filename.h

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/////////////////////////////////////////////////////////////////////////////
// Name:        wx/filename.h
// Purpose:     wxFileName - encapsulates a file path
// Author:      Robert Roebling, Vadim Zeitlin
// Modified by:
// Created:     28.12.00
// RCS-ID:      $Id: filename.h,v 1.63.2.1 2005/09/25 20:46:18 MW Exp $
// Copyright:   (c) 2000 Robert Roebling
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifndef   _WX_FILENAME_H_
#define   _WX_FILENAME_H_

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
    #pragma interface "filename.h"
#endif

/*
    TODO:

    1. support for drives under Windows
    2. more file operations:
        a) chmod()
        b) [acm]time() - get and set
        c) file size
        d) file permissions with readable accessors for most common bits
           such as IsReadable() &c
        e) rename()?
    3. SameFileAs() function to compare inodes under Unix
 */

#include "wx/arrstr.h"
#include "wx/filefn.h"
#include "wx/datetime.h"

#if wxUSE_FILE
class WXDLLIMPEXP_BASE wxFile;
#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
};

// 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 . and prepend cwd
    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
    wxPATH_NORM_SHORTCUT = 0x0040,  // resolve the shortcut, if it is a shortcut
    wxPATH_NORM_ALL      = 0x00ff & ~wxPATH_NORM_CASE
};

// what exactly should GetPath() return?
enum
{
    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
};

// ----------------------------------------------------------------------------
// 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 contructed (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 ); }

        // from a directory name and a file name
    wxFileName(const wxString& path,
               const wxString& name,
               wxPathFormat format = wxPATH_NATIVE)
        { Assign(path, name, format); }

        // 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); }

        // 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); }

        // 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)
        { 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 exists?
    bool FileExists() const;
    static bool FileExists( const wxString &file );

        // does the directory with this name exists?
    bool DirExists() const;
    static bool DirExists( const wxString &dir );

        // VZ: also need: IsDirWritable(), IsFileExecutable() &c (TODO)

    // 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);

        // set the access and modification times to the current moment
    bool Touch();

        // 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

#ifdef __WXMAC__
    bool MacSetTypeAndCreator( wxUint32 type , wxUint32 creator ) ;
    bool MacGetTypeAndCreator( wxUint32 *type , wxUint32 *creator ) ;
    // gets the 'common' type and creator for a certain extension
    static bool MacFindDefaultTypeAndCreator( const wxString& ext , wxUint32 *type , wxUint32 *creator ) ;
    // registers application defined extensions and their default type and creator
    static void MacRegisterDefaultTypeAndCreator( const wxString& ext , wxUint32 type , wxUint32 creator ) ;
    // looks up the appropriate type and creator from the registration and then sets
    bool MacSetDefaultTypeAndCreator() ;
#endif

    // 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();
    static bool SetCwd( const wxString &cwd );