89 lines
4.1 KiB
JavaScript
89 lines
4.1 KiB
JavaScript
let isHighlight = true;
|
||
|
||
function cancelBtnHandler() {
|
||
cancelHighlighting();
|
||
document.getElementById("text-content").removeEventListener("click", fillInWord, false);
|
||
document.getElementById("text-content").removeEventListener("touchstart", fillInWord, false);
|
||
document.getElementById("text-content").addEventListener("click", fillInWord2, false);
|
||
document.getElementById("text-content").addEventListener("touchstart", fillInWord2, false);
|
||
}
|
||
|
||
function showBtnHandler() {
|
||
document.getElementById("text-content").removeEventListener("click", fillInWord2, false);
|
||
document.getElementById("text-content").removeEventListener("touchstart", fillInWord2, false);
|
||
document.getElementById("text-content").addEventListener("click", fillInWord, false);
|
||
document.getElementById("text-content").addEventListener("touchstart", fillInWord, false);
|
||
highLight();
|
||
}
|
||
|
||
function getWord() {
|
||
return window.getSelection ? window.getSelection() : document.selection.createRange().text;
|
||
}
|
||
|
||
function highLight() {
|
||
if (!isHighlight) return;
|
||
let articleContent = document.getElementById("article").innerText;
|
||
let pickedWords = document.getElementById("selected-words"); // words picked to the text area
|
||
let dictionaryWords = document.getElementById("selected-words2"); // words appearing in the user's new words list
|
||
let allWords = dictionaryWords === null ? pickedWords.value + " " : pickedWords.value + " " + dictionaryWords.value;
|
||
const list = allWords.split(" "); // 将所有的生词放入一个list中，用于后续处理
|
||
for (let i = 0; i < list.length; ++i) {
|
||
list[i] = list[i].replace(/(^\W*)|(\W*$)/g, ""); // 消除单词两边的非单词字符
|
||
if (list[i] != "" && "<mark>".indexOf(list[i]) === -1 && "</mark>".indexOf(list[i]) === -1) {
|
||
// 返回所有匹配单词的集合, 正则表达式RegExp()中, "\b"匹配一个单词的边界, g 表示全局匹配, i 表示对大小写不敏感。
|
||
let matches = new Set(articleContent.match(new RegExp("\\b" + list[i] + "\\b", "gi")));
|
||
for (let word of matches) {
|
||
// 将文章中所有出现该单词word的地方改为："<mark>" + word + "<mark>"。
|
||
articleContent = articleContent.replace(new RegExp("\\b" + word + "\\b", "g"), "<mark>" + word + "</mark>");
|
||
}
|
||
}
|
||
}
|
||
document.getElementById("article").innerHTML = articleContent;
|
||
}
|
||
|
||
function cancelHighlighting() {
|
||
let articleContent = document.getElementById("article").innerText;//将原来的.innerText改为.innerHtml，原因同上
|
||
let pickedWords = document.getElementById("selected-words");
|
||
const dictionaryWords = document.getElementById("selected-words2");
|
||
const list = pickedWords.value.split(" ");
|
||
if (pickedWords != null) {
|
||
for (let i = 0; i < list.length; ++i) {
|
||
list[i] = list[i].replace(/(^\s*)|(\s*$)/g, "");
|
||
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
|
||
articleContent = articleContent.replace(new RegExp("<mark>"+list[i]+"</mark>", "g"), list[i]);
|
||
}
|
||
}
|
||
}
|
||
if (dictionaryWords != null) {
|
||
let list2 = pickedWords.value.split(" ");
|
||
for (let i = 0; i < list2.length; ++i) {
|
||
list2 = dictionaryWords.value.split(" ");
|
||
list2[i] = list2[i].replace(/(^\s*)|(\s*$)/g, "");
|
||
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
|
||
articleContent = articleContent.replace(new RegExp("<mark>"+list2[i]+"</mark>", "g"), list2[i]);
|
||
}
|
||
}
|
||
}
|
||
document.getElementById("article").innerHTML = articleContent;
|
||
}
|
||
|
||
function fillInWord() {
|
||
highLight();
|
||
}
|
||
|
||
function fillInWord2() {
|
||
cancelHighlighting();
|
||
}
|
||
|
||
function toggleHighlighting() {
|
||
if (isHighlight) {
|
||
isHighlight = false;
|
||
cancelHighlighting();
|
||
} else {
|
||
isHighlight = true;
|
||
highLight();
|
||
}
|
||
}
|
||
|
||
showBtnHandler();
|