src/input.c

   1 /* vim:tw=78:ts=8:sw=4:set ft=c:  */
   2 /*
   3     Copyright (C) 2002-2019 Ben Kibbey <bjk@luxsci.net>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18 */
  19 #ifdef HAVE_CONFIG_H
  20 #include <config.h>
  21 #endif
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <stdarg.h>
  27 #include <ctype.h>
  28
  29 #ifdef HAVE_STDARG_H
  30 #include <stdarg.h>
  31 #endif
  32
  33 #include "common.h"
  34 #include "conf.h"
  35 #include "colors.h"
  36 #include "window.h"
  37 #include "misc.h"
  38 #include "message.h"
  39 #include "input.h"
  40 #include "common.h"
  41 #include "keys.h"
  42 #include "rcfile.h"
  43
  44 static struct input_history_s
  45 {
  46   char *str;
  47   struct input_history_s *next;
  48   struct input_history_s *prev;
  49   struct input_history_s *head;
  50 } *input_history[INPUT_HIST_MAX];
  51
  52 static void
  53 add_input_history (int which, const char *str)
  54 {
  55   struct input_history_s *new;
  56   struct input_history_s *p = NULL;
  57
  58   if (!str || !*str || which < 0)
  59     return;
  60
  61   if (input_history[which])
  62     for (p = input_history[which]->head; p->next; p = p->next);
  63
  64   new = Calloc (1, sizeof (struct input_history_s));
  65   if (!new)
  66     {
  67       fprintf (stderr, "Out of core!\n");
  68       exit (EXIT_FAILURE);
  69     }
  70
  71   new->str = strdup (str);
  72   new->prev = p;
  73
  74   if (p)
  75     {
  76       p->next = new;
  77       new->head = p->head;
  78     }
  79   else
  80     new->head = new;
  81
  82   input_history[which] = p ? p->next : new;
  83 }
  84
  85 static bool
  86 validate_pgn_tag_name (int c, const void *arg)
  87 {
  88   if (!isalnum (c) && c != '_')
  89     return FALSE;
  90
  91   return TRUE;
  92 }
  93
  94 static bool
  95 validate_pgn_date (int c, const void *arg)
  96 {
  97   if (!isdigit (c) && c != '.' && c != '?')
  98     return FALSE;
  99
 100   return TRUE;
 101 }
 102
 103 static bool
 104 validate_pgn_round (int c, const void *arg)
 105 {
 106   if (!isdigit (c) && c != '.' && c != '-' && c != '?')
 107     return FALSE;
 108
 109   return TRUE;
 110 }
 111
 112 static bool
 113 validate_pgn_result (int c, const void *arg)
 114 {
 115   if (c != '1' && c != '0' && c != '2' && c != '*' && c != '/' && c != '-')
 116     return FALSE;
 117
 118   return TRUE;
 119 }
 120
 121 static int
 122 get_input (WIN * win)
 123 {
 124   struct input_s *in = win->data;
 125   char *tmp;
 126   struct input_data_s *data = in->data;
 127   int i, n;
 128   char *prompt = _("Type %ls for help");
 129   char buf[255];
 130   char str[MB_CUR_MAX];
 131
 132   snprintf (buf, sizeof (buf), prompt, key_lookup (global_keys, do_global_help));
 133   curs_set (1);
 134   window_draw_title (win->w, win->title, in->w, CP_INPUT_TITLE,
 135                      CP_INPUT_BORDER);
 136
 137   if (in->extra)
 138     {
 139       for (i = 0; in->extra[i]; i++)
 140         window_draw_prompt (win->w, in->lines + 2 + i, in->w, in->extra[i],
 141                             CP_INPUT_PROMPT);
 142
 143       window_draw_prompt (win->w, in->lines + 2 + i, in->w, buf,
 144                           CP_INPUT_PROMPT);
 145     }
 146   else
 147     window_draw_prompt (win->w, in->lines + 2, in->w, buf, CP_INPUT_PROMPT);
 148
 149   if (in->func && in->c && win->c == in->c)
 150     {
 151       (*in->func) (in);
 152       return 1;
 153     }
 154
 155   if (win->c == keycode_lookup (global_keys, do_global_help))
 156     {
 157       message (_("Line Editing Keys"), ANY_KEY_STR,
 158                "%s",
 159                _("UP/DOWN/LEFT/RIGHT - position cursor (multiline)\n"
 160                  "         UP/CTRL-P - previous input history\n"
 161                  "       DOWN/CTRL-N - next input history\n"
 162                  "       HOME/CTRL-A - move cursor to the beginning of line\n"
 163                  "        END/CTRL-E - move cursor to the end of line\n"
 164                  "          CTRL-B/W - move cursor to previous/next word\n"
 165                  "            CTRL-X - delete word under cursor\n"
 166                  "            CTRL-K - delete from cursor to end of line\n"
 167                  "            CTRL-U - clear entire input field\n"
 168                  "         BACKSPACE - delete previous character\n"
 169                  "            ESCAPE - quit without changes\n"
 170                  "             ENTER - quit with changes"));
 171       goto ok;
 172     }
 173
 174   switch (win->c)
 175     {
 176     case CTRL_KEY ('X'):
 177       form_driver (in->f, REQ_DEL_WORD);
 178       break;
 179     case CTRL_KEY ('B'):
 180       form_driver (in->f, REQ_PREV_WORD);
 181       break;
 182     case CTRL_KEY ('W'):
 183       form_driver (in->f, REQ_NEXT_WORD);
 184       break;
 185     case KEY_HOME:
 186     case CTRL_KEY ('A'):
 187       form_driver (in->f, REQ_BEG_LINE);
 188       break;
 189     case KEY_END:
 190     case CTRL_KEY ('E'):
 191       form_driver (in->f, REQ_END_LINE);
 192       break;
 193     case CTRL_KEY ('K'):
 194       form_driver (in->f, REQ_CLR_EOL);
 195       break;
 196     case CTRL_KEY ('U'):
 197       form_driver (in->f, REQ_CLR_FIELD);
 198       break;
 199     case KEY_LEFT:
 200       form_driver (in->f, REQ_LEFT_CHAR);
 201       break;
 202     case KEY_RIGHT:
 203       form_driver (in->f, REQ_RIGHT_CHAR);
 204       break;
 205     case CTRL_KEY ('P'):
 206     case KEY_UP:
 207       if (in->hist >= 0 && input_history[in->hist] && in->lines == 1)
 208         {
 209           set_field_buffer (in->fields[0], 0, input_history[in->hist]->str);
 210           form_driver (in->f, REQ_END_LINE);
 211
 212           if (!input_history[in->hist]->prev)
 213             input_history[in->hist] = input_history[in->hist]->head;
 214           else
 215             input_history[in->hist] = input_history[in->hist]->prev;
 216
 217           break;
 218         }
 219
 220       form_driver (in->f, REQ_UP_CHAR);
 221       break;
 222     case CTRL_KEY ('N'):
 223     case KEY_DOWN:
 224       if (in->hist >= 0 && input_history[in->hist] && in->lines == 1)
 225         {
 226           if (!input_history[in->hist]->next)
 227             {
 228               set_field_buffer (in->fields[0], 0, NULL);
 229               form_driver (in->f, REQ_CLR_FIELD);
 230               break;
 231             }
 232
 233           input_history[in->hist] = input_history[in->hist]->next;
 234           set_field_buffer (in->fields[0], 0, input_history[in->hist]->str);
 235           form_driver (in->f, REQ_END_LINE);
 236           break;
 237         }
 238
 239       form_driver (in->f, REQ_DOWN_CHAR);
 240       break;
 241     case '\010':
 242     case KEY_BACKSPACE:
 243       form_driver (in->f, REQ_DEL_PREV);
 244       break;
 245     case '\n':
 246       tmp = field_buffer (in->fields[0], 0);
 247       goto done;
 248     case KEY_ESCAPE:
 249       if (in->reset)
 250         tmp = NULL;
 251       else
 252         tmp = (in->buf[0]) ? in->buf : NULL;
 253       goto done;
 254     default:
 255       n = wctomb (str, win->c);
 256       for (i = 0; n != -1 && i < n; i++)
 257         form_driver (in->f, (unsigned char) str[i]);
 258       break;
 259     }
 260
 261 ok:
 262   form_driver (in->f, REQ_VALIDATION);
 263   return 1;
 264
 265 done:
 266   if (tmp)
 267     {
 268       tmp = trim (tmp);
 269
 270       if (tmp[0])
 271         {
 272           strncpy (in->buf, tmp, sizeof (in->buf) - 1);
 273           in->buf[sizeof (in->buf) - 1] = 0;
 274         }
 275       else
 276         in->buf[0] = 0;
 277     }
 278   else
 279     in->buf[0] = 0;
 280
 281   unpost_form (in->f);
 282   free_form (in->f);
 283   free_field (in->fields[0]);
 284
 285   if (in->extra)
 286     {
 287       for (i = 0; in->extra[i]; i++)
 288         free (in->extra[i]);
 289
 290       free (in->extra);
 291     }
 292
 293   data->str = (in->buf[0]) ? strdup (in->buf) : NULL;
 294
 295   if (in->lines == 1)
 296     add_input_history (in->hist, in->buf);
 297
 298   win->data = data;
 299   free_fieldtype (in->ft);
 300   free (in);
 301   curs_set (0);
 302   return 0;
 303 }
 304
 305 static void
 306 input_resize_func (WIN *w)
 307 {
 308   move_panel (w->p, CALCPOSY (w->rows), CALCPOSX (w->cols));
 309 }
 310
 311 /*
 312  * This function prompts for input. The init argument is the initial value.
 313  * The lines argument is how many lines the field is. If zero, then it is
 314  * dynamically determined based on the init argument or INPUT_WIDTH if init is
 315  * NULL.
 316  *
 317  * The reset argument is whether pressing ESC returns the initial value or
 318  * NULL.
 319  *
 320  * The extra_help argument is an extra line of help prompt normally used with
 321  * the custom_func argument. The custom_func argument is a pointer to a
 322  * function of type void which takes one pointer-to-void argument. This
 323  * function is called when the ckey argument is pressed.
 324  *
 325  * The efunc parameter is the function that is ran when the window is done
 326  * getting input or NULL. This function is ran just before the window is
 327  * destroyed.
 328  *
 329  * The type argument is the type of validation for the input defined in
 330  * common.h. Remaining arguments are values for the type argument. See
 331  * field_type(3X) for validation types.
 332  *
 333  * FIXME form validation is buggy (integers).
 334  */
 335 WIN *
 336 construct_input (const char *title, const char *init, int lines, int reset,
 337                  const char *extra_help, input_func * func, void *arg,
 338                  wint_t key, struct input_data_s * id, int history,
 339                  window_resize_func rfunc, int type, ...)
 340 {
 341   WIN *win;
 342   struct input_s *in;
 343   int l = (lines > 0) ? lines : 1;
 344   va_list ap;
 345   FIELDTYPE *ft = NULL;
 346   int eh = 0;
 347
 348   l += 2;
 349   in = Calloc (1, sizeof (struct input_s));
 350   in->w = INPUT_WIDTH;
 351
 352   if (extra_help)
 353     {
 354       char *tmp = strdup (extra_help);
 355
 356       in->extra = split_str (tmp, "\n", &eh, &in->w, 0);
 357       l += eh;
 358       free (tmp);
 359     }
 360
 361   if (title)
 362     l++;
 363
 364   in->h = l + 1;
 365   in->func = func;
 366   in->arg = arg;
 367   in->c = key;
 368   in->lines = (lines) ? lines : 1;
 369   win = window_create (title, in->h, in->w, CALCPOSY (in->h), CALCPOSX (in->w),
 370                        get_input, in, id->efunc,
 371                        rfunc ? rfunc : input_resize_func);
 372   in = win->data;
 373   in->hist = history;
 374   in->data = id;
 375   in->reset = reset;
 376   in->fields[0] = new_field (in->lines, in->w - 2, 0, 0, 0, 0);
 377   va_start (ap, type);
 378
 379   switch (type)
 380     {
 381     case FIELD_TYPE_PGN_ROUND:
 382       ft = new_fieldtype (NULL, validate_pgn_round);
 383       set_field_type (in->fields[0], ft);
 384       break;
 385     case FIELD_TYPE_PGN_RESULT:
 386       ft = new_fieldtype (NULL, validate_pgn_result);
 387       set_field_type (in->fields[0], ft);
 388       break;
 389     case FIELD_TYPE_PGN_DATE:
 390       ft = new_fieldtype (NULL, validate_pgn_date);
 391       set_field_type (in->fields[0], ft);
 392       break;
 393     case FIELD_TYPE_PGN_TAG_NAME:
 394       ft = new_fieldtype (NULL, validate_pgn_tag_name);
 395       set_field_type (in->fields[0], ft);
 396       break;
 397     case FIELD_TYPE_ALNUM:
 398       set_field_type (in->fields[0], TYPE_ALNUM, va_arg (ap, int));
 399       break;
 400     case FIELD_TYPE_ALPHA:
 401       set_field_type (in->fields[0], TYPE_ALPHA, va_arg (ap, int));
 402       break;
 403     case FIELD_TYPE_ENUM:
 404       set_field_type (in->fields[0], TYPE_ENUM, va_arg (ap, char **),
 405                       va_arg (ap, int), va_arg (ap, int));
 406       break;
 407     case FIELD_TYPE_INTEGER:
 408       set_field_type (in->fields[0], TYPE_INTEGER, va_arg (ap, int),
 409                       va_arg (ap, long), va_arg (ap, long));
 410       break;
 411     case FIELD_TYPE_NUMERIC:
 412       set_field_type (in->fields[0], TYPE_NUMERIC, va_arg (ap, int),
 413                       va_arg (ap, double), va_arg (ap, double));
 414       break;
 415     case FIELD_TYPE_REGEXP:
 416       set_field_type (in->fields[0], TYPE_REGEXP, va_arg (ap, char *));
 417       break;
 418 /* Solaris 5.9 */
 419 #ifdef HAVE_TYPE_IPV4
 420     case FIELD_TYPE_IPV4:
 421       set_field_type (in->fields[0], TYPE_IPV4);
 422       break;
 423 #endif
 424     default:
 425       set_field_type (in->fields[0], NULL);
 426       break;
 427     }
 428
 429   va_end (ap);
 430
 431   if (init)
 432     {
 433       strncpy (in->buf, init, sizeof (in->buf) - 1);
 434       in->buf[sizeof (in->buf) - 1] = 0;
 435       set_field_buffer (in->fields[0], 0, init);
 436     }
 437
 438   in->ft = ft;
 439
 440   if (in->lines == 1)
 441     field_opts_off (in->fields[0], O_STATIC);
 442
 443   if (in->buf[0])
 444     set_field_buffer (in->fields[0], 0, in->buf);
 445
 446   field_opts_off (in->fields[0], O_BLANK | O_AUTOSKIP);
 447   in->fields[1] = NULL;
 448   in->f = new_form (in->fields);
 449   form_opts_off (in->f, O_BS_OVERLOAD);
 450   set_form_win (in->f, win->w);
 451   in->sw = derwin (win->w, in->lines, in->w - 2, 2, 1);
 452   set_form_sub (in->f, in->sw);
 453   post_form (in->f);
 454   form_driver (in->f, REQ_END_FIELD);
 455   keypad (win->w, TRUE);
 456   curs_set (1);
 457   wbkgd (win->w, CP_INPUT_WINDOW);
 458   (*win->func) (win);
 459   return win;
 460 }