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 licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef   _WX_FILENAME_H_
  13 #define   _WX_FILENAME_H_
  14
  15 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  16     #pragma interface "filename.h"
  17 #endif
  18
  19 #ifndef WX_PRECOMP
  20     #include  "wx/string.h"
  21     #include  "wx/arrstr.h"
  22 #endif
  23
  24 /*
  25     TODO:
  26
  27     1. support for drives under Windows
  28     2. more file operations:
  29         a) chmod()
  30         b) [acm]time() - get and set
  31         c) file size
  32         d) file permissions with readable accessors for most common bits
  33            such as IsReadable() &c
  34         e) rename()?
  35     3. SameFileAs() function to compare inodes under Unix
  36  */
  37
  38 // ridiculously enough, this will replace DirExists with wxDirExists etc
  39 #include "wx/filefn.h"
  40 #include "wx/datetime.h"
  41
  42 class WXDLLIMPEXP_BASE wxFile;
  43
  44 // ----------------------------------------------------------------------------
  45 // constants
  46 // ----------------------------------------------------------------------------
  47
  48 // the various values for the path format: this mainly affects the path
  49 // separator but also whether or not the path has the drive part (as under
  50 // Windows)
  51 enum wxPathFormat
  52 {
  53     wxPATH_NATIVE = 0,      // the path format for the current platform
  54     wxPATH_UNIX,
  55     wxPATH_BEOS = wxPATH_UNIX,
  56     wxPATH_MAC,
  57     wxPATH_DOS,
  58     wxPATH_WIN = wxPATH_DOS,
  59     wxPATH_OS2 = wxPATH_DOS,
  60     wxPATH_VMS,
  61
  62     wxPATH_MAX // Not a valid value for specifying path format
  63 };
  64
  65 // the kind of normalization to do with the file name: these values can be
  66 // or'd together to perform several operations at once
  67 enum wxPathNormalize
  68 {
  69     wxPATH_NORM_ENV_VARS = 0x0001,  // replace env vars with their values
  70     wxPATH_NORM_DOTS     = 0x0002,  // squeeze all .. and . and prepend cwd
  71     wxPATH_NORM_TILDE    = 0x0004,  // Unix only: replace ~ and ~user
  72     wxPATH_NORM_CASE     = 0x0008,  // if case insensitive => tolower
  73     wxPATH_NORM_ABSOLUTE = 0x0010,  // make the path absolute
  74     wxPATH_NORM_LONG =     0x0020,  // make the path the long form
  75     wxPATH_NORM_SHORTCUT = 0x0040,  // resolve the shortcut, if it is a shortcut
  76     wxPATH_NORM_ALL      = 0x00ff & ~wxPATH_NORM_CASE
  77 };
  78
  79 // what exactly should GetPath() return?
  80 enum
  81 {
  82     wxPATH_GET_VOLUME    = 0x0001,  // include the volume if applicable
  83     wxPATH_GET_SEPARATOR = 0x0002   // terminate the path with the separator
  84 };
  85
  86 // MkDir flags
  87 enum
  88 {
  89     wxPATH_MKDIR_FULL    = 0x0001   // create directories recursively
  90 };
  91
  92 // ----------------------------------------------------------------------------
  93 // wxFileName: encapsulates a file path
  94 // ----------------------------------------------------------------------------
  95
  96 class WXDLLIMPEXP_BASE wxFileName
  97 {
  98 public:
  99     // constructors and assignment
 100
 101         // the usual stuff
 102     wxFileName() { Clear(); }
 103     wxFileName(const wxFileName& filepath) { Assign(filepath); }
 104
 105         // from a full filename: if it terminates with a '/', a directory path
 106         // is contructed (the name will be empty), otherwise a file name and
 107         // extension are extracted from it
 108     wxFileName( const wxString& fullpath, wxPathFormat format = wxPATH_NATIVE )
 109         { Assign( fullpath, format ); }
 110
 111         // from a directory name and a file name
 112     wxFileName(const wxString& path,
 113                const wxString& name,
 114                wxPathFormat format = wxPATH_NATIVE)
 115         { Assign(path, name, format); }
 116
 117         // from a volume, directory name, file base name and extension
 118     wxFileName(const wxString& volume,
 119                const wxString& path,
 120                const wxString& name,
 121                const wxString& ext,
 122                wxPathFormat format = wxPATH_NATIVE)
 123         { Assign(volume, path, name, ext, format); }
 124
 125         // from a directory name, file base name and extension
 126     wxFileName(const wxString& path,
 127                const wxString& name,
 128                const wxString& ext,
 129                wxPathFormat format = wxPATH_NATIVE)
 130         { Assign(path, name, ext, format); }
 131
 132         // the same for delayed initialization
 133
 134     void Assign(const wxFileName& filepath);
 135
 136     void Assign(const wxString& fullpath,
 137                 wxPathFormat format = wxPATH_NATIVE);
 138
 139     void Assign(const wxString& volume,
 140                 const wxString& path,
 141                 const wxString& name,
 142                 const wxString& ext,
 143                 wxPathFormat format = wxPATH_NATIVE);
 144
 145     void Assign(const wxString& path,
 146                 const wxString& name,
 147                 wxPathFormat format = wxPATH_NATIVE);
 148
 149     void Assign(const wxString& path,
 150                 const wxString& name,
 151                 const wxString& ext,
 152                 wxPathFormat format = wxPATH_NATIVE)
 153     {
 154         // empty volume
 155         Assign(wxEmptyString, path, name, ext, format);
 156     }
 157
 158     void AssignDir(const wxString& dir, wxPathFormat format = wxPATH_NATIVE);
 159
 160         // assorted assignment operators
 161
 162     wxFileName& operator=(const wxFileName& filename)
 163         { Assign(filename); return *this; }
 164
 165     wxFileName& operator=(const wxString& filename)
 166         { Assign(filename); return *this; }
 167
 168         // reset all components to default, uninitialized state
 169     void Clear();
 170
 171         // static pseudo constructors
 172     static wxFileName FileName(const wxString& file,
 173                                wxPathFormat format = wxPATH_NATIVE);
 174     static wxFileName DirName(const wxString& dir,
 175                               wxPathFormat format = wxPATH_NATIVE);
 176
 177     // file tests
 178
 179         // is the filename valid at all?
 180     bool IsOk() const { return m_dirs.size() != 0 || !m_name.IsEmpty(); }
 181
 182         // does the file with this name exists?
 183     bool FileExists() const;
 184     static bool FileExists( const wxString &file );
 185
 186         // does the directory with this name exists?
 187     bool DirExists() const;
 188     static bool DirExists( const wxString &dir );
 189
 190         // VZ: also need: IsDirWritable(), IsFileExecutable() &c (TODO)
 191
 192     // time functions
 193 #if wxUSE_DATETIME
 194         // set the file last access/mod and creation times
 195         // (any of the pointers may be NULL)
 196     bool SetTimes(const wxDateTime *dtAccess,
 197                   const wxDateTime *dtMod,
 198                   const wxDateTime *dtCreate);
 199
 200         // set the access and modification times to the current moment
 201     bool Touch();
 202
 203         // return the last access, last modification and create times
 204         // (any of the pointers may be NULL)
 205     bool GetTimes(wxDateTime *dtAccess,
 206                   wxDateTime *dtMod,
 207                   wxDateTime *dtCreate) const;
 208
 209         // convenience wrapper: get just the last mod time of the file
 210     wxDateTime GetModificationTime() const
 211     {
 212         wxDateTime dtMod;
 213         (void)GetTimes(NULL, &dtMod, NULL);
 214         return dtMod;
 215     }
 216 #endif // wxUSE_DATETIME
 217
 218 #ifdef __WXMAC__
 219     bool MacSetTypeAndCreator( wxUint32 type , wxUint32 creator ) ;
 220     bool MacGetTypeAndCreator( wxUint32 *type , wxUint32 *creator ) ;
 221     // gets the 'common' type and creator for a certain extension
 222     static bool MacFindDefaultTypeAndCreator( const wxString& ext , wxUint32 *type , wxUint32 *creator ) ;
 223     // registers application defined extensions and their default type and creator
 224     static void MacRegisterDefaultTypeAndCreator( const wxString& ext , wxUint32 type , wxUint32 creator ) ;
 225     // looks up the appropriate type and creator from the registration and then sets
 226     bool MacSetDefaultTypeAndCreator() ;
 227 #endif
 228
 229     // various file/dir operations
 230
 231         // retrieve the value of the current working directory
 232     void AssignCwd(const wxString& volume = wxEmptyString);
 233     static wxString GetCwd(const wxString& volume = wxEmptyString);
 234
 235         // change the current working directory
 236     bool SetCwd();
 237     static bool SetCwd( const wxString &cwd );
 238
 239         // get the value of user home (Unix only mainly)
 240     void AssignHomeDir();
 241     static wxString GetHomeDir();
 242
 243         // get a temp file name starting with the specified prefix and open the
 244         // file passed to us using this name for writing (atomically if
 245         // possible)
 246     void AssignTempFileName(const wxString& prefix, wxFile *fileTemp = NULL);
 247     static wxString CreateTempFileName(const wxString& prefix,
 248                                        wxFile *fileTemp = NULL);
 249
 250     // directory creation and removal.
 251     bool Mkdir( int perm = 0777, int flags = 0);
 252     static bool Mkdir( const wxString &dir, int perm = 0777, int flags = 0 );
 253
 254     bool Rmdir();
 255     static bool Rmdir( const wxString &dir );
 256
 257     // operations on the path
 258
 259         // normalize the path: with the default flags value, the path will be
 260         // made absolute, without any ".." and "." and all environment
 261         // variables will be expanded in it
 262         //
 263         // this may be done using another (than current) value of cwd
 264     bool Normalize(int flags = wxPATH_NORM_ALL,
 265                    const wxString& cwd = wxEmptyString,
 266                    wxPathFormat format = wxPATH_NATIVE);
 267
 268         // get a path path relative to the given base directory, i.e. opposite
 269         // of Normalize
 270         //
 271         // pass an empty string to get a path relative to the working directory
 272         //
 273         // returns true if the file name was modified, false if we failed to do
 274         // anything with it (happens when the file is on a different volume,
 275         // for example)
 276     bool MakeRelativeTo(const wxString& pathBase = wxEmptyString,
 277                         wxPathFormat format = wxPATH_NATIVE);
 278
 279         // make the path absolute
 280         //
 281         // this may be done using another (than current) value of cwd
 282     bool MakeAbsolute(const wxString& cwd = wxEmptyString,
 283                       wxPathFormat format = wxPATH_NATIVE)
 284         { return Normalize(wxPATH_NORM_DOTS | wxPATH_NORM_ABSOLUTE |
 285                            wxPATH_NORM_TILDE, cwd, format); }
 286
 287 #ifdef __WIN32__
 288         // if the path is a shortcut, return the target and optionally,
 289         // the arguments
 290     bool GetShortcutTarget(const wxString& shortcutPath, wxString& targetFilename, wxString* arguments = NULL);
 291 #endif
 292
 293     // Comparison
 294
 295         // compares with the rules of the given platforms format
 296     bool SameAs(const wxFileName& filepath,
 297                 wxPathFormat format = wxPATH_NATIVE) const;
 298
 299         // compare with another filename object
 300     bool operator==(const wxFileName& filename) const
 301         { return SameAs(filename); }
 302     bool operator!=(const wxFileName& filename) const
 303         { return !SameAs(filename); }
 304
 305         // compare with a filename string interpreted as a native file name
 306     bool operator==(const wxString& filename) const
 307         { return SameAs(wxFileName(filename)); }
 308     bool operator!=(const wxString& filename) const
 309         { return !SameAs(wxFileName(filename)); }
 310
 311         // are the file names of this type cases sensitive?
 312     static bool IsCaseSensitive( wxPathFormat format = wxPATH_NATIVE );
 313
 314         // is this filename absolute?
 315     bool IsAbsolute(wxPathFormat format = wxPATH_NATIVE) const;
 316
 317         // is this filename relative?
 318     bool IsRelative(wxPathFormat format = wxPATH_NATIVE) const
 319         { return !IsAbsolute(format); }
 320
 321     // Returns the characters that aren't allowed in filenames
 322     // on the specified platform.
 323     static wxString GetForbiddenChars(wxPathFormat format = wxPATH_NATIVE);
 324
 325     // Information about path format
 326
 327     // get the string separating the volume from the path for this format,
 328     // return an empty string if this format doesn't support the notion of
 329     // volumes at all
 330     static wxString GetVolumeSeparator(wxPathFormat format = wxPATH_NATIVE);
 331
 332     // get the string of path separators for this format
 333     static wxString GetPathSeparators(wxPathFormat format = wxPATH_NATIVE);
 334
 335     // get the canonical path separator for this format
 336     static wxChar GetPathSeparator(wxPathFormat format = wxPATH_NATIVE)
 337         { return GetPathSeparators(format)[0u]; }
 338
 339     // is the char a path separator for this format?
 340     static bool IsPathSeparator(wxChar ch, wxPathFormat format = wxPATH_NATIVE);
 341
 342     // Dir accessors
 343     void AppendDir( const wxString &dir );
 344     void PrependDir( const wxString &dir );
 345     void InsertDir( int before, const wxString &dir );
 346     void RemoveDir( int pos );
 347     size_t GetDirCount() const { return m_dirs.size(); }
 348
 349     // Other accessors
 350     void SetExt( const wxString &ext )          { m_ext = ext; }
 351     wxString GetExt() const                     { return m_ext; }
 352     bool HasExt() const                         { return !m_ext.empty(); }
 353
 354     void SetName( const wxString &name )        { m_name = name; }
 355     wxString GetName() const                    { return m_name; }
 356     bool HasName() const                        { return !m_name.empty(); }
 357
 358     void SetVolume( const wxString &volume )    { m_volume = volume; }
 359     wxString GetVolume() const                  { return m_volume; }
 360     bool HasVolume() const                      { return !m_volume.empty(); }
 361
 362     // full name is the file name + extension (but without the path)
 363     void SetFullName(const wxString& fullname);
 364     wxString GetFullName() const;
 365
 366     const wxArrayString& GetDirs() const        { return m_dirs; }
 367
 368     // flags are combination of wxPATH_GET_XXX flags
 369     wxString GetPath(int flags = wxPATH_GET_VOLUME,
 370                      wxPathFormat format = wxPATH_NATIVE) const;
 371
 372     // Replace current path with this one
 373     void SetPath( const wxString &path, wxPathFormat format = wxPATH_NATIVE );
 374
 375     // Construct full path with name and ext
 376     wxString GetFullPath( wxPathFormat format = wxPATH_NATIVE ) const;
 377
 378     // Return the short form of the path (returns identity on non-Windows platforms)
 379     wxString GetShortPath() const;
 380
 381     // Return the long form of the path (returns identity on non-Windows platforms)
 382     wxString GetLongPath() const;
 383
 384     // Is this a file or directory (not necessarily an existing one)
 385     bool IsDir() const { return m_name.empty() && m_ext.empty(); }
 386
 387     // various helpers
 388
 389         // get the canonical path format for this platform
 390     static wxPathFormat GetFormat( wxPathFormat format = wxPATH_NATIVE );
 391
 392         // split a fullpath into the volume, path, (base) name and extension
 393         // (all of the pointers can be NULL)
 394     static void SplitPath(const wxString& fullpath,
 395                           wxString *volume,
 396                           wxString *path,
 397                           wxString *name,
 398                           wxString *ext,
 399                           wxPathFormat format = wxPATH_NATIVE);
 400
 401         // compatibility version
 402     static void SplitPath(const wxString& fullpath,
 403                           wxString *path,
 404                           wxString *name,
 405                           wxString *ext,
 406                           wxPathFormat format = wxPATH_NATIVE);
 407
 408
 409     // deprecated methods, don't use any more
 410     // --------------------------------------
 411
 412 #ifndef __DIGITALMARS__
 413     wxString GetPath( bool withSep, wxPathFormat format = wxPATH_NATIVE ) const
 414         { return GetPath(withSep ? wxPATH_GET_SEPARATOR : 0, format); }
 415 #endif
 416     wxString GetPathWithSep(wxPathFormat format = wxPATH_NATIVE ) const
 417         { return GetPath(wxPATH_GET_SEPARATOR, format); }
 418
 419 private:
 420     // check whether this dir is valid for Append/Prepend/InsertDir()
 421     static bool IsValidDirComponent(const wxString& dir);
 422
 423     // the drive/volume/device specification (always empty for Unix)
 424     wxString        m_volume;
 425
 426     // the path components of the file
 427     wxArrayString   m_dirs;
 428
 429     // the file name and extension (empty for directories)
 430     wxString        m_name,
 431                     m_ext;
 432
 433     // when m_dirs is empty it may mean either that we have no path at all or
 434     // that our path is '/', i.e. the root directory
 435     //
 436     // we use m_relative to distinguish between these two cases, it will be
 437     // true in the former and false in the latter
 438     //
 439     // NB: the path is not absolute just because m_relative is false, it still
 440     //     needs the drive (i.e. volume) in some formats (Windows)
 441     bool            m_relative;
 442 };
 443
 444 #endif // _WX_FILENAME_H_
 445