/* 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);