划词翻译

选中文字按住左键一会儿后放开，自动翻译。
目前为 2017-03-29 提交的版本。查看最新版本。
换行
// ==UserScript==
// @name        划词翻译
// @namespace   http://www.icycat.com
// @description 选中文字按住左键一会儿后放开，自动翻译。
// @author      冻猫
// @include     *
// @version     1.3
// @grant 		GM_xmlhttpRequest
// @grant 		GM_addStyle
// @run-at      document-end
// ==/UserScript==

(function() {

	'use strict';

	function init() {
		var timer, holdTime, isBox, word;
		document.addEventListener('mousedown', mouseStart, false);
		document.addEventListener('mouseup', mouseEnd, false);

		function mouseStart(e) {
			if (!document.getElementById('catTipBox')) {
				createTipBox();
			}
			if (!/catTranslate/i.test(e.target.className)) {
				document.getElementById('catTipBox').style.display = '';
				document.getElementById('catContentBox').innerHTML = '翻译中...';
			}
			if (e.target.id == 'catPlaySound') {
				document.getElementById('catPlaySound').classList.add('catPlaySoundClick');
				getSound(word);
			}
			document.addEventListener('mousemove', moveCheck, false);
		}

		function moveCheck() {
			clearTimeout(timer);
			timer = setTimeout(function() {
				holdTime = true;
			}, 500);
		}

		function mouseEnd() {
			document.removeEventListener('mousemove', moveCheck, false);
			if (document.getElementById('catPlaySound')) {
				document.getElementById('catPlaySound').classList.remove('catPlaySoundClick');
			}
			clearTimeout(timer);
			if (holdTime && window.getSelection().toString()) {
				holdTime = false;
				console.log('开始翻译');
				showTipBox();
				word = window.getSelection().toString();
				getTranslate(word, new Date().getTime());
			}
		}
	}

	function createTipBox() {
		GM_addStyle([
			'#catTipBox {font:normal 12px/24px Helvetica, Tahoma, Arial, sans-serif;text-align: left;position: absolute;z-index: 2147483647;top: 22px;left: -35px;background: #fff;border: 1px solid #dcdcdc;border: 1px solid rgba(0,0,0,.2);-webkit-transition: opacity .218s;transition: opacity .218s;-webkit-box-shadow: 0 2px 4px rgba(0,0,0,.2);box-shadow: 0 2px 4px rgba(0,0,0,.2);padding: 5px 0;display: none;font-size: 12px;line-height: 20px;}',
			'#catContentBox {margin:0 8px;color:#333;}',
			'#catContentBox .catWordBox{margin: 2px 0 1px 0;}',
			'#catContentBox .catWord{font-size:14px;margin: 3px 0 3px;font-weight: bold;color:#333;}',
			'#catContentBox span{margin-left: 5px;color:#333;font-weight: normal;font-size:12px;}',
			'#catPlaySound {cursor:pointer;display: inline-block;vertical-align: middle;width: 14px;height: 11px;overflow: hidden;background: url("data:image/gif;base64,R0lGODlhDgAZAIAAABy3/f///yH5BAAAAAAALAAAAAAOABkAAAI1jA+nC7ncXmg0RlTvndnt7jlcxkmjqWzotLbui4qxqBpUmoDl2Nk5GOKRSsCfDyer7ZYMSQEAOw==") no-repeat;text-decoration: none;}',
			'#catPlaySound.catPlaySoundClick {background-position:0 -14px;}',
			'.catTipArrow {width: 0;height: 0;font-size: 0;line-height: 0;display: block;position: absolute;top: -16px;left: 10px;}',
			'.catTipArrow em, .catTipArrow ins {width: 0;height: 0;font-size: 0;line-height: 0;display: block;position: absolute;border: 8px solid transparent;border-style: dashed dashed solid;}',
			'.catTipArrow em {border-bottom-color: #d8d8d8;font-style: normal;color: #c00;}',
			'.catTipArrow ins {border-bottom-color: #fff;top: 2px;text-decoration: underline;}'
		].join('\n'));
		var catTipBox = document.createElement('div');
		catTipBox.id = 'catTipBox';
		catTipBox.className = 'catTranslate';
		var catContentBox = document.createElement('div');
		catContentBox.id = 'catContentBox';
		catContentBox.className = 'catTranslate';
		var catTipArrow = document.createElement('div');
		catTipArrow.className = 'catTipArrow';
		catTipArrow.appendChild(document.createElement('em'));
		catTipArrow.appendChild(document.createElement('ins'));
		catTipBox.appendChild(catContentBox);
		catTipBox.appendChild(catTipArrow);
		document.body.appendChild(catTipBox);
	}

	function parseRes(jsonRes) {

		var catContentBox = document.getElementById('catContentBox');
		catContentBox.innerHTML = '';
		var obj = JSON.parse(jsonRes);

		if (obj.basic) {

			var catWordBox = document.createElement('div');
			catWordBox.className = 'catWordBox catTranslate';

			if (obj.basic.phonetic) {

				var catWord = document.createElement('span');
				catWord.className = 'catWord catTranslate';
				catWord.innerHTML = obj.query;
				catWordBox.appendChild(catWord);

				var catPhonetic = document.createElement('span');
				catPhonetic.className = 'catTranslate';
				catPhonetic.innerHTML = '[' + obj.basic.phonetic + ']';
				catWordBox.appendChild(catPhonetic);

				if (/^[a-zA-Z]+$/.test(obj.query)) {
					var catPlaySound = document.createElement('span');
					catPlaySound.id = 'catPlaySound';
					catPlaySound.className = 'catTranslate';
					catWordBox.appendChild(catPlaySound);
				}
			}
			catContentBox.appendChild(catWordBox);

			var explains = '';
			for (var i = 0; i < obj.basic.explains.length; i++) {
				if (i > 0) {
					explains = explains + '<br />';
				}
				explains = explains + obj.basic.explains[i];
			}

			var catExplains = document.createElement('div');
			catExplains.className = 'catTranslate';
			catExplains.innerHTML = explains;
			catContentBox.appendChild(catExplains);

		} else {
			explains = obj.translation[0];
			catContentBox.innerHTML = explains;
		}
	}

	function showTipBox() {
		var catTipBox = document.getElementById('catTipBox');
		var selectedRect = window.getSelection().getRangeAt(0).getBoundingClientRect();
		var scrollTop = document.documentElement.scrollTop || document.body.scrollTop;
		if (/Firefox/i.test(navigator.userAgent)) {
			catTipBox.style.top = scrollTop + selectedRect.y + selectedRect.height + 8 + 'px';
			catTipBox.style.left = selectedRect.x + selectedRect.width / 2 - 18 + 'px';
		} else {
			catTipBox.style.top = scrollTop + selectedRect.top + selectedRect.height + 8 + 'px';
			catTipBox.style.left = selectedRect.left + selectedRect.width / 2 - 18 + 'px';
		}
		catTipBox.style.display = 'block';
	}

	function playSound(arraybuffer) {
		var audioCtx = new AudioContext();
		audioCtx.decodeAudioData(arraybuffer).then(function(buffer) {
			var source = audioCtx.createBufferSource();
			source.buffer = buffer;
			source.connect(audioCtx.destination);
			source.start();
		});
	}

	function getSound(word) {
		GM_xmlhttpRequest({
			method: "GET",
			url: 'https://dict.youdao.com/dictvoice?type=2&audio=' + word,
			responseType: 'arraybuffer',
			onload: function(res) {
				playSound(res.response);
			},
		});
	}

	function getTranslate(word, time) {
		GM_xmlhttpRequest({
			method: "GET",
			url: 'http://fanyi.youdao.com/openapi.do?type=data&doctype=json&version=1.1&relatedUrl=http%3A%2F%2Ffanyi.youdao.com%2F&keyfrom=fanyiweb&key=null&translate=on&q=' + word + '&ts=' + time,
			onload: function(res) {
				parseRes(res.responseText);
			},
		});
	}

	init();

})();
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