/*
 * jQuery Tooltip plugin 1.2
 *
 * http://bassistance.de/jquery-plugins/jquery-plugin-tooltip/
 * http://docs.jquery.com/Plugins/Tooltip
 *
 * Copyright (c) 2006 - 2008 Jörn Zaefferer
 *
 * $Id: jquery.tooltip.js 4569 2008-01-31 19:36:35Z 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;
 
 $.tooltip = {
 blocked: false,
 defaults: {
 delay: 200,
 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", settings);
 // 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 = "";
 })
 .hover(save, 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="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-settings");
 }
 
 // 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;
 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")) {
 $(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;
 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 + 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");
 }
 }
 
 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( settings(this).extraClass );
 
 if( settings(this).fixPNG )
 helper.parent.unfixPNG();
 }
 
 $.fn.Tooltip = $.fn.tooltip;
 
})(jQuery);