git.ozlabs.org Git - petitboot/blob - ui/ncurses/nc-widgets.c

   1 /*
   2  *  Copyright (C) 2013 IBM Corporation
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation; version 2 of the License.
   7  *
   8  *  This program is distributed in the hope that it will be useful,
   9  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  *  GNU General Public License for more details.
  12  *
  13  *  You should have received a copy of the GNU General Public License
  14  *  along with this program; if not, write to the Free Software
  15  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  16  */
  17
  18 #if defined(HAVE_CONFIG_H)
  19 #include "config.h"
  20 #endif
  21
  22 #include <linux/input.h> /* This must be included before ncurses.h */
  23 #if defined HAVE_NCURSESW_CURSES_H
  24 #  include <ncursesw/curses.h>
  25 #elif defined HAVE_NCURSESW_H
  26 #  include <ncursesw.h>
  27 #elif defined HAVE_NCURSES_CURSES_H
  28 #  include <ncurses/curses.h>
  29 #elif defined HAVE_NCURSES_H
  30 #  include <ncurses.h>
  31 #elif defined HAVE_CURSES_H
  32 #  include <curses.h>
  33 #else
  34 #  error "Curses header file not found."
  35 #endif
  36
  37 #if defined HAVE_NCURSESW_FORM_H
  38 #  include <ncursesw/form.h>
  39 #elif defined HAVE_NCURSES_FORM_H
  40 #  include <ncurses/form.h>
  41 #elif defined HAVE_FORM_H
  42 #  include <form.h>
  43 #else
  44 #  error "Curses form.h not found."
  45 #endif
  46
  47 #include <string.h>
  48 #include <ctype.h>
  49
  50 #include <talloc/talloc.h>
  51 #include <types/types.h>
  52 #include <log/log.h>
  53 #include <util/util.h>
  54
  55 #include "nc-cui.h"
  56 #include "nc-widgets.h"
  57
  58 #undef move
  59
  60 #define to_checkbox(w) container_of(w, struct nc_widget_checkbox, widget)
  61 #define to_textbox(w) container_of(w, struct nc_widget_textbox, widget)
  62 #define to_button(w) container_of(w, struct nc_widget_button, widget)
  63 #define to_select(w) container_of(w, struct nc_widget_select, widget)
  64
  65 static const char *checkbox_checked_str = "[*]";
  66 static const char *checkbox_unchecked_str = "[ ]";
  67
  68 static const char *select_selected_str = "(*)";
  69 static const char *select_unselected_str = "( )";
  70
  71 struct nc_widgetset {
  72         WINDOW  *mainwin;
  73         WINDOW  *subwin;
  74         FORM    *form;
  75         FIELD   **fields;
  76         int     n_fields, n_alloc_fields;
  77         void    (*widget_focus)(struct nc_widget *, void *);
  78         void    *widget_focus_arg;
  79         FIELD   *cur_field;
  80
  81         /* custom validators */
  82         FIELDTYPE *ipv4_multi_type;
  83 };
  84
  85 struct nc_widget {
  86         FIELD   *field;
  87         bool    (*process_key)(struct nc_widget *, FORM *, int);
  88         void    (*set_visible)(struct nc_widget *, bool);
  89         void    (*move)(struct nc_widget *, int, int);
  90         void    (*field_focus)(struct nc_widget *, FIELD *);
  91         int     focussed_attr;
  92         int     unfocussed_attr;
  93         int     height;
  94         int     width;
  95         int     focus_y;
  96         int     x;
  97         int     y;
  98 };
  99
 100 struct nc_widget_label {
 101         struct nc_widget        widget;
 102         const char              *text;
 103 };
 104
 105 struct nc_widget_checkbox {
 106         struct nc_widget        widget;
 107         bool                    checked;
 108 };
 109
 110 struct nc_widget_textbox {
 111         struct nc_widgetset     *set;
 112         struct nc_widget        widget;
 113 };
 114
 115 struct nc_widget_select {
 116         struct nc_widget        widget;
 117         struct select_option {
 118                 char            *str;
 119                 int             val;
 120                 FIELD           *field;
 121         } *options;
 122         int                     top, left, size;
 123         int                     n_options, selected_option;
 124         struct nc_widgetset     *set;
 125         void                    (*on_change)(void *, int);
 126         void                    *on_change_arg;
 127 };
 128
 129 struct nc_widget_button {
 130         struct nc_widget        widget;
 131         void                    (*click)(void *arg);
 132         void                    *arg;
 133 };
 134
 135 static void widgetset_add_field(struct nc_widgetset *set, FIELD *field);
 136 static void widgetset_remove_field(struct nc_widgetset *set, FIELD *field);
 137
 138 static bool key_is_select(int key)
 139 {
 140         return key == ' ' || key == '\r' || key == '\n' || key == KEY_ENTER;
 141 }
 142
 143 static bool process_key_nop(struct nc_widget *widget __attribute__((unused)),
 144                 FORM *form __attribute((unused)),
 145                 int key __attribute__((unused)))
 146 {
 147         return false;
 148 }
 149
 150 static void field_set_visible(FIELD *field, bool visible)
 151 {
 152         int opts = field_opts(field) & ~O_VISIBLE;
 153         if (visible)
 154                 opts |= O_VISIBLE;
 155         set_field_opts(field, opts);
 156 }
 157
 158 static void field_move(FIELD *field, int y, int x)
 159 {
 160         move_field(field, y, x);
 161 }
 162
 163 static int label_destructor(void *ptr)
 164 {
 165         struct nc_widget_label *label = ptr;
 166         free_field(label->widget.field);
 167         return 0;
 168 }
 169
 170
 171 struct nc_widget_label *widget_new_label(struct nc_widgetset *set,
 172                 int y, int x, char *str)
 173 {
 174         struct nc_widget_label *label;
 175         FIELD *f;
 176         int len;
 177
 178         len = strlen(str);
 179
 180         label = talloc_zero(set, struct nc_widget_label);
 181         label->widget.height = 1;
 182         label->widget.width = len;
 183         label->widget.x = x;
 184         label->widget.y = y;
 185         label->widget.process_key = process_key_nop;
 186         label->widget.field = f = new_field(1, len, y, x, 0, 0);
 187         label->widget.focussed_attr = A_NORMAL;
 188         label->widget.unfocussed_attr = A_NORMAL;
 189
 190         field_opts_off(f, O_ACTIVE);
 191         set_field_buffer(f, 0, str);
 192         set_field_userptr(f, &label->widget);
 193
 194         widgetset_add_field(set, label->widget.field);
 195         talloc_set_destructor(label, label_destructor);
 196
 197         return label;
 198 }
 199
 200 bool widget_checkbox_get_value(struct nc_widget_checkbox *checkbox)
 201 {
 202         return checkbox->checked;
 203 }
 204
 205 static void checkbox_set_buffer(struct nc_widget_checkbox *checkbox)
 206 {
 207         const char *str;
 208         str = checkbox->checked ? checkbox_checked_str : checkbox_unchecked_str;
 209         set_field_buffer(checkbox->widget.field, 0, str);
 210 }
 211
 212 static bool checkbox_process_key(struct nc_widget *widget,
 213                 FORM *form __attribute__((unused)), int key)
 214 {
 215         struct nc_widget_checkbox *checkbox = to_checkbox(widget);
 216
 217         if (!key_is_select(key))
 218                 return false;
 219
 220         checkbox->checked = !checkbox->checked;
 221         checkbox_set_buffer(checkbox);
 222
 223         return true;
 224 }
 225
 226 static int checkbox_destructor(void *ptr)
 227 {
 228         struct nc_widget_checkbox *checkbox = ptr;
 229         free_field(checkbox->widget.field);
 230         return 0;
 231 }
 232
 233 struct nc_widget_checkbox *widget_new_checkbox(struct nc_widgetset *set,
 234                 int y, int x, bool checked)
 235 {
 236         struct nc_widget_checkbox *checkbox;
 237         FIELD *f;
 238
 239         checkbox = talloc_zero(set, struct nc_widget_checkbox);
 240         checkbox->checked = checked;
 241         checkbox->widget.height = 1;
 242         checkbox->widget.width = strlen(checkbox_checked_str);
 243         checkbox->widget.x = x;
 244         checkbox->widget.y = y;
 245         checkbox->widget.process_key = checkbox_process_key;
 246         checkbox->widget.focussed_attr = A_REVERSE;
 247         checkbox->widget.unfocussed_attr = A_NORMAL;
 248         checkbox->widget.field = f = new_field(1, strlen(checkbox_checked_str),
 249                         y, x, 0, 0);
 250
 251         field_opts_off(f, O_EDIT);
 252         set_field_userptr(f, &checkbox->widget);
 253         checkbox_set_buffer(checkbox);
 254
 255         widgetset_add_field(set, checkbox->widget.field);
 256         talloc_set_destructor(checkbox, checkbox_destructor);
 257
 258         return checkbox;
 259 }
 260
 261 static char *strip_string(char *str)
 262 {
 263         int len, i;
 264
 265         len = strlen(str);
 266
 267         /* clear trailing space */
 268         for (i = len - 1; i >= 0; i--) {
 269                 if (!isspace(str[i]))
 270                         break;
 271                 str[i] = '\0';
 272         }
 273
 274         /* increment str past leading space */
 275         for (i = 0; i < len; i++) {
 276                 if (str[i] == '\0' || !isspace(str[i]))
 277                         break;
 278         }
 279
 280         return str + i;
 281 }
 282
 283 char *widget_textbox_get_value(struct nc_widget_textbox *textbox)
 284 {
 285         char *str = field_buffer(textbox->widget.field, 0);
 286         return str ? strip_string(str) : NULL;
 287 }
 288
 289 static bool textbox_process_key(
 290                 struct nc_widget *widget __attribute__((unused)),
 291                 FORM *form, int key)
 292 {
 293         switch (key) {
 294         case KEY_HOME:
 295                 form_driver(form, REQ_BEG_FIELD);
 296                 break;
 297         case KEY_END:
 298                 form_driver(form, REQ_END_FIELD);
 299                 break;
 300         case KEY_LEFT:
 301                 form_driver(form, REQ_LEFT_CHAR);
 302                 break;
 303         case KEY_RIGHT:
 304                 form_driver(form, REQ_RIGHT_CHAR);
 305                 break;
 306         case KEY_BACKSPACE:
 307                 if (form_driver(form, REQ_LEFT_CHAR) != E_OK)
 308                         break;
 309                 /* fall through */
 310         case KEY_DC:
 311                 form_driver(form, REQ_DEL_CHAR);
 312                 break;
 313         default:
 314                 form_driver(form, key);
 315                 break;
 316         }
 317
 318         return true;
 319 }
 320
 321 static int textbox_destructor(void *ptr)
 322 {
 323         struct nc_widget_textbox *textbox = ptr;
 324         free_field(textbox->widget.field);
 325         return 0;
 326 }
 327
 328 struct nc_widget_textbox *widget_new_textbox(struct nc_widgetset *set,
 329                 int y, int x, int len, char *str)
 330 {
 331         struct nc_widget_textbox *textbox;
 332         FIELD *f;
 333
 334         textbox = talloc_zero(set, struct nc_widget_textbox);
 335         textbox->set = set;
 336         textbox->widget.height = 1;
 337         textbox->widget.width = len;
 338         textbox->widget.x = x;
 339         textbox->widget.y = y;
 340         textbox->widget.process_key = textbox_process_key;
 341         textbox->widget.field = f = new_field(1, len, y, x, 0, 0);
 342         textbox->widget.focussed_attr = A_REVERSE;
 343         textbox->widget.unfocussed_attr = A_UNDERLINE;
 344
 345         field_opts_off(f, O_STATIC | O_WRAP | O_BLANK);
 346         set_field_buffer(f, 0, str);
 347         set_field_back(f, textbox->widget.unfocussed_attr);
 348         set_field_userptr(f, &textbox->widget);
 349
 350         widgetset_add_field(set, textbox->widget.field);
 351         talloc_set_destructor(textbox, textbox_destructor);
 352
 353         return textbox;
 354 }
 355
 356 void widget_textbox_set_validator_integer(struct nc_widget_textbox *textbox,
 357                 long min, long max)
 358 {
 359         set_field_type(textbox->widget.field, TYPE_INTEGER, 1, min, max);
 360 }
 361
 362 void widget_textbox_set_validator_ipv4(struct nc_widget_textbox *textbox)
 363 {
 364         set_field_type(textbox->widget.field, TYPE_IPV4);
 365 }
 366
 367 static bool check_ipv4_multi_char(int c,
 368                 const void *arg __attribute__((unused)))
 369 {
 370         return isdigit(c) || c == '.' || c == ' ';
 371 }
 372
 373 static bool check_ipv4_multi_field(FIELD *field,
 374                 const void *arg __attribute__((unused)))
 375 {
 376         char *buf = field_buffer(field, 0);
 377         unsigned int ip[4];
 378         int n, len;
 379
 380         while (*buf != '\0') {
 381                 n = sscanf(buf, "%u.%u.%u.%u%n",
 382                                 &ip[0], &ip[1], &ip[2], &ip[3], &len);
 383                 if (n != 4)
 384                         return false;
 385
 386                 if (ip[0] > 255 || ip[1] > 255 || ip[2] > 255 || ip[3] > 255)
 387                         return false;
 388
 389                 for (buf += len; *buf != '\0'; buf++) {
 390                         if (isspace(*buf))
 391                                 continue;
 392                         else if (isdigit(*buf))
 393                                 break;
 394                         else
 395                                 return false;
 396                 }
 397         }
 398
 399         return true;
 400 }
 401
 402 void widget_textbox_set_validator_ipv4_multi(struct nc_widget_textbox *textbox)
 403 {
 404         if (!textbox->set->ipv4_multi_type) {
 405                 textbox->set->ipv4_multi_type = new_fieldtype(
 406                                 check_ipv4_multi_field,
 407                                 check_ipv4_multi_char);
 408         }
 409         set_field_type(textbox->widget.field, textbox->set->ipv4_multi_type);
 410 }
 411
 412 static void select_option_change(struct select_option *opt, bool selected)
 413 {
 414         const char *str;
 415
 416         str = selected ? select_selected_str : select_unselected_str;
 417
 418         memcpy(opt->str, str, strlen(str));
 419         set_field_buffer(opt->field, 0, opt->str);
 420 }
 421
 422 static bool select_process_key(struct nc_widget *w, FORM *form, int key)
 423 {
 424         struct nc_widget_select *select = to_select(w);
 425         struct select_option *new_opt, *old_opt;
 426         int i, new_idx;
 427         FIELD *field;
 428
 429         if (!key_is_select(key))
 430                 return false;
 431
 432         field = current_field(form);
 433         new_opt = NULL;
 434
 435         for (i = 0; i < select->n_options; i++) {
 436                 if (select->options[i].field == field) {
 437                         new_opt = &select->options[i];
 438                         new_idx = i;
 439                         break;
 440                 }
 441         }
 442
 443         if (!new_opt)
 444                 return true;
 445
 446         if (new_idx == select->selected_option)
 447                 return true;
 448
 449         old_opt = &select->options[select->selected_option];
 450
 451         select_option_change(old_opt, false);
 452         select_option_change(new_opt, true);
 453
 454         select->selected_option = new_idx;
 455
 456         if (select->on_change)
 457                 select->on_change(select->on_change_arg, new_opt->val);
 458
 459         return true;
 460 }
 461
 462 static void select_set_visible(struct nc_widget *widget, bool visible)
 463 {
 464         struct nc_widget_select *select = to_select(widget);
 465         int i;
 466
 467         for (i = 0; i < select->n_options; i++)
 468                 field_set_visible(select->options[i].field, visible);
 469 }
 470
 471 static void select_move(struct nc_widget *widget, int y, int x)
 472 {
 473         struct nc_widget_select *select = to_select(widget);
 474         int i;
 475
 476         for (i = 0; i < select->n_options; i++)
 477                 field_move(select->options[i].field, y + i, x);
 478 }
 479
 480 static void select_field_focus(struct nc_widget *widget, FIELD *field)
 481 {
 482         struct nc_widget_select *select = to_select(widget);
 483         int i;
 484
 485         for (i = 0; i < select->n_options; i++) {
 486                 if (field != select->options[i].field)
 487                         continue;
 488                 widget->focus_y = i;
 489                 return;
 490         }
 491 }
 492
 493 static int select_destructor(void *ptr)
 494 {
 495         struct nc_widget_select *select = ptr;
 496         int i;
 497
 498         for (i = 0; i < select->n_options; i++)
 499                 free_field(select->options[i].field);
 500
 501         return 0;
 502 }
 503
 504 struct nc_widget_select *widget_new_select(struct nc_widgetset *set,
 505                 int y, int x, int len)
 506 {
 507         struct nc_widget_select *select;
 508
 509         select = talloc_zero(set, struct nc_widget_select);
 510         select->widget.width = len;
 511         select->widget.height = 0;
 512         select->widget.x = x;
 513         select->widget.y = y;
 514         select->widget.process_key = select_process_key;
 515         select->widget.set_visible = select_set_visible;
 516         select->widget.move = select_move;
 517         select->widget.field_focus = select_field_focus;
 518         select->widget.focussed_attr = A_REVERSE;
 519         select->widget.unfocussed_attr = A_NORMAL;
 520         select->top = y;
 521         select->left = x;
 522         select->size = len;
 523         select->set = set;
 524
 525         talloc_set_destructor(select, select_destructor);
 526
 527         return select;
 528 }
 529
 530 void widget_select_add_option(struct nc_widget_select *select, int value,
 531                 const char *text, bool selected)
 532 {
 533         const char *str;
 534         FIELD *f;
 535         int i;
 536
 537         /* if we never see an option with selected set, we want the first
 538          * one to be selected */
 539         if (select->n_options == 0)
 540                 selected = true;
 541         else if (selected)
 542                 select_option_change(&select->options[select->selected_option],
 543                                         false);
 544
 545         if (selected) {
 546                 select->selected_option = select->n_options;
 547                 str = select_selected_str;
 548         } else
 549                 str = select_unselected_str;
 550
 551         i = select->n_options++;
 552         select->widget.height = select->n_options;
 553
 554         select->options = talloc_realloc(select, select->options,
 555                                 struct select_option, i + 2);
 556         select->options[i].val = value;
 557         select->options[i].str = talloc_asprintf(select->options,
 558                                         "%s %s", str, text);
 559
 560         select->options[i].field = f = new_field(1, select->size,
 561                                                 select->top + i,
 562                                                 select->left, 0, 0);
 563
 564         field_opts_off(f, O_WRAP | O_EDIT);
 565         set_field_userptr(f, &select->widget);
 566         set_field_buffer(f, 0, select->options[i].str);
 567
 568         widgetset_add_field(select->set, f);
 569 }
 570
 571 int widget_select_get_value(struct nc_widget_select *select)
 572 {
 573         if (!select->n_options)
 574                 return -1;
 575         return select->options[select->selected_option].val;
 576 }
 577
 578 int widget_select_height(struct nc_widget_select *select)
 579 {
 580         return select->n_options;
 581 }
 582
 583 void widget_select_on_change(struct nc_widget_select *select,
 584                 void (*on_change)(void *, int), void *arg)
 585 {
 586         select->on_change = on_change;
 587         select->on_change_arg = arg;
 588 }
 589
 590 void widget_select_drop_options(struct nc_widget_select *select)
 591 {
 592         struct nc_widgetset *set = select->set;
 593         int i;
 594
 595         for (i = 0; i < select->n_options; i++) {
 596                 FIELD *field = select->options[i].field;
 597                 widgetset_remove_field(set, field);
 598                 if (field == set->cur_field)
 599                         set->cur_field = NULL;
 600                 free_field(select->options[i].field);
 601         }
 602
 603         talloc_free(select->options);
 604         select->options = NULL;
 605         select->n_options = 0;
 606         select->widget.height = 0;
 607         select->widget.focus_y = 0;
 608
 609 }
 610
 611 static bool button_process_key(struct nc_widget *widget,
 612                 FORM *form __attribute__((unused)), int key)
 613 {
 614         struct nc_widget_button *button = to_button(widget);
 615
 616         if (!button->click)
 617                 return false;
 618
 619         if (!key_is_select(key))
 620                 return false;
 621
 622         button->click(button->arg);
 623         return true;
 624 }
 625
 626 static int button_destructor(void *ptr)
 627 {
 628         struct nc_widget_button *button = ptr;
 629         free_field(button->widget.field);
 630         return 0;
 631 }
 632
 633 struct nc_widget_button *widget_new_button(struct nc_widgetset *set,
 634                 int y, int x, int size, const char *str,
 635                 void (*click)(void *), void *arg)
 636 {
 637         struct nc_widget_button *button;
 638         char *text;
 639         FIELD *f;
 640         int idx, len;
 641
 642         button = talloc_zero(set, struct nc_widget_button);
 643         button->widget.height = 1;
 644         button->widget.width = size;
 645         button->widget.x = x;
 646         button->widget.y = y;
 647         button->widget.field = f = new_field(1, size + 2, y, x, 0, 0);
 648         button->widget.process_key = button_process_key;
 649         button->widget.focussed_attr = A_REVERSE;
 650         button->widget.unfocussed_attr = A_NORMAL;
 651         button->click = click;
 652         button->arg = arg;
 653
 654         field_opts_off(f, O_EDIT);
 655         set_field_userptr(f, &button->widget);
 656
 657         /* center str in a size-char buffer, but don't overrun */
 658         len = strlen(str);
 659         len = min(len, size);
 660         idx = (size - len) / 2;
 661
 662         text = talloc_array(button, char, size + 3);
 663         memset(text, ' ', size + 2);
 664         memcpy(text + idx + 1, str, len);
 665         text[0] = '[';
 666         text[size + 1] = ']';
 667         text[size + 2] = '\0';
 668
 669         set_field_buffer(f, 0, text);
 670
 671         widgetset_add_field(set, button->widget.field);
 672         talloc_set_destructor(button, button_destructor);
 673
 674         return button;
 675 }
 676
 677 static void widget_focus_change(struct nc_widget *widget, FIELD *field,
 678                 bool focussed)
 679 {
 680         int attr = focussed ? widget->focussed_attr : widget->unfocussed_attr;
 681         set_field_back(field, attr);
 682 }
 683
 684 bool widgetset_process_key(struct nc_widgetset *set, int key)
 685 {
 686         struct nc_widget *widget;
 687         FIELD *field;
 688         int req = 0;
 689
 690         field = current_field(set->form);
 691         assert(field);
 692
 693         /* handle field change events */
 694         switch (key) {
 695         case KEY_BTAB:
 696         case KEY_UP:
 697                 req = REQ_PREV_FIELD;
 698                 break;
 699         case '\t':
 700         case KEY_DOWN:
 701                 req = REQ_NEXT_FIELD;
 702                 break;
 703         case KEY_PPAGE:
 704                 req = REQ_FIRST_FIELD;
 705                 break;
 706         case KEY_NPAGE:
 707                 req = REQ_LAST_FIELD;
 708                 break;
 709         }
 710
 711         widget = field_userptr(field);
 712         if (req) {
 713                 widget_focus_change(widget, field, false);
 714                 form_driver(set->form, req);
 715                 form_driver(set->form, REQ_END_FIELD);
 716                 field = current_field(set->form);
 717                 widget = field_userptr(field);
 718                 widget_focus_change(widget, field, true);
 719                 if (widget->field_focus)
 720                         widget->field_focus(widget, field);
 721                 if (set->widget_focus)
 722                         set->widget_focus(widget, set->widget_focus_arg);
 723                 return true;
 724         }
 725
 726         if (!widget->process_key)
 727                 return false;
 728
 729         return widget->process_key(widget, set->form, key);
 730 }
 731
 732 static int widgetset_destructor(void *ptr)
 733 {
 734         struct nc_widgetset *set = ptr;
 735         free_form(set->form);
 736         if (set->ipv4_multi_type)
 737                 free_fieldtype(set->ipv4_multi_type);
 738         return 0;
 739 }
 740
 741 struct nc_widgetset *widgetset_create(void *ctx, WINDOW *main, WINDOW *sub)
 742 {
 743         struct nc_widgetset *set;
 744
 745         set = talloc_zero(ctx, struct nc_widgetset);
 746         set->n_alloc_fields = 8;
 747         set->mainwin = main;
 748         set->subwin = sub;
 749         set->fields = talloc_array(set, FIELD *, set->n_alloc_fields);
 750         talloc_set_destructor(set, widgetset_destructor);
 751
 752         return set;
 753 }
 754
 755 void widgetset_set_windows(struct nc_widgetset *set,
 756                 WINDOW *main, WINDOW *sub)
 757 {
 758         set->mainwin = main;
 759         set->subwin = sub;
 760 }
 761
 762 void widgetset_set_widget_focus(struct nc_widgetset *set,
 763                 widget_focus_cb cb, void *arg)
 764 {
 765         set->widget_focus = cb;
 766         set->widget_focus_arg = arg;
 767 }
 768
 769 void widgetset_post(struct nc_widgetset *set)
 770 {
 771         struct nc_widget *widget;
 772         FIELD *field;
 773
 774         set->form = new_form(set->fields);
 775         set_form_win(set->form, set->mainwin);
 776         set_form_sub(set->form, set->subwin);
 777         post_form(set->form);
 778         form_driver(set->form, REQ_END_FIELD);
 779
 780         if (set->cur_field) {
 781                 set_current_field(set->form, set->cur_field);
 782                 field = set->cur_field;
 783         }
 784
 785         field = current_field(set->form);
 786         widget = field_userptr(field);
 787         widget_focus_change(widget, field, true);
 788         if (set->widget_focus)
 789                 set->widget_focus(widget, set->widget_focus_arg);
 790 }
 791
 792 void widgetset_unpost(struct nc_widgetset *set)
 793 {
 794         set->cur_field = current_field(set->form);
 795         unpost_form(set->form);
 796         free_form(set->form);
 797         set->form = NULL;
 798 }
 799
 800 static void widgetset_add_field(struct nc_widgetset *set, FIELD *field)
 801 {
 802         if (set->n_fields == set->n_alloc_fields - 1) {
 803                 set->n_alloc_fields *= 2;
 804                 set->fields = talloc_realloc(set, set->fields,
 805                                 FIELD *, set->n_alloc_fields);
 806         }
 807
 808         set->n_fields++;
 809         set->fields[set->n_fields - 1] = field;
 810         set->fields[set->n_fields] = NULL;
 811 }
 812
 813 static void widgetset_remove_field(struct nc_widgetset *set, FIELD *field)
 814 {
 815         int i;
 816
 817         for (i = 0; i < set->n_fields; i++) {
 818                 if (set->fields[i] == field)
 819                         break;
 820         }
 821
 822         if (i == set->n_fields)
 823                 return;
 824
 825         memmove(&set->fields[i], &set->fields[i+i],
 826                         (set->n_fields - i) * sizeof(set->fields[i]));
 827         set->n_fields--;
 828 }
 829
 830 #define DECLARE_BASEFN(type) \
 831         struct nc_widget *widget_ ## type ## _base              \
 832                 (struct nc_widget_ ## type *w)                  \
 833         { return &w->widget; }
 834
 835 DECLARE_BASEFN(textbox);
 836 DECLARE_BASEFN(checkbox);
 837 DECLARE_BASEFN(select);
 838 DECLARE_BASEFN(label);
 839 DECLARE_BASEFN(button);
 840
 841 void widget_set_visible(struct nc_widget *widget, bool visible)
 842 {
 843         if (widget->set_visible)
 844                 widget->set_visible(widget, visible);
 845         else
 846                 field_set_visible(widget->field, visible);
 847 }
 848
 849 void widget_move(struct nc_widget *widget, int y, int x)
 850 {
 851         if (widget->move)
 852                 widget->move(widget, y, x);
 853         else
 854                 field_move(widget->field, y, x);
 855
 856         widget->x = x;
 857         widget->y = y;
 858 }
 859
 860 int widget_height(struct nc_widget *widget)
 861 {
 862         return widget->height;
 863 }
 864
 865 int widget_width(struct nc_widget *widget)
 866 {
 867         return widget->width;
 868 }
 869
 870 int widget_x(struct nc_widget *widget)
 871 {
 872         return widget->x;
 873 }
 874
 875 int widget_y(struct nc_widget *widget)
 876 {
 877         return widget->y;
 878 }
 879
 880 int widget_focus_y(struct nc_widget *widget)
 881 {
 882         return widget->focus_y;
 883 }
 884