3fb681fb9632d96f9cd2839039311c82ea70bc1f
[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, checkflag;
27
28 /*
29  * Print list item
30  */
31 static void print_item(WINDOW * win, const char *item, int status, int choice,
32                        int selected)
33 {
34         int i;
35
36         /* Clear 'residue' of last item */
37         wattrset(win, menubox_attr);
38         wmove(win, choice, 0);
39         for (i = 0; i < list_width; i++)
40                 waddch(win, ' ');
41
42         wmove(win, choice, check_x);
43         wattrset(win, selected ? check_selected_attr : check_attr);
44         if (checkflag == FLAG_CHECK)
45                 wprintw(win, "[%c]", status ? 'X' : ' ');
46         else
47                 wprintw(win, "(%c)", status ? 'X' : ' ');
48
49         wattrset(win, selected ? tag_selected_attr : tag_attr);
50         mvwaddch(win, choice, item_x, item[0]);
51         wattrset(win, selected ? item_selected_attr : item_attr);
52         waddstr(win, (char *)item + 1);
53         if (selected) {
54                 wmove(win, choice, check_x + 1);
55                 wrefresh(win);
56         }
57 }
58
59 /*
60  * Print the scroll indicators.
61  */
62 static void print_arrows(WINDOW * win, int choice, int item_no, int scroll,
63              int y, int x, int height)
64 {
65         wmove(win, y, x);
66
67         if (scroll > 0) {
68                 wattrset(win, uarrow_attr);
69                 waddch(win, ACS_UARROW);
70                 waddstr(win, "(-)");
71         } else {
72                 wattrset(win, menubox_attr);
73                 waddch(win, ACS_HLINE);
74                 waddch(win, ACS_HLINE);
75                 waddch(win, ACS_HLINE);
76                 waddch(win, ACS_HLINE);
77         }
78
79         y = y + height + 1;
80         wmove(win, y, x);
81
82         if ((height < item_no) && (scroll + choice < item_no - 1)) {
83                 wattrset(win, darrow_attr);
84                 waddch(win, ACS_DARROW);
85                 waddstr(win, "(+)");
86         } else {
87                 wattrset(win, menubox_border_attr);
88                 waddch(win, ACS_HLINE);
89                 waddch(win, ACS_HLINE);
90                 waddch(win, ACS_HLINE);
91                 waddch(win, ACS_HLINE);
92         }
93 }
94
95 /*
96  *  Display the termination buttons
97  */
98 static void print_buttons(WINDOW * dialog, int height, int width, int selected)
99 {
100         int x = width / 2 - 11;
101         int y = height - 2;
102
103         print_button(dialog, "Select", y, x, selected == 0);
104         print_button(dialog, " Help ", y, x + 14, selected == 1);
105
106         wmove(dialog, y, x + 1 + 14 * selected);
107         wrefresh(dialog);
108 }
109
110 /*
111  * Display a dialog box with a list of options that can be turned on or off
112  * The `flag' parameter is used to select between radiolist and checklist.
113  */
114 int dialog_checklist(const char *title, const char *prompt, int height,
115                      int width, int list_height, int item_no,
116                      const char *const *items, int flag)
117 {
118         int i, x, y, box_x, box_y;
119         int key = 0, button = 0, choice = 0, scroll = 0, max_choice, *status;
120         WINDOW *dialog, *list;
121
122         checkflag = flag;
123
124         /* Allocate space for storing item on/off status */
125         if ((status = malloc(sizeof(int) * item_no)) == NULL) {
126                 endwin();
127                 fprintf(stderr,
128                         "\nCan't allocate memory in dialog_checklist().\n");
129                 exit(-1);
130         }
131
132         /* Initializes status */
133         for (i = 0; i < item_no; i++) {
134                 status[i] = !strcasecmp(items[i * 3 + 2], "on");
135                 if ((!choice && status[i])
136                     || !strcasecmp(items[i * 3 + 2], "selected"))
137                         choice = i + 1;
138         }
139         if (choice)
140                 choice--;
141
142         max_choice = MIN(list_height, item_no);
143
144         /* center dialog box on screen */
145         x = (COLS - width) / 2;
146         y = (LINES - height) / 2;
147
148         draw_shadow(stdscr, y, x, height, width);
149
150         dialog = newwin(height, width, y, x);
151         keypad(dialog, TRUE);
152
153         draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
154         wattrset(dialog, border_attr);
155         mvwaddch(dialog, height - 3, 0, ACS_LTEE);
156         for (i = 0; i < width - 2; i++)
157                 waddch(dialog, ACS_HLINE);
158         wattrset(dialog, dialog_attr);
159         waddch(dialog, ACS_RTEE);
160
161         print_title(dialog, title, width);
162
163         wattrset(dialog, dialog_attr);
164         print_autowrap(dialog, prompt, width - 2, 1, 3);
165
166         list_width = width - 6;
167         box_y = height - list_height - 5;
168         box_x = (width - list_width) / 2 - 1;
169
170         /* create new window for the list */
171         list = subwin(dialog, list_height, list_width, y + box_y + 1,
172                       x + box_x + 1);
173
174         keypad(list, TRUE);
175
176         /* draw a box around the list items */
177         draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
178                  menubox_border_attr, menubox_attr);
179
180         /* Find length of longest item in order to center checklist */
181         check_x = 0;
182         for (i = 0; i < item_no; i++)
183                 check_x = MAX(check_x, +strlen(items[i * 3 + 1]) + 4);
184
185         check_x = (list_width - check_x) / 2;
186         item_x = check_x + 4;
187
188         if (choice >= list_height) {
189                 scroll = choice - list_height + 1;
190                 choice -= scroll;
191         }
192
193         /* Print the list */
194         for (i = 0; i < max_choice; i++) {
195                 print_item(list, items[(scroll + i) * 3 + 1],
196                            status[i + scroll], i, i == choice);
197         }
198
199         print_arrows(dialog, choice, item_no, scroll,
200                      box_y, box_x + check_x + 5, list_height);
201
202         print_buttons(dialog, height, width, 0);
203
204         wnoutrefresh(list);
205         wnoutrefresh(dialog);
206         doupdate();
207
208         while (key != ESC) {
209                 key = wgetch(dialog);
210
211                 for (i = 0; i < max_choice; i++)
212                         if (toupper(key) ==
213                             toupper(items[(scroll + i) * 3 + 1][0]))
214                                 break;
215
216                 if (i < max_choice || key == KEY_UP || key == KEY_DOWN ||
217                     key == '+' || key == '-') {
218                         if (key == KEY_UP || key == '-') {
219                                 if (!choice) {
220                                         if (!scroll)
221                                                 continue;
222                                         /* Scroll list down */
223                                         if (list_height > 1) {
224                                                 /* De-highlight current first item */
225                                                 print_item(list, items[scroll * 3 + 1],
226                                                            status[scroll], 0, FALSE);
227                                                 scrollok(list, TRUE);
228                                                 wscrl(list, -1);
229                                                 scrollok(list, FALSE);
230                                         }
231                                         scroll--;
232                                         print_item(list, items[scroll * 3 + 1], status[scroll], 0, TRUE);
233                                         wnoutrefresh(list);
234
235                                         print_arrows(dialog, choice, item_no,
236                                                      scroll, box_y, box_x + check_x + 5, list_height);
237
238                                         wrefresh(dialog);
239
240                                         continue;       /* wait for another key press */
241                                 } else
242                                         i = choice - 1;
243                         } else if (key == KEY_DOWN || key == '+') {
244                                 if (choice == max_choice - 1) {
245                                         if (scroll + choice >= item_no - 1)
246                                                 continue;
247                                         /* Scroll list up */
248                                         if (list_height > 1) {
249                                                 /* De-highlight current last item before scrolling up */
250                                                 print_item(list, items[(scroll + max_choice - 1) * 3 + 1],
251                                                            status[scroll + max_choice - 1],
252                                                            max_choice - 1, FALSE);
253                                                 scrollok(list, TRUE);
254                                                 wscrl(list, 1);
255                                                 scrollok(list, FALSE);
256                                         }
257                                         scroll++;
258                                         print_item(list, items[(scroll + max_choice - 1) * 3 + 1],
259                                                    status[scroll + max_choice - 1], max_choice - 1, TRUE);
260                                         wnoutrefresh(list);
261
262                                         print_arrows(dialog, choice, item_no,
263                                                      scroll, box_y, box_x + check_x + 5, list_height);
264
265                                         wrefresh(dialog);
266
267                                         continue;       /* wait for another key press */
268                                 } else
269                                         i = choice + 1;
270                         }
271                         if (i != choice) {
272                                 /* De-highlight current item */
273                                 print_item(list, items[(scroll + choice) * 3 + 1],
274                                            status[scroll + choice], choice, FALSE);
275                                 /* Highlight new item */
276                                 choice = i;
277                                 print_item(list, items[(scroll + choice) * 3 + 1],
278                                            status[scroll + choice], choice, TRUE);
279                                 wnoutrefresh(list);
280                                 wrefresh(dialog);
281                         }
282                         continue;       /* wait for another key press */
283                 }
284                 switch (key) {
285                 case 'H':
286                 case 'h':
287                 case '?':
288                         fprintf(stderr, "%s", items[(scroll + choice) * 3]);
289                         delwin(dialog);
290                         free(status);
291                         return 1;
292                 case TAB:
293                 case KEY_LEFT:
294                 case KEY_RIGHT:
295                         button = ((key == KEY_LEFT ? --button : ++button) < 0)
296                             ? 1 : (button > 1 ? 0 : button);
297
298                         print_buttons(dialog, height, width, button);
299                         wrefresh(dialog);
300                         break;
301                 case 'S':
302                 case 's':
303                 case ' ':
304                 case '\n':
305                         if (!button) {
306                                 if (flag == FLAG_CHECK) {
307                                         status[scroll + choice] = !status[scroll + choice];
308                                         wmove(list, choice, check_x);
309                                         wattrset(list, check_selected_attr);
310                                         wprintw(list, "[%c]", status[scroll + choice] ? 'X' : ' ');
311                                 } else {
312                                         if (!status[scroll + choice]) {
313                                                 for (i = 0; i < item_no; i++)
314                                                         status[i] = 0;
315                                                 status[scroll + choice] = 1;
316                                                 for (i = 0; i < max_choice; i++)
317                                                         print_item(list, items[(scroll + i) * 3 + 1],
318                                                                    status[scroll + i], i, i == choice);
319                                         }
320                                 }
321                                 wnoutrefresh(list);
322                                 wrefresh(dialog);
323
324                                 for (i = 0; i < item_no; i++) {
325                                         if (status[i]) {
326                                                 if (flag == FLAG_CHECK) {
327                                                         fprintf(stderr, "\"%s\" ", items[i * 3]);
328                                                 } else {
329                                                         fprintf(stderr, "%s", items[i * 3]);
330                                                 }
331
332                                         }
333                                 }
334                         } else
335                                 fprintf(stderr, "%s", items[(scroll + choice) * 3]);
336                         delwin(dialog);
337                         free(status);
338                         return button;
339                 case 'X':
340                 case 'x':
341                         key = ESC;
342                 case ESC:
343                         break;
344                 }
345
346                 /* Now, update everything... */
347                 doupdate();
348         }
349
350         delwin(dialog);
351         free(status);
352         return -1;              /* ESC pressed */
353 }