// 监听键盘按下事件
let isCtrlPressed = false;
let isShiftPressed = false;

document.addEventListener('keydown', (event) => {
    if (event.ctrlKey) isCtrlPressed = true;
    if (event.shiftKey) isShiftPressed = true;
});

document.addEventListener('keyup', (event) => {
    if (!event.ctrlKey) isCtrlPressed = false;
    if (!event.shiftKey) isShiftPressed = false;
});

// 发送按键状态给 background.js
chrome.runtime.onMessage.addListener((message, sender, sendResponse) => {
    if (message.type === 'getKeyboardState') {
        sendResponse({
            ctrl: isCtrlPressed,
            shift: isShiftPressed
        });
    }
});