151 lines
4.3 KiB
C++
151 lines
4.3 KiB
C++
/*
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
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* (C) 1999 Antti Koivisto (koivisto@kde.org)
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* (C) 2001 Peter Kelly (pmk@post.com)
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* (C) 2001 Dirk Mueller (mueller@kde.org)
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* Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010, 2012 Apple Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "config.h"
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#include "Attr.h"
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#include "AttributeChangeInvalidation.h"
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#include "Event.h"
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#include "ScopedEventQueue.h"
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#include "StyleProperties.h"
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#include "StyledElement.h"
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#include "TextNodeTraversal.h"
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#include "XMLNSNames.h"
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#include <wtf/IsoMallocInlines.h>
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#include <wtf/text/AtomString.h>
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namespace WebCore {
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WTF_MAKE_ISO_ALLOCATED_IMPL(Attr);
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using namespace HTMLNames;
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Attr::Attr(Element& element, const QualifiedName& name)
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: Node(element.document(), CreateOther)
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, m_element(&element)
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, m_name(name)
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{
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}
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Attr::Attr(Document& document, const QualifiedName& name, const AtomString& standaloneValue)
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: Node(document, CreateOther)
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, m_name(name)
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, m_standaloneValue(standaloneValue)
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{
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}
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Ref<Attr> Attr::create(Element& element, const QualifiedName& name)
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{
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return adoptRef(*new Attr(element, name));
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}
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Ref<Attr> Attr::create(Document& document, const QualifiedName& name, const AtomString& value)
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{
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return adoptRef(*new Attr(document, name, value));
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}
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Attr::~Attr()
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{
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ASSERT_WITH_SECURITY_IMPLICATION(!isInShadowTree());
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ASSERT_WITH_SECURITY_IMPLICATION(treeScope().rootNode().isDocumentNode());
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}
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ExceptionOr<void> Attr::setPrefix(const AtomString& prefix)
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{
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auto result = checkSetPrefix(prefix);
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if (result.hasException())
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return result.releaseException();
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if ((prefix == xmlnsAtom() && namespaceURI() != XMLNSNames::xmlnsNamespaceURI) || qualifiedName() == xmlnsAtom())
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return Exception { NamespaceError };
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const AtomString& newPrefix = prefix.isEmpty() ? nullAtom() : prefix;
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if (m_element)
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elementAttribute().setPrefix(newPrefix);
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m_name.setPrefix(newPrefix);
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return { };
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}
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void Attr::setValue(const AtomString& value)
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{
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if (m_element)
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m_element->setAttribute(qualifiedName(), value);
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else
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m_standaloneValue = value;
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}
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ExceptionOr<void> Attr::setNodeValue(const String& value)
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{
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setValue(value);
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return { };
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}
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Ref<Node> Attr::cloneNodeInternal(Document& targetDocument, CloningOperation)
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{
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return adoptRef(*new Attr(targetDocument, qualifiedName(), value()));
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}
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CSSStyleDeclaration* Attr::style()
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{
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// This is not part of the DOM API, and therefore not available to webpages. However, WebKit SPI
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// lets clients use this via the Objective-C and JavaScript bindings.
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if (!is<StyledElement>(m_element))
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return nullptr;
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m_style = MutableStyleProperties::create();
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downcast<StyledElement>(*m_element).collectPresentationalHintsForAttribute(qualifiedName(), value(), *m_style);
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return &m_style->ensureCSSStyleDeclaration();
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}
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const AtomString& Attr::value() const
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{
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if (m_element)
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return m_element->getAttribute(qualifiedName());
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return m_standaloneValue;
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}
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Attribute& Attr::elementAttribute()
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{
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ASSERT(m_element);
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ASSERT(m_element->elementData());
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return *m_element->ensureUniqueElementData().findAttributeByName(qualifiedName());
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}
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void Attr::detachFromElementWithValue(const AtomString& value)
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{
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ASSERT(m_element);
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ASSERT(m_standaloneValue.isNull());
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m_standaloneValue = value;
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m_element = nullptr;
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setTreeScopeRecursively(document());
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}
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void Attr::attachToElement(Element& element)
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{
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ASSERT(!m_element);
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m_element = &element;
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m_standaloneValue = nullAtom();
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setTreeScopeRecursively(element.treeScope());
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}
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}
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