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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(UI_SIDE_COMPOSITING)
#include "MessageReceiver.h"
#include "RemoteScrollingCoordinator.h"
#include "RemoteScrollingTree.h"
#include "RemoteScrollingUIState.h"
#include <WebCore/GraphicsLayer.h>
#include <WebCore/ScrollSnapOffsetsInfo.h>
#include <wtf/Noncopyable.h>
#include <wtf/RefPtr.h>
OBJC_CLASS UIScrollView;
namespace WebCore {
class FloatPoint;
class PlatformWheelEvent;
}
namespace WebKit {
class RemoteLayerTreeHost;
class RemoteScrollingCoordinatorTransaction;
class RemoteScrollingTree;
class WebPageProxy;
class RemoteScrollingCoordinatorProxy {
WTF_MAKE_FAST_ALLOCATED;
WTF_MAKE_NONCOPYABLE(RemoteScrollingCoordinatorProxy);
public:
explicit RemoteScrollingCoordinatorProxy(WebPageProxy&);
virtual ~RemoteScrollingCoordinatorProxy();
// Inform the web process that the scroll position changed (called from the scrolling tree)
void scrollingTreeNodeDidScroll(WebCore::ScrollingNodeID, const WebCore::FloatPoint& newScrollPosition, const std::optional<WebCore::FloatPoint>& layoutViewportOrigin, WebCore::ScrollingLayerPositionAction);
bool scrollingTreeNodeRequestsScroll(WebCore::ScrollingNodeID, const WebCore::RequestedScrollData&);
void scrollingTreeNodeDidStopAnimatedScroll(WebCore::ScrollingNodeID);
WebCore::TrackingType eventTrackingTypeForPoint(const AtomString& eventName, WebCore::IntPoint) const;
// Called externally when native views move around.
void viewportChangedViaDelegatedScrolling(const WebCore::FloatPoint& scrollPosition, const WebCore::FloatRect& layoutViewport, double scale);
void applyScrollingTreeLayerPositionsAfterCommit();
void currentSnapPointIndicesDidChange(WebCore::ScrollingNodeID, std::optional<unsigned> horizontal, std::optional<unsigned> vertical);
// FIXME: expose the tree and pass this to that?
bool handleWheelEvent(const WebCore::PlatformWheelEvent&);
void handleMouseEvent(const WebCore::PlatformMouseEvent&);
WebCore::ScrollingNodeID rootScrollingNodeID() const;
const RemoteLayerTreeHost* layerTreeHost() const;
WebPageProxy& webPageProxy() const { return m_webPageProxy; }
std::optional<WebCore::RequestedScrollData> commitScrollingTreeState(const RemoteScrollingCoordinatorTransaction&);
void setPropagatesMainFrameScrolls(bool propagatesMainFrameScrolls) { m_propagatesMainFrameScrolls = propagatesMainFrameScrolls; }
bool propagatesMainFrameScrolls() const { return m_propagatesMainFrameScrolls; }
bool hasFixedOrSticky() const { return m_scrollingTree->hasFixedOrSticky(); }
bool hasScrollableMainFrame() const;
bool hasScrollableOrZoomedMainFrame() const;
#if PLATFORM(IOS_FAMILY)
UIScrollView *scrollViewForScrollingNodeID(WebCore::ScrollingNodeID) const;
WebCore::FloatRect currentLayoutViewport() const;
void scrollingTreeNodeWillStartPanGesture(WebCore::ScrollingNodeID);
void scrollingTreeNodeWillStartScroll(WebCore::ScrollingNodeID);
void scrollingTreeNodeDidEndScroll(WebCore::ScrollingNodeID);
void adjustTargetContentOffsetForSnapping(CGSize maxScrollDimensions, CGPoint velocity, CGFloat topInset, CGPoint currentContentOffset, CGPoint* targetContentOffset);
bool hasActiveSnapPoint() const;
CGPoint nearestActiveContentInsetAdjustedSnapOffset(CGFloat topInset, const CGPoint&) const;
bool shouldSetScrollViewDecelerationRateFast() const;
void setRootNodeIsInUserScroll(bool);
#endif
String scrollingTreeAsText() const;
OptionSet<WebCore::TouchAction> activeTouchActionsForTouchIdentifier(unsigned touchIdentifier) const;
void setTouchActionsForTouchIdentifier(OptionSet<WebCore::TouchAction>, unsigned);
void clearTouchActionsForTouchIdentifier(unsigned);
void resetStateAfterProcessExited();
private:
void connectStateNodeLayers(WebCore::ScrollingStateTree&, const RemoteLayerTreeHost&);
void establishLayerTreeScrollingRelations(const RemoteLayerTreeHost&);
bool shouldSnapForMainFrameScrolling(WebCore::ScrollEventAxis) const;
std::pair<float, std::optional<unsigned>> closestSnapOffsetForMainFrameScrolling(WebCore::ScrollEventAxis, float currentScrollOffset, WebCore::FloatPoint scrollDestination, float velocity) const;
void sendUIStateChangedIfNecessary();
WebPageProxy& m_webPageProxy;
RefPtr<RemoteScrollingTree> m_scrollingTree;
HashMap<unsigned, OptionSet<WebCore::TouchAction>> m_touchActionsByTouchIdentifier;
std::optional<WebCore::RequestedScrollData> m_requestedScroll;
RemoteScrollingUIState m_uiState;
std::optional<unsigned> m_currentHorizontalSnapPointIndex;
std::optional<unsigned> m_currentVerticalSnapPointIndex;
bool m_propagatesMainFrameScrolls { true };
HashSet<WebCore::GraphicsLayer::PlatformLayerID> m_layersWithScrollingRelations;
};
} // namespace WebKit
#endif // ENABLE(UI_SIDE_COMPOSITING)
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