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<title>[20797] trunk/wp-includes/js/customize-base.dev.js: Theme Customizer: Make wp.customize.Values.when return a jQuery.Deferred.promise() object, to add additional flexibility.</title>
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<dt>Revision</dt> <dd><a href="http://core.trac.wordpress.org/changeset/20797">20797</a></dd>
<dt>Author</dt> <dd>koopersmith</dd>
<dt>Date</dt> <dd>2012-05-15 22:01:36 +0000 (Tue, 15 May 2012)</dd>
</dl>
<h3>Log Message</h3>
<pre>Theme Customizer: Make wp.customize.Values.when return a jQuery.Deferred.promise() object, to add additional flexibility. see <a href="http://core.trac.wordpress.org/ticket/19910">#19910</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkwpincludesjscustomizebasedevjs">trunk/wp-includes/js/customize-base.dev.js</a></li>
</ul>
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<h3>Diff</h3>
<a id="trunkwpincludesjscustomizebasedevjs"></a>
<div class="modfile"><h4>Modified: trunk/wp-includes/js/customize-base.dev.js (20796 => 20797)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/wp-includes/js/customize-base.dev.js 2012-05-15 21:58:21 UTC (rev 20796)
+++ trunk/wp-includes/js/customize-base.dev.js 2012-05-15 22:01:36 UTC (rev 20797)
</span><span class="lines">@@ -331,36 +331,46 @@
</span><span class="cx"> /**
</span><span class="cx"> * Runs a callback once all requested values exist.
</span><span class="cx"> *
</span><del>- * when( ids*, callback );
</del><ins>+ * when( ids*, [callback] );
</ins><span class="cx"> *
</span><span class="cx"> * For example:
</span><span class="cx"> * when( id1, id2, id3, function( value1, value2, value3 ) {} );
</span><ins>+ *
+ * @returns $.Deferred.promise();
</ins><span class="cx"> */
</span><span class="cx"> when: function() {
</span><span class="cx"> var self = this,
</span><del>- ids = slice.call( arguments ),
- callback = ids.pop();
</del><ins>+ ids = slice.call( arguments ),
+ dfd = $.Deferred();
</ins><span class="cx">
</span><ins>+ // If the last argument is a callback, bind it to .done()
+ if ( $.isFunction( ids[ ids.length - 1 ] ) )
+ dfd.done( ids.pop() );
+
</ins><span class="cx"> $.when.apply( $, $.map( ids, function( id ) {
</span><span class="cx"> if ( self.has( id ) )
</span><span class="cx"> return;
</span><span class="cx">
</span><del>- return self._deferreds[ id ] || ( self._deferreds[ id ] = $.Deferred() );
</del><ins>+ return self._deferreds[ id ] = self._deferreds[ id ] || $.Deferred();
</ins><span class="cx"> })).done( function() {
</span><span class="cx"> var values = $.map( ids, function( id ) {
</span><span class="cx"> return self( id );
</span><span class="cx"> });
</span><span class="cx">
</span><span class="cx"> // If a value is missing, we've used at least one expired deferred.
</span><del>- // Call Values.when again to update our master deferred.
</del><ins>+ // Call Values.when again to generate a new deferred.
</ins><span class="cx"> if ( values.length !== ids.length ) {
</span><del>- ids.push( callback );
- self.when.apply( self, ids );
</del><ins>+ // ids.push( callback );
+ self.when.apply( self, ids ).done( function() {
+ dfd.resolveWith( self, values );
+ });
</ins><span class="cx"> return;
</span><span class="cx"> }
</span><span class="cx">
</span><del>- callback.apply( self, values );
</del><ins>+ dfd.resolveWith( self, values );
</ins><span class="cx"> });
</span><ins>+
+ return dfd.promise();
</ins><span class="cx"> }
</span><span class="cx"> });
</span><span class="cx">
</span></span></pre>
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