third_party/WebKit/Source/core/dom/ClassCollection.h

/*
 * Copyright (C) 2007 Apple Inc. All rights reserved.
 * Copyright (C) 2007 David Smith (catfish.man@gmail.com)
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef ClassCollection_h
#define ClassCollection_h

#include "core/dom/Element.h"
#include "core/dom/SpaceSplitString.h"
#include "core/html/HTMLCollection.h"

namespace blink {

class ClassCollection final : public HTMLCollection {
 public:
  // classNames argument is an AtomicString because it is common for Elements to
  // share the same class names.  It is also used to construct a
  // SpaceSplitString (m_classNames) and its constructor requires an
  // AtomicString.
  static ClassCollection* Create(ContainerNode& root_node,
                                 CollectionType type,
                                 const AtomicString& class_names) {
    DCHECK_EQ(type, kClassCollectionType);
    return new ClassCollection(root_node, class_names);
  }

  ~ClassCollection() override;

  bool ElementMatches(const Element&) const;

 private:
  ClassCollection(ContainerNode& root_node, const AtomicString& class_names);

  SpaceSplitString class_names_;
};

DEFINE_TYPE_CASTS(ClassCollection,
                  LiveNodeListBase,
                  collection,
                  collection->GetType() == kClassCollectionType,
                  collection.GetType() == kClassCollectionType);

inline bool ClassCollection::ElementMatches(const Element& test_element) const {
  if (!test_element.HasClass())
    return false;
  if (!class_names_.size())
    return false;
  return test_element.ClassNames().ContainsAll(class_names_);
}

}  // namespace blink

#endif  // ClassCollection_h