1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * util.c
4 *
5 * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
6 * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
7 */
8
9 #include <stdarg.h>
10
11 #include "dialog.h"
12
13 /* Needed in signal handler in mconf.c */
14 int saved_x, saved_y;
15
16 struct dialog_info dlg;
17
set_mono_theme(void)18 static void set_mono_theme(void)
19 {
20 dlg.title.atr = A_BOLD;
21 dlg.button_active.atr = A_REVERSE;
22 dlg.button_inactive.atr = A_DIM;
23 dlg.button_key_active.atr = A_REVERSE;
24 dlg.button_key_inactive.atr = A_BOLD;
25 dlg.button_label_active.atr = A_REVERSE;
26 dlg.position_indicator.atr = A_BOLD;
27 dlg.item_selected.atr = A_REVERSE;
28 dlg.tag.atr = A_BOLD;
29 dlg.tag_selected.atr = A_REVERSE;
30 dlg.tag_key.atr = A_BOLD;
31 dlg.tag_key_selected.atr = A_REVERSE;
32 dlg.check.atr = A_BOLD;
33 dlg.check_selected.atr = A_REVERSE;
34 dlg.uarrow.atr = A_BOLD;
35 dlg.darrow.atr = A_BOLD;
36 }
37
38 #define DLG_COLOR(dialog, f, b, h) \
39 do { \
40 dlg.dialog.fg = (f); \
41 dlg.dialog.bg = (b); \
42 dlg.dialog.hl = (h); \
43 } while (0)
44
set_classic_theme(void)45 static void set_classic_theme(void)
46 {
47 DLG_COLOR(screen, COLOR_CYAN, COLOR_BLUE, true);
48 DLG_COLOR(shadow, COLOR_BLACK, COLOR_BLACK, true);
49 DLG_COLOR(dialog, COLOR_BLACK, COLOR_WHITE, false);
50 DLG_COLOR(title, COLOR_YELLOW, COLOR_WHITE, true);
51 DLG_COLOR(border, COLOR_WHITE, COLOR_WHITE, true);
52 DLG_COLOR(button_active, COLOR_WHITE, COLOR_BLUE, true);
53 DLG_COLOR(button_inactive, COLOR_BLACK, COLOR_WHITE, false);
54 DLG_COLOR(button_key_active, COLOR_WHITE, COLOR_BLUE, true);
55 DLG_COLOR(button_key_inactive, COLOR_RED, COLOR_WHITE, false);
56 DLG_COLOR(button_label_active, COLOR_YELLOW, COLOR_BLUE, true);
57 DLG_COLOR(button_label_inactive, COLOR_BLACK, COLOR_WHITE, true);
58 DLG_COLOR(inputbox, COLOR_BLACK, COLOR_WHITE, false);
59 DLG_COLOR(position_indicator, COLOR_YELLOW, COLOR_WHITE, true);
60 DLG_COLOR(menubox, COLOR_BLACK, COLOR_WHITE, false);
61 DLG_COLOR(menubox_border, COLOR_WHITE, COLOR_WHITE, true);
62 DLG_COLOR(item, COLOR_BLACK, COLOR_WHITE, false);
63 DLG_COLOR(item_selected, COLOR_WHITE, COLOR_BLUE, true);
64 DLG_COLOR(tag, COLOR_YELLOW, COLOR_WHITE, true);
65 DLG_COLOR(tag_selected, COLOR_YELLOW, COLOR_BLUE, true);
66 DLG_COLOR(tag_key, COLOR_YELLOW, COLOR_WHITE, true);
67 DLG_COLOR(tag_key_selected, COLOR_YELLOW, COLOR_BLUE, true);
68 DLG_COLOR(check, COLOR_BLACK, COLOR_WHITE, false);
69 DLG_COLOR(check_selected, COLOR_WHITE, COLOR_BLUE, true);
70 DLG_COLOR(uarrow, COLOR_GREEN, COLOR_WHITE, true);
71 DLG_COLOR(darrow, COLOR_GREEN, COLOR_WHITE, true);
72 }
73
set_blackbg_theme(void)74 static void set_blackbg_theme(void)
75 {
76 DLG_COLOR(screen, COLOR_RED, COLOR_BLACK, true);
77 DLG_COLOR(shadow, COLOR_BLACK, COLOR_BLACK, false);
78 DLG_COLOR(dialog, COLOR_WHITE, COLOR_BLACK, false);
79 DLG_COLOR(title, COLOR_RED, COLOR_BLACK, false);
80 DLG_COLOR(border, COLOR_BLACK, COLOR_BLACK, true);
81
82 DLG_COLOR(button_active, COLOR_YELLOW, COLOR_RED, false);
83 DLG_COLOR(button_inactive, COLOR_YELLOW, COLOR_BLACK, false);
84 DLG_COLOR(button_key_active, COLOR_YELLOW, COLOR_RED, true);
85 DLG_COLOR(button_key_inactive, COLOR_RED, COLOR_BLACK, false);
86 DLG_COLOR(button_label_active, COLOR_WHITE, COLOR_RED, false);
87 DLG_COLOR(button_label_inactive, COLOR_WHITE, COLOR_BLACK, false);
88
89 DLG_COLOR(inputbox, COLOR_YELLOW, COLOR_BLACK, false);
90
91 DLG_COLOR(position_indicator, COLOR_RED, COLOR_BLACK, false);
92
93 DLG_COLOR(menubox, COLOR_YELLOW, COLOR_BLACK, false);
94 DLG_COLOR(menubox_border, COLOR_BLACK, COLOR_BLACK, true);
95
96 DLG_COLOR(item, COLOR_WHITE, COLOR_BLACK, false);
97 DLG_COLOR(item_selected, COLOR_WHITE, COLOR_RED, false);
98
99 DLG_COLOR(tag, COLOR_RED, COLOR_BLACK, false);
100 DLG_COLOR(tag_selected, COLOR_YELLOW, COLOR_RED, true);
101 DLG_COLOR(tag_key, COLOR_RED, COLOR_BLACK, false);
102 DLG_COLOR(tag_key_selected, COLOR_YELLOW, COLOR_RED, true);
103
104 DLG_COLOR(check, COLOR_YELLOW, COLOR_BLACK, false);
105 DLG_COLOR(check_selected, COLOR_YELLOW, COLOR_RED, true);
106
107 DLG_COLOR(uarrow, COLOR_RED, COLOR_BLACK, false);
108 DLG_COLOR(darrow, COLOR_RED, COLOR_BLACK, false);
109 }
110
set_bluetitle_theme(void)111 static void set_bluetitle_theme(void)
112 {
113 set_classic_theme();
114 DLG_COLOR(title, COLOR_BLUE, COLOR_WHITE, true);
115 DLG_COLOR(button_key_active, COLOR_YELLOW, COLOR_BLUE, true);
116 DLG_COLOR(button_label_active, COLOR_WHITE, COLOR_BLUE, true);
117 DLG_COLOR(position_indicator, COLOR_BLUE, COLOR_WHITE, true);
118 DLG_COLOR(tag, COLOR_BLUE, COLOR_WHITE, true);
119 DLG_COLOR(tag_key, COLOR_BLUE, COLOR_WHITE, true);
120
121 }
122
123 /*
124 * Select color theme
125 */
set_theme(const char * theme)126 static int set_theme(const char *theme)
127 {
128 int use_color = 1;
129 if (!theme)
130 set_bluetitle_theme();
131 else if (strcmp(theme, "classic") == 0)
132 set_classic_theme();
133 else if (strcmp(theme, "bluetitle") == 0)
134 set_bluetitle_theme();
135 else if (strcmp(theme, "blackbg") == 0)
136 set_blackbg_theme();
137 else if (strcmp(theme, "mono") == 0)
138 use_color = 0;
139
140 return use_color;
141 }
142
init_one_color(struct dialog_color * color)143 static void init_one_color(struct dialog_color *color)
144 {
145 static int pair = 0;
146
147 pair++;
148 init_pair(pair, color->fg, color->bg);
149 if (color->hl)
150 color->atr = A_BOLD | COLOR_PAIR(pair);
151 else
152 color->atr = COLOR_PAIR(pair);
153 }
154
init_dialog_colors(void)155 static void init_dialog_colors(void)
156 {
157 init_one_color(&dlg.screen);
158 init_one_color(&dlg.shadow);
159 init_one_color(&dlg.dialog);
160 init_one_color(&dlg.title);
161 init_one_color(&dlg.border);
162 init_one_color(&dlg.button_active);
163 init_one_color(&dlg.button_inactive);
164 init_one_color(&dlg.button_key_active);
165 init_one_color(&dlg.button_key_inactive);
166 init_one_color(&dlg.button_label_active);
167 init_one_color(&dlg.button_label_inactive);
168 init_one_color(&dlg.inputbox);
169 init_one_color(&dlg.position_indicator);
170 init_one_color(&dlg.menubox);
171 init_one_color(&dlg.menubox_border);
172 init_one_color(&dlg.item);
173 init_one_color(&dlg.item_selected);
174 init_one_color(&dlg.tag);
175 init_one_color(&dlg.tag_selected);
176 init_one_color(&dlg.tag_key);
177 init_one_color(&dlg.tag_key_selected);
178 init_one_color(&dlg.check);
179 init_one_color(&dlg.check_selected);
180 init_one_color(&dlg.uarrow);
181 init_one_color(&dlg.darrow);
182 }
183
184 /*
185 * Setup for color display
186 */
color_setup(const char * theme)187 static void color_setup(const char *theme)
188 {
189 int use_color;
190
191 use_color = set_theme(theme);
192 if (use_color && has_colors()) {
193 start_color();
194 init_dialog_colors();
195 } else
196 set_mono_theme();
197 }
198
199 /*
200 * Set window to attribute 'attr'
201 */
attr_clear(WINDOW * win,int height,int width,chtype attr)202 void attr_clear(WINDOW * win, int height, int width, chtype attr)
203 {
204 int i, j;
205
206 wattrset(win, attr);
207 for (i = 0; i < height; i++) {
208 wmove(win, i, 0);
209 for (j = 0; j < width; j++)
210 waddch(win, ' ');
211 }
212 touchwin(win);
213 }
214
dialog_clear(void)215 void dialog_clear(void)
216 {
217 int lines, columns;
218
219 lines = getmaxy(stdscr);
220 columns = getmaxx(stdscr);
221
222 attr_clear(stdscr, lines, columns, dlg.screen.atr);
223 /* Display background title if it exists ... - SLH */
224 if (dlg.backtitle != NULL) {
225 int i, len = 0, skip = 0;
226 struct subtitle_list *pos;
227
228 wattrset(stdscr, dlg.screen.atr);
229 mvwaddstr(stdscr, 0, 1, (char *)dlg.backtitle);
230
231 for (pos = dlg.subtitles; pos != NULL; pos = pos->next) {
232 /* 3 is for the arrow and spaces */
233 len += strlen(pos->text) + 3;
234 }
235
236 wmove(stdscr, 1, 1);
237 if (len > columns - 2) {
238 const char *ellipsis = "[...] ";
239 waddstr(stdscr, ellipsis);
240 skip = len - (columns - 2 - strlen(ellipsis));
241 }
242
243 for (pos = dlg.subtitles; pos != NULL; pos = pos->next) {
244 if (skip == 0)
245 waddch(stdscr, ACS_RARROW);
246 else
247 skip--;
248
249 if (skip == 0)
250 waddch(stdscr, ' ');
251 else
252 skip--;
253
254 if (skip < strlen(pos->text)) {
255 waddstr(stdscr, pos->text + skip);
256 skip = 0;
257 } else
258 skip -= strlen(pos->text);
259
260 if (skip == 0)
261 waddch(stdscr, ' ');
262 else
263 skip--;
264 }
265
266 for (i = len + 1; i < columns - 1; i++)
267 waddch(stdscr, ACS_HLINE);
268 }
269 wnoutrefresh(stdscr);
270 }
271
272 /*
273 * Do some initialization for dialog
274 */
init_dialog(const char * backtitle)275 int init_dialog(const char *backtitle)
276 {
277 int height, width;
278
279 initscr(); /* Init curses */
280
281 /* Get current cursor position for signal handler in mconf.c */
282 getyx(stdscr, saved_y, saved_x);
283
284 getmaxyx(stdscr, height, width);
285 if (height < WINDOW_HEIGHT_MIN || width < WINDOW_WIDTH_MIN) {
286 endwin();
287 return -ERRDISPLAYTOOSMALL;
288 }
289
290 dlg.backtitle = backtitle;
291 color_setup(getenv("MENUCONFIG_COLOR"));
292
293 keypad(stdscr, TRUE);
294 cbreak();
295 noecho();
296 dialog_clear();
297
298 return 0;
299 }
300
set_dialog_backtitle(const char * backtitle)301 void set_dialog_backtitle(const char *backtitle)
302 {
303 dlg.backtitle = backtitle;
304 }
305
set_dialog_subtitles(struct subtitle_list * subtitles)306 void set_dialog_subtitles(struct subtitle_list *subtitles)
307 {
308 dlg.subtitles = subtitles;
309 }
310
311 /*
312 * End using dialog functions.
313 */
end_dialog(int x,int y)314 void end_dialog(int x, int y)
315 {
316 /* move cursor back to original position */
317 move(y, x);
318 refresh();
319 endwin();
320 }
321
322 /* Print the title of the dialog. Center the title and truncate
323 * tile if wider than dialog (- 2 chars).
324 **/
print_title(WINDOW * dialog,const char * title,int width)325 void print_title(WINDOW *dialog, const char *title, int width)
326 {
327 if (title) {
328 int tlen = MIN(width - 2, strlen(title));
329 wattrset(dialog, dlg.title.atr);
330 mvwaddch(dialog, 0, (width - tlen) / 2 - 1, ' ');
331 mvwaddnstr(dialog, 0, (width - tlen)/2, title, tlen);
332 waddch(dialog, ' ');
333 }
334 }
335
336 /*
337 * Print a string of text in a window, automatically wrap around to the
338 * next line if the string is too long to fit on one line. Newline
339 * characters '\n' are properly processed. We start on a new line
340 * if there is no room for at least 4 nonblanks following a double-space.
341 */
print_autowrap(WINDOW * win,const char * prompt,int width,int y,int x)342 void print_autowrap(WINDOW * win, const char *prompt, int width, int y, int x)
343 {
344 int newl, cur_x, cur_y;
345 int prompt_len, room, wlen;
346 char tempstr[MAX_LEN + 1], *word, *sp, *sp2, *newline_separator = 0;
347
348 strcpy(tempstr, prompt);
349
350 prompt_len = strlen(tempstr);
351
352 if (prompt_len <= width - x * 2) { /* If prompt is short */
353 wmove(win, y, (width - prompt_len) / 2);
354 waddstr(win, tempstr);
355 } else {
356 cur_x = x;
357 cur_y = y;
358 newl = 1;
359 word = tempstr;
360 while (word && *word) {
361 sp = strpbrk(word, "\n ");
362 if (sp && *sp == '\n')
363 newline_separator = sp;
364
365 if (sp)
366 *sp++ = 0;
367
368 /* Wrap to next line if either the word does not fit,
369 or it is the first word of a new sentence, and it is
370 short, and the next word does not fit. */
371 room = width - cur_x;
372 wlen = strlen(word);
373 if (wlen > room ||
374 (newl && wlen < 4 && sp
375 && wlen + 1 + strlen(sp) > room
376 && (!(sp2 = strpbrk(sp, "\n "))
377 || wlen + 1 + (sp2 - sp) > room))) {
378 cur_y++;
379 cur_x = x;
380 }
381 wmove(win, cur_y, cur_x);
382 waddstr(win, word);
383 getyx(win, cur_y, cur_x);
384
385 /* Move to the next line if the word separator was a newline */
386 if (newline_separator) {
387 cur_y++;
388 cur_x = x;
389 newline_separator = 0;
390 } else
391 cur_x++;
392
393 if (sp && *sp == ' ') {
394 cur_x++; /* double space */
395 while (*++sp == ' ') ;
396 newl = 1;
397 } else
398 newl = 0;
399 word = sp;
400 }
401 }
402 }
403
404 /*
405 * Print a button
406 */
print_button(WINDOW * win,const char * label,int y,int x,int selected)407 void print_button(WINDOW * win, const char *label, int y, int x, int selected)
408 {
409 int i, temp;
410
411 wmove(win, y, x);
412 wattrset(win, selected ? dlg.button_active.atr
413 : dlg.button_inactive.atr);
414 waddstr(win, "<");
415 temp = strspn(label, " ");
416 label += temp;
417 wattrset(win, selected ? dlg.button_label_active.atr
418 : dlg.button_label_inactive.atr);
419 for (i = 0; i < temp; i++)
420 waddch(win, ' ');
421 wattrset(win, selected ? dlg.button_key_active.atr
422 : dlg.button_key_inactive.atr);
423 waddch(win, label[0]);
424 wattrset(win, selected ? dlg.button_label_active.atr
425 : dlg.button_label_inactive.atr);
426 waddstr(win, (char *)label + 1);
427 wattrset(win, selected ? dlg.button_active.atr
428 : dlg.button_inactive.atr);
429 waddstr(win, ">");
430 wmove(win, y, x + temp + 1);
431 }
432
433 /*
434 * Draw a rectangular box with line drawing characters
435 */
436 void
draw_box(WINDOW * win,int y,int x,int height,int width,chtype box,chtype border)437 draw_box(WINDOW * win, int y, int x, int height, int width,
438 chtype box, chtype border)
439 {
440 int i, j;
441
442 wattrset(win, 0);
443 for (i = 0; i < height; i++) {
444 wmove(win, y + i, x);
445 for (j = 0; j < width; j++)
446 if (!i && !j)
447 waddch(win, border | ACS_ULCORNER);
448 else if (i == height - 1 && !j)
449 waddch(win, border | ACS_LLCORNER);
450 else if (!i && j == width - 1)
451 waddch(win, box | ACS_URCORNER);
452 else if (i == height - 1 && j == width - 1)
453 waddch(win, box | ACS_LRCORNER);
454 else if (!i)
455 waddch(win, border | ACS_HLINE);
456 else if (i == height - 1)
457 waddch(win, box | ACS_HLINE);
458 else if (!j)
459 waddch(win, border | ACS_VLINE);
460 else if (j == width - 1)
461 waddch(win, box | ACS_VLINE);
462 else
463 waddch(win, box | ' ');
464 }
465 }
466
467 /*
468 * Draw shadows along the right and bottom edge to give a more 3D look
469 * to the boxes
470 */
draw_shadow(WINDOW * win,int y,int x,int height,int width)471 void draw_shadow(WINDOW * win, int y, int x, int height, int width)
472 {
473 int i;
474
475 if (has_colors()) { /* Whether terminal supports color? */
476 wattrset(win, dlg.shadow.atr);
477 wmove(win, y + height, x + 2);
478 for (i = 0; i < width; i++)
479 waddch(win, winch(win) & A_CHARTEXT);
480 for (i = y + 1; i < y + height + 1; i++) {
481 wmove(win, i, x + width);
482 waddch(win, winch(win) & A_CHARTEXT);
483 waddch(win, winch(win) & A_CHARTEXT);
484 }
485 wnoutrefresh(win);
486 }
487 }
488
489 /*
490 * Return the position of the first alphabetic character in a string.
491 */
first_alpha(const char * string,const char * exempt)492 int first_alpha(const char *string, const char *exempt)
493 {
494 int i, in_paren = 0, c;
495
496 for (i = 0; i < strlen(string); i++) {
497 c = tolower(string[i]);
498
499 if (strchr("<[(", c))
500 ++in_paren;
501 if (strchr(">])", c) && in_paren > 0)
502 --in_paren;
503
504 if ((!in_paren) && isalpha(c) && strchr(exempt, c) == 0)
505 return i;
506 }
507
508 return 0;
509 }
510
511 /*
512 * ncurses uses ESC to detect escaped char sequences. This resutl in
513 * a small timeout before ESC is actually delivered to the application.
514 * lxdialog suggest <ESC> <ESC> which is correctly translated to two
515 * times esc. But then we need to ignore the second esc to avoid stepping
516 * out one menu too much. Filter away all escaped key sequences since
517 * keypad(FALSE) turn off ncurses support for escape sequences - and that's
518 * needed to make notimeout() do as expected.
519 */
on_key_esc(WINDOW * win)520 int on_key_esc(WINDOW *win)
521 {
522 int key;
523 int key2;
524 int key3;
525
526 nodelay(win, TRUE);
527 keypad(win, FALSE);
528 key = wgetch(win);
529 key2 = wgetch(win);
530 do {
531 key3 = wgetch(win);
532 } while (key3 != ERR);
533 nodelay(win, FALSE);
534 keypad(win, TRUE);
535 if (key == KEY_ESC && key2 == ERR)
536 return KEY_ESC;
537 else if (key != ERR && key != KEY_ESC && key2 == ERR)
538 ungetch(key);
539
540 return -1;
541 }
542
543 /* redraw screen in new size */
on_key_resize(void)544 int on_key_resize(void)
545 {
546 dialog_clear();
547 return KEY_RESIZE;
548 }
549
550 struct dialog_list *item_cur;
551 struct dialog_list item_nil;
552 struct dialog_list *item_head;
553
item_reset(void)554 void item_reset(void)
555 {
556 struct dialog_list *p, *next;
557
558 for (p = item_head; p; p = next) {
559 next = p->next;
560 free(p);
561 }
562 item_head = NULL;
563 item_cur = &item_nil;
564 }
565
item_make(const char * fmt,...)566 void item_make(const char *fmt, ...)
567 {
568 va_list ap;
569 struct dialog_list *p = malloc(sizeof(*p));
570
571 if (item_head)
572 item_cur->next = p;
573 else
574 item_head = p;
575 item_cur = p;
576 memset(p, 0, sizeof(*p));
577
578 va_start(ap, fmt);
579 vsnprintf(item_cur->node.str, sizeof(item_cur->node.str), fmt, ap);
580 va_end(ap);
581 }
582
item_add_str(const char * fmt,...)583 void item_add_str(const char *fmt, ...)
584 {
585 va_list ap;
586 size_t avail;
587
588 avail = sizeof(item_cur->node.str) - strlen(item_cur->node.str);
589
590 va_start(ap, fmt);
591 vsnprintf(item_cur->node.str + strlen(item_cur->node.str),
592 avail, fmt, ap);
593 item_cur->node.str[sizeof(item_cur->node.str) - 1] = '\0';
594 va_end(ap);
595 }
596
item_set_tag(char tag)597 void item_set_tag(char tag)
598 {
599 item_cur->node.tag = tag;
600 }
item_set_data(void * ptr)601 void item_set_data(void *ptr)
602 {
603 item_cur->node.data = ptr;
604 }
605
item_set_selected(int val)606 void item_set_selected(int val)
607 {
608 item_cur->node.selected = val;
609 }
610
item_activate_selected(void)611 int item_activate_selected(void)
612 {
613 item_foreach()
614 if (item_is_selected())
615 return 1;
616 return 0;
617 }
618
item_data(void)619 void *item_data(void)
620 {
621 return item_cur->node.data;
622 }
623
item_tag(void)624 char item_tag(void)
625 {
626 return item_cur->node.tag;
627 }
628
item_count(void)629 int item_count(void)
630 {
631 int n = 0;
632 struct dialog_list *p;
633
634 for (p = item_head; p; p = p->next)
635 n++;
636 return n;
637 }
638
item_set(int n)639 void item_set(int n)
640 {
641 int i = 0;
642 item_foreach()
643 if (i++ == n)
644 return;
645 }
646
item_n(void)647 int item_n(void)
648 {
649 int n = 0;
650 struct dialog_list *p;
651
652 for (p = item_head; p; p = p->next) {
653 if (p == item_cur)
654 return n;
655 n++;
656 }
657 return 0;
658 }
659
item_str(void)660 const char *item_str(void)
661 {
662 return item_cur->node.str;
663 }
664
item_is_selected(void)665 int item_is_selected(void)
666 {
667 return (item_cur->node.selected != 0);
668 }
669
item_is_tag(char tag)670 int item_is_tag(char tag)
671 {
672 return (item_cur->node.tag == tag);
673 }
674