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AC-baidu： 优化百度、搜狗、谷歌搜索结果之关键词自动高亮

1.自动提取搜索页面的搜索关键词 2.对关键词自动进行高亮处理 W键可以取消高亮 3.动态获取动态的搜索关键词，重新高亮显示

目前为 2018-06-18 提交的版本。查看 最新版本。

// ==UserScript==
// @name AC-baidu： 优化百度、搜狗、谷歌搜索结果之关键词自动高亮
// @description     1.自动提取搜索页面的搜索关键词 2.对关键词自动进行高亮处理 W键可以取消高亮 3.动态获取动态的搜索关键词，重新高亮显示
// @icon            https://coding.net/u/zb227/p/zbImg/git/raw/master/img0/icon.jpg
// @author          AC
// @create          2018-05-25
// @version         1.5
// @include         *
// @home-url        https://gf.qytechs.cn/zh-TW/scripts/368418
// @home-url2       https://github.com/langren1353/GM_script
// @namespace       [email protected]
// @copyright       2017, AC
// @lastmodified    2018-06-18
// @feedback-url    https://gf.qytechs.cn/zh-TW/scripts/368418
// @note            2018.06.18-V1.5 修复在部分csdn网页代码上，高亮不起作用
// @note            2018.06.15-V1.4 修复在CSDN代码中，高亮处理之后导致的多了一部分文字的问题；减少了多次调用可能出现的冲突问题；依旧添加G键也是高亮效果
// @note            2018.06.04-V1.3 1.修复百度翻页之后偶尔不自动高亮的问题；2.新增一定的页面高亮效果的调整；优化关键词的数量，数量到达一定程度，之后的关键词不做高亮处理
// @note            2018.05.31-V1.2 修复由于分词不准的问题导致的丢词问题；修复停止高亮然后又自动启动的问题；修复下划线分割问题；修复左右尖括号转换问题；新增W高亮时复制文字内容
// @note            2018.05.26-V1.1 修复垃圾代码，上个版本真的是垃圾代码，运行又慢，占用又高，还特么定时运行，但就是数据出现很慢，现在应该没有这个问题了
// @note            2018.05.25-V1.0 从百度重定向脚本中拆分出来
// @run-at          document-body
// @grant           GM_getValue
// @grant           GM_setValue
// @grant           GM_setClipboard
// ==/UserScript==

var needDisplayNewFun = true; // 本次更新是否有新功能需要展示
// 初次：还是采用了setInterval来处理，感觉这样的话速度应该比Dom快，也比MO适用，因为MO需要在最后才能调用，实用性还不如timer
// 之后：还是采用MO的方式来处理
(function () {
	'use strict';
	var isInDebug = false;
	var HightLightColorList = ["#FFFF80", "#90EE90", "#33FFFF", "#FF6600", "#FF69B4", "#20B2AA", "#8470FF"];
	var isSearchWindowActive = true;
	var enableDBSelectText = false;
	var oldTextSelectInterval = -1;
	var hasInitBtnBind = false;
	var hasInitBtnBind_DOM = false;
	var dataRapidLock = false;
	var dataConflictLock = false;
	var SiteTypeID; // 标记当前是哪个站点[百度=1;搜狗=2;3=好搜;谷歌=4;必应=5;知乎=6;其他=7]
	var SiteType={
		BAIDU:1,
		SOGOU:2,
		SO:3,
		GOOGLE:4,
		BING:5,
		ZHIHU:6,
		OTHERS:7
	};
	if (location.host.indexOf("www.baidu.com") > -1) {
		SiteTypeID = SiteType.BAIDU;
	} else if (location.host.indexOf("sogou") > -1) {
		SiteTypeID = SiteType.SOGOU;
	}  else if (location.host.indexOf("so.com") > -1) {
		SiteTypeID = SiteType.SO;
	} else if (location.host.indexOf("google") > -1) {
		SiteTypeID = SiteType.GOOGLE;
	} else if (location.host.indexOf("bing") > -1) {
		SiteTypeID = SiteType.BING;
	} else if (location.host.indexOf("zhihu.com") > -1) {
		SiteTypeID = SiteType.ZHIHU;
	} else {
		SiteTypeID = SiteType.OTHERS;
	}
	function DoHighLightWithSearchText(searchValue){
		WordAutoHighLight(searchValue);
	}
	function AC_addStyle(css, className, addToTarget, isReload){ // 添加CSS代码，不考虑文本载入时间，带有className
		var tout = setInterval(function(){
			if(addToTarget == null) addToTarget = "head";
			if(isReload == null) isReload = false;
			if(document.querySelector(addToTarget) != null){
				clearInterval(tout);
				if(isReload == false && document.querySelector("."+className) != null){
					// 节点存在,并且不准备覆盖
					return;
				}
				safeRemove("."+className);
				var cssNode = document.createElement("style");
				if(className != null)
					cssNode.className = className;
				cssNode.innerHTML = css;
				try{
					document.querySelector(addToTarget).appendChild(cssNode);
				}catch (e){console.log(e.message);}
			}
		}, 50);
	}
	function safeRemove(cssSelector){
		try {
			document.querySelector(cssSelector).remove();
		}catch (e){}
	}
	function WordAutoHighLight(searchText){
		if(!hasInitBtnBind){
			hasInitBtnBind = true;
			setTimeout(function(){
				// 似乎过早的绑定可能出现问题，例如www.huomao.com中h5视频的LOGO一直在
				document.addEventListener('keyup', DoHighLight, true);
			}, 500);
		}
		var enableCharCode1 = 'G';
		var enableCharCode2 = 'W';
		var keySets = new Object();
		var counter = 0;
		doHighLightTextS(searchText);
		function DoHighLight(e) { // 手动W触发
			var target = e.target;
			var selectedText = getSelectedText(target);
			var s_keyup = (e.type === 'keyup') && (enableCharCode1.charCodeAt(0)==e.keyCode || enableCharCode2.charCodeAt(0)==e.keyCode);// 是按下特殊按键
			if (s_keyup) {
				if(typeof(selectedText) == "undefined" || selectedText == null || selectedText == ""){
					try{clearInterval(oldTextSelectInterval);}catch (e){console.log(e);}
					console.log("不准亮");
					hasInitBtnBind_DOM = false;
					document.removeEventListener('DOMSubtreeModified', DOMRapidHighLightFunc, false);
					unHighLightAll_Text();
				}else{
					GM_setClipboard(selectedText);
					enableDBSelectText = true;
					doHighLightTextS(selectedText, true);
				}
			}
		}
		function myConsoleLog(text){
			if(isInDebug){
				console.log(text);
			}
		}
		function doHighLightTextS(selectedText, dbclick) {
			if(typeof(selectedText) == "undefined" || selectedText == null || selectedText == "") return;
			unHighLightAll_Text();
			if(dbclick){
				GM_setValue("searchKeyWords", selectedText);
				myConsoleLog("双击:" + selectedText + keySets.keywords);
			}
			initKeySets(selectedText);
			doHighLightAll_CSS();
			doHighLightAll_Text();
			setTimeout(function(){doHighLightAll_Text();}, 1500);
			if(hasInitBtnBind_DOM == false){
				hasInitBtnBind_DOM = true;
				document.addEventListener('DOMSubtreeModified', DOMRapidHighLightFunc, false);
			}
		}
		function DOMRapidHighLightFunc(e) {
			if(dataRapidLock == false){
				dataRapidLock = true;
				doHighLightAll_Text();
				setTimeout(function(){dataRapidLock = false;}, 200);
			}
		}
		function getSelectedText(target) {
			function getTextSelection() {
				var selectedText = '';
				if (target.getAttribute("type")) {
					if (target.getAttribute("type").toLowerCase() === "checkbox") return '';
				}
				var value = target.value;
				if (value) {
					var startPos = target.selectionStart;
					var endPos = target.selectionEnd;
					if (!isNaN(startPos) && !isNaN(endPos)) selectedText = value.substring(startPos, endPos);
					return selectedText;
				} else return '';
			}
			var selectedText = window.getSelection().toString();
			if (!selectedText) selectedText = getTextSelection();
			myConsoleLog(selectedText);
			return selectedText;
		}
		function getBLen(str) {
			if (str == null) return 0;
			if (typeof str != "string"){
				str += "";
			}
			return str.replace(/[^\x00-\xff]/g,"01").length;
		}
		function reSplitKeySet(keySet){
			var data = keySet
				.split(/\b |[\u0000-\u002F\u003A-\u0040\u005B-\u005e\u007B-\u00FF\uFF00-\uFFFF\u3000-\u303F]/g)
				.join('ACsCA')
				.replace(/[^\u4E00-\u9FA5|0-9|a-z|A-Z_]+/g, "")
				.replace(/(ACsCA){2}/g, "ACsCA")
				.replace(/(^ACsCA|ACsCA$)/g, "")
				.split("ACsCA");
			var newData = new Array();
			for(var i = 0, j = 0; i < data.length; i++){
				if(data[i].length > 1){
					newData[j++] = data[i];
				}
			}
			return newData;
		}
		// 初始化点击的文字信息
		function initKeySets(selection){
			// 1.split通过特殊字符和字符边界分割串[非[0-9A-Za-z]特殊字符]
			// 2.通过特定字符连接原始串，
			// 3.1移除多次重复的特定串，非常用串移除，避免空串
			// 3.2移除开头或者结尾的特定串，避免分割后出现空白数据，
			// 4.按特定串分割
			keySets.keywords = reSplitKeySet(selection);
			keySets.length = keySets.keywords.length;
			keySets.textcolor = new Array();
			keySets.visible = new Array();
			for(var i=0; i < keySets.keywords.length; i++){
				keySets.textcolor[i] = "rgb(0,0,0)";
				keySets.visible[i] = "true";
			}
		}
		function doHighLightAll_CSS(){ // 顶部的那一堆数组
			if (keySets.visible[0] == "true"){
				var rule = ".acWHSet{display:inline!important;box-shadow: -3px 0px 3px 0.15px rgba(0, 0, 0, 0.15);";
				if (keySets.textcolor.length > 0) rule += "color:"+keySets.textcolor[0]+";";
				rule += "font-weight:inherit;}";
				for(var i = 0; i < keySets.keywords.length; i++){
					rule += ".acWHSet[data='"+keySets.keywords[i].toLocaleLowerCase()+"']{background-color:"+HightLightColorList[i % HightLightColorList.length]+";}";
				}
				AC_addStyle(rule, "AC-highLightRule", "body", true);
			}
		}
		function doHighLightAll_Text(){
			if(dataConflictLock == true) return;
			dataConflictLock = true;
			doHighLightAll_Text_Inner();
			dataConflictLock = false;
		}
		function doHighLightAll_Text_Inner(){
			var selection = GM_getValue("searchKeyWords", "");
			// console.log("执行高亮"+selection);
			keySets.keywords = reSplitKeySet(selection);
			if(keySets.keywords.length == 0) {
				return; // 退出1
			}
			var patExp = "";
			for(var index=0, sizeCount = 0; index<keySets.keywords.length-1 && index < 8 && sizeCount < 50; index++) {
				patExp += keySets.keywords[index]+"|";
				sizeCount += keySets.keywords[index].length;
			}
			patExp += keySets.keywords[index];
			var pat = new RegExp("("+patExp+")", "gi");
			var span = document.createElement('span');
			var snapElements = document.evaluate(
				'.//text()[normalize-space() != "" ' +
				'and not(ancestor::style) ' +
				'and not(ancestor::script) ' +
				'and not(ancestor::textarea) ' +
				'and not(ancestor::div[@id="thdtopbar"]) ' +
				'and not(ancestor::div[@id="kwhiedit"]) ' +
				'and not(ancestor::pre) '+ // CSDN的代码文字，未初始化之前的1--->不作处理
				'or ancestor::pre[@class="prettyprint"] '+ // CSDN的代码文字，未初始化之前的1--->不作处理
				'and not(parent::span[@txhidy15]) ' +
				']',
				document.body, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
			if (!snapElements.snapshotItem(0)) {
				return;
			} // 退出2
			try{
				for (var i = 0, len = snapElements.snapshotLength; i < len; i++) {
					var node = snapElements.snapshotItem(i);
					if (node.nodeValue.length > 1 && pat.test(node.nodeValue)) {
						if(node.className!= null && node.className.indexOf("acWHSet") > 0){
							return;
						}
						var sp = span.cloneNode(true);
						var findResult = node.nodeValue.replace(/</g, '&lt;').replace(/>/g, '&gt;');
						// var findResult = node.nodeValue;
						// if(findResult.length > 500) continue; // 文字过长-文本区域
						var repNodeHTML = findResult.replace(pat, '<span class="THmo acWHSet" txhidy15="acWHSet">$1</span>');
						sp.innerHTML = repNodeHTML;
						if(node.parentNode == null) continue;
						node.parentNode.replaceChild(sp, node);
						sp.outerHTML = sp.innerHTML;
					}
				}
				var attributeDataResetList = document.querySelectorAll(".acWHSet");
				for(var i = 0; i < attributeDataResetList.length; i++){
					attributeDataResetList[i].setAttribute("data", attributeDataResetList[i].innerHTML.toLocaleLowerCase());
				}
			}catch (e) {
				console.log(e);
			}
			return;
		}
		function unHighLightAll_Text(){
			try{
				var tgts = document.querySelectorAll('span[txhidy15="acWHSet"]');
				for (var i=0; i<tgts.length; i++){
					var parnode = tgts[i].parentNode, parpar = parnode.parentNode, tgtspan;
					if (parnode.hasAttribute("thdcontain") && parnode.innerHTML == tgts[i].outerHTML){
						parnode.outerHTML = tgts[i].textContent.replace(/</g, '&lt;').replace(/>/g, '&gt;');
						tgtspan = parpar;
					} else {
						tgts[i].outerHTML = tgts[i].textContent.replace(/</g, '&lt;').replace(/>/g, '&gt;');
						tgtspan = parnode;
					}
					tgtspan.normalize();
					if (tgtspan.hasAttribute("thdcontain")){
						parnode = tgtspan.parentNode;
						if (parnode){
							if (parnode.hasAttribute("thdcontain") && parnode.innerHTML == tgtspan.outerHTML && tgtspan.querySelectorAll('span[txhidy15]').length == 0){
								parnode.outerHTML = tgtspan.innerHTML;
							} else if (parnode.innerHTML == tgtspan.outerHTML && tgtspan.querySelectorAll('span[txhidy15]').length == 0) {
								parnode.innerHTML = tgtspan.innerHTML;
							}
						}
					}
				}
				var oldTgs = document.querySelectorAll("span[thdcontain='true']");
				counter = 0;
				for(var i=0; i < oldTgs.length; i++){
					var curTg = oldTgs[i];
					markChildandRemove(curTg);
				}
			}catch (e){}
		}
		function markChildandRemove(node){
			try{
				if(node.tagName.toLowerCase() == "span"){
					node.outerHTML = node.innerHTML;
				}
				var childList = node.childNodes;
				for(var i=0; i < childList.length; i++){
					counter++;
					var node = childList[i];
					markChildandRemove(node);
					if(node.tagName.toLowerCase() == "span"){
						node.outerHTML = node.innerHTML;
					}
				}
			}catch (e){}
		}
	}

	// 如果是搜索引擎的话
	if(SiteTypeID != SiteType.OTHERS){ // 启用自动高亮
		// 持续拿到搜索关键词，存入GM中，避免切换页面导致的关键词丢失
		DoHighLightWithSearchText(GM_getValue("searchKeyWords", ""));
		setInterval(function(){
			if(document.hidden == true){ // 只要是搜索窗口不激活，那么flag=false
				isSearchWindowActive = false;
				enableDBSelectText = false;
			}
			// 窗口激活状态；或者是窗口之前是不激活，现在激活了
			if(isSearchWindowActive == true || (isSearchWindowActive == false && document.hidden == false)) {
				var searchValue = (window.location.search.substr(1) + "").split("&");
				for (var i = 0; i < searchValue.length; i++) {
					var key_value = searchValue[i].split("=");
					if (/^(wd|q|query)$/.test(key_value[0])) {
						var searchWords = decodeURI(key_value[1]).toLocaleLowerCase().replace(/\+/g, " ");
						if(GM_getValue("searchKeyWords", "") != searchWords && enableDBSelectText == false){ // 避免重复掉用，一直刷新关键词
							GM_setValue("searchKeyWords", searchWords);
							DoHighLightWithSearchText(GM_getValue("searchKeyWords", ""));
						}
						break;
					}
				}
			}
		}, 1000);
	}else{
		DoHighLightWithSearchText(GM_getValue("searchKeyWords", ""));
	}
})();

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