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#ifndef MOZC_REWRITER_COMMAND_REWRITER_H_
#define MOZC_REWRITER_COMMAND_REWRITER_H_

#include "protocol/config.pb.h"
#include "rewriter/rewriter_interface.h"

namespace mozc {

class ConversionRequest;
class Segments;
class Segment;

// CommandRewriter is a Rewriter which inserts
// "Command candidates" with which user can change the configurations
// of Suggestions and/or Incogito mode.
class CommandRewriter : public RewriterInterface  {
 public:
  CommandRewriter();
  virtual ~CommandRewriter();

  virtual bool Rewrite(const ConversionRequest &request,
                       Segments *segments) const;

 private:
  bool RewriteSegment(const config::Config &config, Segment *segment) const;

  // Insert a new IncogitoModeToggle Command candidate.
  // Use segment->candidate(base_pos) as a reference candidate.
  // |insert_pos| is the actual position where the new candidate
  // is inserted.
  void InsertIncognitoModeToggleCommand(const config::Config &config,
                                        Segment *segment,
                                        size_t reference_pos,
                                        size_t insert_pos) const;

  // Insert a new IncogitoModeToggle Command candidate.
  // Use segment->candidate(base_pos) as a reference candidate.
  // |insert_pos| is the actual position where the new candidate
  // is inserted.
  void InsertDisableAllSuggestionToggleCommand(const config::Config &config,
                                               Segment *segment,
                                               size_t reference_pos,
                                               size_t insert_pos) const;
};

}  // namespace mozc
#endif  // MOZC_REWRITER_COMMAND_REWRITER_H_