as3.0正则处理lrc

 

1. package{  
2.     import flash.display.*;  
3.     import flash.events.*;  
4.     import flash.net.*;  
5.     import flash.utils.*;  
6.       
7.     import SingleLineLyrics;  
8.       
9.     public class LyricsFormat /*extends EventDispatcher*/*/{  
10.           
11.         private var path:String;  
12.         private var AllLineLyrics:Array;  
13.           
14.         //歌曲信息;  
15.         public var title:String;  
16.         public var autor:String;  
17.         public var album:String;  
18.         public var by:String;  
19.           
20.         //事件类,我就不写了,  
21.         public var onComplete:Function;  
22.           
23.           
24.         /*
            *接收一个路径上的lrc;
            */ 
25.         public function LyricsFormat(path:String){  
26.             if(path==null){  
27.                 throw new Error("必须要有至少一个参数");  
28.             }  
29.             AllLineLyrics=new Array();  
30.               
31.             var loader:URLLoader=new URLLoader();  
32.             loader.dataFormat=URLLoaderDataFormat.TEXT;  
33.             loader.addEventListener(Event.COMPLETE,completeHander);  
34.               
35.             var request:URLRequest=new URLRequest();  
36.             request.url=path;  
37.             loader.load(request);  
38.         }  
39.           
40.         /*
            *加载完成;
            */ 
41.         function completeHander(event:Event):void{  
42.       
43.             var loader:URLLoader=URLLoader(event.target);  
44.             bulid(loader.data)  
45.             loader.removeEventListener(Event.COMPLETE,completeHander);  
46.               
47.         }  
48.           
49.         /*
            *开始进行比对.存储;
            */ 
50.         function bulid(data:String){  
51.       
52.             title=this.selectSingle(/\[ti:(.+)\]/i,data,"标题:");  
53.             autor=this.selectSingle(/\[ar:(.+)\]/i,data,"歌手:");  
54.             album=this.selectSingle(/\[al:(.+)\]/i,data,"专辑:");  
55.             by=this.selectSingle(/\[by:(.+)\]/i,data,"制作:");  
56.               
57.             trace([title,autor,album,by]);  
58.       
59.  
60.             var RE:RegExp=/\n\[\d+:.+\][^\[\r\n]*/img;  
61.             var Lyrics:Array=data.match(RE);  
62.                           
63.             for each(var i:String in Lyrics){  
64.                 var singleLineTime:String=this.selectSingle(/\[(.+)\].*/,i);  
65.                 var singleLineTimeArray:Array=singleLineTime.split("][");  
66.                 var singleLineText:String=this.selectSingle(/.+\](.*)/,i);  
67.           
68.                 for each(singleLineTime in singleLineTimeArray){  
69.                       
70.                     var LineTimeArray:Array=singleLineTime.split(":");  
71.                       
72.                     var lineTime:Number=Number(LineTimeArray[0])*60*1000+Number(LineTimeArray[1])*1000;  
73.                       
74.                     AllLineLyrics.push(new SingleLineLyrics(lineTime,singleLineText));  
75.                       
76.                 }  
77.                   
78.             }  
79.             AllLineLyrics.sort(this.Equals);  
80.               
81.             //触发;  
82.             this.onComplete();  
83.         }  
84.           
85.         /*
            *进行排序比较;
            */ 
86.         public function Equals(a,b){  
87.             return SingleLineLyrics(a).Equals(b);  
88.         }  
89.           
90.         /*
            *返回所需数组;
            */ 
91.         public function toArray():Array{  
92.               
93.             return this.AllLineLyrics;  
94.         }  
95.           
96.         /*
            *用正则选择单个所需内容;
            */ 
97.         function selectSingle(RE:RegExp,data:String,typeS:String=""):String{  
98.             if(RE.test(data)){  
99.                 return typeS+""+RE.exec(data)[1];  
100.             }  
101.             //没有记录此项;  
102.             return " ";  
103.         }  
104.           
105.     }  
106. }