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 line_y
,
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
- item_x
] = '\0';
74 j
= first_alpha(menu_item
, "YyNnMmHh");
76 /* Clear 'residue' of last item */
77 wattrset(win
, dlg
.menubox
.atr
);
78 wmove(win
, line_y
, 0);
82 for (i
= 0; i
< menu_width
; i
++)
88 wattrset(win
, selected
? dlg
.item_selected
.atr
: dlg
.item
.atr
);
89 mvwaddstr(win
, line_y
, item_x
, menu_item
);
91 wattrset(win
, selected
? dlg
.tag_key_selected
.atr
93 mvwaddch(win
, line_y
, item_x
+ j
, menu_item
[j
]);
96 wmove(win
, line_y
, item_x
+ 1);
102 #define print_item(index, choice, selected) \
105 do_print_item(menu, item_str(), choice, selected, !item_is_tag(':')); \
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 - 28;
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);
163 print_button(win
, " Save ", y
, x
+ 36, selected
== 3);
164 print_button(win
, " Load ", y
, x
+ 48, selected
== 4);
166 wmove(win
, y
, x
+ 1 + 12 * selected
);
170 /* scroll up n lines (n may be negative) */
171 static void do_scroll(WINDOW
*win
, int *scroll
, int n
)
176 scrollok(win
, FALSE
);
177 *scroll
= *scroll
+ n
;
182 * Display a menu for choosing among a number of options
184 int dialog_menu(const char *title
, const char *prompt
,
185 const void *selected
, int *s_scroll
)
187 int i
, j
, x
, y
, box_x
, box_y
;
188 int height
, width
, menu_height
;
189 int key
= 0, button
= 0, scroll
= 0, choice
= 0;
190 int first_item
= 0, max_choice
;
191 WINDOW
*dialog
, *menu
;
194 height
= getmaxy(stdscr
);
195 width
= getmaxx(stdscr
);
196 if (height
< MENUBOX_HEIGTH_MIN
|| width
< MENUBOX_WIDTH_MIN
)
197 return -ERRDISPLAYTOOSMALL
;
201 menu_height
= height
- 10;
203 max_choice
= MIN(menu_height
, item_count());
205 /* center dialog box on screen */
206 x
= (getmaxx(stdscr
) - width
) / 2;
207 y
= (getmaxy(stdscr
) - height
) / 2;
209 draw_shadow(stdscr
, y
, x
, height
, width
);
211 dialog
= newwin(height
, width
, y
, x
);
212 keypad(dialog
, TRUE
);
214 draw_box(dialog
, 0, 0, height
, width
,
215 dlg
.dialog
.atr
, dlg
.border
.atr
);
216 wattrset(dialog
, dlg
.border
.atr
);
217 mvwaddch(dialog
, height
- 3, 0, ACS_LTEE
);
218 for (i
= 0; i
< width
- 2; i
++)
219 waddch(dialog
, ACS_HLINE
);
220 wattrset(dialog
, dlg
.dialog
.atr
);
221 wbkgdset(dialog
, dlg
.dialog
.atr
& A_COLOR
);
222 waddch(dialog
, ACS_RTEE
);
224 print_title(dialog
, title
, width
);
226 wattrset(dialog
, dlg
.dialog
.atr
);
227 print_autowrap(dialog
, prompt
, width
- 2, 1, 3);
229 menu_width
= width
- 6;
230 box_y
= height
- menu_height
- 5;
231 box_x
= (width
- menu_width
) / 2 - 1;
233 /* create new window for the menu */
234 menu
= subwin(dialog
, menu_height
, menu_width
,
235 y
+ box_y
+ 1, x
+ box_x
+ 1);
238 /* draw a box around the menu items */
239 draw_box(dialog
, box_y
, box_x
, menu_height
+ 2, menu_width
+ 2,
240 dlg
.menubox_border
.atr
, dlg
.menubox
.atr
);
242 if (menu_width
>= 80)
243 item_x
= (menu_width
- 70) / 2;
247 /* Set choice to default item */
249 if (selected
&& (selected
== item_data()))
251 /* get the saved scroll info */
253 if ((scroll
<= choice
) && (scroll
+ max_choice
> choice
) &&
254 (scroll
>= 0) && (scroll
+ max_choice
<= item_count())) {
256 choice
= choice
- scroll
;
260 if ((choice
>= max_choice
)) {
261 if (choice
>= item_count() - max_choice
/ 2)
262 scroll
= first_item
= item_count() - max_choice
;
264 scroll
= first_item
= choice
- max_choice
/ 2;
265 choice
= choice
- scroll
;
269 for (i
= 0; i
< max_choice
; i
++) {
270 print_item(first_item
+ i
, i
, i
== choice
);
275 print_arrows(dialog
, item_count(), scroll
,
276 box_y
, box_x
+ item_x
+ 1, menu_height
);
278 print_buttons(dialog
, height
, width
, 0);
279 wmove(menu
, choice
, item_x
+ 1);
282 while (key
!= KEY_ESC
) {
285 if (key
< 256 && isalpha(key
))
288 if (strchr("ynmh", key
))
291 for (i
= choice
+ 1; i
< max_choice
; i
++) {
292 item_set(scroll
+ i
);
293 j
= first_alpha(item_str(), "YyNnMmHh");
294 if (key
== tolower(item_str()[j
]))
298 for (i
= 0; i
< max_choice
; i
++) {
299 item_set(scroll
+ i
);
300 j
= first_alpha(item_str(), "YyNnMmHh");
301 if (key
== tolower(item_str()[j
]))
306 if (item_count() != 0 &&
308 key
== KEY_UP
|| key
== KEY_DOWN
||
309 key
== '-' || key
== '+' ||
310 key
== KEY_PPAGE
|| key
== KEY_NPAGE
)) {
311 /* Remove highligt of current item */
312 print_item(scroll
+ choice
, choice
, FALSE
);
314 if (key
== KEY_UP
|| key
== '-') {
315 if (choice
< 2 && scroll
) {
316 /* Scroll menu down */
317 do_scroll(menu
, &scroll
, -1);
319 print_item(scroll
, 0, FALSE
);
321 choice
= MAX(choice
- 1, 0);
323 } else if (key
== KEY_DOWN
|| key
== '+') {
324 print_item(scroll
+choice
, choice
, FALSE
);
326 if ((choice
> max_choice
- 3) &&
327 (scroll
+ max_choice
< item_count())) {
329 do_scroll(menu
, &scroll
, 1);
331 print_item(scroll
+max_choice
- 1,
332 max_choice
- 1, FALSE
);
334 choice
= MIN(choice
+ 1, max_choice
- 1);
336 } else if (key
== KEY_PPAGE
) {
337 scrollok(menu
, TRUE
);
338 for (i
= 0; (i
< max_choice
); i
++) {
340 do_scroll(menu
, &scroll
, -1);
341 print_item(scroll
, 0, FALSE
);
348 } else if (key
== KEY_NPAGE
) {
349 for (i
= 0; (i
< max_choice
); i
++) {
350 if (scroll
+ max_choice
< item_count()) {
351 do_scroll(menu
, &scroll
, 1);
352 print_item(scroll
+max_choice
-1,
353 max_choice
- 1, FALSE
);
355 if (choice
+ 1 < max_choice
)
362 print_item(scroll
+ choice
, choice
, TRUE
);
364 print_arrows(dialog
, item_count(), scroll
,
365 box_y
, box_x
+ item_x
+ 1, menu_height
);
367 wnoutrefresh(dialog
);
370 continue; /* wait for another key press */
377 button
= ((key
== KEY_LEFT
? --button
: ++button
) < 0)
378 ? 4 : (button
> 4 ? 0 : button
);
380 print_buttons(dialog
, height
, width
, button
);
393 /* save scroll info */
397 item_set(scroll
+ choice
);
398 item_set_selected(1);
425 key
= on_key_esc(menu
);
436 return key
; /* ESC pressed */