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/*
* Copyright (C) 2012-2022 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 "ScrollingTreeNode.h"
#if ENABLE(ASYNC_SCROLLING)
#include "ScrollingStateTree.h"
#include "ScrollingTree.h"
#include "ScrollingTreeFrameScrollingNode.h"
#include <wtf/text/TextStream.h>
namespace WebCore {
ScrollingTreeNode::ScrollingTreeNode(ScrollingTree& scrollingTree, ScrollingNodeType nodeType, ScrollingNodeID nodeID)
: m_scrollingTree(scrollingTree)
, m_nodeType(nodeType)
, m_nodeID(nodeID)
{
}
ScrollingTreeNode::~ScrollingTreeNode() = default;
void ScrollingTreeNode::appendChild(Ref<ScrollingTreeNode>&& childNode)
{
RELEASE_ASSERT(m_scrollingTree.inCommitTreeState());
childNode->setParent(this);
m_children.append(WTFMove(childNode));
}
void ScrollingTreeNode::removeChild(ScrollingTreeNode& node)
{
RELEASE_ASSERT(m_scrollingTree.inCommitTreeState());
size_t index = m_children.findIf([&](auto& child) {
return &node == child.ptr();
});
// The index will be notFound if the node to remove is a deeper-than-1-level descendant or
// if node is the root state node.
if (index != notFound) {
m_children.remove(index);
return;
}
for (auto& child : m_children)
child->removeChild(node);
}
void ScrollingTreeNode::removeAllChildren()
{
RELEASE_ASSERT(m_scrollingTree.inCommitTreeState());
m_children.clear();
}
bool ScrollingTreeNode::isRootNode() const
{
return m_scrollingTree.rootNode() == this;
}
void ScrollingTreeNode::dumpProperties(TextStream& ts, OptionSet<ScrollingStateTreeAsTextBehavior> behavior) const
{
if (behavior & ScrollingStateTreeAsTextBehavior::IncludeNodeIDs)
ts.dumpProperty("nodeID", scrollingNodeID());
}
RefPtr<ScrollingTreeFrameScrollingNode> ScrollingTreeNode::enclosingFrameNodeIncludingSelf()
{
RefPtr node = this;
while (node && !node->isFrameScrollingNode())
node = node->parent();
return downcast<ScrollingTreeFrameScrollingNode>(node.get());
}
RefPtr<ScrollingTreeScrollingNode> ScrollingTreeNode::enclosingScrollingNodeIncludingSelf()
{
RefPtr node = this;
while (node && !node->isScrollingNode())
node = node->parent();
return downcast<ScrollingTreeScrollingNode>(node.get());
}
void ScrollingTreeNode::dump(TextStream& ts, OptionSet<ScrollingStateTreeAsTextBehavior> behavior) const
{
dumpProperties(ts, behavior);
for (auto& child : m_children) {
TextStream::GroupScope scope(ts);
child->dump(ts, behavior);
}
}
} // namespace WebCore
#endif // ENABLE(ASYNC_SCROLLING)
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