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

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef FixedPositionContainerDisplayItem_h
   6 #define FixedPositionContainerDisplayItem_h
   7
   8 #include "platform/geometry/LayoutSize.h"
   9 #include "platform/graphics/paint/DisplayItem.h"
  10 #include "wtf/PassOwnPtr.h"
  11
  12 namespace blink {
  13
  14 class PLATFORM_EXPORT BeginFixedPositionContainerDisplayItem final : public PairedBeginDisplayItem {
  15 public:
  16     BeginFixedPositionContainerDisplayItem(const DisplayItemClientWrapper& client)
  17         : PairedBeginDisplayItem(client, BeginFixedPositionContainer, sizeof(*this)) { }
  18
  19     void replay(GraphicsContext&) final { }
  20     void appendToWebDisplayItemList(WebDisplayItemList*) const final;
  21 };
  22
  23 class PLATFORM_EXPORT EndFixedPositionContainerDisplayItem final : public PairedEndDisplayItem {
  24 public:
  25     EndFixedPositionContainerDisplayItem(const DisplayItemClientWrapper& client)
  26         : PairedEndDisplayItem(client, EndFixedPositionContainer, sizeof(*this)) { }
  27
  28     void replay(GraphicsContext&) final { }
  29     void appendToWebDisplayItemList(WebDisplayItemList*) const final;
  30
  31 private:
  32 #if ENABLE(ASSERT)
  33     bool isEndAndPairedWith(DisplayItem::Type otherType) const final { return otherType == BeginFixedPositionContainer; }
  34 #endif
  35 };
  36
  37 } // namespace blink
  38
  39 #endif // FixedPositionContainerDisplayItem_h