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))) return mime;
 101     else return wxEmptyString;
 102 }
 103
 104
 105
 106 wxString wxFileSystemHandler::GetProtocol(const wxString& location) const
 107 {
 108     wxString s = wxEmptyString;
 109     int i, l = location.Length();
 110     bool fnd;
 111
 112     fnd = FALSE;
 113     for (i = l-1; (i >= 0) && ((location[i] != wxT('#')) || (!fnd)); i--) {
 114         if ((location[i] == wxT(':')) && (i != 1 /*win: C:\path*/)) fnd = TRUE;
 115     }
 116     if (!fnd) return wxT("file");
 117     for (++i; (i < l) && (location[i] != wxT(':')); i++) s << location[i];
 118     return s;
 119 }
 120
 121
 122 wxString wxFileSystemHandler::GetLeftLocation(const wxString& location) const
 123 {
 124     int i;
 125     bool fnd;
 126
 127     fnd = FALSE;
 128     for (i = location.Length()-1; i >= 0; i--) {
 129         if ((location[i] == wxT(':')) && (i != 1 /*win: C:\path*/)) fnd = TRUE;
 130         else if (fnd && (location[i] == wxT('#'))) return location.Left(i);
 131     }
 132     return wxEmptyString;
 133 }
 134
 135 wxString wxFileSystemHandler::GetRightLocation(const wxString& location) const
 136 {
 137     int i, l = location.Length();
 138     int l2 = l + 1;
 139     for (i = l-1; (i >= 0) && ((location[i] != wxT(':')) || (i == 1) || (location[i-2] == wxT(':'))); i--) {if (location[i] == wxT('#')) l2 = i + 1;}
 140     if (i == 0) return wxEmptyString;
 141     else return location.Mid(i + 1, l2 - i - 2);
 142 }
 143
 144 wxString wxFileSystemHandler::GetAnchor(const wxString& location) const
 145 {
 146     char c;
 147     int l = location.Length();
 148
 149     for (int i = l-1; i >= 0; i--) {
 150         c = location[i];
 151         if (c == wxT('#')) return location.Right(l-i-1);
 152         else if ((c == wxT('.')) || (c == wxT('/')) || (c == wxT('\\')) || (c == wxT(':'))) return wxEmptyString;
 153     }
 154     return wxEmptyString;
 155 }
 156
 157
 158 wxString wxFileSystemHandler::FindFirst(const wxString& spec, int flags)  { return wxEmptyString; }
 159
 160 wxString wxFileSystemHandler::FindNext() { return wxEmptyString; }
 161
 162
 163
 164 //--------------------------------------------------------------------------------
 165 // wxLocalFSHandler
 166 //--------------------------------------------------------------------------------
 167
 168 class wxLocalFSHandler : public wxFileSystemHandler
 169 {
 170     public:
 171         virtual bool CanOpen(const wxString& location);
 172         virtual wxFSFile* OpenFile(wxFileSystem& fs, const wxString& location);
 173         virtual wxString FindFirst(const wxString& spec, int flags = 0);
 174         virtual wxString FindNext();
 175 };
 176
 177
 178 bool wxLocalFSHandler::CanOpen(const wxString& location)
 179 {
 180     return GetProtocol(location) == wxT("file");
 181 }
 182
 183 wxFSFile* wxLocalFSHandler::OpenFile(wxFileSystem& WXUNUSED(fs), const wxString& location)
 184 {
 185     wxString right = GetRightLocation(location);
 186     if (wxFileExists(right))
 187         return new wxFSFile(new wxFileInputStream(right),
 188                             right,
 189                             GetMimeTypeFromExt(location),
 190                             GetAnchor(location));
 191     else return (wxFSFile*) NULL;
 192 }
 193
 194 wxString wxLocalFSHandler::FindFirst(const wxString& spec, int flags)
 195 {
 196     wxString right = GetRightLocation(spec);
 197     return wxFindFirstFile(right, flags);
 198 }
 199
 200 wxString wxLocalFSHandler::FindNext()
 201 {
 202     return wxFindNextFile();
 203 }
 204
 205
 206
 207 //-----------------------------------------------------------------------------
 208 // wxFileSystem
 209 //-----------------------------------------------------------------------------
 210
 211 IMPLEMENT_DYNAMIC_CLASS(wxFileSystem, wxObject)
 212
 213
 214 wxList wxFileSystem::m_Handlers;
 215
 216
 217
 218 void wxFileSystem::ChangePathTo(const wxString& location, bool is_dir)
 219 {
 220     int i, pathpos = -1;
 221     m_Path = location;
 222
 223     for (i = m_Path.Length()-1; i >= 0; i--)
 224         if (m_Path[(unsigned int) i] == wxT('\\')) m_Path.GetWritableChar(i) = wxT('/');         // wanna be windows-safe
 225
 226     if (is_dir)
 227     {
 228         if (m_Path.Length() > 0 && m_Path.Last() != wxT('/') && m_Path.Last() != wxT(':'))
 229                 m_Path << wxT('/');
 230     }
 231
 232     else
 233     {
 234         for (i = m_Path.Length()-1; i >= 0; i--)
 235         {
 236             if (m_Path[(unsigned int) i] == wxT('/'))
 237                 {
 238                 if ((i > 1) && (m_Path[(unsigned int) (i-1)] == wxT('/')) && (m_Path[(unsigned int) (i-2)] == wxT(':')))
 239                         {
 240                     i -= 2;
 241                     continue;
 242                 }
 243                 else
 244                         {
 245                     pathpos = i;
 246                     break;
 247                 }
 248             }
 249             else if (m_Path[(unsigned int) i] == wxT(':')) {
 250                 pathpos = i;
 251                 break;
 252             }
 253         }
 254         if (pathpos == -1)
 255         {
 256             for (i = 0; i < (int) m_Path.Length(); i++)
 257             {
 258                 if (m_Path[(unsigned int) i] == wxT(':'))
 259                         {
 260                     m_Path.Remove(i+1);
 261                     break;
 262                 }
 263             }
 264             if (i == (int) m_Path.Length())
 265                 m_Path = wxEmptyString;
 266         }
 267         else
 268         {
 269             m_Path.Remove(pathpos+1);
 270         }
 271     }
 272 }
 273
 274
 275
 276 wxFSFile* wxFileSystem::OpenFile(const wxString& location)
 277 {
 278     wxString loc = location;
 279     int i, ln;
 280     char meta;
 281     wxFSFile *s = NULL;
 282     wxNode *node;
 283
 284     ln = loc.Length();
 285     meta = 0;
 286     for (i = 0; i < ln; i++)
 287     {
 288         if (loc[(unsigned int) i] == wxT('\\')) loc.GetWritableChar(i) = wxT('/');         // wanna be windows-safe
 289         if (!meta)
 290             switch (loc[(unsigned int) i])
 291                 {
 292                 case wxT('/') : case wxT(':') : case wxT('#') : meta = loc[(unsigned int) i];
 293             }
 294     }
 295     m_LastName = wxEmptyString;
 296
 297     // try relative paths first :
 298     if (meta != wxT(':'))
 299     {
 300         node = m_Handlers.GetFirst();
 301         while (node)
 302         {
 303             wxFileSystemHandler *h = (wxFileSystemHandler*) node -> GetData();
 304             if (h->CanOpen(m_Path + location))
 305                 {
 306                 s = h->OpenFile(*this, m_Path + location);
 307                 if (s) { m_LastName = m_Path + location; break; }
 308             }
 309             node = node->GetNext();
 310         }
 311     }
 312
 313     // if failed, try absolute paths :
 314     if (s == NULL)
 315     {
 316         node = m_Handlers.GetFirst();
 317         while (node)
 318         {
 319             wxFileSystemHandler *h = (wxFileSystemHandler*) node->GetData();
 320             if (h->CanOpen(location))
 321             {
 322                 s = h->OpenFile(*this, location);
 323                 if (s) { m_LastName = location; break; }
 324             }
 325             node = node->GetNext();
 326         }
 327     }
 328     return (s);
 329 }
 330
 331
 332
 333 wxString wxFileSystem::FindFirst(const wxString& spec, int flags)
 334 {
 335     wxNode *node;
 336     wxString spec2(spec);
 337
 338     m_FindFileHandler = NULL;
 339
 340     for (int i = spec2.Length()-1; i >= 0; i--)
 341         if (spec2[(unsigned int) i] == wxT('\\')) spec2.GetWritableChar(i) = wxT('/'); // wanna be windows-safe
 342
 343     node = m_Handlers.GetFirst();
 344     while (node)
 345     {
 346         m_FindFileHandler = (wxFileSystemHandler*) node -> GetData();
 347         if (m_FindFileHandler -> CanOpen(m_Path + spec2))
 348             return m_FindFileHandler -> FindFirst(m_Path + spec2, flags);
 349         node = node->GetNext();
 350     }
 351
 352     node = m_Handlers.GetFirst();
 353     while (node)
 354     {
 355         m_FindFileHandler = (wxFileSystemHandler*) node -> GetData();
 356         if (m_FindFileHandler -> CanOpen(spec2))
 357             return m_FindFileHandler -> FindFirst(spec2, flags);
 358         node = node->GetNext();
 359     }
 360
 361     return wxEmptyString;
 362 }
 363
 364
 365
 366 wxString wxFileSystem::FindNext()
 367 {
 368     if (m_FindFileHandler == NULL) return wxEmptyString;
 369     else return m_FindFileHandler -> FindNext();
 370 }
 371
 372
 373
 374 void wxFileSystem::AddHandler(wxFileSystemHandler *handler)
 375 {
 376     m_Handlers.Append(handler);
 377 }
 378
 379
 380 void wxFileSystem::CleanUpHandlers()
 381 {
 382     m_Handlers.DeleteContents(TRUE);
 383     m_Handlers.Clear();
 384 }
 385
 386
 387
 388
 389 ///// Module:
 390
 391 class wxFileSystemModule : public wxModule
 392 {
 393     DECLARE_DYNAMIC_CLASS(wxFileSystemModule)
 394
 395     public:
 396         virtual bool OnInit()
 397         {
 398             wxFileSystem::AddHandler(new wxLocalFSHandler);
 399             return TRUE;
 400         }
 401         virtual void OnExit()
 402         {
 403             wxFileSystemHandler::CleanUpStatics();
 404             wxFileSystem::CleanUpHandlers();
 405         }
 406 };
 407
 408 IMPLEMENT_DYNAMIC_CLASS(wxFileSystemModule, wxModule)
 409
 410 #endif
 411   // (wxUSE_FS_INET || wxUSE_FS_ZIP) && wxUSE_STREAMS
 412
 413
 414