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add RenderThunk, LayoutThunk, Map::new, fold some components into arranger methods

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🪞👃🪞 2025-01-07 17:38:28 +01:00
parent 38e2e64751
commit b2fb71b405
8 changed files with 268 additions and 178 deletions
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24
engine/src/thunk.rs
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@ -1,10 +1,28 @@
use crate::*;
use std::marker::PhantomData;
/// Lazily-evaluated [Render]able.
pub struct Thunk<E: Output, T: Render<E>, F: Fn()->T + Send + Sync>(F, PhantomData<E>);
pub struct Thunk<E: Output, T: Render<E>, F: Fn()->T + Send + Sync>(PhantomData<E>, F);
impl<E: Output, T: Render<E>, F: Fn()->T + Send + Sync> Thunk<E, T, F> {
pub fn new (thunk: F) -> Self { Self(thunk, Default::default()) }
pub fn new (thunk: F) -> Self { Self(Default::default(), thunk) }
}
impl<E: Output, T: Render<E>, F: Fn()->T + Send + Sync> Content<E> for Thunk<E, T, F> {
fn content (&self) -> impl Render<E> { (self.0)() }
fn content (&self) -> impl Render<E> { (self.1)() }
}
pub struct RenderThunk<E: Output, F: Fn(&mut E) + Send + Sync>(PhantomData<E>, F);
impl<E: Output, F: Fn(&mut E) + Send + Sync> RenderThunk<E, F> {
pub fn new (render: F) -> Self { Self(Default::default(), render) }
}
impl<E: Output, F: Fn(&mut E) + Send + Sync> Content<E> for RenderThunk<E, F> {
fn render (&self, to: &mut E) { (self.1)(to) }
}
pub struct LayoutThunk<E: Output, F1: Fn(E::Area)->E::Area + Send + Sync, F2: Fn(&mut E) + Send + Sync>(PhantomData<E>, F1, F2);
impl<E: Output, F1: Fn(E::Area)->E::Area + Send + Sync, F2: Fn(&mut E) + Send + Sync> LayoutThunk<E, F1, F2> {
pub fn new (layout: F1, render: F2) -> Self { Self(Default::default(), layout, render) }
}
impl<E: Output, F1: Fn(E::Area)->E::Area + Send + Sync, F2: Fn(&mut E) + Send + Sync> Content<E> for LayoutThunk<E, F1, F2> {
fn layout (&self, to: E::Area) -> E::Area { (self.1)(to) }
fn render (&self, to: &mut E) { (self.2)(to) }
}