/*  GNU Ocrad - Optical Character Recognition program
    Copyright (C) 2003-2019 Antonio Diaz Diaz.

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

class Character : public Rectangle
  {
public:
  struct Guess
    {
    int code;
    int value;
    Guess( const int c, const int v ) : code( c ), value( v ) {}
    };

private:
  std::vector< Blob * > blobpv;		// the blobs forming this Character
  std::vector< Guess > gv;		// vector of possible char codes
					// and their associated values.
					// gv[0].code < 0 means further
					// processing is needed (merged chars)

  void recognize110( const Charset & charset, const Rectangle & charbox );
  void recognize111( const Charset & charset, const Rectangle & charbox );
  void recognize112( const Rectangle & charbox );
  void recognize12( const Charset & charset, const Rectangle & charbox );
  void recognize13( const Charset & charset, const Rectangle & charbox );

public:
  explicit Character( Blob * const p )
    : Rectangle( *p ), blobpv( 1, p ) {}

  Character( const Rectangle & re, int code, int value )
    : Rectangle( re ), gv( 1, Guess( code, value ) ) {}

  Character( const Character & c );
  Character & operator=( const Character & c );

  ~Character();

  int area() const;
  const Blob & blob( const int i ) const;
  Blob & blob( const int i );
  int blobs() const { return blobpv.size(); }
  Blob & main_blob();

  void shift_blobp( Blob * const p );

  void add_guess( const int code, const int value )
    { gv.push_back( Guess( code, value ) ); }
  void clear_guesses() { gv.clear(); }
  void insert_guess( const int i, const int code, const int value );
  void delete_guess( const int i );
  void only_guess( const int code, const int value )
    { gv.clear(); gv.push_back( Guess( code, value ) ); }
  bool set_merged_guess( const int code1, const int right1,
                         const int code2, const int blob_index );
  void swap_guesses( const int i, const int j );
  const Guess & guess( const int i ) const;
  int guesses() const { return gv.size(); }
  bool maybe( const int code ) const;
  bool isalnum() const
    { return ( gv.size() > 0 && UCS::isalnum( gv[0].code ) ); }
//  bool maybe_digit() const;
//  bool maybe_letter() const;

  void join( Character & c );
  unsigned char byte_result() const;
  const char * utf8_result() const;
  void print( const Control & control ) const;
  void dprint( const Control & control, const Rectangle & charbox,
               const bool graph, const bool recursive ) const;
  void xprint( const Control & control ) const;

  void recognize1( const Charset & charset, const Rectangle & charbox );
  void apply_filter( const Filter::Type filter );
  void apply_user_filter( const User_filter & user_filter );
  };