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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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45
engine/src/command.rs
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@ -1,45 +0,0 @@
use crate::*;
pub trait Command<S>: Send + Sync + Sized {
fn execute (self, state: &mut S) -> Perhaps<Self>;
fn delegate <T> (self, state: &mut S, wrap: impl Fn(Self)->T) -> Perhaps<T> {
Ok(self.execute(state)?.map(wrap))
}
}
#[macro_export] macro_rules! input_to_command {
(<$($l:lifetime),+> $Command:ty: |$state:ident:$State:ty, $input:ident:$Input:ty| $handler:expr) => {
impl<$($l),+> InputToCommand<$Input, $State> for $Command {
fn input_to_command ($state: &$State, $input: &$Input) -> Option<Self> {
Some($handler)
}
}
};
($Command:ty: |$state:ident:$State:ty, $input:ident:$Input:ty| $handler:expr) => {
impl InputToCommand<$Input, $State> for $Command {
fn input_to_command ($state: &$State, $input: &$Input) -> Option<Self> {
Some($handler)
}
}
}
}
pub trait InputToCommand<I, S>: Command<S> + Sized {
fn input_to_command (state: &S, input: &I) -> Option<Self>;
fn execute_with_state (state: &mut S, input: &I) -> Perhaps<bool> {
Ok(if let Some(command) = Self::input_to_command(state, input) {
let _undo = command.execute(state)?;
Some(true)
} else {
None
})
}
}
#[macro_export] macro_rules! command {
($(<$($l:lifetime),+>)?|$self:ident:$Command:ty,$state:ident:$State:ty|$handler:expr) => {
impl$(<$($l),+>)? Command<$State> for $Command {
fn execute ($self, $state: &mut $State) -> Perhaps<Self> {
Ok($handler)
}
}
};
}