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_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