194 lines
8.6 KiB
C++
194 lines
8.6 KiB
C++
/*
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* Copyright (C) 2014-2015 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#if ENABLE(ASYNC_SCROLLING)
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#include "ScrollingCoordinator.h"
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#include "ScrollingTree.h"
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#include "Timer.h"
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#include <wtf/RefPtr.h>
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namespace WebCore {
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class Page;
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class Scrollbar;
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class ScrollingStateNode;
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class ScrollingStateScrollingNode;
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class ScrollingStateTree;
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// ScrollingCoordinator subclass that maintains a ScrollingStateTree and a ScrollingTree,
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// allowing asynchronous scrolling (in another thread or process).
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class AsyncScrollingCoordinator : public ScrollingCoordinator {
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public:
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static Ref<AsyncScrollingCoordinator> create(Page*);
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WEBCORE_EXPORT virtual ~AsyncScrollingCoordinator();
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ScrollingTree* scrollingTree() const { return m_scrollingTree.get(); }
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void scrollingStateTreePropertiesChanged();
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void scrollingThreadAddedPendingUpdate();
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void applyPendingScrollUpdates();
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WEBCORE_EXPORT void applyScrollUpdate(ScrollingNodeID, const FloatPoint&, std::optional<FloatPoint> layoutViewportOrigin, ScrollType, ScrollingLayerPositionAction);
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#if PLATFORM(COCOA)
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WEBCORE_EXPORT void handleWheelEventPhase(ScrollingNodeID, PlatformWheelEventPhase) final;
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WEBCORE_EXPORT void setActiveScrollSnapIndices(ScrollingNodeID, std::optional<unsigned> horizontalIndex, std::optional<unsigned> verticalIndex);
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#endif
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WEBCORE_EXPORT void updateScrollSnapPropertiesWithFrameView(const FrameView&) override;
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WEBCORE_EXPORT void updateIsMonitoringWheelEventsForFrameView(const FrameView&) override;
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void reportExposedUnfilledArea(MonotonicTime, unsigned unfilledArea);
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void reportSynchronousScrollingReasonsChanged(MonotonicTime, OptionSet<SynchronousScrollingReason>);
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#if ENABLE(SMOOTH_SCROLLING)
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bool scrollAnimatorEnabled() const;
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#endif
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protected:
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WEBCORE_EXPORT AsyncScrollingCoordinator(Page*);
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void setScrollingTree(Ref<ScrollingTree>&& scrollingTree) { m_scrollingTree = WTFMove(scrollingTree); }
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ScrollingStateTree* scrollingStateTree() { return m_scrollingStateTree.get(); }
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RefPtr<ScrollingTree> releaseScrollingTree() { return WTFMove(m_scrollingTree); }
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WEBCORE_EXPORT String scrollingStateTreeAsText(ScrollingStateTreeAsTextBehavior = ScrollingStateTreeAsTextBehaviorNormal) const override;
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WEBCORE_EXPORT String scrollingTreeAsText(ScrollingStateTreeAsTextBehavior = ScrollingStateTreeAsTextBehaviorNormal) const override;
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WEBCORE_EXPORT void willCommitTree() override;
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void synchronizeStateFromScrollingTree();
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void scheduleRenderingUpdate();
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bool eventTrackingRegionsDirty() const { return m_eventTrackingRegionsDirty; }
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private:
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bool isAsyncScrollingCoordinator() const override { return true; }
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bool hasVisibleSlowRepaintViewportConstrainedObjects(const FrameView&) const override { return false; }
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WEBCORE_EXPORT ScrollingNodeID scrollableContainerNodeID(const RenderObject&) const override;
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WEBCORE_EXPORT void frameViewLayoutUpdated(FrameView&) override;
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WEBCORE_EXPORT void frameViewRootLayerDidChange(FrameView&) override;
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WEBCORE_EXPORT void frameViewVisualViewportChanged(FrameView&) override;
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WEBCORE_EXPORT void frameViewEventTrackingRegionsChanged(FrameView&) override;
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WEBCORE_EXPORT bool requestScrollPositionUpdate(ScrollableArea&, const IntPoint&, ScrollType, ScrollClamping) override;
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WEBCORE_EXPORT void applyScrollingTreeLayerPositions() override;
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WEBCORE_EXPORT ScrollingNodeID createNode(ScrollingNodeType, ScrollingNodeID newNodeID) override;
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WEBCORE_EXPORT ScrollingNodeID insertNode(ScrollingNodeType, ScrollingNodeID newNodeID, ScrollingNodeID parentID, size_t childIndex) override;
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WEBCORE_EXPORT void unparentNode(ScrollingNodeID) override;
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WEBCORE_EXPORT void unparentChildrenAndDestroyNode(ScrollingNodeID) override;
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WEBCORE_EXPORT void detachAndDestroySubtree(ScrollingNodeID) override;
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WEBCORE_EXPORT void clearAllNodes() override;
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WEBCORE_EXPORT ScrollingNodeID parentOfNode(ScrollingNodeID) const override;
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WEBCORE_EXPORT Vector<ScrollingNodeID> childrenOfNode(ScrollingNodeID) const override;
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WEBCORE_EXPORT void setNodeLayers(ScrollingNodeID, const NodeLayers&) override;
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WEBCORE_EXPORT void setScrollingNodeScrollableAreaGeometry(ScrollingNodeID, ScrollableArea&) override;
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WEBCORE_EXPORT void setFrameScrollingNodeState(ScrollingNodeID, const FrameView&) override;
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WEBCORE_EXPORT void setViewportConstraintedNodeConstraints(ScrollingNodeID, const ViewportConstraints&) override;
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WEBCORE_EXPORT void setPositionedNodeConstraints(ScrollingNodeID, const AbsolutePositionConstraints&) override;
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WEBCORE_EXPORT void setRelatedOverflowScrollingNodes(ScrollingNodeID, Vector<ScrollingNodeID>&&) override;
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WEBCORE_EXPORT void reconcileScrollingState(FrameView&, const FloatPoint&, const LayoutViewportOriginOrOverrideRect&, ScrollType, ViewportRectStability, ScrollingLayerPositionAction) override;
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void reconcileScrollPosition(FrameView&, ScrollingLayerPositionAction);
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WEBCORE_EXPORT void scrollBySimulatingWheelEventForTesting(ScrollingNodeID, FloatSize) final;
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WEBCORE_EXPORT bool isUserScrollInProgress(ScrollingNodeID) const override;
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bool isRubberBandInProgress(ScrollingNodeID) const override;
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WEBCORE_EXPORT bool isScrollSnapInProgress(ScrollingNodeID) const override;
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void setScrollPinningBehavior(ScrollPinningBehavior) override;
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WEBCORE_EXPORT void reconcileViewportConstrainedLayerPositions(ScrollingNodeID, const LayoutRect& viewportRect, ScrollingLayerPositionAction) override;
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WEBCORE_EXPORT void scrollableAreaScrollbarLayerDidChange(ScrollableArea&, ScrollbarOrientation) override;
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WEBCORE_EXPORT void setSynchronousScrollingReasons(ScrollingNodeID, OptionSet<SynchronousScrollingReason>) final;
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WEBCORE_EXPORT OptionSet<SynchronousScrollingReason> synchronousScrollingReasons(ScrollingNodeID) const final;
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WEBCORE_EXPORT void windowScreenDidChange(PlatformDisplayID, std::optional<FramesPerSecond> nominalFramesPerSecond) final;
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WEBCORE_EXPORT bool hasSubscrollers() const final;
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virtual void scheduleTreeStateCommit() = 0;
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void ensureRootStateNodeForFrameView(FrameView&);
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void setEventTrackingRegionsDirty();
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void updateEventTrackingRegions();
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void updateScrollPositionAfterAsyncScroll(ScrollingNodeID, const FloatPoint&, std::optional<FloatPoint> layoutViewportOrigin, ScrollType, ScrollingLayerPositionAction);
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FrameView* frameViewForScrollingNode(ScrollingNodeID) const;
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std::unique_ptr<ScrollingStateTree> m_scrollingStateTree;
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RefPtr<ScrollingTree> m_scrollingTree;
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bool m_eventTrackingRegionsDirty { false };
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};
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#if ENABLE(SCROLLING_THREAD)
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class LayerTreeHitTestLocker {
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public:
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LayerTreeHitTestLocker(ScrollingCoordinator* scrollingCoordinator)
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{
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if (is<AsyncScrollingCoordinator>(scrollingCoordinator)) {
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m_scrollingTree = downcast<AsyncScrollingCoordinator>(*scrollingCoordinator).scrollingTree();
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if (m_scrollingTree)
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m_scrollingTree->lockLayersForHitTesting();
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}
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}
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~LayerTreeHitTestLocker()
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{
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if (m_scrollingTree)
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m_scrollingTree->unlockLayersForHitTesting();
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}
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private:
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RefPtr<ScrollingTree> m_scrollingTree;
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};
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#endif
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} // namespace WebCore
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SPECIALIZE_TYPE_TRAITS_SCROLLING_COORDINATOR(WebCore::AsyncScrollingCoordinator, isAsyncScrollingCoordinator());
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#endif // ENABLE(ASYNC_SCROLLING)
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