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 */
print_item(WINDOW * win,const char * item,int status,int choice,int selected)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 wprintw(win, "(%c)", status ? 'X' : ' ');
45
46 wattrset(win, selected ? tag_selected_attr : tag_attr);
47 mvwaddch(win, choice, item_x, item[0]);
48 wattrset(win, selected ? item_selected_attr : item_attr);
49 waddstr(win, (char *)item + 1);
50 if (selected) {
51 wmove(win, choice, check_x + 1);
52 wrefresh(win);
53 }
54 }
55
56 /*
57 * Print the scroll indicators.
58 */
print_arrows(WINDOW * win,int choice,int item_no,int scroll,int y,int x,int height)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, uarrow_attr);
66 waddch(win, ACS_UARROW);
67 waddstr(win, "(-)");
68 } else {
69 wattrset(win, menubox_attr);
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, darrow_attr);
81 waddch(win, ACS_DARROW);
82 waddstr(win, "(+)");
83 } else {
84 wattrset(win, menubox_border_attr);
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 */
print_buttons(WINDOW * dialog,int height,int width,int selected)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 */
dialog_checklist(const char * title,const char * prompt,int height,int width,int list_height,int item_no,const char * const * items)111 int dialog_checklist(const char *title, const char *prompt, int height,
112 int width, int list_height, int item_no,
113 const char *const *items)
114 {
115 int i, x, y, box_x, box_y;
116 int key = 0, button = 0, choice = 0, scroll = 0, max_choice, *status;
117 WINDOW *dialog, *list;
118
119 /* Allocate space for storing item on/off status */
120 if ((status = malloc(sizeof(int) * item_no)) == NULL) {
121 endwin();
122 fprintf(stderr,
123 "\nCan't allocate memory in dialog_checklist().\n");
124 exit(-1);
125 }
126
127 /* Initializes status */
128 for (i = 0; i < item_no; i++) {
129 status[i] = !strcasecmp(items[i * 3 + 2], "on");
130 if ((!choice && status[i])
131 || !strcasecmp(items[i * 3 + 2], "selected"))
132 choice = i + 1;
133 }
134 if (choice)
135 choice--;
136
137 max_choice = MIN(list_height, item_no);
138
139 /* center dialog box on screen */
140 x = (COLS - width) / 2;
141 y = (LINES - height) / 2;
142
143 draw_shadow(stdscr, y, x, height, width);
144
145 dialog = newwin(height, width, y, x);
146 keypad(dialog, TRUE);
147
148 draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
149 wattrset(dialog, border_attr);
150 mvwaddch(dialog, height - 3, 0, ACS_LTEE);
151 for (i = 0; i < width - 2; i++)
152 waddch(dialog, ACS_HLINE);
153 wattrset(dialog, dialog_attr);
154 waddch(dialog, ACS_RTEE);
155
156 print_title(dialog, title, width);
157
158 wattrset(dialog, dialog_attr);
159 print_autowrap(dialog, prompt, width - 2, 1, 3);
160
161 list_width = width - 6;
162 box_y = height - list_height - 5;
163 box_x = (width - list_width) / 2 - 1;
164
165 /* create new window for the list */
166 list = subwin(dialog, list_height, list_width, y + box_y + 1,
167 x + box_x + 1);
168
169 keypad(list, TRUE);
170
171 /* draw a box around the list items */
172 draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
173 menubox_border_attr, menubox_attr);
174
175 /* Find length of longest item in order to center checklist */
176 check_x = 0;
177 for (i = 0; i < item_no; i++)
178 check_x = MAX(check_x, +strlen(items[i * 3 + 1]) + 4);
179
180 check_x = (list_width - check_x) / 2;
181 item_x = check_x + 4;
182
183 if (choice >= list_height) {
184 scroll = choice - list_height + 1;
185 choice -= scroll;
186 }
187
188 /* Print the list */
189 for (i = 0; i < max_choice; i++) {
190 print_item(list, items[(scroll + i) * 3 + 1],
191 status[i + scroll], i, i == choice);
192 }
193
194 print_arrows(dialog, choice, item_no, scroll,
195 box_y, box_x + check_x + 5, list_height);
196
197 print_buttons(dialog, height, width, 0);
198
199 wnoutrefresh(dialog);
200 wnoutrefresh(list);
201 doupdate();
202
203 while (key != ESC) {
204 key = wgetch(dialog);
205
206 for (i = 0; i < max_choice; i++)
207 if (toupper(key) ==
208 toupper(items[(scroll + i) * 3 + 1][0]))
209 break;
210
211 if (i < max_choice || key == KEY_UP || key == KEY_DOWN ||
212 key == '+' || key == '-') {
213 if (key == KEY_UP || key == '-') {
214 if (!choice) {
215 if (!scroll)
216 continue;
217 /* Scroll list down */
218 if (list_height > 1) {
219 /* De-highlight current first item */
220 print_item(list, items[scroll * 3 + 1],
221 status[scroll], 0, FALSE);
222 scrollok(list, TRUE);
223 wscrl(list, -1);
224 scrollok(list, FALSE);
225 }
226 scroll--;
227 print_item(list, items[scroll * 3 + 1], status[scroll], 0, TRUE);
228 print_arrows(dialog, choice, item_no,
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_no - 1)
240 continue;
241 /* Scroll list up */
242 if (list_height > 1) {
243 /* De-highlight current last item before scrolling up */
244 print_item(list, items[(scroll + max_choice - 1) * 3 + 1],
245 status[scroll + max_choice - 1],
246 max_choice - 1, FALSE);
247 scrollok(list, TRUE);
248 wscrl(list, 1);
249 scrollok(list, FALSE);
250 }
251 scroll++;
252 print_item(list, items[(scroll + max_choice - 1) * 3 + 1],
253 status[scroll + max_choice - 1], max_choice - 1, TRUE);
254
255 print_arrows(dialog, choice, item_no,
256 scroll, box_y, box_x + check_x + 5, list_height);
257
258 wnoutrefresh(dialog);
259 wrefresh(list);
260
261 continue; /* wait for another key press */
262 } else
263 i = choice + 1;
264 }
265 if (i != choice) {
266 /* De-highlight current item */
267 print_item(list, items[(scroll + choice) * 3 + 1],
268 status[scroll + choice], choice, FALSE);
269 /* Highlight new item */
270 choice = i;
271 print_item(list, items[(scroll + choice) * 3 + 1],
272 status[scroll + choice], choice, TRUE);
273 wnoutrefresh(dialog);
274 wrefresh(list);
275 }
276 continue; /* wait for another key press */
277 }
278 switch (key) {
279 case 'H':
280 case 'h':
281 case '?':
282 fprintf(stderr, "%s", items[(scroll + choice) * 3]);
283 delwin(dialog);
284 free(status);
285 return 1;
286 case TAB:
287 case KEY_LEFT:
288 case KEY_RIGHT:
289 button = ((key == KEY_LEFT ? --button : ++button) < 0)
290 ? 1 : (button > 1 ? 0 : button);
291
292 print_buttons(dialog, height, width, button);
293 wrefresh(dialog);
294 break;
295 case 'S':
296 case 's':
297 case ' ':
298 case '\n':
299 if (!button) {
300 if (!status[scroll + choice]) {
301 for (i = 0; i < item_no; i++)
302 status[i] = 0;
303 status[scroll + choice] = 1;
304 for (i = 0; i < max_choice; i++)
305 print_item(list, items[(scroll + i) * 3 + 1],
306 status[scroll + i], i, i == choice);
307 }
308 wnoutrefresh(dialog);
309 wrefresh(list);
310
311 for (i = 0; i < item_no; i++)
312 if (status[i])
313 fprintf(stderr, "%s", items[i * 3]);
314 } else
315 fprintf(stderr, "%s", items[(scroll + choice) * 3]);
316 delwin(dialog);
317 free(status);
318 return button;
319 case 'X':
320 case 'x':
321 key = ESC;
322 case ESC:
323 break;
324 }
325
326 /* Now, update everything... */
327 doupdate();
328 }
329
330 delwin(dialog);
331 free(status);
332 return -1; /* ESC pressed */
333 }
334