/**
 * 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, { position: "relative", 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) {
                                //alert(el.offsetHeight);
                                if (el.offsetHeight - bh - th >= 0) {
                                    mwc.childNodes[i].style.height = (el.offsetHeight - bh - th) + "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>\
');