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

   1/*
   2 *  yesno.c -- implements the yes/no box
   3 *
   4 *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
   5 *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
   6 *
   7 * SPDX-License-Identifier:     GPL-2.0+
   8 */
   9
  10#include "dialog.h"
  11
  12/*
  13 * Display termination buttons
  14 */
  15static void print_buttons(WINDOW * dialog, int height, int width, int selected)
  16{
  17        int x = width / 2 - 10;
  18        int y = height - 2;
  19
  20        print_button(dialog, gettext(" Yes "), y, x, selected == 0);
  21        print_button(dialog, gettext("  No  "), y, x + 13, selected == 1);
  22
  23        wmove(dialog, y, x + 1 + 13 * selected);
  24        wrefresh(dialog);
  25}
  26
  27/*
  28 * Display a dialog box with two buttons - Yes and No
  29 */
  30int dialog_yesno(const char *title, const char *prompt, int height, int width)
  31{
  32        int i, x, y, key = 0, button = 0;
  33        WINDOW *dialog;
  34
  35do_resize:
  36        if (getmaxy(stdscr) < (height + YESNO_HEIGTH_MIN))
  37                return -ERRDISPLAYTOOSMALL;
  38        if (getmaxx(stdscr) < (width + YESNO_WIDTH_MIN))
  39                return -ERRDISPLAYTOOSMALL;
  40
  41        /* center dialog box on screen */
  42        x = (getmaxx(stdscr) - width) / 2;
  43        y = (getmaxy(stdscr) - height) / 2;
  44
  45        draw_shadow(stdscr, y, x, height, width);
  46
  47        dialog = newwin(height, width, y, x);
  48        keypad(dialog, TRUE);
  49
  50        draw_box(dialog, 0, 0, height, width,
  51                 dlg.dialog.atr, dlg.border.atr);
  52        wattrset(dialog, dlg.border.atr);
  53        mvwaddch(dialog, height - 3, 0, ACS_LTEE);
  54        for (i = 0; i < width - 2; i++)
  55                waddch(dialog, ACS_HLINE);
  56        wattrset(dialog, dlg.dialog.atr);
  57        waddch(dialog, ACS_RTEE);
  58
  59        print_title(dialog, title, width);
  60
  61        wattrset(dialog, dlg.dialog.atr);
  62        print_autowrap(dialog, prompt, width - 2, 1, 3);
  63
  64        print_buttons(dialog, height, width, 0);
  65
  66        while (key != KEY_ESC) {
  67                key = wgetch(dialog);
  68                switch (key) {
  69                case 'Y':
  70                case 'y':
  71                        delwin(dialog);
  72                        return 0;
  73                case 'N':
  74                case 'n':
  75                        delwin(dialog);
  76                        return 1;
  77
  78                case TAB:
  79                case KEY_LEFT:
  80                case KEY_RIGHT:
  81                        button = ((key == KEY_LEFT ? --button : ++button) < 0) ? 1 : (button > 1 ? 0 : button);
  82
  83                        print_buttons(dialog, height, width, button);
  84                        wrefresh(dialog);
  85                        break;
  86                case ' ':
  87                case '\n':
  88                        delwin(dialog);
  89                        return button;
  90                case KEY_ESC:
  91                        key = on_key_esc(dialog);
  92                        break;
  93                case KEY_RESIZE:
  94                        delwin(dialog);
  95                        on_key_resize();
  96                        goto do_resize;
  97                }
  98        }
  99
 100        delwin(dialog);
 101        return key;             /* ESC pressed */
 102}
 103