resources/jquery.ui/jquery.ui.widget.js

   1 /*!
   2  * jQuery UI Widget 1.8.2
   3  *
   4  * Copyright (c) 2010 AUTHORS.txt (http://jqueryui.com/about)
   5  * Dual licensed under the MIT (MIT-LICENSE.txt)
   6  * and GPL (GPL-LICENSE.txt) licenses.
   7  *
   8  * http://docs.jquery.com/UI/Widget
   9  */
  10 (function( $ ) {
  11
  12 var _remove = $.fn.remove;
  13
  14 $.fn.remove = function( selector, keepData ) {
  15         return this.each(function() {
  16                 if ( !keepData ) {
  17                         if ( !selector || $.filter( selector, [ this ] ).length ) {
  18                                 $( "*", this ).add( this ).each(function() {
  19                                         $( this ).triggerHandler( "remove" );
  20                                 });
  21                         }
  22                 }
  23                 return _remove.call( $(this), selector, keepData );
  24         });
  25 };
  26
  27 $.widget = function( name, base, prototype ) {
  28         var namespace = name.split( "." )[ 0 ],
  29                 fullName;
  30         name = name.split( "." )[ 1 ];
  31         fullName = namespace + "-" + name;
  32
  33         if ( !prototype ) {
  34                 prototype = base;
  35                 base = $.Widget;
  36         }
  37
  38         // create selector for plugin
  39         $.expr[ ":" ][ fullName ] = function( elem ) {
  40                 return !!$.data( elem, name );
  41         };
  42
  43         $[ namespace ] = $[ namespace ] || {};
  44         $[ namespace ][ name ] = function( options, element ) {
  45                 // allow instantiation without initializing for simple inheritance
  46                 if ( arguments.length ) {
  47                         this._createWidget( options, element );
  48                 }
  49         };
  50
  51         var basePrototype = new base();
  52         // we need to make the options hash a property directly on the new instance
  53         // otherwise we'll modify the options hash on the prototype that we're
  54         // inheriting from
  55 //      $.each( basePrototype, function( key, val ) {
  56 //              if ( $.isPlainObject(val) ) {
  57 //                      basePrototype[ key ] = $.extend( {}, val );
  58 //              }
  59 //      });
  60         basePrototype.options = $.extend( {}, basePrototype.options );
  61         $[ namespace ][ name ].prototype = $.extend( true, basePrototype, {
  62                 namespace: namespace,
  63                 widgetName: name,
  64                 widgetEventPrefix: $[ namespace ][ name ].prototype.widgetEventPrefix || name,
  65                 widgetBaseClass: fullName
  66         }, prototype );
  67
  68         $.widget.bridge( name, $[ namespace ][ name ] );
  69 };
  70
  71 $.widget.bridge = function( name, object ) {
  72         $.fn[ name ] = function( options ) {
  73                 var isMethodCall = typeof options === "string",
  74                         args = Array.prototype.slice.call( arguments, 1 ),
  75                         returnValue = this;
  76
  77                 // allow multiple hashes to be passed on init
  78                 options = !isMethodCall && args.length ?
  79                         $.extend.apply( null, [ true, options ].concat(args) ) :
  80                         options;
  81
  82                 // prevent calls to internal methods
  83                 if ( isMethodCall && options.substring( 0, 1 ) === "_" ) {
  84                         return returnValue;
  85                 }
  86
  87                 if ( isMethodCall ) {
  88                         this.each(function() {
  89                                 var instance = $.data( this, name ),
  90                                         methodValue = instance && $.isFunction( instance[options] ) ?
  91                                                 instance[ options ].apply( instance, args ) :
  92                                                 instance;
  93                                 if ( methodValue !== instance && methodValue !== undefined ) {
  94                                         returnValue = methodValue;
  95                                         return false;
  96                                 }
  97                         });
  98                 } else {
  99                         this.each(function() {
 100                                 var instance = $.data( this, name );
 101                                 if ( instance ) {
 102                                         if ( options ) {
 103                                                 instance.option( options );
 104                                         }
 105                                         instance._init();
 106                                 } else {
 107                                         $.data( this, name, new object( options, this ) );
 108                                 }
 109                         });
 110                 }
 111
 112                 return returnValue;
 113         };
 114 };
 115
 116 $.Widget = function( options, element ) {
 117         // allow instantiation without initializing for simple inheritance
 118         if ( arguments.length ) {
 119                 this._createWidget( options, element );
 120         }
 121 };
 122
 123 $.Widget.prototype = {
 124         widgetName: "widget",
 125         widgetEventPrefix: "",
 126         options: {
 127                 disabled: false
 128         },
 129         _createWidget: function( options, element ) {
 130                 // $.widget.bridge stores the plugin instance, but we do it anyway
 131                 // so that it's stored even before the _create function runs
 132                 this.element = $( element ).data( this.widgetName, this );
 133                 this.options = $.extend( true, {},
 134                         this.options,
 135                         $.metadata && $.metadata.get( element )[ this.widgetName ],
 136                         options );
 137
 138                 var self = this;
 139                 this.element.bind( "remove." + this.widgetName, function() {
 140                         self.destroy();
 141                 });
 142
 143                 this._create();
 144                 this._init();
 145         },
 146         _create: function() {},
 147         _init: function() {},
 148
 149         destroy: function() {
 150                 this.element
 151                         .unbind( "." + this.widgetName )
 152                         .removeData( this.widgetName );
 153                 this.widget()
 154                         .unbind( "." + this.widgetName )
 155                         .removeAttr( "aria-disabled" )
 156                         .removeClass(
 157                                 this.widgetBaseClass + "-disabled " +
 158                                 "ui-state-disabled" );
 159         },
 160
 161         widget: function() {
 162                 return this.element;
 163         },
 164
 165         option: function( key, value ) {
 166                 var options = key,
 167                         self = this;
 168
 169                 if ( arguments.length === 0 ) {
 170                         // don't return a reference to the internal hash
 171                         return $.extend( {}, self.options );
 172                 }
 173
 174                 if  (typeof key === "string" ) {
 175                         if ( value === undefined ) {
 176                                 return this.options[ key ];
 177                         }
 178                         options = {};
 179                         options[ key ] = value;
 180                 }
 181
 182                 $.each( options, function( key, value ) {
 183                         self._setOption( key, value );
 184                 });
 185
 186                 return self;
 187         },
 188         _setOption: function( key, value ) {
 189                 this.options[ key ] = value;
 190
 191                 if ( key === "disabled" ) {
 192                         this.widget()
 193                                 [ value ? "addClass" : "removeClass"](
 194                                         this.widgetBaseClass + "-disabled" + " " +
 195                                         "ui-state-disabled" )
 196                                 .attr( "aria-disabled", value );
 197                 }
 198
 199                 return this;
 200         },
 201
 202         enable: function() {
 203                 return this._setOption( "disabled", false );
 204         },
 205         disable: function() {
 206                 return this._setOption( "disabled", true );
 207         },
 208
 209         _trigger: function( type, event, data ) {
 210                 var callback = this.options[ type ];
 211
 212                 event = $.Event( event );
 213                 event.type = ( type === this.widgetEventPrefix ?
 214                         type :
 215                         this.widgetEventPrefix + type ).toLowerCase();
 216                 data = data || {};
 217
 218                 // copy original event properties over to the new event
 219                 // this would happen if we could call $.event.fix instead of $.Event
 220                 // but we don't have a way to force an event to be fixed multiple times
 221                 if ( event.originalEvent ) {
 222                         for ( var i = $.event.props.length, prop; i; ) {
 223                                 prop = $.event.props[ --i ];
 224                                 event[ prop ] = event.originalEvent[ prop ];
 225                         }
 226                 }
 227
 228                 this.element.trigger( event, data );
 229
 230                 return !( $.isFunction(callback) &&
 231                         callback.call( this.element[0], event, data ) === false ||
 232                         event.isDefaultPrevented() );
 233         }
 234 };
 235
 236 })( jQuery );