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grub/normal/menu_text.c

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/* menu_text.c - Basic text menu implementation. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2003,2004,2005,2006,2007,2008,2009 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/normal.h>
#include <grub/term.h>
#include <grub/misc.h>
#include <grub/loader.h>
#include <grub/mm.h>
#include <grub/time.h>
#include <grub/env.h>
#include <grub/menu_viewer.h>
#include <grub/i18n.h>
#include <grub/charset.h>
static grub_uint8_t grub_color_menu_normal;
static grub_uint8_t grub_color_menu_highlight;
struct menu_viewer_data
{
int first, offset;
grub_menu_t menu;
struct grub_term_output *term;
};
static void
print_spaces (int number_spaces, struct grub_term_output *term)
{
int i;
for (i = 0; i < number_spaces; i++)
grub_putcode (' ', term);
}
void
grub_print_ucs4 (const grub_uint32_t * str,
const grub_uint32_t * last_position,
struct grub_term_output *term)
{
while (str < last_position)
{
grub_putcode (*str, term);
str++;
}
}
grub_ssize_t
grub_getstringwidth (grub_uint32_t * str, const grub_uint32_t * last_position,
struct grub_term_output *term)
{
grub_ssize_t width = 0;
while (str < last_position)
{
width += grub_term_getcharwidth (term, *str);
str++;
}
return width;
}
void
grub_print_message_indented (const char *msg, int margin_left, int margin_right,
struct grub_term_output *term)
{
int line_len;
grub_uint32_t *unicode_msg;
grub_uint32_t *last_position;
int msg_len;
line_len = grub_term_width (term) - grub_term_getcharwidth (term, 'm') *
(margin_left + margin_right);
msg_len = grub_utf8_to_ucs4_alloc (msg, &unicode_msg, &last_position);
if (msg_len < 0)
{
return;
}
grub_uint32_t *current_position = unicode_msg;
grub_uint32_t *next_new_line = unicode_msg;
int first_loop = 1;
while (current_position < last_position)
{
if (! first_loop)
grub_putcode ('\n', term);
next_new_line = (grub_uint32_t *) last_position;
while (grub_getstringwidth (current_position, next_new_line,term)
> line_len
|| (next_new_line != last_position && *next_new_line != ' '
&& next_new_line > current_position))
{
next_new_line--;
}
if (next_new_line == current_position)
{
next_new_line = (next_new_line + line_len > last_position) ?
(grub_uint32_t *) last_position : next_new_line + line_len;
}
print_spaces (margin_left, term);
grub_print_ucs4 (current_position, next_new_line, term);
next_new_line++;
current_position = next_new_line;
first_loop = 0;
}
grub_free (unicode_msg);
}
static void
draw_border (struct grub_term_output *term)
{
unsigned i;
grub_term_setcolorstate (term, GRUB_TERM_COLOR_NORMAL);
grub_term_gotoxy (term, GRUB_TERM_MARGIN, GRUB_TERM_TOP_BORDER_Y);
grub_putcode (GRUB_TERM_DISP_UL, term);
for (i = 0; i < (unsigned) grub_term_border_width (term) - 2; i++)
grub_putcode (GRUB_TERM_DISP_HLINE, term);
grub_putcode (GRUB_TERM_DISP_UR, term);
for (i = 0; i < (unsigned) grub_term_num_entries (term); i++)
{
grub_term_gotoxy (term, GRUB_TERM_MARGIN, GRUB_TERM_TOP_BORDER_Y + i + 1);
grub_putcode (GRUB_TERM_DISP_VLINE, term);
grub_term_gotoxy (term, GRUB_TERM_MARGIN + grub_term_border_width (term)
- 1,
GRUB_TERM_TOP_BORDER_Y + i + 1);
grub_putcode (GRUB_TERM_DISP_VLINE, term);
}
grub_term_gotoxy (term, GRUB_TERM_MARGIN,
GRUB_TERM_TOP_BORDER_Y + grub_term_num_entries (term) + 1);
grub_putcode (GRUB_TERM_DISP_LL, term);
for (i = 0; i < (unsigned) grub_term_border_width (term) - 2; i++)
grub_putcode (GRUB_TERM_DISP_HLINE, term);
grub_putcode (GRUB_TERM_DISP_LR, term);
grub_term_setcolorstate (term, GRUB_TERM_COLOR_NORMAL);
grub_term_gotoxy (term, GRUB_TERM_MARGIN,
(GRUB_TERM_TOP_BORDER_Y + grub_term_num_entries (term)
+ GRUB_TERM_MARGIN + 1));
}
static void
print_message (int nested, int edit, struct grub_term_output *term)
{
grub_term_setcolorstate (term, GRUB_TERM_COLOR_NORMAL);
if (edit)
{
grub_putcode ('\n', term);
#ifdef GRUB_MACHINE_EFI
grub_print_message_indented (_("Minimum Emacs-like screen editing is \
supported. TAB lists completions. Press F1 to boot, F2=Ctrl-a, F3=Ctrl-e, \
F4 for a command-line or ESC to discard edits and return to the GRUB menu."),
STANDARD_MARGIN, STANDARD_MARGIN, term);
#else
grub_print_message_indented (_("Minimum Emacs-like screen editing is \
supported. TAB lists completions. Press Ctrl-x to boot, Ctrl-c for a \
command-line or ESC to discard edits and return to the GRUB menu."),
STANDARD_MARGIN, STANDARD_MARGIN, term);
#endif
}
else
{
const char *msg = _("Use the %C and %C keys to select which "
"entry is highlighted.\n");
char *msg_translated;
msg_translated = grub_xasprintf (msg, (grub_uint32_t) GRUB_TERM_DISP_UP,
(grub_uint32_t) GRUB_TERM_DISP_DOWN);
if (!msg_translated)
return;
grub_putchar ('\n');
grub_print_message_indented (msg_translated, STANDARD_MARGIN,
STANDARD_MARGIN, term);
grub_free (msg_translated);
if (nested)
{
grub_print_message_indented
(_("Press enter to boot the selected OS, "
"\'e\' to edit the commands before booting "
"or \'c\' for a command-line. ESC to return previous menu.\n"),
STANDARD_MARGIN, STANDARD_MARGIN, term);
}
else
{
grub_print_message_indented
(_("Press enter to boot the selected OS, "
"\'e\' to edit the commands before booting "
"or \'c\' for a command-line.\n"),
STANDARD_MARGIN, STANDARD_MARGIN, term);
}
}
}
static void
print_entry (int y, int highlight, grub_menu_entry_t entry,
struct grub_term_output *term)
{
int x;
const char *title;
grub_size_t title_len;
grub_ssize_t len;
grub_uint32_t *unicode_title;
grub_ssize_t i;
grub_uint8_t old_color_normal, old_color_highlight;
title = entry ? entry->title : "";
title_len = grub_strlen (title);
unicode_title = grub_malloc (title_len * sizeof (*unicode_title));
if (! unicode_title)
/* XXX How to show this error? */
return;
len = grub_utf8_to_ucs4 (unicode_title, title_len,
(grub_uint8_t *) title, -1, 0);
if (len < 0)
{
/* It is an invalid sequence. */
grub_free (unicode_title);
return;
}
grub_term_getcolor (term, &old_color_normal, &old_color_highlight);
grub_term_setcolor (term, grub_color_menu_normal, grub_color_menu_highlight);
grub_term_setcolorstate (term, highlight
? GRUB_TERM_COLOR_HIGHLIGHT
: GRUB_TERM_COLOR_NORMAL);
grub_term_gotoxy (term, GRUB_TERM_LEFT_BORDER_X + GRUB_TERM_MARGIN, y);
for (x = GRUB_TERM_LEFT_BORDER_X + GRUB_TERM_MARGIN + 1, i = 0;
x < (int) (GRUB_TERM_LEFT_BORDER_X + grub_term_border_width (term)
- GRUB_TERM_MARGIN);
i++)
{
if (i < len
&& x <= (int) (GRUB_TERM_LEFT_BORDER_X + grub_term_border_width (term)
- GRUB_TERM_MARGIN - 1))
{
grub_ssize_t width;
width = grub_term_getcharwidth (term, unicode_title[i]);
if (x + width > (int) (GRUB_TERM_LEFT_BORDER_X
+ grub_term_border_width (term)
- GRUB_TERM_MARGIN - 1))
grub_putcode (GRUB_TERM_DISP_RIGHT, term);
else
grub_putcode (unicode_title[i], term);
x += width;
}
else
{
grub_putcode (' ', term);
x++;
}
}
grub_term_setcolorstate (term, GRUB_TERM_COLOR_NORMAL);
grub_putcode (' ', term);
grub_term_gotoxy (term, grub_term_cursor_x (term), y);
grub_term_setcolor (term, old_color_normal, old_color_highlight);
grub_term_setcolorstate (term, GRUB_TERM_COLOR_NORMAL);
grub_free (unicode_title);
}
static void
print_entries (grub_menu_t menu, int first, int offset,
struct grub_term_output *term)
{
grub_menu_entry_t e;
int i;
grub_term_gotoxy (term,
GRUB_TERM_LEFT_BORDER_X + grub_term_border_width (term),
GRUB_TERM_FIRST_ENTRY_Y);
if (first)
grub_putcode (GRUB_TERM_DISP_UP, term);
else
grub_putcode (' ', term);
e = grub_menu_get_entry (menu, first);
for (i = 0; i < grub_term_num_entries (term); i++)
{
print_entry (GRUB_TERM_FIRST_ENTRY_Y + i, offset == i, e, term);
if (e)
e = e->next;
}
grub_term_gotoxy (term, GRUB_TERM_LEFT_BORDER_X
+ grub_term_border_width (term),
GRUB_TERM_TOP_BORDER_Y + grub_term_num_entries (term));
if (e)
grub_putcode (GRUB_TERM_DISP_DOWN, term);
else
grub_putcode (' ', term);
grub_term_gotoxy (term, grub_term_cursor_x (term),
GRUB_TERM_FIRST_ENTRY_Y + offset);
}
/* Initialize the screen. If NESTED is non-zero, assume that this menu
is run from another menu or a command-line. If EDIT is non-zero, show
a message for the menu entry editor. */
void
grub_menu_init_page (int nested, int edit,
struct grub_term_output *term)
{
grub_uint8_t old_color_normal, old_color_highlight;
grub_term_getcolor (term, &old_color_normal, &old_color_highlight);
/* By default, use the same colors for the menu. */
grub_color_menu_normal = old_color_normal;
grub_color_menu_highlight = old_color_highlight;
/* Then give user a chance to replace them. */
grub_parse_color_name_pair (&grub_color_menu_normal,
grub_env_get ("menu_color_normal"));
grub_parse_color_name_pair (&grub_color_menu_highlight,
grub_env_get ("menu_color_highlight"));
grub_normal_init_page (term);
grub_term_setcolor (term, grub_color_menu_normal, grub_color_menu_highlight);
draw_border (term);
grub_term_setcolor (term, old_color_normal, old_color_highlight);
print_message (nested, edit, term);
}
static void
menu_text_print_timeout (int timeout, void *dataptr)
{
const char *msg =
_("The highlighted entry will be executed automatically in %ds.");
struct menu_viewer_data *data = dataptr;
char *msg_translated;
int posx;
grub_term_gotoxy (data->term, 0, grub_term_height (data->term) - 3);
msg_translated = grub_xasprintf (msg, timeout);
if (!msg_translated)
{
grub_print_error ();
grub_errno = GRUB_ERR_NONE;
return;
}
grub_print_message_indented (msg_translated, 3, 0, data->term);
posx = grub_term_getxy (data->term) >> 8;
print_spaces (grub_term_width (data->term) - posx - 1, data->term);
grub_term_gotoxy (data->term,
grub_term_cursor_x (data->term),
GRUB_TERM_FIRST_ENTRY_Y + data->offset);
grub_term_refresh (data->term);
}
static void
menu_text_set_chosen_entry (int entry, void *dataptr)
{
struct menu_viewer_data *data = dataptr;
int oldoffset = data->offset;
int complete_redraw = 0;
data->offset = entry - data->first;
if (data->offset > grub_term_num_entries (data->term) - 1)
{
data->first = entry - (grub_term_num_entries (data->term) - 1);
data->offset = grub_term_num_entries (data->term) - 1;
complete_redraw = 1;
}
if (data->offset < 0)
{
data->offset = 0;
data->first = entry;
complete_redraw = 1;
}
if (complete_redraw)
print_entries (data->menu, data->first, data->offset, data->term);
else
{
print_entry (GRUB_TERM_FIRST_ENTRY_Y + oldoffset, 0,
grub_menu_get_entry (data->menu, data->first + oldoffset),
data->term);
print_entry (GRUB_TERM_FIRST_ENTRY_Y + data->offset, 1,
grub_menu_get_entry (data->menu, data->first + data->offset),
data->term);
}
grub_term_refresh (data->term);
}
static void
menu_text_fini (void *dataptr)
{
struct menu_viewer_data *data = dataptr;
grub_term_setcursor (data->term, 1);
grub_term_cls (data->term);
}
static void
menu_text_clear_timeout (void *dataptr)
{
struct menu_viewer_data *data = dataptr;
grub_term_gotoxy (data->term, 0, grub_term_height (data->term) - 3);
print_spaces (grub_term_width (data->term) - 1, data->term);
grub_term_gotoxy (data->term, grub_term_cursor_x (data->term),
GRUB_TERM_FIRST_ENTRY_Y + data->offset);
grub_term_refresh (data->term);
}
grub_err_t
grub_menu_try_text (struct grub_term_output *term,
int entry, grub_menu_t menu, int nested)
{
struct menu_viewer_data *data;
struct grub_menu_viewer *instance;
instance = grub_zalloc (sizeof (*instance));
if (!instance)
return grub_errno;
data = grub_zalloc (sizeof (*data));
if (!data)
{
grub_free (instance);
return grub_errno;
}
data->term = term;
instance->data = data;
instance->set_chosen_entry = menu_text_set_chosen_entry;
instance->print_timeout = menu_text_print_timeout;
instance->clear_timeout = menu_text_clear_timeout;
instance->fini = menu_text_fini;
data->menu = menu;
data->offset = entry;
data->first = 0;
if (data->offset > grub_term_num_entries (data->term) - 1)
{
data->first = data->offset - (grub_term_num_entries (data->term) - 1);
data->offset = grub_term_num_entries (data->term) - 1;
}
grub_term_setcursor (data->term, 0);
grub_menu_init_page (nested, 0, data->term);
print_entries (menu, data->first, data->offset, data->term);
grub_term_refresh (data->term);
grub_menu_register_viewer (instance);
return GRUB_ERR_NONE;
}
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