1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * checklist.c -- implements the checklist box
4 *
5 * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
6 * Stuart Herbert - S.Herbert@sheffield.ac.uk: radiolist extension
7 * Alessandro Rubini - rubini@ipvvis.unipv.it: merged the two
8 * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
9 */
10
11 #include "dialog.h"
12
13 static int list_width, check_x, item_x;
14
15 /*
16 * Print list item
17 */
18 static void print_item(WINDOW * win, int choice, int selected)
19 {
20 int i;
21 char *list_item = malloc(list_width + 1);
22
23 strncpy(list_item, item_str(), list_width - item_x);
24 list_item[list_width - item_x] = '\0';
25
26 /* Clear 'residue' of last item */
27 wattrset(win, dlg.menubox.atr);
28 wmove(win, choice, 0);
29 for (i = 0; i < list_width; i++)
30 waddch(win, ' ');
31
32 wmove(win, choice, check_x);
33 wattrset(win, selected ? dlg.check_selected.atr
34 : dlg.check.atr);
35 if (!item_is_tag(':'))
36 wprintw(win, "(%c)", item_is_tag('X') ? 'X' : ' ');
37
38 wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr);
39 mvwaddch(win, choice, item_x, list_item[0]);
40 wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
41 waddstr(win, list_item + 1);
42 if (selected) {
43 wmove(win, choice, check_x + 1);
44 wrefresh(win);
45 }
46 free(list_item);
47 }
48
49 /*
50 * Print the scroll indicators.
51 */
52 static void print_arrows(WINDOW * win, int choice, int item_no, int scroll,
53 int y, int x, int height)
54 {
55 wmove(win, y, x);
56
57 if (scroll > 0) {
58 wattrset(win, dlg.uarrow.atr);
59 waddch(win, ACS_UARROW);
60 waddstr(win, "(-)");
61 } else {
62 wattrset(win, dlg.menubox.atr);
63 waddch(win, ACS_HLINE);
64 waddch(win, ACS_HLINE);
65 waddch(win, ACS_HLINE);
66 waddch(win, ACS_HLINE);
67 }
68
69 y = y + height + 1;
70 wmove(win, y, x);
71
72 if ((height < item_no) && (scroll + choice < item_no - 1)) {
73 wattrset(win, dlg.darrow.atr);
74 waddch(win, ACS_DARROW);
75 waddstr(win, "(+)");
76 } else {
77 wattrset(win, dlg.menubox_border.atr);
78 waddch(win, ACS_HLINE);
79 waddch(win, ACS_HLINE);
80 waddch(win, ACS_HLINE);
81 waddch(win, ACS_HLINE);
82 }
83 }
84
85 /*
86 * Display the termination buttons
87 */
88 static void print_buttons(WINDOW * dialog, int height, int width, int selected)
89 {
90 int x = width / 2 - 11;
91 int y = height - 2;
92
93 print_button(dialog, "Select", y, x, selected == 0);
94 print_button(dialog, " Help ", y, x + 14, selected == 1);
95
96 wmove(dialog, y, x + 1 + 14 * selected);
97 wrefresh(dialog);
98 }
99
100 /*
101 * Display a dialog box with a list of options that can be turned on or off
102 * in the style of radiolist (only one option turned on at a time).
103 */
104 int dialog_checklist(const char *title, const char *prompt, int height,
105 int width, int list_height)
106 {
107 int i, x, y, box_x, box_y;
108 int key = 0, button = 0, choice = 0, scroll = 0, max_choice;
109 WINDOW *dialog, *list;
110
111 /* which item to highlight */
112 item_foreach() {
113 if (item_is_tag('X'))
114 choice = item_n();
115 if (item_is_selected()) {
116 choice = item_n();
117 break;
118 }
119 }
120
121 do_resize:
122 if (getmaxy(stdscr) < (height + CHECKLIST_HEIGHT_MIN))
123 return -ERRDISPLAYTOOSMALL;
124 if (getmaxx(stdscr) < (width + CHECKLIST_WIDTH_MIN))
125 return -ERRDISPLAYTOOSMALL;
126
127 max_choice = MIN(list_height, item_count());
128
129 /* center dialog box on screen */
130 x = (getmaxx(stdscr) - width) / 2;
131 y = (getmaxy(stdscr) - height) / 2;
132
133 draw_shadow(stdscr, y, x, height, width);
134
135 dialog = newwin(height, width, y, x);
136 keypad(dialog, TRUE);
137
138 draw_box(dialog, 0, 0, height, width,
139 dlg.dialog.atr, dlg.border.atr);
140 wattrset(dialog, dlg.border.atr);
141 mvwaddch(dialog, height - 3, 0, ACS_LTEE);
142 for (i = 0; i < width - 2; i++)
143 waddch(dialog, ACS_HLINE);
144 wattrset(dialog, dlg.dialog.atr);
145 waddch(dialog, ACS_RTEE);
146
147 print_title(dialog, title, width);
148
149 wattrset(dialog, dlg.dialog.atr);
150 print_autowrap(dialog, prompt, width - 2, 1, 3);
151
152 list_width = width - 6;
153 box_y = height - list_height - 5;
154 box_x = (width - list_width) / 2 - 1;
155
156 /* create new window for the list */
157 list = subwin(dialog, list_height, list_width, y + box_y + 1,
158 x + box_x + 1);
159
160 keypad(list, TRUE);
161
162 /* draw a box around the list items */
163 draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
164 dlg.menubox_border.atr, dlg.menubox.atr);
165
166 /* Find length of longest item in order to center checklist */
167 check_x = 0;
168 item_foreach()
169 check_x = MAX(check_x, strlen(item_str()) + 4);
170 check_x = MIN(check_x, list_width);
171
172 check_x = (list_width - check_x) / 2;
173 item_x = check_x + 4;
174
175 if (choice >= list_height) {
176 scroll = choice - list_height + 1;
177 choice -= scroll;
178 }
179
180 /* Print the list */
181 for (i = 0; i < max_choice; i++) {
182 item_set(scroll + i);
183 print_item(list, i, i == choice);
184 }
185
186 print_arrows(dialog, choice, item_count(), scroll,
187 box_y, box_x + check_x + 5, list_height);
188
189 print_buttons(dialog, height, width, 0);
190
191 wmove(list, choice, check_x + 1);
192 wrefresh(list);
193
194 while (key != KEY_ESC) {
195 key = wgetch(dialog);
196
197 for (i = 0; i < max_choice; i++) {
198 item_set(i + scroll);
199 if (toupper(key) == toupper(item_str()[0]))
200 break;
201 }
202
203 if (i < max_choice || key == KEY_UP || key == KEY_DOWN ||
204 key == '+' || key == '-') {
205 if (key == KEY_UP || key == '-') {
206 if (!choice) {
207 if (!scroll)
208 continue;
209 /* Scroll list down */
210 if (list_height > 1) {
211 /* De-highlight current first item */
212 item_set(scroll);
213 print_item(list, 0, FALSE);
214 scrollok(list, TRUE);
215 wscrl(list, -1);
216 scrollok(list, FALSE);
217 }
218 scroll--;
219 item_set(scroll);
220 print_item(list, 0, TRUE);
221 print_arrows(dialog, choice, item_count(),
222 scroll, box_y, box_x + check_x + 5, list_height);
223
224 wnoutrefresh(dialog);
225 wrefresh(list);
226
227 continue; /* wait for another key press */
228 } else
229 i = choice - 1;
230 } else if (key == KEY_DOWN || key == '+') {
231 if (choice == max_choice - 1) {
232 if (scroll + choice >= item_count() - 1)
233 continue;
234 /* Scroll list up */
235 if (list_height > 1) {
236 /* De-highlight current last item before scrolling up */
237 item_set(scroll + max_choice - 1);
238 print_item(list,
239 max_choice - 1,
240 FALSE);
241 scrollok(list, TRUE);
242 wscrl(list, 1);
243 scrollok(list, FALSE);
244 }
245 scroll++;
246 item_set(scroll + max_choice - 1);
247 print_item(list, max_choice - 1, TRUE);
248
249 print_arrows(dialog, choice, item_count(),
250 scroll, box_y, box_x + check_x + 5, list_height);
251
252 wnoutrefresh(dialog);
253 wrefresh(list);
254
255 continue; /* wait for another key press */
256 } else
257 i = choice + 1;
258 }
259 if (i != choice) {
260 /* De-highlight current item */
261 item_set(scroll + choice);
262 print_item(list, choice, FALSE);
263 /* Highlight new item */
264 choice = i;
265 item_set(scroll + choice);
266 print_item(list, choice, TRUE);
267 wnoutrefresh(dialog);
268 wrefresh(list);
269 }
270 continue; /* wait for another key press */
271 }
272 switch (key) {
273 case 'H':
274 case 'h':
275 case '?':
276 button = 1;
277 /* fall-through */
278 case 'S':
279 case 's':
280 case ' ':
281 case '\n':
282 item_foreach()
283 item_set_selected(0);
284 item_set(scroll + choice);
285 item_set_selected(1);
286 delwin(list);
287 delwin(dialog);
288 return button;
289 case TAB:
290 case KEY_LEFT:
291 case KEY_RIGHT:
292 button = ((key == KEY_LEFT ? --button : ++button) < 0)
293 ? 1 : (button > 1 ? 0 : button);
294
295 print_buttons(dialog, height, width, button);
296 wrefresh(dialog);
297 break;
298 case 'X':
299 case 'x':
300 key = KEY_ESC;
301 break;
302 case KEY_ESC:
303 key = on_key_esc(dialog);
304 break;
305 case KEY_RESIZE:
306 delwin(list);
307 delwin(dialog);
308 on_key_resize();
309 goto do_resize;
310 }
311
312 /* Now, update everything... */
313 doupdate();
314 }
315 delwin(list);
316 delwin(dialog);
317 return key; /* ESC pressed */
318 }
319
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