/* Copyright (c) 2006 Brandon Aaron (http://brandonaaron.net)
  * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
  * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
  *
  * $LastChangedDate: 2007-07-21 18:44:59 -0500 (Sat, 21 Jul 2007) $
  * $Rev: 2446 $
  *
  * Version 2.1.1
  */

(function($){

 /**
  * The bgiframe is chainable and applies the iframe hack to get
  * around zIndex issues in IE6. It will only apply itself in IE6
  * and adds a class to the iframe called 'bgiframe'. The iframe
  * is appeneded as the first child of the matched element(s)
  * with a tabIndex and zIndex of -1.
  *
  * By default the plugin will take borders, sized with pixel units,
  * into account. If a different unit is used for the border's width,
  * then you will need to use the top and left settings as explained below.
  *
  * NOTICE: This plugin has been reported to cause perfromance problems
  * when used on elements that change properties (like width, height and
  * opacity) a lot in IE6. Most of these problems have been caused by
  * the expressions used to calculate the elements width, height and
  * borders. Some have reported it is due to the opacity filter. All
  * these settings can be changed if needed as explained below.
  *
  * @example $('div').bgiframe();
  * @before <div><p>Paragraph</p></div>
  * @result <div><iframe class="bgiframe".../><p>Paragraph</p></div>
  *
  * @param Map settings Optional settings to configure the iframe.
  * @option String|Number top The iframe must be offset to the top
  * 		by the width of the top border. This should be a negative
  *      number representing the border-top-width. If a number is
  * 		is used here, pixels will be assumed. Otherwise, be sure
  *		to specify a unit. An expression could also be used.
  * 		By default the value is "auto" which will use an expression
  * 		to get the border-top-width if it is in pixels.
  * @option String|Number left The iframe must be offset to the left
  * 		by the width of the left border. This should be a negative
  *      number representing the border-left-width. If a number is
  * 		is used here, pixels will be assumed. Otherwise, be sure
  *		to specify a unit. An expression could also be used.
  * 		By default the value is "auto" which will use an expression
  * 		to get the border-left-width if it is in pixels.
  * @option String|Number width This is the width of the iframe. If
  *		a number is used here, pixels will be assume. Otherwise, be sure
  * 		to specify a unit. An experssion could also be used.
  *		By default the value is "auto" which will use an experssion
  * 		to get the offsetWidth.
  * @option String|Number height This is the height of the iframe. If
  *		a number is used here, pixels will be assume. Otherwise, be sure
  * 		to specify a unit. An experssion could also be used.
  *		By default the value is "auto" which will use an experssion
  * 		to get the offsetHeight.
  * @option Boolean opacity This is a boolean representing whether or not
  * 		to use opacity. If set to true, the opacity of 0 is applied. If
  *		set to false, the opacity filter is not applied. Default: true.
  * @option String src This setting is provided so that one could change
  *		the src of the iframe to whatever they need.
  *		Default: "javascript:false;"
  *
  * @name bgiframe
  * @type jQuery
  * @cat Plugins/bgiframe
  * @author Brandon Aaron (brandon.aaron@gmail.com || http://brandonaaron.net)
  */
 $.fn.bgIframe = $.fn.bgiframe = function(s) {
  // This is only for IE6
  if ( $.browser.msie && /6.0/.test(navigator.userAgent) ) {
   s = $.extend({
    top     : 'auto', // auto == .currentStyle.borderTopWidth
    left    : 'auto', // auto == .currentStyle.borderLeftWidth
    width   : 'auto', // auto == offsetWidth
    height  : 'auto', // auto == offsetHeight
    opacity : true,
    src     : 'javascript:false;'
   }, s || {});
   var prop = function(n){return n&&n.constructor==Number?n+'px':n;},
       html = '<iframe class="bgiframe"frameborder="0"tabindex="-1"src="'+s.src+'"'+
                  'style="display:block;position:absolute;z-index:-1;'+
                   (s.opacity !== false?'filter:Alpha(Opacity=\'0\');':'')+
             'top:'+(s.top=='auto'?'expression(((parseInt(this.parentNode.currentStyle.borderTopWidth)||0)*-1)+\'px\')':prop(s.top))+';'+
             'left:'+(s.left=='auto'?'expression(((parseInt(this.parentNode.currentStyle.borderLeftWidth)||0)*-1)+\'px\')':prop(s.left))+';'+
             'width:'+(s.width=='auto'?'expression(this.parentNode.offsetWidth+\'px\')':prop(s.width))+';'+
             'height:'+(s.height=='auto'?'expression(this.parentNode.offsetHeight+\'px\')':prop(s.height))+';'+
      '"/>';
   return this.each(function() {
    if ( $('> iframe.bgiframe', this).length == 0 )
     this.insertBefore( document.createElement(html), this.firstChild );
   });
  }
  return this;
 };

})(jQuery);

(function($){
 /* hoverIntent by Brian Cherne */
 $.fn.hoverIntent = function(f,g) {
  // default configuration options
  var cfg = {
   sensitivity: 7,
   interval: 100,
   timeout: 0
  };
  // override configuration options with user supplied object
  cfg = $.extend(cfg, g ? { over: f, out: g } : f );

  // instantiate variables
  // cX, cY = current X and Y position of mouse, updated by mousemove event
  // pX, pY = previous X and Y position of mouse, set by mouseover and polling interval
  var cX, cY, pX, pY;

  // A private function for getting mouse position
  var track = function(ev) {
   cX = ev.pageX;
   cY = ev.pageY;
  };

  // A private function for comparing current and previous mouse position
  var compare = function(ev,ob) {
   ob.hoverIntent_t = clearTimeout(ob.hoverIntent_t);
   // compare mouse positions to see if they've crossed the threshold
   if ( ( Math.abs(pX-cX) + Math.abs(pY-cY) ) < cfg.sensitivity ) {
    $(ob).unbind("mousemove",track);
    // set hoverIntent state to true (so mouseOut can be called)
    ob.hoverIntent_s = 1;
    return cfg.over.apply(ob,[ev]);
   } else {
    // set previous coordinates for next time
    pX = cX; pY = cY;
    // use self-calling timeout, guarantees intervals are spaced out properly (avoids JavaScript timer bugs)
    ob.hoverIntent_t = setTimeout( function(){compare(ev, ob);} , cfg.interval );
   }
  };

  // A private function for delaying the mouseOut function
  var delay = function(ev,ob) {
   ob.hoverIntent_t = clearTimeout(ob.hoverIntent_t);
   ob.hoverIntent_s = 0;
   return cfg.out.apply(ob,[ev]);
  };

  // A private function for handling mouse 'hovering'
  var handleHover = function(e) {
   // next three lines copied from jQuery.hover, ignore children onMouseOver/onMouseOut
   var p = (e.type == "mouseover" ? e.fromElement : e.toElement) || e.relatedTarget;
   while ( p && p != this ) { try { p = p.parentNode; } catch(e) { p = this; } }
   if ( p == this ) { return false; }

   // copy objects to be passed into t (required for event object to be passed in IE)
   var ev = jQuery.extend({},e);
   var ob = this;

   // cancel hoverIntent timer if it exists
   if (ob.hoverIntent_t) { ob.hoverIntent_t = clearTimeout(ob.hoverIntent_t); }

   // else e.type == "onmouseover"
   if (e.type == "mouseover") {
    // set "previous" X and Y position based on initial entry point
    pX = ev.pageX; pY = ev.pageY;
    // update "current" X and Y position based on mousemove
    $(ob).bind("mousemove",track);
    // start polling interval (self-calling timeout) to compare mouse coordinates over time
    if (ob.hoverIntent_s != 1) { ob.hoverIntent_t = setTimeout( function(){compare(ev,ob);} , cfg.interval );}

   // else e.type == "onmouseout"
   } else {
    // unbind expensive mousemove event
    $(ob).unbind("mousemove",track);
    // if hoverIntent state is true, then call the mouseOut function after the specified delay
    if (ob.hoverIntent_s == 1) { ob.hoverIntent_t = setTimeout( function(){delay(ev,ob);} , cfg.timeout );}
   }
  };

  // bind the function to the two event listeners
  return this.mouseover(handleHover).mouseout(handleHover);
 };

})(jQuery);