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/*Copyright (c) 2004-2006, The Dojo FoundationAll Rights Reserved.Licensed under the Academic Free License version 2.1 or above OR themodified BSD license. For more information on Dojo licensing, see:http://dojotoolkit.org/community/licensing.shtml*/dojo.provide("dojo.io.ScriptSrcIO");dojo.require("dojo.io.BrowserIO");dojo.require("dojo.undo.browser");dojo.io.ScriptSrcTransport = new function () {this.preventCache = false;this.maxUrlLength = 1000;this.inFlightTimer = null;this.DsrStatusCodes = {Continue:100, Ok:200, Error:500};this.startWatchingInFlight = function () {if (!this.inFlightTimer) {this.inFlightTimer = setInterval("dojo.io.ScriptSrcTransport.watchInFlight();", 100);}};this.watchInFlight = function () {var totalCount = 0;var doneCount = 0;for (var param in this._state) {totalCount++;var currentState = this._state[param];if (currentState.isDone) {doneCount++;delete this._state[param];} else {if (!currentState.isFinishing) {var listener = currentState.kwArgs;try {if (currentState.checkString && eval("typeof(" + currentState.checkString + ") != 'undefined'")) {currentState.isFinishing = true;this._finish(currentState, "load");doneCount++;delete this._state[param];} else {if (listener.timeoutSeconds && listener.timeout) {if (currentState.startTime + (listener.timeoutSeconds * 1000) < (new Date()).getTime()) {currentState.isFinishing = true;this._finish(currentState, "timeout");doneCount++;delete this._state[param];}} else {if (!listener.timeoutSeconds) {doneCount++;}}}}catch (e) {currentState.isFinishing = true;this._finish(currentState, "error", {status:this.DsrStatusCodes.Error, response:e});}}}}if (doneCount >= totalCount) {clearInterval(this.inFlightTimer);this.inFlightTimer = null;}};this.canHandle = function (kwArgs) {return dojo.lang.inArray(["text/javascript", "text/json", "application/json"], (kwArgs["mimetype"].toLowerCase())) && (kwArgs["method"].toLowerCase() == "get") && !(kwArgs["formNode"] && dojo.io.formHasFile(kwArgs["formNode"])) && (!kwArgs["sync"] || kwArgs["sync"] == false) && !kwArgs["file"] && !kwArgs["multipart"];};this.removeScripts = function () {var scripts = document.getElementsByTagName("script");for (var i = 0; scripts && i < scripts.length; i++) {var scriptTag = scripts[i];if (scriptTag.className == "ScriptSrcTransport") {var parent = scriptTag.parentNode;parent.removeChild(scriptTag);i--;}}};this.bind = function (kwArgs) {var url = kwArgs.url;var query = "";if (kwArgs["formNode"]) {var ta = kwArgs.formNode.getAttribute("action");if ((ta) && (!kwArgs["url"])) {url = ta;}var tp = kwArgs.formNode.getAttribute("method");if ((tp) && (!kwArgs["method"])) {kwArgs.method = tp;}query += dojo.io.encodeForm(kwArgs.formNode, kwArgs.encoding, kwArgs["formFilter"]);}if (url.indexOf("#") > -1) {dojo.debug("Warning: dojo.io.bind: stripping hash values from url:", url);url = url.split("#")[0];}var urlParts = url.split("?");if (urlParts && urlParts.length == 2) {url = urlParts[0];query += (query ? "&" : "") + urlParts[1];}if (kwArgs["backButton"] || kwArgs["back"] || kwArgs["changeUrl"]) {dojo.undo.browser.addToHistory(kwArgs);}var id = kwArgs["apiId"] ? kwArgs["apiId"] : "id" + this._counter++;var content = kwArgs["content"];var jsonpName = kwArgs.jsonParamName;if (kwArgs.sendTransport || jsonpName) {if (!content) {content = {};}if (kwArgs.sendTransport) {content["dojo.transport"] = "scriptsrc";}if (jsonpName) {content[jsonpName] = "dojo.io.ScriptSrcTransport._state." + id + ".jsonpCall";}}if (kwArgs.postContent) {query = kwArgs.postContent;} else {if (content) {query += ((query) ? "&" : "") + dojo.io.argsFromMap(content, kwArgs.encoding, jsonpName);}}if (kwArgs["apiId"]) {kwArgs["useRequestId"] = true;}var state = {"id":id, "idParam":"_dsrid=" + id, "url":url, "query":query, "kwArgs":kwArgs, "startTime":(new Date()).getTime(), "isFinishing":false};if (!url) {this._finish(state, "error", {status:this.DsrStatusCodes.Error, statusText:"url.none"});return;}if (content && content[jsonpName]) {state.jsonp = content[jsonpName];state.jsonpCall = function (data) {if (data["Error"] || data["error"]) {if (dojo["json"] && dojo["json"]["serialize"]) {dojo.debug(dojo.json.serialize(data));}dojo.io.ScriptSrcTransport._finish(this, "error", data);} else {dojo.io.ScriptSrcTransport._finish(this, "load", data);}};}if (kwArgs["useRequestId"] || kwArgs["checkString"] || state["jsonp"]) {this._state[id] = state;}if (kwArgs["checkString"]) {state.checkString = kwArgs["checkString"];}state.constantParams = (kwArgs["constantParams"] == null ? "" : kwArgs["constantParams"]);if (kwArgs["preventCache"] || (this.preventCache == true && kwArgs["preventCache"] != false)) {state.nocacheParam = "dojo.preventCache=" + new Date().valueOf();} else {state.nocacheParam = "";}var urlLength = state.url.length + state.query.length + state.constantParams.length + state.nocacheParam.length + this._extraPaddingLength;if (kwArgs["useRequestId"]) {urlLength += state.idParam.length;}if (!kwArgs["checkString"] && kwArgs["useRequestId"] && !state["jsonp"] && !kwArgs["forceSingleRequest"] && urlLength > this.maxUrlLength) {if (url > this.maxUrlLength) {this._finish(state, "error", {status:this.DsrStatusCodes.Error, statusText:"url.tooBig"});return;} else {this._multiAttach(state, 1);}} else {var queryParams = [state.constantParams, state.nocacheParam, state.query];if (kwArgs["useRequestId"] && !state["jsonp"]) {queryParams.unshift(state.idParam);}var finalUrl = this._buildUrl(state.url, queryParams);state.finalUrl = finalUrl;this._attach(state.id, finalUrl);}this.startWatchingInFlight();};this._counter = 1;this._state = {};this._extraPaddingLength = 16;this._buildUrl = function (url, nameValueArray) {var finalUrl = url;var joiner = "?";for (var i = 0; i < nameValueArray.length; i++) {if (nameValueArray[i]) {finalUrl += joiner + nameValueArray[i];joiner = "&";}}return finalUrl;};this._attach = function (id, url) {var element = document.createElement("script");element.type = "text/javascript";element.src = url;element.id = id;element.className = "ScriptSrcTransport";document.getElementsByTagName("head")[0].appendChild(element);};this._multiAttach = function (state, part) {if (state.query == null) {this._finish(state, "error", {status:this.DsrStatusCodes.Error, statusText:"query.null"});return;}if (!state.constantParams) {state.constantParams = "";}var queryMax = this.maxUrlLength - state.idParam.length - state.constantParams.length - state.url.length - state.nocacheParam.length - this._extraPaddingLength;var isDone = state.query.length < queryMax;var currentQuery;if (isDone) {currentQuery = state.query;state.query = null;} else {var ampEnd = state.query.lastIndexOf("&", queryMax - 1);var eqEnd = state.query.lastIndexOf("=", queryMax - 1);if (ampEnd > eqEnd || eqEnd == queryMax - 1) {currentQuery = state.query.substring(0, ampEnd);state.query = state.query.substring(ampEnd + 1, state.query.length);} else {currentQuery = state.query.substring(0, queryMax);var queryName = currentQuery.substring((ampEnd == -1 ? 0 : ampEnd + 1), eqEnd);state.query = queryName + "=" + state.query.substring(queryMax, state.query.length);}}var queryParams = [currentQuery, state.idParam, state.constantParams, state.nocacheParam];if (!isDone) {queryParams.push("_part=" + part);}var url = this._buildUrl(state.url, queryParams);this._attach(state.id + "_" + part, url);};this._finish = function (state, callback, event) {if (callback != "partOk" && !state.kwArgs[callback] && !state.kwArgs["handle"]) {if (callback == "error") {state.isDone = true;throw event;}} else {switch (callback) {case "load":var response = event ? event.response : null;if (!response) {response = event;}state.kwArgs[(typeof state.kwArgs.load == "function") ? "load" : "handle"]("load", response, event, state.kwArgs);state.isDone = true;break;case "partOk":var part = parseInt(event.response.part, 10) + 1;if (event.response.constantParams) {state.constantParams = event.response.constantParams;}this._multiAttach(state, part);state.isDone = false;break;case "error":state.kwArgs[(typeof state.kwArgs.error == "function") ? "error" : "handle"]("error", event.response, event, state.kwArgs);state.isDone = true;break;default:state.kwArgs[(typeof state.kwArgs[callback] == "function") ? callback : "handle"](callback, event, event, state.kwArgs);state.isDone = true;}}};dojo.io.transports.addTransport("ScriptSrcTransport");};window.onscriptload = function (event) {var state = null;var transport = dojo.io.ScriptSrcTransport;if (transport._state[event.id]) {state = transport._state[event.id];} else {var tempState;for (var param in transport._state) {tempState = transport._state[param];if (tempState.finalUrl && tempState.finalUrl == event.id) {state = tempState;break;}}if (state == null) {var scripts = document.getElementsByTagName("script");for (var i = 0; scripts && i < scripts.length; i++) {var scriptTag = scripts[i];if (scriptTag.getAttribute("class") == "ScriptSrcTransport" && scriptTag.src == event.id) {state = transport._state[scriptTag.id];break;}}}if (state == null) {throw "No matching state for onscriptload event.id: " + event.id;}}var callbackName = "error";switch (event.status) {case dojo.io.ScriptSrcTransport.DsrStatusCodes.Continue:callbackName = "partOk";break;case dojo.io.ScriptSrcTransport.DsrStatusCodes.Ok:callbackName = "load";break;}transport._finish(state, callbackName, event);};