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#ifndef MOZC_REWRITER_FOCUS_CANDIDATE_REWRITER_H_
#define MOZC_REWRITER_FOCUS_CANDIDATE_REWRITER_H_

#include "rewriter/rewriter_interface.h"

namespace mozc {

class ConversionRequest;
class Segments;

class FocusCandidateRewriter : public RewriterInterface  {
 public:
  FocusCandidateRewriter();
  virtual ~FocusCandidateRewriter();

  // Changed the focus of "segment_index"-th segment to be "candidate_index".
  // The segments will be written according to pre-defined "actions".
  // Currently, FocusSegmentValue() finds bracket/parentheses matching, e.g,
  // When user chooses "(" in some candidate, corresponding close bracket ")"
  // is automatically placed at the top.
  bool Focus(Segments *segments,
             size_t segment_index,
             int candidate_index) const;

  virtual bool Rewrite(const ConversionRequest &request,
                       Segments *segments) const {
    return false;
  }
};

}  // namespace mozc
#endif  // MOZC_REWRITER_FOCUS_CANDIDATE_REWRITER_H_