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/*! elementor - v0.7.1 - 18-08-2016 */ // Backbone.Radio v1.0.4 (function (global, factory) { typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(require('underscore'), require('backbone')) : typeof define === 'function' && define.amd ? define(['underscore', 'backbone'], factory) : (global.Backbone = global.Backbone || {}, global.Backbone.Radio = factory(global._,global.Backbone)); }(this, function (_,Backbone) { 'use strict'; _ = 'default' in _ ? _['default'] : _; Backbone = 'default' in Backbone ? Backbone['default'] : Backbone; var babelHelpers = {}; babelHelpers.typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; }; babelHelpers; var previousRadio = Backbone.Radio; var Radio = Backbone.Radio = {}; Radio.VERSION = '1.0.4'; // This allows you to run multiple instances of Radio on the same // webapp. After loading the new version, call `noConflict()` to // get a reference to it. At the same time the old version will be // returned to Backbone.Radio. Radio.noConflict = function () { Backbone.Radio = previousRadio; return this; }; // Whether or not we're in DEBUG mode or not. DEBUG mode helps you // get around the issues of lack of warnings when events are mis-typed. Radio.DEBUG = false; // Format debug text. Radio._debugText = function (warning, eventName, channelName) { return warning + (channelName ? ' on the ' + channelName + ' channel' : '') + ': "' + eventName + '"'; }; // This is the method that's called when an unregistered event was called. // By default, it logs warning to the console. By overriding this you could // make it throw an Error, for instance. This would make firing a nonexistent event // have the same consequence as firing a nonexistent method on an Object. Radio.debugLog = function (warning, eventName, channelName) { if (Radio.DEBUG && console && console.warn) { console.warn(Radio._debugText(warning, eventName, channelName)); } }; var eventSplitter = /\s+/; // An internal method used to handle Radio's method overloading for Requests. // It's borrowed from Backbone.Events. It differs from Backbone's overload // API (which is used in Backbone.Events) in that it doesn't support space-separated // event names. Radio._eventsApi = function (obj, action, name, rest) { if (!name) { return false; } var results = {}; // Handle event maps. if ((typeof name === 'undefined' ? 'undefined' : babelHelpers.typeof(name)) === 'object') { for (var key in name) { var result = obj[action].apply(obj, [key, name[key]].concat(rest)); eventSplitter.test(key) ? _.extend(results, result) : results[key] = result; } return results; } // Handle space separated event names. if (eventSplitter.test(name)) { var names = name.split(eventSplitter); for (var i = 0, l = names.length; i < l; i++) { results[names[i]] = obj[action].apply(obj, [names[i]].concat(rest)); } return results; } return false; }; // An optimized way to execute callbacks. Radio._callHandler = function (callback, context, args) { var a1 = args[0], a2 = args[1], a3 = args[2]; switch (args.length) { case 0: return callback.call(context); case 1: return callback.call(context, a1); case 2: return callback.call(context, a1, a2); case 3: return callback.call(context, a1, a2, a3); default: return callback.apply(context, args); } }; // A helper used by `off` methods to the handler from the store function removeHandler(store, name, callback, context) { var event = store[name]; if ((!callback || callback === event.callback || callback === event.callback._callback) && (!context || context === event.context)) { delete store[name]; return true; } } function removeHandlers(store, name, callback, context) { store || (store = {}); var names = name ? [name] : _.keys(store); var matched = false; for (var i = 0, length = names.length; i < length; i++) { name = names[i]; // If there's no event by this name, log it and continue // with the loop if (!store[name]) { continue; } if (removeHandler(store, name, callback, context)) { matched = true; } } return matched; } /* * tune-in * ------- * Get console logs of a channel's activity * */ var _logs = {}; // This is to produce an identical function in both tuneIn and tuneOut, // so that Backbone.Events unregisters it. function _partial(channelName) { return _logs[channelName] || (_logs[channelName] = _.partial(Radio.log, channelName)); } _.extend(Radio, { // Log information about the channel and event log: function log(channelName, eventName) { if (typeof console === 'undefined') { return; } var args = _.drop(arguments, 2); console.log('[' + channelName + '] "' + eventName + '"', args); }, // Logs all events on this channel to the console. It sets an // internal value on the channel telling it we're listening, // then sets a listener on the Backbone.Events tuneIn: function tuneIn(channelName) { var channel = Radio.channel(channelName); channel._tunedIn = true; channel.on('all', _partial(channelName)); return this; }, // Stop logging all of the activities on this channel to the console tuneOut: function tuneOut(channelName) { var channel = Radio.channel(channelName); channel._tunedIn = false; channel.off('all', _partial(channelName)); delete _logs[channelName]; return this; } }); /* * Backbone.Radio.Requests * ----------------------- * A messaging system for requesting data. * */ function makeCallback(callback) { return _.isFunction(callback) ? callback : function () { return callback; }; } Radio.Requests = { // Make a request request: function request(name) { var args = _.rest(arguments); var results = Radio._eventsApi(this, 'request', name, args); if (results) { return results; } var channelName = this.channelName; var requests = this._requests; // Check if we should log the request, and if so, do it if (channelName && this._tunedIn) { Radio.log.apply(this, [channelName, name].concat(args)); } // If the request isn't handled, log it in DEBUG mode and exit if (requests && (requests[name] || requests['default'])) { var handler = requests[name] || requests['default']; args = requests[name] ? args : arguments; return Radio._callHandler(handler.callback, handler.context, args); } else { Radio.debugLog('An unhandled request was fired', name, channelName); } }, // Set up a handler for a request reply: function reply(name, callback, context) { if (Radio._eventsApi(this, 'reply', name, [callback, context])) { return this; } this._requests || (this._requests = {}); if (this._requests[name]) { Radio.debugLog('A request was overwritten', name, this.channelName); } this._requests[name] = { callback: makeCallback(callback), context: context || this }; return this; }, // Set up a handler that can only be requested once replyOnce: function replyOnce(name, callback, context) { if (Radio._eventsApi(this, 'replyOnce', name, [callback, context])) { return this; } var self = this; var once = _.once(function () { self.stopReplying(name); return makeCallback(callback).apply(this, arguments); }); return this.reply(name, once, context); }, // Remove handler(s) stopReplying: function stopReplying(name, callback, context) { if (Radio._eventsApi(this, 'stopReplying', name)) { return this; } // Remove everything if there are no arguments passed if (!name && !callback && !context) { delete this._requests; } else if (!removeHandlers(this._requests, name, callback, context)) { Radio.debugLog('Attempted to remove the unregistered request', name, this.channelName); } return this; } }; /* * Backbone.Radio.channel * ---------------------- * Get a reference to a channel by name. * */ Radio._channels = {}; Radio.channel = function (channelName) { if (!channelName) { throw new Error('You must provide a name for the channel.'); } if (Radio._channels[channelName]) { return Radio._channels[channelName]; } else { return Radio._channels[channelName] = new Radio.Channel(channelName); } }; /* * Backbone.Radio.Channel * ---------------------- * A Channel is an object that extends from Backbone.Events, * and Radio.Requests. * */ Radio.Channel = function (channelName) { this.channelName = channelName; }; _.extend(Radio.Channel.prototype, Backbone.Events, Radio.Requests, { // Remove all handlers from the messaging systems of this channel reset: function reset() { this.off(); this.stopListening(); this.stopReplying(); return this; } }); /* * Top-level API * ------------- * Supplies the 'top-level API' for working with Channels directly * from Backbone.Radio. * */ var channel; var args; var systems = [Backbone.Events, Radio.Requests]; _.each(systems, function (system) { _.each(system, function (method, methodName) { Radio[methodName] = function (channelName) { args = _.rest(arguments); channel = this.channel(channelName); return channel[methodName].apply(channel, args); }; }); }); Radio.reset = function (channelName) { var channels = !channelName ? this._channels : [this._channels[channelName]]; _.invoke(channels, 'reset'); }; return Radio; }));
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