src/mgl/dirmgl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        mgl/dir.cpp
   3 // Purpose:     wxDir implementation for MGL
   4 // Author:      Vaclav Slavik, Vadim Zeitlin
   5 // Modified by:
   6 // Created:     2001/12/09
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1999 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 //              (c) 2001-2002 SciTech Software, Inc. (www.scitechsoft.com)
  10 // Licence:     wxWindows licence
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 // ============================================================================
  14 // declarations
  15 // ============================================================================
  16
  17 // ----------------------------------------------------------------------------
  18 // headers
  19 // ----------------------------------------------------------------------------
  20
  21 // For compilers that support precompilation, includes "wx.h".
  22 #include "wx/wxprec.h"
  23
  24 #ifdef __BORLANDC__
  25     #pragma hdrstop
  26 #endif
  27
  28 #include "wx/defs.h"
  29
  30 #ifndef __UNIX__
  31
  32 #ifndef WX_PRECOMP
  33     #include "wx/intl.h"
  34     #include "wx/log.h"
  35 #endif // PCH
  36
  37 #include "wx/dir.h"
  38 #include "wx/filefn.h"          // for wxMatchWild
  39 #include "wx/mgl/private.h"
  40
  41 // ----------------------------------------------------------------------------
  42 // macros
  43 // ----------------------------------------------------------------------------
  44
  45 #define M_DIR       ((wxDirData *)m_data)
  46
  47 // ----------------------------------------------------------------------------
  48 // private classes
  49 // ----------------------------------------------------------------------------
  50
  51 // this class stores everything we need to enumerate the files
  52 class wxDirData
  53 {
  54 public:
  55     wxDirData(const wxString& dirname);
  56     ~wxDirData();
  57
  58     bool IsOk() const { return m_dir != NULL; }
  59
  60     void SetFileSpec(const wxString& filespec);
  61     void SetFlags(int flags) { m_flags = flags; }
  62
  63     void Rewind();
  64     bool Read(wxString *filename);
  65
  66     const wxString& GetName() const { return m_dirname; }
  67
  68 private:
  69     void    *m_dir;
  70
  71     wxString m_dirname;
  72     wxString m_filespec;
  73
  74     int      m_flags;
  75 };
  76
  77 // ============================================================================
  78 // implementation
  79 // ============================================================================
  80
  81 // ----------------------------------------------------------------------------
  82 // wxDirData
  83 // ----------------------------------------------------------------------------
  84
  85 wxDirData::wxDirData(const wxString& dirname)
  86          : m_dirname(dirname)
  87 {
  88     m_dir = NULL;
  89
  90     // throw away the trailing slashes
  91     size_t n = m_dirname.length();
  92     wxCHECK_RET( n, _T("empty dir name in wxDir") );
  93
  94     while ( n > 0 && m_dirname[--n] == wxFILE_SEP_PATH ) {}
  95
  96     m_dirname.Truncate(n + 1);
  97 }
  98
  99 wxDirData::~wxDirData()
 100 {
 101     if ( m_dir )
 102         PM_findClose(m_dir);
 103 }
 104
 105 void wxDirData::SetFileSpec(const wxString& filespec)
 106 {
 107 #ifdef __DOS__
 108     if ( filespec.empty() )
 109         m_filespec = _T("*.*");
 110     else
 111 #endif
 112     m_filespec = filespec;
 113 }
 114
 115 void wxDirData::Rewind()
 116 {
 117     if ( m_dir )
 118     {
 119         PM_findClose(m_dir);
 120         m_dir = NULL;
 121     }
 122 }
 123
 124 bool wxDirData::Read(wxString *filename)
 125 {
 126     PM_findData data;
 127     bool matches = false;
 128
 129     data.dwSize = sizeof(data);
 130
 131     wxString path = m_dirname;
 132     path += wxFILE_SEP_PATH;
 133     path.reserve(path.length() + 255); // speed up string concatenation
 134
 135     while ( !matches )
 136     {
 137         if ( m_dir )
 138         {
 139             if ( !PM_findNextFile(m_dir, &data) )
 140                 return false;
 141         }
 142         else
 143         {
 144             m_dir = PM_findFirstFile(path + m_filespec , &data);
 145             if ( m_dir == PM_FILE_INVALID )
 146             {
 147                 m_dir = NULL;
 148                 return false;
 149             }
 150         }
 151
 152         // don't return "." and ".." unless asked for
 153         if ( data.name[0] == '.' &&
 154              ((data.name[1] == '.' && data.name[2] == '\0') ||
 155               (data.name[1] == '\0')) )
 156         {
 157             if ( !(m_flags & wxDIR_DOTDOT) )
 158                 continue;
 159
 160             // we found a valid match
 161             break;
 162         }
 163
 164         // check the type now
 165         if ( !(m_flags & wxDIR_FILES) && !(data.attrib & PM_FILE_DIRECTORY) )
 166         {
 167             // it's a file, but we don't want them
 168             continue;
 169         }
 170         else if ( !(m_flags & wxDIR_DIRS) && (data.attrib & PM_FILE_DIRECTORY) )
 171         {
 172             // it's a dir, and we don't want it
 173             continue;
 174         }
 175
 176         matches = m_flags & wxDIR_HIDDEN ? true : !(data.attrib & PM_FILE_HIDDEN);
 177     }
 178
 179     *filename = data.name;
 180
 181     return true;
 182 }
 183
 184
 185 // ----------------------------------------------------------------------------
 186 // wxDir helpers
 187 // ----------------------------------------------------------------------------
 188
 189 /* static */
 190 bool wxDir::Exists(const wxString& dir)
 191 {
 192     return wxDirExists(dir);
 193 }
 194
 195 // ----------------------------------------------------------------------------
 196 // wxDir construction/destruction
 197 // ----------------------------------------------------------------------------
 198
 199 wxDir::wxDir(const wxString& dirname)
 200 {
 201     m_data = NULL;
 202
 203     (void)Open(dirname);
 204 }
 205
 206 bool wxDir::Open(const wxString& dirname)
 207 {
 208     delete M_DIR;
 209     m_data = NULL;
 210
 211     if ( !wxDir::Exists(dirname) )
 212     {
 213         wxLogError(_("Directory '%s' doesn't exist!"), dirname.c_str());
 214         return false;
 215     }
 216
 217     m_data = new wxDirData(dirname);
 218     return true;
 219 }
 220
 221 bool wxDir::IsOpened() const
 222 {
 223     return m_data != NULL;
 224 }
 225
 226 wxString wxDir::GetName() const
 227 {
 228     wxString name;
 229     if ( m_data )
 230     {
 231         name = M_DIR->GetName();
 232         if ( !name.empty() && (name.Last() == wxFILE_SEP_PATH) )
 233         {
 234             // chop off the last (back)slash
 235             name.Truncate(name.length() - 1);
 236         }
 237     }
 238
 239     return name;
 240 }
 241
 242 wxDir::~wxDir()
 243 {
 244     delete M_DIR;
 245 }
 246
 247 // ----------------------------------------------------------------------------
 248 // wxDir enumerating
 249 // ----------------------------------------------------------------------------
 250
 251 bool wxDir::GetFirst(wxString *filename,
 252                      const wxString& filespec,
 253                      int flags) const
 254 {
 255     wxCHECK_MSG( IsOpened(), false, _T("must wxDir::Open() first") );
 256
 257     M_DIR->Rewind();
 258
 259     M_DIR->SetFileSpec(filespec);
 260     M_DIR->SetFlags(flags);
 261
 262     return GetNext(filename);
 263 }
 264
 265 bool wxDir::GetNext(wxString *filename) const
 266 {
 267     wxCHECK_MSG( IsOpened(), false, _T("must wxDir::Open() first") );
 268
 269     wxCHECK_MSG( filename, false, _T("bad pointer in wxDir::GetNext()") );
 270
 271     return M_DIR->Read(filename);
 272 }
 273
 274 #endif // !__UNIX__
 275