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| /* |
| Copyright (c) 2004-2006, The Dojo Foundation |
| All Rights Reserved. |
| |
| Licensed under the Academic Free License version 2.1 or above OR the |
| modified BSD license. For more information on Dojo licensing, see: |
| |
| http://dojotoolkit.org/community/licensing.shtml |
| */ |
| |
| dojo.provide("dojo.undo.browser"); |
| dojo.require("dojo.io.common"); |
| try { |
| if ((!djConfig["preventBackButtonFix"]) && (!dojo.hostenv.post_load_)) { |
| document.write("<iframe style='border: 0px; width: 1px; height: 1px; position: absolute; bottom: 0px; right: 0px; visibility: visible;' name='djhistory' id='djhistory' src='" + (djConfig["dojoIframeHistoryUrl"] || dojo.hostenv.getBaseScriptUri() + "iframe_history.html") + "'></iframe>"); |
| } |
| } |
| catch (e) { |
| } |
| if (dojo.render.html.opera) { |
| dojo.debug("Opera is not supported with dojo.undo.browser, so back/forward detection will not work."); |
| } |
| dojo.undo.browser = {initialHref:(!dj_undef("window")) ? window.location.href : "", initialHash:(!dj_undef("window")) ? window.location.hash : "", moveForward:false, historyStack:[], forwardStack:[], historyIframe:null, bookmarkAnchor:null, locationTimer:null, setInitialState:function (args) { |
| this.initialState = this._createState(this.initialHref, args, this.initialHash); |
| }, addToHistory:function (args) { |
| this.forwardStack = []; |
| var hash = null; |
| var url = null; |
| if (!this.historyIframe) { |
| if (djConfig["useXDomain"] && !djConfig["dojoIframeHistoryUrl"]) { |
| dojo.debug("dojo.undo.browser: When using cross-domain Dojo builds," + " please save iframe_history.html to your domain and set djConfig.dojoIframeHistoryUrl" + " to the path on your domain to iframe_history.html"); |
| } |
| this.historyIframe = window.frames["djhistory"]; |
| } |
| if (!this.bookmarkAnchor) { |
| this.bookmarkAnchor = document.createElement("a"); |
| dojo.body().appendChild(this.bookmarkAnchor); |
| this.bookmarkAnchor.style.display = "none"; |
| } |
| if (args["changeUrl"]) { |
| hash = "#" + ((args["changeUrl"] !== true) ? args["changeUrl"] : (new Date()).getTime()); |
| if (this.historyStack.length == 0 && this.initialState.urlHash == hash) { |
| this.initialState = this._createState(url, args, hash); |
| return; |
| } else { |
| if (this.historyStack.length > 0 && this.historyStack[this.historyStack.length - 1].urlHash == hash) { |
| this.historyStack[this.historyStack.length - 1] = this._createState(url, args, hash); |
| return; |
| } |
| } |
| this.changingUrl = true; |
| setTimeout("window.location.href = '" + hash + "'; dojo.undo.browser.changingUrl = false;", 1); |
| this.bookmarkAnchor.href = hash; |
| if (dojo.render.html.ie) { |
| url = this._loadIframeHistory(); |
| var oldCB = args["back"] || args["backButton"] || args["handle"]; |
| var tcb = function (handleName) { |
| if (window.location.hash != "") { |
| setTimeout("window.location.href = '" + hash + "';", 1); |
| } |
| oldCB.apply(this, [handleName]); |
| }; |
| if (args["back"]) { |
| args.back = tcb; |
| } else { |
| if (args["backButton"]) { |
| args.backButton = tcb; |
| } else { |
| if (args["handle"]) { |
| args.handle = tcb; |
| } |
| } |
| } |
| var oldFW = args["forward"] || args["forwardButton"] || args["handle"]; |
| var tfw = function (handleName) { |
| if (window.location.hash != "") { |
| window.location.href = hash; |
| } |
| if (oldFW) { |
| oldFW.apply(this, [handleName]); |
| } |
| }; |
| if (args["forward"]) { |
| args.forward = tfw; |
| } else { |
| if (args["forwardButton"]) { |
| args.forwardButton = tfw; |
| } else { |
| if (args["handle"]) { |
| args.handle = tfw; |
| } |
| } |
| } |
| } else { |
| if (dojo.render.html.moz) { |
| if (!this.locationTimer) { |
| this.locationTimer = setInterval("dojo.undo.browser.checkLocation();", 200); |
| } |
| } |
| } |
| } else { |
| url = this._loadIframeHistory(); |
| } |
| this.historyStack.push(this._createState(url, args, hash)); |
| }, checkLocation:function () { |
| if (!this.changingUrl) { |
| var hsl = this.historyStack.length; |
| if ((window.location.hash == this.initialHash || window.location.href == this.initialHref) && (hsl == 1)) { |
| this.handleBackButton(); |
| return; |
| } |
| if (this.forwardStack.length > 0) { |
| if (this.forwardStack[this.forwardStack.length - 1].urlHash == window.location.hash) { |
| this.handleForwardButton(); |
| return; |
| } |
| } |
| if ((hsl >= 2) && (this.historyStack[hsl - 2])) { |
| if (this.historyStack[hsl - 2].urlHash == window.location.hash) { |
| this.handleBackButton(); |
| return; |
| } |
| } |
| } |
| }, iframeLoaded:function (evt, ifrLoc) { |
| if (!dojo.render.html.opera) { |
| var query = this._getUrlQuery(ifrLoc.href); |
| if (query == null) { |
| if (this.historyStack.length == 1) { |
| this.handleBackButton(); |
| } |
| return; |
| } |
| if (this.moveForward) { |
| this.moveForward = false; |
| return; |
| } |
| if (this.historyStack.length >= 2 && query == this._getUrlQuery(this.historyStack[this.historyStack.length - 2].url)) { |
| this.handleBackButton(); |
| } else { |
| if (this.forwardStack.length > 0 && query == this._getUrlQuery(this.forwardStack[this.forwardStack.length - 1].url)) { |
| this.handleForwardButton(); |
| } |
| } |
| } |
| }, handleBackButton:function () { |
| var current = this.historyStack.pop(); |
| if (!current) { |
| return; |
| } |
| var last = this.historyStack[this.historyStack.length - 1]; |
| if (!last && this.historyStack.length == 0) { |
| last = this.initialState; |
| } |
| if (last) { |
| if (last.kwArgs["back"]) { |
| last.kwArgs["back"](); |
| } else { |
| if (last.kwArgs["backButton"]) { |
| last.kwArgs["backButton"](); |
| } else { |
| if (last.kwArgs["handle"]) { |
| last.kwArgs.handle("back"); |
| } |
| } |
| } |
| } |
| this.forwardStack.push(current); |
| }, handleForwardButton:function () { |
| var last = this.forwardStack.pop(); |
| if (!last) { |
| return; |
| } |
| if (last.kwArgs["forward"]) { |
| last.kwArgs.forward(); |
| } else { |
| if (last.kwArgs["forwardButton"]) { |
| last.kwArgs.forwardButton(); |
| } else { |
| if (last.kwArgs["handle"]) { |
| last.kwArgs.handle("forward"); |
| } |
| } |
| } |
| this.historyStack.push(last); |
| }, _createState:function (url, args, hash) { |
| return {"url":url, "kwArgs":args, "urlHash":hash}; |
| }, _getUrlQuery:function (url) { |
| var segments = url.split("?"); |
| if (segments.length < 2) { |
| return null; |
| } else { |
| return segments[1]; |
| } |
| }, _loadIframeHistory:function () { |
| var url = (djConfig["dojoIframeHistoryUrl"] || dojo.hostenv.getBaseScriptUri() + "iframe_history.html") + "?" + (new Date()).getTime(); |
| this.moveForward = true; |
| dojo.io.setIFrameSrc(this.historyIframe, url, false); |
| return url; |
| }}; |
| |