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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, 2006, 2007, 2008, 2010, 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 "LiveNodeList.h"
#include "ClassNodeList.h"
#include "Element.h"
#include "ElementTraversal.h"
#include "HTMLCollection.h"
#include "TagNodeList.h"
namespace WebCore {
ContainerNode& LiveNodeList::rootNode() const
{
if (isRootedAtDocument() && ownerNode().inDocument())
return ownerNode().document();
return ownerNode();
}
template <class NodeListType>
inline bool isMatchingElement(const NodeListType*, Element*);
template <> inline bool isMatchingElement(const LiveNodeList* nodeList, Element* element)
{
return nodeList->nodeMatches(element);
}
template <> inline bool isMatchingElement(const HTMLTagNodeList* nodeList, Element* element)
{
return nodeList->nodeMatchesInlined(element);
}
template <> inline bool isMatchingElement(const ClassNodeList* nodeList, Element* element)
{
return nodeList->nodeMatchesInlined(element);
}
ALWAYS_INLINE Element* LiveNodeList::iterateForPreviousElement(Element* current) const
{
ContainerNode& rootNode = this->rootNode();
for (; current; current = ElementTraversal::previous(current, &rootNode)) {
if (isMatchingElement(static_cast<const LiveNodeList*>(this), current))
return current;
}
return 0;
}
template <class NodeListType>
inline Element* firstMatchingElement(const NodeListType* nodeList, ContainerNode& root)
{
Element* element = ElementTraversal::firstWithin(&root);
while (element && !isMatchingElement(nodeList, element))
element = ElementTraversal::next(element, &root);
return element;
}
template <class NodeListType>
inline Element* nextMatchingElement(const NodeListType* nodeList, Element* current, ContainerNode& root)
{
do {
current = ElementTraversal::next(current, &root);
} while (current && !isMatchingElement(nodeList, current));
return current;
}
template <class NodeListType>
inline Element* traverseMatchingElementsForward(const NodeListType* nodeList, Element& current, unsigned count, unsigned& traversedCount, ContainerNode& root)
{
Element* element = ¤t;
for (traversedCount = 0; traversedCount < count; ++traversedCount) {
element = nextMatchingElement(nodeList, element, root);
if (!element)
return nullptr;
}
return element;
}
Element* LiveNodeList::collectionFirst() const
{
auto& root = rootNode();
if (type() == HTMLTagNodeListType)
return firstMatchingElement(static_cast<const HTMLTagNodeList*>(this), root);
if (type() == ClassNodeListType)
return firstMatchingElement(static_cast<const ClassNodeList*>(this), root);
return firstMatchingElement(static_cast<const LiveNodeList*>(this), root);
}
Element* LiveNodeList::collectionLast() const
{
// FIXME: This should be optimized similarly to the forward case.
return iterateForPreviousElement(ElementTraversal::lastWithin(&rootNode()));
}
Element* LiveNodeList::collectionTraverseForward(Element& current, unsigned count, unsigned& traversedCount) const
{
auto& root = rootNode();
if (type() == HTMLTagNodeListType)
return traverseMatchingElementsForward(static_cast<const HTMLTagNodeList*>(this), current, count, traversedCount, root);
if (type() == ClassNodeListType)
return traverseMatchingElementsForward(static_cast<const ClassNodeList*>(this), current, count, traversedCount, root);
return traverseMatchingElementsForward(static_cast<const LiveNodeList*>(this), current, count, traversedCount, root);
}
Element* LiveNodeList::collectionTraverseBackward(Element& current, unsigned count) const
{
// FIXME: This should be optimized similarly to the forward case.
auto& root = rootNode();
Element* element = ¤t;
for (; count && element ; --count)
element = iterateForPreviousElement(ElementTraversal::previous(element, &root));
return element;
}
unsigned LiveNodeList::length() const
{
return m_indexCache.nodeCount(*this);
}
Node* LiveNodeList::item(unsigned offset) const
{
return m_indexCache.nodeAt(*this, offset);
}
void LiveNodeList::invalidateCache() const
{
m_indexCache.invalidate();
}
Node* LiveNodeList::namedItem(const AtomicString& elementId) const
{
// FIXME: Why doesn't this look into the name attribute like HTMLCollection::namedItem does?
Node& rootNode = this->rootNode();
if (rootNode.inDocument()) {
Element* element = rootNode.treeScope().getElementById(elementId);
if (element && nodeMatches(element) && element->isDescendantOf(&rootNode))
return element;
if (!element)
return 0;
// In the case of multiple nodes with the same name, just fall through.
}
unsigned length = this->length();
for (unsigned i = 0; i < length; i++) {
Node* node = item(i);
if (!node->isElementNode())
continue;
Element* element = toElement(node);
// FIXME: This should probably be using getIdAttribute instead of idForStyleResolution.
if (element->hasID() && element->idForStyleResolution() == elementId)
return node;
}
return 0;
}
} // namespace WebCore
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