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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.
*/
#ifndef RemoteScrollingCoordinatorProxy_h
#define RemoteScrollingCoordinatorProxy_h
#if ENABLE(ASYNC_SCROLLING)
#include "MessageReceiver.h"
#include "RemoteScrollingCoordinator.h"
#include "RemoteScrollingTree.h"
#include <wtf/Noncopyable.h>
#include <wtf/RefPtr.h>
namespace WebCore {
class FloatPoint;
class PlatformWheelEvent;
}
namespace WebKit {
class RemoteLayerTreeHost;
class RemoteScrollingCoordinatorTransaction;
class RemoteScrollingTree;
class WebPageProxy;
class RemoteScrollingCoordinatorProxy {
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, WebCore::SetOrSyncScrollingLayerPosition);
void scrollingTreeNodeRequestsScroll(WebCore::ScrollingNodeID, const WebCore::FloatPoint& scrollPosition, bool representsProgrammaticScroll);
bool isPointInNonFastScrollableRegion(const WebCore::IntPoint&) const;
// Called externally when native views move around.
void viewportChangedViaDelegatedScrolling(WebCore::ScrollingNodeID, const WebCore::FloatRect& fixedPositionRect, double scale);
void currentSnapPointIndicesDidChange(WebCore::ScrollingNodeID, unsigned horizontal, unsigned vertical);
// FIXME: expose the tree and pass this to that?
bool handleWheelEvent(const WebCore::PlatformWheelEvent&);
WebCore::ScrollingNodeID rootScrollingNodeID() const;
const RemoteLayerTreeHost* layerTreeHost() const;
struct RequestedScrollInfo {
bool requestsScrollPositionUpdate { };
bool requestIsProgrammaticScroll { };
WebCore::FloatPoint requestedScrollPosition;
};
void updateScrollingTree(const RemoteScrollingCoordinatorTransaction&, RequestedScrollInfo&);
void setPropagatesMainFrameScrolls(bool propagatesMainFrameScrolls) { m_propagatesMainFrameScrolls = propagatesMainFrameScrolls; }
bool propagatesMainFrameScrolls() const { return m_propagatesMainFrameScrolls; }
bool hasFixedOrSticky() const { return m_scrollingTree->hasFixedOrSticky(); }
#if PLATFORM(IOS)
WebCore::FloatRect customFixedPositionRect() const;
void scrollingTreeNodeWillStartPanGesture();
void scrollingTreeNodeWillStartScroll();
void scrollingTreeNodeDidEndScroll();
#if ENABLE(CSS_SCROLL_SNAP)
void adjustTargetContentOffsetForSnapping(CGSize maxScrollDimensions, CGPoint velocity, CGFloat topInset, CGPoint* targetContentOffset);
bool hasActiveSnapPoint() const;
CGPoint nearestActiveContentInsetAdjustedSnapPoint(CGFloat topInset, const CGPoint&) const;
bool shouldSetScrollViewDecelerationRateFast() const;
#endif
#endif
private:
void connectStateNodeLayers(WebCore::ScrollingStateTree&, const RemoteLayerTreeHost&);
#if ENABLE(CSS_SCROLL_SNAP)
bool shouldSnapForMainFrameScrolling(WebCore::ScrollEventAxis) const;
float closestSnapOffsetForMainFrameScrolling(WebCore::ScrollEventAxis, float scrollDestination, float velocity, unsigned& closestIndex) const;
#endif
WebPageProxy& m_webPageProxy;
RefPtr<RemoteScrollingTree> m_scrollingTree;
RequestedScrollInfo* m_requestedScrollInfo;
#if ENABLE(CSS_SCROLL_SNAP)
unsigned m_currentHorizontalSnapPointIndex { 0 };
unsigned m_currentVerticalSnapPointIndex { 0 };
#endif
bool m_propagatesMainFrameScrolls;
};
} // namespace WebKit
#endif // ENABLE(ASYNC_SCROLLING)
#endif // RemoteScrollingCoordinatorProxy_h
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