446 lines
13 KiB
C
446 lines
13 KiB
C
/*
|
|
* menubox.c -- implements the menu box
|
|
*
|
|
* ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
|
|
* MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcapw@cfw.com)
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/*
|
|
* Changes by Clifford Wolf (god@clifford.at)
|
|
*
|
|
* [ 1998-06-13 ]
|
|
*
|
|
* *) A bugfix for the Page-Down problem
|
|
*
|
|
* *) Formerly when I used Page Down and Page Up, the cursor would be set
|
|
* to the first position in the menu box. Now lxdialog is a bit
|
|
* smarter and works more like other menu systems (just have a look at
|
|
* it).
|
|
*
|
|
* *) Formerly if I selected something my scrolling would be broken because
|
|
* lxdialog is re-invoked by the Menuconfig shell script, can't
|
|
* remember the last scrolling position, and just sets it so that the
|
|
* cursor is at the bottom of the box. Now it writes the temporary file
|
|
* lxdialog.scrltmp which contains this information. The file is
|
|
* deleted by lxdialog if the user leaves a submenu or enters a new
|
|
* one, but it would be nice if Menuconfig could make another "rm -f"
|
|
* just to be sure. Just try it out - you will recognise a difference!
|
|
*
|
|
* [ 1998-06-14 ]
|
|
*
|
|
* *) Now lxdialog is crash-safe against broken "lxdialog.scrltmp" files
|
|
* and menus change their size on the fly.
|
|
*
|
|
* *) If for some reason the last scrolling position is not saved by
|
|
* lxdialog, it sets the scrolling so that the selected item is in the
|
|
* middle of the menu box, not at the bottom.
|
|
*
|
|
* 02 January 1999, Michael Elizabeth Chastain (mec@shout.net)
|
|
* Reset 'scroll' to 0 if the value from lxdialog.scrltmp is bogus.
|
|
* This fixes a bug in Menuconfig where using ' ' to descend into menus
|
|
* would leave mis-synchronized lxdialog.scrltmp files lying around,
|
|
* fscanf would read in 'scroll', and eventually that value would get used.
|
|
*/
|
|
|
|
#include "dialog.h"
|
|
|
|
static int menu_width, item_x;
|
|
|
|
/*
|
|
* Print menu item
|
|
*/
|
|
static void
|
|
print_item (WINDOW * win, const char *item, int choice, int selected, int hotkey)
|
|
{
|
|
int j;
|
|
char menu_item[menu_width+1];
|
|
|
|
strncpy(menu_item, item, menu_width);
|
|
menu_item[menu_width] = 0;
|
|
j = first_alpha(menu_item, "YyNnMmHh");
|
|
|
|
/* Clear 'residue' of last item */
|
|
wattrset (win, menubox_attr);
|
|
wmove (win, choice, 0);
|
|
#if OLD_NCURSES
|
|
{
|
|
int i;
|
|
for (i = 0; i < menu_width; i++)
|
|
waddch (win, ' ');
|
|
}
|
|
#else
|
|
wclrtoeol(win);
|
|
#endif
|
|
wattrset (win, selected ? item_selected_attr : item_attr);
|
|
mvwaddstr (win, choice, item_x, menu_item);
|
|
if (hotkey) {
|
|
wattrset (win, selected ? tag_key_selected_attr : tag_key_attr);
|
|
mvwaddch(win, choice, item_x+j, menu_item[j]);
|
|
}
|
|
if (selected) {
|
|
wmove (win, choice, item_x+1);
|
|
wrefresh (win);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Print the scroll indicators.
|
|
*/
|
|
static void
|
|
print_arrows (WINDOW * win, int item_no, int scroll,
|
|
int y, int x, int height)
|
|
{
|
|
int cur_y, cur_x;
|
|
|
|
getyx(win, cur_y, cur_x);
|
|
|
|
wmove(win, y, x);
|
|
|
|
if (scroll > 0) {
|
|
wattrset (win, uarrow_attr);
|
|
waddch (win, ACS_UARROW);
|
|
waddstr (win, "(-)");
|
|
}
|
|
else {
|
|
wattrset (win, menubox_attr);
|
|
waddch (win, ACS_HLINE);
|
|
waddch (win, ACS_HLINE);
|
|
waddch (win, ACS_HLINE);
|
|
waddch (win, ACS_HLINE);
|
|
}
|
|
|
|
y = y + height + 1;
|
|
wmove(win, y, x);
|
|
|
|
if ((height < item_no) && (scroll + height < item_no)) {
|
|
wattrset (win, darrow_attr);
|
|
waddch (win, ACS_DARROW);
|
|
waddstr (win, "(+)");
|
|
}
|
|
else {
|
|
wattrset (win, menubox_border_attr);
|
|
waddch (win, ACS_HLINE);
|
|
waddch (win, ACS_HLINE);
|
|
waddch (win, ACS_HLINE);
|
|
waddch (win, ACS_HLINE);
|
|
}
|
|
|
|
wmove(win, cur_y, cur_x);
|
|
}
|
|
|
|
/*
|
|
* Display the termination buttons.
|
|
*/
|
|
static void
|
|
print_buttons (WINDOW *win, int height, int width, int selected)
|
|
{
|
|
int x = width / 2 - 16;
|
|
int y = height - 2;
|
|
|
|
print_button (win, "Select", y, x, selected == 0);
|
|
print_button (win, " Exit ", y, x + 12, selected == 1);
|
|
print_button (win, " Help ", y, x + 24, selected == 2);
|
|
|
|
wmove(win, y, x+1+12*selected);
|
|
wrefresh (win);
|
|
}
|
|
|
|
/*
|
|
* Display a menu for choosing among a number of options
|
|
*/
|
|
int
|
|
dialog_menu (const char *title, const char *prompt, int height, int width,
|
|
int menu_height, const char *current, int item_no,
|
|
const char * const * items)
|
|
|
|
{
|
|
int i, j, x, y, box_x, box_y;
|
|
int key = 0, button = 0, scroll = 0, choice = 0, first_item = 0, max_choice;
|
|
WINDOW *dialog, *menu;
|
|
FILE *f;
|
|
|
|
max_choice = MIN (menu_height, item_no);
|
|
|
|
/* center dialog box on screen */
|
|
x = (COLS - width) / 2;
|
|
y = (LINES - height) / 2;
|
|
|
|
draw_shadow (stdscr, y, x, height, width);
|
|
|
|
dialog = newwin (height, width, y, x);
|
|
keypad (dialog, TRUE);
|
|
|
|
draw_box (dialog, 0, 0, height, width, dialog_attr, border_attr);
|
|
wattrset (dialog, border_attr);
|
|
mvwaddch (dialog, height - 3, 0, ACS_LTEE);
|
|
for (i = 0; i < width - 2; i++)
|
|
waddch (dialog, ACS_HLINE);
|
|
wattrset (dialog, dialog_attr);
|
|
wbkgdset (dialog, dialog_attr & A_COLOR);
|
|
waddch (dialog, ACS_RTEE);
|
|
|
|
if (title != NULL && strlen(title) >= width-2 ) {
|
|
/* truncate long title -- mec */
|
|
char * title2 = malloc(width-2+1);
|
|
memcpy( title2, title, width-2 );
|
|
title2[width-2] = '\0';
|
|
title = title2;
|
|
}
|
|
|
|
if (title != NULL) {
|
|
wattrset (dialog, title_attr);
|
|
mvwaddch (dialog, 0, (width - strlen(title))/2 - 1, ' ');
|
|
waddstr (dialog, (char *)title);
|
|
waddch (dialog, ' ');
|
|
}
|
|
|
|
wattrset (dialog, dialog_attr);
|
|
print_autowrap (dialog, prompt, width - 2, 1, 3);
|
|
|
|
menu_width = width - 6;
|
|
box_y = height - menu_height - 5;
|
|
box_x = (width - menu_width) / 2 - 1;
|
|
|
|
/* create new window for the menu */
|
|
menu = subwin (dialog, menu_height, menu_width,
|
|
y + box_y + 1, x + box_x + 1);
|
|
keypad (menu, TRUE);
|
|
|
|
/* draw a box around the menu items */
|
|
draw_box (dialog, box_y, box_x, menu_height + 2, menu_width + 2,
|
|
menubox_border_attr, menubox_attr);
|
|
|
|
/*
|
|
* Find length of longest item in order to center menu.
|
|
* Set 'choice' to default item.
|
|
*/
|
|
item_x = 0;
|
|
for (i = 0; i < item_no; i++) {
|
|
item_x = MAX (item_x, MIN(menu_width, strlen (items[i * 2 + 1]) + 2));
|
|
if (strcmp(current, items[i*2]) == 0) choice = i;
|
|
}
|
|
|
|
item_x = (menu_width - item_x) / 2;
|
|
|
|
/* get the scroll info from the temp file */
|
|
if ( (f=fopen("lxdialog.scrltmp","r")) != NULL ) {
|
|
if ( (fscanf(f,"%d\n",&scroll) == 1) && (scroll <= choice) &&
|
|
(scroll+max_choice > choice) && (scroll >= 0) &&
|
|
(scroll+max_choice <= item_no) ) {
|
|
first_item = scroll;
|
|
choice = choice - scroll;
|
|
fclose(f);
|
|
} else {
|
|
scroll=0;
|
|
remove("lxdialog.scrltmp");
|
|
fclose(f);
|
|
f=NULL;
|
|
}
|
|
}
|
|
if ( (choice >= max_choice) || (f==NULL && choice >= max_choice/2) ) {
|
|
if (choice >= item_no-max_choice/2)
|
|
scroll = first_item = item_no-max_choice;
|
|
else
|
|
scroll = first_item = choice - max_choice/2;
|
|
choice = choice - scroll;
|
|
}
|
|
|
|
/* Print the menu */
|
|
for (i=0; i < max_choice; i++) {
|
|
print_item (menu, items[(first_item + i) * 2 + 1], i, i == choice,
|
|
(items[(first_item + i)*2][0] != ':'));
|
|
}
|
|
|
|
wnoutrefresh (menu);
|
|
|
|
print_arrows(dialog, item_no, scroll,
|
|
box_y, box_x+item_x+1, menu_height);
|
|
|
|
print_buttons (dialog, height, width, 0);
|
|
wmove (menu, choice, item_x+1);
|
|
wrefresh (menu);
|
|
|
|
while (key != ESC) {
|
|
key = wgetch(menu);
|
|
|
|
if (key < 256 && isalpha(key)) key = tolower(key);
|
|
|
|
if (strchr("ynmh", key))
|
|
i = max_choice;
|
|
else {
|
|
for (i = choice+1; i < max_choice; i++) {
|
|
j = first_alpha(items[(scroll+i)*2+1], "YyNnMmHh");
|
|
if (key == tolower(items[(scroll+i)*2+1][j]))
|
|
break;
|
|
}
|
|
if (i == max_choice)
|
|
for (i = 0; i < max_choice; i++) {
|
|
j = first_alpha(items[(scroll+i)*2+1], "YyNnMmHh");
|
|
if (key == tolower(items[(scroll+i)*2+1][j]))
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (i < max_choice ||
|
|
key == KEY_UP || key == KEY_DOWN ||
|
|
key == '-' || key == '+' ||
|
|
key == KEY_PPAGE || key == KEY_NPAGE) {
|
|
|
|
print_item (menu, items[(scroll+choice)*2+1], choice, FALSE,
|
|
(items[(scroll+choice)*2][0] != ':'));
|
|
|
|
if (key == KEY_UP || key == '-') {
|
|
if (choice < 2 && scroll) {
|
|
/* Scroll menu down */
|
|
scrollok (menu, TRUE);
|
|
wscrl (menu, -1);
|
|
scrollok (menu, FALSE);
|
|
|
|
scroll--;
|
|
|
|
print_item (menu, items[scroll * 2 + 1], 0, FALSE,
|
|
(items[scroll*2][0] != ':'));
|
|
} else
|
|
choice = MAX(choice - 1, 0);
|
|
|
|
} else if (key == KEY_DOWN || key == '+') {
|
|
|
|
print_item (menu, items[(scroll+choice)*2+1], choice, FALSE,
|
|
(items[(scroll+choice)*2][0] != ':'));
|
|
|
|
if ((choice > max_choice-3) &&
|
|
(scroll + max_choice < item_no)
|
|
) {
|
|
/* Scroll menu up */
|
|
scrollok (menu, TRUE);
|
|
wscrl (menu, 1);
|
|
scrollok (menu, FALSE);
|
|
|
|
scroll++;
|
|
|
|
print_item (menu, items[(scroll+max_choice-1)*2+1],
|
|
max_choice-1, FALSE,
|
|
(items[(scroll+max_choice-1)*2][0] != ':'));
|
|
} else
|
|
choice = MIN(choice+1, max_choice-1);
|
|
|
|
} else if (key == KEY_PPAGE) {
|
|
scrollok (menu, TRUE);
|
|
for (i=0; (i < max_choice); i++) {
|
|
if (scroll > 0) {
|
|
wscrl (menu, -1);
|
|
scroll--;
|
|
print_item (menu, items[scroll * 2 + 1], 0, FALSE,
|
|
(items[scroll*2][0] != ':'));
|
|
} else {
|
|
if (choice > 0)
|
|
choice--;
|
|
}
|
|
}
|
|
scrollok (menu, FALSE);
|
|
|
|
} else if (key == KEY_NPAGE) {
|
|
for (i=0; (i < max_choice); i++) {
|
|
if (scroll+max_choice < item_no) {
|
|
scrollok (menu, TRUE);
|
|
wscrl (menu, 1);
|
|
scrollok (menu, FALSE);
|
|
scroll++;
|
|
print_item (menu, items[(scroll+max_choice-1)*2+1],
|
|
max_choice-1, FALSE,
|
|
(items[(scroll+max_choice-1)*2][0] != ':'));
|
|
} else {
|
|
if (choice+1 < max_choice)
|
|
choice++;
|
|
}
|
|
}
|
|
|
|
} else
|
|
choice = i;
|
|
|
|
print_item (menu, items[(scroll+choice)*2+1], choice, TRUE,
|
|
(items[(scroll+choice)*2][0] != ':'));
|
|
|
|
print_arrows(dialog, item_no, scroll,
|
|
box_y, box_x+item_x+1, menu_height);
|
|
|
|
wnoutrefresh (dialog);
|
|
wrefresh (menu);
|
|
|
|
continue; /* wait for another key press */
|
|
}
|
|
|
|
switch (key) {
|
|
case KEY_LEFT:
|
|
case TAB:
|
|
case KEY_RIGHT:
|
|
button = ((key == KEY_LEFT ? --button : ++button) < 0)
|
|
? 2 : (button > 2 ? 0 : button);
|
|
|
|
print_buttons(dialog, height, width, button);
|
|
wrefresh (menu);
|
|
break;
|
|
case ' ':
|
|
case 's':
|
|
case 'y':
|
|
case 'n':
|
|
case 'm':
|
|
case '/':
|
|
/* save scroll info */
|
|
if ( (f=fopen("lxdialog.scrltmp","w")) != NULL ) {
|
|
fprintf(f,"%d\n",scroll);
|
|
fclose(f);
|
|
}
|
|
delwin (dialog);
|
|
fprintf(stderr, "%s\n", items[(scroll + choice) * 2]);
|
|
switch (key) {
|
|
case 's': return 3;
|
|
case 'y': return 3;
|
|
case 'n': return 4;
|
|
case 'm': return 5;
|
|
case ' ': return 6;
|
|
case '/': return 7;
|
|
}
|
|
return 0;
|
|
case 'h':
|
|
case '?':
|
|
button = 2;
|
|
case '\n':
|
|
delwin (dialog);
|
|
if (button == 2)
|
|
fprintf(stderr, "%s \"%s\"\n",
|
|
items[(scroll + choice) * 2],
|
|
items[(scroll + choice) * 2 + 1] +
|
|
first_alpha(items[(scroll + choice) * 2 + 1],""));
|
|
else
|
|
fprintf(stderr, "%s\n", items[(scroll + choice) * 2]);
|
|
|
|
remove("lxdialog.scrltmp");
|
|
return button;
|
|
case 'e':
|
|
case 'x':
|
|
key = ESC;
|
|
case ESC:
|
|
break;
|
|
}
|
|
}
|
|
|
|
delwin (dialog);
|
|
remove("lxdialog.scrltmp");
|
|
return -1; /* ESC pressed */
|
|
}
|