| /* |
| * Copyright (C) 2018 Igalia S.L. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "ScrollingCoordinatorNicosia.h" |
| |
| #if ENABLE(ASYNC_SCROLLING) && USE(NICOSIA) |
| |
| #include "ScrollingThread.h" |
| #include "ScrollingTreeNicosia.h" |
| |
| namespace WebCore { |
| |
| Ref<ScrollingCoordinator> ScrollingCoordinator::create(Page* page) |
| { |
| return adoptRef(*new ScrollingCoordinatorNicosia(page)); |
| } |
| |
| ScrollingCoordinatorNicosia::ScrollingCoordinatorNicosia(Page* page) |
| : AsyncScrollingCoordinator(page) |
| , m_scrollingStateTreeCommitterTimer(RunLoop::main(), this, &ScrollingCoordinatorNicosia::commitTreeState) |
| { |
| setScrollingTree(ScrollingTreeNicosia::create(*this)); |
| } |
| |
| ScrollingCoordinatorNicosia::~ScrollingCoordinatorNicosia() |
| { |
| ASSERT(!scrollingTree()); |
| } |
| |
| void ScrollingCoordinatorNicosia::pageDestroyed() |
| { |
| AsyncScrollingCoordinator::pageDestroyed(); |
| |
| m_scrollingStateTreeCommitterTimer.stop(); |
| |
| // Invalidating the scrolling tree will break the reference cycle between the ScrollingCoordinator and ScrollingTree objects. |
| RefPtr<ThreadedScrollingTree> scrollingTree = static_pointer_cast<ThreadedScrollingTree>(releaseScrollingTree()); |
| ScrollingThread::dispatch([scrollingTree] { scrollingTree->invalidate(); }); |
| } |
| |
| void ScrollingCoordinatorNicosia::commitTreeStateIfNeeded() |
| { |
| commitTreeState(); |
| m_scrollingStateTreeCommitterTimer.stop(); |
| } |
| |
| ScrollingEventResult ScrollingCoordinatorNicosia::handleWheelEvent(FrameView&, const PlatformWheelEvent& wheelEvent) |
| { |
| ASSERT(isMainThread()); |
| ASSERT(m_page); |
| ASSERT(scrollingTree()); |
| |
| ScrollingThread::dispatch([threadedScrollingTree = makeRef(downcast<ThreadedScrollingTree>(*scrollingTree())), wheelEvent] { |
| threadedScrollingTree->handleWheelEvent(wheelEvent); |
| }); |
| return ScrollingEventResult::DidHandleEvent; |
| } |
| |
| void ScrollingCoordinatorNicosia::scheduleTreeStateCommit() |
| { |
| if (!m_scrollingStateTreeCommitterTimer.isActive()) |
| m_scrollingStateTreeCommitterTimer.startOneShot(0_s); |
| } |
| |
| void ScrollingCoordinatorNicosia::commitTreeState() |
| { |
| willCommitTree(); |
| |
| if (!scrollingStateTree()->hasChangedProperties()) |
| return; |
| |
| RefPtr<ThreadedScrollingTree> threadedScrollingTree = downcast<ThreadedScrollingTree>(scrollingTree()); |
| threadedScrollingTree->incrementPendingCommitCount(); |
| |
| auto treeState = scrollingStateTree()->commit(LayerRepresentation::PlatformLayerRepresentation); |
| ScrollingThread::dispatch([threadedScrollingTree, treeState = WTFMove(treeState)]() mutable { |
| threadedScrollingTree->commitTreeState(WTFMove(treeState)); |
| }); |
| } |
| |
| } // namespace WebCore |
| |
| #endif // ENABLE(ASYNC_SCROLLING) && USE(NICOSIA) |