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