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#ifndef MOZC_CONVERTER_FOCUS_CANDIDATE_HANDLER_H_
#define MOZC_CONVERTER_FOCUS_CANDIDATE_HANDLER_H_

#include <string>   // for size_t

namespace mozc {

class Segments;

// Converter::FocusSegmentValue() delegates the implementation to
// FocusCandidateHandler. Please see the comment of
// Converter::FocusSegmentValue() when this method is called
class FocusCandidateHandler {
 public:
  // 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.
  static bool FocusSegmentValue(Segments *segments,
                                size_t segment_index,
                                int candidate_index);
 private:
  FocusCandidateHandler() {}
  virtual ~FocusCandidateHandler() {}
};
}  // mozc
#endif  // MOZC_CONVERTER_FOCUS_CANDIDATE_HANDLER_H_