source: main/trunk/greenstone3/web/interfaces/oran/js/jquery-ui-1.8rc1/ui/jquery.ui.widget.js@ 24245

/*!
 * jQuery UI Widget 1.8rc1
 *
 * Copyright (c) 2010 AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * http://docs.jquery.com/UI/Widget
 */
(function( $ ) {

var _remove = $.fn.remove;

$.fn.remove = function( selector, keepData ) {
    if ( !keepData ) {
        $( "*", this ).add( this ).each(function() {
            $( this ).triggerHandler( "remove" );
        });
    }
    return _remove.apply( this, arguments );
};

$.widget = function( name, base, prototype ) {
    var namespace = name.split( "." )[ 0 ],
        fullName;
    name = name.split( "." )[ 1 ];
    fullName = namespace + "-" + name;

    if ( !prototype ) {
        prototype = base;
        base = $.Widget;
    }

    // create selector for plugin
    $.expr[ ":" ][ fullName ] = function( elem ) {
        return !!$.data( elem, name );
    };

    $[ namespace ] = $[ namespace ] || {};
    $[ namespace ][ name ] = function( options, element ) {
        // allow instantiation without initializing for simple inheritance
        if ( arguments.length ) {
            this._createWidget( options, element );
        }
    };

    var 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
//  $.each( basePrototype, function( key, val ) {
//      if ( $.isPlainObject(val) ) {
//          basePrototype[ key ] = $.extend( {}, val );
//      }
//  });
    basePrototype.options = $.extend( {}, basePrototype.options );
    $[ namespace ][ name ].prototype = $.extend( true, basePrototype, {
        namespace: namespace,
        widgetName: name,
        widgetEventPrefix: $[ namespace ][ name ].prototype.widgetEventPrefix || name,
        widgetBaseClass: fullName
    }, prototype );

    $.widget.bridge( name, $[ namespace ][ name ] );
};

$.widget.bridge = function( name, object ) {
    $.fn[ name ] = function( options ) {
        var isMethodCall = typeof options === "string",
            args = Array.prototype.slice.call( arguments, 1 ),
            returnValue = this;

        // allow multiple hashes to be passed on init
        options = !isMethodCall && args.length ?
            $.extend.apply( null, [ true, options ].concat(args) ) :
            options;

        // prevent calls to internal methods
        if ( isMethodCall && options.substring( 0, 1 ) === "_" ) {
            return returnValue;
        }

        if ( isMethodCall ) {
            this.each(function() {
                var instance = $.data( this, name ),
                    methodValue = instance && $.isFunction( instance[options] ) ?
                        instance[ options ].apply( instance, args ) :
                        instance;
                if ( methodValue !== instance && methodValue !== undefined ) {
                    returnValue = methodValue;
                    return false;
                }
            });
        } else {
            this.each(function() {
                var instance = $.data( this, name );
                if ( instance ) {
                    if ( options ) {
                        instance.option( options );
                    }
                    instance._init();
                } else {
                    $.data( this, name, new object( options, this ) );
                }
            });
        }

        return returnValue;
    };
};

$.Widget = function( options, element ) {
    // allow instantiation without initializing for simple inheritance
    if ( arguments.length ) {
        this._createWidget( options, element );
    }
};

$.Widget.prototype = {
    widgetName: "widget",
    widgetEventPrefix: "",
    options: {
        disabled: false
    },
    _createWidget: function( options, element ) {
        // $.widget.bridge stores the plugin instance, but we do it anyway
        // so that it's stored even before the _create function runs
        this.element = $( element ).data( this.widgetName, this );
        this.options = $.extend( true, {},
            this.options,
            $.metadata && $.metadata.get( element )[ this.widgetName ],
            options );

        var self = this;
        this.element.bind( "remove." + this.widgetName, function() {
            self.destroy();
        });

        this._create();
        this._init();
    },
    _create: function() {},
    _init: function() {},

    destroy: function() {
        this.element
            .unbind( "." + this.widgetName )
            .removeData( this.widgetName );
        this.widget()
            .unbind( "." + this.widgetName )
            .removeAttr( "aria-disabled" )
            .removeClass(
                this.widgetBaseClass + "-disabled " +
                this.namespace + "-state-disabled" );
    },

    widget: function() {
        return this.element;
    },

    option: function( key, value ) {
        var options = key,
            self = this;

        if ( arguments.length === 0 ) {
            // don't return a reference to the internal hash
            return $.extend( {}, self.options );
        }

        if  (typeof key === "string" ) {
            if ( value === undefined ) {
                return this.options[ key ];
            }
            options = {};
            options[ key ] = value;
        }

        $.each( options, function( key, value ) {
            self._setOption( key, value );
        });

        return self;
    },
    _setOption: function( key, value ) {
        this.options[ key ] = value;

        if ( key === "disabled" ) {
            this.widget()
                [ value ? "addClass" : "removeClass"](
                    this.widgetBaseClass + "-disabled" + " " +
                    this.namespace + "-state-disabled" )
                .attr( "aria-disabled", value );
        }

        return this;
    },

    enable: function() {
        return this._setOption( "disabled", false );
    },
    disable: function() {
        return this._setOption( "disabled", true );
    },

    _trigger: function( type, event, data ) {
        var callback = this.options[ type ];

        event = $.Event( event );
        event.type = ( type === this.widgetEventPrefix ?
            type :
            this.widgetEventPrefix + type ).toLowerCase();
        data = data || {};

        // copy original event properties over to the new event
        // this would happen if we could call $.event.fix instead of $.Event
        // but we don't have a way to force an event to be fixed multiple times
        if ( event.originalEvent ) {
            for ( var i = $.event.props.length, prop; i; ) {
                prop = $.event.props[ --i ];
                event[ prop ] = event.originalEvent[ prop ];
            }
        }

        this.element.trigger( event, data );

        return !( $.isFunction(callback) &&
            callback.call( this.element[0], event, data ) === false ||
            event.isDefaultPrevented() );
    }
};

})( jQuery );