b38dea0597
Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.
19 lines
No EOL
3.5 KiB
JavaScript
19 lines
No EOL
3.5 KiB
JavaScript
;'use strict';var PlaybackQueue=(function(){var SETTINGS_OPTION_KEY='settings_option_key';var Repeat={OFF:0,LIST:1,SONG:2,next:function(val){return(val+1)%3;}};function posmod(a,b){var r=a%b;return r<0?r+b:r;}
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function fillIndices(length){var indices=new Array(length);for(var i=0;i<length;i++){indices[i]=i;}
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return indices;}
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function shuffle(list){for(var i=list.length-1;i>=1;i--){var j=Math.floor(Math.random()*(i+1));if(j<i){var tmp=list[j];list[j]=list[i];list[i]=tmp;}}}
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function BaseQueue(){this._index=null;}
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BaseQueue.prototype={_init:function(index){if(this.length===0){throw Error('cannot have an empty queue');}
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this._index=index||0;this._shuffle(playbackSettings.shuffle,index!==undefined);},_shuffle:function(enabled,keepIndex=true){this._shuffleTime=Date.now();if(!enabled){if(keepIndex){this._index=this.index;}
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delete this._shuffledList;return;}
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this._shuffledList=fillIndices(this.length);var oldIndex=null;if(keepIndex){oldIndex=this._shuffledList.splice(this._index,1)[0];this._index=0;}
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shuffle(this._shuffledList);if(keepIndex){this._shuffledList.unshift(oldIndex);}},next:function(automatic=false){return this.advance(1,automatic);},previous:function(){this.advance(-1);},advance:function(offset,automatic=false){var next;var justShuffled=false;if(this._shuffleTime<shuffleTime){this._shuffle(playbackSettings.shuffle);justShuffled=true;}
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switch(PlaybackQueue.repeat){case Repeat.OFF:next=Math.max(this._index+offset,0);break;case Repeat.LIST:next=posmod(this._index+offset,this.length);var cycled=next!==this._index+offset;if(playbackSettings.shuffle&&cycled&&!justShuffled){this._shuffle(true);}
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break;case Repeat.SONG:next=automatic?this._index:Math.max(this._index+offset,0);break;default:throw new Error('unexpected repeat status: '+this.repeat);}
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if(next>=this.length){this._index=null;return false;}
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this._index=next;return true;},get index(){return this._shuffledList?this._shuffledList[this._index]:this._index;},get rawIndex(){return this._index;}};function StaticQueue(fileinfos,index){this._fileinfos=fileinfos;this._init(index);}
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StaticQueue.prototype=new BaseQueue();Object.defineProperty(StaticQueue.prototype,'length',{get:function(){return this._fileinfos.length;}});StaticQueue.prototype.current=function(){return Promise.resolve(this._fileinfos[this.index]);};function DynamicQueue(query,index){this._query=query;this._init(index);}
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DynamicQueue.prototype=new BaseQueue();Object.defineProperty(DynamicQueue.prototype,'length',{get:function(){return this._query.count;}});DynamicQueue.prototype.current=function(){var query=this._query;return new Promise((resolve,reject)=>{var handle=Database.advancedEnumerate(query.key,query.range,query.direction,this.index,(record)=>{Database.cancelEnumeration(handle);resolve(record);});});};var playbackSettings=null;var shuffleTime=0;function loadSettings(){return new Promise((resolve,reject)=>{asyncStorage.getItem(SETTINGS_OPTION_KEY,(settings)=>{if(settings){playbackSettings=settings;}else{playbackSettings={repeat:Repeat.OFF,shuffle:false};}
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resolve();});});}
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function saveSettings(){return new Promise((resolve,reject)=>{asyncStorage.setItem(SETTINGS_OPTION_KEY,playbackSettings,()=>{resolve();});});}
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return{StaticQueue:StaticQueue,DynamicQueue:DynamicQueue,Repeat:Repeat,loadSettings:loadSettings,get repeat(){return playbackSettings.repeat;},set repeat(val){playbackSettings.repeat=val;saveSettings();return val;},get shuffle(){return playbackSettings.shuffle;},set shuffle(val){playbackSettings.shuffle=val;shuffleTime=Date.now();saveSettings();return val;},};})(); |