history.js
上传用户:sbolele
上传日期:2022-08-04
资源大小:14919k
文件大小:24k
- BrowserHistoryUtils = {
- addEvent: function(elm, evType, fn, useCapture) {
- useCapture = useCapture || false;
- if (elm.addEventListener) {
- elm.addEventListener(evType, fn, useCapture);
- return true;
- }
- else if (elm.attachEvent) {
- var r = elm.attachEvent('on' + evType, fn);
- return r;
- }
- else {
- elm['on' + evType] = fn;
- }
- }
- }
- BrowserHistory = (function() {
- // type of browser
- var browser = {
- ie: false,
- firefox: false,
- safari: false,
- opera: false,
- version: -1
- };
- // if setDefaultURL has been called, our first clue
- // that the SWF is ready and listening
- //var swfReady = false;
- // the URL we'll send to the SWF once it is ready
- //var pendingURL = '';
- // Default app state URL to use when no fragment ID present
- var defaultHash = '';
- // Last-known app state URL
- var currentHref = document.location.href;
- // Initial URL (used only by IE)
- var initialHref = document.location.href;
- // Initial URL (used only by IE)
- var initialHash = document.location.hash;
- // History frame source URL prefix (used only by IE)
- var historyFrameSourcePrefix = 'history/historyFrame.html?';
- // History maintenance (used only by Safari)
- var currentHistoryLength = -1;
- var historyHash = [];
- var initialState = createState(initialHref, initialHref + '#' + initialHash, initialHash);
- var backStack = [];
- var forwardStack = [];
- var currentObjectId = null;
- //UserAgent detection
- var useragent = navigator.userAgent.toLowerCase();
- if (useragent.indexOf("opera") != -1) {
- browser.opera = true;
- } else if (useragent.indexOf("msie") != -1) {
- browser.ie = true;
- browser.version = parseFloat(useragent.substring(useragent.indexOf('msie') + 4));
- } else if (useragent.indexOf("safari") != -1) {
- browser.safari = true;
- browser.version = parseFloat(useragent.substring(useragent.indexOf('safari') + 7));
- } else if (useragent.indexOf("gecko") != -1) {
- browser.firefox = true;
- }
- if (browser.ie == true && browser.version == 7) {
- window["_ie_firstload"] = false;
- }
- // Accessor functions for obtaining specific elements of the page.
- function getHistoryFrame()
- {
- return document.getElementById('ie_historyFrame');
- }
- function getAnchorElement()
- {
- return document.getElementById('firefox_anchorDiv');
- }
- function getFormElement()
- {
- return document.getElementById('safari_formDiv');
- }
- function getRememberElement()
- {
- return document.getElementById("safari_remember_field");
- }
- /* Get the Flash player object for performing ExternalInterface callbacks. */
- function getPlayer(objectId) {
- var objectId = objectId || null;
- var player = null; /* AJH, needed? = document.getElementById(getPlayerId()); */
- if (browser.ie && objectId != null) {
- player = document.getElementById(objectId);
- }
- if (player == null) {
- player = document.getElementsByTagName('object')[0];
- }
-
- if (player == null || player.object == null) {
- player = document.getElementsByTagName('embed')[0];
- }
- return player;
- }
-
- function getPlayers() {
- var players = [];
- if (players.length == 0) {
- var tmp = document.getElementsByTagName('object');
- players = tmp;
- }
-
- if (players.length == 0 || players[0].object == null) {
- var tmp = document.getElementsByTagName('embed');
- players = tmp;
- }
- return players;
- }
- function getIframeHash() {
- var doc = getHistoryFrame().contentWindow.document;
- var hash = String(doc.location.search);
- if (hash.length == 1 && hash.charAt(0) == "?") {
- hash = "";
- }
- else if (hash.length >= 2 && hash.charAt(0) == "?") {
- hash = hash.substring(1);
- }
- return hash;
- }
- /* Get the current location hash excluding the '#' symbol. */
- function getHash() {
- // It would be nice if we could use document.location.hash here,
- // but it's faulty sometimes.
- var idx = document.location.href.indexOf('#');
- return (idx >= 0) ? document.location.href.substr(idx+1) : '';
- }
- /* Get the current location hash excluding the '#' symbol. */
- function setHash(hash) {
- // It would be nice if we could use document.location.hash here,
- // but it's faulty sometimes.
- if (hash == '') hash = '#'
- document.location.hash = hash;
- }
- function createState(baseUrl, newUrl, flexAppUrl) {
- return { 'baseUrl': baseUrl, 'newUrl': newUrl, 'flexAppUrl': flexAppUrl, 'title': null };
- }
- /* Add a history entry to the browser.
- * baseUrl: the portion of the location prior to the '#'
- * newUrl: the entire new URL, including '#' and following fragment
- * flexAppUrl: the portion of the location following the '#' only
- */
- function addHistoryEntry(baseUrl, newUrl, flexAppUrl) {
- //delete all the history entries
- forwardStack = [];
- if (browser.ie) {
- //Check to see if we are being asked to do a navigate for the first
- //history entry, and if so ignore, because it's coming from the creation
- //of the history iframe
- if (flexAppUrl == defaultHash && document.location.href == initialHref && window['_ie_firstload']) {
- currentHref = initialHref;
- return;
- }
- if ((!flexAppUrl || flexAppUrl == defaultHash) && window['_ie_firstload']) {
- newUrl = baseUrl + '#' + defaultHash;
- flexAppUrl = defaultHash;
- } else {
- // for IE, tell the history frame to go somewhere without a '#'
- // in order to get this entry into the browser history.
- getHistoryFrame().src = historyFrameSourcePrefix + flexAppUrl;
- }
- setHash(flexAppUrl);
- } else {
- //ADR
- if (backStack.length == 0 && initialState.flexAppUrl == flexAppUrl) {
- initialState = createState(baseUrl, newUrl, flexAppUrl);
- } else if(backStack.length > 0 && backStack[backStack.length - 1].flexAppUrl == flexAppUrl) {
- backStack[backStack.length - 1] = createState(baseUrl, newUrl, flexAppUrl);
- }
- if (browser.safari) {
- // for Safari, submit a form whose action points to the desired URL
- if (browser.version <= 419.3) {
- var file = window.location.pathname.toString();
- file = file.substring(file.lastIndexOf("/")+1);
- getFormElement().innerHTML = '<form name="historyForm" action="'+file+'#' + flexAppUrl + '" method="GET"></form>';
- //get the current elements and add them to the form
- var qs = window.location.search.substring(1);
- var qs_arr = qs.split("&");
- for (var i = 0; i < qs_arr.length; i++) {
- var tmp = qs_arr[i].split("=");
- var elem = document.createElement("input");
- elem.type = "hidden";
- elem.name = tmp[0];
- elem.value = tmp[1];
- document.forms.historyForm.appendChild(elem);
- }
- document.forms.historyForm.submit();
- } else {
- top.location.hash = flexAppUrl;
- }
- // We also have to maintain the history by hand for Safari
- historyHash[history.length] = flexAppUrl;
- _storeStates();
- } else {
- // Otherwise, write an anchor into the page and tell the browser to go there
- addAnchor(flexAppUrl);
- setHash(flexAppUrl);
- }
- }
- backStack.push(createState(baseUrl, newUrl, flexAppUrl));
- }
- function _storeStates() {
- if (browser.safari) {
- getRememberElement().value = historyHash.join(",");
- }
- }
- function handleBackButton() {
- //The "current" page is always at the top of the history stack.
- var current = backStack.pop();
- if (!current) { return; }
- var last = backStack[backStack.length - 1];
- if (!last && backStack.length == 0){
- last = initialState;
- }
- forwardStack.push(current);
- }
- function handleForwardButton() {
- //summary: private method. Do not call this directly.
- var last = forwardStack.pop();
- if (!last) { return; }
- backStack.push(last);
- }
- function handleArbitraryUrl() {
- //delete all the history entries
- forwardStack = [];
- }
- /* Called periodically to poll to see if we need to detect navigation that has occurred */
- function checkForUrlChange() {
- if (browser.ie) {
- if (currentHref != document.location.href && currentHref + '#' != document.location.href) {
- //This occurs when the user has navigated to a specific URL
- //within the app, and didn't use browser back/forward
- //IE seems to have a bug where it stops updating the URL it
- //shows the end-user at this point, but programatically it
- //appears to be correct. Do a full app reload to get around
- //this issue.
- if (browser.version < 7) {
- currentHref = document.location.href;
- document.location.reload();
- } else {
- if (getHash() != getIframeHash()) {
- // this.iframe.src = this.blankURL + hash;
- var sourceToSet = historyFrameSourcePrefix + getHash();
- getHistoryFrame().src = sourceToSet;
- }
- }
- }
- }
- if (browser.safari) {
- // For Safari, we have to check to see if history.length changed.
- if (currentHistoryLength >= 0 && history.length != currentHistoryLength) {
- //alert("did change: " + history.length + ", " + historyHash.length + "|" + historyHash[history.length] + "|>" + historyHash.join("|"));
- // If it did change, then we have to look the old state up
- // in our hand-maintained array since document.location.hash
- // won't have changed, then call back into BrowserManager.
- currentHistoryLength = history.length;
- var flexAppUrl = historyHash[currentHistoryLength];
- if (flexAppUrl == '') {
- //flexAppUrl = defaultHash;
- }
- //ADR: to fix multiple
- if (typeof BrowserHistory_multiple != "undefined" && BrowserHistory_multiple == true) {
- var pl = getPlayers();
- for (var i = 0; i < pl.length; i++) {
- pl[i].browserURLChange(flexAppUrl);
- }
- } else {
- getPlayer().browserURLChange(flexAppUrl);
- }
- _storeStates();
- }
- }
- if (browser.firefox) {
- if (currentHref != document.location.href) {
- var bsl = backStack.length;
- var urlActions = {
- back: false,
- forward: false,
- set: false
- }
- if ((window.location.hash == initialHash || window.location.href == initialHref) && (bsl == 1)) {
- urlActions.back = true;
- // FIXME: could this ever be a forward button?
- // we can't clear it because we still need to check for forwards. Ugg.
- // clearInterval(this.locationTimer);
- handleBackButton();
- }
-
- // first check to see if we could have gone forward. We always halt on
- // a no-hash item.
- if (forwardStack.length > 0) {
- if (forwardStack[forwardStack.length-1].flexAppUrl == getHash()) {
- urlActions.forward = true;
- handleForwardButton();
- }
- }
- // ok, that didn't work, try someplace back in the history stack
- if ((bsl >= 2) && (backStack[bsl - 2])) {
- if (backStack[bsl - 2].flexAppUrl == getHash()) {
- urlActions.back = true;
- handleBackButton();
- }
- }
-
- if (!urlActions.back && !urlActions.forward) {
- var foundInStacks = {
- back: -1,
- forward: -1
- }
- for (var i = 0; i < backStack.length; i++) {
- if (backStack[i].flexAppUrl == getHash() && i != (bsl - 2)) {
- arbitraryUrl = true;
- foundInStacks.back = i;
- }
- }
- for (var i = 0; i < forwardStack.length; i++) {
- if (forwardStack[i].flexAppUrl == getHash() && i != (bsl - 2)) {
- arbitraryUrl = true;
- foundInStacks.forward = i;
- }
- }
- handleArbitraryUrl();
- }
- // Firefox changed; do a callback into BrowserManager to tell it.
- currentHref = document.location.href;
- var flexAppUrl = getHash();
- if (flexAppUrl == '') {
- //flexAppUrl = defaultHash;
- }
- //ADR: to fix multiple
- if (typeof BrowserHistory_multiple != "undefined" && BrowserHistory_multiple == true) {
- var pl = getPlayers();
- for (var i = 0; i < pl.length; i++) {
- pl[i].browserURLChange(flexAppUrl);
- }
- } else {
- getPlayer().browserURLChange(flexAppUrl);
- }
- }
- }
- //setTimeout(checkForUrlChange, 50);
- }
- /* Write an anchor into the page to legitimize it as a URL for Firefox et al. */
- function addAnchor(flexAppUrl)
- {
- if (document.getElementsByName(flexAppUrl).length == 0) {
- getAnchorElement().innerHTML += "<a name='" + flexAppUrl + "'>" + flexAppUrl + "</a>";
- }
- }
- var _initialize = function () {
- if (browser.ie)
- {
- var scripts = document.getElementsByTagName('script');
- for (var i = 0, s; s = scripts[i]; i++) {
- if (s.src.indexOf("history.js") > -1) {
- var iframe_location = (new String(s.src)).replace("history.js", "historyFrame.html");
- }
- }
- historyFrameSourcePrefix = iframe_location + "?";
- var src = historyFrameSourcePrefix;
- var iframe = document.createElement("iframe");
- iframe.id = 'ie_historyFrame';
- iframe.name = 'ie_historyFrame';
- //iframe.src = historyFrameSourcePrefix;
- try {
- document.body.appendChild(iframe);
- } catch(e) {
- setTimeout(function() {
- document.body.appendChild(iframe);
- }, 0);
- }
- }
- if (browser.safari)
- {
- var rememberDiv = document.createElement("div");
- rememberDiv.id = 'safari_rememberDiv';
- document.body.appendChild(rememberDiv);
- rememberDiv.innerHTML = '<input type="text" id="safari_remember_field" style="width: 500px;">';
- var formDiv = document.createElement("div");
- formDiv.id = 'safari_formDiv';
- document.body.appendChild(formDiv);
- var reloader_content = document.createElement('div');
- reloader_content.id = 'safarireloader';
- var scripts = document.getElementsByTagName('script');
- for (var i = 0, s; s = scripts[i]; i++) {
- if (s.src.indexOf("history.js") > -1) {
- html = (new String(s.src)).replace(".js", ".html");
- }
- }
- reloader_content.innerHTML = '<iframe id="safarireloader-iframe" src="about:blank" frameborder="no" scrolling="no"></iframe>';
- document.body.appendChild(reloader_content);
- reloader_content.style.position = 'absolute';
- reloader_content.style.left = reloader_content.style.top = '-9999px';
- iframe = reloader_content.getElementsByTagName('iframe')[0];
- if (document.getElementById("safari_remember_field").value != "" ) {
- historyHash = document.getElementById("safari_remember_field").value.split(",");
- }
- }
- if (browser.firefox)
- {
- var anchorDiv = document.createElement("div");
- anchorDiv.id = 'firefox_anchorDiv';
- document.body.appendChild(anchorDiv);
- }
-
- //setTimeout(checkForUrlChange, 50);
- }
- return {
- historyHash: historyHash,
- backStack: function() { return backStack; },
- forwardStack: function() { return forwardStack },
- getPlayer: getPlayer,
- initialize: function(src) {
- _initialize(src);
- },
- setURL: function(url) {
- document.location.href = url;
- },
- getURL: function() {
- return document.location.href;
- },
- getTitle: function() {
- return document.title;
- },
- setTitle: function(title) {
- try {
- backStack[backStack.length - 1].title = title;
- } catch(e) { }
- //if on safari, set the title to be the empty string.
- if (browser.safari) {
- if (title == "") {
- try {
- var tmp = window.location.href.toString();
- title = tmp.substring((tmp.lastIndexOf("/")+1), tmp.lastIndexOf("#"));
- } catch(e) {
- title = "";
- }
- }
- }
- document.title = title;
- },
- setDefaultURL: function(def)
- {
- defaultHash = def;
- def = getHash();
- //trailing ? is important else an extra frame gets added to the history
- //when navigating back to the first page. Alternatively could check
- //in history frame navigation to compare # and ?.
- if (browser.ie)
- {
- window['_ie_firstload'] = true;
- var sourceToSet = historyFrameSourcePrefix + def;
- var func = function() {
- getHistoryFrame().src = sourceToSet;
- window.location.replace("#" + def);
- setInterval(checkForUrlChange, 50);
- }
- try {
- func();
- } catch(e) {
- window.setTimeout(function() { func(); }, 0);
- }
- }
- if (browser.safari)
- {
- currentHistoryLength = history.length;
- if (historyHash.length == 0) {
- historyHash[currentHistoryLength] = def;
- var newloc = "#" + def;
- window.location.replace(newloc);
- } else {
- //alert(historyHash[historyHash.length-1]);
- }
- //setHash(def);
- setInterval(checkForUrlChange, 50);
- }
-
-
- if (browser.firefox || browser.opera)
- {
- var reg = new RegExp("#" + def + "$");
- if (window.location.toString().match(reg)) {
- } else {
- var newloc ="#" + def;
- window.location.replace(newloc);
- }
- setInterval(checkForUrlChange, 50);
- //setHash(def);
- }
- },
- /* Set the current browser URL; called from inside BrowserManager to propagate
- * the application state out to the container.
- */
- setBrowserURL: function(flexAppUrl, objectId) {
- if (browser.ie && typeof objectId != "undefined") {
- currentObjectId = objectId;
- }
- //fromIframe = fromIframe || false;
- //fromFlex = fromFlex || false;
- //alert("setBrowserURL: " + flexAppUrl);
- //flexAppUrl = (flexAppUrl == "") ? defaultHash : flexAppUrl ;
- var pos = document.location.href.indexOf('#');
- var baseUrl = pos != -1 ? document.location.href.substr(0, pos) : document.location.href;
- var newUrl = baseUrl + '#' + flexAppUrl;
- if (document.location.href != newUrl && document.location.href + '#' != newUrl) {
- currentHref = newUrl;
- addHistoryEntry(baseUrl, newUrl, flexAppUrl);
- currentHistoryLength = history.length;
- }
- return false;
- },
- browserURLChange: function(flexAppUrl) {
- var objectId = null;
- if (browser.ie && currentObjectId != null) {
- objectId = currentObjectId;
- }
- pendingURL = '';
-
- if (typeof BrowserHistory_multiple != "undefined" && BrowserHistory_multiple == true) {
- var pl = getPlayers();
- for (var i = 0; i < pl.length; i++) {
- try {
- pl[i].browserURLChange(flexAppUrl);
- } catch(e) { }
- }
- } else {
- try {
- getPlayer(objectId).browserURLChange(flexAppUrl);
- } catch(e) { }
- }
- currentObjectId = null;
- }
- }
- })();
- // Initialization
- // Automated unit testing and other diagnostics
- function setURL(url)
- {
- document.location.href = url;
- }
- function backButton()
- {
- history.back();
- }
- function forwardButton()
- {
- history.forward();
- }
- function goForwardOrBackInHistory(step)
- {
- history.go(step);
- }
- //BrowserHistoryUtils.addEvent(window, "load", function() { BrowserHistory.initialize(); });
- (function(i) {
- var u =navigator.userAgent;var e=/*@cc_on!@*/false;
- var st = setTimeout;
- if(/webkit/i.test(u)){
- st(function(){
- var dr=document.readyState;
- if(dr=="loaded"||dr=="complete"){i()}
- else{st(arguments.callee,10);}},10);
- } else if((/mozilla/i.test(u)&&!/(compati)/.test(u)) || (/opera/i.test(u))){
- document.addEventListener("DOMContentLoaded",i,false);
- } else if(e){
- (function(){
- var t=document.createElement('doc:rdy');
- try{t.doScroll('left');
- i();t=null;
- }catch(e){st(arguments.callee,0);}})();
- } else{
- window.onload=i;
- }
- })( function() {BrowserHistory.initialize();} );