third_party/WebKit/Source/core/layout/LayoutMedia.h

/*
 * Copyright (C) 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 COMPUTER, INC. OR
 * 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 LayoutMedia_h
#define LayoutMedia_h

#include "core/layout/LayoutImage.h"

namespace blink {

class HTMLMediaElement;

class LayoutMedia : public LayoutImage {
 public:
  explicit LayoutMedia(HTMLMediaElement*);
  ~LayoutMedia() override;

  LayoutObject* firstChild() const {
    ASSERT(children() == virtualChildren());
    return children()->firstChild();
  }
  LayoutObject* lastChild() const {
    ASSERT(children() == virtualChildren());
    return children()->lastChild();
  }

  // If you have a LayoutMedia, use firstChild or lastChild instead.
  void slowFirstChild() const = delete;
  void slowLastChild() const = delete;

  const LayoutObjectChildList* children() const { return &m_children; }
  LayoutObjectChildList* children() { return &m_children; }

  HTMLMediaElement* mediaElement() const;

  const char* name() const override { return "LayoutMedia"; }

 protected:
  void layout() override;

  bool isOfType(LayoutObjectType type) const override {
    return type == LayoutObjectMedia || LayoutImage::isOfType(type);
  }

 private:
  LayoutObjectChildList* virtualChildren() final { return children(); }
  const LayoutObjectChildList* virtualChildren() const final {
    return children();
  }

  PaintLayerType layerTypeRequired() const override { return NormalPaintLayer; }

  bool canHaveChildren() const final { return true; }
  bool isChildAllowed(LayoutObject*, const ComputedStyle&) const final;

  bool isImage() const final { return false; }
  void paintReplaced(const PaintInfo&, const LayoutPoint&) const override;

  bool backgroundShouldAlwaysBeClipped() const final { return false; }

  LayoutUnit computePanelWidth(const LayoutRect& mediaWidth) const;

  Optional<LayoutUnit> m_lastReportedPanelWidth;
  LayoutObjectChildList m_children;
};

DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutMedia, isMedia());

}  // namespace blink

#endif  // LayoutMedia_h