Invalidate caret during paint invalidation

third_party/WebKit/Source/core/paint/BlockPaintInvalidator.h

 // Copyright 2016 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 BlockPaintInvalidator_h
 #define BlockPaintInvalidator_h
 
 #include "platform/graphics/PaintInvalidationReason.h"
 #include "wtf/Allocator.h"
 
 namespace blink {
 
 struct PaintInvalidatorContext;
 class LayoutBlock;
+class LayoutRect;
+class LocalFrame;
+class DisplayItemClient;
 
 class BlockPaintInvalidator {
   STACK_ALLOCATED();
 
  public:
   BlockPaintInvalidator(const LayoutBlock& block,
                         const PaintInvalidatorContext& context)
       : m_block(block), m_context(context) {}
 
+  static void blockWillBeDestroyed(const LayoutBlock&);
+
+  // Called before paint invalidation tree walk to ensure that the blocks whose
+  // caret status changed will be reached during the tree walk.
+  static void setMayNeedPaintInvalidationForCaretsIfNeeded(
+      const LocalFrame& localFrameRoot);
+
   PaintInvalidationReason invalidatePaintIfNeeded();
 
+  static void clearPreviousCaretVisualRects(const LayoutBlock&);
+
  private:
+  // Returns new visual rect.
+  LayoutRect invalidateCaretIfNeeded(PaintInvalidationReason,
+                                     const LayoutRect& oldVisualRect,
+                                     const LayoutRect& newLocalRect,
+                                     const DisplayItemClient&);
+  void invalidateCaretsIfNeeded(PaintInvalidationReason);
+
   const LayoutBlock& m_block;
   const PaintInvalidatorContext& m_context;
 };
 
 }  // namespace blink
 
 #endif