src/msw/mimetype.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/mimetype.cpp
   3 // Purpose:     classes and functions to manage MIME types
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     23.09.98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows licence (part of wxExtra library)
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef    __GNUG__
  13 #pragma implementation "mimetype.h"
  14 #endif
  15
  16 // for compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20   #pragma hdrstop
  21 #endif
  22
  23 #if wxUSE_MIMETYPE
  24
  25 // Doesn't compile in WIN16 mode
  26 #ifndef __WIN16__
  27
  28 #ifndef WX_PRECOMP
  29     #include "wx/string.h"
  30     #if wxUSE_GUI
  31         #include "wx/icon.h"
  32         #include "wx/msgdlg.h"
  33     #endif
  34 #endif //WX_PRECOMP
  35
  36 #include "wx/log.h"
  37 #include "wx/file.h"
  38 #include "wx/iconloc.h"
  39 #include "wx/intl.h"
  40 #include "wx/dynarray.h"
  41 #include "wx/confbase.h"
  42
  43 #ifdef __WXMSW__
  44     #include "wx/msw/registry.h"
  45     #include "wx/msw/private.h"
  46 #endif // OS
  47
  48 #include "wx/msw/mimetype.h"
  49
  50 // other standard headers
  51 #include <ctype.h>
  52
  53 // in case we're compiling in non-GUI mode
  54 class WXDLLEXPORT wxIcon;
  55
  56 // These classes use Windows registry to retrieve the required information.
  57 //
  58 // Keys used (not all of them are documented, so it might actually stop working
  59 // in future versions of Windows...):
  60 //  1. "HKCR\MIME\Database\Content Type" contains subkeys for all known MIME
  61 //     types, each key has a string value "Extension" which gives (dot preceded)
  62 //     extension for the files of this MIME type.
  63 //
  64 //  2. "HKCR\.ext" contains
  65 //   a) unnamed value containing the "filetype"
  66 //   b) value "Content Type" containing the MIME type
  67 //
  68 // 3. "HKCR\filetype" contains
  69 //   a) unnamed value containing the description
  70 //   b) subkey "DefaultIcon" with single unnamed value giving the icon index in
  71 //      an icon file
  72 //   c) shell\open\command and shell\open\print subkeys containing the commands
  73 //      to open/print the file (the positional parameters are introduced by %1,
  74 //      %2, ... in these strings, we change them to %s ourselves)
  75
  76 // although I don't know of any official documentation which mentions this
  77 // location, uses it, so it isn't likely to change
  78 static const wxChar *MIME_DATABASE_KEY = wxT("MIME\\Database\\Content Type\\");
  79
  80 // this function replaces Microsoft %1 with Unix-like %s
  81 static bool CanonicalizeParams(wxString& command)
  82 {
  83     // transform it from '%1' to '%s' style format string (now also test for %L
  84     // as apparently MS started using it as well for the same purpose)
  85
  86     // NB: we don't make any attempt to verify that the string is valid, i.e.
  87     //     doesn't contain %2, or second %1 or .... But we do make sure that we
  88     //     return a string with _exactly_ one '%s'!
  89     bool foundFilename = false;
  90     size_t len = command.length();
  91     for ( size_t n = 0; (n < len) && !foundFilename; n++ )
  92     {
  93         if ( command[n] == wxT('%') &&
  94                 (n + 1 < len) &&
  95                 (command[n + 1] == wxT('1') || command[n + 1] == wxT('L')) )
  96         {
  97             // replace it with '%s'
  98             command[n + 1] = wxT('s');
  99
 100             foundFilename = true;
 101         }
 102     }
 103
 104     return foundFilename;
 105 }
 106
 107 void wxFileTypeImpl::Init(const wxString& strFileType, const wxString& ext)
 108 {
 109     // VZ: does it? (FIXME)
 110     wxCHECK_RET( !ext.IsEmpty(), _T("needs an extension") );
 111
 112     if ( ext[0u] != wxT('.') ) {
 113         m_ext = wxT('.');
 114     }
 115     m_ext << ext;
 116
 117     m_strFileType = strFileType;
 118     if ( !strFileType ) {
 119         m_strFileType = m_ext.AfterFirst('.') + _T("_auto_file");
 120     }
 121 }
 122
 123 wxString wxFileTypeImpl::GetVerbPath(const wxString& verb) const
 124 {
 125     wxString path;
 126     path << m_strFileType << _T("\\shell\\") << verb << _T("\\command");
 127     return path;
 128 }
 129
 130 size_t wxFileTypeImpl::GetAllCommands(wxArrayString *verbs,
 131                                       wxArrayString *commands,
 132                                       const wxFileType::MessageParameters& params) const
 133 {
 134     wxCHECK_MSG( !m_ext.IsEmpty(), 0, _T("GetAllCommands() needs an extension") );
 135
 136     if ( m_strFileType.IsEmpty() )
 137     {
 138         // get it from the registry
 139         wxFileTypeImpl *self = wxConstCast(this, wxFileTypeImpl);
 140         wxRegKey rkey(wxRegKey::HKCR, m_ext);
 141         if ( !rkey.Exists() || !rkey.QueryValue(wxEmptyString, self->m_strFileType) )
 142         {
 143             wxLogDebug(_T("Can't get the filetype for extension '%s'."),
 144                        m_ext.c_str());
 145
 146             return 0;
 147         }
 148     }
 149
 150     // enum all subkeys of HKCR\filetype\shell
 151     size_t count = 0;
 152     wxRegKey rkey(wxRegKey::HKCR, m_strFileType  + _T("\\shell"));
 153     long dummy;
 154     wxString verb;
 155     bool ok = rkey.GetFirstKey(verb, dummy);
 156     while ( ok )
 157     {
 158         wxString command = wxFileType::ExpandCommand(GetCommand(verb), params);
 159
 160         // we want the open bverb to eb always the first
 161
 162         if ( verb.CmpNoCase(_T("open")) == 0 )
 163         {
 164             if ( verbs )
 165                 verbs->Insert(verb, 0);
 166             if ( commands )
 167                 commands->Insert(command, 0);
 168         }
 169         else // anything else than "open"
 170         {
 171             if ( verbs )
 172                 verbs->Add(verb);
 173             if ( commands )
 174                 commands->Add(command);
 175         }
 176
 177         count++;
 178
 179         ok = rkey.GetNextKey(verb, dummy);
 180     }
 181
 182     return count;
 183 }
 184
 185 // ----------------------------------------------------------------------------
 186 // modify the registry database
 187 // ----------------------------------------------------------------------------
 188
 189 bool wxFileTypeImpl::EnsureExtKeyExists()
 190 {
 191     wxRegKey rkey(wxRegKey::HKCR, m_ext);
 192     if ( !rkey.Exists() )
 193     {
 194         if ( !rkey.Create() || !rkey.SetValue(wxEmptyString, m_strFileType) )
 195         {
 196             wxLogError(_("Failed to create registry entry for '%s' files."),
 197                        m_ext.c_str());
 198             return FALSE;
 199         }
 200     }
 201
 202     return TRUE;
 203 }
 204
 205 // ----------------------------------------------------------------------------
 206 // get the command to use
 207 // ----------------------------------------------------------------------------
 208
 209 wxString wxFileTypeImpl::GetCommand(const wxChar *verb) const
 210 {
 211     // suppress possible error messages
 212     wxLogNull nolog;
 213     wxString strKey;
 214
 215     if ( wxRegKey(wxRegKey::HKCR, m_ext + _T("\\shell")).Exists() )
 216         strKey = m_ext;
 217     if ( wxRegKey(wxRegKey::HKCR, m_strFileType + _T("\\shell")).Exists() )
 218         strKey = m_strFileType;
 219
 220     if ( !strKey )
 221     {
 222         // no info
 223         return wxEmptyString;
 224     }
 225
 226     strKey << wxT("\\shell\\") << verb;
 227     wxRegKey key(wxRegKey::HKCR, strKey + _T("\\command"));
 228     wxString command;
 229     if ( key.Open() ) {
 230         // it's the default value of the key
 231         if ( key.QueryValue(wxEmptyString, command) ) {
 232             bool foundFilename = CanonicalizeParams(command);
 233
 234 #if wxUSE_IPC
 235             // look whether we must issue some DDE requests to the application
 236             // (and not just launch it)
 237             strKey += _T("\\DDEExec");
 238             wxRegKey keyDDE(wxRegKey::HKCR, strKey);
 239             if ( keyDDE.Open() ) {
 240                 wxString ddeCommand, ddeServer, ddeTopic;
 241                 keyDDE.QueryValue(wxEmptyString, ddeCommand);
 242                 ddeCommand.Replace(_T("%1"), _T("%s"));
 243
 244                 wxRegKey(wxRegKey::HKCR, strKey + _T("\\Application")).
 245                     QueryValue(wxEmptyString, ddeServer);
 246                 wxRegKey(wxRegKey::HKCR, strKey + _T("\\Topic")).
 247                     QueryValue(wxEmptyString, ddeTopic);
 248
 249                 if (ddeTopic.IsEmpty())
 250                     ddeTopic = wxT("System");
 251
 252                 // HACK: we use a special feature of wxExecute which exists
 253                 //       just because we need it here: it will establish DDE
 254                 //       conversation with the program it just launched
 255                 command.Prepend(_T("WX_DDE#"));
 256                 command << _T('#') << ddeServer
 257                         << _T('#') << ddeTopic
 258                         << _T('#') << ddeCommand;
 259             }
 260             else
 261 #endif // wxUSE_IPC
 262             if ( !foundFilename )
 263             {
 264                 // we didn't find any '%1' - the application doesn't know which
 265                 // file to open (note that we only do it if there is no DDEExec
 266                 // subkey)
 267                 //
 268                 // HACK: append the filename at the end, hope that it will do
 269                 command << wxT(" %s");
 270             }
 271         }
 272     }
 273     //else: no such file type or no value, will return empty string
 274
 275     return command;
 276 }
 277
 278 bool
 279 wxFileTypeImpl::GetOpenCommand(wxString *openCmd,
 280                                const wxFileType::MessageParameters& params)
 281                                const
 282 {
 283     wxString cmd = GetCommand(wxT("open"));
 284
 285     *openCmd = wxFileType::ExpandCommand(cmd, params);
 286
 287     return !openCmd->IsEmpty();
 288 }
 289
 290 bool
 291 wxFileTypeImpl::GetPrintCommand(wxString *printCmd,
 292                                 const wxFileType::MessageParameters& params)
 293                                 const
 294 {
 295     wxString cmd = GetCommand(wxT("print"));
 296
 297     *printCmd = wxFileType::ExpandCommand(cmd, params);
 298
 299     return !printCmd->IsEmpty();
 300 }
 301
 302 // ----------------------------------------------------------------------------
 303 // getting other stuff
 304 // ----------------------------------------------------------------------------
 305
 306 // TODO this function is half implemented
 307 bool wxFileTypeImpl::GetExtensions(wxArrayString& extensions)
 308 {
 309     if ( m_ext.IsEmpty() ) {
 310         // the only way to get the list of extensions from the file type is to
 311         // scan through all extensions in the registry - too slow...
 312         return FALSE;
 313     }
 314     else {
 315         extensions.Empty();
 316         extensions.Add(m_ext);
 317
 318         // it's a lie too, we don't return _all_ extensions...
 319         return TRUE;
 320     }
 321 }
 322
 323 bool wxFileTypeImpl::GetMimeType(wxString *mimeType) const
 324 {
 325     // suppress possible error messages
 326     wxLogNull nolog;
 327     wxRegKey key(wxRegKey::HKCR, m_ext);
 328
 329     return key.Open() && key.QueryValue(wxT("Content Type"), *mimeType);
 330 }
 331
 332 bool wxFileTypeImpl::GetMimeTypes(wxArrayString& mimeTypes) const
 333 {
 334     wxString s;
 335
 336     if ( !GetMimeType(&s) )
 337     {
 338         return FALSE;
 339     }
 340
 341     mimeTypes.Clear();
 342     mimeTypes.Add(s);
 343     return TRUE;
 344 }
 345
 346
 347 bool wxFileTypeImpl::GetIcon(wxIconLocation *iconLoc) const
 348 {
 349     wxString strIconKey;
 350     strIconKey << m_strFileType << wxT("\\DefaultIcon");
 351
 352     // suppress possible error messages
 353     wxLogNull nolog;
 354     wxRegKey key(wxRegKey::HKCR, strIconKey);
 355
 356     if ( key.Open() ) {
 357         wxString strIcon;
 358         // it's the default value of the key
 359         if ( key.QueryValue(wxEmptyString, strIcon) ) {
 360             // the format is the following: <full path to file>, <icon index>
 361             // NB: icon index may be negative as well as positive and the full
 362             //     path may contain the environment variables inside '%'
 363             wxString strFullPath = strIcon.BeforeLast(wxT(',')),
 364             strIndex = strIcon.AfterLast(wxT(','));
 365
 366             // index may be omitted, in which case BeforeLast(',') is empty and
 367             // AfterLast(',') is the whole string
 368             if ( strFullPath.IsEmpty() ) {
 369                 strFullPath = strIndex;
 370                 strIndex = wxT("0");
 371             }
 372
 373             if ( iconLoc )
 374             {
 375                 iconLoc->SetFileName(wxExpandEnvVars(strFullPath));
 376
 377                 iconLoc->SetIndex(wxAtoi(strIndex));
 378             }
 379
 380             return TRUE;
 381         }
 382     }
 383
 384     // no such file type or no value or incorrect icon entry
 385     return FALSE;
 386 }
 387
 388 bool wxFileTypeImpl::GetDescription(wxString *desc) const
 389 {
 390     // suppress possible error messages
 391     wxLogNull nolog;
 392     wxRegKey key(wxRegKey::HKCR, m_strFileType);
 393
 394     if ( key.Open() ) {
 395         // it's the default value of the key
 396         if ( key.QueryValue(wxEmptyString, *desc) ) {
 397             return TRUE;
 398         }
 399     }
 400
 401     return FALSE;
 402 }
 403
 404 // helper function
 405 wxFileType *
 406 wxMimeTypesManagerImpl::CreateFileType(const wxString& filetype, const wxString& ext)
 407 {
 408     wxFileType *fileType = new wxFileType;
 409     fileType->m_impl->Init(filetype, ext);
 410     return fileType;
 411 }
 412
 413 // extension -> file type
 414 wxFileType *
 415 wxMimeTypesManagerImpl::GetFileTypeFromExtension(const wxString& ext)
 416 {
 417     // add the leading point if necessary
 418     wxString str;
 419     if ( ext[0u] != wxT('.') ) {
 420         str = wxT('.');
 421     }
 422     str << ext;
 423
 424     // suppress possible error messages
 425     wxLogNull nolog;
 426
 427     bool knownExtension = FALSE;
 428
 429     wxString strFileType;
 430     wxRegKey key(wxRegKey::HKCR, str);
 431     if ( key.Open() ) {
 432         // it's the default value of the key
 433         if ( key.QueryValue(wxEmptyString, strFileType) ) {
 434             // create the new wxFileType object
 435             return CreateFileType(strFileType, ext);
 436         }
 437         else {
 438             // this extension doesn't have a filetype, but it's known to the
 439             // system and may be has some other useful keys (open command or
 440             // content-type), so still return a file type object for it
 441             knownExtension = TRUE;
 442         }
 443     }
 444
 445     if ( !knownExtension )
 446     {
 447         // unknown extension
 448         return NULL;
 449     }
 450
 451     return CreateFileType(wxEmptyString, ext);
 452 }
 453
 454 /*
 455 wxFileType *
 456 wxMimeTypesManagerImpl::GetOrAllocateFileTypeFromExtension(const wxString& ext)
 457 {
 458     wxFileType *fileType = GetFileTypeFromExtension(ext);
 459     if ( !fileType )
 460     {
 461         fileType = CreateFileType(wxEmptyString, ext);
 462     }
 463
 464     return fileType;
 465 }
 466 */
 467
 468 // MIME type -> extension -> file type
 469 wxFileType *
 470 wxMimeTypesManagerImpl::GetFileTypeFromMimeType(const wxString& mimeType)
 471 {
 472     wxString strKey = MIME_DATABASE_KEY;
 473     strKey << mimeType;
 474
 475     // suppress possible error messages
 476     wxLogNull nolog;
 477
 478     wxString ext;
 479     wxRegKey key(wxRegKey::HKCR, strKey);
 480     if ( key.Open() ) {
 481         if ( key.QueryValue(wxT("Extension"), ext) ) {
 482             return GetFileTypeFromExtension(ext);
 483         }
 484     }
 485
 486     // unknown MIME type
 487     return NULL;
 488 }
 489
 490 size_t wxMimeTypesManagerImpl::EnumAllFileTypes(wxArrayString& mimetypes)
 491 {
 492     // enumerate all keys under MIME_DATABASE_KEY
 493     wxRegKey key(wxRegKey::HKCR, MIME_DATABASE_KEY);
 494
 495     wxString type;
 496     long cookie;
 497     bool cont = key.GetFirstKey(type, cookie);
 498     while ( cont )
 499     {
 500         mimetypes.Add(type);
 501
 502         cont = key.GetNextKey(type, cookie);
 503     }
 504
 505     return mimetypes.GetCount();
 506 }
 507
 508 // ----------------------------------------------------------------------------
 509 // create a new association
 510 // ----------------------------------------------------------------------------
 511
 512 wxFileType *wxMimeTypesManagerImpl::Associate(const wxFileTypeInfo& ftInfo)
 513 {
 514     wxCHECK_MSG( !ftInfo.GetExtensions().IsEmpty(), NULL,
 515                  _T("Associate() needs extension") );
 516
 517     bool ok;
 518     int iExtCount = 0 ;
 519     wxString filetype;
 520     wxString extWithDot;
 521
 522     wxString ext = ftInfo.GetExtensions()[iExtCount];
 523
 524     wxCHECK_MSG( !ext.empty(), NULL,
 525                  _T("Associate() needs non empty extension") );
 526
 527     if ( ext[0u] != _T('.') )
 528         extWithDot = _T('.');
 529     extWithDot += ext;
 530
 531     // start by setting the HKCR\\.ext entries
 532     // default is filetype; content type is mimetype
 533     const wxString& filetypeOrig = ftInfo.GetShortDesc();
 534
 535     wxRegKey key(wxRegKey::HKCR, extWithDot);
 536     if ( !key.Exists() )
 537     {
 538         // create the mapping from the extension to the filetype
 539         ok = key.Create();
 540         if ( ok )
 541         {
 542
 543             if ( filetypeOrig.empty() )
 544             {
 545                 // make it up from the extension
 546                 filetype << extWithDot.c_str() + 1 << _T("_file");
 547             }
 548             else
 549             {
 550                 // just use the provided one
 551                 filetype = filetypeOrig;
 552             }
 553
 554             key.SetValue(wxEmptyString, filetype);
 555         }
 556         }
 557         else
 558         {
 559             // key already exists, maybe we want to change it ??
 560             if (!filetypeOrig.empty())
 561                 {
 562                     filetype = filetypeOrig;
 563                     key.SetValue(wxEmptyString, filetype);
 564                 }
 565             else
 566                 {
 567                     key.QueryValue(wxEmptyString, filetype);
 568                 }
 569         }
 570         // now set a mimetypeif we have it, but ignore it if none
 571         const wxString& mimetype = ftInfo.GetMimeType();
 572         if ( !mimetype.empty() )
 573         {
 574             // set the MIME type
 575             ok = key.SetValue(_T("Content Type"), mimetype);
 576
 577             if ( ok )
 578             {
 579                 // create the MIME key
 580                 wxString strKey = MIME_DATABASE_KEY;
 581                 strKey << mimetype;
 582                 wxRegKey keyMIME(wxRegKey::HKCR, strKey);
 583                 ok = keyMIME.Create();
 584
 585                 if ( ok )
 586                 {
 587                     // and provide a back link to the extension
 588                     keyMIME.SetValue(_T("Extension"), extWithDot);
 589                 }
 590             }
 591         }
 592
 593
 594     // now make other extensions have the same filetype
 595
 596     for (iExtCount=1; iExtCount < ftInfo.GetExtensionsCount(); iExtCount++ )
 597         {
 598             ext = ftInfo.GetExtensions()[iExtCount];
 599             if ( ext[0u] != _T('.') )
 600                extWithDot = _T('.');
 601             extWithDot += ext;
 602
 603             wxRegKey key(wxRegKey::HKCR, extWithDot);
 604             if ( !key.Exists() ) key.Create();
 605             key.SetValue(wxEmptyString, filetype);
 606
 607         // now set any mimetypes we may have, but ignore it if none
 608         const wxString& mimetype = ftInfo.GetMimeType();
 609         if ( !mimetype.empty() )
 610         {
 611             // set the MIME type
 612             ok = key.SetValue(_T("Content Type"), mimetype);
 613
 614         if ( ok )
 615         {
 616                 // create the MIME key
 617                 wxString strKey = MIME_DATABASE_KEY;
 618                 strKey << mimetype;
 619                 wxRegKey keyMIME(wxRegKey::HKCR, strKey);
 620                 ok = keyMIME.Create();
 621
 622         if ( ok )
 623         {
 624                     // and provide a back link to the extension
 625                     keyMIME.SetValue(_T("Extension"), extWithDot);
 626         }
 627         }
 628     }
 629
 630
 631     } // end of for loop; all extensions now point to HKCR\.ext\Default
 632
 633     // create the filetype key itself (it will be empty for now, but
 634     // SetCommand(), SetDefaultIcon() &c will use it later)
 635     wxRegKey keyFT(wxRegKey::HKCR, filetype);
 636     keyFT.Create();
 637
 638     wxFileType *ft = CreateFileType(filetype, extWithDot);
 639
 640     if (ft)
 641     {
 642             if (! ftInfo.GetOpenCommand ().IsEmpty() ) ft->SetCommand (ftInfo.GetOpenCommand (), wxT("open"  ) );
 643             if (! ftInfo.GetPrintCommand().IsEmpty() ) ft->SetCommand (ftInfo.GetPrintCommand(), wxT("print" ) );
 644             // chris: I don't like the ->m_impl-> here FIX this ??
 645             if (! ftInfo.GetDescription ().IsEmpty() ) ft->m_impl->SetDescription (ftInfo.GetDescription ()) ;
 646             if (! ftInfo.GetIconFile().IsEmpty() ) ft->SetDefaultIcon (ftInfo.GetIconFile(), ftInfo.GetIconIndex() );
 647
 648         }
 649     return ft;
 650 }
 651
 652 bool wxFileTypeImpl::SetCommand(const wxString& cmd,
 653                                 const wxString& verb,
 654                                 bool WXUNUSED(overwriteprompt))
 655 {
 656     wxCHECK_MSG( !m_ext.IsEmpty() && !verb.IsEmpty(), FALSE,
 657                  _T("SetCommand() needs an extension and a verb") );
 658
 659     if ( !EnsureExtKeyExists() )
 660         return FALSE;
 661
 662     wxRegKey rkey(wxRegKey::HKCR, GetVerbPath(verb));
 663 #if 0
 664     if ( rkey.Exists() && overwriteprompt )
 665     {
 666 #if wxUSE_GUI
 667         wxString old;
 668         rkey.QueryValue(wxEmptyString, old);
 669         if ( wxMessageBox
 670              (
 671                 wxString::Format(
 672                     _("Do you want to overwrite the command used to %s "
 673                       "files with extension \"%s\" ?\nCurrent value is \n%s, "
 674                       "\nNew value is \n%s %1"), // bug here FIX need %1 ??
 675                     verb.c_str(),
 676                     m_ext.c_str(),
 677                     old.c_str(),
 678                     cmd.c_str()),
 679                 _("Confirm registry update"),
 680                 wxYES_NO | wxICON_QUESTION
 681              ) != wxYES )
 682 #endif // wxUSE_GUI
 683         {
 684             // cancelled by user
 685             return FALSE;
 686         }
 687     }
 688 #endif
 689     // TODO:
 690     // 1. translate '%s' to '%1' instead of always adding it
 691     // 2. create DDEExec value if needed (undo GetCommand)
 692     return rkey.Create() && rkey.SetValue(wxEmptyString, cmd + _T(" \"%1\"") );
 693 }
 694
 695 /* // no longer used
 696 bool wxFileTypeImpl::SetMimeType(const wxString& mimeTypeOrig)
 697 {
 698     wxCHECK_MSG( !m_ext.IsEmpty(), FALSE, _T("SetMimeType() needs extension") );
 699
 700     if ( !EnsureExtKeyExists() )
 701         return FALSE;
 702
 703     // VZ: is this really useful? (FIXME)
 704     wxString mimeType;
 705     if ( !mimeTypeOrig )
 706     {
 707         // make up a default value for it
 708         wxString cmd;
 709         wxSplitPath(GetCommand(_T("open")), NULL, &cmd, NULL);
 710         mimeType << _T("application/x-") << cmd;
 711     }
 712     else
 713     {
 714         mimeType = mimeTypeOrig;
 715     }
 716
 717     wxRegKey rkey(wxRegKey::HKCR, m_ext);
 718     return rkey.Create() && rkey.SetValue(_T("Content Type"), mimeType);
 719 }
 720 */
 721
 722 bool wxFileTypeImpl::SetDefaultIcon(const wxString& cmd, int index)
 723 {
 724     wxCHECK_MSG( !m_ext.IsEmpty(), FALSE, _T("SetDefaultIcon() needs extension") );
 725     wxCHECK_MSG( !m_strFileType.IsEmpty(), FALSE, _T("File key not found") );
 726 //    the next line fails on a SMBshare, I think because it is case mangled
 727 //    wxCHECK_MSG( !wxFileExists(cmd), FALSE, _T("Icon file not found.") );
 728
 729     if ( !EnsureExtKeyExists() )
 730         return FALSE;
 731
 732     wxRegKey rkey(wxRegKey::HKCR, m_strFileType + _T("\\DefaultIcon"));
 733
 734     return rkey.Create() &&
 735            rkey.SetValue(wxEmptyString,
 736                          wxString::Format(_T("%s,%d"), cmd.c_str(), index));
 737 }
 738
 739 bool wxFileTypeImpl::SetDescription (const wxString& desc)
 740 {
 741     wxCHECK_MSG( !m_strFileType.IsEmpty(), FALSE, _T("File key not found") );
 742     wxCHECK_MSG( !desc.IsEmpty(), FALSE, _T("No file description supplied") );
 743
 744     if ( !EnsureExtKeyExists() )
 745         return FALSE;
 746
 747     wxRegKey rkey(wxRegKey::HKCR, m_strFileType );
 748
 749     return rkey.Create() &&
 750            rkey.SetValue(wxEmptyString, desc);
 751 }
 752
 753 // ----------------------------------------------------------------------------
 754 // remove file association
 755 // ----------------------------------------------------------------------------
 756
 757 bool wxFileTypeImpl::Unassociate()
 758 {
 759     bool result = TRUE;
 760     if ( !RemoveOpenCommand() )
 761         result = FALSE;
 762     if ( !RemoveDefaultIcon() )
 763         result = FALSE;
 764     if ( !RemoveMimeType() )
 765         result = FALSE;
 766    if ( !RemoveDescription() )
 767         result = FALSE;
 768
 769 /*
 770     //this might hold other keys, eg some have CSLID keys
 771     if ( result )
 772     {
 773         // delete the root key
 774         wxRegKey key(wxRegKey::HKCR, m_ext);
 775         if ( key.Exists() )
 776             result = key.DeleteSelf();
 777     }
 778 */
 779     return result;
 780 }
 781
 782 bool wxFileTypeImpl::RemoveOpenCommand()
 783 {
 784    return RemoveCommand(_T("open"));
 785 }
 786
 787 bool wxFileTypeImpl::RemoveCommand(const wxString& verb)
 788 {
 789     wxCHECK_MSG( !m_ext.IsEmpty() && !verb.IsEmpty(), FALSE,
 790                  _T("RemoveCommand() needs an extension and a verb") );
 791
 792     wxString  sKey = m_strFileType;
 793     wxRegKey rkey(wxRegKey::HKCR, GetVerbPath(verb));
 794
 795     // if the key already doesn't exist, it's a success
 796     return !rkey.Exists() || rkey.DeleteSelf();
 797 }
 798
 799 bool wxFileTypeImpl::RemoveMimeType()
 800 {
 801     wxCHECK_MSG( !m_ext.IsEmpty(), FALSE, _T("RemoveMimeType() needs extension") );
 802
 803     wxRegKey rkey(wxRegKey::HKCR, m_ext);
 804     return !rkey.Exists() || rkey.DeleteSelf();
 805 }
 806
 807 bool wxFileTypeImpl::RemoveDefaultIcon()
 808 {
 809     wxCHECK_MSG( !m_ext.IsEmpty(), FALSE,
 810                  _T("RemoveDefaultIcon() needs extension") );
 811
 812     wxRegKey rkey (wxRegKey::HKCR, m_strFileType  + _T("\\DefaultIcon"));
 813     return !rkey.Exists() || rkey.DeleteSelf();
 814 }
 815
 816 bool wxFileTypeImpl::RemoveDescription()
 817 {
 818     wxCHECK_MSG( !m_ext.IsEmpty(), FALSE,
 819                  _T("RemoveDescription() needs extension") );
 820
 821     wxRegKey rkey (wxRegKey::HKCR, m_strFileType );
 822     return !rkey.Exists() || rkey.DeleteSelf();
 823 }
 824
 825 #endif
 826   // __WIN16__
 827
 828 #endif // wxUSE_MIMETYPE