gpxe/src/hci/mucurses/ansi_screen.c

   1 #include <stdio.h>
   2 #include <curses.h>
   3 #include <console.h>
   4
   5 FILE_LICENCE ( GPL2_OR_LATER );
   6
   7 static void ansiscr_reset(struct _curses_screen *scr) __nonnull;
   8 static void ansiscr_movetoyx(struct _curses_screen *scr,
   9                                unsigned int y, unsigned int x) __nonnull;
  10 static void ansiscr_putc(struct _curses_screen *scr, chtype c) __nonnull;
  11
  12 unsigned short _COLS = 80;
  13 unsigned short _LINES = 24;
  14
  15 static void ansiscr_reset ( struct _curses_screen *scr ) {
  16         /* Reset terminal attributes and clear screen */
  17         scr->attrs = 0;
  18         scr->curs_x = 0;
  19         scr->curs_y = 0;
  20         printf ( "\033[0m" );
  21 }
  22
  23 static void ansiscr_movetoyx ( struct _curses_screen *scr,
  24                                unsigned int y, unsigned int x ) {
  25         if ( ( x != scr->curs_x ) || ( y != scr->curs_y ) ) {
  26                 /* ANSI escape sequence to update cursor position */
  27                 printf ( "\033[%d;%dH", ( y + 1 ), ( x + 1 ) );
  28                 scr->curs_x = x;
  29                 scr->curs_y = y;
  30         }
  31 }
  32
  33 static void ansiscr_putc ( struct _curses_screen *scr, chtype c ) {
  34         unsigned int character = ( c & A_CHARTEXT );
  35         attr_t attrs = ( c & ( A_ATTRIBUTES | A_COLOR ) );
  36         int bold = ( attrs & A_BOLD );
  37         attr_t cpair = PAIR_NUMBER ( attrs );
  38         short fcol;
  39         short bcol;
  40
  41         /* Update attributes if changed */
  42         if ( attrs != scr->attrs ) {
  43                 scr->attrs = attrs;
  44                 pair_content ( cpair, &fcol, &bcol );
  45                 /* ANSI escape sequence to update character attributes */
  46                 printf ( "\033[0;%d;3%d;4%dm", ( bold ? 1 : 22 ), fcol, bcol );
  47         }
  48
  49         /* Print the actual character */
  50         putchar ( character );
  51
  52         /* Update expected cursor position */
  53         if ( ++(scr->curs_x) == _COLS ) {
  54                 scr->curs_x = 0;
  55                 ++scr->curs_y;
  56         }
  57 }
  58
  59 static int ansiscr_getc ( struct _curses_screen *scr __unused ) {
  60         return getchar();
  61 }
  62
  63 static bool ansiscr_peek ( struct _curses_screen *scr __unused ) {
  64         return iskey();
  65 }
  66
  67 SCREEN _ansi_screen = {
  68         .init           = ansiscr_reset,
  69         .exit           = ansiscr_reset,
  70         .movetoyx       = ansiscr_movetoyx,
  71         .putc           = ansiscr_putc,
  72         .getc           = ansiscr_getc,
  73         .peek           = ansiscr_peek,
  74 };