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Theme Customizer: In JavaScript, add the ability to execute a callback once a set of values have been initialized. see #19910.

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git-svn-id: http://svn.automattic.com/wordpress/trunk@20257 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
koopersmith 2012-03-22 06:52:44 +00:00
parent 6ae2e315fa
commit 34fb54887d
1 changed files with 45 additions and 1 deletions
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44
wp-includes/js/customize-base.dev.js
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@ -377,10 +377,14 @@ if ( typeof wp === 'undefined' )
initialize: function( options ) {
api.Value.prototype.initialize.call( this, {}, options || {} );
this._deferreds = {};
},
instance: function( id ) {
if ( arguments.length === 1 )
return this.value( id );
return this.when.apply( this, arguments );
},
value: function( id ) {
@ -397,6 +401,10 @@ if ( typeof wp === 'undefined' )
this._value[ id ] = value;
this._value[ id ]._parent = this._value;
if ( this._deferreds[ id ] )
this._deferreds[ id ].resolve();
return this._value[ id ];
},
@ -409,6 +417,7 @@ if ( typeof wp === 'undefined' )
remove: function( id ) {
delete this._value[ id ];
delete this._deferreds[ id ];
},
pass: function( fn, args ) {
@ -422,6 +431,41 @@ if ( typeof wp === 'undefined' )
value = this.value( id );
return value[ fn ].apply( value, args );
},
/**
* Runs a callback once all requested values exist.
*
* when( ids*, callback );
*
* For example:
* when( id1, id2, id3, function( value1, value2, value3 ) {} );
*/
when: function() {
var self = this,
ids = slice.call( arguments ),
callback = ids.pop();
$.when.apply( $, $.map( ids, function( id ) {
if ( self.has( id ) )
return;
return self._deferreds[ id ] || ( self._deferreds[ id ] = $.Deferred() );
})).done( function() {
var values = $.map( ids, function( id ) {
return self( id );
});
// If a value is missing, we've used at least one expired deferred.
// Call Values.when again to update our master deferred.
if ( values.length !== ids.length ) {
ids.push( callback );
self.when.apply( self, ids );
return;
}
callback.apply( self, values );
});
}
});