Summary:
Changelog: [Internal]
Order of events dispatched to JS matter. If we remove duplicate events, we shouldn't change order of types.
So If we have order of events
A -> B -> C
and inserting a new event A for the same target, we shouldn't delete the first A, as there might be logic that depends on event B being preceded by A.
What we can do though, is delete previous event of the same type and target in queue if we would be adding subsequent event.
So when we have events
A -> B -> C
and we are about to add event C to the queue which goes to the same target, we can delete the first C before inserting the new one.
Reviewed By: shergin
Differential Revision: D22135931
fbshipit-source-id: 1dadd1688516330be07c4251f446f77ca08eaa87
Summary:
Changelog: [Internal]
`BatchedEventQueue::enqueueUniqueEvent` goes over event queue and deletes previous event of the same type and same target.
This is useful for ScrollView for example where only the latest event is relevant.
This only affects ScrollView scroll event, other events take the original code path.
Reviewed By: mdvacca
Differential Revision: D21648906
fbshipit-source-id: a80ad652058fd50ebb55e24a87229cdc1764b591
Summary:
Changelog: [Internal]
Separates EventQueues from an array into 4 ivars.
EventQueues are of different type, in the future we will want to call different methods on different kind of EventQueue.
Reviewed By: shergin
Differential Revision: D21648905
fbshipit-source-id: 90ae65edb8a9276eecfea9770f554d8c56804797
Summary:
Changelog: [Internal]
Using `empty()` vs `size() == 0` or `size() > 0`.
It is a more semantic way to check whether container is empty or not.
Reviewed By: JoshuaGross
Differential Revision: D21573183
fbshipit-source-id: b83283f687432a037941852114717a0f014e28db
Summary:
Changelog: [Internal]
As agreed in https://fb.quip.com/Oh2mAaTAbBj6, `findNodeAtPoint` now calls callback with `shadowNode` instead of `instanceHandle`.
Reviewed By: shergin
Differential Revision: D20097269
fbshipit-source-id: bd2a1bcd26ab2510f16c3e73f628be4b1f7dacfc
Summary:
This change removes the concept of `StateTarget`, replacing its role with `ShadowNodeFamily`.
When `StateTarget` was built, we didn't have a concept of `Family`, and when we added it we introduced a retain-cycle: ShadowNode -> Family -> StateTarget -> ShadowNode. This diff fixes that.
This change does not change conceptually how the state behaves, it just adjusts internal machinery.
Changelog: [Internal] Fabric-specific internal change.
Reviewed By: sammy-SC
Differential Revision: D19799013
fbshipit-source-id: c1360bfbf6b8ac34e2a856a40047eafeb50ed070
Summary:
This diff exposes eventTarget on the EventEmitter API
Changelog: [internal]
Reviewed By: shergin
Differential Revision: D19190281
fbshipit-source-id: 00dc8cf64f42b1fe176ecb7beefad59e61bd53ca
Summary:
When we designed the Fabric's event priorities we followed the model "let's assign all priorities to all events as they should theoretically be and create a flag that disables sync execution (because we were unsure that it's stable enough". After some experiments, it's clear that this model is not feasible. We realized that we were often not sure about the exact event priority that should be assigned to a particular event. We also realized that the priorities in web work differently compare to RN. And we are not sure how we should ensure ordering among events in different queues with different priorities.
At the same time, we want to use (or experiment with) sync events for in some cases when we sure about desired behavior and/or where async events make no sense.
This diff deletes the macro that disables sync priorities and explicitly assigns async priorities to events that previously had sync ones.
The actual behavior should not change.
Changelog: [Internal] Fabric-specific internal change.
Reviewed By: sammy-SC
Differential Revision: D18950431
fbshipit-source-id: 4033ef63d4e736075b525a693cd514d7b92d5bb0
Summary:
The documentation for the method says that it must be called from a subclass, but the methods wasn't marked as protected.
Calling `beat` directly will bypass custom logic implemented in subclasses (because it's not a virtual function (by-design)). That's practically what happened before and what the previous diffs in the stack fix.
Changelog: [Internal]
Reviewed By: JoshuaGross
Differential Revision: D18339594
fbshipit-source-id: 3d8c53b69e1b72d447714dd91c9392bdfb05b9ae
Summary: We merge `events` module into `core` long time ago, so we don't need this anymore.
Reviewed By: mdvacca
Differential Revision: D17142174
fbshipit-source-id: 6e63f7f22dc3d65ed2f9cc3bd4f4776404dfe788
Summary:
The purpose of `EventBeat` is handling an asynchronous callback to itself which is being delivered on some different thread. That brings a challenge of ensuring that the `EventBeat` object stays valid during the timeframe of callback execution. The concept of Owner helps with that.
The owner is a shared pointer that retains (probably indirectly) the `EventBeat` object. To ensure the correctness of the call, `EventBeat` retains the owner (practically creating a retain cycle) during executing the callback. In case if the pointer to the owner already null, `EventBeat` skips executing the callback.
It's impossible to retain itself directly or refer to the shared pointer to itself from a constructor. `OwnerBox` is designed to work around this issue; it allows to store the pointer later, right after the creation of some other object that owns an `EventBeat`.
Reviewed By: JoshuaGross
Differential Revision: D17128549
fbshipit-source-id: 7ed34fd865430975157fd362f51c4a3d64214430
Summary: We don't use it anymore. (And that was debug only concept.)
Reviewed By: sammy-SC
Differential Revision: D17115538
fbshipit-source-id: 20aac5457e37666cbf9ca9f62cdfca411026c219
Summary: We don't use it anymore.
Reviewed By: JoshuaGross
Differential Revision: D17115539
fbshipit-source-id: e1fa5cc023cd27e53307aa0ea8eae0bad5413be3
Summary:
We are not sure yet how exactly this should work semantically (e.g. should unbatched events flash previously dispatched batched or not).
So, let's disable that until we have all answers.
Reviewed By: mdvacca
Differential Revision: D15498191
fbshipit-source-id: 77f07c5e86bfbfd212505df8cc6530e39531b5ef
Summary:
Previously, all placeholders methods have return type `SomeType &` which is not correct because it allows the called to modify enclosed `static` value of the placeholders; the type should be `SomeType const &`.
Besides that this diff migrates some type aliases to the new style (which makes evething much prettier and readable).
Reviewed By: mdvacca
Differential Revision: D14819076
fbshipit-source-id: 87e68d546f16d7a9ad1fb65e1b238859f9381eb7
Summary:
This pull request removes the designated initializers in `react/mounting/**` and `react/events/**` to improve portability.
A destructor was also defined for `ShadowView` to fix this error:
```
ShadowViewMutation.cpp:14: error: undefined reference to 'facebook::react::ShadowView::~ShadowView()'
ShadowViewMutation.cpp:24: error: undefined reference to 'facebook::react::ShadowView::~ShadowView()'
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
```
[General] [Changed] - Fabric: Remove designated initializers in Events and Mounting
Pull Request resolved: https://github.com/facebook/react-native/pull/23441
Differential Revision: D14298890
Pulled By: shergin
fbshipit-source-id: f5d8fc6e1f5968b94e8bb3ca0c3f0e81cf892f83
Summary:
In React Native there are several use cases where React State is not the only input that affects the component tree. E.g., in case of a <Modal> component, the screen size directly affects the layout of components inside modal; in the case of uncontrolled <TextInput> component, the text inside the input affects the layout of the surrounding components. `State` is a special (legit!) workaround for all those similar cases. Native part of React Native maintains a special shared object between all nodes of the same family and use that during cloning and commits.
See coming commits to know how to use that.
In the near future State will fully replace LocalData concept but for simplicity they both exist for now.
Reviewed By: mdvacca
Differential Revision: D14217184
fbshipit-source-id: 6e018c5b68208d662462013bce0f4e2733d2f673
Summary:
A couple of small changes:
1. `onEnqueue` was decoupled from `enqueueEvent` for easier and unified overiding in subclasses (other methods will call `onEnqueue` soon);
2. `flushEvents` was decoupled from `onBeat` (we will put more stuff into `onBeat` soon).
Reviewed By: mdvacca
Differential Revision: D14205769
fbshipit-source-id: 574c2b2caaa6432bc7782b2f3bc147fa1fb82bd3
Summary: That's bummer that we have to do it, but it's actually reasonable. Files in `core` and `events` depend on each other creating circular dependencies and other similar hard problem.
Reviewed By: mdvacca
Differential Revision: D14195022
fbshipit-source-id: 96a44ae28631cc9ccd7d7de72a94526f9e0dd12a
Summary:
@public
We need that because gonna add much more event-related stuff, so it deserves separate buck target.
Reviewed By: mdvacca
Differential Revision: D8831547
fbshipit-source-id: 616581b39b425a49302d5f7f86267e62b0d58389
Summary:
Removes the concept of instance handle. Instead we pass the event target
to createNode and don't pass it to subsequent clones.
The life time of the event target is managed by native (the event emitter).
It has to be released manually.
Reviewed By: shergin
Differential Revision: D8688330
fbshipit-source-id: e11b61f147ea9ca4dfb453fe07063ed06f24b7ac
Summary:
@public
After reading about move-semantic and rvalue refs I realized that we (I) definitely overuse `auto &&` (aka universal reference) construction. Even if this is harmless, does not look good and idiomatic.
Whenever I used that from a semantical point of view I always meant "I need an alias for this" which is actually "read-only reference" which is `const auto &`.
This is also fit good to our policy where "everything is const (immutable) by default".
Hence I change that to how it should be.
Reviewed By: fkgozali
Differential Revision: D8475637
fbshipit-source-id: 0a691ededa0e798db8ffa053bff0f400913ab7b8
Summary:
@public
There are some race conditions between VM objects getting deallocated and the instanceHandle held by the eventEmitter can point to deallocated memory space, causing undefined behavior like a crash.
For now, keep a strong ref to the eventTarget inside EventEmitter to avoid that scenario. This is a temporary workaround.
Reviewed By: shergin
Differential Revision: D8576785
fbshipit-source-id: 87ef36f716270ceca906b32bb86e0046ceaca19e
Summary: Calling the event emitters on the main thread seems to be problematic, so let's dispatch it via the JS thread. This requires some changes to make "eventTarget" single-use because otherwise the binding would need to synchronize the actual JS call with the act of releasing the target.
Reviewed By: shergin
Differential Revision: D8375291
fbshipit-source-id: bd2b42731176ae209f4a19c232309c163fb1c01b
Summary:
Using `EventHandlers` name was a bad idea, and I cannot tolerate it anymore.
The worst part of it is that when you have a collection of `EventHandlers` objects you cannot use plural word to describe it because `EventHandlers` is an already plural word.
And, this object is actually an event emitter, the thing on which we call events.
Reviewed By: fkgozali
Differential Revision: D8247723
fbshipit-source-id: b3303a4b9529bd6d32bb8ca0378287ebefaedda8
Summary:
This is the first attempt to implement some base part of event dispatching pipeline from end-to-end.
Even when it is working, all this is still incomplete and generally up in the air. We are still messing proper implementation of event queue, priority, and synchronization of react reconciliation process with event scheduling.
Reviewed By: fkgozali
Differential Revision: D8212271
fbshipit-source-id: 92f9427d14726441c70ffff294ac95eeb004152a
Summary:
In order to dispatch event, `EventHandlers` must also know react tag. So we have to store it inside.
We plan to illuminate this requirement (and `tag` from `EventHandlers`) eventually.
Reviewed By: fkgozali
Differential Revision: D8211685
fbshipit-source-id: 2064c0f4a7869cbf4d2c92d0349f4ee3998cb8f5
Summary:
Nothing actually changed besides type names... which actually helps me found an issue in FabricUIManager!
Now there is no a single `void *` in Fabric/C++ and JavaScript bindings. Yay!
Reviewed By: fkgozali
Differential Revision: D8191420
fbshipit-source-id: b1eb60b6bc34dd25ab200aab854ffbd7ccf5b15d
Summary:
It's maybe not so important/crucial, but this thing bothers me a lot.
We use raw opaque `EventTarget`, `InstanceHandle` and `EventHandler` pointers in application layer quite a lot and we don't have any kind of type-safety here. I believe all those opaque types should be represented as named scalar types which compiler at least can differentiate at compile time.
So I propose introducing named aliases for them which will point to particular empty `struct`s. This will allow us to tag types properly in all functions and methods and ensure that we pass right values as right arguments.
Again, they are *just aliases*, which are effectively still `void *`, no any additional logic or names are involved.
Unfortunately, those nice type names are already taken by `JSIFabricUIManager` local anonymous namespace (even if they are inside anonymous namespace we cannot use them https://stackoverflow.com/questions/3673353/anonymous-namespace-ambiguity). I think it's fair to rename them because... it's local. And we already use `Wrapper` suffix for them anyways.
Reviewed By: fkgozali
Differential Revision: D8181151
fbshipit-source-id: 9b55b43fb671a56b32a862ac54f78d528e1188ce
Summary: This implements `EventHandlers` abstract class (aka "Events Guy") which encapsulates `eventDispatcher` and `instanceHandle` (and ownership of future `eventTarget`), all of this as part of existing {ShadowNode + Props + LayoutMetrics + LocalData + Descriptor + (and now) EventHandlers} infra. (We don't plan to add anything else to this model. Ever.)
Reviewed By: fkgozali
Differential Revision: D8053351
fbshipit-source-id: 1dd9ccbcbe5a2eb284b59ea351dc8beca645e8bf
Samuel Susla
Valentin Shergin
David Vacca
Andres Suarez
Min ho Kim
empyrical
Sebastian Markbage
Kevin Gozali