2 * menubox.c -- implements the menu box
4 * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
5 * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcapw@cfw.com)
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.
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.
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.
23 * Changes by Clifford Wolf (god@clifford.at)
27 * *) A bugfix for the Page-Down problem
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
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!
45 * *) Now lxdialog is crash-safe against broken "lxdialog.scrltmp" files
46 * and menus change their size on the fly.
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.
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.
61 #define ITEM_IDENT 4 /* Indent of menu entries. Fixed for all menus */
62 static int menu_width;
67 static void print_item(WINDOW * win, const char *item, int choice,
68 int selected, int hotkey)
71 char *menu_item = malloc(menu_width + 1);
73 strncpy(menu_item, item, menu_width);
74 menu_item[menu_width] = 0;
75 j = first_alpha(menu_item, "YyNnMmHh");
77 /* Clear 'residue' of last item */
78 wattrset(win, menubox_attr);
79 wmove(win, choice, 0);
83 for (i = 0; i < menu_width; i++)
89 wattrset(win, selected ? item_selected_attr : item_attr);
90 mvwaddstr(win, choice, ITEM_IDENT, menu_item);
92 wattrset(win, selected ? tag_key_selected_attr : tag_key_attr);
93 mvwaddch(win, choice, ITEM_IDENT + j, menu_item[j]);
96 wmove(win, choice, ITEM_IDENT + 1);
103 * Print the scroll indicators.
105 static void print_arrows(WINDOW * win, int item_no, int scroll, int y, int x,
110 getyx(win, cur_y, cur_x);
115 wattrset(win, uarrow_attr);
116 waddch(win, ACS_UARROW);
119 wattrset(win, menubox_attr);
120 waddch(win, ACS_HLINE);
121 waddch(win, ACS_HLINE);
122 waddch(win, ACS_HLINE);
123 waddch(win, ACS_HLINE);
130 if ((height < item_no) && (scroll + height < item_no)) {
131 wattrset(win, darrow_attr);
132 waddch(win, ACS_DARROW);
135 wattrset(win, menubox_border_attr);
136 waddch(win, ACS_HLINE);
137 waddch(win, ACS_HLINE);
138 waddch(win, ACS_HLINE);
139 waddch(win, ACS_HLINE);
142 wmove(win, cur_y, cur_x);
147 * Display the termination buttons.
149 static void print_buttons(WINDOW * win, int height, int width, int selected)
151 int x = width / 2 - 16;
154 print_button(win, "Select", y, x, selected == 0);
155 print_button(win, " Exit ", y, x + 12, selected == 1);
156 print_button(win, " Help ", y, x + 24, selected == 2);
158 wmove(win, y, x + 1 + 12 * selected);
162 /* scroll up n lines (n may be negative) */
163 static void do_scroll(WINDOW *win, int *scroll, int n)
168 scrollok(win, FALSE);
169 *scroll = *scroll + n;
174 * Display a menu for choosing among a number of options
176 int dialog_menu(const char *title, const char *prompt, int height, int width,
177 int menu_height, const char *current, int item_no,
178 const char *const *items)
180 int i, j, x, y, box_x, box_y;
181 int key = 0, button = 0, scroll = 0, choice = 0, first_item =
183 WINDOW *dialog, *menu;
186 max_choice = MIN(menu_height, item_no);
188 /* center dialog box on screen */
189 x = (COLS - width) / 2;
190 y = (LINES - height) / 2;
192 draw_shadow(stdscr, y, x, height, width);
194 dialog = newwin(height, width, y, x);
195 keypad(dialog, TRUE);
197 draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
198 wattrset(dialog, border_attr);
199 mvwaddch(dialog, height - 3, 0, ACS_LTEE);
200 for (i = 0; i < width - 2; i++)
201 waddch(dialog, ACS_HLINE);
202 wattrset(dialog, dialog_attr);
203 wbkgdset(dialog, dialog_attr & A_COLOR);
204 waddch(dialog, ACS_RTEE);
206 print_title(dialog, title, width);
208 wattrset(dialog, dialog_attr);
209 print_autowrap(dialog, prompt, width - 2, 1, 3);
211 menu_width = width - 6;
212 box_y = height - menu_height - 5;
213 box_x = (width - menu_width) / 2 - 1;
215 /* create new window for the menu */
216 menu = subwin(dialog, menu_height, menu_width,
217 y + box_y + 1, x + box_x + 1);
220 /* draw a box around the menu items */
221 draw_box(dialog, box_y, box_x, menu_height + 2, menu_width + 2,
222 menubox_border_attr, menubox_attr);
224 /* Set choice to default item */
225 for (i = 0; i < item_no; i++)
226 if (strcmp(current, items[i * 2]) == 0)
229 /* get the scroll info from the temp file */
230 if ((f = fopen("lxdialog.scrltmp", "r")) != NULL) {
231 if ((fscanf(f, "%d\n", &scroll) == 1) && (scroll <= choice) &&
232 (scroll + max_choice > choice) && (scroll >= 0) &&
233 (scroll + max_choice <= item_no)) {
235 choice = choice - scroll;
239 remove("lxdialog.scrltmp");
244 if ((choice >= max_choice) || (f == NULL && choice >= max_choice / 2)) {
245 if (choice >= item_no - max_choice / 2)
246 scroll = first_item = item_no - max_choice;
248 scroll = first_item = choice - max_choice / 2;
249 choice = choice - scroll;
253 for (i = 0; i < max_choice; i++) {
254 print_item(menu, items[(first_item + i) * 2 + 1], i,
256 (items[(first_item + i) * 2][0] != ':'));
261 print_arrows(dialog, item_no, scroll,
262 box_y, box_x + ITEM_IDENT + 1, menu_height);
264 print_buttons(dialog, height, width, 0);
265 wmove(menu, choice, ITEM_IDENT + 1);
271 if (key < 256 && isalpha(key))
274 if (strchr("ynmh", key))
277 for (i = choice + 1; i < max_choice; i++) {
278 j = first_alpha(items[(scroll + i) * 2 + 1], "YyNnMmHh");
279 if (key == tolower(items[(scroll + i) * 2 + 1][j]))
283 for (i = 0; i < max_choice; i++) {
284 j = first_alpha(items [(scroll + i) * 2 + 1], "YyNnMmHh");
285 if (key == tolower(items[(scroll + i) * 2 + 1][j]))
290 if (i < max_choice ||
291 key == KEY_UP || key == KEY_DOWN ||
292 key == '-' || key == '+' ||
293 key == KEY_PPAGE || key == KEY_NPAGE) {
294 /* Remove highligt of current item */
295 print_item(menu, items[(scroll + choice) * 2 + 1],
297 (items[(scroll + choice) * 2][0] != ':'));
299 if (key == KEY_UP || key == '-') {
300 if (choice < 2 && scroll) {
301 /* Scroll menu down */
302 do_scroll(menu, &scroll, -1);
304 print_item(menu, items[scroll * 2 + 1], 0, FALSE,
305 (items[scroll * 2][0] != ':'));
307 choice = MAX(choice - 1, 0);
309 } else if (key == KEY_DOWN || key == '+') {
312 items[(scroll + choice) * 2 + 1], choice, FALSE,
313 (items[(scroll + choice) * 2][0] != ':'));
315 if ((choice > max_choice - 3) &&
316 (scroll + max_choice < item_no)) {
318 do_scroll(menu, &scroll, 1);
320 print_item(menu, items[(scroll + max_choice - 1) * 2 + 1],
321 max_choice - 1, FALSE,
322 (items [(scroll + max_choice - 1) * 2][0] != ':'));
324 choice = MIN(choice + 1, max_choice - 1);
326 } else if (key == KEY_PPAGE) {
327 scrollok(menu, TRUE);
328 for (i = 0; (i < max_choice); i++) {
330 do_scroll(menu, &scroll, -1);
331 print_item(menu, items[scroll * 2 + 1], 0, FALSE,
332 (items[scroll * 2][0] != ':'));
339 } else if (key == KEY_NPAGE) {
340 for (i = 0; (i < max_choice); i++) {
341 if (scroll + max_choice < item_no) {
342 do_scroll(menu, &scroll, 1);
343 print_item(menu, items[(scroll + max_choice - 1) * 2 + 1],
344 max_choice - 1, FALSE,
345 (items [(scroll + max_choice - 1) * 2][0] != ':'));
347 if (choice + 1 < max_choice)
354 print_item(menu, items[(scroll + choice) * 2 + 1],
355 choice, TRUE, (items[(scroll + choice) * 2][0] != ':'));
357 print_arrows(dialog, item_no, scroll,
358 box_y, box_x + ITEM_IDENT + 1, menu_height);
360 wnoutrefresh(dialog);
363 continue; /* wait for another key press */
370 button = ((key == KEY_LEFT ? --button : ++button) < 0)
371 ? 2 : (button > 2 ? 0 : button);
373 print_buttons(dialog, height, width, button);
382 /* save scroll info */
383 if ((f = fopen("lxdialog.scrltmp", "w")) != NULL) {
384 fprintf(f, "%d\n", scroll);
388 fprintf(stderr, "%s\n", items[(scroll + choice) * 2]);
410 fprintf(stderr, "%s \"%s\"\n",
411 items[(scroll + choice) * 2],
412 items[(scroll + choice) * 2 + 1] +
413 first_alpha(items [(scroll + choice) * 2 + 1], ""));
415 fprintf(stderr, "%s\n",
416 items[(scroll + choice) * 2]);
418 remove("lxdialog.scrltmp");
429 remove("lxdialog.scrltmp");
430 return -1; /* ESC pressed */