/*
 * 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;
   
   $.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, span for title, div for url
      helper.parent = $('<div id="' + settings.id + '"><span class="tooltext"></span><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 = $('span', 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;
      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");
      }
   }
   
   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);
      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);