[tt-rss.git] / lib / dojo / _base / Deferred.js

/*
        Copyright (c) 2004-2011, 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
*/

//>>built
define("dojo/_base/Deferred",["./kernel","./lang"],function(_1,_2){var _3=function(){};var _4=Object.freeze||function(){};_1.Deferred=function(_5){var _6,_7,_8,_9,_a;var _b=(this.promise={});function _c(_d){if(_7){throw new Error("This deferred has already been resolved");}_6=_d;_7=true;_e();};function _e(){var _f;while(!_f&&_a){var _10=_a;_a=_a.next;if((_f=(_10.progress==_3))){_7=false;}var _11=(_8?_10.error:_10.resolved);if(_11){try{var _12=_11(_6);if(_12&&typeof _12.then==="function"){_12.then(_2.hitch(_10.deferred,"resolve"),_2.hitch(_10.deferred,"reject"),_2.hitch(_10.deferred,"progress"));continue;}var _13=_f&&_12===undefined;if(_f&&!_13){_8=_12 instanceof Error;}_10.deferred[_13&&_8?"reject":"resolve"](_13?_6:_12);}catch(e){_10.deferred.reject(e);}}else{if(_8){_10.deferred.reject(_6);}else{_10.deferred.resolve(_6);}}}};this.resolve=this.callback=function(_14){this.fired=0;this.results=[_14,null];_c(_14);};this.reject=this.errback=function(_15){_8=true;this.fired=1;_c(_15);this.results=[null,_15];if(!_15||_15.log!==false){(_1.config.deferredOnError||function(x){console.error(x);})(_15);}};this.progress=function(_16){var _17=_a;while(_17){var _18=_17.progress;_18&&_18(_16);_17=_17.next;}};this.addCallbacks=function(_19,_1a){this.then(_19,_1a,_3);return this;};_b.then=this.then=function(_1b,_1c,_1d){var _1e=_1d==_3?this:new _1.Deferred(_b.cancel);var _1f={resolved:_1b,error:_1c,progress:_1d,deferred:_1e};if(_a){_9=_9.next=_1f;}else{_a=_9=_1f;}if(_7){_e();}return _1e.promise;};var _20=this;_b.cancel=this.cancel=function(){if(!_7){var _21=_5&&_5(_20);if(!_7){if(!(_21 instanceof Error)){_21=new Error(_21);}_21.log=false;_20.reject(_21);}}};_4(_b);};_2.extend(_1.Deferred,{addCallback:function(_22){return this.addCallbacks(_2.hitch.apply(_1,arguments));},addErrback:function(_23){return this.addCallbacks(null,_2.hitch.apply(_1,arguments));},addBoth:function(_24){var _25=_2.hitch.apply(_1,arguments);return this.addCallbacks(_25,_25);},fired:-1});_1.Deferred.when=_1.when=function(_26,_27,_28,_29){if(_26&&typeof _26.then==="function"){return _26.then(_27,_28,_29);}return _27?_27(_26):_26;};return _1.Deferred;});