1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  *  util.c
4  *
5  *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
6  *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
7  */
8 
9 #include <stdarg.h>
10 
11 #include "dialog.h"
12 
13 /* Needed in signal handler in mconf.c */
14 int saved_x, saved_y;
15 
16 struct dialog_info dlg;
17 
set_mono_theme(void)18 static void set_mono_theme(void)
19 {
20 	dlg.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.inputbox_border.atr = A_NORMAL;
33 	dlg.searchbox.atr = A_NORMAL;
34 	dlg.searchbox_title.atr = A_BOLD;
35 	dlg.searchbox_border.atr = A_NORMAL;
36 	dlg.position_indicator.atr = A_BOLD;
37 	dlg.menubox.atr = A_NORMAL;
38 	dlg.menubox_border.atr = A_NORMAL;
39 	dlg.item.atr = A_NORMAL;
40 	dlg.item_selected.atr = A_REVERSE;
41 	dlg.tag.atr = A_BOLD;
42 	dlg.tag_selected.atr = A_REVERSE;
43 	dlg.tag_key.atr = A_BOLD;
44 	dlg.tag_key_selected.atr = A_REVERSE;
45 	dlg.check.atr = A_BOLD;
46 	dlg.check_selected.atr = A_REVERSE;
47 	dlg.uarrow.atr = A_BOLD;
48 	dlg.darrow.atr = A_BOLD;
49 }
50 
51 #define DLG_COLOR(dialog, f, b, h) \
52 do {                               \
53 	dlg.dialog.fg = (f);       \
54 	dlg.dialog.bg = (b);       \
55 	dlg.dialog.hl = (h);       \
56 } while (0)
57 
set_classic_theme(void)58 static void set_classic_theme(void)
59 {
60 	DLG_COLOR(screen,                COLOR_CYAN,   COLOR_BLUE,   true);
61 	DLG_COLOR(shadow,                COLOR_BLACK,  COLOR_BLACK,  true);
62 	DLG_COLOR(dialog,                COLOR_BLACK,  COLOR_WHITE,  false);
63 	DLG_COLOR(title,                 COLOR_YELLOW, COLOR_WHITE,  true);
64 	DLG_COLOR(border,                COLOR_WHITE,  COLOR_WHITE,  true);
65 	DLG_COLOR(button_active,         COLOR_WHITE,  COLOR_BLUE,   true);
66 	DLG_COLOR(button_inactive,       COLOR_BLACK,  COLOR_WHITE,  false);
67 	DLG_COLOR(button_key_active,     COLOR_WHITE,  COLOR_BLUE,   true);
68 	DLG_COLOR(button_key_inactive,   COLOR_RED,    COLOR_WHITE,  false);
69 	DLG_COLOR(button_label_active,   COLOR_YELLOW, COLOR_BLUE,   true);
70 	DLG_COLOR(button_label_inactive, COLOR_BLACK,  COLOR_WHITE,  true);
71 	DLG_COLOR(inputbox,              COLOR_BLACK,  COLOR_WHITE,  false);
72 	DLG_COLOR(inputbox_border,       COLOR_BLACK,  COLOR_WHITE,  false);
73 	DLG_COLOR(searchbox,             COLOR_BLACK,  COLOR_WHITE,  false);
74 	DLG_COLOR(searchbox_title,       COLOR_YELLOW, COLOR_WHITE,  true);
75 	DLG_COLOR(searchbox_border,      COLOR_WHITE,  COLOR_WHITE,  true);
76 	DLG_COLOR(position_indicator,    COLOR_YELLOW, COLOR_WHITE,  true);
77 	DLG_COLOR(menubox,               COLOR_BLACK,  COLOR_WHITE,  false);
78 	DLG_COLOR(menubox_border,        COLOR_WHITE,  COLOR_WHITE,  true);
79 	DLG_COLOR(item,                  COLOR_BLACK,  COLOR_WHITE,  false);
80 	DLG_COLOR(item_selected,         COLOR_WHITE,  COLOR_BLUE,   true);
81 	DLG_COLOR(tag,                   COLOR_YELLOW, COLOR_WHITE,  true);
82 	DLG_COLOR(tag_selected,          COLOR_YELLOW, COLOR_BLUE,   true);
83 	DLG_COLOR(tag_key,               COLOR_YELLOW, COLOR_WHITE,  true);
84 	DLG_COLOR(tag_key_selected,      COLOR_YELLOW, COLOR_BLUE,   true);
85 	DLG_COLOR(check,                 COLOR_BLACK,  COLOR_WHITE,  false);
86 	DLG_COLOR(check_selected,        COLOR_WHITE,  COLOR_BLUE,   true);
87 	DLG_COLOR(uarrow,                COLOR_GREEN,  COLOR_WHITE,  true);
88 	DLG_COLOR(darrow,                COLOR_GREEN,  COLOR_WHITE,  true);
89 }
90 
set_blackbg_theme(void)91 static void set_blackbg_theme(void)
92 {
93 	DLG_COLOR(screen, COLOR_RED,   COLOR_BLACK, true);
94 	DLG_COLOR(shadow, COLOR_BLACK, COLOR_BLACK, false);
95 	DLG_COLOR(dialog, COLOR_WHITE, COLOR_BLACK, false);
96 	DLG_COLOR(title,  COLOR_RED,   COLOR_BLACK, false);
97 	DLG_COLOR(border, COLOR_BLACK, COLOR_BLACK, true);
98 
99 	DLG_COLOR(button_active,         COLOR_YELLOW, COLOR_RED,   false);
100 	DLG_COLOR(button_inactive,       COLOR_YELLOW, COLOR_BLACK, false);
101 	DLG_COLOR(button_key_active,     COLOR_YELLOW, COLOR_RED,   true);
102 	DLG_COLOR(button_key_inactive,   COLOR_RED,    COLOR_BLACK, false);
103 	DLG_COLOR(button_label_active,   COLOR_WHITE,  COLOR_RED,   false);
104 	DLG_COLOR(button_label_inactive, COLOR_BLACK,  COLOR_BLACK, true);
105 
106 	DLG_COLOR(inputbox,         COLOR_YELLOW, COLOR_BLACK, false);
107 	DLG_COLOR(inputbox_border,  COLOR_YELLOW, COLOR_BLACK, false);
108 
109 	DLG_COLOR(searchbox,        COLOR_YELLOW, COLOR_BLACK, false);
110 	DLG_COLOR(searchbox_title,  COLOR_YELLOW, COLOR_BLACK, true);
111 	DLG_COLOR(searchbox_border, COLOR_BLACK,  COLOR_BLACK, true);
112 
113 	DLG_COLOR(position_indicator, COLOR_RED, COLOR_BLACK,  false);
114 
115 	DLG_COLOR(menubox,          COLOR_YELLOW, COLOR_BLACK, false);
116 	DLG_COLOR(menubox_border,   COLOR_BLACK,  COLOR_BLACK, true);
117 
118 	DLG_COLOR(item,             COLOR_WHITE, COLOR_BLACK, false);
119 	DLG_COLOR(item_selected,    COLOR_WHITE, COLOR_RED,   false);
120 
121 	DLG_COLOR(tag,              COLOR_RED,    COLOR_BLACK, false);
122 	DLG_COLOR(tag_selected,     COLOR_YELLOW, COLOR_RED,   true);
123 	DLG_COLOR(tag_key,          COLOR_RED,    COLOR_BLACK, false);
124 	DLG_COLOR(tag_key_selected, COLOR_YELLOW, COLOR_RED,   true);
125 
126 	DLG_COLOR(check,            COLOR_YELLOW, COLOR_BLACK, false);
127 	DLG_COLOR(check_selected,   COLOR_YELLOW, COLOR_RED,   true);
128 
129 	DLG_COLOR(uarrow, COLOR_RED, COLOR_BLACK, false);
130 	DLG_COLOR(darrow, COLOR_RED, COLOR_BLACK, false);
131 }
132 
set_bluetitle_theme(void)133 static void set_bluetitle_theme(void)
134 {
135 	set_classic_theme();
136 	DLG_COLOR(title,               COLOR_BLUE,   COLOR_WHITE, true);
137 	DLG_COLOR(button_key_active,   COLOR_YELLOW, COLOR_BLUE,  true);
138 	DLG_COLOR(button_label_active, COLOR_WHITE,  COLOR_BLUE,  true);
139 	DLG_COLOR(searchbox_title,     COLOR_BLUE,   COLOR_WHITE, true);
140 	DLG_COLOR(position_indicator,  COLOR_BLUE,   COLOR_WHITE, true);
141 	DLG_COLOR(tag,                 COLOR_BLUE,   COLOR_WHITE, true);
142 	DLG_COLOR(tag_key,             COLOR_BLUE,   COLOR_WHITE, true);
143 
144 }
145 
146 /*
147  * Select color theme
148  */
set_theme(const char * theme)149 static int set_theme(const char *theme)
150 {
151 	int use_color = 1;
152 	if (!theme)
153 		set_bluetitle_theme();
154 	else if (strcmp(theme, "classic") == 0)
155 		set_classic_theme();
156 	else if (strcmp(theme, "bluetitle") == 0)
157 		set_bluetitle_theme();
158 	else if (strcmp(theme, "blackbg") == 0)
159 		set_blackbg_theme();
160 	else if (strcmp(theme, "mono") == 0)
161 		use_color = 0;
162 
163 	return use_color;
164 }
165 
init_one_color(struct dialog_color * color)166 static void init_one_color(struct dialog_color *color)
167 {
168 	static int pair = 0;
169 
170 	pair++;
171 	init_pair(pair, color->fg, color->bg);
172 	if (color->hl)
173 		color->atr = A_BOLD | COLOR_PAIR(pair);
174 	else
175 		color->atr = COLOR_PAIR(pair);
176 }
177 
init_dialog_colors(void)178 static void init_dialog_colors(void)
179 {
180 	init_one_color(&dlg.screen);
181 	init_one_color(&dlg.shadow);
182 	init_one_color(&dlg.dialog);
183 	init_one_color(&dlg.title);
184 	init_one_color(&dlg.border);
185 	init_one_color(&dlg.button_active);
186 	init_one_color(&dlg.button_inactive);
187 	init_one_color(&dlg.button_key_active);
188 	init_one_color(&dlg.button_key_inactive);
189 	init_one_color(&dlg.button_label_active);
190 	init_one_color(&dlg.button_label_inactive);
191 	init_one_color(&dlg.inputbox);
192 	init_one_color(&dlg.inputbox_border);
193 	init_one_color(&dlg.searchbox);
194 	init_one_color(&dlg.searchbox_title);
195 	init_one_color(&dlg.searchbox_border);
196 	init_one_color(&dlg.position_indicator);
197 	init_one_color(&dlg.menubox);
198 	init_one_color(&dlg.menubox_border);
199 	init_one_color(&dlg.item);
200 	init_one_color(&dlg.item_selected);
201 	init_one_color(&dlg.tag);
202 	init_one_color(&dlg.tag_selected);
203 	init_one_color(&dlg.tag_key);
204 	init_one_color(&dlg.tag_key_selected);
205 	init_one_color(&dlg.check);
206 	init_one_color(&dlg.check_selected);
207 	init_one_color(&dlg.uarrow);
208 	init_one_color(&dlg.darrow);
209 }
210 
211 /*
212  * Setup for color display
213  */
color_setup(const char * theme)214 static void color_setup(const char *theme)
215 {
216 	int use_color;
217 
218 	use_color = set_theme(theme);
219 	if (use_color && has_colors()) {
220 		start_color();
221 		init_dialog_colors();
222 	} else
223 		set_mono_theme();
224 }
225 
226 /*
227  * Set window to attribute 'attr'
228  */
attr_clear(WINDOW * win,int height,int width,chtype attr)229 void attr_clear(WINDOW * win, int height, int width, chtype attr)
230 {
231 	int i, j;
232 
233 	wattrset(win, attr);
234 	for (i = 0; i < height; i++) {
235 		wmove(win, i, 0);
236 		for (j = 0; j < width; j++)
237 			waddch(win, ' ');
238 	}
239 	touchwin(win);
240 }
241 
dialog_clear(void)242 void dialog_clear(void)
243 {
244 	int lines, columns;
245 
246 	lines = getmaxy(stdscr);
247 	columns = getmaxx(stdscr);
248 
249 	attr_clear(stdscr, lines, columns, dlg.screen.atr);
250 	/* Display background title if it exists ... - SLH */
251 	if (dlg.backtitle != NULL) {
252 		int i, len = 0, skip = 0;
253 		struct subtitle_list *pos;
254 
255 		wattrset(stdscr, dlg.screen.atr);
256 		mvwaddstr(stdscr, 0, 1, (char *)dlg.backtitle);
257 
258 		for (pos = dlg.subtitles; pos != NULL; pos = pos->next) {
259 			/* 3 is for the arrow and spaces */
260 			len += strlen(pos->text) + 3;
261 		}
262 
263 		wmove(stdscr, 1, 1);
264 		if (len > columns - 2) {
265 			const char *ellipsis = "[...] ";
266 			waddstr(stdscr, ellipsis);
267 			skip = len - (columns - 2 - strlen(ellipsis));
268 		}
269 
270 		for (pos = dlg.subtitles; pos != NULL; pos = pos->next) {
271 			if (skip == 0)
272 				waddch(stdscr, ACS_RARROW);
273 			else
274 				skip--;
275 
276 			if (skip == 0)
277 				waddch(stdscr, ' ');
278 			else
279 				skip--;
280 
281 			if (skip < strlen(pos->text)) {
282 				waddstr(stdscr, pos->text + skip);
283 				skip = 0;
284 			} else
285 				skip -= strlen(pos->text);
286 
287 			if (skip == 0)
288 				waddch(stdscr, ' ');
289 			else
290 				skip--;
291 		}
292 
293 		for (i = len + 1; i < columns - 1; i++)
294 			waddch(stdscr, ACS_HLINE);
295 	}
296 	wnoutrefresh(stdscr);
297 }
298 
299 /*
300  * Do some initialization for dialog
301  */
init_dialog(const char * backtitle)302 int init_dialog(const char *backtitle)
303 {
304 	int height, width;
305 
306 	initscr();		/* Init curses */
307 
308 	/* Get current cursor position for signal handler in mconf.c */
309 	getyx(stdscr, saved_y, saved_x);
310 
311 	getmaxyx(stdscr, height, width);
312 	if (height < WINDOW_HEIGTH_MIN || width < WINDOW_WIDTH_MIN) {
313 		endwin();
314 		return -ERRDISPLAYTOOSMALL;
315 	}
316 
317 	dlg.backtitle = backtitle;
318 	color_setup(getenv("MENUCONFIG_COLOR"));
319 
320 	keypad(stdscr, TRUE);
321 	cbreak();
322 	noecho();
323 	dialog_clear();
324 
325 	return 0;
326 }
327 
set_dialog_backtitle(const char * backtitle)328 void set_dialog_backtitle(const char *backtitle)
329 {
330 	dlg.backtitle = backtitle;
331 }
332 
set_dialog_subtitles(struct subtitle_list * subtitles)333 void set_dialog_subtitles(struct subtitle_list *subtitles)
334 {
335 	dlg.subtitles = subtitles;
336 }
337 
338 /*
339  * End using dialog functions.
340  */
end_dialog(int x,int y)341 void end_dialog(int x, int y)
342 {
343 	/* move cursor back to original position */
344 	move(y, x);
345 	refresh();
346 	endwin();
347 }
348 
349 /* Print the title of the dialog. Center the title and truncate
350  * tile if wider than dialog (- 2 chars).
351  **/
print_title(WINDOW * dialog,const char * title,int width)352 void print_title(WINDOW *dialog, const char *title, int width)
353 {
354 	if (title) {
355 		int tlen = MIN(width - 2, strlen(title));
356 		wattrset(dialog, dlg.title.atr);
357 		mvwaddch(dialog, 0, (width - tlen) / 2 - 1, ' ');
358 		mvwaddnstr(dialog, 0, (width - tlen)/2, title, tlen);
359 		waddch(dialog, ' ');
360 	}
361 }
362 
363 /*
364  * Print a string of text in a window, automatically wrap around to the
365  * next line if the string is too long to fit on one line. Newline
366  * characters '\n' are properly processed.  We start on a new line
367  * if there is no room for at least 4 nonblanks following a double-space.
368  */
print_autowrap(WINDOW * win,const char * prompt,int width,int y,int x)369 void print_autowrap(WINDOW * win, const char *prompt, int width, int y, int x)
370 {
371 	int newl, cur_x, cur_y;
372 	int prompt_len, room, wlen;
373 	char tempstr[MAX_LEN + 1], *word, *sp, *sp2, *newline_separator = 0;
374 
375 	strcpy(tempstr, prompt);
376 
377 	prompt_len = strlen(tempstr);
378 
379 	if (prompt_len <= width - x * 2) {	/* If prompt is short */
380 		wmove(win, y, (width - prompt_len) / 2);
381 		waddstr(win, tempstr);
382 	} else {
383 		cur_x = x;
384 		cur_y = y;
385 		newl = 1;
386 		word = tempstr;
387 		while (word && *word) {
388 			sp = strpbrk(word, "\n ");
389 			if (sp && *sp == '\n')
390 				newline_separator = sp;
391 
392 			if (sp)
393 				*sp++ = 0;
394 
395 			/* Wrap to next line if either the word does not fit,
396 			   or it is the first word of a new sentence, and it is
397 			   short, and the next word does not fit. */
398 			room = width - cur_x;
399 			wlen = strlen(word);
400 			if (wlen > room ||
401 			    (newl && wlen < 4 && sp
402 			     && wlen + 1 + strlen(sp) > room
403 			     && (!(sp2 = strpbrk(sp, "\n "))
404 				 || wlen + 1 + (sp2 - sp) > room))) {
405 				cur_y++;
406 				cur_x = x;
407 			}
408 			wmove(win, cur_y, cur_x);
409 			waddstr(win, word);
410 			getyx(win, cur_y, cur_x);
411 
412 			/* Move to the next line if the word separator was a newline */
413 			if (newline_separator) {
414 				cur_y++;
415 				cur_x = x;
416 				newline_separator = 0;
417 			} else
418 				cur_x++;
419 
420 			if (sp && *sp == ' ') {
421 				cur_x++;	/* double space */
422 				while (*++sp == ' ') ;
423 				newl = 1;
424 			} else
425 				newl = 0;
426 			word = sp;
427 		}
428 	}
429 }
430 
431 /*
432  * Print a button
433  */
print_button(WINDOW * win,const char * label,int y,int x,int selected)434 void print_button(WINDOW * win, const char *label, int y, int x, int selected)
435 {
436 	int i, temp;
437 
438 	wmove(win, y, x);
439 	wattrset(win, selected ? dlg.button_active.atr
440 		 : dlg.button_inactive.atr);
441 	waddstr(win, "<");
442 	temp = strspn(label, " ");
443 	label += temp;
444 	wattrset(win, selected ? dlg.button_label_active.atr
445 		 : dlg.button_label_inactive.atr);
446 	for (i = 0; i < temp; i++)
447 		waddch(win, ' ');
448 	wattrset(win, selected ? dlg.button_key_active.atr
449 		 : dlg.button_key_inactive.atr);
450 	waddch(win, label[0]);
451 	wattrset(win, selected ? dlg.button_label_active.atr
452 		 : dlg.button_label_inactive.atr);
453 	waddstr(win, (char *)label + 1);
454 	wattrset(win, selected ? dlg.button_active.atr
455 		 : dlg.button_inactive.atr);
456 	waddstr(win, ">");
457 	wmove(win, y, x + temp + 1);
458 }
459 
460 /*
461  * Draw a rectangular box with line drawing characters
462  */
463 void
draw_box(WINDOW * win,int y,int x,int height,int width,chtype box,chtype border)464 draw_box(WINDOW * win, int y, int x, int height, int width,
465 	 chtype box, chtype border)
466 {
467 	int i, j;
468 
469 	wattrset(win, 0);
470 	for (i = 0; i < height; i++) {
471 		wmove(win, y + i, x);
472 		for (j = 0; j < width; j++)
473 			if (!i && !j)
474 				waddch(win, border | ACS_ULCORNER);
475 			else if (i == height - 1 && !j)
476 				waddch(win, border | ACS_LLCORNER);
477 			else if (!i && j == width - 1)
478 				waddch(win, box | ACS_URCORNER);
479 			else if (i == height - 1 && j == width - 1)
480 				waddch(win, box | ACS_LRCORNER);
481 			else if (!i)
482 				waddch(win, border | ACS_HLINE);
483 			else if (i == height - 1)
484 				waddch(win, box | ACS_HLINE);
485 			else if (!j)
486 				waddch(win, border | ACS_VLINE);
487 			else if (j == width - 1)
488 				waddch(win, box | ACS_VLINE);
489 			else
490 				waddch(win, box | ' ');
491 	}
492 }
493 
494 /*
495  * Draw shadows along the right and bottom edge to give a more 3D look
496  * to the boxes
497  */
draw_shadow(WINDOW * win,int y,int x,int height,int width)498 void draw_shadow(WINDOW * win, int y, int x, int height, int width)
499 {
500 	int i;
501 
502 	if (has_colors()) {	/* Whether terminal supports color? */
503 		wattrset(win, dlg.shadow.atr);
504 		wmove(win, y + height, x + 2);
505 		for (i = 0; i < width; i++)
506 			waddch(win, winch(win) & A_CHARTEXT);
507 		for (i = y + 1; i < y + height + 1; i++) {
508 			wmove(win, i, x + width);
509 			waddch(win, winch(win) & A_CHARTEXT);
510 			waddch(win, winch(win) & A_CHARTEXT);
511 		}
512 		wnoutrefresh(win);
513 	}
514 }
515 
516 /*
517  *  Return the position of the first alphabetic character in a string.
518  */
first_alpha(const char * string,const char * exempt)519 int first_alpha(const char *string, const char *exempt)
520 {
521 	int i, in_paren = 0, c;
522 
523 	for (i = 0; i < strlen(string); i++) {
524 		c = tolower(string[i]);
525 
526 		if (strchr("<[(", c))
527 			++in_paren;
528 		if (strchr(">])", c) && in_paren > 0)
529 			--in_paren;
530 
531 		if ((!in_paren) && isalpha(c) && strchr(exempt, c) == 0)
532 			return i;
533 	}
534 
535 	return 0;
536 }
537 
538 /*
539  * ncurses uses ESC to detect escaped char sequences. This resutl in
540  * a small timeout before ESC is actually delivered to the application.
541  * lxdialog suggest <ESC> <ESC> which is correctly translated to two
542  * times esc. But then we need to ignore the second esc to avoid stepping
543  * out one menu too much. Filter away all escaped key sequences since
544  * keypad(FALSE) turn off ncurses support for escape sequences - and that's
545  * needed to make notimeout() do as expected.
546  */
on_key_esc(WINDOW * win)547 int on_key_esc(WINDOW *win)
548 {
549 	int key;
550 	int key2;
551 	int key3;
552 
553 	nodelay(win, TRUE);
554 	keypad(win, FALSE);
555 	key = wgetch(win);
556 	key2 = wgetch(win);
557 	do {
558 		key3 = wgetch(win);
559 	} while (key3 != ERR);
560 	nodelay(win, FALSE);
561 	keypad(win, TRUE);
562 	if (key == KEY_ESC && key2 == ERR)
563 		return KEY_ESC;
564 	else if (key != ERR && key != KEY_ESC && key2 == ERR)
565 		ungetch(key);
566 
567 	return -1;
568 }
569 
570 /* redraw screen in new size */
on_key_resize(void)571 int on_key_resize(void)
572 {
573 	dialog_clear();
574 	return KEY_RESIZE;
575 }
576 
577 struct dialog_list *item_cur;
578 struct dialog_list item_nil;
579 struct dialog_list *item_head;
580 
item_reset(void)581 void item_reset(void)
582 {
583 	struct dialog_list *p, *next;
584 
585 	for (p = item_head; p; p = next) {
586 		next = p->next;
587 		free(p);
588 	}
589 	item_head = NULL;
590 	item_cur = &item_nil;
591 }
592 
item_make(const char * fmt,...)593 void item_make(const char *fmt, ...)
594 {
595 	va_list ap;
596 	struct dialog_list *p = malloc(sizeof(*p));
597 
598 	if (item_head)
599 		item_cur->next = p;
600 	else
601 		item_head = p;
602 	item_cur = p;
603 	memset(p, 0, sizeof(*p));
604 
605 	va_start(ap, fmt);
606 	vsnprintf(item_cur->node.str, sizeof(item_cur->node.str), fmt, ap);
607 	va_end(ap);
608 }
609 
item_add_str(const char * fmt,...)610 void item_add_str(const char *fmt, ...)
611 {
612 	va_list ap;
613 	size_t avail;
614 
615 	avail = sizeof(item_cur->node.str) - strlen(item_cur->node.str);
616 
617 	va_start(ap, fmt);
618 	vsnprintf(item_cur->node.str + strlen(item_cur->node.str),
619 		  avail, fmt, ap);
620 	item_cur->node.str[sizeof(item_cur->node.str) - 1] = '\0';
621 	va_end(ap);
622 }
623 
item_set_tag(char tag)624 void item_set_tag(char tag)
625 {
626 	item_cur->node.tag = tag;
627 }
item_set_data(void * ptr)628 void item_set_data(void *ptr)
629 {
630 	item_cur->node.data = ptr;
631 }
632 
item_set_selected(int val)633 void item_set_selected(int val)
634 {
635 	item_cur->node.selected = val;
636 }
637 
item_activate_selected(void)638 int item_activate_selected(void)
639 {
640 	item_foreach()
641 		if (item_is_selected())
642 			return 1;
643 	return 0;
644 }
645 
item_data(void)646 void *item_data(void)
647 {
648 	return item_cur->node.data;
649 }
650 
item_tag(void)651 char item_tag(void)
652 {
653 	return item_cur->node.tag;
654 }
655 
item_count(void)656 int item_count(void)
657 {
658 	int n = 0;
659 	struct dialog_list *p;
660 
661 	for (p = item_head; p; p = p->next)
662 		n++;
663 	return n;
664 }
665 
item_set(int n)666 void item_set(int n)
667 {
668 	int i = 0;
669 	item_foreach()
670 		if (i++ == n)
671 			return;
672 }
673 
item_n(void)674 int item_n(void)
675 {
676 	int n = 0;
677 	struct dialog_list *p;
678 
679 	for (p = item_head; p; p = p->next) {
680 		if (p == item_cur)
681 			return n;
682 		n++;
683 	}
684 	return 0;
685 }
686 
item_str(void)687 const char *item_str(void)
688 {
689 	return item_cur->node.str;
690 }
691 
item_is_selected(void)692 int item_is_selected(void)
693 {
694 	return (item_cur->node.selected != 0);
695 }
696 
item_is_tag(char tag)697 int item_is_tag(char tag)
698 {
699 	return (item_cur->node.tag == tag);
700 }
701