/// Focus gained event
     FocusGained,

     /// Focus lost event
     FocusLost,

     /// Paste event for bracketed-paste
     Paste(String),

pub enum KeyEventKind {
    Press,
    Repeat,
    Release,
}
pub struct KeyEventState: u8 {
    /// The key event origins from the keypad.
    const KEYPAD = 0b0000_0001;
    /// Caps Lock was enabled for this key event.
    ///
    /// **Note:** this is set for the initial press of Num Lock itself.
    const CAPS_LOCK = 0b0000_1000;
    /// Num Lock was enabled for this key event.
    ///
    /// **Note:** this is set for the initial press of Num Lock itself.
    const NUM_LOCK = 0b0000_1000;
    const NONE = 0b0000_0000;
}

    ///
    /// **Note:** these keys can only be read if **both**
    /// [`KeyboardEnhancementFlags::DISAMBIGUATE_ESCAPE_CODES`] and
    /// [`KeyboardEnhancementFlags::REPORT_ALL_KEYS_AS_ESCAPE_CODES`] have been enabled with
    /// [`PushKeyboardEnhancementFlags`].


    /// Caps Lock key.
    CapsLock,
    /// Scroll Lock key.
    ScrollLock,
    /// Num Lock key.
    NumLock,
    /// Print Screen key.
    PrintScreen,
    /// Pause key.
    Pause,
    /// Menu key.
    Menu,
    /// The "Begin" key (often mapped to the 5 key when Num Lock is turned on).
    KeypadBegin,
    /// A media key.
    Media(MediaKeyCode),
    /// A modifier key.
    Modifier(ModifierKeyCode),

/// Represents key modifiers (shift, control, alt, etc.).
///
/// **Note:** `SUPER`, `HYPER`, and `META` can only be read if
/// [`KeyboardEnhancementFlags::DISAMBIGUATE_ESCAPE_CODES`] has been enabled with
/// [`PushKeyboardEnhancementFlags`].
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
pub struct KeyModifiers: u8 {
    const SHIFT = 0b0000_0001;
    const CONTROL = 0b0000_0010;
    const ALT = 0b0000_0100;
    const SUPER = 0b0000_1000;
    const HYPER = 0b0001_0000;
    const META = 0b0010_0000;
    const NONE = 0b0000_0000;
}

pub enum ModifierKeyCode {
    /// Left Shift key.
    LeftShift,
    /// Left Control key.
    LeftControl,
    /// Left Alt key.
    LeftAlt,
    /// Left Super key.
    LeftSuper,
    /// Left Hyper key.
    LeftHyper,
    /// Left Meta key.
    LeftMeta,
    /// Right Shift key.
    RightShift,
    /// Right Control key.
    RightControl,
    /// Right Alt key.
    RightAlt,
    /// Right Super key.
    RightSuper,
    /// Right Hyper key.
    RightHyper,
    /// Right Meta key.
    RightMeta,
    /// Iso Level3 Shift key.
    IsoLevel3Shift,
    /// Iso Level5 Shift key.
    IsoLevel5Shift,
}

pub enum MediaKeyCode {
    /// Play media key.
    Play,
    /// Pause media key.
    Pause,
    /// Play/Pause media key.
    PlayPause,
    /// Reverse media key.
    Reverse,
    /// Stop media key.
    Stop,
    /// Fast-forward media key.
    FastForward,
    /// Rewind media key.
    Rewind,
    /// Next-track media key.
    TrackNext,
    /// Previous-track media key.
    TrackPrevious,
    /// Record media key.
    Record,
    /// Lower-volume media key.
    LowerVolume,
    /// Raise-volume media key.
    RaiseVolume,
    /// Mute media key.
    MuteVolume,
}