islandora/form_elements/js/jquery.ui.widget.js

/*!
 * jQuery UI Widget 1.8.4
 *
 * Copyright 2010, AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * http://jquery.org/license
 *
 * http://docs.jquery.com/UI/Widget
 */
(function( $, undefined ) {

    var _remove = $.fn.remove;

    $.fn.remove = function( selector, keepData ) {
        return this.each(function() {
            if ( !keepData ) {
                if ( !selector || $.filter( selector, [ this ] ).length ) {
                    $( "*", this ).add( [ this ] ).each(function() {
                        $( this ).triggerHandler( "remove" );
                    });
                }
            }
            return _remove.call( $(this), selector, keepData );
        });
    };

    $.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( true, {}, 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
            $.data( element, this.widgetName, this );
            this.element = $( element );
            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 " +
                "ui-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" + " " +
                    "ui-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 );