src/common/fs_filter.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/fs_filter.cpp
   3 // Purpose:     wxFilter file system handler
   4 // Author:      Mike Wetherell
   5 // Copyright:   (c) 2006 Mike Wetherell
   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 #if wxUSE_FILESYSTEM
  17
  18 #include "wx/fs_filter.h"
  19
  20 #ifndef WX_PRECOMP
  21 #endif
  22
  23 #include "wx/ptr_scpd.h"
  24
  25 wxDEFINE_SCOPED_PTR_TYPE(wxFSFile)
  26 wxDEFINE_SCOPED_PTR_TYPE(wxInputStream)
  27
  28 //----------------------------------------------------------------------------
  29 // wxFilterFSHandler
  30 //----------------------------------------------------------------------------
  31
  32 bool wxFilterFSHandler::CanOpen(const wxString& location)
  33 {
  34     return wxFilterClassFactory::Find(GetProtocol(location)) != NULL;
  35 }
  36
  37 wxFSFile* wxFilterFSHandler::OpenFile(
  38         wxFileSystem& fs,
  39         const wxString& location)
  40 {
  41     wxString right = GetRightLocation(location);
  42     if (!right.empty())
  43         return NULL;
  44
  45     wxString protocol = GetProtocol(location);
  46     const wxFilterClassFactory *factory = wxFilterClassFactory::Find(protocol);
  47     if (!factory)
  48         return NULL;
  49
  50     wxString left = GetLeftLocation(location);
  51     wxFSFilePtr leftFile(fs.OpenFile(left));
  52     if (!leftFile.get())
  53         return NULL;
  54
  55     wxInputStreamPtr leftStream(leftFile->DetachStream());
  56     if (!leftStream.get() || !leftStream->IsOk())
  57         return NULL;
  58
  59     wxInputStreamPtr stream(factory->NewStream(leftStream.release()));
  60
  61     // The way compressed streams are supposed to be served is e.g.:
  62     //  Content-type: application/postscript
  63     //  Content-encoding: gzip
  64     // So the mime type should be just the mime type of the lhs. However check
  65     // whether the mime type is that of this compression format (e.g.
  66     // application/gzip). If so pop any extension and try GetMimeTypeFromExt,
  67     // e.g. if it were '.ps.gz' pop the '.gz' and try looking up '.ps'
  68     wxString mime = leftFile->GetMimeType();
  69     if (factory->CanHandle(mime, wxSTREAM_MIMETYPE))
  70         mime = GetMimeTypeFromExt(factory->PopExtension(left));
  71
  72     return new wxFSFile(stream.release(),
  73                         left + wxT("#") + protocol + wxT(":") + right,
  74                         mime,
  75                         GetAnchor(location)
  76 #if wxUSE_DATETIME
  77                         , leftFile->GetModificationTime()
  78 #endif // wxUSE_DATETIME
  79                        );
  80 }
  81
  82 wxString wxFilterFSHandler::FindFirst(const wxString& WXUNUSED(spec), int WXUNUSED(flags))
  83 {
  84     return wxEmptyString;
  85 }
  86
  87 wxString wxFilterFSHandler::FindNext()
  88 {
  89     return wxEmptyString;
  90 }
  91
  92 #endif //wxUSE_FILESYSTEM