/**
 * RUZEE.ShadedBorder 0.6.2
 * (c) 2006 Steffen Rusitschka
 *
 * RUZEE.ShadedBorder is freely distributable under the terms of an MIT-style license.
 * For details, see http://www.ruzee.com/
 */

var RUZEE = window.RUZEE || {};

RUZEE.ShadedBorder = {

    create: function(opts) {
        var isie = /msie/i.test(navigator.userAgent) && !window.opera;
        var isie6 = isie && !window.XMLHttpRequest;
        function sty(el, h) {
            for(k in h) {
                if (/ie_/.test(k)) {
                    if (isie) el.style[k.substr(3)]=h[k];
                } else el.style[k]=h[k];
            }
        }
        function crdiv(h) {
            var el=document.createElement("div");
            el.className = "sb-gen";
            sty(el, h);
            return el;
        }
        function op(v) {
            v = v<0 ? 0 : v;
            if (v>0.99999) return "";
            return isie ? " filter:alpha(opacity=" + (v*100) + ");" : " opacity:" + v + ';';
        }

        var sr = opts.shadow || 0;
        var r = opts.corner || 0;
        var bor = 0;
        var bow = opts.border || 0;
        var boo = opts.borderOpacity || 1;
        var shadow = sr != 0;
        var lw = r > sr ? r : sr;
        var rw = lw;
        var th = lw;
        var bh = lw;
        if (bow > 0) {
            bor = r;
            r = r - bow;
        }
        var cx = r != 0 && shadow ? Math.round(lw/3) : 0;
        var cy = cx;
        var cs = Math.round(cx/2);
        var iclass = r > 0 ? "sb-inner" : "sb-shadow";
        var sclass = "sb-shadow";
        var bclass = "sb-border";
        var edges = opts.edges || "trlb";
        if (!/t/i.test(edges)) th=0;
        if (!/b/i.test(edges)) bh=0;
        if (!/l/i.test(edges)) lw=0;
        if (!/r/i.test(edges)) rw=0;

        var p = {
            position:"absolute",
            left:"0",
            top:"0",
            width:lw + "px",
            height:th + "px",
            ie_fontSize:"1px", 
            overflow:"hidden",
            margin:"0",
            padding:"0"
        }; var tl = crdiv(p);
        delete p.left; p.right="0"; p.width=rw + "px"; var tr = crdiv(p);
        delete p.top; p.bottom="0"; p.height=bh + "px"; var br = crdiv(p);
        delete p.right; p.left="0"; p.width=lw + "px"; var bl = crdiv(p);

        var tw = crdiv({
            position:"absolute",
            width:"100%",
            height:th + "px",
            ie_fontSize:"1px",
            top:"0",
            left:"0",
            overflow:"hidden",
            margin:"0",
            padding:"0"
        });
        var t = crdiv({
            position:"relative",
            height:th + "px",
            ie_fontSize:"1px",
            margin:"0 "+ rw + "px 0 " + lw + "px",
            overflow:"hidden",
            padding:"0"
        });
        tw.appendChild(t);

        var bw = crdiv({
            position:"absolute",
            left:"0",
            bottom:"0",
            width:"100%",
            height:bh + "px",
            ie_fontSize:"1px",
            overflow:"hidden",
            margin:"0",
            padding:"0"
        });
                   
        var b = crdiv({
            position:"relative",
            height:bh + "px",
            ie_fontSize:"1px",
            margin:"0 "+ rw + "px 0 " + lw + "px",
            overflow:"hidden",
            padding:"0"
        });
                  
        bw.appendChild(b);

        var mw = crdiv({
            position:"absolute",
            top:(-bh)+"px",
            left:"0",
            width:"100%",
            height:"100%",
            overflow:"hidden",
            ie_fontSize:"1px",
            padding:"0",
            margin:"0"
        });

        function corner(el,t,l) {
            var w = l ? lw : rw;
            var h = t ? th : bh;
            var s = t ? cs : -cs;
            var dsb = []; var dsi = []; var dss = [];
    
            var xp=0; var xd=1; if (l) {
                xp=w-1; xd=-1;
            }
            for (var x=0; x<w; ++x) {
                var yp=h-1; var yd=-1; if (t) {
                    yp=0; yd=1;
                }
                var finished=false;
                for (var y=h-1; y>=0 && !finished; --y) {
                    var div = '<div style="position:absolute; top:' + yp + 'px; left:' + xp + 'px; ' +
                    'width:1px; height:1px; overflow:hidden; margin:0; padding:0;';

                    var xc = x - cx; var yc = y - cy - s;
                    var d = Math.sqrt(xc*xc+yc*yc);
                    var doShadow = false;

                    if (r > 0) {
                        // draw border
                        if (xc < 0 && yc < bor && yc >= r || yc < 0 && xc < bor && xc >= r) {
                            dsb.push(div + op(boo) + '" class="' + bclass + '"></div>');
                        } else
                        if (d<bor && d>=r-1 && xc>=0 && yc>=0) {
                            var dd = div;
                            if (d>=bor-1) {
                                dd += op((bor-d)*boo);
                                doShadow = true;
                            } else dd += op(boo);
                            dsb.push(dd + '" class="' + bclass + '"></div>');
                        }
          
                        // draw inner
                        var dd = div + ' z-index:2;' + (t ? 'background-position:0 -' + (r-yc-1) + 'px;' : 'background-image:none;');
                        var finish = function() {
                            if (!t) dd = dd.replace(/top\:\d+px/, "top:0px");
                            dd = dd.replace(/height\:1px/, "height:" + (y+1) + "px");
                            dsi.push(dd + '" class="' + iclass + '"></div>');
                            finished = true;
                        };
                        if (xc < 0 && yc < r || yc < 0 && xc < r) {
                            finish();
                        } else
                        if (d<r && xc>=0 && yc>=0) {
                            if (d>=r-1) {
                                dd += op(r-d);
                                doShadow = true;
                                dsi.push(dd + '" class="' + iclass + '"></div>');
                            } else {
                                finish();
                            }
                        } else doShadow = true;
                    } else doShadow = true;
        
                    // draw shadow
                    if (sr > 0 && doShadow) {
                        d = Math.sqrt(x*x+y*y);
                        if (d<sr) {
                            dss.push(div + ' z-index:0; ' + op(1-(d/sr)) + '" class="' + sclass + '"></div>');
                        }
                    }
                    yp += yd;
                }
                xp += xd;
            }
            el.innerHTML = dss.concat(dsb.concat(dsi)).join('');
        }
  
        function mid(mw) {
            var ds = [];

            ds.push('<div style="position:relative; top:' + (th+bh) + 'px; height:2048px; ' +
                ' margin:0 ' + (rw-r-cx) + 'px 0 ' + (lw-r-cx) + 'px; ' +
                ' padding:0; overflow:hidden;' +
                ' background-position:0 ' + (th > 0 ? -(r+cy+cs) : '0') + 'px;"' +
                ' class="' + iclass + '"></div>');

            var dd = '<div style="position:absolute; width:1px;' +
            ' top:' + (th+bh) + 'px; height:2048px; padding:0; margin:0;';
            if (sr>0) {
                for (var x=0; x<lw-r-cx; ++x) {
                    ds.push(dd + ' left:' + x + 'px;' + op((x+1.0)/lw) +
                        '" class="' + sclass + '"></div>');
                }

                for (var x=0; x<rw-r-cx; ++x) {
                    ds.push(dd + ' right:' + x + 'px;' + op((x+1.0)/rw) +
                        '" class="' + sclass + '"></div>');
                }
            }

            if (bow > 0) {
                var su = ' width:' + bow + 'px;' + op(boo) + '" class="' + bclass + '"></div>';
                ds.push(dd + ' left:' + (lw-bor-cx) + 'px;' + su);
                ds.push(dd + ' right:' + (rw-bor-cx) + 'px;' + su);
            }

            mw.innerHTML = ds.join('');
        }

        function tb(el, t) {
            var ds = [];
            var h = t ? th : bh;
            var dd = '<div style="height:1px; overflow:hidden; position:absolute; margin:0; padding:0;' +
            ' width:100%; left:0px; ';
            var s = t ? cs : -cs;
            for (var y=0; y<h-s-cy-r; ++y) {
                if (sr>0) ds.push(dd + (t ? 'top:' : 'bottom:') + y + 'px;' + op((y+1)*1.0/h) +
                    '" class="' + sclass + '"></div>');
            }
            if (y >= bow) {
                ds.push(dd + (t ? 'top:' : 'bottom:') + (y - bow) + 'px;' + op(boo) +
                    ' height:' + bow + 'px;" class="' + bclass + '"></div>');
            }

            ds.push(dd + (t ? 'background-position-y:0; top:' :
                'background-image:none; bottom:') + y + 'px;' +
            ' height:' + (r+cy+s) + 'px;" class="' + iclass + '"></div>');

            el.innerHTML = ds.join('');
        }

        corner(tl, true, true); corner(tr, true, false);
        corner(bl, false, true); corner(br, false, false);
        mid(mw); tb(t, true); tb(b, false);
        needsCloning = false;

        return {
            render: function(el) {
                if (typeof el == 'string') el = document.getElementById(el);
                if (el.length != undefined) {
                    for (var i=0; i<el.length; ++i) this.render(el[i]);
                    return;
                }
                el.className += " sb";
                sty(el, {
                    background:"transparent"
                });

                // remove generated children
                var node = el.firstChild;
                while (node) {
                    var nextNode = node.nextSibling;
                    if (node.nodeType == 1 && node.className == 'sb-gen')
                        el.removeChild(node);
                    node = nextNode;
                }

                var iel = el.firstChild;

                var twc = needsCloning ? tw.cloneNode(true) : tw;
                var mwc = needsCloning ? mw.cloneNode(true) : mw;
                var bwc = needsCloning ? bw.cloneNode(true) : bw;
                var tlc = needsCloning ? tl.cloneNode(true) : tl;
                var trc = needsCloning ? tr.cloneNode(true) : tr;
                var blc = needsCloning ? bl.cloneNode(true) : bl;
                var brc = needsCloning ? br.cloneNode(true) : br;
      
                el.insertBefore(tlc, iel); el.insertBefore(trc, iel);
                el.insertBefore(blc, iel); el.insertBefore(brc, iel);
                el.insertBefore(twc, iel); el.insertBefore(mwc, iel);
                el.insertBefore(bwc, iel);

                if (isie6) {
                    el.onmouseover=function() {
                        this.className += " hover";
                    }
                    el.onmouseout=function() {
                        this.className = this.className.replace(/ hover/,"");
                    }
                }
                if (isie) {
                    function resize() {
                        twc.style.width = bwc.style.width = mwc.style.width = el.offsetWidth + "px";
                        if (isie6) {
                            mwc.firstChild.style.height = el.offsetHeight + "px";
                        } else {
                            for (var i=0; i<mwc.childNodes.length; ++i) {
                                //mwc.childNodes[i].style.height = (el.offsetHeight - bh - th)  + "px";
                                var sum = el.offsetHeight - bh - th;
                                mwc.childNodes[i].style.height = (sum < 0 ? 0 : sum) + "px";
                            }
                        }
                        trc.style.right = brc.style.right = null;
                        trc.style.left  = brc.style.left  = (el.offsetWidth - rw) + "px";
                    }
                    el.onresize=resize;
                    resize();
                }
                needsCloning = true;
            }
        };
    }
}

// add our styles to the document
document.write('\
  <style type="text/css">\
  .sb, .sbi, .sb *, .sbi * { position:relative; z-index:1; }\
  * html .sb, * html .sbi { height:1%; }\
  .sbi { display:inline-block; }\
  .sb-inner { background:#ddd; }\
  .sb-shadow { background:#000; }\
  .sb-border { background:#bbb; }\
  </style>\
');