/*
* 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, 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");
  }

  // 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);