Amit Daniel Kachhap | e6a01f5 | 2011-07-20 11:45:59 +0530 | [diff] [blame] | 1 | /**************************************************************************** |
| 2 | * Copyright (c) 2003-2006,2008 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 1.14 2008/10/18 20:40:20 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 | return form->curcol + form->currow * field->dcols; |
| 292 | } |
| 293 | |
| 294 | static void |
| 295 | inactive_field(FIELD * f) |
| 296 | { |
| 297 | void *ptr = field_userptr(f); |
| 298 | set_field_back(f, (chtype) ptr); |
| 299 | } |
| 300 | |
| 301 | int |
| 302 | edit_field(FORM * form, int *result) |
| 303 | { |
| 304 | int ch = wgetch(form_win(form)); |
| 305 | int status; |
| 306 | FIELD *before; |
| 307 | unsigned n; |
| 308 | char lengths[80]; |
| 309 | int length; |
| 310 | char *buffer; |
| 311 | int before_row = form->currow; |
| 312 | int before_col = form->curcol; |
| 313 | int before_off = offset_in_field(form); |
| 314 | |
| 315 | before = current_field(form); |
| 316 | set_field_back(before, A_NORMAL); |
| 317 | if (ch <= KEY_MAX) { |
| 318 | set_field_back(before, A_REVERSE); |
| 319 | } else if (ch <= MAX_FORM_COMMAND) { |
| 320 | inactive_field(before); |
| 321 | } |
| 322 | |
| 323 | *result = ch; |
| 324 | for (n = 0; n < SIZEOF(commands); ++n) { |
| 325 | if (commands[n].code == ch) { |
| 326 | *result = commands[n].result; |
| 327 | break; |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | status = form_driver(form, *result); |
| 332 | |
| 333 | if (status == E_OK) { |
| 334 | bool modified = TRUE; |
| 335 | |
| 336 | length = 0; |
| 337 | if ((buffer = field_buffer(before, 1)) != 0) |
| 338 | length = atoi(buffer); |
| 339 | if (length < before_off) |
| 340 | length = before_off; |
| 341 | switch (*result) { |
| 342 | case REQ_CLR_EOF: |
| 343 | length = before_off; |
| 344 | break; |
| 345 | case REQ_CLR_EOL: |
| 346 | if (before_row + 1 == before->rows) |
| 347 | length = before_off; |
| 348 | break; |
| 349 | case REQ_CLR_FIELD: |
| 350 | length = 0; |
| 351 | break; |
| 352 | case REQ_DEL_CHAR: |
| 353 | if (length > before_off) |
| 354 | --length; |
| 355 | break; |
| 356 | case REQ_DEL_PREV: |
| 357 | if (length > 0) { |
| 358 | if (before_col > 0) { |
| 359 | --length; |
| 360 | } else if (before_row > 0) { |
| 361 | length -= before->cols + before_col; |
| 362 | } |
| 363 | } |
| 364 | break; |
| 365 | case REQ_NEW_LINE: |
| 366 | length += before->cols; |
| 367 | break; |
| 368 | #if 0 |
| 369 | /* FIXME: finish these */ |
| 370 | case REQ_DEL_LINE: /* delete line */ |
| 371 | case REQ_DEL_WORD: /* delete word at cursor */ |
| 372 | case REQ_INS_CHAR: /* insert blank char at cursor */ |
| 373 | case REQ_INS_LINE: /* insert blank line at cursor */ |
| 374 | case REQ_INS_MODE: /* begin insert mode */ |
| 375 | case REQ_OVL_MODE: /* begin overlay mode */ |
| 376 | #endif |
| 377 | /* ignore all of the motion commands */ |
| 378 | case REQ_SCR_BCHAR: /* FALLTHRU */ |
| 379 | case REQ_SCR_BHPAGE: /* FALLTHRU */ |
| 380 | case REQ_SCR_BLINE: /* FALLTHRU */ |
| 381 | case REQ_SCR_BPAGE: /* FALLTHRU */ |
| 382 | case REQ_SCR_FCHAR: /* FALLTHRU */ |
| 383 | case REQ_SCR_FHPAGE: /* FALLTHRU */ |
| 384 | case REQ_SCR_FLINE: /* FALLTHRU */ |
| 385 | case REQ_SCR_FPAGE: /* FALLTHRU */ |
| 386 | case REQ_SCR_HBHALF: /* FALLTHRU */ |
| 387 | case REQ_SCR_HBLINE: /* FALLTHRU */ |
| 388 | case REQ_SCR_HFHALF: /* FALLTHRU */ |
| 389 | case REQ_SCR_HFLINE: /* FALLTHRU */ |
| 390 | case REQ_BEG_FIELD: /* FALLTHRU */ |
| 391 | case REQ_BEG_LINE: /* FALLTHRU */ |
| 392 | case REQ_DOWN_CHAR: /* FALLTHRU */ |
| 393 | case REQ_DOWN_FIELD: /* FALLTHRU */ |
| 394 | case REQ_END_FIELD: /* FALLTHRU */ |
| 395 | case REQ_END_LINE: /* FALLTHRU */ |
| 396 | case REQ_FIRST_FIELD: /* FALLTHRU */ |
| 397 | case REQ_FIRST_PAGE: /* FALLTHRU */ |
| 398 | case REQ_LAST_FIELD: /* FALLTHRU */ |
| 399 | case REQ_LAST_PAGE: /* FALLTHRU */ |
| 400 | case REQ_LEFT_CHAR: /* FALLTHRU */ |
| 401 | case REQ_LEFT_FIELD: /* FALLTHRU */ |
| 402 | case REQ_NEXT_CHAR: /* FALLTHRU */ |
| 403 | case REQ_NEXT_CHOICE: /* FALLTHRU */ |
| 404 | case REQ_NEXT_FIELD: /* FALLTHRU */ |
| 405 | case REQ_NEXT_LINE: /* FALLTHRU */ |
| 406 | case REQ_NEXT_PAGE: /* FALLTHRU */ |
| 407 | case REQ_NEXT_WORD: /* FALLTHRU */ |
| 408 | case REQ_PREV_CHAR: /* FALLTHRU */ |
| 409 | case REQ_PREV_CHOICE: /* FALLTHRU */ |
| 410 | case REQ_PREV_FIELD: /* FALLTHRU */ |
| 411 | case REQ_PREV_LINE: /* FALLTHRU */ |
| 412 | case REQ_PREV_PAGE: /* FALLTHRU */ |
| 413 | case REQ_PREV_WORD: /* FALLTHRU */ |
| 414 | case REQ_RIGHT_CHAR: /* FALLTHRU */ |
| 415 | case REQ_RIGHT_FIELD: /* FALLTHRU */ |
| 416 | case REQ_SFIRST_FIELD: /* FALLTHRU */ |
| 417 | case REQ_SLAST_FIELD: /* FALLTHRU */ |
| 418 | case REQ_SNEXT_FIELD: /* FALLTHRU */ |
| 419 | case REQ_SPREV_FIELD: /* FALLTHRU */ |
| 420 | case REQ_UP_CHAR: /* FALLTHRU */ |
| 421 | case REQ_UP_FIELD: /* FALLTHRU */ |
| 422 | case REQ_VALIDATION: /* FALLTHRU */ |
| 423 | modified = FALSE; |
| 424 | break; |
| 425 | |
| 426 | default: |
| 427 | modified = FALSE; |
| 428 | if (ch >= MIN_FORM_COMMAND) { |
| 429 | beep(); |
| 430 | } else if (isprint(ch)) { |
| 431 | modified = TRUE; |
| 432 | } |
| 433 | break; |
| 434 | } |
| 435 | |
| 436 | /* |
| 437 | * If we do not force a re-validation, then field_buffer 0 will |
| 438 | * be lagging by one character. |
| 439 | */ |
| 440 | if (modified && form_driver(form, REQ_VALIDATION) == E_OK && *result |
| 441 | < MIN_FORM_COMMAND) |
| 442 | ++length; |
| 443 | |
| 444 | sprintf(lengths, "%d", length); |
| 445 | set_field_buffer(before, 1, lengths); |
| 446 | } |
| 447 | |
| 448 | if (current_field(form) != before) |
| 449 | inactive_field(before); |
| 450 | return status; |
| 451 | } |
| 452 | #else |
| 453 | |
| 454 | extern void no_edit_field(void); |
| 455 | |
| 456 | void |
| 457 | no_edit_field(void) |
| 458 | { |
| 459 | } |
| 460 | |
| 461 | #endif |