Simplified the way a Promise is tested for (removed promiseMarker). Removed isCancell...

[jquery.git] / src / core.js

diff --git a/src/core.js b/src/core.js
index 67429f7..0211808 100644 (file)
--- a/src/core.js
+++ b/src/core.js
@@ -75,10 +75,7 @@ var jQuery = function( selector, context ) {
        indexOf = Array.prototype.indexOf,
 
        // [[Class]] -> type pairs
-       class2type = {},
-       
-       // Marker for deferred
-       deferredMarker = [];
+       class2type = {};
 
 jQuery.fn = jQuery.prototype = {
        init: function( selector, context ) {
@@ -874,7 +871,7 @@ jQuery.extend({
                                
                                // resolve with this as context and given arguments
                                resolve: function() {
-                                       deferred.fire( this , arguments );
+                                       deferred.fire( jQuery.isFunction( this.promise ) ? this.promise() : this , arguments );
                                        return this;
                                },
                                
@@ -888,17 +885,9 @@ jQuery.extend({
                                        cancelled = 1;
                                        callbacks = [];
                                        return this;
-                               },
-                               
-                               // Has this deferred been cancelled?
-                               isCancelled: function() {
-                                       return !!cancelled;
                                }
                        };
                
-               // Add the deferred marker
-               deferred.then._ = deferredMarker;
-               
                return deferred;
        },
        
@@ -906,26 +895,36 @@ jQuery.extend({
        // Typical success/error system
        Deferred: function( func ) {
                
-               var errorDeferred = jQuery._Deferred(),
-                       deferred = jQuery._Deferred(),
-                       successCancel = deferred.cancel;
+               var deferred = jQuery._Deferred(),
+                       failDeferred = jQuery._Deferred();
                        
                // Add errorDeferred methods and redefine cancel                        
                jQuery.extend( deferred , {
 
-                               fail: errorDeferred.then,
-                               fireReject: errorDeferred.fire,
-                               reject: errorDeferred.resolve,
-                               isRejected: errorDeferred.isResolved
+                               fail: failDeferred.then,
+                               fireReject: failDeferred.fire,
+                               reject: failDeferred.resolve,
+                               isRejected: failDeferred.isResolved,
+                               // Get a promise for this deferred
+                               // If obj is provided, the promise aspect is added to the object
+                               promise: function( obj ) {
+                                       obj = obj || {};
+                                       jQuery.each( "then fail isResolved isRejected".split( " " ) , function( _ , method ) {
+                                               obj[ method ] = deferred[ method ];
+                                       });
+                                       obj.promise = function() {
+                                               return obj;
+                                       };
+                                       return obj;
+                               }
 
                } );
                
-               // Remove cancel related
-               delete deferred.cancel;
-               delete deferred.isCancelled;
-               
                // Make sure only one callback list will be used
-               deferred.then( errorDeferred.cancel ).fail( successCancel );
+               deferred.then( failDeferred.cancel ).fail( deferred.cancel );
+               
+               // Unexpose cancel
+               delete deferred.cancel;
                
                // Call given func if any
                if ( func ) {
@@ -935,17 +934,12 @@ jQuery.extend({
                return deferred;
        },
 
-       // Check if an object is a deferred
-       isDeferred: function( object ) {
-               return !!( object && object.then && object.then._ === deferredMarker );
-       },
-       
        // Deferred helper
        when: function( object ) {
-               object = jQuery.isDeferred( object ) ?
+               object = object && jQuery.isFunction( object.promise ) ?
                        object :
                        jQuery.Deferred().resolve( object );
-               return object;
+               return object.promise();
        },
 
        // Use of jQuery.browser is frowned upon.
@@ -966,9 +960,7 @@ jQuery.extend({
 });
 
 // Create readyList deferred
-// also force $.fn.ready to be recognized as a defer
 readyList = jQuery._Deferred();
-jQuery.fn.ready._ = deferredMarker;
 
 // Populate the class2type map
 jQuery.each("Boolean Number String Function Array Date RegExp Object".split(" "), function(i, name) {