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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) 2003, 2010 Apple Inc. All rights reserved.
* (C) 2007 Rob Buis (buis@kde.org)
*
* 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 "HTMLStyleElement.h"
#include "Attribute.h"
#include "Document.h"
#include "HTMLNames.h"
#include "ScriptEventListener.h"
#include "ScriptableDocumentParser.h"
namespace WebCore {
using namespace HTMLNames;
inline HTMLStyleElement::HTMLStyleElement(const QualifiedName& tagName, Document* document, bool createdByParser)
: HTMLElement(tagName, document)
, StyleElement(document, createdByParser)
#if ENABLE(STYLE_SCOPED)
, m_isRegisteredWithScopingNode(false)
#endif
{
ASSERT(hasTagName(styleTag));
}
HTMLStyleElement::~HTMLStyleElement()
{
// During tear-down, willRemove isn't called, so m_isRegisteredWithScopingNode may still be set here.
// Therefore we can't ASSERT(!m_isRegisteredWithScopingNode).
StyleElement::clearDocumentData(document(), this);
}
PassRefPtr<HTMLStyleElement> HTMLStyleElement::create(const QualifiedName& tagName, Document* document, bool createdByParser)
{
return adoptRef(new HTMLStyleElement(tagName, document, createdByParser));
}
void HTMLStyleElement::parseAttribute(Attribute* attr)
{
if (attr->name() == titleAttr && m_sheet)
m_sheet->setTitle(attr->value());
#if ENABLE(STYLE_SCOPED)
else if (attr->name() == scopedAttr) {
if (!attr->isNull() && !m_isRegisteredWithScopingNode && inDocument())
registerWithScopingNode();
else if (attr->isNull() && m_isRegisteredWithScopingNode)
unregisterWithScopingNode();
}
#endif
else
HTMLElement::parseAttribute(attr);
}
void HTMLStyleElement::finishParsingChildren()
{
StyleElement::finishParsingChildren(this);
HTMLElement::finishParsingChildren();
}
#if ENABLE(STYLE_SCOPED)
void HTMLStyleElement::registerWithScopingNode()
{
// Note: We cannot rely on the 'scoped' element already being present when this method is invoked.
// Therefore we cannot rely on scoped()!
ASSERT(!m_isRegisteredWithScopingNode);
ASSERT(inDocument());
if (!m_isRegisteredWithScopingNode) {
ContainerNode* scope = parentNode();
if (!scope)
return;
if (!scope->isElementNode() && !scope->isShadowRoot()) {
// DocumentFragment nodes should never be inDocument,
// <style> should not be a child of Document, PI or some such.
ASSERT_NOT_REACHED();
return;
}
scope->registerScopedHTMLStyleChild();
scope->setNeedsStyleRecalc();
if (inDocument() && !document()->parsing() && document()->renderer())
document()->styleSelectorChanged(DeferRecalcStyle);
m_isRegisteredWithScopingNode = true;
}
}
void HTMLStyleElement::unregisterWithScopingNode()
{
// Note: We cannot rely on the 'scoped' element still being present when this method is invoked.
// Therefore we cannot rely on scoped()!
ASSERT(m_isRegisteredWithScopingNode);
if (m_isRegisteredWithScopingNode) {
ContainerNode* scope = parentNode();
ASSERT(scope);
if (scope) {
ASSERT(scope->hasScopedHTMLStyleChild());
scope->unregisterScopedHTMLStyleChild();
scope->setNeedsStyleRecalc();
}
if (inDocument() && !document()->parsing() && document()->renderer())
document()->styleSelectorChanged(DeferRecalcStyle);
m_isRegisteredWithScopingNode = false;
}
}
#endif
void HTMLStyleElement::insertedIntoDocument()
{
HTMLElement::insertedIntoDocument();
StyleElement::insertedIntoDocument(document(), this);
#if ENABLE(STYLE_SCOPED)
if (scoped() && !m_isRegisteredWithScopingNode)
registerWithScopingNode();
#endif
}
void HTMLStyleElement::removedFromDocument()
{
#if ENABLE(STYLE_SCOPED)
ASSERT(!m_isRegisteredWithScopingNode);
#endif
HTMLElement::removedFromDocument();
StyleElement::removedFromDocument(document(), this);
}
#if ENABLE(STYLE_SCOPED)
void HTMLStyleElement::willRemove()
{
// In the current implementation, <style scoped> is only registered if the node is in the document.
// That is, because willRemove() is also called if an ancestor is removed from the document.
// Now, if we want to register <style scoped> even if it's not inDocument,
// we'd need to find a way to discern whether that is the case, or whether <style scoped> itself is about to be removed.
ASSERT(!scoped() || !inDocument() || m_isRegisteredWithScopingNode);
if (m_isRegisteredWithScopingNode)
unregisterWithScopingNode();
HTMLElement::willRemove();
}
#endif
void HTMLStyleElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
{
StyleElement::childrenChanged(this);
HTMLElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
}
const AtomicString& HTMLStyleElement::media() const
{
return getAttribute(mediaAttr);
}
const AtomicString& HTMLStyleElement::type() const
{
return getAttribute(typeAttr);
}
#if ENABLE(STYLE_SCOPED)
bool HTMLStyleElement::scoped() const
{
return fastHasAttribute(scopedAttr);
}
void HTMLStyleElement::setScoped(bool scopedValue)
{
setBooleanAttribute(scopedAttr, scopedValue);
}
Element* HTMLStyleElement::scopingElement() const
{
if (!scoped())
return 0;
// FIXME: This probably needs to be refined for scoped stylesheets within shadow DOM.
// As written, such a stylesheet could style the host element, as well as children of the host.
// OTOH, this paves the way for a :bound-element implementation.
ContainerNode* parentOrHost = parentOrHostNode();
if (!parentOrHost || !parentOrHost->isElementNode())
return 0;
return toElement(parentOrHost);
}
#endif // ENABLE(STYLE_SCOPED)
void HTMLStyleElement::addSubresourceAttributeURLs(ListHashSet<KURL>& urls) const
{
HTMLElement::addSubresourceAttributeURLs(urls);
if (CSSStyleSheet* styleSheet = const_cast<HTMLStyleElement*>(this)->sheet())
styleSheet->addSubresourceStyleURLs(urls);
}
bool HTMLStyleElement::disabled() const
{
if (!m_sheet)
return false;
return m_sheet->disabled();
}
void HTMLStyleElement::setDisabled(bool setDisabled)
{
if (CSSStyleSheet* styleSheet = sheet())
styleSheet->setDisabled(setDisabled);
}
}
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