168 lines
7.8 KiB
C++
168 lines
7.8 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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#include "config.h"
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#include "ScrollingTreeFrameScrollingNode.h"
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#if ENABLE(ASYNC_SCROLLING)
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#include "FrameView.h"
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#include "Logging.h"
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#include "ScrollingStateFrameScrollingNode.h"
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#include "ScrollingStateTree.h"
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#include "ScrollingTree.h"
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#include <wtf/text/TextStream.h>
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namespace WebCore {
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ScrollingTreeFrameScrollingNode::ScrollingTreeFrameScrollingNode(ScrollingTree& scrollingTree, ScrollingNodeType nodeType, ScrollingNodeID nodeID)
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: ScrollingTreeScrollingNode(scrollingTree, nodeType, nodeID)
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{
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ASSERT(isFrameScrollingNode());
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}
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ScrollingTreeFrameScrollingNode::~ScrollingTreeFrameScrollingNode() = default;
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void ScrollingTreeFrameScrollingNode::commitStateBeforeChildren(const ScrollingStateNode& stateNode)
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{
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ScrollingTreeScrollingNode::commitStateBeforeChildren(stateNode);
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const ScrollingStateFrameScrollingNode& state = downcast<ScrollingStateFrameScrollingNode>(stateNode);
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if (state.hasChangedProperty(ScrollingStateNode::Property::FrameScaleFactor))
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m_frameScaleFactor = state.frameScaleFactor();
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if (state.hasChangedProperty(ScrollingStateNode::Property::HeaderHeight))
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m_headerHeight = state.headerHeight();
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if (state.hasChangedProperty(ScrollingStateNode::Property::FooterHeight))
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m_footerHeight = state.footerHeight();
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if (state.hasChangedProperty(ScrollingStateNode::Property::BehaviorForFixedElements))
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m_behaviorForFixed = state.scrollBehaviorForFixedElements();
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if (state.hasChangedProperty(ScrollingStateNode::Property::TopContentInset))
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m_topContentInset = state.topContentInset();
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if (state.hasChangedProperty(ScrollingStateNode::Property::VisualViewportIsSmallerThanLayoutViewport))
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m_visualViewportIsSmallerThanLayoutViewport = state.visualViewportIsSmallerThanLayoutViewport();
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if (state.hasChangedProperty(ScrollingStateNode::Property::FixedElementsLayoutRelativeToFrame))
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m_fixedElementsLayoutRelativeToFrame = state.fixedElementsLayoutRelativeToFrame();
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if (state.hasChangedProperty(ScrollingStateNode::Property::LayoutViewport)) {
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m_layoutViewport = state.layoutViewport();
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updateViewportForCurrentScrollPosition({ });
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}
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if (state.hasChangedProperty(ScrollingStateNode::Property::MinLayoutViewportOrigin))
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m_minLayoutViewportOrigin = state.minLayoutViewportOrigin();
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if (state.hasChangedProperty(ScrollingStateNode::Property::MaxLayoutViewportOrigin))
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m_maxLayoutViewportOrigin = state.maxLayoutViewportOrigin();
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if (state.hasChangedProperty(ScrollingStateNode::Property::OverrideVisualViewportSize))
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m_overrideVisualViewportSize = state.overrideVisualViewportSize();
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}
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bool ScrollingTreeFrameScrollingNode::scrollPositionAndLayoutViewportMatch(const FloatPoint& position, std::optional<FloatRect> overrideLayoutViewport)
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{
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return position == currentScrollPosition() && (!overrideLayoutViewport || overrideLayoutViewport.value() == m_layoutViewport);
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}
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FloatRect ScrollingTreeFrameScrollingNode::layoutViewportForScrollPosition(const FloatPoint& visibleContentOrigin, float scale, ScrollBehaviorForFixedElements fixedBehavior) const
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{
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FloatSize visualViewportSize = m_overrideVisualViewportSize.value_or(scrollableAreaSize());
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FloatRect visibleContentRect(visibleContentOrigin, visualViewportSize);
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LayoutRect visualViewport(FrameView::visibleDocumentRect(visibleContentRect, headerHeight(), footerHeight(), totalContentsSize(), scale));
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LayoutRect layoutViewport(m_layoutViewport);
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LOG_WITH_STREAM(Scrolling, stream << "ScrollingTreeFrameScrollingNode " << scrollingNodeID() << " layoutViewportForScrollPosition: " << "(visibleContentOrigin " << visibleContentOrigin << ", visualViewportSize " << visualViewportSize << ") fixed behavior " << m_behaviorForFixed);
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LOG_WITH_STREAM(Scrolling, stream << " layoutViewport: " << layoutViewport);
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LOG_WITH_STREAM(Scrolling, stream << " visualViewport: " << visualViewport);
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LOG_WITH_STREAM(Scrolling, stream << " scroll positions: min: " << minLayoutViewportOrigin() << " max: "<< maxLayoutViewportOrigin());
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LayoutPoint newLocation = FrameView::computeLayoutViewportOrigin(LayoutRect(visualViewport), LayoutPoint(minLayoutViewportOrigin()), LayoutPoint(maxLayoutViewportOrigin()), layoutViewport, fixedBehavior);
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if (layoutViewport.location() != newLocation) {
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layoutViewport.setLocation(newLocation);
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LOG_WITH_STREAM(Scrolling, stream << " new layoutViewport " << layoutViewport);
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}
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return layoutViewport;
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}
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void ScrollingTreeFrameScrollingNode::updateViewportForCurrentScrollPosition(std::optional<FloatRect> overrideLayoutViewport)
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{
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if (overrideLayoutViewport)
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setLayoutViewport(overrideLayoutViewport.value());
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else
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setLayoutViewport(layoutViewportForScrollPosition(currentScrollPosition(), frameScaleFactor()));
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}
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FloatRect ScrollingTreeFrameScrollingNode::layoutViewportRespectingRubberBanding() const
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{
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return layoutViewportForScrollPosition(currentScrollPosition(), frameScaleFactor(), StickToViewportBounds);
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}
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FloatSize ScrollingTreeFrameScrollingNode::viewToContentsOffset(const FloatPoint& scrollPosition) const
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{
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return toFloatSize(scrollPosition) - FloatSize(0, headerHeight() + topContentInset());
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}
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void ScrollingTreeFrameScrollingNode::dumpProperties(TextStream& ts, ScrollingStateTreeAsTextBehavior behavior) const
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{
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ts << "frame scrolling node";
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ScrollingTreeScrollingNode::dumpProperties(ts, behavior);
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ts.dumpProperty("layout viewport", m_layoutViewport);
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ts.dumpProperty("min layoutViewport origin", m_minLayoutViewportOrigin);
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ts.dumpProperty("max layoutViewport origin", m_maxLayoutViewportOrigin);
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if (m_overrideVisualViewportSize)
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ts.dumpProperty("override visual viewport size", m_overrideVisualViewportSize.value());
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if (m_frameScaleFactor != 1)
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ts.dumpProperty("frame scale factor", m_frameScaleFactor);
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if (m_topContentInset)
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ts.dumpProperty("top content inset", m_topContentInset);
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if (m_headerHeight)
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ts.dumpProperty("header height", m_headerHeight);
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if (m_footerHeight)
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ts.dumpProperty("footer height", m_footerHeight);
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ts.dumpProperty("behavior for fixed", m_behaviorForFixed);
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if (m_fixedElementsLayoutRelativeToFrame)
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ts.dumpProperty("fixed elements lay out relative to frame", m_fixedElementsLayoutRelativeToFrame);
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if (m_visualViewportIsSmallerThanLayoutViewport)
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ts.dumpProperty("visual viewport is smaller than layout viewport", m_visualViewportIsSmallerThanLayoutViewport);
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}
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} // namespace WebCore
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#endif // ENABLE(ASYNC_SCROLLING)
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