| /* |
| * 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 |