Subversion Repositories Applications.papyrus

/*
        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;
}};