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

   1 /*
   2  * Copyright (C) 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef LayoutMedia_h
  27 #define LayoutMedia_h
  28
  29 #include "core/layout/LayoutImage.h"
  30
  31 namespace blink {
  32
  33 class HTMLMediaElement;
  34
  35 class LayoutMedia : public LayoutImage {
  36 public:
  37     explicit LayoutMedia(HTMLMediaElement*);
  38     ~LayoutMedia() override;
  39
  40     LayoutObject* firstChild() const { ASSERT(children() == virtualChildren()); return children()->firstChild(); }
  41     LayoutObject* lastChild() const { ASSERT(children() == virtualChildren()); return children()->lastChild(); }
  42
  43     // If you have a LayoutMedia, use firstChild or lastChild instead.
  44     void slowFirstChild() const = delete;
  45     void slowLastChild() const = delete;
  46
  47     const LayoutObjectChildList* children() const { return &m_children; }
  48     LayoutObjectChildList* children() { return &m_children; }
  49
  50     HTMLMediaElement* mediaElement() const;
  51
  52     const char* name() const override { return "LayoutMedia"; }
  53
  54 protected:
  55     void layout() override;
  56
  57     bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectMedia || LayoutImage::isOfType(type); }
  58
  59 private:
  60     LayoutObjectChildList* virtualChildren() final { return children(); }
  61     const LayoutObjectChildList* virtualChildren() const final { return children(); }
  62
  63     DeprecatedPaintLayerType layerTypeRequired() const override { return NormalDeprecatedPaintLayer; }
  64
  65     bool canHaveChildren() const final { return true; }
  66     bool isChildAllowed(LayoutObject*, const ComputedStyle&) const final;
  67
  68     bool isImage() const final { return false; }
  69     void paintReplaced(const PaintInfo&, const LayoutPoint&) override;
  70
  71     bool backgroundShouldAlwaysBeClipped() const final { return false; }
  72
  73     LayoutObjectChildList m_children;
  74 };
  75
  76 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutMedia, isMedia());
  77
  78 } // namespace blink
  79
  80 #endif // LayoutMedia_h