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Introduce rebuild_element helper in lazy::pure::Component

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This commit is contained in:
Héctor Ramón Jiménez 2022-03-07 16:39:04 +07:00
parent fa3bd4280e
commit 9fd66c820d
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GPG key ID: 140CC052C94F138E
1 changed files with 16 additions and 26 deletions
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42
lazy/src/pure/component.rs
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@ -90,6 +90,20 @@ impl<'a, Message, Renderer, Event, S> Instance<'a, Message, Renderer, Event, S>
where
S: Default,
{
fn rebuild_element(&self, state: &S) {
let heads = self.state.borrow_mut().take().unwrap().into_heads();
*self.state.borrow_mut() = Some(
StateBuilder {
component: heads.component,
message: PhantomData,
state: PhantomData,
element_builder: |component| Some(component.view(state)),
}
.build(),
);
}
fn with_element<T>(
&self,
f: impl FnOnce(&Element<'_, Event, Renderer>) -> T,
@ -124,36 +138,12 @@ where
}
fn children(&self) -> Vec<Tree> {
let heads = self.state.borrow_mut().take().unwrap().into_heads();
*self.state.borrow_mut() = Some(
StateBuilder {
component: heads.component,
message: PhantomData,
state: PhantomData,
element_builder: |state| Some(state.view(&S::default())),
}
.build(),
);
self.rebuild_element(&S::default());
self.with_element(|element| vec![Tree::new(element)])
}
fn diff(&self, tree: &mut Tree) {
let heads = self.state.borrow_mut().take().unwrap().into_heads();
*self.state.borrow_mut() = Some(
StateBuilder {
component: heads.component,
message: PhantomData,
state: PhantomData,
element_builder: |state| {
Some(state.view(tree.state.downcast_ref()))
},
}
.build(),
);
self.rebuild_element(tree.state.downcast_ref());
self.with_element(|element| {
tree.diff_children(std::slice::from_ref(&element))
})