138 lines
3.0 KiB
Swift
138 lines
3.0 KiB
Swift
import SDL2
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public class Keyboard
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{
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public enum Keys
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{
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case a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z
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case right, left, down, up
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}
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public func keyDown(_ key: Keys) -> Bool
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{
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_keys[Int(key.sdlScancode.rawValue)] & Self._DOWN == Self._DOWN
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}
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public func keyPressed(_ key: Keys, repeat rep: Bool = false) -> Bool
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{
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var state = _keys[Int(key.sdlScancode.rawValue)]
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if rep { state &= ~Self._REPEAT }
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return state == Self._PRESS
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}
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public func keyReleased(_ key: Keys) -> Bool
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{
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_keys[Int(key.sdlKeycode.rawValue)] == Self._RELEASE
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}
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private static let _UP = UInt8(0b000), _DOWN = UInt8(0b010), _IMPULSE = UInt8(0b001)
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private static let _REPEAT = UInt8(0b100)
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private static let _PRESS: UInt8 = _DOWN | _IMPULSE
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private static let _RELEASE: UInt8 = _UP | _IMPULSE
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private var _keys = [UInt8](repeating: _UP, count: Int(SDL_NUM_SCANCODES.rawValue))
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internal func newTick()
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{
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_keys = _keys.map({ $0 & ~(Self._IMPULSE | Self._REPEAT) })
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}
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internal func pressEvent(scan: SDL_Scancode, repeat rep: Bool)
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{
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var newState = Self._PRESS
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if rep { newState |= Self._REPEAT }
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_keys[Int(scan.rawValue)] = newState
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}
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internal func releaseEvent(scan: SDL_Scancode)
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{
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_keys[Int(scan.rawValue)] = Self._RELEASE
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}
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}
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extension Keyboard.Keys
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{
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internal var sdlKeycode: SDL_KeyCode
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{
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switch self
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{
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case .a: SDLK_a
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case .b: SDLK_b
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case .c: SDLK_c
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case .d: SDLK_d
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case .e: SDLK_e
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case .f: SDLK_f
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case .g: SDLK_g
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case .h: SDLK_h
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case .i: SDLK_i
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case .j: SDLK_j
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case .k: SDLK_k
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case .l: SDLK_l
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case .m: SDLK_m
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case .n: SDLK_n
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case .o: SDLK_o
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case .p: SDLK_p
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case .q: SDLK_q
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case .r: SDLK_r
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case .s: SDLK_s
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case .t: SDLK_t
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case .u: SDLK_u
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case .v: SDLK_v
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case .w: SDLK_w
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case .x: SDLK_x
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case .y: SDLK_y
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case .z: SDLK_z
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case .left: SDLK_LEFT
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case .right: SDLK_RIGHT
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case .up: SDLK_UP
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case .down: SDLK_DOWN
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}
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}
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internal var sdlScancode: SDL_Scancode
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{
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switch self
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{
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case .a: SDL_SCANCODE_A
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case .b: SDL_SCANCODE_B
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case .c: SDL_SCANCODE_C
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case .d: SDL_SCANCODE_D
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case .e: SDL_SCANCODE_E
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case .f: SDL_SCANCODE_F
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case .g: SDL_SCANCODE_G
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case .h: SDL_SCANCODE_H
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case .i: SDL_SCANCODE_I
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case .j: SDL_SCANCODE_J
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case .k: SDL_SCANCODE_K
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case .l: SDL_SCANCODE_L
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case .m: SDL_SCANCODE_M
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case .n: SDL_SCANCODE_N
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case .o: SDL_SCANCODE_O
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case .p: SDL_SCANCODE_P
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case .q: SDL_SCANCODE_Q
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case .r: SDL_SCANCODE_R
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case .s: SDL_SCANCODE_S
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case .t: SDL_SCANCODE_T
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case .u: SDL_SCANCODE_U
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case .v: SDL_SCANCODE_V
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case .w: SDL_SCANCODE_W
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case .x: SDL_SCANCODE_X
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case .y: SDL_SCANCODE_Y
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case .z: SDL_SCANCODE_Z
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case .left: SDL_SCANCODE_LEFT
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case .right: SDL_SCANCODE_RIGHT
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case .up: SDL_SCANCODE_UP
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case .down: SDL_SCANCODE_DOWN
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}
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}
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}
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extension SDL_KeyCode
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{
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internal init(scancode: SDL_Scancode)
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{
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self.init(scancode.rawValue | UInt32(SDLK_SCANCODE_MASK))
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}
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}
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