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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /layout/style/PostTraversalTask.h | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'layout/style/PostTraversalTask.h')
-rw-r--r-- | layout/style/PostTraversalTask.h | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/layout/style/PostTraversalTask.h b/layout/style/PostTraversalTask.h new file mode 100644 index 0000000000..64d67b0227 --- /dev/null +++ b/layout/style/PostTraversalTask.h @@ -0,0 +1,128 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef mozilla_PostTraversalTask_h +#define mozilla_PostTraversalTask_h + +#include "nscore.h" + +/* a task to be performed immediately after a Servo traversal */ + +namespace mozilla { +class ServoStyleSet; +namespace dom { +class FontFace; +class FontFaceSet; +class FontFaceSetImpl; +} // namespace dom +namespace fontlist { +struct Family; +} // namespace fontlist +} // namespace mozilla +class gfxUserFontEntry; + +namespace mozilla { + +/** + * A PostTraversalTask is a task to be performed immediately after a Servo + * traversal. There are just a few tasks we need to perform, so we use this + * class rather than Runnables, to avoid virtual calls and some allocations. + * + * A PostTraversalTask is only safe to run immediately after the Servo + * traversal, since it can hold raw pointers to DOM objects. + */ +class PostTraversalTask { + public: + static PostTraversalTask ResolveFontFaceLoadedPromise( + dom::FontFace* aFontFace) { + auto task = PostTraversalTask(Type::ResolveFontFaceLoadedPromise); + task.mTarget = aFontFace; + return task; + } + + static PostTraversalTask RejectFontFaceLoadedPromise(dom::FontFace* aFontFace, + nsresult aResult) { + auto task = PostTraversalTask(Type::ResolveFontFaceLoadedPromise); + task.mTarget = aFontFace; + task.mResult = aResult; + return task; + } + + static PostTraversalTask DispatchLoadingEventAndReplaceReadyPromise( + dom::FontFaceSet* aFontFaceSet) { + auto task = + PostTraversalTask(Type::DispatchLoadingEventAndReplaceReadyPromise); + task.mTarget = aFontFaceSet; + return task; + } + + static PostTraversalTask DispatchFontFaceSetCheckLoadingFinishedAfterDelay( + dom::FontFaceSetImpl* aFontFaceSet) { + auto task = PostTraversalTask( + Type::DispatchFontFaceSetCheckLoadingFinishedAfterDelay); + task.mTarget = aFontFaceSet; + return task; + } + + static PostTraversalTask LoadFontEntry(gfxUserFontEntry* aFontEntry) { + auto task = PostTraversalTask(Type::LoadFontEntry); + task.mTarget = aFontEntry; + return task; + } + + static PostTraversalTask InitializeFamily(fontlist::Family* aFamily) { + auto task = PostTraversalTask(Type::InitializeFamily); + task.mTarget = aFamily; + return task; + } + + static PostTraversalTask FontInfoUpdate(ServoStyleSet* aSet) { + auto task = PostTraversalTask(Type::FontInfoUpdate); + task.mTarget = aSet; + return task; + } + + void Run(); + + private: + // For any new raw pointer type that we need to store in a PostTraversalTask, + // please add an assertion that class' destructor that we are not in a Servo + // traversal, to protect against the possibility of having dangling pointers. + enum class Type { + // mTarget (FontFace*) + ResolveFontFaceLoadedPromise, + + // mTarget (FontFace*) + // mResult + RejectFontFaceLoadedPromise, + + // mTarget (FontFaceSet*) + DispatchLoadingEventAndReplaceReadyPromise, + + // mTarget (FontFaceSetImpl*) + DispatchFontFaceSetCheckLoadingFinishedAfterDelay, + + // mTarget (gfxUserFontEntry*) + LoadFontEntry, + + // mTarget (fontlist::Family*) + InitializeFamily, + + // mTarget (ServoStyleSet*) + FontInfoUpdate, + }; + + explicit PostTraversalTask(Type aType) + : mType(aType), mTarget(nullptr), mResult(NS_OK) {} + + Type mType; + void* mTarget; + nsresult mResult; +}; + +} // namespace mozilla + +#endif // mozilla_PostTraversalTask_h |