adobe/brackets

/*!
 * jQuery UI Widget @VERSION
 *
 * Copyright 2012, 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 slice = Array.prototype.slice,
    _cleanData = $.cleanData;
$.cleanData = function( elems ) {
    for ( var i = 0, elem; (elem = elems[i]) != null; i++ ) {
        try {
            $( elem ).triggerHandler( "remove" );
        // http://bugs.jquery.com/ticket/8235
        } catch( e ) {}
    }
    _cleanData( elems );
};

$.widget = function( name, base, prototype ) {
    var fullName, existingConstructor, constructor, basePrototype,
        namespace = name.split( "." )[ 0 ];

    name = name.split( "." )[ 1 ];
    fullName = namespace + "-" + name;

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

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

    $[ namespace ] = $[ namespace ] || {};
    existingConstructor = $[ namespace ][ name ];
    constructor = $[ namespace ][ name ] = function( options, element ) {
        // allow instantiation without "new" keyword
        if ( !this._createWidget ) {
            return new constructor( 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 );
        }
    };
    // 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: []
    });

    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
    basePrototype.options = $.widget.extend( {}, basePrototype.options );
    $.each( prototype, function( prop, value ) {
        if ( $.isFunction( value ) ) {
            prototype[ prop ] = (function() {
                var _super = function() {
                        return base.prototype[ prop ].apply( this, arguments );
                    },
                    _superApply = function( args ) {
                        return base.prototype[ prop ].apply( this, args );
                    };
                return function() {
                    var __super = this._super,
                        __superApply = this._superApply,
                        returnValue;

                    this._super = _super;
                    this._superApply = _superApply;

                    returnValue = value.apply( this, arguments );

                    this._super = __super;
                    this._superApply = __superApply;

                    return returnValue;
                };
            })();
        }
    });
    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,
        // TODO remove widgetBaseClass, see #8155
        widgetBaseClass: fullName,
        widgetFullName: fullName
    });

    // 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 ) {
    var input = slice.call( arguments, 1 ),
        inputIndex = 0,
        inputLength = input.length,
        key,
        value;
    for ( ; inputIndex < inputLength; inputIndex++ ) {
        for ( key in input[ inputIndex ] ) {
            value = input[ inputIndex ][ key ];
            if (input[ inputIndex ].hasOwnProperty( key ) && value !== undefined ) {
                target[ key ] = $.isPlainObject( value ) ? $.widget.extend( {}, target[ key ], value ) : value;
            }
        }
    }
    return target;
};

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

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

        if ( isMethodCall ) {
            this.each(function() {
                var methodValue,
                    instance = $.data( this, fullName );
                if ( !instance ) {
                    return $.error( "cannot call methods on " + name + " prior to initialization; " +
                        "attempted to call method '" + options + "'" );
                }
                if ( !$.isFunction( instance[options] ) || options.charAt( 0 ) === "_" ) {
                    return $.error( "no such method '" + options + "' for " + name + " widget instance" );
                }
                methodValue = instance[ options ].apply( instance, args );
                if ( methodValue !== instance && methodValue !== undefined ) {
                    returnValue = methodValue && methodValue.jquery ?
                        returnValue.pushStack( methodValue.get() ) :
                        methodValue;
                    return false;
                }
            });
        } else {
            this.each(function() {
                var instance = $.data( this, fullName );
                if ( instance ) {
                    instance.option( options || {} )._init();
                } else {
                    new object( options, this );
                }
            });
        }

        return returnValue;
    };
};

$.Widget = function( options, element ) {};
$.Widget._childConstructors = [];

$.Widget.prototype = {
    widgetName: "widget",
    widgetEventPrefix: "",
    defaultElement: "<div>",
    options: {
        disabled: false,

        // callbacks
        create: null
    },
    _createWidget: function( options, element ) {
        element = $( element || this.defaultElement || this )[ 0 ];
        this.element = $( element );
        this.options = $.widget.extend( {},
            this.options,
            this._getCreateOptions(),
            options );

        this.bindings = $();
        this.hoverable = $();
        this.focusable = $();

        if ( element !== this ) {
            // 1.9 BC for #7810
            // TODO remove dual storage
            $.data( element, this.widgetName, this );
            $.data( element, this.widgetFullName, this );
            this._bind({ remove: "destroy" });
            this.document = $( element.style ?
                // element within the document
                element.ownerDocument :
                // element is window or document
                element.document || element );
            this.window = $( this.document[0].defaultView || this.document[0].parentWindow );
        }

        this._create();
        this._trigger( "create", null, this._getCreateEventData() );
        this._init();
    },
    _getCreateOptions: $.noop,
    _getCreateEventData: $.noop,
    _create: $.noop,
    _init: $.noop,

    destroy: function() {
        this._destroy();
        // we can probably remove the unbind calls in 2.0
        // all event bindings should go through this._bind()
        this.element
            .unbind( "." + this.widgetName )
            // 1.9 BC for #7810
            // TODO remove dual storage
            .removeData( this.widgetName )
            .removeData( this.widgetFullName )
            // support: jquery <1.6.3
            // http://bugs.jquery.com/ticket/9413
            .removeData( $.camelCase( this.widgetFullName ) );
        this.widget()
            .unbind( "." + this.widgetName )
            .removeAttr( "aria-disabled" )
            .removeClass(
                this.widgetFullName + "-disabled " +
                "ui-state-disabled" );

        // clean up events and states
        this.bindings.unbind( "." + this.widgetName );
        this.hoverable.removeClass( "ui-state-hover" );
        this.focusable.removeClass( "ui-state-focus" );
    },
    _destroy: $.noop,

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

    option: function( key, value ) {
        var options = key,
            parts,
            curOption,
            i;

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

        if ( typeof key === "string" ) {
            // handle nested keys, e.g., "foo.bar" => { foo: { bar: ___ } }
            options = {};
            parts = key.split( "." );
            key = parts.shift();
            if ( parts.length ) {
                curOption = options[ key ] = $.widget.extend( {}, this.options[ key ] );
                for ( i = 0; i < parts.length - 1; i++ ) {
                    curOption[ parts[ i ] ] = curOption[ parts[ i ] ] || {};
                    curOption = curOption[ parts[ i ] ];
                }
                key = parts.pop();
                if ( value === undefined ) {
                    return curOption[ key ] === undefined ? null : curOption[ key ];
                }
                curOption[ key ] = value;
            } else {
                if ( value === undefined ) {
                    return this.options[ key ] === undefined ? null : this.options[ key ];
                }
                options[ key ] = value;
            }
        }

        this._setOptions( options );

        return this;
    },
    _setOptions: function( options ) {
        var key;

        for ( key in options ) {
            this._setOption( key, options[ key ] );
        }

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

        if ( key === "disabled" ) {
            this.widget()
                .toggleClass( this.widgetFullName + "-disabled ui-state-disabled", !!value )
                .attr( "aria-disabled", value );
            this.hoverable.removeClass( "ui-state-hover" );
            this.focusable.removeClass( "ui-state-focus" );
        }

        return this;
    },

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

    _bind: function( element, handlers ) {
        // no element argument, shuffle and use this.element
        if ( !handlers ) {
            handlers = element;
            element = this.element;
        } else {
            // accept selectors, DOM elements
            element = $( element );
            this.bindings = this.bindings.add( element );
        }

        var instance = this;
        $.each( handlers, function( event, handler ) {
            function handlerProxy() {
                // allow widgets to customize the disabled handling
                // - disabled as an array instead of boolean
                // - disabled class as method for disabling individual parts
                if ( instance.options.disabled === true ||
                        $( this ).hasClass( "ui-state-disabled" ) ) {
                    return;
                }
                return ( typeof handler === "string" ? instance[ handler ] : handler )
                    .apply( instance, arguments );
            }

            // copy the guid so direct unbinding works
            if ( typeof handler !== "string" ) {
                handlerProxy.guid = handler.guid =
                    handler.guid || handlerProxy.guid || jQuery.guid++;
            }

            var match = event.match( /^(\w+)\s*(.*)$/ ),
                eventName = match[1] + "." + instance.widgetName,
                selector = match[2];
            if ( selector ) {
                instance.widget().delegate( selector, eventName, handlerProxy );
            } else {
                element.bind( eventName, handlerProxy );
            }
        });
    },

    _delay: function( handler, delay ) {
        function handlerProxy() {
            return ( typeof handler === "string" ? instance[ handler ] : handler )
                .apply( instance, arguments );
        }
        var instance = this;
        return setTimeout( handlerProxy, delay || 0 );
    },

    _hoverable: function( element ) {
        this.hoverable = this.hoverable.add( element );
        this._bind( element, {
            mouseenter: function( event ) {
                $( event.currentTarget ).addClass( "ui-state-hover" );
            },
            mouseleave: function( event ) {
                $( event.currentTarget ).removeClass( "ui-state-hover" );
            }
        });
    },

    _focusable: function( element ) {
        this.focusable = this.focusable.add( element );
        this._bind( element, {
            focusin: function( event ) {
                $( event.currentTarget ).addClass( "ui-state-focus" );
            },
            focusout: function( event ) {
                $( event.currentTarget ).removeClass( "ui-state-focus" );
            }
        });
    },

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

        data = data || {};
        event = $.Event( event );
        event.type = ( type === this.widgetEventPrefix ?
            type :
            this.widgetEventPrefix + type ).toLowerCase();
        // the original event may come from any element
        // so we need to reset the target on the new event
        event.target = this.element[ 0 ];

        // copy original event properties over to the new event
        orig = event.originalEvent;
        if ( orig ) {
            for ( prop in orig ) {
                if ( !( prop in event ) ) {
                    event[ prop ] = orig[ prop ];
                }
            }
        }

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

$.each( { show: "fadeIn", hide: "fadeOut" }, function( method, defaultEffect ) {
    $.Widget.prototype[ "_" + method ] = function( element, options, callback ) {
        if ( typeof options === "string" ) {
            options = { effect: options };
        }
        var hasOptions,
            effectName = !options ?
                method :
                options === true || typeof options === "number" ?
                    defaultEffect :
                    options.effect || defaultEffect;
        options = options || {};
        if ( typeof options === "number" ) {
            options = { duration: options };
        }
        hasOptions = !$.isEmptyObject( options );
        options.complete = callback;
        if ( options.delay ) {
            element.delay( options.delay );
        }
        if ( hasOptions && $.effects && ( $.effects.effect[ effectName ] || $.uiBackCompat !== false && $.effects[ effectName ] ) ) {
            element[ method ]( options );
        } else if ( effectName !== method && element[ effectName ] ) {
            element[ effectName ]( options.duration, options.easing, callback );
        } else {
            element.queue(function( next ) {
                $( this )[ method ]();
                if ( callback ) {
                    callback.call( element[ 0 ] );
                }
                next();
            });
        }
    };
});

// DEPRECATED
if ( $.uiBackCompat !== false ) {
    $.Widget.prototype._getCreateOptions = function() {
        return $.metadata && $.metadata.get( this.element[0] )[ this.widgetName ];
    };
}

})( jQuery );