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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2001 Peter Kelly (pmk@post.com)
* (C) 2001 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010, 2012 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 "third_party/blink/renderer/core/dom/attr.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/dom/element.h"
#include "third_party/blink/renderer/core/dom/events/scoped_event_queue.h"
#include "third_party/blink/renderer/core/dom/text.h"
#include "third_party/blink/renderer/platform/bindings/exception_state.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string.h"
#include "third_party/blink/renderer/platform/wtf/text/string_builder.h"
namespace blink {
Attr::Attr(Element& element, const QualifiedName& name)
: Node(&element.GetDocument(), kCreateOther),
element_(&element),
name_(name) {}
Attr::Attr(Document& document,
const QualifiedName& name,
const AtomicString& standalone_value)
: Node(&document, kCreateOther),
name_(name),
standalone_value_or_attached_local_name_(standalone_value) {}
Attr* Attr::Create(Element& element, const QualifiedName& name) {
return new Attr(element, name);
}
Attr* Attr::Create(Document& document,
const QualifiedName& name,
const AtomicString& value) {
return new Attr(document, name, value);
}
Attr::~Attr() = default;
const QualifiedName Attr::GetQualifiedName() const {
if (element_ && !standalone_value_or_attached_local_name_.IsNull()) {
// In the unlikely case the Element attribute has a local name
// that differs by case, construct the qualified name based on
// it. This is the qualified name that must be used when
// looking up the attribute on the element.
return QualifiedName(name_.Prefix(),
standalone_value_or_attached_local_name_,
name_.NamespaceURI());
}
return name_;
}
const AtomicString& Attr::value() const {
if (element_)
return element_->getAttribute(GetQualifiedName());
return standalone_value_or_attached_local_name_;
}
void Attr::setValue(const AtomicString& value) {
// Element::setAttribute will remove the attribute if value is null.
DCHECK(!value.IsNull());
if (element_)
element_->setAttribute(GetQualifiedName(), value);
else
standalone_value_or_attached_local_name_ = value;
}
void Attr::setNodeValue(const String& v) {
// Attr uses AtomicString type for its value to save memory as there
// is duplication among Elements' attributes values.
setValue(v.IsNull() ? g_empty_atom : AtomicString(v));
}
Node* Attr::Clone(Document& factory, CloneChildrenFlag) const {
return new Attr(factory, name_, value());
}
void Attr::DetachFromElementWithValue(const AtomicString& value) {
DCHECK(element_);
standalone_value_or_attached_local_name_ = value;
element_ = nullptr;
}
void Attr::AttachToElement(Element* element,
const AtomicString& attached_local_name) {
DCHECK(!element_);
element_ = element;
standalone_value_or_attached_local_name_ = attached_local_name;
}
void Attr::Trace(blink::Visitor* visitor) {
visitor->Trace(element_);
Node::Trace(visitor);
}
} // namespace blink
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