b2a878c936d63c793bca031b9b5d52f62b9e2e19
[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         wprintw(win, "(%c)", item_is_tag('X') ? 'X' : ' ');
45
46         wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr);
47         mvwaddch(win, choice, item_x, item_str()[0]);
48         wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
49         waddstr(win, (char *)item_str() + 1);
50         if (selected) {
51                 wmove(win, choice, check_x + 1);
52                 wrefresh(win);
53         }
54 }
55
56 /*
57  * Print the scroll indicators.
58  */
59 static void print_arrows(WINDOW * win, int choice, int item_no, int scroll,
60              int y, int x, int height)
61 {
62         wmove(win, y, x);
63
64         if (scroll > 0) {
65                 wattrset(win, dlg.uarrow.atr);
66                 waddch(win, ACS_UARROW);
67                 waddstr(win, "(-)");
68         } else {
69                 wattrset(win, dlg.menubox.atr);
70                 waddch(win, ACS_HLINE);
71                 waddch(win, ACS_HLINE);
72                 waddch(win, ACS_HLINE);
73                 waddch(win, ACS_HLINE);
74         }
75
76         y = y + height + 1;
77         wmove(win, y, x);
78
79         if ((height < item_no) && (scroll + choice < item_no - 1)) {
80                 wattrset(win, dlg.darrow.atr);
81                 waddch(win, ACS_DARROW);
82                 waddstr(win, "(+)");
83         } else {
84                 wattrset(win, dlg.menubox_border.atr);
85                 waddch(win, ACS_HLINE);
86                 waddch(win, ACS_HLINE);
87                 waddch(win, ACS_HLINE);
88                 waddch(win, ACS_HLINE);
89         }
90 }
91
92 /*
93  *  Display the termination buttons
94  */
95 static void print_buttons(WINDOW * dialog, int height, int width, int selected)
96 {
97         int x = width / 2 - 11;
98         int y = height - 2;
99
100         print_button(dialog, gettext("Select"), y, x, selected == 0);
101         print_button(dialog, gettext(" Help "), y, x + 14, selected == 1);
102
103         wmove(dialog, y, x + 1 + 14 * selected);
104         wrefresh(dialog);
105 }
106
107 /*
108  * Display a dialog box with a list of options that can be turned on or off
109  * in the style of radiolist (only one option turned on at a time).
110  */
111 int dialog_checklist(const char *title, const char *prompt, int height,
112                      int width, int list_height)
113 {
114         int i, x, y, box_x, box_y;
115         int key = 0, button = 0, choice = 0, scroll = 0, max_choice;
116         WINDOW *dialog, *list;
117
118         /* which item to highlight */
119         item_foreach() {
120                 if (item_is_tag('X'))
121                         choice = item_n();
122                 if (item_is_selected()) {
123                         choice = item_n();
124                         break;
125                 }
126         }
127
128 do_resize:
129         if (getmaxy(stdscr) < (height + 6))
130                 return -ERRDISPLAYTOOSMALL;
131         if (getmaxx(stdscr) < (width + 6))
132                 return -ERRDISPLAYTOOSMALL;
133
134         max_choice = MIN(list_height, item_count());
135
136         /* center dialog box on screen */
137         x = (COLS - width) / 2;
138         y = (LINES - height) / 2;
139
140         draw_shadow(stdscr, y, x, height, width);
141
142         dialog = newwin(height, width, y, x);
143         keypad(dialog, TRUE);
144
145         draw_box(dialog, 0, 0, height, width,
146                  dlg.dialog.atr, dlg.border.atr);
147         wattrset(dialog, dlg.border.atr);
148         mvwaddch(dialog, height - 3, 0, ACS_LTEE);
149         for (i = 0; i < width - 2; i++)
150                 waddch(dialog, ACS_HLINE);
151         wattrset(dialog, dlg.dialog.atr);
152         waddch(dialog, ACS_RTEE);
153
154         print_title(dialog, title, width);
155
156         wattrset(dialog, dlg.dialog.atr);
157         print_autowrap(dialog, prompt, width - 2, 1, 3);
158
159         list_width = width - 6;
160         box_y = height - list_height - 5;
161         box_x = (width - list_width) / 2 - 1;
162
163         /* create new window for the list */
164         list = subwin(dialog, list_height, list_width, y + box_y + 1,
165                       x + box_x + 1);
166
167         keypad(list, TRUE);
168
169         /* draw a box around the list items */
170         draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
171                  dlg.menubox_border.atr, dlg.menubox.atr);
172
173         /* Find length of longest item in order to center checklist */
174         check_x = 0;
175         item_foreach()
176                 check_x = MAX(check_x, strlen(item_str()) + 4);
177
178         check_x = (list_width - check_x) / 2;
179         item_x = check_x + 4;
180
181         if (choice >= list_height) {
182                 scroll = choice - list_height + 1;
183                 choice -= scroll;
184         }
185
186         /* Print the list */
187         for (i = 0; i < max_choice; i++) {
188                 item_set(scroll + i);
189                 print_item(list, i, i == choice);
190         }
191
192         print_arrows(dialog, choice, item_count(), scroll,
193                      box_y, box_x + check_x + 5, list_height);
194
195         print_buttons(dialog, height, width, 0);
196
197         wnoutrefresh(dialog);
198         wnoutrefresh(list);
199         doupdate();
200
201         while (key != KEY_ESC) {
202                 key = wgetch(dialog);
203
204                 for (i = 0; i < max_choice; i++) {
205                         item_set(i + scroll);
206                         if (toupper(key) == toupper(item_str()[0]))
207                                 break;
208                 }
209
210                 if (i < max_choice || key == KEY_UP || key == KEY_DOWN ||
211                     key == '+' || key == '-') {
212                         if (key == KEY_UP || key == '-') {
213                                 if (!choice) {
214                                         if (!scroll)
215                                                 continue;
216                                         /* Scroll list down */
217                                         if (list_height > 1) {
218                                                 /* De-highlight current first item */
219                                                 item_set(scroll);
220                                                 print_item(list, 0, FALSE);
221                                                 scrollok(list, TRUE);
222                                                 wscrl(list, -1);
223                                                 scrollok(list, FALSE);
224                                         }
225                                         scroll--;
226                                         item_set(scroll);
227                                         print_item(list, 0, TRUE);
228                                         print_arrows(dialog, choice, item_count(),
229                                                      scroll, box_y, box_x + check_x + 5, list_height);
230
231                                         wnoutrefresh(dialog);
232                                         wrefresh(list);
233
234                                         continue;       /* wait for another key press */
235                                 } else
236                                         i = choice - 1;
237                         } else if (key == KEY_DOWN || key == '+') {
238                                 if (choice == max_choice - 1) {
239                                         if (scroll + choice >= item_count() - 1)
240                                                 continue;
241                                         /* Scroll list up */
242                                         if (list_height > 1) {
243                                                 /* De-highlight current last item before scrolling up */
244                                                 item_set(scroll + max_choice - 1);
245                                                 print_item(list,
246                                                             max_choice - 1,
247                                                             FALSE);
248                                                 scrollok(list, TRUE);
249                                                 wscrl(list, 1);
250                                                 scrollok(list, FALSE);
251                                         }
252                                         scroll++;
253                                         item_set(scroll + max_choice - 1);
254                                         print_item(list, max_choice - 1, TRUE);
255
256                                         print_arrows(dialog, choice, item_count(),
257                                                      scroll, box_y, box_x + check_x + 5, list_height);
258
259                                         wnoutrefresh(dialog);
260                                         wrefresh(list);
261
262                                         continue;       /* wait for another key press */
263                                 } else
264                                         i = choice + 1;
265                         }
266                         if (i != choice) {
267                                 /* De-highlight current item */
268                                 item_set(scroll + choice);
269                                 print_item(list, choice, FALSE);
270                                 /* Highlight new item */
271                                 choice = i;
272                                 item_set(scroll + choice);
273                                 print_item(list, choice, TRUE);
274                                 wnoutrefresh(dialog);
275                                 wrefresh(list);
276                         }
277                         continue;       /* wait for another key press */
278                 }
279                 switch (key) {
280                 case 'H':
281                 case 'h':
282                 case '?':
283                         button = 1;
284                         /* fall-through */
285                 case 'S':
286                 case 's':
287                 case ' ':
288                 case '\n':
289                         item_foreach()
290                                 item_set_selected(0);
291                         item_set(scroll + choice);
292                         item_set_selected(1);
293                         delwin(list);
294                         delwin(dialog);
295                         return button;
296                 case TAB:
297                 case KEY_LEFT:
298                 case KEY_RIGHT:
299                         button = ((key == KEY_LEFT ? --button : ++button) < 0)
300                             ? 1 : (button > 1 ? 0 : button);
301
302                         print_buttons(dialog, height, width, button);
303                         wrefresh(dialog);
304                         break;
305                 case 'X':
306                 case 'x':
307                         key = KEY_ESC;
308                         break;
309                 case KEY_ESC:
310                         key = on_key_esc(dialog);
311                         break;
312                 case KEY_RESIZE:
313                         delwin(list);
314                         delwin(dialog);
315                         on_key_resize();
316                         goto do_resize;
317                 }
318
319                 /* Now, update everything... */
320                 doupdate();
321         }
322         delwin(list);
323         delwin(dialog);
324         return key;             /* ESC pressed */
325 }