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//! Keyboard input handling
use std::collections::HashSet;
/// Represents a physical keyboard key.
///
/// Taken from <https://docs.rs/winit/latest/src/winit/keyboard.rs.html#296-740>
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
#[non_exhaustive]
pub enum KeyCode {
/// <kbd>`</kbd> on a US keyboard. This is also called a backtick or grave.
/// This is the <kbd>半角</kbd>/<kbd>全角</kbd>/<kbd>漢字</kbd>
/// (hankaku/zenkaku/kanji) key on Japanese keyboards
Backquote,
/// Used for both the US <kbd>\\</kbd> (on the 101-key layout) and also for the key
/// located between the <kbd>"</kbd> and <kbd>Enter</kbd> keys on row C of the 102-,
/// 104- and 106-key layouts.
/// Labeled <kbd>#</kbd> on a UK (102) keyboard.
Backslash,
/// <kbd>[</kbd> on a US keyboard.
BracketLeft,
/// <kbd>]</kbd> on a US keyboard.
BracketRight,
/// <kbd>,</kbd> on a US keyboard.
Comma,
/// <kbd>0</kbd> on a US keyboard.
Digit0,
/// <kbd>1</kbd> on a US keyboard.
Digit1,
/// <kbd>2</kbd> on a US keyboard.
Digit2,
/// <kbd>3</kbd> on a US keyboard.
Digit3,
/// <kbd>4</kbd> on a US keyboard.
Digit4,
/// <kbd>5</kbd> on a US keyboard.
Digit5,
/// <kbd>6</kbd> on a US keyboard.
Digit6,
/// <kbd>7</kbd> on a US keyboard.
Digit7,
/// <kbd>8</kbd> on a US keyboard.
Digit8,
/// <kbd>9</kbd> on a US keyboard.
Digit9,
/// <kbd>=</kbd> on a US keyboard.
Equal,
/// Located between the left <kbd>Shift</kbd> and <kbd>Z</kbd> keys.
/// Labeled <kbd>\\</kbd> on a UK keyboard.
IntlBackslash,
/// Located between the <kbd>/</kbd> and right <kbd>Shift</kbd> keys.
/// Labeled <kbd>\\</kbd> (ro) on a Japanese keyboard.
IntlRo,
/// Located between the <kbd>=</kbd> and <kbd>Backspace</kbd> keys.
/// Labeled <kbd>¥</kbd> (yen) on a Japanese keyboard. <kbd>\\</kbd> on a
/// Russian keyboard.
IntlYen,
/// <kbd>a</kbd> on a US keyboard.
/// Labeled <kbd>q</kbd> on an AZERTY (e.g., French) keyboard.
KeyA,
/// <kbd>b</kbd> on a US keyboard.
KeyB,
/// <kbd>c</kbd> on a US keyboard.
KeyC,
/// <kbd>d</kbd> on a US keyboard.
KeyD,
/// <kbd>e</kbd> on a US keyboard.
KeyE,
/// <kbd>f</kbd> on a US keyboard.
KeyF,
/// <kbd>g</kbd> on a US keyboard.
KeyG,
/// <kbd>h</kbd> on a US keyboard.
KeyH,
/// <kbd>i</kbd> on a US keyboard.
KeyI,
/// <kbd>j</kbd> on a US keyboard.
KeyJ,
/// <kbd>k</kbd> on a US keyboard.
KeyK,
/// <kbd>l</kbd> on a US keyboard.
KeyL,
/// <kbd>m</kbd> on a US keyboard.
KeyM,
/// <kbd>n</kbd> on a US keyboard.
KeyN,
/// <kbd>o</kbd> on a US keyboard.
KeyO,
/// <kbd>p</kbd> on a US keyboard.
KeyP,
/// <kbd>q</kbd> on a US keyboard.
/// Labeled <kbd>a</kbd> on an AZERTY (e.g., French) keyboard.
KeyQ,
/// <kbd>r</kbd> on a US keyboard.
KeyR,
/// <kbd>s</kbd> on a US keyboard.
KeyS,
/// <kbd>t</kbd> on a US keyboard.
KeyT,
/// <kbd>u</kbd> on a US keyboard.
KeyU,
/// <kbd>v</kbd> on a US keyboard.
KeyV,
/// <kbd>w</kbd> on a US keyboard.
/// Labeled <kbd>z</kbd> on an AZERTY (e.g., French) keyboard.
KeyW,
/// <kbd>x</kbd> on a US keyboard.
KeyX,
/// <kbd>y</kbd> on a US keyboard.
/// Labeled <kbd>z</kbd> on a QWERTZ (e.g., German) keyboard.
KeyY,
/// <kbd>z</kbd> on a US keyboard.
/// Labeled <kbd>w</kbd> on an AZERTY (e.g., French) keyboard, and <kbd>y</kbd> on a
/// QWERTZ (e.g., German) keyboard.
KeyZ,
/// <kbd>-</kbd> on a US keyboard.
Minus,
/// <kbd>.</kbd> on a US keyboard.
Period,
/// <kbd>'</kbd> on a US keyboard.
Quote,
/// <kbd>;</kbd> on a US keyboard.
Semicolon,
/// <kbd>/</kbd> on a US keyboard.
Slash,
/// <kbd>Alt</kbd>, <kbd>Option</kbd>, or <kbd>⌥</kbd>.
AltLeft,
/// <kbd>Alt</kbd>, <kbd>Option</kbd>, or <kbd>⌥</kbd>.
/// This is labeled <kbd>AltGr</kbd> on many keyboard layouts.
AltRight,
/// <kbd>Backspace</kbd> or <kbd>⌫</kbd>.
/// Labeled <kbd>Delete</kbd> on Apple keyboards.
Backspace,
/// <kbd>CapsLock</kbd> or <kbd>⇪</kbd>
CapsLock,
/// The application context menu key, which is typically found between the right
/// <kbd>Super</kbd> key and the right <kbd>Control</kbd> key.
ContextMenu,
/// <kbd>Control</kbd> or <kbd>⌃</kbd>
ControlLeft,
/// <kbd>Control</kbd> or <kbd>⌃</kbd>
ControlRight,
/// <kbd>Enter</kbd> or <kbd>↵</kbd>. Labeled <kbd>Return</kbd> on Apple keyboards.
Enter,
/// The Windows, <kbd>⌘</kbd>, <kbd>Command</kbd>, or other OS symbol key.
SuperLeft,
/// The Windows, <kbd>⌘</kbd>, <kbd>Command</kbd>, or other OS symbol key.
SuperRight,
/// <kbd>Shift</kbd> or <kbd>⇧</kbd>
ShiftLeft,
/// <kbd>Shift</kbd> or <kbd>⇧</kbd>
ShiftRight,
/// <kbd> </kbd> (space)
Space,
/// <kbd>Tab</kbd> or <kbd>⇥</kbd>
Tab,
/// Japanese: <kbd>変</kbd> (henkan)
Convert,
/// Japanese: <kbd>カタカナ</kbd>/<kbd>ひらがな</kbd>/<kbd>ローマ字</kbd>
/// (katakana/hiragana/romaji)
KanaMode,
/// Korean: HangulMode <kbd>한/영</kbd> (han/yeong)
///
/// Japanese (Mac keyboard): <kbd>か</kbd> (kana)
Lang1,
/// Korean: Hanja <kbd>한</kbd> (hanja)
///
/// Japanese (Mac keyboard): <kbd>英</kbd> (eisu)
Lang2,
/// Japanese (word-processing keyboard): Katakana
Lang3,
/// Japanese (word-processing keyboard): Hiragana
Lang4,
/// Japanese (word-processing keyboard): Zenkaku/Hankaku
Lang5,
/// Japanese: <kbd>無変換</kbd> (muhenkan)
NonConvert,
/// <kbd>⌦</kbd>. The forward delete key.
/// Note that on Apple keyboards, the key labelled <kbd>Delete</kbd> on the main part of
/// the keyboard is encoded as [`Backspace`].
///
/// [`Backspace`]: Self::Backspace
Delete,
/// <kbd>Page Down</kbd>, <kbd>End</kbd>, or <kbd>↘</kbd>
End,
/// <kbd>Help</kbd>. Not present on standard PC keyboards.
Help,
/// <kbd>Home</kbd> or <kbd>↖</kbd>
Home,
/// <kbd>Insert</kbd> or <kbd>Ins</kbd>. Not present on Apple keyboards.
Insert,
/// <kbd>Page Down</kbd>, <kbd>PgDn</kbd>, or <kbd>⇟</kbd>
PageDown,
/// <kbd>Page Up</kbd>, <kbd>PgUp</kbd>, or <kbd>⇞</kbd>
PageUp,
/// <kbd>↓</kbd>
ArrowDown,
/// <kbd>←</kbd>
ArrowLeft,
/// <kbd>→</kbd>
ArrowRight,
/// <kbd>↑</kbd>
ArrowUp,
/// On the Mac, this is used for the numpad <kbd>Clear</kbd> key.
NumLock,
/// <kbd>0 Ins</kbd> on a keyboard. <kbd>0</kbd> on a phone or remote control
Numpad0,
/// <kbd>1 End</kbd> on a keyboard. <kbd>1</kbd> or <kbd>1 QZ</kbd> on a phone or remote
/// control
Numpad1,
/// <kbd>2 ↓</kbd> on a keyboard. <kbd>2 ABC</kbd> on a phone or remote control
Numpad2,
/// <kbd>3 PgDn</kbd> on a keyboard. <kbd>3 DEF</kbd> on a phone or remote control
Numpad3,
/// <kbd>4 ←</kbd> on a keyboard. <kbd>4 GHI</kbd> on a phone or remote control
Numpad4,
/// <kbd>5</kbd> on a keyboard. <kbd>5 JKL</kbd> on a phone or remote control
Numpad5,
/// <kbd>6 →</kbd> on a keyboard. <kbd>6 MNO</kbd> on a phone or remote control
Numpad6,
/// <kbd>7 Home</kbd> on a keyboard. <kbd>7 PQRS</kbd> or <kbd>7 PRS</kbd> on a phone
/// or remote control
Numpad7,
/// <kbd>8 ↑</kbd> on a keyboard. <kbd>8 TUV</kbd> on a phone or remote control
Numpad8,
/// <kbd>9 PgUp</kbd> on a keyboard. <kbd>9 WXYZ</kbd> or <kbd>9 WXY</kbd> on a phone
/// or remote control
Numpad9,
/// <kbd>+</kbd>
NumpadAdd,
/// Found on the Microsoft Natural Keyboard.
NumpadBackspace,
/// <kbd>C</kbd> or <kbd>A</kbd> (All Clear). Also for use with numpads that have a
/// <kbd>Clear</kbd> key that is separate from the <kbd>NumLock</kbd> key. On the Mac, the
/// numpad <kbd>Clear</kbd> key is encoded as [`NumLock`].
///
/// [`NumLock`]: Self::NumLock
NumpadClear,
/// <kbd>C</kbd> (Clear Entry)
NumpadClearEntry,
/// <kbd>,</kbd> (thousands separator). For locales where the thousands separator
/// is a "." (e.g., Brazil), this key may generate a <kbd>.</kbd>.
NumpadComma,
/// <kbd>. Del</kbd>. For locales where the decimal separator is "," (e.g.,
/// Brazil), this key may generate a <kbd>,</kbd>.
NumpadDecimal,
/// <kbd>/</kbd>
NumpadDivide,
/// Numpad enter button
NumpadEnter,
/// <kbd>=</kbd>
NumpadEqual,
/// <kbd>#</kbd> on a phone or remote control device. This key is typically found
/// below the <kbd>9</kbd> key and to the right of the <kbd>0</kbd> key.
NumpadHash,
/// <kbd>M</kbd> Add current entry to the value stored in memory.
NumpadMemoryAdd,
/// <kbd>M</kbd> Clear the value stored in memory.
NumpadMemoryClear,
/// <kbd>M</kbd> Replace the current entry with the value stored in memory.
NumpadMemoryRecall,
/// <kbd>M</kbd> Replace the value stored in memory with the current entry.
NumpadMemoryStore,
/// <kbd>M</kbd> Subtract current entry from the value stored in memory.
NumpadMemorySubtract,
/// <kbd>*</kbd> on a keyboard. For use with numpads that provide mathematical
/// operations (<kbd>+</kbd>, <kbd>-</kbd> <kbd>*</kbd> and <kbd>/</kbd>).
///
/// Use `NumpadStar` for the <kbd>*</kbd> key on phones and remote controls.
NumpadMultiply,
/// <kbd>(</kbd> Found on the Microsoft Natural Keyboard.
NumpadParenLeft,
/// <kbd>)</kbd> Found on the Microsoft Natural Keyboard.
NumpadParenRight,
/// <kbd>*</kbd> on a phone or remote control device.
///
/// This key is typically found below the <kbd>7</kbd> key and to the left of
/// the <kbd>0</kbd> key.
///
/// Use <kbd>"NumpadMultiply"</kbd> for the <kbd>*</kbd> key on
/// numeric keypads.
NumpadStar,
/// <kbd>-</kbd>
NumpadSubtract,
/// <kbd>Esc</kbd> or <kbd>⎋</kbd>
Escape,
/// <kbd>Fn</kbd> This is typically a hardware key that does not generate a separate code.
Fn,
/// <kbd>FLock</kbd> or <kbd>FnLock</kbd>. Function Lock key. Found on the Microsoft
/// Natural Keyboard.
FnLock,
/// <kbd>PrtScr SysRq</kbd> or <kbd>Print Screen</kbd>
PrintScreen,
/// <kbd>Scroll Lock</kbd>
ScrollLock,
/// <kbd>Pause Break</kbd>
Pause,
/// Some laptops place this key to the left of the <kbd>↑</kbd> key.
///
/// This also the "back" button (triangle) on Android.
BrowserBack,
/// Some laptops place this key to the right of the <kbd>↑</kbd> key.
BrowserForward,
/// The "home" button on Android.
BrowserHome,
/// <kbd>Eject</kbd> or <kbd>⏏</kbd>. This key is placed in the function section on some Apple
/// keyboards.
Eject,
/// Sometimes labelled <kbd>My Computer</kbd> on the keyboard
LaunchApp1,
/// Sometimes labelled <kbd>Calculator</kbd> on the keyboard
LaunchApp2,
/// This key is placed in the function section on some Apple keyboards, replacing the
/// <kbd>Eject</kbd> key.
Power,
/// Legacy modifier key. Also called "Super" in certain places.
Meta,
/// Legacy modifier key.
Hyper,
/// Found on Sun’s USB keyboard.
Again,
/// Found on Sun’s USB keyboard.
Copy,
/// Found on Sun’s USB keyboard.
Cut,
/// Found on Sun’s USB keyboard.
Find,
/// Found on Sun’s USB keyboard.
Open,
/// Found on Sun’s USB keyboard.
Paste,
/// Found on Sun’s USB keyboard.
Props,
/// Found on Sun’s USB keyboard.
Select,
/// Found on Sun’s USB keyboard.
Undo,
/// Use for dedicated <kbd>ひらがな</kbd> key found on some Japanese word processing keyboards.
Hiragana,
/// Use for dedicated <kbd>カタカナ</kbd> key found on some Japanese word processing keyboards.
Katakana,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F1,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F2,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F3,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F4,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F5,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F6,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F7,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F8,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F9,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F10,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F11,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F12,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F13,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F14,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F15,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F16,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F17,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F18,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F19,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F20,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F21,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F22,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F23,
/// General-purpose function key.
/// Usually found at the top of the keyboard.
F24,
/// General-purpose function key.
F25,
/// General-purpose function key.
F26,
/// General-purpose function key.
F27,
/// General-purpose function key.
F28,
/// General-purpose function key.
F29,
/// General-purpose function key.
F30,
/// General-purpose function key.
F31,
/// General-purpose function key.
F32,
/// General-purpose function key.
F33,
/// General-purpose function key.
F34,
/// General-purpose function key.
F35,
}
/// Stores the current keyboard state
#[derive(Debug, Default)]
pub struct KeyboardInput {
pressed: HashSet<KeyCode>,
just_pressed: HashSet<KeyCode>,
just_released: HashSet<KeyCode>,
}
impl KeyboardInput {
/// Marks a key as pressed
pub fn press(&mut self, key: KeyCode) {
if self.pressed.insert(key) {
self.just_pressed.insert(key);
}
}
/// Marks a key as released
pub fn release(&mut self, key: KeyCode) {
if self.pressed.remove(&key) {
self.just_released.insert(key);
}
}
/// Returns `true` if the key is currently held down
pub fn pressed(&self, key: KeyCode) -> bool {
self.pressed.contains(&key)
}
/// Returns `true` if the key was pressed during this frame
pub fn just_pressed(&self, key: KeyCode) -> bool {
self.just_pressed.contains(&key)
}
/// Returns `true` if the key was released during this frame
pub fn just_released(&self, key: KeyCode) -> bool {
self.just_released.contains(&key)
}
/// Clears the state
pub fn clear(&mut self) {
self.just_pressed.clear();
self.just_released.clear();
}
}
impl KeyCode {
/// Is this key a modifier?
pub fn is_modifier(self) -> bool {
matches!(
self,
KeyCode::ShiftLeft
| KeyCode::ShiftRight
| KeyCode::ControlLeft
| KeyCode::ControlRight
| KeyCode::AltLeft
| KeyCode::AltRight
| KeyCode::SuperLeft
| KeyCode::SuperRight
)
}
}