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 static int menu_width, item_x;
66 static void do_print_item(WINDOW * win, const char *item, int choice,
67 int selected, int hotkey)
70 char *menu_item = malloc(menu_width + 1);
72 strncpy(menu_item, item, menu_width - item_x);
73 menu_item[menu_width] = 0;
74 j = first_alpha(menu_item, "YyNnMmHh");
76 /* Clear 'residue' of last item */
77 wattrset(win, dlg.menubox.atr);
78 wmove(win, choice, 0);
82 for (i = 0; i < menu_width; i++)
88 wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
89 mvwaddstr(win, choice, item_x, menu_item);
91 wattrset(win, selected ? dlg.tag_key_selected.atr
93 mvwaddch(win, choice, item_x + j, menu_item[j]);
96 wmove(win, choice, item_x + 1);
102 #define print_item(index, choice, selected) \
104 int hotkey = (items[(index) * 2][0] != ':'); \
105 do_print_item(menu, items[(index) * 2 + 1], choice, selected, hotkey); \
109 * Print the scroll indicators.
111 static void print_arrows(WINDOW * win, int item_no, int scroll, int y, int x,
116 getyx(win, cur_y, cur_x);
121 wattrset(win, dlg.uarrow.atr);
122 waddch(win, ACS_UARROW);
125 wattrset(win, dlg.menubox.atr);
126 waddch(win, ACS_HLINE);
127 waddch(win, ACS_HLINE);
128 waddch(win, ACS_HLINE);
129 waddch(win, ACS_HLINE);
136 if ((height < item_no) && (scroll + height < item_no)) {
137 wattrset(win, dlg.darrow.atr);
138 waddch(win, ACS_DARROW);
141 wattrset(win, dlg.menubox_border.atr);
142 waddch(win, ACS_HLINE);
143 waddch(win, ACS_HLINE);
144 waddch(win, ACS_HLINE);
145 waddch(win, ACS_HLINE);
148 wmove(win, cur_y, cur_x);
153 * Display the termination buttons.
155 static void print_buttons(WINDOW * win, int height, int width, int selected)
157 int x = width / 2 - 16;
160 print_button(win, "Select", y, x, selected == 0);
161 print_button(win, " Exit ", y, x + 12, selected == 1);
162 print_button(win, " Help ", y, x + 24, selected == 2);
164 wmove(win, y, x + 1 + 12 * selected);
168 /* scroll up n lines (n may be negative) */
169 static void do_scroll(WINDOW *win, int *scroll, int n)
174 scrollok(win, FALSE);
175 *scroll = *scroll + n;
180 * Display a menu for choosing among a number of options
182 int dialog_menu(const char *title, const char *prompt, int height, int width,
183 int menu_height, const char *current, int item_no,
184 const char *const *items)
186 int i, j, x, y, box_x, box_y;
187 int key = 0, button = 0, scroll = 0, choice = 0;
188 int first_item = 0, max_choice;
189 WINDOW *dialog, *menu;
192 max_choice = MIN(menu_height, item_no);
194 /* center dialog box on screen */
195 x = (COLS - width) / 2;
196 y = (LINES - height) / 2;
198 draw_shadow(stdscr, y, x, height, width);
200 dialog = newwin(height, width, y, x);
201 keypad(dialog, TRUE);
203 draw_box(dialog, 0, 0, height, width,
204 dlg.dialog.atr, dlg.border.atr);
205 wattrset(dialog, dlg.border.atr);
206 mvwaddch(dialog, height - 3, 0, ACS_LTEE);
207 for (i = 0; i < width - 2; i++)
208 waddch(dialog, ACS_HLINE);
209 wattrset(dialog, dlg.dialog.atr);
210 wbkgdset(dialog, dlg.dialog.atr & A_COLOR);
211 waddch(dialog, ACS_RTEE);
213 print_title(dialog, title, width);
215 wattrset(dialog, dlg.dialog.atr);
216 print_autowrap(dialog, prompt, width - 2, 1, 3);
218 menu_width = width - 6;
219 box_y = height - menu_height - 5;
220 box_x = (width - menu_width) / 2 - 1;
222 /* create new window for the menu */
223 menu = subwin(dialog, menu_height, menu_width,
224 y + box_y + 1, x + box_x + 1);
227 /* draw a box around the menu items */
228 draw_box(dialog, box_y, box_x, menu_height + 2, menu_width + 2,
229 dlg.menubox_border.atr, dlg.menubox.atr);
231 item_x = (menu_width - 70) / 2;
233 /* Set choice to default item */
234 for (i = 0; i < item_no; i++)
235 if (strcmp(current, items[i * 2]) == 0)
238 /* get the scroll info from the temp file */
239 if ((f = fopen("lxdialog.scrltmp", "r")) != NULL) {
240 if ((fscanf(f, "%d\n", &scroll) == 1) && (scroll <= choice) &&
241 (scroll + max_choice > choice) && (scroll >= 0) &&
242 (scroll + max_choice <= item_no)) {
244 choice = choice - scroll;
248 remove("lxdialog.scrltmp");
253 if ((choice >= max_choice) || (f == NULL && choice >= max_choice / 2)) {
254 if (choice >= item_no - max_choice / 2)
255 scroll = first_item = item_no - max_choice;
257 scroll = first_item = choice - max_choice / 2;
258 choice = choice - scroll;
262 for (i = 0; i < max_choice; i++) {
263 print_item(first_item + i, i, i == choice);
268 print_arrows(dialog, item_no, scroll,
269 box_y, box_x + item_x + 1, menu_height);
271 print_buttons(dialog, height, width, 0);
272 wmove(menu, choice, item_x + 1);
278 if (key < 256 && isalpha(key))
281 if (strchr("ynmh", key))
284 for (i = choice + 1; i < max_choice; i++) {
285 j = first_alpha(items[(scroll + i) * 2 + 1], "YyNnMmHh");
286 if (key == tolower(items[(scroll + i) * 2 + 1][j]))
290 for (i = 0; i < max_choice; i++) {
291 j = first_alpha(items [(scroll + i) * 2 + 1], "YyNnMmHh");
292 if (key == tolower(items[(scroll + i) * 2 + 1][j]))
297 if (i < max_choice ||
298 key == KEY_UP || key == KEY_DOWN ||
299 key == '-' || key == '+' ||
300 key == KEY_PPAGE || key == KEY_NPAGE) {
301 /* Remove highligt of current item */
302 print_item(scroll + choice, choice, FALSE);
304 if (key == KEY_UP || key == '-') {
305 if (choice < 2 && scroll) {
306 /* Scroll menu down */
307 do_scroll(menu, &scroll, -1);
309 print_item(scroll, 0, FALSE);
311 choice = MAX(choice - 1, 0);
313 } else if (key == KEY_DOWN || key == '+') {
314 print_item(scroll+choice, choice, FALSE);
316 if ((choice > max_choice - 3) &&
317 (scroll + max_choice < item_no)) {
319 do_scroll(menu, &scroll, 1);
321 print_item(scroll+max_choice - 1,
322 max_choice - 1, FALSE);
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(scroll, 0, FALSE);
338 } else if (key == KEY_NPAGE) {
339 for (i = 0; (i < max_choice); i++) {
340 if (scroll + max_choice < item_no) {
341 do_scroll(menu, &scroll, 1);
342 print_item(scroll+max_choice-1,
343 max_choice - 1, FALSE);
345 if (choice + 1 < max_choice)
352 print_item(scroll + choice, choice, TRUE);
354 print_arrows(dialog, item_no, scroll,
355 box_y, box_x + item_x + 1, menu_height);
357 wnoutrefresh(dialog);
360 continue; /* wait for another key press */
367 button = ((key == KEY_LEFT ? --button : ++button) < 0)
368 ? 2 : (button > 2 ? 0 : button);
370 print_buttons(dialog, height, width, button);
379 /* save scroll info */
380 if ((f = fopen("lxdialog.scrltmp", "w")) != NULL) {
381 fprintf(f, "%d\n", scroll);
385 fprintf(stderr, "%s\n", items[(scroll + choice) * 2]);
407 fprintf(stderr, "%s \"%s\"\n",
408 items[(scroll + choice) * 2],
409 items[(scroll + choice) * 2 + 1] +
410 first_alpha(items [(scroll + choice) * 2 + 1], ""));
412 fprintf(stderr, "%s\n",
413 items[(scroll + choice) * 2]);
415 remove("lxdialog.scrltmp");
426 remove("lxdialog.scrltmp");
427 return -1; /* ESC pressed */