/*!
* jQuery corner plugin: simple corner rounding
* Examples and documentation at: http://jquery.malsup.com/corner/
* version 1.95 (02/26/2009)
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
*/

/**
*  corner() takes a single string argument:  $('#myDiv').corner("effect corners width")
*
*  effect:  name of the effect to apply, such as round, bevel, notch, bite, etc (default is round). 
*  corners: one or more of: top, bottom, tr, tl, br, or bl. 
*           by default, all four corners are adorned. 
*  width:   width of the effect; in the case of rounded corners this is the radius. 
*           specify this value using the px suffix such as 10px (and yes, it must be pixels).
*
* @name corner
* @type jQuery
* @param String options Options which control the corner style
* @cat Plugins/Corner
* @return jQuery
* @author Dave Methvin (http://methvin.com/jquery/jq-corner.html)
* @author Mike Alsup   (http://jquery.malsup.com/corner/)
*/
; (function($)
{

  var expr = (function()
  {
    var div = document.createElement('div');
    try { div.style.setExpression('width', '0+0'); }
    catch (e) { return false; }
    return true;
  })();

  function sz(el, p)
  {
    return parseInt($.css(el, p)) || 0;
  };
  function hex2(s)
  {
    var s = parseInt(s).toString(16);
    return (s.length < 2) ? '0' + s : s;
  };
  function gpc(node)
  {
    for (; node && node.nodeName.toLowerCase() != 'html'; node = node.parentNode)
    {
      var v = $.css(node, 'backgroundColor');
      if (v.indexOf('rgb') >= 0)
      {
        if ($.browser.safari && v == 'rgba(0, 0, 0, 0)')
          continue;
        var rgb = v.match(/\d+/g);
        return '#' + hex2(rgb[0]) + hex2(rgb[1]) + hex2(rgb[2]);
      }
      if (v && v != 'transparent')
        return v;
    }
    return '#ffffff';
  };

  function getWidth(fx, i, width)
  {
    switch (fx)
    {
      case 'round': return Math.round(width * (1 - Math.cos(Math.asin(i / width))));
      case 'cool': return Math.round(width * (1 + Math.cos(Math.asin(i / width))));
      case 'sharp': return Math.round(width * (1 - Math.cos(Math.acos(i / width))));
      case 'bite': return Math.round(width * (Math.cos(Math.asin((width - i - 1) / width))));
      case 'slide': return Math.round(width * (Math.atan2(i, width / i)));
      case 'jut': return Math.round(width * (Math.atan2(width, (width - i - 1))));
      case 'curl': return Math.round(width * (Math.atan(i)));
      case 'tear': return Math.round(width * (Math.cos(i)));
      case 'wicked': return Math.round(width * (Math.tan(i)));
      case 'long': return Math.round(width * (Math.sqrt(i)));
      case 'sculpt': return Math.round(width * (Math.log((width - i - 1), width)));
      case 'dog': return (i & 1) ? (i + 1) : width;
      case 'dog2': return (i & 2) ? (i + 1) : width;
      case 'dog3': return (i & 3) ? (i + 1) : width;
      case 'fray': return (i % 2) * width;
      case 'notch': return width;
      case 'bevel': return i + 1;
    }
  };

  $.fn.corner = function(o)
  {
    // in 1.3+ we can fix mistakes with the ready state
    if (this.length == 0)
    {
      if (!$.isReady && this.selector)
      {
        var s = this.selector, c = this.context;
        $(function()
        {
          $(s, c).corner(o);
        });
      }
      return this;
    }

    o = (o || "").toLowerCase();
    var keep = /keep/.test(o);                       // keep borders?
    var cc = ((o.match(/cc:(#[0-9a-f]+)/) || [])[1]);  // corner color
    var sc = ((o.match(/sc:(#[0-9a-f]+)/) || [])[1]);  // strip color
    var width = parseInt((o.match(/(\d+)px/) || [])[1]) || 10; // corner width
    var re = /round|bevel|notch|bite|cool|sharp|slide|jut|curl|tear|fray|wicked|sculpt|long|dog3|dog2|dog/;
    var fx = ((o.match(re) || ['round'])[0]);
    var edges = { T: 0, B: 1 };
    var opts = {
      TL: /top|tl/.test(o), TR: /top|tr/.test(o),
      BL: /bottom|bl/.test(o), BR: /bottom|br/.test(o)
    };
    if (!opts.TL && !opts.TR && !opts.BL && !opts.BR)
      opts = { TL: 1, TR: 1, BL: 1, BR: 1 };
    var strip = document.createElement('div');
    strip.style.overflow = 'hidden';
    strip.style.height = '1px';
    strip.style.backgroundColor = sc || 'transparent';
    strip.style.borderStyle = 'solid';
    return this.each(function(index)
    {
      var pad = {
        T: parseInt($.css(this, 'paddingTop')) || 0, R: parseInt($.css(this, 'paddingRight')) || 0,
        B: parseInt($.css(this, 'paddingBottom')) || 0, L: parseInt($.css(this, 'paddingLeft')) || 0
      };

      if (typeof this.style.zoom != undefined) this.style.zoom = 1; // force 'hasLayout' in IE
      if (!keep) this.style.border = 'none';
      strip.style.borderColor = cc || gpc(this.parentNode);
      var cssHeight = $.curCSS(this, 'height');

      for (var j in edges)
      {
        var bot = edges[j];
        // only add stips if needed
        if ((bot && (opts.BL || opts.BR)) || (!bot && (opts.TL || opts.TR)))
        {
          strip.style.borderStyle = 'none ' + (opts[j + 'R'] ? 'solid' : 'none') + ' none ' + (opts[j + 'L'] ? 'solid' : 'none');
          var d = document.createElement('div');
          $(d).addClass('jquery-corner');
          var ds = d.style;

          bot ? this.appendChild(d) : this.insertBefore(d, this.firstChild);

          if (bot && cssHeight != 'auto')
          {
            if ($.css(this, 'position') == 'static')
              this.style.position = 'relative';
            ds.position = 'absolute';
            ds.bottom = ds.left = ds.padding = ds.margin = '0';
            if (expr)
              ds.setExpression('width', 'this.parentNode.offsetWidth');
            else
              ds.width = '100%';
          }
          else if (!bot && $.browser.msie)
          {
            if ($.css(this, 'position') == 'static')
              this.style.position = 'relative';
            ds.position = 'absolute';
            ds.top = ds.left = ds.right = ds.padding = ds.margin = '0';

            // fix ie6 problem when blocked element has a border width
            if (expr)
            {
              var bw = sz(this, 'borderLeftWidth') + sz(this, 'borderRightWidth');
              ds.setExpression('width', 'this.parentNode.offsetWidth - ' + bw + '+ "px"');
            }
            else
              ds.width = '100%';
          }
          else
          {
            ds.margin = !bot ? '-' + pad.T + 'px -' + pad.R + 'px ' + (pad.T - width) + 'px -' + pad.L + 'px' :
                                        (pad.B - width) + 'px -' + pad.R + 'px -' + pad.B + 'px -' + pad.L + 'px';
          }

          for (var i = 0; i < width; i++)
          {
            var w = Math.max(0, getWidth(fx, i, width));
            var e = strip.cloneNode(false);
            e.style.borderWidth = '0 ' + (opts[j + 'R'] ? w : 0) + 'px 0 ' + (opts[j + 'L'] ? w : 0) + 'px';
            bot ? d.appendChild(e) : d.insertBefore(e, d.firstChild);
          }
        }
      }
    });
  };

  $.fn.uncorner = function() { return $('.jquery-corner', this).remove(); };

})(jQuery);