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 #if wxUSE_FILE
  43 class WXDLLIMPEXP_BASE wxFile;
  44 #endif
  45
  46 // ----------------------------------------------------------------------------
  47 // constants
  48 // ----------------------------------------------------------------------------
  49
  50 // the various values for the path format: this mainly affects the path
  51 // separator but also whether or not the path has the drive part (as under
  52 // Windows)
  53 enum wxPathFormat
  54 {
  55     wxPATH_NATIVE = 0,      // the path format for the current platform
  56     wxPATH_UNIX,
  57     wxPATH_BEOS = wxPATH_UNIX,
  58     wxPATH_MAC,
  59     wxPATH_DOS,
  60     wxPATH_WIN = wxPATH_DOS,
  61     wxPATH_OS2 = wxPATH_DOS,
  62     wxPATH_VMS,
  63
  64     wxPATH_MAX // Not a valid value for specifying path format
  65 };
  66
  67 // the kind of normalization to do with the file name: these values can be
  68 // or'd together to perform several operations at once
  69 enum wxPathNormalize
  70 {
  71     wxPATH_NORM_ENV_VARS = 0x0001,  // replace env vars with their values
  72     wxPATH_NORM_DOTS     = 0x0002,  // squeeze all .. and . and prepend cwd
  73     wxPATH_NORM_TILDE    = 0x0004,  // Unix only: replace ~ and ~user
  74     wxPATH_NORM_CASE     = 0x0008,  // if case insensitive => tolower
  75     wxPATH_NORM_ABSOLUTE = 0x0010,  // make the path absolute
  76     wxPATH_NORM_LONG =     0x0020,  // make the path the long form
  77     wxPATH_NORM_SHORTCUT = 0x0040,  // resolve the shortcut, if it is a shortcut
  78     wxPATH_NORM_ALL      = 0x00ff & ~wxPATH_NORM_CASE
  79 };
  80
  81 // what exactly should GetPath() return?
  82 enum
  83 {
  84     wxPATH_GET_VOLUME    = 0x0001,  // include the volume if applicable
  85     wxPATH_GET_SEPARATOR = 0x0002   // terminate the path with the separator
  86 };
  87
  88 // MkDir flags
  89 enum
  90 {
  91     wxPATH_MKDIR_FULL    = 0x0001   // create directories recursively
  92 };
  93
  94 // ----------------------------------------------------------------------------
  95 // wxFileName: encapsulates a file path
  96 // ----------------------------------------------------------------------------
  97
  98 class WXDLLIMPEXP_BASE wxFileName
  99 {
 100 public:
 101     // constructors and assignment
 102
 103         // the usual stuff
 104     wxFileName() { Clear(); }
 105     wxFileName(const wxFileName& filepath) { Assign(filepath); }
 106
 107         // from a full filename: if it terminates with a '/', a directory path
 108         // is contructed (the name will be empty), otherwise a file name and
 109         // extension are extracted from it
 110     wxFileName( const wxString& fullpath, wxPathFormat format = wxPATH_NATIVE )
 111         { Assign( fullpath, format ); }
 112
 113         // from a directory name and a file name
 114     wxFileName(const wxString& path,
 115                const wxString& name,
 116                wxPathFormat format = wxPATH_NATIVE)
 117         { Assign(path, name, format); }
 118
 119         // from a volume, directory name, file base name and extension
 120     wxFileName(const wxString& volume,
 121                const wxString& path,
 122                const wxString& name,
 123                const wxString& ext,
 124                wxPathFormat format = wxPATH_NATIVE)
 125         { Assign(volume, path, name, ext, format); }
 126
 127         // from a directory name, file base name and extension
 128     wxFileName(const wxString& path,
 129                const wxString& name,
 130                const wxString& ext,
 131                wxPathFormat format = wxPATH_NATIVE)
 132         { Assign(path, name, ext, format); }
 133
 134         // the same for delayed initialization
 135
 136     void Assign(const wxFileName& filepath);
 137
 138     void Assign(const wxString& fullpath,
 139                 wxPathFormat format = wxPATH_NATIVE);
 140
 141     void Assign(const wxString& volume,
 142                 const wxString& path,
 143                 const wxString& name,
 144                 const wxString& ext,
 145                 bool hasExt,
 146                 wxPathFormat format = wxPATH_NATIVE);
 147
 148     void Assign(const wxString& volume,
 149                 const wxString& path,
 150                 const wxString& name,
 151                 const wxString& ext,
 152                 wxPathFormat format = wxPATH_NATIVE)
 153         { Assign(volume, path, name, ext, !ext.empty(), format); }
 154
 155     void Assign(const wxString& path,
 156                 const wxString& name,
 157                 wxPathFormat format = wxPATH_NATIVE);
 158
 159     void Assign(const wxString& path,
 160                 const wxString& name,
 161                 const wxString& ext,
 162                 wxPathFormat format = wxPATH_NATIVE);
 163
 164     void AssignDir(const wxString& dir, wxPathFormat format = wxPATH_NATIVE);
 165
 166         // assorted assignment operators
 167
 168     wxFileName& operator=(const wxFileName& filename)
 169         { Assign(filename); return *this; }
 170
 171     wxFileName& operator=(const wxString& filename)
 172         { Assign(filename); return *this; }
 173
 174         // reset all components to default, uninitialized state
 175     void Clear();
 176
 177         // static pseudo constructors
 178     static wxFileName FileName(const wxString& file,
 179                                wxPathFormat format = wxPATH_NATIVE);
 180     static wxFileName DirName(const wxString& dir,
 181                               wxPathFormat format = wxPATH_NATIVE);
 182
 183     // file tests
 184
 185         // is the filename valid at all?
 186     bool IsOk() const
 187     {
 188         // we're fine if we have the path or the name or if we're a root dir
 189         return m_dirs.size() != 0 || !m_name.IsEmpty() || !m_relative ||
 190                 !m_ext.empty() || m_hasExt;
 191     }
 192
 193         // does the file with this name exists?
 194     bool FileExists() const;
 195     static bool FileExists( const wxString &file );
 196
 197         // does the directory with this name exists?
 198     bool DirExists() const;
 199     static bool DirExists( const wxString &dir );
 200
 201         // VZ: also need: IsDirWritable(), IsFileExecutable() &c (TODO)
 202
 203     // time functions
 204 #if wxUSE_DATETIME
 205         // set the file last access/mod and creation times
 206         // (any of the pointers may be NULL)
 207     bool SetTimes(const wxDateTime *dtAccess,
 208                   const wxDateTime *dtMod,
 209                   const wxDateTime *dtCreate);
 210
 211         // set the access and modification times to the current moment
 212     bool Touch();
 213
 214         // return the last access, last modification and create times
 215         // (any of the pointers may be NULL)
 216     bool GetTimes(wxDateTime *dtAccess,
 217                   wxDateTime *dtMod,
 218                   wxDateTime *dtCreate) const;
 219
 220         // convenience wrapper: get just the last mod time of the file
 221     wxDateTime GetModificationTime() const
 222     {
 223         wxDateTime dtMod;
 224         (void)GetTimes(NULL, &dtMod, NULL);
 225         return dtMod;
 226     }
 227 #endif // wxUSE_DATETIME
 228
 229 #ifdef __WXMAC__
 230     bool MacSetTypeAndCreator( wxUint32 type , wxUint32 creator ) ;
 231     bool MacGetTypeAndCreator( wxUint32 *type , wxUint32 *creator ) ;
 232     // gets the 'common' type and creator for a certain extension
 233     static bool MacFindDefaultTypeAndCreator( const wxString& ext , wxUint32 *type , wxUint32 *creator ) ;
 234     // registers application defined extensions and their default type and creator
 235     static void MacRegisterDefaultTypeAndCreator( const wxString& ext , wxUint32 type , wxUint32 creator ) ;
 236     // looks up the appropriate type and creator from the registration and then sets
 237     bool MacSetDefaultTypeAndCreator() ;
 238 #endif
 239
 240     // various file/dir operations
 241
 242         // retrieve the value of the current working directory
 243     void AssignCwd(const wxString& volume = wxEmptyString);
 244     static wxString GetCwd(const wxString& volume = wxEmptyString);
 245
 246         // change the current working directory
 247     bool SetCwd();
 248     static bool SetCwd( const wxString &cwd );
 249
 250         // get the value of user home (Unix only mainly)
 251     void AssignHomeDir();
 252     static wxString GetHomeDir();
 253
 254 #if wxUSE_FILE
 255         // get a temp file name starting with the specified prefix and open the
 256         // file passed to us using this name for writing (atomically if
 257         // possible)
 258     void AssignTempFileName(const wxString& prefix, wxFile *fileTemp = NULL);
 259     static wxString CreateTempFileName(const wxString& prefix,
 260                                        wxFile *fileTemp = NULL);
 261 #endif // wxUSE_FILE
 262
 263     // directory creation and removal.
 264     bool Mkdir( int perm = 0777, int flags = 0);
 265     static bool Mkdir( const wxString &dir, int perm = 0777, int flags = 0 );
 266
 267     bool Rmdir();
 268     static bool Rmdir( const wxString &dir );
 269
 270     // operations on the path
 271
 272         // normalize the path: with the default flags value, the path will be
 273         // made absolute, without any ".." and "." and all environment
 274         // variables will be expanded in it
 275         //
 276         // this may be done using another (than current) value of cwd
 277     bool Normalize(int flags = wxPATH_NORM_ALL,
 278                    const wxString& cwd = wxEmptyString,
 279                    wxPathFormat format = wxPATH_NATIVE);
 280
 281         // get a path path relative to the given base directory, i.e. opposite
 282         // of Normalize
 283         //
 284         // pass an empty string to get a path relative to the working directory
 285         //
 286         // returns true if the file name was modified, false if we failed to do
 287         // anything with it (happens when the file is on a different volume,
 288         // for example)
 289     bool MakeRelativeTo(const wxString& pathBase = wxEmptyString,
 290                         wxPathFormat format = wxPATH_NATIVE);
 291
 292         // make the path absolute
 293         //
 294         // this may be done using another (than current) value of cwd
 295     bool MakeAbsolute(const wxString& cwd = wxEmptyString,
 296                       wxPathFormat format = wxPATH_NATIVE)
 297         { return Normalize(wxPATH_NORM_DOTS | wxPATH_NORM_ABSOLUTE |
 298                            wxPATH_NORM_TILDE, cwd, format); }
 299
 300 #if defined(__WIN32__) && !defined(__WXWINCE__) && wxUSE_OLE
 301         // if the path is a shortcut, return the target and optionally,
 302         // the arguments
 303     bool GetShortcutTarget(const wxString& shortcutPath,
 304                            wxString& targetFilename,
 305                            wxString* arguments = NULL);
 306 #endif
 307
 308     // Comparison
 309
 310         // compares with the rules of the given platforms format
 311     bool SameAs(const wxFileName& filepath,
 312                 wxPathFormat format = wxPATH_NATIVE) const;
 313
 314         // compare with another filename object
 315     bool operator==(const wxFileName& filename) const
 316         { return SameAs(filename); }
 317     bool operator!=(const wxFileName& filename) const
 318         { return !SameAs(filename); }
 319
 320         // compare with a filename string interpreted as a native file name
 321     bool operator==(const wxString& filename) const
 322         { return SameAs(wxFileName(filename)); }
 323     bool operator!=(const wxString& filename) const
 324         { return !SameAs(wxFileName(filename)); }
 325
 326         // are the file names of this type cases sensitive?
 327     static bool IsCaseSensitive( wxPathFormat format = wxPATH_NATIVE );
 328
 329         // is this filename absolute?
 330     bool IsAbsolute(wxPathFormat format = wxPATH_NATIVE) const;
 331
 332         // is this filename relative?
 333     bool IsRelative(wxPathFormat format = wxPATH_NATIVE) const
 334         { return !IsAbsolute(format); }
 335
 336     // Returns the characters that aren't allowed in filenames
 337     // on the specified platform.
 338     static wxString GetForbiddenChars(wxPathFormat format = wxPATH_NATIVE);
 339
 340     // Information about path format
 341
 342     // get the string separating the volume from the path for this format,
 343     // return an empty string if this format doesn't support the notion of
 344     // volumes at all
 345     static wxString GetVolumeSeparator(wxPathFormat format = wxPATH_NATIVE);
 346
 347     // get the string of path separators for this format
 348     static wxString GetPathSeparators(wxPathFormat format = wxPATH_NATIVE);
 349
 350     // get the string of path terminators, i.e. characters which terminate the
 351     // path
 352     static wxString GetPathTerminators(wxPathFormat format = wxPATH_NATIVE);
 353
 354     // get the canonical path separator for this format
 355     static wxChar GetPathSeparator(wxPathFormat format = wxPATH_NATIVE)
 356         { return GetPathSeparators(format)[0u]; }
 357
 358     // is the char a path separator for this format?
 359     static bool IsPathSeparator(wxChar ch, wxPathFormat format = wxPATH_NATIVE);
 360
 361     // Dir accessors
 362     size_t GetDirCount() const { return m_dirs.size(); }
 363     void AppendDir(const wxString& dir);
 364     void PrependDir(const wxString& dir);
 365     void InsertDir(size_t before, const wxString& dir);
 366     void RemoveDir(size_t pos);
 367     void RemoveLastDir() { RemoveDir(GetDirCount() - 1); }
 368
 369     // Other accessors
 370     void SetExt( const wxString &ext )          { m_ext = ext; m_hasExt = !m_ext.empty(); }
 371     void ClearExt()                             { m_ext = wxEmptyString; m_hasExt = false; }
 372     void SetEmptyExt()                          { m_ext = wxT(""); m_hasExt = true; }
 373     wxString GetExt() const                     { return m_ext; }
 374     bool HasExt() const                         { return m_hasExt; }
 375
 376     void SetName( const wxString &name )        { m_name = name; }
 377     wxString GetName() const                    { return m_name; }
 378     bool HasName() const                        { return !m_name.empty(); }
 379
 380     void SetVolume( const wxString &volume )    { m_volume = volume; }
 381     wxString GetVolume() const                  { return m_volume; }
 382     bool HasVolume() const                      { return !m_volume.empty(); }
 383
 384     // full name is the file name + extension (but without the path)
 385     void SetFullName(const wxString& fullname);
 386     wxString GetFullName() const;
 387
 388     const wxArrayString& GetDirs() const        { return m_dirs; }
 389
 390     // flags are combination of wxPATH_GET_XXX flags
 391     wxString GetPath(int flags = wxPATH_GET_VOLUME,
 392                      wxPathFormat format = wxPATH_NATIVE) const;
 393
 394     // Replace current path with this one
 395     void SetPath( const wxString &path, wxPathFormat format = wxPATH_NATIVE );
 396
 397     // Construct full path with name and ext
 398     wxString GetFullPath( wxPathFormat format = wxPATH_NATIVE ) const;
 399
 400     // Return the short form of the path (returns identity on non-Windows platforms)
 401     wxString GetShortPath() const;
 402
 403     // Return the long form of the path (returns identity on non-Windows platforms)
 404     wxString GetLongPath() const;
 405
 406     // Is this a file or directory (not necessarily an existing one)
 407     bool IsDir() const { return m_name.empty() && m_ext.empty(); }
 408
 409     // various helpers
 410
 411         // get the canonical path format for this platform
 412     static wxPathFormat GetFormat( wxPathFormat format = wxPATH_NATIVE );
 413
 414         // split a fullpath into the volume, path, (base) name and extension
 415         // (all of the pointers can be NULL)
 416     static void SplitPath(const wxString& fullpath,
 417                           wxString *volume,
 418                           wxString *path,
 419                           wxString *name,
 420                           wxString *ext,
 421                           bool *hasExt = NULL,
 422                           wxPathFormat format = wxPATH_NATIVE);
 423
 424     static void SplitPath(const wxString& fullpath,
 425                           wxString *volume,
 426                           wxString *path,
 427                           wxString *name,
 428                           wxString *ext,
 429                           wxPathFormat format)
 430     {
 431         SplitPath(fullpath, volume, path, name, ext, NULL, format);
 432     }
 433
 434         // compatibility version: volume is part of path
 435     static void SplitPath(const wxString& fullpath,
 436                           wxString *path,
 437                           wxString *name,
 438                           wxString *ext,
 439                           wxPathFormat format = wxPATH_NATIVE);
 440
 441         // split a path into volume and pure path part
 442     static void SplitVolume(const wxString& fullpathWithVolume,
 443                             wxString *volume,
 444                             wxString *path,
 445                             wxPathFormat format = wxPATH_NATIVE);
 446
 447     // deprecated methods, don't use any more
 448     // --------------------------------------
 449
 450 #ifndef __DIGITALMARS__
 451     wxString GetPath( bool withSep, wxPathFormat format = wxPATH_NATIVE ) const
 452         { return GetPath(withSep ? wxPATH_GET_SEPARATOR : 0, format); }
 453 #endif
 454     wxString GetPathWithSep(wxPathFormat format = wxPATH_NATIVE ) const
 455         { return GetPath(wxPATH_GET_SEPARATOR, format); }
 456
 457 private:
 458     // check whether this dir is valid for Append/Prepend/InsertDir()
 459     static bool IsValidDirComponent(const wxString& dir);
 460
 461     // the drive/volume/device specification (always empty for Unix)
 462     wxString        m_volume;
 463
 464     // the path components of the file
 465     wxArrayString   m_dirs;
 466
 467     // the file name and extension (empty for directories)
 468     wxString        m_name,
 469                     m_ext;
 470
 471     // when m_dirs is empty it may mean either that we have no path at all or
 472     // that our path is '/', i.e. the root directory
 473     //
 474     // we use m_relative to distinguish between these two cases, it will be
 475     // true in the former and false in the latter
 476     //
 477     // NB: the path is not absolute just because m_relative is false, it still
 478     //     needs the drive (i.e. volume) in some formats (Windows)
 479     bool            m_relative;
 480
 481     // when m_ext is empty, it may be because we don't have any extension or
 482     // because we have an empty extension
 483     //
 484     // the difference is important as file with name "foo" and without
 485     // extension has full name "foo" while with empty extension it is "foo."
 486     bool            m_hasExt;
 487 };
 488
 489 #endif // _WX_FILENAME_H_
 490