Manuel Cillero
bf3ea43b53
Los traits `ExtensionTrait`, `ThemeTrait` y `ComponentTrait` pasan a ser `Extension`, `Theme`y `Component`, respectivamente,
50 lines
1.5 KiB
Rust
50 lines
1.5 KiB
Rust
use crate::prelude::*;
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use crate::base::action::FnActionWithComponent;
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/// Ejecuta [`FnActionWithComponent`] antes de que un tema renderice el componente.
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pub struct BeforeRender<C: Component> {
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f: FnActionWithComponent<C>,
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theme_type_id: Option<UniqueId>,
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referer_type_id: Option<UniqueId>,
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}
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/// Filtro para despachar [`FnActionWithComponent`] antes de que un tema renderice el componente
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/// `C`.
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impl<C: Component> ActionDispatcher for BeforeRender<C> {
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/// Devuelve el identificador de tipo ([`UniqueId`]) del tema.
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fn theme_type_id(&self) -> Option<UniqueId> {
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self.theme_type_id
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}
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/// Devuelve el identificador de tipo ([`UniqueId`]) del componente `C`.
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fn referer_type_id(&self) -> Option<UniqueId> {
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self.referer_type_id
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}
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}
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impl<C: Component> BeforeRender<C> {
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/// Permite [registrar](Extension::actions) una nueva acción [`FnActionWithComponent`] para un
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/// tema dado.
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pub fn new(theme: ThemeRef, f: FnActionWithComponent<C>) -> Self {
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BeforeRender {
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f,
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theme_type_id: Some(theme.type_id()),
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referer_type_id: Some(UniqueId::of::<C>()),
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}
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}
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// Despacha las acciones.
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#[inline]
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pub(crate) fn dispatch(component: &mut C, cx: &mut Context) {
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dispatch_actions(
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&ActionKey::new(
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UniqueId::of::<Self>(),
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Some(cx.theme().type_id()),
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Some(UniqueId::of::<C>()),
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None,
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),
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|action: &Self| (action.f)(component, cx),
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);
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}
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}
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