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/*
* Copyright (C) 2012, 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) && PLATFORM(MAC)
#include "ScrollbarThemeMac.h"
#include "ScrollingStateFrameScrollingNode.h"
#include "ScrollingTreeFrameScrollingNode.h"
#include "ScrollingTreeScrollingNodeDelegateMac.h"
#include <wtf/RetainPtr.h>
OBJC_CLASS CALayer;
namespace WebCore {
class WEBCORE_EXPORT ScrollingTreeFrameScrollingNodeMac : public ScrollingTreeFrameScrollingNode {
public:
static Ref<ScrollingTreeFrameScrollingNode> create(ScrollingTree&, ScrollingNodeType, ScrollingNodeID);
virtual ~ScrollingTreeFrameScrollingNodeMac();
protected:
ScrollingTreeFrameScrollingNodeMac(ScrollingTree&, ScrollingNodeType, ScrollingNodeID);
// ScrollingTreeNode member functions.
void commitStateBeforeChildren(const ScrollingStateNode&) override;
void commitStateAfterChildren(const ScrollingStateNode&) override;
ScrollingEventResult handleWheelEvent(const PlatformWheelEvent&) override;
WEBCORE_EXPORT void repositionRelatedLayers() override;
FloatPoint minimumScrollPosition() const override;
FloatPoint maximumScrollPosition() const override;
void updateMainFramePinState();
unsigned exposedUnfilledArea() const;
private:
FloatPoint adjustedScrollPosition(const FloatPoint&, ScrollPositionClamp) const override;
void currentScrollPositionChanged() override;
void repositionScrollingLayers() override;
ScrollingTreeScrollingNodeDelegateMac m_delegate;
RetainPtr<CALayer> m_rootContentsLayer;
RetainPtr<CALayer> m_counterScrollingLayer;
RetainPtr<CALayer> m_insetClipLayer;
RetainPtr<CALayer> m_contentShadowLayer;
RetainPtr<CALayer> m_headerLayer;
RetainPtr<CALayer> m_footerLayer;
bool m_lastScrollHadUnfilledPixels { false };
bool m_hadFirstUpdate { false };
};
} // namespace WebCore
#endif // ENABLE(ASYNC_SCROLLING) && PLATFORM(MAC)