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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(ASYNC_SCROLLING)
#include "ScrollingTreeScrollingNode.h"
namespace WebCore {
class PlatformWheelEvent;
class ScrollingTree;
class WEBCORE_EXPORT ScrollingTreeFrameScrollingNode : public ScrollingTreeScrollingNode {
public:
virtual ~ScrollingTreeFrameScrollingNode();
bool commitStateBeforeChildren(const ScrollingStateNode&) override;
bool fixedElementsLayoutRelativeToFrame() const { return m_fixedElementsLayoutRelativeToFrame; }
bool visualViewportIsSmallerThanLayoutViewport() const { return m_visualViewportIsSmallerThanLayoutViewport; }
FloatSize viewToContentsOffset(const FloatPoint& scrollPosition) const;
FloatRect layoutViewport() const { return m_layoutViewport; };
void setLayoutViewport(const FloatRect& r) { m_layoutViewport = r; };
FloatRect layoutViewportRespectingRubberBanding() const;
float frameScaleFactor() const { return m_frameScaleFactor; }
int headerHeight() const { return m_headerHeight; }
int footerHeight() const { return m_footerHeight; }
float topContentInset() const { return m_topContentInset; }
virtual void viewWillStartLiveResize() { }
virtual void viewWillEndLiveResize() { }
virtual void viewSizeDidChange() { }
protected:
ScrollingTreeFrameScrollingNode(ScrollingTree&, ScrollingNodeType, ScrollingNodeID);
FloatPoint minLayoutViewportOrigin() const { return m_minLayoutViewportOrigin; }
FloatPoint maxLayoutViewportOrigin() const { return m_maxLayoutViewportOrigin; }
ScrollBehaviorForFixedElements scrollBehaviorForFixedElements() const { return m_behaviorForFixed; }
private:
void updateViewportForCurrentScrollPosition(std::optional<FloatRect>) override;
bool scrollPositionAndLayoutViewportMatch(const FloatPoint& position, std::optional<FloatRect> overrideLayoutViewport) override;
FloatRect layoutViewportForScrollPosition(const FloatPoint&, float scale, ScrollBehaviorForFixedElements = StickToDocumentBounds) const;
void dumpProperties(WTF::TextStream&, OptionSet<ScrollingStateTreeAsTextBehavior>) const override;
FloatRect m_layoutViewport;
FloatPoint m_minLayoutViewportOrigin;
FloatPoint m_maxLayoutViewportOrigin;
std::optional<FloatSize> m_overrideVisualViewportSize;
float m_frameScaleFactor { 1 };
float m_topContentInset { 0 };
int m_headerHeight { 0 };
int m_footerHeight { 0 };
ScrollBehaviorForFixedElements m_behaviorForFixed { StickToDocumentBounds };
bool m_fixedElementsLayoutRelativeToFrame { false };
bool m_visualViewportIsSmallerThanLayoutViewport { false };
};
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_SCROLLING_NODE(ScrollingTreeFrameScrollingNode, isFrameScrollingNode())
#endif // ENABLE(ASYNC_SCROLLING)
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