wxWidgets/include/wx/filename.h
Vadim Zeitlin f37d449208 Add convenient wxFileName::GetAbsolutePath() wrapper and use it
This wrapper simply combines the calls to MakeAbsolute() and
GetFullPath(), but using it results in shorter and more clear code, so
it seems to be worth having.
2021-07-11 14:51:31 +01:00

664 lines
26 KiB
C++

/////////////////////////////////////////////////////////////////////////////
// Name: wx/filename.h
// Purpose: wxFileName - encapsulates a file path
// Author: Robert Roebling, Vadim Zeitlin
// Modified by:
// Created: 28.12.00
// Copyright: (c) 2000 Robert Roebling
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_FILENAME_H_
#define _WX_FILENAME_H_
#include "wx/arrstr.h"
#include "wx/filefn.h"
#include "wx/datetime.h"
#include "wx/intl.h"
#include "wx/longlong.h"
#include "wx/file.h"
#if wxUSE_FILE
class WXDLLIMPEXP_FWD_BASE wxFile;
#endif
#if wxUSE_FFILE
class WXDLLIMPEXP_FWD_BASE wxFFile;
#endif
// this symbol is defined for the platforms where file systems use volumes in
// paths
#if defined(__WINDOWS__)
#define wxHAS_FILESYSTEM_VOLUMES
#endif
// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------
// the various values for the path format: this mainly affects the path
// separator but also whether or not the path has the drive part (as under
// Windows)
enum wxPathFormat
{
wxPATH_NATIVE = 0, // the path format for the current platform
wxPATH_UNIX,
wxPATH_BEOS = wxPATH_UNIX,
wxPATH_MAC,
wxPATH_DOS,
wxPATH_WIN = wxPATH_DOS,
wxPATH_OS2 = wxPATH_DOS,
wxPATH_VMS,
wxPATH_MAX // Not a valid value for specifying path format
};
// different conventions that may be used with GetHumanReadableSize()
enum wxSizeConvention
{
wxSIZE_CONV_TRADITIONAL, // 1024 bytes = 1 KB
wxSIZE_CONV_IEC, // 1024 bytes = 1 KiB
wxSIZE_CONV_SI // 1000 bytes = 1 KB
};
// the kind of normalization to do with the file name: these values can be
// or'd together to perform several operations at once
enum wxPathNormalize
{
wxPATH_NORM_ENV_VARS = 0x0001, // replace env vars with their values
wxPATH_NORM_DOTS = 0x0002, // squeeze all .. and .
wxPATH_NORM_TILDE = 0x0004, // Unix only: replace ~ and ~user
wxPATH_NORM_CASE = 0x0008, // if case insensitive => tolower
wxPATH_NORM_ABSOLUTE = 0x0010, // make the path absolute
wxPATH_NORM_LONG = 0x0020, // make the path the long form (MSW-only)
wxPATH_NORM_SHORTCUT = 0x0040, // resolve the shortcut, if it is a shortcut
// Don't use this constant, it used to correspond to the default
// Normalize() behaviour but this is deprecated now.
wxPATH_NORM_DEPR_OLD_DEFAULT= 0x00ff & ~wxPATH_NORM_CASE,
// This constant name is misleading, as it doesn't really include all the
// flags above, so its use is discouraged, please use the flags you want
// explicitly instead.
wxPATH_NORM_ALL
wxDEPRECATED_ATTR("specify the wanted flags explicitly to avoid surprises")
= wxPATH_NORM_DEPR_OLD_DEFAULT
};
// what exactly should GetPath() return?
enum
{
wxPATH_NO_SEPARATOR = 0x0000, // for symmetry with wxPATH_GET_SEPARATOR
wxPATH_GET_VOLUME = 0x0001, // include the volume if applicable
wxPATH_GET_SEPARATOR = 0x0002 // terminate the path with the separator
};
// Mkdir flags
enum
{
wxPATH_MKDIR_FULL = 0x0001 // create directories recursively
};
// Rmdir flags
enum
{
wxPATH_RMDIR_FULL = 0x0001, // delete with subdirectories if empty
wxPATH_RMDIR_RECURSIVE = 0x0002 // delete all recursively (dangerous!)
};
// FileExists flags
enum
{
wxFILE_EXISTS_REGULAR = 0x0001, // check for existence of a regular file
wxFILE_EXISTS_DIR = 0x0002, // check for existence of a directory
wxFILE_EXISTS_SYMLINK = 0x1004, // check for existence of a symbolic link;
// also sets wxFILE_EXISTS_NO_FOLLOW as
// it would never be satisfied otherwise
wxFILE_EXISTS_DEVICE = 0x0008, // check for existence of a device
wxFILE_EXISTS_FIFO = 0x0010, // check for existence of a FIFO
wxFILE_EXISTS_SOCKET = 0x0020, // check for existence of a socket
// gap for future types
wxFILE_EXISTS_NO_FOLLOW = 0x1000, // don't dereference a contained symlink
wxFILE_EXISTS_ANY = 0x1FFF // check for existence of anything
};
#if wxUSE_LONGLONG
// error code of wxFileName::GetSize()
extern WXDLLIMPEXP_DATA_BASE(const wxULongLong) wxInvalidSize;
#endif // wxUSE_LONGLONG
// ----------------------------------------------------------------------------
// wxFileName: encapsulates a file path
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_BASE wxFileName
{
public:
// constructors and assignment
// the usual stuff
wxFileName() { Clear(); }
wxFileName(const wxFileName& filepath) { Assign(filepath); }
// from a full filename: if it terminates with a '/', a directory path
// is constructed (the name will be empty), otherwise a file name and
// extension are extracted from it
wxFileName( const wxString& fullpath, wxPathFormat format = wxPATH_NATIVE )
{ Assign( fullpath, format ); m_dontFollowLinks = false; }
// from a directory name and a file name
wxFileName(const wxString& path,
const wxString& name,
wxPathFormat format = wxPATH_NATIVE)
{ Assign(path, name, format); m_dontFollowLinks = false; }
// from a volume, directory name, file base name and extension
wxFileName(const wxString& volume,
const wxString& path,
const wxString& name,
const wxString& ext,
wxPathFormat format = wxPATH_NATIVE)
{ Assign(volume, path, name, ext, format); m_dontFollowLinks = false; }
// from a directory name, file base name and extension
wxFileName(const wxString& path,
const wxString& name,
const wxString& ext,
wxPathFormat format = wxPATH_NATIVE)
{ Assign(path, name, ext, format); m_dontFollowLinks = false; }
// the same for delayed initialization
void Assign(const wxFileName& filepath);
void Assign(const wxString& fullpath,
wxPathFormat format = wxPATH_NATIVE);
void Assign(const wxString& volume,
const wxString& path,
const wxString& name,
const wxString& ext,
bool hasExt,
wxPathFormat format = wxPATH_NATIVE);
void Assign(const wxString& volume,
const wxString& path,
const wxString& name,
const wxString& ext,
wxPathFormat format = wxPATH_NATIVE)
{ Assign(volume, path, name, ext, !ext.empty(), format); }
void Assign(const wxString& path,
const wxString& name,
wxPathFormat format = wxPATH_NATIVE);
void Assign(const wxString& path,
const wxString& name,
const wxString& ext,
wxPathFormat format = wxPATH_NATIVE);
void AssignDir(const wxString& dir, wxPathFormat format = wxPATH_NATIVE);
// assorted assignment operators
wxFileName& operator=(const wxFileName& filename)
{ if (this != &filename) Assign(filename); return *this; }
wxFileName& operator=(const wxString& filename)
{ Assign(filename); return *this; }
// reset all components to default, uninitialized state
void Clear();
// static pseudo constructors
static wxFileName FileName(const wxString& file,
wxPathFormat format = wxPATH_NATIVE);
static wxFileName DirName(const wxString& dir,
wxPathFormat format = wxPATH_NATIVE);
// file tests
// is the filename valid at all?
bool IsOk() const
{
// we're fine if we have the path or the name or if we're a root dir
return m_dirs.size() != 0 || !m_name.empty() || !m_relative ||
!m_ext.empty() || m_hasExt;
}
// does the file with this name exist?
bool FileExists() const;
static bool FileExists( const wxString &file );
// does the directory with this name exist?
bool DirExists() const;
static bool DirExists( const wxString &dir );
// does anything at all with this name (i.e. file, directory or some
// other file system object such as a device, socket, ...) exist?
bool Exists(int flags = wxFILE_EXISTS_ANY) const;
static bool Exists(const wxString& path, int flags = wxFILE_EXISTS_ANY);
// checks on most common flags for files/directories;
// more platform-specific features (like e.g. Unix permissions) are not
// available in wxFileName
bool IsDirWritable() const { return wxIsWritable(GetPath()); }
static bool IsDirWritable(const wxString &path) { return wxDirExists(path) && wxIsWritable(path); }
bool IsDirReadable() const { return wxIsReadable(GetPath()); }
static bool IsDirReadable(const wxString &path) { return wxDirExists(path) && wxIsReadable(path); }
// NOTE: IsDirExecutable() is not present because the meaning of "executable"
// directory is very platform-dependent and also not so useful
bool IsFileWritable() const { return wxIsWritable(GetFullPath()); }
static bool IsFileWritable(const wxString &path) { return wxFileExists(path) && wxIsWritable(path); }
bool IsFileReadable() const { return wxIsReadable(GetFullPath()); }
static bool IsFileReadable(const wxString &path) { return wxFileExists(path) && wxIsReadable(path); }
bool IsFileExecutable() const { return wxIsExecutable(GetFullPath()); }
static bool IsFileExecutable(const wxString &path) { return wxFileExists(path) && wxIsExecutable(path); }
// set the file permissions to a combination of wxPosixPermissions enum
// values
bool SetPermissions(int permissions);
// Returns the native path for a file URL
static wxFileName URLToFileName(const wxString& url);
// Returns the file URL for a native path
static wxString FileNameToURL(const wxFileName& filename);
// time functions
#if wxUSE_DATETIME
// set the file last access/mod and creation times
// (any of the pointers may be NULL)
bool SetTimes(const wxDateTime *dtAccess,
const wxDateTime *dtMod,
const wxDateTime *dtCreate) const;
// set the access and modification times to the current moment
bool Touch() const;
// return the last access, last modification and create times
// (any of the pointers may be NULL)
bool GetTimes(wxDateTime *dtAccess,
wxDateTime *dtMod,
wxDateTime *dtCreate) const;
// convenience wrapper: get just the last mod time of the file
wxDateTime GetModificationTime() const
{
wxDateTime dtMod;
(void)GetTimes(NULL, &dtMod, NULL);
return dtMod;
}
#endif // wxUSE_DATETIME
// various file/dir operations
// retrieve the value of the current working directory
void AssignCwd(const wxString& volume = wxEmptyString);
static wxString GetCwd(const wxString& volume = wxEmptyString);
// change the current working directory
bool SetCwd() const;
static bool SetCwd( const wxString &cwd );
// get the value of user home (Unix only mainly)
void AssignHomeDir();
static wxString GetHomeDir();
// get the system temporary directory
static wxString GetTempDir();
#if wxUSE_FILE || wxUSE_FFILE
// get a temp file name starting with the specified prefix
void AssignTempFileName(const wxString& prefix);
static wxString CreateTempFileName(const wxString& prefix);
#endif // wxUSE_FILE
#if wxUSE_FILE
// get a temp file name starting with the specified prefix and open the
// file passed to us using this name for writing (atomically if
// possible)
void AssignTempFileName(const wxString& prefix, wxFile *fileTemp);
static wxString CreateTempFileName(const wxString& prefix,
wxFile *fileTemp);
#endif // wxUSE_FILE
#if wxUSE_FFILE
// get a temp file name starting with the specified prefix and open the
// file passed to us using this name for writing (atomically if
// possible)
void AssignTempFileName(const wxString& prefix, wxFFile *fileTemp);
static wxString CreateTempFileName(const wxString& prefix,
wxFFile *fileTemp);
#endif // wxUSE_FFILE
// directory creation and removal.
bool Mkdir(int perm = wxS_DIR_DEFAULT, int flags = 0) const;
static bool Mkdir(const wxString &dir, int perm = wxS_DIR_DEFAULT,
int flags = 0);
bool Rmdir(int flags = 0) const;
static bool Rmdir(const wxString &dir, int flags = 0);
// operations on the path
// normalize the path using the specified normalizations, use
// MakeAbsolute() for a simpler form applying the standard ones
//
// this may be done using another (than current) value of cwd
bool Normalize(int flags,
const wxString& cwd = wxEmptyString,
wxPathFormat format = wxPATH_NATIVE);
// using wxPATH_NORM_ALL may give unexpected results, so avoid using
// this function and call Normalize(wxPATH_NORM_ENV_VARS | ...)
// explicitly if you really need environment variables expansion
wxDEPRECATED_MSG("specify the wanted flags explicitly to avoid surprises")
bool Normalize()
{ return Normalize(wxPATH_NORM_DEPR_OLD_DEFAULT); }
// get a path path relative to the given base directory, i.e. opposite
// of Normalize
//
// pass an empty string to get a path relative to the working directory
//
// returns true if the file name was modified, false if we failed to do
// anything with it (happens when the file is on a different volume,
// for example)
bool MakeRelativeTo(const wxString& pathBase = wxEmptyString,
wxPathFormat format = wxPATH_NATIVE);
// make the path absolute and resolve any "." and ".." in it
//
// this may be done using another (than current) value of cwd
bool MakeAbsolute(const wxString& cwd = wxEmptyString,
wxPathFormat format = wxPATH_NATIVE)
{ return Normalize(wxPATH_NORM_DOTS | wxPATH_NORM_ABSOLUTE |
wxPATH_NORM_TILDE, cwd, format); }
// Convenient helper for returning the absolute path corresponding to
// the given one.
wxString GetAbsolutePath(const wxString& cwd = wxEmptyString,
wxPathFormat format = wxPATH_NATIVE) const
{
wxFileName fn(*this);
fn.MakeAbsolute(cwd, format);
return fn.GetFullPath();
}
// If the path is a symbolic link (Unix-only), indicate that all
// filesystem operations on this path should be performed on the link
// itself and not on the file it points to, as is the case by default.
//
// No effect if this is not a symbolic link.
void DontFollowLink()
{
m_dontFollowLinks = true;
}
// If the path is a symbolic link (Unix-only), returns whether various
// file operations should act on the link itself, or on its target.
//
// This does not test if the path is really a symlink or not.
bool ShouldFollowLink() const
{
return !m_dontFollowLinks;
}
// Resolve a wxFileName object representing a link to its target
wxFileName ResolveLink();
#if defined(__WIN32__) && wxUSE_OLE
// if the path is a shortcut, return the target and optionally,
// the arguments
bool GetShortcutTarget(const wxString& shortcutPath,
wxString& targetFilename,
wxString* arguments = NULL) const;
#endif
// if the path contains the value of the environment variable named envname
// then this function replaces it with the string obtained from
// wxString::Format(replacementFmtString, value_of_envname_variable)
//
// Example:
// wxFileName fn("/usr/openwin/lib/someFile");
// fn.ReplaceEnvVariable("OPENWINHOME");
// // now fn.GetFullPath() == "$OPENWINHOME/lib/someFile"
bool ReplaceEnvVariable(const wxString& envname,
const wxString& replacementFmtString = wxS("$%s"),
wxPathFormat format = wxPATH_NATIVE);
// replaces, if present in the path, the home directory for the given user
// (see wxGetHomeDir) with a tilde
bool ReplaceHomeDir(wxPathFormat format = wxPATH_NATIVE);
// Comparison
// compares with the rules of the given platforms format
bool SameAs(const wxFileName& filepath,
wxPathFormat format = wxPATH_NATIVE) const;
// compare with another filename object
bool operator==(const wxFileName& filename) const
{ return SameAs(filename); }
bool operator!=(const wxFileName& filename) const
{ return !SameAs(filename); }
// compare with a filename string interpreted as a native file name
bool operator==(const wxString& filename) const
{ return SameAs(wxFileName(filename)); }
bool operator!=(const wxString& filename) const
{ return !SameAs(wxFileName(filename)); }
// are the file names of this type cases sensitive?
static bool IsCaseSensitive( wxPathFormat format = wxPATH_NATIVE );
// is this filename absolute?
bool IsAbsolute(wxPathFormat format = wxPATH_NATIVE) const;
// is this filename relative?
bool IsRelative(wxPathFormat format = wxPATH_NATIVE) const
{ return !IsAbsolute(format); }
// Returns the characters that aren't allowed in filenames
// on the specified platform.
static wxString GetForbiddenChars(wxPathFormat format = wxPATH_NATIVE);
// Information about path format
// get the string separating the volume from the path for this format,
// return an empty string if this format doesn't support the notion of
// volumes at all
static wxString GetVolumeSeparator(wxPathFormat format = wxPATH_NATIVE);
// get the string of path separators for this format
static wxString GetPathSeparators(wxPathFormat format = wxPATH_NATIVE);
// get the string of path terminators, i.e. characters which terminate the
// path
static wxString GetPathTerminators(wxPathFormat format = wxPATH_NATIVE);
// get the canonical path separator for this format
static wxUniChar GetPathSeparator(wxPathFormat format = wxPATH_NATIVE)
{ return GetPathSeparators(format)[0u]; }
// is the char a path separator for this format?
static bool IsPathSeparator(wxChar ch, wxPathFormat format = wxPATH_NATIVE);
// is this is a DOS path which beings with a windows unique volume name
// ('\\?\Volume{guid}\')?
static bool IsMSWUniqueVolumeNamePath(const wxString& path,
wxPathFormat format = wxPATH_NATIVE);
// Dir accessors
size_t GetDirCount() const { return m_dirs.size(); }
bool AppendDir(const wxString& dir);
void PrependDir(const wxString& dir);
bool InsertDir(size_t before, const wxString& dir);
void RemoveDir(size_t pos);
void RemoveLastDir() { RemoveDir(GetDirCount() - 1); }
// Other accessors
void SetExt( const wxString &ext ) { m_ext = ext; m_hasExt = !m_ext.empty(); }
void ClearExt() { m_ext.clear(); m_hasExt = false; }
void SetEmptyExt() { m_ext.clear(); m_hasExt = true; }
wxString GetExt() const { return m_ext; }
bool HasExt() const { return m_hasExt; }
void SetName( const wxString &name ) { m_name = name; }
wxString GetName() const { return m_name; }
bool HasName() const { return !m_name.empty(); }
void SetVolume( const wxString &volume ) { m_volume = volume; }
wxString GetVolume() const { return m_volume; }
bool HasVolume() const { return !m_volume.empty(); }
// full name is the file name + extension (but without the path)
void SetFullName(const wxString& fullname);
wxString GetFullName() const;
const wxArrayString& GetDirs() const { return m_dirs; }
// flags are combination of wxPATH_GET_XXX flags
wxString GetPath(int flags = wxPATH_GET_VOLUME,
wxPathFormat format = wxPATH_NATIVE) const;
// Replace current path with this one
void SetPath( const wxString &path, wxPathFormat format = wxPATH_NATIVE );
// Construct full path with name and ext
wxString GetFullPath( wxPathFormat format = wxPATH_NATIVE ) const;
// Return the short form of the path (returns identity on non-Windows platforms)
wxString GetShortPath() const;
// Return the long form of the path (returns identity on non-Windows platforms)
wxString GetLongPath() const;
// Is this a file or directory (not necessarily an existing one)
bool IsDir() const { return m_name.empty() && m_ext.empty(); }
// various helpers
// get the canonical path format for this platform
static wxPathFormat GetFormat( wxPathFormat format = wxPATH_NATIVE );
// split a fullpath into the volume, path, (base) name and extension
// (all of the pointers can be NULL)
static void SplitPath(const wxString& fullpath,
wxString *volume,
wxString *path,
wxString *name,
wxString *ext,
bool *hasExt = NULL,
wxPathFormat format = wxPATH_NATIVE);
static void SplitPath(const wxString& fullpath,
wxString *volume,
wxString *path,
wxString *name,
wxString *ext,
wxPathFormat format)
{
SplitPath(fullpath, volume, path, name, ext, NULL, format);
}
// compatibility version: volume is part of path
static void SplitPath(const wxString& fullpath,
wxString *path,
wxString *name,
wxString *ext,
wxPathFormat format = wxPATH_NATIVE);
// split a path into volume and pure path part
static void SplitVolume(const wxString& fullpathWithVolume,
wxString *volume,
wxString *path,
wxPathFormat format = wxPATH_NATIVE);
// strip the file extension: "foo.bar" => "foo" (but ".baz" => ".baz")
static wxString StripExtension(const wxString& fullpath);
#ifdef wxHAS_FILESYSTEM_VOLUMES
// return the string representing a file system volume, or drive
static wxString GetVolumeString(char drive, int flags = wxPATH_GET_SEPARATOR);
#endif // wxHAS_FILESYSTEM_VOLUMES
// File size
#if wxUSE_LONGLONG
// returns the size of the given filename
wxULongLong GetSize() const;
static wxULongLong GetSize(const wxString &file);
// returns the size in a human readable form
wxString
GetHumanReadableSize(const wxString& nullsize = wxGetTranslation(wxASCII_STR("Not available")),
int precision = 1,
wxSizeConvention conv = wxSIZE_CONV_TRADITIONAL) const;
static wxString
GetHumanReadableSize(const wxULongLong& sz,
const wxString& nullsize = wxGetTranslation(wxASCII_STR("Not available")),
int precision = 1,
wxSizeConvention conv = wxSIZE_CONV_TRADITIONAL);
#endif // wxUSE_LONGLONG
// deprecated methods, don't use any more
// --------------------------------------
wxString GetPath( bool withSep, wxPathFormat format = wxPATH_NATIVE ) const
{ return GetPath(withSep ? wxPATH_GET_SEPARATOR : 0, format); }
wxString GetPathWithSep(wxPathFormat format = wxPATH_NATIVE ) const
{ return GetPath(wxPATH_GET_VOLUME | wxPATH_GET_SEPARATOR, format); }
private:
// check whether this dir is valid for Append/Prepend/InsertDir()
static bool IsValidDirComponent(const wxString& dir);
// the drive/volume/device specification (always empty for Unix)
wxString m_volume;
// the path components of the file
wxArrayString m_dirs;
// the file name and extension (empty for directories)
wxString m_name,
m_ext;
// when m_dirs is empty it may mean either that we have no path at all or
// that our path is '/', i.e. the root directory
//
// we use m_relative to distinguish between these two cases, it will be
// true in the former and false in the latter
//
// NB: the path is not absolute just because m_relative is false, it still
// needs the drive (i.e. volume) in some formats (Windows)
bool m_relative;
// when m_ext is empty, it may be because we don't have any extension or
// because we have an empty extension
//
// the difference is important as file with name "foo" and without
// extension has full name "foo" while with empty extension it is "foo."
bool m_hasExt;
// by default, symlinks are dereferenced but this flag can be set with
// DontFollowLink() to change this and make different operations work on
// this file path itself instead of the target of the symlink
bool m_dontFollowLinks;
};
#endif // _WX_FILENAME_H_