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refactor engine and layout into input and output

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🪞👃🪞 2025-01-07 21:30:07 +01:00
parent f052891473
commit 4d0f98acd2
40 changed files with 104 additions and 109 deletions
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43
engine/src/event_map.rs
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@ -1,43 +0,0 @@
use crate::*;
pub struct EventMap<'a, S, I: PartialEq, C> {
pub bindings: &'a [(I, &'a dyn Fn(&S) -> Option<C>)],
pub fallback: Option<&'a dyn Fn(&S, &I) -> Option<C>>
}
impl<'a, S, I: PartialEq, C> EventMap<'a, S, I, C> {
pub fn handle (&self, state: &S, input: &I) -> Option<C> {
for (binding, handler) in self.bindings.iter() {
if input == binding {
return handler(state)
}
}
if let Some(fallback) = self.fallback {
fallback(state, input)
} else {
None
}
}
}
#[macro_export] macro_rules! keymap {
(
$(<$lt:lifetime>)? $KEYS:ident = |$state:ident: $State:ty, $input:ident: $Input:ty| $Command:ty
{ $($key:expr => $handler:expr),* $(,)? } $(,)?
) => {
pub const $KEYS: EventMap<'static, $State, $Input, $Command> = EventMap {
fallback: None,
bindings: &[ $(($key, &|$state|Some($handler)),)* ]
};
input_to_command!($(<$lt>)? $Command: |$state: $State, input: $Input|$KEYS.handle($state, input)?);
};
(
$(<$lt:lifetime>)? $KEYS:ident = |$state:ident: $State:ty, $input:ident: $Input:ty| $Command:ty
{ $($key:expr => $handler:expr),* $(,)? }, $default:expr
) => {
pub const $KEYS: EventMap<'static, $State, $Input, $Command> = EventMap {
fallback: Some(&|$state, $input|Some($default)),
bindings: &[ $(($key, &|$state|Some($handler)),)* ]
};
input_to_command!($(<$lt>)? $Command: |$state: $State, input: $Input|$KEYS.handle($state, input)?);
};
}