrentIndex()
+ * Gets the current index
+ * @return (integer)
+ */
+ History.getCurrentIndex = function(){
+ // Prepare
+ var index = null;
+
+ // No states saved
+ if(History.savedStates.length < 1) {
+ index = 0;
+ }
+ else {
+ index = History.savedStates.length-1;
+ }
+ return index;
+ };
+
+ // ====================================================================
+ // Hash Helpers
+
+ /**
+ * History.getHash()
+ * @param {Location=} location
+ * Gets the current document hash
+ * Note: unlike location.hash, this is guaranteed to return the escaped hash in all browsers
+ * @return {string}
+ */
+ History.getHash = function(doc){
+ var url = History.getLocationHref(doc),
+ hash;
+ hash = History.getHashByUrl(url);
+ return hash;
+ };
+
+ /**
+ * History.unescapeHash()
+ * normalize and Unescape a Hash
+ * @param {String} hash
+ * @return {string}
+ */
+ History.unescapeHash = function(hash){
+ // Prepare
+ var result = History.normalizeHash(hash);
+
+ // Unescape hash
+ result = decodeURIComponent(result);
+
+ // Return result
+ return result;
+ };
+
+ /**
+ * History.normalizeHash()
+ * normalize a hash across browsers
+ * @return {string}
+ */
+ History.normalizeHash = function(hash){
+ // Prepare
+ var result = hash.replace(/[^#]*#/,'').replace(/#.*/, '');
+
+ // Return result
+ return result;
+ };
+
+ /**
+ * History.setHash(hash)
+ * Sets the document hash
+ * @param {string} hash
+ * @return {History}
+ */
+ History.setHash = function(hash,queue){
+ // Prepare
+ var State, pageUrl;
+
+ // Handle Queueing
+ if ( queue !== false && History.busy() ) {
+ // Wait + Push to Queue
+ //History.debug('History.setHash: we must wait', arguments);
+ History.pushQueue({
+ scope: History,
+ callback: History.setHash,
+ args: arguments,
+ queue: queue
+ });
+ return false;
+ }
+
+ // Log
+ //History.debug('History.setHash: called',hash);
+
+ // Make Busy + Continue
+ History.busy(true);
+
+ // Check if hash is a state
+ State = History.extractState(hash,true);
+ if ( State && !History.emulated.pushState ) {
+ // Hash is a state so skip the setHash
+ //History.debug('History.setHash: Hash is a state so skipping the hash set with a direct pushState call',arguments);
+
+ // PushState
+ History.pushState(State.data,State.title,State.url,false);
+ }
+ else if ( History.getHash() !== hash ) {
+ // Hash is a proper hash, so apply it
+
+ // Handle browser bugs
+ if ( History.bugs.setHash ) {
+ // Fix Safari Bug https://bugs.webkit.org/show_bug.cgi?id=56249
+
+ // Fetch the base page
+ pageUrl = History.getPageUrl();
+
+ // Safari hash apply
+ History.pushState(null,null,pageUrl+'#'+hash,false);
+ }
+ else {
+ // Normal hash apply
+ document.location.hash = hash;
+ }
+ }
+
+ // Chain
+ return History;
+ };
+
+ /**
+ * History.escape()
+ * normalize and Escape a Hash
+ * @return {string}
+ */
+ History.escapeHash = function(hash){
+ // Prepare
+ var result = History.normalizeHash(hash);
+
+ // Escape hash
+ result = window.encodeURIComponent(result);
+
+ // IE6 Escape Bug
+ if ( !History.bugs.hashEscape ) {
+ // Restore common parts
+ result = result
+ .replace(/\%21/g,'!')
+ .replace(/\%26/g,'&')
+ .replace(/\%3D/g,'=')
+ .replace(/\%3F/g,'?');
+ }
+
+ // Return result
+ return result;
+ };
+
+ /**
+ * History.getHashByUrl(url)
+ * Extracts the Hash from a URL
+ * @param {string} url
+ * @return {string} url
+ */
+ History.getHashByUrl = function(url){
+ // Extract the hash
+ var hash = String(url)
+ .replace(/([^#]*)#?([^#]*)#?(.*)/, '$2')
+ ;
+
+ // Unescape hash
+ hash = History.unescapeHash(hash);
+
+ // Return hash
+ return hash;
+ };
+
+ /**
+ * History.setTitle(title)
+ * Applies the title to the document
+ * @param {State} newState
+ * @return {Boolean}
+ */
+ History.setTitle = function(newState){
+ // Prepare
+ var title = newState.title,
+ firstState;
+
+ // Initial
+ if ( !title ) {
+ firstState = History.getStateByIndex(0);
+ if ( firstState && firstState.url === newState.url ) {
+ title = firstState.title||History.options.initialTitle;
+ }
+ }
+
+ // Apply
+ try {
+ document.getElementsByTagName('title')[0].innerHTML = title.replace('<','<').replace('>','>').replace(' & ',' & ');
+ }
+ catch ( Exception ) { }
+ document.title = title;
+
+ // Chain
+ return History;
+ };
+
+
+ // ====================================================================
+ // Queueing
+
+ /**
+ * History.queues
+ * The list of queues to use
+ * First In, First Out
+ */
+ History.queues = [];
+
+ /**
+ * History.busy(value)
+ * @param {boolean} value [optional]
+ * @return {boolean} busy
+ */
+ History.busy = function(value){
+ // Apply
+ if ( typeof value !== 'undefined' ) {
+ //History.debug('History.busy: changing ['+(History.busy.flag||false)+'] to ['+(value||false)+']', History.queues.length);
+ History.busy.flag = value;
+ }
+ // Default
+ else if ( typeof History.busy.flag === 'undefined' ) {
+ History.busy.flag = false;
+ }
+
+ // Queue
+ if ( !History.busy.flag ) {
+ // Execute the next item in the queue
+ clearTimeout(History.busy.timeout);
+ var fireNext = function(){
+ var i, queue, item;
+ if ( History.busy.flag ) return;
+ for ( i=History.queues.length-1; i >= 0; --i ) {
+ queue = History.queues[i];
+ if ( queue.length === 0 ) continue;
+ item = queue.shift();
+ History.fireQueueItem(item);
+ History.busy.timeout = setTimeout(fireNext,History.options.busyDelay);
+ }
+ };
+ History.busy.timeout = setTimeout(fireNext,History.options.busyDelay);
+ }
+
+ // Return
+ return History.busy.flag;
+ };
+
+ /**
+ * History.busy.flag
+ */
+ History.busy.flag = false;
+
+ /**
+ * History.fireQueueItem(item)
+ * Fire a Queue Item
+ * @param {Object} item
+ * @return {Mixed} result
+ */
+ History.fireQueueItem = function(item){
+ return item.callback.apply(item.scope||History,item.args||[]);
+ };
+
+ /**
+ * History.pushQueue(callback,args)
+ * Add an item to the queue
+ * @param {Object} item [scope,callback,args,queue]
+ */
+ History.pushQueue = function(item){
+ // Prepare the queue
+ History.queues[item.queue||0] = History.queues[item.queue||0]||[];
+
+ // Add to the queue
+ History.queues[item.queue||0].push(item);
+
+ // Chain
+ return History;
+ };
+
+ /**
+ * History.queue (item,queue), (func,queue), (func), (item)
+ * Either firs the item now if not busy, or adds it to the queue
+ */
+ History.queue = function(item,queue){
+ // Prepare
+ if ( typeof item === 'function' ) {
+ item = {
+ callback: item
+ };
+ }
+ if ( typeof queue !== 'undefined' ) {
+ item.queue = queue;
+ }
+
+ // Handle
+ if ( History.busy() ) {
+ History.pushQueue(item);
+ } else {
+ History.fireQueueItem(item);
+ }
+
+ // Chain
+ return History;
+ };
+
+ /**
+ * History.clearQueue()
+ * Clears the Queue
+ */
+ History.clearQueue = function(){
+ History.busy.flag = false;
+ History.queues = [];
+ return History;
+ };
+
+
+ // ====================================================================
+ // IE Bug Fix
+
+ /**
+ * History.stateChanged
+ * States whether or not the state has changed since the last double check was initialised
+ */
+ History.stateChanged = false;
+
+ /**
+ * History.doubleChecker
+ * Contains the timeout used for the double checks
+ */
+ History.doubleChecker = false;
+
+ /**
+ * History.doubleCheckComplete()
+ * Complete a double check
+ * @return {History}
+ */
+ History.doubleCheckComplete = function(){
+ // Update
+ History.stateChanged = true;
+
+ // Clear
+ History.doubleCheckClear();
+
+ // Chain
+ return History;
+ };
+
+ /**
+ * History.doubleCheckClear()
+ * Clear a double check
+ * @return {History}
+ */
+ History.doubleCheckClear = function(){
+ // Clear
+ if ( History.doubleChecker ) {
+ clearTimeout(History.doubleChecker);
+ History.doubleChecker = false;
+ }
+
+ // Chain
+ return History;
+ };
+
+ /**
+ * History.doubleCheck()
+ * Create a double check
+ * @return {History}
+ */
+ History.doubleCheck = function(tryAgain){
+ // Reset
+ History.stateChanged = false;
+ History.doubleCheckClear();
+
+ // Fix IE6,IE7 bug where calling history.back or history.forward does not actually change the hash (whereas doing it manually does)
+ // Fix Safari 5 bug where sometimes the state does not change: https://bugs.webkit.org/show_bug.cgi?id=42940
+ if ( History.bugs.ieDoubleCheck ) {
+ // Apply Check
+ History.doubleChecker = setTimeout(
+ function(){
+ History.doubleCheckClear();
+ if ( !History.stateChanged ) {
+ //History.debug('History.doubleCheck: State has not yet changed, trying again', arguments);
+ // Re-Attempt
+ tryAgain();
+ }
+ return true;
+ },
+ History.options.doubleCheckInterval
+ );
+ }
+
+ // Chain
+ return History;
+ };
+
+
+ // ====================================================================
+ // Safari Bug Fix
+
+ /**
+ * History.safariStatePoll()
+ * Poll the current state
+ * @return {History}
+ */
+ History.safariStatePoll = function(){
+ // Poll the URL
+
+ // Get the Last State which has the new URL
+ var
+ urlState = History.extractState(History.getLocationHref()),
+ newState;
+
+ // Check for a difference
+ if ( !History.isLastSavedState(urlState) ) {
+ newState = urlState;
+ }
+ else {
+ return;
+ }
+
+ // Check if we have a state with that url
+ // If not create it
+ if ( !newState ) {
+ //History.debug('History.safariStatePoll: new');
+ newState = History.createStateObject();
+ }
+
+ // Apply the New State
+ //History.debug('History.safariStatePoll: trigger');
+ History.Adapter.trigger(window,'popstate');
+
+ // Chain
+ return History;
+ };
+
+
+ // ====================================================================
+ // State Aliases
+
+ /**
+ * History.back(queue)
+ * Send the browser history back one item
+ * @param {Integer} queue [optional]
+ */
+ History.back = function(queue){
+ //History.debug('History.back: called', arguments);
+
+ // Handle Queueing
+ if ( queue !== false && History.busy() ) {
+ // Wait + Push to Queue
+ //History.debug('History.back: we must wait', arguments);
+ History.pushQueue({
+ scope: History,
+ callback: History.back,
+ args: arguments,
+ queue: queue
+ });
+ return false;
+ }
+
+ // Make Busy + Continue
+ History.busy(true);
+
+ // Fix certain browser bugs that prevent the state from changing
+ History.doubleCheck(function(){
+ History.back(false);
+ });
+
+ // Go back
+ history.go(-1);
+
+ // End back closure
+ return true;
+ };
+
+ /**
+ * History.forward(queue)
+ * Send the browser history forward one item
+ * @param {Integer} queue [optional]
+ */
+ History.forward = function(queue){
+ //History.debug('History.forward: called', arguments);
+
+ // Handle Queueing
+ if ( queue !== false && History.busy() ) {
+ // Wait + Push to Queue
+ //History.debug('History.forward: we must wait', arguments);
+ History.pushQueue({
+ scope: History,
+ callback: History.forward,
+ args: arguments,
+ queue: queue
+ });
+ return false;
+ }
+
+ // Make Busy + Continue
+ History.busy(true);
+
+ // Fix certain browser bugs that prevent the state from changing
+ History.doubleCheck(function(){
+ History.forward(false);
+ });
+
+ // Go forward
+ history.go(1);
+
+ // End forward closure
+ return true;
+ };
+
+ /**
+ * History.go(index,queue)
+ * Send the browser history back or forward index times
+ * @param {Integer} queue [optional]
+ */
+ History.go = function(index,queue){
+ //History.debug('History.go: called', arguments);
+
+ // Prepare
+ var i;
+
+ // Handle
+ if ( index > 0 ) {
+ // Forward
+ for ( i=1; i<=index; ++i ) {
+ History.forward(queue);
+ }
+ }
+ else if ( index < 0 ) {
+ // Backward
+ for ( i=-1; i>=index; --i ) {
+ History.back(queue);
+ }
+ }
+ else {
+ throw new Error('History.go: History.go requires a positive or negative integer passed.');
+ }
+
+ // Chain
+ return History;
+ };
+
+
+ // ====================================================================
+ // HTML5 State Support
+
+ // Non-Native pushState Implementation
+ if ( History.emulated.pushState ) {
+ /*
+ * Provide Skeleton for HTML4 Browsers
+ */
+
+ // Prepare
+ var emptyFunction = function(){};
+ History.pushState = History.pushState||emptyFunction;
+ History.replaceState = History.replaceState||emptyFunction;
+ } // History.emulated.pushState
+
+ // Native pushState Implementation
+ else {
+ /*
+ * Use native HTML5 History API Implementation
+ */
+
+ /**
+ * History.onPopState(event,extra)
+ * Refresh the Current State
+ */
+ History.onPopState = function(event,extra){
+ // Prepare
+ var stateId = false, newState = false, currentHash, currentState;
+
+ // Reset the double check
+ History.doubleCheckComplete();
+
+ // Check for a Hash, and handle apporiatly
+ currentHash = History.getHash();
+ if ( currentHash ) {
+ // Expand Hash
+ currentState = History.extractState(currentHash||History.getLocationHref(),true);
+ if ( currentState ) {
+ // We were able to parse it, it must be a State!
+ // Let's forward to replaceState
+ //History.debug('History.onPopState: state anchor', currentHash, currentState);
+ History.replaceState(currentState.data, currentState.title, currentState.url, false);
+ }
+ else {
+ // Traditional Anchor
+ //History.debug('History.onPopState: traditional anchor', currentHash);
+ History.Adapter.trigger(window,'anchorchange');
+ History.busy(false);
+ }
+
+ // We don't care for hashes
+ History.expectedStateId = false;
+ return false;
+ }
+
+ // Ensure
+ stateId = History.Adapter.extractEventData('state',event,extra) || false;
+
+ // Fetch State
+ if ( stateId ) {
+ // Vanilla: Back/forward button was used
+ newState = History.getStateById(stateId);
+ }
+ else if ( History.expectedStateId ) {
+ // Vanilla: A new state was pushed, and popstate was called manually
+ newState = History.getStateById(History.expectedStateId);
+ }
+ else {
+ // Initial State
+ newState = History.extractState(History.getLocationHref());
+ }
+
+ // The State did not exist in our store
+ if ( !newState ) {
+ // Regenerate the State
+ newState = History.createStateObject(null,null,History.getLocationHref());
+ }
+
+ // Clean
+ History.expectedStateId = false;
+
+ // Check if we are the same state
+ if ( History.isLastSavedState(newState) ) {
+ // There has been no change (just the page's hash has finally propagated)
+ //History.debug('History.onPopState: no change', newState, History.savedStates);
+ History.busy(false);
+ return false;
+ }
+
+ // Store the State
+ History.storeState(newState);
+ History.saveState(newState);
+
+ // Force update of the title
+ History.setTitle(newState);
+
+ // Fire Our Event
+ History.Adapter.trigger(window,'statechange');
+ History.busy(false);
+
+ // Return true
+ return true;
+ };
+ History.Adapter.bind(window,'popstate',History.onPopState);
+
+ /**
+ * History.pushState(data,title,url)
+ * Add a new State to the history object, become it, and trigger onpopstate
+ * We have to trigger for HTML4 compatibility
+ * @param {object} data
+ * @param {string} title
+ * @param {string} url
+ * @return {true}
+ */
+ History.pushState = function(data,title,url,queue){
+ //History.debug('History.pushState: called', arguments);
+
+ // Check the State
+ if ( History.getHashByUrl(url) && History.emulated.pushState ) {
+ throw new Error('History.js does not support states with fragement-identifiers (hashes/anchors).');
+ }
+
+ // Handle Queueing
+ if ( queue !== false && History.busy() ) {
+ // Wait + Push to Queue
+ //History.debug('History.pushState: we must wait', arguments);
+ History.pushQueue({
+ scope: History,
+ callback: History.pushState,
+ args: arguments,
+ queue: queue
+ });
+ return false;
+ }
+
+ // Make Busy + Continue
+ History.busy(true);
+
+ // Create the newState
+ var newState = History.createStateObject(data,title,url);
+
+ // Check it
+ if ( History.isLastSavedState(newState) ) {
+ // Won't be a change
+ History.busy(false);
+ }
+ else {
+ // Store the newState
+ History.storeState(newState);
+ History.expectedStateId = newState.id;
+
+ // Push the newState
+ history.pushState(newState.id,newState.title,newState.url);
+
+ // Fire HTML5 Event
+ History.Adapter.trigger(window,'popstate');
+ }
+
+ // End pushState closure
+ return true;
+ };
+
+ /**
+ * History.replaceState(data,title,url)
+ * Replace the State and trigger onpopstate
+ * We have to trigger for HTML4 compatibility
+ * @param {object} data
+ * @param {string} title
+ * @param {string} url
+ * @return {true}
+ */
+ History.replaceState = function(data,title,url,queue){
+ //History.debug('History.replaceState: called', arguments);
+
+ // Check the State
+ if ( History.getHashByUrl(url) && History.emulated.pushState ) {
+ throw new Error('History.js does not support states with fragement-identifiers (hashes/anchors).');
+ }
+
+ // Handle Queueing
+ if ( queue !== false && History.busy() ) {
+ // Wait + Push to Queue
+ //History.debug('History.replaceState: we must wait', arguments);
+ History.pushQueue({
+ scope: History,
+ callback: History.replaceState,
+ args: arguments,
+ queue: queue
+ });
+ return false;
+ }
+
+ // Make Busy + Continue
+ History.busy(true);
+
+ // Create the newState
+ var newState = History.createStateObject(data,title,url);
+
+ // Check it
+ if ( History.isLastSavedState(newState) ) {
+ // Won't be a change
+ History.busy(false);
+ }
+ else {
+ // Store the newState
+ History.storeState(newState);
+ History.expectedStateId = newState.id;
+
+ // Push the newState
+ history.replaceState(newState.id,newState.title,newState.url);
+
+ // Fire HTML5 Event
+ History.Adapter.trigger(window,'popstate');
+ }
+
+ // End replaceState closure
+ return true;
+ };
+
+ } // !History.emulated.pushState
+
+
+ // ====================================================================
+ // Initialise
+
+ /**
+ * Load the Store
+ */
+ if ( sessionStorage ) {
+ // Fetch
+ try {
+ History.store = JSON.parse(sessionStorage.getItem('History.store'))||{};
+ }
+ catch ( err ) {
+ History.store = {};
+ }
+
+ // Normalize
+ History.normalizeStore();
+ }
+ else {
+ // Default Load
+ History.store = {};
+ History.normalizeStore();
+ }
+
+ /**
+ * Clear Intervals on exit to prevent memory leaks
+ */
+ History.Adapter.bind(window,"unload",History.clearAllIntervals);
+
+ /**
+ * Create the initial State
+ */
+ History.saveState(History.storeState(History.extractState(History.getLocationHref(),true)));
+
+ /**
+ * Bind for Saving Store
+ */
+ if ( sessionStorage ) {
+ // When the page is closed
+ History.onUnload = function(){
+ // Prepare
+ var currentStore, item, currentStoreString;
+
+ // Fetch
+ try {
+ currentStore = JSON.parse(sessionStorage.getItem('History.store'))||{};
+ }
+ catch ( err ) {
+ currentStore = {};
+ }
+
+ // Ensure
+ currentStore.idToState = currentStore.idToState || {};
+ currentStore.urlToId = currentStore.urlToId || {};
+ currentStore.stateToId = currentStore.stateToId || {};
+
+ // Sync
+ for ( item in History.idToState ) {
+ if ( !History.idToState.hasOwnProperty(item) ) {
+ continue;
+ }
+ currentStore.idToState[item] = History.idToState[item];
+ }
+ for ( item in History.urlToId ) {
+ if ( !History.urlToId.hasOwnProperty(item) ) {
+ continue;
+ }
+ currentStore.urlToId[item] = History.urlToId[item];
+ }
+ for ( item in History.stateToId ) {
+ if ( !History.stateToId.hasOwnProperty(item) ) {
+ continue;
+ }
+ currentStore.stateToId[item] = History.stateToId[item];
+ }
+
+ // Update
+ History.store = currentStore;
+ History.normalizeStore();
+
+ // In Safari, going into Private Browsing mode causes the
+ // Session Storage object to still exist but if you try and use
+ // or set any property/function of it it throws the exception
+ // "QUOTA_EXCEEDED_ERR: DOM Exception 22: An attempt was made to
+ // add something to storage that exceeded the quota." infinitely
+ // every second.
+ currentStoreString = JSON.stringify(currentStore);
+ try {
+ // Store
+ sessionStorage.setItem('History.store', currentStoreString);
+ }
+ catch (e) {
+ if (e.code === DOMException.QUOTA_EXCEEDED_ERR) {
+ if (sessionStorage.length) {
+ // Workaround for a bug seen on iPads. Sometimes the quota exceeded error comes up and simply
+ // removing/resetting the storage can work.
+ sessionStorage.removeItem('History.store');
+ sessionStorage.setItem('History.store', currentStoreString);
+ } else {
+ // Otherwise, we're probably private browsing in Safari, so we'll ignore the exception.
+ }
+ } else {
+ throw e;
+ }
+ }
+ };
+
+ // For Internet Explorer
+ History.intervalList.push(setInterval(History.onUnload,History.options.storeInterval));
+
+ // For Other Browsers
+ History.Adapter.bind(window,'beforeunload',History.onUnload);
+ History.Adapter.bind(window,'unload',History.onUnload);
+
+ // Both are enabled for consistency
+ }
+
+ // Non-Native pushState Implementation
+ if ( !History.emulated.pushState ) {
+ // Be aware, the following is only for native pushState implementations
+ // If you are wanting to include something for all browsers
+ // Then include it above this if block
+
+ /**
+ * Setup Safari Fix
+ */
+ if ( History.bugs.safariPoll ) {
+ History.intervalList.push(setInterval(History.safariStatePoll, History.options.safariPollInterval));
+ }
+
+ /**
+ * Ensure Cross Browser Compatibility
+ */
+ if ( navigator.vendor === 'Apple Computer, Inc.' || (navigator.appCodeName||'') === 'Mozilla' ) {
+ /**
+ * Fix Safari HashChange Issue
+ */
+
+ // Setup Alias
+ History.Adapter.bind(window,'hashchange',function(){
+ History.Adapter.trigger(window,'popstate');
+ });
+
+ // Initialise Alias
+ if ( History.getHash() ) {
+ History.Adapter.onDomLoad(function(){
+ History.Adapter.trigger(window,'hashchange');
+ });
+ }
+ }
+
+ } // !History.emulated.pushState
+
+
+ }; // History.initCore
+
+ // Try to Initialise History
+ if (!History.options || !History.options.delayInit) {
+ History.init();
+ }
+
+})(window);
\ No newline at end of file
projects / roojs1 / commitdiff