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/*
* Copyright (C) 2014-2015 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(ASYNC_SCROLLING)
#include "MessageReceiver.h"
#include <WebCore/AsyncScrollingCoordinator.h>
#include <WebCore/ScrollTypes.h>
#include <WebCore/ScrollingConstraints.h>
#include <WebCore/Timer.h>
namespace IPC {
class Decoder;
class Encoder;
}
namespace WebKit {
class WebPage;
class RemoteScrollingCoordinatorTransaction;
class RemoteScrollingUIState;
class RemoteScrollingCoordinator final : public WebCore::AsyncScrollingCoordinator, public IPC::MessageReceiver {
public:
static Ref<RemoteScrollingCoordinator> create(WebPage* page)
{
return adoptRef(*new RemoteScrollingCoordinator(page));
}
void buildTransaction(RemoteScrollingCoordinatorTransaction&);
void scrollingStateInUIProcessChanged(const RemoteScrollingUIState&);
void addNodeWithActiveRubberBanding(WebCore::ScrollingNodeID);
void removeNodeWithActiveRubberBanding(WebCore::ScrollingNodeID);
void setCurrentWheelEventWillStartSwipe(std::optional<bool> value) { m_currentWheelEventWillStartSwipe = value; }
struct NodeAndGestureState {
WebCore::ScrollingNodeID wheelGestureNode { 0 };
std::optional<WebCore::WheelScrollGestureState> wheelGestureState;
};
NodeAndGestureState takeCurrentWheelGestureInfo() { return std::exchange(m_currentWheelGestureInfo, { }); }
private:
RemoteScrollingCoordinator(WebPage*);
virtual ~RemoteScrollingCoordinator();
bool isRemoteScrollingCoordinator() const override { return true; }
// ScrollingCoordinator
bool coordinatesScrollingForFrameView(const WebCore::LocalFrameView&) const override;
void scheduleTreeStateCommit() override;
bool isRubberBandInProgress(WebCore::ScrollingNodeID) const final;
bool isUserScrollInProgress(WebCore::ScrollingNodeID) const final;
bool isScrollSnapInProgress(WebCore::ScrollingNodeID) const final;
void setScrollPinningBehavior(WebCore::ScrollPinningBehavior) override;
void startMonitoringWheelEvents(bool clearLatchingState) final;
// IPC::MessageReceiver
void didReceiveMessage(IPC::Connection&, IPC::Decoder&) override;
// Respond to UI process changes.
void scrollPositionChangedForNode(WebCore::ScrollingNodeID, const WebCore::FloatPoint& scrollPosition, std::optional<WebCore::FloatPoint> layoutViewportOrigin, bool syncLayerPosition, CompletionHandler<void()>&&);
void animatedScrollDidEndForNode(WebCore::ScrollingNodeID);
void currentSnapPointIndicesChangedForNode(WebCore::ScrollingNodeID, std::optional<unsigned> horizontal, std::optional<unsigned> vertical);
void receivedWheelEventWithPhases(WebCore::PlatformWheelEventPhase phase, WebCore::PlatformWheelEventPhase momentumPhase);
void startDeferringScrollingTestCompletionForNode(WebCore::ScrollingNodeID, WebCore::WheelEventTestMonitor::DeferReason);
void stopDeferringScrollingTestCompletionForNode(WebCore::ScrollingNodeID, WebCore::WheelEventTestMonitor::DeferReason);
void scrollingTreeNodeScrollbarVisibilityDidChange(WebCore::ScrollingNodeID, WebCore::ScrollbarOrientation, bool);
void scrollingTreeNodeScrollbarMinimumThumbLengthDidChange(WebCore::ScrollingNodeID nodeID, WebCore::ScrollbarOrientation orientation, int minimumThumbLength);
WebCore::WheelEventHandlingResult handleWheelEventForScrolling(const WebCore::PlatformWheelEvent&, WebCore::ScrollingNodeID, std::optional<WebCore::WheelScrollGestureState>) override;
WeakPtr<WebPage> m_webPage;
HashSet<WebCore::ScrollingNodeID> m_nodesWithActiveRubberBanding;
HashSet<WebCore::ScrollingNodeID> m_nodesWithActiveScrollSnap;
HashSet<WebCore::ScrollingNodeID> m_nodesWithActiveUserScrolls;
NodeAndGestureState m_currentWheelGestureInfo;
bool m_clearScrollLatchingInNextTransaction { false };
std::optional<bool> m_currentWheelEventWillStartSwipe;
};
} // namespace WebKit
SPECIALIZE_TYPE_TRAITS_SCROLLING_COORDINATOR(WebKit::RemoteScrollingCoordinator, isRemoteScrollingCoordinator());
#endif // ENABLE(ASYNC_SCROLLING)
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