include/wx/filename.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/filename.h
   3 // Purpose:     wxFileName - encapsulates a file path
   4 // Author:      Robert Roebling, Vadim Zeitlin
   5 // Modified by:
   6 // Created:     28.12.00
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2000 Robert Roebling
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef   _WX_FILENAME_H_
  13 #define   _WX_FILENAME_H_
  14
  15 #ifdef __GNUG__
  16     #pragma interface "filename.h"
  17 #endif
  18
  19 #ifndef WX_PRECOMP
  20     #include  "wx/string.h"
  21 #endif
  22
  23 /*
  24     TODO:
  25
  26     1. support for drives under Windows
  27     2. more file operations:
  28         a) chmod()
  29         b) [acm]time() - get and set
  30         c) file size
  31         d) file permissions with readable accessors for most common bits
  32            such as IsReadable() &c
  33         e) rename()?
  34     3. SameFileAs() function to compare inodes under Unix
  35  */
  36
  37 // ridiculously enough, this will replace DirExists with wxDirExists etc
  38 #include "wx/filefn.h"
  39 #include "wx/datetime.h"
  40
  41 // ----------------------------------------------------------------------------
  42 // constants
  43 // ----------------------------------------------------------------------------
  44
  45 // the various values for the path format: this mainly affects the path
  46 // separator but also whether or not the path has the drive part (as under
  47 // Windows)
  48 enum wxPathFormat
  49 {
  50     wxPATH_NATIVE = 0,      // the path format for the current platform
  51     wxPATH_UNIX,
  52     wxPATH_MAC,
  53     wxPATH_DOS,
  54     wxPATH_VMS,
  55
  56     wxPATH_BEOS = wxPATH_UNIX,
  57     wxPATH_WIN = wxPATH_DOS,
  58     wxPATH_OS2 = wxPATH_DOS
  59 };
  60
  61 // the kind of normalization to do with the file name: these values can be
  62 // or'd together to perform several operations at once
  63 enum wxPathNormalize
  64 {
  65     wxPATH_NORM_ENV_VARS = 0x0001,  // replace env vars with their values
  66     wxPATH_NORM_DOTS     = 0x0002,  // squeeze all .. and . and prepend cwd
  67     wxPATH_NORM_TILDE    = 0x0004,  // Unix only: replace ~ and ~user
  68     wxPATH_NORM_CASE     = 0x0008,  // if case insensitive => tolower
  69     wxPATH_NORM_ABSOLUTE = 0x0010,  // make the path absolute
  70     wxPATH_NORM_LONG =     0x0020,  // make the path the long form
  71     wxPATH_NORM_ALL      = 0x003f
  72 };
  73
  74 // ----------------------------------------------------------------------------
  75 // wxFileName: encapsulates a file path
  76 // ----------------------------------------------------------------------------
  77
  78 class WXDLLEXPORT wxFileName
  79 {
  80 public:
  81     // constructors and assignment
  82
  83         // the usual stuff
  84     wxFileName() { }
  85     wxFileName( const wxFileName &filepath ) { Assign(filepath); }
  86
  87         // from a full filename: if it terminates with a '/', a directory path
  88         // is contructed (the name will be empty), otherwise a file name and
  89         // extension are extracted from it
  90     wxFileName( const wxString& fullpath, wxPathFormat format = wxPATH_NATIVE )
  91         { Assign( fullpath, format ); }
  92
  93         // from a directory name and a file name
  94     wxFileName(const wxString& path,
  95                const wxString& name,
  96                wxPathFormat format = wxPATH_NATIVE)
  97         { Assign(path, name, format); }
  98
  99         // from a directory name, file base name and extension
 100     wxFileName(const wxString& path,
 101                const wxString& name,
 102                const wxString& ext,
 103                wxPathFormat format = wxPATH_NATIVE)
 104         { Assign(path, name, ext, format); }
 105
 106         // the same for delayed initialization
 107
 108     void Assign(const wxFileName& filepath);
 109
 110     void Assign(const wxString& fullpath,
 111                 wxPathFormat format = wxPATH_NATIVE);
 112
 113     void Assign(const wxString& volume,
 114                 const wxString& path,
 115                 const wxString& name,
 116                 const wxString& ext,
 117                 wxPathFormat format = wxPATH_NATIVE);
 118
 119     void Assign(const wxString& path,
 120                 const wxString& name,
 121                 wxPathFormat format = wxPATH_NATIVE);
 122
 123     void Assign(const wxString& path,
 124                 const wxString& name,
 125                 const wxString& ext,
 126                 wxPathFormat format = wxPATH_NATIVE)
 127     {
 128         // empty volume
 129         Assign(_T(""), path, name, ext, format);
 130     }
 131
 132     void AssignDir(const wxString& dir, wxPathFormat format = wxPATH_NATIVE)
 133         { Assign(dir, _T(""), format); }
 134
 135         // assorted assignment operators
 136
 137     wxFileName& operator=(const wxFileName& filename)
 138         { Assign(filename); return *this; }
 139
 140     wxFileName& operator=(const wxString& filename)
 141         { Assign(filename); return *this; }
 142
 143         // reset all components to default, uninitialized state
 144     void Clear();
 145
 146         // static pseudo constructors
 147     static wxFileName FileName(const wxString& file);
 148     static wxFileName DirName(const wxString& dir);
 149
 150     // file tests
 151
 152         // is the filename valid at all?
 153     bool IsOk() const { return !m_dirs.IsEmpty() || !m_name.IsEmpty(); }
 154
 155         // does the file with this name exists?
 156     bool FileExists();
 157     static bool FileExists( const wxString &file );
 158
 159         // does the directory with this name exists?
 160     bool DirExists();
 161     static bool DirExists( const wxString &dir );
 162
 163         // VZ: also need: IsDirWritable(), IsFileExecutable() &c (TODO)
 164
 165     // time functions
 166
 167         // set the file creation and last access/mod times
 168         // (any of the pointers may be NULL)
 169     bool SetTimes(const wxDateTime *dtCreate,
 170                   const wxDateTime *dtAccess,
 171                   const wxDateTime *dtMod);
 172
 173         // set the access and modification times to the current moment
 174     bool Touch();
 175
 176         // return the last access, last modification and last change times
 177         // (any of the pointers may be NULL)
 178     bool GetTimes(wxDateTime *dtAccess,
 179                   wxDateTime *dtMod,
 180                   wxDateTime *dtChange) const;
 181
 182         // convenience wrapper: get just the last mod time of the file
 183     wxDateTime GetModificationTime() const
 184     {
 185         wxDateTime dtMod;
 186         (void)GetTimes(NULL, &dtMod, NULL);
 187         return dtMod;
 188     }
 189
 190     // various file/dir operations
 191
 192         // retrieve the value of the current working directory
 193     void AssignCwd();
 194     static wxString GetCwd();
 195
 196         // change the current working directory
 197     bool SetCwd();
 198     static bool SetCwd( const wxString &cwd );
 199
 200         // get the value of user home (Unix only mainly)
 201     void AssignHomeDir();
 202     static wxString GetHomeDir();
 203
 204         // get a temp file name starting with thespecified prefix
 205     void AssignTempFileName( const wxString &prefix );
 206
 207     // directory creation and removal.
 208     // if full is TRUE, will try to make each directory in the path.
 209     bool Mkdir( int perm = 0777, bool full = FALSE);
 210     static bool Mkdir( const wxString &dir, int perm = 0777, bool full = FALSE );
 211
 212     bool Rmdir();
 213     static bool Rmdir( const wxString &dir );
 214
 215     // operations on the path
 216
 217         // normalize the path: with the default flags value, the path will be
 218         // made absolute, without any ".." and "." and all environment
 219         // variables will be expanded in it
 220         //
 221         // this may be done using another (than current) value of cwd
 222     bool Normalize(wxPathNormalize flags = wxPATH_NORM_ALL,
 223                    const wxString& cwd = wxEmptyString,
 224                    wxPathFormat format = wxPATH_NATIVE);
 225
 226     // Comparison
 227
 228         // compares with the rules of this platform
 229     bool SameAs(const wxFileName &filepath,
 230                 wxPathFormat format = wxPATH_NATIVE);
 231
 232         // uses the current platform settings
 233     bool operator==(const wxFileName& filename) { return SameAs(filename); }
 234     bool operator==(const wxString& filename)
 235         { return *this == wxFileName(filename); }
 236
 237     // Tests
 238
 239         // are the file names of this type cases sensitive?
 240     static bool IsCaseSensitive( wxPathFormat format = wxPATH_NATIVE );
 241
 242         // is this filename absolute?
 243     bool IsAbsolute( wxPathFormat format = wxPATH_NATIVE );
 244
 245         // is this filename relative?
 246     bool IsRelative( wxPathFormat format = wxPATH_NATIVE )
 247         { return !IsAbsolute(format); }
 248
 249     // Information about path format
 250
 251     // get the string separating the volume from the path for this format
 252     static wxString GetVolumeSeparator(wxPathFormat format = wxPATH_NATIVE);
 253
 254     // get the string of path separators for this format
 255     static wxString GetPathSeparators(wxPathFormat format = wxPATH_NATIVE);
 256
 257     // is the char a path separator for this format?
 258     static bool IsPathSeparator(wxChar ch, wxPathFormat format = wxPATH_NATIVE);
 259
 260     // FIXME: what exactly does this do?
 261     bool IsWild( wxPathFormat format = wxPATH_NATIVE );
 262
 263     // Dir accessors
 264     void AppendDir( const wxString &dir );
 265     void PrependDir( const wxString &dir );
 266     void InsertDir( int before, const wxString &dir );
 267     void RemoveDir( int pos );
 268     size_t GetDirCount() const { return m_dirs.GetCount(); }
 269
 270     // Other accessors
 271     void SetExt( const wxString &ext )          { m_ext = ext; }
 272     wxString GetExt() const                     { return m_ext; }
 273     bool HasExt() const                         { return !m_ext.empty(); }
 274
 275     void SetName( const wxString &name )        { m_name = name; }
 276     wxString GetName() const                    { return m_name; }
 277     bool HasName() const                        { return !m_name.empty(); }
 278
 279     void SetVolume( const wxString &volume )    { m_volume = volume; }
 280     wxString GetVolume() const                  { return m_volume; }
 281     bool HasVolume() const                      { return !m_volume.empty(); }
 282
 283     // full name is the file name + extension (but without the path)
 284     void SetFullName(const wxString& fullname);
 285     wxString GetFullName() const;
 286
 287     const wxArrayString& GetDirs() const        { return m_dirs; }
 288
 289     // Construct path only - possibly with the trailing separator
 290     wxString GetPath( bool add_separator = FALSE,
 291                       wxPathFormat format = wxPATH_NATIVE ) const;
 292
 293     // more readable synonym
 294     wxString GetPathWithSep(wxPathFormat format = wxPATH_NATIVE ) const
 295         { return GetPath(TRUE /* add separator */, format); }
 296
 297     // Construct full path with name and ext
 298     wxString GetFullPath( wxPathFormat format = wxPATH_NATIVE ) const;
 299
 300     // Return the short form of the path (returns identity on non-Windows platforms)
 301     wxString GetShortPath() const;
 302
 303     // Return the long form of the path (returns identity on non-Windows platforms)
 304     wxString GetLongPath() const;
 305
 306     // various helpers
 307
 308         // get the canonical path format for this platform
 309     static wxPathFormat GetFormat( wxPathFormat format = wxPATH_NATIVE );
 310
 311         // split a fullpath into the volume, path, (base) name and extension
 312         // (all of the pointers can be NULL)
 313     static void SplitPath(const wxString& fullpath,
 314                           wxString *volume,
 315                           wxString *path,
 316                           wxString *name,
 317                           wxString *ext,
 318                           wxPathFormat format = wxPATH_NATIVE);
 319
 320         // compatibility version
 321     static void SplitPath(const wxString& fullpath,
 322                           wxString *path,
 323                           wxString *name,
 324                           wxString *ext,
 325                           wxPathFormat format = wxPATH_NATIVE)
 326     {
 327         SplitPath(fullpath, NULL, path, name, ext, format);
 328     }
 329
 330 private:
 331     // the drive/volume/device specification (always empty for Unix)
 332     wxString        m_volume;
 333
 334     // the path components of the file
 335     wxArrayString   m_dirs;
 336
 337     // the file name and extension (empty for directories)
 338     wxString        m_name,
 339                     m_ext;
 340 };
 341
 342 #endif // _WX_FILENAME_H_
 343