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/*
* Copyright (C) 2012 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 "ScrollingTreePositionedNode.h"
#if ENABLE(ASYNC_SCROLLING)
#include "Logging.h"
#include "ScrollingStatePositionedNode.h"
#include "ScrollingTree.h"
#include "ScrollingTreeOverflowScrollingNode.h"
#include "ScrollingTreeScrollingNode.h"
#include <wtf/text/TextStream.h>
namespace WebCore {
ScrollingTreePositionedNode::ScrollingTreePositionedNode(ScrollingTree& scrollingTree, ScrollingNodeID nodeID)
: ScrollingTreeNode(scrollingTree, ScrollingNodeType::Positioned, nodeID)
{
}
ScrollingTreePositionedNode::~ScrollingTreePositionedNode() = default;
bool ScrollingTreePositionedNode::commitStateBeforeChildren(const ScrollingStateNode& stateNode)
{
if (!is<ScrollingStatePositionedNode>(stateNode))
return false;
const auto& positionedStateNode = downcast<ScrollingStatePositionedNode>(stateNode);
if (positionedStateNode.hasChangedProperty(ScrollingStateNode::Property::RelatedOverflowScrollingNodes))
m_relatedOverflowScrollingNodes = positionedStateNode.relatedOverflowScrollingNodes();
if (positionedStateNode.hasChangedProperty(ScrollingStateNode::Property::LayoutConstraintData))
m_constraints = positionedStateNode.layoutConstraints();
if (!m_relatedOverflowScrollingNodes.isEmpty())
scrollingTree().activePositionedNodes().add(*this);
return true;
}
FloatSize ScrollingTreePositionedNode::scrollDeltaSinceLastCommit() const
{
FloatSize delta;
for (auto nodeID : m_relatedOverflowScrollingNodes) {
if (auto* node = scrollingTree().nodeForID(nodeID)) {
if (is<ScrollingTreeOverflowScrollingNode>(node)) {
auto& overflowNode = downcast<ScrollingTreeOverflowScrollingNode>(*node);
delta += overflowNode.scrollDeltaSinceLastCommit();
}
}
}
// Positioned nodes compensate for scrolling, so negate the scroll delta.
return -delta;
}
void ScrollingTreePositionedNode::dumpProperties(TextStream& ts, OptionSet<ScrollingStateTreeAsTextBehavior> behavior) const
{
ts << "positioned node";
ScrollingTreeNode::dumpProperties(ts, behavior);
ts.dumpProperty("layout constraints", m_constraints);
ts.dumpProperty("related overflow nodes", m_relatedOverflowScrollingNodes.size());
if (behavior & ScrollingStateTreeAsTextBehavior::IncludeNodeIDs) {
if (!m_relatedOverflowScrollingNodes.isEmpty()) {
TextStream::GroupScope scope(ts);
ts << "overflow nodes";
for (auto nodeID : m_relatedOverflowScrollingNodes)
ts << "\n" << indent << "nodeID " << nodeID;
}
}
}
} // namespace WebCore
#endif // ENABLE(ASYNC_SCROLLING)
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