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 // Licence:     wxWindows licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 #include "wx/wxprec.h"
  10
  11 #ifdef __BORLANDC__
  12     #pragma hdrstop
  13 #endif
  14
  15 #if wxUSE_FILESYSTEM
  16
  17 #include "wx/fs_filter.h"
  18
  19 #ifndef WX_PRECOMP
  20 #endif
  21
  22 #include "wx/scopedptr.h"
  23
  24 wxDEFINE_SCOPED_PTR_TYPE(wxFSFile)
  25 wxDEFINE_SCOPED_PTR_TYPE(wxInputStream)
  26
  27 //----------------------------------------------------------------------------
  28 // wxFilterFSHandler
  29 //----------------------------------------------------------------------------
  30
  31 bool wxFilterFSHandler::CanOpen(const wxString& location)
  32 {
  33     return wxFilterClassFactory::Find(GetProtocol(location)) != NULL;
  34 }
  35
  36 wxFSFile* wxFilterFSHandler::OpenFile(
  37         wxFileSystem& fs,
  38         const wxString& location)
  39 {
  40     wxString right = GetRightLocation(location);
  41     if (!right.empty())
  42         return NULL;
  43
  44     wxString protocol = GetProtocol(location);
  45     const wxFilterClassFactory *factory = wxFilterClassFactory::Find(protocol);
  46     if (!factory)
  47         return NULL;
  48
  49     wxString left = GetLeftLocation(location);
  50     wxFSFilePtr leftFile(fs.OpenFile(left));
  51     if (!leftFile.get())
  52         return NULL;
  53
  54     wxInputStreamPtr leftStream(leftFile->DetachStream());
  55     if (!leftStream.get() || !leftStream->IsOk())
  56         return NULL;
  57
  58     wxInputStreamPtr stream(factory->NewStream(leftStream.release()));
  59
  60     // The way compressed streams are supposed to be served is e.g.:
  61     //  Content-type: application/postscript
  62     //  Content-encoding: gzip
  63     // So the mime type should be just the mime type of the lhs. However check
  64     // whether the mime type is that of this compression format (e.g.
  65     // application/gzip). If so pop any extension and try GetMimeTypeFromExt,
  66     // e.g. if it were '.ps.gz' pop the '.gz' and try looking up '.ps'
  67     wxString mime = leftFile->GetMimeType();
  68     if (factory->CanHandle(mime, wxSTREAM_MIMETYPE))
  69         mime = GetMimeTypeFromExt(factory->PopExtension(left));
  70
  71     return new wxFSFile(stream.release(),
  72                         left + wxT("#") + protocol + wxT(":") + right,
  73                         mime,
  74                         GetAnchor(location)
  75 #if wxUSE_DATETIME
  76                         , leftFile->GetModificationTime()
  77 #endif // wxUSE_DATETIME
  78                        );
  79 }
  80
  81 wxString wxFilterFSHandler::FindFirst(const wxString& WXUNUSED(spec), int WXUNUSED(flags))
  82 {
  83     return wxEmptyString;
  84 }
  85
  86 wxString wxFilterFSHandler::FindNext()
  87 {
  88     return wxEmptyString;
  89 }
  90
  91 #endif //wxUSE_FILESYSTEM