diff options
Diffstat (limited to 'ui/jquery.ui.widget.js')
| -rw-r--r-- | ui/jquery.ui.widget.js | 74 |
1 files changed, 49 insertions, 25 deletions
diff --git a/ui/jquery.ui.widget.js b/ui/jquery.ui.widget.js index ad03e6f44..bf26373e1 100644 --- a/ui/jquery.ui.widget.js +++ b/ui/jquery.ui.widget.js @@ -23,8 +23,9 @@ $.cleanData = function( elems ) { }; $.widget = function( name, base, prototype ) { - var namespace = name.split( "." )[ 0 ], - fullName; + var fullName, existingConstructor, constructor, basePrototype, + namespace = name.split( "." )[ 0 ]; + name = name.split( "." )[ 1 ]; fullName = namespace + "-" + name; @@ -39,12 +40,11 @@ $.widget = function( name, base, prototype ) { }; $[ namespace ] = $[ namespace ] || {}; - // create the constructor using $.extend() so we can carry over any - // static properties stored on the existing constructor (if there is one) - $[ namespace ][ name ] = $.extend( function( options, element ) { + existingConstructor = $[ namespace ][ name ]; + constructor = $[ namespace ][ name ] = function( options, element ) { // allow instantiation without "new" keyword if ( !this._createWidget ) { - return new $[ namespace ][ name ]( options, element ); + return new constructor( options, element ); } // allow instantiation without initializing for simple inheritance @@ -52,9 +52,19 @@ $.widget = function( name, base, prototype ) { if ( arguments.length ) { this._createWidget( options, element ); } - }, $[ namespace ][ name ], { version: prototype.version } ); + }; + // extend with the existing constructor to carry over any static properties + $.extend( constructor, existingConstructor, { + version: prototype.version, + // copy the object used to create the prototype in case we need to + // redefine the widget later + _proto: $.extend( {}, prototype ), + // track widgets that inherit from this widget in case this widget is + // redefined after a widget inherits from it + _childConstructors: [] + }); - var basePrototype = new base(); + basePrototype = new base(); // we need to make the options hash a property directly on the new instance // otherwise we'll modify the options hash on the prototype that we're // inheriting from @@ -83,17 +93,41 @@ $.widget = function( name, base, prototype ) { return returnValue; }; - }()); + })(); } }); - $[ namespace ][ name ].prototype = $.widget.extend( basePrototype, { + constructor.prototype = $.widget.extend( basePrototype, { + // TODO: remove support for widgetEventPrefix + // always use the name + a colon as the prefix, e.g., draggable:start + // don't prefix for widgets that aren't DOM-based + widgetEventPrefix: name + }, prototype, { + constructor: constructor, namespace: namespace, widgetName: name, - widgetEventPrefix: name, widgetBaseClass: fullName - }, prototype ); + }); - $.widget.bridge( name, $[ namespace ][ name ] ); + // If this widget is being redefined then we need to find all widgets that + // are inheriting from it and redefine all of them so that they inherit from + // the new version of this widget. We're essentially trying to replace one + // level in the prototype chain. + if ( existingConstructor ) { + $.each( existingConstructor._childConstructors, function( i, child ) { + var childPrototype = child.prototype; + + // redefine the child widget using the same prototype that was + // originally used, but inherit from the new version of the base + $.widget( childPrototype.namespace + "." + childPrototype.widgetName, constructor, child._proto ); + }); + // remove the list of existing child constructors from the old constructor + // so the old child constructors can be garbage collected + delete existingConstructor._childConstructors; + } else { + base._childConstructors.push( constructor ); + } + + $.widget.bridge( name, constructor ); }; $.widget.extend = function( target ) { @@ -157,18 +191,8 @@ $.widget.bridge = function( name, object ) { }; }; -$.Widget = function( options, element ) { - // allow instantiation without "new" keyword - if ( !this._createWidget ) { - return new $[ namespace ][ name ]( options, element ); - } - - // allow instantiation without initializing for simple inheritance - // must use "new" keyword (the code above always passes args) - if ( arguments.length ) { - this._createWidget( options, element ); - } -}; +$.Widget = function( options, element ) {}; +$.Widget._childConstructors = []; $.Widget.prototype = { widgetName: "widget", |