1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * checklist.c -- implements the checklist box 4 * 5 * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk) 6 * Stuart Herbert - S.Herbert@sheffield.ac.uk: radiolist extension 7 * Alessandro Rubini - rubini@ipvvis.unipv.it: merged the two 8 * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com) 9 */ 10 11 #include "dialog.h" 12 13 static int list_width, check_x, item_x; 14 15 /* 16 * Print list item 17 */ 18 static void print_item(WINDOW * win, int choice, int selected) 19 { 20 int i; 21 char *list_item = malloc(list_width + 1); 22 23 strncpy(list_item, item_str(), list_width - item_x); 24 list_item[list_width - item_x] = '\0'; 25 26 /* Clear 'residue' of last item */ 27 wattrset(win, dlg.menubox.atr); 28 wmove(win, choice, 0); 29 for (i = 0; i < list_width; i++) 30 waddch(win, ' '); 31 32 wmove(win, choice, check_x); 33 wattrset(win, selected ? dlg.check_selected.atr 34 : dlg.check.atr); 35 if (!item_is_tag(':')) 36 wprintw(win, "(%c)", item_is_tag('X') ? 'X' : ' '); 37 38 wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr); 39 mvwaddch(win, choice, item_x, list_item[0]); 40 wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr); 41 waddstr(win, list_item + 1); 42 if (selected) { 43 wmove(win, choice, check_x + 1); 44 wrefresh(win); 45 } 46 free(list_item); 47 } 48 49 /* 50 * Print the scroll indicators. 51 */ 52 static void print_arrows(WINDOW * win, int choice, int item_no, int scroll, 53 int y, int x, int height) 54 { 55 wmove(win, y, x); 56 57 if (scroll > 0) { 58 wattrset(win, dlg.uarrow.atr); 59 waddch(win, ACS_UARROW); 60 waddstr(win, "(-)"); 61 } else { 62 wattrset(win, dlg.menubox.atr); 63 waddch(win, ACS_HLINE); 64 waddch(win, ACS_HLINE); 65 waddch(win, ACS_HLINE); 66 waddch(win, ACS_HLINE); 67 } 68 69 y = y + height + 1; 70 wmove(win, y, x); 71 72 if ((height < item_no) && (scroll + choice < item_no - 1)) { 73 wattrset(win, dlg.darrow.atr); 74 waddch(win, ACS_DARROW); 75 waddstr(win, "(+)"); 76 } else { 77 wattrset(win, dlg.menubox_border.atr); 78 waddch(win, ACS_HLINE); 79 waddch(win, ACS_HLINE); 80 waddch(win, ACS_HLINE); 81 waddch(win, ACS_HLINE); 82 } 83 } 84 85 /* 86 * Display the termination buttons 87 */ 88 static void print_buttons(WINDOW * dialog, int height, int width, int selected) 89 { 90 int x = width / 2 - 11; 91 int y = height - 2; 92 93 print_button(dialog, "Select", y, x, selected == 0); 94 print_button(dialog, " Help ", y, x + 14, selected == 1); 95 96 wmove(dialog, y, x + 1 + 14 * selected); 97 wrefresh(dialog); 98 } 99 100 /* 101 * Display a dialog box with a list of options that can be turned on or off 102 * in the style of radiolist (only one option turned on at a time). 103 */ 104 int dialog_checklist(const char *title, const char *prompt, int height, 105 int width, int list_height) 106 { 107 int i, x, y, box_x, box_y; 108 int key = 0, button = 0, choice = 0, scroll = 0, max_choice; 109 WINDOW *dialog, *list; 110 111 /* which item to highlight */ 112 item_foreach() { 113 if (item_is_tag('X')) 114 choice = item_n(); 115 if (item_is_selected()) { 116 choice = item_n(); 117 break; 118 } 119 } 120 121 do_resize: 122 if (getmaxy(stdscr) < (height + CHECKLIST_HEIGTH_MIN)) 123 return -ERRDISPLAYTOOSMALL; 124 if (getmaxx(stdscr) < (width + CHECKLIST_WIDTH_MIN)) 125 return -ERRDISPLAYTOOSMALL; 126 127 max_choice = MIN(list_height, item_count()); 128 129 /* center dialog box on screen */ 130 x = (getmaxx(stdscr) - width) / 2; 131 y = (getmaxy(stdscr) - height) / 2; 132 133 draw_shadow(stdscr, y, x, height, width); 134 135 dialog = newwin(height, width, y, x); 136 keypad(dialog, TRUE); 137 138 draw_box(dialog, 0, 0, height, width, 139 dlg.dialog.atr, dlg.border.atr); 140 wattrset(dialog, dlg.border.atr); 141 mvwaddch(dialog, height - 3, 0, ACS_LTEE); 142 for (i = 0; i < width - 2; i++) 143 waddch(dialog, ACS_HLINE); 144 wattrset(dialog, dlg.dialog.atr); 145 waddch(dialog, ACS_RTEE); 146 147 print_title(dialog, title, width); 148 149 wattrset(dialog, dlg.dialog.atr); 150 print_autowrap(dialog, prompt, width - 2, 1, 3); 151 152 list_width = width - 6; 153 box_y = height - list_height - 5; 154 box_x = (width - list_width) / 2 - 1; 155 156 /* create new window for the list */ 157 list = subwin(dialog, list_height, list_width, y + box_y + 1, 158 x + box_x + 1); 159 160 keypad(list, TRUE); 161 162 /* draw a box around the list items */ 163 draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2, 164 dlg.menubox_border.atr, dlg.menubox.atr); 165 166 /* Find length of longest item in order to center checklist */ 167 check_x = 0; 168 item_foreach() 169 check_x = MAX(check_x, strlen(item_str()) + 4); 170 check_x = MIN(check_x, list_width); 171 172 check_x = (list_width - check_x) / 2; 173 item_x = check_x + 4; 174 175 if (choice >= list_height) { 176 scroll = choice - list_height + 1; 177 choice -= scroll; 178 } 179 180 /* Print the list */ 181 for (i = 0; i < max_choice; i++) { 182 item_set(scroll + i); 183 print_item(list, i, i == choice); 184 } 185 186 print_arrows(dialog, choice, item_count(), scroll, 187 box_y, box_x + check_x + 5, list_height); 188 189 print_buttons(dialog, height, width, 0); 190 191 wnoutrefresh(dialog); 192 wnoutrefresh(list); 193 doupdate(); 194 195 while (key != KEY_ESC) { 196 key = wgetch(dialog); 197 198 for (i = 0; i < max_choice; i++) { 199 item_set(i + scroll); 200 if (toupper(key) == toupper(item_str()[0])) 201 break; 202 } 203 204 if (i < max_choice || key == KEY_UP || key == KEY_DOWN || 205 key == '+' || key == '-') { 206 if (key == KEY_UP || key == '-') { 207 if (!choice) { 208 if (!scroll) 209 continue; 210 /* Scroll list down */ 211 if (list_height > 1) { 212 /* De-highlight current first item */ 213 item_set(scroll); 214 print_item(list, 0, FALSE); 215 scrollok(list, TRUE); 216 wscrl(list, -1); 217 scrollok(list, FALSE); 218 } 219 scroll--; 220 item_set(scroll); 221 print_item(list, 0, TRUE); 222 print_arrows(dialog, choice, item_count(), 223 scroll, box_y, box_x + check_x + 5, list_height); 224 225 wnoutrefresh(dialog); 226 wrefresh(list); 227 228 continue; /* wait for another key press */ 229 } else 230 i = choice - 1; 231 } else if (key == KEY_DOWN || key == '+') { 232 if (choice == max_choice - 1) { 233 if (scroll + choice >= item_count() - 1) 234 continue; 235 /* Scroll list up */ 236 if (list_height > 1) { 237 /* De-highlight current last item before scrolling up */ 238 item_set(scroll + max_choice - 1); 239 print_item(list, 240 max_choice - 1, 241 FALSE); 242 scrollok(list, TRUE); 243 wscrl(list, 1); 244 scrollok(list, FALSE); 245 } 246 scroll++; 247 item_set(scroll + max_choice - 1); 248 print_item(list, max_choice - 1, TRUE); 249 250 print_arrows(dialog, choice, item_count(), 251 scroll, box_y, box_x + check_x + 5, list_height); 252 253 wnoutrefresh(dialog); 254 wrefresh(list); 255 256 continue; /* wait for another key press */ 257 } else 258 i = choice + 1; 259 } 260 if (i != choice) { 261 /* De-highlight current item */ 262 item_set(scroll + choice); 263 print_item(list, choice, FALSE); 264 /* Highlight new item */ 265 choice = i; 266 item_set(scroll + choice); 267 print_item(list, choice, TRUE); 268 wnoutrefresh(dialog); 269 wrefresh(list); 270 } 271 continue; /* wait for another key press */ 272 } 273 switch (key) { 274 case 'H': 275 case 'h': 276 case '?': 277 button = 1; 278 /* fall-through */ 279 case 'S': 280 case 's': 281 case ' ': 282 case '\n': 283 item_foreach() 284 item_set_selected(0); 285 item_set(scroll + choice); 286 item_set_selected(1); 287 delwin(list); 288 delwin(dialog); 289 return button; 290 case TAB: 291 case KEY_LEFT: 292 case KEY_RIGHT: 293 button = ((key == KEY_LEFT ? --button : ++button) < 0) 294 ? 1 : (button > 1 ? 0 : button); 295 296 print_buttons(dialog, height, width, button); 297 wrefresh(dialog); 298 break; 299 case 'X': 300 case 'x': 301 key = KEY_ESC; 302 break; 303 case KEY_ESC: 304 key = on_key_esc(dialog); 305 break; 306 case KEY_RESIZE: 307 delwin(list); 308 delwin(dialog); 309 on_key_resize(); 310 goto do_resize; 311 } 312 313 /* Now, update everything... */ 314 doupdate(); 315 } 316 delwin(list); 317 delwin(dialog); 318 return key; /* ESC pressed */ 319 } 320