/*
* jQuery Tooltip plugin 1.3
*
* http://bassistance.de/jquery-plugins/jquery-plugin-tooltip/
* http://docs.jquery.com/Plugins/Tooltip
*
* Copyright (c) 2006 - 2008 Jörn Zaefferer
*
* $Id: jquery.tooltip.js 5741 2008-06-21 15:22:16Z joern.zaefferer $
* 
* Dual licensed under the MIT and GPL licenses:
*   http://www.opensource.org/licenses/mit-license.php
*   http://www.gnu.org/licenses/gpl.html
 
THIS PLUGIN WAS MODIFIED FROM THE ORIGINAL VERSION 
*/

; (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,
			fade: false,
			showURL: true,
			extraClass: "",
			top: 15,
			left: 15,
			id: "tooltip"
		},
		block: function() {
			$.tooltip.blocked = !$.tooltip.blocked;
		}
	};

	$.fn.extend({
		tooltip: function(settings) {
			settings = $.extend({}, $.tooltip.defaults, settings);
			createHelper(settings);
			return this.each(function() {
				$.data(this, "tooltip", settings);
				this.tOpacity = helper.parent.css("opacity");
				// copy tooltip into its own expando and remove the title
				this.tooltipText = this.title;
				$(this).removeAttr("title");
				// also remove alt attribute to prevent default tooltip in IE
				this.alt = "";
			})
				.mouseover(save)
				.mouseout(hide)
				.click(hide);
		},
		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(settings) {
		// there can be only one tooltip helper
		if (helper.parent)
			return;
		// create the helper, h3 for title, div for url
		helper.parent = $('<div id="' + settings.id + '"><h3></h3><div class="Glyph"></div><div class="body"></div><div class="url"></div></div>')
		// add to document
			.appendTo(document.body)
		// hide it at first
			.hide();

		// apply bgiframe if available
		if ($.fn.bgiframe)
			helper.parent.bgiframe();

		// save references to title and url elements
		helper.title = $('h3', helper.parent);
		helper.body = $('div.body', helper.parent);
		helper.url = $('div.url', helper.parent);
	}

	function settings(element) {
		return $.data(element, "tooltip");
	}

	// main event handler to start showing tooltips
	function handle(event) {
		// show helper, either with timeout or on instant
		if (settings(this).delay)
			tID = setTimeout(show, settings(this).delay);
		else
			show();

		// if selected, update the helper position when the mouse moves
		track = !!settings(this).track;
		$(document.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 && !settings(this).bodyHandler))
			return;

		// save current
		current = this;
		title = this.tooltipText;

		if (settings(this).bodyHandler) {
			helper.title.hide();
			var bodyContent = settings(this).bodyHandler.call(this);
			if (bodyContent.nodeType || bodyContent.jquery) {
				helper.body.empty().append(bodyContent)
			} else {
				helper.body.html(bodyContent);
			}
			helper.body.show();
		} else if (settings(this).showBody) {
			var parts = title.split(settings(this).showBody);
			helper.title.html(parts.shift()).show();
			helper.body.empty();
			for (var i = 0, part; (part = parts[i]); i++) {
				if (i > 0)
					helper.body.append("<br/>");
				helper.body.append(part);
			}
			helper.body.hideWhenEmpty();
		} else {
			helper.title.html(title).show();
			helper.body.hide();
		}

		// if element has href or src, add and show it, otherwise hide it
		if (settings(this).showURL && $(this).url())
			helper.url.html($(this).url().replace('http://', '')).show();
		else
			helper.url.hide();

		// add an optional class for this tip
		helper.parent.addClass(settings(this).extraClass);

		// fix PNG background for IE
		if (settings(this).fixPNG)
			helper.parent.fixPNG();

		handle.apply(this, arguments);
	}

	// delete timeout and show helper
	function show() {
		tID = null;
		if ((!IE || !$.fn.bgiframe) && settings(current).fade) {
			if (helper.parent.is(":animated"))
				helper.parent.stop().show().fadeTo(settings(current).fade, current.tOpacity);
			else
				helper.parent.is(':visible') ? helper.parent.fadeTo(settings(current).fade, current.tOpacity) : helper.parent.fadeIn(settings(current).fade);
		} else {
			helper.parent.show();
		}
		update();
	}

	/**
	* callback for mousemove
	* updates the helper position
	* removes itself when no current element
	*/
	function update(event) {
		if ($.tooltip.blocked)
			return;

		if (event && event.target.tagName == "OPTION") {
			return;
		}

		// stop updating when tracking is disabled and the tooltip is visible
		if (!track && helper.parent.is(":visible")) {
			$(document.body).unbind('mousemove', update)
		}

		// if no current element is available, remove this listener
		if (current == null) {
			$(document.body).unbind('mousemove', update);
			return;
		}

		// remove position helper classes
		helper.parent.removeClass("viewport-right").removeClass("viewport-bottom");

		var left = helper.parent[0].offsetLeft;
		var top = helper.parent[0].offsetTop;
		var currentSettings = settings(current);
		if (event && (currentSettings != undefined)) {
			// position the helper 15 pixel to bottom right, starting from mouse position
			left = event.pageX + currentSettings.left;
			top = event.pageY + currentSettings.top;
			var right = 'auto';
			if (currentSettings.positionLeft) {
				right = $(window).width() - left;
				left = 'auto';
			}
			helper.parent.css({
				left: left,
				right: right,
				top: top
			});
		}

		var v = viewport(),
			h = helper.parent[0];
		// check horizontal position
		if (v.x + v.cx < h.offsetLeft + h.offsetWidth) {
			left -= h.offsetWidth + 20 + currentSettings.left;
			helper.parent.css({ left: left + 'px' }).addClass("viewport-right");
		}
		// check vertical position
		if (v.y + v.cy < h.offsetTop + h.offsetHeight) {
			top -= h.offsetHeight + 20 + currentSettings.top;
			helper.parent.css({ top: top + 'px' }).addClass("viewport-bottom");
		}
	}

	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;

		var tsettings = settings(this);
		if (tsettings) {
			function complete() {
				helper.parent.removeClass(tsettings.extraClass).hide().css("opacity", "");
			}
			if ((!IE || !$.fn.bgiframe) && tsettings.fade) {
				if (helper.parent.is(':animated'))
					helper.parent.stop().fadeTo(tsettings.fade, 0, complete);
				else
					helper.parent.stop().fadeOut(tsettings.fade, complete);
			} else
				complete();

			if (settings(this).fixPNG) {
				helper.parent.unfixPNG();
			}
		}
	}

})(jQuery);