| /* |
| Copyright (c) 2004-2009, The Dojo Foundation All Rights Reserved. |
| Available via Academic Free License >= 2.1 OR the modified BSD license. |
| see: http://dojotoolkit.org/license for details |
| */ |
| |
| |
| if(!dojo._hasResource["dojo._base.Deferred"]){ |
| dojo._hasResource["dojo._base.Deferred"]=true; |
| dojo.provide("dojo._base.Deferred"); |
| dojo.require("dojo._base.lang"); |
| dojo.Deferred=function(_1){ |
| this.chain=[]; |
| this.id=this._nextId(); |
| this.fired=-1; |
| this.paused=0; |
| this.results=[null,null]; |
| this.canceller=_1; |
| this.silentlyCancelled=false; |
| }; |
| dojo.extend(dojo.Deferred,{_nextId:(function(){ |
| var n=1; |
| return function(){ |
| return n++; |
| }; |
| })(),cancel:function(){ |
| var _3; |
| if(this.fired==-1){ |
| if(this.canceller){ |
| _3=this.canceller(this); |
| }else{ |
| this.silentlyCancelled=true; |
| } |
| if(this.fired==-1){ |
| if(!(_3 instanceof Error)){ |
| var _4=_3; |
| var _5="Deferred Cancelled"; |
| if(_3&&_3.toString){ |
| _5+=": "+_3.toString(); |
| } |
| _3=new Error(_5); |
| _3.dojoType="cancel"; |
| _3.cancelResult=_4; |
| } |
| this.errback(_3); |
| } |
| }else{ |
| if((this.fired==0)&&(this.results[0] instanceof dojo.Deferred)){ |
| this.results[0].cancel(); |
| } |
| } |
| },_resback:function(_6){ |
| this.fired=((_6 instanceof Error)?1:0); |
| this.results[this.fired]=_6; |
| this._fire(); |
| },_check:function(){ |
| if(this.fired!=-1){ |
| if(!this.silentlyCancelled){ |
| throw new Error("already called!"); |
| } |
| this.silentlyCancelled=false; |
| return; |
| } |
| },callback:function(_7){ |
| this._check(); |
| this._resback(_7); |
| },errback:function(_8){ |
| this._check(); |
| if(!(_8 instanceof Error)){ |
| _8=new Error(_8); |
| } |
| this._resback(_8); |
| },addBoth:function(cb,_a){ |
| var _b=dojo.hitch.apply(dojo,arguments); |
| return this.addCallbacks(_b,_b); |
| },addCallback:function(cb,_d){ |
| return this.addCallbacks(dojo.hitch.apply(dojo,arguments)); |
| },addErrback:function(cb,_f){ |
| return this.addCallbacks(null,dojo.hitch.apply(dojo,arguments)); |
| },addCallbacks:function(cb,eb){ |
| this.chain.push([cb,eb]); |
| if(this.fired>=0){ |
| this._fire(); |
| } |
| return this; |
| },_fire:function(){ |
| var _12=this.chain; |
| var _13=this.fired; |
| var res=this.results[_13]; |
| var _15=this; |
| var cb=null; |
| while((_12.length>0)&&(this.paused==0)){ |
| var f=_12.shift()[_13]; |
| if(!f){ |
| continue; |
| } |
| var _18=function(){ |
| var ret=f(res); |
| if(typeof ret!="undefined"){ |
| res=ret; |
| } |
| _13=((res instanceof Error)?1:0); |
| if(res instanceof dojo.Deferred){ |
| cb=function(res){ |
| _15._resback(res); |
| _15.paused--; |
| if((_15.paused==0)&&(_15.fired>=0)){ |
| _15._fire(); |
| } |
| }; |
| this.paused++; |
| } |
| }; |
| if(dojo.config.debugAtAllCosts){ |
| _18.call(this); |
| }else{ |
| try{ |
| _18.call(this); |
| } |
| catch(err){ |
| _13=1; |
| res=err; |
| } |
| } |
| } |
| this.fired=_13; |
| this.results[_13]=res; |
| if((cb)&&(this.paused)){ |
| res.addBoth(cb); |
| } |
| }}); |
| } |
