/*!
 * jQuery UI Widget 1.8.1
 *
 * 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 ) {
	return this.each(function() {
		if ( !keepData ) {
			if ( !selector || $.filter( selector, [ this ] ).length ) {
				$( "*", this ).add( this ).each(function() {
					$( this ).triggerHandler( "remove" );
				});
			}
		}
		//dom元素在被删除前，触发一下remove事件，jquery框架本身没有对元素删除绑定事件
		return _remove.call( $(this), selector, keepData );
	});
};
 
$.widget = function( name, base, prototype ) {
	var namespace = name.split( "." )[ 0 ],
		fullName;
	name = name.split( "." )[ 1 ];
	fullName = namespace + "-" + name;
	//比如ui.tab,上面的name='tab';fullName='ui-tab';
 
	if ( !prototype ) {
		prototype = base;
		base = $.Widget;
	}
	//如果没有prototype,那么prototype就是base参数,实际base默认为$.Widget
 
	// create selector for plugin
	$.expr[ ":" ][ fullName ] = function( elem ) {
		return !!$.data( elem, name );
	};
 
	$[ namespace ] = $[ namespace ] || {};//是否有命名空间
	$[ namespace ][ name ] = function( options, element ) {//根据上面的例子，即初始化了$.ui.tab=func
		// allow instantiation without initializing for simple inheritance
		if ( arguments.length ) {
			this._createWidget( options, element );
		}
	};
 
	var basePrototype = new base();//初始化，一般都是调用了new $.Widget()
	// 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 );//初始化options值，注意不需要深度拷贝
	$[ namespace ][ name ].prototype = $.extend( true, basePrototype, {
		namespace: namespace,
		widgetName: name,
		widgetEventPrefix: $[ namespace ][ name ].prototype.widgetEventPrefix || name,
		widgetBaseClass: fullName
	}, prototype );
	//为新的ui模块创建原型，使用深度拷贝，在basePrototype上扩展一些模块基本信息，在扩展prototype,比如ui.tabs.js中就是tab的拥有各种方法的大对象
 
	$.widget.bridge( name, $[ namespace ][ name ] );//将此方法挂在jQuery对象上
};
 
$.widget.bridge = function( name, object ) {
	$.fn[ name ] = function( options ) {
		var isMethodCall = typeof options === "string",
			args = Array.prototype.slice.call( arguments, 1 ),
			returnValue = this;
		//如果第一个参数是string类型，就认为是调用模块方法
		//剩下的参数作为方法的参数，后面会用到
 
		// allow multiple hashes to be passed on init
		options = !isMethodCall && args.length ?
			$.extend.apply( null, [ true, options ].concat(args) ) :
			options;
		//可以简单认为是$.extend(true,options,args[0],...),args可以是一个参数或是数组
 
		// prevent calls to internal methods
		if ( isMethodCall && options.substring( 0, 1 ) === "_" ) {
			return returnValue;
		}
		//开头带下划线的方法都是私有方法，不让调用
 
		if ( isMethodCall ) {//如果是调用函数
			this.each(function() {
				var instance = $.data( this, name ),//得到实例，实例作为一个数据和元素关联上
					methodValue = instance && $.isFunction( instance[options] ) ?
						instance[ options ].apply( instance, args ) ://如果实例和方法均存在，调用方法，把args作为参数传进去
						instance;//否则返回undefined
				if ( methodValue !== instance && methodValue !== undefined ) {//如果methodValue不是jquery对象也不是undefined
					returnValue = methodValue;
					return false;//跳出each，一般获取options的值会走这个分支
				}
			});
		} else {//不是函数调用的话
			this.each(function() {
				var instance = $.data( this, name );
				if ( instance ) {//实例存在
					if ( options ) {//有参数
						instance.option( options );//调用option函数，一般是设置状态之类的操作
					}
					instance._init();//再次调用此函数，根据options调整
				} else {
					$.data( this, name, new object( options, this ) );
					//没有实例的话，给元素绑定一个实例。注意这里的this是dom，object是模块类
				}
			});
		}
 
		return returnValue;//返回，有可能是jquery对象，有可能是其他值
	};
};
 
$.Widget = function( options, element ) {//所有模块的基类
	// allow instantiation without initializing for simple inheritance

	if ( arguments.length ) {//如果有参数，调用初始化函数
		this._createWidget( options, element );
	}
};
 
$.Widget.prototype = {
	widgetName: "widget",
	widgetEventPrefix: "",
	options: {
		disabled: false
	},//上面的属性会在创建模块时被覆盖
	_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 );//缓存实例，保存jquery对象
		this.options = $.extend( true, {},
			this.options,
			$.metadata && $.metadata.get( element )[ this.widgetName ],
			options );//参数处理
 
		var self = this;
		this.element.bind( "remove." + this.widgetName, function() {
			self.destroy();
		});//注册销毁事件
 
		this._create();//创建
		this._init();//初始化
	},
	_create: function() {},
	_init: function() {},
 
	destroy: function() {//销毁模块：去除绑定事件、去除数据、去除样式、属性
		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() {//返回jquery对象
		return this.element;
	},
 
	option: function( key, value ) {//设置选项函数
		var options = key,
			self = this;
 
		if ( arguments.length === 0 ) {
			// don't return a reference to the internal hash
			return $.extend( {}, self.options );//返回一个新的对象，不是内部数据的引用
		}
 
		if  (typeof key === "string" ) {
			if ( value === undefined ) {
				return this.options[ key ];//取值
			}
			options = {};
			options[ key ] = value;//设置值
		}
 
		$.each( options, function( key, value ) {
			self._setOption( key, value );//调用内部的_setOption
		});
 
		return self;
	},
	_setOption: function( key, value ) {
		this.options[ key ] = value;
 
		if ( key === "disabled" ) {//增加或是去除className
			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 ) {//把原始的event属性重新赋到event变量上
			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 );	/*!
	 * jQuery UI Mouse 1.8.1
	 *
	 * 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/Mouse
	 *
	 * Depends:
	 *      jquery.ui.widget.js
	 */
	(function($) {
	
	$.widget("ui.mouse", {
	        options: {
	                cancel: ':input,option',
	                distance: 1,
	                delay: 0
	        },
	        _mouseInit: function() {
	                var self = this;
	
	                this.element
	                        .bind('mousedown.'+this.widgetName, function(event) {
	                                return self._mouseDown(event);
	                        })
	                        .bind('click.'+this.widgetName, function(event) {
	                                if(self._preventClickEvent) {
	                                        self._preventClickEvent = false;
	                                        event.stopImmediatePropagation();
	                                        return false;
	                                }
	                        });
	
	                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);
	        },
	
	        _mouseDown: function(event) {
	                // don't let more than one widget handle mouseStart
	                // TODO: figure out why we have to use originalEvent
	                event.originalEvent = event.originalEvent || {};
	                if (event.originalEvent.mouseHandled) { return; }
	
	                // we may have missed mouseup (out of window)
	                (this._mouseStarted && this._mouseUp(event));
	
	                this._mouseDownEvent = event;
	
	                var self = this,
	                        btnIsLeft = (event.which == 1),
	                        elIsCancel = (typeof this.options.cancel == "string" ? $(event.target).parents().add(event.target).filter(this.options.cancel).length : false);
	                if (!btnIsLeft || elIsCancel || !this._mouseCapture(event)) {
	                        return true;
	                }
	
	                this.mouseDelayMet = !this.options.delay;
	                if (!this.mouseDelayMet) {
	                        this._mouseDelayTimer = setTimeout(function() {
	                                self.mouseDelayMet = true;
	                        }, this.options.delay);
	                }
	
	                if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {
	                        this._mouseStarted = (this._mouseStart(event) !== false);
	                        if (!this._mouseStarted) {
	                                event.preventDefault();
	                                return true;
	                        }
	                }
	
	                // these delegates are required to keep context
	                this._mouseMoveDelegate = function(event) {
	                        return self._mouseMove(event);
	                };
	                this._mouseUpDelegate = function(event) {
	                        return self._mouseUp(event);
	                };
	                $(document)
	                        .bind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
	                        .bind('mouseup.'+this.widgetName, this._mouseUpDelegate);
	
	                // preventDefault() is used to prevent the selection of text here -
	                // however, in Safari, this causes select boxes not to be selectable
	                // anymore, so this fix is needed
	                ($.browser.safari || event.preventDefault());
	
	                event.originalEvent.mouseHandled = true;
	                return true;
	        },
	
	        _mouseMove: function(event) {
	                // IE mouseup check - mouseup happened when mouse was out of window
	                if ($.browser.msie && !event.button) {
	                        return this._mouseUp(event);
	                }
	
	                if (this._mouseStarted) {
	                        this._mouseDrag(event);
	                        return event.preventDefault();
	                }
	
	                if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {
	                        this._mouseStarted =
	                                (this._mouseStart(this._mouseDownEvent, event) !== false);
	                        (this._mouseStarted ? this._mouseDrag(event) : this._mouseUp(event));
	                }
	
	                return !this._mouseStarted;
	        },
	
	        _mouseUp: function(event) {
	                $(document)
	                        .unbind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
	                        .unbind('mouseup.'+this.widgetName, this._mouseUpDelegate);
	
	                if (this._mouseStarted) {
	                        this._mouseStarted = false;
	                        this._preventClickEvent = (event.target == this._mouseDownEvent.target);
	                        this._mouseStop(event);
	                }
	
	                return false;
	        },
	
	        _mouseDistanceMet: function(event) {
	                return (Math.max(
	                                Math.abs(this._mouseDownEvent.pageX - event.pageX),
	                                Math.abs(this._mouseDownEvent.pageY - event.pageY)
	                        ) >= this.options.distance
	                );
	        },
	
	        _mouseDelayMet: function(event) {
	                return this.mouseDelayMet;
	        },
	
	        // These are placeholder methods, to be overriden by extending plugin
	        _mouseStart: function(event) {},
	        _mouseDrag: function(event) {},
	        _mouseStop: function(event) {},
	        _mouseCapture: function(event) { return true; }
	});
	
	})(jQuery);

//NEWS DATE FILTER

$(document).ready(function() {
	
	$("a[rel=external], a[rel=external nofollow]").attr("target", "_blank");
	
	if(($(window).height()-50)>$("#wrapper-inner").height())
		$("#footer").addClass("bottom");
		
	$('#rss-link').css( {backgroundPosition: "-15px 0"} )
		.mouseover(function(){
			$(this).stop().animate({backgroundPosition:"-10px -115px"}, {duration:150})
		})
		.mouseout(function(){
			$(this).stop().animate({backgroundPosition:"-15px 0"}, {duration:50})
	})		

});