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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 "ScrollingStateNode.h"
#if ENABLE(THREADED_SCROLLING) || USE(COORDINATED_GRAPHICS)
#include "ScrollingStateFixedNode.h"
#include "ScrollingStateTree.h"
#include "TextStream.h"
#include <wtf/text/WTFString.h>
namespace WebCore {
ScrollingStateNode::ScrollingStateNode(ScrollingStateTree* scrollingStateTree, ScrollingNodeID nodeID)
: m_scrollingStateTree(scrollingStateTree)
, m_nodeID(nodeID)
, m_changedProperties(0)
, m_parent(0)
{
}
// This copy constructor is used for cloning nodes in the tree, and it doesn't make sense
// to clone the relationship pointers, so don't copy that information from the original
// node.
ScrollingStateNode::ScrollingStateNode(const ScrollingStateNode& stateNode)
: m_scrollingStateTree(0)
, m_nodeID(stateNode.scrollingNodeID())
, m_changedProperties(stateNode.changedProperties())
, m_parent(0)
{
// FIXME: why doesn't this set the GraphicsLayer?
setScrollPlatformLayer(stateNode.platformScrollLayer());
}
ScrollingStateNode::~ScrollingStateNode()
{
}
PassOwnPtr<ScrollingStateNode> ScrollingStateNode::cloneAndReset()
{
OwnPtr<ScrollingStateNode> clone = this->clone();
// Now that this node is cloned, reset our change properties.
resetChangedProperties();
cloneAndResetChildren(clone.get());
return clone.release();
}
void ScrollingStateNode::cloneAndResetChildren(ScrollingStateNode* clone)
{
if (!m_children)
return;
size_t size = m_children->size();
for (size_t i = 0; i < size; ++i)
clone->appendChild(m_children->at(i)->cloneAndReset());
}
void ScrollingStateNode::appendChild(PassOwnPtr<ScrollingStateNode> childNode)
{
childNode->setParent(this);
if (!m_children)
m_children = adoptPtr(new Vector<OwnPtr<ScrollingStateNode> >);
m_children->append(childNode);
}
void ScrollingStateNode::removeChild(ScrollingStateNode* 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_scrollingStateTree->didRemoveNode(node->scrollingNodeID());
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);
}
void ScrollingStateNode::writeIndent(TextStream& ts, int indent)
{
for (int i = 0; i != indent; ++i)
ts << " ";
}
void ScrollingStateNode::dump(TextStream& ts, int indent) const
{
writeIndent(ts, indent);
dumpProperties(ts, indent);
if (m_children) {
writeIndent(ts, indent + 1);
size_t size = children()->size();
ts << "(children " << size << "\n";
for (size_t i = 0; i < size; i++)
m_children->at(i)->dump(ts, indent + 2);
writeIndent(ts, indent + 1);
ts << ")\n";
}
writeIndent(ts, indent);
ts << ")\n";
}
String ScrollingStateNode::scrollingStateTreeAsText() const
{
TextStream ts;
dump(ts, 0);
return ts.release();
}
} // namespace WebCore
#endif // ENABLE(THREADED_SCROLLING) || USE(COORDINATED_GRAPHICS)