release/src/router/libncurses/c++/cursesf.cc

   1 // * this is for making emacs happy: -*-Mode: C++;-*-
   2 /****************************************************************************
   3  * Copyright (c) 1998-2005,2011 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 1.22 2011/09/17 22:12:10 tom Exp $")
  39
  40 NCursesFormField::~NCursesFormField ()
  41 {
  42   if (field)
  43     OnError(::free_field (field));
  44 }
  45
  46 /* Construct a FIELD* array from an array of NCursesFormField
  47  * objects.
  48  */
  49 FIELD**
  50 NCursesForm::mapFields(NCursesFormField* nfields[])
  51 {
  52   int fieldCount = 0,lcv;
  53   FIELD** old_fields;
  54
  55   assert(nfields != 0);
  56
  57   for (lcv=0; nfields[lcv]->field; ++lcv)
  58     ++fieldCount;
  59
  60   FIELD** fields = new FIELD*[fieldCount + 1];
  61
  62   for (lcv=0;nfields[lcv]->field;++lcv) {
  63     fields[lcv] = nfields[lcv]->field;
  64   }
  65   fields[lcv] = NULL;
  66
  67   my_fields = nfields;
  68
  69   if (form && (old_fields = ::form_fields(form))) {
  70     ::set_form_fields(form, static_cast<FIELD**>(0));
  71     delete[] old_fields;
  72   }
  73   return fields;
  74 }
  75
  76 void NCursesForm::setDefaultAttributes()
  77 {
  78   NCursesApplication* S = NCursesApplication::getApplication();
  79
  80   int n = count();
  81   if (n > 0) {
  82     for(int i=0; i<n; i++) {
  83       NCursesFormField* f = (*this)[i];
  84       if ((f->options() & (O_EDIT|O_ACTIVE))==(O_EDIT|O_ACTIVE)) {
  85         if (S) {
  86           f->set_foreground(S->foregrounds());
  87           f->set_background(S->backgrounds());
  88         }
  89         f->set_pad_character('_');
  90       }
  91       else {
  92         if (S)
  93           f->set_background(S->labels());
  94       }
  95     }
  96   }
  97
  98   if (S) {
  99     bkgd(' '|S->dialog_backgrounds());
 100     if (sub)
 101       sub->bkgd(' '|S->dialog_backgrounds());
 102   }
 103 }
 104
 105 void
 106 NCursesForm::InitForm(NCursesFormField* nfields[],
 107                       bool with_frame,
 108                       bool autoDelete_Fields)
 109 {
 110   int mrows, mcols;
 111
 112   keypad(TRUE);
 113   meta(TRUE);
 114
 115   b_framed = with_frame;
 116   b_autoDelete = autoDelete_Fields;
 117
 118   form = static_cast<FORM*>(0);
 119   form = ::new_form(mapFields(nfields));
 120   if (!form)
 121     OnError (E_SYSTEM_ERROR);
 122
 123   UserHook* hook = new UserHook;
 124   hook->m_user   = NULL;
 125   hook->m_back   = this;
 126   hook->m_owner  = form;
 127   ::set_form_userptr(form, reinterpret_cast<void*>(hook));
 128
 129   ::set_form_init  (form, _nc_xx_frm_init);
 130   ::set_form_term  (form, _nc_xx_frm_term);
 131   ::set_field_init (form, _nc_xx_fld_init);
 132   ::set_field_term (form, _nc_xx_fld_term);
 133
 134   scale(mrows, mcols);
 135   ::set_form_win(form, w);
 136
 137   if (with_frame) {
 138     if ((mrows > height()-2) || (mcols > width()-2))
 139       OnError(E_NO_ROOM);
 140     sub = new NCursesWindow(*this,mrows,mcols,1,1,'r');
 141     ::set_form_sub(form, sub->w);
 142     b_sub_owner = TRUE;
 143   }
 144   else {
 145     sub = static_cast<NCursesWindow*>(0);
 146     b_sub_owner = FALSE;
 147   }
 148   options_on(O_NL_OVERLOAD);
 149   setDefaultAttributes();
 150 }
 151
 152 NCursesForm::~NCursesForm()
 153 {
 154   UserHook* hook = reinterpret_cast<UserHook*>(::form_userptr(form));
 155   delete hook;
 156   if (b_sub_owner) {
 157     delete sub;
 158     ::set_form_sub(form, static_cast<WINDOW *>(0));
 159   }
 160   if (form) {
 161     FIELD** fields = ::form_fields(form);
 162     int cnt = count();
 163
 164     OnError(::set_form_fields(form, static_cast<FIELD**>(0)));
 165
 166     if (b_autoDelete) {
 167       if (cnt>0) {
 168         for (int i=0; i <= cnt; i++)
 169           delete my_fields[i];
 170       }
 171       delete[] my_fields;
 172     }
 173
 174     ::free_form(form);
 175     // It's essential to do this after free_form()
 176     delete[] fields;
 177   }
 178 }
 179
 180 void
 181 NCursesForm::setSubWindow(NCursesWindow& nsub)
 182 {
 183   if (!isDescendant(nsub))
 184     OnError(E_SYSTEM_ERROR);
 185   else {
 186     if (b_sub_owner)
 187       delete sub;
 188     sub = &nsub;
 189     ::set_form_sub(form,sub->w);
 190   }
 191 }
 192
 193 /* Internal hook functions. They will route the hook
 194  * calls to virtual methods of the NCursesForm class,
 195  * so in C++ providing a hook is done simply by
 196  * implementing a virtual method in a derived class
 197  */
 198 void
 199 _nc_xx_frm_init(FORM *f)
 200 {
 201   NCursesForm::getHook(f)->On_Form_Init();
 202 }
 203
 204 void
 205 _nc_xx_frm_term(FORM *f)
 206 {
 207   NCursesForm::getHook(f)->On_Form_Termination();
 208 }
 209
 210 void
 211 _nc_xx_fld_init(FORM *f)
 212 {
 213   NCursesForm* F = NCursesForm::getHook(f);
 214   F->On_Field_Init (*(F->current_field ()));
 215 }
 216
 217 void
 218 _nc_xx_fld_term(FORM *f)
 219 {
 220   NCursesForm* F = NCursesForm::getHook(f);
 221   F->On_Field_Termination (*(F->current_field ()));
 222 }
 223
 224 void
 225 NCursesForm::On_Form_Init()
 226 {
 227 }
 228
 229 void
 230 NCursesForm::On_Form_Termination()
 231 {
 232 }
 233
 234 void
 235 NCursesForm::On_Field_Init(NCursesFormField& field)
 236 {
 237   (void) field;
 238 }
 239
 240 void
 241 NCursesForm::On_Field_Termination(NCursesFormField& field)
 242 {
 243   (void) field;
 244 }
 245
 246 // call the form driver and do basic error checking.
 247 int
 248 NCursesForm::driver (int c)
 249 {
 250   int res = ::form_driver (form, c);
 251   switch (res) {
 252   case E_OK:
 253   case E_REQUEST_DENIED:
 254   case E_INVALID_FIELD:
 255   case E_UNKNOWN_COMMAND:
 256     break;
 257   default:
 258     OnError (res);
 259   }
 260   return (res);
 261 }
 262
 263 void NCursesForm::On_Request_Denied(int c) const
 264 {
 265   (void) c;
 266   ::beep();
 267 }
 268
 269 void NCursesForm::On_Invalid_Field(int c) const
 270 {
 271   (void) c;
 272   ::beep();
 273 }
 274
 275 void NCursesForm::On_Unknown_Command(int c) const
 276 {
 277   (void) c;
 278   ::beep();
 279 }
 280
 281 static const int CMD_QUIT = MAX_COMMAND + 1;
 282
 283 NCursesFormField*
 284 NCursesForm::operator()(void)
 285 {
 286   int drvCmnd;
 287   int err;
 288   int c;
 289
 290   post();
 291   show();
 292   refresh();
 293
 294   while (((drvCmnd = virtualize((c=getKey()))) != CMD_QUIT)) {
 295     switch((err=driver(drvCmnd))) {
 296     case E_REQUEST_DENIED:
 297       On_Request_Denied(c);
 298       break;
 299     case E_INVALID_FIELD:
 300       On_Invalid_Field(c);
 301       break;
 302     case E_UNKNOWN_COMMAND:
 303       On_Unknown_Command(c);
 304       break;
 305     case E_OK:
 306       break;
 307     default:
 308       OnError(err);
 309     }
 310   }
 311
 312   unpost();
 313   hide();
 314   refresh();
 315   return my_fields[::field_index (::current_field (form))];
 316 }
 317
 318 // Provide a default key virtualization. Translate the keyboard
 319 // code c into a form request code.
 320 // The default implementation provides a hopefully straightforward
 321 // mapping for the most common keystrokes and form requests.
 322 int
 323 NCursesForm::virtualize(int c)
 324 {
 325   switch(c) {
 326
 327   case KEY_HOME      : return(REQ_FIRST_FIELD);
 328   case KEY_END       : return(REQ_LAST_FIELD);
 329
 330   case KEY_DOWN      : return(REQ_DOWN_CHAR);
 331   case KEY_UP        : return(REQ_UP_CHAR);
 332   case KEY_LEFT      : return(REQ_PREV_CHAR);
 333   case KEY_RIGHT     : return(REQ_NEXT_CHAR);
 334
 335   case KEY_NPAGE     : return(REQ_NEXT_PAGE);
 336   case KEY_PPAGE     : return(REQ_PREV_PAGE);
 337
 338   case KEY_BACKSPACE : return(REQ_DEL_PREV);
 339   case KEY_ENTER     : return(REQ_NEW_LINE);
 340   case KEY_CLEAR     : return(REQ_CLR_FIELD);
 341
 342   case CTRL('X')     : return(CMD_QUIT);        // eXit
 343
 344   case CTRL('F')     : return(REQ_NEXT_FIELD);  // Forward
 345   case CTRL('B')     : return(REQ_PREV_FIELD);  // Backward
 346   case CTRL('L')     : return(REQ_LEFT_FIELD);  // Left
 347   case CTRL('R')     : return(REQ_RIGHT_FIELD); // Right
 348   case CTRL('U')     : return(REQ_UP_FIELD);    // Up
 349   case CTRL('D')     : return(REQ_DOWN_FIELD);  // Down
 350
 351   case CTRL('W')     : return(REQ_NEXT_WORD);
 352   case CTRL('T')     : return(REQ_PREV_WORD);
 353
 354   case CTRL('A')     : return(REQ_BEG_FIELD);
 355   case CTRL('E')     : return(REQ_END_FIELD);
 356
 357   case CTRL('I')     : return(REQ_INS_CHAR);
 358   case CTRL('M')     :
 359   case CTRL('J')     : return(REQ_NEW_LINE);
 360   case CTRL('O')     : return(REQ_INS_LINE);
 361   case CTRL('V')     : return(REQ_DEL_CHAR);
 362   case CTRL('H')     : return(REQ_DEL_PREV);
 363   case CTRL('Y')     : return(REQ_DEL_LINE);
 364   case CTRL('G')     : return(REQ_DEL_WORD);
 365   case CTRL('K')     : return(REQ_CLR_EOF);
 366
 367   case CTRL('N')     : return(REQ_NEXT_CHOICE);
 368   case CTRL('P')     : return(REQ_PREV_CHOICE);
 369
 370   default:
 371     return(c);
 372   }
 373 }
 374 //
 375 // -------------------------------------------------------------------------
 376 // User Defined Fieldtypes
 377 // -------------------------------------------------------------------------
 378 //
 379 bool _nc_xx_fld_fcheck(FIELD *f, const void *u)
 380 {
 381   (void) f;
 382   NCursesFormField* F = reinterpret_cast<NCursesFormField*>(const_cast<void *>(u));
 383   assert(F != 0);
 384   UserDefinedFieldType* udf = reinterpret_cast<UserDefinedFieldType*>(F->fieldtype());
 385   assert(udf != 0);
 386   return udf->field_check(*F);
 387 }
 388
 389 bool _nc_xx_fld_ccheck(int c, const void *u)
 390 {
 391   NCursesFormField* F = reinterpret_cast<NCursesFormField*>(const_cast<void *>(u));
 392   assert(F != 0);
 393   UserDefinedFieldType* udf =
 394     reinterpret_cast<UserDefinedFieldType*>(F->fieldtype());
 395   assert(udf != 0);
 396   return udf->char_check(c);
 397 }
 398
 399 void* _nc_xx_fld_makearg(va_list* va)
 400 {
 401   return va_arg(*va,NCursesFormField*);
 402 }
 403
 404 FIELDTYPE* UserDefinedFieldType::generic_fieldtype =
 405   ::new_fieldtype(_nc_xx_fld_fcheck,
 406                   _nc_xx_fld_ccheck);
 407
 408 FIELDTYPE* UserDefinedFieldType_With_Choice::generic_fieldtype_with_choice =
 409   ::new_fieldtype(_nc_xx_fld_fcheck,
 410                   _nc_xx_fld_ccheck);
 411
 412 bool _nc_xx_next_choice(FIELD *f, const void *u)
 413 {
 414   (void) f;
 415   NCursesFormField* F = reinterpret_cast<NCursesFormField*>(const_cast<void *>(u));
 416   assert(F != 0);
 417   UserDefinedFieldType_With_Choice* udf =
 418     reinterpret_cast<UserDefinedFieldType_With_Choice*>(F->fieldtype());
 419   assert(udf != 0);
 420   return udf->next(*F);
 421 }
 422
 423 bool _nc_xx_prev_choice(FIELD *f, const void *u)
 424 {
 425   (void) f;
 426   NCursesFormField* F = reinterpret_cast<NCursesFormField*>(const_cast<void *>(u));
 427   assert(F != 0);
 428   UserDefinedFieldType_With_Choice* udf =
 429     reinterpret_cast<UserDefinedFieldType_With_Choice*>(F->fieldtype());
 430   assert(udf != 0);
 431   return udf->previous(*F);
 432 }
 433
 434 class UDF_Init
 435 {
 436 private:
 437   int code;
 438   static UDF_Init* I;
 439
 440 public:
 441   UDF_Init()
 442     : code(0)
 443   {
 444     code = ::set_fieldtype_arg(UserDefinedFieldType::generic_fieldtype,
 445                                _nc_xx_fld_makearg,
 446                                NULL,
 447                                NULL);
 448     if (code==E_OK)
 449       code = ::set_fieldtype_arg
 450         (UserDefinedFieldType_With_Choice::generic_fieldtype_with_choice,
 451          _nc_xx_fld_makearg,
 452          NULL,
 453          NULL);
 454     if (code==E_OK)
 455       code = ::set_fieldtype_choice
 456         (UserDefinedFieldType_With_Choice::generic_fieldtype_with_choice,
 457          _nc_xx_next_choice,
 458          _nc_xx_prev_choice);
 459   }
 460 };
 461
 462 UDF_Init* UDF_Init::I = new UDF_Init();