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 */
14 static 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 */
29 int 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
34 do_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
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