forked from mirrors/gecko-dev
ce897c182a
This patch splits out AnimationFrameProvider from the Document WebIDL to allow the workers to implement it. It also splits out a helper class to manage the requestAnimationFrame callbacks which may be reused on a worker thread. Differential Revision: https://phabricator.services.mozilla.com/D130262
78 lines
2.2 KiB
C++
78 lines
2.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_AnimationFrameProvider_h
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#define mozilla_dom_AnimationFrameProvider_h
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#include "mozilla/dom/AnimationFrameProviderBinding.h"
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#include "mozilla/HashTable.h"
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#include "mozilla/RefPtr.h"
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#include "nsTArray.h"
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namespace mozilla::dom {
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struct FrameRequest {
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FrameRequest(FrameRequestCallback& aCallback, int32_t aHandle);
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~FrameRequest();
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// Comparator operators to allow RemoveElementSorted with an
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// integer argument on arrays of FrameRequest
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bool operator==(int32_t aHandle) const { return mHandle == aHandle; }
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bool operator<(int32_t aHandle) const { return mHandle < aHandle; }
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RefPtr<FrameRequestCallback> mCallback;
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int32_t mHandle;
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};
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class FrameRequestManager {
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public:
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FrameRequestManager() = default;
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~FrameRequestManager() = default;
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nsresult Schedule(FrameRequestCallback& aCallback, int32_t* aHandle);
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bool Cancel(int32_t aHandle);
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bool IsEmpty() const { return mCallbacks.IsEmpty(); }
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bool IsCanceled(int32_t aHandle) const {
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return !mCanceledCallbacks.empty() && mCanceledCallbacks.has(aHandle);
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}
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void Take(nsTArray<FrameRequest>& aCallbacks) {
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aCallbacks = std::move(mCallbacks);
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mCanceledCallbacks.clear();
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}
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void Unlink();
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void Traverse(nsCycleCollectionTraversalCallback& aCB);
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private:
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nsTArray<FrameRequest> mCallbacks;
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// The set of frame request callbacks that were canceled but which we failed
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// to find in mFrameRequestCallbacks.
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HashSet<int32_t> mCanceledCallbacks;
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/**
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* The current frame request callback handle
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*/
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int32_t mCallbackCounter = 0;
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};
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inline void ImplCycleCollectionUnlink(FrameRequestManager& aField) {
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aField.Unlink();
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}
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inline void ImplCycleCollectionTraverse(
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nsCycleCollectionTraversalCallback& aCallback, FrameRequestManager& aField,
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const char* aName, uint32_t aFlags) {
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aField.Traverse(aCallback);
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}
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} // namespace mozilla::dom
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#endif
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