src/msw/ole/automtn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        automtn.cpp
   3 // Purpose:     OLE automation utilities
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     11/6/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998, Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  13 #pragma implementation "automtn.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #if defined(__BORLANDC__)
  20 #pragma hdrstop
  21 #endif
  22
  23 #include "wx/defs.h"
  24
  25 // Watcom C++ gives a linker error if this is compiled in.
  26 // With Borland C++, all samples crash if this is compiled in.
  27 #if wxUSE_OLE && !(defined(__BORLANDC__) && (__BORLANDC__ < 0x520)) && !defined(__CYGWIN10__)
  28
  29 #define _FORCENAMELESSUNION
  30 #include "wx/log.h"
  31 #include "wx/msw/private.h"
  32 #include "wx/msw/ole/oleutils.h"
  33 #include "wx/msw/ole/automtn.h"
  34
  35 #include <math.h>
  36
  37 #ifdef __WXWINCE__
  38 #include "wx/msw/wince/time.h"
  39 #else
  40 #include <time.h>
  41 #endif
  42
  43 #include <wtypes.h>
  44 #include <unknwn.h>
  45
  46 #include <ole2.h>
  47 #define _huge
  48
  49 #ifndef __WXWINCE__
  50 #include <ole2ver.h>
  51 #endif
  52
  53 #include <oleauto.h>
  54
  55 // Verifies will fail if the needed buffer size is too large
  56 #define MAX_TIME_BUFFER_SIZE    128         // matches that in timecore.cpp
  57 #define MIN_DATE                (-657434L)  // about year 100
  58 #define MAX_DATE                2958465L    // about year 9999
  59
  60 // Half a second, expressed in days
  61 #define HALF_SECOND  (1.0/172800.0)
  62
  63 // One-based array of days in year at month start
  64 static int rgMonthDays[13] =
  65         {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365};
  66
  67 #if wxUSE_DATETIME
  68 #include "wx/datetime.h"
  69
  70 static BOOL OleDateFromTm(WORD wYear, WORD wMonth, WORD wDay,
  71         WORD wHour, WORD wMinute, WORD wSecond, DATE& dtDest);
  72 static BOOL TmFromOleDate(DATE dtSrc, struct tm& tmDest);
  73 #endif // wxUSE_TIMEDATE
  74
  75 static void ClearVariant(VARIANTARG *pvarg) ;
  76 static void ReleaseVariant(VARIANTARG *pvarg) ;
  77 // static void ShowException(LPOLESTR szMember, HRESULT hr, EXCEPINFO *pexcep, unsigned int uiArgErr);
  78
  79 /*
  80  * wxAutomationObject
  81  */
  82
  83 wxAutomationObject::wxAutomationObject(WXIDISPATCH* dispatchPtr)
  84 {
  85         m_dispatchPtr = dispatchPtr;
  86 }
  87
  88 wxAutomationObject::~wxAutomationObject()
  89 {
  90         if (m_dispatchPtr)
  91         {
  92                 ((IDispatch*)m_dispatchPtr)->Release();
  93                 m_dispatchPtr = NULL;
  94         }
  95 }
  96
  97 #define INVOKEARG(i) (args ? args[i] : *(ptrArgs[i]))
  98
  99 // For Put/Get, no named arguments are allowed.
 100 bool wxAutomationObject::Invoke(const wxString& member, int action,
 101         wxVariant& retValue, int noArgs, wxVariant args[], const wxVariant* ptrArgs[]) const
 102 {
 103         if (!m_dispatchPtr)
 104                 return FALSE;
 105
 106         // nonConstMember is necessary because the wxString class doesn't have enough consts...
 107         wxString nonConstMember(member);
 108
 109         int ch = nonConstMember.Find('.');
 110         if (ch != -1)
 111         {
 112                 // Use dot notation to get the next object
 113                 wxString member2(nonConstMember.Left((size_t) ch));
 114                 wxString rest(nonConstMember.Right(nonConstMember.Length() - ch - 1));
 115                 wxAutomationObject obj;
 116                 if (!GetObject(obj, member2))
 117                         return FALSE;
 118                 return obj.Invoke(rest, action, retValue, noArgs, args, ptrArgs);
 119         }
 120
 121         VARIANTARG vReturn;
 122         ClearVariant(& vReturn);
 123
 124         VARIANTARG* vReturnPtr = & vReturn;
 125
 126         // Find number of names args
 127         int namedArgCount = 0;
 128         int i;
 129         for (i = 0; i < noArgs; i++)
 130                 if (!INVOKEARG(i).GetName().IsNull())
 131                 {
 132                         namedArgCount ++;
 133                 }
 134
 135         int namedArgStringCount = namedArgCount + 1;
 136         BSTR* argNames = new BSTR[namedArgStringCount];
 137         argNames[0] = wxConvertStringToOle(member);
 138
 139         // Note that arguments are specified in reverse order
 140         // (all totally logical; hey, we're dealing with OLE here.)
 141
 142         int j = 0;
 143         for (i = 0; i < namedArgCount; i++)
 144         {
 145                 if (!INVOKEARG(i).GetName().IsNull())
 146                 {
 147                         argNames[(namedArgCount-j)] = wxConvertStringToOle(INVOKEARG(i).GetName());
 148                         j ++;
 149                 }
 150         }
 151
 152         // + 1 for the member name, + 1 again in case we're a 'put'
 153         DISPID* dispIds = new DISPID[namedArgCount + 2];
 154
 155         HRESULT hr;
 156         DISPPARAMS dispparams;
 157         unsigned int uiArgErr;
 158         EXCEPINFO excep;
 159
 160         // Get the IDs for the member and its arguments.  GetIDsOfNames expects the
 161         // member name as the first name, followed by argument names (if any).
 162         hr = ((IDispatch*)m_dispatchPtr)->GetIDsOfNames(IID_NULL, argNames,
 163                                                                 1 + namedArgCount, LOCALE_SYSTEM_DEFAULT, dispIds);
 164         if (FAILED(hr))
 165         {
 166 //              ShowException(szMember, hr, NULL, 0);
 167             delete[] argNames;
 168             delete[] dispIds;
 169                 return FALSE;
 170         }
 171
 172         // if doing a property put(ref), we need to adjust the first argument to have a
 173         // named arg of DISPID_PROPERTYPUT.
 174         if (action & (DISPATCH_PROPERTYPUT | DISPATCH_PROPERTYPUTREF))
 175         {
 176                 namedArgCount = 1;
 177                 dispIds[1] = DISPID_PROPERTYPUT;
 178                 vReturnPtr = (VARIANTARG*) NULL;
 179         }
 180
 181         // Convert the wxVariants to VARIANTARGs
 182         VARIANTARG* oleArgs = new VARIANTARG[noArgs];
 183         for (i = 0; i < noArgs; i++)
 184         {
 185                 // Again, reverse args
 186                 if (!wxConvertVariantToOle(INVOKEARG((noArgs-1) - i), oleArgs[i]))
 187         {
 188                 delete[] argNames;
 189                 delete[] dispIds;
 190             delete[] oleArgs;
 191                         return FALSE;
 192         }
 193         }
 194
 195         dispparams.rgdispidNamedArgs = dispIds + 1;
 196         dispparams.rgvarg = oleArgs;
 197         dispparams.cArgs = noArgs;
 198         dispparams.cNamedArgs = namedArgCount;
 199
 200         excep.pfnDeferredFillIn = NULL;
 201
 202         hr = ((IDispatch*)m_dispatchPtr)->Invoke(dispIds[0], IID_NULL, LOCALE_SYSTEM_DEFAULT,
 203                                                 action, &dispparams, vReturnPtr, &excep, &uiArgErr);
 204
 205         for (i = 0; i < namedArgStringCount; i++)
 206         {
 207                 SysFreeString(argNames[i]);
 208         }
 209         delete[] argNames;
 210         delete[] dispIds;
 211
 212         for (i = 0; i < noArgs; i++)
 213                 ReleaseVariant(& oleArgs[i]) ;
 214         delete[] oleArgs;
 215
 216         if (FAILED(hr))
 217         {
 218                 // display the exception information if appropriate:
 219 //              ShowException((const char*) member, hr, &excep, uiArgErr);
 220
 221                 // free exception structure information
 222                 SysFreeString(excep.bstrSource);
 223                 SysFreeString(excep.bstrDescription);
 224                 SysFreeString(excep.bstrHelpFile);
 225
 226                 if (vReturnPtr)
 227                         ReleaseVariant(vReturnPtr);
 228                 return FALSE;
 229         }
 230         else
 231         {
 232                 if (vReturnPtr)
 233                 {
 234                         // Convert result to wxVariant form
 235                         wxConvertOleToVariant(vReturn, retValue);
 236                         // Mustn't release the dispatch pointer
 237                         if (vReturn.vt == VT_DISPATCH)
 238                         {
 239                                 vReturn.pdispVal = (IDispatch*) NULL;
 240                         }
 241                         ReleaseVariant(& vReturn);
 242                 }
 243         }
 244         return TRUE;
 245 }
 246
 247 // Invoke a member function
 248 wxVariant wxAutomationObject::CallMethod(const wxString& member, int noArgs, wxVariant args[])
 249 {
 250         wxVariant retVariant;
 251         if (!Invoke(member, DISPATCH_METHOD, retVariant, noArgs, args))
 252         {
 253                 retVariant.MakeNull();
 254         }
 255         return retVariant;
 256 }
 257
 258 wxVariant wxAutomationObject::CallMethodArray(const wxString& member, int noArgs, const wxVariant **args)
 259 {
 260         wxVariant retVariant;
 261         if (!Invoke(member, DISPATCH_METHOD, retVariant, noArgs, NULL, args))
 262         {
 263                 retVariant.MakeNull();
 264         }
 265         return retVariant;
 266 }
 267
 268 wxVariant wxAutomationObject::CallMethod(const wxString& member,
 269                 const wxVariant& arg1, const wxVariant& arg2,
 270                 const wxVariant& arg3, const wxVariant& arg4,
 271                 const wxVariant& arg5, const wxVariant& arg6)
 272 {
 273         const wxVariant** args = new const wxVariant*[6];
 274         int i = 0;
 275         if (!arg1.IsNull())
 276         {
 277                 args[i] = & arg1;
 278                 i ++;
 279         }
 280         if (!arg2.IsNull())
 281         {
 282                 args[i] = & arg2;
 283                 i ++;
 284         }
 285         if (!arg3.IsNull())
 286         {
 287                 args[i] = & arg3;
 288                 i ++;
 289         }
 290         if (!arg4.IsNull())
 291         {
 292                 args[i] = & arg4;
 293                 i ++;
 294         }
 295         if (!arg5.IsNull())
 296         {
 297                 args[i] = & arg5;
 298                 i ++;
 299         }
 300         if (!arg6.IsNull())
 301         {
 302                 args[i] = & arg6;
 303                 i ++;
 304         }
 305         wxVariant retVariant;
 306         if (!Invoke(member, DISPATCH_METHOD, retVariant, i, NULL, args))
 307         {
 308                 retVariant.MakeNull();
 309         }
 310         delete[] args;
 311         return retVariant;
 312 }
 313
 314 // Get/Set property
 315 wxVariant wxAutomationObject::GetPropertyArray(const wxString& property, int noArgs, const wxVariant **args) const
 316 {
 317         wxVariant retVariant;
 318         if (!Invoke(property, DISPATCH_PROPERTYGET, retVariant, noArgs, NULL, args))
 319         {
 320                 retVariant.MakeNull();
 321         }
 322         return retVariant;
 323 }
 324 wxVariant wxAutomationObject::GetProperty(const wxString& property, int noArgs, wxVariant args[]) const
 325 {
 326         wxVariant retVariant;
 327         if (!Invoke(property, DISPATCH_PROPERTYGET, retVariant, noArgs, args))
 328         {
 329                 retVariant.MakeNull();
 330         }
 331         return retVariant;
 332 }
 333
 334 wxVariant wxAutomationObject::GetProperty(const wxString& property,
 335                 const wxVariant& arg1, const wxVariant& arg2,
 336                 const wxVariant& arg3, const wxVariant& arg4,
 337                 const wxVariant& arg5, const wxVariant& arg6)
 338 {
 339         const wxVariant** args = new const wxVariant*[6];
 340         int i = 0;
 341         if (!arg1.IsNull())
 342         {
 343                 args[i] = & arg1;
 344                 i ++;
 345         }
 346         if (!arg2.IsNull())
 347         {
 348                 args[i] = & arg2;
 349                 i ++;
 350         }
 351         if (!arg3.IsNull())
 352         {
 353                 args[i] = & arg3;
 354                 i ++;
 355         }
 356         if (!arg4.IsNull())
 357         {
 358                 args[i] = & arg4;
 359                 i ++;
 360         }
 361         if (!arg5.IsNull())
 362         {
 363                 args[i] = & arg5;
 364                 i ++;
 365         }
 366         if (!arg6.IsNull())
 367         {
 368                 args[i] = & arg6;
 369                 i ++;
 370         }
 371         wxVariant retVariant;
 372         if (!Invoke(property, DISPATCH_PROPERTYGET, retVariant, i, NULL, args))
 373         {
 374                 retVariant.MakeNull();
 375         }
 376         delete[] args;
 377         return retVariant;
 378 }
 379
 380 bool wxAutomationObject::PutProperty(const wxString& property, int noArgs, wxVariant args[])
 381 {
 382         wxVariant retVariant;
 383         if (!Invoke(property, DISPATCH_PROPERTYPUT, retVariant, noArgs, args))
 384         {
 385                 return FALSE;
 386         }
 387         return TRUE;
 388 }
 389
 390 bool wxAutomationObject::PutPropertyArray(const wxString& property, int noArgs, const wxVariant **args)
 391 {
 392         wxVariant retVariant;
 393         if (!Invoke(property, DISPATCH_PROPERTYPUT, retVariant, noArgs, NULL, args))
 394         {
 395                 return FALSE;
 396         }
 397         return TRUE;
 398 }
 399
 400 bool wxAutomationObject::PutProperty(const wxString& property,
 401                 const wxVariant& arg1, const wxVariant& arg2,
 402                 const wxVariant& arg3, const wxVariant& arg4,
 403                 const wxVariant& arg5, const wxVariant& arg6)
 404 {
 405         const wxVariant** args = new const wxVariant*[6];
 406         int i = 0;
 407         if (!arg1.IsNull())
 408         {
 409                 args[i] = & arg1;
 410                 i ++;
 411         }
 412         if (!arg2.IsNull())
 413         {
 414                 args[i] = & arg2;
 415                 i ++;
 416         }
 417         if (!arg3.IsNull())
 418         {
 419                 args[i] = & arg3;
 420                 i ++;
 421         }
 422         if (!arg4.IsNull())
 423         {
 424                 args[i] = & arg4;
 425                 i ++;
 426         }
 427         if (!arg5.IsNull())
 428         {
 429                 args[i] = & arg5;
 430                 i ++;
 431         }
 432         if (!arg6.IsNull())
 433         {
 434                 args[i] = & arg6;
 435                 i ++;
 436         }
 437         wxVariant retVariant;
 438         bool ret = Invoke(property, DISPATCH_PROPERTYPUT, retVariant, i, NULL, args);
 439         delete[] args;
 440         return ret;
 441 }
 442
 443
 444 // Uses DISPATCH_PROPERTYGET
 445 // and returns a dispatch pointer. The calling code should call Release
 446 // on the pointer, though this could be implicit by constructing an wxAutomationObject
 447 // with it and letting the destructor call Release.
 448 WXIDISPATCH* wxAutomationObject::GetDispatchProperty(const wxString& property, int noArgs, wxVariant args[]) const
 449 {
 450         wxVariant retVariant;
 451         if (Invoke(property, DISPATCH_PROPERTYGET, retVariant, noArgs, args))
 452         {
 453                 if (retVariant.GetType() == wxT("void*"))
 454                 {
 455                         return (WXIDISPATCH*) retVariant.GetVoidPtr();
 456                 }
 457         }
 458
 459         return (WXIDISPATCH*) NULL;
 460 }
 461
 462 // Uses DISPATCH_PROPERTYGET
 463 // and returns a dispatch pointer. The calling code should call Release
 464 // on the pointer, though this could be implicit by constructing an wxAutomationObject
 465 // with it and letting the destructor call Release.
 466 WXIDISPATCH* wxAutomationObject::GetDispatchProperty(const wxString& property, int noArgs, const wxVariant **args) const
 467 {
 468         wxVariant retVariant;
 469         if (Invoke(property, DISPATCH_PROPERTYGET, retVariant, noArgs, NULL, args))
 470         {
 471                 if (retVariant.GetType() == wxT("void*"))
 472                 {
 473                         return (WXIDISPATCH*) retVariant.GetVoidPtr();
 474                 }
 475         }
 476
 477         return (WXIDISPATCH*) NULL;
 478 }
 479
 480
 481 // A way of initialising another wxAutomationObject with a dispatch object
 482 bool wxAutomationObject::GetObject(wxAutomationObject& obj, const wxString& property, int noArgs, wxVariant args[]) const
 483 {
 484         WXIDISPATCH* dispatch = GetDispatchProperty(property, noArgs, args);
 485         if (dispatch)
 486         {
 487                 obj.SetDispatchPtr(dispatch);
 488                 return TRUE;
 489         }
 490         else
 491                 return FALSE;
 492 }
 493
 494 // A way of initialising another wxAutomationObject with a dispatch object
 495 bool wxAutomationObject::GetObject(wxAutomationObject& obj, const wxString& property, int noArgs, const wxVariant **args) const
 496 {
 497         WXIDISPATCH* dispatch = GetDispatchProperty(property, noArgs, args);
 498         if (dispatch)
 499         {
 500                 obj.SetDispatchPtr(dispatch);
 501                 return TRUE;
 502         }
 503         else
 504                 return FALSE;
 505 }
 506
 507 // Get a dispatch pointer from the current object associated
 508 // with a class id
 509 bool wxAutomationObject::GetInstance(const wxString& classId) const
 510 {
 511         if (m_dispatchPtr)
 512                 return FALSE;
 513
 514         CLSID clsId;
 515         IUnknown * pUnk = NULL;
 516
 517         wxBasicString unicodeName(classId.mb_str());
 518
 519         if (FAILED(CLSIDFromProgID((BSTR) unicodeName, &clsId)))
 520         {
 521                 wxLogWarning(wxT("Cannot obtain CLSID from ProgID"));
 522                 return FALSE;
 523         }
 524
 525         if (FAILED(GetActiveObject(clsId, NULL, &pUnk)))
 526         {
 527                 wxLogWarning(wxT("Cannot find an active object"));
 528                 return FALSE;
 529         }
 530
 531         if (pUnk->QueryInterface(IID_IDispatch, (LPVOID*) &m_dispatchPtr) != S_OK)
 532         {
 533                 wxLogWarning(wxT("Cannot find IDispatch interface"));
 534                 return FALSE;
 535         }
 536
 537         return TRUE;
 538 }
 539
 540 // Get a dispatch pointer from a new object associated
 541 // with the given class id
 542 bool wxAutomationObject::CreateInstance(const wxString& classId) const
 543 {
 544         if (m_dispatchPtr)
 545                 return FALSE;
 546
 547         CLSID clsId;
 548
 549         wxBasicString unicodeName(classId.mb_str());
 550
 551         if (FAILED(CLSIDFromProgID((BSTR) unicodeName, &clsId)))
 552         {
 553                 wxLogWarning(wxT("Cannot obtain CLSID from ProgID"));
 554                 return FALSE;
 555         }
 556
 557         // start a new copy of Excel, grab the IDispatch interface
 558         if (FAILED(CoCreateInstance(clsId, NULL, CLSCTX_LOCAL_SERVER, IID_IDispatch, (void**)&m_dispatchPtr)))
 559         {
 560                 wxLogWarning(wxT("Cannot start an instance of this class."));
 561                 return FALSE;
 562         }
 563
 564         return TRUE;
 565 }
 566
 567
 568 bool wxConvertVariantToOle(const wxVariant& variant, VARIANTARG& oleVariant)
 569 {
 570         ClearVariant(&oleVariant);
 571         if (variant.IsNull())
 572         {
 573                 oleVariant.vt = VT_NULL;
 574                 return TRUE;
 575         }
 576
 577     wxString type(variant.GetType());
 578
 579
 580     if (type == wxT("long"))
 581     {
 582         oleVariant.vt = VT_I4;
 583         oleVariant.lVal = variant.GetLong() ;
 584     }
 585     // cVal not always present
 586 #ifndef __GNUWIN32__
 587     else if (type == wxT("char"))
 588     {
 589         oleVariant.vt=VT_I1;                    // Signed Char
 590         oleVariant.cVal=variant.GetChar();
 591     }
 592 #endif
 593     else if (type == wxT("double"))
 594     {
 595         oleVariant.vt = VT_R8;
 596         oleVariant.dblVal = variant.GetDouble();
 597     }
 598     else if (type == wxT("bool"))
 599     {
 600         oleVariant.vt = VT_BOOL;
 601         // 'bool' required for VC++ 4 apparently
 602 #if (defined(__VISUALC__) && (__VISUALC__ <= 1000))
 603         oleVariant.bool = variant.GetBool();
 604 #else
 605         oleVariant.boolVal = variant.GetBool();
 606 #endif
 607     }
 608     else if (type == wxT("string"))
 609     {
 610         wxString str( variant.GetString() );
 611         oleVariant.vt = VT_BSTR;
 612         oleVariant.bstrVal = wxConvertStringToOle(str);
 613     }
 614 // For some reason, Watcom C++ can't link variant.cpp with time/date classes compiled
 615 // Now obsolete
 616 #if 0 // wxUSE_TIMEDATE && !defined(__WATCOMC__)
 617     else if (type == wxT("date"))
 618     {
 619         wxDate date( variant.GetDate() );
 620         oleVariant.vt = VT_DATE;
 621
 622                 if (!OleDateFromTm(date.GetYear(), date.GetMonth(), date.GetDay(),
 623                                 0, 0, 0, oleVariant.date))
 624                         return FALSE;
 625     }
 626     else if (type == wxT("time"))
 627     {
 628         wxTime time( variant.GetTime() );
 629         oleVariant.vt = VT_DATE;
 630
 631                 if (!OleDateFromTm(time.GetYear(), time.GetMonth(), time.GetDay(),
 632                         time.GetHour(), time.GetMinute(), time.GetSecond(), oleVariant.date))
 633                         return FALSE;
 634     }
 635 #endif
 636 #if wxUSE_DATETIME
 637     else if (type == wxT("datetime"))
 638     {
 639         wxDateTime date( variant.GetDateTime() );
 640         oleVariant.vt = VT_DATE;
 641
 642                 if (!OleDateFromTm(date.GetYear(), date.GetMonth(), date.GetDay(),
 643                                 date.GetHour(), date.GetMinute(), date.GetSecond(), oleVariant.date))
 644                         return FALSE;
 645     }
 646 #endif
 647     else if (type == wxT("void*"))
 648     {
 649         oleVariant.vt = VT_DISPATCH;
 650         oleVariant.pdispVal = (IDispatch*) variant.GetVoidPtr();
 651     }
 652     else if (type == wxT("list") || type == wxT("stringlist"))
 653     {
 654         oleVariant.vt = VT_VARIANT | VT_ARRAY;
 655
 656             SAFEARRAY *psa;
 657             SAFEARRAYBOUND saBound;
 658             VARIANTARG *pvargBase;
 659             VARIANTARG *pvarg;
 660             int i, j;
 661
 662         int iCount = variant.GetCount();
 663
 664             saBound.lLbound = 0;
 665             saBound.cElements = iCount;
 666
 667             psa = SafeArrayCreate(VT_VARIANT, 1, &saBound);
 668             if (psa == NULL)
 669                     return FALSE;
 670
 671             SafeArrayAccessData(psa, (void**)&pvargBase);
 672
 673             pvarg = pvargBase;
 674             for (i = 0; i < iCount; i++)
 675             {
 676                     // copy each string in the list of strings
 677             wxVariant eachVariant(variant[i]);
 678             if (!wxConvertVariantToOle(eachVariant, * pvarg))
 679             {
 680                             // memory failure:  back out and free strings alloc'ed up to
 681                             // now, and then the array itself.
 682                             pvarg = pvargBase;
 683                             for (j = 0; j < i; j++)
 684                             {
 685                                     SysFreeString(pvarg->bstrVal);
 686                                     pvarg++;
 687                             }
 688                             SafeArrayDestroy(psa);
 689                             return FALSE;
 690                     }
 691                     pvarg++;
 692             }
 693
 694             SafeArrayUnaccessData(psa);
 695
 696         oleVariant.parray = psa;
 697     }
 698     else
 699     {
 700         oleVariant.vt = VT_NULL;
 701         return FALSE;
 702     }
 703     return TRUE;
 704 }
 705
 706 #ifndef VT_TYPEMASK
 707 #define VT_TYPEMASK 0xfff
 708 #endif
 709
 710 bool wxConvertOleToVariant(const VARIANTARG& oleVariant, wxVariant& variant)
 711 {
 712         switch (oleVariant.vt & VT_TYPEMASK)
 713         {
 714         case VT_BSTR:
 715                 {
 716                         wxString str(wxConvertStringFromOle(oleVariant.bstrVal));
 717                         variant = str;
 718                         break;
 719                 }
 720         case VT_DATE:
 721                 {
 722 #if wxUSE_DATETIME
 723             struct tm tmTemp;
 724                         if (!TmFromOleDate(oleVariant.date, tmTemp))
 725                                 return FALSE;
 726
 727                         wxDateTime date(tmTemp.tm_yday, (wxDateTime::Month) tmTemp.tm_mon, tmTemp.tm_year, tmTemp.tm_hour, tmTemp.tm_min, tmTemp.tm_sec);
 728
 729                         variant = date;
 730 #endif
 731
 732             break;
 733                 }
 734         case VT_I4:
 735                 {
 736                         variant = (long) oleVariant.lVal;
 737                         break;
 738                 }
 739         case VT_I2:
 740                 {
 741                         variant = (long) oleVariant.iVal;
 742                         break;
 743                 }
 744
 745         case VT_BOOL:
 746                 {
 747 #if (defined(_MSC_VER) && (_MSC_VER <= 1000) && !defined(__MWERKS__) ) //GC
 748 #ifndef HAVE_BOOL // Can't use bool operator if no native bool type
 749                         variant = (long) (oleVariant.bool != 0);
 750 #else
 751                         variant = (bool) (oleVariant.bool != 0);
 752 #endif
 753 #else
 754 #ifndef HAVE_BOOL // Can't use bool operator if no native bool type
 755                         variant = (long) (oleVariant.boolVal != 0);
 756 #else
 757                         variant = (bool) (oleVariant.boolVal != 0);
 758 #endif
 759 #endif
 760                         break;
 761                 }
 762         case VT_R8:
 763                 {
 764                         variant = oleVariant.dblVal;
 765                         break;
 766                 }
 767         case VT_ARRAY:
 768                 {
 769                         variant.ClearList();
 770
 771                         int cDims, cElements, i;
 772                         VARIANTARG* pvdata;
 773
 774                         // Iterate the dimensions: number of elements is x*y*z
 775                         for (cDims = 0, cElements = 1;
 776                                 cDims < oleVariant.parray->cDims; cDims ++)
 777                                         cElements *= oleVariant.parray->rgsabound[cDims].cElements;
 778
 779                         // Get a pointer to the data
 780                         HRESULT hr = SafeArrayAccessData(oleVariant.parray, (void HUGEP* FAR*) & pvdata);
 781                         if (hr != NOERROR)
 782                                 return FALSE;
 783                         // Iterate the data.
 784                         for (i = 0; i < cElements; i++)
 785                         {
 786                                 VARIANTARG& oleElement = pvdata[i];
 787                                 wxVariant vElement;
 788                                 if (!wxConvertOleToVariant(oleElement, vElement))
 789                                         return FALSE;
 790
 791                                 variant.Append(vElement);
 792                         }
 793                         SafeArrayUnaccessData(oleVariant.parray);
 794                         break;
 795                 }
 796         case VT_DISPATCH:
 797                 {
 798                         variant = (void*) oleVariant.pdispVal;
 799                         break;
 800                 }
 801         case VT_NULL:
 802                 {
 803                         variant.MakeNull();
 804                         break;
 805                 }
 806         case VT_EMPTY:
 807                 {
 808                         break;  // Ignore Empty Variant, used only during destruction of objects
 809                 }
 810         default:
 811                 {
 812                         wxLogError(wxT("wxAutomationObject::ConvertOleToVariant: Unknown variant value type"));
 813                         return FALSE;
 814                 }
 815         }
 816     return TRUE;
 817 }
 818
 819 BSTR wxConvertStringToOle(const wxString& str)
 820 {
 821 /*
 822         unsigned int len = strlen((const char*) str);
 823         unsigned short* s = new unsigned short[len*2+2];
 824         unsigned int i;
 825         memset(s, 0, len*2+2);
 826         for (i=0; i < len; i++)
 827                 s[i*2] = str[i];
 828 */
 829         wxBasicString bstr(str.mb_str());
 830         return bstr.Get();
 831 }
 832
 833 wxString wxConvertStringFromOle(BSTR bStr)
 834 {
 835 #if wxUSE_UNICODE
 836     wxString str(bStr);
 837 #else
 838         int len = SysStringLen(bStr) + 1;
 839         char    *buf = new char[len];
 840         (void)wcstombs( buf, bStr, len);
 841         wxString str(buf);
 842         delete[] buf;
 843 #endif
 844         return str;
 845 }
 846
 847 // ----------------------------------------------------------------------------
 848 // wxBasicString
 849 // ----------------------------------------------------------------------------
 850
 851 // ctor takes an ANSI string and transforms it to Unicode
 852 wxBasicString::wxBasicString(const char *sz)
 853 {
 854     Init(sz);
 855 }
 856
 857 // ctor takes an ANSI or Unicode string and transforms it to Unicode
 858 wxBasicString::wxBasicString(const wxString& str)
 859 {
 860 #if wxUSE_UNICODE
 861     m_wzBuf = new OLECHAR[str.Length() + 1];
 862     memcpy(m_wzBuf, str.c_str(), str.Length()*2);
 863     m_wzBuf[str.Length()] = L'\0';
 864 #else
 865     Init(str.c_str());
 866 #endif
 867 }
 868
 869 // Takes an ANSI string and transforms it to Unicode
 870 void wxBasicString::Init(const char *sz)
 871 {
 872     // get the size of required buffer
 873     UINT lenAnsi = strlen(sz);
 874 #ifdef __MWERKS__
 875     UINT lenWide = lenAnsi * 2 ;
 876 #else
 877     UINT lenWide = mbstowcs(NULL, sz, lenAnsi);
 878 #endif
 879
 880     if ( lenWide > 0 ) {
 881         m_wzBuf = new OLECHAR[lenWide + 1];
 882         mbstowcs(m_wzBuf, sz, lenAnsi);
 883         m_wzBuf[lenWide] = L'\0';
 884     }
 885     else {
 886         m_wzBuf = NULL;
 887     }
 888 }
 889
 890 // dtor frees memory
 891 wxBasicString::~wxBasicString()
 892 {
 893   delete [] m_wzBuf;
 894 }
 895
 896 /////////////////////////////////////////////////////////////////////////////
 897 // COleDateTime class HELPERS - implementation
 898
 899 BOOL OleDateFromTm(WORD wYear, WORD wMonth, WORD wDay,
 900         WORD wHour, WORD wMinute, WORD wSecond, DATE& dtDest)
 901 {
 902         // Validate year and month (ignore day of week and milliseconds)
 903         if (wYear > 9999 || wMonth < 1 || wMonth > 12)
 904                 return FALSE;
 905
 906         //  Check for leap year and set the number of days in the month
 907         BOOL bLeapYear = ((wYear & 3) == 0) &&
 908                 ((wYear % 100) != 0 || (wYear % 400) == 0);
 909
 910         int nDaysInMonth =
 911                 rgMonthDays[wMonth] - rgMonthDays[wMonth-1] +
 912                 ((bLeapYear && wDay == 29 && wMonth == 2) ? 1 : 0);
 913
 914         // Finish validating the date
 915         if (wDay < 1 || wDay > nDaysInMonth ||
 916                 wHour > 23 || wMinute > 59 ||
 917                 wSecond > 59)
 918         {
 919                 return FALSE;
 920         }
 921
 922         // Cache the date in days and time in fractional days
 923         long nDate;
 924         double dblTime;
 925
 926         //It is a valid date; make Jan 1, 1AD be 1
 927         nDate = wYear*365L + wYear/4 - wYear/100 + wYear/400 +
 928                 rgMonthDays[wMonth-1] + wDay;
 929
 930         //  If leap year and it's before March, subtract 1:
 931         if (wMonth <= 2 && bLeapYear)
 932                 --nDate;
 933
 934         //  Offset so that 12/30/1899 is 0
 935         nDate -= 693959L;
 936
 937         dblTime = (((long)wHour * 3600L) +  // hrs in seconds
 938                 ((long)wMinute * 60L) +  // mins in seconds
 939                 ((long)wSecond)) / 86400.;
 940
 941         dtDest = (double) nDate + ((nDate >= 0) ? dblTime : -dblTime);
 942
 943         return TRUE;
 944 }
 945
 946 BOOL TmFromOleDate(DATE dtSrc, struct tm& tmDest)
 947 {
 948         // The legal range does not actually span year 0 to 9999.
 949         if (dtSrc > MAX_DATE || dtSrc < MIN_DATE) // about year 100 to about 9999
 950                 return FALSE;
 951
 952         long nDaysAbsolute;     // Number of days since 1/1/0
 953         long nSecsInDay;        // Time in seconds since midnight
 954         long nMinutesInDay;     // Minutes in day
 955
 956         long n400Years;         // Number of 400 year increments since 1/1/0
 957         long n400Century;       // Century within 400 year block (0,1,2 or 3)
 958         long n4Years;           // Number of 4 year increments since 1/1/0
 959         long n4Day;             // Day within 4 year block
 960                                                         //  (0 is 1/1/yr1, 1460 is 12/31/yr4)
 961         long n4Yr;              // Year within 4 year block (0,1,2 or 3)
 962         BOOL bLeap4 = TRUE;     // TRUE if 4 year block includes leap year
 963
 964         double dblDate = dtSrc; // tempory serial date
 965
 966         // Round to the second
 967         dblDate += ((dtSrc > 0.0) ? HALF_SECOND : -HALF_SECOND);
 968
 969         nDaysAbsolute = (long)dblDate + 693959L; // Add days from 1/1/0 to 12/30/1899
 970
 971         dblDate = fabs(dblDate);
 972         nSecsInDay = (long)((dblDate - floor(dblDate)) * 86400.);
 973
 974         // Calculate the day of week (sun=1, mon=2...)
 975         //   -1 because 1/1/0 is Sat.  +1 because we want 1-based
 976         tmDest.tm_wday = (int)((nDaysAbsolute - 1) % 7L) + 1;
 977
 978         // Leap years every 4 yrs except centuries not multiples of 400.
 979         n400Years = (long)(nDaysAbsolute / 146097L);
 980
 981         // Set nDaysAbsolute to day within 400-year block
 982         nDaysAbsolute %= 146097L;
 983
 984         // -1 because first century has extra day
 985         n400Century = (long)((nDaysAbsolute - 1) / 36524L);
 986
 987         // Non-leap century
 988         if (n400Century != 0)
 989         {
 990                 // Set nDaysAbsolute to day within century
 991                 nDaysAbsolute = (nDaysAbsolute - 1) % 36524L;
 992
 993                 // +1 because 1st 4 year increment has 1460 days
 994                 n4Years = (long)((nDaysAbsolute + 1) / 1461L);
 995
 996                 if (n4Years != 0)
 997                         n4Day = (long)((nDaysAbsolute + 1) % 1461L);
 998                 else
 999                 {
1000                         bLeap4 = FALSE;
1001                         n4Day = (long)nDaysAbsolute;
1002                 }
1003         }
1004         else
1005         {
1006                 // Leap century - not special case!
1007                 n4Years = (long)(nDaysAbsolute / 1461L);
1008                 n4Day = (long)(nDaysAbsolute % 1461L);
1009         }
1010
1011         if (bLeap4)
1012         {
1013                 // -1 because first year has 366 days
1014                 n4Yr = (n4Day - 1) / 365;
1015
1016                 if (n4Yr != 0)
1017                         n4Day = (n4Day - 1) % 365;
1018         }
1019         else
1020         {
1021                 n4Yr = n4Day / 365;
1022                 n4Day %= 365;
1023         }
1024
1025         // n4Day is now 0-based day of year. Save 1-based day of year, year number
1026         tmDest.tm_yday = (int)n4Day + 1;
1027         tmDest.tm_year = n400Years * 400 + n400Century * 100 + n4Years * 4 + n4Yr;
1028
1029         // Handle leap year: before, on, and after Feb. 29.
1030         if (n4Yr == 0 && bLeap4)
1031         {
1032                 // Leap Year
1033                 if (n4Day == 59)
1034                 {
1035                         /* Feb. 29 */
1036                         tmDest.tm_mon = 2;
1037                         tmDest.tm_mday = 29;
1038                         goto DoTime;
1039                 }
1040
1041                 // Pretend it's not a leap year for month/day comp.
1042                 if (n4Day >= 60)
1043                         --n4Day;
1044         }
1045
1046         // Make n4DaY a 1-based day of non-leap year and compute
1047         //  month/day for everything but Feb. 29.
1048         ++n4Day;
1049
1050         // Month number always >= n/32, so save some loop time */
1051         for (tmDest.tm_mon = (n4Day >> 5) + 1;
1052                 n4Day > rgMonthDays[tmDest.tm_mon]; tmDest.tm_mon++)
1053                 ;
1054
1055         tmDest.tm_mday = (int)(n4Day - rgMonthDays[tmDest.tm_mon-1]);
1056
1057 DoTime:
1058         if (nSecsInDay == 0)
1059                 tmDest.tm_hour = tmDest.tm_min = tmDest.tm_sec = 0;
1060         else
1061         {
1062                 tmDest.tm_sec = (int)nSecsInDay % 60L;
1063                 nMinutesInDay = nSecsInDay / 60L;
1064                 tmDest.tm_min = (int)nMinutesInDay % 60;
1065                 tmDest.tm_hour = (int)nMinutesInDay / 60;
1066         }
1067
1068         return TRUE;
1069 }
1070
1071 // this function is not used
1072 #if 0
1073 void TmConvertToStandardFormat(struct tm& tmSrc)
1074 {
1075         // Convert afx internal tm to format expected by runtimes (_tcsftime, etc)
1076         tmSrc.tm_year -= 1900;  // year is based on 1900
1077         tmSrc.tm_mon -= 1;      // month of year is 0-based
1078         tmSrc.tm_wday -= 1;     // day of week is 0-based
1079         tmSrc.tm_yday -= 1;     // day of year is 0-based
1080 }
1081
1082 double DoubleFromDate(DATE dt)
1083 {
1084         // No problem if positive
1085         if (dt >= 0)
1086                 return dt;
1087
1088         // If negative, must convert since negative dates not continuous
1089         // (examples: -1.25 to -.75, -1.50 to -.50, -1.75 to -.25)
1090         double temp = ceil(dt);
1091         return temp - (dt - temp);
1092 }
1093
1094 DATE DateFromDouble(double dbl)
1095 {
1096         // No problem if positive
1097         if (dbl >= 0)
1098                 return dbl;
1099
1100         // If negative, must convert since negative dates not continuous
1101         // (examples: -.75 to -1.25, -.50 to -1.50, -.25 to -1.75)
1102         double temp = floor(dbl); // dbl is now whole part
1103         return temp + (temp - dbl);
1104 }
1105 #endif // 0
1106
1107 /*
1108  *  ClearVariant
1109  *
1110  *  Zeros a variant structure without regard to current contents
1111  */
1112 static void ClearVariant(VARIANTARG *pvarg)
1113 {
1114         pvarg->vt = VT_EMPTY;
1115         pvarg->wReserved1 = 0;
1116         pvarg->wReserved2 = 0;
1117         pvarg->wReserved3 = 0;
1118         pvarg->lVal = 0;
1119 }
1120
1121 /*
1122  *  ReleaseVariant
1123  *
1124  *  Clears a particular variant structure and releases any external objects
1125  *  or memory contained in the variant.  Supports the data types listed above.
1126  */
1127 static void ReleaseVariant(VARIANTARG *pvarg)
1128 {
1129         VARTYPE vt;
1130         VARIANTARG _huge *pvargArray;
1131         long lLBound, lUBound, l;
1132
1133         vt = pvarg->vt & 0xfff;         // mask off flags
1134
1135         // check if an array.  If so, free its contents, then the array itself.
1136         if (V_ISARRAY(pvarg))
1137         {
1138                 // variant arrays are all this routine currently knows about.  Since a
1139                 // variant can contain anything (even other arrays), call ourselves
1140                 // recursively.
1141                 if (vt == VT_VARIANT)
1142                 {
1143                         SafeArrayGetLBound(pvarg->parray, 1, &lLBound);
1144                         SafeArrayGetUBound(pvarg->parray, 1, &lUBound);
1145
1146                         if (lUBound > lLBound)
1147                         {
1148                                 lUBound -= lLBound;
1149
1150                                 SafeArrayAccessData(pvarg->parray, (void**)&pvargArray);
1151
1152                                 for (l = 0; l < lUBound; l++)
1153                                 {
1154                                         ReleaseVariant(pvargArray);
1155                                         pvargArray++;
1156                                 }
1157
1158                                 SafeArrayUnaccessData(pvarg->parray);
1159                         }
1160                 }
1161                 else
1162                 {
1163                         wxLogWarning(wxT("ReleaseVariant: Array contains non-variant type"));
1164                 }
1165
1166                 // Free the array itself.
1167                 SafeArrayDestroy(pvarg->parray);
1168         }
1169         else
1170         {
1171                 switch (vt)
1172                 {
1173                         case VT_DISPATCH:
1174                                 if (pvarg->pdispVal)
1175                                         pvarg->pdispVal->Release();
1176                                 break;
1177
1178                         case VT_BSTR:
1179                                 SysFreeString(pvarg->bstrVal);
1180                                 break;
1181
1182                         case VT_I2:
1183                         case VT_BOOL:
1184                         case VT_R8:
1185                         case VT_ERROR:          // to avoid erroring on an error return from Excel
1186                                 // no work for these types
1187                                 break;
1188
1189                         default:
1190                                 wxLogWarning(wxT("ReleaseVariant: Unknown type"));
1191                                 break;
1192                 }
1193         }
1194
1195         ClearVariant(pvarg);
1196 }
1197
1198 #if 0
1199
1200 void ShowException(LPOLESTR szMember, HRESULT hr, EXCEPINFO *pexcep, unsigned int uiArgErr)
1201 {
1202         TCHAR szBuf[512];
1203
1204         switch (GetScode(hr))
1205         {
1206                 case DISP_E_UNKNOWNNAME:
1207                         wsprintf(szBuf, L"%s: Unknown name or named argument.", szMember);
1208                         break;
1209
1210                 case DISP_E_BADPARAMCOUNT:
1211                         wsprintf(szBuf, L"%s: Incorrect number of arguments.", szMember);
1212                         break;
1213
1214                 case DISP_E_EXCEPTION:
1215                         wsprintf(szBuf, L"%s: Error %d: ", szMember, pexcep->wCode);
1216                         if (pexcep->bstrDescription != NULL)
1217                                 lstrcat(szBuf, pexcep->bstrDescription);
1218                         else
1219                                 lstrcat(szBuf, L"<<No Description>>");
1220                         break;
1221
1222                 case DISP_E_MEMBERNOTFOUND:
1223                         wsprintf(szBuf, L"%s: method or property not found.", szMember);
1224                         break;
1225
1226                 case DISP_E_OVERFLOW:
1227                         wsprintf(szBuf, L"%s: Overflow while coercing argument values.", szMember);
1228                         break;
1229
1230                 case DISP_E_NONAMEDARGS:
1231                         wsprintf(szBuf, L"%s: Object implementation does not support named arguments.",
1232                                                 szMember);
1233                     break;
1234
1235                 case DISP_E_UNKNOWNLCID:
1236                         wsprintf(szBuf, L"%s: The locale ID is unknown.", szMember);
1237                         break;
1238
1239                 case DISP_E_PARAMNOTOPTIONAL:
1240                         wsprintf(szBuf, L"%s: Missing a required parameter.", szMember);
1241                         break;
1242
1243                 case DISP_E_PARAMNOTFOUND:
1244                         wsprintf(szBuf, L"%s: Argument not found, argument %d.", szMember, uiArgErr);
1245                         break;
1246
1247                 case DISP_E_TYPEMISMATCH:
1248                         wsprintf(szBuf, L"%s: Type mismatch, argument %d.", szMember, uiArgErr);
1249                         break;
1250
1251                 default:
1252                         wsprintf(szBuf, L"%s: Unknown error occured.", szMember);
1253                         break;
1254         }
1255
1256         wxLogWarning(szBuf);
1257 }
1258
1259 #endif
1260
1261 #endif // wxUSE_OLE && !(defined(__BORLANDC__) && (__BORLANDC__ < 0x520)) && !defined(__CYGWIN10__)
1262