third_party/WebKit/Source/core/editing/CaretBase.h

/*
 * Copyright (C) 2004, 2005, 2006, 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
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef CaretBase_h
#define CaretBase_h

#include "core/CoreExport.h"
#include "core/editing/VisiblePosition.h"
#include "platform/geometry/IntRect.h"
#include "platform/geometry/LayoutRect.h"
#include "platform/graphics/paint/DisplayItem.h"
#include "wtf/Noncopyable.h"

namespace blink {

class CullRect;
class DisplayItemClient;
class LocalFrame;
class GraphicsContext;
class LayoutBlock;
class LayoutViewItem;

class CORE_EXPORT CaretBase : public GarbageCollectedFinalized<CaretBase>,
                              public DisplayItemClient {
  WTF_MAKE_NONCOPYABLE(CaretBase);

 public:
  CaretBase();
  virtual ~CaretBase();

  void invalidateCaretRect(Node*);
  void clearCaretRect();
  // Creating VisiblePosition causes synchronous layout so we should use the
  // PositionWithAffinity version if possible.
  // A position in HTMLTextFromControlElement is a typical example.
  void updateCaretRect(const PositionWithAffinity& caretPosition);
  void updateCaretRect(const VisiblePosition& caretPosition);
  IntRect absoluteBoundsForLocalRect(Node*, const LayoutRect&) const;
  bool shouldRepaintCaret(Node&) const;
  bool shouldRepaintCaret(const LayoutViewItem) const;
  void paintCaret(Node*,
                  GraphicsContext&,
                  const LayoutPoint&,
                  DisplayItem::Type) const;

  const LayoutRect& localCaretRectWithoutUpdate() const {
    return m_caretLocalRect;
  }

  static LayoutBlock* caretLayoutObject(Node*);
  void invalidateLocalCaretRect(Node*, const LayoutRect&);

  // DisplayItemClient methods.
  LayoutRect visualRect() const override;
  String debugName() const final;

  DECLARE_VIRTUAL_TRACE();

 private:
  // caret rect in coords local to the layoutObject responsible for painting the
  // caret
  LayoutRect m_caretLocalRect;
  LayoutRect m_visualRect;
};

}  // namespace blink

#endif  // CaretBase_h