dashjs
Version:
A reference client implementation for the playback of MPEG DASH via Javascript and compliant browsers.
32 lines (31 loc) • 4.02 kB
JavaScript
;Object.defineProperty(exports,"__esModule",{value:true});var _FactoryMaker=require('./FactoryMaker');var _FactoryMaker2=_interopRequireDefault(_FactoryMaker);function _interopRequireDefault(obj){return obj&&obj.__esModule?obj:{default:obj};}var EVENT_PRIORITY_LOW=0;/**
* 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.
*/var EVENT_PRIORITY_HIGH=5000;function EventBus(){var handlers={};function on(type,listener,scope){var priority=arguments.length>3&&arguments[3]!==undefined?arguments[3]:EVENT_PRIORITY_LOW;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;
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