src/common/filesys.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/filesys.cpp
   3 // Purpose:     wxFileSystem class - interface for opening files
   4 // Author:      Vaclav Slavik
   5 // Copyright:   (c) 1999 Vaclav Slavik
   6 // CVS-ID:      $Id$
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #include "wx/wxprec.h"
  11
  12 #ifdef __BORLANDC__
  13     #pragma hdrstop
  14 #endif
  15
  16
  17 #if wxUSE_FILESYSTEM
  18
  19 #include "wx/filesys.h"
  20
  21 #ifndef WX_PRECOMP
  22     #include "wx/log.h"
  23     #include "wx/module.h"
  24 #endif
  25
  26 #include "wx/sysopt.h"
  27 #include "wx/wfstream.h"
  28 #include "wx/mimetype.h"
  29 #include "wx/filename.h"
  30 #include "wx/tokenzr.h"
  31 #include "wx/uri.h"
  32 #include "wx/private/fileback.h"
  33
  34 // ----------------------------------------------------------------------------
  35 // wxFSFile
  36 // ----------------------------------------------------------------------------
  37
  38 const wxString& wxFSFile::GetMimeType() const
  39 {
  40     if ( m_MimeType.empty() && !m_Location.empty() )
  41     {
  42         wxConstCast(this, wxFSFile)->m_MimeType =
  43             wxFileSystemHandler::GetMimeTypeFromExt(m_Location);
  44     }
  45
  46     return m_MimeType;
  47 }
  48
  49 // ----------------------------------------------------------------------------
  50 // wxFileSystemHandler
  51 // ----------------------------------------------------------------------------
  52
  53 IMPLEMENT_ABSTRACT_CLASS(wxFileSystemHandler, wxObject)
  54
  55
  56 /* static */
  57 wxString wxFileSystemHandler::GetMimeTypeFromExt(const wxString& location)
  58 {
  59     wxString ext, mime;
  60     wxString loc = GetRightLocation(location);
  61     wxChar c;
  62     int l = loc.length(), l2;
  63
  64     l2 = l;
  65     for (int i = l-1; i >= 0; i--)
  66     {
  67         c = loc[(unsigned int) i];
  68         if ( c == wxT('#') )
  69             l2 = i + 1;
  70         if ( c == wxT('.') )
  71         {
  72             ext = loc.Right(l2-i-1);
  73             break;
  74         }
  75         if ( (c == wxT('/')) || (c == wxT('\\')) || (c == wxT(':')) )
  76             return wxEmptyString;
  77     }
  78
  79 #if wxUSE_MIMETYPE
  80     static bool s_MinimalMimeEnsured = false;
  81
  82     // Don't use mime types manager if the application doesn't need it and it would be
  83     // cause an unacceptable delay, especially on startup.
  84     bool useMimeTypesManager = true;
  85 #if wxUSE_SYSTEM_OPTIONS
  86     useMimeTypesManager = (wxSystemOptions::GetOptionInt(wxT("filesys.no-mimetypesmanager")) == 0);
  87 #endif
  88
  89     if (useMimeTypesManager)
  90     {
  91         if (!s_MinimalMimeEnsured)
  92         {
  93             static const wxFileTypeInfo fallbacks[] =
  94             {
  95                 wxFileTypeInfo(_T("image/jpeg"),
  96                     wxEmptyString,
  97                     wxEmptyString,
  98                     _T("JPEG image (from fallback)"),
  99                     _T("jpg"), _T("jpeg"), _T("JPG"), _T("JPEG"), wxNullPtr),
 100                     wxFileTypeInfo(_T("image/gif"),
 101                     wxEmptyString,
 102                     wxEmptyString,
 103                     _T("GIF image (from fallback)"),
 104                     _T("gif"), _T("GIF"), wxNullPtr),
 105                     wxFileTypeInfo(_T("image/png"),
 106                     wxEmptyString,
 107                     wxEmptyString,
 108                     _T("PNG image (from fallback)"),
 109                     _T("png"), _T("PNG"), wxNullPtr),
 110                     wxFileTypeInfo(_T("image/bmp"),
 111                     wxEmptyString,
 112                     wxEmptyString,
 113                     _T("windows bitmap image (from fallback)"),
 114                     _T("bmp"), _T("BMP"), wxNullPtr),
 115                     wxFileTypeInfo(_T("text/html"),
 116                     wxEmptyString,
 117                     wxEmptyString,
 118                     _T("HTML document (from fallback)"),
 119                     _T("htm"), _T("html"), _T("HTM"), _T("HTML"), wxNullPtr),
 120                     // must terminate the table with this!
 121                     wxFileTypeInfo()
 122             };
 123             wxTheMimeTypesManager->AddFallbacks(fallbacks);
 124             s_MinimalMimeEnsured = true;
 125         }
 126
 127         wxFileType *ft = wxTheMimeTypesManager->GetFileTypeFromExtension(ext);
 128         if ( !ft || !ft -> GetMimeType(&mime) )
 129         {
 130             mime = wxEmptyString;
 131         }
 132
 133         delete ft;
 134
 135         return mime;
 136     }
 137     else
 138 #endif
 139     {
 140         if ( ext.IsSameAs(wxT("htm"), false) || ext.IsSameAs(_T("html"), false) )
 141             return wxT("text/html");
 142         if ( ext.IsSameAs(wxT("jpg"), false) || ext.IsSameAs(_T("jpeg"), false) )
 143             return wxT("image/jpeg");
 144         if ( ext.IsSameAs(wxT("gif"), false) )
 145             return wxT("image/gif");
 146         if ( ext.IsSameAs(wxT("png"), false) )
 147             return wxT("image/png");
 148         if ( ext.IsSameAs(wxT("bmp"), false) )
 149             return wxT("image/bmp");
 150         return wxEmptyString;
 151     }
 152 }
 153
 154
 155
 156 /* static */
 157 wxString wxFileSystemHandler::GetProtocol(const wxString& location)
 158 {
 159     wxString s = wxEmptyString;
 160     int i, l = location.length();
 161     bool fnd = false;
 162
 163     for (i = l-1; (i >= 0) && ((location[i] != wxT('#')) || (!fnd)); i--) {
 164         if ((location[i] == wxT(':')) && (i != 1 /*win: C:\path*/)) fnd = true;
 165     }
 166     if (!fnd) return wxT("file");
 167     for (++i; (i < l) && (location[i] != wxT(':')); i++) s << location[i];
 168     return s;
 169 }
 170
 171
 172 /* static */
 173 wxString wxFileSystemHandler::GetLeftLocation(const wxString& location)
 174 {
 175     int i;
 176     bool fnd = false;
 177
 178     for (i = location.length()-1; i >= 0; i--) {
 179         if ((location[i] == wxT(':')) && (i != 1 /*win: C:\path*/)) fnd = true;
 180         else if (fnd && (location[i] == wxT('#'))) return location.Left(i);
 181     }
 182     return wxEmptyString;
 183 }
 184
 185 /* static */
 186 wxString wxFileSystemHandler::GetRightLocation(const wxString& location)
 187 {
 188     int i, l = location.length();
 189     int l2 = l + 1;
 190
 191     for (i = l-1;
 192          (i >= 0) &&
 193          ((location[i] != wxT(':')) || (i == 1) || (location[i-2] == wxT(':')));
 194          i--)
 195     {
 196         if (location[i] == wxT('#')) l2 = i + 1;
 197     }
 198     if (i == 0) return wxEmptyString;
 199     else return location.Mid(i + 1, l2 - i - 2);
 200 }
 201
 202 /* static */
 203 wxString wxFileSystemHandler::GetAnchor(const wxString& location)
 204 {
 205     wxChar c;
 206     int l = location.length();
 207
 208     for (int i = l-1; i >= 0; i--) {
 209         c = location[i];
 210         if (c == wxT('#'))
 211             return location.Right(l-i-1);
 212         else if ((c == wxT('/')) || (c == wxT('\\')) || (c == wxT(':')))
 213             return wxEmptyString;
 214     }
 215     return wxEmptyString;
 216 }
 217
 218
 219 wxString wxFileSystemHandler::FindFirst(const wxString& WXUNUSED(spec),
 220                                         int WXUNUSED(flags))
 221 {
 222     return wxEmptyString;
 223 }
 224
 225 wxString wxFileSystemHandler::FindNext()
 226 {
 227     return wxEmptyString;
 228 }
 229
 230 //--------------------------------------------------------------------------------
 231 // wxLocalFSHandler
 232 //--------------------------------------------------------------------------------
 233
 234
 235 wxString wxLocalFSHandler::ms_root;
 236
 237 bool wxLocalFSHandler::CanOpen(const wxString& location)
 238 {
 239     return GetProtocol(location) == wxT("file");
 240 }
 241
 242 wxFSFile* wxLocalFSHandler::OpenFile(wxFileSystem& WXUNUSED(fs), const wxString& location)
 243 {
 244     // location has Unix path separators
 245     wxString right = GetRightLocation(location);
 246     wxFileName fn = wxFileSystem::URLToFileName(right);
 247     wxString fullpath = ms_root + fn.GetFullPath();
 248
 249     if (!wxFileExists(fullpath))
 250         return (wxFSFile*) NULL;
 251
 252     // we need to check whether we can really read from this file, otherwise
 253     // wxFSFile is not going to work
 254 #if wxUSE_FFILE
 255     wxFFileInputStream *is = new wxFFileInputStream(fullpath);
 256 #elif wxUSE_FILE
 257     wxFileInputStream *is = new wxFileInputStream(fullpath);
 258 #else
 259 #error One of wxUSE_FILE or wxUSE_FFILE must be set to 1 for wxFSHandler to work
 260 #endif
 261     if ( !is->Ok() )
 262     {
 263         delete is;
 264         return (wxFSFile*) NULL;
 265     }
 266
 267     return new wxFSFile(is,
 268                         right,
 269                         wxEmptyString,
 270                         GetAnchor(location)
 271 #if wxUSE_DATETIME
 272                         ,wxDateTime(wxFileModificationTime(fullpath))
 273 #endif // wxUSE_DATETIME
 274                         );
 275 }
 276
 277 wxString wxLocalFSHandler::FindFirst(const wxString& spec, int flags)
 278 {
 279     wxFileName fn = wxFileSystem::URLToFileName(GetRightLocation(spec));
 280     return wxFindFirstFile(ms_root + fn.GetFullPath(), flags);
 281 }
 282
 283 wxString wxLocalFSHandler::FindNext()
 284 {
 285     return wxFindNextFile();
 286 }
 287
 288
 289
 290 //-----------------------------------------------------------------------------
 291 // wxFileSystem
 292 //-----------------------------------------------------------------------------
 293
 294 IMPLEMENT_DYNAMIC_CLASS(wxFileSystem, wxObject)
 295 IMPLEMENT_ABSTRACT_CLASS(wxFSFile, wxObject)
 296
 297
 298 wxList wxFileSystem::m_Handlers;
 299
 300
 301 wxFileSystem::~wxFileSystem()
 302 {
 303     WX_CLEAR_HASH_MAP(wxFSHandlerHash, m_LocalHandlers)
 304 }
 305
 306
 307 static wxString MakeCorrectPath(const wxString& path)
 308 {
 309     wxString p(path);
 310     wxString r;
 311     int i, j, cnt;
 312
 313     cnt = p.length();
 314     for (i = 0; i < cnt; i++)
 315       if (p.GetChar(i) == wxT('\\')) p.GetWritableChar(i) = wxT('/'); // Want to be windows-safe
 316
 317     if (p.Left(2) == wxT("./")) { p = p.Mid(2); cnt -= 2; }
 318
 319     if (cnt < 3) return p;
 320
 321     r << p.GetChar(0) << p.GetChar(1);
 322
 323     // skip trailing ../.., if any
 324     for (i = 2; i < cnt && (p.GetChar(i) == wxT('/') || p.GetChar(i) == wxT('.')); i++) r << p.GetChar(i);
 325
 326     // remove back references: translate dir1/../dir2 to dir2
 327     for (; i < cnt; i++)
 328     {
 329         r << p.GetChar(i);
 330         if (p.GetChar(i) == wxT('/') && p.GetChar(i-1) == wxT('.') && p.GetChar(i-2) == wxT('.'))
 331         {
 332             for (j = r.length() - 2; j >= 0 && r.GetChar(j) != wxT('/') && r.GetChar(j) != wxT(':'); j--) {}
 333             if (j >= 0 && r.GetChar(j) != wxT(':'))
 334             {
 335                 for (j = j - 1; j >= 0 && r.GetChar(j) != wxT('/') && r.GetChar(j) != wxT(':'); j--) {}
 336                 r.Remove(j + 1);
 337             }
 338         }
 339     }
 340
 341     for (; i < cnt; i++) r << p.GetChar(i);
 342
 343     return r;
 344 }
 345
 346
 347 void wxFileSystem::ChangePathTo(const wxString& location, bool is_dir)
 348 {
 349     int i, pathpos = -1;
 350
 351     m_Path = MakeCorrectPath(location);
 352
 353     if (is_dir)
 354     {
 355         if (m_Path.length() > 0 && m_Path.Last() != wxT('/') && m_Path.Last() != wxT(':'))
 356             m_Path << wxT('/');
 357     }
 358
 359     else
 360     {
 361         for (i = m_Path.length()-1; i >= 0; i--)
 362         {
 363             if (m_Path[(unsigned int) i] == wxT('/'))
 364             {
 365                 if ((i > 1) && (m_Path[(unsigned int) (i-1)] == wxT('/')) && (m_Path[(unsigned int) (i-2)] == wxT(':')))
 366                 {
 367                     i -= 2;
 368                     continue;
 369                 }
 370                 else
 371                 {
 372                     pathpos = i;
 373                     break;
 374                 }
 375             }
 376             else if (m_Path[(unsigned int) i] == wxT(':')) {
 377                 pathpos = i;
 378                 break;
 379             }
 380         }
 381         if (pathpos == -1)
 382         {
 383             for (i = 0; i < (int) m_Path.length(); i++)
 384             {
 385                 if (m_Path[(unsigned int) i] == wxT(':'))
 386                 {
 387                     m_Path.Remove(i+1);
 388                     break;
 389                 }
 390             }
 391             if (i == (int) m_Path.length())
 392                 m_Path = wxEmptyString;
 393         }
 394         else
 395         {
 396             m_Path.Remove(pathpos+1);
 397         }
 398     }
 399 }
 400
 401
 402
 403 wxFileSystemHandler *wxFileSystem::MakeLocal(wxFileSystemHandler *h)
 404 {
 405     wxClassInfo *classinfo = h->GetClassInfo();
 406
 407     if (classinfo->IsDynamic())
 408     {
 409         wxFileSystemHandler*& local = m_LocalHandlers[classinfo];
 410         if (!local)
 411             local = (wxFileSystemHandler*)classinfo->CreateObject();
 412         return local;
 413     }
 414     else
 415     {
 416         return h;
 417     }
 418 }
 419
 420
 421
 422 wxFSFile* wxFileSystem::OpenFile(const wxString& location, int flags)
 423 {
 424     if ((flags & wxFS_READ) == 0)
 425         return NULL;
 426
 427     wxString loc = MakeCorrectPath(location);
 428     unsigned i, ln;
 429     wxChar meta;
 430     wxFSFile *s = NULL;
 431     wxList::compatibility_iterator node;
 432
 433     ln = loc.length();
 434     meta = 0;
 435     for (i = 0; i < ln; i++)
 436     {
 437         switch ( loc[i].GetValue() )
 438         {
 439             case wxT('/') : case wxT(':') : case wxT('#') :
 440                 meta = loc[i];
 441                 break;
 442         }
 443         if (meta != 0) break;
 444     }
 445     m_LastName = wxEmptyString;
 446
 447     // try relative paths first :
 448     if (meta != wxT(':'))
 449     {
 450         node = m_Handlers.GetFirst();
 451         while (node)
 452         {
 453             wxFileSystemHandler *h = (wxFileSystemHandler*) node -> GetData();
 454             if (h->CanOpen(m_Path + loc))
 455             {
 456                 s = MakeLocal(h)->OpenFile(*this, m_Path + loc);
 457                 if (s) { m_LastName = m_Path + loc; break; }
 458             }
 459             node = node->GetNext();
 460         }
 461     }
 462
 463     // if failed, try absolute paths :
 464     if (s == NULL)
 465     {
 466         node = m_Handlers.GetFirst();
 467         while (node)
 468         {
 469             wxFileSystemHandler *h = (wxFileSystemHandler*) node->GetData();
 470             if (h->CanOpen(loc))
 471             {
 472                 s = MakeLocal(h)->OpenFile(*this, loc);
 473                 if (s) { m_LastName = loc; break; }
 474             }
 475             node = node->GetNext();
 476         }
 477     }
 478
 479     if (s && (flags & wxFS_SEEKABLE) != 0 && !s->GetStream()->IsSeekable())
 480     {
 481         wxBackedInputStream *stream;
 482         stream = new wxBackedInputStream(s->DetachStream());
 483         stream->FindLength();
 484         s->SetStream(stream);
 485     }
 486
 487     return (s);
 488 }
 489
 490
 491
 492 wxString wxFileSystem::FindFirst(const wxString& spec, int flags)
 493 {
 494     wxList::compatibility_iterator node;
 495     wxString spec2(spec);
 496
 497     m_FindFileHandler = NULL;
 498
 499     for (int i = spec2.length()-1; i >= 0; i--)
 500         if (spec2[(unsigned int) i] == wxT('\\')) spec2.GetWritableChar(i) = wxT('/'); // Want to be windows-safe
 501
 502     node = m_Handlers.GetFirst();
 503     while (node)
 504     {
 505         wxFileSystemHandler *h = (wxFileSystemHandler*) node -> GetData();
 506         if (h -> CanOpen(m_Path + spec2))
 507         {
 508             m_FindFileHandler = MakeLocal(h);
 509             return m_FindFileHandler -> FindFirst(m_Path + spec2, flags);
 510         }
 511         node = node->GetNext();
 512     }
 513
 514     node = m_Handlers.GetFirst();
 515     while (node)
 516     {
 517         wxFileSystemHandler *h = (wxFileSystemHandler*) node -> GetData();
 518         if (h -> CanOpen(spec2))
 519         {
 520             m_FindFileHandler = MakeLocal(h);
 521             return m_FindFileHandler -> FindFirst(spec2, flags);
 522         }
 523         node = node->GetNext();
 524     }
 525
 526     return wxEmptyString;
 527 }
 528
 529
 530
 531 wxString wxFileSystem::FindNext()
 532 {
 533     if (m_FindFileHandler == NULL) return wxEmptyString;
 534     else return m_FindFileHandler -> FindNext();
 535 }
 536
 537 bool wxFileSystem::FindFileInPath(wxString *pStr,
 538                                   const wxString& path,
 539                                   const wxString& basename)
 540 {
 541     // we assume that it's not empty
 542     wxCHECK_MSG( !basename.empty(), false,
 543                 _T("empty file name in wxFileSystem::FindFileInPath"));
 544
 545     wxString name;
 546     // skip path separator in the beginning of the file name if present
 547     if ( wxIsPathSeparator(basename[0u]) )
 548         name = basename.substr(1);
 549     else
 550         name = basename;
 551
 552     wxStringTokenizer tokenizer(path, wxPATH_SEP);
 553     while ( tokenizer.HasMoreTokens() )
 554     {
 555         wxString strFile = tokenizer.GetNextToken();
 556         if ( !wxEndsWithPathSeparator(strFile) )
 557             strFile += wxFILE_SEP_PATH;
 558         strFile += name;
 559
 560         wxFSFile *file = OpenFile(strFile);
 561         if ( file )
 562         {
 563             delete file;
 564             *pStr = strFile;
 565             return true;
 566         }
 567     }
 568
 569     return false;
 570 }
 571
 572 void wxFileSystem::AddHandler(wxFileSystemHandler *handler)
 573 {
 574     // prepend the handler to the beginning of the list because handlers added
 575     // last should have the highest priority to allow overriding them
 576     m_Handlers.Insert((size_t)0, handler);
 577 }
 578
 579 wxFileSystemHandler* wxFileSystem::RemoveHandler(wxFileSystemHandler *handler)
 580 {
 581     // if handler has already been removed (or deleted)
 582     // we return NULL. This is by design in case
 583     // CleanUpHandlers() is called before RemoveHandler
 584     // is called, as we cannot control the order
 585     // which modules are unloaded
 586     if (!m_Handlers.DeleteObject(handler))
 587         return NULL;
 588
 589     return handler;
 590 }
 591
 592
 593 bool wxFileSystem::HasHandlerForPath(const wxString &location)
 594 {
 595     for ( wxList::compatibility_iterator node = m_Handlers.GetFirst();
 596            node; node = node->GetNext() )
 597     {
 598         wxFileSystemHandler *h = (wxFileSystemHandler*) node->GetData();
 599         if (h->CanOpen(location))
 600             return true;
 601     }
 602
 603     return false;
 604 }
 605
 606 void wxFileSystem::CleanUpHandlers()
 607 {
 608     WX_CLEAR_LIST(wxList, m_Handlers);
 609 }
 610
 611 static const wxString g_unixPathString(wxT("/"));
 612 static const wxString g_nativePathString(wxFILE_SEP_PATH);
 613
 614 // Returns the native path for a file URL
 615 wxFileName wxFileSystem::URLToFileName(const wxString& url)
 616 {
 617     wxString path = url;
 618
 619     if ( path.Find(wxT("file://")) == 0 )
 620     {
 621         path = path.Mid(7);
 622     }
 623     else if ( path.Find(wxT("file:")) == 0 )
 624     {
 625         path = path.Mid(5);
 626     }
 627     // Remove preceding double slash on Mac Classic
 628 #if defined(__WXMAC__) && !defined(__UNIX__)
 629     else if ( path.Find(wxT("//")) == 0 )
 630         path = path.Mid(2);
 631 #endif
 632
 633     path = wxURI::Unescape(path);
 634
 635 #ifdef __WXMSW__
 636     // file urls either start with a forward slash (local harddisk),
 637     // otherwise they have a servername/sharename notation,
 638     // which only exists on msw and corresponds to a unc
 639     if ( path[0u] == wxT('/') && path [1u] != wxT('/'))
 640     {
 641         path = path.Mid(1);
 642     }
 643     else if ( (url.Find(wxT("file://")) == 0) &&
 644               (path.Find(wxT('/')) != wxNOT_FOUND) &&
 645               (path.length() > 1) && (path[1u] != wxT(':')) )
 646     {
 647         path = wxT("//") + path;
 648     }
 649 #endif
 650
 651     path.Replace(g_unixPathString, g_nativePathString);
 652
 653     return wxFileName(path, wxPATH_NATIVE);
 654 }
 655
 656 // Returns the file URL for a native path
 657 wxString wxFileSystem::FileNameToURL(const wxFileName& filename)
 658 {
 659     wxFileName fn = filename;
 660     fn.Normalize(wxPATH_NORM_DOTS | wxPATH_NORM_TILDE | wxPATH_NORM_ABSOLUTE);
 661     wxString url = fn.GetFullPath(wxPATH_NATIVE);
 662
 663 #ifndef __UNIX__
 664     // unc notation, wxMSW
 665     if ( url.Find(wxT("\\\\")) == 0 )
 666     {
 667         url = wxT("//") + url.Mid(2);
 668     }
 669     else
 670     {
 671         url = wxT("/") + url;
 672 #ifdef __WXMAC__
 673         url = wxT("/") + url;
 674 #endif
 675
 676     }
 677 #endif
 678
 679     url.Replace(g_nativePathString, g_unixPathString);
 680     url.Replace(wxT("%"), wxT("%25")); // '%'s must be replaced first!
 681     url.Replace(wxT("#"), wxT("%23"));
 682
 683     // notice that all colons *must* be encoded in the paths used by
 684     // wxFileSystem even though this makes URLs produced by this method
 685     // unusable with IE under Windows as it requires "file:///c:/foo.bar" and
 686     // doesn't accept "file:///c%3a/foo.bar" -- but then we never made any
 687     // guarantees about general suitability of the strings returned by this
 688     // method, they must work with wxFileSystem only and not encoding the colon
 689     // breaks handling of "http://wherever/whatever.zip#zip:filename.ext" URLs
 690     // so we really can't do this without heavy changes to the parsing code
 691     // here, in particular in GetRightLocation()
 692     url.Replace(wxT(":"), wxT("%3A"));
 693     url = wxT("file:") + url;
 694     return url;
 695 }
 696
 697
 698 ///// Module:
 699
 700 class wxFileSystemModule : public wxModule
 701 {
 702     DECLARE_DYNAMIC_CLASS(wxFileSystemModule)
 703
 704     public:
 705         wxFileSystemModule() :
 706             wxModule(),
 707             m_handler(NULL)
 708         {
 709         }
 710
 711         virtual bool OnInit()
 712         {
 713             m_handler = new wxLocalFSHandler;
 714             wxFileSystem::AddHandler(m_handler);
 715             return true;
 716         }
 717         virtual void OnExit()
 718         {
 719             delete wxFileSystem::RemoveHandler(m_handler);
 720
 721             wxFileSystem::CleanUpHandlers();
 722         }
 723
 724     private:
 725         wxFileSystemHandler* m_handler;
 726
 727 };
 728
 729 IMPLEMENT_DYNAMIC_CLASS(wxFileSystemModule, wxModule)
 730
 731 #endif
 732   // wxUSE_FILESYSTEM