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1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * util.c
4 *
5 * ORIGINAL AUTHOR: Savio Lam ([email protected])
6 * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap ([email protected])
7 */
8
9#include <stdarg.h>
10
11#include "dialog.h"
12
13/* Needed in signal handler in mconf.c */
14int saved_x, saved_y;
15
16struct dialog_info dlg;
17
18static 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) \
39do { \
40 dlg.dialog.fg = (f); \
41 dlg.dialog.bg = (b); \
42 dlg.dialog.hl = (h); \
43} while (0)
44
45static 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
74static 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
111static 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 */
126static 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
143static 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
155static 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 */
187static 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 */
202void 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
215void 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 */
275int 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
301void set_dialog_backtitle(const char *backtitle)
302{
303 dlg.backtitle = backtitle;
304}
305
306void set_dialog_subtitles(struct subtitle_list *subtitles)
307{
308 dlg.subtitles = subtitles;
309}
310
311/*
312 * End using dialog functions.
313 */
314void 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 **/
325void 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 */
342void 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 snprintf(tempstr, sizeof(tempstr), "%s", prompt);
349 prompt_len = strlen(tempstr);
350
351 if (prompt_len <= width - x * 2) { /* If prompt is short */
352 wmove(win, y, (width - prompt_len) / 2);
353 waddstr(win, tempstr);
354 } else {
355 cur_x = x;
356 cur_y = y;
357 newl = 1;
358 word = tempstr;
359 while (word && *word) {
360 sp = strpbrk(word, "\n ");
361 if (sp && *sp == '\n')
362 newline_separator = sp;
363
364 if (sp)
365 *sp++ = 0;
366
367 /* Wrap to next line if either the word does not fit,
368 or it is the first word of a new sentence, and it is
369 short, and the next word does not fit. */
370 room = width - cur_x;
371 wlen = strlen(word);
372 if (wlen > room ||
373 (newl && wlen < 4 && sp
374 && wlen + 1 + strlen(sp) > room
375 && (!(sp2 = strpbrk(sp, "\n "))
376 || wlen + 1 + (sp2 - sp) > room))) {
377 cur_y++;
378 cur_x = x;
379 }
380 wmove(win, cur_y, cur_x);
381 waddstr(win, word);
382 getyx(win, cur_y, cur_x);
383
384 /* Move to the next line if the word separator was a newline */
385 if (newline_separator) {
386 cur_y++;
387 cur_x = x;
388 newline_separator = 0;
389 } else
390 cur_x++;
391
392 if (sp && *sp == ' ') {
393 cur_x++; /* double space */
394 while (*++sp == ' ') ;
395 newl = 1;
396 } else
397 newl = 0;
398 word = sp;
399 }
400 }
401}
402
403/*
404 * Print a button
405 */
406void print_button(WINDOW * win, const char *label, int y, int x, int selected)
407{
408 int i, temp;
409
410 wmove(win, y, x);
411 wattrset(win, selected ? dlg.button_active.atr
412 : dlg.button_inactive.atr);
413 waddstr(win, "<");
414 temp = strspn(label, " ");
415 label += temp;
416 wattrset(win, selected ? dlg.button_label_active.atr
417 : dlg.button_label_inactive.atr);
418 for (i = 0; i < temp; i++)
419 waddch(win, ' ');
420 wattrset(win, selected ? dlg.button_key_active.atr
421 : dlg.button_key_inactive.atr);
422 waddch(win, label[0]);
423 wattrset(win, selected ? dlg.button_label_active.atr
424 : dlg.button_label_inactive.atr);
425 waddstr(win, (char *)label + 1);
426 wattrset(win, selected ? dlg.button_active.atr
427 : dlg.button_inactive.atr);
428 waddstr(win, ">");
429 wmove(win, y, x + temp + 1);
430}
431
432/*
433 * Draw a rectangular box with line drawing characters
434 */
435void
436draw_box(WINDOW * win, int y, int x, int height, int width,
437 chtype box, chtype border)
438{
439 int i, j;
440
441 wattrset(win, 0);
442 for (i = 0; i < height; i++) {
443 wmove(win, y + i, x);
444 for (j = 0; j < width; j++)
445 if (!i && !j)
446 waddch(win, border | ACS_ULCORNER);
447 else if (i == height - 1 && !j)
448 waddch(win, border | ACS_LLCORNER);
449 else if (!i && j == width - 1)
450 waddch(win, box | ACS_URCORNER);
451 else if (i == height - 1 && j == width - 1)
452 waddch(win, box | ACS_LRCORNER);
453 else if (!i)
454 waddch(win, border | ACS_HLINE);
455 else if (i == height - 1)
456 waddch(win, box | ACS_HLINE);
457 else if (!j)
458 waddch(win, border | ACS_VLINE);
459 else if (j == width - 1)
460 waddch(win, box | ACS_VLINE);
461 else
462 waddch(win, box | ' ');
463 }
464}
465
466/*
467 * Draw shadows along the right and bottom edge to give a more 3D look
468 * to the boxes
469 */
470void draw_shadow(WINDOW * win, int y, int x, int height, int width)
471{
472 int i;
473
474 if (has_colors()) { /* Whether terminal supports color? */
475 wattrset(win, dlg.shadow.atr);
476 wmove(win, y + height, x + 2);
477 for (i = 0; i < width; i++)
478 waddch(win, winch(win) & A_CHARTEXT);
479 for (i = y + 1; i < y + height + 1; i++) {
480 wmove(win, i, x + width);
481 waddch(win, winch(win) & A_CHARTEXT);
482 waddch(win, winch(win) & A_CHARTEXT);
483 }
484 wnoutrefresh(win);
485 }
486}
487
488/*
489 * Return the position of the first alphabetic character in a string.
490 */
491int first_alpha(const char *string, const char *exempt)
492{
493 int i, in_paren = 0, c;
494
495 for (i = 0; i < strlen(string); i++) {
496 c = tolower(string[i]);
497
498 if (strchr("<[(", c))
499 ++in_paren;
500 if (strchr(">])", c) && in_paren > 0)
501 --in_paren;
502
503 if ((!in_paren) && isalpha(c) && strchr(exempt, c) == 0)
504 return i;
505 }
506
507 return 0;
508}
509
510/*
511 * ncurses uses ESC to detect escaped char sequences. This resutl in
512 * a small timeout before ESC is actually delivered to the application.
513 * lxdialog suggest <ESC> <ESC> which is correctly translated to two
514 * times esc. But then we need to ignore the second esc to avoid stepping
515 * out one menu too much. Filter away all escaped key sequences since
516 * keypad(FALSE) turn off ncurses support for escape sequences - and that's
517 * needed to make notimeout() do as expected.
518 */
519int on_key_esc(WINDOW *win)
520{
521 int key;
522 int key2;
523 int key3;
524
525 nodelay(win, TRUE);
526 keypad(win, FALSE);
527 key = wgetch(win);
528 key2 = wgetch(win);
529 do {
530 key3 = wgetch(win);
531 } while (key3 != ERR);
532 nodelay(win, FALSE);
533 keypad(win, TRUE);
534 if (key == KEY_ESC && key2 == ERR)
535 return KEY_ESC;
536 else if (key != ERR && key != KEY_ESC && key2 == ERR)
537 ungetch(key);
538
539 return -1;
540}
541
542/* redraw screen in new size */
543int on_key_resize(void)
544{
545 dialog_clear();
546 return KEY_RESIZE;
547}
548
549struct dialog_list *item_cur;
550struct dialog_list item_nil;
551struct dialog_list *item_head;
552
553void item_reset(void)
554{
555 struct dialog_list *p, *next;
556
557 for (p = item_head; p; p = next) {
558 next = p->next;
559 free(p);
560 }
561 item_head = NULL;
562 item_cur = &item_nil;
563}
564
565void item_make(const char *fmt, ...)
566{
567 va_list ap;
568 struct dialog_list *p = malloc(sizeof(*p));
569
570 if (item_head)
571 item_cur->next = p;
572 else
573 item_head = p;
574 item_cur = p;
575 memset(p, 0, sizeof(*p));
576
577 va_start(ap, fmt);
578 vsnprintf(item_cur->node.str, sizeof(item_cur->node.str), fmt, ap);
579 va_end(ap);
580}
581
582void item_add_str(const char *fmt, ...)
583{
584 va_list ap;
585 size_t avail;
586
587 avail = sizeof(item_cur->node.str) - strlen(item_cur->node.str);
588
589 va_start(ap, fmt);
590 vsnprintf(item_cur->node.str + strlen(item_cur->node.str),
591 avail, fmt, ap);
592 item_cur->node.str[sizeof(item_cur->node.str) - 1] = '\0';
593 va_end(ap);
594}
595
596void item_set_tag(char tag)
597{
598 item_cur->node.tag = tag;
599}
600void item_set_data(void *ptr)
601{
602 item_cur->node.data = ptr;
603}
604
605void item_set_selected(int val)
606{
607 item_cur->node.selected = val;
608}
609
610int item_activate_selected(void)
611{
612 item_foreach()
613 if (item_is_selected())
614 return 1;
615 return 0;
616}
617
618void *item_data(void)
619{
620 return item_cur->node.data;
621}
622
623char item_tag(void)
624{
625 return item_cur->node.tag;
626}
627
628int item_count(void)
629{
630 int n = 0;
631 struct dialog_list *p;
632
633 for (p = item_head; p; p = p->next)
634 n++;
635 return n;
636}
637
638void item_set(int n)
639{
640 int i = 0;
641 item_foreach()
642 if (i++ == n)
643 return;
644}
645
646int item_n(void)
647{
648 int n = 0;
649 struct dialog_list *p;
650
651 for (p = item_head; p; p = p->next) {
652 if (p == item_cur)
653 return n;
654 n++;
655 }
656 return 0;
657}
658
659const char *item_str(void)
660{
661 return item_cur->node.str;
662}
663
664int item_is_selected(void)
665{
666 return (item_cur->node.selected != 0);
667}
668
669int item_is_tag(char tag)
670{
671 return (item_cur->node.tag == tag);
672}