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(size: list_width + 1); |
22 | |
23 | strncpy(dest: list_item, src: item_str(), n: 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(tag: ':')) |
36 | wprintw(win, "(%c)" , item_is_tag(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(ptr: 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(win: dialog, label: "Select" , y, x, selected: selected == 0); |
94 | print_button(win: dialog, label: " Help " , y, x: x + 14, selected: 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(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(win: stdscr, y, x, height, width); |
134 | |
135 | dialog = newwin(height, width, y, x); |
136 | keypad(dialog, TRUE); |
137 | |
138 | draw_box(win: dialog, y: 0, x: 0, height, width, |
139 | box: dlg.dialog.atr, border: 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(win: dialog, prompt, width: width - 2, y: 1, x: 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(win: dialog, y: box_y, x: box_x, height: list_height + 2, width: list_width + 2, |
164 | box: dlg.menubox_border.atr, border: 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(n: scroll + i); |
183 | print_item(win: list, choice: i, selected: i == choice); |
184 | } |
185 | |
186 | print_arrows(win: dialog, choice, item_no: item_count(), scroll, |
187 | y: box_y, x: box_x + check_x + 5, height: list_height); |
188 | |
189 | print_buttons(dialog, height, width, selected: 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(n: 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(n: scroll); |
214 | print_item(win: list, choice: 0, FALSE); |
215 | scrollok(list, TRUE); |
216 | wscrl(list, -1); |
217 | scrollok(list, FALSE); |
218 | } |
219 | scroll--; |
220 | item_set(n: scroll); |
221 | print_item(win: list, choice: 0, TRUE); |
222 | print_arrows(win: dialog, choice, item_no: item_count(), |
223 | scroll, y: box_y, x: box_x + check_x + 5, height: 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(n: scroll + max_choice - 1); |
239 | print_item(win: list, |
240 | choice: max_choice - 1, |
241 | FALSE); |
242 | scrollok(list, TRUE); |
243 | wscrl(list, 1); |
244 | scrollok(list, FALSE); |
245 | } |
246 | scroll++; |
247 | item_set(n: scroll + max_choice - 1); |
248 | print_item(win: list, choice: max_choice - 1, TRUE); |
249 | |
250 | print_arrows(win: dialog, choice, item_no: item_count(), |
251 | scroll, y: box_y, x: box_x + check_x + 5, height: 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(n: scroll + choice); |
263 | print_item(win: list, choice, FALSE); |
264 | /* Highlight new item */ |
265 | choice = i; |
266 | item_set(n: scroll + choice); |
267 | print_item(win: 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(val: 0); |
285 | item_set(n: scroll + choice); |
286 | item_set_selected(val: 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, selected: 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(win: 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 | |