kconfig/menuconfig: lxdialog is now built-in
[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, "Select", y, x, selected == 0);
101         print_button(dialog, " 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         max_choice = MIN(list_height, item_count());
129
130         /* center dialog box on screen */
131         x = (COLS - width) / 2;
132         y = (LINES - height) / 2;
133
134         draw_shadow(stdscr, y, x, height, width);
135
136         dialog = newwin(height, width, y, x);
137         keypad(dialog, TRUE);
138
139         draw_box(dialog, 0, 0, height, width,
140                  dlg.dialog.atr, dlg.border.atr);
141         wattrset(dialog, dlg.border.atr);
142         mvwaddch(dialog, height - 3, 0, ACS_LTEE);
143         for (i = 0; i < width - 2; i++)
144                 waddch(dialog, ACS_HLINE);
145         wattrset(dialog, dlg.dialog.atr);
146         waddch(dialog, ACS_RTEE);
147
148         print_title(dialog, title, width);
149
150         wattrset(dialog, dlg.dialog.atr);
151         print_autowrap(dialog, prompt, width - 2, 1, 3);
152
153         list_width = width - 6;
154         box_y = height - list_height - 5;
155         box_x = (width - list_width) / 2 - 1;
156
157         /* create new window for the list */
158         list = subwin(dialog, list_height, list_width, y + box_y + 1,
159                       x + box_x + 1);
160
161         keypad(list, TRUE);
162
163         /* draw a box around the list items */
164         draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
165                  dlg.menubox_border.atr, dlg.menubox.atr);
166
167         /* Find length of longest item in order to center checklist */
168         check_x = 0;
169         item_foreach()
170                 check_x = MAX(check_x, strlen(item_str()) + 4);
171
172         check_x = (list_width - check_x) / 2;
173         item_x = check_x + 4;
174
175         if (choice >= list_height) {
176                 scroll = choice - list_height + 1;
177                 choice -= scroll;
178         }
179
180         /* Print the list */
181         for (i = 0; i < max_choice; i++) {
182                 item_set(scroll + i);
183                 print_item(list, i, i == choice);
184         }
185
186         print_arrows(dialog, choice, item_count(), scroll,
187                      box_y, box_x + check_x + 5, list_height);
188
189         print_buttons(dialog, height, width, 0);
190
191         wnoutrefresh(dialog);
192         wnoutrefresh(list);
193         doupdate();
194
195         while (key != ESC) {
196                 key = wgetch(dialog);
197
198                 for (i = 0; i < max_choice; i++) {
199                         item_set(i + scroll);
200                         if (toupper(key) == toupper(item_str()[0]))
201                                 break;
202                 }
203
204                 if (i < max_choice || key == KEY_UP || key == KEY_DOWN ||
205                     key == '+' || key == '-') {
206                         if (key == KEY_UP || key == '-') {
207                                 if (!choice) {
208                                         if (!scroll)
209                                                 continue;
210                                         /* Scroll list down */
211                                         if (list_height > 1) {
212                                                 /* De-highlight current first item */
213                                                 item_set(scroll);
214                                                 print_item(list, 0, FALSE);
215                                                 scrollok(list, TRUE);
216                                                 wscrl(list, -1);
217                                                 scrollok(list, FALSE);
218                                         }
219                                         scroll--;
220                                         item_set(scroll);
221                                         print_item(list, 0, TRUE);
222                                         print_arrows(dialog, choice, item_count(),
223                                                      scroll, box_y, box_x + check_x + 5, list_height);
224
225                                         wnoutrefresh(dialog);
226                                         wrefresh(list);
227
228                                         continue;       /* wait for another key press */
229                                 } else
230                                         i = choice - 1;
231                         } else if (key == KEY_DOWN || key == '+') {
232                                 if (choice == max_choice - 1) {
233                                         if (scroll + choice >= item_count() - 1)
234                                                 continue;
235                                         /* Scroll list up */
236                                         if (list_height > 1) {
237                                                 /* De-highlight current last item before scrolling up */
238                                                 item_set(scroll + max_choice - 1);
239                                                 print_item(list,
240                                                             max_choice - 1,
241                                                             FALSE);
242                                                 scrollok(list, TRUE);
243                                                 wscrl(list, 1);
244                                                 scrollok(list, FALSE);
245                                         }
246                                         scroll++;
247                                         item_set(scroll + max_choice - 1);
248                                         print_item(list, max_choice - 1, TRUE);
249
250                                         print_arrows(dialog, choice, item_count(),
251                                                      scroll, box_y, box_x + check_x + 5, list_height);
252
253                                         wnoutrefresh(dialog);
254                                         wrefresh(list);
255
256                                         continue;       /* wait for another key press */
257                                 } else
258                                         i = choice + 1;
259                         }
260                         if (i != choice) {
261                                 /* De-highlight current item */
262                                 item_set(scroll + choice);
263                                 print_item(list, choice, FALSE);
264                                 /* Highlight new item */
265                                 choice = i;
266                                 item_set(scroll + choice);
267                                 print_item(list, choice, TRUE);
268                                 wnoutrefresh(dialog);
269                                 wrefresh(list);
270                         }
271                         continue;       /* wait for another key press */
272                 }
273                 switch (key) {
274                 case 'H':
275                 case 'h':
276                 case '?':
277                         button = 1;
278                         /* fall-through */
279                 case 'S':
280                 case 's':
281                 case ' ':
282                 case '\n':
283                         item_foreach()
284                                 item_set_selected(0);
285                         item_set(scroll + choice);
286                         item_set_selected(1);
287                         delwin(list);
288                         delwin(dialog);
289                         return button;
290                 case TAB:
291                 case KEY_LEFT:
292                 case KEY_RIGHT:
293                         button = ((key == KEY_LEFT ? --button : ++button) < 0)
294                             ? 1 : (button > 1 ? 0 : button);
295
296                         print_buttons(dialog, height, width, button);
297                         wrefresh(dialog);
298                         break;
299                 case 'X':
300                 case 'x':
301                         key = ESC;
302                 case ESC:
303                         break;
304                 }
305
306                 /* Now, update everything... */
307                 doupdate();
308         }
309         delwin(list);
310         delwin(dialog);
311         return 255;             /* ESC pressed */
312 }