/*!
* jQuery corner plugin: simple corner rounding
* Examples and documentation at: http://jquery.malsup.com/corner/
* version 2.03 (05-DEC-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:  $('#myDiv').corner("effect corners width")
*
*  effect:  name of the effect to apply, such as round, bevel, notch, bite, etc (default is round). 
*  corners: one or more of: top, bottom, tr, tl, br, or bl. 
*           by default, all four corners are adorned. 
*  width:   width of the effect; in the case of rounded corners this is the radius. 
*           specify this value using the px suffix such as 10px (and yes, it must be pixels).
*
* @author Dave Methvin (http://methvin.com/jquery/jq-corner.html)
* @author Mike Alsup   (http://jquery.malsup.com/corner/)
*/
;(function($) { 

var ua = navigator.userAgent;
var moz = $.browser.mozilla && /gecko/i.test(ua);
var webkit = $.browser.safari && /Safari\/[5-9]/.test(ua);

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 '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;
	}
	};
	
	$.fn.corner = function(options) {
	// in 1.3+ we can fix mistakes with the ready state
	if (this.length == 0) {
	if (!$.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);
	var o = [ options || '', $this.attr($.fn.corner.defaults.metaAttr) || ''].join(' ').toLowerCase();
	//var o = (options || $this.attr($.fn.corner.defaults.metaAttr) || '').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|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' && (moz || webkit) && !cc && !sc) {
	if (opts.TL)
	$this.css(moz ? '-moz-border-radius-topleft' : '-webkit-border-top-left-radius', width + 'px');
	if (opts.TR)
	$this.css(moz ? '-moz-border-radius-topright' : '-webkit-border-top-right-radius', width + 'px');
	if (opts.BL)
	$this.css(moz ? '-moz-border-radius-bottomleft' : '-webkit-border-bottom-left-radius', width + 'px');
	if (opts.BR)
	$this.css(moz ? '-moz-border-radius-bottomright' : '-webkit-border-bottom-right-radius', width + 'px');
	return;
	}
	
	var strip = document.createElement('div');
	strip.style.overflow = 'hidden';
	strip.style.height = '1px';
	strip.style.backgroundColor = sc || 'transparent';
	strip.style.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 = $.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.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);
					  }
					  }
					  }
					  });
					  };
					  
					  $.fn.uncorner = function() { 
					  if (moz || webkit)
					  this.css(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);