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use crossterm_input::KeyEvent;
use regex::Regex;
use crate::errors::ConfError;
/// what's needed to handle a verb
#[derive(Debug)]
pub struct VerbConf {
pub shortcut: Option<String>,
pub invocation: String,
pub key: Option<KeyEvent>,
pub execution: String,
pub description: Option<String>,
pub from_shell: Option<bool>,
pub leave_broot: Option<bool>,
pub confirm: Option<bool>,
}
fn bad_key(raw: &str) -> Result<KeyEvent, ConfError> {
Err(ConfError::InvalidKey { raw: raw.to_owned() })
}
/// parse a string as a keyboard key definition.
///
/// Note that some mappings allowed by crossterm aren't
/// parsed because we don't want to let the user override
/// the related behaviors.
pub fn parse_key(raw: &str) -> Result<KeyEvent, ConfError> {
lazy_static! {
static ref RE: Regex = Regex::new(
r"(?x)
^
(?P<major>([a-zA-Z]+|\^))
(?:\W?(?P<minor>\w\d?)\W?)?
$
"
)
.unwrap();
}
match RE.captures(raw) {
Some(c) => Ok(match (
c.name("major").unwrap().as_str().to_ascii_lowercase().as_ref(), c.name("minor")
) {
("left", None) => KeyEvent::Left,
("right", None) => KeyEvent::Right,
("up", None) => KeyEvent::Up,
("down", None) => KeyEvent::Down,
("home", None) => KeyEvent::Home,
("end", None) => KeyEvent::End,
("pageup", None) => KeyEvent::PageUp,
("pagedown", None) => KeyEvent::PageDown,
("backtab", None) => KeyEvent::BackTab,
("delete", None) => KeyEvent::Delete,
("insert", None) => KeyEvent::Insert,
("f", Some(minor)) => match minor.as_str().parse() {
Ok(digit) => KeyEvent::F(digit),
_ => bad_key(raw)?
},
("alt", Some(minor)) => KeyEvent::Alt(
minor.as_str().chars().next().unwrap().to_ascii_lowercase()
),
("ctrl", Some(minor)) | ("^", Some(minor)) => KeyEvent::Ctrl(
minor.as_str().chars().next().unwrap().to_ascii_lowercase()
),
// other possible mappings are disabled as they would break basic behaviors of broot
_ => bad_key(raw)?
}),
None => bad_key(raw)
}
}
#[cfg(test)]
mod key_parsing_tests {
use crossterm_input::KeyEvent::*;
use crate::verb_conf::*;
fn check_ok(raw: &str, key: KeyEvent) {
let parsed = parse_key(raw);
assert!(parsed.is_ok(), "failed to parse {:?} as key", raw);
assert_eq!(parsed.unwrap(), key);
}
#[test]
fn check_key_parsing() {
check_ok("left", Left);
check_ok("right", Right);
check_ok("Home", Home);
check_ok("f1", F(1));
check_ok("F2", F(2));
check_ok("F-3", F(3));
check_ok("F(4)", F(4));
check_ok("F 12", F(12));
check_ok("F(12)", F(12));
assert!(parse_key("F(a)").is_err(), "should not have parsed F(a)");
check_ok("Up", Up);
check_ok("down", Down);
check_ok("insert", Insert);
check_ok("alt(4)", Alt('4'));
check_ok("alt-D", Alt('d'));
check_ok("ctrl-q", Ctrl('q'));
check_ok("ctrl-Q", Ctrl('q'));
check_ok("ctrl Q", Ctrl('q'));
check_ok("^Q", Ctrl('q'));
}
}
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