/*!
 * jquery corner plugin: simple corner rounding
 * examples and documentation at: http://jquery.malsup.com/corner/
 * version 2.12 (23-may-2011)
 * 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) {
    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 width-i;
    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;
    case 'steep':  return i/2 + 1;
    case 'invsteep':return (width-i)/2+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|invsteep|steep/,
            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);