forked from mrlan/EnglishPal
89 lines
4.1 KiB
JavaScript
89 lines
4.1 KiB
JavaScript
let isHighlight = true;
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function cancelBtnHandler() {
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cancelHighlighting();
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document.getElementById("text-content").removeEventListener("click", fillInWord, false);
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document.getElementById("text-content").removeEventListener("touchstart", fillInWord, false);
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document.getElementById("text-content").addEventListener("click", fillInWord2, false);
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document.getElementById("text-content").addEventListener("touchstart", fillInWord2, false);
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}
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function showBtnHandler() {
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document.getElementById("text-content").removeEventListener("click", fillInWord2, false);
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document.getElementById("text-content").removeEventListener("touchstart", fillInWord2, false);
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document.getElementById("text-content").addEventListener("click", fillInWord, false);
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document.getElementById("text-content").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 ? window.getSelection() : 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;
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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 = dictionaryWords === null ? pickedWords.value + " " : pickedWords.value + " " + dictionaryWords.value;
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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) {
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list[i] = list[i].replace(/(^\W*)|(\W*$)/g, ""); // 消除单词两边的非单词字符
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if (list[i] != "" && "<mark>".indexOf(list[i]) === -1 && "</mark>".indexOf(list[i]) === -1) {
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// 返回所有匹配单词的集合, 正则表达式RegExp()中, "\b"匹配一个单词的边界, g 表示全局匹配, i 表示对大小写不敏感。
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let matches = new Set(articleContent.match(new RegExp("\\b" + list[i] + "\\b", "gi")));
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for (let word of matches) {
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// 将文章中所有出现该单词word的地方改为："<mark>" + word + "<mark>"。
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articleContent = articleContent.replace(new RegExp("\\b" + word + "\\b", "g"), "<mark>" + word + "</mark>");
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}
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}
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}
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document.getElementById("article").innerHTML = articleContent;
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}
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function cancelHighlighting() {
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let articleContent = document.getElementById("article").innerText;//将原来的.innerText改为.innerHtml，原因同上
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let pickedWords = document.getElementById("selected-words");
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const dictionaryWords = document.getElementById("selected-words2");
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const list = pickedWords.value.split(" ");
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if (pickedWords != null) {
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for (let i = 0; i < list.length; ++i) {
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list[i] = list[i].replace(/(^\s*)|(\s*$)/g, "");
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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(new RegExp("<mark>"+list[i]+"</mark>", "g"), list[i]);
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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) {
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list2 = dictionaryWords.value.split(" ");
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list2[i] = list2[i].replace(/(^\s*)|(\s*$)/g, "");
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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(new RegExp("<mark>"+list2[i]+"</mark>", "g"), list2[i]);
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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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