91 lines
2.7 KiB
JavaScript
91 lines
2.7 KiB
JavaScript
/*
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*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. 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,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*
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*/
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var config;
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function Config(xhr) {
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function loadPreferences(xhr) {
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var parser = new DOMParser();
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var doc = parser.parseFromString(xhr.responseText, "application/xml");
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var preferences = doc.getElementsByTagName("preference");
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return Array.prototype.slice.call(preferences);
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}
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this.xhr = xhr;
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this.preferences = loadPreferences(this.xhr);
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}
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function readConfig(success, error) {
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var xhr;
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if(typeof config != 'undefined') {
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success(config);
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}
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function fail(msg) {
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console.error(msg);
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if(error) {
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error(msg);
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}
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}
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var xhrStatusChangeHandler = function() {
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if (xhr.readyState == 4) {
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if (xhr.status == 200 || xhr.status == 304 || xhr.status === 0 /* file:// */) {
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config = new Config(xhr);
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success(config);
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}
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else {
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fail('[Browser][cordova.js][xhrStatusChangeHandler] Could not XHR config.xml: ' + xhr.statusText);
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}
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}
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};
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xhr = new XMLHttpRequest();
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xhr.addEventListener("load", xhrStatusChangeHandler);
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try {
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xhr.open("get", "config.xml", true);
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xhr.send();
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} catch(e) {
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fail('[Browser][cordova.js][readConfig] Could not XHR config.xml: ' + JSON.stringify(e));
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}
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}
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/**
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* Reads a preference value from config.xml.
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* Returns preference value or undefined if it does not exist.
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* @param {String} preferenceName Preference name to read */
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Config.prototype.getPreferenceValue = function getPreferenceValue(preferenceName) {
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var preferenceItem = this.preferences && this.preferences.filter(function(item) {
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return item.attributes.name && item.attributes.name.value === preferenceName;
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});
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if(preferenceItem && preferenceItem[0] && preferenceItem[0].attributes && preferenceItem[0].attributes.value) {
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return preferenceItem[0].attributes.value.value;
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}
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};
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exports.readConfig = readConfig;
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