/*!

 * jQuery corner plugin: simple corner rounding

 * Examples and documentation at: http://jquery.malsup.com/corner/

 * version 2.11 (15-JUN-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,

    moz = style['MozBorderRadius'] !== undefined,

    webkit = style['WebkitBorderRadius'] !== undefined,

    radius = style['borderRadius'] !== undefined || style['BorderRadius'] !== undefined,

    mode = document.documentMode || 0,

    noBottomFold = $.browser.msie && (($.browser.version < 8 && !mode) || mode < 8),

    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;

    })();

$.support = $.support || {};

$.support.borderRadius = moz || webkit || radius; // so you can do:  if (!$.support.borderRadius) $('#myDiv').corner();

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) {

    while(node) {

        var v = $.css(node,'backgroundColor'), rgb;

        if (v && v != 'transparent' && v != 'rgba(0, 0, 0, 0)') {

            if (v.indexOf('rgb') >= 0) {

                rgb = v.match(/\d+/g);

                return '#'+ hex2(rgb[0]) + hex2(rgb[1]) + hex2(rgb[2]);

            }

            return v;

        }

        if (node.nodeName.toLowerCase() == 'html')

            break;

        node = node.parentNode; // keep walking if transparent

    }

    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

            o = [$this.attr($.fn.corner.defaults.metaAttr) || '', options || ''].join(' ').toLowerCase(),

            keep = /keep/.test(o),                       // keep borders?

            cc = ((o.match(/cc:(#[0-9a-f]+)/)||[])[1]),  // corner color

            sc = ((o.match(/sc:(#[0-9a-f]+)/)||[])[1]),  // strip color

            width = parseInt((o.match(/(\d+)px/)||[])[1]) || 10, // corner width

            re = /round|bevelfold|bevel|notch|bite|cool|sharp|slide|jut|curl|tear|fray|wicked|sculpt|long|dog3|dog2|dogfold|dog/,

            fx = ((o.match(re)||['round'])[0]),

            fold = /dogfold|bevelfold/.test(o),

            edges = { T:0, B:1 },

            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)

            },

            // vars used in func later

            strip, pad, cssHeight, j, bot, d, ds, bw, i, w, e, c, common, $horz;

        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;

        }

        strip = document.createElement('div');

        $(strip).css({

            overflow: 'hidden',

            height: '1px',

            minHeight: '1px',

            fontSize: '1px',

            backgroundColor: sc || 'transparent',

            borderStyle: 'solid'

        });

        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);

        cssHeight = $(this).outerHeight();

        for (j in edges) {

            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');

                d = document.createElement('div');

                $(d).addClass('jquery-corner');

                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) {

                        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 (i=0; i < width; i++) {

                    w = Math.max(0,getWidth(fx,i, width));

                    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 (c in opts) {

                        if (!opts[c]) continue;

                        if (bot && (c == 'TL' || c == 'TR')) continue;

                        if (!bot && (c == 'BL' || c == 'BR')) continue;

                        common = { position: 'absolute', border: 'none', margin: 0, padding: 0, overflow: 'hidden', backgroundColor: strip.style.borderColor };

                        $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);