/* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// User service
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flowableModule.service('ResourceService', ['$http', '$q', 'appResourceRoot',
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function ($http, $q, appResourceRoot) {
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var loadedResources = {};
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function loadStylesheet(relativeUrl, cache)
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{
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var url = appResourceRoot + relativeUrl;
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if (!cache || !loadedResources[url])
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{
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if (cache) {
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loadedResources[url] = true;
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}
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if (document.createStyleSheet)
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{
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try
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{
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document.createStyleSheet();
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} catch (e) { }
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}
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else {
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var link = document.createElement("link");
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link.rel = "stylesheet";
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link.type = "text/css";
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link.media = "all";
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link.href = url;
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document.getElementsByTagName("head")[0].appendChild(link);
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}
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}
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}
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function loadScript(relativeUrl, callback, cache)
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{
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var url = appResourceRoot + relativeUrl;
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if (cache && loadedResources[url] && callback)
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{
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callback();
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}
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else
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{
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if (cache) {
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loadedResources[url] = true;
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}
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// Insert the node so it gets loaded
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var script = document.createElement("script");
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script.type="text/javascript";
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script.src = url;
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if (callback) {
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var done = false;
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// Attach handlers for all browsers
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script.onload = script.onreadystatechange = function()
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{
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if (!done && (!this.readyState || this.readyState == "loaded" || this.readyState == "complete"))
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{
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done = true;
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callback();
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}
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};
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}
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var el = document.getElementsByTagName("head")[0];
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el.appendChild(script);
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}
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}
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function loadScripts(relativeUrls, callback, cache)
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{
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function loadNext()
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{
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var relativeUrl = relativeUrls.shift();
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if (relativeUrl)
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{
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loadScript.call(this, relativeUrl, loadNext.bind(this), cache);
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}
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else
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{
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if (callback)
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{
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callback();
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}
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}
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}
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loadNext.call(this);
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}
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function loadFromHtml(url, callback, cache)
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{
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$http.get(url).success(function(responseText)
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{
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var xmlDoc;
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if (window.DOMParser)
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{
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var parser = new DOMParser();
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xmlDoc = parser.parseFromString(responseText, "text/xml");
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}
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else // Internet Explorer
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{
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xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
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xmlDoc.async = false;
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xmlDoc.loadXML(responseText);
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}
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var resources = xmlDoc.getElementsByTagName("link");
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var resourceUrl;
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var resourceUrls = [];
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for (var i = 0, il = resources.length; i < il; i++)
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{
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resourceUrl = resources[i].getAttribute("href");
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if (resourceUrl)
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{
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loadStylesheet(resourceUrl, cache);
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}
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}
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resources = xmlDoc.getElementsByTagName("script");
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for (i = 0, il = resources.length; i < il; i++)
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{
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resourceUrl = resources[i].getAttribute("src");
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if (resourceUrl)
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{
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resourceUrls.push(resourceUrl);
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}
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}
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loadScripts(resourceUrls, callback, cache);
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});
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}
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this.loadFromHtml = loadFromHtml;
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this.loadScript = loadScript;
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this.loadStylesheet = loadStylesheet;
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}]);
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