1// SPDX-License-Identifier: GPL-2.0+
2/*
3 *  yesno.c -- implements the yes/no box
4 *
5 *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
6 *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
7 */
8
9#include "dialog.h"
10
11/*
12 * Display termination buttons
13 */
14static void print_buttons(WINDOW * dialog, int height, int width, int selected)
15{
16	int x = width / 2 - 10;
17	int y = height - 2;
18
19	print_button(dialog, " Yes ", y, x, selected == 0);
20	print_button(dialog, "  No  ", y, x + 13, selected == 1);
21
22	wmove(dialog, y, x + 1 + 13 * selected);
23	wrefresh(dialog);
24}
25
26/*
27 * Display a dialog box with two buttons - Yes and No
28 */
29int dialog_yesno(const char *title, const char *prompt, int height, int width)
30{
31	int i, x, y, key = 0, button = 0;
32	WINDOW *dialog;
33
34do_resize:
35	if (getmaxy(stdscr) < (height + YESNO_HEIGHT_MIN))
36		return -ERRDISPLAYTOOSMALL;
37	if (getmaxx(stdscr) < (width + YESNO_WIDTH_MIN))
38		return -ERRDISPLAYTOOSMALL;
39
40	/* center dialog box on screen */
41	x = (getmaxx(stdscr) - width) / 2;
42	y = (getmaxy(stdscr) - height) / 2;
43
44	draw_shadow(stdscr, y, x, height, width);
45
46	dialog = newwin(height, width, y, x);
47	keypad(dialog, TRUE);
48
49	draw_box(dialog, 0, 0, height, width,
50		 dlg.dialog.atr, dlg.border.atr);
51	wattrset(dialog, dlg.border.atr);
52	mvwaddch(dialog, height - 3, 0, ACS_LTEE);
53	for (i = 0; i < width - 2; i++)
54		waddch(dialog, ACS_HLINE);
55	wattrset(dialog, dlg.dialog.atr);
56	waddch(dialog, ACS_RTEE);
57
58	print_title(dialog, title, width);
59
60	wattrset(dialog, dlg.dialog.atr);
61	print_autowrap(dialog, prompt, width - 2, 1, 3);
62
63	print_buttons(dialog, height, width, 0);
64
65	while (key != KEY_ESC) {
66		key = wgetch(dialog);
67		switch (key) {
68		case 'Y':
69		case 'y':
70			delwin(dialog);
71			return 0;
72		case 'N':
73		case 'n':
74			delwin(dialog);
75			return 1;
76
77		case TAB:
78		case KEY_LEFT:
79		case KEY_RIGHT:
80			button = ((key == KEY_LEFT ? --button : ++button) < 0) ? 1 : (button > 1 ? 0 : button);
81
82			print_buttons(dialog, height, width, button);
83			wrefresh(dialog);
84			break;
85		case ' ':
86		case '\n':
87			delwin(dialog);
88			return button;
89		case KEY_ESC:
90			key = on_key_esc(dialog);
91			break;
92		case KEY_RESIZE:
93			delwin(dialog);
94			on_key_resize();
95			goto do_resize;
96		}
97	}
98
99	delwin(dialog);
100	return key;		/* ESC pressed */
101}
102