grub/kern/term.c
okuji ef0954341c 2005-08-20 Yoshinori K. Okuji <okuji@enbug.org>
* kern/term.c (grub_putchar): Use grub_utf8_to_ucs4 for the
        conversion.
        (grub_getcharwidth): New function.

        * kern/misc.c (grub_utf8_to_ucs4): New function.

        * include/grub/term.h (struct grub_term): Added a new member
        "getcharwidth".
        (grub_getcharwidth): New prototype.

        * include/grub/misc.h (grub_utf8_to_ucs4): New prototype.

        * term/i386/pc/console.c (map_char): New function. Segregated from
        grub_console_putchar.
        (grub_console_putchar): Use map_char.
        (grub_console_getcharwidth): New function.
        (grub_console_term): Specified grub_console_getcharwidth as
        getcharwidth.

        * term/i386/pc/vga.c (grub_vga_getcharwidth): New function.
        (grub_vga_term): Specified grub_vga_getcharwidth as getcharwidth.

        * term/i386/pc/vesafb.c (grub_virtual_screen_setup): Return
        GRUB_ERRNO.
        (grub_vesafb_init): Do not use RC. Instead, use GRUB_ERRNO. Rely
        on grub_strtoul completely.
        (write_char): Declare local variables in the beginning of the
        function.
        (grub_vesafb_getcharwidth): New function.
        (grub_vesafb_term): Specified grub_vesafb_getcharwidth as
        getcharwidth.
2005-08-20 05:26:51 +00:00

260 lines
4.9 KiB
C

/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2002,2003,2005 Free Software Foundation, Inc.
*
* GRUB is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <grub/term.h>
#include <grub/err.h>
#include <grub/mm.h>
#include <grub/misc.h>
/* The list of terminals. */
static grub_term_t grub_term_list;
/* The current terminal. */
static grub_term_t grub_cur_term;
/* The amount of lines counted by the pager. */
static int grub_more_lines;
/* If the more pager is active. */
static int grub_more;
void
grub_term_register (grub_term_t term)
{
term->next = grub_term_list;
grub_term_list = term;
}
void
grub_term_unregister (grub_term_t term)
{
grub_term_t *p, q;
for (p = &grub_term_list, q = *p; q; p = &(q->next), q = q->next)
if (q == term)
{
*p = q->next;
break;
}
}
void
grub_term_iterate (int (*hook) (grub_term_t term))
{
grub_term_t p;
for (p = grub_term_list; p; p = p->next)
if (hook (p))
break;
}
grub_err_t
grub_term_set_current (grub_term_t term)
{
if (grub_cur_term && grub_cur_term->fini)
if ((grub_cur_term->fini) () != GRUB_ERR_NONE)
return grub_errno;
if (term->init)
if ((term->init) () != GRUB_ERR_NONE)
return grub_errno;
grub_cur_term = term;
grub_cls ();
return GRUB_ERR_NONE;
}
grub_term_t
grub_term_get_current (void)
{
return grub_cur_term;
}
/* Put a Unicode character. */
void
grub_putcode (grub_uint32_t code)
{
int height = grub_getwh () & 255;
if (code == '\t' && grub_cur_term->getxy)
{
int n;
n = 8 - ((grub_getxy () >> 8) & 7);
while (n--)
grub_putcode (' ');
return;
}
(grub_cur_term->putchar) (code);
if (code == '\n')
{
grub_putcode ('\r');
grub_more_lines++;
if (grub_more && grub_more_lines == height - 1)
{
char key;
int pos = grub_getxy ();
/* Show --MORE-- on the lower left side of the screen. */
grub_gotoxy (1, height - 1);
grub_setcolorstate (GRUB_TERM_COLOR_HIGHLIGHT);
grub_printf ("--MORE--");
grub_setcolorstate (GRUB_TERM_COLOR_STANDARD);
key = grub_getkey ();
/* Remove the message. */
grub_gotoxy (1, height - 1);
grub_printf (" ");
grub_gotoxy (pos >> 8, pos & 0xFF);
/* Scroll one lines or an entire page, depending on the key. */
if (key == '\r' || key =='\n')
grub_more_lines--;
else
grub_more_lines = 0;
}
}
}
/* Put a character. C is one byte of a UTF-8 stream.
This function gathers bytes until a valid Unicode character is found. */
void
grub_putchar (int c)
{
static grub_size_t size = 0;
static grub_uint8_t buf[6];
grub_uint32_t code;
grub_ssize_t ret;
buf[size++] = c;
ret = grub_utf8_to_ucs4 (&code, buf, size);
if (ret > 0)
{
size = 0;
grub_putcode (code);
}
else if (ret < 0)
{
size = 0;
grub_putcode ('?');
}
}
/* Return the number of columns occupied by the character code CODE. */
grub_ssize_t
grub_getcharwidth (grub_uint32_t code)
{
return (grub_cur_term->getcharwidth) (code);
}
int
grub_getkey (void)
{
return (grub_cur_term->getkey) ();
}
int
grub_checkkey (void)
{
return (grub_cur_term->checkkey) ();
}
grub_uint16_t
grub_getxy (void)
{
return (grub_cur_term->getxy) ();
}
grub_uint16_t
grub_getwh (void)
{
return (grub_cur_term->getwh) ();
}
void
grub_gotoxy (grub_uint8_t x, grub_uint8_t y)
{
(grub_cur_term->gotoxy) (x, y);
}
void
grub_cls (void)
{
if (grub_cur_term->flags & GRUB_TERM_DUMB)
{
grub_putchar ('\n');
grub_refresh ();
}
else
(grub_cur_term->cls) ();
}
void
grub_setcolorstate (grub_term_color_state state)
{
if (grub_cur_term->setcolorstate)
(grub_cur_term->setcolorstate) (state);
}
void
grub_setcolor (grub_uint8_t normal_color, grub_uint8_t highlight_color)
{
if (grub_cur_term->setcolor)
(grub_cur_term->setcolor) (normal_color, highlight_color);
}
int
grub_setcursor (int on)
{
static int prev = 1;
int ret = prev;
if (grub_cur_term->setcursor)
{
(grub_cur_term->setcursor) (on);
prev = on;
}
return ret;
}
void
grub_refresh (void)
{
if (grub_cur_term->refresh)
(grub_cur_term->refresh) ();
}
void
grub_set_more (int onoff)
{
if (onoff == 1)
grub_more++;
else
grub_more--;
grub_more_lines = 0;
}