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#ifndef NVIM_UNDO_DEFS_H
#define NVIM_UNDO_DEFS_H
#include <time.h> // for time_t
#include "nvim/extmark_defs.h"
#include "nvim/mark_defs.h"
#include "nvim/pos.h"
typedef struct u_header u_header_T;
// Structure to store info about the Visual area.
typedef struct {
pos_T vi_start; // start pos of last VIsual
pos_T vi_end; // end position of last VIsual
int vi_mode; // VIsual_mode of last VIsual
colnr_T vi_curswant; // MAXCOL from w_curswant
} visualinfo_T;
#include "nvim/buffer_defs.h"
typedef struct u_entry u_entry_T;
struct u_entry {
u_entry_T *ue_next; // pointer to next entry in list
linenr_T ue_top; // number of line above undo block
linenr_T ue_bot; // number of line below undo block
linenr_T ue_lcount; // linecount when u_save called
char **ue_array; // array of lines in undo block
long ue_size; // number of lines in ue_array
#ifdef U_DEBUG
int ue_magic; // magic number to check allocation
#endif
};
struct u_header {
// The following have a pointer and a number. The number is used when reading
// the undo file in u_read_undo()
union {
u_header_T *ptr; // pointer to next undo header in list
long seq;
} uh_next;
union {
u_header_T *ptr; // pointer to previous header in list
long seq;
} uh_prev;
union {
u_header_T *ptr; // pointer to next header for alt. redo
long seq;
} uh_alt_next;
union {
u_header_T *ptr; // pointer to previous header for alt. redo
long seq;
} uh_alt_prev;
long uh_seq; // sequence number, higher == newer undo
int uh_walk; // used by undo_time()
u_entry_T *uh_entry; // pointer to first entry
u_entry_T *uh_getbot_entry; // pointer to where ue_bot must be set
pos_T uh_cursor; // cursor position before saving
long uh_cursor_vcol;
int uh_flags; // see below
fmark_T uh_namedm[NMARKS]; // marks before undo/after redo
extmark_undo_vec_t uh_extmark; // info to move extmarks
visualinfo_T uh_visual; // Visual areas before undo/after redo
time_t uh_time; // timestamp when the change was made
long uh_save_nr; // set when the file was saved after the
// changes in this block
#ifdef U_DEBUG
int uh_magic; // magic number to check allocation
#endif
};
// values for uh_flags
#define UH_CHANGED 0x01 // b_changed flag before undo/after redo
#define UH_EMPTYBUF 0x02 // buffer was empty
#define UH_RELOAD 0x04 // buffer was reloaded
#endif // NVIM_UNDO_DEFS_H
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