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