/*
 * jQuery Tooltip plugin 1.1
 *
 * http://bassistance.de/jquery-plugins/jquery-plugin-tooltip/
 *
 */
(function($) {
	
	// the tooltip element
	var helper = {},
		// the current tooltipped element
		current,
		// the title of the current element, used for restoring
		title,
		// timeout id for delayed tooltips
		tID,
		// IE 5.5 or 6
		IE = $.browser.msie && /MSIE\s(5\.5|6\.)/.test(navigator.userAgent),
		// flag for mouse tracking
		track = false;
	
	$.Tooltip = {
		blocked: false,
		defaults: {
			delay: 200,
			extraClass: "",
			top: 15,
			left: 15
		},
		block: function() {
			$.Tooltip.blocked = !$.Tooltip.blocked;
		}
	};
	
	$.fn.extend({
		
		showTooltip: function(settings) {
			
			settings = $.extend({}, $.Tooltip.defaults, settings);
			createHelper();
			//return this.each(function() {
			$(this).tSettings = settings;
			// copy tooltip into its own expando and remove the title
			
			this.tooltipText = 'dummy content';
			
			$(this).removeAttr("title");
			// also remove alt attribute to prevent default tooltip in IE
			this.alt = "";
			
		    //$(this).click(hide);
		  
		    //$(this).ready(save);
			save();             <---------------------   this becomes undefined in the save function
		},
		
		fixPNG: IE ? function() {
			return this.each(function () {
				var image = $(this).css('backgroundImage');
				if (image.match(/^url\(["']?(.*\.png)["']?\)$/i)) {
					image = RegExp.$1;
					$(this).css({
						'backgroundImage': 'none',
						'filter': "progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true, sizingMethod=crop, src='" + image + "')"
					}).each(function () {
						var position = $(this).css('position');
						if (position != 'absolute' && position != 'relative')
							$(this).css('position', 'relative');
					});
				}
			});
		} : function() { return this; },
		unfixPNG: IE ? function() {
			return this.each(function () {
				$(this).css({'filter': '', backgroundImage: ''});
			});
		} : function() { return this; },
		hideWhenEmpty: function() {
			return this.each(function() {
				$(this)[ $(this).html() ? "show" : "hide" ]();
			});
		},
		url: function() {
			return this.attr('href') || this.attr('src');
		}
	});
	
	function createHelper() {
		// there can be only one tooltip helper
		if( helper.parent )
			return;
		// create the helper, h3 for title, div for url
		helper.parent = $('<div id="tooltip"><div class="body"></div></div>')
			// hide it at first
			.hide()
			// add to document
			.appendTo('body');
			
		// apply bgiframe if available
		if ( $.fn.bgiframe )
			helper.parent.bgiframe();
		
		// save references to title and url elements
		helper.title = $('div.body', helper.parent);
	}
	
	// main event handler to start showing tooltips
	function handle(event) {
		// show helper, either with timeout or on instant
		if( this.tSettings.delay )
			tID = setTimeout(show, this.tSettings.delay);
		else
			show();
		
		// if selected, update the helper position when the mouse moves
		track = !!this.tSettings.track;
		$('body').bind('mousemove', update);
			
		// update at least once
		update(event);
	}
	
	// save elements title before the tooltip is displayed
	function save() {
		// if this is the current source, or it has no title (occurs with click event), stop
		//if ( $.Tooltip.blocked || this == current || !this.tooltipText ) { return; }
		
		if ( $.Tooltip.blocked ) {
			alert('1');
			return;
		}
		if ( this == current ) {
			alert('2');
			return;
		}
		if ( !this.tooltipText ) {
			alert('3');
			return;
		}

		// save current
		current = this;
		title = this.tooltipText;
		
		title = $('#'+this.tSettings.local).html();
		
		helper.title.html(title).show();
		
		// add an optional class for this tip
		helper.parent.addClass(this.tSettings.extraClass);

		// fix PNG background for IE
		if (this.tSettings.fixPNG)
			helper.parent.fixPNG();
			
		handle.apply(this, arguments);

	}
	
	// delete timeout and show helper
	function show() {
		tID = null;
		helper.parent.show();
		update();
	}
	
	/**
	 * callback for mousemove
	 * updates the helper position
	 * removes itself when no current element
	 */
	function update(event)	{
		if($.Tooltip.blocked)
			return;
		
		// stop updating when tracking is disabled and the tooltip is visible
		if ( !track && helper.parent.is(":visible")) {
			$('body').unbind('mousemove', update)
		}
		
		// if no current element is available, remove this listener
		if( current == null ) {
			$('body').unbind('mousemove', update);
			return;	
		}
		var left = helper.parent[0].offsetLeft;
		var top = helper.parent[0].offsetTop;
		if(event) {
			// position the helper 15 pixel to bottom right, starting from mouse position
			left = event.pageX + current.tSettings.left;
			top = event.pageY + current.tSettings.top;
			helper.parent.css({
				left: left + 'px',
				top: top + 'px'
			});
		}
		var v = viewport(),
			h = helper.parent[0];
		// check horizontal position
		if(v.x + v.cx < h.offsetLeft + h.offsetWidth) {
			left -= h.offsetWidth + 20 + current.tSettings.left;
			helper.parent.css({left: left + 'px'});
		}
		// check vertical position
		if(v.y + v.cy < h.offsetTop + h.offsetHeight) {
			top -= h.offsetHeight + 20 + current.tSettings.top;
			helper.parent.css({top: top + 'px'});
		}
		
	}
	
	function viewport() {
		return {
			x: $(window).scrollLeft(),
			y: $(window).scrollTop(),
			cx: $(window).width(),
			cy: $(window).height()
		};
	}
	
	// hide helper and restore added classes and the title
	function hide(event) {
		if($.Tooltip.blocked)
			return;
		// clear timeout if possible
		if(tID)
			clearTimeout(tID);
		// no more current element
		current = null;
		
		helper.parent.hide().removeClass( this.tSettings.extraClass );
		
		if( this.tSettings.fixPNG )
			helper.parent.unfixPNG();
	}
	
})(jQuery);