src/common/filesys.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        filesys.cpp
   3 // Purpose:     wxFileSystem class - interface for opening files
   4 // Author:      Vaclav Slavik
   5 // Copyright:   (c) 1999 Vaclav Slavik
   6 // Licence:     wxWindows Licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 #ifdef __GNUG__
  10 #pragma implementation
  11 #endif
  12
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORDLANDC__
  16 #pragma hdrstop
  17 #endif
  18
  19 #if !wxUSE_SOCKETS
  20     #undef wxUSE_FS_INET
  21     #define wxUSE_FS_INET 0
  22 #endif
  23
  24 #if (wxUSE_FS_INET || wxUSE_FS_ZIP) && wxUSE_STREAMS
  25
  26 #include "wx/wfstream.h"
  27 #include "wx/module.h"
  28 #include "wx/filesys.h"
  29
  30 //--------------------------------------------------------------------------------
  31 // wxFileSystemHandler
  32 //--------------------------------------------------------------------------------
  33
  34 IMPLEMENT_ABSTRACT_CLASS(wxFileSystemHandler, wxObject)
  35
  36 wxMimeTypesManager *wxFileSystemHandler::m_MimeMng = NULL;
  37
  38 void wxFileSystemHandler::CleanUpStatics()
  39 {
  40     if (m_MimeMng) delete m_MimeMng;
  41     m_MimeMng = NULL;
  42 }
  43
  44
  45 wxString wxFileSystemHandler::GetMimeTypeFromExt(const wxString& location)
  46 {
  47     wxString ext = wxEmptyString, mime = wxEmptyString;
  48     wxString loc = GetRightLocation(location);
  49     char c;
  50     int l = loc.Length(), l2;
  51     wxFileType *ft;
  52
  53     l2 = l;
  54     for (int i = l-1; i >= 0; i--) {
  55         c = loc[(unsigned int) i];
  56         if (c == wxT('#')) l2 = i + 1;
  57         if (c == wxT('.')) {ext = loc.Right(l2-i-1); break;}
  58         if ((c == wxT('/')) || (c == wxT('\\')) || (c == wxT(':'))) {return wxEmptyString;}
  59     }
  60
  61     if (m_MimeMng == NULL) {
  62         m_MimeMng = new wxMimeTypesManager;
  63
  64         static const wxFileTypeInfo fallbacks[] =
  65         {
  66             wxFileTypeInfo("image/jpeg",
  67                            "",
  68                            "",
  69                            "JPEG image (from fallback)",
  70                            "jpg", "jpeg", NULL),
  71             wxFileTypeInfo("image/gif",
  72                            "",
  73                            "",
  74                            "GIF image (from fallback)",
  75                            "gif", NULL),
  76             wxFileTypeInfo("image/png",
  77                            "",
  78                            "",
  79                            "PNG image (from fallback)",
  80                            "png", NULL),
  81             wxFileTypeInfo("image/bmp",
  82                            "",
  83                            "",
  84                            "windows bitmap image (from fallback)",
  85                            "bmp", NULL),
  86             wxFileTypeInfo("text/html",
  87                            "",
  88                            "",
  89                            "HTML document (from fallback)",
  90                            "htm", "html", NULL),
  91
  92             // must terminate the table with this!
  93             wxFileTypeInfo()
  94         };
  95
  96         m_MimeMng -> AddFallbacks(fallbacks);
  97     }
  98
  99     ft = m_MimeMng -> GetFileTypeFromExtension(ext);
 100     if (ft && (ft -> GetMimeType(&mime))) {
 101         delete ft;
 102         return mime;
 103     }
 104     else {
 105         delete ft;
 106         return wxEmptyString;
 107     }
 108 }
 109
 110
 111
 112 wxString wxFileSystemHandler::GetProtocol(const wxString& location) const
 113 {
 114     wxString s = wxEmptyString;
 115     int i, l = location.Length();
 116     bool fnd;
 117
 118     fnd = FALSE;
 119     for (i = l-1; (i >= 0) && ((location[i] != wxT('#')) || (!fnd)); i--) {
 120         if ((location[i] == wxT(':')) && (i != 1 /*win: C:\path*/)) fnd = TRUE;
 121     }
 122     if (!fnd) return wxT("file");
 123     for (++i; (i < l) && (location[i] != wxT(':')); i++) s << location[i];
 124     return s;
 125 }
 126
 127
 128 wxString wxFileSystemHandler::GetLeftLocation(const wxString& location) const
 129 {
 130     int i;
 131     bool fnd;
 132
 133     fnd = FALSE;
 134     for (i = location.Length()-1; i >= 0; i--) {
 135         if ((location[i] == wxT(':')) && (i != 1 /*win: C:\path*/)) fnd = TRUE;
 136         else if (fnd && (location[i] == wxT('#'))) return location.Left(i);
 137     }
 138     return wxEmptyString;
 139 }
 140
 141 wxString wxFileSystemHandler::GetRightLocation(const wxString& location) const
 142 {
 143     int i, l = location.Length();
 144     int l2 = l + 1;
 145     for (i = l-1; (i >= 0) && ((location[i] != wxT(':')) || (i == 1) || (location[i-2] == wxT(':'))); i--) {if (location[i] == wxT('#')) l2 = i + 1;}
 146     if (i == 0) return wxEmptyString;
 147     else return location.Mid(i + 1, l2 - i - 2);
 148 }
 149
 150 wxString wxFileSystemHandler::GetAnchor(const wxString& location) const
 151 {
 152     char c;
 153     int l = location.Length();
 154
 155     for (int i = l-1; i >= 0; i--) {
 156         c = location[i];
 157         if (c == wxT('#')) return location.Right(l-i-1);
 158         else if ((c == wxT('.')) || (c == wxT('/')) || (c == wxT('\\')) || (c == wxT(':'))) return wxEmptyString;
 159     }
 160     return wxEmptyString;
 161 }
 162
 163
 164 wxString wxFileSystemHandler::FindFirst(const wxString& spec, int flags)  { return wxEmptyString; }
 165
 166 wxString wxFileSystemHandler::FindNext() { return wxEmptyString; }
 167
 168
 169
 170 //--------------------------------------------------------------------------------
 171 // wxLocalFSHandler
 172 //--------------------------------------------------------------------------------
 173
 174 class wxLocalFSHandler : public wxFileSystemHandler
 175 {
 176     public:
 177         virtual bool CanOpen(const wxString& location);
 178         virtual wxFSFile* OpenFile(wxFileSystem& fs, const wxString& location);
 179         virtual wxString FindFirst(const wxString& spec, int flags = 0);
 180         virtual wxString FindNext();
 181 };
 182
 183
 184 bool wxLocalFSHandler::CanOpen(const wxString& location)
 185 {
 186     return GetProtocol(location) == wxT("file");
 187 }
 188
 189 wxFSFile* wxLocalFSHandler::OpenFile(wxFileSystem& WXUNUSED(fs), const wxString& location)
 190 {
 191     wxString right = GetRightLocation(location);
 192     if (wxFileExists(right))
 193         return new wxFSFile(new wxFileInputStream(right),
 194                             right,
 195                             GetMimeTypeFromExt(location),
 196                             GetAnchor(location));
 197     else return (wxFSFile*) NULL;
 198 }
 199
 200 wxString wxLocalFSHandler::FindFirst(const wxString& spec, int flags)
 201 {
 202     wxString right = GetRightLocation(spec);
 203     return wxFindFirstFile(right, flags);
 204 }
 205
 206 wxString wxLocalFSHandler::FindNext()
 207 {
 208     return wxFindNextFile();
 209 }
 210
 211
 212
 213 //-----------------------------------------------------------------------------
 214 // wxFileSystem
 215 //-----------------------------------------------------------------------------
 216
 217 IMPLEMENT_DYNAMIC_CLASS(wxFileSystem, wxObject)
 218
 219
 220 wxList wxFileSystem::m_Handlers;
 221
 222
 223
 224 void wxFileSystem::ChangePathTo(const wxString& location, bool is_dir)
 225 {
 226     int i, pathpos = -1;
 227     m_Path = location;
 228
 229     for (i = m_Path.Length()-1; i >= 0; i--)
 230         if (m_Path[(unsigned int) i] == wxT('\\')) m_Path.GetWritableChar(i) = wxT('/');         // wanna be windows-safe
 231
 232     if (is_dir)
 233     {
 234         if (m_Path.Length() > 0 && m_Path.Last() != wxT('/') && m_Path.Last() != wxT(':'))
 235                 m_Path << wxT('/');
 236     }
 237
 238     else
 239     {
 240         for (i = m_Path.Length()-1; i >= 0; i--)
 241         {
 242             if (m_Path[(unsigned int) i] == wxT('/'))
 243                 {
 244                 if ((i > 1) && (m_Path[(unsigned int) (i-1)] == wxT('/')) && (m_Path[(unsigned int) (i-2)] == wxT(':')))
 245                         {
 246                     i -= 2;
 247                     continue;
 248                 }
 249                 else
 250                         {
 251                     pathpos = i;
 252                     break;
 253                 }
 254             }
 255             else if (m_Path[(unsigned int) i] == wxT(':')) {
 256                 pathpos = i;
 257                 break;
 258             }
 259         }
 260         if (pathpos == -1)
 261         {
 262             for (i = 0; i < (int) m_Path.Length(); i++)
 263             {
 264                 if (m_Path[(unsigned int) i] == wxT(':'))
 265                         {
 266                     m_Path.Remove(i+1);
 267                     break;
 268                 }
 269             }
 270             if (i == (int) m_Path.Length())
 271                 m_Path = wxEmptyString;
 272         }
 273         else
 274         {
 275             m_Path.Remove(pathpos+1);
 276         }
 277     }
 278 }
 279
 280
 281
 282 wxFSFile* wxFileSystem::OpenFile(const wxString& location)
 283 {
 284     wxString loc = location;
 285     int i, ln;
 286     char meta;
 287     wxFSFile *s = NULL;
 288     wxNode *node;
 289
 290     ln = loc.Length();
 291     meta = 0;
 292     for (i = 0; i < ln; i++)
 293     {
 294         if (loc[(unsigned int) i] == wxT('\\')) loc.GetWritableChar(i) = wxT('/');         // wanna be windows-safe
 295         if (!meta)
 296             switch (loc[(unsigned int) i])
 297                 {
 298                 case wxT('/') : case wxT(':') : case wxT('#') : meta = loc[(unsigned int) i];
 299             }
 300     }
 301     m_LastName = wxEmptyString;
 302
 303     // try relative paths first :
 304     if (meta != wxT(':'))
 305     {
 306         node = m_Handlers.GetFirst();
 307         while (node)
 308         {
 309             wxFileSystemHandler *h = (wxFileSystemHandler*) node -> GetData();
 310             if (h->CanOpen(m_Path + location))
 311                 {
 312                 s = h->OpenFile(*this, m_Path + location);
 313                 if (s) { m_LastName = m_Path + location; break; }
 314             }
 315             node = node->GetNext();
 316         }
 317     }
 318
 319     // if failed, try absolute paths :
 320     if (s == NULL)
 321     {
 322         node = m_Handlers.GetFirst();
 323         while (node)
 324         {
 325             wxFileSystemHandler *h = (wxFileSystemHandler*) node->GetData();
 326             if (h->CanOpen(location))
 327             {
 328                 s = h->OpenFile(*this, location);
 329                 if (s) { m_LastName = location; break; }
 330             }
 331             node = node->GetNext();
 332         }
 333     }
 334     return (s);
 335 }
 336
 337
 338
 339 wxString wxFileSystem::FindFirst(const wxString& spec, int flags)
 340 {
 341     wxNode *node;
 342     wxString spec2(spec);
 343
 344     m_FindFileHandler = NULL;
 345
 346     for (int i = spec2.Length()-1; i >= 0; i--)
 347         if (spec2[(unsigned int) i] == wxT('\\')) spec2.GetWritableChar(i) = wxT('/'); // wanna be windows-safe
 348
 349     node = m_Handlers.GetFirst();
 350     while (node)
 351     {
 352         m_FindFileHandler = (wxFileSystemHandler*) node -> GetData();
 353         if (m_FindFileHandler -> CanOpen(m_Path + spec2))
 354             return m_FindFileHandler -> FindFirst(m_Path + spec2, flags);
 355         node = node->GetNext();
 356     }
 357
 358     node = m_Handlers.GetFirst();
 359     while (node)
 360     {
 361         m_FindFileHandler = (wxFileSystemHandler*) node -> GetData();
 362         if (m_FindFileHandler -> CanOpen(spec2))
 363             return m_FindFileHandler -> FindFirst(spec2, flags);
 364         node = node->GetNext();
 365     }
 366
 367     return wxEmptyString;
 368 }
 369
 370
 371
 372 wxString wxFileSystem::FindNext()
 373 {
 374     if (m_FindFileHandler == NULL) return wxEmptyString;
 375     else return m_FindFileHandler -> FindNext();
 376 }
 377
 378
 379
 380 void wxFileSystem::AddHandler(wxFileSystemHandler *handler)
 381 {
 382     m_Handlers.Append(handler);
 383 }
 384
 385
 386 void wxFileSystem::CleanUpHandlers()
 387 {
 388     m_Handlers.DeleteContents(TRUE);
 389     m_Handlers.Clear();
 390 }
 391
 392
 393
 394
 395 ///// Module:
 396
 397 class wxFileSystemModule : public wxModule
 398 {
 399     DECLARE_DYNAMIC_CLASS(wxFileSystemModule)
 400
 401     public:
 402         virtual bool OnInit()
 403         {
 404             wxFileSystem::AddHandler(new wxLocalFSHandler);
 405             return TRUE;
 406         }
 407         virtual void OnExit()
 408         {
 409             wxFileSystemHandler::CleanUpStatics();
 410             wxFileSystem::CleanUpHandlers();
 411         }
 412 };
 413
 414 IMPLEMENT_DYNAMIC_CLASS(wxFileSystemModule, wxModule)
 415
 416 #endif
 417   // (wxUSE_FS_INET || wxUSE_FS_ZIP) && wxUSE_STREAMS
 418
 419
 420