/*!
* jQuery corner plugin: simple corner rounding
* Examples and documentation at: http://jquery.malsup.com/corner/
* version 1.98 (02-JUN-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() {
    if (! $.browser.msie) return false;
    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 == 'rgba(0, 0, 0, 0)')
        continue; // webkit
        if (v.indexOf('rgb') >= 0) {
          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() {
      $('div.jquery-corner', this).remove();
      return this;
    };

    })(jQuery);