allow custom key bindings via a config file

[mokurin000]

piano-rs/src/game/notes.rs

Lines 94 to 165 in 2997bee

	pub fn key_to_base_note(mut key: KeyEvent, sequence: i8) -> Option<String> {
	let mut offset: i8 = 0;
	let keys = ['z', 's', 'x', 'c', 'f', 'v', 'g', 'b', 'n',
	'j', 'm', 'k', '1', ',', 'q', 'l', '2', '.',
	'w', '/', 'e', '\'', '4', 'r', '5', 't', 'y',
	'7', 'u', '8', 'i', '9', 'o', 'p', '[', ']', 'a'];
	let base_sounds = ["a", "as", "b", "c", "cs", "d", "ds", "e", "f",
	"fs", "g", "gs", "gs", "a", "a", "as", "as", "b",
	"b", "c", "c", "cs", "cs", "d", "ds", "e", "f",
	"fs", "g", "gs", "a", "as", "b", "c", "d", "e", "gs"];
	let factors = [-1, -1, -1, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 1, 1, 1, 1, 1, 1, 1, 1,
	1, 1, 1, 1, 1, 1, 2, 2, 2, -1];
	let special = ['!', '@', '$', '%', '&', '*', '(', '"', '<',
	'>', '?', '{', '}'];
	let special_matches = ['1', '2', '4', '5', '7', '8', '9', '\'', ',',
	'.', '/', '[', ']'];
	// Handle terminal control characters
	if key == KeyEvent::Enter {
	// Ctrl+m sends Enter in terminal
	key = KeyEvent::Ctrl('m');
	} else if key == KeyEvent::Tab {
	// Ctrl+i sends Tab in terminal
	key = KeyEvent::Ctrl('i');
	}
	// Translate Ctrl+<character> to <character>
	if let KeyEvent::Ctrl(c) = key {
	key = KeyEvent::Char(c);
	offset -= 1;
	}
	// Increment `offset` if key was shift prefixed (Shift+<character>)
	let note: Option<String> = if let KeyEvent::Char(mut c) = key {
	if c.is_uppercase() {
	c = c.to_ascii_lowercase();
	offset += 1;
	} else if special.contains(&c) {
	let j = special.iter()
	.position(|&key| key == c)
	.unwrap();
	c = special_matches[j];
	offset += 1;
	}
	if let Some(i) = keys.iter().position(|&key| key == c) {
	let factor = factors[i];
	let base_note = format!("{}{}",
	base_sounds[i].to_string(),
	offset + factor + sequence
	);
	Some(base_note)
	} else {
	None
	}
	} else {
	None
	};
	note
	}

• toml - much more human-friendly config format, I mean not such easy to break like yaml
• OnceLock for once init of key bind map; may not need to be thread-safe?
• FxHashMap for keymapping

related issue: #23