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fix: signals mark subscribers dirty, but don't say they're always dirty if they haven't changed

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This commit is contained in:
Greg Johnston 2024-06-22 09:11:55 -04:00
parent f9ee36a27e
commit 7094dee150
1 changed files with 16 additions and 6 deletions
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22
reactive_graph/src/signal/subscriber_traits.rs
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@ -57,14 +57,19 @@ impl<T: AsSubscriberSet + DefinedAt> ReactiveNode for T {
if let Some(inner) = self.as_subscriber_set() { if let Some(inner) = self.as_subscriber_set() {
let subs = inner.borrow().write().unwrap().take(); let subs = inner.borrow().write().unwrap().take();
for sub in subs { for sub in subs {
sub.mark_check(); sub.mark_dirty();
} }
} }
} }
fn update_if_necessary(&self) -> bool { fn update_if_necessary(&self) -> bool {
// if they're being checked, signals always count as "dirty" // a signal will always mark its dependents Dirty when it runs, so they know
true // that they may have changed and need to check themselves at least
//
// however, it's always possible that *another* signal or memo has triggered any
// given effect/memo, and so this signal should *not* say that it is dirty, as it
// may also be checked but has not changed
false
} }
} }
@ -117,13 +122,18 @@ impl ReactiveNode for RwLock<SubscriberSet> {
fn mark_subscribers_check(&self) { fn mark_subscribers_check(&self) {
let subs = self.write().unwrap().take(); let subs = self.write().unwrap().take();
for sub in subs { for sub in subs {
sub.mark_check(); sub.mark_dirty();
} }
} }
fn update_if_necessary(&self) -> bool { fn update_if_necessary(&self) -> bool {
// if they're being checked, signals always count as "dirty" // a signal will always mark its dependents Dirty when it runs, so they know
true // that they may have changed and need to check themselves at least
//
// however, it's always possible that *another* signal or memo has triggered any
// given effect/memo, and so this signal should *not* say that it is dirty, as it
// may also be checked but has not changed
false
} }
} }