| 1 | /*
|
|---|
| 2 | * menubox.c -- implements the menu box
|
|---|
| 3 | *
|
|---|
| 4 | * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
|
|---|
| 5 | * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcapw@cfw.com)
|
|---|
| 6 | *
|
|---|
| 7 | * This program is free software; you can redistribute it and/or
|
|---|
| 8 | * modify it under the terms of the GNU General Public License
|
|---|
| 9 | * as published by the Free Software Foundation; either version 2
|
|---|
| 10 | * of the License, or (at your option) any later version.
|
|---|
| 11 | *
|
|---|
| 12 | * This program is distributed in the hope that it will be useful,
|
|---|
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|---|
| 15 | * GNU General Public License for more details.
|
|---|
| 16 | *
|
|---|
| 17 | * You should have received a copy of the GNU General Public License
|
|---|
| 18 | * along with this program; if not, write to the Free Software
|
|---|
| 19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|---|
| 20 | */
|
|---|
| 21 |
|
|---|
| 22 | /*
|
|---|
| 23 | * Changes by Clifford Wolf (god@clifford.at)
|
|---|
| 24 | *
|
|---|
| 25 | * [ 1998-06-13 ]
|
|---|
| 26 | *
|
|---|
| 27 | * *) A bugfix for the Page-Down problem
|
|---|
| 28 | *
|
|---|
| 29 | * *) Formerly when I used Page Down and Page Up, the cursor would be set
|
|---|
| 30 | * to the first position in the menu box. Now lxdialog is a bit
|
|---|
| 31 | * smarter and works more like other menu systems (just have a look at
|
|---|
| 32 | * it).
|
|---|
| 33 | *
|
|---|
| 34 | * *) Formerly if I selected something my scrolling would be broken because
|
|---|
| 35 | * lxdialog is re-invoked by the Menuconfig shell script, can't
|
|---|
| 36 | * remember the last scrolling position, and just sets it so that the
|
|---|
| 37 | * cursor is at the bottom of the box. Now it writes the temporary file
|
|---|
| 38 | * lxdialog.scrltmp which contains this information. The file is
|
|---|
| 39 | * deleted by lxdialog if the user leaves a submenu or enters a new
|
|---|
| 40 | * one, but it would be nice if Menuconfig could make another "rm -f"
|
|---|
| 41 | * just to be sure. Just try it out - you will recognise a difference!
|
|---|
| 42 | *
|
|---|
| 43 | * [ 1998-06-14 ]
|
|---|
| 44 | *
|
|---|
| 45 | * *) Now lxdialog is crash-safe against broken "lxdialog.scrltmp" files
|
|---|
| 46 | * and menus change their size on the fly.
|
|---|
| 47 | *
|
|---|
| 48 | * *) If for some reason the last scrolling position is not saved by
|
|---|
| 49 | * lxdialog, it sets the scrolling so that the selected item is in the
|
|---|
| 50 | * middle of the menu box, not at the bottom.
|
|---|
| 51 | *
|
|---|
| 52 | * 02 January 1999, Michael Elizabeth Chastain (mec@shout.net)
|
|---|
| 53 | * Reset 'scroll' to 0 if the value from lxdialog.scrltmp is bogus.
|
|---|
| 54 | * This fixes a bug in Menuconfig where using ' ' to descend into menus
|
|---|
| 55 | * would leave mis-synchronized lxdialog.scrltmp files lying around,
|
|---|
| 56 | * fscanf would read in 'scroll', and eventually that value would get used.
|
|---|
| 57 | */
|
|---|
| 58 |
|
|---|
| 59 | #include "dialog.h"
|
|---|
| 60 |
|
|---|
| 61 | static int menu_width, item_x;
|
|---|
| 62 |
|
|---|
| 63 | /*
|
|---|
| 64 | * Print menu item
|
|---|
| 65 | */
|
|---|
| 66 | static void do_print_item(WINDOW * win, const char *item, int choice,
|
|---|
| 67 | int selected, int hotkey)
|
|---|
| 68 | {
|
|---|
| 69 | int j;
|
|---|
| 70 | char *menu_item = malloc(menu_width + 1);
|
|---|
| 71 |
|
|---|
| 72 | strncpy(menu_item, item, menu_width - item_x);
|
|---|
| 73 | menu_item[menu_width] = 0;
|
|---|
| 74 | j = first_alpha(menu_item, "YyNnMmHh");
|
|---|
| 75 |
|
|---|
| 76 | /* Clear 'residue' of last item */
|
|---|
| 77 | wattrset(win, menubox_attr);
|
|---|
| 78 | wmove(win, choice, 0);
|
|---|
| 79 | #if OLD_NCURSES
|
|---|
| 80 | {
|
|---|
| 81 | int i;
|
|---|
| 82 | for (i = 0; i < menu_width; i++)
|
|---|
| 83 | waddch(win, ' ');
|
|---|
| 84 | }
|
|---|
| 85 | #else
|
|---|
| 86 | wclrtoeol(win);
|
|---|
| 87 | #endif
|
|---|
| 88 | wattrset(win, selected ? item_selected_attr : item_attr);
|
|---|
| 89 | mvwaddstr(win, choice, item_x, menu_item);
|
|---|
| 90 | if (hotkey) {
|
|---|
| 91 | wattrset(win, selected ? tag_key_selected_attr : tag_key_attr);
|
|---|
| 92 | mvwaddch(win, choice, item_x + j, menu_item[j]);
|
|---|
| 93 | }
|
|---|
| 94 | if (selected) {
|
|---|
| 95 | wmove(win, choice, item_x + 1);
|
|---|
| 96 | }
|
|---|
| 97 | free(menu_item);
|
|---|
| 98 | wrefresh(win);
|
|---|
| 99 | }
|
|---|
| 100 |
|
|---|
| 101 | #define print_item(index, choice, selected) \
|
|---|
| 102 | do {\
|
|---|
| 103 | int hotkey = (items[(index) * 2][0] != ':'); \
|
|---|
| 104 | do_print_item(menu, items[(index) * 2 + 1], choice, selected, hotkey); \
|
|---|
| 105 | } while (0)
|
|---|
| 106 |
|
|---|
| 107 | /*
|
|---|
| 108 | * Print the scroll indicators.
|
|---|
| 109 | */
|
|---|
| 110 | static void print_arrows(WINDOW * win, int item_no, int scroll, int y, int x,
|
|---|
| 111 | int height)
|
|---|
| 112 | {
|
|---|
| 113 | int cur_y, cur_x;
|
|---|
| 114 |
|
|---|
| 115 | getyx(win, cur_y, cur_x);
|
|---|
| 116 |
|
|---|
| 117 | wmove(win, y, x);
|
|---|
| 118 |
|
|---|
| 119 | if (scroll > 0) {
|
|---|
| 120 | wattrset(win, uarrow_attr);
|
|---|
| 121 | waddch(win, ACS_UARROW);
|
|---|
| 122 | waddstr(win, "(-)");
|
|---|
| 123 | } else {
|
|---|
| 124 | wattrset(win, menubox_attr);
|
|---|
| 125 | waddch(win, ACS_HLINE);
|
|---|
| 126 | waddch(win, ACS_HLINE);
|
|---|
| 127 | waddch(win, ACS_HLINE);
|
|---|
| 128 | waddch(win, ACS_HLINE);
|
|---|
| 129 | }
|
|---|
| 130 |
|
|---|
| 131 | y = y + height + 1;
|
|---|
| 132 | wmove(win, y, x);
|
|---|
| 133 | wrefresh(win);
|
|---|
| 134 |
|
|---|
| 135 | if ((height < item_no) && (scroll + height < item_no)) {
|
|---|
| 136 | wattrset(win, darrow_attr);
|
|---|
| 137 | waddch(win, ACS_DARROW);
|
|---|
| 138 | waddstr(win, "(+)");
|
|---|
| 139 | } else {
|
|---|
| 140 | wattrset(win, menubox_border_attr);
|
|---|
| 141 | waddch(win, ACS_HLINE);
|
|---|
| 142 | waddch(win, ACS_HLINE);
|
|---|
| 143 | waddch(win, ACS_HLINE);
|
|---|
| 144 | waddch(win, ACS_HLINE);
|
|---|
| 145 | }
|
|---|
| 146 |
|
|---|
| 147 | wmove(win, cur_y, cur_x);
|
|---|
| 148 | wrefresh(win);
|
|---|
| 149 | }
|
|---|
| 150 |
|
|---|
| 151 | /*
|
|---|
| 152 | * Display the termination buttons.
|
|---|
| 153 | */
|
|---|
| 154 | static void print_buttons(WINDOW * win, int height, int width, int selected)
|
|---|
| 155 | {
|
|---|
| 156 | int x = width / 2 - 16;
|
|---|
| 157 | int y = height - 2;
|
|---|
| 158 |
|
|---|
| 159 | print_button(win, "Select", y, x, selected == 0);
|
|---|
| 160 | print_button(win, " Exit ", y, x + 12, selected == 1);
|
|---|
| 161 | print_button(win, " Help ", y, x + 24, selected == 2);
|
|---|
| 162 |
|
|---|
| 163 | wmove(win, y, x + 1 + 12 * selected);
|
|---|
| 164 | wrefresh(win);
|
|---|
| 165 | }
|
|---|
| 166 |
|
|---|
| 167 | /* scroll up n lines (n may be negative) */
|
|---|
| 168 | static void do_scroll(WINDOW *win, int *scroll, int n)
|
|---|
| 169 | {
|
|---|
| 170 | /* Scroll menu up */
|
|---|
| 171 | scrollok(win, TRUE);
|
|---|
| 172 | wscrl(win, n);
|
|---|
| 173 | scrollok(win, FALSE);
|
|---|
| 174 | *scroll = *scroll + n;
|
|---|
| 175 | wrefresh(win);
|
|---|
| 176 | }
|
|---|
| 177 |
|
|---|
| 178 | /*
|
|---|
| 179 | * Display a menu for choosing among a number of options
|
|---|
| 180 | */
|
|---|
| 181 | int dialog_menu(const char *title, const char *prompt, int height, int width,
|
|---|
| 182 | int menu_height, const char *current, int item_no,
|
|---|
| 183 | const char *const *items)
|
|---|
| 184 | {
|
|---|
| 185 | int i, j, x, y, box_x, box_y;
|
|---|
| 186 | int key = 0, button = 0, scroll = 0, choice = 0;
|
|---|
| 187 | int first_item = 0, max_choice;
|
|---|
| 188 | WINDOW *dialog, *menu;
|
|---|
| 189 | FILE *f;
|
|---|
| 190 |
|
|---|
| 191 | max_choice = MIN(menu_height, item_no);
|
|---|
| 192 |
|
|---|
| 193 | /* center dialog box on screen */
|
|---|
| 194 | x = (COLS - width) / 2;
|
|---|
| 195 | y = (LINES - height) / 2;
|
|---|
| 196 |
|
|---|
| 197 | draw_shadow(stdscr, y, x, height, width);
|
|---|
| 198 |
|
|---|
| 199 | dialog = newwin(height, width, y, x);
|
|---|
| 200 | keypad(dialog, TRUE);
|
|---|
| 201 |
|
|---|
| 202 | draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
|
|---|
| 203 | wattrset(dialog, border_attr);
|
|---|
| 204 | mvwaddch(dialog, height - 3, 0, ACS_LTEE);
|
|---|
| 205 | for (i = 0; i < width - 2; i++)
|
|---|
| 206 | waddch(dialog, ACS_HLINE);
|
|---|
| 207 | wattrset(dialog, dialog_attr);
|
|---|
| 208 | wbkgdset(dialog, dialog_attr & A_COLOR);
|
|---|
| 209 | waddch(dialog, ACS_RTEE);
|
|---|
| 210 |
|
|---|
| 211 | print_title(dialog, title, width);
|
|---|
| 212 |
|
|---|
| 213 | wattrset(dialog, dialog_attr);
|
|---|
| 214 | print_autowrap(dialog, prompt, width - 2, 1, 3);
|
|---|
| 215 |
|
|---|
| 216 | menu_width = width - 6;
|
|---|
| 217 | box_y = height - menu_height - 5;
|
|---|
| 218 | box_x = (width - menu_width) / 2 - 1;
|
|---|
| 219 |
|
|---|
| 220 | /* create new window for the menu */
|
|---|
| 221 | menu = subwin(dialog, menu_height, menu_width,
|
|---|
| 222 | y + box_y + 1, x + box_x + 1);
|
|---|
| 223 | keypad(menu, TRUE);
|
|---|
| 224 |
|
|---|
| 225 | /* draw a box around the menu items */
|
|---|
| 226 | draw_box(dialog, box_y, box_x, menu_height + 2, menu_width + 2,
|
|---|
| 227 | menubox_border_attr, menubox_attr);
|
|---|
| 228 |
|
|---|
| 229 | item_x = (menu_width - 70) / 2;
|
|---|
| 230 |
|
|---|
| 231 | /* Set choice to default item */
|
|---|
| 232 | for (i = 0; i < item_no; i++)
|
|---|
| 233 | if (strcmp(current, items[i * 2]) == 0)
|
|---|
| 234 | choice = i;
|
|---|
| 235 |
|
|---|
| 236 | /* get the scroll info from the temp file */
|
|---|
| 237 | if ((f = fopen("lxdialog.scrltmp", "r")) != NULL) {
|
|---|
| 238 | if ((fscanf(f, "%d\n", &scroll) == 1) && (scroll <= choice) &&
|
|---|
| 239 | (scroll + max_choice > choice) && (scroll >= 0) &&
|
|---|
| 240 | (scroll + max_choice <= item_no)) {
|
|---|
| 241 | first_item = scroll;
|
|---|
| 242 | choice = choice - scroll;
|
|---|
| 243 | fclose(f);
|
|---|
| 244 | } else {
|
|---|
| 245 | scroll = 0;
|
|---|
| 246 | remove("lxdialog.scrltmp");
|
|---|
| 247 | fclose(f);
|
|---|
| 248 | f = NULL;
|
|---|
| 249 | }
|
|---|
| 250 | }
|
|---|
| 251 | if ((choice >= max_choice) || (f == NULL && choice >= max_choice / 2)) {
|
|---|
| 252 | if (choice >= item_no - max_choice / 2)
|
|---|
| 253 | scroll = first_item = item_no - max_choice;
|
|---|
| 254 | else
|
|---|
| 255 | scroll = first_item = choice - max_choice / 2;
|
|---|
| 256 | choice = choice - scroll;
|
|---|
| 257 | }
|
|---|
| 258 |
|
|---|
| 259 | /* Print the menu */
|
|---|
| 260 | for (i = 0; i < max_choice; i++) {
|
|---|
| 261 | print_item(first_item + i, i, i == choice);
|
|---|
| 262 | }
|
|---|
| 263 |
|
|---|
| 264 | wnoutrefresh(menu);
|
|---|
| 265 |
|
|---|
| 266 | print_arrows(dialog, item_no, scroll,
|
|---|
| 267 | box_y, box_x + item_x + 1, menu_height);
|
|---|
| 268 |
|
|---|
| 269 | print_buttons(dialog, height, width, 0);
|
|---|
| 270 | wmove(menu, choice, item_x + 1);
|
|---|
| 271 | wrefresh(menu);
|
|---|
| 272 |
|
|---|
| 273 | while (key != ESC) {
|
|---|
| 274 | key = wgetch(menu);
|
|---|
| 275 |
|
|---|
| 276 | if (key < 256 && isalpha(key))
|
|---|
| 277 | key = tolower(key);
|
|---|
| 278 |
|
|---|
| 279 | if (strchr("ynmh", key))
|
|---|
| 280 | i = max_choice;
|
|---|
| 281 | else {
|
|---|
| 282 | for (i = choice + 1; i < max_choice; i++) {
|
|---|
| 283 | j = first_alpha(items[(scroll + i) * 2 + 1], "YyNnMmHh");
|
|---|
| 284 | if (key == tolower(items[(scroll + i) * 2 + 1][j]))
|
|---|
| 285 | break;
|
|---|
| 286 | }
|
|---|
| 287 | if (i == max_choice)
|
|---|
| 288 | for (i = 0; i < max_choice; i++) {
|
|---|
| 289 | j = first_alpha(items [(scroll + i) * 2 + 1], "YyNnMmHh");
|
|---|
| 290 | if (key == tolower(items[(scroll + i) * 2 + 1][j]))
|
|---|
| 291 | break;
|
|---|
| 292 | }
|
|---|
| 293 | }
|
|---|
| 294 |
|
|---|
| 295 | if (i < max_choice ||
|
|---|
| 296 | key == KEY_UP || key == KEY_DOWN ||
|
|---|
| 297 | key == '-' || key == '+' ||
|
|---|
| 298 | key == KEY_PPAGE || key == KEY_NPAGE) {
|
|---|
| 299 | /* Remove highligt of current item */
|
|---|
| 300 | print_item(scroll + choice, choice, FALSE);
|
|---|
| 301 |
|
|---|
| 302 | if (key == KEY_UP || key == '-') {
|
|---|
| 303 | if (choice < 2 && scroll) {
|
|---|
| 304 | /* Scroll menu down */
|
|---|
| 305 | do_scroll(menu, &scroll, -1);
|
|---|
| 306 |
|
|---|
| 307 | print_item(scroll, 0, FALSE);
|
|---|
| 308 | } else
|
|---|
| 309 | choice = MAX(choice - 1, 0);
|
|---|
| 310 |
|
|---|
| 311 | } else if (key == KEY_DOWN || key == '+') {
|
|---|
| 312 | print_item(scroll+choice, choice, FALSE);
|
|---|
| 313 |
|
|---|
| 314 | if ((choice > max_choice - 3) &&
|
|---|
| 315 | (scroll + max_choice < item_no)) {
|
|---|
| 316 | /* Scroll menu up */
|
|---|
| 317 | do_scroll(menu, &scroll, 1);
|
|---|
| 318 |
|
|---|
| 319 | print_item(scroll+max_choice - 1,
|
|---|
| 320 | max_choice - 1, FALSE);
|
|---|
| 321 | } else
|
|---|
| 322 | choice = MIN(choice + 1, max_choice - 1);
|
|---|
| 323 |
|
|---|
| 324 | } else if (key == KEY_PPAGE) {
|
|---|
| 325 | scrollok(menu, TRUE);
|
|---|
| 326 | for (i = 0; (i < max_choice); i++) {
|
|---|
| 327 | if (scroll > 0) {
|
|---|
| 328 | do_scroll(menu, &scroll, -1);
|
|---|
| 329 | print_item(scroll, 0, FALSE);
|
|---|
| 330 | } else {
|
|---|
| 331 | if (choice > 0)
|
|---|
| 332 | choice--;
|
|---|
| 333 | }
|
|---|
| 334 | }
|
|---|
| 335 |
|
|---|
| 336 | } else if (key == KEY_NPAGE) {
|
|---|
| 337 | for (i = 0; (i < max_choice); i++) {
|
|---|
| 338 | if (scroll + max_choice < item_no) {
|
|---|
| 339 | do_scroll(menu, &scroll, 1);
|
|---|
| 340 | print_item(scroll+max_choice-1,
|
|---|
| 341 | max_choice - 1, FALSE);
|
|---|
| 342 | } else {
|
|---|
| 343 | if (choice + 1 < max_choice)
|
|---|
| 344 | choice++;
|
|---|
| 345 | }
|
|---|
| 346 | }
|
|---|
| 347 | } else
|
|---|
| 348 | choice = i;
|
|---|
| 349 |
|
|---|
| 350 | print_item(scroll + choice, choice, TRUE);
|
|---|
| 351 |
|
|---|
| 352 | print_arrows(dialog, item_no, scroll,
|
|---|
| 353 | box_y, box_x + item_x + 1, menu_height);
|
|---|
| 354 |
|
|---|
| 355 | wnoutrefresh(dialog);
|
|---|
| 356 | wrefresh(menu);
|
|---|
| 357 |
|
|---|
| 358 | continue; /* wait for another key press */
|
|---|
| 359 | }
|
|---|
| 360 |
|
|---|
| 361 | switch (key) {
|
|---|
| 362 | case KEY_LEFT:
|
|---|
| 363 | case TAB:
|
|---|
| 364 | case KEY_RIGHT:
|
|---|
| 365 | button = ((key == KEY_LEFT ? --button : ++button) < 0)
|
|---|
| 366 | ? 2 : (button > 2 ? 0 : button);
|
|---|
| 367 |
|
|---|
| 368 | print_buttons(dialog, height, width, button);
|
|---|
| 369 | wrefresh(menu);
|
|---|
| 370 | break;
|
|---|
| 371 | case ' ':
|
|---|
| 372 | case 's':
|
|---|
| 373 | case 'y':
|
|---|
| 374 | case 'n':
|
|---|
| 375 | case 'm':
|
|---|
| 376 | case '/':
|
|---|
| 377 | /* save scroll info */
|
|---|
| 378 | if ((f = fopen("lxdialog.scrltmp", "w")) != NULL) {
|
|---|
| 379 | fprintf(f, "%d\n", scroll);
|
|---|
| 380 | fclose(f);
|
|---|
| 381 | }
|
|---|
| 382 | delwin(dialog);
|
|---|
| 383 | fprintf(stderr, "%s\n", items[(scroll + choice) * 2]);
|
|---|
| 384 | switch (key) {
|
|---|
| 385 | case 's':
|
|---|
| 386 | return 3;
|
|---|
| 387 | case 'y':
|
|---|
| 388 | return 3;
|
|---|
| 389 | case 'n':
|
|---|
| 390 | return 4;
|
|---|
| 391 | case 'm':
|
|---|
| 392 | return 5;
|
|---|
| 393 | case ' ':
|
|---|
| 394 | return 6;
|
|---|
| 395 | case '/':
|
|---|
| 396 | return 7;
|
|---|
| 397 | }
|
|---|
| 398 | return 0;
|
|---|
| 399 | case 'h':
|
|---|
| 400 | case '?':
|
|---|
| 401 | button = 2;
|
|---|
| 402 | case '\n':
|
|---|
| 403 | delwin(dialog);
|
|---|
| 404 | if (button == 2)
|
|---|
| 405 | fprintf(stderr, "%s \"%s\"\n",
|
|---|
| 406 | items[(scroll + choice) * 2],
|
|---|
| 407 | items[(scroll + choice) * 2 + 1] +
|
|---|
| 408 | first_alpha(items [(scroll + choice) * 2 + 1], ""));
|
|---|
| 409 | else
|
|---|
| 410 | fprintf(stderr, "%s\n",
|
|---|
| 411 | items[(scroll + choice) * 2]);
|
|---|
| 412 |
|
|---|
| 413 | remove("lxdialog.scrltmp");
|
|---|
| 414 | return button;
|
|---|
| 415 | case 'e':
|
|---|
| 416 | case 'x':
|
|---|
| 417 | key = ESC;
|
|---|
| 418 | case ESC:
|
|---|
| 419 | break;
|
|---|
| 420 | }
|
|---|
| 421 | }
|
|---|
| 422 |
|
|---|
| 423 | delwin(dialog);
|
|---|
| 424 | remove("lxdialog.scrltmp");
|
|---|
| 425 | return -1; /* ESC pressed */
|
|---|
| 426 | }
|
|---|
