forked from mrlan/EnglishPal
115 lines
4.7 KiB
JavaScript
115 lines
4.7 KiB
JavaScript
let isHighlight = true;
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function cancelBtnHandler() {
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cancelHighlighting();
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document
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.getElementById("text-content")
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.removeEventListener("click", fillInWord, false);
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document.getElementById("text-content")
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.removeEventListener("touchstart", fillInWord, false);
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document.getElementById("text-content")
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.addEventListener("click", fillInWord2, false);
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document.getElementById("text-content")
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.addEventListener("touchstart", fillInWord2, false);
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}
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function showBtnHandler() {
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document.getElementById("text-content")
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.removeEventListener("click", fillInWord2, false);
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document.getElementById("text-content")
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.removeEventListener("touchstart", fillInWord2, false);
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document.getElementById("text-content")
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.addEventListener("click", fillInWord, false);
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document.getElementById("text-content")
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.addEventListener("touchstart", fillInWord, false);
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highLight();
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}
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function getWord() {
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return (window.getSelection ?
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window.getSelection() :
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document.selection.createRange().text);
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}
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function highLight() {
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if (!isHighlight) {return;}
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let articleContent = document.getElementById("article").innerText; //将原来的.innerText改为.innerHtml，使用innerText会把原文章中所包含的<br>标签去除，导致处理后的文章内容失去了原来的格式
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let pickedWords = document.getElementById("selected-words"); // words picked to the text area
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let dictionaryWords = document.getElementById("selected-words2"); // words appearing in the user's new words list
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let allWords = ""; //初始化allWords的值，避免进入判断后编译器认为allWords未初始化的问题
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if(dictionaryWords !== null){//增加一个判断，检查生词本里面是否为空，如果为空，allWords只添加选中的单词
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allWords = pickedWords.value + " " + dictionaryWords.value;
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}
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else{
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allWords = pickedWords.value + " ";
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}
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const list = allWords.split(" ");//将所有的生词放入一个list中，用于后续处理
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for (let i = 0; i < list.length; i+=1) {
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list[i] = list[i].replace(/(^\s*)|(\s*$)/gm, ""); //消除单词两边的空字符
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list[i] = list[i].replace("|", "");
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list[i] = list[i].replace("?", "");
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if (list[i] !== "" &&
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"<mark>".indexOf(list[i]) === -1 &&
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"</mark>".indexOf(list[i]) === -1
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) {
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//将文章中所有出现该单词word的地方改为：" <mark>" + word + "<mark> "。 正则表达式RegExp()中，"\\s"代表单词前后必须要有空格，以防止只对单词中的部分字符高亮的情况出现。
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articleContent = articleContent.replace(
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new RegExp("\\s"+list[i]+"\\s", "g"),
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" <mark>" + list[i] + "</mark> ");
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}
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}
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document.getElementById("article").innerHTML = articleContent;
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}
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function cancelHighlighting() {
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let articleContent = document.getElementById("article").innerText;//将原来的.innerText改为.innerHtml，原因同上
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let pickedWords = document.getElementById("selected-words");
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const dictionaryWords = document.getElementById("selected-words2");
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const list = pickedWords.value.split(" ");
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if (pickedWords !== null) {
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for (let i = 0; i < list.length; i+=1) {
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list[i] = list[i].replace(/(^\s*)|(\s*$)/gm, "");
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if (list[i] !== "") { //原来判断的代码中，替换的内容为“list[i]”这个字符串，这明显是错误的，我们需要替换的是list[i]里的内容
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articleContent = articleContent.replace(
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new RegExp("<mark>"+list[i]+"</mark>", "g"),
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list[i]
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);
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}
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}
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}
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if (dictionaryWords !== null) {
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let list2 = pickedWords.value.split(" ");
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for (let i = 0; i < list2.length; i+=1) {
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list2 = dictionaryWords.value.split(" ");
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list2[i] = list2[i].replace(/(^\s*)|(\s*$)/gm, "");
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if (list2[i] !== "") { //原来代码中，替换的内容为“list[i]”这个字符串，这明显是错误的，我们需要替换的是list[i]里的内容
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articleContent = articleContent.replace(
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new RegExp("<mark>"+list2[i]+"</mark>", "g"),
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list2[i]
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);
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}
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}
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}
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document.getElementById("article").innerHTML = articleContent;
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}
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function fillInWord() {
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highLight();
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}
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function fillInWord2() {
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cancelHighlighting();
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}
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function toggleHighlighting() {
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if (isHighlight) {
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isHighlight = false;
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cancelHighlighting();
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} else {
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isHighlight = true;
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highLight();
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}
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}
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showBtnHandler();
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