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& WXUNUSED(spec),
 165                                         int WXUNUSED(flags))
 166 {
 167     return wxEmptyString;
 168 }
 169
 170 wxString wxFileSystemHandler::FindNext()
 171 {
 172     return wxEmptyString;
 173 }
 174
 175 //--------------------------------------------------------------------------------
 176 // wxLocalFSHandler
 177 //--------------------------------------------------------------------------------
 178
 179 class wxLocalFSHandler : public wxFileSystemHandler
 180 {
 181     public:
 182         virtual bool CanOpen(const wxString& location);
 183         virtual wxFSFile* OpenFile(wxFileSystem& fs, const wxString& location);
 184         virtual wxString FindFirst(const wxString& spec, int flags = 0);
 185         virtual wxString FindNext();
 186 };
 187
 188
 189 bool wxLocalFSHandler::CanOpen(const wxString& location)
 190 {
 191     return GetProtocol(location) == wxT("file");
 192 }
 193
 194 wxFSFile* wxLocalFSHandler::OpenFile(wxFileSystem& WXUNUSED(fs), const wxString& location)
 195 {
 196     wxString right = GetRightLocation(location);
 197     if (wxFileExists(right))
 198         return new wxFSFile(new wxFileInputStream(right),
 199                             right,
 200                             GetMimeTypeFromExt(location),
 201                             GetAnchor(location));
 202     else return (wxFSFile*) NULL;
 203 }
 204
 205 wxString wxLocalFSHandler::FindFirst(const wxString& spec, int flags)
 206 {
 207     wxString right = GetRightLocation(spec);
 208     return wxFindFirstFile(right, flags);
 209 }
 210
 211 wxString wxLocalFSHandler::FindNext()
 212 {
 213     return wxFindNextFile();
 214 }
 215
 216
 217
 218 //-----------------------------------------------------------------------------
 219 // wxFileSystem
 220 //-----------------------------------------------------------------------------
 221
 222 IMPLEMENT_DYNAMIC_CLASS(wxFileSystem, wxObject)
 223
 224
 225 wxList wxFileSystem::m_Handlers;
 226
 227
 228
 229 void wxFileSystem::ChangePathTo(const wxString& location, bool is_dir)
 230 {
 231     int i, pathpos = -1;
 232     m_Path = location;
 233
 234     for (i = m_Path.Length()-1; i >= 0; i--)
 235         if (m_Path[(unsigned int) i] == wxT('\\')) m_Path.GetWritableChar(i) = wxT('/');         // wanna be windows-safe
 236
 237     if (is_dir)
 238     {
 239         if (m_Path.Length() > 0 && m_Path.Last() != wxT('/') && m_Path.Last() != wxT(':'))
 240                 m_Path << wxT('/');
 241     }
 242
 243     else
 244     {
 245         for (i = m_Path.Length()-1; i >= 0; i--)
 246         {
 247             if (m_Path[(unsigned int) i] == wxT('/'))
 248                 {
 249                 if ((i > 1) && (m_Path[(unsigned int) (i-1)] == wxT('/')) && (m_Path[(unsigned int) (i-2)] == wxT(':')))
 250                         {
 251                     i -= 2;
 252                     continue;
 253                 }
 254                 else
 255                         {
 256                     pathpos = i;
 257                     break;
 258                 }
 259             }
 260             else if (m_Path[(unsigned int) i] == wxT(':')) {
 261                 pathpos = i;
 262                 break;
 263             }
 264         }
 265         if (pathpos == -1)
 266         {
 267             for (i = 0; i < (int) m_Path.Length(); i++)
 268             {
 269                 if (m_Path[(unsigned int) i] == wxT(':'))
 270                         {
 271                     m_Path.Remove(i+1);
 272                     break;
 273                 }
 274             }
 275             if (i == (int) m_Path.Length())
 276                 m_Path = wxEmptyString;
 277         }
 278         else
 279         {
 280             m_Path.Remove(pathpos+1);
 281         }
 282     }
 283 }
 284
 285
 286
 287 wxFSFile* wxFileSystem::OpenFile(const wxString& location)
 288 {
 289     wxString loc = location;
 290     int i, ln;
 291     char meta;
 292     wxFSFile *s = NULL;
 293     wxNode *node;
 294
 295     ln = loc.Length();
 296     meta = 0;
 297     for (i = 0; i < ln; i++)
 298     {
 299         if (loc[(unsigned int) i] == wxT('\\')) loc.GetWritableChar(i) = wxT('/');         // wanna be windows-safe
 300         if (!meta)
 301             switch (loc[(unsigned int) i])
 302                 {
 303                 case wxT('/') : case wxT(':') : case wxT('#') : meta = loc[(unsigned int) i];
 304             }
 305     }
 306     m_LastName = wxEmptyString;
 307
 308     // try relative paths first :
 309     if (meta != wxT(':'))
 310     {
 311         node = m_Handlers.GetFirst();
 312         while (node)
 313         {
 314             wxFileSystemHandler *h = (wxFileSystemHandler*) node -> GetData();
 315             if (h->CanOpen(m_Path + location))
 316                 {
 317                 s = h->OpenFile(*this, m_Path + location);
 318                 if (s) { m_LastName = m_Path + location; break; }
 319             }
 320             node = node->GetNext();
 321         }
 322     }
 323
 324     // if failed, try absolute paths :
 325     if (s == NULL)
 326     {
 327         node = m_Handlers.GetFirst();
 328         while (node)
 329         {
 330             wxFileSystemHandler *h = (wxFileSystemHandler*) node->GetData();
 331             if (h->CanOpen(location))
 332             {
 333                 s = h->OpenFile(*this, location);
 334                 if (s) { m_LastName = location; break; }
 335             }
 336             node = node->GetNext();
 337         }
 338     }
 339     return (s);
 340 }
 341
 342
 343
 344 wxString wxFileSystem::FindFirst(const wxString& spec, int flags)
 345 {
 346     wxNode *node;
 347     wxString spec2(spec);
 348
 349     m_FindFileHandler = NULL;
 350
 351     for (int i = spec2.Length()-1; i >= 0; i--)
 352         if (spec2[(unsigned int) i] == wxT('\\')) spec2.GetWritableChar(i) = wxT('/'); // wanna be windows-safe
 353
 354     node = m_Handlers.GetFirst();
 355     while (node)
 356     {
 357         m_FindFileHandler = (wxFileSystemHandler*) node -> GetData();
 358         if (m_FindFileHandler -> CanOpen(m_Path + spec2))
 359             return m_FindFileHandler -> FindFirst(m_Path + spec2, flags);
 360         node = node->GetNext();
 361     }
 362
 363     node = m_Handlers.GetFirst();
 364     while (node)
 365     {
 366         m_FindFileHandler = (wxFileSystemHandler*) node -> GetData();
 367         if (m_FindFileHandler -> CanOpen(spec2))
 368             return m_FindFileHandler -> FindFirst(spec2, flags);
 369         node = node->GetNext();
 370     }
 371
 372     return wxEmptyString;
 373 }
 374
 375
 376
 377 wxString wxFileSystem::FindNext()
 378 {
 379     if (m_FindFileHandler == NULL) return wxEmptyString;
 380     else return m_FindFileHandler -> FindNext();
 381 }
 382
 383
 384
 385 void wxFileSystem::AddHandler(wxFileSystemHandler *handler)
 386 {
 387     m_Handlers.Append(handler);
 388 }
 389
 390
 391 void wxFileSystem::CleanUpHandlers()
 392 {
 393     m_Handlers.DeleteContents(TRUE);
 394     m_Handlers.Clear();
 395 }
 396
 397
 398
 399
 400 ///// Module:
 401
 402 class wxFileSystemModule : public wxModule
 403 {
 404     DECLARE_DYNAMIC_CLASS(wxFileSystemModule)
 405
 406     public:
 407         virtual bool OnInit()
 408         {
 409             wxFileSystem::AddHandler(new wxLocalFSHandler);
 410             return TRUE;
 411         }
 412         virtual void OnExit()
 413         {
 414             wxFileSystemHandler::CleanUpStatics();
 415             wxFileSystem::CleanUpHandlers();
 416         }
 417 };
 418
 419 IMPLEMENT_DYNAMIC_CLASS(wxFileSystemModule, wxModule)
 420
 421 #endif
 422   // (wxUSE_FS_INET || wxUSE_FS_ZIP) && wxUSE_STREAMS
 423
 424
 425