LXR linux/scripts/kconfig/lxdialog/yesno.c

   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}
 102