support/kconfig/lxdialog/menubox.c - buildroot - Git at Google

 /*
  *  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 line_y,
 			  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 - item_x] = '\0';
 	j = first_alpha(menu_item, "YyNnMmHh");

 	/* Clear 'residue' of last item */
 	wattrset(win, dlg.menubox.atr);
 	wmove(win, line_y, 0);
 #if OLD_NCURSES
 	{
 		int i;
 		for (i = 0; i < menu_width; i++)
 			waddch(win, ' ');
 	}
 #else
 	wclrtoeol(win);
 #endif
 	wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
 	mvwaddstr(win, line_y, item_x, menu_item);
 	if (hotkey) {
 		wattrset(win, selected ? dlg.tag_key_selected.atr
 			 : dlg.tag_key.atr);
 		mvwaddch(win, line_y, item_x + j, menu_item[j]);
 	}
 	if (selected) {
 		wmove(win, line_y, item_x + 1);
 	}
 	free(menu_item);
 	wrefresh(win);
 }

 #define print_item(index, choice, selected)				\
 do {									\
 	item_set(index);						\
 	do_print_item(menu, item_str(), choice, selected, !item_is_tag(':')); \
 } 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, dlg.uarrow.atr);
 		waddch(win, ACS_UARROW);
 		waddstr(win, "(-)");
 	} else {
 		wattrset(win, dlg.menubox.atr);
 		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, dlg.darrow.atr);
 		waddch(win, ACS_DARROW);
 		waddstr(win, "(+)");
 	} else {
 		wattrset(win, dlg.menubox_border.atr);
 		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 - 28;
 	int y = height - 2;

 	print_button(win, gettext("Select"), y, x, selected == 0);
 	print_button(win, gettext(" Exit "), y, x + 12, selected == 1);
 	print_button(win, gettext(" Help "), y, x + 24, selected == 2);
 	print_button(win, gettext(" Save "), y, x + 36, selected == 3);
 	print_button(win, gettext(" Load "), y, x + 48, selected == 4);

 	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,
 		const void *selected, int *s_scroll)
 {
 	int i, j, x, y, box_x, box_y;
 	int height, width, menu_height;
 	int key = 0, button = 0, scroll = 0, choice = 0;
 	int first_item =  0, max_choice;
 	WINDOW *dialog, *menu;

 do_resize:
 	height = getmaxy(stdscr);
 	width = getmaxx(stdscr);
 	if (height < MENUBOX_HEIGTH_MIN || width < MENUBOX_WIDTH_MIN)
 		return -ERRDISPLAYTOOSMALL;

 	height -= 4;
 	width  -= 5;
 	menu_height = height - 10;

 	max_choice = MIN(menu_height, item_count());

 	/* center dialog box on screen */
 	x = (getmaxx(stdscr) - width) / 2;
 	y = (getmaxy(stdscr) - 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,
 		 dlg.dialog.atr, dlg.border.atr);
 	wattrset(dialog, dlg.border.atr);
 	mvwaddch(dialog, height - 3, 0, ACS_LTEE);
 	for (i = 0; i < width - 2; i++)
 		waddch(dialog, ACS_HLINE);
 	wattrset(dialog, dlg.dialog.atr);
 	wbkgdset(dialog, dlg.dialog.atr & A_COLOR);
 	waddch(dialog, ACS_RTEE);

 	print_title(dialog, title, width);

 	wattrset(dialog, dlg.dialog.atr);
 	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,
 		 dlg.menubox_border.atr, dlg.menubox.atr);

 	if (menu_width >= 80)
 		item_x = (menu_width - 70) / 2;
 	else
 		item_x = 4;

 	/* Set choice to default item */
 	item_foreach()
 		if (selected && (selected == item_data()))
 			choice = item_n();
 	/* get the saved scroll info */
 	scroll = *s_scroll;
 	if ((scroll <= choice) && (scroll + max_choice > choice) &&
 	   (scroll >= 0) && (scroll + max_choice <= item_count())) {
 		first_item = scroll;
 		choice = choice - scroll;
 	} else {
 		scroll = 0;
 	}
 	if ((choice >= max_choice)) {
 		if (choice >= item_count() - max_choice / 2)
 			scroll = first_item = item_count() - 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(first_item + i, i, i == choice);
 	}

 	wnoutrefresh(menu);

 	print_arrows(dialog, item_count(), 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 != 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++) {
 				item_set(scroll + i);
 				j = first_alpha(item_str(), "YyNnMmHh");
 				if (key == tolower(item_str()[j]))
 					break;
 			}
 			if (i == max_choice)
 				for (i = 0; i < max_choice; i++) {
 					item_set(scroll + i);
 					j = first_alpha(item_str(), "YyNnMmHh");
 					if (key == tolower(item_str()[j]))
 						break;
 				}
 		}

 		if (item_count() != 0 &&
 		    (i < max_choice ||
 		     key == KEY_UP || key == KEY_DOWN ||
 		     key == '-' || key == '+' ||
 		     key == KEY_PPAGE || key == KEY_NPAGE)) {
 			/* Remove highligt of current item */
 			print_item(scroll + choice, choice, FALSE);

 			if (key == KEY_UP || key == '-') {
 				if (choice < 2 && scroll) {
 					/* Scroll menu down */
 					do_scroll(menu, &scroll, -1);

 					print_item(scroll, 0, FALSE);
 				} else
 					choice = MAX(choice - 1, 0);

 			} else if (key == KEY_DOWN || key == '+') {
 				print_item(scroll+choice, choice, FALSE);

 				if ((choice > max_choice - 3) &&
 				    (scroll + max_choice < item_count())) {
 					/* Scroll menu up */
 					do_scroll(menu, &scroll, 1);

 					print_item(scroll+max_choice - 1,
 						   max_choice - 1, FALSE);
 				} 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) {
 						do_scroll(menu, &scroll, -1);
 						print_item(scroll, 0, FALSE);
 					} else {
 						if (choice > 0)
 							choice--;
 					}
 				}

 			} else if (key == KEY_NPAGE) {
 				for (i = 0; (i < max_choice); i++) {
 					if (scroll + max_choice < item_count()) {
 						do_scroll(menu, &scroll, 1);
 						print_item(scroll+max_choice-1,
 							   max_choice - 1, FALSE);
 					} else {
 						if (choice + 1 < max_choice)
 							choice++;
 					}
 				}
 			} else
 				choice = i;

 			print_item(scroll + choice, choice, TRUE);

 			print_arrows(dialog, item_count(), 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)
 			    ? 4 : (button > 4 ? 0 : button);

 			print_buttons(dialog, height, width, button);
 			wrefresh(menu);
 			break;
 		case ' ':
 		case 's':
 		case 'y':
 		case 'n':
 		case 'm':
 		case '/':
 		case 'h':
 		case '?':
 		case 'z':
 		case '\n':
 			/* save scroll info */
 			*s_scroll = scroll;
 			delwin(menu);
 			delwin(dialog);
 			item_set(scroll + choice);
 			item_set_selected(1);
 			switch (key) {
 			case 'h':
 			case '?':
 				return 2;
 			case 's':
 			case 'y':
 				return 5;
 			case 'n':
 				return 6;
 			case 'm':
 				return 7;
 			case ' ':
 				return 8;
 			case '/':
 				return 9;
 			case 'z':
 				return 10;
 			case '\n':
 				return button;
 			}
 			return 0;
 		case 'e':
 		case 'x':
 			key = KEY_ESC;
 			break;
 		case KEY_ESC:
 			key = on_key_esc(menu);
 			break;
 		case KEY_RESIZE:
 			on_key_resize();
 			delwin(menu);
 			delwin(dialog);
 			goto do_resize;
 		}
 	}
 	delwin(menu);
 	delwin(dialog);
 	return key;		/* ESC pressed */
 }
	/*
	* 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 line_y,
	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 - item_x] = '\0';
	j = first_alpha(menu_item, "YyNnMmHh");

	/* Clear 'residue' of last item */
	wattrset(win, dlg.menubox.atr);
	wmove(win, line_y, 0);
	#if OLD_NCURSES
	{
	int i;
	for (i = 0; i < menu_width; i++)
	waddch(win, ' ');
	}
	#else
	wclrtoeol(win);
	#endif
	wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
	mvwaddstr(win, line_y, item_x, menu_item);
	if (hotkey) {
	wattrset(win, selected ? dlg.tag_key_selected.atr
	: dlg.tag_key.atr);
	mvwaddch(win, line_y, item_x + j, menu_item[j]);
	}
	if (selected) {
	wmove(win, line_y, item_x + 1);
	}
	free(menu_item);
	wrefresh(win);
	}

	#define print_item(index, choice, selected) \
	do { \
	item_set(index); \
	do_print_item(menu, item_str(), choice, selected, !item_is_tag(':')); \
	} 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, dlg.uarrow.atr);
	waddch(win, ACS_UARROW);
	waddstr(win, "(-)");
	} else {
	wattrset(win, dlg.menubox.atr);
	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, dlg.darrow.atr);
	waddch(win, ACS_DARROW);
	waddstr(win, "(+)");
	} else {
	wattrset(win, dlg.menubox_border.atr);
	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 - 28;
	int y = height - 2;

	print_button(win, gettext("Select"), y, x, selected == 0);
	print_button(win, gettext(" Exit "), y, x + 12, selected == 1);
	print_button(win, gettext(" Help "), y, x + 24, selected == 2);
	print_button(win, gettext(" Save "), y, x + 36, selected == 3);
	print_button(win, gettext(" Load "), y, x + 48, selected == 4);

	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,
	const void selected, int s_scroll)
	{
	int i, j, x, y, box_x, box_y;
	int height, width, menu_height;
	int key = 0, button = 0, scroll = 0, choice = 0;
	int first_item = 0, max_choice;
	WINDOW dialog, menu;

	do_resize:
	height = getmaxy(stdscr);
	width = getmaxx(stdscr);
	if (height < MENUBOX_HEIGTH_MIN \|\| width < MENUBOX_WIDTH_MIN)
	return -ERRDISPLAYTOOSMALL;

	height -= 4;
	width -= 5;
	menu_height = height - 10;

	max_choice = MIN(menu_height, item_count());

	/* center dialog box on screen */
	x = (getmaxx(stdscr) - width) / 2;
	y = (getmaxy(stdscr) - 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,
	dlg.dialog.atr, dlg.border.atr);
	wattrset(dialog, dlg.border.atr);
	mvwaddch(dialog, height - 3, 0, ACS_LTEE);
	for (i = 0; i < width - 2; i++)
	waddch(dialog, ACS_HLINE);
	wattrset(dialog, dlg.dialog.atr);
	wbkgdset(dialog, dlg.dialog.atr & A_COLOR);
	waddch(dialog, ACS_RTEE);

	print_title(dialog, title, width);

	wattrset(dialog, dlg.dialog.atr);
	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,
	dlg.menubox_border.atr, dlg.menubox.atr);

	if (menu_width >= 80)
	item_x = (menu_width - 70) / 2;
	else
	item_x = 4;

	/* Set choice to default item */
	item_foreach()
	if (selected && (selected == item_data()))
	choice = item_n();
	/* get the saved scroll info */
	scroll = *s_scroll;
	if ((scroll <= choice) && (scroll + max_choice > choice) &&
	(scroll >= 0) && (scroll + max_choice <= item_count())) {
	first_item = scroll;
	choice = choice - scroll;
	} else {
	scroll = 0;
	}
	if ((choice >= max_choice)) {
	if (choice >= item_count() - max_choice / 2)
	scroll = first_item = item_count() - 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(first_item + i, i, i == choice);
	}

	wnoutrefresh(menu);

	print_arrows(dialog, item_count(), 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 != 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++) {
	item_set(scroll + i);
	j = first_alpha(item_str(), "YyNnMmHh");
	if (key == tolower(item_str()[j]))
	break;
	}
	if (i == max_choice)
	for (i = 0; i < max_choice; i++) {
	item_set(scroll + i);
	j = first_alpha(item_str(), "YyNnMmHh");
	if (key == tolower(item_str()[j]))
	break;
	}
	}

	if (item_count() != 0 &&
	(i < max_choice \|\|
	key == KEY_UP \|\| key == KEY_DOWN \|\|
	key == '-' \|\| key == '+' \|\|
	key == KEY_PPAGE \|\| key == KEY_NPAGE)) {
	/* Remove highligt of current item */
	print_item(scroll + choice, choice, FALSE);

	if (key == KEY_UP \|\| key == '-') {
	if (choice < 2 && scroll) {
	/* Scroll menu down */
	do_scroll(menu, &scroll, -1);

	print_item(scroll, 0, FALSE);
	} else
	choice = MAX(choice - 1, 0);

	} else if (key == KEY_DOWN \|\| key == '+') {
	print_item(scroll+choice, choice, FALSE);

	if ((choice > max_choice - 3) &&
	(scroll + max_choice < item_count())) {
	/* Scroll menu up */
	do_scroll(menu, &scroll, 1);

	print_item(scroll+max_choice - 1,
	max_choice - 1, FALSE);
	} 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) {
	do_scroll(menu, &scroll, -1);
	print_item(scroll, 0, FALSE);
	} else {
	if (choice > 0)
	choice--;
	}
	}

	} else if (key == KEY_NPAGE) {
	for (i = 0; (i < max_choice); i++) {
	if (scroll + max_choice < item_count()) {
	do_scroll(menu, &scroll, 1);
	print_item(scroll+max_choice-1,
	max_choice - 1, FALSE);
	} else {
	if (choice + 1 < max_choice)
	choice++;
	}
	}
	} else
	choice = i;

	print_item(scroll + choice, choice, TRUE);

	print_arrows(dialog, item_count(), 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)
	? 4 : (button > 4 ? 0 : button);

	print_buttons(dialog, height, width, button);
	wrefresh(menu);
	break;
	case ' ':
	case 's':
	case 'y':
	case 'n':
	case 'm':
	case '/':
	case 'h':
	case '?':
	case 'z':
	case '\n':
	/* save scroll info */
	*s_scroll = scroll;
	delwin(menu);
	delwin(dialog);
	item_set(scroll + choice);
	item_set_selected(1);
	switch (key) {
	case 'h':
	case '?':
	return 2;
	case 's':
	case 'y':
	return 5;
	case 'n':
	return 6;
	case 'm':
	return 7;
	case ' ':
	return 8;
	case '/':
	return 9;
	case 'z':
	return 10;
	case '\n':
	return button;
	}
	return 0;
	case 'e':
	case 'x':
	key = KEY_ESC;
	break;
	case KEY_ESC:
	key = on_key_esc(menu);
	break;
	case KEY_RESIZE:
	on_key_resize();
	delwin(menu);
	delwin(dialog);
	goto do_resize;
	}
	}
	delwin(menu);
	delwin(dialog);
	return key; /* ESC pressed */
	}