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 <arpa/inet.h>
  48 #include <ctype.h>
  49 #include <stdlib.h>
  50 #include <string.h>
  51
  52 #include <talloc/talloc.h>
  53 #include <types/types.h>
  54 #include <log/log.h>
  55 #include <util/util.h>
  56 #include <i18n/i18n.h>
  57 #include <fold/fold.h>
  58 #include <url/url.h>
  59
  60 #include "nc-cui.h"
  61 #include "nc-widgets.h"
  62
  63 #undef move
  64
  65 #define to_checkbox(w) container_of(w, struct nc_widget_checkbox, widget)
  66 #define to_textbox(w) container_of(w, struct nc_widget_textbox, widget)
  67 #define to_button(w) container_of(w, struct nc_widget_button, widget)
  68 #define to_select(w) container_of(w, struct nc_widget_select, widget)
  69 #define to_subset(w) container_of(w, struct nc_widget_subset, widget)
  70
  71 static const char *checkbox_checked_str = "[*]";
  72 static const char *checkbox_unchecked_str = "[ ]";
  73
  74 static const char *select_selected_str = "(*)";
  75 static const char *select_unselected_str = "( )";
  76
  77 struct nc_widgetset {
  78         WINDOW  *mainwin;
  79         WINDOW  *subwin;
  80         FORM    *form;
  81         FIELD   **fields;
  82         int     n_fields, n_alloc_fields;
  83         void    (*widget_focus)(struct nc_widget *, void *);
  84         void    *widget_focus_arg;
  85         FIELD   *cur_field;
  86
  87         /* custom validators */
  88         FIELDTYPE *ip_multi_type;
  89         FIELDTYPE *ip_type;
  90         FIELDTYPE *url_type;
  91 };
  92
  93 struct nc_widget {
  94         FIELD   *field;
  95         bool    (*process_key)(struct nc_widget *, FORM *, int);
  96         void    (*set_visible)(struct nc_widget *, bool);
  97         void    (*move)(struct nc_widget *, int, int);
  98         void    (*field_focus)(struct nc_widget *, FIELD *);
  99         int     focussed_attr;
 100         int     unfocussed_attr;
 101         int     height;
 102         int     width;
 103         int     focus_y;
 104         int     x;
 105         int     y;
 106 };
 107
 108 struct nc_widget_label {
 109         struct nc_widget        widget;
 110         const char              *text;
 111 };
 112
 113 struct nc_widget_checkbox {
 114         struct nc_widget        widget;
 115         bool                    checked;
 116 };
 117
 118 struct nc_widget_textbox {
 119         struct nc_widgetset     *set;
 120         struct nc_widget        widget;
 121 };
 122
 123 struct nc_widget_subset {
 124         struct nc_widget        widget;
 125         int                     *active;
 126         int                     n_active;
 127         struct subset_option {
 128                 char            *str;
 129                 int             val;
 130                 FIELD           *field;
 131         } *options;
 132         int                     n_options;
 133         int                     top, left, size;
 134         struct nc_widgetset     *set;
 135         void                    (*on_change)(void *, int);
 136         void                    *on_change_arg;
 137         void                    (*screen_cb)(void *,
 138                                         struct nc_widget_subset *, int);
 139 };
 140
 141 struct nc_widget_select {
 142         struct nc_widget        widget;
 143         struct select_option {
 144                 char            *str;
 145                 int             val;
 146                 FIELD           *field;
 147                 int             lines;
 148         } *options;
 149         int                     top, left, size;
 150         int                     n_options, selected_option;
 151         struct nc_widgetset     *set;
 152         void                    (*on_change)(void *, int);
 153         void                    *on_change_arg;
 154 };
 155
 156 struct nc_widget_button {
 157         struct nc_widget        widget;
 158         void                    (*click)(void *arg);
 159         void                    *arg;
 160 };
 161
 162 static void widgetset_add_field(struct nc_widgetset *set, FIELD *field);
 163 static void widgetset_remove_field(struct nc_widgetset *set, FIELD *field);
 164
 165 static bool key_is_select(int key)
 166 {
 167         return key == ' ' || key == '\r' || key == '\n' || key == KEY_ENTER;
 168 }
 169
 170 static bool process_key_nop(struct nc_widget *widget __attribute__((unused)),
 171                 FORM *form __attribute((unused)),
 172                 int key __attribute__((unused)))
 173 {
 174         return false;
 175 }
 176
 177 static void field_set_visible(FIELD *field, bool visible)
 178 {
 179         int opts = field_opts(field) & ~O_VISIBLE;
 180         if (visible)
 181                 opts |= O_VISIBLE;
 182         set_field_opts(field, opts);
 183 }
 184
 185 static bool field_visible(FIELD *field)
 186 {
 187         return (field_opts(field) & O_VISIBLE) == O_VISIBLE;
 188 }
 189
 190 static void field_move(FIELD *field, int y, int x)
 191 {
 192         move_field(field, y, x);
 193 }
 194
 195 static int label_destructor(void *ptr)
 196 {
 197         struct nc_widget_label *label = ptr;
 198         free_field(label->widget.field);
 199         return 0;
 200 }
 201
 202
 203 struct nc_widget_label *widget_new_label(struct nc_widgetset *set,
 204                 int y, int x, char *str)
 205 {
 206         struct nc_widget_label *label;
 207         FIELD *f;
 208         int len;
 209
 210         len = strlen(str);
 211
 212         label = talloc_zero(set, struct nc_widget_label);
 213         label->widget.height = 1;
 214         label->widget.width = len;
 215         label->widget.x = x;
 216         label->widget.y = y;
 217         label->widget.process_key = process_key_nop;
 218         label->widget.field = f = new_field(1, len, y, x, 0, 0);
 219         label->widget.focussed_attr = A_NORMAL;
 220         label->widget.unfocussed_attr = A_NORMAL;
 221
 222         field_opts_off(f, O_ACTIVE);
 223         set_field_buffer(f, 0, str);
 224         set_field_userptr(f, &label->widget);
 225
 226         widgetset_add_field(set, label->widget.field);
 227         talloc_set_destructor(label, label_destructor);
 228
 229         return label;
 230 }
 231
 232 bool widget_checkbox_get_value(struct nc_widget_checkbox *checkbox)
 233 {
 234         return checkbox->checked;
 235 }
 236
 237 static void checkbox_set_buffer(struct nc_widget_checkbox *checkbox)
 238 {
 239         const char *str;
 240         str = checkbox->checked ? checkbox_checked_str : checkbox_unchecked_str;
 241         set_field_buffer(checkbox->widget.field, 0, str);
 242 }
 243
 244 static bool checkbox_process_key(struct nc_widget *widget,
 245                 FORM *form __attribute__((unused)), int key)
 246 {
 247         struct nc_widget_checkbox *checkbox = to_checkbox(widget);
 248
 249         if (!key_is_select(key))
 250                 return false;
 251
 252         checkbox->checked = !checkbox->checked;
 253         checkbox_set_buffer(checkbox);
 254
 255         return true;
 256 }
 257
 258 static int checkbox_destructor(void *ptr)
 259 {
 260         struct nc_widget_checkbox *checkbox = ptr;
 261         free_field(checkbox->widget.field);
 262         return 0;
 263 }
 264
 265 struct nc_widget_checkbox *widget_new_checkbox(struct nc_widgetset *set,
 266                 int y, int x, bool checked)
 267 {
 268         struct nc_widget_checkbox *checkbox;
 269         FIELD *f;
 270
 271         checkbox = talloc_zero(set, struct nc_widget_checkbox);
 272         checkbox->checked = checked;
 273         checkbox->widget.height = 1;
 274         checkbox->widget.width = strlen(checkbox_checked_str);
 275         checkbox->widget.x = x;
 276         checkbox->widget.y = y;
 277         checkbox->widget.process_key = checkbox_process_key;
 278         checkbox->widget.focussed_attr = A_REVERSE;
 279         checkbox->widget.unfocussed_attr = A_NORMAL;
 280         checkbox->widget.field = f = new_field(1, strlen(checkbox_checked_str),
 281                         y, x, 0, 0);
 282
 283         field_opts_off(f, O_EDIT);
 284         set_field_userptr(f, &checkbox->widget);
 285         checkbox_set_buffer(checkbox);
 286
 287         widgetset_add_field(set, checkbox->widget.field);
 288         talloc_set_destructor(checkbox, checkbox_destructor);
 289
 290         return checkbox;
 291 }
 292
 293 static char *strip_string(char *str)
 294 {
 295         int len, i;
 296
 297         len = strlen(str);
 298
 299         /* clear trailing space */
 300         for (i = len - 1; i >= 0; i--) {
 301                 if (!isspace(str[i]))
 302                         break;
 303                 str[i] = '\0';
 304         }
 305
 306         /* increment str past leading space */
 307         for (i = 0; i < len; i++) {
 308                 if (str[i] == '\0' || !isspace(str[i]))
 309                         break;
 310         }
 311
 312         return str + i;
 313 }
 314
 315 char *widget_textbox_get_value(struct nc_widget_textbox *textbox)
 316 {
 317         char *str = field_buffer(textbox->widget.field, 0);
 318         return str ? strip_string(str) : NULL;
 319 }
 320
 321 static bool textbox_process_key(
 322                 struct nc_widget *widget __attribute__((unused)),
 323                 FORM *form, int key)
 324 {
 325         switch (key) {
 326         case KEY_HOME:
 327                 form_driver(form, REQ_BEG_FIELD);
 328                 break;
 329         case KEY_END:
 330                 form_driver(form, REQ_END_FIELD);
 331                 break;
 332         case KEY_LEFT:
 333                 form_driver(form, REQ_LEFT_CHAR);
 334                 break;
 335         case KEY_RIGHT:
 336                 form_driver(form, REQ_RIGHT_CHAR);
 337                 break;
 338         case KEY_BACKSPACE:
 339                 if (form_driver(form, REQ_LEFT_CHAR) != E_OK)
 340                         break;
 341                 /* fall through */
 342         case KEY_DC:
 343                 form_driver(form, REQ_DEL_CHAR);
 344                 break;
 345         case '\t':
 346         case KEY_BTAB:
 347         case KEY_UP:
 348         case KEY_DOWN:
 349         case KEY_PPAGE:
 350         case KEY_NPAGE:
 351                 /* Don't catch navigational keys */
 352                 return false;
 353         default:
 354                 form_driver(form, key);
 355                 break;
 356         }
 357
 358         return true;
 359 }
 360
 361 static int textbox_destructor(void *ptr)
 362 {
 363         struct nc_widget_textbox *textbox = ptr;
 364         free_field(textbox->widget.field);
 365         return 0;
 366 }
 367
 368 struct nc_widget_textbox *widget_new_textbox(struct nc_widgetset *set,
 369                 int y, int x, int len, char *str)
 370 {
 371         struct nc_widget_textbox *textbox;
 372         FIELD *f;
 373
 374         textbox = talloc_zero(set, struct nc_widget_textbox);
 375         textbox->set = set;
 376         textbox->widget.height = 1;
 377         textbox->widget.width = len;
 378         textbox->widget.x = x;
 379         textbox->widget.y = y;
 380         textbox->widget.process_key = textbox_process_key;
 381         textbox->widget.field = f = new_field(1, len, y, x, 0, 0);
 382         textbox->widget.focussed_attr = A_REVERSE;
 383         textbox->widget.unfocussed_attr = A_UNDERLINE;
 384
 385         field_opts_off(f, O_STATIC | O_WRAP | O_BLANK);
 386         set_field_buffer(f, 0, str);
 387         set_field_back(f, textbox->widget.unfocussed_attr);
 388         set_field_userptr(f, &textbox->widget);
 389
 390         widgetset_add_field(set, textbox->widget.field);
 391         talloc_set_destructor(textbox, textbox_destructor);
 392
 393         return textbox;
 394 }
 395
 396 void widget_textbox_set_fixed_size(struct nc_widget_textbox *textbox)
 397 {
 398         field_opts_on(textbox->widget.field, O_STATIC);
 399 }
 400
 401 void widget_textbox_set_validator_integer(struct nc_widget_textbox *textbox,
 402                 long min, long max)
 403 {
 404         set_field_type(textbox->widget.field, TYPE_INTEGER, 1, min, max);
 405 }
 406
 407 static bool check_url_field(FIELD *field,
 408                 const void *arg __attribute__((unused)))
 409 {
 410         return is_url(field_buffer(field, 0));
 411 }
 412
 413 void widget_textbox_set_validator_url(struct nc_widget_textbox *textbox)
 414 {
 415         if (!textbox->set->url_type)
 416                 textbox->set->url_type = new_fieldtype(check_url_field, NULL);
 417
 418         set_field_type(textbox->widget.field, textbox->set->url_type);
 419 }
 420
 421 static bool check_ip_field(FIELD *field,
 422                 const void *arg __attribute__((unused)))
 423 {
 424         char *str;
 425         int rc;
 426
 427         str = strip_string(field_buffer(field, 0));
 428
 429         rc = addr_scheme(str);
 430
 431         return (rc == AF_INET || rc == AF_INET6);
 432 }
 433
 434
 435 static bool check_ipv6_multi_char(int c)
 436 {
 437         return isdigit(c) || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F') ||
 438                c == ':' || c == ' ';
 439 }
 440
 441 static bool check_ipv4_multi_char(int c)
 442 {
 443         return isdigit(c) || c == '.' || c == ' ';
 444 }
 445
 446 static bool check_ip_multi_field(FIELD *field,
 447                 const void *arg __attribute__((unused)))
 448 {
 449         char *buf, *tok, *saveptr;
 450         bool result;
 451         int type;
 452
 453         /* Use strdup directly since we can't easily reach a talloc parent */
 454         buf = strdup(strip_string(field_buffer(field, 0)));
 455         if (!buf)
 456                 /* We tried */
 457                 return true;
 458
 459         result = false;
 460         tok = strtok_r(buf, " ", &saveptr);
 461         if (!tok || *tok == '\0')
 462                 goto err;
 463
 464         while (tok) {
 465                 type = addr_scheme(tok);
 466                 if (!(type == AF_INET || type == AF_INET6))
 467                         goto err;
 468
 469                 tok = strtok_r(NULL, " ", &saveptr);
 470         }
 471         result = true;
 472
 473 err:
 474         free(buf);
 475         return result;
 476 }
 477
 478 static bool check_ip_multi_char(int c, const void *arg __attribute__((unused)))
 479 {
 480         return (check_ipv4_multi_char(c) || check_ipv6_multi_char(c));
 481 }
 482
 483 void widget_textbox_set_validator_ip(struct nc_widget_textbox *textbox)
 484 {
 485         if (!textbox->set->ip_type) {
 486                 textbox->set->ip_type = new_fieldtype(check_ip_field, NULL);
 487         }
 488         set_field_type(textbox->widget.field, textbox->set->ip_type);
 489 }
 490
 491 /*
 492  * In a perfect world we would use link_fieldtype() but segfaults do not
 493  * enhance the user experience.
 494  */
 495 void widget_textbox_set_validator_ip_multi(struct nc_widget_textbox *textbox)
 496 {
 497         if (!textbox->set->ip_multi_type) {
 498                 textbox->set->ip_multi_type = new_fieldtype(
 499                                                 check_ip_multi_field,
 500                                                 check_ip_multi_char);
 501         }
 502         set_field_type(textbox->widget.field, textbox->set->ip_multi_type);
 503 }
 504
 505 static void subset_update_order(struct nc_widget_subset *subset)
 506 {
 507         char *str;
 508         int i, val;
 509
 510         for (i = 0; i < subset->n_active; i++) {
 511                 val = subset->active[i];
 512                 str = talloc_asprintf(subset, "(%d) %s",
 513                                       i, subset->options[val].str);
 514                 set_field_buffer(subset->options[val].field, 0,
 515                                  str);
 516                 talloc_free(str);
 517         }
 518 }
 519
 520 static void widget_focus_change(struct nc_widget *widget, FIELD *field,
 521                 bool focussed);
 522
 523 static void subset_delete_active(struct nc_widget_subset *subset, int idx)
 524 {
 525         bool last = idx == (subset->n_active - 1);
 526         struct nc_widgetset *set = subset->set;
 527         struct nc_widget *widget;
 528         size_t rem;
 529         int i, val;
 530         uint32_t opts;
 531
 532         /* Shift field focus to nearest active option or next visible field */
 533         if (subset->n_active > 1) {
 534                 if (last)
 535                         val = subset->active[idx - 1];
 536                 else
 537                         val = subset->active[idx + 1];
 538                 set->cur_field = subset->options[val].field;
 539         } else {
 540                 for (i = 0; i < set->n_fields; i++)
 541                         if (field_visible(set->fields[i])) {
 542                                 opts = field_opts(set->fields[i]);
 543                                 if ((opts & O_ACTIVE) == O_ACTIVE) {
 544                                         set->cur_field = set->fields[i];
 545                                         break;
 546                                 }
 547                         }
 548         }
 549
 550         set_current_field(set->form, set->cur_field);
 551         widget = field_userptr(set->cur_field);
 552         widget_focus_change(widget, set->cur_field, true);
 553         if (set->widget_focus)
 554                 set->widget_focus(widget, set->widget_focus_arg);
 555
 556         /* Update active array */
 557         rem = sizeof(int) * (subset->n_active - idx - 1);
 558         val = subset->active[idx];
 559         field_set_visible(subset->options[val].field, false);
 560         if (rem)
 561                 memmove(&subset->active[idx], &subset->active[idx + 1], rem);
 562         subset->n_active--;
 563         subset->active = talloc_realloc(subset, subset->active,
 564                                          int, subset->n_active);
 565
 566         subset->widget.height = subset->n_active;
 567 }
 568
 569 static bool subset_process_key(struct nc_widget *w, FORM *form, int key)
 570 {
 571         struct nc_widget_subset *subset = to_subset(w);
 572         int i, val, opt_idx = -1;
 573         FIELD *field;
 574
 575         if (key != '-' && key != '+' && key != KEY_DC && key != KEY_BACKSPACE)
 576                 return false;
 577
 578         field = current_field(form);
 579
 580         for (i = 0; i < subset->n_active; i++) {
 581                 val = subset->active[i];
 582                 if (subset->options[val].field == field) {
 583                         opt_idx = i;
 584                         break;
 585                 }
 586         }
 587
 588         if (opt_idx < 0)
 589                 return false;
 590
 591         if (key == KEY_DC || key == KEY_BACKSPACE)
 592                 subset_delete_active(subset, opt_idx);
 593
 594         if (key == '-') {
 595                 if (opt_idx == 0)
 596                         return true;
 597
 598                 val = subset->active[opt_idx];
 599                 subset->active[opt_idx] = subset->active[opt_idx - 1];
 600                 subset->active[opt_idx - 1] = val;
 601         }
 602
 603         if (key == '+') {
 604                 if (opt_idx >= subset->n_active - 1)
 605                         return true;
 606
 607                 val = subset->active[opt_idx];
 608                 subset->active[opt_idx] = subset->active[opt_idx + 1];
 609                 subset->active[opt_idx + 1] = val;
 610         }
 611
 612         subset_update_order(subset);
 613
 614         if (subset->on_change)
 615                 subset->on_change(subset->on_change_arg, 0);
 616
 617         return true;
 618 }
 619
 620 static void subset_set_visible(struct nc_widget *widget, bool visible)
 621 {
 622         struct nc_widget_subset *subset = to_subset(widget);
 623         int i, val;
 624
 625         for (i = 0; i < subset->n_active; i++) {
 626                 val = subset->active[i];
 627                 field_set_visible(subset->options[val].field, visible);
 628         }
 629 }
 630
 631 static void subset_move(struct nc_widget *widget, int y, int x)
 632 {
 633         struct nc_widget_subset *subset = to_subset(widget);
 634         int i, val;
 635
 636         for (i = 0; i < subset->n_active; i++) {
 637                 val = subset->active[i];
 638                 field_move(subset->options[val].field, y + i , x);
 639         }
 640 }
 641
 642 static void subset_field_focus(struct nc_widget *widget, FIELD *field)
 643 {
 644         struct nc_widget_subset *subset = to_subset(widget);
 645         int i, val;
 646
 647         for (i = 0; i < subset->n_active; i++) {
 648                 val = subset->active[i];
 649                 if (field == subset->options[val].field) {
 650                         widget->focus_y = i;
 651                         return;
 652                 }
 653         }
 654 }
 655
 656 static int subset_destructor(void *ptr)
 657 {
 658         struct nc_widget_subset *subset = ptr;
 659         int i;
 660
 661         for (i = 0; i < subset->n_options; i++)
 662                 free_field(subset->options[i].field);
 663
 664         return 0;
 665 }
 666
 667 struct nc_widget_subset *widget_new_subset(struct nc_widgetset *set,
 668                 int y, int x, int len, void *screen_cb)
 669 {
 670         struct nc_widget_subset *subset;
 671
 672         subset = talloc_zero(set, struct nc_widget_subset);
 673         subset->widget.width = len;
 674         subset->widget.height = 0;
 675         subset->widget.x = x;
 676         subset->widget.y = y;
 677         subset->widget.process_key = subset_process_key;
 678         subset->widget.set_visible = subset_set_visible;
 679         subset->widget.move = subset_move;
 680         subset->widget.field_focus = subset_field_focus;
 681         subset->widget.focussed_attr = A_REVERSE;
 682         subset->widget.unfocussed_attr = A_NORMAL;
 683         subset->top = y;
 684         subset->left = x;
 685         subset->size = len;
 686         subset->set = set;
 687         subset->n_active = subset->n_options = 0;
 688         subset->active = NULL;
 689         subset->options = NULL;
 690         subset->screen_cb = screen_cb;
 691
 692         talloc_set_destructor(subset, subset_destructor);
 693
 694         return subset;
 695 }
 696
 697 void widget_subset_add_option(struct nc_widget_subset *subset, const char *text)
 698 {
 699         FIELD *f;
 700         int i;
 701
 702         i = subset->n_options++;
 703         subset->options = talloc_realloc(subset, subset->options,
 704                                          struct subset_option, i + 1);
 705
 706         subset->options[i].str = talloc_strdup(subset->options, text);
 707
 708         subset->options[i].field = f = new_field(1, subset->size, subset->top + i,
 709                                                  subset->left, 0, 0);
 710
 711         field_opts_off(f, O_WRAP | O_EDIT);
 712         set_field_userptr(f, &subset->widget);
 713         set_field_buffer(f, 0, subset->options[i].str);
 714         field_set_visible(f, false);
 715         widgetset_add_field(subset->set, f);
 716 }
 717
 718 void widget_subset_make_active(struct nc_widget_subset *subset, int idx)
 719 {
 720         int i;
 721
 722         for (i = 0; i < subset->n_active; i++)
 723                 if (subset->active[i] == idx) {
 724                         pb_debug("%s: Index %d already active\n", __func__, idx);
 725                         return;
 726                 }
 727
 728         i = subset->n_active++;
 729         subset->widget.height = subset->n_active;
 730         subset->active = talloc_realloc(subset, subset->active,
 731                                         int, i + 1);
 732         subset->active[i] = idx;
 733
 734         subset_update_order(subset);
 735 }
 736
 737 int widget_subset_get_order(void *ctx, unsigned int **order,
 738                 struct nc_widget_subset *subset)
 739 {
 740         unsigned int *buf = talloc_array(ctx, unsigned int, subset->n_active);
 741         int i;
 742
 743         for (i = 0; i < subset->n_active; i++)
 744                 buf[i] = subset->active[i];
 745
 746         *order = buf;
 747         return i;
 748 }
 749
 750 void widget_subset_show_inactive(struct nc_widget_subset *subset,
 751                 struct nc_widget_select *select)
 752 {
 753         bool active = false, first = true;
 754         int i, j;
 755
 756         for (i = 0; i < subset->n_options; i++) {
 757                 active = false;
 758                 for (j = 0; j < subset->n_active; j++)
 759                         if (subset->active[j] == i)
 760                                 active = true;
 761
 762                 if (active)
 763                         continue;
 764
 765                 widget_select_add_option(select, i,
 766                                          subset->options[i].str, first);
 767                 if (first)
 768                         first = false;
 769         }
 770 }
 771
 772 int widget_subset_n_inactive(struct nc_widget_subset *subset)
 773 {
 774         return subset->n_options - subset->n_active;
 775 }
 776
 777 int widget_subset_height(struct nc_widget_subset *subset)
 778 {
 779         return subset->n_active;
 780 }
 781
 782 void widget_subset_on_change(struct nc_widget_subset *subset,
 783                 void (*on_change)(void *, int), void *arg)
 784 {
 785         subset->on_change = on_change;
 786         subset->on_change_arg = arg;
 787 }
 788
 789 void widget_subset_drop_options(struct nc_widget_subset *subset)
 790 {
 791         struct nc_widgetset *set = subset->set;
 792         int i;
 793
 794         for (i = 0; i < subset->n_options; i++) {
 795                 FIELD *field = subset->options[i].field;
 796                 widgetset_remove_field(set, field);
 797                 if (field == set->cur_field)
 798                         set->cur_field = NULL;
 799                 free_field(subset->options[i].field);
 800         }
 801
 802         talloc_free(subset->options);
 803         talloc_free(subset->active);
 804         subset->options = NULL;
 805         subset->active = NULL;
 806         subset->n_options = 0;
 807         subset->n_active = 0;
 808         subset->widget.height = 0;
 809         subset->widget.focus_y = 0;
 810 }
 811
 812 void widget_subset_clear_active(struct nc_widget_subset *subset)
 813 {
 814         int i;
 815
 816         for (i = 0; i < subset->n_options; i++)
 817                 field_set_visible(subset->options[i].field, false);
 818
 819         talloc_free(subset->active);
 820         subset->active = NULL;
 821         subset->n_active = 0;
 822         subset->widget.height = 0;
 823         subset->widget.focus_y = 0;
 824 }
 825
 826 void widget_subset_callback(void *arg,
 827                 struct nc_widget_subset *subset, int idx)
 828 {
 829         subset->screen_cb(arg, subset, idx);
 830 }
 831
 832 static void select_option_change(struct select_option *opt, bool selected)
 833 {
 834         const char *str;
 835
 836         str = selected ? select_selected_str : select_unselected_str;
 837
 838         memcpy(opt->str, str, strlen(str));
 839         set_field_buffer(opt->field, 0, opt->str);
 840 }
 841
 842 static bool select_process_key(struct nc_widget *w, FORM *form, int key)
 843 {
 844         struct nc_widget_select *select = to_select(w);
 845         struct select_option *new_opt, *old_opt;
 846         int i, new_idx;
 847         FIELD *field;
 848
 849         if (!key_is_select(key))
 850                 return false;
 851
 852         field = current_field(form);
 853         new_opt = NULL;
 854
 855         for (i = 0; i < select->n_options; i++) {
 856                 if (select->options[i].field == field) {
 857                         new_opt = &select->options[i];
 858                         new_idx = i;
 859                         break;
 860                 }
 861         }
 862
 863         if (!new_opt)
 864                 return true;
 865
 866         if (new_idx == select->selected_option)
 867                 return true;
 868
 869         old_opt = &select->options[select->selected_option];
 870
 871         select_option_change(old_opt, false);
 872         select_option_change(new_opt, true);
 873
 874         select->selected_option = new_idx;
 875
 876         if (select->on_change)
 877                 select->on_change(select->on_change_arg, new_opt->val);
 878
 879         return true;
 880 }
 881
 882 static void select_set_visible(struct nc_widget *widget, bool visible)
 883 {
 884         struct nc_widget_select *select = to_select(widget);
 885         int i;
 886
 887         for (i = 0; i < select->n_options; i++)
 888                 field_set_visible(select->options[i].field, visible);
 889 }
 890
 891 static void select_move(struct nc_widget *widget, int y, int x)
 892 {
 893         struct nc_widget_select *select = to_select(widget);
 894         int i, cur = 0;
 895
 896         for (i = 0; i < select->n_options; i++) {
 897                 field_move(select->options[i].field, y + cur, x);
 898                 cur += select->options[i].lines;
 899         }
 900 }
 901
 902 static void select_field_focus(struct nc_widget *widget, FIELD *field)
 903 {
 904         struct nc_widget_select *select = to_select(widget);
 905         int i, cur = 0;
 906
 907         for (i = 0; i < select->n_options; i++) {
 908                 if (field != select->options[i].field) {
 909                         cur += select->options[i].lines;
 910                         continue;
 911                 }
 912                 widget->focus_y = cur;
 913                 return;
 914         }
 915 }
 916
 917 static int select_destructor(void *ptr)
 918 {
 919         struct nc_widget_select *select = ptr;
 920         int i;
 921
 922         for (i = 0; i < select->n_options; i++)
 923                 free_field(select->options[i].field);
 924
 925         return 0;
 926 }
 927
 928 struct nc_widget_select *widget_new_select(struct nc_widgetset *set,
 929                 int y, int x, int len)
 930 {
 931         struct nc_widget_select *select;
 932
 933         select = talloc_zero(set, struct nc_widget_select);
 934         select->widget.width = len;
 935         select->widget.height = 0;
 936         select->widget.x = x;
 937         select->widget.y = y;
 938         select->widget.process_key = select_process_key;
 939         select->widget.set_visible = select_set_visible;
 940         select->widget.move = select_move;
 941         select->widget.field_focus = select_field_focus;
 942         select->widget.focussed_attr = A_REVERSE;
 943         select->widget.unfocussed_attr = A_NORMAL;
 944         select->top = y;
 945         select->left = x;
 946         select->size = len;
 947         select->set = set;
 948
 949         talloc_set_destructor(select, select_destructor);
 950
 951         return select;
 952 }
 953
 954 static int widget_select_fold_cb(void *arg, const char *buf, int len)
 955 {
 956         struct nc_widget_select *select = arg;
 957         char *line, *newstr, *padbuf = NULL;
 958         int i, pad;
 959
 960         if (!len)
 961                 return 0;
 962
 963         line = talloc_strndup(select->options, buf, len);
 964
 965         i = select->n_options - 1;
 966         pad = max(0, select->widget.width - strncols(line));
 967
 968         if (pad) {
 969                 padbuf = talloc_array(select->options, char, pad + 1);
 970                 memset(padbuf, ' ', pad);
 971                 padbuf[pad] = '\0';
 972         }
 973
 974         if (select->options[i].str)
 975                 newstr = talloc_asprintf_append(select->options[i].str,
 976                                                          "%s%s", line,
 977                                                          pad ? padbuf : "");
 978         else
 979                 newstr = talloc_asprintf(select->options, "%s%s", line,
 980                                                          pad ? padbuf : "");
 981
 982         select->options[i].str = newstr;
 983         select->options[i].lines++;
 984
 985         talloc_free(padbuf);
 986         talloc_free(line);
 987         return 0;
 988 }
 989
 990 void widget_select_add_option(struct nc_widget_select *select, int value,
 991                 const char *text, bool selected)
 992 {
 993         const char *str;
 994         char *full_text;
 995         FIELD *f;
 996         int i;
 997
 998         /* if we never see an option with selected set, we want the first
 999          * one to be selected */
1000         if (select->n_options == 0)
1001                 selected = true;
1002         else if (selected)
1003                 select_option_change(&select->options[select->selected_option],
1004                                         false);
1005
1006         if (selected) {
1007                 select->selected_option = select->n_options;
1008                 str = select_selected_str;
1009         } else
1010                 str = select_unselected_str;
1011
1012         i = select->n_options++;
1013         select->options = talloc_realloc(select, select->options,
1014                                 struct select_option, i + 2);
1015         select->options[i].val = value;
1016         select->options[i].lines = 0;
1017         select->options[i].str = NULL;
1018
1019         full_text = talloc_asprintf(select->options, "%s %s", str, text);
1020         fold_text(full_text, select->widget.width,
1021                   widget_select_fold_cb, select);
1022
1023         select->options[i].field = f = new_field(select->options[i].lines,
1024                                         select->size,
1025                                         select->top + select->widget.height,
1026                                         select->left, 0, 0);
1027
1028         select->widget.height += select->options[i].lines;
1029
1030         field_opts_off(f, O_EDIT);
1031         set_field_userptr(f, &select->widget);
1032         set_field_buffer(f, 0, select->options[i].str);
1033
1034         widgetset_add_field(select->set, f);
1035         talloc_free(full_text);
1036 }
1037
1038 int widget_select_get_value(struct nc_widget_select *select)
1039 {
1040         if (!select->n_options)
1041                 return -1;
1042         return select->options[select->selected_option].val;
1043 }
1044
1045 int widget_select_height(struct nc_widget_select *select)
1046 {
1047         return select->widget.height;
1048 }
1049
1050 void widget_select_on_change(struct nc_widget_select *select,
1051                 void (*on_change)(void *, int), void *arg)
1052 {
1053         select->on_change = on_change;
1054         select->on_change_arg = arg;
1055 }
1056
1057 void widget_select_drop_options(struct nc_widget_select *select)
1058 {
1059         struct nc_widgetset *set = select->set;
1060         int i;
1061
1062         for (i = 0; i < select->n_options; i++) {
1063                 FIELD *field = select->options[i].field;
1064                 widgetset_remove_field(set, field);
1065                 if (field == set->cur_field)
1066                         set->cur_field = NULL;
1067                 free_field(select->options[i].field);
1068         }
1069
1070         talloc_free(select->options);
1071         select->options = NULL;
1072         select->n_options = 0;
1073         select->widget.height = 0;
1074         select->widget.focus_y = 0;
1075
1076 }
1077
1078 static bool button_process_key(struct nc_widget *widget,
1079                 FORM *form __attribute__((unused)), int key)
1080 {
1081         struct nc_widget_button *button = to_button(widget);
1082
1083         if (!button->click)
1084                 return false;
1085
1086         if (!key_is_select(key))
1087                 return false;
1088
1089         button->click(button->arg);
1090         return true;
1091 }
1092
1093 static int button_destructor(void *ptr)
1094 {
1095         struct nc_widget_button *button = ptr;
1096         free_field(button->widget.field);
1097         return 0;
1098 }
1099
1100 struct nc_widget_button *widget_new_button(struct nc_widgetset *set,
1101                 int y, int x, int size, const char *str,
1102                 void (*click)(void *), void *arg)
1103 {
1104         struct nc_widget_button *button;
1105         int idx, len, pad1, pad2, bufsz;
1106         char *text;
1107         FIELD *f;
1108
1109         int field_size = size + 2;
1110
1111         button = talloc_zero(set, struct nc_widget_button);
1112         button->widget.height = 1;
1113         button->widget.width = field_size;
1114         button->widget.x = x;
1115         button->widget.y = y;
1116         button->widget.field = f = new_field(1, field_size, y, x, 0, 0);
1117         button->widget.process_key = button_process_key;
1118         button->widget.focussed_attr = A_REVERSE;
1119         button->widget.unfocussed_attr = A_NORMAL;
1120         button->click = click;
1121         button->arg = arg;
1122
1123         field_opts_off(f, O_EDIT);
1124         set_field_userptr(f, &button->widget);
1125
1126         /* Center str in the field. This depends on the number of columns used
1127          * by the string, not the number of chars in str */
1128         len = strncols(str);
1129         if (len <= size) {
1130                 idx = (field_size - len) / 2;
1131         } else {
1132                 idx = 1;
1133                 pb_log("Warning: '%s' %d columns wide "
1134                        "but button is %d columns wide\n",
1135                        str, len, size);
1136         }
1137
1138         pad1 = max(idx - 1, 0);
1139         pad2 = max(size - len - pad1, 0);
1140         bufsz = 1 + pad1 + strlen(str) + pad2 + 2;
1141
1142         text = talloc_array(button, char, bufsz);
1143         memset(text, ' ', bufsz);
1144         memcpy(text + idx, str, strlen(str));
1145         text[0] = '[';
1146         text[bufsz - 2] = ']';
1147         text[bufsz - 1] = '\0';
1148
1149         set_field_buffer(f, 0, text);
1150
1151         widgetset_add_field(set, button->widget.field);
1152         talloc_set_destructor(button, button_destructor);
1153
1154         return button;
1155 }
1156
1157 void widget_focus_change(struct nc_widget *widget, FIELD *field,
1158                 bool focussed)
1159 {
1160         int attr = focussed ? widget->focussed_attr : widget->unfocussed_attr;
1161         set_field_back(field, attr);
1162 }
1163
1164 bool widgetset_process_key(struct nc_widgetset *set, int key)
1165 {
1166         struct nc_widget *widget;
1167         FIELD *field, *tmp;
1168         int req = 0;
1169         bool tab;
1170
1171         field = current_field(set->form);
1172         assert(field);
1173
1174         widget = field_userptr(field);
1175
1176         if (widget->process_key)
1177                 if (widget->process_key(widget, set->form, key))
1178                         return true;
1179
1180         tab = false;
1181
1182         /* handle field change events */
1183         switch (key) {
1184         case KEY_BTAB:
1185                 tab = true;
1186                 /* fall through */
1187         case KEY_UP:
1188                 req = REQ_SPREV_FIELD;
1189                 break;
1190         case '\t':
1191                 tab = true;
1192                 /* fall through */
1193         case KEY_DOWN:
1194                 req = REQ_SNEXT_FIELD;
1195                 break;
1196         case KEY_PPAGE:
1197                 req = REQ_SFIRST_FIELD;
1198                 break;
1199         case KEY_NPAGE:
1200                 req = REQ_SLAST_FIELD;
1201                 break;
1202         case KEY_LEFT:
1203                 req = REQ_LEFT_FIELD;
1204                 break;
1205         case KEY_RIGHT:
1206                 req = REQ_RIGHT_FIELD;
1207                 break;
1208         }
1209
1210         if (req) {
1211                 widget_focus_change(widget, field, false);
1212                 form_driver(set->form, req);
1213
1214                 /* if we're doing a tabbed-field-change, skip until we
1215                  * see the next widget */
1216                 tmp = field;
1217                 field = current_field(set->form);
1218
1219                 for (; tab && tmp != field && field_userptr(field) == widget;) {
1220                         form_driver(set->form, req);
1221                         field = current_field(set->form);
1222                 }
1223
1224                 form_driver(set->form, REQ_END_FIELD);
1225                 widget = field_userptr(field);
1226                 widget_focus_change(widget, field, true);
1227                 if (widget->field_focus)
1228                         widget->field_focus(widget, field);
1229                 if (set->widget_focus)
1230                         set->widget_focus(widget, set->widget_focus_arg);
1231                 return true;
1232         }
1233
1234         return false;
1235 }
1236
1237 static int widgetset_destructor(void *ptr)
1238 {
1239         struct nc_widgetset *set = ptr;
1240         free_form(set->form);
1241         if (set->ip_type)
1242                 free_fieldtype(set->ip_type);
1243         if (set->ip_multi_type)
1244                 free_fieldtype(set->ip_multi_type);
1245         if (set->url_type)
1246                 free_fieldtype(set->url_type);
1247         return 0;
1248 }
1249
1250 struct nc_widgetset *widgetset_create(void *ctx, WINDOW *main, WINDOW *sub)
1251 {
1252         struct nc_widgetset *set;
1253
1254         set = talloc_zero(ctx, struct nc_widgetset);
1255         set->n_alloc_fields = 8;
1256         set->mainwin = main;
1257         set->subwin = sub;
1258         set->fields = talloc_array(set, FIELD *, set->n_alloc_fields);
1259         talloc_set_destructor(set, widgetset_destructor);
1260
1261         return set;
1262 }
1263
1264 void widgetset_set_windows(struct nc_widgetset *set,
1265                 WINDOW *main, WINDOW *sub)
1266 {
1267         set->mainwin = main;
1268         set->subwin = sub;
1269 }
1270
1271 void widgetset_set_widget_focus(struct nc_widgetset *set,
1272                 widget_focus_cb cb, void *arg)
1273 {
1274         set->widget_focus = cb;
1275         set->widget_focus_arg = arg;
1276 }
1277
1278 void widgetset_post(struct nc_widgetset *set)
1279 {
1280         struct nc_widget *widget;
1281         FIELD *field;
1282
1283         set->form = new_form(set->fields);
1284         set_form_win(set->form, set->mainwin);
1285         set_form_sub(set->form, set->subwin);
1286         post_form(set->form);
1287         form_driver(set->form, REQ_END_FIELD);
1288
1289         if (set->cur_field)
1290                 set_current_field(set->form, set->cur_field);
1291
1292         field = current_field(set->form);
1293         widget = field_userptr(field);
1294         widget_focus_change(widget, field, true);
1295         if (set->widget_focus)
1296                 set->widget_focus(widget, set->widget_focus_arg);
1297 }
1298
1299 void widgetset_unpost(struct nc_widgetset *set)
1300 {
1301         set->cur_field = current_field(set->form);
1302         unpost_form(set->form);
1303         free_form(set->form);
1304         set->form = NULL;
1305 }
1306
1307 static void widgetset_add_field(struct nc_widgetset *set, FIELD *field)
1308 {
1309         if (set->n_fields == set->n_alloc_fields - 1) {
1310                 set->n_alloc_fields *= 2;
1311                 set->fields = talloc_realloc(set, set->fields,
1312                                 FIELD *, set->n_alloc_fields);
1313         }
1314
1315         set->n_fields++;
1316         set->fields[set->n_fields - 1] = field;
1317         set->fields[set->n_fields] = NULL;
1318 }
1319
1320 static void widgetset_remove_field(struct nc_widgetset *set, FIELD *field)
1321 {
1322         int i;
1323
1324         for (i = 0; i < set->n_fields; i++) {
1325                 if (set->fields[i] == field)
1326                         break;
1327         }
1328
1329         if (i == set->n_fields)
1330                 return;
1331
1332         memmove(&set->fields[i], &set->fields[i+i],
1333                         (set->n_fields - i) * sizeof(set->fields[i]));
1334         set->n_fields--;
1335 }
1336
1337 #define DECLARE_BASEFN(type) \
1338         struct nc_widget *widget_ ## type ## _base              \
1339                 (struct nc_widget_ ## type *w)                  \
1340         { return &w->widget; }
1341
1342 DECLARE_BASEFN(textbox);
1343 DECLARE_BASEFN(checkbox);
1344 DECLARE_BASEFN(subset);
1345 DECLARE_BASEFN(select);
1346 DECLARE_BASEFN(label);
1347 DECLARE_BASEFN(button);
1348
1349 void widget_set_visible(struct nc_widget *widget, bool visible)
1350 {
1351         if (widget->set_visible)
1352                 widget->set_visible(widget, visible);
1353         else
1354                 field_set_visible(widget->field, visible);
1355 }
1356
1357 void widget_move(struct nc_widget *widget, int y, int x)
1358 {
1359         if (widget->move)
1360                 widget->move(widget, y, x);
1361         else
1362                 field_move(widget->field, y, x);
1363
1364         widget->x = x;
1365         widget->y = y;
1366
1367         if (x + widget->width > COLS)
1368                 pb_debug("%s: Widget at %d,%d runs over pad! (%d)", __func__,
1369                        y, x, x + widget->width);
1370 }
1371
1372 int widget_height(struct nc_widget *widget)
1373 {
1374         return widget->height;
1375 }
1376
1377 int widget_width(struct nc_widget *widget)
1378 {
1379         return widget->width;
1380 }
1381
1382 int widget_x(struct nc_widget *widget)
1383 {
1384         return widget->x;
1385 }
1386
1387 int widget_y(struct nc_widget *widget)
1388 {
1389         return widget->y;
1390 }
1391
1392 int widget_focus_y(struct nc_widget *widget)
1393 {
1394         return widget->focus_y;
1395 }
1396