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/*
* 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 do_print_item(WINDOW * win, const char *item, int choice,
int selected, int hotkey)
{
int j;
char *menu_item = malloc(menu_width + 1);
strncpy(menu_item, item, menu_width - item_x);
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);
}
free(menu_item);
wrefresh(win);
}
#define print_item(index, choice, selected) \
do {\
int hotkey = (items[(index) * 2][0] != ':'); \
do_print_item(menu, items[(index) * 2 + 1], choice, selected, hotkey); \
} while (0)
/*
* 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);
wrefresh(win);
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);
wrefresh(win);
}
/*
* 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);
}
/* scroll up n lines (n may be negative) */
static void do_scroll(WINDOW *win, int *scroll, int n)
{
/* Scroll menu up */
scrollok(win, TRUE);
wscrl(win, n);
scrollok(win, FALSE);
*scroll = *scroll + n;
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;
int 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);
print_title(dialog, title, width);
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);
item_x = (menu_width - 70) / 2;
/* Set choice to default item */
for (i = 0; i < item_no; i++)
if (strcmp(current, items[i * 2]) == 0)
choice = i;
/* 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_choic
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