Просмотр архива SilverStripe


<?php

/**
 * History.js Native Adapter
 * @author Benjamin Arthur Lupton <contact@balupton.com>
 * @copyright 2010-2011 Benjamin Arthur Lupton <contact@balupton.com>
 * @license New BSD License <http://creativecommons.org/licenses/BSD/>
 */

// Closure
(function(window,undefined){
    "use strict";

    // Localise Globals
    var History = window.History = window.History||{};

    // Check Existence
    if ( typeof History.Adapter !== 'undefined' ) {
        throw new Error('History.js Adapter has already been loaded...');
    }

    // Add the Adapter
    History.Adapter = {
        /**
         * History.Adapter.handlers[uid][eventName] = Array
         */
        handlers: {},

        /**
         * History.Adapter._uid
         * The current element unique identifier
         */
        _uid: 1,

        /**
         * History.Adapter.uid(element)
         * @param {Element} element
         * @return {String} uid
         */
        uid: function(element){
            return element._uid || (element._uid = History.Adapter._uid++);
        },

        /**
         * History.Adapter.bind(el,event,callback)
         * @param {Element} element
         * @param {String} eventName - custom and standard events
         * @param {Function} callback
         * @return
         */
        bind: function(element,eventName,callback){
            // Prepare
            var uid = History.Adapter.uid(element);

            // Apply Listener
            History.Adapter.handlers[uid] = History.Adapter.handlers[uid] || {};
            History.Adapter.handlers[uid][eventName] = History.Adapter.handlers[uid][eventName] || [];
            History.Adapter.handlers[uid][eventName].push(callback);

            // Bind Global Listener
            element['on'+eventName] = (function(element,eventName){
                return function(event){
                    History.Adapter.trigger(element,eventName,event);
                };
            })(element,eventName);
        },

        /**
         * History.Adapter.trigger(el,event)
         * @param {Element} element
         * @param {String} eventName - custom and standard events
         * @param {Object} event - a object of event data
         * @return
         */
        trigger: function(element,eventName,event){
            // Prepare
            event = event || {};
            var uid = History.Adapter.uid(element),
                i,n;

            // Apply Listener
            History.Adapter.handlers[uid] = History.Adapter.handlers[uid] || {};
            History.Adapter.handlers[uid][eventName] = History.Adapter.handlers[uid][eventName] || [];

            // Fire Listeners
            for ( i=0,n=History.Adapter.handlers[uid][eventName].length; i<n; ++i ) {
                History.Adapter.handlers[uid][eventName][i].apply(this,[event]);
            }
        },

        /**
         * History.Adapter.extractEventData(key,event,extra)
         * @param {String} key - key for the event data to extract
         * @param {String} event - custom and standard events
         * @return {mixed}
         */
        extractEventData: function(key,event){
            var result = (event && event[key]) || undefined;
            return result;
        },

        /**
         * History.Adapter.onDomLoad(callback)
         * @param {Function} callback
         * @return
         */
        onDomLoad: function(callback) {
            var timeout = window.setTimeout(function(){
                callback();
            },2000);
            window.onload = function(){
                clearTimeout(timeout);
                callback();
            };
        }
    };

    // Try to Initialise History
    if ( typeof History.init !== 'undefined' ) {
        History.init();
    }

})(window);

?>