px8 0.0.4

Open source fantasy console in Rust
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use std::fmt;

use sdl2::controller::{Axis, Button};
use sdl2::keyboard::Keycode;

#[derive(Eq, PartialEq, Hash, Clone, Copy)]
pub enum PX8Key {
    Right,
    Left,
    Up,
    Down,
    O,
    X,
    Pause,
    Enter,
}

impl fmt::Debug for PX8Key {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        use self::PX8Key::*;

        write!(f, "{}", match *self {
            Right => "RIGHT",
            Left => "LEFT",
            Up => "UP",
            Down => "DOWN",
            O => "O",
            X => "X",
            Pause => "Pause",
            Enter => "Enter",
        })

    }
}

pub fn map_button(button: Button) -> Option<PX8Key> {
    match button {
        Button::DPadRight => Some(PX8Key::Right),
        Button::DPadLeft => Some(PX8Key::Left),
        Button::DPadUp => Some(PX8Key::Up),
        Button::DPadDown => Some(PX8Key::Down),
        Button::A => Some(PX8Key::O),
        Button::B => Some(PX8Key::X),
        _ => None,
    }
}

pub fn map_button_joystick(button: u8) -> Option<PX8Key> {
    match button {
        0 => Some(PX8Key::O),
        1 => Some(PX8Key::X),
        _ => None,
    }
}

pub fn map_keycode(key: Keycode) -> (Option<PX8Key>, u8) {
    match key {
        Keycode::Right => (Some(PX8Key::Right), 0),
        Keycode::Left => (Some(PX8Key::Left), 0),
        Keycode::Up => (Some(PX8Key::Up), 0),
        Keycode::Down => (Some(PX8Key::Down), 0),

        Keycode::Z | Keycode::C | Keycode::N => (Some(PX8Key::O), 0),
        Keycode::X | Keycode::V | Keycode::M => (Some(PX8Key::X), 0),

        Keycode::F => (Some(PX8Key::Right), 1),
        Keycode::S => (Some(PX8Key::Left), 1),
        Keycode::E => (Some(PX8Key::Up), 1),
        Keycode::D => (Some(PX8Key::Down), 1),

        Keycode::LShift | Keycode::Tab => (Some(PX8Key::O), 1),

        Keycode::A | Keycode::Q => (Some(PX8Key::X), 1),

        Keycode::P => (Some(PX8Key::Pause), 0),

        Keycode::KpEnter | Keycode::Return => (Some(PX8Key::Enter), 0),

        _ => (None, 0),
    }
}

pub fn map_axis(axis: Axis, value: i16) -> Option<(PX8Key, bool)> {
    match axis {
        Axis::LeftX => {
            match value {
                -32768...-16384 => Some((PX8Key::Left, true)),
                -16383...-1 => Some((PX8Key::Left, false)),
                0...16383 => Some((PX8Key::Right, false)),
                16384...32767 => Some((PX8Key::Right, true)),
                _ => None,
            }
        }

        Axis::LeftY => {
            match value {
                -32768...-16384 => Some((PX8Key::Up, true)),
                -16383...-1 => Some((PX8Key::Up, false)),
                0...16383 => Some((PX8Key::Down, false)),
                16384...32767 => Some((PX8Key::Down, true)),
                _ => None,
            }
        }
        _ => None,
    }
}

pub fn map_axis_joystick(axis: u8, value: i16) -> Option<(PX8Key, bool)> {
    match axis {
        0 => {
            match value {
                -32768...-16384 => Some((PX8Key::Left, true)),
                -16383...-1 => Some((PX8Key::Left, false)),
                1...16383 => Some((PX8Key::Right, false)),
                16384...32767 => Some((PX8Key::Right, true)),
                _ => None,
            }
        }

        1 => {
            match value {
                -32768...-16384 => Some((PX8Key::Up, true)),
                -16383...-1 => Some((PX8Key::Up, false)),
                1...16383 => Some((PX8Key::Down, false)),
                16384...32767 => Some((PX8Key::Down, true)),
                _ => None,
            }
        }
        _ => None,
    }
}