third_party/WebKit/Source/platform/graphics/paint/ClipDisplayItem.h

// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef ClipDisplayItem_h
#define ClipDisplayItem_h

#include "SkRegion.h"
#include "platform/PlatformExport.h"
#include "platform/geometry/FloatRoundedRect.h"
#include "platform/geometry/IntRect.h"
#include "platform/graphics/paint/DisplayItem.h"
#include "wtf/Vector.h"

namespace blink {

class PLATFORM_EXPORT ClipDisplayItem final : public PairedBeginDisplayItem {
 public:
  ClipDisplayItem(const DisplayItemClient& client,
                  Type type,
                  const IntRect& clipRect)
      : PairedBeginDisplayItem(client, type, sizeof(*this)),
        m_clipRect(clipRect) {
    ASSERT(isClipType(type));
  }

  ClipDisplayItem(const DisplayItemClient& client,
                  Type type,
                  const IntRect& clipRect,
                  Vector<FloatRoundedRect>& roundedRectClips)
      : ClipDisplayItem(client, type, clipRect) {
    m_roundedRectClips.swap(roundedRectClips);
  }

  void replay(GraphicsContext&) const override;
  void appendToWebDisplayItemList(const IntRect&,
                                  WebDisplayItemList*) const override;

 private:
#ifndef NDEBUG
  void dumpPropertiesAsDebugString(WTF::StringBuilder&) const override;
#endif
  bool equals(const DisplayItem& other) const final {
    return DisplayItem::equals(other) &&
           m_clipRect ==
               static_cast<const ClipDisplayItem&>(other).m_clipRect &&
           m_roundedRectClips ==
               static_cast<const ClipDisplayItem&>(other).m_roundedRectClips;
  }

  const IntRect m_clipRect;
  Vector<FloatRoundedRect> m_roundedRectClips;
};

class PLATFORM_EXPORT EndClipDisplayItem final : public PairedEndDisplayItem {
 public:
  EndClipDisplayItem(const DisplayItemClient& client, Type type)
      : PairedEndDisplayItem(client, type, sizeof(*this)) {
    ASSERT(isEndClipType(type));
  }

  void replay(GraphicsContext&) const override;
  void appendToWebDisplayItemList(const IntRect&,
                                  WebDisplayItemList*) const override;

 private:
#if DCHECK_IS_ON()
  bool isEndAndPairedWith(DisplayItem::Type otherType) const final {
    return DisplayItem::isClipType(otherType);
  }
#endif
};

}  // namespace blink

#endif  // ClipDisplayItem_h