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dengtongyu committed 2018-12-03 17:31:53 +08:00
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/*
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
/* This CSS stylesheet defines styles used by required elements in a flex application page that supports browser history */
#ie_historyFrame { width: 0px; height: 0px; display:none }
#firefox_anchorDiv { width: 0px; height: 0px; display:none }
#safari_formDiv { width: 0px; height: 0px; display:none }
#safari_rememberDiv { width: 0px; height: 0px; display:none }
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/*
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
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,
ie8: false,
firefox: false,
safari: false,
opera: false,
version: -1
};
// 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;
// Flag to denote the existence of onhashchange
var browserHasHashChange = false;
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));
if (browser.version == 8)
{
browser.ie = false;
browser.ie8 = true;
}
} 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;
}
function hashChangeHandler()
{
currentHref = document.location.href;
var flexAppUrl = getHash();
//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);
}
}
// Accessor functions for obtaining specific elements of the page.
function getHistoryFrame()
{
return document.getElementById('ie_historyFrame');
}
function getFormElement()
{
return document.getElementById('safari_formDiv');
}
function getRememberElement()
{
return document.getElementById("safari_remember_field");
}
// Get the Flash player object for performing ExternalInterface callbacks.
// Updated for changes to SWFObject2.
function getPlayer(id) {
var i;
if (id && document.getElementById(id)) {
var r = document.getElementById(id);
if (typeof r.SetVariable != "undefined") {
return r;
}
else {
var o = r.getElementsByTagName("object");
var e = r.getElementsByTagName("embed");
for (i = 0; i < o.length; i++) {
if (typeof o[i].browserURLChange != "undefined")
return o[i];
}
for (i = 0; i < e.length; i++) {
if (typeof e[i].browserURLChange != "undefined")
return e[i];
}
}
}
else {
var o = document.getElementsByTagName("object");
var e = document.getElementsByTagName("embed");
for (i = 0; i < e.length; i++) {
if (typeof e[i].browserURLChange != "undefined")
{
return e[i];
}
}
for (i = 0; i < o.length; i++) {
if (typeof o[i].browserURLChange != "undefined")
{
return o[i];
}
}
}
return undefined;
}
function getPlayers() {
var i;
var players = [];
if (players.length == 0) {
var tmp = document.getElementsByTagName('object');
for (i = 0; i < tmp.length; i++)
{
if (typeof tmp[i].browserURLChange != "undefined")
players.push(tmp[i]);
}
}
if (players.length == 0 || players[0].object == null) {
var tmp = document.getElementsByTagName('embed');
for (i = 0; i < tmp.length; i++)
{
if (typeof tmp[i].browserURLChange != "undefined")
players.push(tmp[i]);
}
}
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 && !browserHasHashChange) {
// 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, just tell the browser to go there
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;
currentHref = document.location.href;
}
}
}
}
if (browser.safari && !browserHasHashChange) {
// 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("|"));
var flexAppUrl = getHash();
if (browser.version < 528.16 /* Anything earlier than Safari 4.0 */)
{
// If it did change and we're running Safari 3.x or earlier,
// 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;
flexAppUrl = historyHash[currentHistoryLength];
}
//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 && !browserHasHashChange) {
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();
//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);
}
}
}
}
var _initialize = function () {
browserHasHashChange = ("onhashchange" in document.body);
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 = 'javascript:false;';
try {
document.body.appendChild(iframe);
} catch(e) {
setTimeout(function() {
document.body.appendChild(iframe);
}, 0);
}
}
if (browser.safari && !browserHasHashChange)
{
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 (browserHasHashChange)
document.body.onhashchange = hashChangeHandler;
}
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]);
}
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);
}
},
/* 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;
}
},
browserURLChange: function(flexAppUrl) {
var objectId = null;
if (browser.ie && currentObjectId != null) {
objectId = currentObjectId;
}
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;
},
getUserAgent: function() {
return navigator.userAgent;
},
getPlatform: function() {
return navigator.platform;
}
}
})();
// 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();} );
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<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<html>
<head>
<META HTTP-EQUIV="Pragma" CONTENT="no-cache">
<META HTTP-EQUIV="Expires" CONTENT="-1">
</head>
<body>
<script>
function processUrl()
{
var pos = url.indexOf("?");
url = pos != -1 ? url.substr(pos + 1) : "";
if (!parent._ie_firstload) {
parent.BrowserHistory.setBrowserURL(url);
try {
parent.BrowserHistory.browserURLChange(url);
} catch(e) { }
} else {
parent._ie_firstload = false;
}
}
var url = document.location.href;
processUrl();
document.write(encodeURIComponent(url));
</script>
Hidden frame for Browser History support.
</body>
</html>