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/*
* Copyright (C) 2014 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.
*/
#pragma once
#if ENABLE(UI_SIDE_COMPOSITING)
#include <WebCore/ScrollingConstraints.h>
#include <WebCore/ScrollingCoordinatorTypes.h>
#include <WebCore/ScrollingTree.h>
#include <WebCore/WheelEventTestMonitor.h>
#include <wtf/TZoneMalloc.h>
#include <wtf/WeakPtr.h>
namespace WebCore {
class PlatformMouseEvent;
};
namespace WebKit {
class RemoteScrollingCoordinatorProxy;
class RemoteScrollingTree : public WebCore::ScrollingTree {
WTF_MAKE_TZONE_ALLOCATED(RemoteScrollingTree);
public:
static Ref<RemoteScrollingTree> create(RemoteScrollingCoordinatorProxy&);
virtual ~RemoteScrollingTree();
bool isRemoteScrollingTree() const final { return true; }
void invalidate() final;
virtual void willSendEventForDefaultHandling(const WebCore::PlatformWheelEvent&) { }
virtual void waitForEventDefaultHandlingCompletion(const WebCore::PlatformWheelEvent&) { }
virtual void receivedEventAfterDefaultHandling(const WebCore::PlatformWheelEvent&, std::optional<WebCore::WheelScrollGestureState>) { };
virtual WebCore::WheelEventHandlingResult handleWheelEventAfterDefaultHandling(const WebCore::PlatformWheelEvent&, std::optional<WebCore::ScrollingNodeID>, std::optional<WebCore::WheelScrollGestureState>) { return WebCore::WheelEventHandlingResult::unhandled(); }
RemoteScrollingCoordinatorProxy* scrollingCoordinatorProxy() const;
void scrollingTreeNodeDidScroll(WebCore::ScrollingTreeScrollingNode&, WebCore::ScrollingLayerPositionAction = WebCore::ScrollingLayerPositionAction::Sync) override;
void scrollingTreeNodeDidStopAnimatedScroll(WebCore::ScrollingTreeScrollingNode&) override;
bool scrollingTreeNodeRequestsScroll(WebCore::ScrollingNodeID, const WebCore::RequestedScrollData&) override;
bool scrollingTreeNodeRequestsKeyboardScroll(WebCore::ScrollingNodeID, const WebCore::RequestedKeyboardScrollData&) override;
void scrollingTreeNodeWillStartScroll(WebCore::ScrollingNodeID) override;
void scrollingTreeNodeDidEndScroll(WebCore::ScrollingNodeID) override;
void clearNodesWithUserScrollInProgress() override;
void scrollingTreeNodeDidBeginScrollSnapping(WebCore::ScrollingNodeID) override;
void scrollingTreeNodeDidEndScrollSnapping(WebCore::ScrollingNodeID) override;
void currentSnapPointIndicesDidChange(WebCore::ScrollingNodeID, std::optional<unsigned> horizontal, std::optional<unsigned> vertical) override;
void reportExposedUnfilledArea(MonotonicTime, unsigned unfilledArea) override;
void reportSynchronousScrollingReasonsChanged(MonotonicTime, OptionSet<WebCore::SynchronousScrollingReason>) override;
void tryToApplyLayerPositions();
protected:
explicit RemoteScrollingTree(RemoteScrollingCoordinatorProxy&);
Ref<WebCore::ScrollingTreeNode> createScrollingTreeNode(WebCore::ScrollingNodeType, WebCore::ScrollingNodeID) override;
void receivedWheelEventWithPhases(WebCore::PlatformWheelEventPhase phase, WebCore::PlatformWheelEventPhase momentumPhase) override;
void deferWheelEventTestCompletionForReason(WebCore::ScrollingNodeID, WebCore::WheelEventTestMonitor::DeferReason) override;
void removeWheelEventTestCompletionDeferralForReason(WebCore::ScrollingNodeID, WebCore::WheelEventTestMonitor::DeferReason) override;
void propagateSynchronousScrollingReasons(const HashSet<WebCore::ScrollingNodeID>&) WTF_REQUIRES_LOCK(m_treeLock) override;
// This gets nulled out via invalidate(), since the scrolling thread can hold a ref to the ScrollingTree after the RemoteScrollingCoordinatorProxy has gone away.
WeakPtr<RemoteScrollingCoordinatorProxy> m_scrollingCoordinatorProxy;
bool m_hasNodesWithSynchronousScrollingReasons WTF_GUARDED_BY_LOCK(m_treeLock) { false };
};
class RemoteLayerTreeHitTestLocker {
public:
RemoteLayerTreeHitTestLocker(RemoteScrollingTree& scrollingTree)
: m_scrollingTree(scrollingTree)
{
m_scrollingTree->lockLayersForHitTesting();
}
~RemoteLayerTreeHitTestLocker()
{
m_scrollingTree->unlockLayersForHitTesting();
}
private:
Ref<RemoteScrollingTree> m_scrollingTree;
};
} // namespace WebKit
SPECIALIZE_TYPE_TRAITS_SCROLLING_TREE(WebKit::RemoteScrollingTree, isRemoteScrollingTree());
#endif // ENABLE(UI_SIDE_COMPOSITING)
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