rustedbytes-bytepusher 0.1.0

use minifb::{Key, KeyRepeat, Window};
use std::cell::RefCell;
use std::rc::Rc;

use crate::memory::Memory;

pub struct KeyboardHandler {
    keyboard_state: u16,
    memory_register_addr: usize,
    memory: Rc<RefCell<Memory>>,
    window: Rc<RefCell<Window>>,
}

impl KeyboardHandler {
    pub fn new(
        memory_register_addr: usize,
        window: Rc<RefCell<Window>>,
        memory: Rc<RefCell<Memory>>,
    ) -> Self {
        Self {
            keyboard_state: 0,
            memory,
            memory_register_addr,
            window,
        }
    }

    pub fn handle_events(&mut self) {
        let window = self.window.borrow();
        for key in window.get_keys_pressed(KeyRepeat::No) {
            if let Some(hex) = Self::key_to_hex(key) {
                self.keyboard_state |= 1 << hex;
            }
        }
        for key in window.get_keys_released() {
            if let Some(hex) = Self::key_to_hex(key) {
                self.keyboard_state &= !(1 << hex);
            }
        }

        self.memory
            .borrow_mut()
            .write_16_bits(self.memory_register_addr, self.keyboard_state);
    }

    pub fn key_to_hex(key: Key) -> Option<u8> {
        match key {
            Key::Key1 => Some(0x1),
            Key::Key2 => Some(0x2),
            Key::Key3 => Some(0x3),
            Key::Key4 => Some(0xC),
            Key::Q => Some(0x4),
            Key::W => Some(0x5),
            Key::E => Some(0x6),
            Key::R => Some(0xD),
            Key::A => Some(0x7),
            Key::S => Some(0x8),
            Key::D => Some(0x9),
            Key::F => Some(0xE),
            Key::Z => Some(0xA),
            Key::X => Some(0x0),
            Key::C => Some(0xB),
            Key::V => Some(0xF),
            _ => None,
        }
    }
}