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 #include "wx/longlong.h"
  31
  32 #if wxUSE_FILE
  33 class WXDLLIMPEXP_FWD_BASE wxFile;
  34 #endif
  35
  36 #if wxUSE_FFILE
  37 class WXDLLIMPEXP_FWD_BASE wxFFile;
  38 #endif
  39
  40 // ----------------------------------------------------------------------------
  41 // constants
  42 // ----------------------------------------------------------------------------
  43
  44 // the various values for the path format: this mainly affects the path
  45 // separator but also whether or not the path has the drive part (as under
  46 // Windows)
  47 enum wxPathFormat
  48 {
  49     wxPATH_NATIVE = 0,      // the path format for the current platform
  50     wxPATH_UNIX,
  51     wxPATH_BEOS = wxPATH_UNIX,
  52     wxPATH_MAC,
  53     wxPATH_DOS,
  54     wxPATH_WIN = wxPATH_DOS,
  55     wxPATH_OS2 = wxPATH_DOS,
  56     wxPATH_VMS,
  57
  58     wxPATH_MAX // Not a valid value for specifying path format
  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_SHORTCUT = 0x0040,  // resolve the shortcut, if it is a shortcut
  72     wxPATH_NORM_ALL      = 0x00ff & ~wxPATH_NORM_CASE
  73 };
  74
  75 // what exactly should GetPath() return?
  76 enum
  77 {
  78     wxPATH_GET_VOLUME    = 0x0001,  // include the volume if applicable
  79     wxPATH_GET_SEPARATOR = 0x0002   // terminate the path with the separator
  80 };
  81
  82 // MkDir flags
  83 enum
  84 {
  85     wxPATH_MKDIR_FULL    = 0x0001   // create directories recursively
  86 };
  87
  88 #if wxUSE_LONGLONG
  89 // error code of wxFileName::GetSize()
  90 extern wxULongLong wxInvalidSize;
  91 #endif // wxUSE_LONGLONG
  92
  93
  94
  95 // ----------------------------------------------------------------------------
  96 // wxFileName: encapsulates a file path
  97 // ----------------------------------------------------------------------------
  98
  99 class WXDLLIMPEXP_BASE wxFileName
 100 {
 101 public:
 102     // constructors and assignment
 103
 104         // the usual stuff
 105     wxFileName() { Clear(); }
 106     wxFileName(const wxFileName& filepath) { Assign(filepath); }
 107
 108         // from a full filename: if it terminates with a '/', a directory path
 109         // is contructed (the name will be empty), otherwise a file name and
 110         // extension are extracted from it
 111     wxFileName( const wxString& fullpath, wxPathFormat format = wxPATH_NATIVE )
 112         { Assign( fullpath, format ); }
 113
 114         // from a directory name and a file name
 115     wxFileName(const wxString& path,
 116                const wxString& name,
 117                wxPathFormat format = wxPATH_NATIVE)
 118         { Assign(path, name, format); }
 119
 120         // from a volume, directory name, file base name and extension
 121     wxFileName(const wxString& volume,
 122                const wxString& path,
 123                const wxString& name,
 124                const wxString& ext,
 125                wxPathFormat format = wxPATH_NATIVE)
 126         { Assign(volume, path, name, ext, format); }
 127
 128         // from a directory name, file base name and extension
 129     wxFileName(const wxString& path,
 130                const wxString& name,
 131                const wxString& ext,
 132                wxPathFormat format = wxPATH_NATIVE)
 133         { Assign(path, name, ext, format); }
 134
 135         // the same for delayed initialization
 136
 137     void Assign(const wxFileName& filepath);
 138
 139     void Assign(const wxString& fullpath,
 140                 wxPathFormat format = wxPATH_NATIVE);
 141
 142     void Assign(const wxString& volume,
 143                 const wxString& path,
 144                 const wxString& name,
 145                 const wxString& ext,
 146                 bool hasExt,
 147                 wxPathFormat format = wxPATH_NATIVE);
 148
 149     void Assign(const wxString& volume,
 150                 const wxString& path,
 151                 const wxString& name,
 152                 const wxString& ext,
 153                 wxPathFormat format = wxPATH_NATIVE)
 154         { Assign(volume, path, name, ext, !ext.empty(), format); }
 155
 156     void Assign(const wxString& path,
 157                 const wxString& name,
 158                 wxPathFormat format = wxPATH_NATIVE);
 159
 160     void Assign(const wxString& path,
 161                 const wxString& name,
 162                 const wxString& ext,
 163                 wxPathFormat format = wxPATH_NATIVE);
 164
 165     void AssignDir(const wxString& dir, wxPathFormat format = wxPATH_NATIVE);
 166
 167         // assorted assignment operators
 168
 169     wxFileName& operator=(const wxFileName& filename)
 170         { Assign(filename); return *this; }
 171
 172     wxFileName& operator=(const wxString& filename)
 173         { Assign(filename); return *this; }
 174
 175         // reset all components to default, uninitialized state
 176     void Clear();
 177
 178         // static pseudo constructors
 179     static wxFileName FileName(const wxString& file,
 180                                wxPathFormat format = wxPATH_NATIVE);
 181     static wxFileName DirName(const wxString& dir,
 182                               wxPathFormat format = wxPATH_NATIVE);
 183
 184     // file tests
 185
 186         // is the filename valid at all?
 187     bool IsOk() const
 188     {
 189         // we're fine if we have the path or the name or if we're a root dir
 190         return m_dirs.size() != 0 || !m_name.empty() || !m_relative ||
 191                 !m_ext.empty() || m_hasExt;
 192     }
 193
 194         // does the file with this name exists?
 195     bool FileExists() const;
 196     static bool FileExists( const wxString &file );
 197
 198         // does the directory with this name exists?
 199     bool DirExists() const;
 200     static bool DirExists( const wxString &dir );
 201
 202         // checks on most common flags for files/directories;
 203         // more platform-specific features (like e.g. Unix permissions) are not
 204         // available in wxFileName
 205
 206     bool IsDirWritable() const { return wxIsWritable(GetPath()); }
 207     static bool IsDirWritable(const wxString &path) { return wxDirExists(path) && wxIsWritable(path); }
 208
 209     bool IsDirReadable() const { return wxIsReadable(GetPath()); }
 210     static bool IsDirReadable(const wxString &path) { return wxDirExists(path) && wxIsReadable(path); }
 211
 212     // NOTE: IsDirExecutable() is not present because the meaning of "executable"
 213     //       directory is very platform-dependent and also not so useful
 214
 215     bool IsFileWritable() const { return wxIsWritable(GetFullPath()); }
 216     static bool IsFileWritable(const wxString &path) { return wxFileExists(path) && wxIsWritable(path); }
 217
 218     bool IsFileReadable() const { return wxIsReadable(GetFullPath()); }
 219     static bool IsFileReadable(const wxString &path) { return wxFileExists(path) && wxIsReadable(path); }
 220
 221     bool IsFileExecutable() const { return wxIsExecutable(GetFullPath()); }
 222     static bool IsFileExecutable(const wxString &path) { return wxFileExists(path) && wxIsExecutable(path); }
 223
 224
 225     // time functions
 226 #if wxUSE_DATETIME
 227         // set the file last access/mod and creation times
 228         // (any of the pointers may be NULL)
 229     bool SetTimes(const wxDateTime *dtAccess,
 230                   const wxDateTime *dtMod,
 231                   const wxDateTime *dtCreate);
 232
 233         // set the access and modification times to the current moment
 234     bool Touch();
 235
 236         // return the last access, last modification and create times
 237         // (any of the pointers may be NULL)
 238     bool GetTimes(wxDateTime *dtAccess,
 239                   wxDateTime *dtMod,
 240                   wxDateTime *dtCreate) const;
 241
 242         // convenience wrapper: get just the last mod time of the file
 243     wxDateTime GetModificationTime() const
 244     {
 245         wxDateTime dtMod;
 246         (void)GetTimes(NULL, &dtMod, NULL);
 247         return dtMod;
 248     }
 249 #endif // wxUSE_DATETIME
 250
 251 #ifdef __WXMAC__
 252     bool MacSetTypeAndCreator( wxUint32 type , wxUint32 creator ) ;
 253     bool MacGetTypeAndCreator( wxUint32 *type , wxUint32 *creator ) ;
 254     // gets the 'common' type and creator for a certain extension
 255     static bool MacFindDefaultTypeAndCreator( const wxString& ext , wxUint32 *type , wxUint32 *creator ) ;
 256     // registers application defined extensions and their default type and creator
 257     static void MacRegisterDefaultTypeAndCreator( const wxString& ext , wxUint32 type , wxUint32 creator ) ;
 258     // looks up the appropriate type and creator from the registration and then sets
 259     bool MacSetDefaultTypeAndCreator() ;
 260 #endif
 261
 262     // various file/dir operations
 263
 264         // retrieve the value of the current working directory
 265     void AssignCwd(const wxString& volume = wxEmptyString);
 266     static wxString GetCwd(const wxString& volume = wxEmptyString);
 267
 268         // change the current working directory
 269     bool SetCwd();
 270     static bool SetCwd( const wxString &cwd );
 271
 272         // get the value of user home (Unix only mainly)
 273     void AssignHomeDir();
 274     static wxString GetHomeDir();
 275
 276         // get the system temporary directory
 277     static wxString GetTempDir();
 278
 279 #if wxUSE_FILE || wxUSE_FFILE
 280         // get a temp file name starting with the specified prefix
 281     void AssignTempFileName(const wxString& prefix);
 282     static wxString CreateTempFileName(const wxString& prefix);
 283 #endif // wxUSE_FILE
 284
 285 #if wxUSE_FILE
 286         // get a temp file name starting with the specified prefix and open the
 287         // file passed to us using this name for writing (atomically if
 288         // possible)
 289     void AssignTempFileName(const wxString& prefix, wxFile *fileTemp);
 290     static wxString CreateTempFileName(const wxString& prefix,
 291                                        wxFile *fileTemp);
 292 #endif // wxUSE_FILE
 293
 294 #if wxUSE_FFILE
 295         // get a temp file name starting with the specified prefix and open the
 296         // file passed to us using this name for writing (atomically if
 297         // possible)
 298     void AssignTempFileName(const wxString& prefix, wxFFile *fileTemp);
 299     static wxString CreateTempFileName(const wxString& prefix,
 300                                        wxFFile *fileTemp);
 301 #endif // wxUSE_FFILE
 302
 303     // directory creation and removal.
 304     bool Mkdir( int perm = 0777, int flags = 0);
 305     static bool Mkdir( const wxString &dir, int perm = 0777, int flags = 0 );
 306
 307     bool Rmdir();
 308     static bool Rmdir( const wxString &dir );
 309
 310     // operations on the path
 311
 312         // normalize the path: with the default flags value, the path will be
 313         // made absolute, without any ".." and "." and all environment
 314         // variables will be expanded in it
 315         //
 316         // this may be done using another (than current) value of cwd
 317     bool Normalize(int flags = wxPATH_NORM_ALL,
 318                    const wxString& cwd = wxEmptyString,
 319                    wxPathFormat format = wxPATH_NATIVE);
 320
 321         // get a path path relative to the given base directory, i.e. opposite
 322         // of Normalize
 323         //
 324         // pass an empty string to get a path relative to the working directory
 325         //
 326         // returns true if the file name was modified, false if we failed to do
 327         // anything with it (happens when the file is on a different volume,
 328         // for example)
 329     bool MakeRelativeTo(const wxString& pathBase = wxEmptyString,
 330                         wxPathFormat format = wxPATH_NATIVE);
 331
 332         // make the path absolute
 333         //
 334         // this may be done using another (than current) value of cwd
 335     bool MakeAbsolute(const wxString& cwd = wxEmptyString,
 336                       wxPathFormat format = wxPATH_NATIVE)
 337         { return Normalize(wxPATH_NORM_DOTS | wxPATH_NORM_ABSOLUTE |
 338                            wxPATH_NORM_TILDE, cwd, format); }
 339
 340 #if defined(__WIN32__) && !defined(__WXWINCE__) && wxUSE_OLE
 341         // if the path is a shortcut, return the target and optionally,
 342         // the arguments
 343     bool GetShortcutTarget(const wxString& shortcutPath,
 344                            wxString& targetFilename,
 345                            wxString* arguments = NULL);
 346 #endif
 347
 348     // Comparison
 349
 350         // compares with the rules of the given platforms format
 351     bool SameAs(const wxFileName& filepath,
 352                 wxPathFormat format = wxPATH_NATIVE) const;
 353
 354         // compare with another filename object
 355     bool operator==(const wxFileName& filename) const
 356         { return SameAs(filename); }
 357     bool operator!=(const wxFileName& filename) const
 358         { return !SameAs(filename); }
 359
 360         // compare with a filename string interpreted as a native file name
 361     bool operator==(const wxString& filename) const
 362         { return SameAs(wxFileName(filename)); }
 363     bool operator!=(const wxString& filename) const
 364         { return !SameAs(wxFileName(filename)); }
 365
 366         // are the file names of this type cases sensitive?
 367     static bool IsCaseSensitive( wxPathFormat format = wxPATH_NATIVE );
 368
 369         // is this filename absolute?
 370     bool IsAbsolute(wxPathFormat format = wxPATH_NATIVE) const;
 371
 372         // is this filename relative?
 373     bool IsRelative(wxPathFormat format = wxPATH_NATIVE) const
 374         { return !IsAbsolute(format); }
 375
 376     // Returns the characters that aren't allowed in filenames
 377     // on the specified platform.
 378     static wxString GetForbiddenChars(wxPathFormat format = wxPATH_NATIVE);
 379
 380     // Information about path format
 381
 382     // get the string separating the volume from the path for this format,
 383     // return an empty string if this format doesn't support the notion of
 384     // volumes at all
 385     static wxString GetVolumeSeparator(wxPathFormat format = wxPATH_NATIVE);
 386
 387     // get the string of path separators for this format
 388     static wxString GetPathSeparators(wxPathFormat format = wxPATH_NATIVE);
 389
 390     // get the string of path terminators, i.e. characters which terminate the
 391     // path
 392     static wxString GetPathTerminators(wxPathFormat format = wxPATH_NATIVE);
 393
 394     // get the canonical path separator for this format
 395     static wxUniChar GetPathSeparator(wxPathFormat format = wxPATH_NATIVE)
 396         { return GetPathSeparators(format)[0u]; }
 397
 398     // is the char a path separator for this format?
 399     static bool IsPathSeparator(wxChar ch, wxPathFormat format = wxPATH_NATIVE);
 400
 401     // Dir accessors
 402     size_t GetDirCount() const { return m_dirs.size(); }
 403     void AppendDir(const wxString& dir);
 404     void PrependDir(const wxString& dir);
 405     void InsertDir(size_t before, const wxString& dir);
 406     void RemoveDir(size_t pos);
 407     void RemoveLastDir() { RemoveDir(GetDirCount() - 1); }
 408
 409     // Other accessors
 410     void SetExt( const wxString &ext )          { m_ext = ext; m_hasExt = !m_ext.empty(); }
 411     void ClearExt()                             { m_ext = wxEmptyString; m_hasExt = false; }
 412     void SetEmptyExt()                          { m_ext = wxT(""); m_hasExt = true; }
 413     wxString GetExt() const                     { return m_ext; }
 414     bool HasExt() const                         { return m_hasExt; }
 415
 416     void SetName( const wxString &name )        { m_name = name; }
 417     wxString GetName() const                    { return m_name; }
 418     bool HasName() const                        { return !m_name.empty(); }
 419
 420     void SetVolume( const wxString &volume )    { m_volume = volume; }
 421     wxString GetVolume() const                  { return m_volume; }
 422     bool HasVolume() const                      { return !m_volume.empty(); }
 423
 424     // full name is the file name + extension (but without the path)
 425     void SetFullName(const wxString& fullname);
 426     wxString GetFullName() const;
 427
 428     const wxArrayString& GetDirs() const        { return m_dirs; }
 429
 430     // flags are combination of wxPATH_GET_XXX flags
 431     wxString GetPath(int flags = wxPATH_GET_VOLUME,
 432                      wxPathFormat format = wxPATH_NATIVE) const;
 433
 434     // Replace current path with this one
 435     void SetPath( const wxString &path, wxPathFormat format = wxPATH_NATIVE );
 436
 437     // Construct full path with name and ext
 438     wxString GetFullPath( wxPathFormat format = wxPATH_NATIVE ) const;
 439
 440     // Return the short form of the path (returns identity on non-Windows platforms)
 441     wxString GetShortPath() const;
 442
 443     // Return the long form of the path (returns identity on non-Windows platforms)
 444     wxString GetLongPath() const;
 445
 446     // Is this a file or directory (not necessarily an existing one)
 447     bool IsDir() const { return m_name.empty() && m_ext.empty(); }
 448
 449     // various helpers
 450
 451         // get the canonical path format for this platform
 452     static wxPathFormat GetFormat( wxPathFormat format = wxPATH_NATIVE );
 453
 454         // split a fullpath into the volume, path, (base) name and extension
 455         // (all of the pointers can be NULL)
 456     static void SplitPath(const wxString& fullpath,
 457                           wxString *volume,
 458                           wxString *path,
 459                           wxString *name,
 460                           wxString *ext,
 461                           bool *hasExt = NULL,
 462                           wxPathFormat format = wxPATH_NATIVE);
 463
 464     static void SplitPath(const wxString& fullpath,
 465                           wxString *volume,
 466                           wxString *path,
 467                           wxString *name,
 468                           wxString *ext,
 469                           wxPathFormat format)
 470     {
 471         SplitPath(fullpath, volume, path, name, ext, NULL, format);
 472     }
 473
 474         // compatibility version: volume is part of path
 475     static void SplitPath(const wxString& fullpath,
 476                           wxString *path,
 477                           wxString *name,
 478                           wxString *ext,
 479                           wxPathFormat format = wxPATH_NATIVE);
 480
 481         // split a path into volume and pure path part
 482     static void SplitVolume(const wxString& fullpathWithVolume,
 483                             wxString *volume,
 484                             wxString *path,
 485                             wxPathFormat format = wxPATH_NATIVE);
 486
 487     // Filesize
 488
 489 #if wxUSE_LONGLONG
 490         // returns the size of the given filename
 491     wxULongLong GetSize() const;
 492     static wxULongLong GetSize(const wxString &file);
 493
 494         // returns the size in a human readable form
 495     wxString GetHumanReadableSize(const wxString &nullsize = wxGetTranslation(_T("Not available")),
 496                                   int precision = 1) const;
 497     static wxString GetHumanReadableSize(const wxULongLong &sz,
 498                                          const wxString &nullsize = wxGetTranslation(_T("Not available")),
 499                                          int precision = 1);
 500 #endif // wxUSE_LONGLONG
 501
 502
 503     // deprecated methods, don't use any more
 504     // --------------------------------------
 505
 506 #ifndef __DIGITALMARS__
 507     wxString GetPath( bool withSep, wxPathFormat format = wxPATH_NATIVE ) const
 508         { return GetPath(withSep ? wxPATH_GET_SEPARATOR : 0, format); }
 509 #endif
 510     wxString GetPathWithSep(wxPathFormat format = wxPATH_NATIVE ) const
 511         { return GetPath(wxPATH_GET_VOLUME | wxPATH_GET_SEPARATOR, format); }
 512
 513 private:
 514     // check whether this dir is valid for Append/Prepend/InsertDir()
 515     static bool IsValidDirComponent(const wxString& dir);
 516
 517     // the drive/volume/device specification (always empty for Unix)
 518     wxString        m_volume;
 519
 520     // the path components of the file
 521     wxArrayString   m_dirs;
 522
 523     // the file name and extension (empty for directories)
 524     wxString        m_name,
 525                     m_ext;
 526
 527     // when m_dirs is empty it may mean either that we have no path at all or
 528     // that our path is '/', i.e. the root directory
 529     //
 530     // we use m_relative to distinguish between these two cases, it will be
 531     // true in the former and false in the latter
 532     //
 533     // NB: the path is not absolute just because m_relative is false, it still
 534     //     needs the drive (i.e. volume) in some formats (Windows)
 535     bool            m_relative;
 536
 537     // when m_ext is empty, it may be because we don't have any extension or
 538     // because we have an empty extension
 539     //
 540     // the difference is important as file with name "foo" and without
 541     // extension has full name "foo" while with empty extension it is "foo."
 542     bool            m_hasExt;
 543 };
 544
 545 #endif // _WX_FILENAME_H_
 546