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/*
* Copyright (C) 2011 Google 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. ``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
* 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 "TreeScope.h"
#include "Element.h"
#include "HTMLAnchorElement.h"
#include "HTMLMapElement.h"
#include "HTMLNames.h"
#include "NodeRareData.h"
namespace WebCore {
using namespace HTMLNames;
TreeScope::TreeScope(Document* document, ConstructionType constructionType)
: ContainerNode(0, constructionType)
, m_parentTreeScope(0)
, m_accessKeyMapValid(false)
, m_numNodeListCaches(0)
{
m_document = document;
if (document != this) {
// Assume document as parent scope
m_parentTreeScope = document;
// FIXME: This branch should be inert until shadow scopes are landed.
ASSERT_NOT_REACHED();
}
}
TreeScope::~TreeScope()
{
if (hasRareData())
rareData()->setTreeScope(0);
}
void TreeScope::destroyTreeScopeData()
{
m_elementsById.clear();
m_imageMapsByName.clear();
m_elementsByAccessKey.clear();
}
void TreeScope::setParentTreeScope(TreeScope* newParentScope)
{
// A document node cannot be re-parented.
ASSERT(!isDocumentNode());
// Every scope other than document needs a parent scope.
ASSERT(m_parentTreeScope);
ASSERT(newParentScope);
m_parentTreeScope = newParentScope;
}
Element* TreeScope::getElementById(const AtomicString& elementId) const
{
if (elementId.isEmpty())
return 0;
return m_elementsById.getElementById(elementId.impl(), this);
}
void TreeScope::addElementById(const AtomicString& elementId, Element* element)
{
m_elementsById.add(elementId.impl(), element);
}
void TreeScope::removeElementById(const AtomicString& elementId, Element* element)
{
m_elementsById.remove(elementId.impl(), element);
}
Element* TreeScope::getElementByAccessKey(const String& key) const
{
if (key.isEmpty())
return 0;
if (!m_accessKeyMapValid) {
for (Node* n = firstChild(); n; n = n->traverseNextNodeFastPath()) {
if (!n->isElementNode())
continue;
Element* element = static_cast<Element*>(n);
const AtomicString& accessKey = element->getAttribute(accesskeyAttr);
if (!accessKey.isEmpty())
m_elementsByAccessKey.set(accessKey.impl(), element);
}
m_accessKeyMapValid = true;
}
return m_elementsByAccessKey.get(key.impl());
}
void TreeScope::invalidateAccessKeyMap()
{
m_accessKeyMapValid = false;
m_elementsByAccessKey.clear();
}
void TreeScope::addImageMap(HTMLMapElement* imageMap)
{
AtomicStringImpl* name = imageMap->getName().impl();
if (!name)
return;
m_imageMapsByName.add(name, imageMap);
}
void TreeScope::removeImageMap(HTMLMapElement* imageMap)
{
AtomicStringImpl* name = imageMap->getName().impl();
if (!name)
return;
m_imageMapsByName.remove(name, imageMap);
}
HTMLMapElement* TreeScope::getImageMap(const String& url) const
{
if (url.isNull())
return 0;
size_t hashPos = url.find('#');
String name = (hashPos == notFound ? url : url.substring(hashPos + 1)).impl();
if (document()->isHTMLDocument())
return static_cast<HTMLMapElement*>(m_imageMapsByName.getElementByLowercasedMapName(AtomicString(name.lower()).impl(), this));
return static_cast<HTMLMapElement*>(m_imageMapsByName.getElementByMapName(AtomicString(name).impl(), this));
}
Element* TreeScope::findAnchor(const String& name)
{
if (name.isEmpty())
return 0;
if (Element* element = getElementById(name))
return element;
for (Node* node = this; node; node = node->traverseNextNodeFastPath()) {
if (node->hasTagName(aTag)) {
HTMLAnchorElement* anchor = static_cast<HTMLAnchorElement*>(node);
if (document()->inQuirksMode()) {
// Quirks mode, case insensitive comparison of names.
if (equalIgnoringCase(anchor->name(), name))
return anchor;
} else {
// Strict mode, names need to match exactly.
if (anchor->name() == name)
return anchor;
}
}
}
return 0;
}
} // namespace WebCore
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