third_party/WebKit/Source/core/html/LabelableElement.cpp

   1 /*
   2  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
   3  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
   4  *           (C) 2001 Dirk Mueller (mueller@kde.org)
   5  * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
   6  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Library General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Library General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Library General Public License
  19  * along with this library; see the file COPYING.LIB.  If not, write to
  20  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  21  * Boston, MA 02110-1301, USA.
  22  *
  23  */
  24
  25 #include "config.h"
  26 #include "core/html/LabelableElement.h"
  27
  28 #include "core/dom/NodeRareData.h"
  29 #include "core/html/LabelsNodeList.h"
  30
  31 namespace blink {
  32
  33 LabelableElement::LabelableElement(const QualifiedName& tagName, Document& document)
  34     : HTMLElement(tagName, document)
  35 {
  36 }
  37
  38 LabelableElement::~LabelableElement()
  39 {
  40 }
  41
  42 PassRefPtrWillBeRawPtr<LabelsNodeList> LabelableElement::labels()
  43 {
  44     if (!supportLabels())
  45         return nullptr;
  46
  47     return ensureCachedCollection<LabelsNodeList>(LabelsNodeListType);
  48 }
  49
  50 DEFINE_TRACE(LabelableElement)
  51 {
  52     HTMLElement::trace(visitor);
  53 }
  54
  55 } // namespace blink