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Add View::update which provides a ViewContext

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This commit is contained in:
Nathan Sobo 2023-10-26 19:41:42 +02:00
parent 8e3314e680
commit a1c3826858
17 changed files with 403 additions and 247 deletions
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62
crates/gpui2/src/gpui2.rs
View file

@ -87,6 +87,25 @@ pub trait Context {
) -> Self::Result<R>;
}
pub trait VisualContext: Context {
type ViewContext<'a, 'w, V>;
fn build_view<E, V>(
&mut self,
build_entity: impl FnOnce(&mut Self::ViewContext<'_, '_, V>) -> V,
render: impl Fn(&mut V, &mut ViewContext<'_, '_, V>) -> E + Send + 'static,
) -> Self::Result<View<V>>
where
E: Component<V>,
V: 'static + Send;
fn update_view<V: 'static, R>(
&mut self,
view: &View<V>,
update: impl FnOnce(&mut V, &mut Self::ViewContext<'_, '_, V>) -> R,
) -> Self::Result<R>;
}
pub enum GlobalKey {
Numeric(usize),
View(EntityId),
@ -149,6 +168,49 @@ impl<C: Context> Context for MainThread<C> {
}
}
impl<C: VisualContext> VisualContext for MainThread<C> {
type ViewContext<'a, 'w, V> = MainThread<C::ViewContext<'a, 'w, V>>;
fn build_view<E, V>(
&mut self,
build_entity: impl FnOnce(&mut Self::ViewContext<'_, '_, V>) -> V,
render: impl Fn(&mut V, &mut ViewContext<'_, '_, V>) -> E + Send + 'static,
) -> Self::Result<View<V>>
where
E: Component<V>,
V: 'static + Send,
{
self.0.build_view(
|cx| {
let cx = unsafe {
mem::transmute::<
&mut C::ViewContext<'_, '_, V>,
&mut MainThread<C::ViewContext<'_, '_, V>>,
>(cx)
};
build_entity(cx)
},
render,
)
}
fn update_view<V: 'static, R>(
&mut self,
view: &View<V>,
update: impl FnOnce(&mut V, &mut Self::ViewContext<'_, '_, V>) -> R,
) -> Self::Result<R> {
self.0.update_view(view, |view_state, cx| {
let cx = unsafe {
mem::transmute::<
&mut C::ViewContext<'_, '_, V>,
&mut MainThread<C::ViewContext<'_, '_, V>>,
>(cx)
};
update(view_state, cx)
})
}
}
pub trait BorrowAppContext {
fn with_text_style<F, R>(&mut self, style: TextStyleRefinement, f: F) -> R
where