src/mgl/dir.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 SciTech Software, Inc. (www.scitechsoft.com)
  10 // Licence:     wxWindows license
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 // ============================================================================
  14 // declarations
  15 // ============================================================================
  16
  17 // ----------------------------------------------------------------------------
  18 // headers
  19 // ----------------------------------------------------------------------------
  20
  21 #ifdef __GNUG__
  22     #pragma implementation "dir.h"
  23 #endif
  24
  25 // For compilers that support precompilation, includes "wx.h".
  26 #include "wx/wxprec.h"
  27
  28 #ifdef __BORLANDC__
  29     #pragma hdrstop
  30 #endif
  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) { m_filespec = 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::Rewind()
 106 {
 107     if ( m_dir )
 108     {
 109         PM_findClose(m_dir);
 110         m_dir = NULL;
 111     }
 112 }
 113
 114 bool wxDirData::Read(wxString *filename)
 115 {
 116     PM_findData data;
 117     bool matches = FALSE;
 118
 119     data.dwSize = sizeof(data);
 120
 121     wxString path = m_dirname;
 122     path += wxFILE_SEP_PATH;
 123     path.reserve(path.length() + 255); // speed up string concatenation
 124
 125     while ( !matches )
 126     {
 127         if ( m_dir )
 128         {
 129             if ( !PM_findNextFile(m_dir, &data) )
 130                 return FALSE;
 131         }
 132         else
 133         {
 134             m_dir = PM_findFirstFile(path + m_filespec , &data);
 135             if ( m_dir == PM_FILE_INVALID )
 136             {
 137                 m_dir = NULL;
 138                 return FALSE;
 139             }
 140         }
 141
 142         // don't return "." and ".." unless asked for
 143         if ( data.name[0] == '.' &&
 144              ((data.name[1] == '.' && data.name[2] == '\0') ||
 145               (data.name[1] == '\0')) )
 146         {
 147             if ( !(m_flags & wxDIR_DOTDOT) )
 148                 continue;
 149
 150             // we found a valid match
 151             break;
 152         }
 153
 154         // check the type now
 155         if ( !(m_flags & wxDIR_FILES) && !(data.attrib & PM_FILE_DIRECTORY) )
 156         {
 157             // it's a file, but we don't want them
 158             continue;
 159         }
 160         else if ( !(m_flags & wxDIR_DIRS) && (data.attrib & PM_FILE_DIRECTORY) )
 161         {
 162             // it's a dir, and we don't want it
 163             continue;
 164         }
 165
 166         matches = m_flags & wxDIR_HIDDEN ? TRUE : !(data.attrib & PM_FILE_HIDDEN);
 167     }
 168
 169     *filename = data.name;
 170
 171     return TRUE;
 172 }
 173
 174
 175 // ----------------------------------------------------------------------------
 176 // wxDir helpers
 177 // ----------------------------------------------------------------------------
 178
 179 /* static */
 180 bool wxDir::Exists(const wxString& dir)
 181 {
 182     return wxPathExists(dir);
 183 }
 184
 185 // ----------------------------------------------------------------------------
 186 // wxDir construction/destruction
 187 // ----------------------------------------------------------------------------
 188
 189 wxDir::wxDir(const wxString& dirname)
 190 {
 191     m_data = NULL;
 192
 193     (void)Open(dirname);
 194 }
 195
 196 bool wxDir::Open(const wxString& dirname)
 197 {
 198     delete M_DIR;
 199     m_data = NULL;
 200
 201     if ( !wxDir::Exists(dirname) )
 202     {
 203         wxLogError(_("Directory '%s' doesn't exist!"), dirname.c_str());
 204         return FALSE;
 205     }
 206
 207     m_data = new wxDirData(dirname);
 208     return TRUE;
 209 }
 210
 211 bool wxDir::IsOpened() const
 212 {
 213     return m_data != NULL;
 214 }
 215
 216 wxString wxDir::GetName() const
 217 {
 218     wxString name;
 219     if ( m_data )
 220     {
 221         name = M_DIR->GetName();
 222         if ( !name.empty() && (name.Last() == wxFILE_SEP_PATH) )
 223         {
 224             // chop off the last (back)slash
 225             name.Truncate(name.length() - 1);
 226         }
 227     }
 228
 229     return name;
 230 }
 231
 232 wxDir::~wxDir()
 233 {
 234     delete M_DIR;
 235 }
 236
 237 // ----------------------------------------------------------------------------
 238 // wxDir enumerating
 239 // ----------------------------------------------------------------------------
 240
 241 bool wxDir::GetFirst(wxString *filename,
 242                      const wxString& filespec,
 243                      int flags) const
 244 {
 245     wxCHECK_MSG( IsOpened(), FALSE, _T("must wxDir::Open() first") );
 246
 247     M_DIR->Rewind();
 248
 249     M_DIR->SetFileSpec(filespec);
 250     M_DIR->SetFlags(flags);
 251
 252     return GetNext(filename);
 253 }
 254
 255 bool wxDir::GetNext(wxString *filename) const
 256 {
 257     wxCHECK_MSG( IsOpened(), FALSE, _T("must wxDir::Open() first") );
 258
 259     wxCHECK_MSG( filename, FALSE, _T("bad pointer in wxDir::GetNext()") );
 260
 261     return M_DIR->Read(filename);
 262 }
 263
 264 bool wxDir::HasSubDirs(const wxString& spec)
 265 {
 266     wxCHECK_MSG( IsOpened(), FALSE, _T("must wxDir::Open() first") );
 267
 268     // just try to find first directory
 269     wxString s;
 270     return GetFirst(&s, spec, wxDIR_DIRS | wxDIR_HIDDEN);
 271 }
 272