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,int selected)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
print_arrows(WINDOW * win,int choice,int item_no,int scroll,int y,int x,int height)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
print_buttons(WINDOW * dialog,int height,int width,int selected)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
dialog_checklist(const char * title,const char * prompt,int height,int width,int list_height,int item_no,const char * const * items,int flag)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