src/msw/dir.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/dir.cpp
   3 // Purpose:     wxDir implementation for Win32
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     08.12.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1999 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "dir.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/intl.h"
  33     #include "wx/log.h"
  34 #endif // PCH
  35
  36 #include "wx/dir.h"
  37 #include "wx/filefn.h"          // for wxPathExists()
  38
  39 #include <windows.h>
  40
  41 // ----------------------------------------------------------------------------
  42 // constants
  43 // ----------------------------------------------------------------------------
  44
  45 #ifndef MAX_PATH
  46     #define MAX_PATH 260        // from VC++ headers
  47 #endif
  48
  49 // ----------------------------------------------------------------------------
  50 // macros
  51 // ----------------------------------------------------------------------------
  52
  53 #define M_DIR       ((wxDirData *)m_data)
  54
  55 // ----------------------------------------------------------------------------
  56 // private classes
  57 // ----------------------------------------------------------------------------
  58
  59 // this class stores everything we need to enumerate the files
  60 class wxDirData
  61 {
  62 public:
  63     wxDirData(const wxString& dirname);
  64     ~wxDirData();
  65
  66     void SetFileSpec(const wxString& filespec) { m_filespec = filespec; }
  67     void SetFlags(int flags) { m_flags = flags; }
  68
  69     void Close();
  70     void Rewind();
  71     bool Read(wxString *filename);
  72
  73 private:
  74     HANDLE   m_handle;
  75
  76     wxString m_dirname;
  77     wxString m_filespec;
  78
  79     int      m_flags;
  80 };
  81
  82 // ============================================================================
  83 // implementation
  84 // ============================================================================
  85
  86 // ----------------------------------------------------------------------------
  87 // wxDirData
  88 // ----------------------------------------------------------------------------
  89
  90 wxDirData::wxDirData(const wxString& dirname)
  91          : m_dirname(dirname)
  92 {
  93     m_handle = INVALID_HANDLE_VALUE;
  94 }
  95
  96 wxDirData::~wxDirData()
  97 {
  98     Close();
  99 }
 100
 101 void wxDirData::Close()
 102 {
 103     if ( m_handle != INVALID_HANDLE_VALUE )
 104     {
 105         if ( !::FindClose(m_handle) )
 106         {
 107             wxLogLastError(_T("FindClose"));
 108         }
 109
 110         m_handle = INVALID_HANDLE_VALUE;
 111     }
 112 }
 113
 114 void wxDirData::Rewind()
 115 {
 116     Close();
 117 }
 118
 119 bool wxDirData::Read(wxString *filename)
 120 {
 121     bool first = FALSE;
 122
 123     WIN32_FIND_DATA finddata;
 124     if ( m_handle == INVALID_HANDLE_VALUE )
 125     {
 126         // open first
 127         wxString filespec;
 128         filespec << m_dirname << _T('\\')
 129                  << (!m_filespec ? _T("*.*") : m_filespec.c_str());
 130
 131         m_handle = ::FindFirstFile(filespec, &finddata);
 132
 133         first = TRUE;
 134     }
 135
 136     if ( m_handle == INVALID_HANDLE_VALUE )
 137     {
 138         DWORD err = ::GetLastError();
 139
 140         if ( err != ERROR_FILE_NOT_FOUND )
 141         {
 142             wxLogSysError(err, _("Can not enumerate files in directory '%s'"),
 143                           m_dirname.c_str());
 144         }
 145         //else: not an error, just no (such) files
 146
 147         return FALSE;
 148     }
 149
 150     const wxChar *name;
 151     DWORD attr;
 152
 153     for ( ;; )
 154     {
 155         if ( first )
 156         {
 157             first = FALSE;
 158         }
 159         else
 160         {
 161             if ( !::FindNextFile(m_handle, &finddata) )
 162             {
 163                 DWORD err = ::GetLastError();
 164
 165                 if ( err != ERROR_NO_MORE_FILES )
 166                 {
 167                     wxLogLastError(_T("FindNext"));
 168                 }
 169                 //else: not an error, just no more (such) files
 170
 171                 return FALSE;
 172             }
 173         }
 174
 175         name = finddata.cFileName;
 176         attr = finddata.dwFileAttributes;
 177
 178         // don't return "." and ".." unless asked for
 179         if ( name[0] == _T('.') &&
 180              ((name[1] == _T('.') && name[2] == _T('\0')) ||
 181               (name[1] == _T('\0'))) )
 182         {
 183             if ( !(m_flags & wxDIR_DOTDOT) )
 184                 continue;
 185         }
 186
 187         // check the type now
 188         if ( !(m_flags & wxDIR_FILES) && !(attr & FILE_ATTRIBUTE_DIRECTORY) )
 189         {
 190             // it's a file, but we don't want them
 191             continue;
 192         }
 193         else if ( !(m_flags & wxDIR_DIRS) && (attr & FILE_ATTRIBUTE_DIRECTORY) )
 194         {
 195             // it's a dir, and we don't want it
 196             continue;
 197         }
 198
 199         // finally, check whether it's a hidden file
 200         if ( !(m_flags & wxDIR_HIDDEN) )
 201         {
 202             if ( attr & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM) )
 203             {
 204                 // it's a hidden file, skip it
 205                 continue;
 206             }
 207         }
 208
 209         *filename = name;
 210
 211         break;
 212     }
 213
 214     return TRUE;
 215 }
 216
 217 // ----------------------------------------------------------------------------
 218 // wxDir helpers
 219 // ----------------------------------------------------------------------------
 220
 221 /* static */
 222 bool wxDir::Exists(const wxString& dir)
 223 {
 224     return wxPathExists(dir);
 225 }
 226
 227 // ----------------------------------------------------------------------------
 228 // wxDir construction/destruction
 229 // ----------------------------------------------------------------------------
 230
 231 wxDir::wxDir(const wxString& dirname)
 232 {
 233     m_data = NULL;
 234
 235     (void)Open(dirname);
 236 }
 237
 238 bool wxDir::Open(const wxString& dirname)
 239 {
 240     delete M_DIR;
 241     m_data = new wxDirData(dirname);
 242
 243     return TRUE;
 244 }
 245
 246 bool wxDir::IsOpened() const
 247 {
 248     return m_data != NULL;
 249 }
 250
 251 wxDir::~wxDir()
 252 {
 253     delete M_DIR;
 254 }
 255
 256 // ----------------------------------------------------------------------------
 257 // wxDir enumerating
 258 // ----------------------------------------------------------------------------
 259
 260 bool wxDir::GetFirst(wxString *filename,
 261                      const wxString& filespec,
 262                      int flags) const
 263 {
 264     wxCHECK_MSG( IsOpened(), FALSE, _T("must wxDir::Open() first") );
 265
 266     M_DIR->Rewind();
 267
 268     M_DIR->SetFileSpec(filespec);
 269     M_DIR->SetFlags(flags);
 270
 271     return GetNext(filename);
 272 }
 273
 274 bool wxDir::GetNext(wxString *filename) const
 275 {
 276     wxCHECK_MSG( IsOpened(), FALSE, _T("must wxDir::Open() first") );
 277
 278     wxCHECK_MSG( filename, FALSE, _T("bad pointer in wxDir::GetNext()") );
 279
 280     return M_DIR->Read(filename);
 281 }