kconfig/lxdialog: refactor color support
[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, const char *item, int status, int choice,
32                        int selected)
33 {
34         int i;
35
36         /* Clear 'residue' of last item */
37         wattrset(win, dlg.menubox.atr);
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 ? dlg.check_selected.atr
44                  : dlg.check.atr);
45         wprintw(win, "(%c)", status ? 'X' : ' ');
46
47         wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr);
48         mvwaddch(win, choice, item_x, item[0]);
49         wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
50         waddstr(win, (char *)item + 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, "Select", y, x, selected == 0);
102         print_button(dialog, " 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, int item_no,
114                      const char *const *items)
115 {
116         int i, x, y, box_x, box_y;
117         int key = 0, button = 0, choice = 0, scroll = 0, max_choice, *status;
118         WINDOW *dialog, *list;
119
120         /* Allocate space for storing item on/off status */
121         if ((status = malloc(sizeof(int) * item_no)) == NULL) {
122                 endwin();
123                 fprintf(stderr,
124                         "\nCan't allocate memory in dialog_checklist().\n");
125                 exit(-1);
126         }
127
128         /* Initializes status */
129         for (i = 0; i < item_no; i++) {
130                 status[i] = !strcasecmp(items[i * 3 + 2], "on");
131                 if ((!choice && status[i])
132                     || !strcasecmp(items[i * 3 + 2], "selected"))
133                         choice = i + 1;
134         }
135         if (choice)
136                 choice--;
137
138         max_choice = MIN(list_height, item_no);
139
140         /* center dialog box on screen */
141         x = (COLS - width) / 2;
142         y = (LINES - height) / 2;
143
144         draw_shadow(stdscr, y, x, height, width);
145
146         dialog = newwin(height, width, y, x);
147         keypad(dialog, TRUE);
148
149         draw_box(dialog, 0, 0, height, width,
150                  dlg.dialog.atr, dlg.border.atr);
151         wattrset(dialog, dlg.border.atr);
152         mvwaddch(dialog, height - 3, 0, ACS_LTEE);
153         for (i = 0; i < width - 2; i++)
154                 waddch(dialog, ACS_HLINE);
155         wattrset(dialog, dlg.dialog.atr);
156         waddch(dialog, ACS_RTEE);
157
158         print_title(dialog, title, width);
159
160         wattrset(dialog, dlg.dialog.atr);
161         print_autowrap(dialog, prompt, width - 2, 1, 3);
162
163         list_width = width - 6;
164         box_y = height - list_height - 5;
165         box_x = (width - list_width) / 2 - 1;
166
167         /* create new window for the list */
168         list = subwin(dialog, list_height, list_width, y + box_y + 1,
169                       x + box_x + 1);
170
171         keypad(list, TRUE);
172
173         /* draw a box around the list items */
174         draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
175                  dlg.menubox_border.atr, dlg.menubox.atr);
176
177         /* Find length of longest item in order to center checklist */
178         check_x = 0;
179         for (i = 0; i < item_no; i++)
180                 check_x = MAX(check_x, +strlen(items[i * 3 + 1]) + 4);
181
182         check_x = (list_width - check_x) / 2;
183         item_x = check_x + 4;
184
185         if (choice >= list_height) {
186                 scroll = choice - list_height + 1;
187                 choice -= scroll;
188         }
189
190         /* Print the list */
191         for (i = 0; i < max_choice; i++) {
192                 if (i != choice)
193                         print_item(list, items[(scroll + i) * 3 + 1],
194                                    status[i + scroll], i, 0);
195         }
196         print_item(list, items[(scroll + choice) * 3 + 1],
197                    status[choice + scroll], choice, 1);
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(dialog);
205         wnoutrefresh(list);
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                                         print_arrows(dialog, choice, item_no,
234                                                      scroll, box_y, box_x + check_x + 5, list_height);
235
236                                         wnoutrefresh(dialog);
237                                         wrefresh(list);
238
239                                         continue;       /* wait for another key press */
240                                 } else
241                                         i = choice - 1;
242                         } else if (key == KEY_DOWN || key == '+') {
243                                 if (choice == max_choice - 1) {
244                                         if (scroll + choice >= item_no - 1)
245                                                 continue;
246                                         /* Scroll list up */
247                                         if (list_height > 1) {
248                                                 /* De-highlight current last item before scrolling up */
249                                                 print_item(list, items[(scroll + max_choice - 1) * 3 + 1],
250                                                            status[scroll + max_choice - 1],
251                                                            max_choice - 1, FALSE);
252                                                 scrollok(list, TRUE);
253                                                 wscrl(list, 1);
254                                                 scrollok(list, FALSE);
255                                         }
256                                         scroll++;
257                                         print_item(list, items[(scroll + max_choice - 1) * 3 + 1],
258                                                    status[scroll + max_choice - 1], max_choice - 1, TRUE);
259
260                                         print_arrows(dialog, choice, item_no,
261                                                      scroll, box_y, box_x + check_x + 5, list_height);
262
263                                         wnoutrefresh(dialog);
264                                         wrefresh(list);
265
266                                         continue;       /* wait for another key press */
267                                 } else
268                                         i = choice + 1;
269                         }
270                         if (i != choice) {
271                                 /* De-highlight current item */
272                                 print_item(list, items[(scroll + choice) * 3 + 1],
273                                            status[scroll + choice], choice, FALSE);
274                                 /* Highlight new item */
275                                 choice = i;
276                                 print_item(list, items[(scroll + choice) * 3 + 1],
277                                            status[scroll + choice], choice, TRUE);
278                                 wnoutrefresh(dialog);
279                                 wrefresh(list);
280                         }
281                         continue;       /* wait for another key press */
282                 }
283                 switch (key) {
284                 case 'H':
285                 case 'h':
286                 case '?':
287                         fprintf(stderr, "%s", items[(scroll + choice) * 3]);
288                         delwin(dialog);
289                         free(status);
290                         return 1;
291                 case TAB:
292                 case KEY_LEFT:
293                 case KEY_RIGHT:
294                         button = ((key == KEY_LEFT ? --button : ++button) < 0)
295                             ? 1 : (button > 1 ? 0 : button);
296
297                         print_buttons(dialog, height, width, button);
298                         wrefresh(dialog);
299                         break;
300                 case 'S':
301                 case 's':
302                 case ' ':
303                 case '\n':
304                         if (!button) {
305                                 if (!status[scroll + choice]) {
306                                         for (i = 0; i < item_no; i++)
307                                                 status[i] = 0;
308                                         status[scroll + choice] = 1;
309                                         for (i = 0; i < max_choice; i++)
310                                                 print_item(list, items[(scroll + i) * 3 + 1],
311                                                            status[scroll + i], i, i == choice);
312                                 }
313                                 wnoutrefresh(dialog);
314                                 wrefresh(list);
315
316                                 for (i = 0; i < item_no; i++)
317                                         if (status[i])
318                                                 fprintf(stderr, "%s", items[i * 3]);
319                         } else
320                                 fprintf(stderr, "%s", items[(scroll + choice) * 3]);
321                         delwin(dialog);
322                         free(status);
323                         return button;
324                 case 'X':
325                 case 'x':
326                         key = ESC;
327                 case ESC:
328                         break;
329                 }
330
331                 /* Now, update everything... */
332                 doupdate();
333         }
334
335         delwin(dialog);
336         free(status);
337         return -1;              /* ESC pressed */
338 }