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grub/normal/menu.c
marco_g 776bd7808d 2005-01-22 Vincent Pelletier <subdino2004@yahoo.fr> 
* normal/menu.c (TERM_WIDTH): Macro redefined.
	(TERM_TOP_BORDER_Y): Likewise.
	(draw_border): Replaced while-loop by a for-loop.  Make the number
	of lines consistent with the number of lines displayed in
	print_entries.  Added a margin below the rectangle.
	(print_entry): Make the entry fit in the rectangle.
	(print_entries): Display the scroll arrows next to the right
	border.
2005-01-22 13:29:18 +00:00

459 lines
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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2003,2004 Free Software Foundation, Inc.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <grub/normal.h>
#include <grub/term.h>
#include <grub/misc.h>
#include <grub/loader.h>
#include <grub/mm.h>
#include <grub/machine/time.h>
/* FIXME: These below are all runaround. */
#define DISP_LEFT 0x2190
#define DISP_UP 0x2191
#define DISP_RIGHT 0x2192
#define DISP_DOWN 0x2193
#define DISP_HLINE 0x2501
#define DISP_VLINE 0x2503
#define DISP_UL 0x250F
#define DISP_UR 0x2513
#define DISP_LL 0x2517
#define DISP_LR 0x251B
/* FIXME: These should be dynamically obtained from a terminal. */
#define TERM_WIDTH 80
#define TERM_HEIGHT 25
/* The number of lines of "GRUB version..." at the top. */
#define TERM_INFO_HEIGHT 1
/* The number of columns/lines between messages/borders/etc. */
#define TERM_MARGIN 1
/* The number of columns of scroll information. */
#define TERM_SCROLL_WIDTH 1
/* The Y position of the top border. */
#define TERM_TOP_BORDER_Y (TERM_MARGIN + TERM_INFO_HEIGHT + TERM_MARGIN)
/* The X position of the left border. */
#define TERM_LEFT_BORDER_X TERM_MARGIN
/* The width of the border. */
#define TERM_BORDER_WIDTH (TERM_WIDTH \
- TERM_MARGIN * 3 \
- TERM_SCROLL_WIDTH)
/* The number of lines of messages at the bottom. */
#define TERM_MESSAGE_HEIGHT 8
/* The height of the border. */
#define TERM_BORDER_HEIGHT (TERM_HEIGHT \
- TERM_TOP_BORDER_Y \
- TERM_MESSAGE_HEIGHT)
/* The number of entries shown at a time. */
#define TERM_NUM_ENTRIES (TERM_BORDER_HEIGHT - 2)
/* The Y position of the first entry. */
#define TERM_FIRST_ENTRY_Y (TERM_TOP_BORDER_Y + 1)
/* The max column number of an entry. The last "-1" is for a
continuation marker. */
#define TERM_ENTRY_WIDTH (TERM_BORDER_WIDTH - 2 - TERM_MARGIN * 2 - 1)
/* The standard X position of the cursor. */
#define TERM_CURSOR_X (TERM_LEFT_BORDER_X \
+ TERM_BORDER_WIDTH \
- TERM_MARGIN \
- 1)
static void
draw_border (void)
{
unsigned i;
grub_setcolorstate (GRUB_TERM_COLOR_NORMAL);
grub_gotoxy (TERM_MARGIN, TERM_TOP_BORDER_Y);
grub_putcode (DISP_UL);
for (i = 0; i < TERM_BORDER_WIDTH - 2; i++)
grub_putcode (DISP_HLINE);
grub_putcode (DISP_UR);
for (i = 0; i < (unsigned) TERM_NUM_ENTRIES; i++)
{
grub_gotoxy (TERM_MARGIN, TERM_TOP_BORDER_Y + i + 1);
grub_putcode (DISP_VLINE);
grub_gotoxy (TERM_MARGIN + TERM_BORDER_WIDTH - 1, TERM_TOP_BORDER_Y + i + 1);
grub_putcode (DISP_VLINE);
}
grub_gotoxy (TERM_MARGIN, TERM_TOP_BORDER_Y + TERM_NUM_ENTRIES + 1);
grub_putcode (DISP_LL);
for (i = 0; i < TERM_BORDER_WIDTH - 2; i++)
grub_putcode (DISP_HLINE);
grub_putcode (DISP_LR);
grub_setcolorstate (GRUB_TERM_COLOR_STANDARD);
grub_gotoxy (TERM_MARGIN, TERM_TOP_BORDER_Y + TERM_NUM_ENTRIES + TERM_MARGIN + 1);
}
static void
print_message (int nested, int edit)
{
if (edit)
{
grub_printf ("\n\
Minimum Emacs-like screen editing is supported. TAB lists\n\
available completions. Press C-x (\'x\' with Ctrl) to boot,\n\
C-c (\'c\' with Ctrl) for a command-line or ESC to return menu.");
}
else
{
grub_printf ("\n\
Use the %C and %C keys to select which entry is highlighted.\n",
(grub_uint32_t) DISP_UP, (grub_uint32_t) DISP_DOWN);
grub_printf ("\
Press enter to boot the selected OS, \'e\' to edit the\n\
commands before booting or \'c\' for a command-line.");
if (nested)
grub_printf ("\n\
ESC to return previous menu.");
}
}
static grub_menu_entry_t
get_entry (grub_menu_t menu, int no)
{
grub_menu_entry_t e;
for (e = menu->entry_list; e && no > 0; e = e->next, no--)
;
return e;
}
static void
print_entry (int y, int highlight, grub_menu_entry_t entry)
{
int x;
const char *title;
title = entry ? entry->title : "";
grub_setcolorstate (highlight
? GRUB_TERM_COLOR_HIGHLIGHT
: GRUB_TERM_COLOR_NORMAL);
grub_gotoxy (TERM_LEFT_BORDER_X + TERM_MARGIN, y);
grub_putchar (' ');
for (x = TERM_LEFT_BORDER_X + TERM_MARGIN + 1;
x < TERM_LEFT_BORDER_X + TERM_BORDER_WIDTH - TERM_MARGIN;
x++)
{
if (*title && x <= TERM_LEFT_BORDER_X + TERM_BORDER_WIDTH - TERM_MARGIN - 1)
{
if (x == TERM_LEFT_BORDER_X + TERM_BORDER_WIDTH - TERM_MARGIN - 1)
grub_putcode (DISP_RIGHT);
else
grub_putchar (*title++);
}
else
grub_putchar (' ');
}
grub_gotoxy (TERM_CURSOR_X, y);
grub_setcolorstate (GRUB_TERM_COLOR_STANDARD);
}
static void
print_entries (grub_menu_t menu, int first, int offset)
{
grub_menu_entry_t e;
int i;
grub_gotoxy (TERM_LEFT_BORDER_X + TERM_BORDER_WIDTH,
TERM_FIRST_ENTRY_Y);
if (first)
grub_putcode (DISP_UP);
else
grub_putchar (' ');
e = get_entry (menu, first);
for (i = 0; i < TERM_NUM_ENTRIES; i++)
{
print_entry (TERM_FIRST_ENTRY_Y + i, offset == i, e);
if (e)
e = e->next;
}
grub_gotoxy (TERM_LEFT_BORDER_X + TERM_BORDER_WIDTH,
TERM_TOP_BORDER_Y + TERM_NUM_ENTRIES);
if (e)
grub_putcode (DISP_DOWN);
else
grub_putchar (' ');
grub_gotoxy (TERM_CURSOR_X, TERM_FIRST_ENTRY_Y + offset);
}
static void
init_page (int nested, int edit)
{
grub_normal_init_page ();
draw_border ();
print_message (nested, edit);
}
/* Edit a menu entry with an Emacs-like interface. */
static void
edit_menu_entry (grub_menu_entry_t entry)
{
/* Not yet implemented. */
}
static int
run_menu (grub_menu_t menu, int nested)
{
int first, offset;
unsigned long saved_time;
first = 0;
offset = menu->default_entry;
if (offset > TERM_NUM_ENTRIES - 1)
{
first = offset - (TERM_NUM_ENTRIES - 1);
offset = TERM_NUM_ENTRIES - 1;
}
/* Initialize the time. */
saved_time = grub_get_rtc ();
refresh:
grub_setcursor (0);
init_page (nested, 0);
print_entries (menu, first, offset);
grub_refresh ();
while (1)
{
int c;
if (menu->timeout > 0)
{
unsigned long current_time;
current_time = grub_get_rtc ();
if (current_time - saved_time >= GRUB_TICKS_PER_SECOND)
{
menu->timeout--;
saved_time = current_time;
}
grub_gotoxy (0, TERM_HEIGHT - 3);
/* NOTE: Do not remove the trailing space characters.
They are required to clear the line. */
grub_printf ("\
The highlighted entry will be booted automatically in %d seconds. ",
menu->timeout);
grub_gotoxy (TERM_CURSOR_X, TERM_FIRST_ENTRY_Y + offset);
grub_refresh ();
}
if (menu->timeout == 0)
return menu->default_entry;
if (grub_checkkey () >= 0 || menu->timeout < 0)
{
c = GRUB_TERM_ASCII_CHAR (grub_getkey ());
if (menu->timeout >= 0)
{
grub_gotoxy (0, TERM_HEIGHT - 3);
grub_printf ("\
");
menu->timeout = -1;
menu->fallback_entry = -1;
grub_gotoxy (TERM_CURSOR_X, TERM_FIRST_ENTRY_Y + offset);
}
switch (c)
{
case 16:
case '^':
if (offset > 0)
{
print_entry (TERM_FIRST_ENTRY_Y + offset, 0,
get_entry (menu, first + offset));
offset--;
print_entry (TERM_FIRST_ENTRY_Y + offset, 1,
get_entry (menu, first + offset));
}
else if (first > 0)
{
first--;
print_entries (menu, first, offset);
}
break;
case 14:
case 'v':
if (menu->size > first + offset + 1)
{
if (offset < TERM_NUM_ENTRIES - 1)
{
print_entry (TERM_FIRST_ENTRY_Y + offset, 0,
get_entry (menu, first + offset));
offset++;
print_entry (TERM_FIRST_ENTRY_Y + offset, 1,
get_entry (menu, first + offset));
}
else
{
first++;
print_entries (menu, first, offset);
}
}
break;
case '\n':
case '\r':
case 6:
grub_setcursor (1);
return first + offset;
case '\e':
if (nested)
{
grub_setcursor (1);
return -1;
}
break;
case 'c':
grub_setcursor (1);
grub_cmdline_run (1);
goto refresh;
case 'e':
edit_menu_entry (get_entry (menu, first + offset));
goto refresh;
default:
break;
}
grub_refresh ();
}
}
/* Never reach here. */
return -1;
}
/* Run a menu entry. */
static void
run_menu_entry (grub_menu_entry_t entry)
{
grub_command_list_t cl;
for (cl = entry->command_list; cl != 0; cl = cl->next)
{
grub_command_t c;
if (cl->command[0] == '\0')
/* Ignore an empty command line. */
continue;
c = grub_command_find (cl->command);
if (! c)
break;
if (! (c->flags & GRUB_COMMAND_FLAG_CMDLINE))
{
grub_error (GRUB_ERR_INVALID_COMMAND,
"invalid command `%s'",
cl->command);
break;
}
if (! (c->flags & GRUB_COMMAND_FLAG_NO_ECHO))
grub_printf ("%s\n", cl->command);
if (grub_command_execute (cl->command) != 0)
break;
}
if (grub_errno == GRUB_ERR_NONE && grub_loader_is_loaded ())
/* Implicit execution of boot, only if something is loaded. */
grub_command_execute ("boot");
}
void
grub_menu_run (grub_menu_t menu, int nested)
{
while (1)
{
int boot_entry;
grub_menu_entry_t e;
boot_entry = run_menu (menu, nested);
if (boot_entry < 0)
break;
grub_cls ();
grub_setcursor (1);
e = get_entry (menu, boot_entry);
grub_printf (" Booting \'%s\'\n\n", e->title);
run_menu_entry (e);
/* Deal with a fallback entry. */
/* FIXME: Multiple fallback entries like GRUB Legacy. */
if (menu->fallback_entry >= 0)
{
grub_print_error ();
grub_errno = GRUB_ERR_NONE;
e = get_entry (menu, menu->fallback_entry);
menu->fallback_entry = -1;
grub_printf ("\n Falling back to \'%s\'\n\n", e->title);
run_menu_entry (e);
}
if (grub_errno != GRUB_ERR_NONE)
{
grub_print_error ();
grub_errno = GRUB_ERR_NONE;
/* Wait until the user pushes any key so that the user
can see what happened. */
grub_printf ("\nPress any key to continue...");
(void) grub_getkey ();
}
}
}
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