@l5i/dashjs/build/es5/src/core/EventBus.js

A reference client implementation for the playback of MPEG DASH via Javascript and compliant browsers.

/**
 * The copyright in this software is being made available under the BSD License,
 * included below. This software may be subject to other third party and contributor
 * rights, including patent rights, and no such rights are granted under this license.
 *
 * Copyright (c) 2013, Dash Industry Forum.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *  * Redistributions of source code must retain the above copyright notice, this
 *  list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright notice,
 *  this list of conditions and the following disclaimer in the documentation and/or
 *  other materials provided with the distribution.
 *  * Neither the name of Dash Industry Forum nor the names of its
 *  contributors may be used to endorse or promote products derived from this software
 *  without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS AS IS AND ANY
 *  EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 *  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 *  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 *  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 *  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *  POSSIBILITY OF SUCH DAMAGE.
 */'use strict';Object.defineProperty(exports,'__esModule',{value:true});function _interopRequireDefault(obj){return obj && obj.__esModule?obj:{'default':obj};}var _FactoryMaker=require('./FactoryMaker');var _FactoryMaker2=_interopRequireDefault(_FactoryMaker);var EVENT_PRIORITY_LOW=0;var EVENT_PRIORITY_HIGH=5000;function EventBus(){var handlers={};function on(type,listener,scope){var priority=arguments.length <= 3 || arguments[3] === undefined?EVENT_PRIORITY_LOW:arguments[3];if(!type){throw new Error('event type cannot be null or undefined');}if(!listener || typeof listener !== 'function'){throw new Error('listener must be a function: ' + listener);}if(getHandlerIdx(type,listener,scope) >= 0)return;handlers[type] = handlers[type] || [];var handler={callback:listener,scope:scope,priority:priority};var inserted=handlers[type].some(function(item,idx){if(item && priority > item.priority){handlers[type].splice(idx,0,handler);return true;}});if(!inserted){handlers[type].push(handler);}}function off(type,listener,scope){if(!type || !listener || !handlers[type])return;var idx=getHandlerIdx(type,listener,scope);if(idx < 0)return;handlers[type][idx] = null;}function trigger(type,payload){if(!type || !handlers[type])return;payload = payload || {};if(payload.hasOwnProperty('type'))throw new Error('\'type\' is a reserved word for event dispatching');payload.type = type;handlers[type] = handlers[type].filter(function(item){return item;});handlers[type].forEach(function(handler){return handler && handler.callback.call(handler.scope,payload);});}function getHandlerIdx(type,listener,scope){var idx=-1;if(!handlers[type])return idx;handlers[type].some(function(item,index){if(item && item.callback === listener && (!scope || scope === item.scope)){idx = index;return true;}});return idx;}function reset(){handlers = {};}var instance={on:on,off:off,trigger:trigger,reset:reset};return instance;}EventBus.__dashjs_factory_name = 'EventBus';var factory=_FactoryMaker2['default'].getSingletonFactory(EventBus);factory.EVENT_PRIORITY_LOW = EVENT_PRIORITY_LOW;factory.EVENT_PRIORITY_HIGH = EVENT_PRIORITY_HIGH;_FactoryMaker2['default'].updateSingletonFactory(EventBus.__dashjs_factory_name,factory);exports['default'] = factory;module.exports = exports['default'];
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