Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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 attr_clear(stdscr, LINES, COLS, dlg.screen.atr);
258 /* Display background title if it exists ... - SLH */
259 if (dlg.backtitle != NULL) {
260 int i;
261
262 wattrset(stdscr, dlg.screen.atr);
263 mvwaddstr(stdscr, 0, 1, (char *)dlg.backtitle);
264 wmove(stdscr, 1, 1);
265 for (i = 1; i < COLS - 1; i++)
266 waddch(stdscr, ACS_HLINE);
267 }
268 wnoutrefresh(stdscr);
269}
270
271/*
272 * Do some initialization for dialog
273 */
274int init_dialog(const char *backtitle)
275{
276 int height, width;
277
278 initscr(); /* Init curses */
279
280 /* Get current cursor position for signal handler in mconf.c */
281 getyx(stdscr, saved_y, saved_x);
282
283 getmaxyx(stdscr, height, width);
284 if (height < 19 || width < 80) {
285 endwin();
286 return -ERRDISPLAYTOOSMALL;
287 }
288
289 dlg.backtitle = backtitle;
290 color_setup(getenv("MENUCONFIG_COLOR"));
291
292 keypad(stdscr, TRUE);
293 cbreak();
294 noecho();
295 dialog_clear();
296
297 return 0;
298}
299
300void set_dialog_backtitle(const char *backtitle)
301{
302 dlg.backtitle = backtitle;
303}
304
305/*
306 * End using dialog functions.
307 */
308void end_dialog(int x, int y)
309{
310 /* move cursor back to original position */
311 move(y, x);
312 refresh();
313 endwin();
314}
315
316/* Print the title of the dialog. Center the title and truncate
317 * tile if wider than dialog (- 2 chars).
318 **/
319void print_title(WINDOW *dialog, const char *title, int width)
320{
321 if (title) {
322 int tlen = MIN(width - 2, strlen(title));
323 wattrset(dialog, dlg.title.atr);
324 mvwaddch(dialog, 0, (width - tlen) / 2 - 1, ' ');
325 mvwaddnstr(dialog, 0, (width - tlen)/2, title, tlen);
326 waddch(dialog, ' ');
327 }
328}
329
330/*
331 * Print a string of text in a window, automatically wrap around to the
332 * next line if the string is too long to fit on one line. Newline
333 * characters '\n' are replaced by spaces. We start on a new line
334 * if there is no room for at least 4 nonblanks following a double-space.
335 */
336void print_autowrap(WINDOW * win, const char *prompt, int width, int y, int x)
337{
338 int newl, cur_x, cur_y;
339 int i, prompt_len, room, wlen;
340 char tempstr[MAX_LEN + 1], *word, *sp, *sp2;
341
342 strcpy(tempstr, prompt);
343
344 prompt_len = strlen(tempstr);
345
346 /*
347 * Remove newlines
348 */
349 for (i = 0; i < prompt_len; i++) {
350 if (tempstr[i] == '\n')
351 tempstr[i] = ' ';
352 }
353
354 if (prompt_len <= width - x * 2) { /* If prompt is short */
355 wmove(win, y, (width - prompt_len) / 2);
356 waddstr(win, tempstr);
357 } else {
358 cur_x = x;
359 cur_y = y;
360 newl = 1;
361 word = tempstr;
362 while (word && *word) {
363 sp = strchr(word, ' ');
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 = strchr(sp, ' '))
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 cur_x++;
384 if (sp && *sp == ' ') {
385 cur_x++; /* double space */
386 while (*++sp == ' ') ;
387 newl = 1;
388 } else
389 newl = 0;
390 word = sp;
391 }
392 }
393}
394
395/*
396 * Print a button
397 */
398void print_button(WINDOW * win, const char *label, int y, int x, int selected)
399{
400 int i, temp;
401
402 wmove(win, y, x);
403 wattrset(win, selected ? dlg.button_active.atr
404 : dlg.button_inactive.atr);
405 waddstr(win, "<");
406 temp = strspn(label, " ");
407 label += temp;
408 wattrset(win, selected ? dlg.button_label_active.atr
409 : dlg.button_label_inactive.atr);
410 for (i = 0; i < temp; i++)
411 waddch(win, ' ');
412 wattrset(win, selected ? dlg.button_key_active.atr
413 : dlg.button_key_inactive.atr);
414 waddch(win, label[0]);
415 wattrset(win, selected ? dlg.button_label_active.atr
416 : dlg.button_label_inactive.atr);
417 waddstr(win, (char *)label + 1);
418 wattrset(win, selected ? dlg.button_active.atr
419 : dlg.button_inactive.atr);
420 waddstr(win, ">");
421 wmove(win, y, x + temp + 1);
422}
423
424/*
425 * Draw a rectangular box with line drawing characters
426 */
427void
428draw_box(WINDOW * win, int y, int x, int height, int width,
429 chtype box, chtype border)
430{
431 int i, j;
432
433 wattrset(win, 0);
434 for (i = 0; i < height; i++) {
435 wmove(win, y + i, x);
436 for (j = 0; j < width; j++)
437 if (!i && !j)
438 waddch(win, border | ACS_ULCORNER);
439 else if (i == height - 1 && !j)
440 waddch(win, border | ACS_LLCORNER);
441 else if (!i && j == width - 1)
442 waddch(win, box | ACS_URCORNER);
443 else if (i == height - 1 && j == width - 1)
444 waddch(win, box | ACS_LRCORNER);
445 else if (!i)
446 waddch(win, border | ACS_HLINE);
447 else if (i == height - 1)
448 waddch(win, box | ACS_HLINE);
449 else if (!j)
450 waddch(win, border | ACS_VLINE);
451 else if (j == width - 1)
452 waddch(win, box | ACS_VLINE);
453 else
454 waddch(win, box | ' ');
455 }
456}
457
458/*
459 * Draw shadows along the right and bottom edge to give a more 3D look
460 * to the boxes
461 */
462void draw_shadow(WINDOW * win, int y, int x, int height, int width)
463{
464 int i;
465
466 if (has_colors()) { /* Whether terminal supports color? */
467 wattrset(win, dlg.shadow.atr);
468 wmove(win, y + height, x + 2);
469 for (i = 0; i < width; i++)
470 waddch(win, winch(win) & A_CHARTEXT);
471 for (i = y + 1; i < y + height + 1; i++) {
472 wmove(win, i, x + width);
473 waddch(win, winch(win) & A_CHARTEXT);
474 waddch(win, winch(win) & A_CHARTEXT);
475 }
476 wnoutrefresh(win);
477 }
478}
479
480/*
481 * Return the position of the first alphabetic character in a string.
482 */
483int first_alpha(const char *string, const char *exempt)
484{
485 int i, in_paren = 0, c;
486
487 for (i = 0; i < strlen(string); i++) {
488 c = tolower(string[i]);
489
490 if (strchr("<[(", c))
491 ++in_paren;
492 if (strchr(">])", c) && in_paren > 0)
493 --in_paren;
494
495 if ((!in_paren) && isalpha(c) && strchr(exempt, c) == 0)
496 return i;
497 }
498
499 return 0;
500}
501
502/*
503 * ncurses uses ESC to detect escaped char sequences. This resutl in
504 * a small timeout before ESC is actually delivered to the application.
505 * lxdialog suggest <ESC> <ESC> which is correctly translated to two
506 * times esc. But then we need to ignore the second esc to avoid stepping
507 * out one menu too much. Filter away all escaped key sequences since
508 * keypad(FALSE) turn off ncurses support for escape sequences - and thats
509 * needed to make notimeout() do as expected.
510 */
511int on_key_esc(WINDOW *win)
512{
513 int key;
514 int key2;
515 int key3;
516
517 nodelay(win, TRUE);
518 keypad(win, FALSE);
519 key = wgetch(win);
520 key2 = wgetch(win);
521 do {
522 key3 = wgetch(win);
523 } while (key3 != ERR);
524 nodelay(win, FALSE);
525 keypad(win, TRUE);
526 if (key == KEY_ESC && key2 == ERR)
527 return KEY_ESC;
528 else if (key != ERR && key != KEY_ESC && key2 == ERR)
529 ungetch(key);
530
531 return -1;
532}
533
534/* redraw screen in new size */
535int on_key_resize(void)
536{
537 dialog_clear();
538 return KEY_RESIZE;
539}
540
541struct dialog_list *item_cur;
542struct dialog_list item_nil;
543struct dialog_list *item_head;
544
545void item_reset(void)
546{
547 struct dialog_list *p, *next;
548
549 for (p = item_head; p; p = next) {
550 next = p->next;
551 free(p);
552 }
553 item_head = NULL;
554 item_cur = &item_nil;
555}
556
557void item_make(const char *fmt, ...)
558{
559 va_list ap;
560 struct dialog_list *p = malloc(sizeof(*p));
561
562 if (item_head)
563 item_cur->next = p;
564 else
565 item_head = p;
566 item_cur = p;
567 memset(p, 0, sizeof(*p));
568
569 va_start(ap, fmt);
570 vsnprintf(item_cur->node.str, sizeof(item_cur->node.str), fmt, ap);
571 va_end(ap);
572}
573
574void item_add_str(const char *fmt, ...)
575{
576 va_list ap;
577 size_t avail;
578
579 avail = sizeof(item_cur->node.str) - strlen(item_cur->node.str);
580
581 va_start(ap, fmt);
582 vsnprintf(item_cur->node.str + strlen(item_cur->node.str),
583 avail, fmt, ap);
584 item_cur->node.str[sizeof(item_cur->node.str) - 1] = '\0';
585 va_end(ap);
586}
587
588void item_set_tag(char tag)
589{
590 item_cur->node.tag = tag;
591}
592void item_set_data(void *ptr)
593{
594 item_cur->node.data = ptr;
595}
596
597void item_set_selected(int val)
598{
599 item_cur->node.selected = val;
600}
601
602int item_activate_selected(void)
603{
604 item_foreach()
605 if (item_is_selected())
606 return 1;
607 return 0;
608}
609
610void *item_data(void)
611{
612 return item_cur->node.data;
613}
614
615char item_tag(void)
616{
617 return item_cur->node.tag;
618}
619
620int item_count(void)
621{
622 int n = 0;
623 struct dialog_list *p;
624
625 for (p = item_head; p; p = p->next)
626 n++;
627 return n;
628}
629
630void item_set(int n)
631{
632 int i = 0;
633 item_foreach()
634 if (i++ == n)
635 return;
636}
637
638int item_n(void)
639{
640 int n = 0;
641 struct dialog_list *p;
642
643 for (p = item_head; p; p = p->next) {
644 if (p == item_cur)
645 return n;
646 n++;
647 }
648 return 0;
649}
650
651const char *item_str(void)
652{
653 return item_cur->node.str;
654}
655
656int item_is_selected(void)
657{
658 return (item_cur->node.selected != 0);
659}
660
661int item_is_tag(char tag)
662{
663 return (item_cur->node.tag == tag);
664}