[Sleipnir] Google_Translate

Google_Translate.user.js

// ==UserScript==
// @name Google_Translate
// @description 日本語じゃないページを見つけるとGoogle_Translateで翻訳するか聞いてくる
// @include http*
// @exclude http://translate.google.*
// @exclude http://google.*/*
// @exclude http://seesmic.com/*
// ==/UserScript==
(function(_d){
	if(_d.body.innerText.length===0) return;
	var html = _d.getElementsByTagName('html')[0];
	if(html && html.lang==='ja') return;
	
	// Advanced rate check
	var ADVANSE = false;
	// Threshold of translate
	var RATE = 0.3;
	
	var result;
	if(ADVANSE)
		result = checkRateA();
	else
		result = checkRateN();
	
	if(result.rate <= RATE) 
		translate(result);
	
	function checkRateN(){
		var ts,te;
		ts = new Date * 1;
		var arr = _d.body.innerText.split('\n');
		var len = arr.length;
		var jp = 0;
		for(var i=0; i<len; i++){
			if( /[ぁ-んァ-ンｧ-ﾝ]/.test(arr[i]) )
				jp++;
		};
		te = new Date * 1;
		return { rate: jp / len, time: te - ts };
	};
	function checkRateA(){
		var ts = new Date * 1;
		var text = _d.body.innerText;
		var len = text.length;
		var jp = 0;
		for(var i=0; i<len; i++){
			if( /[ぁ-んァ-ンｧ-ﾝ]/.test(text[i]) )
				jp++;
		};
		var te = new Date * 1;
		return { rate: jp / len, time: te - ts };
	};
	function translate(result){
		var isOldMode = ((typeof document.body.style.maxHeight == "undefined") || (document.compatMode != 'CSS1Compat'));
		var head = _d.createElement('div');
			head.id = 'Sleipnir_Google_Translate';
			head.style.cssText = 'position:fixed; width:100%;top:0px; left:0px;padding:4px; margin:0px;background-color:lightgreen;text-align:center;z-index:9999;';
			if(isOldMode) head.style.position = 'absolute';
			
		var text = ['おや、どうやら日本語のページではないようです...　ページによってはうまくいかない場合がありますがGoogle翻訳を試みますか？日本語率(',
				Math.round(result.rate*1000) /10,'%) time: ',result.time,'ms'].join('');
		var p = _d.createElement('p');
			p.style.cssText = 'padding:0px; margin:0px;background-color:lightgreen;font-size:12px;color:#333;text-align:center;';
			p.innerText = text;
		var btn1 = _d.createElement('a');
			btn1.href = "#";
			btn1.style.cssText = 'padding:0px 4px;font-size:12px;color:#33f;';
			btn1.innerText = '翻訳';
		var btn2 = _d.createElement('a');
			btn2.style.cssText = 'padding:0px 4px;font-size:12px;color:#33f;';
			btn2.href = "#";
			btn2.innerText = '閉じる';
		
		head.appendChild(p);
		head.appendChild(btn1);
		head.appendChild(btn2);
		_d.body.appendChild(head);
		btn1.onclick = click;
		btn2.onclick = close;
	};
	function click(){
		var t = ((window.getSelection&&window.getSelection())||(document.getSelection&&document.getSelection())||(document.selection&&document.selection.createRange&&document.selection.createRange().text));
		if(t!=''){
			var e = (document.charset||document.characterSet);
			location.href = 'http://translate.google.com/?text='
			+ t
			+ '&hl=ja&langpair=auto|ja&tbb=1&ie='
			+ e;
		}
		else{
			location.href='http://translate.google.com/translate?u='
			+ encodeURIComponent(location.href)
			+ '&hl=ja&langpair=auto|ja&tbb=1&ie=';
		};
	};
	function close(){
		document.getElementById('Sleipnir_Google_Translate').style.display = 'none';
	};
})(document);