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