1
0
mirror of https://github.com/rfivet/uemacs.git synced 2024-12-25 02:26:22 -05:00
uemacs/terminal.h

83 lines
3.4 KiB
C

/* terminal.h -- */
#ifndef __TERMINAL_H__
#define __TERMINAL_H__
#include "defines.h" /* COLOR, SCROLLCODE */
#include "retcode.h"
#include "utf8.h"
/* The editor communicates with the display using a high level interface.
A "TERM" structure holds useful variables, and indirect pointers to
routines that do useful operations. The low level get and put routines
are here too. This lets a terminal, in addition to having non standard
commands, have funny get and put character code too. The calls might
get changed to "termp->t_field" style in the future, to make it possible
to run more than one terminal type.
*/
typedef struct {
const short t_maxrow ; /* max number of rows allowable */
const short t_maxcol ; /* max number of columns allowable */
short t_mrow ; /* max number of rows displayable */
short t_nrow ; /* current number of rows displayed */
short t_mcol ; /* max number of rows displayable */
short t_ncol ; /* current number of columns displayed */
short t_margin ; /* min margin for extended lines */
short t_scrsiz ; /* size of scroll region */
int t_pause ; /* # times thru update to pause */
void (*t_open)( void) ; /* Open terminal at the start */
void (*t_close)( void) ; /* Close terminal at end. */
void (*t_kopen)( void) ; /* Open keyboard */
void (*t_kclose)( void) ; /* close keyboard */
int (*t_getchar)( void) ; /* Get character from keyboard */
int (*t_putchar)( unicode_t) ; /* Put character to display */
void (*t_flush) (void) ; /* Flush output buffers */
void (*t_move)( int, int) ; /* Move the cursor, origin 0 */
void (*t_eeol)( void) ; /* Erase to end of line */
void (*t_eeop)( void) ; /* Erase to end of page */
void (*t_beep)( void) ; /* Beep */
void (*t_rev)( int) ; /* set reverse video state */
int (*t_rez)( char *) ; /* change screen resolution */
#if COLOR
int (*t_setfor)() ; /* set forground color */
int (*t_setback)() ; /* set background color */
#endif
#if SCROLLCODE
void (*t_scroll)( int, int,int) ; /* scroll a region of the screen */
#endif
} terminal_t ;
/* TEMPORARY macros for terminal I/O (to be placed in a machine dependant
place later)
*/
#define TTopen (*term.t_open)
#define TTclose (*term.t_close)
#define TTkopen (*term.t_kopen)
#define TTkclose (*term.t_kclose)
#define TTgetc (*term.t_getchar)
#define TTputc (*term.t_putchar)
#define TTflush (*term.t_flush)
#define TTmove (*term.t_move)
#define TTeeol (*term.t_eeol)
#define TTeeop (*term.t_eeop)
#define TTbeep (*term.t_beep)
#define TTrev (*term.t_rev)
#define TTrez (*term.t_rez)
#if COLOR
#define TTforg (*term.t_setfor)
#define TTbacg (*term.t_setback)
#endif
/* Terminal table defined only in tcap.c */
extern terminal_t term ;
extern boolean eolexist ; /* does clear to EOL exist? */
extern boolean revexist ; /* does reverse video exist? */
extern boolean sgarbf ; /* State of screen unknown */
extern char sres[] ; /* Current screen resolution. */
/* NORMAL, CGA, EGA, VGA */
#endif
/* end of terminal.h */