Function getRFBkeycode

systemvm/agent/noVNC/core/rfb.js:3248–3255

(xtScanCode)

    QEMUExtendedKeyEvent(sock, keysym, down, keycode) {
        function getRFBkeycode(xtScanCode) {
            const upperByte = (keycode >> 8);
            const lowerByte = (keycode & 0x00ff);
            if (upperByte === 0xe0 && lowerByte < 0x7f) {
                return lowerByte | 0x80;
            }
            return xtScanCode;
        }

        sock.sQpush8(255); // msg-type
        sock.sQpush8(0); // sub msg-type