/*!

/*
 * Prototype/Scriptaculous corner plugin version 0.5 (02-NOV-2009)
 *
 * Based on: jQuery corner plugin: simple corner rounding
 * Examples and documentation at: http://jquery.malsup.com/corner/
 * version 2.01 (08-SEP-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/)
 */
 



// expose options
var 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
};
 
 
Effect.Corner = Class.create();
Object.extend(Object.extend(Effect.Corner.prototype, Effect.Base.prototype), {
sz: function (el, p) { 
    return parseInt($.css(el,p))||0; 
},
hex2: function (s) {
    var s = parseInt(s).toString(16);
    return ( s.length < 2 ) ? '0'+s : s;
},
gpc: function (node) {
    for ( ; node && node.nodeName.toLowerCase() != 'html'; node = node.parentNode ) {
        //var v = $.css(node,'backgroundColor');
		var v = Element.getStyle(node, 'backgroundColor');

        if (v == 'rgba(0, 0, 0, 0)')
            continue; // webkit
        if (v.indexOf('rgb') >= 0) { 
            var rgb = v.match(/\d+/g); 
            return '#'+ this.hex2(rgb[0]) + this.hex2(rgb[1]) + this.hex2(rgb[2]);
        }
        if ( v && v != 'transparent' )
            return v;
    }
    return '#ffffff';
},

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

    // 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;
	}
        //var o = (options||"").toLowerCase();
        var o = (options || element.getAttribute(defaults.metaAttr) || '');
        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
		this.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/;
		this.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 for moz & webkit
		if (defaults.useNative && this.fx == 'round' && (moz || webkit) && !cc && !sc) {
		    var bRadius=this.width + 'px';
			if (opts.TL)
				element.setStyle({ MozBorderRadiusTopleft: bRadius, WebkitBorderRadiusTopleft: bRadius });
			if (opts.TR)
			    element.setStyle({ MozBorderRadiusTopright: bRadius, WebkitBorderRadiusTopright: bRadius });
			if (opts.BL)
			    element.setStyle({ MozBorderRadiusBottomleft: bRadius, WebkitBorderRadiusBottomleft: bRadius });
			if (opts.BR)
			    element.setStyle({ MozBorderRadiusBottomright: bRadius, WebkitBorderRadiusBottomright: bRadius });
			return;
		}
	    var expr = Prototype.Browser.IE && (function() {
            var div = document.createElement('div');
            try { div.style.setExpression('width','0+0'); }
            catch(e) { return false; }
            return true;
        })();
        
		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(Element.getStyle(element,'paddingTop'))||0,     R: parseInt(Element.getStyle(element,'paddingRight'))||0,
            B: parseInt(Element.getStyle(element,'paddingBottom'))||0,  L: parseInt(Element.getStyle(element,'paddingLeft'))||0
        };

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

        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');
                var ds = d.style;

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

                if (bot && cssHeight != 'auto') {
                    if (Element.getStyle(element,'position') == 'static')
                        element.style.position = 'relative';
                    ds.position = 'absolute';
                    ds.bottom = ds.left = ds.padding = ds.margin = '0';
                    if (expr)
                        ds.setExpression('width', 'element.parentNode.offsetWidth');
                    else
                        ds.width = '100%';
                }
                else if (!bot && Prototype.Browser.msie) {
                    if (Element.getStyle(element,'position') == 'static')
                        element.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 = this.sz(element,'borderLeftWidth') + this.sz(element,'borderRightWidth');
                        ds.setExpression('width', 'element.parentNode.offsetWidth - '+bw+'+ "px"');
                    }
                    else
                        ds.width = '100%';
                }
                else {
                	ds.position = 'relative';
                    ds.margin = !bot ? '-'+pad.T+'px -'+pad.R+'px '+(pad.T-this.width)+'px -'+pad.L+'px' : 
                                        (pad.B-this.width)+'px -'+pad.R+'px -'+pad.B+'px -'+pad.L+'px';                
                }

                for (var i=0; i < this.width; i++) {
                    var w = Math.max(0,this.getWidth(this.fx,i, this.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);
                }
            }
        
    }
}
    
});