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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2002,2003,2005,2007,2008,2009 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 3 of the License, or
* (at your option) any later version.
*
* GRUB 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, see <http://www.gnu.org/licenses/>.
*/
#include <grub/term.h>
#include <grub/err.h>
#include <grub/mm.h>
#include <grub/misc.h>
#include <grub/env.h>
#include <grub/time.h>
struct grub_term_output *grub_term_outputs_disabled;
struct grub_term_input *grub_term_inputs_disabled;
struct grub_term_output *grub_term_outputs;
struct grub_term_input *grub_term_inputs;
/* Current color state. */
grub_uint8_t grub_term_normal_color = GRUB_TERM_DEFAULT_NORMAL_COLOR;
grub_uint8_t grub_term_highlight_color = GRUB_TERM_DEFAULT_HIGHLIGHT_COLOR;
void (*grub_term_poll_usb) (int wait_for_completion) = NULL;
void (*grub_net_poll_cards_idle) (void) = NULL;
/* Put a Unicode character. */
static void
grub_putcode_dumb (grub_uint32_t code,
struct grub_term_output *term)
{
struct grub_unicode_glyph c =
{
.base = code,
.variant = 0,
.attributes = 0,
.ncomb = 0,
.estimated_width = 1
};
if (code == '\t' && term->getxy)
{
int n;
n = GRUB_TERM_TAB_WIDTH - ((term->getxy (term).x)
% GRUB_TERM_TAB_WIDTH);
while (n--)
grub_putcode_dumb (' ', term);
return;
}
(term->putchar) (term, &c);
if (code == '\n')
grub_putcode_dumb ('\r', term);
}
static void
grub_xputs_dumb (const char *str)
{
for (; *str; str++)
{
grub_term_output_t term;
grub_uint32_t code = *str;
if (code > 0x7f)
code = '?';
FOR_ACTIVE_TERM_OUTPUTS(term)
grub_putcode_dumb (code, term);
}
}
void (*grub_xputs) (const char *str) = grub_xputs_dumb;
int
grub_getkey_noblock (void)
{
grub_term_input_t term;
if (grub_term_poll_usb)
grub_term_poll_usb (0);
if (grub_net_poll_cards_idle)
grub_net_poll_cards_idle ();
FOR_ACTIVE_TERM_INPUTS(term)
{
int key = term->getkey (term);
if (key != GRUB_TERM_NO_KEY)
return key;
}
return GRUB_TERM_NO_KEY;
}
int
grub_getkey (void)
{
int ret;
grub_refresh ();
while (1)
{
ret = grub_getkey_noblock ();
if (ret != GRUB_TERM_NO_KEY)
return ret;
grub_cpu_idle ();
}
}
int
grub_getkeystatus (void)
{
int status = 0;
grub_term_input_t term;
if (grub_term_poll_usb)
grub_term_poll_usb (0);
FOR_ACTIVE_TERM_INPUTS(term)
{
if (term->getkeystatus)
status |= term->getkeystatus (term);
}
return status;
}
int
grub_key_is_interrupt (int key)
{
/*
* ESC sometimes is the BIOS setup hotkey and may be hard to discover, also
* check F4, which was chosen because is not used as a hotkey to enter the
* BIOS setup by any vendor.
*/
if (key == GRUB_TERM_ESC || key == GRUB_TERM_KEY_F4)
return 1;
/*
* Pressing keys at the right time during boot is hard to time, also allow
* interrupting sleeps / the menu countdown by keeping shift pressed.
*/
if (grub_getkeystatus() & (GRUB_TERM_STATUS_LSHIFT | GRUB_TERM_STATUS_RSHIFT))
return 1;
return 0;
}
void
grub_refresh (void)
{
struct grub_term_output *term;
FOR_ACTIVE_TERM_OUTPUTS(term)
grub_term_refresh (term);
}
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