103 lines
2.7 KiB
C
103 lines
2.7 KiB
C
#include <stdio.h>
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#include <curses.h>
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#include <ipxe/ansicol.h>
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#include <ipxe/console.h>
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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static void ansiscr_reset(struct _curses_screen *scr) __nonnull;
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static void ansiscr_movetoyx(struct _curses_screen *scr,
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unsigned int y, unsigned int x) __nonnull;
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static void ansiscr_putc(struct _curses_screen *scr, chtype c) __nonnull;
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static unsigned int saved_usage;
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static void ansiscr_attrs ( struct _curses_screen *scr, attr_t attrs ) {
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int bold = ( attrs & A_BOLD );
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attr_t cpair = PAIR_NUMBER ( attrs );
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if ( scr->attrs != attrs ) {
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scr->attrs = attrs;
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/* Reset attributes and set/clear bold as appropriate */
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printf ( "\033[0;%dm", ( bold ? 1 : 22 ) );
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/* Set foreground and background colours */
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ansicol_set_pair ( cpair );
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}
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}
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static void ansiscr_reset ( struct _curses_screen *scr ) {
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/* Reset terminal attributes and clear screen */
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scr->attrs = 0;
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scr->curs_x = 0;
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scr->curs_y = 0;
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printf ( "\0330m" );
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ansicol_set_pair ( CPAIR_DEFAULT );
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printf ( "\033[2J" );
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}
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static void ansiscr_init ( struct _curses_screen *scr ) {
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saved_usage = console_set_usage ( CONSOLE_USAGE_TUI );
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ansiscr_reset ( scr );
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}
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static void ansiscr_exit ( struct _curses_screen *scr ) {
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ansiscr_reset ( scr );
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console_set_usage ( saved_usage );
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}
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static void ansiscr_erase ( struct _curses_screen *scr, attr_t attrs ) {
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ansiscr_attrs ( scr, attrs );
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printf ( "\033[2J" );
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}
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static void ansiscr_movetoyx ( struct _curses_screen *scr,
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unsigned int y, unsigned int x ) {
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if ( ( x != scr->curs_x ) || ( y != scr->curs_y ) ) {
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/* ANSI escape sequence to update cursor position */
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printf ( "\033[%d;%dH", ( y + 1 ), ( x + 1 ) );
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scr->curs_x = x;
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scr->curs_y = y;
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}
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}
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static void ansiscr_putc ( struct _curses_screen *scr, chtype c ) {
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unsigned int character = ( c & A_CHARTEXT );
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attr_t attrs = ( c & ( A_ATTRIBUTES | A_COLOR ) );
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/* Update attributes if changed */
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ansiscr_attrs ( scr, attrs );
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/* Print the actual character */
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putchar ( character );
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/* Update expected cursor position */
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if ( ++(scr->curs_x) == COLS ) {
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scr->curs_x = 0;
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++scr->curs_y;
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}
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}
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static int ansiscr_getc ( struct _curses_screen *scr __unused ) {
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return getchar();
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}
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static bool ansiscr_peek ( struct _curses_screen *scr __unused ) {
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return iskey();
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}
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static void ansiscr_cursor ( struct _curses_screen *scr __unused,
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int visibility ) {
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printf ( "\033[?25%c", ( visibility ? 'h' : 'l' ) );
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}
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SCREEN _ansi_screen = {
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.init = ansiscr_init,
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.exit = ansiscr_exit,
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.erase = ansiscr_erase,
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.movetoyx = ansiscr_movetoyx,
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.putc = ansiscr_putc,
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.getc = ansiscr_getc,
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.peek = ansiscr_peek,
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.cursor = ansiscr_cursor,
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};
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