gpxe/src/hci/mucurses/ansi_screen.c

   1 #include <stdio.h>
   2 #include <curses.h>
   3 #include <console.h>
   4
   5 static void ansiscr_reset(struct _curses_screen *scr) __nonnull;
   6 static void ansiscr_movetoyx(struct _curses_screen *scr,
   7                                unsigned int y, unsigned int x) __nonnull;
   8 static void ansiscr_putc(struct _curses_screen *scr, chtype c) __nonnull;
   9
  10 unsigned short _COLS = 80;
  11 unsigned short _LINES = 24;
  12
  13 static void ansiscr_reset ( struct _curses_screen *scr ) {
  14         /* Reset terminal attributes and clear screen */
  15         scr->attrs = 0;
  16         scr->curs_x = 0;
  17         scr->curs_y = 0;
  18         printf ( "\033[0m\033[2J\033[1;1H" );
  19 }
  20
  21 static void ansiscr_movetoyx ( struct _curses_screen *scr,
  22                                unsigned int y, unsigned int x ) {
  23         if ( ( x != scr->curs_x ) || ( y != scr->curs_y ) ) {
  24                 /* ANSI escape sequence to update cursor position */
  25                 printf ( "\033[%d;%dH", ( y + 1 ), ( x + 1 ) );
  26                 scr->curs_x = x;
  27                 scr->curs_y = y;
  28         }
  29 }
  30
  31 static void ansiscr_putc ( struct _curses_screen *scr, chtype c ) {
  32         unsigned int character = ( c & A_CHARTEXT );
  33         attr_t attrs = ( c & ( A_ATTRIBUTES | A_COLOR ) );
  34         int bold = ( attrs & A_BOLD );
  35         attr_t cpair = PAIR_NUMBER ( attrs );
  36         short fcol;
  37         short bcol;
  38
  39         /* Update attributes if changed */
  40         if ( attrs != scr->attrs ) {
  41                 scr->attrs = attrs;
  42                 pair_content ( cpair, &fcol, &bcol );
  43                 /* ANSI escape sequence to update character attributes */
  44                 printf ( "\033[0;%d;3%d;4%dm", ( bold ? 1 : 22 ), fcol, bcol );
  45         }
  46
  47         /* Print the actual character */
  48         putchar ( character );
  49
  50         /* Update expected cursor position */
  51         if ( ++(scr->curs_x) == _COLS ) {
  52                 scr->curs_x = 0;
  53                 ++scr->curs_y;
  54         }
  55 }
  56
  57 static int ansiscr_getc ( struct _curses_screen *scr __unused ) {
  58         return getchar();
  59 }
  60
  61 static bool ansiscr_peek ( struct _curses_screen *scr __unused ) {
  62         return iskey();
  63 }
  64
  65 SCREEN _ansi_screen = {
  66         .init           = ansiscr_reset,
  67         .exit           = ansiscr_reset,
  68         .movetoyx       = ansiscr_movetoyx,
  69         .putc           = ansiscr_putc,
  70         .getc           = ansiscr_getc,
  71         .peek           = ansiscr_peek,
  72 };