| /* |
| * Copyright (C) 2011 Apple Inc. All rights reserved. |
| * |
| * 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 APPLE INC. AND ITS 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 APPLE INC. OR ITS 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" |
| |
| #if ENABLE(ASYNC_SCROLLING) && PLATFORM(MAC) |
| |
| #import "ScrollingCoordinatorMac.h" |
| |
| #include "Frame.h" |
| #include "FrameView.h" |
| #include "Logging.h" |
| #include "Page.h" |
| #include "PlatformWheelEvent.h" |
| #include "Region.h" |
| #include "ScrollingStateTree.h" |
| #include "ScrollingThread.h" |
| #include "ScrollingTreeFixedNode.h" |
| #include "ScrollingTreeFrameScrollingNodeMac.h" |
| #include "ScrollingTreeMac.h" |
| #include "ScrollingTreeStickyNode.h" |
| #include "TiledBacking.h" |
| #include <wtf/MainThread.h> |
| |
| namespace WebCore { |
| |
| Ref<ScrollingCoordinator> ScrollingCoordinator::create(Page* page) |
| { |
| return adoptRef(*new ScrollingCoordinatorMac(page)); |
| } |
| |
| ScrollingCoordinatorMac::ScrollingCoordinatorMac(Page* page) |
| : AsyncScrollingCoordinator(page) |
| , m_scrollingStateTreeCommitterTimer(*this, &ScrollingCoordinatorMac::commitTreeState) |
| { |
| setScrollingTree(ScrollingTreeMac::create(*this)); |
| } |
| |
| ScrollingCoordinatorMac::~ScrollingCoordinatorMac() |
| { |
| ASSERT(!scrollingTree()); |
| } |
| |
| void ScrollingCoordinatorMac::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 ScrollingCoordinatorMac::commitTreeStateIfNeeded() |
| { |
| commitTreeState(); |
| m_scrollingStateTreeCommitterTimer.stop(); |
| } |
| |
| ScrollingEventResult ScrollingCoordinatorMac::handleWheelEvent(FrameView&, const PlatformWheelEvent& wheelEvent) |
| { |
| ASSERT(isMainThread()); |
| ASSERT(m_page); |
| |
| if (scrollingTree()->willWheelEventStartSwipeGesture(wheelEvent)) |
| return ScrollingEventResult::DidNotHandleEvent; |
| |
| RefPtr<ThreadedScrollingTree> threadedScrollingTree = downcast<ThreadedScrollingTree>(scrollingTree()); |
| ScrollingThread::dispatch([threadedScrollingTree, wheelEvent] { |
| threadedScrollingTree->handleWheelEvent(wheelEvent); |
| }); |
| return ScrollingEventResult::DidHandleEvent; |
| } |
| |
| void ScrollingCoordinatorMac::scheduleTreeStateCommit() |
| { |
| ASSERT(scrollingStateTree()->hasChangedProperties() || eventTrackingRegionsDirty()); |
| |
| if (m_scrollingStateTreeCommitterTimer.isActive()) |
| return; |
| |
| LOG(Scrolling, "ScrollingCoordinatorMac::scheduleTreeStateCommit"); |
| m_scrollingStateTreeCommitterTimer.startOneShot(0_s); |
| } |
| |
| void ScrollingCoordinatorMac::commitTreeState() |
| { |
| willCommitTree(); |
| |
| LOG(Scrolling, "ScrollingCoordinatorMac::commitTreeState, has changes %d", scrollingStateTree()->hasChangedProperties()); |
| |
| if (!scrollingStateTree()->hasChangedProperties()) |
| return; |
| |
| LOG(Scrolling, "%s", scrollingStateTreeAsText(ScrollingStateTreeAsTextBehaviorDebug).utf8().data()); |
| |
| RefPtr<ThreadedScrollingTree> threadedScrollingTree = downcast<ThreadedScrollingTree>(scrollingTree()); |
| ScrollingStateTree* unprotectedTreeState = scrollingStateTree()->commit(LayerRepresentation::PlatformLayerRepresentation).release(); |
| |
| threadedScrollingTree->incrementPendingCommitCount(); |
| |
| ScrollingThread::dispatch([threadedScrollingTree, unprotectedTreeState] { |
| std::unique_ptr<ScrollingStateTree> treeState(unprotectedTreeState); |
| threadedScrollingTree->commitTreeState(WTFMove(treeState)); |
| }); |
| |
| updateTiledScrollingIndicator(); |
| } |
| |
| void ScrollingCoordinatorMac::updateTiledScrollingIndicator() |
| { |
| FrameView* frameView = m_page->mainFrame().view(); |
| if (!frameView) |
| return; |
| |
| TiledBacking* tiledBacking = frameView->tiledBacking(); |
| if (!tiledBacking) |
| return; |
| |
| ScrollingModeIndication indicatorMode; |
| if (shouldUpdateScrollLayerPositionSynchronously(*frameView)) |
| indicatorMode = SynchronousScrollingBecauseOfStyleIndication; |
| else |
| indicatorMode = AsyncScrollingIndication; |
| |
| tiledBacking->setScrollingModeIndication(indicatorMode); |
| } |
| |
| } // namespace WebCore |
| |
| #endif // ENABLE(ASYNC_SCROLLING) && PLATFORM(MAC) |