Summary:
X-link: https://github.com/facebook/react-native/pull/39598
Pull Request resolved: https://github.com/facebook/yoga/pull/1403
Replaces all usages of YGDimension with Dimension.
Adds `yoga::to_underlying` to act like `std::to_underlying`, added in C++ 23.
This enum is oddly only used internally, and is never an input to the public API, but it handled as any other public generated enum. Potentially some more cleanup to do there.
Changelog: [Internal]
Reviewed By: rshest
Differential Revision: D49475409
fbshipit-source-id: 7d4c31e8a84485baea0dab50b5cf16b86769fa07
Summary:
Pull Request resolved: https://github.com/facebook/yoga/pull/1402
X-link: https://github.com/facebook/react-native/pull/39567
This change hides away most usages of YGDimension as an index. We do this for a couple reasons:
1. Right now the style interface may return a full array of resolved edge or dimension values, as a CompactValue. As we abstract away from CompactValue, and move towards ValuePool, this will no longer be the internal interface, and cheap to return. We instead change the interface to return a single value at once, which lets us resolve values lazily.
2. As we move internal usage to scoped enums, enums are not implicitly convertible to intergers (broadly a good thing). Hiding the enum as index prevents the need for callers to cast or convert to underlying.
Instead of making a new version of `IdxRef` for this, I converted to a more traditional setter. I will be making similar changes later for other styles, when I hide CompactValue from the public interface.
To review I would recommend filtering to changes in `xplat`, or viewing this in a single one of the OSS PRs exported. Everything apart from the below 20 files is a mirror.
{F1096792573}
Changelog: [Internal]
Reviewed By: javache
Differential Revision: D49362819
fbshipit-source-id: 30d730d78e62f36597d43f477120f65694e51ea3
Summary:
X-link: https://github.com/facebook/react-native/pull/39485
Pull Request resolved: https://github.com/facebook/yoga/pull/1393
These were previously packed into structs to allow zero initializing all the flags at once without needing a ctor. C++ 20 has in-class member initializer support for bitfields, which makes these look more like normal member variables.
Setting enum values is a bit jank right now, due to relying on C enums which are effectively int32_t, along with GCC `-Wconversion` being a bit aggressive in needing to explicitly mask. I have some ideas to fix this later (e.g. using scoped enums internally).
bypass-github-export-checks
Changelog:
[General][Breaking] - Require C++ 20 when including renderer headers
Reviewed By: sammy-SC
Differential Revision: D49265967
fbshipit-source-id: 6ab935a866196df06e742c821f3af88eb4d18e1a
Summary:
Pull Request resolved: https://github.com/facebook/yoga/pull/1372
X-link: https://github.com/facebook/react-native/pull/39375
D18029030 added `-fvisibility-hidden`, and a corresponding `YOGA_EXPORT` macro for defining shared library visibility. This is used inline next to function and class definitions that should be exported out of the binary.
There was already a `WIN_EXPORT` macro doing the same thing when building a DLL, defined in the headers instead of CPP files, and it seems like sometimes folks forgot to add it to new public APIs after?
This reconciles the redundant macros into a single visibility macro, that we always place with declaration instead of definition. We also rename `YOGA_EXPORT` to `YG_EXPORT` to match the naming convention of other Yoga macros.
Reviewed By: rshest
Differential Revision: D49132643
fbshipit-source-id: cafa6de0c300788a72d9a446ce07c5ac89a20a8e
Summary:
X-link: https://github.com/facebook/react-native/pull/39374
Pull Request resolved: https://github.com/facebook/yoga/pull/1371
Right now `YGConfigGetDefault` and `YGNodeGetConfig` both return mutable, freeable, configs, which is bad, since the former points to a global singleton config, and the latter usually does too. Mutating this is not thread safe, and it should never be freed.
This change makes these functions return `YGConfigConstRef` to prevent mutation, and also lets us allow `YGConfigNewWithConfig` to accept a const config. If a caller does want to mutate a config (such as to free it), it must be tracked manually.
Changelog: [Internal]
Reviewed By: javache
Differential Revision: D49132476
fbshipit-source-id: ac9ce61149e69c6c25cadb99711435b0a5b9f38a
Summary:
Pull Request resolved: https://github.com/facebook/yoga/pull/1366
X-link: https://github.com/facebook/react-native/pull/39371
Yoga's public API exposes indices most often as `uint32_t`, with exception of clone callbacks which are `int32_t`. Yoga internally represents these indices as `size_t` when dealing with the child vector, and this is the true index.
This changes the API to consistently be `size_t`. This should not be breaking for most users, but will cause breaks where:
1. Users set a clone node callback (I think this should be rare. RN uses it, but only because it relies on a separate private API).
2. Callers of `YGNodeGetChildCount()` are assigning to an int with less width than `size_t` and have strong warnings enabled.
3. Using a newer Yoga binary with older source, since we are not preserving ABI compatibility (Yoga in general does not aim to be ABI stable between major versions, only ABI safe for a given set of sources).
Changelog: [Internal]
Reviewed By: sammy-SC
Differential Revision: D49130914
fbshipit-source-id: 6a004c160c4c50f68047b108508fd437156f5fac
Summary:
Pull Request resolved: https://github.com/facebook/yoga/pull/1365
X-link: https://github.com/facebook/react-native/pull/39368
This changes public Yoga API to in more places accept const structures where before they required mutable ones.
`resolveRef` is added as a quick way to resolve overloaded opaque refs for different types which is a bit easier to read than static_casting, and which will propagate const-ness. We also add `YGConfigConstRef`, similar to `YGNodeConstRef`. I was a bit iffy on whether we should add something to make it easier to convert to private interface, but this doesn't seem any easier to misuse than someone who looks at the internals to find the `static_cast`.
This tries to avoid more breaking changes yet, e.g. changing callbacks to require clients do not modify nodes when they are passed for logging. We also don't have const variants for returning child structures which would allow mutation of dependencies of the const object. These would need new names under the public API, since we do not have operator overloading in C.
Reviewed By: rshest
Differential Revision: D49130412
fbshipit-source-id: ee6b31b47f4622031c63dd52d8ac133d21bf29b7
Summary:
X-link: https://github.com/facebook/react-native/pull/39291
Pull Request resolved: https://github.com/facebook/yoga/pull/1359
This enables clang warnings around potentially unsafe conversions, such as those with mismatched signedness, or ones which may lead to truncation.
This should catch issues in local development which create errors for MSVC (e.g. Dash), who's default `/W3` includes warnings akin to `-Wshorten-64-to-32`.
This full set of warnings here is a tad spammy, but probably more useful than not.
Changelog: [Internal]
Reviewed By: yungsters
Differential Revision: D48954777
fbshipit-source-id: 1ccc07b99d09d1c2d428158149698ffd04025605
Summary:
X-link: https://github.com/facebook/react-native/pull/39195
Pull Request resolved: https://github.com/facebook/yoga/pull/1352
## This diff
This splits out all of the logic under `YGNodeCalculateLayout` to a couple of different files, does some mechanical renaming, and starts to split up the implementation a tiny bit. After this, core layout functions are all C++ convention and namespaced.
Each new file is marked as a move for the sake of blame history. It means Phabricator has a very inaccurate count of lines removed though.
## This stack
The organization of the C++ internals of Yoga are in need of attention.
1. Some of the C++ internals are namespaced, but others not.
2. Some of the namespaces include `detail`, but are meant to be used outside of the translation unit (FB Clang Tidy rules warn on any usage of these)
2. Most of the files are in a flat hierarchy, except for event tracing in its own folder
3. Some files and functions begin with YG, others don’t
4. Some functions are uppercase, others are not
5. Almost all of the interesting logic is in Yoga.cpp, and the file is too large to reason about
6. There are multiple grab bag files where folks put random functions they need in (Utils, BitUtils, Yoga-Internal.h)
7. There is no clear indication from file structure or type naming what is private vs not
8. Handles like `YGNodeRef` and `YGConfigRef` can be used to access internals just by importing headers
This stack does some much needed spring cleaning:
1. All non-public headers and C++ implementation details are in separate folders from the root level `yoga`. This will give us room to split up logic and add more files without too large a flat hierarchy
3. All private C++ internals are under the `facebook::yoga` namespace. Details namespaces are only ever used within the same header, as they are intended
4. Utils files are split
5. Most C++ internals drop the YG prefix
6. Most C++ internal function names are all lower camel case
7. We start to split up Yoga.cpp
8. Every header beginning with YG or at the top-level directory is public and C only, with the exception of Yoga-Internal.h which has non-public functions for bindings
9. It is not possible to use private APIs without static casting handles to internal classes
This will give us more leeway to continue splitting monolithic files, and consistent guidelines for style in new files as well.
These changes should not be breaking to any project using only public Yoga headers. This includes every usage of Yoga in fbsource except for RN Fabric which is currently tied to internals. This refactor should make that boundary clearer.
Reviewed By: rshest
Differential Revision: D48770478
fbshipit-source-id: 2a74b86441c3352de03ae193c98fc3a3573047ed
Summary:
X-link: https://github.com/facebook/react-native/pull/39201
Pull Request resolved: https://github.com/facebook/yoga/pull/1353
## This diff
This moves and renames `YGAssert`, and removes it from the public API, since external users should not need to call into internal Yoga assert functions, and the current API prevents us from making this a macro later to include the condition in the message.
## This stack
The organization of the C++ internals of Yoga are in need of attention.
1. Some of the C++ internals are namespaced, but others not.
2. Some of the namespaces include `detail`, but are meant to be used outside of the translation unit (FB Clang Tidy rules warn on any usage of these)
2. Most of the files are in a flat hierarchy, except for event tracing in its own folder
3. Some files and functions begin with YG, others don’t
4. Some functions are uppercase, others are not
5. Almost all of the interesting logic is in Yoga.cpp, and the file is too large to reason about
6. There are multiple grab bag files where folks put random functions they need in (Utils, BitUtils, Yoga-Internal.h)
7. There is no clear indication from file structure or type naming what is private vs not
8. Handles like `YGNodeRef` and `YGConfigRef` can be used to access internals just by importing headers
This stack does some much needed spring cleaning:
1. All non-public headers and C++ implementation details are in separate folders from the root level `yoga`. This will give us room to split up logic and add more files without too large a flat hierarchy
3. All private C++ internals are under the `facebook::yoga` namespace. Details namespaces are only ever used within the same header, as they are intended
4. Utils files are split
5. Most C++ internals drop the YG prefix
6. Most C++ internal function names are all lower camel case
7. We start to split up Yoga.cpp
8. Every header beginning with YG or at the top-level directory is public and C only, with the exception of Yoga-Internal.h which has non-public functions for bindings
9. It is not possible to use private APIs without static casting handles to internal classes
This will give us more leeway to continue splitting monolithic files, and consistent guidelines for style in new files as well.
These changes should not be breaking to any project using only public Yoga headers. This includes every usage of Yoga in fbsource except for RN Fabric which is currently tied to internals. This refactor should make that boundary clearer.
Reviewed By: rshest
Differential Revision: D48769809
fbshipit-source-id: b5480ac54781bc01b00c158b07d2d751fac87d37
Summary:
Pull Request resolved: https://github.com/facebook/yoga/pull/1355
X-link: https://github.com/facebook/react-native/pull/39198
## This diff
This splits up `Yoga-internal.h` which has become a grab bag. The actual header is left, with the purpose of being a private C ABI for bindings, but everything else is moved to a place more appropriate or removed.
A few notes:
1. `yoga::isUndefined` is replaced with `std::isnan` to avoid a layer of indirection (we will never be able to change its representation anyway). Internal usages of `YGFloatIsUndefined` are also replaced with `std::isnan` since the previous being at a library boundary means I'm not sure it can be inlined/.
2. `leading`, `trailing` arrays are factored into proper functions
3. `Values` is replaced entirely with `std::array`, since most of it was unused.
## This stack
The organization of the C++ internals of Yoga are in need of attention.
1. Some of the C++ internals are namespaced, but others not.
2. Some of the namespaces include `detail`, but are meant to be used outside of the translation unit (FB Clang Tidy rules warn on any usage of these)
2. Most of the files are in a flat hierarchy, except for event tracing in its own folder
3. Some files and functions begin with YG, others don’t
4. Some functions are uppercase, others are not
5. Almost all of the interesting logic is in Yoga.cpp, and the file is too large to reason about
6. There are multiple grab bag files where folks put random functions they need in (Utils, BitUtils, Yoga-Internal.h)
7. There is no clear indication from file structure or type naming what is private vs not
8. Handles like `YGNodeRef` and `YGConfigRef` can be used to access internals just by importing headers
This stack does some much needed spring cleaning:
1. All non-public headers and C++ implementation details are in separate folders from the root level `yoga`. This will give us room to split up logic and add more files without too large a flat hierarchy
3. All private C++ internals are under the `facebook::yoga` namespace. Details namespaces are only ever used within the same header, as they are intended
4. Utils files are split
5. Most C++ internals drop the YG prefix
6. Most C++ internal function names are all lower camel case
7. We start to split up Yoga.cpp
8. Every header beginning with YG or at the top-level directory is public and C only, with the exception of Yoga-Internal.h which has non-public functions for bindings
9. It is not possible to use private APIs without static casting handles to internal classes
This will give us more leeway to continue splitting monolithic files, and consistent guidelines for style in new files as well.
These changes should not be breaking to any project using only public Yoga headers. This includes every usage of Yoga in fbsource except for RN Fabric which is currently tied to internals. This refactor should make that boundary clearer.
Reviewed By: rshest
Differential Revision: D48769241
fbshipit-source-id: 5b8e2192309539e7c133c3b3b29b445b59dd5835
Summary:
X-link: https://github.com/facebook/react-native/pull/39224
Pull Request resolved: https://github.com/facebook/yoga/pull/1356
X-link: https://github.com/facebook/react-native/pull/39196
## This diff
This renames YGFloatOptional to FloatOptional, adds it to a namespace, and moves it to a subdirectory. This needs Fabric updates because Fabric uses Yoga internals for props storage.
## This stack
The organization of the C++ internals of Yoga are in need of attention.
1. Some of the C++ internals are namespaced, but others not.
2. Some of the namespaces include `detail`, but are meant to be used outside of the translation unit (FB Clang Tidy rules warn on any usage of these)
2. Most of the files are in a flat hierarchy, except for event tracing in its own folder
3. Some files and functions begin with YG, others don’t
4. Some functions are uppercase, others are not
5. Almost all of the interesting logic is in Yoga.cpp, and the file is too large to reason about
6. There are multiple grab bag files where folks put random functions they need in (Utils, BitUtils, Yoga-Internal.h)
7. There is no clear indication from file structure or type naming what is private vs not
8. Handles like `YGNodeRef` and `YGConfigRef` can be used to access internals just by importing headers
This stack does some much needed spring cleaning:
1. All non-public headers and C++ implementation details are in separate folders from the root level `yoga`. This will give us room to split up logic and add more files without too large a flat hierarchy
3. All private C++ internals are under the `facebook::yoga` namespace. Details namespaces are only ever used within the same header, as they are intended
4. Utils files are split
5. Most C++ internals drop the YG prefix
6. Most C++ internal function names are all lower camel case
7. We start to split up Yoga.cpp
8. Every header beginning with YG or at the top-level directory is public and C only, with the exception of Yoga-Internal.h which has non-public functions for bindings
9. It is not possible to use private APIs without static casting handles to internal classes
This will give us more leeway to continue splitting monolithic files, and consistent guidelines for style in new files as well.
These changes should not be breaking to any project using only public Yoga headers. This includes every usage of Yoga in fbsource except for RN Fabric which is currently tied to internals. This refactor should make that boundary clearer.
Changelog: [Internal]
bypass-github-export-checks
Reviewed By: shwanton
Differential Revision: D48847256
fbshipit-source-id: ab9729a4a02ab90d974183425935f4d274db5732
Summary:
X-link: https://github.com/facebook/react-native/pull/39222
Pull Request resolved: https://github.com/facebook/yoga/pull/1357
X-link: https://github.com/facebook/react-native/pull/39199
## This diff
This splits `Utils.h` and `Utils.cpp`, and tweaks naming and namespaces.
## This stack
The organization of the C++ internals of Yoga are in need of attention.
1. Some of the C++ internals are namespaced, but others not.
2. Some of the namespaces include `detail`, but are meant to be used outside of the translation unit (FB Clang Tidy rules warn on any usage of these)
2. Most of the files are in a flat hierarchy, except for event tracing in its own folder
3. Some files and functions begin with YG, others don’t
4. Some functions are uppercase, others are not
5. Almost all of the interesting logic is in Yoga.cpp, and the file is too large to reason about
6. There are multiple grab bag files where folks put random functions they need in (Utils, BitUtils, Yoga-Internal.h)
7. There is no clear indication from file structure or type naming what is private vs not
8. Handles like `YGNodeRef` and `YGConfigRef` can be used to access internals just by importing headers
This stack does some much needed spring cleaning:
1. All non-public headers and C++ implementation details are in separate folders from the root level `yoga`. This will give us room to split up logic and add more files without too large a flat hierarchy
3. All private C++ internals are under the `facebook::yoga` namespace. Details namespaces are only ever used within the same header, as they are intended
4. Utils files are split
5. Most C++ internals drop the YG prefix
6. Most C++ internal function names are all lower camel case
7. We start to split up Yoga.cpp
8. Every header beginning with YG or at the top-level directory is public and C only, with the exception of Yoga-Internal.h which has non-public functions for bindings
9. It is not possible to use private APIs without static casting handles to internal classes
This will give us more leeway to continue splitting monolithic files, and consistent guidelines for style in new files as well.
These changes should not be breaking to any project using only public Yoga headers. This includes every usage of Yoga in fbsource except for RN Fabric which is currently tied to internals. This refactor should make that boundary clearer.
bypass-github-export-checks
Reviewed By: shwanton
Differential Revision: D48847260
fbshipit-source-id: b99df3029cd66257a7ae64de28c13e8751ceb20c
Summary:
X-link: https://github.com/facebook/react-native/pull/39219
Pull Request resolved: https://github.com/facebook/yoga/pull/1350
X-link: https://github.com/facebook/react-native/pull/39170
## This diff
This diff adds a top level `node` directory for code related to Yoga nodes and data structures on them (inc moving `YGLayout` to `LayoutResults`).
The public API for config handles is `YGNodeRef`, which is forward declared to be a pointer to a struct named `YGNode`. The existing `YGNode` is split into `yoga::Node`, as the private C++ implementation, inheriting from `YGNode`, a marker type represented as an empty struct. The public API continues to accept `YGNodeRef`, which continues to be `YGNode *`, but it must be cast to its concrete internal representation at the API boundary before doing work on it.
This change ends up needing to touch quite a bit, due to the amount of code that mixed and matched private and public APIs. Don't be scared though, because these changes are very mechanical, and Phabricator's line-count is 3x the actual amount due to mirrors and dirsyncs.
## This stack
The organization of the C++ internals of Yoga are in need of attention.
1. Some of the C++ internals are namespaced, but others not.
2. Some of the namespaces include `detail`, but are meant to be used outside of the translation unit (FB Clang Tidy rules warn on any usage of these)
2. Most of the files are in a flat hierarchy, except for event tracing in its own folder
3. Some files and functions begin with YG, others don’t
4. Some functions are uppercase, others are not
5. Almost all of the interesting logic is in Yoga.cpp, and the file is too large to reason about
6. There are multiple grab bag files where folks put random functions they need in (Utils, BitUtils, Yoga-Internal.h)
7. There is no clear indication from file structure or type naming what is private vs not
8. Handles like `YGNodeRef` and `YGConfigRef` can be used to access internals just by importing headers
This stack does some much needed spring cleaning:
1. All non-public headers and C++ implementation details are in separate folders from the root level `yoga`. This will give us room to split up logic and add more files without too large a flat hierarchy
3. All private C++ internals are under the `facebook::yoga` namespace. Details namespaces are only ever used within the same header, as they are intended
4. Utils files are split
5. Most C++ internals drop the YG prefix
6. Most C++ internal function names are all lower camel case
7. We start to split up Yoga.cpp
8. Every header beginning with YG or at the top-level directory is public and C only, with the exception of Yoga-Internal.h which has non-public functions for bindings
9. It is not possible to use private APIs without static casting handles to internal classes
This will give us more leeway to continue splitting monolithic files, and consistent guidelines for style in new files as well.
These changes should not be breaking to any project using only public Yoga headers. This includes every usage of Yoga in fbsource except for RN Fabric which is currently tied to internals. This refactor should make that boundary clearer.
Changelog: [Internal]
bypass-github-export-checks
Reviewed By: shwanton
Differential Revision: D48847258
fbshipit-source-id: fc560893533b55a5c2d52c37d8e9a59f7369f174
Summary:
Pull Request resolved: https://github.com/facebook/yoga/pull/1356
X-link: https://github.com/facebook/react-native/pull/39196
## This diff
This renames YGFloatOptional to FloatOptional, adds it to a namespace, and moves it to a subdirectory. This needs Fabric updates because Fabric uses Yoga internals for props storage.
## This stack
The organization of the C++ internals of Yoga are in need of attention.
1. Some of the C++ internals are namespaced, but others not.
2. Some of the namespaces include `detail`, but are meant to be used outside of the translation unit (FB Clang Tidy rules warn on any usage of these)
2. Most of the files are in a flat hierarchy, except for event tracing in its own folder
3. Some files and functions begin with YG, others don’t
4. Some functions are uppercase, others are not
5. Almost all of the interesting logic is in Yoga.cpp, and the file is too large to reason about
6. There are multiple grab bag files where folks put random functions they need in (Utils, BitUtils, Yoga-Internal.h)
7. There is no clear indication from file structure or type naming what is private vs not
8. Handles like `YGNodeRef` and `YGConfigRef` can be used to access internals just by importing headers
This stack does some much needed spring cleaning:
1. All non-public headers and C++ implementation details are in separate folders from the root level `yoga`. This will give us room to split up logic and add more files without too large a flat hierarchy
3. All private C++ internals are under the `facebook::yoga` namespace. Details namespaces are only ever used within the same header, as they are intended
4. Utils files are split
5. Most C++ internals drop the YG prefix
6. Most C++ internal function names are all lower camel case
7. We start to split up Yoga.cpp
8. Every header beginning with YG or at the top-level directory is public and C only, with the exception of Yoga-Internal.h which has non-public functions for bindings
9. It is not possible to use private APIs without static casting handles to internal classes
This will give us more leeway to continue splitting monolithic files, and consistent guidelines for style in new files as well.
These changes should not be breaking to any project using only public Yoga headers. This includes every usage of Yoga in fbsource except for RN Fabric which is currently tied to internals. This refactor should make that boundary clearer.
Changelog: [Internal]
Reviewed By: rshest
Differential Revision: D48767992
fbshipit-source-id: afaff023435915dbd5e571fd1ee2e695e4f59a5c
Summary:
Pull Request resolved: https://github.com/facebook/yoga/pull/1357
X-link: https://github.com/facebook/react-native/pull/39199
## This diff
This splits `Utils.h` and `Utils.cpp`, and tweaks naming and namespaces.
## This stack
The organization of the C++ internals of Yoga are in need of attention.
1. Some of the C++ internals are namespaced, but others not.
2. Some of the namespaces include `detail`, but are meant to be used outside of the translation unit (FB Clang Tidy rules warn on any usage of these)
2. Most of the files are in a flat hierarchy, except for event tracing in its own folder
3. Some files and functions begin with YG, others don’t
4. Some functions are uppercase, others are not
5. Almost all of the interesting logic is in Yoga.cpp, and the file is too large to reason about
6. There are multiple grab bag files where folks put random functions they need in (Utils, BitUtils, Yoga-Internal.h)
7. There is no clear indication from file structure or type naming what is private vs not
8. Handles like `YGNodeRef` and `YGConfigRef` can be used to access internals just by importing headers
This stack does some much needed spring cleaning:
1. All non-public headers and C++ implementation details are in separate folders from the root level `yoga`. This will give us room to split up logic and add more files without too large a flat hierarchy
3. All private C++ internals are under the `facebook::yoga` namespace. Details namespaces are only ever used within the same header, as they are intended
4. Utils files are split
5. Most C++ internals drop the YG prefix
6. Most C++ internal function names are all lower camel case
7. We start to split up Yoga.cpp
8. Every header beginning with YG or at the top-level directory is public and C only, with the exception of Yoga-Internal.h which has non-public functions for bindings
9. It is not possible to use private APIs without static casting handles to internal classes
This will give us more leeway to continue splitting monolithic files, and consistent guidelines for style in new files as well.
These changes should not be breaking to any project using only public Yoga headers. This includes every usage of Yoga in fbsource except for RN Fabric which is currently tied to internals. This refactor should make that boundary clearer.
Reviewed By: rshest
Differential Revision: D48767465
fbshipit-source-id: da71579532924b3a912454163fe281c481770a77
Summary:
Pull Request resolved: https://github.com/facebook/yoga/pull/1350
X-link: https://github.com/facebook/react-native/pull/39170
## This diff
This diff adds a top level `node` directory for code related to Yoga nodes and data structures on them (inc moving `YGLayout` to `LayoutResults`).
The public API for config handles is `YGNodeRef`, which is forward declared to be a pointer to a struct named `YGNode`. The existing `YGNode` is split into `yoga::Node`, as the private C++ implementation, inheriting from `YGNode`, a marker type represented as an empty struct. The public API continues to accept `YGNodeRef`, which continues to be `YGNode *`, but it must be cast to its concrete internal representation at the API boundary before doing work on it.
This change ends up needing to touch quite a bit, due to the amount of code that mixed and matched private and public APIs. Don't be scared though, because these changes are very mechanical, and Phabricator's line-count is 3x the actual amount due to mirrors and dirsyncs.
## This stack
The organization of the C++ internals of Yoga are in need of attention.
1. Some of the C++ internals are namespaced, but others not.
2. Some of the namespaces include `detail`, but are meant to be used outside of the translation unit (FB Clang Tidy rules warn on any usage of these)
2. Most of the files are in a flat hierarchy, except for event tracing in its own folder
3. Some files and functions begin with YG, others don’t
4. Some functions are uppercase, others are not
5. Almost all of the interesting logic is in Yoga.cpp, and the file is too large to reason about
6. There are multiple grab bag files where folks put random functions they need in (Utils, BitUtils, Yoga-Internal.h)
7. There is no clear indication from file structure or type naming what is private vs not
8. Handles like `YGNodeRef` and `YGConfigRef` can be used to access internals just by importing headers
This stack does some much needed spring cleaning:
1. All non-public headers and C++ implementation details are in separate folders from the root level `yoga`. This will give us room to split up logic and add more files without too large a flat hierarchy
3. All private C++ internals are under the `facebook::yoga` namespace. Details namespaces are only ever used within the same header, as they are intended
4. Utils files are split
5. Most C++ internals drop the YG prefix
6. Most C++ internal function names are all lower camel case
7. We start to split up Yoga.cpp
8. Every header beginning with YG or at the top-level directory is public and C only, with the exception of Yoga-Internal.h which has non-public functions for bindings
9. It is not possible to use private APIs without static casting handles to internal classes
This will give us more leeway to continue splitting monolithic files, and consistent guidelines for style in new files as well.
These changes should not be breaking to any project using only public Yoga headers. This includes every usage of Yoga in fbsource except for RN Fabric which is currently tied to internals. This refactor should make that boundary clearer.
Changelog: [Internal]
Reviewed By: rshest
Differential Revision: D48712710
fbshipit-source-id: d28eae38469afa24a8cb03e4e75eeb8e431173c5
