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/scripts/kconfig/lxdialog/yesno.c

http://github.com/mirrors/linux
C | 101 lines | 70 code | 17 blank | 14 comment | 9 complexity | db0a0bbdbcdb11004dc9eb39835de1b6 MD5 | raw file
  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_HEIGTH_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}