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- <pre class="prettyprint lang-js">/*!
- * Ext JS Library 3.0.3
- * Copyright(c) 2006-2009 Ext JS, LLC
- * licensing@extjs.com
- * http://www.extjs.com/license
+<body onload="prettyPrint(); highlight();">
+ <pre class="prettyprint lang-js"><span id='Ext-util-History'>/**
+</span> * @class Ext.util.History
+ *
+ * History management component that allows you to register arbitrary tokens that signify application
+ * history state on navigation actions. You can then handle the history {@link #change} event in order
+ * to reset your application UI to the appropriate state when the user navigates forward or backward through
+ * the browser history stack.
+ *
+ * ## Initializing
+ * The {@link #init} method of the History object must be called before using History. This sets up the internal
+ * state and must be the first thing called before using History.
+ *
+ * ## Setup
+ * The History objects requires elements on the page to keep track of the browser history. For older versions of IE,
+ * an IFrame is required to do the tracking. For other browsers, a hidden field can be used. The history objects expects
+ * these to be on the page before the {@link #init} method is called. The following markup is suggested in order
+ * to support all browsers:
+ *
+ * <form id="history-form" class="x-hide-display">
+ * <input type="hidden" id="x-history-field" />
+ * <iframe id="x-history-frame"></iframe>
+ * </form>
+ *
+ * @singleton
*/
-<div id="cls-Ext.History"></div>/**\r
- * @class Ext.History\r
- * @extends Ext.util.Observable\r
- * History management component that allows you to register arbitrary tokens that signify application\r
- * history state on navigation actions. You can then handle the history {@link #change} event in order\r
- * to reset your application UI to the appropriate state when the user navigates forward or backward through\r
- * the browser history stack.\r
- * @singleton\r
- */\r
-Ext.History = (function () {\r
- var iframe, hiddenField;\r
- var ready = false;\r
- var currentToken;\r
-\r
- function getHash() {\r
- var href = top.location.href, i = href.indexOf("#");\r
- return i >= 0 ? href.substr(i + 1) : null;\r
- }\r
-\r
- function doSave() {\r
- hiddenField.value = currentToken;\r
- }\r
-\r
- function handleStateChange(token) {\r
- currentToken = token;\r
- Ext.History.fireEvent('change', token);\r
- }\r
-\r
- function updateIFrame (token) {\r
- var html = ['<html><body><div id="state">',token,'</div></body></html>'].join('');\r
- try {\r
- var doc = iframe.contentWindow.document;\r
- doc.open();\r
- doc.write(html);\r
- doc.close();\r
- return true;\r
- } catch (e) {\r
- return false;\r
- }\r
- }\r
-\r
- function checkIFrame() {\r
- if (!iframe.contentWindow || !iframe.contentWindow.document) {\r
- setTimeout(checkIFrame, 10);\r
- return;\r
- }\r
-\r
- var doc = iframe.contentWindow.document;\r
- var elem = doc.getElementById("state");\r
- var token = elem ? elem.innerText : null;\r
-\r
- var hash = getHash();\r
-\r
- setInterval(function () {\r
-\r
- doc = iframe.contentWindow.document;\r
- elem = doc.getElementById("state");\r
-\r
- var newtoken = elem ? elem.innerText : null;\r
-\r
- var newHash = getHash();\r
-\r
- if (newtoken !== token) {\r
- token = newtoken;\r
- handleStateChange(token);\r
- top.location.hash = token;\r
- hash = token;\r
- doSave();\r
- } else if (newHash !== hash) {\r
- hash = newHash;\r
- updateIFrame(newHash);\r
- }\r
-\r
- }, 50);\r
-\r
- ready = true;\r
-\r
- Ext.History.fireEvent('ready', Ext.History);\r
- }\r
-\r
- function startUp() {\r
- currentToken = hiddenField.value ? hiddenField.value : getHash();\r
-\r
- if (Ext.isIE) {\r
- checkIFrame();\r
- } else {\r
- var hash = getHash();\r
- setInterval(function () {\r
- var newHash = getHash();\r
- if (newHash !== hash) {\r
- hash = newHash;\r
- handleStateChange(hash);\r
- doSave();\r
- }\r
- }, 50);\r
- ready = true;\r
- Ext.History.fireEvent('ready', Ext.History);\r
- }\r
- }\r
-\r
- return {\r
- <div id="prop-Ext.History-fieldId"></div>/**\r
- * The id of the hidden field required for storing the current history token.\r
- * @type String\r
- * @property\r
- */\r
- fieldId: 'x-history-field',\r
- <div id="prop-Ext.History-iframeId"></div>/**\r
- * The id of the iframe required by IE to manage the history stack.\r
- * @type String\r
- * @property\r
- */\r
- iframeId: 'x-history-frame',\r
- \r
- events:{},\r
-\r
- <div id="method-Ext.History-init"></div>/**\r
- * Initialize the global History instance.\r
- * @param {Boolean} onReady (optional) A callback function that will be called once the history\r
- * component is fully initialized.\r
- * @param {Object} scope (optional) The callback scope\r
- */\r
- init: function (onReady, scope) {\r
- if(ready) {\r
- Ext.callback(onReady, scope, [this]);\r
- return;\r
- }\r
- if(!Ext.isReady){\r
- Ext.onReady(function(){\r
- Ext.History.init(onReady, scope);\r
- });\r
- return;\r
- }\r
- hiddenField = Ext.getDom(Ext.History.fieldId);\r
- if (Ext.isIE) {\r
- iframe = Ext.getDom(Ext.History.iframeId);\r
- }\r
- this.addEvents('ready', 'change');\r
- if(onReady){\r
- this.on('ready', onReady, scope, {single:true});\r
- }\r
- startUp();\r
- },\r
-\r
- <div id="method-Ext.History-add"></div>/**\r
- * Add a new token to the history stack. This can be any arbitrary value, although it would\r
- * commonly be the concatenation of a component id and another id marking the specifc history\r
- * state of that component. Example usage:\r
- * <pre><code>\r
-// Handle tab changes on a TabPanel\r
-tabPanel.on('tabchange', function(tabPanel, tab){\r
- Ext.History.add(tabPanel.id + ':' + tab.id);\r
-});\r
-</code></pre>\r
- * @param {String} token The value that defines a particular application-specific history state\r
- * @param {Boolean} preventDuplicates When true, if the passed token matches the current token\r
- * it will not save a new history step. Set to false if the same state can be saved more than once\r
- * at the same history stack location (defaults to true).\r
- */\r
- add: function (token, preventDup) {\r
- if(preventDup !== false){\r
- if(this.getToken() == token){\r
- return true;\r
- }\r
- }\r
- if (Ext.isIE) {\r
- return updateIFrame(token);\r
- } else {\r
- top.location.hash = token;\r
- return true;\r
- }\r
- },\r
-\r
- <div id="method-Ext.History-back"></div>/**\r
- * Programmatically steps back one step in browser history (equivalent to the user pressing the Back button).\r
- */\r
- back: function(){\r
- history.go(-1);\r
- },\r
-\r
- <div id="method-Ext.History-forward"></div>/**\r
- * Programmatically steps forward one step in browser history (equivalent to the user pressing the Forward button).\r
- */\r
- forward: function(){\r
- history.go(1);\r
- },\r
-\r
- <div id="method-Ext.History-getToken"></div>/**\r
- * Retrieves the currently-active history token.\r
- * @return {String} The token\r
- */\r
- getToken: function() {\r
- return ready ? currentToken : getHash();\r
- }\r
- };\r
-})();\r
-Ext.apply(Ext.History, new Ext.util.Observable());</pre>
+Ext.define('Ext.util.History', {
+ singleton: true,
+ alternateClassName: 'Ext.History',
+ mixins: {
+ observable: 'Ext.util.Observable'
+ },
+
+ constructor: function() {
+ var me = this;
+ me.oldIEMode = Ext.isIE6 || Ext.isIE7 || !Ext.isStrict && Ext.isIE8;
+ me.iframe = null;
+ me.hiddenField = null;
+ me.ready = false;
+ me.currentToken = null;
+ },
+
+ getHash: function() {
+ var href = window.location.href,
+ i = href.indexOf("#");
+
+ return i >= 0 ? href.substr(i + 1) : null;
+ },
+
+ doSave: function() {
+ this.hiddenField.value = this.currentToken;
+ },
+
+
+ handleStateChange: function(token) {
+ this.currentToken = token;
+ this.fireEvent('change', token);
+ },
+
+ updateIFrame: function(token) {
+ var html = '<html><body><div id="state">' +
+ Ext.util.Format.htmlEncode(token) +
+ '</div></body></html>';
+
+ try {
+ var doc = this.iframe.contentWindow.document;
+ doc.open();
+ doc.write(html);
+ doc.close();
+ return true;
+ } catch (e) {
+ return false;
+ }
+ },
+
+ checkIFrame: function () {
+ var me = this,
+ contentWindow = me.iframe.contentWindow;
+
+ if (!contentWindow || !contentWindow.document) {
+ Ext.Function.defer(this.checkIFrame, 10, this);
+ return;
+ }
+
+ var doc = contentWindow.document,
+ elem = doc.getElementById("state"),
+ oldToken = elem ? elem.innerText : null,
+ oldHash = me.getHash();
+
+ Ext.TaskManager.start({
+ run: function () {
+ var doc = contentWindow.document,
+ elem = doc.getElementById("state"),
+ newToken = elem ? elem.innerText : null,
+ newHash = me.getHash();
+
+ if (newToken !== oldToken) {
+ oldToken = newToken;
+ me.handleStateChange(newToken);
+ window.top.location.hash = newToken;
+ oldHash = newToken;
+ me.doSave();
+ } else if (newHash !== oldHash) {
+ oldHash = newHash;
+ me.updateIFrame(newHash);
+ }
+ },
+ interval: 50,
+ scope: me
+ });
+ me.ready = true;
+ me.fireEvent('ready', me);
+ },
+
+ startUp: function () {
+ var me = this;
+
+ me.currentToken = me.hiddenField.value || this.getHash();
+
+ if (me.oldIEMode) {
+ me.checkIFrame();
+ } else {
+ var hash = me.getHash();
+ Ext.TaskManager.start({
+ run: function () {
+ var newHash = me.getHash();
+ if (newHash !== hash) {
+ hash = newHash;
+ me.handleStateChange(hash);
+ me.doSave();
+ }
+ },
+ interval: 50,
+ scope: me
+ });
+ me.ready = true;
+ me.fireEvent('ready', me);
+ }
+
+ },
+
+<span id='Ext-util-History-property-fieldId'> /**
+</span> * The id of the hidden field required for storing the current history token.
+ * @type String
+ * @property
+ */
+ fieldId: Ext.baseCSSPrefix + 'history-field',
+<span id='Ext-util-History-property-iframeId'> /**
+</span> * The id of the iframe required by IE to manage the history stack.
+ * @type String
+ * @property
+ */
+ iframeId: Ext.baseCSSPrefix + 'history-frame',
+
+<span id='Ext-util-History-method-init'> /**
+</span> * Initialize the global History instance.
+ * @param {Boolean} onReady (optional) A callback function that will be called once the history
+ * component is fully initialized.
+ * @param {Object} scope (optional) The scope (`this` reference) in which the callback is executed. Defaults to the browser window.
+ */
+ init: function (onReady, scope) {
+ var me = this;
+
+ if (me.ready) {
+ Ext.callback(onReady, scope, [me]);
+ return;
+ }
+
+ if (!Ext.isReady) {
+ Ext.onReady(function() {
+ me.init(onReady, scope);
+ });
+ return;
+ }
+
+ me.hiddenField = Ext.getDom(me.fieldId);
+
+ if (me.oldIEMode) {
+ me.iframe = Ext.getDom(me.iframeId);
+ }
+
+ me.addEvents(
+<span id='Ext-util-History-event-ready'> /**
+</span> * @event ready
+ * Fires when the Ext.util.History singleton has been initialized and is ready for use.
+ * @param {Ext.util.History} The Ext.util.History singleton.
+ */
+ 'ready',
+<span id='Ext-util-History-event-change'> /**
+</span> * @event change
+ * Fires when navigation back or forwards within the local page's history occurs.
+ * @param {String} token An identifier associated with the page state at that point in its history.
+ */
+ 'change'
+ );
+
+ if (onReady) {
+ me.on('ready', onReady, scope, {single: true});
+ }
+ me.startUp();
+ },
+
+<span id='Ext-util-History-method-add'> /**
+</span> * Add a new token to the history stack. This can be any arbitrary value, although it would
+ * commonly be the concatenation of a component id and another id marking the specific history
+ * state of that component. Example usage:
+ *
+ * // Handle tab changes on a TabPanel
+ * tabPanel.on('tabchange', function(tabPanel, tab){
+ * Ext.History.add(tabPanel.id + ':' + tab.id);
+ * });
+ *
+ * @param {String} token The value that defines a particular application-specific history state
+ * @param {Boolean} [preventDuplicates=true] When true, if the passed token matches the current token
+ * it will not save a new history step. Set to false if the same state can be saved more than once
+ * at the same history stack location.
+ */
+ add: function (token, preventDup) {
+ var me = this;
+
+ if (preventDup !== false) {
+ if (me.getToken() === token) {
+ return true;
+ }
+ }
+
+ if (me.oldIEMode) {
+ return me.updateIFrame(token);
+ } else {
+ window.top.location.hash = token;
+ return true;
+ }
+ },
+
+<span id='Ext-util-History-method-back'> /**
+</span> * Programmatically steps back one step in browser history (equivalent to the user pressing the Back button).
+ */
+ back: function() {
+ window.history.go(-1);
+ },
+
+<span id='Ext-util-History-method-forward'> /**
+</span> * Programmatically steps forward one step in browser history (equivalent to the user pressing the Forward button).
+ */
+ forward: function(){
+ window.history.go(1);
+ },
+
+<span id='Ext-util-History-method-getToken'> /**
+</span> * Retrieves the currently-active history token.
+ * @return {String} The token
+ */
+ getToken: function() {
+ return this.ready ? this.currentToken : this.getHash();
+ }
+});</pre>
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