100 lines
4.2 KiB
JavaScript
100 lines
4.2 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 = pickedWords.value + " " + dictionaryWords.value;
|
||
const list = allWords.split(" ");
|
||
for (let i = 0; i < list.length; ++i) {
|
||
list[i] = list[i].replace(/(^\s*)|(\s*$)/g, ""); //消除单词两边的空字符
|
||
if (list[i] !== "" && "<mark>".indexOf(list[i]) === -1 && "</mark>".indexOf(list[i]) === -1) {
|
||
//将文章中所有出现该单词word的地方改为："<mark>" + word + "<mark>"。 正则表达式RegExp()中，"\\b"代表单词边界匹配。
|
||
|
||
//修改代码
|
||
let articleContent_fb = articleContent; //文章副本
|
||
let count = 1000; //简单计数器，防止陷入死循环。
|
||
while(articleContent_fb.toLowerCase().indexOf(list[i].toLowerCase()) !== -1 && list[i]!=""){
|
||
//针对同一篇文章中可能存在相同单词的不同大小写问题，采用while循环判断副本中是否还存在匹配单词。
|
||
|
||
count--;
|
||
if(count <= 0)break; //TimeOut!
|
||
|
||
//找到副本中和list[i]匹配的第一个单词(第一种匹配情况),并赋值给list[i]。
|
||
list[i] = articleContent_fb.substr(articleContent_fb.toLowerCase().indexOf(list[i].toLowerCase()),list[i].length);
|
||
|
||
articleContent_fb = articleContent_fb.replace(list[i],""); //删除副本中和list[i]匹配的单词
|
||
articleContent = articleContent.replace(new RegExp("\\b"+list[i]+"\\b","g"),"<mark>" + list[i] + "</mark>");
|
||
}
|
||
}
|
||
}
|
||
document.getElementById("article").innerHTML = articleContent;
|
||
}
|
||
|
||
function cancelHighlighting() {
|
||
let articleContent = document.getElementById("article").innerText;
|
||
let pickedWords = document.getElementById("selected-words");
|
||
const dictionaryWords = document.getElementById("selected-words2");
|
||
const list = pickedWords.value.split(" ");
|
||
if (pickedWords != null) {
|
||
for (let i = 0; i < list.length; ++i) {
|
||
list[i] = list[i].replace(/(^\s*)|(\s*$)/g, "");
|
||
if (list[i] !== "") {
|
||
articleContent = articleContent.replace("<mark>" + list[i] + "</mark>", "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] !== "") {
|
||
articleContent = articleContent.replace("<mark>" + list[i] + "</mark>", "list[i]");
|
||
}
|
||
}
|
||
}
|
||
document.getElementById("article").innerHTML = articleContent;
|
||
}
|
||
|
||
function fillInWord() {
|
||
highLight();
|
||
}
|
||
|
||
function fillInWord2() {
|
||
cancelHighlighting();
|
||
}
|
||
|
||
function toggleHighlighting() {
|
||
if (isHighlight) {
|
||
isHighlight = false;
|
||
cancelHighlighting();
|
||
} else {
|
||
isHighlight = true;
|
||
highLight();
|
||
}
|
||
}
|
||
|
||
showBtnHandler();
|