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grub/normal/menu_entry.c
Vladimir 'phcoder' Serbinenko 36b71abfaa Fix few memory bugs
2010-03-23 16:46:45 +01:00

1408 lines
31 KiB
C
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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 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/mm.h>
#include <grub/loader.h>
#include <grub/command.h>
#include <grub/parser.h>
#include <grub/auth.h>
#include <grub/i18n.h>
#include <grub/charset.h>
enum update_mode
{
NO_LINE,
SINGLE_LINE,
ALL_LINES
};
struct line
{
/* The line buffer. */
char *buf;
/* The length of the line. */
int len;
/* The maximum length of the line. */
int max_len;
};
struct per_term_screen
{
struct grub_term_output *term;
/* The X coordinate. */
int x;
/* The Y coordinate. */
int y;
};
struct screen
{
/* The array of lines. */
struct line *lines;
/* The number of lines. */
int num_lines;
/* The current column. */
int column;
/* The real column. */
int real_column;
/* The current line. */
int line;
/* The kill buffer. */
char *killed_text;
/* The flag of a completion window. */
int completion_shown;
struct per_term_screen *terms;
unsigned nterms;
};
/* Used for storing completion items temporarily. */
static struct line completion_buffer;
static int completion_type;
/* Initialize a line. */
static int
init_line (struct line *linep)
{
linep->len = 0;
linep->max_len = 80; /* XXX */
linep->buf = grub_malloc (linep->max_len);
if (! linep->buf)
return 0;
return 1;
}
/* Allocate extra space if necessary. */
static int
ensure_space (struct line *linep, int extra)
{
if (linep->max_len < linep->len + extra)
{
linep->max_len = linep->len + extra + 80; /* XXX */
linep->buf = grub_realloc (linep->buf, linep->max_len + 1);
if (! linep->buf)
return 0;
}
return 1;
}
/* Return the number of lines occupied by this line on the screen. */
static int
get_logical_num_lines (struct line *linep, struct per_term_screen *term_screen)
{
return (linep->len / grub_term_entry_width (term_screen->term)) + 1;
}
/* Print a line. */
static void
print_line (struct line *linep, int offset, int start, int y,
struct per_term_screen *term_screen)
{
grub_term_gotoxy (term_screen->term,
GRUB_TERM_LEFT_BORDER_X + GRUB_TERM_MARGIN + start + 1,
y + GRUB_TERM_FIRST_ENTRY_Y);
if (linep->len >= offset + grub_term_entry_width (term_screen->term))
{
char *p, c;
p = linep->buf + offset + grub_term_entry_width (term_screen->term);
c = *p;
*p = 0;
grub_puts_terminal (linep->buf + offset + start, term_screen->term);
*p = c;
grub_putcode ('\\', term_screen->term);
}
else
{
int i;
char *p, c;
p = linep->buf + linep->len;
c = *p;
*p = 0;
grub_puts_terminal (linep->buf + offset + start, term_screen->term);
*p = c;
for (i = 0;
i <= grub_term_entry_width (term_screen->term) - linep->len + offset;
i++)
grub_putcode (' ', term_screen->term);
}
}
/* Print an empty line. */
static void
print_empty_line (int y, struct per_term_screen *term_screen)
{
int i;
grub_term_gotoxy (term_screen->term,
GRUB_TERM_LEFT_BORDER_X + GRUB_TERM_MARGIN + 1,
y + GRUB_TERM_FIRST_ENTRY_Y);
for (i = 0; i < grub_term_entry_width (term_screen->term) + 1; i++)
grub_putcode (' ', term_screen->term);
}
/* Print an up arrow. */
static void
print_up (int flag, struct per_term_screen *term_screen)
{
grub_term_gotoxy (term_screen->term, GRUB_TERM_LEFT_BORDER_X
+ grub_term_entry_width (term_screen->term),
GRUB_TERM_FIRST_ENTRY_Y);
if (flag)
grub_putcode (GRUB_TERM_DISP_UP, term_screen->term);
else
grub_putcode (' ', term_screen->term);
}
/* Print a down arrow. */
static void
print_down (int flag, struct per_term_screen *term_screen)
{
grub_term_gotoxy (term_screen->term, GRUB_TERM_LEFT_BORDER_X
+ grub_term_border_width (term_screen->term),
GRUB_TERM_TOP_BORDER_Y
+ grub_term_num_entries (term_screen->term));
if (flag)
grub_putcode (GRUB_TERM_DISP_DOWN, term_screen->term);
else
grub_putcode (' ', term_screen->term);
}
/* Draw the lines of the screen SCREEN. */
static void
update_screen (struct screen *screen, struct per_term_screen *term_screen,
int region_start, int region_column,
int up, int down, enum update_mode mode)
{
int up_flag = 0;
int down_flag = 0;
int y;
int i;
struct line *linep;
/* Check if scrolling is necessary. */
if (term_screen->y < 0 || term_screen->y
>= grub_term_num_entries (term_screen->term))
{
if (term_screen->y < 0)
term_screen->y = 0;
else
term_screen->y = grub_term_num_entries (term_screen->term) - 1;
region_start = 0;
region_column = 0;
up = 1;
down = 1;
mode = ALL_LINES;
}
if (mode != NO_LINE)
{
/* Draw lines. This code is tricky, because this must calculate logical
positions. */
y = term_screen->y - screen->column
/ grub_term_entry_width (term_screen->term);
i = screen->line;
linep = screen->lines + i;
while (y > 0)
{
i--;
linep--;
y -= get_logical_num_lines (linep, term_screen);
}
if (y < 0 || i > 0)
up_flag = 1;
do
{
int column;
if (linep >= screen->lines + screen->num_lines)
break;
for (column = 0;
column <= linep->len
&& y < grub_term_num_entries (term_screen->term);
column += grub_term_entry_width (term_screen->term), y++)
{
if (y < 0)
continue;
if (i == region_start)
{
if (region_column >= column
&& region_column
< (column
+ grub_term_entry_width (term_screen->term)))
print_line (linep, column, region_column - column, y,
term_screen);
else if (region_column < column)
print_line (linep, column, 0, y, term_screen);
}
else if (i > region_start && mode == ALL_LINES)
print_line (linep, column, 0, y, term_screen);
}
if (y == grub_term_num_entries (term_screen->term))
{
if (column <= linep->len || i + 1 < screen->num_lines)
down_flag = 1;
}
linep++;
i++;
if (mode == ALL_LINES && i == screen->num_lines)
for (; y < grub_term_num_entries (term_screen->term); y++)
print_empty_line (y, term_screen);
}
while (y < grub_term_num_entries (term_screen->term));
/* Draw up and down arrows. */
if (up)
print_up (up_flag, term_screen);
if (down)
print_down (down_flag, term_screen);
}
/* Place the cursor. */
grub_term_gotoxy (term_screen->term,
GRUB_TERM_LEFT_BORDER_X + GRUB_TERM_MARGIN + 1
+ term_screen->x,
GRUB_TERM_FIRST_ENTRY_Y + term_screen->y);
grub_term_refresh (term_screen->term);
}
static void
update_screen_all (struct screen *screen,
int region_start, int region_column,
int up, int down, enum update_mode mode)
{
unsigned i;
for (i = 0; i < screen->nterms; i++)
update_screen (screen, &screen->terms[i], region_start, region_column,
up, down, mode);
}
static int
insert_string (struct screen *screen, char *s, int update)
{
int region_start = screen->num_lines;
int region_column = 0;
int down[screen->nterms];
enum update_mode mode[screen->nterms];
unsigned i;
for (i = 0; i < screen->nterms; i++)
{
down[i] = 0;
mode[i] = NO_LINE;
}
while (*s)
{
if (*s == '\n')
{
/* LF is special because it creates a new line. */
struct line *current_linep;
struct line *next_linep;
int size;
/* Make a new line. */
screen->num_lines++;
screen->lines = grub_realloc (screen->lines,
screen->num_lines
* sizeof (screen->lines[0]));
if (! screen->lines)
return 0;
/* Scroll down. */
grub_memmove (screen->lines + screen->line + 2,
screen->lines + screen->line + 1,
((screen->num_lines - screen->line - 2)
* sizeof (struct line)));
if (! init_line (screen->lines + screen->line + 1))
return 0;
/* Fold the line. */
current_linep = screen->lines + screen->line;
next_linep = current_linep + 1;
size = current_linep->len - screen->column;
if (! ensure_space (next_linep, size))
return 0;
grub_memmove (next_linep->buf,
current_linep->buf + screen->column,
size);
current_linep->len = screen->column;
next_linep->len = size;
/* Update a dirty region. */
if (region_start > screen->line)
{
region_start = screen->line;
region_column = screen->column;
}
for (i = 0; i < screen->nterms; i++)
{
mode[i] = ALL_LINES;
down[i] = 1; /* XXX not optimal. */
}
/* Move the cursor. */
screen->column = screen->real_column = 0;
screen->line++;
for (i = 0; i < screen->nterms; i++)
{
screen->terms[i].x = 0;
screen->terms[i].y++;
}
s++;
}
else
{
/* All but LF. */
char *p;
struct line *current_linep;
int size;
int orig_num[screen->nterms], new_num[screen->nterms];
/* Find a string delimited by LF. */
p = grub_strchr (s, '\n');
if (! p)
p = s + grub_strlen (s);
/* Insert the string. */
current_linep = screen->lines + screen->line;
size = p - s;
if (! ensure_space (current_linep, size))
return 0;
grub_memmove (current_linep->buf + screen->column + size,
current_linep->buf + screen->column,
current_linep->len - screen->column);
grub_memmove (current_linep->buf + screen->column,
s,
size);
for (i = 0; i < screen->nterms; i++)
orig_num[i] = get_logical_num_lines (current_linep,
&screen->terms[i]);
current_linep->len += size;
for (i = 0; i < screen->nterms; i++)
new_num[i] = get_logical_num_lines (current_linep,
&screen->terms[i]);
/* Update the dirty region. */
if (region_start > screen->line)
{
region_start = screen->line;
region_column = screen->column;
}
for (i = 0; i < screen->nterms; i++)
if (orig_num[i] != new_num[i])
{
mode[i] = ALL_LINES;
down[i] = 1; /* XXX not optimal. */
}
else if (mode[i] != ALL_LINES)
mode[i] = SINGLE_LINE;
/* Move the cursor. */
screen->column += size;
screen->real_column = screen->column;
for (i = 0; i < screen->nterms; i++)
{
screen->terms[i].x += size;
screen->terms[i].y += screen->terms[i].x
/ grub_term_entry_width (screen->terms[i].term);
screen->terms[i].x
%= grub_term_entry_width (screen->terms[i].term);
}
s = p;
}
}
if (update)
for (i = 0; i < screen->nterms; i++)
update_screen (screen, &screen->terms[i],
region_start, region_column, 0, down[i], mode[i]);
return 1;
}
/* Release the resource allocated for SCREEN. */
static void
destroy_screen (struct screen *screen)
{
int i;
if (screen->lines)
for (i = 0; i < screen->num_lines; i++)
{
struct line *linep = screen->lines + i;
if (linep)
grub_free (linep->buf);
}
grub_free (screen->killed_text);
grub_free (screen->lines);
grub_free (screen->terms);
grub_free (screen);
}
/* Make a new screen. */
static struct screen *
make_screen (grub_menu_entry_t entry)
{
struct screen *screen;
unsigned i;
/* Initialize the screen. */
screen = grub_zalloc (sizeof (*screen));
if (! screen)
return 0;
screen->num_lines = 1;
screen->lines = grub_malloc (sizeof (struct line));
if (! screen->lines)
goto fail;
/* Initialize the first line which must be always present. */
if (! init_line (screen->lines))
goto fail;
insert_string (screen, (char *) entry->sourcecode, 0);
/* Reset the cursor position. */
screen->column = 0;
screen->real_column = 0;
screen->line = 0;
for (i = 0; i < screen->nterms; i++)
{
screen->terms[i].x = 0;
screen->terms[i].y = 0;
}
return screen;
fail:
destroy_screen (screen);
return 0;
}
static int
forward_char (struct screen *screen, int update)
{
struct line *linep;
unsigned i;
linep = screen->lines + screen->line;
if (screen->column < linep->len)
{
screen->column++;
for (i = 0; i < screen->nterms; i++)
{
screen->terms[i].x++;
if (screen->terms[i].x
== grub_term_entry_width (screen->terms[i].term))
{
screen->terms[i].x = 0;
screen->terms[i].y++;
}
}
}
else if (screen->num_lines > screen->line + 1)
{
screen->column = 0;
screen->line++;
for (i = 0; i < screen->nterms; i++)
{
screen->terms[i].x = 0;
screen->terms[i].y++;
}
}
screen->real_column = screen->column;
if (update)
update_screen_all (screen, screen->num_lines, 0, 0, 0, NO_LINE);
return 1;
}
static int
backward_char (struct screen *screen, int update)
{
unsigned i;
if (screen->column > 0)
{
screen->column--;
for (i = 0; i < screen->nterms; i++)
{
screen->terms[i].x--;
if (screen->terms[i].x == -1)
{
screen->terms[i].x
= grub_term_entry_width (screen->terms[i].term) - 1;
screen->terms[i].y--;
}
}
}
else if (screen->line > 0)
{
struct line *linep;
screen->line--;
linep = screen->lines + screen->line;
screen->column = linep->len;
for (i = 0; i < screen->nterms; i++)
{
screen->terms[i].x = screen->column
% grub_term_entry_width (screen->terms[i].term);
screen->terms[i].y--;
}
}
screen->real_column = screen->column;
if (update)
update_screen_all (screen, screen->num_lines, 0, 0, 0, NO_LINE);
return 1;
}
static int
previous_line (struct screen *screen, int update)
{
unsigned i;
if (screen->line > 0)
{
struct line *linep;
int col;
/* How many physical lines from the current position
to the first physical line? */
col = screen->column;
screen->line--;
linep = screen->lines + screen->line;
if (linep->len < screen->real_column)
screen->column = linep->len;
else
screen->column = screen->real_column;
for (i = 0; i < screen->nterms; i++)
{
int dy;
dy = col / grub_term_entry_width (screen->terms[i].term);
/* How many physical lines from the current position
to the last physical line? */
dy += (linep->len / grub_term_entry_width (screen->terms[i].term)
- screen->column
/ grub_term_entry_width (screen->terms[i].term));
screen->terms[i].y -= dy + 1;
screen->terms[i].x
= screen->column % grub_term_entry_width (screen->terms[i].term);
}
}
else
{
for (i = 0; i < screen->nterms; i++)
{
screen->terms[i].y
-= screen->column / grub_term_entry_width (screen->terms[i].term);
screen->terms[i].x = 0;
}
screen->column = 0;
}
if (update)
update_screen_all (screen, screen->num_lines, 0, 0, 0, NO_LINE);
return 1;
}
static int
next_line (struct screen *screen, int update)
{
unsigned i;
if (screen->line < screen->num_lines - 1)
{
struct line *linep;
int l1, c1;
/* How many physical lines from the current position
to the last physical line? */
linep = screen->lines + screen->line;
l1 = linep->len;
c1 = screen->column;
screen->line++;
linep++;
if (linep->len < screen->real_column)
screen->column = linep->len;
else
screen->column = screen->real_column;
for (i = 0; i < screen->nterms; i++)
{
int dy;
dy = l1 / grub_term_entry_width (screen->terms[i].term)
- c1 / grub_term_entry_width (screen->terms[i].term);
/* How many physical lines from the current position
to the first physical line? */
dy += screen->column / grub_term_entry_width (screen->terms[i].term);
screen->terms[i].y += dy + 1;
screen->terms[i].x = screen->column
% grub_term_entry_width (screen->terms[i].term);
}
}
else
{
struct line *linep;
int l, s;
linep = screen->lines + screen->line;
l = linep->len;
s = screen->column;
screen->column = linep->len;
for (i = 0; i < screen->nterms; i++)
{
screen->terms[i].y
+= (l / grub_term_entry_width (screen->terms[i].term)
- s / grub_term_entry_width (screen->terms[i].term));
screen->terms[i].x
= screen->column % grub_term_entry_width (screen->terms[i].term);
}
}
if (update)
update_screen_all (screen, screen->num_lines, 0, 0, 0, NO_LINE);
return 1;
}
static int
beginning_of_line (struct screen *screen, int update)
{
unsigned i;
int col;
col = screen->column;
screen->column = screen->real_column = 0;
for (i = 0; i < screen->nterms; i++)
{
screen->terms[i].x = 0;
screen->terms[i].y -= col / grub_term_entry_width (screen->terms[i].term);
}
if (update)
update_screen_all (screen, screen->num_lines, 0, 0, 0, NO_LINE);
return 1;
}
static int
end_of_line (struct screen *screen, int update)
{
struct line *linep;
unsigned i;
int col;
linep = screen->lines + screen->line;
col = screen->column;
screen->column = screen->real_column = linep->len;
for (i = 0; i < screen->nterms; i++)
{
screen->terms[i].y
+= (linep->len / grub_term_entry_width (screen->terms->term)
- col / grub_term_entry_width (screen->terms->term));
screen->terms[i].x
= screen->column % grub_term_entry_width (screen->terms->term);
}
if (update)
update_screen_all (screen, screen->num_lines, 0, 0, 0, NO_LINE);
return 1;
}
static int
delete_char (struct screen *screen, int update)
{
struct line *linep;
int start = screen->num_lines;
int column = 0;
linep = screen->lines + screen->line;
if (linep->len > screen->column)
{
int orig_num[screen->nterms], new_num;
unsigned i;
for (i = 0; i < screen->nterms; i++)
orig_num[i] = get_logical_num_lines (linep, &screen->terms[i]);
grub_memmove (linep->buf + screen->column,
linep->buf + screen->column + 1,
linep->len - screen->column - 1);
linep->len--;
start = screen->line;
column = screen->column;
screen->real_column = screen->column;
if (update)
{
for (i = 0; i < screen->nterms; i++)
{
new_num = get_logical_num_lines (linep, &screen->terms[i]);
if (orig_num[i] != new_num)
update_screen (screen, &screen->terms[i],
start, column, 0, 0, ALL_LINES);
else
update_screen (screen, &screen->terms[i],
start, column, 0, 0, SINGLE_LINE);
}
}
}
else if (screen->num_lines > screen->line + 1)
{
struct line *next_linep;
next_linep = linep + 1;
if (! ensure_space (linep, next_linep->len))
return 0;
grub_memmove (linep->buf + linep->len, next_linep->buf, next_linep->len);
linep->len += next_linep->len;
grub_free (next_linep->buf);
grub_memmove (next_linep,
next_linep + 1,
(screen->num_lines - screen->line - 2)
* sizeof (struct line));
screen->num_lines--;
start = screen->line;
column = screen->column;
screen->real_column = screen->column;
if (update)
update_screen_all (screen, start, column, 0, 1, ALL_LINES);
}
return 1;
}
static int
backward_delete_char (struct screen *screen, int update)
{
int saved_column;
int saved_line;
saved_column = screen->column;
saved_line = screen->line;
if (! backward_char (screen, 0))
return 0;
if (saved_column != screen->column || saved_line != screen->line)
if (! delete_char (screen, update))
return 0;
return 1;
}
static int
kill_line (struct screen *screen, int continuous, int update)
{
struct line *linep;
char *p;
int size;
int offset;
p = screen->killed_text;
if (! continuous && p)
p[0] = '\0';
linep = screen->lines + screen->line;
size = linep->len - screen->column;
if (p)
offset = grub_strlen (p);
else
offset = 0;
if (size > 0)
{
int orig_num[screen->nterms], new_num;
unsigned i;
p = grub_realloc (p, offset + size + 1);
if (! p)
return 0;
grub_memmove (p + offset, linep->buf + screen->column, size);
p[offset + size - 1] = '\0';
screen->killed_text = p;
for (i = 0; i < screen->nterms; i++)
orig_num[i] = get_logical_num_lines (linep, &screen->terms[i]);
linep->len = screen->column;
if (update)
{
new_num = get_logical_num_lines (linep, &screen->terms[i]);
for (i = 0; i < screen->nterms; i++)
{
if (orig_num[i] != new_num)
update_screen (screen, &screen->terms[i],
screen->line, screen->column, 0, 1, ALL_LINES);
else
update_screen (screen, &screen->terms[i],
screen->line, screen->column, 0, 0, SINGLE_LINE);
}
}
}
else if (screen->line + 1 < screen->num_lines)
{
p = grub_realloc (p, offset + 1 + 1);
if (! p)
return 0;
p[offset] = '\n';
p[offset + 1] = '\0';
screen->killed_text = p;
return delete_char (screen, update);
}
return 1;
}
static int
yank (struct screen *screen, int update)
{
if (screen->killed_text)
return insert_string (screen, screen->killed_text, update);
return 1;
}
static int
open_line (struct screen *screen, int update)
{
int saved_y[screen->nterms];
unsigned i;
for (i = 0; i < screen->nterms; i++)
saved_y[i] = screen->terms[i].y;
if (! insert_string (screen, "\n", 0))
return 0;
if (! backward_char (screen, 0))
return 0;
for (i = 0; i < screen->nterms; i++)
screen->terms[i].y = saved_y[i];
if (update)
update_screen_all (screen, screen->line, screen->column, 0, 1, ALL_LINES);
return 1;
}
/* A completion hook to print items. */
static void
store_completion (const char *item, grub_completion_type_t type,
int count __attribute__ ((unused)))
{
char *p;
completion_type = type;
/* Make sure that the completion buffer has enough room. */
if (completion_buffer.max_len < (completion_buffer.len
+ (int) grub_strlen (item) + 1 + 1))
{
grub_size_t new_len;
new_len = completion_buffer.len + grub_strlen (item) + 80;
p = grub_realloc (completion_buffer.buf, new_len);
if (! p)
{
/* Possibly not fatal. */
grub_errno = GRUB_ERR_NONE;
return;
}
p[completion_buffer.len] = 0;
completion_buffer.buf = p;
completion_buffer.max_len = new_len;
}
p = completion_buffer.buf + completion_buffer.len;
if (completion_buffer.len != 0)
{
*p++ = ' ';
completion_buffer.len++;
}
grub_strcpy (p, item);
completion_buffer.len += grub_strlen (item);
}
static int
complete (struct screen *screen, int continuous, int update)
{
char saved_char;
struct line *linep;
int restore;
char *insert;
static int count = -1;
unsigned i;
grub_uint32_t *ucs4;
grub_size_t buflen;
grub_ssize_t ucs4len;
if (continuous)
count++;
else
count = 0;
completion_buffer.buf = 0;
completion_buffer.len = 0;
completion_buffer.max_len = 0;
linep = screen->lines + screen->line;
saved_char = linep->buf[screen->column];
linep->buf[screen->column] = '\0';
insert = grub_normal_do_completion (linep->buf, &restore, store_completion);
linep->buf[screen->column] = saved_char;
if (completion_buffer.buf)
{
buflen = grub_strlen (completion_buffer.buf);
ucs4 = grub_malloc (sizeof (grub_uint32_t) * (buflen + 1));
if (!ucs4)
{
grub_print_error ();
grub_errno = GRUB_ERR_NONE;
return 1;
}
ucs4len = grub_utf8_to_ucs4 (ucs4, buflen,
(grub_uint8_t *) completion_buffer.buf,
buflen, 0);
ucs4[ucs4len] = 0;
if (restore)
for (i = 0; i < screen->nterms; i++)
{
int num_sections = ((completion_buffer.len
+ grub_term_width (screen->terms[i].term)
- 8 - 1)
/ (grub_term_width (screen->terms[i].term)
- 8));
grub_uint32_t *endp;
grub_uint16_t pos;
grub_uint32_t *p = ucs4;
pos = grub_term_getxy (screen->terms[i].term);
grub_term_gotoxy (screen->terms[i].term, 0,
grub_term_height (screen->terms[i].term) - 3);
screen->completion_shown = 1;
grub_term_gotoxy (screen->terms[i].term, 0,
grub_term_height (screen->terms[i].term) - 3);
grub_puts_terminal (" ", screen->terms[i].term);
switch (completion_type)
{
case GRUB_COMPLETION_TYPE_COMMAND:
grub_puts_terminal (_("Possible commands are:"),
screen->terms[i].term);
break;
case GRUB_COMPLETION_TYPE_DEVICE:
grub_puts_terminal (_("Possible devices are:"),
screen->terms[i].term);
break;
case GRUB_COMPLETION_TYPE_FILE:
grub_puts_terminal (_("Possible files are:"),
screen->terms[i].term);
break;
case GRUB_COMPLETION_TYPE_PARTITION:
grub_puts_terminal (_("Possible partitions are:"),
screen->terms[i].term);
break;
case GRUB_COMPLETION_TYPE_ARGUMENT:
grub_puts_terminal (_("Possible arguments are:"),
screen->terms[i].term);
break;
default:
grub_puts_terminal (_("Possible things are:"),
screen->terms[i].term);
break;
}
grub_puts_terminal ("\n ", screen->terms[i].term);
p += (count % num_sections)
* (grub_term_width (screen->terms[i].term) - 8);
endp = p + (grub_term_width (screen->terms[i].term) - 8);
if (p != ucs4)
grub_putcode (GRUB_TERM_DISP_LEFT, screen->terms[i].term);
else
grub_putcode (' ', screen->terms[i].term);
grub_print_ucs4 (p, ucs4 + ucs4len < endp ? ucs4 + ucs4len : endp,
0, 0, screen->terms[i].term);
if (ucs4 + ucs4len > endp)
grub_putcode (GRUB_TERM_DISP_RIGHT, screen->terms[i].term);
grub_term_gotoxy (screen->terms[i].term, pos >> 8, pos & 0xFF);
}
}
if (insert)
{
insert_string (screen, insert, update);
count = -1;
grub_free (insert);
}
else if (update)
grub_refresh ();
grub_free (completion_buffer.buf);
return 1;
}
/* Clear displayed completions. */
static void
clear_completions (struct per_term_screen *term_screen)
{
grub_uint16_t pos;
unsigned i, j;
pos = grub_term_getxy (term_screen->term);
grub_term_gotoxy (term_screen->term, 0,
grub_term_height (term_screen->term) - 3);
for (i = 0; i < 2; i++)
{
for (j = 0; j < grub_term_width (term_screen->term) - 1; j++)
grub_putcode (' ', term_screen->term);
grub_putcode ('\n', term_screen->term);
}
grub_term_gotoxy (term_screen->term, pos >> 8, pos & 0xFF);
grub_term_refresh (term_screen->term);
}
static void
clear_completions_all (struct screen *screen)
{
unsigned i;
for (i = 0; i < screen->nterms; i++)
clear_completions (&screen->terms[i]);
}
/* Execute the command list in the screen SCREEN. */
static int
run (struct screen *screen)
{
int currline = 0;
char *nextline;
auto grub_err_t editor_getline (char **line, int cont);
grub_err_t editor_getline (char **line, int cont __attribute__ ((unused)))
{
struct line *linep = screen->lines + currline;
char *p;
if (currline > screen->num_lines)
{
*line = 0;
return 0;
}
/* Trim down space characters. */
for (p = linep->buf + linep->len - 1;
p >= linep->buf && grub_isspace (*p);
p--)
;
*++p = '\0';
linep->len = p - linep->buf;
for (p = linep->buf; grub_isspace (*p); p++)
;
*line = grub_strdup (p);
currline++;
return 0;
}
grub_cls ();
grub_printf (" ");
grub_printf_ (N_("Booting a command list"));
grub_printf ("\n\n");
/* Execute the script, line for line. */
while (currline < screen->num_lines)
{
editor_getline (&nextline, 0);
if (grub_parser_get_current ()->parse_line (nextline, editor_getline))
break;
}
if (grub_errno == GRUB_ERR_NONE && grub_loader_is_loaded ())
/* Implicit execution of boot, only if something is loaded. */
grub_command_execute ("boot", 0, 0);
if (grub_errno != GRUB_ERR_NONE)
{
grub_print_error ();
grub_errno = GRUB_ERR_NONE;
grub_wait_after_message ();
}
return 1;
}
/* Edit a menu entry with an Emacs-like interface. */
void
grub_menu_entry_run (grub_menu_entry_t entry)
{
struct screen *screen;
int prev_c;
grub_err_t err = GRUB_ERR_NONE;
unsigned i;
grub_term_output_t term;
err = grub_auth_check_authentication (NULL);
if (err)
{
grub_print_error ();
grub_errno = GRUB_ERR_NONE;
return;
}
screen = make_screen (entry);
if (! screen)
return;
screen->terms = NULL;
refresh:
grub_free (screen->terms);
screen->nterms = 0;
FOR_ACTIVE_TERM_OUTPUTS(term)
screen->nterms++;
screen->terms = grub_malloc (screen->nterms * sizeof (screen->terms[0]));
if (!screen->terms)
{
grub_print_error ();
grub_errno = GRUB_ERR_NONE;
return;
}
i = 0;
FOR_ACTIVE_TERM_OUTPUTS(term)
{
screen->terms[i].term = term;
screen->terms[i].x = 0;
screen->terms[i].y = 0;
i++;
}
/* Draw the screen. */
for (i = 0; i < screen->nterms; i++)
grub_menu_init_page (0, 1, screen->terms[i].term);
update_screen_all (screen, 0, 0, 1, 1, ALL_LINES);
for (i = 0; i < screen->nterms; i++)
grub_term_setcursor (screen->terms[i].term, 1);
prev_c = '\0';
while (1)
{
int c = GRUB_TERM_ASCII_CHAR (grub_getkey ());
if (screen->completion_shown)
{
clear_completions_all (screen);
screen->completion_shown = 0;
}
if (grub_normal_exit_level)
{
destroy_screen (screen);
return;
}
switch (c)
{
case 16: /* C-p */
if (! previous_line (screen, 1))
goto fail;
break;
case 14: /* C-n */
if (! next_line (screen, 1))
goto fail;
break;
case 6: /* C-f */
if (! forward_char (screen, 1))
goto fail;
break;
case 2: /* C-b */
if (! backward_char (screen, 1))
goto fail;
break;
case 1: /* C-a */
if (! beginning_of_line (screen, 1))
goto fail;
break;
case 5: /* C-e */
if (! end_of_line (screen, 1))
goto fail;
break;
case '\t': /* C-i */
if (! complete (screen, prev_c == c, 1))
goto fail;
break;
case 4: /* C-d */
if (! delete_char (screen, 1))
goto fail;
break;
case 8: /* C-h */
if (! backward_delete_char (screen, 1))
goto fail;
break;
case 11: /* C-k */
if (! kill_line (screen, prev_c == c, 1))
goto fail;
break;
case 21: /* C-u */
/* FIXME: What behavior is good for this key? */
break;
case 25: /* C-y */
if (! yank (screen, 1))
goto fail;
break;
case 12: /* C-l */
/* FIXME: centering. */
goto refresh;
case 15: /* C-o */
if (! open_line (screen, 1))
goto fail;
break;
case '\n':
case '\r':
if (! insert_string (screen, "\n", 1))
goto fail;
break;
case '\e':
destroy_screen (screen);
return;
case 3: /* C-c */
grub_cmdline_run (1);
goto refresh;
case 24: /* C-x */
if (! run (screen))
goto fail;
goto refresh;
case 18: /* C-r */
case 19: /* C-s */
case 20: /* C-t */
/* FIXME */
break;
default:
if (grub_isprint (c))
{
char buf[2];
buf[0] = c;
buf[1] = '\0';
if (! insert_string (screen, buf, 1))
goto fail;
}
break;
}
prev_c = c;
}
fail:
destroy_screen (screen);
grub_cls ();
grub_print_error ();
grub_errno = GRUB_ERR_NONE;
grub_xputs ("\n");
grub_printf_ (N_("Press any key to continue..."));
(void) grub_getkey ();
}
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