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/*

 * Supersubs v0.2b - jQuery plugin

 * Copyright (c) 2008 Joel Birch

 *

 * Dual licensed under the MIT and GPL licenses:

 *  http://www.opensource.org/licenses/mit-license.php

 *  http://www.gnu.org/licenses/gpl.html

 *

 * This plugin automatically adjusts submenu widths of suckerfish-style menus to that of

 * their longest list item children. If you use this, please expect bugs and report them

 * to the jQuery Google Group with the word 'Superfish' in the subject line.

 *

 */

/*

 * This is not the original jQuery Supersubs plugin.

 * Please refer to the README for more information.

 */

(function($){ // $ will refer to jQuery within this closure

  $.fn.supersubs = function(options){

    var opts = $.extend({}, $.fn.supersubs.defaults, options);

    // return original object to support chaining

    return this.each(function() {

      // cache selections

      var $$ = $(this);

      // support metadata

      var o = $.meta ? $.extend({}, opts, $$.data()) : opts;

      // get the font size of menu.

      // .css('fontSize') returns various results cross-browser, so measure an em dash instead

      var fontsize = $('<li id="menu-fontsize">&#8212;</li>').css({

        'padding' : 0,

        'position' : 'absolute',

        'top' : '-99999em',

        'width' : 'auto'

      }).appendTo($$).width(); //clientWidth is faster, but was incorrect here

      // remove em dash

      $('#menu-fontsize').remove();

      // Jump on level if it's a "NavBar"

      if ($$.hasClass('sf-navbar')) {

        $$ = $('li > ul', $$);

      }

      // cache all ul elements 

      $ULs = $$.find('ul:not(.sf-megamenu)');

      // loop through each ul in menu

      $ULs.each(function(i) {

        // cache this ul

        var $ul = $ULs.eq(i);

        // get all (li) children of this ul

        var $LIs = $ul.children();

        // get all anchor grand-children

        var $As = $LIs.children('a');

        // force content to one line and save current float property

        var liFloat = $LIs.css('white-space','nowrap').css('float');

        // remove width restrictions and floats so elements remain vertically stacked

        var emWidth = $ul.add($LIs).add($As).css({

          'float' : 'none',

          'width'  : 'auto'

        })

        // this ul will now be shrink-wrapped to longest li due to position:absolute

        // so save its width as ems. Clientwidth is 2 times faster than .width() - thanks Dan Switzer

        .end().end()[0].clientWidth / fontsize;

        // add more width to ensure lines don't turn over at certain sizes in various browsers

        emWidth += o.extraWidth;

        // restrict to at least minWidth and at most maxWidth

        if (emWidth > o.maxWidth)    { emWidth = o.maxWidth; }

        else if (emWidth < o.minWidth)  { emWidth = o.minWidth; }

        emWidth += 'em';

        // set ul to width in ems

        $ul.css('width',emWidth);

        // restore li floats to avoid IE bugs

        // set li width to full width of this ul

        // revert white-space to normal

        $LIs.css({

          'float' : liFloat,

          'width' : '100%',

          'white-space' : 'normal'

        })

        // update offset position of descendant ul to reflect new width of parent

        .each(function(){

          var $childUl = $('>ul',this);

          var offsetDirection = $childUl.css('left')!==undefined ? 'left' : 'right';

          $childUl.css(offsetDirection,emWidth);

        });

      });

    });

  };

  // expose defaults

  $.fn.supersubs.defaults = {

    minWidth: 9, // requires em unit.

    maxWidth: 25, // requires em unit.

    extraWidth: 0 // extra width can ensure lines don't sometimes turn over due to slight browser differences in how they round-off values

  };

})(jQuery); // plugin code ends