os0x (owner)

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gist: 140580 Download_button fork
public
Public Clone URL: git://gist.github.com/140580.git
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tailf.user.js #
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// ==UserScript==
// @name           tailf
// @namespace      http://ss-o.net/
// @include        file://*.log
// ==/UserScript==
 
// via http://orera.g.hatena.ne.jp/miya2000/20090704/p0
(function(){
	var pre = document.getElementsByTagName('pre')[0]
	if (!pre) return;
	tailf();
 
	function tailf(prevText){
		var xhr = new XMLHttpRequest();
		try {
			xhr.open('GET',location.href+'?'+new Date*1,false);
			xhr.send(null);
			if (!prevText || xhr.responseText !== prevText) {
				//location.reload(true);
				var end = false;
				if (Math.abs(document.body.scrollHeight - (window.pageYOffset + window.innerHeight)) < 50) end = true;
				pre.textContent = xhr.responseText;
				if (end) document.documentElement.scrollIntoView(false);
			}
			setTimeout(tailf, 1000, xhr.responseText);
		} catch (e) {
			alert(e);
		}
	}
	document.documentElement.scrollIntoView(false);
})();