http://git-wip-us.apache.org/repos/asf/incubator-stratos/blob/6b1dba58/dependencies/org.wso2.carbon.ui/src/main/resources/web/admin/js/dhtmlHistory.js ---------------------------------------------------------------------- diff --git a/dependencies/org.wso2.carbon.ui/src/main/resources/web/admin/js/dhtmlHistory.js b/dependencies/org.wso2.carbon.ui/src/main/resources/web/admin/js/dhtmlHistory.js new file mode 100644 index 0000000..907e769 --- /dev/null +++ b/dependencies/org.wso2.carbon.ui/src/main/resources/web/admin/js/dhtmlHistory.js @@ -0,0 +1,925 @@ +/** + Copyright (c) 2005, Brad Neuberg, [email protected] + http://codinginparadise.org + + Permission is hereby granted, free of charge, to any person obtaining + a copy of this software and associated documentation files (the "Software"), + to deal in the Software without restriction, including without limitation + the rights to use, copy, modify, merge, publish, distribute, sublicense, + and/or sell copies of the Software, and to permit persons to whom the + Software is furnished to do so, subject to the following conditions: + + The above copyright notice and this permission notice shall be + included in all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES + OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY + CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT + OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR + THE USE OR OTHER DEALINGS IN THE SOFTWARE. + + The JSON class near the end of this file is + Copyright 2005, JSON.org +*/ + +/** An object that provides DHTML history, history data, and bookmarking + for AJAX applications. */ +window.dhtmlHistory = { + /** Initializes our DHTML history. You should + call this after the page is finished loading. */ + /** public */ initialize: function() { + // only Internet Explorer needs to be explicitly initialized; + // other browsers don't have its particular behaviors. + // Basicly, IE doesn't autofill form data until the page + // is finished loading, which means historyStorage won't + // work until onload has been fired. + if (this.isInternetExplorer() == false) { + return; + } + + // if this is the first time this page has loaded... + if (historyStorage.hasKey("DhtmlHistory_pageLoaded") == false) { + this.fireOnNewListener = false; + this.firstLoad = true; + historyStorage.put("DhtmlHistory_pageLoaded", true); + } + // else if this is a fake onload event + else { + this.fireOnNewListener = true; + this.firstLoad = false; + } + }, + + /** Adds a history change listener. Note that + only one listener is supported at this + time. */ + /** public */ addListener: function(callback) { + this.listener = callback; + + // if the page was just loaded and we + // should not ignore it, fire an event + // to our new listener now + if (this.fireOnNewListener == true) { + this.fireHistoryEvent(this.currentLocation); + this.fireOnNewListener = false; + } + }, + + /** public */ add: function(newLocation, historyData) { + // most browsers require that we wait a certain amount of time before changing the + // location, such as 200 milliseconds; rather than forcing external callers to use + // window.setTimeout to account for this to prevent bugs, we internally handle this + // detail by using a 'currentWaitTime' variable and have requests wait in line + var self = this; + var addImpl = function() { + // indicate that the current wait time is now less + if (self.currentWaitTime > 0) + self.currentWaitTime = self.currentWaitTime - self.WAIT_TIME; + + // remove any leading hash symbols on newLocation + newLocation = self.removeHash(newLocation); + + // IE has a strange bug; if the newLocation + // is the same as _any_ preexisting id in the + // document, then the history action gets recorded + // twice; throw a programmer exception if there is + // an element with this ID + var idCheck = document.getElementById(newLocation); + if (idCheck != undefined || idCheck != null) { + var message = + "Exception: History locations can not have " + + "the same value as _any_ id's " + + "that might be in the document, " + + "due to a bug in Internet " + + "Explorer; please ask the " + + "developer to choose a history " + + "location that does not match " + + "any HTML id's in this " + + "document. The following ID " + + "is already taken and can not " + + "be a location: " + + newLocation; + + throw message; + } + + // store the history data into history storage + historyStorage.put(newLocation, historyData); + + // indicate to the browser to ignore this upcomming + // location change + self.ignoreLocationChange = true; + + // indicate to IE that this is an atomic location change + // block + this.ieAtomicLocationChange = true; + + // save this as our current location + self.currentLocation = newLocation; + + // change the browser location + window.location.hash = newLocation; + + // change the hidden iframe's location if on IE + if (self.isInternetExplorer()) + self.iframe.src = "blank.html?" + newLocation; + + // end of atomic location change block + // for IE + this.ieAtomicLocationChange = false; + }; + + // now execute this add request after waiting a certain amount of time, so as to + // queue up requests + window.setTimeout(addImpl, this.currentWaitTime); + + // indicate that the next request will have to wait for awhile + this.currentWaitTime = this.currentWaitTime + this.WAIT_TIME; + }, + + /** public */ isFirstLoad: function() { + if (this.firstLoad == true) { + return true; + } + else { + return false; + } + }, + + /** public */ isInternational: function() { + return false; + }, + + /** public */ getVersion: function() { + return "0.05"; + }, + + /** Gets the current hash value that is in the browser's + location bar, removing leading # symbols if they are present. */ + /** public */ getCurrentLocation: function() { + var currentLocation = this.removeHash(window.location.hash); + + return currentLocation; + }, + + + + + + /** Our current hash location, without the "#" symbol. */ + /** private */ currentLocation: null, + + /** Our history change listener. */ + /** private */ listener: null, + + /** A hidden IFrame we use in Internet Explorer to detect history + changes. */ + /** private */ iframe: null, + + /** Indicates to the browser whether to ignore location changes. */ + /** private */ ignoreLocationChange: null, + + /** The amount of time in milliseconds that we should wait between add requests. + Firefox is okay with 200 ms, but Internet Explorer needs 400. */ + /** private */ WAIT_TIME: 200, + + /** The amount of time in milliseconds an add request has to wait in line before being + run on a window.setTimeout. */ + /** private */ currentWaitTime: 0, + + /** A flag that indicates that we should fire a history change event + when we are ready, i.e. after we are initialized and + we have a history change listener. This is needed due to + an edge case in browsers other than Internet Explorer; if + you leave a page entirely then return, we must fire this + as a history change event. Unfortunately, we have lost + all references to listeners from earlier, because JavaScript + clears out. */ + /** private */ fireOnNewListener: null, + + /** A variable that indicates whether this is the first time + this page has been loaded. If you go to a web page, leave + it for another one, and then return, the page's onload + listener fires again. We need a way to differentiate + between the first page load and subsequent ones. + This variable works hand in hand with the pageLoaded + variable we store into historyStorage.*/ + /** private */ firstLoad: null, + + /** A variable to handle an important edge case in Internet + Explorer. In IE, if a user manually types an address into + their browser's location bar, we must intercept this by + continiously checking the location bar with an timer + interval. However, if we manually change the location + bar ourselves programmatically, when using our hidden + iframe, we need to ignore these changes. Unfortunately, + these changes are not atomic, so we surround them with + the variable 'ieAtomicLocationChange', that if true, + means we are programmatically setting the location and + should ignore this atomic chunked change. */ + /** private */ ieAtomicLocationChange: null, + + /** Creates the DHTML history infrastructure. */ + /** private */ create: function() { + // get our initial location + var initialHash = this.getCurrentLocation(); + + // save this as our current location + this.currentLocation = initialHash; + + // write out a hidden iframe for IE and + // set the amount of time to wait between add() requests + if (this.isInternetExplorer()) { + document.write("<iframe style='border: 0px; width: 1px; " + + "height: 1px; position: absolute; bottom: 0px; " + + "right: 0px; visibility: visible;' " + + "name='DhtmlHistoryFrame' id='DhtmlHistoryFrame' " + + "src='blank.html?" + initialHash + "'>" + + "</iframe>"); + // wait 400 milliseconds between history + // updates on IE, versus 200 on Firefox + this.WAIT_TIME = 400; + } + + // add an unload listener for the page; this is + // needed for Firefox 1.5+ because this browser caches all + // dynamic updates to the page, which can break some of our + // logic related to testing whether this is the first instance + // a page has loaded or whether it is being pulled from the cache + var self = this; + window.onunload = function() { + self.firstLoad = null; + }; + + // determine if this is our first page load; + // for Internet Explorer, we do this in + // this.iframeLoaded(), which is fired on + // page load. We do it there because + // we have no historyStorage at this point + // in IE, which only exists after the page + // is finished loading for that browser + if (this.isInternetExplorer() == false) { + if (historyStorage.hasKey("DhtmlHistory_pageLoaded") == false) { + this.ignoreLocationChange = true; + this.firstLoad = true; + historyStorage.put("DhtmlHistory_pageLoaded", true); + } + else { + // indicate that we want to pay attention + // to this location change + this.ignoreLocationChange = false; + // For browser's other than IE, fire + // a history change event; on IE, + // the event will be thrown automatically + // when it's hidden iframe reloads + // on page load. + // Unfortunately, we don't have any + // listeners yet; indicate that we want + // to fire an event when a listener + // is added. + this.fireOnNewListener = true; + } + } + else { // Internet Explorer + // the iframe will get loaded on page + // load, and we want to ignore this fact + this.ignoreLocationChange = true; + } + + if (this.isInternetExplorer()) { + this.iframe = document.getElementById("DhtmlHistoryFrame"); + } + + // other browsers can use a location handler that checks + // at regular intervals as their primary mechanism; + // we use it for Internet Explorer as well to handle + // an important edge case; see checkLocation() for + // details + var self = this; + var locationHandler = function() { + self.checkLocation(); + }; + setInterval(locationHandler, 100); + }, + + /** Notify the listener of new history changes. */ + /** private */ fireHistoryEvent: function(newHash) { + // extract the value from our history storage for + // this hash + var historyData = historyStorage.get(newHash); + + // call our listener + this.listener.call(null, newHash, historyData); + }, + + /** Sees if the browsers has changed location. This is the primary history mechanism + for Firefox. For Internet Explorer, we use this to handle an important edge case: + if a user manually types in a new hash value into their Internet Explorer location + bar and press enter, we want to intercept this and notify any history listener. */ + /** private */ checkLocation: function() { + // ignore any location changes that we made ourselves + // for browsers other than Internet Explorer + if (this.isInternetExplorer() == false + && this.ignoreLocationChange == true) { + this.ignoreLocationChange = false; + return; + } + + // if we are dealing with Internet Explorer + // and we are in the middle of making a location + // change from an iframe, ignore it + if (this.isInternetExplorer() == false + && this.ieAtomicLocationChange == true) { + return; + } + + // get hash location + var hash = this.getCurrentLocation(); + + // see if there has been a change + if (hash == this.currentLocation) + return; + + // on Internet Explorer, we need to intercept users manually + // entering locations into the browser; we do this by comparing + // the browsers location against the iframes location; if they + // differ, we are dealing with a manual event and need to + // place it inside our history, otherwise we can return + this.ieAtomicLocationChange = true; + + if (this.isInternetExplorer() + && this.getIFrameHash() != hash) { + this.iframe.src = "blank.html?" + hash; + } + else if (this.isInternetExplorer()) { + // the iframe is unchanged + return; + } + + // save this new location + this.currentLocation = hash; + + this.ieAtomicLocationChange = false; + + // notify listeners of the change + this.fireHistoryEvent(hash); + }, + + /** Gets the current location of the hidden IFrames + that is stored as history. For Internet Explorer. */ + /** private */ getIFrameHash: function() { + // get the new location + var historyFrame = document.getElementById("DhtmlHistoryFrame"); + var doc = historyFrame.contentWindow.document; + var hash = new 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; + }, + + /** Removes any leading hash that might be on a location. */ + /** private */ removeHash: function(hashValue) { + if (hashValue == null || hashValue == undefined) + return null; + else if (hashValue == "") + return ""; + else if (hashValue.length == 1 && hashValue.charAt(0) == "#") + return ""; + else if (hashValue.length > 1 && hashValue.charAt(0) == "#") + return hashValue.substring(1); + else + return hashValue; + }, + + /** For IE, says when the hidden iframe has finished loading. */ + /** private */ iframeLoaded: function(newLocation) { + // ignore any location changes that we made ourselves + if (this.ignoreLocationChange == true) { + this.ignoreLocationChange = false; + return; + } + + // get the new location + var hash = new String(newLocation.search); + if (hash.length == 1 && hash.charAt(0) == "?") + hash = ""; + else if (hash.length >= 2 && hash.charAt(0) == "?") + hash = hash.substring(1); + + // move to this location in the browser location bar + // if we are not dealing with a page load event + if (this.pageLoadEvent != true) { + window.location.hash = hash; + } + + // notify listeners of the change + this.fireHistoryEvent(hash); + }, + + /** Determines if this is Internet Explorer. */ + /** private */ isInternetExplorer: function() { + var userAgent = navigator.userAgent.toLowerCase(); + if (document.all && userAgent.indexOf('msie')!=-1) { + return true; + } + else { + return false; + } + } +}; + + + + + + + + + + + + +/** An object that uses a hidden form to store history state + across page loads. The chief mechanism for doing so is using + the fact that browser's save the text in form data for the + life of the browser and cache, which means the text is still + there when the user navigates back to the page. See + http://codinginparadise.org/weblog/2005/08/ajax-tutorial-saving-session-across.html + for full details. */ +window.historyStorage = { + /** If true, we are debugging and show the storage textfield. */ + /** public */ debugging: false, + + /** Our hash of key name/values. */ + /** private */ storageHash: new Object(), + + /** If true, we have loaded our hash table out of the storage form. */ + /** private */ hashLoaded: false, + + /** public */ put: function(key, value) { + this.assertValidKey(key); + + // if we already have a value for this, + // remove the value before adding the + // new one + if (this.hasKey(key)) { + this.remove(key); + } + + // store this new key + this.storageHash[key] = value; + + // save and serialize the hashtable into the form + this.saveHashTable(); + }, + + /** public */ get: function(key) { + this.assertValidKey(key); + + // make sure the hash table has been loaded + // from the form + this.loadHashTable(); + + var value = this.storageHash[key]; + + if (value == undefined) + return null; + else + return value; + }, + + /** public */ remove: function(key) { + this.assertValidKey(key); + + // make sure the hash table has been loaded + // from the form + this.loadHashTable(); + + // delete the value + delete this.storageHash[key]; + + // serialize and save the hash table into the + // form + this.saveHashTable(); + }, + + /** Clears out all saved data. */ + /** public */ reset: function() { + this.storageField.value = ""; + this.storageHash = new Object(); + }, + + /** public */ hasKey: function(key) { + this.assertValidKey(key); + + // make sure the hash table has been loaded + // from the form + this.loadHashTable(); + + if (typeof this.storageHash[key] == "undefined") + return false; + else + return true; + }, + + /** Determines whether the key given is valid; + keys can only have letters, numbers, the dash, + underscore, spaces, or one of the + following characters: + !@#$%^&*()+=:;,./?|\~{}[] */ + /** public */ isValidKey: function(key) { + // allow all strings, since we don't use XML serialization + // format anymore + return (typeof key == "string"); + + /* + if (typeof key != "string") + key = key.toString(); + + + var matcher = + /^[a-zA-Z0-9_ \!\@\#\$\%\^\&\*\(\)\+\=\:\;\,\.\/\?\|\\\~\{\}\[\]]*$/; + + return matcher.test(key);*/ + }, + + + + + /** A reference to our textarea field. */ + /** private */ storageField: null, + + /** private */ init: function() { + // write a hidden form into the page + var styleValue = "position: absolute; top: -1000px; left: -1000px;"; + if (this.debugging == true) { + styleValue = "width: 30em; height: 30em;"; + } + + var newContent = + "<form id='historyStorageForm' " + + "method='GET' " + + "style='" + styleValue + "'>" + + "<textarea id='historyStorageField' " + + "style='" + styleValue + "'" + + "left: -1000px;' " + + "name='historyStorageField'></textarea>" + + "</form>"; + document.write(newContent); + + this.storageField = document.getElementById("historyStorageField"); + }, + + /** Asserts that a key is valid, throwing + an exception if it is not. */ + /** private */ assertValidKey: function(key) { + if (this.isValidKey(key) == false) { + throw "Please provide a valid key for " + + "window.historyStorage, key= " + + key; + } + }, + + /** Loads the hash table up from the form. */ + /** private */ loadHashTable: function() { + if (this.hashLoaded == false) { + // get the hash table as a serialized + // string + var serializedHashTable = this.storageField.value; + + if (serializedHashTable != "" && + serializedHashTable != null) { + // destringify the content back into a + // real JavaScript object + this.storageHash = eval('(' + serializedHashTable + ')'); + } + + this.hashLoaded = true; + } + }, + + /** Saves the hash table into the form. */ + /** private */ saveHashTable: function() { + this.loadHashTable(); + + // serialized the hash table + var serializedHashTable = JSON.stringify(this.storageHash); + + // save this value + this.storageField.value = serializedHashTable; + } +}; + + + + + + + + + + +/** The JSON class is copyright 2005 JSON.org. */ +Array.prototype.______array = '______array'; + +var JSON = { + org: 'http://www.JSON.org', + copyright: '(c)2005 JSON.org', + license: 'http://www.crockford.com/JSON/license.html', + + stringify: function (arg) { + var c, i, l, s = '', v; + + switch (typeof arg) { + case 'object': + if (arg) { + if (arg.______array == '______array') { + for (i = 0; i < arg.length; ++i) { + v = this.stringify(arg[i]); + if (s) { + s += ','; + } + s += v; + } + return '[' + s + ']'; + } else if (typeof arg.toString != 'undefined') { + for (i in arg) { + v = arg[i]; + if (typeof v != 'undefined' && typeof v != 'function') { + v = this.stringify(v); + if (s) { + s += ','; + } + s += this.stringify(i) + ':' + v; + } + } + return '{' + s + '}'; + } + } + return 'null'; + case 'number': + return isFinite(arg) ? String(arg) : 'null'; + case 'string': + l = arg.length; + s = '"'; + for (i = 0; i < l; i += 1) { + c = arg.charAt(i); + if (c >= ' ') { + if (c == '\\' || c == '"') { + s += '\\'; + } + s += c; + } else { + switch (c) { + case '\b': + s += '\\b'; + break; + case '\f': + s += '\\f'; + break; + case '\n': + s += '\\n'; + break; + case '\r': + s += '\\r'; + break; + case '\t': + s += '\\t'; + break; + default: + c = c.charCodeAt(); + s += '\\u00' + Math.floor(c / 16).toString(16) + + (c % 16).toString(16); + } + } + } + return s + '"'; + case 'boolean': + return String(arg); + default: + return 'null'; + } + }, + parse: function (text) { + var at = 0; + var ch = ' '; + + function error(m) { + throw { + name: 'JSONError', + message: m, + at: at - 1, + text: text + }; + } + + function next() { + ch = text.charAt(at); + at += 1; + return ch; + } + + function white() { + while (ch != '' && ch <= ' ') { + next(); + } + } + + function str() { + var i, s = '', t, u; + + if (ch == '"') { +outer: while (next()) { + if (ch == '"') { + next(); + return s; + } else if (ch == '\\') { + switch (next()) { + case 'b': + s += '\b'; + break; + case 'f': + s += '\f'; + break; + case 'n': + s += '\n'; + break; + case 'r': + s += '\r'; + break; + case 't': + s += '\t'; + break; + case 'u': + u = 0; + for (i = 0; i < 4; i += 1) { + t = parseInt(next(), 16); + if (!isFinite(t)) { + break outer; + } + u = u * 16 + t; + } + s += String.fromCharCode(u); + break; + default: + s += ch; + } + } else { + s += ch; + } + } + } + error("Bad string"); + } + + function arr() { + var a = []; + + if (ch == '[') { + next(); + white(); + if (ch == ']') { + next(); + return a; + } + while (ch) { + a.push(val()); + white(); + if (ch == ']') { + next(); + return a; + } else if (ch != ',') { + break; + } + next(); + white(); + } + } + error("Bad array"); + } + + function obj() { + var k, o = {}; + + if (ch == '{') { + next(); + white(); + if (ch == '}') { + next(); + return o; + } + while (ch) { + k = str(); + white(); + if (ch != ':') { + break; + } + next(); + o[k] = val(); + white(); + if (ch == '}') { + next(); + return o; + } else if (ch != ',') { + break; + } + next(); + white(); + } + } + error("Bad object"); + } + + function num() { + var n = '', v; + if (ch == '-') { + n = '-'; + next(); + } + while (ch >= '0' && ch <= '9') { + n += ch; + next(); + } + if (ch == '.') { + n += '.'; + while (next() && ch >= '0' && ch <= '9') { + n += ch; + } + } + if (ch == 'e' || ch == 'E') { + n += 'e'; + next(); + if (ch == '-' || ch == '+') { + n += ch; + next(); + } + while (ch >= '0' && ch <= '9') { + n += ch; + next(); + } + } + v = +n; + if (!isFinite(v)) { + error("Bad number"); + } else { + return v; + } + } + + function word() { + switch (ch) { + case 't': + if (next() == 'r' && next() == 'u' && next() == 'e') { + next(); + return true; + } + break; + case 'f': + if (next() == 'a' && next() == 'l' && next() == 's' && + next() == 'e') { + next(); + return false; + } + break; + case 'n': + if (next() == 'u' && next() == 'l' && next() == 'l') { + next(); + return null; + } + break; + } + error("Syntax error"); + } + + function val() { + white(); + switch (ch) { + case '{': + return obj(); + case '[': + return arr(); + case '"': + return str(); + case '-': + return num(); + default: + return ch >= '0' && ch <= '9' ? num() : word(); + } + } + + return val(); + } +}; + + + +/** Initialize all of our objects now. */ +window.historyStorage.init(); +window.dhtmlHistory.create();
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