contrib/ncurses-5.4/c++/cursesf.cc

   1 // * this is for making emacs happy: -*-Mode: C++;-*-
   2 /****************************************************************************
   3  * Copyright (c) 1998-2002,2003 Free Software Foundation, Inc.              *
   4  *                                                                          *
   5  * Permission is hereby granted, free of charge, to any person obtaining a  *
   6  * copy of this software and associated documentation files (the            *
   7  * "Software"), to deal in the Software without restriction, including      *
   8  * without limitation the rights to use, copy, modify, merge, publish,      *
   9  * distribute, distribute with modifications, sublicense, and/or sell       *
  10  * copies of the Software, and to permit persons to whom the Software is    *
  11  * furnished to do so, subject to the following conditions:                 *
  12  *                                                                          *
  13  * The above copyright notice and this permission notice shall be included  *
  14  * in all copies or substantial portions of the Software.                   *
  15  *                                                                          *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
  18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
  19  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
  22  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
  23  *                                                                          *
  24  * Except as contained in this notice, the name(s) of the above copyright   *
  25  * holders shall not be used in advertising or otherwise to promote the     *
  26  * sale, use or other dealings in this Software without prior written       *
  27  * authorization.                                                           *
  28  ****************************************************************************/
  29
  30 /****************************************************************************
  31  *   Author: Juergen Pfeifer, 1997                                          *
  32  ****************************************************************************/
  33
  34 #include "internal.h"
  35 #include "cursesf.h"
  36 #include "cursesapp.h"
  37
  38 MODULE_ID("$Id: cursesf.cc,v 1.16 2003/10/25 15:04:46 tom Exp $")
  39
  40 NCursesFormField::~NCursesFormField () {
  41   if (field)
  42     OnError(::free_field (field));
  43 }
  44
  45 /* Construct a FIELD* array from an array of NCursesFormField
  46  * objects.
  47  */
  48 FIELD**
  49 NCursesForm::mapFields(NCursesFormField* nfields[]) {
  50   int fieldCount = 0,lcv;
  51   FIELD** old_fields;
  52
  53   assert(nfields != 0);
  54
  55   for (lcv=0; nfields[lcv]->field; ++lcv)
  56     ++fieldCount;
  57
  58   FIELD** fields = new FIELD*[fieldCount + 1];
  59
  60   for (lcv=0;nfields[lcv]->field;++lcv) {
  61     fields[lcv] = nfields[lcv]->field;
  62   }
  63   fields[lcv] = NULL;
  64
  65   my_fields = nfields;
  66
  67   if (form && (old_fields = ::form_fields(form))) {
  68     ::set_form_fields(form,(FIELD**)0);
  69     delete[] old_fields;
  70   }
  71   return fields;
  72 }
  73
  74 void NCursesForm::setDefaultAttributes() {
  75   NCursesApplication* S = NCursesApplication::getApplication();
  76
  77   int n = count();
  78   if (n > 0) {
  79     for(int i=0; i<n; i++) {
  80       NCursesFormField* f = (*this)[i];
  81       if ((f->options() & (O_EDIT|O_ACTIVE))==(O_EDIT|O_ACTIVE)) {
  82         if (S) {
  83           f->set_foreground(S->foregrounds());
  84           f->set_background(S->backgrounds());
  85         }
  86         f->set_pad_character('_');
  87       }
  88       else {
  89         if (S)
  90           f->set_background(S->labels());
  91       }
  92     }
  93   }
  94
  95   if (S) {
  96     bkgd(' '|S->dialog_backgrounds());
  97     if (sub)
  98       sub->bkgd(' '|S->dialog_backgrounds());
  99   }
 100 }
 101
 102 void
 103 NCursesForm::InitForm(NCursesFormField* nfields[],
 104                       bool with_frame,
 105                       bool autoDelete_Fields) {
 106   int mrows, mcols;
 107
 108   keypad(TRUE);
 109   meta(TRUE);
 110
 111   b_framed = with_frame;
 112   b_autoDelete = autoDelete_Fields;
 113
 114   form = (FORM*)0;
 115   form = ::new_form(mapFields(nfields));
 116   if (!form)
 117     OnError (E_SYSTEM_ERROR);
 118
 119   UserHook* hook = new UserHook;
 120   hook->m_user   = NULL;
 121   hook->m_back   = this;
 122   hook->m_owner  = form;
 123   ::set_form_userptr(form,(void*)hook);
 124
 125   ::set_form_init  (form, NCursesForm::frm_init);
 126   ::set_form_term  (form, NCursesForm::frm_term);
 127   ::set_field_init (form, NCursesForm::fld_init);
 128   ::set_field_term (form, NCursesForm::fld_term);
 129
 130   scale(mrows, mcols);
 131   ::set_form_win(form, w);
 132
 133   if (with_frame) {
 134     if ((mrows > height()-2) || (mcols > width()-2))
 135       OnError(E_NO_ROOM);
 136     sub = new NCursesWindow(*this,mrows,mcols,1,1,'r');
 137     ::set_form_sub(form, sub->w);
 138     b_sub_owner = TRUE;
 139   }
 140   else {
 141     sub = (NCursesWindow*)0;
 142     b_sub_owner = FALSE;
 143   }
 144   options_on(O_NL_OVERLOAD);
 145   setDefaultAttributes();
 146 }
 147
 148 NCursesForm::~NCursesForm() {
 149   UserHook* hook = (UserHook*)::form_userptr(form);
 150   delete hook;
 151   if (b_sub_owner) {
 152     delete sub;
 153     ::set_form_sub(form,(WINDOW *)0);
 154   }
 155   if (form) {
 156     FIELD** fields = ::form_fields(form);
 157     int cnt = count();
 158
 159     OnError(::set_form_fields(form,(FIELD**)0));
 160
 161     if (b_autoDelete) {
 162       if (cnt>0) {
 163         for (int i=0; i <= cnt; i++)
 164           delete my_fields[i];
 165       }
 166       delete[] my_fields;
 167     }
 168
 169     ::free_form(form);
 170     // It's essential to do this after free_form()
 171     delete[] fields;
 172   }
 173 }
 174
 175 void
 176 NCursesForm::setSubWindow(NCursesWindow& nsub) {
 177   if (!isDescendant(nsub))
 178     OnError(E_SYSTEM_ERROR);
 179   else {
 180     if (b_sub_owner)
 181       delete sub;
 182     sub = &nsub;
 183     ::set_form_sub(form,sub->w);
 184   }
 185 }
 186
 187 /* Internal hook functions. They will route the hook
 188  * calls to virtual methods of the NCursesForm class,
 189  * so in C++ providing a hook is done simply by
 190  * implementing a virtual method in a derived class
 191  */
 192 void
 193 NCursesForm::frm_init(FORM *f) {
 194   getHook(f)->On_Form_Init();
 195 }
 196
 197 void
 198 NCursesForm::frm_term(FORM *f) {
 199   getHook(f)->On_Form_Termination();
 200 }
 201
 202 void
 203 NCursesForm::fld_init(FORM *f) {
 204   NCursesForm* F = getHook(f);
 205   F->On_Field_Init (*(F->current_field ()));
 206 }
 207
 208 void
 209 NCursesForm::fld_term(FORM *f) {
 210   NCursesForm* F = getHook(f);
 211   F->On_Field_Termination (*(F->current_field ()));
 212 }
 213
 214 void
 215 NCursesForm::On_Form_Init() {
 216 }
 217
 218 void
 219 NCursesForm::On_Form_Termination() {
 220 }
 221
 222 void
 223 NCursesForm::On_Field_Init(NCursesFormField& field) {
 224 }
 225
 226 void
 227 NCursesForm::On_Field_Termination(NCursesFormField& field) {
 228 }
 229
 230 // call the form driver and do basic error checking.
 231 int
 232 NCursesForm::driver (int c) {
 233   int res = ::form_driver (form, c);
 234   switch (res) {
 235   case E_OK:
 236   case E_REQUEST_DENIED:
 237   case E_INVALID_FIELD:
 238   case E_UNKNOWN_COMMAND:
 239     break;
 240   default:
 241     OnError (res);
 242   }
 243   return (res);
 244 }
 245
 246 void NCursesForm::On_Request_Denied(int c) const {
 247   ::beep();
 248 }
 249
 250 void NCursesForm::On_Invalid_Field(int c) const {
 251   ::beep();
 252 }
 253
 254 void NCursesForm::On_Unknown_Command(int c) const {
 255   ::beep();
 256 }
 257
 258 static const int CMD_QUIT = MAX_COMMAND + 1;
 259
 260 NCursesFormField*
 261 NCursesForm::operator()(void) {
 262   int drvCmnd;
 263   int err;
 264   int c;
 265
 266   post();
 267   show();
 268   refresh();
 269
 270   while (((drvCmnd = virtualize((c=getKey()))) != CMD_QUIT)) {
 271     switch((err=driver(drvCmnd))) {
 272     case E_REQUEST_DENIED:
 273       On_Request_Denied(c);
 274       break;
 275     case E_INVALID_FIELD:
 276       On_Invalid_Field(c);
 277       break;
 278     case E_UNKNOWN_COMMAND:
 279       On_Unknown_Command(c);
 280       break;
 281     case E_OK:
 282       break;
 283     default:
 284       OnError(err);
 285     }
 286   }
 287
 288   unpost();
 289   hide();
 290   refresh();
 291   return my_fields[::field_index (::current_field (form))];
 292 }
 293
 294 // Provide a default key virtualization. Translate the keyboard
 295 // code c into a form request code.
 296 // The default implementation provides a hopefully straightforward
 297 // mapping for the most common keystrokes and form requests.
 298 int
 299 NCursesForm::virtualize(int c) {
 300   switch(c) {
 301
 302   case KEY_HOME      : return(REQ_FIRST_FIELD);
 303   case KEY_END       : return(REQ_LAST_FIELD);
 304
 305   case KEY_DOWN      : return(REQ_DOWN_CHAR);
 306   case KEY_UP        : return(REQ_UP_CHAR);
 307   case KEY_LEFT      : return(REQ_PREV_CHAR);
 308   case KEY_RIGHT     : return(REQ_NEXT_CHAR);
 309
 310   case KEY_NPAGE     : return(REQ_NEXT_PAGE);
 311   case KEY_PPAGE     : return(REQ_PREV_PAGE);
 312
 313   case KEY_BACKSPACE : return(REQ_DEL_PREV);
 314   case KEY_ENTER     : return(REQ_NEW_LINE);
 315   case KEY_CLEAR     : return(REQ_CLR_FIELD);
 316
 317   case CTRL('X')     : return(CMD_QUIT);        // eXit
 318
 319   case CTRL('F')     : return(REQ_NEXT_FIELD);  // Forward
 320   case CTRL('B')     : return(REQ_PREV_FIELD);  // Backward
 321   case CTRL('L')     : return(REQ_LEFT_FIELD);  // Left
 322   case CTRL('R')     : return(REQ_RIGHT_FIELD); // Right
 323   case CTRL('U')     : return(REQ_UP_FIELD);    // Up
 324   case CTRL('D')     : return(REQ_DOWN_FIELD);  // Down
 325
 326   case CTRL('W')     : return(REQ_NEXT_WORD);
 327   case CTRL('T')     : return(REQ_PREV_WORD);
 328
 329   case CTRL('A')     : return(REQ_BEG_FIELD);
 330   case CTRL('E')     : return(REQ_END_FIELD);
 331
 332   case CTRL('I')     : return(REQ_INS_CHAR);
 333   case CTRL('M')     :
 334   case CTRL('J')     : return(REQ_NEW_LINE);
 335   case CTRL('O')     : return(REQ_INS_LINE);
 336   case CTRL('V')     : return(REQ_DEL_CHAR);
 337   case CTRL('H')     : return(REQ_DEL_PREV);
 338   case CTRL('Y')     : return(REQ_DEL_LINE);
 339   case CTRL('G')     : return(REQ_DEL_WORD);
 340   case CTRL('K')     : return(REQ_CLR_EOF);
 341
 342   case CTRL('N')     : return(REQ_NEXT_CHOICE);
 343   case CTRL('P')     : return(REQ_PREV_CHOICE);
 344
 345   default:
 346     return(c);
 347   }
 348 }
 349 //
 350 // -------------------------------------------------------------------------
 351 // User Defined Fieldtypes
 352 // -------------------------------------------------------------------------
 353 //
 354 bool UserDefinedFieldType::fcheck(FIELD *f, const void *u) {
 355   NCursesFormField* F = (NCursesFormField*)u;
 356   assert(F != 0);
 357   UserDefinedFieldType* udf = (UserDefinedFieldType*)(F->fieldtype());
 358   assert(udf != 0);
 359   return udf->field_check(*F);
 360 }
 361
 362 bool UserDefinedFieldType::ccheck(int c, const void *u) {
 363   NCursesFormField* F = (NCursesFormField*)u;
 364   assert(F != 0);
 365   UserDefinedFieldType* udf =
 366     (UserDefinedFieldType*)(F->fieldtype());
 367   assert(udf != 0);
 368   return udf->char_check(c);
 369 }
 370
 371 void* UserDefinedFieldType::makearg(va_list* va) {
 372   return va_arg(*va,NCursesFormField*);
 373 }
 374
 375 FIELDTYPE* UserDefinedFieldType::generic_fieldtype =
 376   ::new_fieldtype(UserDefinedFieldType::fcheck,
 377                   UserDefinedFieldType::ccheck);
 378
 379 FIELDTYPE* UserDefinedFieldType_With_Choice::generic_fieldtype_with_choice =
 380   ::new_fieldtype(UserDefinedFieldType::fcheck,
 381                   UserDefinedFieldType::ccheck);
 382
 383 bool UserDefinedFieldType_With_Choice::next_choice(FIELD *f, const void *u) {
 384   NCursesFormField* F = (NCursesFormField*)u;
 385   assert(F != 0);
 386   UserDefinedFieldType_With_Choice* udf =
 387     (UserDefinedFieldType_With_Choice*)(F->fieldtype());
 388   assert(udf != 0);
 389   return udf->next(*F);
 390 }
 391
 392 bool UserDefinedFieldType_With_Choice::prev_choice(FIELD *f, const void *u) {
 393   NCursesFormField* F = (NCursesFormField*)u;
 394   assert(F != 0);
 395   UserDefinedFieldType_With_Choice* udf =
 396     (UserDefinedFieldType_With_Choice*)(F->fieldtype());
 397   assert(udf != 0);
 398   return udf->previous(*F);
 399 }
 400
 401 class UDF_Init {
 402 private:
 403   int code;
 404   static UDF_Init* I;
 405 public:
 406   UDF_Init() {
 407     code = ::set_fieldtype_arg(UserDefinedFieldType::generic_fieldtype,
 408                                UserDefinedFieldType::makearg,
 409                                NULL,
 410                                NULL);
 411     if (code==E_OK)
 412       code = ::set_fieldtype_arg
 413         (UserDefinedFieldType_With_Choice::generic_fieldtype_with_choice,
 414          UserDefinedFieldType::makearg,
 415          NULL,
 416          NULL);
 417     if (code==E_OK)
 418       code = ::set_fieldtype_choice
 419         (UserDefinedFieldType_With_Choice::generic_fieldtype_with_choice,
 420          UserDefinedFieldType_With_Choice::next_choice,
 421          UserDefinedFieldType_With_Choice::prev_choice);
 422   }
 423 };
 424
 425 UDF_Init* UDF_Init::I = new UDF_Init();
 426