contrib/dialog/formbox.c

   1 /*
   2  *  $Id: formbox.c,v 1.87 2013/09/02 17:02:05 tom Exp $
   3  *
   4  *  formbox.c -- implements the form (i.e, some pairs label/editbox)
   5  *
   6  *  Copyright 2003-2012,2013    Thomas E. Dickey
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU Lesser General Public License, version 2.1
  10  *  as published by the Free Software Foundation.
  11  *
  12  *  This program is distributed in the hope that it will be useful, but
  13  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  *  Lesser General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU Lesser General Public
  18  *  License along with this program; if not, write to
  19  *      Free Software Foundation, Inc.
  20  *      51 Franklin St., Fifth Floor
  21  *      Boston, MA 02110, USA.
  22  *
  23  *  This is adapted from source contributed by
  24  *      Valery Reznic (valery_reznic@users.sourceforge.net)
  25  */
  26
  27 #include <dialog.h>
  28 #include <dlg_keys.h>
  29
  30 #define LLEN(n) ((n) * FORMBOX_TAGS)
  31
  32 #define ItemName(i)     items[LLEN(i) + 0]
  33 #define ItemNameY(i)    items[LLEN(i) + 1]
  34 #define ItemNameX(i)    items[LLEN(i) + 2]
  35 #define ItemText(i)     items[LLEN(i) + 3]
  36 #define ItemTextY(i)    items[LLEN(i) + 4]
  37 #define ItemTextX(i)    items[LLEN(i) + 5]
  38 #define ItemTextFLen(i) items[LLEN(i) + 6]
  39 #define ItemTextILen(i) items[LLEN(i) + 7]
  40 #define ItemHelp(i)     (dialog_vars.item_help ? items[LLEN(i) + 8] : dlg_strempty())
  41
  42 static bool
  43 is_readonly(DIALOG_FORMITEM * item)
  44 {
  45     return ((item->type & 2) != 0) || (item->text_flen <= 0);
  46 }
  47
  48 static bool
  49 is_hidden(DIALOG_FORMITEM * item)
  50 {
  51     return ((item->type & 1) != 0);
  52 }
  53
  54 static bool
  55 in_window(WINDOW *win, int scrollamt, int y)
  56 {
  57     return (y >= scrollamt && y - scrollamt < getmaxy(win));
  58 }
  59
  60 static bool
  61 ok_move(WINDOW *win, int scrollamt, int y, int x)
  62 {
  63     return in_window(win, scrollamt, y)
  64         && (wmove(win, y - scrollamt, x) != ERR);
  65 }
  66
  67 static void
  68 move_past(WINDOW *win, int y, int x)
  69 {
  70     if (wmove(win, y, x) == ERR)
  71         wmove(win, y, getmaxx(win) - 1);
  72 }
  73
  74 /*
  75  * Print form item
  76  */
  77 static int
  78 print_item(WINDOW *win, DIALOG_FORMITEM * item, int scrollamt, bool choice)
  79 {
  80     int count = 0;
  81     int len;
  82
  83     if (ok_move(win, scrollamt, item->name_y, item->name_x)) {
  84         len = item->name_len;
  85         len = MIN(len, getmaxx(win) - item->name_x);
  86         if (len > 0) {
  87             dlg_show_string(win,
  88                             item->name,
  89                             0,
  90                             menubox_attr,
  91                             item->name_y - scrollamt,
  92                             item->name_x,
  93                             len,
  94                             FALSE,
  95                             FALSE);
  96             move_past(win, item->name_y - scrollamt, item->name_x + len);
  97             count = 1;
  98         }
  99     }
 100     if (item->text_len && ok_move(win, scrollamt, item->text_y, item->text_x)) {
 101         chtype this_item_attribute;
 102
 103         len = item->text_len;
 104         len = MIN(len, getmaxx(win) - item->text_x);
 105
 106         if (!is_readonly(item)) {
 107             this_item_attribute = choice
 108                 ? form_active_text_attr
 109                 : form_text_attr;
 110         } else {
 111             this_item_attribute = form_item_readonly_attr;
 112         }
 113
 114         if (len > 0) {
 115             dlg_show_string(win,
 116                             item->text,
 117                             0,
 118                             this_item_attribute,
 119                             item->text_y - scrollamt,
 120                             item->text_x,
 121                             len,
 122                             is_hidden(item),
 123                             FALSE);
 124             move_past(win, item->text_y - scrollamt, item->text_x + len);
 125             count = 1;
 126         }
 127     }
 128     return count;
 129 }
 130
 131 /*
 132  * Print the entire form.
 133  */
 134 static void
 135 print_form(WINDOW *win, DIALOG_FORMITEM * item, int total, int scrollamt, int choice)
 136 {
 137     int n;
 138     int count = 0;
 139
 140     for (n = 0; n < total; ++n) {
 141         count += print_item(win, item + n, scrollamt, n == choice);
 142     }
 143     if (count) {
 144         wbkgdset(win, menubox_attr | ' ');
 145         wclrtobot(win);
 146         (void) wnoutrefresh(win);
 147     }
 148 }
 149
 150 static int
 151 set_choice(DIALOG_FORMITEM item[], int choice, int item_no, bool * noneditable)
 152 {
 153     int result = -1;
 154     int i;
 155
 156     *noneditable = FALSE;
 157     if (!is_readonly(&item[choice])) {
 158         result = choice;
 159     } else {
 160         for (i = 0; i < item_no; i++) {
 161             if (!is_readonly(&(item[i]))) {
 162                 result = i;
 163                 break;
 164             }
 165         }
 166         if (result < 0) {
 167             *noneditable = TRUE;
 168             result = 0;
 169         }
 170     }
 171     return result;
 172 }
 173
 174 /*
 175  * Find the last y-value in the form.
 176  */
 177 static int
 178 form_limit(DIALOG_FORMITEM item[])
 179 {
 180     int n;
 181     int limit = 0;
 182     for (n = 0; item[n].name != 0; ++n) {
 183         if (limit < item[n].name_y)
 184             limit = item[n].name_y;
 185         if (limit < item[n].text_y)
 186             limit = item[n].text_y;
 187     }
 188     return limit;
 189 }
 190
 191 static int
 192 is_first_field(DIALOG_FORMITEM item[], int choice)
 193 {
 194     int count = 0;
 195     while (choice >= 0) {
 196         if (item[choice].text_flen > 0) {
 197             ++count;
 198         }
 199         --choice;
 200     }
 201
 202     return (count == 1);
 203 }
 204
 205 static int
 206 is_last_field(DIALOG_FORMITEM item[], int choice, int item_no)
 207 {
 208     int count = 0;
 209     while (choice < item_no) {
 210         if (item[choice].text_flen > 0) {
 211             ++count;
 212         }
 213         ++choice;
 214     }
 215
 216     return (count == 1);
 217 }
 218
 219 /*
 220  * Tab to the next field.
 221  */
 222 static bool
 223 tab_next(WINDOW *win,
 224          DIALOG_FORMITEM item[],
 225          int item_no,
 226          int stepsize,
 227          int *choice,
 228          int *scrollamt)
 229 {
 230     int old_choice = *choice;
 231     int old_scroll = *scrollamt;
 232     bool wrapped = FALSE;
 233
 234     do {
 235         do {
 236             *choice += stepsize;
 237             if (*choice < 0) {
 238                 *choice = item_no - 1;
 239                 wrapped = TRUE;
 240             } else if (*choice >= item_no) {
 241                 *choice = 0;
 242                 wrapped = TRUE;
 243             }
 244         } while ((*choice != old_choice) && is_readonly(&(item[*choice])));
 245
 246         if (item[*choice].text_flen > 0) {
 247             int lo = MIN(item[*choice].name_y, item[*choice].text_y);
 248             int hi = MAX(item[*choice].name_y, item[*choice].text_y);
 249
 250             if (old_choice == *choice)
 251                 break;
 252             print_item(win, item + old_choice, *scrollamt, FALSE);
 253
 254             if (*scrollamt < lo + 1 - getmaxy(win))
 255                 *scrollamt = lo + 1 - getmaxy(win);
 256             if (*scrollamt > hi)
 257                 *scrollamt = hi;
 258             /*
 259              * If we have to scroll to show a wrap-around, it does get
 260              * confusing.  Just give up rather than scroll.  Tab'ing to the
 261              * next field in a multi-column form is a different matter.  Scroll
 262              * for that.
 263              */
 264             if (*scrollamt != old_scroll) {
 265                 if (wrapped) {
 266                     beep();
 267                     *scrollamt = old_scroll;
 268                     *choice = old_choice;
 269                 } else {
 270                     scrollok(win, TRUE);
 271                     wscrl(win, *scrollamt - old_scroll);
 272                     scrollok(win, FALSE);
 273                 }
 274             }
 275             break;
 276         }
 277     } while (*choice != old_choice);
 278
 279     return (old_choice != *choice) || (old_scroll != *scrollamt);
 280 }
 281
 282 /*
 283  * Scroll to the next page, putting the choice at the first editable field
 284  * in that page.  Note that fields are not necessarily in top-to-bottom order,
 285  * nor is there necessarily a field on each row of the window.
 286  */
 287 static bool
 288 scroll_next(WINDOW *win, DIALOG_FORMITEM item[], int stepsize, int *choice, int *scrollamt)
 289 {
 290     bool result = TRUE;
 291     int old_choice = *choice;
 292     int old_scroll = *scrollamt;
 293     int old_row = MIN(item[old_choice].text_y, item[old_choice].name_y);
 294     int target = old_scroll + stepsize;
 295     int n;
 296
 297     if (stepsize < 0) {
 298         if (old_row != old_scroll)
 299             target = old_scroll;
 300         else
 301             target = old_scroll + stepsize;
 302         if (target < 0) {
 303             result = FALSE;
 304         }
 305     } else {
 306         if (target > form_limit(item)) {
 307             result = FALSE;
 308         }
 309     }
 310
 311     if (result) {
 312         for (n = 0; item[n].name != 0; ++n) {
 313             if (item[n].text_flen > 0) {
 314                 int new_row = MIN(item[n].text_y, item[n].name_y);
 315                 if (abs(new_row - target) < abs(old_row - target)) {
 316                     old_row = new_row;
 317                     *choice = n;
 318                 }
 319             }
 320         }
 321
 322         if (old_choice != *choice)
 323             print_item(win, item + old_choice, *scrollamt, FALSE);
 324
 325         *scrollamt = *choice;
 326         if (*scrollamt != old_scroll) {
 327             scrollok(win, TRUE);
 328             wscrl(win, *scrollamt - old_scroll);
 329             scrollok(win, FALSE);
 330         }
 331         result = (old_choice != *choice) || (old_scroll != *scrollamt);
 332     }
 333     if (!result)
 334         beep();
 335     return result;
 336 }
 337
 338 /*
 339  * Do a sanity check on the field length, and return the "right" value.
 340  */
 341 static int
 342 real_length(DIALOG_FORMITEM * item)
 343 {
 344     return (item->text_flen > 0
 345             ? item->text_flen
 346             : (item->text_flen < 0
 347                ? -item->text_flen
 348                : item->text_len));
 349 }
 350
 351 /*
 352  * Compute the form size, setup field buffers.
 353  */
 354 static void
 355 make_FORM_ELTs(DIALOG_FORMITEM * item,
 356                int item_no,
 357                int *min_height,
 358                int *min_width)
 359 {
 360     int i;
 361     int min_w = 0;
 362     int min_h = 0;
 363
 364     for (i = 0; i < item_no; ++i) {
 365         int real_len = real_length(item + i);
 366
 367         /*
 368          * Special value '0' for text_flen: no input allowed
 369          * Special value '0' for text_ilen: 'be the same as text_flen'
 370          */
 371         if (item[i].text_ilen == 0)
 372             item[i].text_ilen = real_len;
 373
 374         min_h = MAX(min_h, item[i].name_y + 1);
 375         min_h = MAX(min_h, item[i].text_y + 1);
 376         min_w = MAX(min_w, item[i].name_x + 1 + item[i].name_len);
 377         min_w = MAX(min_w, item[i].text_x + 1 + real_len);
 378
 379         item[i].text_len = real_length(item + i);
 380
 381         /*
 382          * We do not know the actual length of .text, so we allocate it here
 383          * to ensure it is big enough.
 384          */
 385         if (item[i].text_flen > 0) {
 386             int max_len = dlg_max_input(MAX(item[i].text_ilen + 1, MAX_LEN));
 387             char *old_text = item[i].text;
 388
 389             item[i].text = dlg_malloc(char, (size_t) max_len + 1);
 390             assert_ptr(item[i].text, "make_FORM_ELTs");
 391
 392             sprintf(item[i].text, "%.*s", item[i].text_ilen, old_text);
 393
 394             if (item[i].text_free) {
 395                 item[i].text_free = FALSE;
 396                 free(old_text);
 397             }
 398             item[i].text_free = TRUE;
 399         }
 400     }
 401
 402     *min_height = min_h;
 403     *min_width = min_w;
 404 }
 405
 406 int
 407 dlg_default_formitem(DIALOG_FORMITEM * items)
 408 {
 409     int result = 0;
 410
 411     if (dialog_vars.default_item != 0) {
 412         int count = 0;
 413         while (items->name != 0) {
 414             if (!strcmp(dialog_vars.default_item, items->name)) {
 415                 result = count;
 416                 break;
 417             }
 418             ++items;
 419             count++;
 420         }
 421     }
 422     return result;
 423 }
 424
 425 #define sTEXT -1
 426
 427 static int
 428 next_valid_buttonindex(int state, int extra, bool non_editable)
 429 {
 430     state = dlg_next_ok_buttonindex(state, extra);
 431     while (non_editable && state == sTEXT)
 432         state = dlg_next_ok_buttonindex(state, sTEXT);
 433     return state;
 434 }
 435
 436 static int
 437 prev_valid_buttonindex(int state, int extra, bool non_editable)
 438 {
 439     state = dlg_prev_ok_buttonindex(state, extra);
 440     while (non_editable && state == sTEXT)
 441         state = dlg_prev_ok_buttonindex(state, sTEXT);
 442     return state;
 443 }
 444
 445 #define NAVIGATE_BINDINGS \
 446         DLG_KEYS_DATA( DLGK_FIELD_NEXT, TAB ), \
 447         DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_BTAB ), \
 448         DLG_KEYS_DATA( DLGK_ITEM_NEXT,  CHR_NEXT ), \
 449         DLG_KEYS_DATA( DLGK_ITEM_NEXT,  KEY_DOWN ), \
 450         DLG_KEYS_DATA( DLGK_ITEM_NEXT,  KEY_NEXT ), \
 451         DLG_KEYS_DATA( DLGK_ITEM_PREV,  CHR_PREVIOUS ), \
 452         DLG_KEYS_DATA( DLGK_ITEM_PREV,  KEY_PREVIOUS ), \
 453         DLG_KEYS_DATA( DLGK_ITEM_PREV,  KEY_UP ), \
 454         DLG_KEYS_DATA( DLGK_PAGE_NEXT,  KEY_NPAGE ), \
 455         DLG_KEYS_DATA( DLGK_PAGE_PREV,  KEY_PPAGE )
 456 /*
 457  * Display a form for entering a number of fields
 458  */
 459 int
 460 dlg_form(const char *title,
 461          const char *cprompt,
 462          int height,
 463          int width,
 464          int form_height,
 465          int item_no,
 466          DIALOG_FORMITEM * items,
 467          int *current_item)
 468 {
 469     /* *INDENT-OFF* */
 470     static DLG_KEYS_BINDING binding[] = {
 471         HELPKEY_BINDINGS,
 472         ENTERKEY_BINDINGS,
 473         NAVIGATE_BINDINGS,
 474         END_KEYS_BINDING
 475     };
 476     static DLG_KEYS_BINDING binding2[] = {
 477         INPUTSTR_BINDINGS,
 478         HELPKEY_BINDINGS,
 479         ENTERKEY_BINDINGS,
 480         NAVIGATE_BINDINGS,
 481         END_KEYS_BINDING
 482     };
 483     /* *INDENT-ON* */
 484
 485 #ifdef KEY_RESIZE
 486     int old_height = height;
 487     int old_width = width;
 488 #endif
 489
 490     int form_width;
 491     int first = TRUE;
 492     int first_trace = TRUE;
 493     int chr_offset = 0;
 494     int state = dialog_vars.default_button >= 0 ? dlg_default_button() : sTEXT;
 495     int x, y, cur_x, cur_y, box_x, box_y;
 496     int code;
 497     int key = 0;
 498     int fkey;
 499     int choice = dlg_default_formitem(items);
 500     int new_choice, new_scroll;
 501     int scrollamt = 0;
 502     int result = DLG_EXIT_UNKNOWN;
 503     int min_width = 0, min_height = 0;
 504     bool was_autosize = (height == 0 || width == 0);
 505     bool show_buttons = FALSE;
 506     bool scroll_changed = FALSE;
 507     bool field_changed = FALSE;
 508     bool non_editable = FALSE;
 509     WINDOW *dialog, *form;
 510     char *prompt = dlg_strclone(cprompt);
 511     const char **buttons = dlg_ok_labels();
 512     DIALOG_FORMITEM *current;
 513
 514     make_FORM_ELTs(items, item_no, &min_height, &min_width);
 515     dlg_button_layout(buttons, &min_width);
 516     dlg_does_output();
 517     dlg_tab_correct_str(prompt);
 518
 519 #ifdef KEY_RESIZE
 520   retry:
 521 #endif
 522
 523     dlg_auto_size(title, prompt, &height, &width,
 524                   1 + 3 * MARGIN,
 525                   MAX(26, 2 + min_width));
 526
 527     if (form_height == 0)
 528         form_height = min_height;
 529
 530     if (was_autosize) {
 531         form_height = MIN(SLINES - height, form_height);
 532         height += form_height;
 533     } else {
 534         int thigh = 0;
 535         int twide = 0;
 536         dlg_auto_size(title, prompt, &thigh, &twide, 0, width);
 537         thigh = SLINES - (height - (thigh + 1 + 3 * MARGIN));
 538         form_height = MIN(thigh, form_height);
 539     }
 540
 541     dlg_print_size(height, width);
 542     dlg_ctl_size(height, width);
 543
 544     x = dlg_box_x_ordinate(width);
 545     y = dlg_box_y_ordinate(height);
 546
 547     dialog = dlg_new_window(height, width, y, x);
 548     dlg_register_window(dialog, "formbox", binding);
 549     dlg_register_buttons(dialog, "formbox", buttons);
 550
 551     dlg_mouse_setbase(x, y);
 552
 553     dlg_draw_box2(dialog, 0, 0, height, width, dialog_attr, border_attr, border2_attr);
 554     dlg_draw_bottom_box2(dialog, border_attr, border2_attr, dialog_attr);
 555     dlg_draw_title(dialog, title);
 556
 557     (void) wattrset(dialog, dialog_attr);
 558     dlg_print_autowrap(dialog, prompt, height, width);
 559
 560     form_width = width - 6;
 561     getyx(dialog, cur_y, cur_x);
 562     (void) cur_x;
 563     box_y = cur_y + 1;
 564     box_x = (width - form_width) / 2 - 1;
 565
 566     /* create new window for the form */
 567     form = dlg_sub_window(dialog, form_height, form_width, y + box_y + 1,
 568                           x + box_x + 1);
 569     dlg_register_window(form, "formfield", binding2);
 570
 571     /* draw a box around the form items */
 572     dlg_draw_box(dialog, box_y, box_x, form_height + 2, form_width + 2,
 573                  menubox_border_attr, menubox_border2_attr);
 574
 575     /* register the new window, along with its borders */
 576     dlg_mouse_mkbigregion(getbegy(form) - getbegy(dialog),
 577                           getbegx(form) - getbegx(dialog),
 578                           getmaxy(form),
 579                           getmaxx(form),
 580                           KEY_MAX, 1, 1, 3 /* by cells */ );
 581
 582     show_buttons = TRUE;
 583     scroll_changed = TRUE;
 584
 585     choice = set_choice(items, choice, item_no, &non_editable);
 586     current = &items[choice];
 587     if (non_editable)
 588         state = next_valid_buttonindex(state, sTEXT, non_editable);
 589
 590     while (result == DLG_EXIT_UNKNOWN) {
 591         int edit = FALSE;
 592
 593         if (scroll_changed) {
 594             print_form(form, items, item_no, scrollamt, choice);
 595             dlg_draw_scrollbar(dialog,
 596                                scrollamt,
 597                                scrollamt,
 598                                scrollamt + form_height + 1,
 599                                min_height,
 600                                box_x + 1,
 601                                box_x + form_width,
 602                                box_y,
 603                                box_y + form_height + 1,
 604                                menubox_border2_attr,
 605                                menubox_border_attr);
 606             scroll_changed = FALSE;
 607         }
 608
 609         if (show_buttons) {
 610             dlg_item_help("");
 611             dlg_draw_buttons(dialog, height - 2, 0, buttons,
 612                              ((state < 0)
 613                               ? 1000    /* no such button, not highlighted */
 614                               : state),
 615                              FALSE, width);
 616             show_buttons = FALSE;
 617         }
 618
 619         if (first_trace) {
 620             first_trace = FALSE;
 621             dlg_trace_win(dialog);
 622         }
 623
 624         if (field_changed || state == sTEXT) {
 625             if (field_changed)
 626                 chr_offset = 0;
 627             current = &items[choice];
 628             dialog_vars.max_input = current->text_ilen;
 629             dlg_item_help(current->help);
 630             dlg_show_string(form, current->text, chr_offset,
 631                             form_active_text_attr,
 632                             current->text_y - scrollamt,
 633                             current->text_x,
 634                             current->text_len,
 635                             is_hidden(current), first);
 636             wsyncup(form);
 637             wcursyncup(form);
 638             field_changed = FALSE;
 639         }
 640
 641         key = dlg_mouse_wgetch((state == sTEXT) ? form : dialog, &fkey);
 642         if (dlg_result_key(key, fkey, &result))
 643             break;
 644
 645         /* handle non-functionkeys */
 646         if (!fkey) {
 647             if (state != sTEXT) {
 648                 code = dlg_char_to_button(key, buttons);
 649                 if (code >= 0) {
 650                     dlg_del_window(dialog);
 651                     result = dlg_ok_buttoncode(code);
 652                     continue;
 653                 }
 654                 if (key == ' ') {
 655                     fkey = TRUE;
 656                     key = DLGK_ENTER;
 657                 }
 658             }
 659         }
 660
 661         /* handle functionkeys */
 662         if (fkey) {
 663             bool do_scroll = FALSE;
 664             bool do_tab = FALSE;
 665             int move_by = 0;
 666
 667             switch (key) {
 668             case DLGK_MOUSE(KEY_PPAGE):
 669             case DLGK_PAGE_PREV:
 670                 do_scroll = TRUE;
 671                 move_by = -form_height;
 672                 break;
 673
 674             case DLGK_MOUSE(KEY_NPAGE):
 675             case DLGK_PAGE_NEXT:
 676                 do_scroll = TRUE;
 677                 move_by = form_height;
 678                 break;
 679
 680             case DLGK_ENTER:
 681                 dlg_del_window(dialog);
 682                 result = (state >= 0) ? dlg_enter_buttoncode(state) : DLG_EXIT_OK;
 683                 continue;
 684
 685             case DLGK_GRID_LEFT:
 686                 if (state == sTEXT)
 687                     break;
 688                 /* FALLTHRU */
 689             case DLGK_ITEM_PREV:
 690                 if (state == sTEXT) {
 691                     do_tab = TRUE;
 692                     move_by = -1;
 693                     break;
 694                 } else {
 695                     state = prev_valid_buttonindex(state, 0, non_editable);
 696                     show_buttons = TRUE;
 697                     continue;
 698                 }
 699
 700             case DLGK_FORM_PREV:
 701                 if (state == sTEXT && !is_first_field(items, choice)) {
 702                     do_tab = TRUE;
 703                     move_by = -1;
 704                     break;
 705                 } else {
 706                     int old_state = state;
 707                     state = prev_valid_buttonindex(state, sTEXT, non_editable);
 708                     show_buttons = TRUE;
 709                     if (old_state >= 0 && state == sTEXT) {
 710                         new_choice = item_no - 1;
 711                         if (choice != new_choice) {
 712                             print_item(form, items + choice, scrollamt, FALSE);
 713                             choice = new_choice;
 714                         }
 715                     }
 716                     continue;
 717                 }
 718
 719             case DLGK_FIELD_PREV:
 720                 state = prev_valid_buttonindex(state, sTEXT, non_editable);
 721                 show_buttons = TRUE;
 722                 continue;
 723
 724             case DLGK_FIELD_NEXT:
 725                 state = next_valid_buttonindex(state, sTEXT, non_editable);
 726                 show_buttons = TRUE;
 727                 continue;
 728
 729             case DLGK_GRID_RIGHT:
 730                 if (state == sTEXT)
 731                     break;
 732                 /* FALLTHRU */
 733
 734             case DLGK_ITEM_NEXT:
 735                 if (state == sTEXT) {
 736                     do_tab = TRUE;
 737                     move_by = 1;
 738                     break;
 739                 } else {
 740                     state = next_valid_buttonindex(state, 0, non_editable);
 741                     show_buttons = TRUE;
 742                     continue;
 743                 }
 744
 745             case DLGK_FORM_NEXT:
 746                 if (state == sTEXT && !is_last_field(items, choice, item_no)) {
 747                     do_tab = TRUE;
 748                     move_by = 1;
 749                     break;
 750                 } else {
 751                     state = next_valid_buttonindex(state, sTEXT, non_editable);
 752                     show_buttons = TRUE;
 753                     if (state == sTEXT && choice) {
 754                         print_item(form, items + choice, scrollamt, FALSE);
 755                         choice = 0;
 756                     }
 757                     continue;
 758                 }
 759
 760 #ifdef KEY_RESIZE
 761             case KEY_RESIZE:
 762                 /* reset data */
 763                 height = old_height;
 764                 width = old_width;
 765                 /* repaint */
 766                 dlg_clear();
 767                 dlg_del_window(dialog);
 768                 refresh();
 769                 dlg_mouse_free_regions();
 770                 goto retry;
 771 #endif
 772             default:
 773 #if USE_MOUSE
 774                 if (is_DLGK_MOUSE(key)) {
 775                     if (key >= DLGK_MOUSE(KEY_MAX)) {
 776                         int cell = key - DLGK_MOUSE(KEY_MAX);
 777                         int row = (cell / getmaxx(form)) + scrollamt;
 778                         int col = (cell % getmaxx(form));
 779                         int n;
 780
 781                         for (n = 0; n < item_no; ++n) {
 782                             if (items[n].name_y == row
 783                                 && items[n].name_x <= col
 784                                 && (items[n].name_x + items[n].name_len > col
 785                                     || (items[n].name_y == items[n].text_y
 786                                         && items[n].text_x > col))) {
 787                                 if (!is_readonly(&(items[n]))) {
 788                                     field_changed = TRUE;
 789                                     break;
 790                                 }
 791                             }
 792                             if (items[n].text_y == row
 793                                 && items[n].text_x <= col
 794                                 && items[n].text_x + items[n].text_ilen > col) {
 795                                 if (!is_readonly(&(items[n]))) {
 796                                     field_changed = TRUE;
 797                                     break;
 798                                 }
 799                             }
 800                         }
 801                         if (field_changed) {
 802                             print_item(form, items + choice, scrollamt, FALSE);
 803                             choice = n;
 804                             continue;
 805                         }
 806                         beep();
 807                     } else if ((code = dlg_ok_buttoncode(key - M_EVENT)) >= 0) {
 808                         result = code;
 809                     }
 810                     continue;
 811                 }
 812 #endif
 813                 break;
 814             }
 815
 816             new_scroll = scrollamt;
 817             new_choice = choice;
 818             if (do_scroll) {
 819                 if (scroll_next(form, items, move_by, &new_choice, &new_scroll)) {
 820                     if (choice != new_choice) {
 821                         choice = new_choice;
 822                         field_changed = TRUE;
 823                     }
 824                     if (scrollamt != new_scroll) {
 825                         scrollamt = new_scroll;
 826                         scroll_changed = TRUE;
 827                     }
 828                 }
 829                 continue;
 830             }
 831             if (do_tab) {
 832                 if (tab_next(form, items, item_no, move_by, &new_choice, &new_scroll)) {
 833                     if (choice != new_choice) {
 834                         choice = new_choice;
 835                         field_changed = TRUE;
 836                     }
 837                     if (scrollamt != new_scroll) {
 838                         scrollamt = new_scroll;
 839                         scroll_changed = TRUE;
 840                     }
 841                 }
 842                 continue;
 843             }
 844         }
 845
 846         if (state == sTEXT) {   /* Input box selected */
 847             if (!is_readonly(current))
 848                 edit = dlg_edit_string(current->text, &chr_offset, key,
 849                                        fkey, first);
 850             if (edit) {
 851                 dlg_show_string(form, current->text, chr_offset,
 852                                 form_active_text_attr,
 853                                 current->text_y - scrollamt,
 854                                 current->text_x,
 855                                 current->text_len,
 856                                 is_hidden(current), first);
 857                 continue;
 858             }
 859         }
 860
 861     }
 862
 863     dlg_mouse_free_regions();
 864     dlg_del_window(dialog);
 865     free(prompt);
 866
 867     *current_item = choice;
 868     return result;
 869 }
 870
 871 /*
 872  * Free memory owned by a list of DIALOG_FORMITEM's.
 873  */
 874 void
 875 dlg_free_formitems(DIALOG_FORMITEM * items)
 876 {
 877     int n;
 878     for (n = 0; items[n].name != 0; ++n) {
 879         if (items[n].name_free)
 880             free(items[n].name);
 881         if (items[n].text_free)
 882             free(items[n].text);
 883         if (items[n].help_free && items[n].help != dlg_strempty())
 884             free(items[n].help);
 885     }
 886     free(items);
 887 }
 888
 889 /*
 890  * The script accepts values beginning at 1, while curses starts at 0.
 891  */
 892 int
 893 dlg_ordinate(const char *s)
 894 {
 895     int result = atoi(s);
 896     if (result > 0)
 897         --result;
 898     else
 899         result = 0;
 900     return result;
 901 }
 902
 903 int
 904 dialog_form(const char *title,
 905             const char *cprompt,
 906             int height,
 907             int width,
 908             int form_height,
 909             int item_no,
 910             char **items)
 911 {
 912     int result;
 913     int choice;
 914     int i;
 915     DIALOG_FORMITEM *listitems;
 916     DIALOG_VARS save_vars;
 917     bool show_status = FALSE;
 918     char *help_result;
 919
 920     dlg_save_vars(&save_vars);
 921     dialog_vars.separate_output = TRUE;
 922
 923     listitems = dlg_calloc(DIALOG_FORMITEM, (size_t) item_no + 1);
 924     assert_ptr(listitems, "dialog_form");
 925
 926     for (i = 0; i < item_no; ++i) {
 927         listitems[i].type = dialog_vars.formitem_type;
 928         listitems[i].name = ItemName(i);
 929         listitems[i].name_len = (int) strlen(ItemName(i));
 930         listitems[i].name_y = dlg_ordinate(ItemNameY(i));
 931         listitems[i].name_x = dlg_ordinate(ItemNameX(i));
 932         listitems[i].text = ItemText(i);
 933         listitems[i].text_len = (int) strlen(ItemText(i));
 934         listitems[i].text_y = dlg_ordinate(ItemTextY(i));
 935         listitems[i].text_x = dlg_ordinate(ItemTextX(i));
 936         listitems[i].text_flen = atoi(ItemTextFLen(i));
 937         listitems[i].text_ilen = atoi(ItemTextILen(i));
 938         listitems[i].help = ((dialog_vars.item_help)
 939                              ? ItemHelp(i)
 940                              : dlg_strempty());
 941     }
 942
 943     result = dlg_form(title,
 944                       cprompt,
 945                       height,
 946                       width,
 947                       form_height,
 948                       item_no,
 949                       listitems,
 950                       &choice);
 951
 952     switch (result) {
 953     case DLG_EXIT_OK:           /* FALLTHRU */
 954     case DLG_EXIT_EXTRA:
 955         show_status = TRUE;
 956         break;
 957     case DLG_EXIT_HELP:
 958         dlg_add_help_formitem(&result, &help_result, &listitems[choice]);
 959         show_status = dialog_vars.help_status;
 960         dlg_add_string(help_result);
 961         if (show_status)
 962             dlg_add_separator();
 963         break;
 964     }
 965     if (show_status) {
 966         for (i = 0; i < item_no; i++) {
 967             if (listitems[i].text_flen > 0) {
 968                 dlg_add_string(listitems[i].text);
 969                 dlg_add_separator();
 970             }
 971         }
 972         dlg_add_last_key(-1);
 973     }
 974
 975     dlg_free_formitems(listitems);
 976     dlg_restore_vars(&save_vars);
 977
 978     return result;
 979 }