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 */
print_item(WINDOW * win,int choice,int selected)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 */
print_arrows(WINDOW * win,int choice,int item_no,int scroll,int y,int x,int height)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 */
print_buttons(WINDOW * dialog,int height,int width,int selected)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 */
dialog_checklist(const char * title,const char * prompt,int height,int width,int list_height)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_HEIGTH_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 wnoutrefresh(dialog);
192 wnoutrefresh(list);
193 doupdate();
194
195 while (key != KEY_ESC) {
196 key = wgetch(dialog);
197
198 for (i = 0; i < max_choice; i++) {
199 item_set(i + scroll);
200 if (toupper(key) == toupper(item_str()[0]))
201 break;
202 }
203
204 if (i < max_choice || key == KEY_UP || key == KEY_DOWN ||
205 key == '+' || key == '-') {
206 if (key == KEY_UP || key == '-') {
207 if (!choice) {
208 if (!scroll)
209 continue;
210 /* Scroll list down */
211 if (list_height > 1) {
212 /* De-highlight current first item */
213 item_set(scroll);
214 print_item(list, 0, FALSE);
215 scrollok(list, TRUE);
216 wscrl(list, -1);
217 scrollok(list, FALSE);
218 }
219 scroll--;
220 item_set(scroll);
221 print_item(list, 0, TRUE);
222 print_arrows(dialog, choice, item_count(),
223 scroll, box_y, box_x + check_x + 5, list_height);
224
225 wnoutrefresh(dialog);
226 wrefresh(list);
227
228 continue; /* wait for another key press */
229 } else
230 i = choice - 1;
231 } else if (key == KEY_DOWN || key == '+') {
232 if (choice == max_choice - 1) {
233 if (scroll + choice >= item_count() - 1)
234 continue;
235 /* Scroll list up */
236 if (list_height > 1) {
237 /* De-highlight current last item before scrolling up */
238 item_set(scroll + max_choice - 1);
239 print_item(list,
240 max_choice - 1,
241 FALSE);
242 scrollok(list, TRUE);
243 wscrl(list, 1);
244 scrollok(list, FALSE);
245 }
246 scroll++;
247 item_set(scroll + max_choice - 1);
248 print_item(list, max_choice - 1, TRUE);
249
250 print_arrows(dialog, choice, item_count(),
251 scroll, box_y, box_x + check_x + 5, list_height);
252
253 wnoutrefresh(dialog);
254 wrefresh(list);
255
256 continue; /* wait for another key press */
257 } else
258 i = choice + 1;
259 }
260 if (i != choice) {
261 /* De-highlight current item */
262 item_set(scroll + choice);
263 print_item(list, choice, FALSE);
264 /* Highlight new item */
265 choice = i;
266 item_set(scroll + choice);
267 print_item(list, choice, TRUE);
268 wnoutrefresh(dialog);
269 wrefresh(list);
270 }
271 continue; /* wait for another key press */
272 }
273 switch (key) {
274 case 'H':
275 case 'h':
276 case '?':
277 button = 1;
278 /* fall-through */
279 case 'S':
280 case 's':
281 case ' ':
282 case '\n':
283 item_foreach()
284 item_set_selected(0);
285 item_set(scroll + choice);
286 item_set_selected(1);
287 delwin(list);
288 delwin(dialog);
289 return button;
290 case TAB:
291 case KEY_LEFT:
292 case KEY_RIGHT:
293 button = ((key == KEY_LEFT ? --button : ++button) < 0)
294 ? 1 : (button > 1 ? 0 : button);
295
296 print_buttons(dialog, height, width, button);
297 wrefresh(dialog);
298 break;
299 case 'X':
300 case 'x':
301 key = KEY_ESC;
302 break;
303 case KEY_ESC:
304 key = on_key_esc(dialog);
305 break;
306 case KEY_RESIZE:
307 delwin(list);
308 delwin(dialog);
309 on_key_resize();
310 goto do_resize;
311 }
312
313 /* Now, update everything... */
314 doupdate();
315 }
316 delwin(list);
317 delwin(dialog);
318 return key; /* ESC pressed */
319 }
320