Patrick Georgi | 3b77b72 | 2011-07-07 15:41:53 +0200 | [diff] [blame] | 1 | /**************************************************************************** |
| 2 | * Copyright (c) 1998-2009,2010 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 | /**************************************************************************** |
| 30 | * Author: Juergen Pfeifer, 1995,1997 * |
| 31 | ****************************************************************************/ |
| 32 | |
| 33 | #include "form.priv.h" |
| 34 | |
| 35 | MODULE_ID("$Id: frm_driver.c,v 1.98 2010/05/01 21:11:43 tom Exp $") |
| 36 | |
| 37 | /*---------------------------------------------------------------------------- |
| 38 | This is the core module of the form library. It contains the majority |
| 39 | of the driver routines as well as the form_driver function. |
| 40 | |
| 41 | Essentially this module is nearly the whole library. This is because |
| 42 | all the functions in this module depends on some others in the module, |
| 43 | so it makes no sense to split them into separate files because they |
| 44 | will always be linked together. The only acceptable concern is turnaround |
| 45 | time for this module, but now we have all Pentiums or RISCs, so what! |
| 46 | |
| 47 | The driver routines are grouped into nine generic categories: |
| 48 | |
| 49 | a) Page Navigation ( all functions prefixed by PN_ ) |
| 50 | The current page of the form is left and some new page is |
| 51 | entered. |
| 52 | b) Inter-Field Navigation ( all functions prefixed by FN_ ) |
| 53 | The current field of the form is left and some new field is |
| 54 | entered. |
| 55 | c) Intra-Field Navigation ( all functions prefixed by IFN_ ) |
| 56 | The current position in the current field is changed. |
| 57 | d) Vertical Scrolling ( all functions prefixed by VSC_ ) |
| 58 | Essentially this is a specialization of Intra-Field navigation. |
| 59 | It has to check for a multi-line field. |
| 60 | e) Horizontal Scrolling ( all functions prefixed by HSC_ ) |
| 61 | Essentially this is a specialization of Intra-Field navigation. |
| 62 | It has to check for a single-line field. |
| 63 | f) Field Editing ( all functions prefixed by FE_ ) |
| 64 | The content of the current field is changed |
| 65 | g) Edit Mode requests ( all functions prefixed by EM_ ) |
| 66 | Switching between insert and overlay mode |
| 67 | h) Field-Validation requests ( all functions prefixed by FV_ ) |
| 68 | Perform verifications of the field. |
| 69 | i) Choice requests ( all functions prefixed by CR_ ) |
| 70 | Requests to enumerate possible field values |
| 71 | --------------------------------------------------------------------------*/ |
| 72 | |
| 73 | /*---------------------------------------------------------------------------- |
| 74 | Some remarks on the placements of assert() macros : |
| 75 | I use them only on "strategic" places, i.e. top level entries where |
| 76 | I want to make sure that things are set correctly. Throughout subordinate |
| 77 | routines I omit them mostly. |
| 78 | --------------------------------------------------------------------------*/ |
| 79 | |
| 80 | /* |
| 81 | Some options that may effect compatibility in behavior to SVr4 forms, |
| 82 | but they are here to allow a more intuitive and user friendly behavior of |
| 83 | our form implementation. This doesn't affect the API, so we feel it is |
| 84 | uncritical. |
| 85 | |
| 86 | The initial implementation tries to stay very close with the behavior |
| 87 | of the original SVr4 implementation, although in some areas it is quite |
| 88 | clear that this isn't the most appropriate way. As far as possible this |
| 89 | sources will allow you to build a forms lib that behaves quite similar |
| 90 | to SVr4, but now and in the future we will give you better options. |
| 91 | Perhaps at some time we will make this configurable at runtime. |
| 92 | */ |
| 93 | |
| 94 | /* Implement a more user-friendly previous/next word behavior */ |
| 95 | #define FRIENDLY_PREV_NEXT_WORD (1) |
| 96 | /* Fix the wrong behavior for forms with all fields inactive */ |
| 97 | #define FIX_FORM_INACTIVE_BUG (1) |
| 98 | /* Allow dynamic field growth also when navigating past the end */ |
| 99 | #define GROW_IF_NAVIGATE (1) |
| 100 | |
| 101 | #if USE_WIDEC_SUPPORT |
| 102 | #define myADDNSTR(w, s, n) wadd_wchnstr(w, s, n) |
| 103 | #define myINSNSTR(w, s, n) wins_wchnstr(w, s, n) |
| 104 | #define myINNSTR(w, s, n) fix_wchnstr(w, s, n) |
| 105 | #define myWCWIDTH(w, y, x) cell_width(w, y, x) |
| 106 | #else |
| 107 | #define myADDNSTR(w, s, n) waddnstr(w, s, n) |
| 108 | #define myINSNSTR(w, s, n) winsnstr(w, s, n) |
| 109 | #define myINNSTR(w, s, n) winnstr(w, s, n) |
| 110 | #define myWCWIDTH(w, y, x) 1 |
| 111 | #endif |
| 112 | |
| 113 | /*---------------------------------------------------------------------------- |
| 114 | Forward references to some internally used static functions |
| 115 | --------------------------------------------------------------------------*/ |
| 116 | static int Inter_Field_Navigation(int (*const fct) (FORM *), FORM *form); |
| 117 | static int FN_Next_Field(FORM *form); |
| 118 | static int FN_Previous_Field(FORM *form); |
| 119 | static int FE_New_Line(FORM *); |
| 120 | static int FE_Delete_Previous(FORM *); |
| 121 | |
| 122 | /*---------------------------------------------------------------------------- |
| 123 | Macro Definitions. |
| 124 | |
| 125 | Some Remarks on that: I use the convention to use UPPERCASE for constants |
| 126 | defined by Macros. If I provide a macro as a kind of inline routine to |
| 127 | provide some logic, I use my Upper_Lower case style. |
| 128 | --------------------------------------------------------------------------*/ |
| 129 | |
| 130 | /* Calculate the position of a single row in a field buffer */ |
| 131 | #define Position_Of_Row_In_Buffer(field,row) ((row)*(field)->dcols) |
| 132 | |
| 133 | /* Calculate start address for the fields buffer# N */ |
| 134 | #define Address_Of_Nth_Buffer(field,N) \ |
| 135 | ((field)->buf + (N)*(1+Buffer_Length(field))) |
| 136 | |
| 137 | /* Calculate the start address of the row in the fields specified buffer# N */ |
| 138 | #define Address_Of_Row_In_Nth_Buffer(field,N,row) \ |
| 139 | (Address_Of_Nth_Buffer(field,N) + Position_Of_Row_In_Buffer(field,row)) |
| 140 | |
| 141 | /* Calculate the start address of the row in the fields primary buffer */ |
| 142 | #define Address_Of_Row_In_Buffer(field,row) \ |
| 143 | Address_Of_Row_In_Nth_Buffer(field,0,row) |
| 144 | |
| 145 | /* Calculate the start address of the row in the forms current field |
| 146 | buffer# N */ |
| 147 | #define Address_Of_Current_Row_In_Nth_Buffer(form,N) \ |
| 148 | Address_Of_Row_In_Nth_Buffer((form)->current,N,(form)->currow) |
| 149 | |
| 150 | /* Calculate the start address of the row in the forms current field |
| 151 | primary buffer */ |
| 152 | #define Address_Of_Current_Row_In_Buffer(form) \ |
| 153 | Address_Of_Current_Row_In_Nth_Buffer(form,0) |
| 154 | |
| 155 | /* Calculate the address of the cursor in the forms current field |
| 156 | primary buffer */ |
| 157 | #define Address_Of_Current_Position_In_Nth_Buffer(form,N) \ |
| 158 | (Address_Of_Current_Row_In_Nth_Buffer(form,N) + (form)->curcol) |
| 159 | |
| 160 | /* Calculate the address of the cursor in the forms current field |
| 161 | buffer# N */ |
| 162 | #define Address_Of_Current_Position_In_Buffer(form) \ |
| 163 | Address_Of_Current_Position_In_Nth_Buffer(form,0) |
| 164 | |
| 165 | /* Logic to decide whether or not a field is actually a field with |
| 166 | vertical or horizontal scrolling */ |
| 167 | #define Is_Scroll_Field(field) \ |
| 168 | (((field)->drows > (field)->rows) || \ |
| 169 | ((field)->dcols > (field)->cols)) |
| 170 | |
| 171 | /* Logic to decide whether or not a field needs to have an individual window |
| 172 | instead of a derived window because it contains invisible parts. |
| 173 | This is true for non-public fields and for scrollable fields. */ |
| 174 | #define Has_Invisible_Parts(field) \ |
| 175 | (!((field)->opts & O_PUBLIC) || \ |
| 176 | Is_Scroll_Field(field)) |
| 177 | |
| 178 | /* Logic to decide whether or not a field needs justification */ |
| 179 | #define Justification_Allowed(field) \ |
| 180 | (((field)->just != NO_JUSTIFICATION) && \ |
| 181 | (Single_Line_Field(field)) && \ |
| 182 | (((field)->dcols == (field)->cols) && \ |
| 183 | ((field)->opts & O_STATIC)) ) |
| 184 | |
| 185 | /* Logic to determine whether or not a dynamic field may still grow */ |
| 186 | #define Growable(field) ((field)->status & _MAY_GROW) |
| 187 | |
| 188 | /* Macro to set the attributes for a fields window */ |
| 189 | #define Set_Field_Window_Attributes(field,win) \ |
| 190 | ( wbkgdset((win),(chtype)((field)->pad | (field)->back)), \ |
| 191 | (void) wattrset((win),(field)->fore) ) |
| 192 | |
| 193 | /* Logic to decide whether or not a field really appears on the form */ |
| 194 | #define Field_Really_Appears(field) \ |
| 195 | ((field->form) &&\ |
| 196 | (field->form->status & _POSTED) &&\ |
| 197 | (field->opts & O_VISIBLE) &&\ |
| 198 | (field->page == field->form->curpage)) |
| 199 | |
| 200 | /* Logic to determine whether or not we are on the first position in the |
| 201 | current field */ |
| 202 | #define First_Position_In_Current_Field(form) \ |
| 203 | (((form)->currow==0) && ((form)->curcol==0)) |
| 204 | |
| 205 | #define Minimum(a,b) (((a)<=(b)) ? (a) : (b)) |
| 206 | #define Maximum(a,b) (((a)>=(b)) ? (a) : (b)) |
| 207 | |
| 208 | /*---------------------------------------------------------------------------- |
| 209 | Useful constants |
| 210 | --------------------------------------------------------------------------*/ |
| 211 | static FIELD_CELL myBLANK = BLANK; |
| 212 | static FIELD_CELL myZEROS; |
| 213 | |
| 214 | #ifdef TRACE |
| 215 | static void |
| 216 | check_pos(FORM *form, int lineno) |
| 217 | { |
| 218 | int y, x; |
| 219 | |
| 220 | if (form && form->w) |
| 221 | { |
| 222 | getyx(form->w, y, x); |
| 223 | if (y != form->currow || x != form->curcol) |
| 224 | { |
| 225 | T(("CHECKPOS %s@%d have position %d,%d vs want %d,%d", |
| 226 | __FILE__, lineno, |
| 227 | y, x, |
| 228 | form->currow, form->curcol)); |
| 229 | } |
| 230 | } |
| 231 | } |
| 232 | #define CHECKPOS(form) check_pos(form, __LINE__) |
| 233 | #else |
| 234 | #define CHECKPOS(form) /* nothing */ |
| 235 | #endif |
| 236 | |
| 237 | /*---------------------------------------------------------------------------- |
| 238 | Wide-character special functions |
| 239 | --------------------------------------------------------------------------*/ |
| 240 | #if USE_WIDEC_SUPPORT |
| 241 | /* like winsnstr */ |
| 242 | static int |
| 243 | wins_wchnstr(WINDOW *w, cchar_t *s, int n) |
| 244 | { |
| 245 | int code = ERR; |
| 246 | int y, x; |
| 247 | |
| 248 | while (n-- > 0) |
| 249 | { |
| 250 | getyx(w, y, x); |
| 251 | if ((code = wins_wch(w, s++)) != OK) |
| 252 | break; |
| 253 | if ((code = wmove(w, y, x + 1)) != OK) |
| 254 | break; |
| 255 | } |
| 256 | return code; |
| 257 | } |
| 258 | |
| 259 | /* win_wchnstr is inconsistent with winnstr, since it returns OK rather than |
| 260 | * the number of items transferred. |
| 261 | */ |
| 262 | static int |
| 263 | fix_wchnstr(WINDOW *w, cchar_t *s, int n) |
| 264 | { |
| 265 | int x; |
| 266 | |
| 267 | win_wchnstr(w, s, n); |
| 268 | /* |
| 269 | * This function is used to extract the text only from the window. |
| 270 | * Strip attributes and color from the string so they will not be added |
| 271 | * back when copying the string to the window. |
| 272 | */ |
| 273 | for (x = 0; x < n; ++x) |
| 274 | { |
| 275 | RemAttr(s[x], A_ATTRIBUTES); |
| 276 | SetPair(s[x], 0); |
| 277 | } |
| 278 | return n; |
| 279 | } |
| 280 | |
| 281 | /* |
| 282 | * Returns the column of the base of the given cell. |
| 283 | */ |
| 284 | static int |
| 285 | cell_base(WINDOW *win, int y, int x) |
| 286 | { |
| 287 | int result = x; |
| 288 | |
| 289 | while (LEGALYX(win, y, x)) |
| 290 | { |
| 291 | cchar_t *data = &(win->_line[y].text[x]); |
| 292 | |
| 293 | if (isWidecBase(CHDEREF(data)) || !isWidecExt(CHDEREF(data))) |
| 294 | { |
| 295 | result = x; |
| 296 | break; |
| 297 | } |
| 298 | --x; |
| 299 | } |
| 300 | return result; |
| 301 | } |
| 302 | |
| 303 | /* |
| 304 | * Returns the number of columns needed for the given cell in a window. |
| 305 | */ |
| 306 | static int |
| 307 | cell_width(WINDOW *win, int y, int x) |
| 308 | { |
| 309 | int result = 1; |
| 310 | |
| 311 | if (LEGALYX(win, y, x)) |
| 312 | { |
| 313 | cchar_t *data = &(win->_line[y].text[x]); |
| 314 | |
| 315 | if (isWidecExt(CHDEREF(data))) |
| 316 | { |
| 317 | /* recur, providing the number of columns to the next character */ |
| 318 | result = cell_width(win, y, x - 1); |
| 319 | } |
| 320 | else |
| 321 | { |
| 322 | result = wcwidth(CharOf(CHDEREF(data))); |
| 323 | } |
| 324 | } |
| 325 | return result; |
| 326 | } |
| 327 | |
| 328 | /* |
| 329 | * There is no wide-character function such as wdel_wch(), so we must find |
| 330 | * all of the cells that comprise a multi-column character and delete them |
| 331 | * one-by-one. |
| 332 | */ |
| 333 | static void |
| 334 | delete_char(FORM *form) |
| 335 | { |
| 336 | int cells = cell_width(form->w, form->currow, form->curcol); |
| 337 | |
| 338 | form->curcol = cell_base(form->w, form->currow, form->curcol); |
| 339 | wmove(form->w, form->currow, form->curcol); |
| 340 | while (cells-- > 0) |
| 341 | { |
| 342 | wdelch(form->w); |
| 343 | } |
| 344 | } |
| 345 | #define DeleteChar(form) delete_char(form) |
| 346 | #else |
| 347 | #define DeleteChar(form) \ |
| 348 | wmove((form)->w, (form)->currow, (form)->curcol), \ |
| 349 | wdelch((form)->w) |
| 350 | #endif |
| 351 | |
| 352 | /*--------------------------------------------------------------------------- |
| 353 | | Facility : libnform |
| 354 | | Function : static char *Get_Start_Of_Data(char * buf, int blen) |
| 355 | | |
| 356 | | Description : Return pointer to first non-blank position in buffer. |
| 357 | | If buffer is empty return pointer to buffer itself. |
| 358 | | |
| 359 | | Return Values : Pointer to first non-blank position in buffer |
| 360 | +--------------------------------------------------------------------------*/ |
| 361 | NCURSES_INLINE static FIELD_CELL * |
| 362 | Get_Start_Of_Data(FIELD_CELL *buf, int blen) |
| 363 | { |
| 364 | FIELD_CELL *p = buf; |
| 365 | FIELD_CELL *end = &buf[blen]; |
| 366 | |
| 367 | assert(buf && blen >= 0); |
| 368 | while ((p < end) && ISBLANK(*p)) |
| 369 | p++; |
| 370 | return ((p == end) ? buf : p); |
| 371 | } |
| 372 | |
| 373 | /*--------------------------------------------------------------------------- |
| 374 | | Facility : libnform |
| 375 | | Function : static char *After_End_Of_Data(char * buf, int blen) |
| 376 | | |
| 377 | | Description : Return pointer after last non-blank position in buffer. |
| 378 | | If buffer is empty, return pointer to buffer itself. |
| 379 | | |
| 380 | | Return Values : Pointer to position after last non-blank position in |
| 381 | | buffer. |
| 382 | +--------------------------------------------------------------------------*/ |
| 383 | NCURSES_INLINE static FIELD_CELL * |
| 384 | After_End_Of_Data(FIELD_CELL *buf, int blen) |
| 385 | { |
| 386 | FIELD_CELL *p = &buf[blen]; |
| 387 | |
| 388 | assert(buf && blen >= 0); |
| 389 | while ((p > buf) && ISBLANK(p[-1])) |
| 390 | p--; |
| 391 | return (p); |
| 392 | } |
| 393 | |
| 394 | /*--------------------------------------------------------------------------- |
| 395 | | Facility : libnform |
| 396 | | Function : static char *Get_First_Whitespace_Character( |
| 397 | | char * buf, int blen) |
| 398 | | |
| 399 | | Description : Position to the first whitespace character. |
| 400 | | |
| 401 | | Return Values : Pointer to first whitespace character in buffer. |
| 402 | +--------------------------------------------------------------------------*/ |
| 403 | NCURSES_INLINE static FIELD_CELL * |
| 404 | Get_First_Whitespace_Character(FIELD_CELL *buf, int blen) |
| 405 | { |
| 406 | FIELD_CELL *p = buf; |
| 407 | FIELD_CELL *end = &p[blen]; |
| 408 | |
| 409 | assert(buf && blen >= 0); |
| 410 | while ((p < end) && !ISBLANK(*p)) |
| 411 | p++; |
| 412 | return ((p == end) ? buf : p); |
| 413 | } |
| 414 | |
| 415 | /*--------------------------------------------------------------------------- |
| 416 | | Facility : libnform |
| 417 | | Function : static char *After_Last_Whitespace_Character( |
| 418 | | char * buf, int blen) |
| 419 | | |
| 420 | | Description : Get the position after the last whitespace character. |
| 421 | | |
| 422 | | Return Values : Pointer to position after last whitespace character in |
| 423 | | buffer. |
| 424 | +--------------------------------------------------------------------------*/ |
| 425 | NCURSES_INLINE static FIELD_CELL * |
| 426 | After_Last_Whitespace_Character(FIELD_CELL *buf, int blen) |
| 427 | { |
| 428 | FIELD_CELL *p = &buf[blen]; |
| 429 | |
| 430 | assert(buf && blen >= 0); |
| 431 | while ((p > buf) && !ISBLANK(p[-1])) |
| 432 | p--; |
| 433 | return (p); |
| 434 | } |
| 435 | |
| 436 | /* Set this to 1 to use the div_t version. This is a good idea if your |
| 437 | compiler has an intrinsic div() support. Unfortunately GNU-C has it |
| 438 | not yet. |
| 439 | N.B.: This only works if form->curcol follows immediately form->currow |
| 440 | and both are of type int. |
| 441 | */ |
| 442 | #define USE_DIV_T (0) |
| 443 | |
| 444 | /*--------------------------------------------------------------------------- |
| 445 | | Facility : libnform |
| 446 | | Function : static void Adjust_Cursor_Position( |
| 447 | | FORM * form, const char * pos) |
| 448 | | |
| 449 | | Description : Set current row and column of the form to values |
| 450 | | corresponding to the buffer position. |
| 451 | | |
| 452 | | Return Values : - |
| 453 | +--------------------------------------------------------------------------*/ |
| 454 | NCURSES_INLINE static void |
| 455 | Adjust_Cursor_Position(FORM *form, const FIELD_CELL *pos) |
| 456 | { |
| 457 | FIELD *field; |
| 458 | int idx; |
| 459 | |
| 460 | field = form->current; |
| 461 | assert(pos >= field->buf && field->dcols > 0); |
| 462 | idx = (int)(pos - field->buf); |
| 463 | #if USE_DIV_T |
| 464 | *((div_t *) & (form->currow)) = div(idx, field->dcols); |
| 465 | #else |
| 466 | form->currow = idx / field->dcols; |
| 467 | form->curcol = idx - field->cols * form->currow; |
| 468 | #endif |
| 469 | if (field->drows < form->currow) |
| 470 | form->currow = 0; |
| 471 | } |
| 472 | |
| 473 | /*--------------------------------------------------------------------------- |
| 474 | | Facility : libnform |
| 475 | | Function : static void Buffer_To_Window( |
| 476 | | const FIELD * field, |
| 477 | | WINDOW * win) |
| 478 | | |
| 479 | | Description : Copy the buffer to the window. If it is a multi-line |
| 480 | | field, the buffer is split to the lines of the |
| 481 | | window without any editing. |
| 482 | | |
| 483 | | Return Values : - |
| 484 | +--------------------------------------------------------------------------*/ |
| 485 | static void |
| 486 | Buffer_To_Window(const FIELD *field, WINDOW *win) |
| 487 | { |
| 488 | int width, height; |
| 489 | int y, x; |
| 490 | int len; |
| 491 | int row; |
| 492 | FIELD_CELL *pBuffer; |
| 493 | |
| 494 | assert(win && field); |
| 495 | |
| 496 | getyx(win, y, x); |
| 497 | width = getmaxx(win); |
| 498 | height = getmaxy(win); |
| 499 | |
| 500 | for (row = 0, pBuffer = field->buf; |
| 501 | row < height; |
| 502 | row++, pBuffer += width) |
| 503 | { |
| 504 | if ((len = (int)(After_End_Of_Data(pBuffer, width) - pBuffer)) > 0) |
| 505 | { |
| 506 | wmove(win, row, 0); |
| 507 | myADDNSTR(win, pBuffer, len); |
| 508 | } |
| 509 | } |
| 510 | wmove(win, y, x); |
| 511 | } |
| 512 | |
| 513 | /*--------------------------------------------------------------------------- |
| 514 | | Facility : libnform |
| 515 | | Function : void _nc_get_fieldbuffer( |
| 516 | | WINDOW * win, |
| 517 | | FIELD * field, |
| 518 | | FIELD_CELL * buf) |
| 519 | | |
| 520 | | Description : Copy the content of the window into the buffer. |
| 521 | | The multiple lines of a window are simply |
| 522 | | concatenated into the buffer. Pad characters in |
| 523 | | the window will be replaced by blanks in the buffer. |
| 524 | | |
| 525 | | Return Values : - |
| 526 | +--------------------------------------------------------------------------*/ |
| 527 | NCURSES_EXPORT(void) |
| 528 | _nc_get_fieldbuffer(FORM *form, FIELD *field, FIELD_CELL *buf) |
| 529 | { |
| 530 | int pad; |
| 531 | int len = 0; |
| 532 | FIELD_CELL *p; |
| 533 | int row, height; |
| 534 | WINDOW *win; |
| 535 | |
| 536 | assert(form && field && buf); |
| 537 | |
| 538 | win = form->w; |
| 539 | assert(win); |
| 540 | |
| 541 | pad = field->pad; |
| 542 | p = buf; |
| 543 | height = getmaxy(win); |
| 544 | |
| 545 | for (row = 0; (row < height) && (row < field->drows); row++) |
| 546 | { |
| 547 | wmove(win, row, 0); |
| 548 | len += myINNSTR(win, p + len, field->dcols); |
| 549 | } |
| 550 | p[len] = myZEROS; |
| 551 | |
| 552 | /* replace visual padding character by blanks in buffer */ |
| 553 | if (pad != C_BLANK) |
| 554 | { |
| 555 | int i; |
| 556 | |
| 557 | for (i = 0; i < len; i++, p++) |
| 558 | { |
| 559 | if ((unsigned long)CharOf(*p) == ChCharOf(pad) |
| 560 | #if USE_WIDEC_SUPPORT |
| 561 | && p->chars[1] == 0 |
| 562 | #endif |
| 563 | ) |
| 564 | *p = myBLANK; |
| 565 | } |
| 566 | } |
| 567 | } |
| 568 | |
| 569 | /*--------------------------------------------------------------------------- |
| 570 | | Facility : libnform |
| 571 | | Function : static void Window_To_Buffer( |
| 572 | | FORM * form, |
| 573 | | FIELD * field) |
| 574 | | |
| 575 | | Description : Copy the content of the window into the buffer. |
| 576 | | The multiple lines of a window are simply |
| 577 | | concatenated into the buffer. Pad characters in |
| 578 | | the window will be replaced by blanks in the buffer. |
| 579 | | |
| 580 | | Return Values : - |
| 581 | +--------------------------------------------------------------------------*/ |
| 582 | static void |
| 583 | Window_To_Buffer(FORM *form, FIELD *field) |
| 584 | { |
| 585 | _nc_get_fieldbuffer(form, field, field->buf); |
| 586 | } |
| 587 | |
| 588 | /*--------------------------------------------------------------------------- |
| 589 | | Facility : libnform |
| 590 | | Function : static void Synchronize_Buffer(FORM * form) |
| 591 | | |
| 592 | | Description : If there was a change, copy the content of the |
| 593 | | window into the buffer, so the buffer is synchronized |
| 594 | | with the windows content. We have to indicate that the |
| 595 | | buffer needs validation due to the change. |
| 596 | | |
| 597 | | Return Values : - |
| 598 | +--------------------------------------------------------------------------*/ |
| 599 | NCURSES_INLINE static void |
| 600 | Synchronize_Buffer(FORM *form) |
| 601 | { |
| 602 | if (form->status & _WINDOW_MODIFIED) |
| 603 | { |
| 604 | form->status &= ~_WINDOW_MODIFIED; |
| 605 | form->status |= _FCHECK_REQUIRED; |
| 606 | Window_To_Buffer(form, form->current); |
| 607 | wmove(form->w, form->currow, form->curcol); |
| 608 | } |
| 609 | } |
| 610 | |
| 611 | /*--------------------------------------------------------------------------- |
| 612 | | Facility : libnform |
| 613 | | Function : static bool Field_Grown( FIELD *field, int amount) |
| 614 | | |
| 615 | | Description : This function is called for growable dynamic fields |
| 616 | | only. It has to increase the buffers and to allocate |
| 617 | | a new window for this field. |
| 618 | | This function has the side effect to set a new |
| 619 | | field-buffer pointer, the dcols and drows values |
| 620 | | as well as a new current Window for the field. |
| 621 | | |
| 622 | | Return Values : TRUE - field successfully increased |
| 623 | | FALSE - there was some error |
| 624 | +--------------------------------------------------------------------------*/ |
| 625 | static bool |
| 626 | Field_Grown(FIELD *field, int amount) |
| 627 | { |
| 628 | bool result = FALSE; |
| 629 | |
| 630 | if (field && Growable(field)) |
| 631 | { |
| 632 | bool single_line_field = Single_Line_Field(field); |
| 633 | int old_buflen = Buffer_Length(field); |
| 634 | int new_buflen; |
| 635 | int old_dcols = field->dcols; |
| 636 | int old_drows = field->drows; |
| 637 | FIELD_CELL *oldbuf = field->buf; |
| 638 | FIELD_CELL *newbuf; |
| 639 | |
| 640 | int growth; |
| 641 | FORM *form = field->form; |
| 642 | bool need_visual_update = ((form != (FORM *)0) && |
| 643 | (form->status & _POSTED) && |
| 644 | (form->current == field)); |
| 645 | |
| 646 | if (need_visual_update) |
| 647 | Synchronize_Buffer(form); |
| 648 | |
| 649 | if (single_line_field) |
| 650 | { |
| 651 | growth = field->cols * amount; |
| 652 | if (field->maxgrow) |
| 653 | growth = Minimum(field->maxgrow - field->dcols, growth); |
| 654 | field->dcols += growth; |
| 655 | if (field->dcols == field->maxgrow) |
| 656 | field->status &= ~_MAY_GROW; |
| 657 | } |
| 658 | else |
| 659 | { |
| 660 | growth = (field->rows + field->nrow) * amount; |
| 661 | if (field->maxgrow) |
| 662 | growth = Minimum(field->maxgrow - field->drows, growth); |
| 663 | field->drows += growth; |
| 664 | if (field->drows == field->maxgrow) |
| 665 | field->status &= ~_MAY_GROW; |
| 666 | } |
| 667 | /* drows, dcols changed, so we get really the new buffer length */ |
| 668 | new_buflen = Buffer_Length(field); |
| 669 | newbuf = (FIELD_CELL *)malloc(Total_Buffer_Size(field)); |
| 670 | if (!newbuf) |
| 671 | { |
| 672 | /* restore to previous state */ |
| 673 | field->dcols = old_dcols; |
| 674 | field->drows = old_drows; |
| 675 | if ((single_line_field && (field->dcols != field->maxgrow)) || |
| 676 | (!single_line_field && (field->drows != field->maxgrow))) |
| 677 | field->status |= _MAY_GROW; |
| 678 | } |
| 679 | else |
| 680 | { |
| 681 | /* Copy all the buffers. This is the reason why we can't just use |
| 682 | * realloc(). |
| 683 | */ |
| 684 | int i, j; |
| 685 | FIELD_CELL *old_bp; |
| 686 | FIELD_CELL *new_bp; |
| 687 | |
| 688 | result = TRUE; /* allow sharing of recovery on failure */ |
| 689 | |
| 690 | T((T_CREATE("fieldcell %p"), (void *)newbuf)); |
| 691 | field->buf = newbuf; |
| 692 | for (i = 0; i <= field->nbuf; i++) |
| 693 | { |
| 694 | new_bp = Address_Of_Nth_Buffer(field, i); |
| 695 | old_bp = oldbuf + i * (1 + old_buflen); |
| 696 | for (j = 0; j < old_buflen; ++j) |
| 697 | new_bp[j] = old_bp[j]; |
| 698 | while (j < new_buflen) |
| 699 | new_bp[j++] = myBLANK; |
| 700 | new_bp[new_buflen] = myZEROS; |
| 701 | } |
| 702 | |
| 703 | #if USE_WIDEC_SUPPORT && NCURSES_EXT_FUNCS |
| 704 | if (wresize(field->working, 1, Buffer_Length(field) + 1) == ERR) |
| 705 | result = FALSE; |
| 706 | #endif |
| 707 | |
| 708 | if (need_visual_update && result) |
| 709 | { |
| 710 | WINDOW *new_window = newpad(field->drows, field->dcols); |
| 711 | |
| 712 | if (new_window != 0) |
| 713 | { |
| 714 | assert(form != (FORM *)0); |
| 715 | if (form->w) |
| 716 | delwin(form->w); |
| 717 | form->w = new_window; |
| 718 | Set_Field_Window_Attributes(field, form->w); |
| 719 | werase(form->w); |
| 720 | Buffer_To_Window(field, form->w); |
| 721 | untouchwin(form->w); |
| 722 | wmove(form->w, form->currow, form->curcol); |
| 723 | } |
| 724 | else |
| 725 | result = FALSE; |
| 726 | } |
| 727 | |
| 728 | if (result) |
| 729 | { |
| 730 | free(oldbuf); |
| 731 | /* reflect changes in linked fields */ |
| 732 | if (field != field->link) |
| 733 | { |
| 734 | FIELD *linked_field; |
| 735 | |
| 736 | for (linked_field = field->link; |
| 737 | linked_field != field; |
| 738 | linked_field = linked_field->link) |
| 739 | { |
| 740 | linked_field->buf = field->buf; |
| 741 | linked_field->drows = field->drows; |
| 742 | linked_field->dcols = field->dcols; |
| 743 | } |
| 744 | } |
| 745 | } |
| 746 | else |
| 747 | { |
| 748 | /* restore old state */ |
| 749 | field->dcols = old_dcols; |
| 750 | field->drows = old_drows; |
| 751 | field->buf = oldbuf; |
| 752 | if ((single_line_field && |
| 753 | (field->dcols != field->maxgrow)) || |
| 754 | (!single_line_field && |
| 755 | (field->drows != field->maxgrow))) |
| 756 | field->status |= _MAY_GROW; |
| 757 | free(newbuf); |
| 758 | } |
| 759 | } |
| 760 | } |
| 761 | return (result); |
| 762 | } |
| 763 | |
| 764 | #ifdef NCURSES_MOUSE_VERSION |
| 765 | /*--------------------------------------------------------------------------- |
| 766 | | Facility : libnform |
| 767 | | Function : int Field_encloses(FIELD *field, int ry, int rx) |
| 768 | | |
| 769 | | Description : Check if the given coordinates lie within the given field. |
| 770 | | |
| 771 | | Return Values : E_OK - success |
| 772 | | E_BAD_ARGUMENT - invalid form pointer |
| 773 | | E_SYSTEM_ERROR - form has no current field or |
| 774 | | field-window |
| 775 | +--------------------------------------------------------------------------*/ |
| 776 | static int |
| 777 | Field_encloses(FIELD *field, int ry, int rx) |
| 778 | { |
| 779 | T((T_CALLED("Field_encloses(%p)"), (void *)field)); |
| 780 | if (field != 0 |
| 781 | && field->frow <= ry |
| 782 | && (field->frow + field->rows) > ry |
| 783 | && field->fcol <= rx |
| 784 | && (field->fcol + field->cols) > rx) |
| 785 | { |
| 786 | RETURN(E_OK); |
| 787 | } |
| 788 | RETURN(E_INVALID_FIELD); |
| 789 | } |
| 790 | #endif |
| 791 | |
| 792 | /*--------------------------------------------------------------------------- |
| 793 | | Facility : libnform |
| 794 | | Function : int _nc_Position_Form_Cursor(FORM * form) |
| 795 | | |
| 796 | | Description : Position the cursor in the window for the current |
| 797 | | field to be in sync. with the currow and curcol |
| 798 | | values. |
| 799 | | |
| 800 | | Return Values : E_OK - success |
| 801 | | E_BAD_ARGUMENT - invalid form pointer |
| 802 | | E_SYSTEM_ERROR - form has no current field or |
| 803 | | field-window |
| 804 | +--------------------------------------------------------------------------*/ |
| 805 | NCURSES_EXPORT(int) |
| 806 | _nc_Position_Form_Cursor(FORM *form) |
| 807 | { |
| 808 | FIELD *field; |
| 809 | WINDOW *formwin; |
| 810 | |
| 811 | if (!form) |
| 812 | return (E_BAD_ARGUMENT); |
| 813 | |
| 814 | if (!form->w || !form->current) |
| 815 | return (E_SYSTEM_ERROR); |
| 816 | |
| 817 | field = form->current; |
| 818 | formwin = Get_Form_Window(form); |
| 819 | |
| 820 | wmove(form->w, form->currow, form->curcol); |
| 821 | if (Has_Invisible_Parts(field)) |
| 822 | { |
| 823 | /* in this case fieldwin isn't derived from formwin, so we have |
| 824 | to move the cursor in formwin by hand... */ |
| 825 | wmove(formwin, |
| 826 | field->frow + form->currow - form->toprow, |
| 827 | field->fcol + form->curcol - form->begincol); |
| 828 | wcursyncup(formwin); |
| 829 | } |
| 830 | else |
| 831 | wcursyncup(form->w); |
| 832 | return (E_OK); |
| 833 | } |
| 834 | |
| 835 | /*--------------------------------------------------------------------------- |
| 836 | | Facility : libnform |
| 837 | | Function : int _nc_Refresh_Current_Field(FORM * form) |
| 838 | | |
| 839 | | Description : Propagate the changes in the fields window to the |
| 840 | | window of the form. |
| 841 | | |
| 842 | | Return Values : E_OK - on success |
| 843 | | E_BAD_ARGUMENT - invalid form pointer |
| 844 | | E_SYSTEM_ERROR - general error |
| 845 | +--------------------------------------------------------------------------*/ |
| 846 | NCURSES_EXPORT(int) |
| 847 | _nc_Refresh_Current_Field(FORM *form) |
| 848 | { |
| 849 | WINDOW *formwin; |
| 850 | FIELD *field; |
| 851 | |
| 852 | T((T_CALLED("_nc_Refresh_Current_Field(%p)"), (void *)form)); |
| 853 | |
| 854 | if (!form) |
| 855 | RETURN(E_BAD_ARGUMENT); |
| 856 | |
| 857 | if (!form->w || !form->current) |
| 858 | RETURN(E_SYSTEM_ERROR); |
| 859 | |
| 860 | field = form->current; |
| 861 | formwin = Get_Form_Window(form); |
| 862 | |
| 863 | if (field->opts & O_PUBLIC) |
| 864 | { |
| 865 | if (Is_Scroll_Field(field)) |
| 866 | { |
| 867 | /* Again, in this case the fieldwin isn't derived from formwin, |
| 868 | so we have to perform a copy operation. */ |
| 869 | if (Single_Line_Field(field)) |
| 870 | { |
| 871 | /* horizontal scrolling */ |
| 872 | if (form->curcol < form->begincol) |
| 873 | form->begincol = form->curcol; |
| 874 | else |
| 875 | { |
| 876 | if (form->curcol >= (form->begincol + field->cols)) |
| 877 | form->begincol = form->curcol - field->cols + 1; |
| 878 | } |
| 879 | copywin(form->w, |
| 880 | formwin, |
| 881 | 0, |
| 882 | form->begincol, |
| 883 | field->frow, |
| 884 | field->fcol, |
| 885 | field->frow, |
| 886 | field->cols + field->fcol - 1, |
| 887 | 0); |
| 888 | } |
| 889 | else |
| 890 | { |
| 891 | /* A multi-line, i.e. vertical scrolling field */ |
| 892 | int row_after_bottom, first_modified_row, first_unmodified_row; |
| 893 | |
| 894 | if (field->drows > field->rows) |
| 895 | { |
| 896 | row_after_bottom = form->toprow + field->rows; |
| 897 | if (form->currow < form->toprow) |
| 898 | { |
| 899 | form->toprow = form->currow; |
| 900 | field->status |= _NEWTOP; |
| 901 | } |
| 902 | if (form->currow >= row_after_bottom) |
| 903 | { |
| 904 | form->toprow = form->currow - field->rows + 1; |
| 905 | field->status |= _NEWTOP; |
| 906 | } |
| 907 | if (field->status & _NEWTOP) |
| 908 | { |
| 909 | /* means we have to copy whole range */ |
| 910 | first_modified_row = form->toprow; |
| 911 | first_unmodified_row = first_modified_row + field->rows; |
| 912 | field->status &= ~_NEWTOP; |
| 913 | } |
| 914 | else |
| 915 | { |
| 916 | /* we try to optimize : finding the range of touched |
| 917 | lines */ |
| 918 | first_modified_row = form->toprow; |
| 919 | while (first_modified_row < row_after_bottom) |
| 920 | { |
| 921 | if (is_linetouched(form->w, first_modified_row)) |
| 922 | break; |
| 923 | first_modified_row++; |
| 924 | } |
| 925 | first_unmodified_row = first_modified_row; |
| 926 | while (first_unmodified_row < row_after_bottom) |
| 927 | { |
| 928 | if (!is_linetouched(form->w, first_unmodified_row)) |
| 929 | break; |
| 930 | first_unmodified_row++; |
| 931 | } |
| 932 | } |
| 933 | } |
| 934 | else |
| 935 | { |
| 936 | first_modified_row = form->toprow; |
| 937 | first_unmodified_row = first_modified_row + field->rows; |
| 938 | } |
| 939 | if (first_unmodified_row != first_modified_row) |
| 940 | copywin(form->w, |
| 941 | formwin, |
| 942 | first_modified_row, |
| 943 | 0, |
| 944 | field->frow + first_modified_row - form->toprow, |
| 945 | field->fcol, |
| 946 | field->frow + first_unmodified_row - form->toprow - 1, |
| 947 | field->cols + field->fcol - 1, |
| 948 | 0); |
| 949 | } |
| 950 | wsyncup(formwin); |
| 951 | } |
| 952 | else |
| 953 | { |
| 954 | /* if the field-window is simply a derived window, i.e. contains no |
| 955 | * invisible parts, the whole thing is trivial |
| 956 | */ |
| 957 | wsyncup(form->w); |
| 958 | } |
| 959 | } |
| 960 | untouchwin(form->w); |
| 961 | returnCode(_nc_Position_Form_Cursor(form)); |
| 962 | } |
| 963 | |
| 964 | /*--------------------------------------------------------------------------- |
| 965 | | Facility : libnform |
| 966 | | Function : static void Perform_Justification( |
| 967 | | FIELD * field, |
| 968 | | WINDOW * win) |
| 969 | | |
| 970 | | Description : Output field with requested justification |
| 971 | | |
| 972 | | Return Values : - |
| 973 | +--------------------------------------------------------------------------*/ |
| 974 | static void |
| 975 | Perform_Justification(FIELD *field, WINDOW *win) |
| 976 | { |
| 977 | FIELD_CELL *bp; |
| 978 | int len; |
| 979 | int col = 0; |
| 980 | |
| 981 | bp = Get_Start_Of_Data(field->buf, Buffer_Length(field)); |
| 982 | len = (int)(After_End_Of_Data(field->buf, Buffer_Length(field)) - bp); |
| 983 | |
| 984 | if (len > 0) |
| 985 | { |
| 986 | assert(win && (field->drows == 1) && (field->dcols == field->cols)); |
| 987 | |
| 988 | switch (field->just) |
| 989 | { |
| 990 | case JUSTIFY_LEFT: |
| 991 | break; |
| 992 | case JUSTIFY_CENTER: |
| 993 | col = (field->cols - len) / 2; |
| 994 | break; |
| 995 | case JUSTIFY_RIGHT: |
| 996 | col = field->cols - len; |
| 997 | break; |
| 998 | default: |
| 999 | break; |
| 1000 | } |
| 1001 | |
| 1002 | wmove(win, 0, col); |
| 1003 | myADDNSTR(win, bp, len); |
| 1004 | } |
| 1005 | } |
| 1006 | |
| 1007 | /*--------------------------------------------------------------------------- |
| 1008 | | Facility : libnform |
| 1009 | | Function : static void Undo_Justification( |
| 1010 | | FIELD * field, |
| 1011 | | WINDOW * win) |
| 1012 | | |
| 1013 | | Description : Display field without any justification, i.e. |
| 1014 | | left justified |
| 1015 | | |
| 1016 | | Return Values : - |
| 1017 | +--------------------------------------------------------------------------*/ |
| 1018 | static void |
| 1019 | Undo_Justification(FIELD *field, WINDOW *win) |
| 1020 | { |
| 1021 | FIELD_CELL *bp; |
| 1022 | int len; |
| 1023 | |
| 1024 | bp = Get_Start_Of_Data(field->buf, Buffer_Length(field)); |
| 1025 | len = (int)(After_End_Of_Data(field->buf, Buffer_Length(field)) - bp); |
| 1026 | |
| 1027 | if (len > 0) |
| 1028 | { |
| 1029 | assert(win); |
| 1030 | wmove(win, 0, 0); |
| 1031 | myADDNSTR(win, bp, len); |
| 1032 | } |
| 1033 | } |
| 1034 | |
| 1035 | /*--------------------------------------------------------------------------- |
| 1036 | | Facility : libnform |
| 1037 | | Function : static bool Check_Char(FORM *form, |
| 1038 | | FIELD *field, |
| 1039 | | FIELDTYPE * typ, |
| 1040 | | int ch, |
| 1041 | | TypeArgument *argp) |
| 1042 | | |
| 1043 | | Description : Perform a single character check for character ch |
| 1044 | | according to the fieldtype instance. |
| 1045 | | |
| 1046 | | Return Values : TRUE - Character is valid |
| 1047 | | FALSE - Character is invalid |
| 1048 | +--------------------------------------------------------------------------*/ |
| 1049 | static bool |
| 1050 | Check_Char(FORM *form, |
| 1051 | FIELD *field, |
| 1052 | FIELDTYPE *typ, |
| 1053 | int ch, |
| 1054 | TypeArgument *argp) |
| 1055 | { |
| 1056 | if (typ) |
| 1057 | { |
| 1058 | if (typ->status & _LINKED_TYPE) |
| 1059 | { |
| 1060 | assert(argp); |
| 1061 | return ( |
| 1062 | Check_Char(form, field, typ->left, ch, argp->left) || |
| 1063 | Check_Char(form, field, typ->right, ch, argp->right)); |
| 1064 | } |
| 1065 | else |
| 1066 | { |
| 1067 | #if NCURSES_INTEROP_FUNCS |
| 1068 | if (typ->charcheck.occheck) |
| 1069 | { |
| 1070 | if (typ->status & _GENERIC) |
| 1071 | return typ->charcheck.gccheck(ch, form, field, (void *)argp); |
| 1072 | else |
| 1073 | return typ->charcheck.occheck(ch, (void *)argp); |
| 1074 | } |
| 1075 | #else |
| 1076 | if (typ->ccheck) |
| 1077 | return typ->ccheck(ch, (void *)argp); |
| 1078 | #endif |
| 1079 | } |
| 1080 | } |
| 1081 | return (!iscntrl(UChar(ch)) ? TRUE : FALSE); |
| 1082 | } |
| 1083 | |
| 1084 | /*--------------------------------------------------------------------------- |
| 1085 | | Facility : libnform |
| 1086 | | Function : static int Display_Or_Erase_Field( |
| 1087 | | FIELD * field, |
| 1088 | | bool bEraseFlag) |
| 1089 | | |
| 1090 | | Description : Create a subwindow for the field and display the |
| 1091 | | buffer contents (apply justification if required) |
| 1092 | | or simply erase the field. |
| 1093 | | |
| 1094 | | Return Values : E_OK - on success |
| 1095 | | E_SYSTEM_ERROR - some error (typical no memory) |
| 1096 | +--------------------------------------------------------------------------*/ |
| 1097 | static int |
| 1098 | Display_Or_Erase_Field(FIELD *field, bool bEraseFlag) |
| 1099 | { |
| 1100 | WINDOW *win; |
| 1101 | WINDOW *fwin; |
| 1102 | |
| 1103 | if (!field) |
| 1104 | return E_SYSTEM_ERROR; |
| 1105 | |
| 1106 | fwin = Get_Form_Window(field->form); |
| 1107 | win = derwin(fwin, |
| 1108 | field->rows, field->cols, field->frow, field->fcol); |
| 1109 | |
| 1110 | if (!win) |
| 1111 | return E_SYSTEM_ERROR; |
| 1112 | else |
| 1113 | { |
| 1114 | if (field->opts & O_VISIBLE) |
| 1115 | { |
| 1116 | Set_Field_Window_Attributes(field, win); |
| 1117 | } |
| 1118 | else |
| 1119 | { |
| 1120 | (void)wattrset(win, WINDOW_ATTRS(fwin)); |
| 1121 | } |
| 1122 | werase(win); |
| 1123 | } |
| 1124 | |
| 1125 | if (!bEraseFlag) |
| 1126 | { |
| 1127 | if (field->opts & O_PUBLIC) |
| 1128 | { |
| 1129 | if (Justification_Allowed(field)) |
| 1130 | Perform_Justification(field, win); |
| 1131 | else |
| 1132 | Buffer_To_Window(field, win); |
| 1133 | } |
| 1134 | field->status &= ~_NEWTOP; |
| 1135 | } |
| 1136 | wsyncup(win); |
| 1137 | delwin(win); |
| 1138 | return E_OK; |
| 1139 | } |
| 1140 | |
| 1141 | /* Macros to preset the bEraseFlag */ |
| 1142 | #define Display_Field(field) Display_Or_Erase_Field(field,FALSE) |
| 1143 | #define Erase_Field(field) Display_Or_Erase_Field(field,TRUE) |
| 1144 | |
| 1145 | /*--------------------------------------------------------------------------- |
| 1146 | | Facility : libnform |
| 1147 | | Function : static int Synchronize_Field(FIELD * field) |
| 1148 | | |
| 1149 | | Description : Synchronize the windows content with the value in |
| 1150 | | the buffer. |
| 1151 | | |
| 1152 | | Return Values : E_OK - success |
| 1153 | | E_BAD_ARGUMENT - invalid field pointer |
| 1154 | | E_SYSTEM_ERROR - some severe basic error |
| 1155 | +--------------------------------------------------------------------------*/ |
| 1156 | static int |
| 1157 | Synchronize_Field(FIELD *field) |
| 1158 | { |
| 1159 | FORM *form; |
| 1160 | int res = E_OK; |
| 1161 | |
| 1162 | if (!field) |
| 1163 | return (E_BAD_ARGUMENT); |
| 1164 | |
| 1165 | if (((form = field->form) != (FORM *)0) |
| 1166 | && Field_Really_Appears(field)) |
| 1167 | { |
| 1168 | if (field == form->current) |
| 1169 | { |
| 1170 | form->currow = form->curcol = form->toprow = form->begincol = 0; |
| 1171 | werase(form->w); |
| 1172 | |
| 1173 | if ((field->opts & O_PUBLIC) && Justification_Allowed(field)) |
| 1174 | Undo_Justification(field, form->w); |
| 1175 | else |
| 1176 | Buffer_To_Window(field, form->w); |
| 1177 | |
| 1178 | field->status |= _NEWTOP; |
| 1179 | res = _nc_Refresh_Current_Field(form); |
| 1180 | } |
| 1181 | else |
| 1182 | res = Display_Field(field); |
| 1183 | } |
| 1184 | field->status |= _CHANGED; |
| 1185 | return (res); |
| 1186 | } |
| 1187 | |
| 1188 | /*--------------------------------------------------------------------------- |
| 1189 | | Facility : libnform |
| 1190 | | Function : static int Synchronize_Linked_Fields(FIELD * field) |
| 1191 | | |
| 1192 | | Description : Propagate the Synchronize_Field function to all linked |
| 1193 | | fields. The first error that occurs in the sequence |
| 1194 | | of updates is the return value. |
| 1195 | | |
| 1196 | | Return Values : E_OK - success |
| 1197 | | E_BAD_ARGUMENT - invalid field pointer |
| 1198 | | E_SYSTEM_ERROR - some severe basic error |
| 1199 | +--------------------------------------------------------------------------*/ |
| 1200 | static int |
| 1201 | Synchronize_Linked_Fields(FIELD *field) |
| 1202 | { |
| 1203 | FIELD *linked_field; |
| 1204 | int res = E_OK; |
| 1205 | int syncres; |
| 1206 | |
| 1207 | if (!field) |
| 1208 | return (E_BAD_ARGUMENT); |
| 1209 | |
| 1210 | if (!field->link) |
| 1211 | return (E_SYSTEM_ERROR); |
| 1212 | |
| 1213 | for (linked_field = field->link; |
| 1214 | linked_field != field; |
| 1215 | linked_field = linked_field->link) |
| 1216 | { |
| 1217 | if (((syncres = Synchronize_Field(linked_field)) != E_OK) && |
| 1218 | (res == E_OK)) |
| 1219 | res = syncres; |
| 1220 | } |
| 1221 | return (res); |
| 1222 | } |
| 1223 | |
| 1224 | /*--------------------------------------------------------------------------- |
| 1225 | | Facility : libnform |
| 1226 | | Function : int _nc_Synchronize_Attributes(FIELD * field) |
| 1227 | | |
| 1228 | | Description : If a fields visual attributes have changed, this |
| 1229 | | routine is called to propagate those changes to the |
| 1230 | | screen. |
| 1231 | | |
| 1232 | | Return Values : E_OK - success |
| 1233 | | E_BAD_ARGUMENT - invalid field pointer |
| 1234 | | E_SYSTEM_ERROR - some severe basic error |
| 1235 | +--------------------------------------------------------------------------*/ |
| 1236 | NCURSES_EXPORT(int) |
| 1237 | _nc_Synchronize_Attributes(FIELD *field) |
| 1238 | { |
| 1239 | FORM *form; |
| 1240 | int res = E_OK; |
| 1241 | WINDOW *formwin; |
| 1242 | |
| 1243 | T((T_CALLED("_nc_Synchronize_Attributes(%p)"), (void *)field)); |
| 1244 | |
| 1245 | if (!field) |
| 1246 | returnCode(E_BAD_ARGUMENT); |
| 1247 | |
| 1248 | CHECKPOS(field->form); |
| 1249 | if (((form = field->form) != (FORM *)0) |
| 1250 | && Field_Really_Appears(field)) |
| 1251 | { |
| 1252 | if (form->current == field) |
| 1253 | { |
| 1254 | Synchronize_Buffer(form); |
| 1255 | Set_Field_Window_Attributes(field, form->w); |
| 1256 | werase(form->w); |
| 1257 | wmove(form->w, form->currow, form->curcol); |
| 1258 | |
| 1259 | if (field->opts & O_PUBLIC) |
| 1260 | { |
| 1261 | if (Justification_Allowed(field)) |
| 1262 | Undo_Justification(field, form->w); |
| 1263 | else |
| 1264 | Buffer_To_Window(field, form->w); |
| 1265 | } |
| 1266 | else |
| 1267 | { |
| 1268 | formwin = Get_Form_Window(form); |
| 1269 | copywin(form->w, formwin, |
| 1270 | 0, 0, |
| 1271 | field->frow, field->fcol, |
| 1272 | field->rows - 1, field->cols - 1, 0); |
| 1273 | wsyncup(formwin); |
| 1274 | Buffer_To_Window(field, form->w); |
| 1275 | field->status |= _NEWTOP; /* fake refresh to paint all */ |
| 1276 | _nc_Refresh_Current_Field(form); |
| 1277 | } |
| 1278 | } |
| 1279 | else |
| 1280 | { |
| 1281 | res = Display_Field(field); |
| 1282 | } |
| 1283 | } |
| 1284 | CHECKPOS(form); |
| 1285 | returnCode(res); |
| 1286 | } |
| 1287 | |
| 1288 | /*--------------------------------------------------------------------------- |
| 1289 | | Facility : libnform |
| 1290 | | Function : int _nc_Synchronize_Options(FIELD * field, |
| 1291 | | Field_Options newopts) |
| 1292 | | |
| 1293 | | Description : If a fields options have changed, this routine is |
| 1294 | | called to propagate these changes to the screen and |
| 1295 | | to really change the behavior of the field. |
| 1296 | | |
| 1297 | | Return Values : E_OK - success |
| 1298 | | E_BAD_ARGUMENT - invalid field pointer |
| 1299 | | E_CURRENT - field is the current one |
| 1300 | | E_SYSTEM_ERROR - some severe basic error |
| 1301 | +--------------------------------------------------------------------------*/ |
| 1302 | NCURSES_EXPORT(int) |
| 1303 | _nc_Synchronize_Options(FIELD *field, Field_Options newopts) |
| 1304 | { |
| 1305 | Field_Options oldopts; |
| 1306 | Field_Options changed_opts; |
| 1307 | FORM *form; |
| 1308 | int res = E_OK; |
| 1309 | |
| 1310 | T((T_CALLED("_nc_Synchronize_Options(%p,%#x)"), (void *)field, newopts)); |
| 1311 | |
| 1312 | if (!field) |
| 1313 | returnCode(E_BAD_ARGUMENT); |
| 1314 | |
| 1315 | oldopts = field->opts; |
| 1316 | changed_opts = oldopts ^ newopts; |
| 1317 | field->opts = newopts; |
| 1318 | form = field->form; |
| 1319 | |
| 1320 | if (form) |
| 1321 | { |
| 1322 | if (form->status & _POSTED) |
| 1323 | { |
| 1324 | if (form->current == field) |
| 1325 | { |
| 1326 | field->opts = oldopts; |
| 1327 | returnCode(E_CURRENT); |
| 1328 | } |
| 1329 | if ((form->curpage == field->page)) |
| 1330 | { |
| 1331 | if (changed_opts & O_VISIBLE) |
| 1332 | { |
| 1333 | if (newopts & O_VISIBLE) |
| 1334 | res = Display_Field(field); |
| 1335 | else |
| 1336 | res = Erase_Field(field); |
| 1337 | } |
| 1338 | else |
| 1339 | { |
| 1340 | if ((changed_opts & O_PUBLIC) && |
| 1341 | (newopts & O_VISIBLE)) |
| 1342 | res = Display_Field(field); |
| 1343 | } |
| 1344 | } |
| 1345 | } |
| 1346 | } |
| 1347 | |
| 1348 | if (changed_opts & O_STATIC) |
| 1349 | { |
| 1350 | bool single_line_field = Single_Line_Field(field); |
| 1351 | int res2 = E_OK; |
| 1352 | |
| 1353 | if (newopts & O_STATIC) |
| 1354 | { |
| 1355 | /* the field becomes now static */ |
| 1356 | field->status &= ~_MAY_GROW; |
| 1357 | /* if actually we have no hidden columns, justification may |
| 1358 | occur again */ |
| 1359 | if (single_line_field && |
| 1360 | (field->cols == field->dcols) && |
| 1361 | (field->just != NO_JUSTIFICATION) && |
| 1362 | Field_Really_Appears(field)) |
| 1363 | { |
| 1364 | res2 = Display_Field(field); |
| 1365 | } |
| 1366 | } |
| 1367 | else |
| 1368 | { |
| 1369 | /* field is no longer static */ |
| 1370 | if ((field->maxgrow == 0) || |
| 1371 | (single_line_field && (field->dcols < field->maxgrow)) || |
| 1372 | (!single_line_field && (field->drows < field->maxgrow))) |
| 1373 | { |
| 1374 | field->status |= _MAY_GROW; |
| 1375 | /* a field with justification now changes its behavior, |
| 1376 | so we must redisplay it */ |
| 1377 | if (single_line_field && |
| 1378 | (field->just != NO_JUSTIFICATION) && |
| 1379 | Field_Really_Appears(field)) |
| 1380 | { |
| 1381 | res2 = Display_Field(field); |
| 1382 | } |
| 1383 | } |
| 1384 | } |
| 1385 | if (res2 != E_OK) |
| 1386 | res = res2; |
| 1387 | } |
| 1388 | |
| 1389 | returnCode(res); |
| 1390 | } |
| 1391 | |
| 1392 | /*--------------------------------------------------------------------------- |
| 1393 | | Facility : libnform |
| 1394 | | Function : int _nc_Set_Current_Field(FORM * form, |
| 1395 | | FIELD * newfield) |
| 1396 | | |
| 1397 | | Description : Make the newfield the new current field. |
| 1398 | | |
| 1399 | | Return Values : E_OK - success |
| 1400 | | E_BAD_ARGUMENT - invalid form or field pointer |
| 1401 | | E_SYSTEM_ERROR - some severe basic error |
| 1402 | | E_NOT_CONNECTED - no fields are connected to the form |
| 1403 | +--------------------------------------------------------------------------*/ |
| 1404 | NCURSES_EXPORT(int) |
| 1405 | _nc_Set_Current_Field(FORM *form, FIELD *newfield) |
| 1406 | { |
| 1407 | FIELD *field; |
| 1408 | WINDOW *new_window; |
| 1409 | |
| 1410 | T((T_CALLED("_nc_Set_Current_Field(%p,%p)"), (void *)form, (void *)newfield)); |
| 1411 | |
| 1412 | if (!form || !newfield || !form->current || (newfield->form != form)) |
| 1413 | returnCode(E_BAD_ARGUMENT); |
| 1414 | |
| 1415 | if ((form->status & _IN_DRIVER)) |
| 1416 | returnCode(E_BAD_STATE); |
| 1417 | |
| 1418 | if (!(form->field)) |
| 1419 | returnCode(E_NOT_CONNECTED); |
| 1420 | |
| 1421 | field = form->current; |
| 1422 | |
| 1423 | if ((field != newfield) || |
| 1424 | !(form->status & _POSTED)) |
| 1425 | { |
| 1426 | if ((form->w) && |
| 1427 | (field->opts & O_VISIBLE) && |
| 1428 | (field->form->curpage == field->page)) |
| 1429 | { |
| 1430 | _nc_Refresh_Current_Field(form); |
| 1431 | if (field->opts & O_PUBLIC) |
| 1432 | { |
| 1433 | if (field->drows > field->rows) |
| 1434 | { |
| 1435 | if (form->toprow == 0) |
| 1436 | field->status &= ~_NEWTOP; |
| 1437 | else |
| 1438 | field->status |= _NEWTOP; |
| 1439 | } |
| 1440 | else |
| 1441 | { |
| 1442 | if (Justification_Allowed(field)) |
| 1443 | { |
| 1444 | Window_To_Buffer(form, field); |
| 1445 | werase(form->w); |
| 1446 | Perform_Justification(field, form->w); |
| 1447 | wsyncup(form->w); |
| 1448 | } |
| 1449 | } |
| 1450 | } |
| 1451 | delwin(form->w); |
| 1452 | form->w = (WINDOW *)0; |
| 1453 | } |
| 1454 | |
| 1455 | field = newfield; |
| 1456 | |
| 1457 | if (Has_Invisible_Parts(field)) |
| 1458 | new_window = newpad(field->drows, field->dcols); |
| 1459 | else |
| 1460 | new_window = derwin(Get_Form_Window(form), |
| 1461 | field->rows, field->cols, field->frow, field->fcol); |
| 1462 | |
| 1463 | if (!new_window) |
| 1464 | returnCode(E_SYSTEM_ERROR); |
| 1465 | |
| 1466 | form->current = field; |
| 1467 | |
| 1468 | if (form->w) |
| 1469 | delwin(form->w); |
| 1470 | form->w = new_window; |
| 1471 | |
| 1472 | form->status &= ~_WINDOW_MODIFIED; |
| 1473 | Set_Field_Window_Attributes(field, form->w); |
| 1474 | |
| 1475 | if (Has_Invisible_Parts(field)) |
| 1476 | { |
| 1477 | werase(form->w); |
| 1478 | Buffer_To_Window(field, form->w); |
| 1479 | } |
| 1480 | else |
| 1481 | { |
| 1482 | if (Justification_Allowed(field)) |
| 1483 | { |
| 1484 | werase(form->w); |
| 1485 | Undo_Justification(field, form->w); |
| 1486 | wsyncup(form->w); |
| 1487 | } |
| 1488 | } |
| 1489 | |
| 1490 | untouchwin(form->w); |
| 1491 | } |
| 1492 | |
| 1493 | form->currow = form->curcol = form->toprow = form->begincol = 0; |
| 1494 | returnCode(E_OK); |
| 1495 | } |
| 1496 | |
| 1497 | /*---------------------------------------------------------------------------- |
| 1498 | Intra-Field Navigation routines |
| 1499 | --------------------------------------------------------------------------*/ |
| 1500 | |
| 1501 | /*--------------------------------------------------------------------------- |
| 1502 | | Facility : libnform |
| 1503 | | Function : static int IFN_Next_Character(FORM * form) |
| 1504 | | |
| 1505 | | Description : Move to the next character in the field. In a multi-line |
| 1506 | | field this wraps at the end of the line. |
| 1507 | | |
| 1508 | | Return Values : E_OK - success |
| 1509 | | E_REQUEST_DENIED - at the rightmost position |
| 1510 | +--------------------------------------------------------------------------*/ |
| 1511 | static int |
| 1512 | IFN_Next_Character(FORM *form) |
| 1513 | { |
| 1514 | FIELD *field = form->current; |
| 1515 | int step = myWCWIDTH(form->w, form->currow, form->curcol); |
| 1516 | |
| 1517 | T((T_CALLED("IFN_Next_Character(%p)"), (void *)form)); |
| 1518 | if ((form->curcol += step) == field->dcols) |
| 1519 | { |
| 1520 | if ((++(form->currow)) == field->drows) |
| 1521 | { |
| 1522 | #if GROW_IF_NAVIGATE |
| 1523 | if (!Single_Line_Field(field) && Field_Grown(field, 1)) |
| 1524 | { |
| 1525 | form->curcol = 0; |
| 1526 | returnCode(E_OK); |
| 1527 | } |
| 1528 | #endif |
| 1529 | form->currow--; |
| 1530 | #if GROW_IF_NAVIGATE |
| 1531 | if (Single_Line_Field(field) && Field_Grown(field, 1)) |
| 1532 | returnCode(E_OK); |
| 1533 | #endif |
| 1534 | form->curcol -= step; |
| 1535 | returnCode(E_REQUEST_DENIED); |
| 1536 | } |
| 1537 | form->curcol = 0; |
| 1538 | } |
| 1539 | returnCode(E_OK); |
| 1540 | } |
| 1541 | |
| 1542 | /*--------------------------------------------------------------------------- |
| 1543 | | Facility : libnform |
| 1544 | | Function : static int IFN_Previous_Character(FORM * form) |
| 1545 | | |
| 1546 | | Description : Move to the previous character in the field. In a |
| 1547 | | multi-line field this wraps and the beginning of the |
| 1548 | | line. |
| 1549 | | |
| 1550 | | Return Values : E_OK - success |
| 1551 | | E_REQUEST_DENIED - at the leftmost position |
| 1552 | +--------------------------------------------------------------------------*/ |
| 1553 | static int |
| 1554 | IFN_Previous_Character(FORM *form) |
| 1555 | { |
| 1556 | int amount = myWCWIDTH(form->w, form->currow, form->curcol - 1); |
| 1557 | int oldcol = form->curcol; |
| 1558 | |
| 1559 | T((T_CALLED("IFN_Previous_Character(%p)"), (void *)form)); |
| 1560 | if ((form->curcol -= amount) < 0) |
| 1561 | { |
| 1562 | if ((--(form->currow)) < 0) |
| 1563 | { |
| 1564 | form->currow++; |
| 1565 | form->curcol = oldcol; |
| 1566 | returnCode(E_REQUEST_DENIED); |
| 1567 | } |
| 1568 | form->curcol = form->current->dcols - 1; |
| 1569 | } |
| 1570 | returnCode(E_OK); |
| 1571 | } |
| 1572 | |
| 1573 | /*--------------------------------------------------------------------------- |
| 1574 | | Facility : libnform |
| 1575 | | Function : static int IFN_Next_Line(FORM * form) |
| 1576 | | |
| 1577 | | Description : Move to the beginning of the next line in the field |
| 1578 | | |
| 1579 | | Return Values : E_OK - success |
| 1580 | | E_REQUEST_DENIED - at the last line |
| 1581 | +--------------------------------------------------------------------------*/ |
| 1582 | static int |
| 1583 | IFN_Next_Line(FORM *form) |
| 1584 | { |
| 1585 | FIELD *field = form->current; |
| 1586 | |
| 1587 | T((T_CALLED("IFN_Next_Line(%p)"), (void *)form)); |
| 1588 | if ((++(form->currow)) == field->drows) |
| 1589 | { |
| 1590 | #if GROW_IF_NAVIGATE |
| 1591 | if (!Single_Line_Field(field) && Field_Grown(field, 1)) |
| 1592 | returnCode(E_OK); |
| 1593 | #endif |
| 1594 | form->currow--; |
| 1595 | returnCode(E_REQUEST_DENIED); |
| 1596 | } |
| 1597 | form->curcol = 0; |
| 1598 | returnCode(E_OK); |
| 1599 | } |
| 1600 | |
| 1601 | /*--------------------------------------------------------------------------- |
| 1602 | | Facility : libnform |
| 1603 | | Function : static int IFN_Previous_Line(FORM * form) |
| 1604 | | |
| 1605 | | Description : Move to the beginning of the previous line in the field |
| 1606 | | |
| 1607 | | Return Values : E_OK - success |
| 1608 | | E_REQUEST_DENIED - at the first line |
| 1609 | +--------------------------------------------------------------------------*/ |
| 1610 | static int |
| 1611 | IFN_Previous_Line(FORM *form) |
| 1612 | { |
| 1613 | T((T_CALLED("IFN_Previous_Line(%p)"), (void *)form)); |
| 1614 | if ((--(form->currow)) < 0) |
| 1615 | { |
| 1616 | form->currow++; |
| 1617 | returnCode(E_REQUEST_DENIED); |
| 1618 | } |
| 1619 | form->curcol = 0; |
| 1620 | returnCode(E_OK); |
| 1621 | } |
| 1622 | |
| 1623 | /*--------------------------------------------------------------------------- |
| 1624 | | Facility : libnform |
| 1625 | | Function : static int IFN_Next_Word(FORM * form) |
| 1626 | | |
| 1627 | | Description : Move to the beginning of the next word in the field. |
| 1628 | | |
| 1629 | | Return Values : E_OK - success |
| 1630 | | E_REQUEST_DENIED - there is no next word |
| 1631 | +--------------------------------------------------------------------------*/ |
| 1632 | static int |
| 1633 | IFN_Next_Word(FORM *form) |
| 1634 | { |
| 1635 | FIELD *field = form->current; |
| 1636 | FIELD_CELL *bp = Address_Of_Current_Position_In_Buffer(form); |
| 1637 | FIELD_CELL *s; |
| 1638 | FIELD_CELL *t; |
| 1639 | |
| 1640 | T((T_CALLED("IFN_Next_Word(%p)"), (void *)form)); |
| 1641 | |
| 1642 | /* We really need access to the data, so we have to synchronize */ |
| 1643 | Synchronize_Buffer(form); |
| 1644 | |
| 1645 | /* Go to the first whitespace after the current position (including |
| 1646 | current position). This is then the starting point to look for the |
| 1647 | next non-blank data */ |
| 1648 | s = Get_First_Whitespace_Character(bp, Buffer_Length(field) - |
| 1649 | (int)(bp - field->buf)); |
| 1650 | |
| 1651 | /* Find the start of the next word */ |
| 1652 | t = Get_Start_Of_Data(s, Buffer_Length(field) - |
| 1653 | (int)(s - field->buf)); |
| 1654 | #if !FRIENDLY_PREV_NEXT_WORD |
| 1655 | if (s == t) |
| 1656 | returnCode(E_REQUEST_DENIED); |
| 1657 | else |
| 1658 | #endif |
| 1659 | { |
| 1660 | Adjust_Cursor_Position(form, t); |
| 1661 | returnCode(E_OK); |
| 1662 | } |
| 1663 | } |
| 1664 | |
| 1665 | /*--------------------------------------------------------------------------- |
| 1666 | | Facility : libnform |
| 1667 | | Function : static int IFN_Previous_Word(FORM * form) |
| 1668 | | |
| 1669 | | Description : Move to the beginning of the previous word in the field. |
| 1670 | | |
| 1671 | | Return Values : E_OK - success |
| 1672 | | E_REQUEST_DENIED - there is no previous word |
| 1673 | +--------------------------------------------------------------------------*/ |
| 1674 | static int |
| 1675 | IFN_Previous_Word(FORM *form) |
| 1676 | { |
| 1677 | FIELD *field = form->current; |
| 1678 | FIELD_CELL *bp = Address_Of_Current_Position_In_Buffer(form); |
| 1679 | FIELD_CELL *s; |
| 1680 | FIELD_CELL *t; |
| 1681 | bool again = FALSE; |
| 1682 | |
| 1683 | T((T_CALLED("IFN_Previous_Word(%p)"), (void *)form)); |
| 1684 | |
| 1685 | /* We really need access to the data, so we have to synchronize */ |
| 1686 | Synchronize_Buffer(form); |
| 1687 | |
| 1688 | s = After_End_Of_Data(field->buf, (int)(bp - field->buf)); |
| 1689 | /* s points now right after the last non-blank in the buffer before bp. |
| 1690 | If bp was in a word, s equals bp. In this case we must find the last |
| 1691 | whitespace in the buffer before bp and repeat the game to really find |
| 1692 | the previous word! */ |
| 1693 | if (s == bp) |
| 1694 | again = TRUE; |
| 1695 | |
| 1696 | /* And next call now goes backward to look for the last whitespace |
| 1697 | before that, pointing right after this, so it points to the begin |
| 1698 | of the previous word. |
| 1699 | */ |
| 1700 | t = After_Last_Whitespace_Character(field->buf, (int)(s - field->buf)); |
| 1701 | #if !FRIENDLY_PREV_NEXT_WORD |
| 1702 | if (s == t) |
| 1703 | returnCode(E_REQUEST_DENIED); |
| 1704 | #endif |
| 1705 | if (again) |
| 1706 | { |
| 1707 | /* and do it again, replacing bp by t */ |
| 1708 | s = After_End_Of_Data(field->buf, (int)(t - field->buf)); |
| 1709 | t = After_Last_Whitespace_Character(field->buf, (int)(s - field->buf)); |
| 1710 | #if !FRIENDLY_PREV_NEXT_WORD |
| 1711 | if (s == t) |
| 1712 | returnCode(E_REQUEST_DENIED); |
| 1713 | #endif |
| 1714 | } |
| 1715 | Adjust_Cursor_Position(form, t); |
| 1716 | returnCode(E_OK); |
| 1717 | } |
| 1718 | |
| 1719 | /*--------------------------------------------------------------------------- |
| 1720 | | Facility : libnform |
| 1721 | | Function : static int IFN_Beginning_Of_Field(FORM * form) |
| 1722 | | |
| 1723 | | Description : Place the cursor at the first non-pad character in |
| 1724 | | the field. |
| 1725 | | |
| 1726 | | Return Values : E_OK - success |
| 1727 | +--------------------------------------------------------------------------*/ |
| 1728 | static int |
| 1729 | IFN_Beginning_Of_Field(FORM *form) |
| 1730 | { |
| 1731 | FIELD *field = form->current; |
| 1732 | |
| 1733 | T((T_CALLED("IFN_Beginning_Of_Field(%p)"), (void *)form)); |
| 1734 | Synchronize_Buffer(form); |
| 1735 | Adjust_Cursor_Position(form, |
| 1736 | Get_Start_Of_Data(field->buf, Buffer_Length(field))); |
| 1737 | returnCode(E_OK); |
| 1738 | } |
| 1739 | |
| 1740 | /*--------------------------------------------------------------------------- |
| 1741 | | Facility : libnform |
| 1742 | | Function : static int IFN_End_Of_Field(FORM * form) |
| 1743 | | |
| 1744 | | Description : Place the cursor after the last non-pad character in |
| 1745 | | the field. If the field occupies the last position in |
| 1746 | | the buffer, the cursor is positioned on the last |
| 1747 | | character. |
| 1748 | | |
| 1749 | | Return Values : E_OK - success |
| 1750 | +--------------------------------------------------------------------------*/ |
| 1751 | static int |
| 1752 | IFN_End_Of_Field(FORM *form) |
| 1753 | { |
| 1754 | FIELD *field = form->current; |
| 1755 | FIELD_CELL *pos; |
| 1756 | |
| 1757 | T((T_CALLED("IFN_End_Of_Field(%p)"), (void *)form)); |
| 1758 | Synchronize_Buffer(form); |
| 1759 | pos = After_End_Of_Data(field->buf, Buffer_Length(field)); |
| 1760 | if (pos == (field->buf + Buffer_Length(field))) |
| 1761 | pos--; |
| 1762 | Adjust_Cursor_Position(form, pos); |
| 1763 | returnCode(E_OK); |
| 1764 | } |
| 1765 | |
| 1766 | /*--------------------------------------------------------------------------- |
| 1767 | | Facility : libnform |
| 1768 | | Function : static int IFN_Beginning_Of_Line(FORM * form) |
| 1769 | | |
| 1770 | | Description : Place the cursor on the first non-pad character in |
| 1771 | | the current line of the field. |
| 1772 | | |
| 1773 | | Return Values : E_OK - success |
| 1774 | +--------------------------------------------------------------------------*/ |
| 1775 | static int |
| 1776 | IFN_Beginning_Of_Line(FORM *form) |
| 1777 | { |
| 1778 | FIELD *field = form->current; |
| 1779 | |
| 1780 | T((T_CALLED("IFN_Beginning_Of_Line(%p)"), (void *)form)); |
| 1781 | Synchronize_Buffer(form); |
| 1782 | Adjust_Cursor_Position(form, |
| 1783 | Get_Start_Of_Data(Address_Of_Current_Row_In_Buffer(form), |
| 1784 | field->dcols)); |
| 1785 | returnCode(E_OK); |
| 1786 | } |
| 1787 | |
| 1788 | /*--------------------------------------------------------------------------- |
| 1789 | | Facility : libnform |
| 1790 | | Function : static int IFN_End_Of_Line(FORM * form) |
| 1791 | | |
| 1792 | | Description : Place the cursor after the last non-pad character in the |
| 1793 | | current line of the field. If the field occupies the |
| 1794 | | last column in the line, the cursor is positioned on the |
| 1795 | | last character of the line. |
| 1796 | | |
| 1797 | | Return Values : E_OK - success |
| 1798 | +--------------------------------------------------------------------------*/ |
| 1799 | static int |
| 1800 | IFN_End_Of_Line(FORM *form) |
| 1801 | { |
| 1802 | FIELD *field = form->current; |
| 1803 | FIELD_CELL *pos; |
| 1804 | FIELD_CELL *bp; |
| 1805 | |
| 1806 | T((T_CALLED("IFN_End_Of_Line(%p)"), (void *)form)); |
| 1807 | Synchronize_Buffer(form); |
| 1808 | bp = Address_Of_Current_Row_In_Buffer(form); |
| 1809 | pos = After_End_Of_Data(bp, field->dcols); |
| 1810 | if (pos == (bp + field->dcols)) |
| 1811 | pos--; |
| 1812 | Adjust_Cursor_Position(form, pos); |
| 1813 | returnCode(E_OK); |
| 1814 | } |
| 1815 | |
| 1816 | /*--------------------------------------------------------------------------- |
| 1817 | | Facility : libnform |
| 1818 | | Function : static int IFN_Left_Character(FORM * form) |
| 1819 | | |
| 1820 | | Description : Move one character to the left in the current line. |
| 1821 | | This doesn't cycle. |
| 1822 | | |
| 1823 | | Return Values : E_OK - success |
| 1824 | | E_REQUEST_DENIED - already in first column |
| 1825 | +--------------------------------------------------------------------------*/ |
| 1826 | static int |
| 1827 | IFN_Left_Character(FORM *form) |
| 1828 | { |
| 1829 | int amount = myWCWIDTH(form->w, form->currow, form->curcol - 1); |
| 1830 | int oldcol = form->curcol; |
| 1831 | |
| 1832 | T((T_CALLED("IFN_Left_Character(%p)"), (void *)form)); |
| 1833 | if ((form->curcol -= amount) < 0) |
| 1834 | { |
| 1835 | form->curcol = oldcol; |
| 1836 | returnCode(E_REQUEST_DENIED); |
| 1837 | } |
| 1838 | returnCode(E_OK); |
| 1839 | } |
| 1840 | |
| 1841 | /*--------------------------------------------------------------------------- |
| 1842 | | Facility : libnform |
| 1843 | | Function : static int IFN_Right_Character(FORM * form) |
| 1844 | | |
| 1845 | | Description : Move one character to the right in the current line. |
| 1846 | | This doesn't cycle. |
| 1847 | | |
| 1848 | | Return Values : E_OK - success |
| 1849 | | E_REQUEST_DENIED - already in last column |
| 1850 | +--------------------------------------------------------------------------*/ |
| 1851 | static int |
| 1852 | IFN_Right_Character(FORM *form) |
| 1853 | { |
| 1854 | int amount = myWCWIDTH(form->w, form->currow, form->curcol); |
| 1855 | int oldcol = form->curcol; |
| 1856 | |
| 1857 | T((T_CALLED("IFN_Right_Character(%p)"), (void *)form)); |
| 1858 | if ((form->curcol += amount) >= form->current->dcols) |
| 1859 | { |
| 1860 | #if GROW_IF_NAVIGATE |
| 1861 | FIELD *field = form->current; |
| 1862 | |
| 1863 | if (Single_Line_Field(field) && Field_Grown(field, 1)) |
| 1864 | returnCode(E_OK); |
| 1865 | #endif |
| 1866 | form->curcol = oldcol; |
| 1867 | returnCode(E_REQUEST_DENIED); |
| 1868 | } |
| 1869 | returnCode(E_OK); |
| 1870 | } |
| 1871 | |
| 1872 | /*--------------------------------------------------------------------------- |
| 1873 | | Facility : libnform |
| 1874 | | Function : static int IFN_Up_Character(FORM * form) |
| 1875 | | |
| 1876 | | Description : Move one line up. This doesn't cycle through the lines |
| 1877 | | of the field. |
| 1878 | | |
| 1879 | | Return Values : E_OK - success |
| 1880 | | E_REQUEST_DENIED - already in last column |
| 1881 | +--------------------------------------------------------------------------*/ |
| 1882 | static int |
| 1883 | IFN_Up_Character(FORM *form) |
| 1884 | { |
| 1885 | T((T_CALLED("IFN_Up_Character(%p)"), (void *)form)); |
| 1886 | if ((--(form->currow)) < 0) |
| 1887 | { |
| 1888 | form->currow++; |
| 1889 | returnCode(E_REQUEST_DENIED); |
| 1890 | } |
| 1891 | returnCode(E_OK); |
| 1892 | } |
| 1893 | |
| 1894 | /*--------------------------------------------------------------------------- |
| 1895 | | Facility : libnform |
| 1896 | | Function : static int IFN_Down_Character(FORM * form) |
| 1897 | | |
| 1898 | | Description : Move one line down. This doesn't cycle through the |
| 1899 | | lines of the field. |
| 1900 | | |
| 1901 | | Return Values : E_OK - success |
| 1902 | | E_REQUEST_DENIED - already in last column |
| 1903 | +--------------------------------------------------------------------------*/ |
| 1904 | static int |
| 1905 | IFN_Down_Character(FORM *form) |
| 1906 | { |
| 1907 | FIELD *field = form->current; |
| 1908 | |
| 1909 | T((T_CALLED("IFN_Down_Character(%p)"), (void *)form)); |
| 1910 | if ((++(form->currow)) == field->drows) |
| 1911 | { |
| 1912 | #if GROW_IF_NAVIGATE |
| 1913 | if (!Single_Line_Field(field) && Field_Grown(field, 1)) |
| 1914 | returnCode(E_OK); |
| 1915 | #endif |
| 1916 | --(form->currow); |
| 1917 | returnCode(E_REQUEST_DENIED); |
| 1918 | } |
| 1919 | returnCode(E_OK); |
| 1920 | } |
| 1921 | /*---------------------------------------------------------------------------- |
| 1922 | END of Intra-Field Navigation routines |
| 1923 | --------------------------------------------------------------------------*/ |
| 1924 | |
| 1925 | /*---------------------------------------------------------------------------- |
| 1926 | Vertical scrolling helper routines |
| 1927 | --------------------------------------------------------------------------*/ |
| 1928 | |
| 1929 | /*--------------------------------------------------------------------------- |
| 1930 | | Facility : libnform |
| 1931 | | Function : static int VSC_Generic(FORM *form, int nlines) |
| 1932 | | |
| 1933 | | Description : Scroll multi-line field forward (nlines>0) or |
| 1934 | | backward (nlines<0) this many lines. |
| 1935 | | |
| 1936 | | Return Values : E_OK - success |
| 1937 | | E_REQUEST_DENIED - can't scroll |
| 1938 | +--------------------------------------------------------------------------*/ |
| 1939 | static int |
| 1940 | VSC_Generic(FORM *form, int nlines) |
| 1941 | { |
| 1942 | FIELD *field = form->current; |
| 1943 | int res = E_REQUEST_DENIED; |
| 1944 | int rows_to_go = (nlines > 0 ? nlines : -nlines); |
| 1945 | |
| 1946 | if (nlines > 0) |
| 1947 | { |
| 1948 | if ((rows_to_go + form->toprow) > (field->drows - field->rows)) |
| 1949 | rows_to_go = (field->drows - field->rows - form->toprow); |
| 1950 | |
| 1951 | if (rows_to_go > 0) |
| 1952 | { |
| 1953 | form->currow += rows_to_go; |
| 1954 | form->toprow += rows_to_go; |
| 1955 | res = E_OK; |
| 1956 | } |
| 1957 | } |
| 1958 | else |
| 1959 | { |
| 1960 | if (rows_to_go > form->toprow) |
| 1961 | rows_to_go = form->toprow; |
| 1962 | |
| 1963 | if (rows_to_go > 0) |
| 1964 | { |
| 1965 | form->currow -= rows_to_go; |
| 1966 | form->toprow -= rows_to_go; |
| 1967 | res = E_OK; |
| 1968 | } |
| 1969 | } |
| 1970 | return (res); |
| 1971 | } |
| 1972 | /*---------------------------------------------------------------------------- |
| 1973 | End of Vertical scrolling helper routines |
| 1974 | --------------------------------------------------------------------------*/ |
| 1975 | |
| 1976 | /*---------------------------------------------------------------------------- |
| 1977 | Vertical scrolling routines |
| 1978 | --------------------------------------------------------------------------*/ |
| 1979 | |
| 1980 | /*--------------------------------------------------------------------------- |
| 1981 | | Facility : libnform |
| 1982 | | Function : static int Vertical_Scrolling( |
| 1983 | | int (* const fct) (FORM *), |
| 1984 | | FORM * form) |
| 1985 | | |
| 1986 | | Description : Performs the generic vertical scrolling routines. |
| 1987 | | This has to check for a multi-line field and to set |
| 1988 | | the _NEWTOP flag if scrolling really occurred. |
| 1989 | | |
| 1990 | | Return Values : Propagated error code from low-level driver calls |
| 1991 | +--------------------------------------------------------------------------*/ |
| 1992 | static int |
| 1993 | Vertical_Scrolling(int (*const fct) (FORM *), FORM *form) |
| 1994 | { |
| 1995 | int res = E_REQUEST_DENIED; |
| 1996 | |
| 1997 | if (!Single_Line_Field(form->current)) |
| 1998 | { |
| 1999 | res = fct(form); |
| 2000 | if (res == E_OK) |
| 2001 | form->current->status |= _NEWTOP; |
| 2002 | } |
| 2003 | return (res); |
| 2004 | } |
| 2005 | |
| 2006 | /*--------------------------------------------------------------------------- |
| 2007 | | Facility : libnform |
| 2008 | | Function : static int VSC_Scroll_Line_Forward(FORM * form) |
| 2009 | | |
| 2010 | | Description : Scroll multi-line field forward a line |
| 2011 | | |
| 2012 | | Return Values : E_OK - success |
| 2013 | | E_REQUEST_DENIED - no data ahead |
| 2014 | +--------------------------------------------------------------------------*/ |
| 2015 | static int |
| 2016 | VSC_Scroll_Line_Forward(FORM *form) |
| 2017 | { |
| 2018 | T((T_CALLED("VSC_Scroll_Line_Forward(%p)"), (void *)form)); |
| 2019 | returnCode(VSC_Generic(form, 1)); |
| 2020 | } |
| 2021 | |
| 2022 | /*--------------------------------------------------------------------------- |
| 2023 | | Facility : libnform |
| 2024 | | Function : static int VSC_Scroll_Line_Backward(FORM * form) |
| 2025 | | |
| 2026 | | Description : Scroll multi-line field backward a line |
| 2027 | | |
| 2028 | | Return Values : E_OK - success |
| 2029 | | E_REQUEST_DENIED - no data behind |
| 2030 | +--------------------------------------------------------------------------*/ |
| 2031 | static int |
| 2032 | VSC_Scroll_Line_Backward(FORM *form) |
| 2033 | { |
| 2034 | T((T_CALLED("VSC_Scroll_Line_Backward(%p)"), (void *)form)); |
| 2035 | returnCode(VSC_Generic(form, -1)); |
| 2036 | } |
| 2037 | |
| 2038 | /*--------------------------------------------------------------------------- |
| 2039 | | Facility : libnform |
| 2040 | | Function : static int VSC_Scroll_Page_Forward(FORM * form) |
| 2041 | | |
| 2042 | | Description : Scroll a multi-line field forward a page |
| 2043 | | |
| 2044 | | Return Values : E_OK - success |
| 2045 | | E_REQUEST_DENIED - no data ahead |
| 2046 | +--------------------------------------------------------------------------*/ |
| 2047 | static int |
| 2048 | VSC_Scroll_Page_Forward(FORM *form) |
| 2049 | { |
| 2050 | T((T_CALLED("VSC_Scroll_Page_Forward(%p)"), (void *)form)); |
| 2051 | returnCode(VSC_Generic(form, form->current->rows)); |
| 2052 | } |
| 2053 | |
| 2054 | /*--------------------------------------------------------------------------- |
| 2055 | | Facility : libnform |
| 2056 | | Function : static int VSC_Scroll_Half_Page_Forward(FORM * form) |
| 2057 | | |
| 2058 | | Description : Scroll a multi-line field forward half a page |
| 2059 | | |
| 2060 | | Return Values : E_OK - success |
| 2061 | | E_REQUEST_DENIED - no data ahead |
| 2062 | +--------------------------------------------------------------------------*/ |
| 2063 | static int |
| 2064 | VSC_Scroll_Half_Page_Forward(FORM *form) |
| 2065 | { |
| 2066 | T((T_CALLED("VSC_Scroll_Half_Page_Forward(%p)"), (void *)form)); |
| 2067 | returnCode(VSC_Generic(form, (form->current->rows + 1) / 2)); |
| 2068 | } |
| 2069 | |
| 2070 | /*--------------------------------------------------------------------------- |
| 2071 | | Facility : libnform |
| 2072 | | Function : static int VSC_Scroll_Page_Backward(FORM * form) |
| 2073 | | |
| 2074 | | Description : Scroll a multi-line field backward a page |
| 2075 | | |
| 2076 | | Return Values : E_OK - success |
| 2077 | | E_REQUEST_DENIED - no data behind |
| 2078 | +--------------------------------------------------------------------------*/ |
| 2079 | static int |
| 2080 | VSC_Scroll_Page_Backward(FORM *form) |
| 2081 | { |
| 2082 | T((T_CALLED("VSC_Scroll_Page_Backward(%p)"), (void *)form)); |
| 2083 | returnCode(VSC_Generic(form, -(form->current->rows))); |
| 2084 | } |
| 2085 | |
| 2086 | /*--------------------------------------------------------------------------- |
| 2087 | | Facility : libnform |
| 2088 | | Function : static int VSC_Scroll_Half_Page_Backward(FORM * form) |
| 2089 | | |
| 2090 | | Description : Scroll a multi-line field backward half a page |
| 2091 | | |
| 2092 | | Return Values : E_OK - success |
| 2093 | | E_REQUEST_DENIED - no data behind |
| 2094 | +--------------------------------------------------------------------------*/ |
| 2095 | static int |
| 2096 | VSC_Scroll_Half_Page_Backward(FORM *form) |
| 2097 | { |
| 2098 | T((T_CALLED("VSC_Scroll_Half_Page_Backward(%p)"), (void *)form)); |
| 2099 | returnCode(VSC_Generic(form, -((form->current->rows + 1) / 2))); |
| 2100 | } |
| 2101 | /*---------------------------------------------------------------------------- |
| 2102 | End of Vertical scrolling routines |
| 2103 | --------------------------------------------------------------------------*/ |
| 2104 | |
| 2105 | /*---------------------------------------------------------------------------- |
| 2106 | Horizontal scrolling helper routines |
| 2107 | --------------------------------------------------------------------------*/ |
| 2108 | |
| 2109 | /*--------------------------------------------------------------------------- |
| 2110 | | Facility : libnform |
| 2111 | | Function : static int HSC_Generic(FORM *form, int ncolumns) |
| 2112 | | |
| 2113 | | Description : Scroll single-line field forward (ncolumns>0) or |
| 2114 | | backward (ncolumns<0) this many columns. |
| 2115 | | |
| 2116 | | Return Values : E_OK - success |
| 2117 | | E_REQUEST_DENIED - can't scroll |
| 2118 | +--------------------------------------------------------------------------*/ |
| 2119 | static int |
| 2120 | HSC_Generic(FORM *form, int ncolumns) |
| 2121 | { |
| 2122 | FIELD *field = form->current; |
| 2123 | int res = E_REQUEST_DENIED; |
| 2124 | int cols_to_go = (ncolumns > 0 ? ncolumns : -ncolumns); |
| 2125 | |
| 2126 | if (ncolumns > 0) |
| 2127 | { |
| 2128 | if ((cols_to_go + form->begincol) > (field->dcols - field->cols)) |
| 2129 | cols_to_go = field->dcols - field->cols - form->begincol; |
| 2130 | |
| 2131 | if (cols_to_go > 0) |
| 2132 | { |
| 2133 | form->curcol += cols_to_go; |
| 2134 | form->begincol += cols_to_go; |
| 2135 | res = E_OK; |
| 2136 | } |
| 2137 | } |
| 2138 | else |
| 2139 | { |
| 2140 | if (cols_to_go > form->begincol) |
| 2141 | cols_to_go = form->begincol; |
| 2142 | |
| 2143 | if (cols_to_go > 0) |
| 2144 | { |
| 2145 | form->curcol -= cols_to_go; |
| 2146 | form->begincol -= cols_to_go; |
| 2147 | res = E_OK; |
| 2148 | } |
| 2149 | } |
| 2150 | return (res); |
| 2151 | } |
| 2152 | /*---------------------------------------------------------------------------- |
| 2153 | End of Horizontal scrolling helper routines |
| 2154 | --------------------------------------------------------------------------*/ |
| 2155 | |
| 2156 | /*---------------------------------------------------------------------------- |
| 2157 | Horizontal scrolling routines |
| 2158 | --------------------------------------------------------------------------*/ |
| 2159 | |
| 2160 | /*--------------------------------------------------------------------------- |
| 2161 | | Facility : libnform |
| 2162 | | Function : static int Horizontal_Scrolling( |
| 2163 | | int (* const fct) (FORM *), |
| 2164 | | FORM * form) |
| 2165 | | |
| 2166 | | Description : Performs the generic horizontal scrolling routines. |
| 2167 | | This has to check for a single-line field. |
| 2168 | | |
| 2169 | | Return Values : Propagated error code from low-level driver calls |
| 2170 | +--------------------------------------------------------------------------*/ |
| 2171 | static int |
| 2172 | Horizontal_Scrolling(int (*const fct) (FORM *), FORM *form) |
| 2173 | { |
| 2174 | if (Single_Line_Field(form->current)) |
| 2175 | return fct(form); |
| 2176 | else |
| 2177 | return (E_REQUEST_DENIED); |
| 2178 | } |
| 2179 | |
| 2180 | /*--------------------------------------------------------------------------- |
| 2181 | | Facility : libnform |
| 2182 | | Function : static int HSC_Scroll_Char_Forward(FORM * form) |
| 2183 | | |
| 2184 | | Description : Scroll single-line field forward a character |
| 2185 | | |
| 2186 | | Return Values : E_OK - success |
| 2187 | | E_REQUEST_DENIED - no data ahead |
| 2188 | +--------------------------------------------------------------------------*/ |
| 2189 | static int |
| 2190 | HSC_Scroll_Char_Forward(FORM *form) |
| 2191 | { |
| 2192 | T((T_CALLED("HSC_Scroll_Char_Forward(%p)"), (void *)form)); |
| 2193 | returnCode(HSC_Generic(form, 1)); |
| 2194 | } |
| 2195 | |
| 2196 | /*--------------------------------------------------------------------------- |
| 2197 | | Facility : libnform |
| 2198 | | Function : static int HSC_Scroll_Char_Backward(FORM * form) |
| 2199 | | |
| 2200 | | Description : Scroll single-line field backward a character |
| 2201 | | |
| 2202 | | Return Values : E_OK - success |
| 2203 | | E_REQUEST_DENIED - no data behind |
| 2204 | +--------------------------------------------------------------------------*/ |
| 2205 | static int |
| 2206 | HSC_Scroll_Char_Backward(FORM *form) |
| 2207 | { |
| 2208 | T((T_CALLED("HSC_Scroll_Char_Backward(%p)"), (void *)form)); |
| 2209 | returnCode(HSC_Generic(form, -1)); |
| 2210 | } |
| 2211 | |
| 2212 | /*--------------------------------------------------------------------------- |
| 2213 | | Facility : libnform |
| 2214 | | Function : static int HSC_Horizontal_Line_Forward(FORM* form) |
| 2215 | | |
| 2216 | | Description : Scroll single-line field forward a line |
| 2217 | | |
| 2218 | | Return Values : E_OK - success |
| 2219 | | E_REQUEST_DENIED - no data ahead |
| 2220 | +--------------------------------------------------------------------------*/ |
| 2221 | static int |
| 2222 | HSC_Horizontal_Line_Forward(FORM *form) |
| 2223 | { |
| 2224 | T((T_CALLED("HSC_Horizontal_Line_Forward(%p)"), (void *)form)); |
| 2225 | returnCode(HSC_Generic(form, form->current->cols)); |
| 2226 | } |
| 2227 | |
| 2228 | /*--------------------------------------------------------------------------- |
| 2229 | | Facility : libnform |
| 2230 | | Function : static int HSC_Horizontal_Half_Line_Forward(FORM* form) |
| 2231 | | |
| 2232 | | Description : Scroll single-line field forward half a line |
| 2233 | | |
| 2234 | | Return Values : E_OK - success |
| 2235 | | E_REQUEST_DENIED - no data ahead |
| 2236 | +--------------------------------------------------------------------------*/ |
| 2237 | static int |
| 2238 | HSC_Horizontal_Half_Line_Forward(FORM *form) |
| 2239 | { |
| 2240 | T((T_CALLED("HSC_Horizontal_Half_Line_Forward(%p)"), (void *)form)); |
| 2241 | returnCode(HSC_Generic(form, (form->current->cols + 1) / 2)); |
| 2242 | } |
| 2243 | |
| 2244 | /*--------------------------------------------------------------------------- |
| 2245 | | Facility : libnform |
| 2246 | | Function : static int HSC_Horizontal_Line_Backward(FORM* form) |
| 2247 | | |
| 2248 | | Description : Scroll single-line field backward a line |
| 2249 | | |
| 2250 | | Return Values : E_OK - success |
| 2251 | | E_REQUEST_DENIED - no data behind |
| 2252 | +--------------------------------------------------------------------------*/ |
| 2253 | static int |
| 2254 | HSC_Horizontal_Line_Backward(FORM *form) |
| 2255 | { |
| 2256 | T((T_CALLED("HSC_Horizontal_Line_Backward(%p)"), (void *)form)); |
| 2257 | returnCode(HSC_Generic(form, -(form->current->cols))); |
| 2258 | } |
| 2259 | |
| 2260 | /*--------------------------------------------------------------------------- |
| 2261 | | Facility : libnform |
| 2262 | | Function : static int HSC_Horizontal_Half_Line_Backward(FORM* form) |
| 2263 | | |
| 2264 | | Description : Scroll single-line field backward half a line |
| 2265 | | |
| 2266 | | Return Values : E_OK - success |
| 2267 | | E_REQUEST_DENIED - no data behind |
| 2268 | +--------------------------------------------------------------------------*/ |
| 2269 | static int |
| 2270 | HSC_Horizontal_Half_Line_Backward(FORM *form) |
| 2271 | { |
| 2272 | T((T_CALLED("HSC_Horizontal_Half_Line_Backward(%p)"), (void *)form)); |
| 2273 | returnCode(HSC_Generic(form, -((form->current->cols + 1) / 2))); |
| 2274 | } |
| 2275 | |
| 2276 | /*---------------------------------------------------------------------------- |
| 2277 | End of Horizontal scrolling routines |
| 2278 | --------------------------------------------------------------------------*/ |
| 2279 | |
| 2280 | /*---------------------------------------------------------------------------- |
| 2281 | Helper routines for Field Editing |
| 2282 | --------------------------------------------------------------------------*/ |
| 2283 | |
| 2284 | /*--------------------------------------------------------------------------- |
| 2285 | | Facility : libnform |
| 2286 | | Function : static bool Is_There_Room_For_A_Line(FORM * form) |
| 2287 | | |
| 2288 | | Description : Check whether or not there is enough room in the |
| 2289 | | buffer to enter a whole line. |
| 2290 | | |
| 2291 | | Return Values : TRUE - there is enough space |
| 2292 | | FALSE - there is not enough space |
| 2293 | +--------------------------------------------------------------------------*/ |
| 2294 | NCURSES_INLINE static bool |
| 2295 | Is_There_Room_For_A_Line(FORM *form) |
| 2296 | { |
| 2297 | FIELD *field = form->current; |
| 2298 | FIELD_CELL *begin_of_last_line, *s; |
| 2299 | |
| 2300 | Synchronize_Buffer(form); |
| 2301 | begin_of_last_line = Address_Of_Row_In_Buffer(field, (field->drows - 1)); |
| 2302 | s = After_End_Of_Data(begin_of_last_line, field->dcols); |
| 2303 | return ((s == begin_of_last_line) ? TRUE : FALSE); |
| 2304 | } |
| 2305 | |
| 2306 | /*--------------------------------------------------------------------------- |
| 2307 | | Facility : libnform |
| 2308 | | Function : static bool Is_There_Room_For_A_Char_In_Line(FORM * form) |
| 2309 | | |
| 2310 | | Description : Checks whether or not there is room for a new character |
| 2311 | | in the current line. |
| 2312 | | |
| 2313 | | Return Values : TRUE - there is room |
| 2314 | | FALSE - there is not enough room (line full) |
| 2315 | +--------------------------------------------------------------------------*/ |
| 2316 | NCURSES_INLINE static bool |
| 2317 | Is_There_Room_For_A_Char_In_Line(FORM *form) |
| 2318 | { |
| 2319 | int last_char_in_line; |
| 2320 | |
| 2321 | wmove(form->w, form->currow, form->current->dcols - 1); |
| 2322 | last_char_in_line = (int)(winch(form->w) & A_CHARTEXT); |
| 2323 | wmove(form->w, form->currow, form->curcol); |
| 2324 | return (((last_char_in_line == form->current->pad) || |
| 2325 | is_blank(last_char_in_line)) ? TRUE : FALSE); |
| 2326 | } |
| 2327 | |
| 2328 | #define There_Is_No_Room_For_A_Char_In_Line(f) \ |
| 2329 | !Is_There_Room_For_A_Char_In_Line(f) |
| 2330 | |
| 2331 | /*--------------------------------------------------------------------------- |
| 2332 | | Facility : libnform |
| 2333 | | Function : static int Insert_String( |
| 2334 | | FORM * form, |
| 2335 | | int row, |
| 2336 | | char *txt, |
| 2337 | | int len ) |
| 2338 | | |
| 2339 | | Description : Insert the 'len' characters beginning at pointer 'txt' |
| 2340 | | into the 'row' of the 'form'. The insertion occurs |
| 2341 | | on the beginning of the row, all other characters are |
| 2342 | | moved to the right. After the text a pad character will |
| 2343 | | be inserted to separate the text from the rest. If |
| 2344 | | necessary the insertion moves characters on the next |
| 2345 | | line to make place for the requested insertion string. |
| 2346 | | |
| 2347 | | Return Values : E_OK - success |
| 2348 | | E_REQUEST_DENIED - |
| 2349 | | E_SYSTEM_ERROR - system error |
| 2350 | +--------------------------------------------------------------------------*/ |
| 2351 | static int |
| 2352 | Insert_String(FORM *form, int row, FIELD_CELL *txt, int len) |
| 2353 | { |
| 2354 | FIELD *field = form->current; |
| 2355 | FIELD_CELL *bp = Address_Of_Row_In_Buffer(field, row); |
| 2356 | int datalen = (int)(After_End_Of_Data(bp, field->dcols) - bp); |
| 2357 | int freelen = field->dcols - datalen; |
| 2358 | int requiredlen = len + 1; |
| 2359 | FIELD_CELL *split; |
| 2360 | int result = E_REQUEST_DENIED; |
| 2361 | |
| 2362 | if (freelen >= requiredlen) |
| 2363 | { |
| 2364 | wmove(form->w, row, 0); |
| 2365 | myINSNSTR(form->w, txt, len); |
| 2366 | wmove(form->w, row, len); |
| 2367 | myINSNSTR(form->w, &myBLANK, 1); |
| 2368 | return E_OK; |
| 2369 | } |
| 2370 | else |
| 2371 | { |
| 2372 | /* we have to move characters on the next line. If we are on the |
| 2373 | last line this may work, if the field is growable */ |
| 2374 | if ((row == (field->drows - 1)) && Growable(field)) |
| 2375 | { |
| 2376 | if (!Field_Grown(field, 1)) |
| 2377 | return (E_SYSTEM_ERROR); |
| 2378 | /* !!!Side-Effect : might be changed due to growth!!! */ |
| 2379 | bp = Address_Of_Row_In_Buffer(field, row); |
| 2380 | } |
| 2381 | |
| 2382 | if (row < (field->drows - 1)) |
| 2383 | { |
| 2384 | split = |
| 2385 | After_Last_Whitespace_Character(bp, |
| 2386 | (int)(Get_Start_Of_Data(bp |
| 2387 | + field->dcols |
| 2388 | - requiredlen, |
| 2389 | requiredlen) |
| 2390 | - bp)); |
| 2391 | /* split points now to the first character of the portion of the |
| 2392 | line that must be moved to the next line */ |
| 2393 | datalen = (int)(split - bp); /* + freelen has to stay on this line */ |
| 2394 | freelen = field->dcols - (datalen + freelen); /* for the next line */ |
| 2395 | |
| 2396 | if ((result = Insert_String(form, row + 1, split, freelen)) == E_OK) |
| 2397 | { |
| 2398 | wmove(form->w, row, datalen); |
| 2399 | wclrtoeol(form->w); |
| 2400 | wmove(form->w, row, 0); |
| 2401 | myINSNSTR(form->w, txt, len); |
| 2402 | wmove(form->w, row, len); |
| 2403 | myINSNSTR(form->w, &myBLANK, 1); |
| 2404 | return E_OK; |
| 2405 | } |
| 2406 | } |
| 2407 | return (result); |
| 2408 | } |
| 2409 | } |
| 2410 | |
| 2411 | /*--------------------------------------------------------------------------- |
| 2412 | | Facility : libnform |
| 2413 | | Function : static int Wrapping_Not_Necessary_Or_Wrapping_Ok( |
| 2414 | | FORM * form) |
| 2415 | | |
| 2416 | | Description : If a character has been entered into a field, it may |
| 2417 | | be that wrapping has to occur. This routine checks |
| 2418 | | whether or not wrapping is required and if so, performs |
| 2419 | | the wrapping. |
| 2420 | | |
| 2421 | | Return Values : E_OK - no wrapping required or wrapping |
| 2422 | | was successful |
| 2423 | | E_REQUEST_DENIED - |
| 2424 | | E_SYSTEM_ERROR - some system error |
| 2425 | +--------------------------------------------------------------------------*/ |
| 2426 | static int |
| 2427 | Wrapping_Not_Necessary_Or_Wrapping_Ok(FORM *form) |
| 2428 | { |
| 2429 | FIELD *field = form->current; |
| 2430 | int result = E_REQUEST_DENIED; |
| 2431 | bool Last_Row = ((field->drows - 1) == form->currow); |
| 2432 | |
| 2433 | if ((field->opts & O_WRAP) && /* wrapping wanted */ |
| 2434 | (!Single_Line_Field(field)) && /* must be multi-line */ |
| 2435 | (There_Is_No_Room_For_A_Char_In_Line(form)) && /* line is full */ |
| 2436 | (!Last_Row || Growable(field))) /* there are more lines */ |
| 2437 | { |
| 2438 | FIELD_CELL *bp; |
| 2439 | FIELD_CELL *split; |
| 2440 | int chars_to_be_wrapped; |
| 2441 | int chars_to_remain_on_line; |
| 2442 | |
| 2443 | if (Last_Row) |
| 2444 | { |
| 2445 | /* the above logic already ensures, that in this case the field |
| 2446 | is growable */ |
| 2447 | if (!Field_Grown(field, 1)) |
| 2448 | return E_SYSTEM_ERROR; |
| 2449 | } |
| 2450 | bp = Address_Of_Current_Row_In_Buffer(form); |
| 2451 | Window_To_Buffer(form, field); |
| 2452 | split = After_Last_Whitespace_Character(bp, field->dcols); |
| 2453 | /* split points to the first character of the sequence to be brought |
| 2454 | on the next line */ |
| 2455 | chars_to_remain_on_line = (int)(split - bp); |
| 2456 | chars_to_be_wrapped = field->dcols - chars_to_remain_on_line; |
| 2457 | if (chars_to_remain_on_line > 0) |
| 2458 | { |
| 2459 | if ((result = Insert_String(form, form->currow + 1, split, |
| 2460 | chars_to_be_wrapped)) == E_OK) |
| 2461 | { |
| 2462 | wmove(form->w, form->currow, chars_to_remain_on_line); |
| 2463 | wclrtoeol(form->w); |
| 2464 | if (form->curcol >= chars_to_remain_on_line) |
| 2465 | { |
| 2466 | form->currow++; |
| 2467 | form->curcol -= chars_to_remain_on_line; |
| 2468 | } |
| 2469 | return E_OK; |
| 2470 | } |
| 2471 | } |
| 2472 | else |
| 2473 | return E_OK; |
| 2474 | if (result != E_OK) |
| 2475 | { |
| 2476 | DeleteChar(form); |
| 2477 | Window_To_Buffer(form, field); |
| 2478 | result = E_REQUEST_DENIED; |
| 2479 | } |
| 2480 | } |
| 2481 | else |
| 2482 | result = E_OK; /* wrapping was not necessary */ |
| 2483 | return (result); |
| 2484 | } |
| 2485 | |
| 2486 | /*---------------------------------------------------------------------------- |
| 2487 | Field Editing routines |
| 2488 | --------------------------------------------------------------------------*/ |
| 2489 | |
| 2490 | /*--------------------------------------------------------------------------- |
| 2491 | | Facility : libnform |
| 2492 | | Function : static int Field_Editing( |
| 2493 | | int (* const fct) (FORM *), |
| 2494 | | FORM * form) |
| 2495 | | |
| 2496 | | Description : Generic routine for field editing requests. The driver |
| 2497 | | routines are only called for editable fields, the |
| 2498 | | _WINDOW_MODIFIED flag is set if editing occurred. |
| 2499 | | This is somewhat special due to the overload semantics |
| 2500 | | of the NEW_LINE and DEL_PREV requests. |
| 2501 | | |
| 2502 | | Return Values : Error code from low level drivers. |
| 2503 | +--------------------------------------------------------------------------*/ |
| 2504 | static int |
| 2505 | Field_Editing(int (*const fct) (FORM *), FORM *form) |
| 2506 | { |
| 2507 | int res = E_REQUEST_DENIED; |
| 2508 | |
| 2509 | /* We have to deal here with the specific case of the overloaded |
| 2510 | behavior of New_Line and Delete_Previous requests. |
| 2511 | They may end up in navigational requests if we are on the first |
| 2512 | character in a field. But navigation is also allowed on non- |
| 2513 | editable fields. |
| 2514 | */ |
| 2515 | if ((fct == FE_Delete_Previous) && |
| 2516 | (form->opts & O_BS_OVERLOAD) && |
| 2517 | First_Position_In_Current_Field(form)) |
| 2518 | { |
| 2519 | res = Inter_Field_Navigation(FN_Previous_Field, form); |
| 2520 | } |
| 2521 | else |
| 2522 | { |
| 2523 | if (fct == FE_New_Line) |
| 2524 | { |
| 2525 | if ((form->opts & O_NL_OVERLOAD) && |
| 2526 | First_Position_In_Current_Field(form)) |
| 2527 | { |
| 2528 | res = Inter_Field_Navigation(FN_Next_Field, form); |
| 2529 | } |
| 2530 | else |
| 2531 | /* FE_New_Line deals itself with the _WINDOW_MODIFIED flag */ |
| 2532 | res = fct(form); |
| 2533 | } |
| 2534 | else |
| 2535 | { |
| 2536 | /* From now on, everything must be editable */ |
| 2537 | if (form->current->opts & O_EDIT) |
| 2538 | { |
| 2539 | res = fct(form); |
| 2540 | if (res == E_OK) |
| 2541 | form->status |= _WINDOW_MODIFIED; |
| 2542 | } |
| 2543 | } |
| 2544 | } |
| 2545 | return res; |
| 2546 | } |
| 2547 | |
| 2548 | /*--------------------------------------------------------------------------- |
| 2549 | | Facility : libnform |
| 2550 | | Function : static int FE_New_Line(FORM * form) |
| 2551 | | |
| 2552 | | Description : Perform a new line request. This is rather complex |
| 2553 | | compared to other routines in this code due to the |
| 2554 | | rather difficult to understand description in the |
| 2555 | | manuals. |
| 2556 | | |
| 2557 | | Return Values : E_OK - success |
| 2558 | | E_REQUEST_DENIED - new line not allowed |
| 2559 | | E_SYSTEM_ERROR - system error |
| 2560 | +--------------------------------------------------------------------------*/ |
| 2561 | static int |
| 2562 | FE_New_Line(FORM *form) |
| 2563 | { |
| 2564 | FIELD *field = form->current; |
| 2565 | FIELD_CELL *bp, *t; |
| 2566 | bool Last_Row = ((field->drows - 1) == form->currow); |
| 2567 | |
| 2568 | T((T_CALLED("FE_New_Line(%p)"), (void *)form)); |
| 2569 | if (form->status & _OVLMODE) |
| 2570 | { |
| 2571 | if (Last_Row && |
| 2572 | (!(Growable(field) && !Single_Line_Field(field)))) |
| 2573 | { |
| 2574 | if (!(form->opts & O_NL_OVERLOAD)) |
| 2575 | returnCode(E_REQUEST_DENIED); |
| 2576 | wmove(form->w, form->currow, form->curcol); |
| 2577 | wclrtoeol(form->w); |
| 2578 | /* we have to set this here, although it is also |
| 2579 | handled in the generic routine. The reason is, |
| 2580 | that FN_Next_Field may fail, but the form is |
| 2581 | definitively changed */ |
| 2582 | form->status |= _WINDOW_MODIFIED; |
| 2583 | returnCode(Inter_Field_Navigation(FN_Next_Field, form)); |
| 2584 | } |
| 2585 | else |
| 2586 | { |
| 2587 | if (Last_Row && !Field_Grown(field, 1)) |
| 2588 | { |
| 2589 | /* N.B.: due to the logic in the 'if', LastRow==TRUE |
| 2590 | means here that the field is growable and not |
| 2591 | a single-line field */ |
| 2592 | returnCode(E_SYSTEM_ERROR); |
| 2593 | } |
| 2594 | wmove(form->w, form->currow, form->curcol); |
| 2595 | wclrtoeol(form->w); |
| 2596 | form->currow++; |
| 2597 | form->curcol = 0; |
| 2598 | form->status |= _WINDOW_MODIFIED; |
| 2599 | returnCode(E_OK); |
| 2600 | } |
| 2601 | } |
| 2602 | else |
| 2603 | { |
| 2604 | /* Insert Mode */ |
| 2605 | if (Last_Row && |
| 2606 | !(Growable(field) && !Single_Line_Field(field))) |
| 2607 | { |
| 2608 | if (!(form->opts & O_NL_OVERLOAD)) |
| 2609 | returnCode(E_REQUEST_DENIED); |
| 2610 | returnCode(Inter_Field_Navigation(FN_Next_Field, form)); |
| 2611 | } |
| 2612 | else |
| 2613 | { |
| 2614 | bool May_Do_It = !Last_Row && Is_There_Room_For_A_Line(form); |
| 2615 | |
| 2616 | if (!(May_Do_It || Growable(field))) |
| 2617 | returnCode(E_REQUEST_DENIED); |
| 2618 | if (!May_Do_It && !Field_Grown(field, 1)) |
| 2619 | returnCode(E_SYSTEM_ERROR); |
| 2620 | |
| 2621 | bp = Address_Of_Current_Position_In_Buffer(form); |
| 2622 | t = After_End_Of_Data(bp, field->dcols - form->curcol); |
| 2623 | wmove(form->w, form->currow, form->curcol); |
| 2624 | wclrtoeol(form->w); |
| 2625 | form->currow++; |
| 2626 | form->curcol = 0; |
| 2627 | wmove(form->w, form->currow, form->curcol); |
| 2628 | winsertln(form->w); |
| 2629 | myADDNSTR(form->w, bp, (int)(t - bp)); |
| 2630 | form->status |= _WINDOW_MODIFIED; |
| 2631 | returnCode(E_OK); |
| 2632 | } |
| 2633 | } |
| 2634 | } |
| 2635 | |
| 2636 | /*--------------------------------------------------------------------------- |
| 2637 | | Facility : libnform |
| 2638 | | Function : static int FE_Insert_Character(FORM * form) |
| 2639 | | |
| 2640 | | Description : Insert blank character at the cursor position |
| 2641 | | |
| 2642 | | Return Values : E_OK |
| 2643 | | E_REQUEST_DENIED |
| 2644 | +--------------------------------------------------------------------------*/ |
| 2645 | static int |
| 2646 | FE_Insert_Character(FORM *form) |
| 2647 | { |
| 2648 | FIELD *field = form->current; |
| 2649 | int result = E_REQUEST_DENIED; |
| 2650 | |
| 2651 | T((T_CALLED("FE_Insert_Character(%p)"), (void *)form)); |
| 2652 | if (Check_Char(form, field, field->type, (int)C_BLANK, |
| 2653 | (TypeArgument *)(field->arg))) |
| 2654 | { |
| 2655 | bool There_Is_Room = Is_There_Room_For_A_Char_In_Line(form); |
| 2656 | |
| 2657 | if (There_Is_Room || |
| 2658 | ((Single_Line_Field(field) && Growable(field)))) |
| 2659 | { |
| 2660 | if (!There_Is_Room && !Field_Grown(field, 1)) |
| 2661 | result = E_SYSTEM_ERROR; |
| 2662 | else |
| 2663 | { |
| 2664 | winsch(form->w, (chtype)C_BLANK); |
| 2665 | result = Wrapping_Not_Necessary_Or_Wrapping_Ok(form); |
| 2666 | } |
| 2667 | } |
| 2668 | } |
| 2669 | returnCode(result); |
| 2670 | } |
| 2671 | |
| 2672 | /*--------------------------------------------------------------------------- |
| 2673 | | Facility : libnform |
| 2674 | | Function : static int FE_Insert_Line(FORM * form) |
| 2675 | | |
| 2676 | | Description : Insert a blank line at the cursor position |
| 2677 | | |
| 2678 | | Return Values : E_OK - success |
| 2679 | | E_REQUEST_DENIED - line can not be inserted |
| 2680 | +--------------------------------------------------------------------------*/ |
| 2681 | static int |
| 2682 | FE_Insert_Line(FORM *form) |
| 2683 | { |
| 2684 | FIELD *field = form->current; |
| 2685 | int result = E_REQUEST_DENIED; |
| 2686 | |
| 2687 | T((T_CALLED("FE_Insert_Line(%p)"), (void *)form)); |
| 2688 | if (Check_Char(form, field, |
| 2689 | field->type, (int)C_BLANK, (TypeArgument *)(field->arg))) |
| 2690 | { |
| 2691 | bool Maybe_Done = (form->currow != (field->drows - 1)) && |
| 2692 | Is_There_Room_For_A_Line(form); |
| 2693 | |
| 2694 | if (!Single_Line_Field(field) && |
| 2695 | (Maybe_Done || Growable(field))) |
| 2696 | { |
| 2697 | if (!Maybe_Done && !Field_Grown(field, 1)) |
| 2698 | result = E_SYSTEM_ERROR; |
| 2699 | else |
| 2700 | { |
| 2701 | form->curcol = 0; |
| 2702 | winsertln(form->w); |
| 2703 | result = E_OK; |
| 2704 | } |
| 2705 | } |
| 2706 | } |
| 2707 | returnCode(result); |
| 2708 | } |
| 2709 | |
| 2710 | /*--------------------------------------------------------------------------- |
| 2711 | | Facility : libnform |
| 2712 | | Function : static int FE_Delete_Character(FORM * form) |
| 2713 | | |
| 2714 | | Description : Delete character at the cursor position |
| 2715 | | |
| 2716 | | Return Values : E_OK - success |
| 2717 | +--------------------------------------------------------------------------*/ |
| 2718 | static int |
| 2719 | FE_Delete_Character(FORM *form) |
| 2720 | { |
| 2721 | T((T_CALLED("FE_Delete_Character(%p)"), (void *)form)); |
| 2722 | DeleteChar(form); |
| 2723 | returnCode(E_OK); |
| 2724 | } |
| 2725 | |
| 2726 | /*--------------------------------------------------------------------------- |
| 2727 | | Facility : libnform |
| 2728 | | Function : static int FE_Delete_Previous(FORM * form) |
| 2729 | | |
| 2730 | | Description : Delete character before cursor. Again this is a rather |
| 2731 | | difficult piece compared to others due to the overloading |
| 2732 | | semantics of backspace. |
| 2733 | | N.B.: The case of overloaded BS on first field position |
| 2734 | | is already handled in the generic routine. |
| 2735 | | |
| 2736 | | Return Values : E_OK - success |
| 2737 | | E_REQUEST_DENIED - Character can't be deleted |
| 2738 | +--------------------------------------------------------------------------*/ |
| 2739 | static int |
| 2740 | FE_Delete_Previous(FORM *form) |
| 2741 | { |
| 2742 | FIELD *field = form->current; |
| 2743 | |
| 2744 | T((T_CALLED("FE_Delete_Previous(%p)"), (void *)form)); |
| 2745 | if (First_Position_In_Current_Field(form)) |
| 2746 | returnCode(E_REQUEST_DENIED); |
| 2747 | |
| 2748 | if ((--(form->curcol)) < 0) |
| 2749 | { |
| 2750 | FIELD_CELL *this_line, *prev_line, *prev_end, *this_end; |
| 2751 | int this_row = form->currow; |
| 2752 | |
| 2753 | form->curcol++; |
| 2754 | if (form->status & _OVLMODE) |
| 2755 | returnCode(E_REQUEST_DENIED); |
| 2756 | |
| 2757 | prev_line = Address_Of_Row_In_Buffer(field, (form->currow - 1)); |
| 2758 | this_line = Address_Of_Row_In_Buffer(field, (form->currow)); |
| 2759 | Synchronize_Buffer(form); |
| 2760 | prev_end = After_End_Of_Data(prev_line, field->dcols); |
| 2761 | this_end = After_End_Of_Data(this_line, field->dcols); |
| 2762 | if ((int)(this_end - this_line) > |
| 2763 | (field->cols - (int)(prev_end - prev_line))) |
| 2764 | returnCode(E_REQUEST_DENIED); |
| 2765 | wmove(form->w, form->currow, form->curcol); |
| 2766 | wdeleteln(form->w); |
| 2767 | Adjust_Cursor_Position(form, prev_end); |
| 2768 | /* |
| 2769 | * If we did not really move to the previous line, help the user a |
| 2770 | * little. It is however a little inconsistent. Normally, when |
| 2771 | * backspacing around the point where text wraps to a new line in a |
| 2772 | * multi-line form, we absorb one keystroke for the wrapping point. That |
| 2773 | * is consistent with SVr4 forms. However, SVr4 does not allow typing |
| 2774 | * into the last column of the field, and requires the user to enter a |
| 2775 | * newline to move to the next line. Therefore it can consistently eat |
| 2776 | * that keystroke. Since ncurses allows the last column, it wraps |
| 2777 | * automatically (given the proper options). But we cannot eat the |
| 2778 | * keystroke to back over the wrapping point, since that would put the |
| 2779 | * cursor past the end of the form field. In this case, just delete the |
| 2780 | * character at the end of the field. |
| 2781 | */ |
| 2782 | if (form->currow == this_row && this_row > 0) |
| 2783 | { |
| 2784 | form->currow -= 1; |
| 2785 | form->curcol = field->dcols - 1; |
| 2786 | DeleteChar(form); |
| 2787 | } |
| 2788 | else |
| 2789 | { |
| 2790 | wmove(form->w, form->currow, form->curcol); |
| 2791 | myADDNSTR(form->w, this_line, (int)(this_end - this_line)); |
| 2792 | } |
| 2793 | } |
| 2794 | else |
| 2795 | { |
| 2796 | DeleteChar(form); |
| 2797 | } |
| 2798 | returnCode(E_OK); |
| 2799 | } |
| 2800 | |
| 2801 | /*--------------------------------------------------------------------------- |
| 2802 | | Facility : libnform |
| 2803 | | Function : static int FE_Delete_Line(FORM * form) |
| 2804 | | |
| 2805 | | Description : Delete line at cursor position. |
| 2806 | | |
| 2807 | | Return Values : E_OK - success |
| 2808 | +--------------------------------------------------------------------------*/ |
| 2809 | static int |
| 2810 | FE_Delete_Line(FORM *form) |
| 2811 | { |
| 2812 | T((T_CALLED("FE_Delete_Line(%p)"), (void *)form)); |
| 2813 | form->curcol = 0; |
| 2814 | wdeleteln(form->w); |
| 2815 | returnCode(E_OK); |
| 2816 | } |
| 2817 | |
| 2818 | /*--------------------------------------------------------------------------- |
| 2819 | | Facility : libnform |
| 2820 | | Function : static int FE_Delete_Word(FORM * form) |
| 2821 | | |
| 2822 | | Description : Delete word at cursor position |
| 2823 | | |
| 2824 | | Return Values : E_OK - success |
| 2825 | | E_REQUEST_DENIED - failure |
| 2826 | +--------------------------------------------------------------------------*/ |
| 2827 | static int |
| 2828 | FE_Delete_Word(FORM *form) |
| 2829 | { |
| 2830 | FIELD *field = form->current; |
| 2831 | FIELD_CELL *bp = Address_Of_Current_Row_In_Buffer(form); |
| 2832 | FIELD_CELL *ep = bp + field->dcols; |
| 2833 | FIELD_CELL *cp = bp + form->curcol; |
| 2834 | FIELD_CELL *s; |
| 2835 | |
| 2836 | T((T_CALLED("FE_Delete_Word(%p)"), (void *)form)); |
| 2837 | Synchronize_Buffer(form); |
| 2838 | if (ISBLANK(*cp)) |
| 2839 | returnCode(E_REQUEST_DENIED); /* not in word */ |
| 2840 | |
| 2841 | /* move cursor to begin of word and erase to end of screen-line */ |
| 2842 | Adjust_Cursor_Position(form, |
| 2843 | After_Last_Whitespace_Character(bp, form->curcol)); |
| 2844 | wmove(form->w, form->currow, form->curcol); |
| 2845 | wclrtoeol(form->w); |
| 2846 | |
| 2847 | /* skip over word in buffer */ |
| 2848 | s = Get_First_Whitespace_Character(cp, (int)(ep - cp)); |
| 2849 | /* to begin of next word */ |
| 2850 | s = Get_Start_Of_Data(s, (int)(ep - s)); |
| 2851 | if ((s != cp) && !ISBLANK(*s)) |
| 2852 | { |
| 2853 | /* copy remaining line to window */ |
| 2854 | myADDNSTR(form->w, s, (int)(s - After_End_Of_Data(s, (int)(ep - s)))); |
| 2855 | } |
| 2856 | returnCode(E_OK); |
| 2857 | } |
| 2858 | |
| 2859 | /*--------------------------------------------------------------------------- |
| 2860 | | Facility : libnform |
| 2861 | | Function : static int FE_Clear_To_End_Of_Line(FORM * form) |
| 2862 | | |
| 2863 | | Description : Clear to end of current line. |
| 2864 | | |
| 2865 | | Return Values : E_OK - success |
| 2866 | +--------------------------------------------------------------------------*/ |
| 2867 | static int |
| 2868 | FE_Clear_To_End_Of_Line(FORM *form) |
| 2869 | { |
| 2870 | T((T_CALLED("FE_Clear_To_End_Of_Line(%p)"), (void *)form)); |
| 2871 | wmove(form->w, form->currow, form->curcol); |
| 2872 | wclrtoeol(form->w); |
| 2873 | returnCode(E_OK); |
| 2874 | } |
| 2875 | |
| 2876 | /*--------------------------------------------------------------------------- |
| 2877 | | Facility : libnform |
| 2878 | | Function : static int FE_Clear_To_End_Of_Field(FORM * form) |
| 2879 | | |
| 2880 | | Description : Clear to end of field. |
| 2881 | | |
| 2882 | | Return Values : E_OK - success |
| 2883 | +--------------------------------------------------------------------------*/ |
| 2884 | static int |
| 2885 | FE_Clear_To_End_Of_Field(FORM *form) |
| 2886 | { |
| 2887 | T((T_CALLED("FE_Clear_To_End_Of_Field(%p)"), (void *)form)); |
| 2888 | wmove(form->w, form->currow, form->curcol); |
| 2889 | wclrtobot(form->w); |
| 2890 | returnCode(E_OK); |
| 2891 | } |
| 2892 | |
| 2893 | /*--------------------------------------------------------------------------- |
| 2894 | | Facility : libnform |
| 2895 | | Function : static int FE_Clear_Field(FORM * form) |
| 2896 | | |
| 2897 | | Description : Clear entire field. |
| 2898 | | |
| 2899 | | Return Values : E_OK - success |
| 2900 | +--------------------------------------------------------------------------*/ |
| 2901 | static int |
| 2902 | FE_Clear_Field(FORM *form) |
| 2903 | { |
| 2904 | T((T_CALLED("FE_Clear_Field(%p)"), (void *)form)); |
| 2905 | form->currow = form->curcol = 0; |
| 2906 | werase(form->w); |
| 2907 | returnCode(E_OK); |
| 2908 | } |
| 2909 | /*---------------------------------------------------------------------------- |
| 2910 | END of Field Editing routines |
| 2911 | --------------------------------------------------------------------------*/ |
| 2912 | |
| 2913 | /*---------------------------------------------------------------------------- |
| 2914 | Edit Mode routines |
| 2915 | --------------------------------------------------------------------------*/ |
| 2916 | |
| 2917 | /*--------------------------------------------------------------------------- |
| 2918 | | Facility : libnform |
| 2919 | | Function : static int EM_Overlay_Mode(FORM * form) |
| 2920 | | |
| 2921 | | Description : Switch to overlay mode. |
| 2922 | | |
| 2923 | | Return Values : E_OK - success |
| 2924 | +--------------------------------------------------------------------------*/ |
| 2925 | static int |
| 2926 | EM_Overlay_Mode(FORM *form) |
| 2927 | { |
| 2928 | T((T_CALLED("EM_Overlay_Mode(%p)"), (void *)form)); |
| 2929 | form->status |= _OVLMODE; |
| 2930 | returnCode(E_OK); |
| 2931 | } |
| 2932 | |
| 2933 | /*--------------------------------------------------------------------------- |
| 2934 | | Facility : libnform |
| 2935 | | Function : static int EM_Insert_Mode(FORM * form) |
| 2936 | | |
| 2937 | | Description : Switch to insert mode |
| 2938 | | |
| 2939 | | Return Values : E_OK - success |
| 2940 | +--------------------------------------------------------------------------*/ |
| 2941 | static int |
| 2942 | EM_Insert_Mode(FORM *form) |
| 2943 | { |
| 2944 | T((T_CALLED("EM_Insert_Mode(%p)"), (void *)form)); |
| 2945 | form->status &= ~_OVLMODE; |
| 2946 | returnCode(E_OK); |
| 2947 | } |
| 2948 | |
| 2949 | /*---------------------------------------------------------------------------- |
| 2950 | END of Edit Mode routines |
| 2951 | --------------------------------------------------------------------------*/ |
| 2952 | |
| 2953 | /*---------------------------------------------------------------------------- |
| 2954 | Helper routines for Choice Requests |
| 2955 | --------------------------------------------------------------------------*/ |
| 2956 | |
| 2957 | /*--------------------------------------------------------------------------- |
| 2958 | | Facility : libnform |
| 2959 | | Function : static bool Next_Choice(FORM * form, |
| 2960 | | FIELDTYPE * typ, |
| 2961 | | FIELD * field, |
| 2962 | | TypeArgument *argp) |
| 2963 | | |
| 2964 | | Description : Get the next field choice. For linked types this is |
| 2965 | | done recursively. |
| 2966 | | |
| 2967 | | Return Values : TRUE - next choice successfully retrieved |
| 2968 | | FALSE - couldn't retrieve next choice |
| 2969 | +--------------------------------------------------------------------------*/ |
| 2970 | static bool |
| 2971 | Next_Choice(FORM *form, FIELDTYPE *typ, FIELD *field, TypeArgument *argp) |
| 2972 | { |
| 2973 | if (!typ || !(typ->status & _HAS_CHOICE)) |
| 2974 | return FALSE; |
| 2975 | |
| 2976 | if (typ->status & _LINKED_TYPE) |
| 2977 | { |
| 2978 | assert(argp); |
| 2979 | return ( |
| 2980 | Next_Choice(form, typ->left, field, argp->left) || |
| 2981 | Next_Choice(form, typ->right, field, argp->right)); |
| 2982 | } |
| 2983 | else |
| 2984 | { |
| 2985 | #if NCURSES_INTEROP_FUNCS |
| 2986 | assert(typ->enum_next.onext); |
| 2987 | if (typ->status & _GENERIC) |
| 2988 | return typ->enum_next.gnext(form, field, (void *)argp); |
| 2989 | else |
| 2990 | return typ->enum_next.onext(field, (void *)argp); |
| 2991 | #else |
| 2992 | assert(typ->next); |
| 2993 | return typ->next(field, (void *)argp); |
| 2994 | #endif |
| 2995 | } |
| 2996 | } |
| 2997 | |
| 2998 | /*--------------------------------------------------------------------------- |
| 2999 | | Facility : libnform |
| 3000 | | Function : static bool Previous_Choice(FORM * form, |
| 3001 | | FIELDTYPE * typ, |
| 3002 | | FIELD * field, |
| 3003 | | TypeArgument *argp) |
| 3004 | | |
| 3005 | | Description : Get the previous field choice. For linked types this |
| 3006 | | is done recursively. |
| 3007 | | |
| 3008 | | Return Values : TRUE - previous choice successfully retrieved |
| 3009 | | FALSE - couldn't retrieve previous choice |
| 3010 | +--------------------------------------------------------------------------*/ |
| 3011 | static bool |
| 3012 | Previous_Choice(FORM *form, FIELDTYPE *typ, FIELD *field, TypeArgument *argp) |
| 3013 | { |
| 3014 | if (!typ || !(typ->status & _HAS_CHOICE)) |
| 3015 | return FALSE; |
| 3016 | |
| 3017 | if (typ->status & _LINKED_TYPE) |
| 3018 | { |
| 3019 | assert(argp); |
| 3020 | return ( |
| 3021 | Previous_Choice(form, typ->left, field, argp->left) || |
| 3022 | Previous_Choice(form, typ->right, field, argp->right)); |
| 3023 | } |
| 3024 | else |
| 3025 | { |
| 3026 | #if NCURSES_INTEROP_FUNCS |
| 3027 | assert(typ->enum_prev.oprev); |
| 3028 | if (typ->status & _GENERIC) |
| 3029 | return typ->enum_prev.gprev(form, field, (void *)argp); |
| 3030 | else |
| 3031 | return typ->enum_prev.oprev(field, (void *)argp); |
| 3032 | #else |
| 3033 | assert(typ->prev); |
| 3034 | return typ->prev(field, (void *)argp); |
| 3035 | #endif |
| 3036 | } |
| 3037 | } |
| 3038 | /*---------------------------------------------------------------------------- |
| 3039 | End of Helper routines for Choice Requests |
| 3040 | --------------------------------------------------------------------------*/ |
| 3041 | |
| 3042 | /*---------------------------------------------------------------------------- |
| 3043 | Routines for Choice Requests |
| 3044 | --------------------------------------------------------------------------*/ |
| 3045 | |
| 3046 | /*--------------------------------------------------------------------------- |
| 3047 | | Facility : libnform |
| 3048 | | Function : static int CR_Next_Choice(FORM * form) |
| 3049 | | |
| 3050 | | Description : Get the next field choice. |
| 3051 | | |
| 3052 | | Return Values : E_OK - success |
| 3053 | | E_REQUEST_DENIED - next choice couldn't be retrieved |
| 3054 | +--------------------------------------------------------------------------*/ |
| 3055 | static int |
| 3056 | CR_Next_Choice(FORM *form) |
| 3057 | { |
| 3058 | FIELD *field = form->current; |
| 3059 | |
| 3060 | T((T_CALLED("CR_Next_Choice(%p)"), (void *)form)); |
| 3061 | Synchronize_Buffer(form); |
| 3062 | returnCode((Next_Choice(form, field->type, field, (TypeArgument *)(field->arg))) |
| 3063 | ? E_OK |
| 3064 | : E_REQUEST_DENIED); |
| 3065 | } |
| 3066 | |
| 3067 | /*--------------------------------------------------------------------------- |
| 3068 | | Facility : libnform |
| 3069 | | Function : static int CR_Previous_Choice(FORM * form) |
| 3070 | | |
| 3071 | | Description : Get the previous field choice. |
| 3072 | | |
| 3073 | | Return Values : E_OK - success |
| 3074 | | E_REQUEST_DENIED - prev. choice couldn't be retrieved |
| 3075 | +--------------------------------------------------------------------------*/ |
| 3076 | static int |
| 3077 | CR_Previous_Choice(FORM *form) |
| 3078 | { |
| 3079 | FIELD *field = form->current; |
| 3080 | |
| 3081 | T((T_CALLED("CR_Previous_Choice(%p)"), (void *)form)); |
| 3082 | Synchronize_Buffer(form); |
| 3083 | returnCode((Previous_Choice(form, field->type, field, (TypeArgument *)(field->arg))) |
| 3084 | ? E_OK |
| 3085 | : E_REQUEST_DENIED); |
| 3086 | } |
| 3087 | /*---------------------------------------------------------------------------- |
| 3088 | End of Routines for Choice Requests |
| 3089 | --------------------------------------------------------------------------*/ |
| 3090 | |
| 3091 | /*---------------------------------------------------------------------------- |
| 3092 | Helper routines for Field Validations. |
| 3093 | --------------------------------------------------------------------------*/ |
| 3094 | |
| 3095 | /*--------------------------------------------------------------------------- |
| 3096 | | Facility : libnform |
| 3097 | | Function : static bool Check_Field(FORM* form, |
| 3098 | | FIELDTYPE * typ, |
| 3099 | | FIELD * field, |
| 3100 | | TypeArgument * argp) |
| 3101 | | |
| 3102 | | Description : Check the field according to its fieldtype and its |
| 3103 | | actual arguments. For linked fieldtypes this is done |
| 3104 | | recursively. |
| 3105 | | |
| 3106 | | Return Values : TRUE - field is valid |
| 3107 | | FALSE - field is invalid. |
| 3108 | +--------------------------------------------------------------------------*/ |
| 3109 | static bool |
| 3110 | Check_Field(FORM *form, FIELDTYPE *typ, FIELD *field, TypeArgument *argp) |
| 3111 | { |
| 3112 | if (typ) |
| 3113 | { |
| 3114 | if (field->opts & O_NULLOK) |
| 3115 | { |
| 3116 | FIELD_CELL *bp = field->buf; |
| 3117 | |
| 3118 | assert(bp); |
| 3119 | while (ISBLANK(*bp)) |
| 3120 | { |
| 3121 | bp++; |
| 3122 | } |
| 3123 | if (CharOf(*bp) == 0) |
| 3124 | return TRUE; |
| 3125 | } |
| 3126 | |
| 3127 | if (typ->status & _LINKED_TYPE) |
| 3128 | { |
| 3129 | assert(argp); |
| 3130 | return ( |
| 3131 | Check_Field(form, typ->left, field, argp->left) || |
| 3132 | Check_Field(form, typ->right, field, argp->right)); |
| 3133 | } |
| 3134 | else |
| 3135 | { |
| 3136 | #if NCURSES_INTEROP_FUNCS |
| 3137 | if (typ->fieldcheck.ofcheck) |
| 3138 | { |
| 3139 | if (typ->status & _GENERIC) |
| 3140 | return typ->fieldcheck.gfcheck(form, field, (void *)argp); |
| 3141 | else |
| 3142 | return typ->fieldcheck.ofcheck(field, (void *)argp); |
| 3143 | } |
| 3144 | #else |
| 3145 | if (typ->fcheck) |
| 3146 | return typ->fcheck(field, (void *)argp); |
| 3147 | #endif |
| 3148 | } |
| 3149 | } |
| 3150 | return TRUE; |
| 3151 | } |
| 3152 | |
| 3153 | /*--------------------------------------------------------------------------- |
| 3154 | | Facility : libnform |
| 3155 | | Function : bool _nc_Internal_Validation(FORM * form ) |
| 3156 | | |
| 3157 | | Description : Validate the current field of the form. |
| 3158 | | |
| 3159 | | Return Values : TRUE - field is valid |
| 3160 | | FALSE - field is invalid |
| 3161 | +--------------------------------------------------------------------------*/ |
| 3162 | NCURSES_EXPORT(bool) |
| 3163 | _nc_Internal_Validation(FORM *form) |
| 3164 | { |
| 3165 | FIELD *field; |
| 3166 | |
| 3167 | field = form->current; |
| 3168 | |
| 3169 | Synchronize_Buffer(form); |
| 3170 | if ((form->status & _FCHECK_REQUIRED) || |
| 3171 | (!(field->opts & O_PASSOK))) |
| 3172 | { |
| 3173 | if (!Check_Field(form, field->type, field, (TypeArgument *)(field->arg))) |
| 3174 | return FALSE; |
| 3175 | form->status &= ~_FCHECK_REQUIRED; |
| 3176 | field->status |= _CHANGED; |
| 3177 | Synchronize_Linked_Fields(field); |
| 3178 | } |
| 3179 | return TRUE; |
| 3180 | } |
| 3181 | /*---------------------------------------------------------------------------- |
| 3182 | End of Helper routines for Field Validations. |
| 3183 | --------------------------------------------------------------------------*/ |
| 3184 | |
| 3185 | /*---------------------------------------------------------------------------- |
| 3186 | Routines for Field Validation. |
| 3187 | --------------------------------------------------------------------------*/ |
| 3188 | |
| 3189 | /*--------------------------------------------------------------------------- |
| 3190 | | Facility : libnform |
| 3191 | | Function : static int FV_Validation(FORM * form) |
| 3192 | | |
| 3193 | | Description : Validate the current field of the form. |
| 3194 | | |
| 3195 | | Return Values : E_OK - field valid |
| 3196 | | E_INVALID_FIELD - field not valid |
| 3197 | +--------------------------------------------------------------------------*/ |
| 3198 | static int |
| 3199 | FV_Validation(FORM *form) |
| 3200 | { |
| 3201 | T((T_CALLED("FV_Validation(%p)"), (void *)form)); |
| 3202 | if (_nc_Internal_Validation(form)) |
| 3203 | returnCode(E_OK); |
| 3204 | else |
| 3205 | returnCode(E_INVALID_FIELD); |
| 3206 | } |
| 3207 | /*---------------------------------------------------------------------------- |
| 3208 | End of routines for Field Validation. |
| 3209 | --------------------------------------------------------------------------*/ |
| 3210 | |
| 3211 | /*---------------------------------------------------------------------------- |
| 3212 | Helper routines for Inter-Field Navigation |
| 3213 | --------------------------------------------------------------------------*/ |
| 3214 | |
| 3215 | /*--------------------------------------------------------------------------- |
| 3216 | | Facility : libnform |
| 3217 | | Function : static FIELD *Next_Field_On_Page(FIELD * field) |
| 3218 | | |
| 3219 | | Description : Get the next field after the given field on the current |
| 3220 | | page. The order of fields is the one defined by the |
| 3221 | | fields array. Only visible and active fields are |
| 3222 | | counted. |
| 3223 | | |
| 3224 | | Return Values : Pointer to the next field. |
| 3225 | +--------------------------------------------------------------------------*/ |
| 3226 | NCURSES_INLINE static FIELD * |
| 3227 | Next_Field_On_Page(FIELD *field) |
| 3228 | { |
| 3229 | FORM *form = field->form; |
| 3230 | FIELD **field_on_page = &form->field[field->index]; |
| 3231 | FIELD **first_on_page = &form->field[form->page[form->curpage].pmin]; |
| 3232 | FIELD **last_on_page = &form->field[form->page[form->curpage].pmax]; |
| 3233 | |
| 3234 | do |
| 3235 | { |
| 3236 | field_on_page = |
| 3237 | (field_on_page == last_on_page) ? first_on_page : field_on_page + 1; |
| 3238 | if (Field_Is_Selectable(*field_on_page)) |
| 3239 | break; |
| 3240 | } |
| 3241 | while (field != (*field_on_page)); |
| 3242 | return (*field_on_page); |
| 3243 | } |
| 3244 | |
| 3245 | /*--------------------------------------------------------------------------- |
| 3246 | | Facility : libnform |
| 3247 | | Function : FIELD* _nc_First_Active_Field(FORM * form) |
| 3248 | | |
| 3249 | | Description : Get the first active field on the current page, |
| 3250 | | if there are such. If there are none, get the first |
| 3251 | | visible field on the page. If there are also none, |
| 3252 | | we return the first field on page and hope the best. |
| 3253 | | |
| 3254 | | Return Values : Pointer to calculated field. |
| 3255 | +--------------------------------------------------------------------------*/ |
| 3256 | NCURSES_EXPORT(FIELD *) |
| 3257 | _nc_First_Active_Field(FORM *form) |
| 3258 | { |
| 3259 | FIELD **last_on_page = &form->field[form->page[form->curpage].pmax]; |
| 3260 | FIELD *proposed = Next_Field_On_Page(*last_on_page); |
| 3261 | |
| 3262 | if (proposed == *last_on_page) |
| 3263 | { |
| 3264 | /* there might be the special situation, where there is no |
| 3265 | active and visible field on the current page. We then select |
| 3266 | the first visible field on this readonly page |
| 3267 | */ |
| 3268 | if (Field_Is_Not_Selectable(proposed)) |
| 3269 | { |
| 3270 | FIELD **field = &form->field[proposed->index]; |
| 3271 | FIELD **first = &form->field[form->page[form->curpage].pmin]; |
| 3272 | |
| 3273 | do |
| 3274 | { |
| 3275 | field = (field == last_on_page) ? first : field + 1; |
| 3276 | if (((*field)->opts & O_VISIBLE)) |
| 3277 | break; |
| 3278 | } |
| 3279 | while (proposed != (*field)); |
| 3280 | |
| 3281 | proposed = *field; |
| 3282 | |
| 3283 | if ((proposed == *last_on_page) && !(proposed->opts & O_VISIBLE)) |
| 3284 | { |
| 3285 | /* This means, there is also no visible field on the page. |
| 3286 | So we propose the first one and hope the very best... |
| 3287 | Some very clever user has designed a readonly and invisible |
| 3288 | page on this form. |
| 3289 | */ |
| 3290 | proposed = *first; |
| 3291 | } |
| 3292 | } |
| 3293 | } |
| 3294 | return (proposed); |
| 3295 | } |
| 3296 | |
| 3297 | /*--------------------------------------------------------------------------- |
| 3298 | | Facility : libnform |
| 3299 | | Function : static FIELD *Previous_Field_On_Page(FIELD * field) |
| 3300 | | |
| 3301 | | Description : Get the previous field before the given field on the |
| 3302 | | current page. The order of fields is the one defined by |
| 3303 | | the fields array. Only visible and active fields are |
| 3304 | | counted. |
| 3305 | | |
| 3306 | | Return Values : Pointer to the previous field. |
| 3307 | +--------------------------------------------------------------------------*/ |
| 3308 | NCURSES_INLINE static FIELD * |
| 3309 | Previous_Field_On_Page(FIELD *field) |
| 3310 | { |
| 3311 | FORM *form = field->form; |
| 3312 | FIELD **field_on_page = &form->field[field->index]; |
| 3313 | FIELD **first_on_page = &form->field[form->page[form->curpage].pmin]; |
| 3314 | FIELD **last_on_page = &form->field[form->page[form->curpage].pmax]; |
| 3315 | |
| 3316 | do |
| 3317 | { |
| 3318 | field_on_page = |
| 3319 | (field_on_page == first_on_page) ? last_on_page : field_on_page - 1; |
| 3320 | if (Field_Is_Selectable(*field_on_page)) |
| 3321 | break; |
| 3322 | } |
| 3323 | while (field != (*field_on_page)); |
| 3324 | |
| 3325 | return (*field_on_page); |
| 3326 | } |
| 3327 | |
| 3328 | /*--------------------------------------------------------------------------- |
| 3329 | | Facility : libnform |
| 3330 | | Function : static FIELD *Sorted_Next_Field(FIELD * field) |
| 3331 | | |
| 3332 | | Description : Get the next field after the given field on the current |
| 3333 | | page. The order of fields is the one defined by the |
| 3334 | | (row,column) geometry, rows are major. |
| 3335 | | |
| 3336 | | Return Values : Pointer to the next field. |
| 3337 | +--------------------------------------------------------------------------*/ |
| 3338 | NCURSES_INLINE static FIELD * |
| 3339 | Sorted_Next_Field(FIELD *field) |
| 3340 | { |
| 3341 | FIELD *field_on_page = field; |
| 3342 | |
| 3343 | do |
| 3344 | { |
| 3345 | field_on_page = field_on_page->snext; |
| 3346 | if (Field_Is_Selectable(field_on_page)) |
| 3347 | break; |
| 3348 | } |
| 3349 | while (field_on_page != field); |
| 3350 | |
| 3351 | return (field_on_page); |
| 3352 | } |
| 3353 | |
| 3354 | /*--------------------------------------------------------------------------- |
| 3355 | | Facility : libnform |
| 3356 | | Function : static FIELD *Sorted_Previous_Field(FIELD * field) |
| 3357 | | |
| 3358 | | Description : Get the previous field before the given field on the |
| 3359 | | current page. The order of fields is the one defined |
| 3360 | | by the (row,column) geometry, rows are major. |
| 3361 | | |
| 3362 | | Return Values : Pointer to the previous field. |
| 3363 | +--------------------------------------------------------------------------*/ |
| 3364 | NCURSES_INLINE static FIELD * |
| 3365 | Sorted_Previous_Field(FIELD *field) |
| 3366 | { |
| 3367 | FIELD *field_on_page = field; |
| 3368 | |
| 3369 | do |
| 3370 | { |
| 3371 | field_on_page = field_on_page->sprev; |
| 3372 | if (Field_Is_Selectable(field_on_page)) |
| 3373 | break; |
| 3374 | } |
| 3375 | while (field_on_page != field); |
| 3376 | |
| 3377 | return (field_on_page); |
| 3378 | } |
| 3379 | |
| 3380 | /*--------------------------------------------------------------------------- |
| 3381 | | Facility : libnform |
| 3382 | | Function : static FIELD *Left_Neighbor_Field(FIELD * field) |
| 3383 | | |
| 3384 | | Description : Get the left neighbor of the field on the same line |
| 3385 | | and the same page. Cycles through the line. |
| 3386 | | |
| 3387 | | Return Values : Pointer to left neighbor field. |
| 3388 | +--------------------------------------------------------------------------*/ |
| 3389 | NCURSES_INLINE static FIELD * |
| 3390 | Left_Neighbor_Field(FIELD *field) |
| 3391 | { |
| 3392 | FIELD *field_on_page = field; |
| 3393 | |
| 3394 | /* For a field that has really a left neighbor, the while clause |
| 3395 | immediately fails and the loop is left, positioned at the right |
| 3396 | neighbor. Otherwise we cycle backwards through the sorted field list |
| 3397 | until we enter the same line (from the right end). |
| 3398 | */ |
| 3399 | do |
| 3400 | { |
| 3401 | field_on_page = Sorted_Previous_Field(field_on_page); |
| 3402 | } |
| 3403 | while (field_on_page->frow != field->frow); |
| 3404 | |
| 3405 | return (field_on_page); |
| 3406 | } |
| 3407 | |
| 3408 | /*--------------------------------------------------------------------------- |
| 3409 | | Facility : libnform |
| 3410 | | Function : static FIELD *Right_Neighbor_Field(FIELD * field) |
| 3411 | | |
| 3412 | | Description : Get the right neighbor of the field on the same line |
| 3413 | | and the same page. |
| 3414 | | |
| 3415 | | Return Values : Pointer to right neighbor field. |
| 3416 | +--------------------------------------------------------------------------*/ |
| 3417 | NCURSES_INLINE static FIELD * |
| 3418 | Right_Neighbor_Field(FIELD *field) |
| 3419 | { |
| 3420 | FIELD *field_on_page = field; |
| 3421 | |
| 3422 | /* See the comments on Left_Neighbor_Field to understand how it works */ |
| 3423 | do |
| 3424 | { |
| 3425 | field_on_page = Sorted_Next_Field(field_on_page); |
| 3426 | } |
| 3427 | while (field_on_page->frow != field->frow); |
| 3428 | |
| 3429 | return (field_on_page); |
| 3430 | } |
| 3431 | |
| 3432 | /*--------------------------------------------------------------------------- |
| 3433 | | Facility : libnform |
| 3434 | | Function : static FIELD *Upper_Neighbor_Field(FIELD * field) |
| 3435 | | |
| 3436 | | Description : Because of the row-major nature of sorting the fields, |
| 3437 | | it is more difficult to define whats the upper neighbor |
| 3438 | | field really means. We define that it must be on a |
| 3439 | | 'previous' line (cyclic order!) and is the rightmost |
| 3440 | | field laying on the left side of the given field. If |
| 3441 | | this set is empty, we take the first field on the line. |
| 3442 | | |
| 3443 | | Return Values : Pointer to the upper neighbor field. |
| 3444 | +--------------------------------------------------------------------------*/ |
| 3445 | static FIELD * |
| 3446 | Upper_Neighbor_Field(FIELD *field) |
| 3447 | { |
| 3448 | FIELD *field_on_page = field; |
| 3449 | int frow = field->frow; |
| 3450 | int fcol = field->fcol; |
| 3451 | |
| 3452 | /* Walk back to the 'previous' line. The second term in the while clause |
| 3453 | just guarantees that we stop if we cycled through the line because |
| 3454 | there might be no 'previous' line if the page has just one line. |
| 3455 | */ |
| 3456 | do |
| 3457 | { |
| 3458 | field_on_page = Sorted_Previous_Field(field_on_page); |
| 3459 | } |
| 3460 | while (field_on_page->frow == frow && field_on_page->fcol != fcol); |
| 3461 | |
| 3462 | if (field_on_page->frow != frow) |
| 3463 | { |
| 3464 | /* We really found a 'previous' line. We are positioned at the |
| 3465 | rightmost field on this line */ |
| 3466 | frow = field_on_page->frow; |
| 3467 | |
| 3468 | /* We walk to the left as long as we are really right of the |
| 3469 | field. */ |
| 3470 | while (field_on_page->frow == frow && field_on_page->fcol > fcol) |
| 3471 | field_on_page = Sorted_Previous_Field(field_on_page); |
| 3472 | |
| 3473 | /* If we wrapped, just go to the right which is the first field on |
| 3474 | the row */ |
| 3475 | if (field_on_page->frow != frow) |
| 3476 | field_on_page = Sorted_Next_Field(field_on_page); |
| 3477 | } |
| 3478 | |
| 3479 | return (field_on_page); |
| 3480 | } |
| 3481 | |
| 3482 | /*--------------------------------------------------------------------------- |
| 3483 | | Facility : libnform |
| 3484 | | Function : static FIELD *Down_Neighbor_Field(FIELD * field) |
| 3485 | | |
| 3486 | | Description : Because of the row-major nature of sorting the fields, |
| 3487 | | its more difficult to define whats the down neighbor |
| 3488 | | field really means. We define that it must be on a |
| 3489 | | 'next' line (cyclic order!) and is the leftmost |
| 3490 | | field laying on the right side of the given field. If |
| 3491 | | this set is empty, we take the last field on the line. |
| 3492 | | |
| 3493 | | Return Values : Pointer to the upper neighbor field. |
| 3494 | +--------------------------------------------------------------------------*/ |
| 3495 | static FIELD * |
| 3496 | Down_Neighbor_Field(FIELD *field) |
| 3497 | { |
| 3498 | FIELD *field_on_page = field; |
| 3499 | int frow = field->frow; |
| 3500 | int fcol = field->fcol; |
| 3501 | |
| 3502 | /* Walk forward to the 'next' line. The second term in the while clause |
| 3503 | just guarantees that we stop if we cycled through the line because |
| 3504 | there might be no 'next' line if the page has just one line. |
| 3505 | */ |
| 3506 | do |
| 3507 | { |
| 3508 | field_on_page = Sorted_Next_Field(field_on_page); |
| 3509 | } |
| 3510 | while (field_on_page->frow == frow && field_on_page->fcol != fcol); |
| 3511 | |
| 3512 | if (field_on_page->frow != frow) |
| 3513 | { |
| 3514 | /* We really found a 'next' line. We are positioned at the rightmost |
| 3515 | field on this line */ |
| 3516 | frow = field_on_page->frow; |
| 3517 | |
| 3518 | /* We walk to the right as long as we are really left of the |
| 3519 | field. */ |
| 3520 | while (field_on_page->frow == frow && field_on_page->fcol < fcol) |
| 3521 | field_on_page = Sorted_Next_Field(field_on_page); |
| 3522 | |
| 3523 | /* If we wrapped, just go to the left which is the last field on |
| 3524 | the row */ |
| 3525 | if (field_on_page->frow != frow) |
| 3526 | field_on_page = Sorted_Previous_Field(field_on_page); |
| 3527 | } |
| 3528 | |
| 3529 | return (field_on_page); |
| 3530 | } |
| 3531 | |
| 3532 | /*---------------------------------------------------------------------------- |
| 3533 | Inter-Field Navigation routines |
| 3534 | --------------------------------------------------------------------------*/ |
| 3535 | |
| 3536 | /*--------------------------------------------------------------------------- |
| 3537 | | Facility : libnform |
| 3538 | | Function : static int Inter_Field_Navigation( |
| 3539 | | int (* const fct) (FORM *), |
| 3540 | | FORM * form) |
| 3541 | | |
| 3542 | | Description : Generic behavior for changing the current field, the |
| 3543 | | field is left and a new field is entered. So the field |
| 3544 | | must be validated and the field init/term hooks must |
| 3545 | | be called. |
| 3546 | | |
| 3547 | | Return Values : E_OK - success |
| 3548 | | E_INVALID_FIELD - field is invalid |
| 3549 | | some other - error from subordinate call |
| 3550 | +--------------------------------------------------------------------------*/ |
| 3551 | static int |
| 3552 | Inter_Field_Navigation(int (*const fct) (FORM *), FORM *form) |
| 3553 | { |
| 3554 | int res; |
| 3555 | |
| 3556 | if (!_nc_Internal_Validation(form)) |
| 3557 | res = E_INVALID_FIELD; |
| 3558 | else |
| 3559 | { |
| 3560 | Call_Hook(form, fieldterm); |
| 3561 | res = fct(form); |
| 3562 | Call_Hook(form, fieldinit); |
| 3563 | } |
| 3564 | return res; |
| 3565 | } |
| 3566 | |
| 3567 | /*--------------------------------------------------------------------------- |
| 3568 | | Facility : libnform |
| 3569 | | Function : static int FN_Next_Field(FORM * form) |
| 3570 | | |
| 3571 | | Description : Move to the next field on the current page of the form |
| 3572 | | |
| 3573 | | Return Values : E_OK - success |
| 3574 | | != E_OK - error from subordinate call |
| 3575 | +--------------------------------------------------------------------------*/ |
| 3576 | static int |
| 3577 | FN_Next_Field(FORM *form) |
| 3578 | { |
| 3579 | T((T_CALLED("FN_Next_Field(%p)"), (void *)form)); |
| 3580 | returnCode(_nc_Set_Current_Field(form, |
| 3581 | Next_Field_On_Page(form->current))); |
| 3582 | } |
| 3583 | |
| 3584 | /*--------------------------------------------------------------------------- |
| 3585 | | Facility : libnform |
| 3586 | | Function : static int FN_Previous_Field(FORM * form) |
| 3587 | | |
| 3588 | | Description : Move to the previous field on the current page of the |
| 3589 | | form |
| 3590 | | |
| 3591 | | Return Values : E_OK - success |
| 3592 | | != E_OK - error from subordinate call |
| 3593 | +--------------------------------------------------------------------------*/ |
| 3594 | static int |
| 3595 | FN_Previous_Field(FORM *form) |
| 3596 | { |
| 3597 | T((T_CALLED("FN_Previous_Field(%p)"), (void *)form)); |
| 3598 | returnCode(_nc_Set_Current_Field(form, |
| 3599 | Previous_Field_On_Page(form->current))); |
| 3600 | } |
| 3601 | |
| 3602 | /*--------------------------------------------------------------------------- |
| 3603 | | Facility : libnform |
| 3604 | | Function : static int FN_First_Field(FORM * form) |
| 3605 | | |
| 3606 | | Description : Move to the first field on the current page of the form |
| 3607 | | |
| 3608 | | Return Values : E_OK - success |
| 3609 | | != E_OK - error from subordinate call |
| 3610 | +--------------------------------------------------------------------------*/ |
| 3611 | static int |
| 3612 | FN_First_Field(FORM *form) |
| 3613 | { |
| 3614 | T((T_CALLED("FN_First_Field(%p)"), (void *)form)); |
| 3615 | returnCode(_nc_Set_Current_Field(form, |
| 3616 | Next_Field_On_Page(form->field[form->page[form->curpage].pmax]))); |
| 3617 | } |
| 3618 | |
| 3619 | /*--------------------------------------------------------------------------- |
| 3620 | | Facility : libnform |
| 3621 | | Function : static int FN_Last_Field(FORM * form) |
| 3622 | | |
| 3623 | | Description : Move to the last field on the current page of the form |
| 3624 | | |
| 3625 | | Return Values : E_OK - success |
| 3626 | | != E_OK - error from subordinate call |
| 3627 | +--------------------------------------------------------------------------*/ |
| 3628 | static int |
| 3629 | FN_Last_Field(FORM *form) |
| 3630 | { |
| 3631 | T((T_CALLED("FN_Last_Field(%p)"), (void *)form)); |
| 3632 | returnCode( |
| 3633 | _nc_Set_Current_Field(form, |
| 3634 | Previous_Field_On_Page(form->field[form->page[form->curpage].pmin]))); |
| 3635 | } |
| 3636 | |
| 3637 | /*--------------------------------------------------------------------------- |
| 3638 | | Facility : libnform |
| 3639 | | Function : static int FN_Sorted_Next_Field(FORM * form) |
| 3640 | | |
| 3641 | | Description : Move to the sorted next field on the current page |
| 3642 | | of the form. |
| 3643 | | |
| 3644 | | Return Values : E_OK - success |
| 3645 | | != E_OK - error from subordinate call |
| 3646 | +--------------------------------------------------------------------------*/ |
| 3647 | static int |
| 3648 | FN_Sorted_Next_Field(FORM *form) |
| 3649 | { |
| 3650 | T((T_CALLED("FN_Sorted_Next_Field(%p)"), (void *)form)); |
| 3651 | returnCode(_nc_Set_Current_Field(form, |
| 3652 | Sorted_Next_Field(form->current))); |
| 3653 | } |
| 3654 | |
| 3655 | /*--------------------------------------------------------------------------- |
| 3656 | | Facility : libnform |
| 3657 | | Function : static int FN_Sorted_Previous_Field(FORM * form) |
| 3658 | | |
| 3659 | | Description : Move to the sorted previous field on the current page |
| 3660 | | of the form. |
| 3661 | | |
| 3662 | | Return Values : E_OK - success |
| 3663 | | != E_OK - error from subordinate call |
| 3664 | +--------------------------------------------------------------------------*/ |
| 3665 | static int |
| 3666 | FN_Sorted_Previous_Field(FORM *form) |
| 3667 | { |
| 3668 | T((T_CALLED("FN_Sorted_Previous_Field(%p)"), (void *)form)); |
| 3669 | returnCode(_nc_Set_Current_Field(form, |
| 3670 | Sorted_Previous_Field(form->current))); |
| 3671 | } |
| 3672 | |
| 3673 | /*--------------------------------------------------------------------------- |
| 3674 | | Facility : libnform |
| 3675 | | Function : static int FN_Sorted_First_Field(FORM * form) |
| 3676 | | |
| 3677 | | Description : Move to the sorted first field on the current page |
| 3678 | | of the form. |
| 3679 | | |
| 3680 | | Return Values : E_OK - success |
| 3681 | | != E_OK - error from subordinate call |
| 3682 | +--------------------------------------------------------------------------*/ |
| 3683 | static int |
| 3684 | FN_Sorted_First_Field(FORM *form) |
| 3685 | { |
| 3686 | T((T_CALLED("FN_Sorted_First_Field(%p)"), (void *)form)); |
| 3687 | returnCode(_nc_Set_Current_Field(form, |
| 3688 | Sorted_Next_Field(form->field[form->page[form->curpage].smax]))); |
| 3689 | } |
| 3690 | |
| 3691 | /*--------------------------------------------------------------------------- |
| 3692 | | Facility : libnform |
| 3693 | | Function : static int FN_Sorted_Last_Field(FORM * form) |
| 3694 | | |
| 3695 | | Description : Move to the sorted last field on the current page |
| 3696 | | of the form. |
| 3697 | | |
| 3698 | | Return Values : E_OK - success |
| 3699 | | != E_OK - error from subordinate call |
| 3700 | +--------------------------------------------------------------------------*/ |
| 3701 | static int |
| 3702 | FN_Sorted_Last_Field(FORM *form) |
| 3703 | { |
| 3704 | T((T_CALLED("FN_Sorted_Last_Field(%p)"), (void *)form)); |
| 3705 | returnCode(_nc_Set_Current_Field(form, |
| 3706 | Sorted_Previous_Field(form->field[form->page[form->curpage].smin]))); |
| 3707 | } |
| 3708 | |
| 3709 | /*--------------------------------------------------------------------------- |
| 3710 | | Facility : libnform |
| 3711 | | Function : static int FN_Left_Field(FORM * form) |
| 3712 | | |
| 3713 | | Description : Get the field on the left of the current field on the |
| 3714 | | same line and the same page. Cycles through the line. |
| 3715 | | |
| 3716 | | Return Values : E_OK - success |
| 3717 | | != E_OK - error from subordinate call |
| 3718 | +--------------------------------------------------------------------------*/ |
| 3719 | static int |
| 3720 | FN_Left_Field(FORM *form) |
| 3721 | { |
| 3722 | T((T_CALLED("FN_Left_Field(%p)"), (void *)form)); |
| 3723 | returnCode(_nc_Set_Current_Field(form, |
| 3724 | Left_Neighbor_Field(form->current))); |
| 3725 | } |
| 3726 | |
| 3727 | /*--------------------------------------------------------------------------- |
| 3728 | | Facility : libnform |
| 3729 | | Function : static int FN_Right_Field(FORM * form) |
| 3730 | | |
| 3731 | | Description : Get the field on the right of the current field on the |
| 3732 | | same line and the same page. Cycles through the line. |
| 3733 | | |
| 3734 | | Return Values : E_OK - success |
| 3735 | | != E_OK - error from subordinate call |
| 3736 | +--------------------------------------------------------------------------*/ |
| 3737 | static int |
| 3738 | FN_Right_Field(FORM *form) |
| 3739 | { |
| 3740 | T((T_CALLED("FN_Right_Field(%p)"), (void *)form)); |
| 3741 | returnCode(_nc_Set_Current_Field(form, |
| 3742 | Right_Neighbor_Field(form->current))); |
| 3743 | } |
| 3744 | |
| 3745 | /*--------------------------------------------------------------------------- |
| 3746 | | Facility : libnform |
| 3747 | | Function : static int FN_Up_Field(FORM * form) |
| 3748 | | |
| 3749 | | Description : Get the upper neighbor of the current field. This |
| 3750 | | cycles through the page. See the comments of the |
| 3751 | | Upper_Neighbor_Field function to understand how |
| 3752 | | 'upper' is defined. |
| 3753 | | |
| 3754 | | Return Values : E_OK - success |
| 3755 | | != E_OK - error from subordinate call |
| 3756 | +--------------------------------------------------------------------------*/ |
| 3757 | static int |
| 3758 | FN_Up_Field(FORM *form) |
| 3759 | { |
| 3760 | T((T_CALLED("FN_Up_Field(%p)"), (void *)form)); |
| 3761 | returnCode(_nc_Set_Current_Field(form, |
| 3762 | Upper_Neighbor_Field(form->current))); |
| 3763 | } |
| 3764 | |
| 3765 | /*--------------------------------------------------------------------------- |
| 3766 | | Facility : libnform |
| 3767 | | Function : static int FN_Down_Field(FORM * form) |
| 3768 | | |
| 3769 | | Description : Get the down neighbor of the current field. This |
| 3770 | | cycles through the page. See the comments of the |
| 3771 | | Down_Neighbor_Field function to understand how |
| 3772 | | 'down' is defined. |
| 3773 | | |
| 3774 | | Return Values : E_OK - success |
| 3775 | | != E_OK - error from subordinate call |
| 3776 | +--------------------------------------------------------------------------*/ |
| 3777 | static int |
| 3778 | FN_Down_Field(FORM *form) |
| 3779 | { |
| 3780 | T((T_CALLED("FN_Down_Field(%p)"), (void *)form)); |
| 3781 | returnCode(_nc_Set_Current_Field(form, |
| 3782 | Down_Neighbor_Field(form->current))); |
| 3783 | } |
| 3784 | /*---------------------------------------------------------------------------- |
| 3785 | END of Field Navigation routines |
| 3786 | --------------------------------------------------------------------------*/ |
| 3787 | |
| 3788 | /*---------------------------------------------------------------------------- |
| 3789 | Helper routines for Page Navigation |
| 3790 | --------------------------------------------------------------------------*/ |
| 3791 | |
| 3792 | /*--------------------------------------------------------------------------- |
| 3793 | | Facility : libnform |
| 3794 | | Function : int _nc_Set_Form_Page(FORM * form, |
| 3795 | | int page, |
| 3796 | | FIELD * field) |
| 3797 | | |
| 3798 | | Description : Make the given page number the current page and make |
| 3799 | | the given field the current field on the page. If |
| 3800 | | for the field NULL is given, make the first field on |
| 3801 | | the page the current field. The routine acts only |
| 3802 | | if the requested page is not the current page. |
| 3803 | | |
| 3804 | | Return Values : E_OK - success |
| 3805 | | != E_OK - error from subordinate call |
| 3806 | | E_BAD_ARGUMENT - invalid field pointer |
| 3807 | | E_SYSTEM_ERROR - some severe basic error |
| 3808 | +--------------------------------------------------------------------------*/ |
| 3809 | NCURSES_EXPORT(int) |
| 3810 | _nc_Set_Form_Page(FORM *form, int page, FIELD *field) |
| 3811 | { |
| 3812 | int res = E_OK; |
| 3813 | |
| 3814 | if ((form->curpage != page)) |
| 3815 | { |
| 3816 | FIELD *last_field, *field_on_page; |
| 3817 | |
| 3818 | werase(Get_Form_Window(form)); |
| 3819 | form->curpage = page; |
| 3820 | last_field = field_on_page = form->field[form->page[page].smin]; |
| 3821 | do |
| 3822 | { |
| 3823 | if (field_on_page->opts & O_VISIBLE) |
| 3824 | if ((res = Display_Field(field_on_page)) != E_OK) |
| 3825 | return (res); |
| 3826 | field_on_page = field_on_page->snext; |
| 3827 | } |
| 3828 | while (field_on_page != last_field); |
| 3829 | |
| 3830 | if (field) |
| 3831 | res = _nc_Set_Current_Field(form, field); |
| 3832 | else |
| 3833 | /* N.B.: we don't encapsulate this by Inter_Field_Navigation(), |
| 3834 | because this is already executed in a page navigation |
| 3835 | context that contains field navigation |
| 3836 | */ |
| 3837 | res = FN_First_Field(form); |
| 3838 | } |
| 3839 | return (res); |
| 3840 | } |
| 3841 | |
| 3842 | /*--------------------------------------------------------------------------- |
| 3843 | | Facility : libnform |
| 3844 | | Function : static int Next_Page_Number(const FORM * form) |
| 3845 | | |
| 3846 | | Description : Calculate the page number following the current page |
| 3847 | | number. This cycles if the highest page number is |
| 3848 | | reached. |
| 3849 | | |
| 3850 | | Return Values : The next page number |
| 3851 | +--------------------------------------------------------------------------*/ |
| 3852 | NCURSES_INLINE static int |
| 3853 | Next_Page_Number(const FORM *form) |
| 3854 | { |
| 3855 | return (form->curpage + 1) % form->maxpage; |
| 3856 | } |
| 3857 | |
| 3858 | /*--------------------------------------------------------------------------- |
| 3859 | | Facility : libnform |
| 3860 | | Function : static int Previous_Page_Number(const FORM * form) |
| 3861 | | |
| 3862 | | Description : Calculate the page number before the current page |
| 3863 | | number. This cycles if the first page number is |
| 3864 | | reached. |
| 3865 | | |
| 3866 | | Return Values : The previous page number |
| 3867 | +--------------------------------------------------------------------------*/ |
| 3868 | NCURSES_INLINE static int |
| 3869 | Previous_Page_Number(const FORM *form) |
| 3870 | { |
| 3871 | return (form->curpage != 0 ? form->curpage - 1 : form->maxpage - 1); |
| 3872 | } |
| 3873 | |
| 3874 | /*---------------------------------------------------------------------------- |
| 3875 | Page Navigation routines |
| 3876 | --------------------------------------------------------------------------*/ |
| 3877 | |
| 3878 | /*--------------------------------------------------------------------------- |
| 3879 | | Facility : libnform |
| 3880 | | Function : static int Page_Navigation( |
| 3881 | | int (* const fct) (FORM *), |
| 3882 | | FORM * form) |
| 3883 | | |
| 3884 | | Description : Generic behavior for changing a page. This means |
| 3885 | | that the field is left and a new field is entered. |
| 3886 | | So the field must be validated and the field init/term |
| 3887 | | hooks must be called. Because also the page is changed, |
| 3888 | | the forms init/term hooks must be called also. |
| 3889 | | |
| 3890 | | Return Values : E_OK - success |
| 3891 | | E_INVALID_FIELD - field is invalid |
| 3892 | | some other - error from subordinate call |
| 3893 | +--------------------------------------------------------------------------*/ |
| 3894 | static int |
| 3895 | Page_Navigation(int (*const fct) (FORM *), FORM *form) |
| 3896 | { |
| 3897 | int res; |
| 3898 | |
| 3899 | if (!_nc_Internal_Validation(form)) |
| 3900 | res = E_INVALID_FIELD; |
| 3901 | else |
| 3902 | { |
| 3903 | Call_Hook(form, fieldterm); |
| 3904 | Call_Hook(form, formterm); |
| 3905 | res = fct(form); |
| 3906 | Call_Hook(form, forminit); |
| 3907 | Call_Hook(form, fieldinit); |
| 3908 | } |
| 3909 | return res; |
| 3910 | } |
| 3911 | |
| 3912 | /*--------------------------------------------------------------------------- |
| 3913 | | Facility : libnform |
| 3914 | | Function : static int PN_Next_Page(FORM * form) |
| 3915 | | |
| 3916 | | Description : Move to the next page of the form |
| 3917 | | |
| 3918 | | Return Values : E_OK - success |
| 3919 | | != E_OK - error from subordinate call |
| 3920 | +--------------------------------------------------------------------------*/ |
| 3921 | static int |
| 3922 | PN_Next_Page(FORM *form) |
| 3923 | { |
| 3924 | T((T_CALLED("PN_Next_Page(%p)"), (void *)form)); |
| 3925 | returnCode(_nc_Set_Form_Page(form, Next_Page_Number(form), (FIELD *)0)); |
| 3926 | } |
| 3927 | |
| 3928 | /*--------------------------------------------------------------------------- |
| 3929 | | Facility : libnform |
| 3930 | | Function : static int PN_Previous_Page(FORM * form) |
| 3931 | | |
| 3932 | | Description : Move to the previous page of the form |
| 3933 | | |
| 3934 | | Return Values : E_OK - success |
| 3935 | | != E_OK - error from subordinate call |
| 3936 | +--------------------------------------------------------------------------*/ |
| 3937 | static int |
| 3938 | PN_Previous_Page(FORM *form) |
| 3939 | { |
| 3940 | T((T_CALLED("PN_Previous_Page(%p)"), (void *)form)); |
| 3941 | returnCode(_nc_Set_Form_Page(form, Previous_Page_Number(form), (FIELD *)0)); |
| 3942 | } |
| 3943 | |
| 3944 | /*--------------------------------------------------------------------------- |
| 3945 | | Facility : libnform |
| 3946 | | Function : static int PN_First_Page(FORM * form) |
| 3947 | | |
| 3948 | | Description : Move to the first page of the form |
| 3949 | | |
| 3950 | | Return Values : E_OK - success |
| 3951 | | != E_OK - error from subordinate call |
| 3952 | +--------------------------------------------------------------------------*/ |
| 3953 | static int |
| 3954 | PN_First_Page(FORM *form) |
| 3955 | { |
| 3956 | T((T_CALLED("PN_First_Page(%p)"), (void *)form)); |
| 3957 | returnCode(_nc_Set_Form_Page(form, 0, (FIELD *)0)); |
| 3958 | } |
| 3959 | |
| 3960 | /*--------------------------------------------------------------------------- |
| 3961 | | Facility : libnform |
| 3962 | | Function : static int PN_Last_Page(FORM * form) |
| 3963 | | |
| 3964 | | Description : Move to the last page of the form |
| 3965 | | |
| 3966 | | Return Values : E_OK - success |
| 3967 | | != E_OK - error from subordinate call |
| 3968 | +--------------------------------------------------------------------------*/ |
| 3969 | static int |
| 3970 | PN_Last_Page(FORM *form) |
| 3971 | { |
| 3972 | T((T_CALLED("PN_Last_Page(%p)"), (void *)form)); |
| 3973 | returnCode(_nc_Set_Form_Page(form, form->maxpage - 1, (FIELD *)0)); |
| 3974 | } |
| 3975 | |
| 3976 | /*---------------------------------------------------------------------------- |
| 3977 | END of Field Navigation routines |
| 3978 | --------------------------------------------------------------------------*/ |
| 3979 | |
| 3980 | /*---------------------------------------------------------------------------- |
| 3981 | Helper routines for the core form driver. |
| 3982 | --------------------------------------------------------------------------*/ |
| 3983 | |
| 3984 | /*--------------------------------------------------------------------------- |
| 3985 | | Facility : libnform |
| 3986 | | Function : static int Data_Entry(FORM * form,int c) |
| 3987 | | |
| 3988 | | Description : Enter character c into at the current position of the |
| 3989 | | current field of the form. |
| 3990 | | |
| 3991 | | Return Values : E_OK - success |
| 3992 | | E_REQUEST_DENIED - driver could not process the request |
| 3993 | | E_SYSTEM_ERROR - |
| 3994 | +--------------------------------------------------------------------------*/ |
| 3995 | static int |
| 3996 | Data_Entry(FORM *form, int c) |
| 3997 | { |
| 3998 | FIELD *field = form->current; |
| 3999 | int result = E_REQUEST_DENIED; |
| 4000 | |
| 4001 | T((T_CALLED("Data_Entry(%p,%s)"), (void *)form, _tracechtype((chtype)c))); |
| 4002 | if ((field->opts & O_EDIT) |
| 4003 | #if FIX_FORM_INACTIVE_BUG |
| 4004 | && (field->opts & O_ACTIVE) |
| 4005 | #endif |
| 4006 | ) |
| 4007 | { |
| 4008 | if ((field->opts & O_BLANK) && |
| 4009 | First_Position_In_Current_Field(form) && |
| 4010 | !(form->status & _FCHECK_REQUIRED) && |
| 4011 | !(form->status & _WINDOW_MODIFIED)) |
| 4012 | werase(form->w); |
| 4013 | |
| 4014 | if (form->status & _OVLMODE) |
| 4015 | { |
| 4016 | waddch(form->w, (chtype)c); |
| 4017 | } |
| 4018 | else |
| 4019 | /* no _OVLMODE */ |
| 4020 | { |
| 4021 | bool There_Is_Room = Is_There_Room_For_A_Char_In_Line(form); |
| 4022 | |
| 4023 | if (!(There_Is_Room || |
| 4024 | ((Single_Line_Field(field) && Growable(field))))) |
| 4025 | RETURN(E_REQUEST_DENIED); |
| 4026 | |
| 4027 | if (!There_Is_Room && !Field_Grown(field, 1)) |
| 4028 | RETURN(E_SYSTEM_ERROR); |
| 4029 | |
| 4030 | winsch(form->w, (chtype)c); |
| 4031 | } |
| 4032 | |
| 4033 | if ((result = Wrapping_Not_Necessary_Or_Wrapping_Ok(form)) == E_OK) |
| 4034 | { |
| 4035 | bool End_Of_Field = (((field->drows - 1) == form->currow) && |
| 4036 | ((field->dcols - 1) == form->curcol)); |
| 4037 | |
| 4038 | form->status |= _WINDOW_MODIFIED; |
| 4039 | if (End_Of_Field && !Growable(field) && (field->opts & O_AUTOSKIP)) |
| 4040 | result = Inter_Field_Navigation(FN_Next_Field, form); |
| 4041 | else |
| 4042 | { |
| 4043 | if (End_Of_Field && Growable(field) && !Field_Grown(field, 1)) |
| 4044 | result = E_SYSTEM_ERROR; |
| 4045 | else |
| 4046 | { |
| 4047 | #if USE_WIDEC_SUPPORT |
| 4048 | /* |
| 4049 | * We have just added a byte to the form field. It may have |
| 4050 | * been part of a multibyte character. If it was, the |
| 4051 | * addch_used field is nonzero and we should not try to move |
| 4052 | * to a new column. |
| 4053 | */ |
| 4054 | if (WINDOW_EXT(form->w, addch_used) == 0) |
| 4055 | IFN_Next_Character(form); |
| 4056 | #else |
| 4057 | IFN_Next_Character(form); |
| 4058 | #endif |
| 4059 | result = E_OK; |
| 4060 | } |
| 4061 | } |
| 4062 | } |
| 4063 | } |
| 4064 | RETURN(result); |
| 4065 | } |
| 4066 | |
| 4067 | /* Structure to describe the binding of a request code to a function. |
| 4068 | The member keycode codes the request value as well as the generic |
| 4069 | routine to use for the request. The code for the generic routine |
| 4070 | is coded in the upper 16 Bits while the request code is coded in |
| 4071 | the lower 16 bits. |
| 4072 | |
| 4073 | In terms of C++ you might think of a request as a class with a |
| 4074 | virtual method "perform". The different types of request are |
| 4075 | derived from this base class and overload (or not) the base class |
| 4076 | implementation of perform. |
| 4077 | */ |
| 4078 | typedef struct |
| 4079 | { |
| 4080 | int keycode; /* must be at least 32 bit: hi:mode, lo: key */ |
| 4081 | int (*cmd) (FORM *); /* low level driver routine for this key */ |
| 4082 | } |
| 4083 | Binding_Info; |
| 4084 | |
| 4085 | /* You may see this is the class-id of the request type class */ |
| 4086 | #define ID_PN (0x00000000) /* Page navigation */ |
| 4087 | #define ID_FN (0x00010000) /* Inter-Field navigation */ |
| 4088 | #define ID_IFN (0x00020000) /* Intra-Field navigation */ |
| 4089 | #define ID_VSC (0x00030000) /* Vertical Scrolling */ |
| 4090 | #define ID_HSC (0x00040000) /* Horizontal Scrolling */ |
| 4091 | #define ID_FE (0x00050000) /* Field Editing */ |
| 4092 | #define ID_EM (0x00060000) /* Edit Mode */ |
| 4093 | #define ID_FV (0x00070000) /* Field Validation */ |
| 4094 | #define ID_CH (0x00080000) /* Choice */ |
| 4095 | #define ID_Mask (0xffff0000) |
| 4096 | #define Key_Mask (0x0000ffff) |
| 4097 | #define ID_Shft (16) |
| 4098 | |
| 4099 | /* This array holds all the Binding Infos */ |
| 4100 | /* *INDENT-OFF* */ |
| 4101 | static const Binding_Info bindings[MAX_FORM_COMMAND - MIN_FORM_COMMAND + 1] = |
| 4102 | { |
| 4103 | { REQ_NEXT_PAGE |ID_PN ,PN_Next_Page}, |
| 4104 | { REQ_PREV_PAGE |ID_PN ,PN_Previous_Page}, |
| 4105 | { REQ_FIRST_PAGE |ID_PN ,PN_First_Page}, |
| 4106 | { REQ_LAST_PAGE |ID_PN ,PN_Last_Page}, |
| 4107 | |
| 4108 | { REQ_NEXT_FIELD |ID_FN ,FN_Next_Field}, |
| 4109 | { REQ_PREV_FIELD |ID_FN ,FN_Previous_Field}, |
| 4110 | { REQ_FIRST_FIELD |ID_FN ,FN_First_Field}, |
| 4111 | { REQ_LAST_FIELD |ID_FN ,FN_Last_Field}, |
| 4112 | { REQ_SNEXT_FIELD |ID_FN ,FN_Sorted_Next_Field}, |
| 4113 | { REQ_SPREV_FIELD |ID_FN ,FN_Sorted_Previous_Field}, |
| 4114 | { REQ_SFIRST_FIELD |ID_FN ,FN_Sorted_First_Field}, |
| 4115 | { REQ_SLAST_FIELD |ID_FN ,FN_Sorted_Last_Field}, |
| 4116 | { REQ_LEFT_FIELD |ID_FN ,FN_Left_Field}, |
| 4117 | { REQ_RIGHT_FIELD |ID_FN ,FN_Right_Field}, |
| 4118 | { REQ_UP_FIELD |ID_FN ,FN_Up_Field}, |
| 4119 | { REQ_DOWN_FIELD |ID_FN ,FN_Down_Field}, |
| 4120 | |
| 4121 | { REQ_NEXT_CHAR |ID_IFN ,IFN_Next_Character}, |
| 4122 | { REQ_PREV_CHAR |ID_IFN ,IFN_Previous_Character}, |
| 4123 | { REQ_NEXT_LINE |ID_IFN ,IFN_Next_Line}, |
| 4124 | { REQ_PREV_LINE |ID_IFN ,IFN_Previous_Line}, |
| 4125 | { REQ_NEXT_WORD |ID_IFN ,IFN_Next_Word}, |
| 4126 | { REQ_PREV_WORD |ID_IFN ,IFN_Previous_Word}, |
| 4127 | { REQ_BEG_FIELD |ID_IFN ,IFN_Beginning_Of_Field}, |
| 4128 | { REQ_END_FIELD |ID_IFN ,IFN_End_Of_Field}, |
| 4129 | { REQ_BEG_LINE |ID_IFN ,IFN_Beginning_Of_Line}, |
| 4130 | { REQ_END_LINE |ID_IFN ,IFN_End_Of_Line}, |
| 4131 | { REQ_LEFT_CHAR |ID_IFN ,IFN_Left_Character}, |
| 4132 | { REQ_RIGHT_CHAR |ID_IFN ,IFN_Right_Character}, |
| 4133 | { REQ_UP_CHAR |ID_IFN ,IFN_Up_Character}, |
| 4134 | { REQ_DOWN_CHAR |ID_IFN ,IFN_Down_Character}, |
| 4135 | |
| 4136 | { REQ_NEW_LINE |ID_FE ,FE_New_Line}, |
| 4137 | { REQ_INS_CHAR |ID_FE ,FE_Insert_Character}, |
| 4138 | { REQ_INS_LINE |ID_FE ,FE_Insert_Line}, |
| 4139 | { REQ_DEL_CHAR |ID_FE ,FE_Delete_Character}, |
| 4140 | { REQ_DEL_PREV |ID_FE ,FE_Delete_Previous}, |
| 4141 | { REQ_DEL_LINE |ID_FE ,FE_Delete_Line}, |
| 4142 | { REQ_DEL_WORD |ID_FE ,FE_Delete_Word}, |
| 4143 | { REQ_CLR_EOL |ID_FE ,FE_Clear_To_End_Of_Line}, |
| 4144 | { REQ_CLR_EOF |ID_FE ,FE_Clear_To_End_Of_Field}, |
| 4145 | { REQ_CLR_FIELD |ID_FE ,FE_Clear_Field}, |
| 4146 | |
| 4147 | { REQ_OVL_MODE |ID_EM ,EM_Overlay_Mode}, |
| 4148 | { REQ_INS_MODE |ID_EM ,EM_Insert_Mode}, |
| 4149 | |
| 4150 | { REQ_SCR_FLINE |ID_VSC ,VSC_Scroll_Line_Forward}, |
| 4151 | { REQ_SCR_BLINE |ID_VSC ,VSC_Scroll_Line_Backward}, |
| 4152 | { REQ_SCR_FPAGE |ID_VSC ,VSC_Scroll_Page_Forward}, |
| 4153 | { REQ_SCR_BPAGE |ID_VSC ,VSC_Scroll_Page_Backward}, |
| 4154 | { REQ_SCR_FHPAGE |ID_VSC ,VSC_Scroll_Half_Page_Forward}, |
| 4155 | { REQ_SCR_BHPAGE |ID_VSC ,VSC_Scroll_Half_Page_Backward}, |
| 4156 | |
| 4157 | { REQ_SCR_FCHAR |ID_HSC ,HSC_Scroll_Char_Forward}, |
| 4158 | { REQ_SCR_BCHAR |ID_HSC ,HSC_Scroll_Char_Backward}, |
| 4159 | { REQ_SCR_HFLINE |ID_HSC ,HSC_Horizontal_Line_Forward}, |
| 4160 | { REQ_SCR_HBLINE |ID_HSC ,HSC_Horizontal_Line_Backward}, |
| 4161 | { REQ_SCR_HFHALF |ID_HSC ,HSC_Horizontal_Half_Line_Forward}, |
| 4162 | { REQ_SCR_HBHALF |ID_HSC ,HSC_Horizontal_Half_Line_Backward}, |
| 4163 | |
| 4164 | { REQ_VALIDATION |ID_FV ,FV_Validation}, |
| 4165 | |
| 4166 | { REQ_NEXT_CHOICE |ID_CH ,CR_Next_Choice}, |
| 4167 | { REQ_PREV_CHOICE |ID_CH ,CR_Previous_Choice} |
| 4168 | }; |
| 4169 | /* *INDENT-ON* */ |
| 4170 | |
| 4171 | /*--------------------------------------------------------------------------- |
| 4172 | | Facility : libnform |
| 4173 | | Function : int form_driver(FORM * form,int c) |
| 4174 | | |
| 4175 | | Description : This is the workhorse of the forms system. It checks |
| 4176 | | to determine whether the character c is a request or |
| 4177 | | data. If it is a request, the form driver executes |
| 4178 | | the request and returns the result. If it is data |
| 4179 | | (printable character), it enters the data into the |
| 4180 | | current position in the current field. If it is not |
| 4181 | | recognized, the form driver assumes it is an application |
| 4182 | | defined command and returns E_UNKNOWN_COMMAND. |
| 4183 | | Application defined command should be defined relative |
| 4184 | | to MAX_FORM_COMMAND, the maximum value of a request. |
| 4185 | | |
| 4186 | | Return Values : E_OK - success |
| 4187 | | E_SYSTEM_ERROR - system error |
| 4188 | | E_BAD_ARGUMENT - an argument is incorrect |
| 4189 | | E_NOT_POSTED - form is not posted |
| 4190 | | E_INVALID_FIELD - field contents are invalid |
| 4191 | | E_BAD_STATE - called from inside a hook routine |
| 4192 | | E_REQUEST_DENIED - request failed |
| 4193 | | E_NOT_CONNECTED - no fields are connected to the form |
| 4194 | | E_UNKNOWN_COMMAND - command not known |
| 4195 | +--------------------------------------------------------------------------*/ |
| 4196 | NCURSES_EXPORT(int) |
| 4197 | form_driver(FORM *form, int c) |
| 4198 | { |
| 4199 | const Binding_Info *BI = (Binding_Info *) 0; |
| 4200 | int res = E_UNKNOWN_COMMAND; |
| 4201 | |
| 4202 | T((T_CALLED("form_driver(%p,%d)"), (void *)form, c)); |
| 4203 | |
| 4204 | if (!form) |
| 4205 | RETURN(E_BAD_ARGUMENT); |
| 4206 | |
| 4207 | if (!(form->field)) |
| 4208 | RETURN(E_NOT_CONNECTED); |
| 4209 | |
| 4210 | assert(form->page); |
| 4211 | |
| 4212 | if (c == FIRST_ACTIVE_MAGIC) |
| 4213 | { |
| 4214 | form->current = _nc_First_Active_Field(form); |
| 4215 | RETURN(E_OK); |
| 4216 | } |
| 4217 | |
| 4218 | assert(form->current && |
| 4219 | form->current->buf && |
| 4220 | (form->current->form == form) |
| 4221 | ); |
| 4222 | |
| 4223 | if (form->status & _IN_DRIVER) |
| 4224 | RETURN(E_BAD_STATE); |
| 4225 | |
| 4226 | if (!(form->status & _POSTED)) |
| 4227 | RETURN(E_NOT_POSTED); |
| 4228 | |
| 4229 | if ((c >= MIN_FORM_COMMAND && c <= MAX_FORM_COMMAND) && |
| 4230 | ((bindings[c - MIN_FORM_COMMAND].keycode & Key_Mask) == c)) |
| 4231 | BI = &(bindings[c - MIN_FORM_COMMAND]); |
| 4232 | |
| 4233 | if (BI) |
| 4234 | { |
| 4235 | typedef int (*Generic_Method) (int (*const) (FORM *), FORM *); |
| 4236 | static const Generic_Method Generic_Methods[] = |
| 4237 | { |
| 4238 | Page_Navigation, /* overloaded to call field&form hooks */ |
| 4239 | Inter_Field_Navigation, /* overloaded to call field hooks */ |
| 4240 | NULL, /* Intra-Field is generic */ |
| 4241 | Vertical_Scrolling, /* Overloaded to check multi-line */ |
| 4242 | Horizontal_Scrolling, /* Overloaded to check single-line */ |
| 4243 | Field_Editing, /* Overloaded to mark modification */ |
| 4244 | NULL, /* Edit Mode is generic */ |
| 4245 | NULL, /* Field Validation is generic */ |
| 4246 | NULL /* Choice Request is generic */ |
| 4247 | }; |
| 4248 | size_t nMethods = (sizeof(Generic_Methods) / sizeof(Generic_Methods[0])); |
| 4249 | size_t method = (BI->keycode >> ID_Shft) & 0xffff; /* see ID_Mask */ |
| 4250 | |
| 4251 | if ((method >= nMethods) || !(BI->cmd)) |
| 4252 | res = E_SYSTEM_ERROR; |
| 4253 | else |
| 4254 | { |
| 4255 | Generic_Method fct = Generic_Methods[method]; |
| 4256 | |
| 4257 | if (fct) |
| 4258 | res = fct(BI->cmd, form); |
| 4259 | else |
| 4260 | res = (BI->cmd) (form); |
| 4261 | } |
| 4262 | } |
| 4263 | #ifdef NCURSES_MOUSE_VERSION |
| 4264 | else if (KEY_MOUSE == c) |
| 4265 | { |
| 4266 | MEVENT event; |
| 4267 | WINDOW *win = form->win ? form->win : StdScreen(Get_Form_Screen(form)); |
| 4268 | WINDOW *sub = form->sub ? form->sub : win; |
| 4269 | |
| 4270 | getmouse(&event); |
| 4271 | if ((event.bstate & (BUTTON1_CLICKED | |
| 4272 | BUTTON1_DOUBLE_CLICKED | |
| 4273 | BUTTON1_TRIPLE_CLICKED)) |
| 4274 | && wenclose(win, event.y, event.x)) |
| 4275 | { /* we react only if the click was in the userwin, that means |
| 4276 | * inside the form display area or at the decoration window. |
| 4277 | */ |
| 4278 | int ry = event.y, rx = event.x; /* screen coordinates */ |
| 4279 | |
| 4280 | res = E_REQUEST_DENIED; |
| 4281 | if (mouse_trafo(&ry, &rx, FALSE)) |
| 4282 | { /* rx, ry are now "curses" coordinates */ |
| 4283 | if (ry < sub->_begy) |
| 4284 | { /* we clicked above the display region; this is |
| 4285 | * interpreted as "scroll up" request |
| 4286 | */ |
| 4287 | if (event.bstate & BUTTON1_CLICKED) |
| 4288 | res = form_driver(form, REQ_PREV_FIELD); |
| 4289 | else if (event.bstate & BUTTON1_DOUBLE_CLICKED) |
| 4290 | res = form_driver(form, REQ_PREV_PAGE); |
| 4291 | else if (event.bstate & BUTTON1_TRIPLE_CLICKED) |
| 4292 | res = form_driver(form, REQ_FIRST_FIELD); |
| 4293 | } |
| 4294 | else if (ry > sub->_begy + sub->_maxy) |
| 4295 | { /* we clicked below the display region; this is |
| 4296 | * interpreted as "scroll down" request |
| 4297 | */ |
| 4298 | if (event.bstate & BUTTON1_CLICKED) |
| 4299 | res = form_driver(form, REQ_NEXT_FIELD); |
| 4300 | else if (event.bstate & BUTTON1_DOUBLE_CLICKED) |
| 4301 | res = form_driver(form, REQ_NEXT_PAGE); |
| 4302 | else if (event.bstate & BUTTON1_TRIPLE_CLICKED) |
| 4303 | res = form_driver(form, REQ_LAST_FIELD); |
| 4304 | } |
| 4305 | else if (wenclose(sub, event.y, event.x)) |
| 4306 | { /* Inside the area we try to find the hit item */ |
| 4307 | int i; |
| 4308 | |
| 4309 | ry = event.y; |
| 4310 | rx = event.x; |
| 4311 | if (wmouse_trafo(sub, &ry, &rx, FALSE)) |
| 4312 | { |
| 4313 | int min_field = form->page[form->curpage].pmin; |
| 4314 | int max_field = form->page[form->curpage].pmax; |
| 4315 | |
| 4316 | for (i = min_field; i <= max_field; ++i) |
| 4317 | { |
| 4318 | FIELD *field = form->field[i]; |
| 4319 | |
| 4320 | if (Field_Is_Selectable(field) |
| 4321 | && Field_encloses(field, ry, rx) == E_OK) |
| 4322 | { |
| 4323 | res = _nc_Set_Current_Field(form, field); |
| 4324 | if (res == E_OK) |
| 4325 | res = _nc_Position_Form_Cursor(form); |
| 4326 | if (res == E_OK |
| 4327 | && (event.bstate & BUTTON1_DOUBLE_CLICKED)) |
| 4328 | res = E_UNKNOWN_COMMAND; |
| 4329 | break; |
| 4330 | } |
| 4331 | } |
| 4332 | } |
| 4333 | } |
| 4334 | } |
| 4335 | } |
| 4336 | else |
| 4337 | res = E_REQUEST_DENIED; |
| 4338 | } |
| 4339 | #endif /* NCURSES_MOUSE_VERSION */ |
| 4340 | else if (!(c & (~(int)MAX_REGULAR_CHARACTER))) |
| 4341 | { |
| 4342 | /* |
| 4343 | * If we're using 8-bit characters, iscntrl+isprint cover the whole set. |
| 4344 | * But with multibyte characters, there is a third possibility, i.e., |
| 4345 | * parts of characters that build up into printable characters which are |
| 4346 | * not considered printable. |
| 4347 | * |
| 4348 | * FIXME: the wide-character branch should also use Check_Char(). |
| 4349 | */ |
| 4350 | #if USE_WIDEC_SUPPORT |
| 4351 | if (!iscntrl(UChar(c))) |
| 4352 | #else |
| 4353 | if (isprint(UChar(c)) && |
| 4354 | Check_Char(form, form->current, form->current->type, c, |
| 4355 | (TypeArgument *)(form->current->arg))) |
| 4356 | #endif |
| 4357 | res = Data_Entry(form, c); |
| 4358 | } |
| 4359 | _nc_Refresh_Current_Field(form); |
| 4360 | RETURN(res); |
| 4361 | } |
| 4362 | |
| 4363 | /*---------------------------------------------------------------------------- |
| 4364 | Field-Buffer manipulation routines. |
| 4365 | The effects of setting a buffer are tightly coupled to the core of the form |
| 4366 | driver logic. This is especially true in the case of growable fields. |
| 4367 | So I don't separate this into a separate module. |
| 4368 | --------------------------------------------------------------------------*/ |
| 4369 | |
| 4370 | /*--------------------------------------------------------------------------- |
| 4371 | | Facility : libnform |
| 4372 | | Function : int set_field_buffer(FIELD *field, |
| 4373 | | int buffer, char *value) |
| 4374 | | |
| 4375 | | Description : Set the given buffer of the field to the given value. |
| 4376 | | Buffer 0 stores the displayed content of the field. |
| 4377 | | For dynamic fields this may grow the fieldbuffers if |
| 4378 | | the length of the value exceeds the current buffer |
| 4379 | | length. For buffer 0 only printable values are allowed. |
| 4380 | | For static fields, the value needs not to be zero ter- |
| 4381 | | minated. It is copied up to the length of the buffer. |
| 4382 | | |
| 4383 | | Return Values : E_OK - success |
| 4384 | | E_BAD_ARGUMENT - invalid argument |
| 4385 | | E_SYSTEM_ERROR - system error |
| 4386 | +--------------------------------------------------------------------------*/ |
| 4387 | NCURSES_EXPORT(int) |
| 4388 | set_field_buffer(FIELD *field, int buffer, const char *value) |
| 4389 | { |
| 4390 | FIELD_CELL *p; |
| 4391 | int res = E_OK; |
| 4392 | unsigned int i; |
| 4393 | unsigned int len; |
| 4394 | |
| 4395 | #if USE_WIDEC_SUPPORT |
| 4396 | FIELD_CELL *widevalue = 0; |
| 4397 | #endif |
| 4398 | |
| 4399 | T((T_CALLED("set_field_buffer(%p,%d,%s)"), (void *)field, buffer, _nc_visbuf(value))); |
| 4400 | |
| 4401 | if (!field || !value || ((buffer < 0) || (buffer > field->nbuf))) |
| 4402 | RETURN(E_BAD_ARGUMENT); |
| 4403 | |
| 4404 | len = Buffer_Length(field); |
| 4405 | |
| 4406 | if (Growable(field)) |
| 4407 | { |
| 4408 | /* for a growable field we must assume zero terminated strings, because |
| 4409 | somehow we have to detect the length of what should be copied. |
| 4410 | */ |
| 4411 | unsigned int vlen = strlen(value); |
| 4412 | |
| 4413 | if (vlen > len) |
| 4414 | { |
| 4415 | if (!Field_Grown(field, |
| 4416 | (int)(1 + (vlen - len) / ((field->rows + field->nrow) |
| 4417 | * field->cols)))) |
| 4418 | RETURN(E_SYSTEM_ERROR); |
| 4419 | |
| 4420 | #if !USE_WIDEC_SUPPORT |
| 4421 | len = vlen; |
| 4422 | #endif |
| 4423 | } |
| 4424 | } |
| 4425 | |
| 4426 | p = Address_Of_Nth_Buffer(field, buffer); |
| 4427 | |
| 4428 | #if USE_WIDEC_SUPPORT |
| 4429 | /* |
| 4430 | * Use addstr's logic for converting a string to an array of cchar_t's. |
| 4431 | * There should be a better way, but this handles nonspacing characters |
| 4432 | * and other special cases that we really do not want to handle here. |
| 4433 | */ |
| 4434 | #if NCURSES_EXT_FUNCS |
| 4435 | if (wresize(field->working, 1, Buffer_Length(field) + 1) == ERR) |
| 4436 | #endif |
| 4437 | { |
| 4438 | delwin(field->working); |
| 4439 | field->working = newpad(1, Buffer_Length(field) + 1); |
| 4440 | } |
| 4441 | len = Buffer_Length(field); |
| 4442 | wclear(field->working); |
| 4443 | (void)mvwaddstr(field->working, 0, 0, value); |
| 4444 | |
| 4445 | if ((widevalue = typeCalloc(FIELD_CELL, len + 1)) == 0) |
| 4446 | { |
| 4447 | RETURN(E_SYSTEM_ERROR); |
| 4448 | } |
| 4449 | else |
| 4450 | { |
| 4451 | for (i = 0; i < (unsigned)field->drows; ++i) |
| 4452 | { |
| 4453 | (void)mvwin_wchnstr(field->working, 0, i * field->dcols, |
| 4454 | widevalue + (i * field->dcols), |
| 4455 | field->dcols); |
| 4456 | } |
| 4457 | for (i = 0; i < len; ++i) |
| 4458 | { |
| 4459 | if (CharEq(myZEROS, widevalue[i])) |
| 4460 | { |
| 4461 | while (i < len) |
| 4462 | p[i++] = myBLANK; |
| 4463 | break; |
| 4464 | } |
| 4465 | p[i] = widevalue[i]; |
| 4466 | } |
| 4467 | free(widevalue); |
| 4468 | } |
| 4469 | #else |
| 4470 | for (i = 0; i < len; ++i) |
| 4471 | { |
| 4472 | if (value[i] == '\0') |
| 4473 | { |
| 4474 | while (i < len) |
| 4475 | p[i++] = myBLANK; |
| 4476 | break; |
| 4477 | } |
| 4478 | p[i] = value[i]; |
| 4479 | } |
| 4480 | #endif |
| 4481 | |
| 4482 | if (buffer == 0) |
| 4483 | { |
| 4484 | int syncres; |
| 4485 | |
| 4486 | if (((syncres = Synchronize_Field(field)) != E_OK) && |
| 4487 | (res == E_OK)) |
| 4488 | res = syncres; |
| 4489 | if (((syncres = Synchronize_Linked_Fields(field)) != E_OK) && |
| 4490 | (res == E_OK)) |
| 4491 | res = syncres; |
| 4492 | } |
| 4493 | RETURN(res); |
| 4494 | } |
| 4495 | |
| 4496 | /*--------------------------------------------------------------------------- |
| 4497 | | Facility : libnform |
| 4498 | | Function : char *field_buffer(const FIELD *field,int buffer) |
| 4499 | | |
| 4500 | | Description : Return the address of the buffer for the field. |
| 4501 | | |
| 4502 | | Return Values : Pointer to buffer or NULL if arguments were invalid. |
| 4503 | +--------------------------------------------------------------------------*/ |
| 4504 | NCURSES_EXPORT(char *) |
| 4505 | field_buffer(const FIELD *field, int buffer) |
| 4506 | { |
| 4507 | char *result = 0; |
| 4508 | |
| 4509 | T((T_CALLED("field_buffer(%p,%d)"), (const void *)field, buffer)); |
| 4510 | |
| 4511 | if (field && (buffer >= 0) && (buffer <= field->nbuf)) |
| 4512 | { |
| 4513 | #if USE_WIDEC_SUPPORT |
| 4514 | FIELD_CELL *data = Address_Of_Nth_Buffer(field, buffer); |
| 4515 | unsigned need = 0; |
| 4516 | int size = Buffer_Length(field); |
| 4517 | int n; |
| 4518 | |
| 4519 | /* determine the number of bytes needed to store the expanded string */ |
| 4520 | for (n = 0; n < size; ++n) |
| 4521 | { |
| 4522 | if (!isWidecExt(data[n]) && data[n].chars[0] != L'\0') |
| 4523 | { |
| 4524 | mbstate_t state; |
| 4525 | size_t next; |
| 4526 | |
| 4527 | init_mb(state); |
| 4528 | next = _nc_wcrtomb(0, data[n].chars[0], &state); |
| 4529 | if (!isEILSEQ(next)) |
| 4530 | need += next; |
| 4531 | } |
| 4532 | } |
| 4533 | |
| 4534 | /* allocate a place to store the expanded string */ |
| 4535 | if (field->expanded[buffer] != 0) |
| 4536 | free(field->expanded[buffer]); |
| 4537 | field->expanded[buffer] = typeMalloc(char, need + 1); |
| 4538 | |
| 4539 | /* |
| 4540 | * Expand the multibyte data. |
| 4541 | * |
| 4542 | * It may also be multi-column data. In that case, the data for a row |
| 4543 | * may be null-padded to align to the dcols/drows layout (or it may |
| 4544 | * contain embedded wide-character extensions). Change the null-padding |
| 4545 | * to blanks as needed. |
| 4546 | */ |
| 4547 | if ((result = field->expanded[buffer]) != 0) |
| 4548 | { |
| 4549 | wclear(field->working); |
| 4550 | wmove(field->working, 0, 0); |
| 4551 | for (n = 0; n < size; ++n) |
| 4552 | { |
| 4553 | if (!isWidecExt(data[n]) && data[n].chars[0] != L'\0') |
| 4554 | wadd_wch(field->working, &data[n]); |
| 4555 | } |
| 4556 | wmove(field->working, 0, 0); |
| 4557 | winnstr(field->working, result, (int)need); |
| 4558 | } |
| 4559 | #else |
| 4560 | result = Address_Of_Nth_Buffer(field, buffer); |
| 4561 | #endif |
| 4562 | } |
| 4563 | returnPtr(result); |
| 4564 | } |
| 4565 | |
| 4566 | #if USE_WIDEC_SUPPORT |
| 4567 | |
| 4568 | /*--------------------------------------------------------------------------- |
| 4569 | | Convert a multibyte string to a wide-character string. The result must be |
| 4570 | | freed by the caller. |
| 4571 | +--------------------------------------------------------------------------*/ |
| 4572 | NCURSES_EXPORT(wchar_t *) |
| 4573 | _nc_Widen_String(char *source, int *lengthp) |
| 4574 | { |
| 4575 | wchar_t *result = 0; |
| 4576 | wchar_t wch; |
| 4577 | size_t given = strlen(source); |
| 4578 | size_t tries; |
| 4579 | int pass; |
| 4580 | int status; |
| 4581 | |
| 4582 | #ifndef state_unused |
| 4583 | mbstate_t state; |
| 4584 | #endif |
| 4585 | |
| 4586 | for (pass = 0; pass < 2; ++pass) |
| 4587 | { |
| 4588 | unsigned need = 0; |
| 4589 | size_t passed = 0; |
| 4590 | |
| 4591 | while (passed < given) |
| 4592 | { |
| 4593 | bool found = FALSE; |
| 4594 | |
| 4595 | for (tries = 1, status = 0; tries <= (given - passed); ++tries) |
| 4596 | { |
| 4597 | int save = source[passed + tries]; |
| 4598 | |
| 4599 | source[passed + tries] = 0; |
| 4600 | reset_mbytes(state); |
| 4601 | status = check_mbytes(wch, source + passed, tries, state); |
| 4602 | source[passed + tries] = (char)save; |
| 4603 | |
| 4604 | if (status > 0) |
| 4605 | { |
| 4606 | found = TRUE; |
| 4607 | break; |
| 4608 | } |
| 4609 | } |
| 4610 | if (found) |
| 4611 | { |
| 4612 | if (pass) |
| 4613 | { |
| 4614 | result[need] = wch; |
| 4615 | } |
| 4616 | passed += status; |
| 4617 | ++need; |
| 4618 | } |
| 4619 | else |
| 4620 | { |
| 4621 | if (pass) |
| 4622 | { |
| 4623 | result[need] = source[passed]; |
| 4624 | } |
| 4625 | ++need; |
| 4626 | ++passed; |
| 4627 | } |
| 4628 | } |
| 4629 | |
| 4630 | if (!pass) |
| 4631 | { |
| 4632 | if (!need) |
| 4633 | break; |
| 4634 | result = typeCalloc(wchar_t, need); |
| 4635 | |
| 4636 | *lengthp = need; |
| 4637 | if (result == 0) |
| 4638 | break; |
| 4639 | } |
| 4640 | } |
| 4641 | |
| 4642 | return result; |
| 4643 | } |
| 4644 | #endif |
| 4645 | |
| 4646 | /* frm_driver.c ends here */ |