| /* |
| * 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. |
| */ |
| ;(function(history) { |
| /** |
| * A parameter store that stores the values of exposed parameters in the URL via History.js |
| * to maintain the application's state. This uses the HTML5 History API for newer browsers, and |
| * falls back to using the hash in older browsers. Don't forget to add the following (or similar) |
| * inside your <tt>head</tt> tag: |
| * |
| * <pre> |
| * <script src="history.js/scripts/bundled/html4+html5/jquery.history.js"></script> |
| * </pre> |
| * |
| * Configure the manager with: |
| * |
| * <pre> |
| * Manager.setStore(new AjaxSolr.ParameterHistoryStore()); |
| * </pre> |
| * |
| * @class ParameterHistoryStore |
| * @augments AjaxSolr.ParameterStore |
| * @see https://github.com/browserstate/history.js |
| * @see http://www.whatwg.org/specs/web-apps/current-work/multipage/history.html |
| */ |
| AjaxSolr.ParameterHistoryStore = AjaxSolr.ParameterStore.extend( |
| /** @lends AjaxSolr.ParameterHistoryStore.prototype */ |
| { |
| init: function () { |
| if (this.exposed.length) { |
| if (!history) { |
| throw 'ParameterHistoryStore requires History.js'; |
| } |
| |
| history.Adapter.bind(window, 'statechange', this.stateChangeFunction(this)); |
| } |
| }, |
| |
| /** |
| * Stores the values of the exposed parameters in both the local hash and History.js |
| * No other code should be made to change these two values. |
| */ |
| save: function () { |
| this.hash = this.exposedString(); |
| history.pushState({ params: this.hash }, null, '?' + this.hash); |
| }, |
| |
| /** |
| * @see ParameterStore#storedString() |
| */ |
| storedString: function () { |
| var state = history.getState(); |
| |
| // Load the state from the History object. |
| if (state.data && state.data.params) { |
| return state.data.params; |
| } |
| |
| // If initial load, load the state from the URL. |
| var url = state.cleanUrl, index = url.indexOf('?'); |
| if (index == -1) { |
| return ''; |
| } |
| else { |
| return url.substr(index + 1); |
| } |
| }, |
| |
| /** |
| * Called when History.js detects a state change. Checks if state is different to previous state, |
| * and if so, sends a request to Solr. This needs to check if the state has changed since it also |
| * gets called when we call pushState above. |
| */ |
| stateChangeFunction: function (self) { |
| return function () { |
| var hash = self.storedString(); |
| |
| if (self.hash != hash) { |
| self.load(); |
| self.manager.doRequest(); |
| } |
| } |
| } |
| }); |
| })(window.History); |