scripts/kconfig/lxdialog/util.c

   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
  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
  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
  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
 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  */
 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
 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
 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  */
 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  */
 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
 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  */
 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
 328 void set_dialog_backtitle(const char *backtitle)
 329 {
 330         dlg.backtitle = backtitle;
 331 }
 332
 333 void set_dialog_subtitles(struct subtitle_list *subtitles)
 334 {
 335         dlg.subtitles = subtitles;
 336 }
 337
 338 /*
 339  * End using dialog functions.
 340  */
 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  **/
 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 propperly processed.  We start on a new line
 367  * if there is no room for at least 4 nonblanks following a double-space.
 368  */
 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  */
 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
 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  */
 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  */
 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 thats
 545  * needed to make notimeout() do as expected.
 546  */
 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 */
 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
 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
 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
 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
 624 void item_set_tag(char tag)
 625 {
 626         item_cur->node.tag = tag;
 627 }
 628 void item_set_data(void *ptr)
 629 {
 630         item_cur->node.data = ptr;
 631 }
 632
 633 void item_set_selected(int val)
 634 {
 635         item_cur->node.selected = val;
 636 }
 637
 638 int item_activate_selected(void)
 639 {
 640         item_foreach()
 641                 if (item_is_selected())
 642                         return 1;
 643         return 0;
 644 }
 645
 646 void *item_data(void)
 647 {
 648         return item_cur->node.data;
 649 }
 650
 651 char item_tag(void)
 652 {
 653         return item_cur->node.tag;
 654 }
 655
 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
 666 void item_set(int n)
 667 {
 668         int i = 0;
 669         item_foreach()
 670                 if (i++ == n)
 671                         return;
 672 }
 673
 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
 687 const char *item_str(void)
 688 {
 689         return item_cur->node.str;
 690 }
 691
 692 int item_is_selected(void)
 693 {
 694         return (item_cur->node.selected != 0);
 695 }
 696
 697 int item_is_tag(char tag)
 698 {
 699         return (item_cur->node.tag == tag);
 700 }