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
ansiscr_reset(struct _curses_screen * scr)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
ansiscr_movetoyx(struct _curses_screen * scr,unsigned int y,unsigned int x)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
ansiscr_putc(struct _curses_screen * scr,chtype c)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
ansiscr_getc(struct _curses_screen * scr __unused)59 static int ansiscr_getc ( struct _curses_screen *scr __unused ) {
60 return getchar();
61 }
62
ansiscr_peek(struct _curses_screen * scr __unused)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 };
75