/*!
* jQuery corner plugin: simple corner rounding
* Examples and documentation at: http://jquery.malsup.com/corner/
* version 2.08 (02-MAR-2010)
* Requires jQuery v1.3.2 or later
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
* Authors: Dave Methvin and Mike Alsup
*/

/**
*  corner() takes a single string argument:  $('#myDiv').corner("effect corners width")
*
*  effect:  name of the effect to apply, such as round, bevel, notch, bite, etc (default is round). 
*  corners: one or more of: top, bottom, tr, tl, br, or bl.  (default is all corners)
*  width:   width of the effect; in the case of rounded corners this is the radius. 
*           specify this value using the px suffix such as 10px (yes, it must be pixels).
*/
; (function($) {

  var style = document.createElement('div').style;
  var moz = style['MozBorderRadius'] !== undefined;
  var webkit = style['WebkitBorderRadius'] !== undefined;
  var radius = style['borderRadius'] !== undefined || style['BorderRadius'] !== undefined;
  var mode = document.documentMode || 0;
  var noBottomFold = $.browser.msie && (($.browser.version < 8 && !mode) || mode < 8);

  var expr = $.browser.msie && (function() {
    var div = document.createElement('div');
    try { div.style.setExpression('width', '0+0'); div.style.removeExpression('width'); }
    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 'dogfold':
      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 'bevelfold':
      case 'bevel': return i + 1;
    }
  };

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

    return this.each(function(index) {
      var $this = $(this);
      // meta values override options
      var o = [$this.attr($.fn.corner.defaults.metaAttr) || '', options || ''].join(' ').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|bevelfold|bevel|notch|bite|cool|sharp|slide|jut|curl|tear|fray|wicked|sculpt|long|dog3|dog2|dogfold|dog/;
      var fx = ((o.match(re) || ['round'])[0]);
      var fold = /dogfold|bevelfold/.test(o);
      var edges = { T: 0, B: 1 };
      var opts = {
        TL: /top|tl|left/.test(o), TR: /top|tr|right/.test(o),
        BL: /bottom|bl|left/.test(o), BR: /bottom|br|right/.test(o)
      };
      if (!opts.TL && !opts.TR && !opts.BL && !opts.BR)
        opts = { TL: 1, TR: 1, BL: 1, BR: 1 };

      // support native rounding
      if ($.fn.corner.defaults.useNative && fx == 'round' && (radius || moz || webkit) && !cc && !sc) {
        if (opts.TL)
          $this.css(radius ? 'border-top-left-radius' : moz ? '-moz-border-radius-topleft' : '-webkit-border-top-left-radius', width + 'px');
        if (opts.TR)
          $this.css(radius ? 'border-top-right-radius' : moz ? '-moz-border-radius-topright' : '-webkit-border-top-right-radius', width + 'px');
        if (opts.BL)
          $this.css(radius ? 'border-bottom-left-radius' : moz ? '-moz-border-radius-bottomleft' : '-webkit-border-bottom-left-radius', width + 'px');
        if (opts.BR)
          $this.css(radius ? 'border-bottom-right-radius' : moz ? '-moz-border-radius-bottomright' : '-webkit-border-bottom-right-radius', width + 'px');
        return;
      }

      var strip = document.createElement('div');
      $(strip).css({
        overflow: 'hidden',
        height: '1px',
        minHeight: '1px',
        fontSize: '1px',
        backgroundColor: sc || 'transparent',
        borderStyle: 'solid'
      });

      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 = $(this).outerHeight();

      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.position = 'relative';
            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);
          }

          if (fold && $.support.boxModel) {
            if (bot && noBottomFold) continue;
            for (var c in opts) {
              if (!opts[c]) continue;
              if (bot && (c == 'TL' || c == 'TR')) continue;
              if (!bot && (c == 'BL' || c == 'BR')) continue;

              var common = { position: 'absolute', border: 'none', margin: 0, padding: 0, overflow: 'hidden', backgroundColor: strip.style.borderColor };
              var $horz = $('<div/>').css(common).css({ width: width + 'px', height: '1px' });
              switch (c) {
                case 'TL': $horz.css({ bottom: 0, left: 0 }); break;
                case 'TR': $horz.css({ bottom: 0, right: 0 }); break;
                case 'BL': $horz.css({ top: 0, left: 0 }); break;
                case 'BR': $horz.css({ top: 0, right: 0 }); break;
              }
              d.appendChild($horz[0]);

              var $vert = $('<div/>').css(common).css({ top: 0, bottom: 0, width: '1px', height: width + 'px' });
              switch (c) {
                case 'TL': $vert.css({ left: width }); break;
                case 'TR': $vert.css({ right: width }); break;
                case 'BL': $vert.css({ left: width }); break;
                case 'BR': $vert.css({ right: width }); break;
              }
              d.appendChild($vert[0]);
            }
          }
        }
      }
    });
  };

  $.fn.uncorner = function() {
    if (radius || moz || webkit)
      this.css(radius ? 'border-radius' : moz ? '-moz-border-radius' : '-webkit-border-radius', 0);
    $('div.jquery-corner', this).remove();
    return this;
  };

  // expose options
  $.fn.corner.defaults = {
    useNative: true, // true if plugin should attempt to use native browser support for border radius rounding
    metaAttr: 'data-corner' // name of meta attribute to use for options
  };

})(jQuery);