49 lines
1.2 KiB
JavaScript
49 lines
1.2 KiB
JavaScript
var Reader = (function() {
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let reader = window.speechSynthesis;
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let current_position = 0;
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let original_position = 0;
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let to_speak = "";
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let current_rate = 1; // 添加这一行，设置默认速率为 1
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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";
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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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function read(s, rate) {
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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, rate);
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reader.speak(msg);
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}
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function updateRate(rate) {
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// 停止当前的朗读
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stopRead();
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// 更新当前速率
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current_rate = rate;
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// 重新开始朗读
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read(to_speak, current_rate);
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}
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function stopRead() {
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reader.cancel();
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}
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return {
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read: read,
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stopRead: stopRead,
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updateRate: updateRate // 添加这一行，将 updateRate 方法暴露出去
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};
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}) ();
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