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ChildNodeList.cpp
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92 lines (77 loc) · 2.42 KB
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/**
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2001 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2004, 2007, 2008, 2013 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "ChildNodeList.h"
#include "ElementIterator.h"
#include "NodeRareData.h"
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(EmptyNodeList);
WTF_MAKE_ISO_ALLOCATED_IMPL(ChildNodeList);
EmptyNodeList::~EmptyNodeList()
{
m_owner.get().nodeLists()->removeEmptyChildNodeList(this);
}
ChildNodeList::ChildNodeList(ContainerNode& parent)
: m_parent(parent)
{
}
ChildNodeList::~ChildNodeList()
{
m_parent.get().nodeLists()->removeChildNodeList(this);
}
unsigned ChildNodeList::length() const
{
return m_indexCache.nodeCount(*this);
}
Node* ChildNodeList::item(unsigned index) const
{
return m_indexCache.nodeAt(*this, index);
}
Node* ChildNodeList::collectionBegin() const
{
return m_parent->firstChild();
}
Node* ChildNodeList::collectionLast() const
{
return m_parent->lastChild();
}
void ChildNodeList::collectionTraverseForward(Node*& current, unsigned count, unsigned& traversedCount) const
{
ASSERT(count);
for (traversedCount = 0; traversedCount < count; ++traversedCount) {
current = current->nextSibling();
if (!current)
return;
}
}
void ChildNodeList::collectionTraverseBackward(Node*& current, unsigned count) const
{
ASSERT(count);
for (; count && current ; --count)
current = current->previousSibling();
}
void ChildNodeList::invalidateCache()
{
m_indexCache.invalidate();
}
} // namespace WebCore