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 /*
  16     TODO:
  17
  18     1. support for drives under Windows
  19     2. more file operations:
  20         a) chmod()
  21         b) [acm]time() - get and set
  22         c) rename()?
  23     3. SameFileAs() function to compare inodes under Unix
  24  */
  25
  26 #include "wx/arrstr.h"
  27 #include "wx/filefn.h"
  28 #include "wx/datetime.h"
  29 #include "wx/intl.h"
  30
  31 #if wxUSE_FILE
  32 class WXDLLIMPEXP_BASE wxFile;
  33 #endif
  34
  35 #if wxUSE_FFILE
  36 class WXDLLIMPEXP_BASE wxFFile;
  37 #endif
  38
  39 // ----------------------------------------------------------------------------
  40 // constants
  41 // ----------------------------------------------------------------------------
  42
  43 // the various values for the path format: this mainly affects the path
  44 // separator but also whether or not the path has the drive part (as under
  45 // Windows)
  46 enum wxPathFormat
  47 {
  48     wxPATH_NATIVE = 0,      // the path format for the current platform
  49     wxPATH_UNIX,
  50     wxPATH_BEOS = wxPATH_UNIX,
  51     wxPATH_MAC,
  52     wxPATH_DOS,
  53     wxPATH_WIN = wxPATH_DOS,
  54     wxPATH_OS2 = wxPATH_DOS,
  55     wxPATH_VMS,
  56
  57     wxPATH_MAX // Not a valid value for specifying path format
  58 };
  59
  60 // the kind of normalization to do with the file name: these values can be
  61 // or'd together to perform several operations at once
  62 enum wxPathNormalize
  63 {
  64     wxPATH_NORM_ENV_VARS = 0x0001,  // replace env vars with their values
  65     wxPATH_NORM_DOTS     = 0x0002,  // squeeze all .. and . and prepend cwd
  66     wxPATH_NORM_TILDE    = 0x0004,  // Unix only: replace ~ and ~user
  67     wxPATH_NORM_CASE     = 0x0008,  // if case insensitive => tolower
  68     wxPATH_NORM_ABSOLUTE = 0x0010,  // make the path absolute
  69     wxPATH_NORM_LONG =     0x0020,  // make the path the long form
  70     wxPATH_NORM_SHORTCUT = 0x0040,  // resolve the shortcut, if it is a shortcut
  71     wxPATH_NORM_ALL      = 0x00ff & ~wxPATH_NORM_CASE
  72 };
  73
  74 // what exactly should GetPath() return?
  75 enum
  76 {
  77     wxPATH_GET_VOLUME    = 0x0001,  // include the volume if applicable
  78     wxPATH_GET_SEPARATOR = 0x0002   // terminate the path with the separator
  79 };
  80
  81 // MkDir flags
  82 enum
  83 {
  84     wxPATH_MKDIR_FULL    = 0x0001   // create directories recursively
  85 };
  86
  87 // error code of wxFileName::GetSize()
  88 extern wxULongLong wxInvalidSize;
  89
  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                 bool hasExt,
 144                 wxPathFormat format = wxPATH_NATIVE);
 145
 146     void Assign(const wxString& volume,
 147                 const wxString& path,
 148                 const wxString& name,
 149                 const wxString& ext,
 150                 wxPathFormat format = wxPATH_NATIVE)
 151         { Assign(volume, path, name, ext, !ext.empty(), format); }
 152
 153     void Assign(const wxString& path,
 154                 const wxString& name,
 155                 wxPathFormat format = wxPATH_NATIVE);
 156
 157     void Assign(const wxString& path,
 158                 const wxString& name,
 159                 const wxString& ext,
 160                 wxPathFormat format = wxPATH_NATIVE);
 161
 162     void AssignDir(const wxString& dir, wxPathFormat format = wxPATH_NATIVE);
 163
 164         // assorted assignment operators
 165
 166     wxFileName& operator=(const wxFileName& filename)
 167         { Assign(filename); return *this; }
 168
 169     wxFileName& operator=(const wxString& filename)
 170         { Assign(filename); return *this; }
 171
 172         // reset all components to default, uninitialized state
 173     void Clear();
 174
 175         // static pseudo constructors
 176     static wxFileName FileName(const wxString& file,
 177                                wxPathFormat format = wxPATH_NATIVE);
 178     static wxFileName DirName(const wxString& dir,
 179                               wxPathFormat format = wxPATH_NATIVE);
 180
 181     // file tests
 182
 183         // is the filename valid at all?
 184     bool IsOk() const
 185     {
 186         // we're fine if we have the path or the name or if we're a root dir
 187         return m_dirs.size() != 0 || !m_name.empty() || !m_relative ||
 188                 !m_ext.empty() || m_hasExt;
 189     }
 190
 191         // does the file with this name exists?
 192     bool FileExists() const;
 193     static bool FileExists( const wxString &file );
 194
 195         // does the directory with this name exists?
 196     bool DirExists() const;
 197     static bool DirExists( const wxString &dir );
 198
 199         // checks on most common flags for files/directories;
 200         // more platform-specific features (like e.g. Unix permissions) are not
 201         // available in wxFileName
 202
 203     bool IsDirWritable() const { return wxIsWritable(GetPath()); }
 204     static bool IsDirWritable(const wxString &path) { return wxDirExists(path) && wxIsWritable(path); }
 205
 206     bool IsDirReadable() const { return wxIsReadable(GetPath()); }
 207     static bool IsDirReadable(const wxString &path) { return wxDirExists(path) && wxIsReadable(path); }
 208
 209     // NOTE: IsDirExecutable() is not present because the meaning of "executable"
 210     //       directory is very platform-dependent and also not so useful
 211
 212     bool IsFileWritable() const { return wxIsWritable(GetFullPath()); }
 213     static bool IsFileWritable(const wxString &path) { return wxFileExists(path) && wxIsWritable(path); }
 214
 215     bool IsFileReadable() const { return wxIsReadable(GetFullPath()); }
 216     static bool IsFileReadable(const wxString &path) { return wxFileExists(path) && wxIsReadable(path); }
 217
 218     bool IsFileExecutable() const { return wxIsExecutable(GetFullPath()); }
 219     static bool IsFileExecutable(const wxString &path) { return wxFileExists(path) && wxIsExecutable(path); }
 220
 221
 222     // time functions
 223 #if wxUSE_DATETIME
 224         // set the file last access/mod and creation times
 225         // (any of the pointers may be NULL)
 226     bool SetTimes(const wxDateTime *dtAccess,
 227                   const wxDateTime *dtMod,
 228                   const wxDateTime *dtCreate);
 229
 230         // set the access and modification times to the current moment
 231     bool Touch();
 232
 233         // return the last access, last modification and create times
 234         // (any of the pointers may be NULL)
 235     bool GetTimes(wxDateTime *dtAccess,
 236                   wxDateTime *dtMod,
 237                   wxDateTime *dtCreate) const;
 238
 239         // convenience wrapper: get just the last mod time of the file
 240     wxDateTime GetModificationTime() const
 241     {
 242         wxDateTime dtMod;
 243         (void)GetTimes(NULL, &dtMod, NULL);
 244         return dtMod;
 245     }
 246 #endif // wxUSE_DATETIME
 247
 248 #ifdef __WXMAC__
 249     bool MacSetTypeAndCreator( wxUint32 type , wxUint32 creator ) ;
 250     bool MacGetTypeAndCreator( wxUint32 *type , wxUint32 *creator ) ;
 251     // gets the 'common' type and creator for a certain extension
 252     static bool MacFindDefaultTypeAndCreator( const wxString& ext , wxUint32 *type , wxUint32 *creator ) ;
 253     // registers application defined extensions and their default type and creator
 254     static void MacRegisterDefaultTypeAndCreator( const wxString& ext , wxUint32 type , wxUint32 creator ) ;
 255     // looks up the appropriate type and creator from the registration and then sets
 256     bool MacSetDefaultTypeAndCreator() ;
 257 #endif
 258
 259     // various file/dir operations
 260
 261         // retrieve the value of the current working directory
 262     void AssignCwd(const wxString& volume = wxEmptyString);
 263     static wxString GetCwd(const wxString& volume = wxEmptyString);
 264
 265         // change the current working directory
 266     bool SetCwd();
 267     static bool SetCwd( const wxString &cwd );
 268
 269         // get the value of user home (Unix only mainly)
 270     void AssignHomeDir();
 271     static wxString GetHomeDir();
 272
 273 #if wxUSE_FILE || wxUSE_FFILE
 274         // get a temp file name starting with the specified prefix
 275     void AssignTempFileName(const wxString& prefix);
 276     static wxString CreateTempFileName(const wxString& prefix);
 277 #endif // wxUSE_FILE
 278
 279 #if wxUSE_FILE
 280         // get a temp file name starting with the specified prefix and open the
 281         // file passed to us using this name for writing (atomically if
 282         // possible)
 283     void AssignTempFileName(const wxString& prefix, wxFile *fileTemp);
 284     static wxString CreateTempFileName(const wxString& prefix,
 285                                        wxFile *fileTemp);
 286 #endif // wxUSE_FILE
 287
 288 #if wxUSE_FFILE
 289         // get a temp file name starting with the specified prefix and open the
 290         // file passed to us using this name for writing (atomically if
 291         // possible)
 292     void AssignTempFileName(const wxString& prefix, wxFFile *fileTemp);
 293     static wxString CreateTempFileName(const wxString& prefix,
 294                                        wxFFile *fileTemp);
 295 #endif // wxUSE_FFILE
 296
 297     // directory creation and removal.
 298     bool Mkdir( int perm = 0777, int flags = 0);
 299     static bool Mkdir( const wxString &dir, int perm = 0777, int flags = 0 );
 300
 301     bool Rmdir();
 302     static bool Rmdir( const wxString &dir );
 303
 304     // operations on the path
 305
 306         // normalize the path: with the default flags value, the path will be
 307         // made absolute, without any ".." and "." and all environment
 308         // variables will be expanded in it
 309         //
 310         // this may be done using another (than current) value of cwd
 311     bool Normalize(int flags = wxPATH_NORM_ALL,
 312                    const wxString& cwd = wxEmptyString,
 313                    wxPathFormat format = wxPATH_NATIVE);
 314
 315         // get a path path relative to the given base directory, i.e. opposite
 316         // of Normalize
 317         //
 318         // pass an empty string to get a path relative to the working directory
 319         //
 320         // returns true if the file name was modified, false if we failed to do
 321         // anything with it (happens when the file is on a different volume,
 322         // for example)
 323     bool MakeRelativeTo(const wxString& pathBase = wxEmptyString,
 324                         wxPathFormat format = wxPATH_NATIVE);
 325
 326         // make the path absolute
 327         //
 328         // this may be done using another (than current) value of cwd
 329     bool MakeAbsolute(const wxString& cwd = wxEmptyString,
 330                       wxPathFormat format = wxPATH_NATIVE)
 331         { return Normalize(wxPATH_NORM_DOTS | wxPATH_NORM_ABSOLUTE |
 332                            wxPATH_NORM_TILDE, cwd, format); }
 333
 334 #if defined(__WIN32__) && !defined(__WXWINCE__) && wxUSE_OLE
 335         // if the path is a shortcut, return the target and optionally,
 336         // the arguments
 337     bool GetShortcutTarget(const wxString& shortcutPath,
 338                            wxString& targetFilename,
 339                            wxString* arguments = NULL);
 340 #endif
 341
 342     // Comparison
 343
 344         // compares with the rules of the given platforms format
 345     bool SameAs(const wxFileName& filepath,
 346                 wxPathFormat format = wxPATH_NATIVE) const;
 347
 348         // compare with another filename object
 349     bool operator==(const wxFileName& filename) const
 350         { return SameAs(filename); }
 351     bool operator!=(const wxFileName& filename) const
 352         { return !SameAs(filename); }
 353
 354         // compare with a filename string interpreted as a native file name
 355     bool operator==(const wxString& filename) const
 356         { return SameAs(wxFileName(filename)); }
 357     bool operator!=(const wxString& filename) const
 358         { return !SameAs(wxFileName(filename)); }
 359
 360         // are the file names of this type cases sensitive?
 361     static bool IsCaseSensitive( wxPathFormat format = wxPATH_NATIVE );
 362
 363         // is this filename absolute?
 364     bool IsAbsolute(wxPathFormat format = wxPATH_NATIVE) const;
 365
 366         // is this filename relative?
 367     bool IsRelative(wxPathFormat format = wxPATH_NATIVE) const
 368         { return !IsAbsolute(format); }
 369
 370     // Returns the characters that aren't allowed in filenames
 371     // on the specified platform.
 372     static wxString GetForbiddenChars(wxPathFormat format = wxPATH_NATIVE);
 373
 374     // Information about path format
 375
 376     // get the string separating the volume from the path for this format,
 377     // return an empty string if this format doesn't support the notion of
 378     // volumes at all
 379     static wxString GetVolumeSeparator(wxPathFormat format = wxPATH_NATIVE);
 380
 381     // get the string of path separators for this format
 382     static wxString GetPathSeparators(wxPathFormat format = wxPATH_NATIVE);
 383
 384     // get the string of path terminators, i.e. characters which terminate the
 385     // path
 386     static wxString GetPathTerminators(wxPathFormat format = wxPATH_NATIVE);
 387
 388     // get the canonical path separator for this format
 389     static wxChar GetPathSeparator(wxPathFormat format = wxPATH_NATIVE)
 390         { return GetPathSeparators(format)[0u]; }
 391
 392     // is the char a path separator for this format?
 393     static bool IsPathSeparator(wxChar ch, wxPathFormat format = wxPATH_NATIVE);
 394
 395     // Dir accessors
 396     size_t GetDirCount() const { return m_dirs.size(); }
 397     void AppendDir(const wxString& dir);
 398     void PrependDir(const wxString& dir);
 399     void InsertDir(size_t before, const wxString& dir);
 400     void RemoveDir(size_t pos);
 401     void RemoveLastDir() { RemoveDir(GetDirCount() - 1); }
 402
 403     // Other accessors
 404     void SetExt( const wxString &ext )          { m_ext = ext; m_hasExt = !m_ext.empty(); }
 405     void ClearExt()                             { m_ext = wxEmptyString; m_hasExt = false; }
 406     void SetEmptyExt()                          { m_ext = wxT(""); m_hasExt = true; }
 407     wxString GetExt() const                     { return m_ext; }
 408     bool HasExt() const                         { return m_hasExt; }
 409
 410     void SetName( const wxString &name )        { m_name = name; }
 411     wxString GetName() const                    { return m_name; }
 412     bool HasName() const                        { return !m_name.empty(); }
 413
 414     void SetVolume( const wxString &volume )    { m_volume = volume; }
 415     wxString GetVolume() const                  { return m_volume; }
 416     bool HasVolume() const                      { return !m_volume.empty(); }
 417
 418     // full name is the file name + extension (but without the path)
 419     void SetFullName(const wxString& fullname);
 420     wxString GetFullName() const;
 421
 422     const wxArrayString& GetDirs() const        { return m_dirs; }
 423
 424     // flags are combination of wxPATH_GET_XXX flags
 425     wxString GetPath(int flags = wxPATH_GET_VOLUME,
 426                      wxPathFormat format = wxPATH_NATIVE) const;
 427
 428     // Replace current path with this one
 429     void SetPath( const wxString &path, wxPathFormat format = wxPATH_NATIVE );
 430
 431     // Construct full path with name and ext
 432     wxString GetFullPath( wxPathFormat format = wxPATH_NATIVE ) const;
 433
 434     // Return the short form of the path (returns identity on non-Windows platforms)
 435     wxString GetShortPath() const;
 436
 437     // Return the long form of the path (returns identity on non-Windows platforms)
 438     wxString GetLongPath() const;
 439
 440     // Is this a file or directory (not necessarily an existing one)
 441     bool IsDir() const { return m_name.empty() && m_ext.empty(); }
 442
 443     // various helpers
 444
 445         // get the canonical path format for this platform
 446     static wxPathFormat GetFormat( wxPathFormat format = wxPATH_NATIVE );
 447
 448         // split a fullpath into the volume, path, (base) name and extension
 449         // (all of the pointers can be NULL)
 450     static void SplitPath(const wxString& fullpath,
 451                           wxString *volume,
 452                           wxString *path,
 453                           wxString *name,
 454                           wxString *ext,
 455                           bool *hasExt = NULL,
 456                           wxPathFormat format = wxPATH_NATIVE);
 457
 458     static void SplitPath(const wxString& fullpath,
 459                           wxString *volume,
 460                           wxString *path,
 461                           wxString *name,
 462                           wxString *ext,
 463                           wxPathFormat format)
 464     {
 465         SplitPath(fullpath, volume, path, name, ext, NULL, format);
 466     }
 467
 468         // compatibility version: volume is part of path
 469     static void SplitPath(const wxString& fullpath,
 470                           wxString *path,
 471                           wxString *name,
 472                           wxString *ext,
 473                           wxPathFormat format = wxPATH_NATIVE);
 474
 475         // split a path into volume and pure path part
 476     static void SplitVolume(const wxString& fullpathWithVolume,
 477                             wxString *volume,
 478                             wxString *path,
 479                             wxPathFormat format = wxPATH_NATIVE);
 480
 481     // Filesize
 482
 483         // returns the size of the given filename
 484     wxULongLong GetSize() const;
 485     static wxULongLong GetSize(const wxString &file);
 486
 487         // returns the size in a human readable form
 488     wxString GetHumanReadableSize(const wxString &nullsize = wxGetTranslation(_T("Not available")),
 489                                   int precision = 1) const;
 490     static wxString GetHumanReadableSize(const wxULongLong &sz,
 491                                          const wxString &nullsize = wxGetTranslation(_T("Not available")),
 492                                          int precision = 1);
 493
 494
 495     // deprecated methods, don't use any more
 496     // --------------------------------------
 497
 498 #ifndef __DIGITALMARS__
 499     wxString GetPath( bool withSep, wxPathFormat format = wxPATH_NATIVE ) const
 500         { return GetPath(withSep ? wxPATH_GET_SEPARATOR : 0, format); }
 501 #endif
 502     wxString GetPathWithSep(wxPathFormat format = wxPATH_NATIVE ) const
 503         { return GetPath(wxPATH_GET_VOLUME | wxPATH_GET_SEPARATOR, format); }
 504
 505 private:
 506     // check whether this dir is valid for Append/Prepend/InsertDir()
 507     static bool IsValidDirComponent(const wxString& dir);
 508
 509     // the drive/volume/device specification (always empty for Unix)
 510     wxString        m_volume;
 511
 512     // the path components of the file
 513     wxArrayString   m_dirs;
 514
 515     // the file name and extension (empty for directories)
 516     wxString        m_name,
 517                     m_ext;
 518
 519     // when m_dirs is empty it may mean either that we have no path at all or
 520     // that our path is '/', i.e. the root directory
 521     //
 522     // we use m_relative to distinguish between these two cases, it will be
 523     // true in the former and false in the latter
 524     //
 525     // NB: the path is not absolute just because m_relative is false, it still
 526     //     needs the drive (i.e. volume) in some formats (Windows)
 527     bool            m_relative;
 528
 529     // when m_ext is empty, it may be because we don't have any extension or
 530     // because we have an empty extension
 531     //
 532     // the difference is important as file with name "foo" and without
 533     // extension has full name "foo" while with empty extension it is "foo."
 534     bool            m_hasExt;
 535 };
 536
 537 #endif // _WX_FILENAME_H_
 538