lib/dojo/_base/Deferred.js

   1 /*
   2         Copyright (c) 2004-2010, The Dojo Foundation All Rights Reserved.
   3         Available via Academic Free License >= 2.1 OR the modified BSD license.
   4         see: http://dojotoolkit.org/license for details
   5 */
   6
   7
   8 if(!dojo._hasResource["dojo._base.Deferred"]){
   9 dojo._hasResource["dojo._base.Deferred"]=true;
  10 dojo.provide("dojo._base.Deferred");
  11 dojo.require("dojo._base.lang");
  12 (function(){
  13 var _1=function(){
  14 };
  15 var _2=Object.freeze||function(){
  16 };
  17 dojo.Deferred=function(_3){
  18 var _4,_5,_6,_7,_8;
  19 var _9=this.promise={};
  20 function _a(_b){
  21 if(_5){
  22 throw new Error("This deferred has already been resolved");
  23 }
  24 _4=_b;
  25 _5=true;
  26 _c();
  27 };
  28 function _c(){
  29 var _d;
  30 while(!_d&&_8){
  31 var _e=_8;
  32 _8=_8.next;
  33 if(_d=(_e.progress==_1)){
  34 _5=false;
  35 }
  36 var _f=(_6?_e.error:_e.resolved);
  37 if(_f){
  38 try{
  39 var _10=_f(_4);
  40 if(_10&&typeof _10.then==="function"){
  41 _10.then(dojo.hitch(_e.deferred,"resolve"),dojo.hitch(_e.deferred,"reject"));
  42 continue;
  43 }
  44 var _11=_d&&_10===undefined;
  45 _e.deferred[_11&&_6?"reject":"resolve"](_11?_4:_10);
  46 }
  47 catch(e){
  48 _e.deferred.reject(e);
  49 }
  50 }else{
  51 if(_6){
  52 _e.deferred.reject(_4);
  53 }else{
  54 _e.deferred.resolve(_4);
  55 }
  56 }
  57 }
  58 };
  59 this.resolve=this.callback=function(_12){
  60 this.fired=0;
  61 this.results=[_12,null];
  62 _a(_12);
  63 };
  64 this.reject=this.errback=function(_13){
  65 _6=true;
  66 this.fired=1;
  67 _a(_13);
  68 this.results=[null,_13];
  69 if(!_13||_13.log!==false){
  70 (dojo.config.deferredOnError||function(x){
  71 console.error(x);
  72 })(_13);
  73 }
  74 };
  75 this.progress=function(_14){
  76 var _15=_8;
  77 while(_15){
  78 var _16=_15.progress;
  79 _16&&_16(_14);
  80 _15=_15.next;
  81 }
  82 };
  83 this.addCallbacks=function(_17,_18){
  84 this.then(_17,_18,_1);
  85 return this;
  86 };
  87 this.then=_9.then=function(_19,_1a,_1b){
  88 var _1c=_1b==_1?this:new dojo.Deferred(_9.cancel);
  89 var _1d={resolved:_19,error:_1a,progress:_1b,deferred:_1c};
  90 if(_8){
  91 _7=_7.next=_1d;
  92 }else{
  93 _8=_7=_1d;
  94 }
  95 if(_5){
  96 _c();
  97 }
  98 return _1c.promise;
  99 };
 100 var _1e=this;
 101 this.cancel=_9.cancel=function(){
 102 if(!_5){
 103 var _1f=_3&&_3(_1e);
 104 if(!_5){
 105 if(!(_1f instanceof Error)){
 106 _1f=new Error(_1f);
 107 }
 108 _1f.log=false;
 109 _1e.reject(_1f);
 110 }
 111 }
 112 };
 113 _2(_9);
 114 };
 115 dojo.extend(dojo.Deferred,{addCallback:function(_20){
 116 return this.addCallbacks(dojo.hitch.apply(dojo,arguments));
 117 },addErrback:function(_21){
 118 return this.addCallbacks(null,dojo.hitch.apply(dojo,arguments));
 119 },addBoth:function(_22){
 120 var _23=dojo.hitch.apply(dojo,arguments);
 121 return this.addCallbacks(_23,_23);
 122 },fired:-1});
 123 })();
 124 dojo.when=function(_24,_25,_26,_27){
 125 if(_24&&typeof _24.then==="function"){
 126 return _24.then(_25,_26,_27);
 127 }
 128 return _25(_24);
 129 };
 130 }