/*
 * jQuery UI @VERSION
 *
 * Copyright (c) 2008 Paul Bakaus (ui.jquery.com)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * http://docs.jquery.com/UI
 */
;(function($) {

/** jQuery core modifications and additions **/

var _remove = $.fn.remove;
$.fn.remove = function() {
    $("*", this).add(this).triggerHandler("remove");
    return _remove.apply(this, arguments );
};

// This adds a selector to check if data exists.
$.expr[':'].data = "jQuery.data(a, m[3])";

$.keyCode = {
    BACKSPACE: 8,
    CAPS_LOCK: 20,
    COMMA: 188,
    CONTROL: 17,
    DELETE: 46,
    DOWN: 40,
    END: 35,
    ENTER: 13,
    ESCAPE: 27,
    HOME: 36,
    INSERT: 45,
    LEFT: 37,
    NUMPAD_ADD: 107,
    NUMPAD_DECIMAL: 110,
    NUMPAD_DIVIDE: 111,
    NUMPAD_ENTER: 108,
    NUMPAD_MULTIPLY: 106,
    NUMPAD_SUBTRACT: 109,
    PAGE_DOWN: 34,
    PAGE_UP: 33,
    PERIOD: 190,
    RIGHT: 39,
    SHIFT: 16,
    SPACE: 32,
    TAB: 9,
    UP: 38
};

// $.widget is a factory to create jQuery plugins
// taking some boilerplate code out of the plugin code
// created by Scott González and Jörn Zaefferer
function getter(namespace, plugin, method) {
    var methods = $[namespace][plugin].getter || [];
    methods = (typeof methods == "string" ? methods.split(/,?\s+/) : methods);
    return ($.inArray(method, methods) != -1);
}

$.widget = function(name, prototype) {
    var namespace = name.split(".")[0];
    name = name.split(".")[1];
    
    // create plugin method
    $.fn[name] = function(options) {
        var isMethodCall = (typeof options == 'string'),
            args = Array.prototype.slice.call(arguments, 1);
        
        // prevent calls to internal methods
        if (isMethodCall && options.substring(0, 1) == '_') {
            return this;
        }
        
        // handle getter methods
        if (isMethodCall && getter(namespace, name, options)) {
            var instance = $.data(this[0], name);
            return (instance ? instance[options].apply(instance, args)
                : undefined);
        }
        
        // handle initialization and non-getter methods
        return this.each(function() {
            var instance = $.data(this, name);
            if (isMethodCall && instance && $.isFunction(instance[options])) {
                instance[options].apply(instance, args);
            } else if (!isMethodCall) {
                $.data(this, name, new $[namespace][name](this, options));
            }
        });
    };
    
    // create widget constructor
    $[namespace][name] = function(element, options) {
        var self = this;
        
        this.widgetName = name;
        this.widgetEventPrefix = $[namespace][name].eventPrefix || name;
        this.widgetBaseClass = namespace + '-' + name;
        
        this.options = $.extend({},
            $.widget.defaults,
            $[namespace][name].defaults,
            $.metadata && $.metadata.get(element)[name],
            options);
        
        this.element = $(element)
            .bind('setData.' + name, function(e, key, value) {
                return self._setData(key, value);
            })
            .bind('getData.' + name, function(e, key) {
                return self._getData(key);
            })
            .bind('remove', function() {
                return self.destroy();
            });
        
        this._init();
    };
    
    // add widget prototype
    $[namespace][name].prototype = $.extend({}, $.widget.prototype, prototype);
};

$.widget.prototype = {
    _init: function() {},
    destroy: function() {
        this.element.removeData(this.widgetName);
    },
    
    _getData: function(key) {
        return this.options[key];
    },
    _setData: function(key, value) {
        this.options[key] = value;
        
        if (key == 'disabled') {
            this.element[value ? 'addClass' : 'removeClass'](
                this.widgetBaseClass + '-disabled');
        }
    },
    
    enable: function() {
        this._setData('disabled', false);
    },
    disable: function() {
        this._setData('disabled', true);
    },
    
    _trigger: function(type, e, data) {
        var eventName = (type == this.widgetEventPrefix
            ? type : this.widgetEventPrefix + type);
        e = e  || $.event.fix({ type: eventName, target: this.element[0] });
        return this.element.triggerHandler(eventName, [e, data], this.options[type]);
    }
};

$.widget.defaults = {
    disabled: false
};


/** jQuery UI core **/

$.ui = {
    plugin: {
        add: function(module, option, set) {
            var proto = $.ui[module].prototype;
            for(var i in set) {
                proto.plugins[i] = proto.plugins[i] || [];
                proto.plugins[i].push([option, set[i]]);
            }
        },
        call: function(instance, name, args) {
            var set = instance.plugins[name];
            if(!set) { return; }
            
            for (var i = 0; i < set.length; i++) {
                if (instance.options[set[i][0]]) {
                    set[i][1].apply(instance.element, args);
                }
            }
        }    
    },
    cssCache: {},
    css: function(name) {
        if ($.ui.cssCache[name]) { return $.ui.cssCache[name]; }
        var tmp = $('<div class="ui-gen">').addClass(name).css({position:'absolute', top:'-5000px', left:'-5000px', display:'block'}).appendTo('body');
        
        //if (!$.browser.safari)
            //tmp.appendTo('body'); 
        
        //Opera and Safari set width and height to 0px instead of auto
        //Safari returns rgba(0,0,0,0) when bgcolor is not set
        $.ui.cssCache[name] = !!(
            (!(/auto|default/).test(tmp.css('cursor')) || (/^[1-9]/).test(tmp.css('height')) || (/^[1-9]/).test(tmp.css('width')) || 
            !(/none/).test(tmp.css('backgroundImage')) || !(/transparent|rgba\(0, 0, 0, 0\)/).test(tmp.css('backgroundColor')))
        );
        try { $('body').get(0).removeChild(tmp.get(0));    } catch(e){}
        return $.ui.cssCache[name];
    },
    disableSelection: function(el) {
        $(el)
            .attr('unselectable', 'on')
            .css('MozUserSelect', 'none')
            .bind('selectstart.ui', function() { return false; });
    },
    enableSelection: function(el) {
        $(el)
            .attr('unselectable', 'off')
            .css('MozUserSelect', '')
            .unbind('selectstart.ui');
    },
    hasScroll: function(e, a) {
        var scroll = (a && a == 'left') ? 'scrollLeft' : 'scrollTop',
            has = false;
        
        if (e[scroll] > 0) { return true; }
        
        // TODO: determine which cases actually cause this to happen
        // if the element doesn't have the scroll set, see if it's possible to
        // set the scroll
        e[scroll] = 1;
        has = (e[scroll] > 0);
        e[scroll] = 0;
        return has;
    }
};


/** Mouse Interaction Plugin **/

$.ui.mouse = {
    _mouseInit: function() {
        var self = this;
    
        this.element.bind('mousedown.'+this.widgetName, function(e) {
            return self._mouseDown(e);
        });
        
        // Prevent text selection in IE
        if ($.browser.msie) {
            this._mouseUnselectable = this.element.attr('unselectable');
            this.element.attr('unselectable', 'on');
        }
        
        this.started = false;
    },
    
    // TODO: make sure destroying one instance of mouse doesn't mess with
    // other instances of mouse
    _mouseDestroy: function() {
        this.element.unbind('.'+this.widgetName);
        
        // Restore text selection in IE
        ($.browser.msie
            && this.element.attr('unselectable', this._mouseUnselectable));
    },
    
    _mouseDown: function(e) {
        // we may have missed mouseup (out of window)
        (this._mouseStarted && this._mouseUp(e));
        
        this._mouseDownEvent = e;
        
        var self = this,
            btnIsLeft = (e.which == 1),
            elIsCancel = (typeof this.options.cancel == "string" ? $(e.target).parents().add(e.target).filter(this.options.cancel).length : false);
        if (!btnIsLeft || elIsCancel || !this._mouseCapture(e)) {
            return true;
        }
        
        this.mouseDelayMet = !this.options.delay;
        if (!this.mouseDelayMet) {
            this._mouseDelayTimer = setTimeout(function() {
                self.mouseDelayMet = true;
            }, this.options.delay);
        }
        
        if (this._mouseDistanceMet(e) && this._mouseDelayMet(e)) {
            this._mouseStarted = (this._mouseStart(e) !== false);
            if (!this._mouseStarted) {
                e.preventDefault();
                return true;
            }
        }
        
        // these delegates are required to keep context
        this._mouseMoveDelegate = function(e) {
            return self._mouseMove(e);
        };
        this._mouseUpDelegate = function(e) {
            return self._mouseUp(e);
        };
        $(document)
            .bind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
            .bind('mouseup.'+this.widgetName, this._mouseUpDelegate);
        
        return false;
    },
    
    _mouseMove: function(e) {
        // IE mouseup check - mouseup happened when mouse was out of window
        if ($.browser.msie && !e.button) {
            return this._mouseUp(e);
        }
        
        if (this._mouseStarted) {
            this._mouseDrag(e);
            return false;
        }
        
        if (this._mouseDistanceMet(e) && this._mouseDelayMet(e)) {
            this._mouseStarted =
                (this._mouseStart(this._mouseDownEvent, e) !== false);
            (this._mouseStarted ? this._mouseDrag(e) : this._mouseUp(e));
        }
        
        return !this._mouseStarted;
    },
    
    _mouseUp: function(e) {
        $(document)
            .unbind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
            .unbind('mouseup.'+this.widgetName, this._mouseUpDelegate);
        
        if (this._mouseStarted) {
            this._mouseStarted = false;
            this._mouseStop(e);
        }
        
        return false;
    },
    
    _mouseDistanceMet: function(e) {
        return (Math.max(
                Math.abs(this._mouseDownEvent.pageX - e.pageX),
                Math.abs(this._mouseDownEvent.pageY - e.pageY)
            ) >= this.options.distance
        );
    },
    
    _mouseDelayMet: function(e) {
        return this.mouseDelayMet;
    },
    
    // These are placeholder methods, to be overriden by extending plugin
    _mouseStart: function(e) {},
    _mouseDrag: function(e) {},
    _mouseStop: function(e) {},
    _mouseCapture: function(e) { return true; }
};

$.ui.mouse.defaults = {
    cancel: null,
    distance: 1,
    delay: 0
};

})(jQuery);