diff options
Diffstat (limited to 'dom/base/AnimationFrameProvider.cpp')
-rw-r--r-- | dom/base/AnimationFrameProvider.cpp | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/dom/base/AnimationFrameProvider.cpp b/dom/base/AnimationFrameProvider.cpp new file mode 100644 index 0000000000..ba2ee8849b --- /dev/null +++ b/dom/base/AnimationFrameProvider.cpp @@ -0,0 +1,53 @@ +/* -*- 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/. */ + +#include "mozilla/dom/AnimationFrameProvider.h" +#include "nsThreadUtils.h" + +namespace mozilla::dom { + +FrameRequest::FrameRequest(FrameRequestCallback& aCallback, int32_t aHandle) + : mCallback(&aCallback), mHandle(aHandle) { + LogFrameRequestCallback::LogDispatch(mCallback); +} + +FrameRequest::~FrameRequest() = default; + +nsresult FrameRequestManager::Schedule(FrameRequestCallback& aCallback, + int32_t* aHandle) { + if (mCallbackCounter == INT32_MAX) { + // Can't increment without overflowing; bail out + return NS_ERROR_NOT_AVAILABLE; + } + int32_t newHandle = ++mCallbackCounter; + + mCallbacks.AppendElement(FrameRequest(aCallback, newHandle)); + + *aHandle = newHandle; + return NS_OK; +} + +bool FrameRequestManager::Cancel(int32_t aHandle) { + // mCallbacks is stored sorted by handle + if (mCallbacks.RemoveElementSorted(aHandle)) { + return true; + } + + Unused << mCanceledCallbacks.put(aHandle); + return false; +} + +void FrameRequestManager::Unlink() { mCallbacks.Clear(); } + +void FrameRequestManager::Traverse(nsCycleCollectionTraversalCallback& aCB) { + for (auto& i : mCallbacks) { + NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(aCB, + "FrameRequestManager::mCallbacks[i]"); + aCB.NoteXPCOMChild(i.mCallback); + } +} + +} // namespace mozilla::dom |