src/common/dircmn.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/dircmn.cpp
   3 // Purpose:     wxDir methods common to all implementations
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     19.05.01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2001 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // License:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 /* this is done in platform-specific files
  21 #ifdef __GNUG__
  22     #pragma implementation "dir.h"
  23 #endif
  24 */
  25
  26 // For compilers that support precompilation, includes "wx.h".
  27 #include "wx/wxprec.h"
  28
  29 #ifdef __BORLANDC__
  30     #pragma hdrstop
  31 #endif
  32
  33 #ifndef WX_PRECOMP
  34     #include "wx/string.h"
  35     #include "wx/log.h"
  36     #include "wx/intl.h"
  37     #include "wx/filefn.h"
  38 #endif //WX_PRECOMP
  39
  40 #include "wx/dir.h"
  41
  42 // ============================================================================
  43 // implementation
  44 // ============================================================================
  45
  46 // ----------------------------------------------------------------------------
  47 // wxDirTraverser
  48 // ----------------------------------------------------------------------------
  49
  50 wxDirTraverseResult
  51 wxDirTraverser::OnOpenError(const wxString& WXUNUSED(dirname))
  52 {
  53     return wxDIR_IGNORE;
  54 }
  55
  56 // ----------------------------------------------------------------------------
  57 // wxDir::HasFiles() and HasSubDirs()
  58 // ----------------------------------------------------------------------------
  59
  60 // dumb generic implementation
  61
  62 bool wxDir::HasFiles(const wxString& spec)
  63 {
  64     wxString s;
  65     return GetFirst(&s, spec, wxDIR_FILES | wxDIR_HIDDEN);
  66 }
  67
  68 // we have a (much) faster version for Unix
  69 #if (defined(__CYGWIN__) && defined(__WINDOWS__)) || !defined(__UNIX_LIKE__) || defined(__WXMAC__)
  70
  71 bool wxDir::HasSubDirs(const wxString& spec)
  72 {
  73     wxString s;
  74     return GetFirst(&s, spec, wxDIR_DIRS | wxDIR_HIDDEN);
  75 }
  76
  77 #endif // !Unix
  78
  79 // ----------------------------------------------------------------------------
  80 // wxDir::Traverse()
  81 // ----------------------------------------------------------------------------
  82
  83 size_t wxDir::Traverse(wxDirTraverser& sink,
  84                        const wxString& filespec,
  85                        int flags) const
  86 {
  87     wxCHECK_MSG( IsOpened(), (size_t)-1,
  88                  _T("dir must be opened before traversing it") );
  89
  90     // the total number of files found
  91     size_t nFiles = 0;
  92
  93     // the name of this dir with path delimiter at the end
  94     wxString prefix = GetName();
  95     prefix += wxFILE_SEP_PATH;
  96
  97     // first, recurse into subdirs
  98     if ( flags & wxDIR_DIRS )
  99     {
 100         wxString dirname;
 101         for ( bool cont = GetFirst(&dirname, _T(""), wxDIR_DIRS | wxDIR_HIDDEN);
 102               cont;
 103               cont = GetNext(&dirname) )
 104         {
 105             const wxString fulldirname = prefix + dirname;
 106
 107             switch ( sink.OnDir(fulldirname) )
 108             {
 109                 default:
 110                     wxFAIL_MSG(_T("unexpected OnDir() return value") );
 111                     // fall through
 112
 113                 case wxDIR_STOP:
 114                     cont = false;
 115                     break;
 116
 117                 case wxDIR_CONTINUE:
 118                     {
 119                         wxDir subdir;
 120
 121                         // don't give the error messages for the directories
 122                         // which we can't open: there can be all sorts of good
 123                         // reason for this (e.g. insufficient privileges) and
 124                         // this shouldn't be treated as an error -- instead
 125                         // let the user code decide what to do
 126                         bool ok;
 127                         do
 128                         {
 129                             wxLogNull noLog;
 130                             ok = subdir.Open(fulldirname);
 131                             if ( !ok )
 132                             {
 133                                 // ask the user code what to do
 134                                 bool tryagain;
 135                                 switch ( sink.OnOpenError(fulldirname) )
 136                                 {
 137                                     default:
 138                                         wxFAIL_MSG(_T("unexpected OnOpenError() return value") );
 139                                         // fall through
 140
 141                                     case wxDIR_STOP:
 142                                         cont = false;
 143                                         // fall through
 144
 145                                     case wxDIR_IGNORE:
 146                                         tryagain = false;
 147                                         break;
 148
 149                                     case wxDIR_CONTINUE:
 150                                         tryagain = true;
 151                                 }
 152
 153                                 if ( !tryagain )
 154                                     break;
 155                             }
 156                         }
 157                         while ( !ok );
 158
 159                         if ( ok )
 160                         {
 161                             nFiles += subdir.Traverse(sink, filespec, flags);
 162                         }
 163                     }
 164                     break;
 165
 166                 case wxDIR_IGNORE:
 167                     // nothing to do
 168                     ;
 169             }
 170         }
 171     }
 172
 173     // now enum our own files
 174     if ( flags & wxDIR_FILES )
 175     {
 176         flags &= ~wxDIR_DIRS;
 177
 178         wxString filename;
 179         bool cont = GetFirst(&filename, filespec, flags);
 180         while ( cont )
 181         {
 182             wxDirTraverseResult res = sink.OnFile(prefix + filename);
 183             if ( res == wxDIR_STOP )
 184                 break;
 185
 186             wxASSERT_MSG( res == wxDIR_CONTINUE,
 187                           _T("unexpected OnFile() return value") );
 188
 189             nFiles++;
 190
 191             cont = GetNext(&filename);
 192         }
 193     }
 194
 195     return nFiles;
 196 }
 197
 198 // ----------------------------------------------------------------------------
 199 // wxDir::GetAllFiles()
 200 // ----------------------------------------------------------------------------
 201
 202 class wxDirTraverserSimple : public wxDirTraverser
 203 {
 204 public:
 205     wxDirTraverserSimple(wxArrayString& files) : m_files(files) { }
 206
 207     virtual wxDirTraverseResult OnFile(const wxString& filename)
 208     {
 209         m_files.push_back(filename);
 210         return wxDIR_CONTINUE;
 211     }
 212
 213     virtual wxDirTraverseResult OnDir(const wxString& WXUNUSED(dirname))
 214     {
 215         return wxDIR_CONTINUE;
 216     }
 217
 218 private:
 219     wxArrayString& m_files;
 220 };
 221
 222 /* static */
 223 size_t wxDir::GetAllFiles(const wxString& dirname,
 224                           wxArrayString *files,
 225                           const wxString& filespec,
 226                           int flags)
 227 {
 228     wxCHECK_MSG( files, (size_t)-1, _T("NULL pointer in wxDir::GetAllFiles") );
 229
 230     size_t nFiles = 0;
 231
 232     wxDir dir(dirname);
 233     if ( dir.IsOpened() )
 234     {
 235         wxDirTraverserSimple traverser(*files);
 236
 237         nFiles += dir.Traverse(traverser, filespec, flags);
 238     }
 239
 240     return nFiles;
 241 }
 242