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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 "ScrollingTreeNode.h"
#if ENABLE(THREADED_SCROLLING)
#include "ScrollingStateTree.h"
namespace WebCore {
ScrollingTreeNode::ScrollingTreeNode(ScrollingTree* scrollingTree, ScrollingNodeID nodeID)
: m_scrollingTree(scrollingTree)
, m_nodeID(nodeID)
, m_parent(0)
{
}
ScrollingTreeNode::~ScrollingTreeNode()
{
}
void ScrollingTreeNode::appendChild(PassOwnPtr<ScrollingTreeNode> childNode)
{
childNode->setParent(this);
if (!m_children)
m_children = adoptPtr(new Vector<OwnPtr<ScrollingTreeNode> >);
m_children->append(childNode);
}
void ScrollingTreeNode::removeChild(ScrollingTreeNode* node)
{
if (!m_children)
return;
size_t index = m_children->find(node);
// 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;
}
size_t size = m_children->size();
for (size_t i = 0; i < size; ++i)
m_children->at(i)->removeChild(node);
}
} // namespace WebCore
#endif // ENABLE(THREADED_SCROLLING)
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