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1/*
2 * util.c
3 *
4 * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
5 * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22#include <stdarg.h>
23
24#include "dialog.h"
25
26/* Needed in signal handler in mconf.c */
27int saved_x, saved_y;
28
29struct dialog_info dlg;
30
31static void set_mono_theme(void)
32{
33 dlg.screen.atr = A_NORMAL;
34 dlg.shadow.atr = A_NORMAL;
35 dlg.dialog.atr = A_NORMAL;
36 dlg.title.atr = A_BOLD;
37 dlg.border.atr = A_NORMAL;
38 dlg.button_active.atr = A_REVERSE;
39 dlg.button_inactive.atr = A_DIM;
40 dlg.button_key_active.atr = A_REVERSE;
41 dlg.button_key_inactive.atr = A_BOLD;
42 dlg.button_label_active.atr = A_REVERSE;
43 dlg.button_label_inactive.atr = A_NORMAL;
44 dlg.inputbox.atr = A_NORMAL;
45 dlg.inputbox_border.atr = A_NORMAL;
46 dlg.searchbox.atr = A_NORMAL;
47 dlg.searchbox_title.atr = A_BOLD;
48 dlg.searchbox_border.atr = A_NORMAL;
49 dlg.position_indicator.atr = A_BOLD;
50 dlg.menubox.atr = A_NORMAL;
51 dlg.menubox_border.atr = A_NORMAL;
52 dlg.item.atr = A_NORMAL;
53 dlg.item_selected.atr = A_REVERSE;
54 dlg.tag.atr = A_BOLD;
55 dlg.tag_selected.atr = A_REVERSE;
56 dlg.tag_key.atr = A_BOLD;
57 dlg.tag_key_selected.atr = A_REVERSE;
58 dlg.check.atr = A_BOLD;
59 dlg.check_selected.atr = A_REVERSE;
60 dlg.uarrow.atr = A_BOLD;
61 dlg.darrow.atr = A_BOLD;
62}
63
64#define DLG_COLOR(dialog, f, b, h) \
65do { \
66 dlg.dialog.fg = (f); \
67 dlg.dialog.bg = (b); \
68 dlg.dialog.hl = (h); \
69} while (0)
70
71static void set_classic_theme(void)
72{
73 DLG_COLOR(screen, COLOR_CYAN, COLOR_BLUE, true);
74 DLG_COLOR(shadow, COLOR_BLACK, COLOR_BLACK, true);
75 DLG_COLOR(dialog, COLOR_BLACK, COLOR_WHITE, false);
76 DLG_COLOR(title, COLOR_YELLOW, COLOR_WHITE, true);
77 DLG_COLOR(border, COLOR_WHITE, COLOR_WHITE, true);
78 DLG_COLOR(button_active, COLOR_WHITE, COLOR_BLUE, true);
79 DLG_COLOR(button_inactive, COLOR_BLACK, COLOR_WHITE, false);
80 DLG_COLOR(button_key_active, COLOR_WHITE, COLOR_BLUE, true);
81 DLG_COLOR(button_key_inactive, COLOR_RED, COLOR_WHITE, false);
82 DLG_COLOR(button_label_active, COLOR_YELLOW, COLOR_BLUE, true);
83 DLG_COLOR(button_label_inactive, COLOR_BLACK, COLOR_WHITE, true);
84 DLG_COLOR(inputbox, COLOR_BLACK, COLOR_WHITE, false);
85 DLG_COLOR(inputbox_border, COLOR_BLACK, COLOR_WHITE, false);
86 DLG_COLOR(searchbox, COLOR_BLACK, COLOR_WHITE, false);
87 DLG_COLOR(searchbox_title, COLOR_YELLOW, COLOR_WHITE, true);
88 DLG_COLOR(searchbox_border, COLOR_WHITE, COLOR_WHITE, true);
89 DLG_COLOR(position_indicator, COLOR_YELLOW, COLOR_WHITE, true);
90 DLG_COLOR(menubox, COLOR_BLACK, COLOR_WHITE, false);
91 DLG_COLOR(menubox_border, COLOR_WHITE, COLOR_WHITE, true);
92 DLG_COLOR(item, COLOR_BLACK, COLOR_WHITE, false);
93 DLG_COLOR(item_selected, COLOR_WHITE, COLOR_BLUE, true);
94 DLG_COLOR(tag, COLOR_YELLOW, COLOR_WHITE, true);
95 DLG_COLOR(tag_selected, COLOR_YELLOW, COLOR_BLUE, true);
96 DLG_COLOR(tag_key, COLOR_YELLOW, COLOR_WHITE, true);
97 DLG_COLOR(tag_key_selected, COLOR_YELLOW, COLOR_BLUE, true);
98 DLG_COLOR(check, COLOR_BLACK, COLOR_WHITE, false);
99 DLG_COLOR(check_selected, COLOR_WHITE, COLOR_BLUE, true);
100 DLG_COLOR(uarrow, COLOR_GREEN, COLOR_WHITE, true);
101 DLG_COLOR(darrow, COLOR_GREEN, COLOR_WHITE, true);
102}
103
104static void set_blackbg_theme(void)
105{
106 DLG_COLOR(screen, COLOR_RED, COLOR_BLACK, true);
107 DLG_COLOR(shadow, COLOR_BLACK, COLOR_BLACK, false);
108 DLG_COLOR(dialog, COLOR_WHITE, COLOR_BLACK, false);
109 DLG_COLOR(title, COLOR_RED, COLOR_BLACK, false);
110 DLG_COLOR(border, COLOR_BLACK, COLOR_BLACK, true);
111
112 DLG_COLOR(button_active, COLOR_YELLOW, COLOR_RED, false);
113 DLG_COLOR(button_inactive, COLOR_YELLOW, COLOR_BLACK, false);
114 DLG_COLOR(button_key_active, COLOR_YELLOW, COLOR_RED, true);
115 DLG_COLOR(button_key_inactive, COLOR_RED, COLOR_BLACK, false);
116 DLG_COLOR(button_label_active, COLOR_WHITE, COLOR_RED, false);
117 DLG_COLOR(button_label_inactive, COLOR_BLACK, COLOR_BLACK, true);
118
119 DLG_COLOR(inputbox, COLOR_YELLOW, COLOR_BLACK, false);
120 DLG_COLOR(inputbox_border, COLOR_YELLOW, COLOR_BLACK, false);
121
122 DLG_COLOR(searchbox, COLOR_YELLOW, COLOR_BLACK, false);
123 DLG_COLOR(searchbox_title, COLOR_YELLOW, COLOR_BLACK, true);
124 DLG_COLOR(searchbox_border, COLOR_BLACK, COLOR_BLACK, true);
125
126 DLG_COLOR(position_indicator, COLOR_RED, COLOR_BLACK, false);
127
128 DLG_COLOR(menubox, COLOR_YELLOW, COLOR_BLACK, false);
129 DLG_COLOR(menubox_border, COLOR_BLACK, COLOR_BLACK, true);
130
131 DLG_COLOR(item, COLOR_WHITE, COLOR_BLACK, false);
132 DLG_COLOR(item_selected, COLOR_WHITE, COLOR_RED, false);
133
134 DLG_COLOR(tag, COLOR_RED, COLOR_BLACK, false);
135 DLG_COLOR(tag_selected, COLOR_YELLOW, COLOR_RED, true);
136 DLG_COLOR(tag_key, COLOR_RED, COLOR_BLACK, false);
137 DLG_COLOR(tag_key_selected, COLOR_YELLOW, COLOR_RED, true);
138
139 DLG_COLOR(check, COLOR_YELLOW, COLOR_BLACK, false);
140 DLG_COLOR(check_selected, COLOR_YELLOW, COLOR_RED, true);
141
142 DLG_COLOR(uarrow, COLOR_RED, COLOR_BLACK, false);
143 DLG_COLOR(darrow, COLOR_RED, COLOR_BLACK, false);
144}
145
146static void set_bluetitle_theme(void)
147{
148 set_classic_theme();
149 DLG_COLOR(title, COLOR_BLUE, COLOR_WHITE, true);
150 DLG_COLOR(button_key_active, COLOR_YELLOW, COLOR_BLUE, true);
151 DLG_COLOR(button_label_active, COLOR_WHITE, COLOR_BLUE, true);
152 DLG_COLOR(searchbox_title, COLOR_BLUE, COLOR_WHITE, true);
153 DLG_COLOR(position_indicator, COLOR_BLUE, COLOR_WHITE, true);
154 DLG_COLOR(tag, COLOR_BLUE, COLOR_WHITE, true);
155 DLG_COLOR(tag_key, COLOR_BLUE, COLOR_WHITE, true);
156
157}
158
159/*
160 * Select color theme
161 */
162static int set_theme(const char *theme)
163{
164 int use_color = 1;
165 if (!theme)
166 set_bluetitle_theme();
167 else if (strcmp(theme, "classic") == 0)
168 set_classic_theme();
169 else if (strcmp(theme, "bluetitle") == 0)
170 set_bluetitle_theme();
171 else if (strcmp(theme, "blackbg") == 0)
172 set_blackbg_theme();
173 else if (strcmp(theme, "mono") == 0)
174 use_color = 0;
175
176 return use_color;
177}
178
179static void init_one_color(struct dialog_color *color)
180{
181 static int pair = 0;
182
183 pair++;
184 init_pair(pair, color->fg, color->bg);
185 if (color->hl)
186 color->atr = A_BOLD | COLOR_PAIR(pair);
187 else
188 color->atr = COLOR_PAIR(pair);
189}
190
191static void init_dialog_colors(void)
192{
193 init_one_color(&dlg.screen);
194 init_one_color(&dlg.shadow);
195 init_one_color(&dlg.dialog);
196 init_one_color(&dlg.title);
197 init_one_color(&dlg.border);
198 init_one_color(&dlg.button_active);
199 init_one_color(&dlg.button_inactive);
200 init_one_color(&dlg.button_key_active);
201 init_one_color(&dlg.button_key_inactive);
202 init_one_color(&dlg.button_label_active);
203 init_one_color(&dlg.button_label_inactive);
204 init_one_color(&dlg.inputbox);
205 init_one_color(&dlg.inputbox_border);
206 init_one_color(&dlg.searchbox);
207 init_one_color(&dlg.searchbox_title);
208 init_one_color(&dlg.searchbox_border);
209 init_one_color(&dlg.position_indicator);
210 init_one_color(&dlg.menubox);
211 init_one_color(&dlg.menubox_border);
212 init_one_color(&dlg.item);
213 init_one_color(&dlg.item_selected);
214 init_one_color(&dlg.tag);
215 init_one_color(&dlg.tag_selected);
216 init_one_color(&dlg.tag_key);
217 init_one_color(&dlg.tag_key_selected);
218 init_one_color(&dlg.check);
219 init_one_color(&dlg.check_selected);
220 init_one_color(&dlg.uarrow);
221 init_one_color(&dlg.darrow);
222}
223
224/*
225 * Setup for color display
226 */
227static void color_setup(const char *theme)
228{
229 int use_color;
230
231 use_color = set_theme(theme);
232 if (use_color && has_colors()) {
233 start_color();
234 init_dialog_colors();
235 } else
236 set_mono_theme();
237}
238
239/*
240 * Set window to attribute 'attr'
241 */
242void attr_clear(WINDOW * win, int height, int width, chtype attr)
243{
244 int i, j;
245
246 wattrset(win, attr);
247 for (i = 0; i < height; i++) {
248 wmove(win, i, 0);
249 for (j = 0; j < width; j++)
250 waddch(win, ' ');
251 }
252 touchwin(win);
253}
254
255void dialog_clear(void)
256{
257 int lines, columns;
258
259 lines = getmaxy(stdscr);
260 columns = getmaxx(stdscr);
261
262 attr_clear(stdscr, lines, columns, dlg.screen.atr);
263 /* Display background title if it exists ... - SLH */
264 if (dlg.backtitle != NULL) {
265 int i, len = 0, skip = 0;
266 struct subtitle_list *pos;
267
268 wattrset(stdscr, dlg.screen.atr);
269 mvwaddstr(stdscr, 0, 1, (char *)dlg.backtitle);
270
271 for (pos = dlg.subtitles; pos != NULL; pos = pos->next) {
272 /* 3 is for the arrow and spaces */
273 len += strlen(pos->text) + 3;
274 }
275
276 wmove(stdscr, 1, 1);
277 if (len > columns - 2) {
278 const char *ellipsis = "[...] ";
279 waddstr(stdscr, ellipsis);
280 skip = len - (columns - 2 - strlen(ellipsis));
281 }
282
283 for (pos = dlg.subtitles; pos != NULL; pos = pos->next) {
284 if (skip == 0)
285 waddch(stdscr, ACS_RARROW);
286 else
287 skip--;
288
289 if (skip == 0)
290 waddch(stdscr, ' ');
291 else
292 skip--;
293
294 if (skip < strlen(pos->text)) {
295 waddstr(stdscr, pos->text + skip);
296 skip = 0;
297 } else
298 skip -= strlen(pos->text);
299
300 if (skip == 0)
301 waddch(stdscr, ' ');
302 else
303 skip--;
304 }
305
306 for (i = len + 1; i < columns - 1; i++)
307 waddch(stdscr, ACS_HLINE);
308 }
309 wnoutrefresh(stdscr);
310}
311
312/*
313 * Do some initialization for dialog
314 */
315int init_dialog(const char *backtitle)
316{
317 int height, width;
318
319 initscr(); /* Init curses */
320
321 /* Get current cursor position for signal handler in mconf.c */
322 getyx(stdscr, saved_y, saved_x);
323
324 getmaxyx(stdscr, height, width);
325 if (height < WINDOW_HEIGTH_MIN || width < WINDOW_WIDTH_MIN) {
326 endwin();
327 return -ERRDISPLAYTOOSMALL;
328 }
329
330 dlg.backtitle = backtitle;
331 color_setup(getenv("MENUCONFIG_COLOR"));
332
333 keypad(stdscr, TRUE);
334 cbreak();
335 noecho();
336 dialog_clear();
337
338 return 0;
339}
340
341void set_dialog_backtitle(const char *backtitle)
342{
343 dlg.backtitle = backtitle;
344}
345
346void set_dialog_subtitles(struct subtitle_list *subtitles)
347{
348 dlg.subtitles = subtitles;
349}
350
351/*
352 * End using dialog functions.
353 */
354void end_dialog(int x, int y)
355{
356 /* move cursor back to original position */
357 move(y, x);
358 refresh();
359 endwin();
360}
361
362/* Print the title of the dialog. Center the title and truncate
363 * tile if wider than dialog (- 2 chars).
364 **/
365void print_title(WINDOW *dialog, const char *title, int width)
366{
367 if (title) {
368 int tlen = MIN(width - 2, strlen(title));
369 wattrset(dialog, dlg.title.atr);
370 mvwaddch(dialog, 0, (width - tlen) / 2 - 1, ' ');
371 mvwaddnstr(dialog, 0, (width - tlen)/2, title, tlen);
372 waddch(dialog, ' ');
373 }
374}
375
376/*
377 * Print a string of text in a window, automatically wrap around to the
378 * next line if the string is too long to fit on one line. Newline
379 * characters '\n' are propperly processed. We start on a new line
380 * if there is no room for at least 4 nonblanks following a double-space.
381 */
382void print_autowrap(WINDOW * win, const char *prompt, int width, int y, int x)
383{
384 int newl, cur_x, cur_y;
385 int prompt_len, room, wlen;
386 char tempstr[MAX_LEN + 1], *word, *sp, *sp2, *newline_separator = 0;
387
388 strcpy(tempstr, prompt);
389
390 prompt_len = strlen(tempstr);
391
392 if (prompt_len <= width - x * 2) { /* If prompt is short */
393 wmove(win, y, (width - prompt_len) / 2);
394 waddstr(win, tempstr);
395 } else {
396 cur_x = x;
397 cur_y = y;
398 newl = 1;
399 word = tempstr;
400 while (word && *word) {
401 sp = strpbrk(word, "\n ");
402 if (sp && *sp == '\n')
403 newline_separator = sp;
404
405 if (sp)
406 *sp++ = 0;
407
408 /* Wrap to next line if either the word does not fit,
409 or it is the first word of a new sentence, and it is
410 short, and the next word does not fit. */
411 room = width - cur_x;
412 wlen = strlen(word);
413 if (wlen > room ||
414 (newl && wlen < 4 && sp
415 && wlen + 1 + strlen(sp) > room
416 && (!(sp2 = strpbrk(sp, "\n "))
417 || wlen + 1 + (sp2 - sp) > room))) {
418 cur_y++;
419 cur_x = x;
420 }
421 wmove(win, cur_y, cur_x);
422 waddstr(win, word);
423 getyx(win, cur_y, cur_x);
424
425 /* Move to the next line if the word separator was a newline */
426 if (newline_separator) {
427 cur_y++;
428 cur_x = x;
429 newline_separator = 0;
430 } else
431 cur_x++;
432
433 if (sp && *sp == ' ') {
434 cur_x++; /* double space */
435 while (*++sp == ' ') ;
436 newl = 1;
437 } else
438 newl = 0;
439 word = sp;
440 }
441 }
442}
443
444/*
445 * Print a button
446 */
447void print_button(WINDOW * win, const char *label, int y, int x, int selected)
448{
449 int i, temp;
450
451 wmove(win, y, x);
452 wattrset(win, selected ? dlg.button_active.atr
453 : dlg.button_inactive.atr);
454 waddstr(win, "<");
455 temp = strspn(label, " ");
456 label += temp;
457 wattrset(win, selected ? dlg.button_label_active.atr
458 : dlg.button_label_inactive.atr);
459 for (i = 0; i < temp; i++)
460 waddch(win, ' ');
461 wattrset(win, selected ? dlg.button_key_active.atr
462 : dlg.button_key_inactive.atr);
463 waddch(win, label[0]);
464 wattrset(win, selected ? dlg.button_label_active.atr
465 : dlg.button_label_inactive.atr);
466 waddstr(win, (char *)label + 1);
467 wattrset(win, selected ? dlg.button_active.atr
468 : dlg.button_inactive.atr);
469 waddstr(win, ">");
470 wmove(win, y, x + temp + 1);
471}
472
473/*
474 * Draw a rectangular box with line drawing characters
475 */
476void
477draw_box(WINDOW * win, int y, int x, int height, int width,
478 chtype box, chtype border)
479{
480 int i, j;
481
482 wattrset(win, 0);
483 for (i = 0; i < height; i++) {
484 wmove(win, y + i, x);
485 for (j = 0; j < width; j++)
486 if (!i && !j)
487 waddch(win, border | ACS_ULCORNER);
488 else if (i == height - 1 && !j)
489 waddch(win, border | ACS_LLCORNER);
490 else if (!i && j == width - 1)
491 waddch(win, box | ACS_URCORNER);
492 else if (i == height - 1 && j == width - 1)
493 waddch(win, box | ACS_LRCORNER);
494 else if (!i)
495 waddch(win, border | ACS_HLINE);
496 else if (i == height - 1)
497 waddch(win, box | ACS_HLINE);
498 else if (!j)
499 waddch(win, border | ACS_VLINE);
500 else if (j == width - 1)
501 waddch(win, box | ACS_VLINE);
502 else
503 waddch(win, box | ' ');
504 }
505}
506
507/*
508 * Draw shadows along the right and bottom edge to give a more 3D look
509 * to the boxes
510 */
511void draw_shadow(WINDOW * win, int y, int x, int height, int width)
512{
513 int i;
514
515 if (has_colors()) { /* Whether terminal supports color? */
516 wattrset(win, dlg.shadow.atr);
517 wmove(win, y + height, x + 2);
518 for (i = 0; i < width; i++)
519 waddch(win, winch(win) & A_CHARTEXT);
520 for (i = y + 1; i < y + height + 1; i++) {
521 wmove(win, i, x + width);
522 waddch(win, winch(win) & A_CHARTEXT);
523 waddch(win, winch(win) & A_CHARTEXT);
524 }
525 wnoutrefresh(win);
526 }
527}
528
529/*
530 * Return the position of the first alphabetic character in a string.
531 */
532int first_alpha(const char *string, const char *exempt)
533{
534 int i, in_paren = 0, c;
535
536 for (i = 0; i < strlen(string); i++) {
537 c = tolower(string[i]);
538
539 if (strchr("<[(", c))
540 ++in_paren;
541 if (strchr(">])", c) && in_paren > 0)
542 --in_paren;
543
544 if ((!in_paren) && isalpha(c) && strchr(exempt, c) == 0)
545 return i;
546 }
547
548 return 0;
549}
550
551/*
552 * ncurses uses ESC to detect escaped char sequences. This resutl in
553 * a small timeout before ESC is actually delivered to the application.
554 * lxdialog suggest <ESC> <ESC> which is correctly translated to two
555 * times esc. But then we need to ignore the second esc to avoid stepping
556 * out one menu too much. Filter away all escaped key sequences since
557 * keypad(FALSE) turn off ncurses support for escape sequences - and thats
558 * needed to make notimeout() do as expected.
559 */
560int on_key_esc(WINDOW *win)
561{
562 int key;
563 int key2;
564 int key3;
565
566 nodelay(win, TRUE);
567 keypad(win, FALSE);
568 key = wgetch(win);
569 key2 = wgetch(win);
570 do {
571 key3 = wgetch(win);
572 } while (key3 != ERR);
573 nodelay(win, FALSE);
574 keypad(win, TRUE);
575 if (key == KEY_ESC && key2 == ERR)
576 return KEY_ESC;
577 else if (key != ERR && key != KEY_ESC && key2 == ERR)
578 ungetch(key);
579
580 return -1;
581}
582
583/* redraw screen in new size */
584int on_key_resize(void)
585{
586 dialog_clear();
587 return KEY_RESIZE;
588}
589
590struct dialog_list *item_cur;
591struct dialog_list item_nil;
592struct dialog_list *item_head;
593
594void item_reset(void)
595{
596 struct dialog_list *p, *next;
597
598 for (p = item_head; p; p = next) {
599 next = p->next;
600 free(p);
601 }
602 item_head = NULL;
603 item_cur = &item_nil;
604}
605
606void item_make(const char *fmt, ...)
607{
608 va_list ap;
609 struct dialog_list *p = malloc(sizeof(*p));
610
611 if (item_head)
612 item_cur->next = p;
613 else
614 item_head = p;
615 item_cur = p;
616 memset(p, 0, sizeof(*p));
617
618 va_start(ap, fmt);
619 vsnprintf(item_cur->node.str, sizeof(item_cur->node.str), fmt, ap);
620 va_end(ap);
621}
622
623void item_add_str(const char *fmt, ...)
624{
625 va_list ap;
626 size_t avail;
627
628 avail = sizeof(item_cur->node.str) - strlen(item_cur->node.str);
629
630 va_start(ap, fmt);
631 vsnprintf(item_cur->node.str + strlen(item_cur->node.str),
632 avail, fmt, ap);
633 item_cur->node.str[sizeof(item_cur->node.str) - 1] = '\0';
634 va_end(ap);
635}
636
637void item_set_tag(char tag)
638{
639 item_cur->node.tag = tag;
640}
641void item_set_data(void *ptr)
642{
643 item_cur->node.data = ptr;
644}
645
646void item_set_selected(int val)
647{
648 item_cur->node.selected = val;
649}
650
651int item_activate_selected(void)
652{
653 item_foreach()
654 if (item_is_selected())
655 return 1;
656 return 0;
657}
658
659void *item_data(void)
660{
661 return item_cur->node.data;
662}
663
664char item_tag(void)
665{
666 return item_cur->node.tag;
667}
668
669int item_count(void)
670{
671 int n = 0;
672 struct dialog_list *p;
673
674 for (p = item_head; p; p = p->next)
675 n++;
676 return n;
677}
678
679void item_set(int n)
680{
681 int i = 0;
682 item_foreach()
683 if (i++ == n)
684 return;
685}
686
687int item_n(void)
688{
689 int n = 0;
690 struct dialog_list *p;
691
692 for (p = item_head; p; p = p->next) {
693 if (p == item_cur)
694 return n;
695 n++;
696 }
697 return 0;
698}
699
700const char *item_str(void)
701{
702 return item_cur->node.str;
703}
704
705int item_is_selected(void)
706{
707 return (item_cur->node.selected != 0);
708}
709
710int item_is_tag(char tag)
711{
712 return (item_cur->node.tag == tag);
713}
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 */
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 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 */
407void 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 */
436void
437draw_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 */
471void 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 */
492int 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 */
520int 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 */
544int on_key_resize(void)
545{
546 dialog_clear();
547 return KEY_RESIZE;
548}
549
550struct dialog_list *item_cur;
551struct dialog_list item_nil;
552struct dialog_list *item_head;
553
554void 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
566void 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
583void 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
597void item_set_tag(char tag)
598{
599 item_cur->node.tag = tag;
600}
601void item_set_data(void *ptr)
602{
603 item_cur->node.data = ptr;
604}
605
606void item_set_selected(int val)
607{
608 item_cur->node.selected = val;
609}
610
611int item_activate_selected(void)
612{
613 item_foreach()
614 if (item_is_selected())
615 return 1;
616 return 0;
617}
618
619void *item_data(void)
620{
621 return item_cur->node.data;
622}
623
624char item_tag(void)
625{
626 return item_cur->node.tag;
627}
628
629int 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
639void item_set(int n)
640{
641 int i = 0;
642 item_foreach()
643 if (i++ == n)
644 return;
645}
646
647int 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
660const char *item_str(void)
661{
662 return item_cur->node.str;
663}
664
665int item_is_selected(void)
666{
667 return (item_cur->node.selected != 0);
668}
669
670int item_is_tag(char tag)
671{
672 return (item_cur->node.tag == tag);
673}