forked from mrlan/EnglishPal
71 lines
2.0 KiB
JavaScript
71 lines
2.0 KiB
JavaScript
let isRead = true;
|
||
let isChoose = true;
|
||
let reader = window.speechSynthesis; // 全局定义朗读者，以便朗读和暂停
|
||
let current_position = 0; // 朗读文本的当前位置
|
||
let original_position = 0; // 朗读文本的初始位置
|
||
let to_speak = ""; // 朗读的初始内容
|
||
|
||
function getWord() {
|
||
return window.getSelection ? window.getSelection() : document.selection.createRange().text;
|
||
}
|
||
|
||
function fillInWord() {
|
||
let word = getWord();
|
||
if (isRead) read(word);
|
||
if (!isChoose) return;
|
||
const element = document.getElementById("selected-words");
|
||
element.value = element.value + " " + word;
|
||
}
|
||
|
||
document.getElementById("text-content").addEventListener("click", fillInWord, false);
|
||
|
||
function makeUtterance(str, rate) {
|
||
let msg = new SpeechSynthesisUtterance(str);
|
||
msg.rate = rate;
|
||
msg.lang = "en-US"; // TODO: add language options menu
|
||
msg.onboundary = ev => {
|
||
if (ev.name == "word") {
|
||
current_position = ev.charIndex;
|
||
}
|
||
}
|
||
return msg;
|
||
}
|
||
|
||
const sliderValue = document.getElementById("rangeValue"); // 显示值
|
||
const inputSlider = document.getElementById("rangeComponent"); // 滑块元素
|
||
inputSlider.oninput = () => {
|
||
let value = inputSlider.value; // 获取滑块的值
|
||
sliderValue.textContent = value + '×';
|
||
if (!reader.speaking) return;
|
||
reader.cancel();
|
||
let msg = makeUtterance(to_speak.substring(original_position + current_position), value);
|
||
original_position = original_position + current_position;
|
||
current_position = 0;
|
||
reader.speak(msg);
|
||
};
|
||
|
||
function read(s) {
|
||
to_speak = s.toString();
|
||
original_position = 0;
|
||
current_position = 0;
|
||
let msg = makeUtterance(to_speak, inputSlider.value);
|
||
reader.speak(msg);
|
||
}
|
||
|
||
function onReadClick() {
|
||
isRead = !isRead;
|
||
if (!isRead) {
|
||
reader.cancel();
|
||
}
|
||
}
|
||
|
||
function onChooseClick() {
|
||
isChoose = !isChoose;
|
||
}
|
||
|
||
function stopRead() {
|
||
reader.cancel();
|
||
}
|
||
if (performance.navigation.type == 1) { //如果网页刷新，停止播放声音
|
||
stopRead()
|
||
} |