Xmas - Feel Christmas on every website

xmas.js

var walker = document.createTreeWalker(document.body, NodeFilter.SHOW_TEXT);
var buf = [];
while(walker.nextNode()) {
    var src = walker.currentNode;
    if (! src) continue;
    var text = src.data;
    if (! text.length) continue;
    text = text.replace(/[\s\r\n\t]+/g, '');
    if (text.length < 1) continue;
    if (! src.parentNode) continue;
    var tag = src.parentNode.tagName;
    if (tag.toUpperCase() == 'SCRIPT') continue;
    if (tag.toUpperCase() == 'STYLE') continue;
    var cls = src.parentNode.getAttribute('class');
    if (cls == 'xmas-red') continue;
    if (cls == 'xmas-green') continue;
    buf.push(src);
}

var cnt = 0;
var loop;
loop = function () {
    for(var j=0; j<10; j++) {
        var src = buf.shift();
        if (! src) return;
        var fg = document.createDocumentFragment();
        var list = src.data.split('');
        var len = list.length;
        for(var i=0; i<len; i++){
            var chr = list[i];
            if (chr.match(/[\s\r\n\t]/)) {
                var space = document.createTextNode(chr);
                fg.appendChild(space);
            } else {
                var tn = document.createTextNode(chr);
                var font = document.createElement('font');
                cls = (cnt ++ % 2) ? 'xmas-red' : 'xmas-green';
                font.setAttribute('class', cls);
                font.appendChild(tn);
                fg.appendChild(font);
            }
        }
        src.parentNode.replaceChild(fg, src);
    }
    setTimeout(loop, 1);
};

var rule = "font.xmas-red, font.xmas-green { font-weight: bold; display: inline !important; margin: 0 !important; padding: 0 !important; border: none !important; background: none !important; }\n";
rule += "li { font-weight: bold; }\n";
rule += "font.xmas-red, li:nth-child(even) { color: #F00000 !important; }\n";
rule += "font.xmas-green, li:nth-child(odd) { color: #008000 !important; }\n";
var style = document.createElement('style');
var sn = document.createTextNode(rule);
style.appendChild(sn);
document.body.appendChild(style);

setTimeout(loop, 1);

2012-12-22
Xmas クリスマス気分になれるブックマークレット
http://kawanet.hatenablog.com/entry/20121222/1356188018