let isRead = true;
let isChoose = true;
let reader = window.speechSynthesis; // 全局定义朗读者，以便朗读和暂停

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 read(s) {
    let msg = new SpeechSynthesisUtterance(s);
    reader.speak(msg);
}


function onReadClick() {
    isRead = !isRead;
    if (!isRead) {
        reader.cancel();
    }
}

function onChooseClick() {
    isChoose = !isChoose;
}