/*
 * 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
 */

;(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,

		createHelper = function(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="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);
		},

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

		// delete timeout and show helper
		show = function() {
			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();
		},

		// main event handler to start showing tooltips
		handle = function(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
		save = function() {
			// 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);
		},

		/**
		 * callback for mousemove
		 * updates the helper position
		 * removes itself when no current element
		 */
		update = function(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;
			if (event) {
				// position the helper 15 pixel to bottom right, starting from mouse position
				left = event.pageX + settings(current).left;
				top = event.pageY + settings(current).top;
				var right='auto';
				if (settings(current).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 + settings(current).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 + settings(current).top;
				helper.parent.css({top: top + 'px'}).addClass("viewport-bottom");
			}
		},

		viewport = function() {
			return {
				x: $(window).scrollLeft(),
				y: $(window).scrollTop(),
				cx: $(window).width(),
				cy: $(window).height()
			};
		},

		// hide helper and restore added classes and the title
		hide = function(event) {
			if($.tooltip.blocked)
				return;
			// clear timeout if possible
			if(tID)
				clearTimeout(tID);
			// no more current element
			current = null;

			var tsettings = settings(this);
			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();
		};

	$.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');
		}
	});
})(jQuery);
