source: tags/initial/EDIT4/ed4_edit_string.hxx

struct ED4_work_info;

//#define ALIGN_STRING ".-~?"   // characters allowed to change in align_mod
//#define ADPP_IS_ALIGN_CHARACTER(chr) (strchr (ALIGN_STRING,chr))
#define ADPP_IS_ALIGN_CHARACTER(chr) (ED4_is_align_character[chr]!=0)

extern unsigned char ED4_is_align_character[255];
void ED4_init_is_align_character(GB_CSTR gap_chars);

const char SEQ_POINT = '.';

class ED4_remap;

class ED4_Edit_String {
    GBDATA      *gbd;
    char        *seq;
    long        seq_len;
    ED4_remap   *remap;
    static int  nrepeat;
    static int  nrepeat_is_already_set;
    static int  nrepeat_zero_requested;
    
    int legal_curpos(long pos) const            { return pos>=0 && pos<=seq_len; }
    int legal_seqpos(long pos) const            { return pos>=0 && pos<seq_len; }
    
    ED4_ERROR *moveBase(long source_position, long dest_position, unsigned char gap_to_use); // moves a base from source_position to dest_position
    
    ED4_ERROR *shiftBases(long source_pos, long source_endpos, long dest_position,
                          int direction, long *dest_endpos, unsigned char gap_to_use); // shifts a line of bases from source_position to dest_position

    long        get_next_base(long seq_position, int direction);
    long        get_next_gap(long seq_position, int direction);
    
    long        get_next_visible_base(long position, int direction);
    long        get_next_visible_gap(long position, int direction);
    long        get_next_visible_pos(long position, int direction);

    ED4_ERROR   *insert(char *,long position, int direction, int removeAtNextGap);
    ED4_ERROR   *remove(int len,long position, int direction, int insertAtNextGap);
    ED4_ERROR   *replace(char *text,long position, int direction);
    ED4_ERROR   *swap_gaps(long position, char ch);
    ED4_ERROR   *command( AW_key_mod keymod, AW_key_code keycode, char key, int direction, ED4_EDITMODI mode, bool is_consensus,
                          long &cursorpos, bool& changed_flag, bool& center_cursor, bool& cannot_handle, bool& write_fault, GBDATA *gb_data, bool is_sequence);
    unsigned char get_gap_type(long pos, int direction);

public:
    char *old_seq;
    long old_seq_len;

    ED4_Edit_String();
    void init_edit();
    void edit(ED4_work_info *info);
    void finish_edit();
    ~ED4_Edit_String();
    
    int use_nrepeat() { // external functions use this to get and use nrepeat 
        int nrep = nrepeat==0 ? 1 : nrepeat;
        nrepeat = 0;
        return nrep;
    }
};