/*!
* jQuery Corners 0.3
* Copyright (c) 2008 David Turnbull, Steven Wittens
* Dual licensed under the MIT (MIT-LICENSE.txt)
* and GPL (GPL-LICENSE.txt) licenses.
*/

jQuery.fn.corners = function(options) {
    var doneClass = 'rounded_by_jQuery_corners'; /* To prevent double rounding */
    var settings = parseOptions(options);
    var webkitAvailable = false;
    try {
        webkitAvailable = (document.body.style.WebkitBorderRadius !== undefined);
        /* Google Chrome corners look awful */
        var versionIndex = navigator.userAgent.indexOf('Chrome');
        if (versionIndex >= 0) webkitAvailable = false;
    } catch (err) { }
    var mozillaAvailable = false;
    try {
        mozillaAvailable = (document.body.style.MozBorderRadius !== undefined);
        /* Firefox 2 corners look worse */
        var versionIndex = navigator.userAgent.indexOf('Firefox');
        if (versionIndex >= 0 && parseInt(navigator.userAgent.substring(versionIndex + 8)) < 3) mozillaAvailable = false;
    } catch (err) { }
    return this.each(function(i, e) {
        $e = jQuery(e);
        if ($e.hasClass(doneClass)) return;
        $e.addClass(doneClass);
        var classScan = /{(.*)}/.exec(e.className);
        var s = classScan ? parseOptions(classScan[1], settings) : settings;
        var nodeName = e.nodeName.toLowerCase();
        if (nodeName == 'input') e = changeInput(e);
        if (webkitAvailable && s.webkit) roundWebkit(e, s);
        else if (mozillaAvailable && s.mozilla && (s.sizex == s.sizey)) roundMozilla(e, s);
        else {
            var bgColor = backgroundColor(e.parentNode);
            var fgColor = backgroundColor(e);
            switch (nodeName) {
                case 'a':
                case 'input':
                    roundLink(e, s, bgColor, fgColor);
                    break;
                default:
                    roundDiv(e, s, bgColor, fgColor);
                    break;
            }
        }
    });

    function roundWebkit(e, s) {
        var radius = '' + s.sizex + 'px ' + s.sizey + 'px';
        var $e = jQuery(e);
        if (s.tl) $e.css('WebkitBorderTopLeftRadius', radius);
        if (s.tr) $e.css('WebkitBorderTopRightRadius', radius);
        if (s.bl) $e.css('WebkitBorderBottomLeftRadius', radius);
        if (s.br) $e.css('WebkitBorderBottomRightRadius', radius);
    }

    function roundMozilla(e, s) {
        var radius = '' + s.sizex + 'px';
        var $e = jQuery(e);
        if (s.tl) $e.css('-moz-border-radius-topleft', radius);
        if (s.tr) $e.css('-moz-border-radius-topright', radius);
        if (s.bl) $e.css('-moz-border-radius-bottomleft', radius);
        if (s.br) $e.css('-moz-border-radius-bottomright', radius);
    }

    function roundLink(e, s, bgColor, fgColor) {
        var table = tableElement("table");
        var tbody = tableElement("tbody");
        table.appendChild(tbody);
        var tr1 = tableElement("tr");
        var td1 = tableElement("td", "top");
        tr1.appendChild(td1);
        var tr2 = tableElement("tr");
        var td2 = relocateContent(e, s, tableElement("td"));
        tr2.appendChild(td2);
        var tr3 = tableElement("tr");
        var td3 = tableElement("td", "bottom");
        tr3.appendChild(td3);
        if (s.tl || s.tr) {
            tbody.appendChild(tr1);
            addCorners(td1, s, bgColor, fgColor, true);
        }
        tbody.appendChild(tr2);
        if (s.bl || s.br) {
            tbody.appendChild(tr3);
            addCorners(td3, s, bgColor, fgColor, false);
        }
        e.appendChild(table);
        /* Clicking on $('a>table') in IE will trigger onclick but not the href  */
        if (jQuery.browser.msie) table.onclick = ieLinkBypass;
        /* Firefox 2 will render garbage unless we hide the overflow here */
        e.style.overflow = 'hidden';
    }

    function ieLinkBypass() {
        if (!this.parentNode.onclick) this.parentNode.click();
    }

    function changeInput(e) {
        var a1 = document.createElement("a");
        a1.id = e.id;
        a1.className = e.className;
        if (e.onclick) {
            a1.href = 'javascript:'
            a1.onclick = e.onclick;
        } else {
            jQuery(e).parent('form').each(function() { a1.href = this.action; });
            a1.onclick = submitForm;
        }
        var a2 = document.createTextNode(e.value);
        a1.appendChild(a2);
        e.parentNode.replaceChild(a1, e);
        return a1;
    }

    function submitForm() {
        jQuery(this).parent('form').each(function() { this.submit() });
        return false;
    }

    function roundDiv(e, s, bgColor, fgColor) {
        var div = relocateContent(e, s, document.createElement('div'));
        e.appendChild(div);
        if (s.tl || s.tr) addCorners(e, s, bgColor, fgColor, true);
        if (s.bl || s.br) addCorners(e, s, bgColor, fgColor, false);
    }

    function relocateContent(e, s, d) {
        var $e = jQuery(e);
        var c;
        while (c = e.firstChild) d.appendChild(c);
        if (e.style.height) {
            var h = parseInt($e.css('height'));
            d.style.height = h + 'px';
            h += parseInt($e.css('padding-top')) + parseInt($e.css('padding-bottom'));
            e.style.height = h + 'px';
        }
        if (e.style.width) {
            var w = parseInt($e.css('width'));
            d.style.width = w + 'px';
            w += parseInt($e.css('padding-left')) + parseInt($e.css('padding-right'));
            e.style.width = w + 'px';
        }
        d.style.paddingLeft = $e.css('padding-left');
        d.style.paddingRight = $e.css('padding-right');
        if (s.tl || s.tr) {
            d.style.paddingTop = adjustedPadding(e, s, $e.css('padding-top'), true);
        } else {
            d.style.paddingTop = $e.css('padding-top');
        }
        if (s.bl || s.br) {
            d.style.paddingBottom = adjustedPadding(e, s, $e.css('padding-bottom'), false);
        } else {
            d.style.paddingBottom = $e.css('padding-bottom');
        }
        e.style.padding = 0;
        return d;
    }

    function adjustedPadding(e, s, pad, top) {
        if (pad.indexOf("px") < 0) {
            try {
                //TODO Make this check work otherwise remove it
                console.error('%s padding not in pixels', (top ? 'top' : 'bottom'), e);
            }
            catch (err) { }
            pad = s.sizey + 'px';
        }
        pad = parseInt(pad);
        if (pad - s.sizey < 0) {
            try {
                console.error('%s padding is %ipx for %ipx corner:', (top ? 'top' : 'bottom'), pad, s.sizey, e);
            }
            catch (err) { }
            pad = s.sizey;
        }
        return pad - s.sizey + 'px';
    }

    function tableElement(kind, valign) {
        var e = document.createElement(kind)
        e.style.border = 'none';
        e.style.borderCollapse = 'collapse';
        e.style.borderSpacing = 0;
        e.style.padding = 0;
        e.style.margin = 0;
        if (valign) e.style.verticalAlign = valign;
        return e;
    }

    function backgroundColor(e) {
        try {
            var c = jQuery.css(e, "background-color");
            if (c.match(/^(transparent|rgba\(0,\s*0,\s*0,\s*0\))$/i) && e.parentNode)
                return backgroundColor(e.parentNode);
            if (c == null)
                return "#ffffff";
            if (c.indexOf("rgb") > -1)
                c = rgb2hex(c);
            if (c.length == 4)
                c = hexShort2hex(c);
            return c;
        } catch (err) {
            return "#ffffff";
        }
    }

    function hexShort2hex(c) {
        return '#' +
    c.substring(1, 2) +
    c.substring(1, 2) +
    c.substring(2, 3) +
    c.substring(2, 3) +
    c.substring(3, 4) +
    c.substring(3, 4);
    }

    function rgb2hex(c) {
        var x = 255;
        var hex = '';
        var i;
        var regexp = /([0-9]+)[, ]+([0-9]+)[, ]+([0-9]+)/;
        var array = regexp.exec(c);
        for (i = 1; i < 4; i++) hex += ('0' + parseInt(array[i]).toString(16)).slice(-2);
        return '#' + hex;
    }

    function parseOptions(options, settings) {
        var options = options || '';
        var s = { sizex: 5, sizey: 5, tl: false, tr: false, bl: false, br: false, webkit: true, mozilla: true, transparent: false };
        if (settings) {
            s.sizex = settings.sizex;
            s.sizey = settings.sizey;
            s.webkit = settings.webkit;
            s.transparent = settings.transparent;
            s.mozilla = settings.mozilla;
        }
        var sizex_set = false;
        var corner_set = false;
        jQuery.each(options.split(' '), function(idx, option) {
            option = option.toLowerCase();
            var i = parseInt(option);
            if (i > 0 && option == i + 'px') {
                s.sizey = i;
                if (!sizex_set) s.sizex = i;
                sizex_set = true;
            } else switch (option) {
                case 'no-native': s.webkit = s.mozilla = false; break;
                case 'webkit': s.webkit = true; break;
                case 'no-webkit': s.webkit = false; break;
                case 'mozilla': s.mozilla = true; break;
                case 'no-mozilla': s.mozilla = false; break;
                case 'anti-alias': s.transparent = false; break;
                case 'transparent': s.transparent = true; break;
                case 'top': corner_set = s.tl = s.tr = true; break;
                case 'right': corner_set = s.tr = s.br = true; break;
                case 'bottom': corner_set = s.bl = s.br = true; break;
                case 'left': corner_set = s.tl = s.bl = true; break;
                case 'top-left': corner_set = s.tl = true; break;
                case 'top-right': corner_set = s.tr = true; break;
                case 'bottom-left': corner_set = s.bl = true; break;
                case 'bottom-right': corner_set = s.br = true; break;
            }
        });
        if (!corner_set) {
            if (!settings) {
                s.tl = s.tr = s.bl = s.br = true;
            } else {
                s.tl = settings.tl;
                s.tr = settings.tr;
                s.bl = settings.bl;
                s.br = settings.br;
            }
        }
        return s;
    }

    function alphaBlend(a, b, alpha) {
        var ca = Array(
      parseInt('0x' + a.substring(1, 3)),
      parseInt('0x' + a.substring(3, 5)),
      parseInt('0x' + a.substring(5, 7))
    );
        var cb = Array(
      parseInt('0x' + b.substring(1, 3)),
      parseInt('0x' + b.substring(3, 5)),
      parseInt('0x' + b.substring(5, 7))
    );
        r = '0' + Math.round(ca[0] + (cb[0] - ca[0]) * alpha).toString(16);
        g = '0' + Math.round(ca[1] + (cb[1] - ca[1]) * alpha).toString(16);
        b = '0' + Math.round(ca[2] + (cb[2] - ca[2]) * alpha).toString(16);
        return '#'
      + r.substring(r.length - 2)
      + g.substring(g.length - 2)
      + b.substring(b.length - 2);
    }

    function addCorners(e, s, bgColor, fgColor, top) {
        if (s.transparent) addTransparentCorners(e, s, bgColor, top);
        else addAntiAliasedCorners(e, s, bgColor, fgColor, top);
    }

    function addAntiAliasedCorners(e, s, bgColor, fgColor, top) {
        var i, j;
        var d = document.createElement("div");
        d.style.fontSize = '1px';
        d.style.backgroundColor = bgColor;
        var lastarc = 0;
        for (i = 1; i <= s.sizey; i++) {
            var coverage, arc2, arc3;
            // Find intersection of arc with bottom of pixel row
            arc = Math.sqrt(1.0 - Math.pow(1.0 - i / s.sizey, 2)) * s.sizex;
            // Calculate how many pixels are bg, fg and blended.
            var n_bg = s.sizex - Math.ceil(arc);
            var n_fg = Math.floor(lastarc);
            var n_aa = s.sizex - n_bg - n_fg;
            // Create pixel row wrapper
            var x = document.createElement("div");
            var y = d;
            x.style.margin = "0px " + n_bg + "px";
            x.style.height = '1px';
            x.style.overflow = 'hidden';
            // Create the pixel divs for a row (at least one)
            for (j = 1; j <= n_aa; j++) {
                // Calculate coverage per pixel (approximates arc within the pixel)
                if (j == 1) {
                    if (j == n_aa) {
                        // Single pixel
                        coverage = ((arc + lastarc) * .5) - n_fg;
                    }
                    else {
                        // First in a run
                        arc2 = Math.sqrt(1.0 - Math.pow(1.0 - (n_bg + 1) / s.sizex, 2)) * s.sizey;
                        coverage = (arc2 - (s.sizey - i)) * (arc - n_fg - n_aa + 1) * .5;
                    }
                }
                else if (j == n_aa) {
                    // Last in a run
                    arc2 = Math.sqrt(1.0 - Math.pow((s.sizex - n_bg - j + 1) / s.sizex, 2)) * s.sizey;
                    coverage = 1.0 - (1.0 - (arc2 - (s.sizey - i))) * (1.0 - (lastarc - n_fg)) * .5;
                }
                else {
                    // Middle of a run
                    arc3 = Math.sqrt(1.0 - Math.pow((s.sizex - n_bg - j) / s.sizex, 2)) * s.sizey;
                    arc2 = Math.sqrt(1.0 - Math.pow((s.sizex - n_bg - j + 1) / s.sizex, 2)) * s.sizey;
                    coverage = ((arc2 + arc3) * .5) - (s.sizey - i);
                }

                addCornerDiv(s, x, y, top, alphaBlend(bgColor, fgColor, coverage));
                y = x;
                var x = y.cloneNode(false);
                x.style.margin = "0px 1px";
            }
            addCornerDiv(s, x, y, top, fgColor);
            lastarc = arc;
        }
        if (top)
            e.insertBefore(d, e.firstChild);
        else
            e.appendChild(d);
    }

    function addCornerDiv(s, x, y, top, color) {
        if (top && !s.tl) x.style.marginLeft = 0;
        if (top && !s.tr) x.style.marginRight = 0;
        if (!top && !s.bl) x.style.marginLeft = 0;
        if (!top && !s.br) x.style.marginRight = 0;
        x.style.backgroundColor = color;
        if (top)
            y.appendChild(x);
        else
            y.insertBefore(x, y.firstChild);
    }

    function addTransparentCorners(e, s, bgColor, top) {
        var d = document.createElement("div");
        d.style.fontSize = '1px';
        var strip = document.createElement('div');
        strip.style.overflow = 'hidden';
        strip.style.height = '1px';
        strip.style.borderColor = bgColor;
        strip.style.borderStyle = 'none solid';
        var sizex = s.sizex - 1;
        var sizey = s.sizey - 1;
        if (!sizey) sizey = 1; /* hint for 1x1 */
        for (var i = 0; i < s.sizey; i++) {
            var w = sizex - Math.floor(Math.sqrt(1.0 - Math.pow(1.0 - i / sizey, 2)) * sizex);
            if (i == 2 && s.sizex == 6 && s.sizey == 6) w = 2; /* hint for 6x6 */
            var x = strip.cloneNode(false);
            x.style.borderWidth = '0 ' + w + 'px';
            if (top) x.style.borderWidth = '0 ' + (s.tr ? w : 0) + 'px 0 ' + (s.tl ? w : 0) + 'px';
            else x.style.borderWidth = '0 ' + (s.br ? w : 0) + 'px 0 ' + (s.bl ? w : 0) + 'px';
            top ? d.appendChild(x) : d.insertBefore(x, d.firstChild);
        }
        if (top)
            e.insertBefore(d, e.firstChild);
        else
            e.appendChild(d);
    }


}