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