scripts/kconfig/lxdialog/checklist.c - kernel/lockdown - Git at Google

 /*
  *  checklist.c -- implements the checklist box
  *
  *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
  *     Stuart Herbert - S.Herbert@sheffield.ac.uk: radiolist extension
  *     Alessandro Rubini - rubini@ipvvis.unipv.it: merged the two
  *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@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.
  */

 #include "dialog.h"

 static int list_width, check_x, item_x;

 /*
  * Print list item
  */
 static void print_item(WINDOW * win, int choice, int selected)
 {
 	int i;
 	char *list_item = malloc(list_width + 1);

 	strncpy(list_item, item_str(), list_width - item_x);
 	list_item[list_width - item_x] = '\0';

 	/* Clear 'residue' of last item */
 	wattrset(win, dlg.menubox.atr);
 	wmove(win, choice, 0);
 	for (i = 0; i < list_width; i++)
 		waddch(win, ' ');

 	wmove(win, choice, check_x);
 	wattrset(win, selected ? dlg.check_selected.atr
 		 : dlg.check.atr);
 	if (!item_is_tag(':'))
 		wprintw(win, "(%c)", item_is_tag('X') ? 'X' : ' ');

 	wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr);
 	mvwaddch(win, choice, item_x, list_item[0]);
 	wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
 	waddstr(win, list_item + 1);
 	if (selected) {
 		wmove(win, choice, check_x + 1);
 		wrefresh(win);
 	}
 	free(list_item);
 }

 /*
  * Print the scroll indicators.
  */
 static void print_arrows(WINDOW * win, int choice, int item_no, int scroll,
 	     int y, int x, int height)
 {
 	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);

 	if ((height < item_no) && (scroll + choice < item_no - 1)) {
 		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);
 	}
 }

 /*
  *  Display the termination buttons
  */
 static void print_buttons(WINDOW * dialog, int height, int width, int selected)
 {
 	int x = width / 2 - 11;
 	int y = height - 2;

 	print_button(dialog, gettext("Select"), y, x, selected == 0);
 	print_button(dialog, gettext(" Help "), y, x + 14, selected == 1);

 	wmove(dialog, y, x + 1 + 14 * selected);
 	wrefresh(dialog);
 }

 /*
  * Display a dialog box with a list of options that can be turned on or off
  * in the style of radiolist (only one option turned on at a time).
  */
 int dialog_checklist(const char *title, const char *prompt, int height,
 		     int width, int list_height)
 {
 	int i, x, y, box_x, box_y;
 	int key = 0, button = 0, choice = 0, scroll = 0, max_choice;
 	WINDOW *dialog, *list;

 	/* which item to highlight */
 	item_foreach() {
 		if (item_is_tag('X'))
 			choice = item_n();
 		if (item_is_selected()) {
 			choice = item_n();
 			break;
 		}
 	}

 do_resize:
 	if (getmaxy(stdscr) < (height + CHECKLIST_HEIGTH_MIN))
 		return -ERRDISPLAYTOOSMALL;
 	if (getmaxx(stdscr) < (width + CHECKLIST_WIDTH_MIN))
 		return -ERRDISPLAYTOOSMALL;

 	max_choice = MIN(list_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);
 	waddch(dialog, ACS_RTEE);

 	print_title(dialog, title, width);

 	wattrset(dialog, dlg.dialog.atr);
 	print_autowrap(dialog, prompt, width - 2, 1, 3);

 	list_width = width - 6;
 	box_y = height - list_height - 5;
 	box_x = (width - list_width) / 2 - 1;

 	/* create new window for the list */
 	list = subwin(dialog, list_height, list_width, y + box_y + 1,
 	              x + box_x + 1);

 	keypad(list, TRUE);

 	/* draw a box around the list items */
 	draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
 	         dlg.menubox_border.atr, dlg.menubox.atr);

 	/* Find length of longest item in order to center checklist */
 	check_x = 0;
 	item_foreach()
 		check_x = MAX(check_x, strlen(item_str()) + 4);
 	check_x = MIN(check_x, list_width);

 	check_x = (list_width - check_x) / 2;
 	item_x = check_x + 4;

 	if (choice >= list_height) {
 		scroll = choice - list_height + 1;
 		choice -= scroll;
 	}

 	/* Print the list */
 	for (i = 0; i < max_choice; i++) {
 		item_set(scroll + i);
 		print_item(list, i, i == choice);
 	}

 	print_arrows(dialog, choice, item_count(), scroll,
 		     box_y, box_x + check_x + 5, list_height);

 	print_buttons(dialog, height, width, 0);

 	wnoutrefresh(dialog);
 	wnoutrefresh(list);
 	doupdate();

 	while (key != KEY_ESC) {
 		key = wgetch(dialog);

 		for (i = 0; i < max_choice; i++) {
 			item_set(i + scroll);
 			if (toupper(key) == toupper(item_str()[0]))
 				break;
 		}

 		if (i < max_choice || key == KEY_UP || key == KEY_DOWN ||
 		    key == '+' || key == '-') {
 			if (key == KEY_UP || key == '-') {
 				if (!choice) {
 					if (!scroll)
 						continue;
 					/* Scroll list down */
 					if (list_height > 1) {
 						/* De-highlight current first item */
 						item_set(scroll);
 						print_item(list, 0, FALSE);
 						scrollok(list, TRUE);
 						wscrl(list, -1);
 						scrollok(list, FALSE);
 					}
 					scroll--;
 					item_set(scroll);
 					print_item(list, 0, TRUE);
 					print_arrows(dialog, choice, item_count(),
 						     scroll, box_y, box_x + check_x + 5, list_height);

 					wnoutrefresh(dialog);
 					wrefresh(list);

 					continue;	/* wait for another key press */
 				} else
 					i = choice - 1;
 			} else if (key == KEY_DOWN || key == '+') {
 				if (choice == max_choice - 1) {
 					if (scroll + choice >= item_count() - 1)
 						continue;
 					/* Scroll list up */
 					if (list_height > 1) {
 						/* De-highlight current last item before scrolling up */
 						item_set(scroll + max_choice - 1);
 						print_item(list,
 							    max_choice - 1,
 							    FALSE);
 						scrollok(list, TRUE);
 						wscrl(list, 1);
 						scrollok(list, FALSE);
 					}
 					scroll++;
 					item_set(scroll + max_choice - 1);
 					print_item(list, max_choice - 1, TRUE);

 					print_arrows(dialog, choice, item_count(),
 						     scroll, box_y, box_x + check_x + 5, list_height);

 					wnoutrefresh(dialog);
 					wrefresh(list);

 					continue;	/* wait for another key press */
 				} else
 					i = choice + 1;
 			}
 			if (i != choice) {
 				/* De-highlight current item */
 				item_set(scroll + choice);
 				print_item(list, choice, FALSE);
 				/* Highlight new item */
 				choice = i;
 				item_set(scroll + choice);
 				print_item(list, choice, TRUE);
 				wnoutrefresh(dialog);
 				wrefresh(list);
 			}
 			continue;	/* wait for another key press */
 		}
 		switch (key) {
 		case 'H':
 		case 'h':
 		case '?':
 			button = 1;
 			/* fall-through */
 		case 'S':
 		case 's':
 		case ' ':
 		case '\n':
 			item_foreach()
 				item_set_selected(0);
 			item_set(scroll + choice);
 			item_set_selected(1);
 			delwin(list);
 			delwin(dialog);
 			return button;
 		case TAB:
 		case KEY_LEFT:
 		case KEY_RIGHT:
 			button = ((key == KEY_LEFT ? --button : ++button) < 0)
 			    ? 1 : (button > 1 ? 0 : button);

 			print_buttons(dialog, height, width, button);
 			wrefresh(dialog);
 			break;
 		case 'X':
 		case 'x':
 			key = KEY_ESC;
 			break;
 		case KEY_ESC:
 			key = on_key_esc(dialog);
 			break;
 		case KEY_RESIZE:
 			delwin(list);
 			delwin(dialog);
 			on_key_resize();
 			goto do_resize;
 		}

 		/* Now, update everything... */
 		doupdate();
 	}
 	delwin(list);
 	delwin(dialog);
 	return key;		/* ESC pressed */
 }
	/*
	* checklist.c -- implements the checklist box
	*
	* ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
	* Stuart Herbert - S.Herbert@sheffield.ac.uk: radiolist extension
	* Alessandro Rubini - rubini@ipvvis.unipv.it: merged the two
	* MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@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.
	*/

	#include "dialog.h"

	static int list_width, check_x, item_x;

	/*
	* Print list item
	*/
	static void print_item(WINDOW * win, int choice, int selected)
	{
	int i;
	char *list_item = malloc(list_width + 1);

	strncpy(list_item, item_str(), list_width - item_x);
	list_item[list_width - item_x] = '\0';

	/* Clear 'residue' of last item */
	wattrset(win, dlg.menubox.atr);
	wmove(win, choice, 0);
	for (i = 0; i < list_width; i++)
	waddch(win, ' ');

	wmove(win, choice, check_x);
	wattrset(win, selected ? dlg.check_selected.atr
	: dlg.check.atr);
	if (!item_is_tag(':'))
	wprintw(win, "(%c)", item_is_tag('X') ? 'X' : ' ');

	wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr);
	mvwaddch(win, choice, item_x, list_item[0]);
	wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
	waddstr(win, list_item + 1);
	if (selected) {
	wmove(win, choice, check_x + 1);
	wrefresh(win);
	}
	free(list_item);
	}

	/*
	* Print the scroll indicators.
	*/
	static void print_arrows(WINDOW * win, int choice, int item_no, int scroll,
	int y, int x, int height)
	{
	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);

	if ((height < item_no) && (scroll + choice < item_no - 1)) {
	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);
	}
	}

	/*
	* Display the termination buttons
	*/
	static void print_buttons(WINDOW * dialog, int height, int width, int selected)
	{
	int x = width / 2 - 11;
	int y = height - 2;

	print_button(dialog, gettext("Select"), y, x, selected == 0);
	print_button(dialog, gettext(" Help "), y, x + 14, selected == 1);

	wmove(dialog, y, x + 1 + 14 * selected);
	wrefresh(dialog);
	}

	/*
	* Display a dialog box with a list of options that can be turned on or off
	* in the style of radiolist (only one option turned on at a time).
	*/
	int dialog_checklist(const char title, const char prompt, int height,
	int width, int list_height)
	{
	int i, x, y, box_x, box_y;
	int key = 0, button = 0, choice = 0, scroll = 0, max_choice;
	WINDOW dialog, list;

	/* which item to highlight */
	item_foreach() {
	if (item_is_tag('X'))
	choice = item_n();
	if (item_is_selected()) {
	choice = item_n();
	break;
	}
	}

	do_resize:
	if (getmaxy(stdscr) < (height + CHECKLIST_HEIGTH_MIN))
	return -ERRDISPLAYTOOSMALL;
	if (getmaxx(stdscr) < (width + CHECKLIST_WIDTH_MIN))
	return -ERRDISPLAYTOOSMALL;

	max_choice = MIN(list_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);
	waddch(dialog, ACS_RTEE);

	print_title(dialog, title, width);

	wattrset(dialog, dlg.dialog.atr);
	print_autowrap(dialog, prompt, width - 2, 1, 3);

	list_width = width - 6;
	box_y = height - list_height - 5;
	box_x = (width - list_width) / 2 - 1;

	/* create new window for the list */
	list = subwin(dialog, list_height, list_width, y + box_y + 1,
	x + box_x + 1);

	keypad(list, TRUE);

	/* draw a box around the list items */
	draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
	dlg.menubox_border.atr, dlg.menubox.atr);

	/* Find length of longest item in order to center checklist */
	check_x = 0;
	item_foreach()
	check_x = MAX(check_x, strlen(item_str()) + 4);
	check_x = MIN(check_x, list_width);

	check_x = (list_width - check_x) / 2;
	item_x = check_x + 4;

	if (choice >= list_height) {
	scroll = choice - list_height + 1;
	choice -= scroll;
	}

	/* Print the list */
	for (i = 0; i < max_choice; i++) {
	item_set(scroll + i);
	print_item(list, i, i == choice);
	}

	print_arrows(dialog, choice, item_count(), scroll,
	box_y, box_x + check_x + 5, list_height);

	print_buttons(dialog, height, width, 0);

	wnoutrefresh(dialog);
	wnoutrefresh(list);
	doupdate();

	while (key != KEY_ESC) {
	key = wgetch(dialog);

	for (i = 0; i < max_choice; i++) {
	item_set(i + scroll);
	if (toupper(key) == toupper(item_str()[0]))
	break;
	}

	if (i < max_choice \|\| key == KEY_UP \|\| key == KEY_DOWN \|\|
	key == '+' \|\| key == '-') {
	if (key == KEY_UP \|\| key == '-') {
	if (!choice) {
	if (!scroll)
	continue;
	/* Scroll list down */
	if (list_height > 1) {
	/* De-highlight current first item */
	item_set(scroll);
	print_item(list, 0, FALSE);
	scrollok(list, TRUE);
	wscrl(list, -1);
	scrollok(list, FALSE);
	}
	scroll--;
	item_set(scroll);
	print_item(list, 0, TRUE);
	print_arrows(dialog, choice, item_count(),
	scroll, box_y, box_x + check_x + 5, list_height);

	wnoutrefresh(dialog);
	wrefresh(list);

	continue; /* wait for another key press */
	} else
	i = choice - 1;
	} else if (key == KEY_DOWN \|\| key == '+') {
	if (choice == max_choice - 1) {
	if (scroll + choice >= item_count() - 1)
	continue;
	/* Scroll list up */
	if (list_height > 1) {
	/* De-highlight current last item before scrolling up */
	item_set(scroll + max_choice - 1);
	print_item(list,
	max_choice - 1,
	FALSE);
	scrollok(list, TRUE);
	wscrl(list, 1);
	scrollok(list, FALSE);
	}
	scroll++;
	item_set(scroll + max_choice - 1);
	print_item(list, max_choice - 1, TRUE);

	print_arrows(dialog, choice, item_count(),
	scroll, box_y, box_x + check_x + 5, list_height);

	wnoutrefresh(dialog);
	wrefresh(list);

	continue; /* wait for another key press */
	} else
	i = choice + 1;
	}
	if (i != choice) {
	/* De-highlight current item */
	item_set(scroll + choice);
	print_item(list, choice, FALSE);
	/* Highlight new item */
	choice = i;
	item_set(scroll + choice);
	print_item(list, choice, TRUE);
	wnoutrefresh(dialog);
	wrefresh(list);
	}
	continue; /* wait for another key press */
	}
	switch (key) {
	case 'H':
	case 'h':
	case '?':
	button = 1;
	/* fall-through */
	case 'S':
	case 's':
	case ' ':
	case '\n':
	item_foreach()
	item_set_selected(0);
	item_set(scroll + choice);
	item_set_selected(1);
	delwin(list);
	delwin(dialog);
	return button;
	case TAB:
	case KEY_LEFT:
	case KEY_RIGHT:
	button = ((key == KEY_LEFT ? --button : ++button) < 0)
	? 1 : (button > 1 ? 0 : button);

	print_buttons(dialog, height, width, button);
	wrefresh(dialog);
	break;
	case 'X':
	case 'x':
	key = KEY_ESC;
	break;
	case KEY_ESC:
	key = on_key_esc(dialog);
	break;
	case KEY_RESIZE:
	delwin(list);
	delwin(dialog);
	on_key_resize();
	goto do_resize;
	}

	/* Now, update everything... */
	doupdate();
	}
	delwin(list);
	delwin(dialog);
	return key; /* ESC pressed */
	}