Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
[linux-2.6.git] / scripts / kconfig / lxdialog / checklist.c
1 /*
2  *  checklist.c -- implements the checklist box
3  *
4  *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
5  *     Stuart Herbert - S.Herbert@sheffield.ac.uk: radiolist extension
6  *     Alessandro Rubini - rubini@ipvvis.unipv.it: merged the two
7  *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
8  *
9  *  This program is free software; you can redistribute it and/or
10  *  modify it under the terms of the GNU General Public License
11  *  as published by the Free Software Foundation; either version 2
12  *  of the License, or (at your option) any later version.
13  *
14  *  This program is distributed in the hope that it will be useful,
15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  *  GNU General Public License for more details.
18  *
19  *  You should have received a copy of the GNU General Public License
20  *  along with this program; if not, write to the Free Software
21  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22  */
23
24 #include "dialog.h"
25
26 static int list_width, check_x, item_x;
27
28 /*
29  * Print list item
30  */
31 static void print_item(WINDOW * win, int choice, int selected)
32 {
33         int i;
34
35         /* Clear 'residue' of last item */
36         wattrset(win, dlg.menubox.atr);
37         wmove(win, choice, 0);
38         for (i = 0; i < list_width; i++)
39                 waddch(win, ' ');
40
41         wmove(win, choice, check_x);
42         wattrset(win, selected ? dlg.check_selected.atr
43                  : dlg.check.atr);
44         if (!item_is_tag(':'))
45                 wprintw(win, "(%c)", item_is_tag('X') ? 'X' : ' ');
46
47         wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr);
48         mvwaddch(win, choice, item_x, item_str()[0]);
49         wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
50         waddstr(win, (char *)item_str() + 1);
51         if (selected) {
52                 wmove(win, choice, check_x + 1);
53                 wrefresh(win);
54         }
55 }
56
57 /*
58  * Print the scroll indicators.
59  */
60 static void print_arrows(WINDOW * win, int choice, int item_no, int scroll,
61              int y, int x, int height)
62 {
63         wmove(win, y, x);
64
65         if (scroll > 0) {
66                 wattrset(win, dlg.uarrow.atr);
67                 waddch(win, ACS_UARROW);
68                 waddstr(win, "(-)");
69         } else {
70                 wattrset(win, dlg.menubox.atr);
71                 waddch(win, ACS_HLINE);
72                 waddch(win, ACS_HLINE);
73                 waddch(win, ACS_HLINE);
74                 waddch(win, ACS_HLINE);
75         }
76
77         y = y + height + 1;
78         wmove(win, y, x);
79
80         if ((height < item_no) && (scroll + choice < item_no - 1)) {
81                 wattrset(win, dlg.darrow.atr);
82                 waddch(win, ACS_DARROW);
83                 waddstr(win, "(+)");
84         } else {
85                 wattrset(win, dlg.menubox_border.atr);
86                 waddch(win, ACS_HLINE);
87                 waddch(win, ACS_HLINE);
88                 waddch(win, ACS_HLINE);
89                 waddch(win, ACS_HLINE);
90         }
91 }
92
93 /*
94  *  Display the termination buttons
95  */
96 static void print_buttons(WINDOW * dialog, int height, int width, int selected)
97 {
98         int x = width / 2 - 11;
99         int y = height - 2;
100
101         print_button(dialog, gettext("Select"), y, x, selected == 0);
102         print_button(dialog, gettext(" Help "), y, x + 14, selected == 1);
103
104         wmove(dialog, y, x + 1 + 14 * selected);
105         wrefresh(dialog);
106 }
107
108 /*
109  * Display a dialog box with a list of options that can be turned on or off
110  * in the style of radiolist (only one option turned on at a time).
111  */
112 int dialog_checklist(const char *title, const char *prompt, int height,
113                      int width, int list_height)
114 {
115         int i, x, y, box_x, box_y;
116         int key = 0, button = 0, choice = 0, scroll = 0, max_choice;
117         WINDOW *dialog, *list;
118
119         /* which item to highlight */
120         item_foreach() {
121                 if (item_is_tag('X'))
122                         choice = item_n();
123                 if (item_is_selected()) {
124                         choice = item_n();
125                         break;
126                 }
127         }
128
129 do_resize:
130         if (getmaxy(stdscr) < (height + 6))
131                 return -ERRDISPLAYTOOSMALL;
132         if (getmaxx(stdscr) < (width + 6))
133                 return -ERRDISPLAYTOOSMALL;
134
135         max_choice = MIN(list_height, item_count());
136
137         /* center dialog box on screen */
138         x = (COLS - width) / 2;
139         y = (LINES - height) / 2;
140
141         draw_shadow(stdscr, y, x, height, width);
142
143         dialog = newwin(height, width, y, x);
144         keypad(dialog, TRUE);
145
146         draw_box(dialog, 0, 0, height, width,
147                  dlg.dialog.atr, dlg.border.atr);
148         wattrset(dialog, dlg.border.atr);
149         mvwaddch(dialog, height - 3, 0, ACS_LTEE);
150         for (i = 0; i < width - 2; i++)
151                 waddch(dialog, ACS_HLINE);
152         wattrset(dialog, dlg.dialog.atr);
153         waddch(dialog, ACS_RTEE);
154
155         print_title(dialog, title, width);
156
157         wattrset(dialog, dlg.dialog.atr);
158         print_autowrap(dialog, prompt, width - 2, 1, 3);
159
160         list_width = width - 6;
161         box_y = height - list_height - 5;
162         box_x = (width - list_width) / 2 - 1;
163
164         /* create new window for the list */
165         list = subwin(dialog, list_height, list_width, y + box_y + 1,
166                       x + box_x + 1);
167
168         keypad(list, TRUE);
169
170         /* draw a box around the list items */
171         draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
172                  dlg.menubox_border.atr, dlg.menubox.atr);
173
174         /* Find length of longest item in order to center checklist */
175         check_x = 0;
176         item_foreach()
177                 check_x = MAX(check_x, strlen(item_str()) + 4);
178
179         check_x = (list_width - check_x) / 2;
180         item_x = check_x + 4;
181
182         if (choice >= list_height) {
183                 scroll = choice - list_height + 1;
184                 choice -= scroll;
185         }
186
187         /* Print the list */
188         for (i = 0; i < max_choice; i++) {
189                 item_set(scroll + i);
190                 print_item(list, i, i == choice);
191         }
192
193         print_arrows(dialog, choice, item_count(), scroll,
194                      box_y, box_x + check_x + 5, list_height);
195
196         print_buttons(dialog, height, width, 0);
197
198         wnoutrefresh(dialog);
199         wnoutrefresh(list);
200         doupdate();
201
202         while (key != KEY_ESC) {
203                 key = wgetch(dialog);
204
205                 for (i = 0; i < max_choice; i++) {
206                         item_set(i + scroll);
207                         if (toupper(key) == toupper(item_str()[0]))
208                                 break;
209                 }
210
211                 if (i < max_choice || key == KEY_UP || key == KEY_DOWN ||
212                     key == '+' || key == '-') {
213                         if (key == KEY_UP || key == '-') {
214                                 if (!choice) {
215                                         if (!scroll)
216                                                 continue;
217                                         /* Scroll list down */
218                                         if (list_height > 1) {
219                                                 /* De-highlight current first item */
220                                                 item_set(scroll);
221                                                 print_item(list, 0, FALSE);
222                                                 scrollok(list, TRUE);
223                                                 wscrl(list, -1);
224                                                 scrollok(list, FALSE);
225                                         }
226                                         scroll--;
227                                         item_set(scroll);
228                                         print_item(list, 0, TRUE);
229                                         print_arrows(dialog, choice, item_count(),
230                                                      scroll, box_y, box_x + check_x + 5, list_height);
231
232                                         wnoutrefresh(dialog);
233                                         wrefresh(list);
234
235                                         continue;       /* wait for another key press */
236                                 } else
237                                         i = choice - 1;
238                         } else if (key == KEY_DOWN || key == '+') {
239                                 if (choice == max_choice - 1) {
240                                         if (scroll + choice >= item_count() - 1)
241                                                 continue;
242                                         /* Scroll list up */
243                                         if (list_height > 1) {
244                                                 /* De-highlight current last item before scrolling up */
245                                                 item_set(scroll + max_choice - 1);
246                                                 print_item(list,
247                                                             max_choice - 1,
248                                                             FALSE);
249                                                 scrollok(list, TRUE);
250                                                 wscrl(list, 1);
251                                                 scrollok(list, FALSE);
252                                         }
253                                         scroll++;
254                                         item_set(scroll + max_choice - 1);
255                                         print_item(list, max_choice - 1, TRUE);
256
257                                         print_arrows(dialog, choice, item_count(),
258                                                      scroll, box_y, box_x + check_x + 5, list_height);
259
260                                         wnoutrefresh(dialog);
261                                         wrefresh(list);
262
263                                         continue;       /* wait for another key press */
264                                 } else
265                                         i = choice + 1;
266                         }
267                         if (i != choice) {
268                                 /* De-highlight current item */
269                                 item_set(scroll + choice);
270                                 print_item(list, choice, FALSE);
271                                 /* Highlight new item */
272                                 choice = i;
273                                 item_set(scroll + choice);
274                                 print_item(list, choice, TRUE);
275                                 wnoutrefresh(dialog);
276                                 wrefresh(list);
277                         }
278                         continue;       /* wait for another key press */
279                 }
280                 switch (key) {
281                 case 'H':
282                 case 'h':
283                 case '?':
284                         button = 1;
285                         /* fall-through */
286                 case 'S':
287                 case 's':
288                 case ' ':
289                 case '\n':
290                         item_foreach()
291                                 item_set_selected(0);
292                         item_set(scroll + choice);
293                         item_set_selected(1);
294                         delwin(list);
295                         delwin(dialog);
296                         return button;
297                 case TAB:
298                 case KEY_LEFT:
299                 case KEY_RIGHT:
300                         button = ((key == KEY_LEFT ? --button : ++button) < 0)
301                             ? 1 : (button > 1 ? 0 : button);
302
303                         print_buttons(dialog, height, width, button);
304                         wrefresh(dialog);
305                         break;
306                 case 'X':
307                 case 'x':
308                         key = KEY_ESC;
309                         break;
310                 case KEY_ESC:
311                         key = on_key_esc(dialog);
312                         break;
313                 case KEY_RESIZE:
314                         delwin(list);
315                         delwin(dialog);
316                         on_key_resize();
317                         goto do_resize;
318                 }
319
320                 /* Now, update everything... */
321                 doupdate();
322         }
323         delwin(list);
324         delwin(dialog);
325         return key;             /* ESC pressed */
326 }