86 lines
2.6 KiB
JavaScript
86 lines
2.6 KiB
JavaScript
/*
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Copyright (c) 2004-2011, The Dojo Foundation All Rights Reserved.
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Available via Academic Free License >= 2.1 OR the modified BSD license.
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see: http://dojotoolkit.org/license for details
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*/
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if(!dojo._hasResource["dojo.DeferredList"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
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dojo._hasResource["dojo.DeferredList"] = true;
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dojo.provide("dojo.DeferredList");
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dojo.DeferredList = function(/*Array*/ list, /*Boolean?*/ fireOnOneCallback, /*Boolean?*/ fireOnOneErrback, /*Boolean?*/ consumeErrors, /*Function?*/ canceller){
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// summary:
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// Provides event handling for a group of Deferred objects.
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// description:
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// DeferredList takes an array of existing deferreds and returns a new deferred of its own
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// this new deferred will typically have its callback fired when all of the deferreds in
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// the given list have fired their own deferreds. The parameters `fireOnOneCallback` and
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// fireOnOneErrback, will fire before all the deferreds as appropriate
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//
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// list:
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// The list of deferreds to be synchronizied with this DeferredList
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// fireOnOneCallback:
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// Will cause the DeferredLists callback to be fired as soon as any
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// of the deferreds in its list have been fired instead of waiting until
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// the entire list has finished
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// fireonOneErrback:
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// Will cause the errback to fire upon any of the deferreds errback
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// canceller:
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// A deferred canceller function, see dojo.Deferred
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var resultList = [];
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dojo.Deferred.call(this);
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var self = this;
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if(list.length === 0 && !fireOnOneCallback){
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this.resolve([0, []]);
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}
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var finished = 0;
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dojo.forEach(list, function(item, i){
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item.then(function(result){
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if(fireOnOneCallback){
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self.resolve([i, result]);
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}else{
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addResult(true, result);
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}
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},function(error){
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if(fireOnOneErrback){
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self.reject(error);
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}else{
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addResult(false, error);
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}
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if(consumeErrors){
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return null;
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}
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throw error;
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});
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function addResult(succeeded, result){
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resultList[i] = [succeeded, result];
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finished++;
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if(finished === list.length){
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self.resolve(resultList);
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}
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}
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});
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};
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dojo.DeferredList.prototype = new dojo.Deferred();
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dojo.DeferredList.prototype.gatherResults= function(deferredList){
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// summary:
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// Gathers the results of the deferreds for packaging
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// as the parameters to the Deferred Lists' callback
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var d = new dojo.DeferredList(deferredList, false, true, false);
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d.addCallback(function(results){
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var ret = [];
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dojo.forEach(results, function(result){
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ret.push(result[1]);
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});
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return ret;
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});
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return d;
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};
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}
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