ansi_screen.c File Reference

#include <stdio.h>
#include <curses.h>
#include <ipxe/ansicol.h>
#include <ipxe/console.h>

Go to the source code of this file.

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
	FILE_SECBOOT (PERMITTED)
static void	ansiscr_reset (struct _curses_screen *scr) __nonnull
static void	ansiscr_movetoyx (struct _curses_screen *scr, unsigned int y, unsigned int x) __nonnull
static void	ansiscr_putc (struct _curses_screen *scr, chtype c) __nonnull
static void	ansiscr_attrs (struct _curses_screen *scr, attr_t attrs)
static void	ansiscr_init (struct _curses_screen *scr)
static void	ansiscr_exit (struct _curses_screen *scr)
static void	ansiscr_erase (struct _curses_screen *scr, attr_t attrs)
static int	ansiscr_getc (struct _curses_screen *scr __unused)
static bool	ansiscr_peek (struct _curses_screen *scr __unused)
static void	ansiscr_cursor (struct _curses_screen *scr __unused, int visibility)

Variables
static unsigned int	saved_usage
SCREEN	_ansi_screen

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

FILE_SECBOOT()

FILE_SECBOOT

(

PERMITTED

)

References __nonnull, x, and y.

ansiscr_reset()

void ansiscr_reset ( struct _curses_screen * scr )

static

Definition at line 29 of file ansi_screen.c.

                                                         {
        /* Reset terminal attributes and clear screen */
        scr->attrs = 0;
        scr->curs_x = 0;
        scr->curs_y = 0;
        printf ( "\0330m" );
        ansicol_set_pair ( CPAIR_DEFAULT );
        printf ( "\033[2J" );
}

References ansicol_set_pair(), _curses_screen::attrs, CPAIR_DEFAULT, _curses_screen::curs_x, _curses_screen::curs_y, and printf().

Referenced by ansiscr_exit(), and ansiscr_init().

ansiscr_movetoyx()

void ansiscr_movetoyx ( struct _curses_screen * scr, unsigned int y, unsigned int x )

static

Definition at line 54 of file ansi_screen.c.

                                                                {
        if ( ( x != scr->curs_x ) || ( y != scr->curs_y ) ) {
                /* ANSI escape sequence to update cursor position */
                printf ( "\033[%d;%dH", ( y + 1 ), ( x + 1 ) );
                scr->curs_x = x;
                scr->curs_y = y;
        }
}

References _curses_screen::curs_x, _curses_screen::curs_y, printf(), x, and y.

ansiscr_putc()

void ansiscr_putc ( struct _curses_screen * scr, chtype c )

static

Definition at line 64 of file ansi_screen.c.

                                                                  {
        unsigned int character = ( c & A_CHARTEXT );
        attr_t attrs = ( c & ( A_ATTRIBUTES | A_COLOR ) );
 
        /* Update attributes if changed */
        ansiscr_attrs ( scr, attrs );
 
        /* Print the actual character */
        putchar ( character );
 
        /* Update expected cursor position */
        if ( ++(scr->curs_x) == COLS ) {
                scr->curs_x = 0;
                ++scr->curs_y;
        }
}

References A_ATTRIBUTES, A_CHARTEXT, A_COLOR, ansiscr_attrs(), COLS, _curses_screen::curs_x, _curses_screen::curs_y, and putchar().

ansiscr_attrs()

void ansiscr_attrs ( struct _curses_screen * scr, attr_t attrs )

static

Definition at line 16 of file ansi_screen.c.

                                                                       {
        int bold = ( attrs & A_BOLD );
        attr_t cpair = PAIR_NUMBER ( attrs );
 
        if ( scr->attrs != attrs ) {
                scr->attrs = attrs;
                /* Reset attributes and set/clear bold as appropriate */
                printf ( "\033[0;%dm", ( bold ? 1 : 22 ) );
                /* Set foreground and background colours */
                ansicol_set_pair ( cpair );
        }
}

References A_BOLD, ansicol_set_pair(), _curses_screen::attrs, PAIR_NUMBER, and printf().

Referenced by ansiscr_erase(), and ansiscr_putc().

ansiscr_init()

void ansiscr_init ( struct _curses_screen * scr )

static

Definition at line 39 of file ansi_screen.c.

                                                        {
        saved_usage = console_set_usage ( CONSOLE_USAGE_TUI );
        ansiscr_reset ( scr );
}

References ansiscr_reset(), console_set_usage(), CONSOLE_USAGE_TUI, and saved_usage.

ansiscr_exit()

void ansiscr_exit ( struct _curses_screen * scr )

static

Definition at line 44 of file ansi_screen.c.

                                                        {
        ansiscr_reset ( scr );
        console_set_usage ( saved_usage );
}

References ansiscr_reset(), console_set_usage(), and saved_usage.

ansiscr_erase()

void ansiscr_erase ( struct _curses_screen * scr, attr_t attrs )

static

Definition at line 49 of file ansi_screen.c.

                                                                       {
        ansiscr_attrs ( scr, attrs );
        printf ( "\033[2J" );
}

References ansiscr_attrs(), and printf().

ansiscr_getc()

int ansiscr_getc ( struct _curses_screen *scr __unused )

static

Definition at line 81 of file ansi_screen.c.

                                                                {
        return getchar();
}

References __unused, and getchar().

ansiscr_peek()

bool ansiscr_peek ( struct _curses_screen *scr __unused )

static

Definition at line 85 of file ansi_screen.c.

                                                                 {
        return iskey();
}

References __unused, and iskey().

ansiscr_cursor()

void ansiscr_cursor ( struct _curses_screen *scr __unused, int visibility )

static

Definition at line 89 of file ansi_screen.c.

                                              {
        printf ( "\033[?25%c", ( visibility ? 'h' : 'l' ) );
}

References __unused, and printf().

Variable Documentation

saved_usage

unsigned int saved_usage

static

Definition at line 14 of file ansi_screen.c.

Referenced by ansiscr_exit(), ansiscr_init(), dbg_printf(), and log_vprintf().

_ansi_screen

SCREEN _ansi_screen

Initial value:

= {
        .init           = ansiscr_init,
        .exit           = ansiscr_exit,
        .erase          = ansiscr_erase,
        .movetoyx       = ansiscr_movetoyx,
        .putc           = ansiscr_putc,
        .getc           = ansiscr_getc,
        .peek           = ansiscr_peek,
        .cursor         = ansiscr_cursor,
}

Definition at line 94 of file ansi_screen.c.

                      {
        .init           = ansiscr_init,
        .exit           = ansiscr_exit,
        .erase          = ansiscr_erase,
        .movetoyx       = ansiscr_movetoyx,
        .putc           = ansiscr_putc,
        .getc           = ansiscr_getc,
        .peek           = ansiscr_peek,
        .cursor         = ansiscr_cursor,
};