96 lines
3.9 KiB
C++
96 lines
3.9 KiB
C++
/*
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* Copyright (C) 2014 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#if ENABLE(ASYNC_SCROLLING)
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#include "ScrollingTreeScrollingNode.h"
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namespace WebCore {
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class PlatformWheelEvent;
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class ScrollingTree;
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class WEBCORE_EXPORT ScrollingTreeFrameScrollingNode : public ScrollingTreeScrollingNode {
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public:
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virtual ~ScrollingTreeFrameScrollingNode();
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void commitStateBeforeChildren(const ScrollingStateNode&) override;
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bool fixedElementsLayoutRelativeToFrame() const { return m_fixedElementsLayoutRelativeToFrame; }
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bool visualViewportIsSmallerThanLayoutViewport() const { return m_visualViewportIsSmallerThanLayoutViewport; }
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FloatSize viewToContentsOffset(const FloatPoint& scrollPosition) const;
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FloatRect layoutViewport() const { return m_layoutViewport; };
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void setLayoutViewport(const FloatRect& r) { m_layoutViewport = r; };
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FloatRect layoutViewportRespectingRubberBanding() const;
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float frameScaleFactor() const { return m_frameScaleFactor; }
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protected:
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ScrollingTreeFrameScrollingNode(ScrollingTree&, ScrollingNodeType, ScrollingNodeID);
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int headerHeight() const { return m_headerHeight; }
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int footerHeight() const { return m_footerHeight; }
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float topContentInset() const { return m_topContentInset; }
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FloatPoint minLayoutViewportOrigin() const { return m_minLayoutViewportOrigin; }
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FloatPoint maxLayoutViewportOrigin() const { return m_maxLayoutViewportOrigin; }
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ScrollBehaviorForFixedElements scrollBehaviorForFixedElements() const { return m_behaviorForFixed; }
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private:
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void updateViewportForCurrentScrollPosition(std::optional<FloatRect>) override;
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bool scrollPositionAndLayoutViewportMatch(const FloatPoint& position, std::optional<FloatRect> overrideLayoutViewport) override;
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FloatRect layoutViewportForScrollPosition(const FloatPoint&, float scale, ScrollBehaviorForFixedElements = StickToDocumentBounds) const;
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void dumpProperties(WTF::TextStream&, ScrollingStateTreeAsTextBehavior) const override;
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FloatRect m_layoutViewport;
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FloatPoint m_minLayoutViewportOrigin;
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FloatPoint m_maxLayoutViewportOrigin;
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std::optional<FloatSize> m_overrideVisualViewportSize;
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float m_frameScaleFactor { 1 };
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float m_topContentInset { 0 };
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int m_headerHeight { 0 };
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int m_footerHeight { 0 };
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ScrollBehaviorForFixedElements m_behaviorForFixed { StickToDocumentBounds };
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bool m_fixedElementsLayoutRelativeToFrame { false };
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bool m_visualViewportIsSmallerThanLayoutViewport { false };
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};
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} // namespace WebCore
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SPECIALIZE_TYPE_TRAITS_SCROLLING_NODE(ScrollingTreeFrameScrollingNode, isFrameScrollingNode())
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#endif // ENABLE(ASYNC_SCROLLING)
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