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Add a ViewContext::defer

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This takes a closure that will be enqueued as an effect to ensure there are no entities on the stack.
This commit is contained in:
Nathan Sobo 2022-01-22 13:14:25 -07:00
parent b1931fbf5d
commit 8b04c5d3ac
1 changed files with 16 additions and 0 deletions
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16
crates/gpui/src/app.rs
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@ -1060,6 +1060,10 @@ impl MutableAppContext {
}
}
fn defer(&mut self, callback: Box<dyn FnOnce(&mut MutableAppContext)>) {
self.pending_effects.push_back(Effect::Deferred(callback))
}
pub(crate) fn notify_model(&mut self, model_id: usize) {
if self.pending_notifications.insert(model_id) {
self.pending_effects
@ -1443,6 +1447,7 @@ impl MutableAppContext {
Effect::ViewNotification { window_id, view_id } => {
self.notify_view_observers(window_id, view_id)
}
Effect::Deferred(callback) => callback(self),
Effect::Release { entity_id } => self.notify_release_observers(entity_id),
Effect::Focus { window_id, view_id } => {
self.focus(window_id, view_id);
@ -1876,6 +1881,7 @@ pub enum Effect {
window_id: usize,
view_id: usize,
},
Deferred(Box<dyn FnOnce(&mut MutableAppContext)>),
Release {
entity_id: usize,
},
@ -1905,6 +1911,7 @@ impl Debug for Effect {
.field("window_id", window_id)
.field("view_id", view_id)
.finish(),
Effect::Deferred(_) => f.debug_struct("Effect::Deferred").finish(),
Effect::Release { entity_id } => f
.debug_struct("Effect::Release")
.field("entity_id", entity_id)
@ -2410,6 +2417,15 @@ impl<'a, T: View> ViewContext<'a, T> {
self.app.notify_view(self.window_id, self.view_id);
}
pub fn defer(&mut self, callback: impl 'static + FnOnce(&mut T, &mut ViewContext<T>)) {
let handle = self.handle();
self.app.defer(Box::new(move |cx| {
handle.update(cx, |view, cx| {
callback(view, cx);
})
}))
}
pub fn propagate_action(&mut self) {
self.halt_action_dispatch = false;
}