driver.c revision 1.8
1 /* $NetBSD: driver.c,v 1.8 2001/05/11 14:04:48 blymn Exp $ */ 2 3 /*- 4 * Copyright (c) 1998-1999 Brett Lymn 5 * (blymn (at) baea.com.au, brett_lymn (at) yahoo.com.au) 6 * All rights reserved. 7 * 8 * This code has been donated to The NetBSD Foundation by the Author. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. The name of the author may not be used to endorse or promote products 16 * derived from this software withough specific prior written permission 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * 30 */ 31 32 #include <ctype.h> 33 #include "form.h" 34 #include "internals.h" 35 36 static int 37 traverse_form_links(FORM *form, int direction); 38 39 /* 40 * Traverse the links of the current field in the given direction until 41 * either a active & visible field is found or we return to the current 42 * field. Direction is the REQ_{LEFT,RIGHT,UP,DOWN}_FIELD driver commands. 43 * The function returns E_OK if a valid field is found, E_REQUEST_DENIED 44 * otherwise. 45 */ 46 static int 47 traverse_form_links(FORM *form, int direction) 48 { 49 unsigned index; 50 51 index = form->cur_field; 52 53 do { 54 switch (direction) { 55 case REQ_LEFT_FIELD: 56 if (form->fields[index]->left == NULL) 57 return E_REQUEST_DENIED; 58 index = form->fields[index]->left->index; 59 break; 60 61 case REQ_RIGHT_FIELD: 62 if (form->fields[index]->right == NULL) 63 return E_REQUEST_DENIED; 64 index = form->fields[index]->right->index; 65 break; 66 67 case REQ_UP_FIELD: 68 if (form->fields[index]->up == NULL) 69 return E_REQUEST_DENIED; 70 index = form->fields[index]->up->index; 71 break; 72 73 case REQ_DOWN_FIELD: 74 if (form->fields[index]->down == NULL) 75 return E_REQUEST_DENIED; 76 index = form->fields[index]->down->index; 77 break; 78 79 default: 80 return E_REQUEST_DENIED; 81 } 82 83 if ((form->fields[index]->opts & (O_ACTIVE | O_VISIBLE)) 84 == (O_ACTIVE | O_VISIBLE)) { 85 form->cur_field = index; 86 return E_OK; 87 } 88 } while (index != form->cur_field); 89 90 return E_REQUEST_DENIED; 91 } 92 93 int 94 form_driver(FORM *form, int c) 95 { 96 FIELD *fieldp; 97 int update_page, update_field, old_field, old_page, status; 98 int start_field; 99 unsigned int pos; 100 101 if (form == NULL) 102 return E_BAD_ARGUMENT; 103 104 if ((form->fields == NULL) || (*(form->fields) == NULL)) 105 return E_INVALID_FIELD; 106 107 if (form->posted != 1) 108 return E_NOT_POSTED; 109 110 if (form->in_init == 1) 111 return E_BAD_STATE; 112 113 114 old_field = start_field = form->cur_field; 115 fieldp = form->fields[form->cur_field]; 116 update_page = update_field = 0; 117 status = E_OK; 118 119 if (c < REQ_MIN_REQUEST) { 120 if (isprint(c)) { 121 do { 122 pos = fieldp->start_char + fieldp->cursor_xpos 123 + fieldp->lines[fieldp->start_line + fieldp->cursor_ypos].start; 124 125 /* check if we are allowed to edit this field */ 126 if ((fieldp->opts & O_EDIT) != O_EDIT) 127 return E_REQUEST_DENIED; 128 129 if ((status = 130 (_formi_add_char(fieldp, pos, c))) 131 == E_REQUEST_DENIED) { 132 133 /* 134 * Need to check here if we 135 * want to autoskip. we 136 * call the form driver 137 * recursively to pos us on 138 * the next field and then 139 * we loop back to ensure 140 * the next field selected 141 * can have data added to it 142 */ 143 if ((fieldp->opts & O_AUTOSKIP) 144 != O_AUTOSKIP) 145 return E_REQUEST_DENIED; 146 status = form_driver(form, 147 REQ_NEXT_FIELD); 148 if (status != E_OK) 149 return status; 150 151 /* 152 * check if we have looped 153 * around all the fields. 154 * This can easily happen if 155 * all the fields are full. 156 */ 157 if (start_field == form->cur_field) 158 return E_REQUEST_DENIED; 159 160 old_field = form->cur_field; 161 fieldp = form->fields[form->cur_field]; 162 status = _formi_add_char(fieldp, 163 fieldp->start_char 164 + fieldp->cursor_xpos, 165 c); 166 } else if (status == E_INVALID_FIELD) 167 /* char failed validation, just 168 * return the status. 169 */ 170 return status; 171 } 172 while (status != E_OK); 173 update_field = (status == E_OK); 174 } else 175 return E_REQUEST_DENIED; 176 } else { 177 if (c > REQ_MAX_COMMAND) 178 return E_UNKNOWN_COMMAND; 179 180 if ((c >= REQ_NEXT_PAGE) && (c <= REQ_DOWN_FIELD)) { 181 /* first check the field we are in is ok */ 182 if (_formi_validate_field(form) != E_OK) 183 return E_INVALID_FIELD; 184 185 if (form->field_term != NULL) 186 form->field_term(form); 187 188 /* 189 * if we have a page movement then the form term 190 * needs to be called too 191 */ 192 if ((c <= REQ_LAST_PAGE) && (form->form_term != NULL)) 193 form->form_term(form); 194 } 195 196 197 switch (c) { 198 case REQ_NEXT_PAGE: 199 if (form->page < form->max_page) { 200 old_page = form->page; 201 form->page++; 202 update_page = 1; 203 if (_formi_pos_first_field(form) != E_OK) { 204 form->page = old_page; 205 status = E_REQUEST_DENIED; 206 } 207 } else 208 status = E_REQUEST_DENIED; 209 break; 210 211 case REQ_PREV_PAGE: 212 if (form->page > 0) { 213 old_page = form->page; 214 form->page--; 215 update_page = 1; 216 if (_formi_pos_first_field(form) != E_OK) { 217 form->page = old_page; 218 status = E_REQUEST_DENIED; 219 } 220 } else 221 status = E_REQUEST_DENIED; 222 break; 223 224 case REQ_FIRST_PAGE: 225 old_page = form->page; 226 form->page = 0; 227 update_page = 1; 228 if (_formi_pos_first_field(form) != E_OK) { 229 form->page = old_page; 230 status = E_REQUEST_DENIED; 231 } 232 break; 233 234 case REQ_LAST_PAGE: 235 old_page = form->page; 236 form->page = form->max_page - 1; 237 update_page = 1; 238 if (_formi_pos_first_field(form) != E_OK) { 239 form->page = old_page; 240 status = E_REQUEST_DENIED; 241 } 242 break; 243 244 case REQ_NEXT_FIELD: 245 status = _formi_pos_new_field(form, _FORMI_FORWARD, 246 FALSE); 247 update_field = 1; 248 break; 249 250 case REQ_PREV_FIELD: 251 status = _formi_pos_new_field(form, _FORMI_BACKWARD, 252 FALSE); 253 update_field = 1; 254 break; 255 256 case REQ_FIRST_FIELD: 257 form->cur_field = 0; 258 update_field = 1; 259 break; 260 261 case REQ_LAST_FIELD: 262 form->cur_field = form->field_count - 1; 263 update_field = 1; 264 break; 265 266 case REQ_SNEXT_FIELD: 267 status = _formi_pos_new_field(form, _FORMI_FORWARD, 268 TRUE); 269 update_field = 1; 270 break; 271 272 case REQ_SPREV_FIELD: 273 status = _formi_pos_new_field(form, _FORMI_BACKWARD, 274 TRUE); 275 update_field = 1; 276 break; 277 278 case REQ_SFIRST_FIELD: 279 fieldp = CIRCLEQ_FIRST(&form->sorted_fields); 280 form->cur_field = fieldp->index; 281 update_field = 1; 282 break; 283 284 case REQ_SLAST_FIELD: 285 fieldp = CIRCLEQ_LAST(&form->sorted_fields); 286 form->cur_field = fieldp->index; 287 update_field = 1; 288 break; 289 290 /* 291 * The up, down, left and right field traversals 292 * are rolled up into a single function, allow a 293 * fall through to that function. 294 */ 295 /* FALLTHROUGH */ 296 case REQ_LEFT_FIELD: 297 case REQ_RIGHT_FIELD: 298 case REQ_UP_FIELD: 299 case REQ_DOWN_FIELD: 300 status = traverse_form_links(form, c); 301 update_field = 1; 302 break; 303 304 /* the following commands modify the buffer, check if 305 this is allowed first before falling through. */ 306 /* FALLTHROUGH */ 307 case REQ_DEL_PREV: 308 /* 309 * need to check for the overloading of this 310 * request. If overload flag set and we are 311 * at the start of field this request turns 312 * into a previous field request. Otherwise 313 * fallthrough to the field handler. 314 */ 315 if ((form->opts & O_BS_OVERLOAD) == O_BS_OVERLOAD) { 316 if ((fieldp->start_char == 0) && 317 (fieldp->start_line == 0) && 318 (fieldp->cursor_xpos == 0)) { 319 update_field = 320 _formi_manipulate_field(form, 321 REQ_PREV_FIELD); 322 break; 323 } 324 } 325 326 /* FALLTHROUGH */ 327 case REQ_NEW_LINE: 328 /* 329 * need to check for the overloading of this 330 * request. If overload flag set and we are 331 * at the start of field this request turns 332 * into a next field request. Otherwise 333 * fallthrough to the field handler. 334 */ 335 if ((form->opts & O_NL_OVERLOAD) == O_NL_OVERLOAD) { 336 if ((fieldp->start_char == 0) && 337 (fieldp->start_line == 0) && 338 (fieldp->cursor_xpos == 0)) { 339 update_field = 340 _formi_manipulate_field(form, 341 REQ_NEXT_FIELD); 342 break; 343 } 344 } 345 346 /* FALLTHROUGH */ 347 case REQ_INS_CHAR: 348 case REQ_INS_LINE: 349 case REQ_DEL_CHAR: 350 case REQ_DEL_LINE: 351 case REQ_DEL_WORD: 352 case REQ_CLR_EOL: 353 case REQ_CLR_EOF: 354 case REQ_CLR_FIELD: 355 case REQ_OVL_MODE: 356 case REQ_INS_MODE: 357 /* check if we are allowed to edit the field and fall 358 * through if we are. 359 */ 360 if ((form->fields[form->cur_field]->opts & O_EDIT) != O_EDIT) 361 return E_REQUEST_DENIED; 362 363 /* the following manipulate the field contents, bundle 364 them into one function.... */ 365 /* FALLTHROUGH */ 366 case REQ_NEXT_CHAR: 367 case REQ_PREV_CHAR: 368 case REQ_NEXT_LINE: 369 case REQ_PREV_LINE: 370 case REQ_NEXT_WORD: 371 case REQ_PREV_WORD: 372 case REQ_BEG_FIELD: 373 case REQ_END_FIELD: 374 case REQ_BEG_LINE: 375 case REQ_END_LINE: 376 case REQ_LEFT_CHAR: 377 case REQ_RIGHT_CHAR: 378 case REQ_UP_CHAR: 379 case REQ_DOWN_CHAR: 380 case REQ_SCR_FLINE: 381 case REQ_SCR_BLINE: 382 case REQ_SCR_FPAGE: 383 case REQ_SCR_BPAGE: 384 case REQ_SCR_FHPAGE: 385 case REQ_SCR_BHPAGE: 386 case REQ_SCR_FCHAR: 387 case REQ_SCR_BCHAR: 388 case REQ_SCR_HFLINE: 389 case REQ_SCR_HBLINE: 390 case REQ_SCR_HFHALF: 391 case REQ_SCR_HBHALF: 392 update_field = _formi_manipulate_field(form, c); 393 break; 394 395 case REQ_VALIDATION: 396 return _formi_validate_field(form); 397 /* NOTREACHED */ 398 break; 399 400 case REQ_PREV_CHOICE: 401 case REQ_NEXT_CHOICE: 402 update_field = _formi_field_choice(form, c); 403 break; 404 405 default: /* should not need to do this, but.... */ 406 return E_UNKNOWN_COMMAND; 407 /* NOTREACHED */ 408 break; 409 } 410 } 411 412 /* call the field and form init functions if required. */ 413 if ((c >= REQ_NEXT_PAGE) && (c <= REQ_DOWN_FIELD)) { 414 if (form->field_init != NULL) 415 form->field_init(form); 416 417 /* 418 * if we have a page movement then the form init 419 * needs to be called too 420 */ 421 if ((c <= REQ_LAST_PAGE) && (form->form_init != NULL)) 422 form->form_init(form); 423 424 /* 425 * if there was an error just return now... 426 */ 427 if (status != E_OK) 428 return status; 429 430 /* if we have no error, reset the various offsets */ 431 fieldp = form->fields[form->cur_field]; 432 fieldp->start_char = 0; 433 fieldp->start_line = 0; 434 fieldp->cursor_xpos = 0; 435 fieldp->cursor_ypos = 0; 436 } 437 438 if (update_field < 0) 439 return update_field; 440 441 if (update_field == 1) 442 update_page |= _formi_update_field(form, old_field); 443 444 if (update_page == 1) 445 _formi_draw_page(form); 446 447 pos_form_cursor(form); 448 return E_OK; 449 } 450 451
Indexes created Wed Sep 24 15:09:51 GMT 2025