File: /usr/src/linux/scripts/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
32 print_item (WINDOW * win, const char *item, int status,
33 int choice, int selected)
34 {
35 int i;
36
37 /* Clear 'residue' of last item */
38 wattrset (win, menubox_attr);
39 wmove (win, choice, 0);
40 for (i = 0; i < list_width; i++)
41 waddch (win, ' ');
42
43 wmove (win, choice, check_x);
44 wattrset (win, selected ? check_selected_attr : check_attr);
45 if (checkflag == FLAG_CHECK)
46 wprintw (win, "[%c]", status ? 'X' : ' ');
47 else
48 wprintw (win, "(%c)", status ? 'X' : ' ');
49
50 wattrset (win, selected ? tag_selected_attr : tag_attr);
51 mvwaddch(win, choice, item_x, item[0]);
52 wattrset (win, selected ? item_selected_attr : item_attr);
53 waddstr (win, (char *)item+1);
54 if (selected) {
55 wmove (win, choice, check_x+1);
56 wrefresh (win);
57 }
58 }
59
60 /*
61 * Print the scroll indicators.
62 */
63 static void
64 print_arrows (WINDOW * win, int choice, int item_no, int scroll,
65 int y, int x, int height)
66 {
67 wmove(win, y, x);
68
69 if (scroll > 0) {
70 wattrset (win, uarrow_attr);
71 waddch (win, ACS_UARROW);
72 waddstr (win, "(-)");
73 }
74 else {
75 wattrset (win, menubox_attr);
76 waddch (win, ACS_HLINE);
77 waddch (win, ACS_HLINE);
78 waddch (win, ACS_HLINE);
79 waddch (win, ACS_HLINE);
80 }
81
82 y = y + height + 1;
83 wmove(win, y, x);
84
85 if ((height < item_no) && (scroll + choice < item_no - 1)) {
86 wattrset (win, darrow_attr);
87 waddch (win, ACS_DARROW);
88 waddstr (win, "(+)");
89 }
90 else {
91 wattrset (win, menubox_border_attr);
92 waddch (win, ACS_HLINE);
93 waddch (win, ACS_HLINE);
94 waddch (win, ACS_HLINE);
95 waddch (win, ACS_HLINE);
96 }
97 }
98
99 /*
100 * Display the termination buttons
101 */
102 static void
103 print_buttons( WINDOW *dialog, int height, int width, int selected)
104 {
105 int x = width / 2 - 11;
106 int y = height - 2;
107
108 print_button (dialog, "Select", y, x, selected == 0);
109 print_button (dialog, " Help ", y, x + 14, selected == 1);
110
111 wmove(dialog, y, x+1 + 14*selected);
112 wrefresh (dialog);
113 }
114
115 /*
116 * Display a dialog box with a list of options that can be turned on or off
117 * The `flag' parameter is used to select between radiolist and checklist.
118 */
119 int
120 dialog_checklist (const char *title, const char *prompt, int height, int width,
121 int list_height, int item_no, const char * const * items, int flag)
122
123 {
124 int i, x, y, box_x, box_y;
125 int key = 0, button = 0, choice = 0, scroll = 0, max_choice, *status;
126 WINDOW *dialog, *list;
127
128 checkflag = flag;
129
130 /* Allocate space for storing item on/off status */
131 if ((status = malloc (sizeof (int) * item_no)) == NULL) {
132 endwin ();
133 fprintf (stderr,
134 "\nCan't allocate memory in dialog_checklist().\n");
135 exit (-1);
136 }
137
138 /* Initializes status */
139 for (i = 0; i < item_no; i++) {
140 status[i] = !strcasecmp (items[i * 3 + 2], "on");
141 if (!choice && status[i])
142 choice = i;
143 }
144
145 max_choice = MIN (list_height, item_no);
146
147 /* center dialog box on screen */
148 x = (COLS - width) / 2;
149 y = (LINES - height) / 2;
150
151 draw_shadow (stdscr, y, x, height, width);
152
153 dialog = newwin (height, width, y, x);
154 keypad (dialog, TRUE);
155
156 draw_box (dialog, 0, 0, height, width, dialog_attr, border_attr);
157 wattrset (dialog, border_attr);
158 mvwaddch (dialog, height-3, 0, ACS_LTEE);
159 for (i = 0; i < width - 2; i++)
160 waddch (dialog, ACS_HLINE);
161 wattrset (dialog, dialog_attr);
162 waddch (dialog, ACS_RTEE);
163
164 if (title != NULL && strlen(title) >= width-2 ) {
165 /* truncate long title -- mec */
166 char * title2 = malloc(width-2+1);
167 memcpy( title2, title, width-2 );
168 title2[width-2] = '\0';
169 title = title2;
170 }
171
172 if (title != NULL) {
173 wattrset (dialog, title_attr);
174 mvwaddch (dialog, 0, (width - strlen(title))/2 - 1, ' ');
175 waddstr (dialog, (char *)title);
176 waddch (dialog, ' ');
177 }
178
179 wattrset (dialog, dialog_attr);
180 print_autowrap (dialog, prompt, width - 2, 1, 3);
181
182 list_width = width - 6;
183 box_y = height - list_height - 5;
184 box_x = (width - list_width) / 2 - 1;
185
186 /* create new window for the list */
187 list = subwin (dialog, list_height, list_width, y+box_y+1, x+box_x+1);
188
189 keypad (list, TRUE);
190
191 /* draw a box around the list items */
192 draw_box (dialog, box_y, box_x, list_height + 2, list_width + 2,
193 menubox_border_attr, menubox_attr);
194
195 /* Find length of longest item in order to center checklist */
196 check_x = 0;
197 for (i = 0; i < item_no; i++)
198 check_x = MAX (check_x, + strlen (items[i * 3 + 1]) + 4);
199
200 check_x = (list_width - check_x) / 2;
201 item_x = check_x + 4;
202
203 if (choice >= list_height) {
204 scroll = choice - list_height + 1;
205 choice -= scroll;
206 }
207
208 /* Print the list */
209 for (i = 0; i < max_choice; i++) {
210 print_item (list, items[(scroll+i) * 3 + 1],
211 status[i+scroll], i, i == choice);
212 }
213
214 print_arrows(dialog, choice, item_no, scroll,
215 box_y, box_x + check_x + 5, list_height);
216
217 print_buttons(dialog, height, width, 0);
218
219 wnoutrefresh (list);
220 wnoutrefresh (dialog);
221 doupdate ();
222
223 while (key != ESC) {
224 key = wgetch (dialog);
225
226 for (i = 0; i < max_choice; i++)
227 if (toupper(key) == toupper(items[(scroll+i)*3+1][0]))
228 break;
229
230
231 if ( i < max_choice || key == KEY_UP || key == KEY_DOWN ||
232 key == '+' || key == '-' ) {
233 if (key == KEY_UP || key == '-') {
234 if (!choice) {
235 if (!scroll)
236 continue;
237 /* Scroll list down */
238 if (list_height > 1) {
239 /* De-highlight current first item */
240 print_item (list, items[scroll * 3 + 1],
241 status[scroll], 0, FALSE);
242 scrollok (list, TRUE);
243 wscrl (list, -1);
244 scrollok (list, FALSE);
245 }
246 scroll--;
247 print_item (list, items[scroll * 3 + 1],
248 status[scroll], 0, TRUE);
249 wnoutrefresh (list);
250
251 print_arrows(dialog, choice, item_no, scroll,
252 box_y, box_x + check_x + 5, list_height);
253
254 wrefresh (dialog);
255
256 continue; /* wait for another key press */
257 } else
258 i = choice - 1;
259 } else if (key == KEY_DOWN || key == '+') {
260 if (choice == max_choice - 1) {
261 if (scroll + choice >= item_no - 1)
262 continue;
263 /* Scroll list up */
264 if (list_height > 1) {
265 /* De-highlight current last item before scrolling up */
266 print_item (list, items[(scroll + max_choice - 1) * 3 + 1],
267 status[scroll + max_choice - 1],
268 max_choice - 1, FALSE);
269 scrollok (list, TRUE);
270 scroll (list);
271 scrollok (list, FALSE);
272 }
273 scroll++;
274 print_item (list, items[(scroll + max_choice - 1) * 3 + 1],
275 status[scroll + max_choice - 1],
276 max_choice - 1, TRUE);
277 wnoutrefresh (list);
278
279 print_arrows(dialog, choice, item_no, scroll,
280 box_y, box_x + check_x + 5, list_height);
281
282 wrefresh (dialog);
283
284 continue; /* wait for another key press */
285 } else
286 i = choice + 1;
287 }
288 if (i != choice) {
289 /* De-highlight current item */
290 print_item (list, items[(scroll + choice) * 3 + 1],
291 status[scroll + choice], choice, FALSE);
292 /* Highlight new item */
293 choice = i;
294 print_item (list, items[(scroll + choice) * 3 + 1],
295 status[scroll + choice], choice, TRUE);
296 wnoutrefresh (list);
297 wrefresh (dialog);
298 }
299 continue; /* wait for another key press */
300 }
301 switch (key) {
302 case 'H':
303 case 'h':
304 case '?':
305 delwin (dialog);
306 free (status);
307 return 1;
308 case TAB:
309 case KEY_LEFT:
310 case KEY_RIGHT:
311 button = ((key == KEY_LEFT ? --button : ++button) < 0)
312 ? 1 : (button > 1 ? 0 : button);
313
314 print_buttons(dialog, height, width, button);
315 wrefresh (dialog);
316 break;
317 case 'S':
318 case 's':
319 case ' ':
320 case '\n':
321 if (!button) {
322 if (flag == FLAG_CHECK) {
323 status[scroll + choice] = !status[scroll + choice];
324 wmove (list, choice, check_x);
325 wattrset (list, check_selected_attr);
326 wprintw (list, "[%c]", status[scroll + choice] ? 'X' : ' ');
327 } else {
328 if (!status[scroll + choice]) {
329 for (i = 0; i < item_no; i++)
330 status[i] = 0;
331 status[scroll + choice] = 1;
332 for (i = 0; i < max_choice; i++)
333 print_item (list, items[(scroll + i) * 3 + 1],
334 status[scroll + i], i, i == choice);
335 }
336 }
337 wnoutrefresh (list);
338 wrefresh (dialog);
339
340 for (i = 0; i < item_no; i++) {
341 if (status[i]) {
342 if (flag == FLAG_CHECK) {
343 fprintf (stderr, "\"%s\" ", items[i * 3]);
344 } else {
345 fprintf (stderr, "%s", items[i * 3]);
346 }
347
348 }
349 }
350 }
351 delwin (dialog);
352 free (status);
353 return button;
354 case 'X':
355 case 'x':
356 key = ESC;
357 case ESC:
358 break;
359 }
360
361 /* Now, update everything... */
362 doupdate ();
363 }
364
365
366 delwin (dialog);
367 free (status);
368 return -1; /* ESC pressed */
369 }
370