release/src/router/libncurses/test/edit_field.c

   1 /****************************************************************************
   2  * Copyright (c) 2003-2008,2011 Free Software Foundation, Inc.              *
   3  *                                                                          *
   4  * Permission is hereby granted, free of charge, to any person obtaining a  *
   5  * copy of this software and associated documentation files (the            *
   6  * "Software"), to deal in the Software without restriction, including      *
   7  * without limitation the rights to use, copy, modify, merge, publish,      *
   8  * distribute, distribute with modifications, sublicense, and/or sell       *
   9  * copies of the Software, and to permit persons to whom the Software is    *
  10  * furnished to do so, subject to the following conditions:                 *
  11  *                                                                          *
  12  * The above copyright notice and this permission notice shall be included  *
  13  * in all copies or substantial portions of the Software.                   *
  14  *                                                                          *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
  16  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
  18  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
  21  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
  22  *                                                                          *
  23  * Except as contained in this notice, the name(s) of the above copyright   *
  24  * holders shall not be used in advertising or otherwise to promote the     *
  25  * sale, use or other dealings in this Software without prior written       *
  26  * authorization.                                                           *
  27  ****************************************************************************/
  28 /*
  29  * $Id: edit_field.c,v 1.17 2011/01/15 18:15:11 tom Exp $
  30  *
  31  * A wrapper for form_driver() which keeps track of the user's editing changes
  32  * for each field, and makes the result available as a null-terminated string
  33  * in field_buffer(field,1).
  34  *
  35  * Thomas Dickey - 2003/4/26.
  36  */
  37
  38 #include <test.priv.h>
  39
  40 #if USE_LIBFORM
  41
  42 #include <edit_field.h>
  43
  44 static struct {
  45     int code;
  46     int result;
  47     const char *help;
  48 } commands[] = {
  49
  50     {
  51         CTRL('A'), REQ_NEXT_CHOICE, ""
  52     },
  53     {
  54         CTRL('B'), REQ_PREV_WORD, "go to previous word"
  55     },
  56     {
  57         CTRL('C'), REQ_CLR_EOL, "clear to end of line"
  58     },
  59     {
  60         CTRL('D'), REQ_DOWN_FIELD, "move downward to field"
  61     },
  62     {
  63         CTRL('E'), REQ_END_FIELD, "go to end of field"
  64     },
  65     {
  66         CTRL('F'), REQ_NEXT_PAGE, "go to next page"
  67     },
  68     {
  69         CTRL('G'), REQ_DEL_WORD, "delete current word"
  70     },
  71     {
  72         CTRL('H'), REQ_DEL_PREV, "delete previous character"
  73     },
  74     {
  75         CTRL('I'), REQ_INS_CHAR, "insert character"
  76     },
  77     {
  78         CTRL('K'), REQ_CLR_EOF, "clear to end of field"
  79     },
  80     {
  81         CTRL('L'), REQ_LEFT_FIELD, "go to field to left"
  82     },
  83     {
  84         CTRL('M'), REQ_NEW_LINE, "insert/overlay new line"
  85     },
  86     {
  87         CTRL('N'), REQ_NEXT_FIELD, "go to next field"
  88     },
  89     {
  90         CTRL('O'), REQ_INS_LINE, "insert blank line at cursor"
  91     },
  92     {
  93         CTRL('P'), REQ_PREV_FIELD, "go to previous field"
  94     },
  95     {
  96         CTRL('Q'), MY_QUIT, "exit form"
  97     },
  98     {
  99         CTRL('R'), REQ_RIGHT_FIELD, "go to field to right"
 100     },
 101     {
 102         CTRL('S'), REQ_BEG_FIELD, "go to beginning of field"
 103     },
 104     {
 105         CTRL('T'), MY_EDT_MODE, "toggle O_EDIT mode, clear field status",
 106     },
 107     {
 108         CTRL('U'), REQ_UP_FIELD, "move upward to field"
 109     },
 110     {
 111         CTRL('V'), REQ_DEL_CHAR, "delete character"
 112     },
 113     {
 114         CTRL('W'), REQ_NEXT_WORD, "go to next word"
 115     },
 116     {
 117         CTRL('X'), REQ_CLR_FIELD, "clear field"
 118     },
 119     {
 120         CTRL('Y'), REQ_DEL_LINE, "delete line"
 121     },
 122     {
 123         CTRL('Z'), REQ_PREV_CHOICE, ""
 124     },
 125     {
 126         CTRL('['), MY_QUIT, "exit form"
 127     },
 128     {
 129         CTRL(']'), MY_INS_MODE, "toggle REQ_INS_MODE/REQ_OVL_MODE",
 130     },
 131     {
 132         KEY_F(1), MY_HELP, "show this screen",
 133     },
 134     {
 135         KEY_BACKSPACE, REQ_DEL_PREV, "delete previous character"
 136     },
 137     {
 138         KEY_DOWN, REQ_DOWN_CHAR, "move down 1 character"
 139     },
 140     {
 141         KEY_END, REQ_LAST_FIELD, "go to last field"
 142     },
 143     {
 144         KEY_HOME, REQ_FIRST_FIELD, "go to first field"
 145     },
 146     {
 147         KEY_LEFT, REQ_LEFT_CHAR, "move left 1 character"
 148     },
 149     {
 150         KEY_LL, REQ_LAST_FIELD, "go to last field"
 151     },
 152     {
 153         KEY_NEXT, REQ_NEXT_FIELD, "go to next field"
 154     },
 155     {
 156         KEY_NPAGE, REQ_NEXT_PAGE, "go to next page"
 157     },
 158     {
 159         KEY_PPAGE, REQ_PREV_PAGE, "go to previous page"
 160     },
 161     {
 162         KEY_PREVIOUS, REQ_PREV_FIELD, "go to previous field"
 163     },
 164     {
 165         KEY_RIGHT, REQ_RIGHT_CHAR, "move right 1 character"
 166     },
 167     {
 168         KEY_UP, REQ_UP_CHAR, "move up 1 character"
 169     }
 170 };
 171
 172 static WINDOW *old_window;
 173
 174 static void
 175 begin_popup(void)
 176 {
 177     doupdate();
 178     old_window = dupwin(curscr);
 179 }
 180
 181 static void
 182 end_popup(void)
 183 {
 184     touchwin(old_window);
 185     wnoutrefresh(old_window);
 186     doupdate();
 187     delwin(old_window);
 188 }
 189
 190 /*
 191  * Display a temporary window listing the keystroke-commands we recognize.
 192  */
 193 void
 194 help_edit_field(void)
 195 {
 196     int x0 = 4;
 197     int y0 = 2;
 198     int y1 = 0;
 199     int y2 = 0;
 200     int wide = COLS - ((x0 + 1) * 2);
 201     int high = LINES - ((y0 + 1) * 2);
 202     WINDOW *help = newwin(high, wide, y0, x0);
 203     WINDOW *data = newpad(2 + SIZEOF(commands), wide - 4);
 204     unsigned n;
 205     int ch = ERR;
 206
 207     begin_popup();
 208
 209     keypad(help, TRUE);
 210     keypad(data, TRUE);
 211     waddstr(data, "Defined form edit/traversal keys:\n");
 212     for (n = 0; n < SIZEOF(commands); ++n) {
 213         const char *name;
 214 #ifdef NCURSES_VERSION
 215         if ((name = form_request_name(commands[n].result)) == 0)
 216 #endif
 217             name = commands[n].help;
 218         wprintw(data, "%s -- %s\n",
 219                 keyname(commands[n].code),
 220                 name != 0 ? name : commands[n].help);
 221     }
 222     waddstr(data, "Arrow keys move within a field as you would expect.");
 223     y2 = getcury(data);
 224
 225     do {
 226         switch (ch) {
 227         case KEY_HOME:
 228             y1 = 0;
 229             break;
 230         case KEY_END:
 231             y1 = y2;
 232             break;
 233         case KEY_PREVIOUS:
 234         case KEY_PPAGE:
 235             if (y1 > 0) {
 236                 y1 -= high / 2;
 237                 if (y1 < 0)
 238                     y1 = 0;
 239             } else {
 240                 beep();
 241             }
 242             break;
 243         case KEY_NEXT:
 244         case KEY_NPAGE:
 245             if (y1 < y2) {
 246                 y1 += high / 2;
 247                 if (y1 >= y2)
 248                     y1 = y2;
 249             } else {
 250                 beep();
 251             }
 252             break;
 253         case CTRL('P'):
 254         case KEY_UP:
 255             if (y1 > 0)
 256                 --y1;
 257             else
 258                 beep();
 259             break;
 260         case CTRL('N'):
 261         case KEY_DOWN:
 262             if (y1 < y2)
 263                 ++y1;
 264             else
 265                 beep();
 266             break;
 267         default:
 268             beep();
 269             break;
 270         case ERR:
 271             break;
 272         }
 273         werase(help);
 274         box(help, 0, 0);
 275         wnoutrefresh(help);
 276         pnoutrefresh(data, y1, 0, y0 + 1, x0 + 1, high, wide);
 277         doupdate();
 278     } while ((ch = wgetch(data)) != ERR && ch != QUIT && ch != ESCAPE);
 279     werase(help);
 280     wrefresh(help);
 281     delwin(help);
 282     delwin(data);
 283
 284     end_popup();
 285 }
 286
 287 static int
 288 offset_in_field(FORM * form)
 289 {
 290     FIELD *field = current_field(form);
 291     int currow, curcol;
 292
 293     form_getyx(form, currow, curcol);
 294     return curcol + currow * field->dcols;
 295 }
 296
 297 static void
 298 inactive_field(FIELD * f)
 299 {
 300     FieldAttrs *ptr = (FieldAttrs *) field_userptr(f);
 301     set_field_back(f, ptr->background);
 302 }
 303
 304 int
 305 edit_field(FORM * form, int *result)
 306 {
 307     int ch = wgetch(form_win(form));
 308     int status;
 309     FIELD *before;
 310     unsigned n;
 311     char lengths[80];
 312     int length;
 313     char *buffer;
 314     int before_row;
 315     int before_col;
 316     int before_off = offset_in_field(form);
 317
 318     form_getyx(form, before_row, before_col);
 319     before = current_field(form);
 320     set_field_back(before, A_NORMAL);
 321     if (ch <= KEY_MAX) {
 322         set_field_back(before, A_REVERSE);
 323     } else if (ch <= MAX_FORM_COMMAND) {
 324         inactive_field(before);
 325     }
 326
 327     *result = ch;
 328     for (n = 0; n < SIZEOF(commands); ++n) {
 329         if (commands[n].code == ch) {
 330             *result = commands[n].result;
 331             break;
 332         }
 333     }
 334
 335     status = form_driver(form, *result);
 336
 337     if (status == E_OK) {
 338         bool modified = TRUE;
 339
 340         length = 0;
 341         if ((buffer = field_buffer(before, 1)) != 0)
 342             length = atoi(buffer);
 343         if (length < before_off)
 344             length = before_off;
 345         switch (*result) {
 346         case REQ_CLR_EOF:
 347             length = before_off;
 348             break;
 349         case REQ_CLR_EOL:
 350             if (before_row + 1 == before->rows)
 351                 length = before_off;
 352             break;
 353         case REQ_CLR_FIELD:
 354             length = 0;
 355             break;
 356         case REQ_DEL_CHAR:
 357             if (length > before_off)
 358                 --length;
 359             break;
 360         case REQ_DEL_PREV:
 361             if (length > 0) {
 362                 if (before_col > 0) {
 363                     --length;
 364                 } else if (before_row > 0) {
 365                     length -= before->cols + before_col;
 366                 }
 367             }
 368             break;
 369         case REQ_NEW_LINE:
 370             length += before->cols;
 371             break;
 372 #if 0
 373             /* FIXME: finish these */
 374         case REQ_DEL_LINE:      /* delete line */
 375         case REQ_DEL_WORD:      /* delete word at cursor */
 376         case REQ_INS_CHAR:      /* insert blank char at cursor */
 377         case REQ_INS_LINE:      /* insert blank line at cursor */
 378         case REQ_INS_MODE:      /* begin insert mode */
 379         case REQ_OVL_MODE:      /* begin overlay mode */
 380 #endif
 381             /* ignore all of the motion commands */
 382         case REQ_SCR_BCHAR:     /* FALLTHRU */
 383         case REQ_SCR_BHPAGE:    /* FALLTHRU */
 384         case REQ_SCR_BLINE:     /* FALLTHRU */
 385         case REQ_SCR_BPAGE:     /* FALLTHRU */
 386         case REQ_SCR_FCHAR:     /* FALLTHRU */
 387         case REQ_SCR_FHPAGE:    /* FALLTHRU */
 388         case REQ_SCR_FLINE:     /* FALLTHRU */
 389         case REQ_SCR_FPAGE:     /* FALLTHRU */
 390         case REQ_SCR_HBHALF:    /* FALLTHRU */
 391         case REQ_SCR_HBLINE:    /* FALLTHRU */
 392         case REQ_SCR_HFHALF:    /* FALLTHRU */
 393         case REQ_SCR_HFLINE:    /* FALLTHRU */
 394         case REQ_BEG_FIELD:     /* FALLTHRU */
 395         case REQ_BEG_LINE:      /* FALLTHRU */
 396         case REQ_DOWN_CHAR:     /* FALLTHRU */
 397         case REQ_DOWN_FIELD:    /* FALLTHRU */
 398         case REQ_END_FIELD:     /* FALLTHRU */
 399         case REQ_END_LINE:      /* FALLTHRU */
 400         case REQ_FIRST_FIELD:   /* FALLTHRU */
 401         case REQ_FIRST_PAGE:    /* FALLTHRU */
 402         case REQ_LAST_FIELD:    /* FALLTHRU */
 403         case REQ_LAST_PAGE:     /* FALLTHRU */
 404         case REQ_LEFT_CHAR:     /* FALLTHRU */
 405         case REQ_LEFT_FIELD:    /* FALLTHRU */
 406         case REQ_NEXT_CHAR:     /* FALLTHRU */
 407         case REQ_NEXT_CHOICE:   /* FALLTHRU */
 408         case REQ_NEXT_FIELD:    /* FALLTHRU */
 409         case REQ_NEXT_LINE:     /* FALLTHRU */
 410         case REQ_NEXT_PAGE:     /* FALLTHRU */
 411         case REQ_NEXT_WORD:     /* FALLTHRU */
 412         case REQ_PREV_CHAR:     /* FALLTHRU */
 413         case REQ_PREV_CHOICE:   /* FALLTHRU */
 414         case REQ_PREV_FIELD:    /* FALLTHRU */
 415         case REQ_PREV_LINE:     /* FALLTHRU */
 416         case REQ_PREV_PAGE:     /* FALLTHRU */
 417         case REQ_PREV_WORD:     /* FALLTHRU */
 418         case REQ_RIGHT_CHAR:    /* FALLTHRU */
 419         case REQ_RIGHT_FIELD:   /* FALLTHRU */
 420         case REQ_SFIRST_FIELD:  /* FALLTHRU */
 421         case REQ_SLAST_FIELD:   /* FALLTHRU */
 422         case REQ_SNEXT_FIELD:   /* FALLTHRU */
 423         case REQ_SPREV_FIELD:   /* FALLTHRU */
 424         case REQ_UP_CHAR:       /* FALLTHRU */
 425         case REQ_UP_FIELD:      /* FALLTHRU */
 426         case REQ_VALIDATION:    /* FALLTHRU */
 427             modified = FALSE;
 428             break;
 429
 430         default:
 431             modified = FALSE;
 432             if (ch >= MIN_FORM_COMMAND) {
 433                 beep();
 434             } else if (isprint(ch)) {
 435                 modified = TRUE;
 436             }
 437             break;
 438         }
 439
 440         /*
 441          * If we do not force a re-validation, then field_buffer 0 will
 442          * be lagging by one character.
 443          */
 444         if (modified && form_driver(form, REQ_VALIDATION) == E_OK && *result
 445             < MIN_FORM_COMMAND)
 446             ++length;
 447
 448         sprintf(lengths, "%d", length);
 449         set_field_buffer(before, 1, lengths);
 450     }
 451
 452     if (current_field(form) != before)
 453         inactive_field(before);
 454     return status;
 455 }
 456 #else
 457
 458 extern void no_edit_field(void);
 459
 460 void
 461 no_edit_field(void)
 462 {
 463 }
 464
 465 #endif