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