51 lines
1.5 KiB
Rust
51 lines
1.5 KiB
Rust
use crate::prelude::*;
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use super::FnActionWithComponent;
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/// Ejecuta [`FnActionWithComponent`] antes de renderizar el componente.
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pub struct BeforeRender<C: Component> {
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f: FnActionWithComponent<C>,
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referer: ActionReferer,
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weight: Weight,
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}
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// Filtro para despachar `FnActionWithComponent` antes de renderizar un componente `C`.
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impl<C: Component> ActionDispatcher for BeforeRender<C> {
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fn referer(&self) -> Option<&ActionReferer> {
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Some(&self.referer)
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}
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fn weight(&self) -> Weight {
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self.weight
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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`].
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pub fn new(f: FnActionWithComponent<C>) -> Self {
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BeforeRender {
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f,
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referer: ActionReferer::of::<C>(),
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weight: 0,
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}
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}
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/// Afina el registro para ejecutar la acción [`FnActionWithComponent`] sólo para el componente
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/// `C` con identificador `id`.
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pub fn filter_by_referer_id(mut self, id: impl AsRef<str>) -> Self {
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self.referer = self.referer.with_id(id);
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self
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}
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/// Opcional. Acciones con pesos más bajos se aplican antes. Se pueden usar valores negativos.
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pub fn with_weight(mut self, value: Weight) -> Self {
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self.weight = value;
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self
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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_referer(component, |c| c.id(), |action: &Self, c| (action.f)(c, cx));
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}
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}
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