/*!

* jQuery corner plugin: simple corner rounding

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

* version 2.02 (12-NOV-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'); }

        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);