text: /////////////////////////////////////////////////////////////////////////////
  // Name:        stdpaths.h
  // Purpose:     interface of wxStandardPaths
  // Author:      wxWidgets team
  // Licence:     wxWindows licence
  /////////////////////////////////////////////////////////////////////////////
  
  /**
      @class wxStandardPaths
  
      wxStandardPaths returns the standard locations in the file system and should be
      used by applications to find their data files in a portable way.
  
      Note that you must not create objects of class wxStandardPaths directly,
      but use the global standard paths object returned by wxStandardPaths::Get()
      (which can be of a type derived from wxStandardPaths and not of exactly
      this type) and call the methods you need on it. The object returned by
      Get() may be customized by overriding wxAppTraits::GetStandardPaths()
      methods.
  
      In the description of the methods below, the example return values are given
      for the Unix, Windows and OS X systems, however please note that these are
      just the examples and the actual values may differ. For example, under Windows:
      the system administrator may change the standard directories locations, e.g.
      the Windows directory may be named @c "W:\Win2003" instead of
      the default @c "C:\Windows".
  
      Notice that in the examples below the string @c appinfo may be either just
      the application name (as returned by wxApp::GetAppName()) or a combination
      of the vendor name (wxApp::GetVendorName()) and the application name, with
      a path separator between them. By default, only the application name is
      used, use UseAppInfo() to change this.
  
      The other placeholders should be self-explanatory: the string @c username
      should be replaced with the value the name of the currently logged in user.
      and @c prefix is only used under Unix and is @c /usr/local by default but
      may be changed using wxStandardPaths::SetInstallPrefix().
  
      The directories returned by the methods of this class may or may not exist.
      If they don't exist, it's up to the caller to create them, wxStandardPaths doesn't
      do it.
  
      Finally note that these functions only work with standardly packaged
      applications. I.e. under Unix you should follow the standard installation
      conventions and under Mac you should create your application bundle according
      to the Apple guidelines. Again, this class doesn't help you to do it.
  
      This class is MT-safe: its methods may be called concurrently from different
      threads without additional locking.
  
      @library{wxbase}
      @category{file}
  
      @see wxFileConfig
  */
  class wxStandardPaths
  {
  public:
      /// Possible values for category parameter of GetLocalizedResourcesDir().
      enum ResourceCat
      {
          /// No special category, this is the default.
          ResourceCat_None,
  
          /// Message catalog resources category.
          ResourceCat_Messages
      };
  
      /// Possible values for userDir parameter of GetUserDir().
      enum Dir
      {
          /**
              Directory for caching files.
  
              Example return values:
              - Unix: @c ~/.cache
              - Windows: @c "C:\Users\username\AppData\Local"
              - Mac: @c ~/Library/Caches
          */
          Dir_Cache,
  
          /**
              Directory containing user documents.
  
              Example return values:
              - Unix/Mac: @c ~/Documents
              - Windows: @c "C:\Users\username\Documents"
          */
          Dir_Documents,
  
          /**
              Directory containing files on the users desktop.
  
              Example return values:
              - Unix/Mac: @c ~/Desktop
              - Windows: @c "C:\Users\username\Desktop"
          */
          Dir_Desktop,
  
          /**
              Directory for downloaded files
  
              Example return values:
              - Unix/Mac: @c ~/Downloads
              - Windows: @c "C:\Users\username\Downloads" (Only available on Vista and newer)
          */
          Dir_Downloads,
  
          /**
              Directory containing music files.
  
              Example return values:
              - Unix/Mac: @c ~/Music
              - Windows: @c "C:\Users\username\Music"
          */
          Dir_Music,
  
          /**
              Directory containing picture files.
  
              Example return values:
              - Unix/Mac: @c ~/Pictures
              - Windows: @c "C:\Users\username\Pictures"
          */
          Dir_Pictures,
  
          /**
              Directory containing video files.
  
              Example return values:
              - Unix: @c ~/Videos
              - Windows: @c "C:\Users\username\Videos"
              - Mac: @c ~/Movies
          */
          Dir_Videos
      };
  
      /**
          Possible values for SetFileLayout() argument.
  
          The elements of this enum correspond to the different file layout
          standards under Unix systems.
  
          @since 3.1.1
       */
      enum FileLayout
      {
          /**
              Use the classic file layout.
  
              User configuration and data files are located directly in the home
              directory.
  
              This is the default behaviour for compatibility reasons.
          */
          FileLayout_Classic,
  
          /**
              Use a XDG styled file layout.
  
              File layout follows the XDG Base Directory Specification (see
              https://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html).
  
              This is the recommended layout for new applications.
          */
          FileLayout_XDG
      };
  
      /**
          Possible values for MakeConfigFileName() naming convention argument.
  
          The values in this enum are only used under Unix and only when using
          the classic Unix convention for file layout, in XDG mode, XDG naming
          convention is used unconditionally.
  
          @since 3.1.1
       */
      enum ConfigFileConv
      {
          /**
              Use the class Unix dot-file convention.
  
              Prepend the dot to the file base name.
  
              This value is ignored when in XDG mode, where MakeConfigFileName()
              always behaves as if ConfigFileConv_Ext was specified.
          */
          ConfigFileConv_Dot,
  
          /**
              Use @c .conf extension for the file names.
  
              This convention is always used in XDG mode.
           */
          ConfigFileConv_Ext
      };
  
      /**
          MSW-specific function undoing the effect of IgnoreAppSubDir() calls.
  
          After a call to this function the program directory will be exactly the
          directory containing the main application binary, i.e. it undoes the
          effect of any previous IgnoreAppSubDir() calls including the ones done
          indirectly by IgnoreAppBuildSubDirs() called from the class
          constructor.
  
          @since 2.9.1
       */
      void DontIgnoreAppSubDir();
  
      /**
          Returns reference to the unique global standard paths object.
      */
      static wxStandardPaths& Get();
  
      /**
          Return the directory for the document files used by this application.
  
          If the application-specific directory doesn't exist, this function
          returns GetDocumentsDir().
  
          Example return values:
          - Unix: @c ~/appinfo
          - Windows: @c "C:\Users\username\Documents\appinfo" or
                     @c "C:\Documents and Settings\username\My Documents\appinfo"
          - Mac: @c ~/Documents/appinfo
  
          @since 2.9.0
       */
      virtual wxString GetAppDocumentsDir() const;
  
      /**
          Return the directory containing the system config files.
          Example return values:
          - Unix: @c /etc
          - Windows: @c "C:\ProgramData\appinfo" or
                     @c "C:\Documents and Settings\All Users\Application Data\appinfo"
          - Mac: @c /Library/Preferences
  
          @note Under Windows this includes @c appinfo which makes it inconsistent
          with other ports.
  
          @see wxFileConfig
      */
      virtual wxString GetConfigDir() const;
  
      /**
          Return the location of the applications global, i.e.\ not user-specific,
          data files.
  
          Example return values:
          - Unix: @c prefix/share/appinfo
          - Windows: the directory where the executable file is located
          - Mac: @c appinfo.app/Contents/SharedSupport bundle subdirectory
  
          Under Unix (only) it is possible to override the default value returned
          from this function by setting the value of @c WX_APPNAME_DATA_DIR
          environment variable to the directory to use (where @c APPNAME is the
          upper-cased value of wxApp::GetAppName()). This is useful in order to
          be able to run applications using this function without installing them
          as you can simply set this environment variable to the source directory
          location to allow the application to find its files there.
  
          @see GetLocalDataDir()
      */
      virtual wxString GetDataDir() const;
  
      /**
          Same as calling GetUserDir() with Dir_Documents parameter.
  
          @since 2.7.0
  
          @see GetAppDocumentsDir(), GetUserDir()
      */
      virtual wxString GetDocumentsDir() const;
  
      /**
          Return the directory and the filename for the current executable.
          Example return values:
          - Unix: @c /usr/local/bin/exename
          - Windows: @c "C:\Programs\AppFolder\exename.exe"
          - Mac: @c /Applications/exename.app/Contents/MacOS/exename
      */
      virtual wxString GetExecutablePath() const;
  
      /**
          Return the program installation prefix, e.g.\ @c /usr, @c /opt or @c /home/zeitlin.
  
          If the prefix had been previously by SetInstallPrefix(), returns that
          value, otherwise tries to determine it automatically (Linux only right now)
          and finally returns the default @c /usr/local value if it failed.
  
          @note This function is only available under Unix platforms (but not limited
          to wxGTK mentioned below).
  
          @onlyfor{wxgtk}
      */
      wxString GetInstallPrefix() const;
  
      /**
          Return the location for application data files which are host-specific and
          can't, or shouldn't, be shared with the other machines.
  
          This is the same as GetDataDir() except under Unix where it returns @c /etc/appinfo.
      */
      virtual wxString GetLocalDataDir() const;
  
      /**
          Return the localized resources directory containing the resource files of the
          specified category for the given language.
  
          In general this is just the same as @a lang subdirectory of GetResourcesDir()
          (or @c lang.lproj under OS X) but is something quite different for
          message catalog category under Unix where it returns the standard
          @c prefix/share/locale/lang/LC_MESSAGES directory.
  
          @since 2.7.0
      */
      virtual wxString
      GetLocalizedResourcesDir(const wxString& lang,
                               ResourceCat category = ResourceCat_None) const;
  
      /**
          Return the directory where the loadable modules (plugins) live.
          Example return values:
          - Unix: @c prefix/lib/appinfo
          - Windows: the directory of the executable file
          - Mac: @c appinfo.app/Contents/PlugIns bundle subdirectory
  
          @see wxDynamicLibrary
      */
      virtual wxString GetPluginsDir() const;
  
      /**
          Return the directory where the application resource files are located.
  
          The resources are the auxiliary data files needed for the application to run
          and include, for example, image and sound files it might use.
  
          This function is the same as GetDataDir() for all platforms except OS X.
          Example return values:
          - Unix: @c prefix/share/appinfo
          - Windows: the directory where the executable file is located
          - Mac: @c appinfo.app/Contents/Resources bundle subdirectory
  
          @since 2.7.0
  
          @see GetLocalizedResourcesDir()
      */
      virtual wxString GetResourcesDir() const;
  
      /**
          Return the directory for storing temporary files, for the current user. Same as
          wxFileName::GetTempDir().
          To create unique temporary files, it is best to use wxFileName::CreateTempFileName()
          for correct behaviour when multiple processes are attempting to create temporary files.
  
          @since 2.7.2
      */
      virtual wxString GetTempDir() const;
  
      /**
          Return the directory for the user config files.
  
          This directory is:
          - Unix: @c ~ (the home directory) or @c XDG_CONFIG_HOME depending on
              GetFileLayout() return value
          - Windows: @c "C:\Users\username\AppData\Roaming" or
                     @c "C:\Documents and Settings\username\Application Data"
          - Mac: @c ~/Library/Preferences
  
          Only use this method if you have a single configuration file to put in this
          directory, otherwise GetUserDataDir() is more appropriate as the latter
          adds @c appinfo to the path, unlike this function.
      */
      virtual wxString GetUserConfigDir() const;
  
      /**
          Return the directory for the user-dependent application data files:
          - Unix: @c ~/.appinfo
          - Windows: @c "C:\Users\username\AppData\Roaming\appinfo" or
                     @c "C:\Documents and Settings\username\Application Data\appinfo"
          - Mac: @c "~/Library/Application Support/appinfo"
      */
      virtual wxString GetUserDataDir() const;
  
      /**
          Return the path of the specified user data directory.
  
          If the value could not be determined the users home directory is returned.
  
          @note On Unix this (newer) method always respects the XDG base
          directory specification, even if SetFileLayout() with @c FileLayout_XDG
          hadn't been called.
  
          @since 3.1.0
      */
      virtual wxString GetUserDir(Dir userDir) const;
  
      /**
          Return the directory for user data files which shouldn't be shared with
          the other machines.
  
          This is the same as GetUserDataDir() for all platforms except Windows where it returns
          @c "C:\Users\username\AppData\Local\appinfo" or
          @c "C:\Documents and Settings\username\Local Settings\Application Data\appinfo"
      */
      virtual wxString GetUserLocalDataDir() const;
  
      /**
          MSW-specific function to customize application directory detection.
  
          This class supposes that data, plugins &c files are located under the
          program directory which is the directory containing the application
          binary itself. But sometimes this binary may be in a subdirectory of
          the main program directory, e.g. this happens in at least the following
          common cases:
           - The program is in "bin" subdirectory of the installation directory.
           - The program is in "debug" subdirectory of the directory containing
             sources and data files during development
  
          By calling this function you instruct the class to remove the last
          component of the path if it matches its argument. Notice that it may be
          called more than once, e.g. you can call both IgnoreAppSubDir("bin") and
          IgnoreAppSubDir("debug") to take care of both production and development
          cases above but that each call will only remove the last path component.
          Finally note that the argument can contain wild cards so you can also
          call IgnoreAppSubDir("vc*msw*") to ignore all build directories at once
          when using wxWidgets-inspired output directories names.
  
          @since 2.9.1
  
          @see IgnoreAppBuildSubDirs()
  
          @param subdirPattern
              The subdirectory containing the application binary which should be
              ignored when determining the top application directory. The pattern
              is case-insensitive and may contain wild card characters @c '?' and
              @c '*'.
       */
      void IgnoreAppSubDir(const wxString& subdirPattern);
  
      /**
          MSW-specific function to ignore all common build directories.
  
          This function calls IgnoreAppSubDir() with all common values for build
          directory, e.g. @c "debug" and @c "release".
  
          It is called by the class constructor and so the build directories are
          always ignored by default. You may use DontIgnoreAppSubDir() to avoid
          ignoring them if this is inappropriate for your application.
  
          @since 2.9.1
       */
      void IgnoreAppBuildSubDirs();
  
      /**
          Returns location of Windows shell special folder.
  
          This function is, by definition, MSW-specific. It can be used to access
          pre-defined shell directories not covered by the existing methods of
          this class, e.g.:
          @code
          #ifdef __WXMSW__
              // get the location of files waiting to be burned on a CD
              wxString cdburnArea =
                  wxStandardPaths::MSWGetShellDir(CSIDL_CDBURN_AREA);
          #endif // __WXMSW__
          @endcode
  
          @param csidl
  
          @since 2.9.1
       */
      static wxString MSWGetShellDir(int csidl);
  
      /**
          Lets wxStandardPaths know about the real program installation prefix on a Unix
          system. By default, the value returned by GetInstallPrefix() is used.
  
          Although under Linux systems the program prefix may usually be determined
          automatically, portable programs should call this function. Usually the prefix
          is set during program configuration if using GNU autotools and so it is enough
          to pass its value defined in @c config.h to this function.
  
          @note This function is only available under Unix platforms (but not limited
          to wxGTK mentioned below).
  
          @onlyfor{wxgtk}
      */
      void SetInstallPrefix(const wxString& prefix);
  
      /**
          Controls what application information is used when constructing paths that
          should be unique to this program, such as the application data directory, the
          plugins directory on Unix, etc.
  
          Valid values for @a info are:
              - @c AppInfo_None: don't use neither application nor vendor name in
              the paths.
              - @c AppInfo_AppName: use the application name in the paths.
              - @c AppInfo_VendorName: use the vendor name in the paths, usually
              used combined with AppInfo_AppName, i.e. as @code AppInfo_AppName |
              AppInfo_VendorName @endcode
  
          By default, only the application name is used.
  
          @since 2.9.0
      */
      void UseAppInfo(int info);
  
      /**
          Sets the current file layout.
  
          The default layout is @c FileLayout_Classic for compatibility, however
          newer applications are encouraged to set it to @c FileLayout_XDG on
          program startup.
  
          @since 3.1.1
      */
      void SetFileLayout(FileLayout layout);
  
      /**
          Returns the current file layout.
  
          @see SetFileLayout()
  
          @since 3.1.1
      */
      FileLayout GetFileLayout() const;
  
      /**
          Return the file name which would be used by wxFileConfig if it were
          constructed with @a basename.
  
          @a conv is used to construct the name of the file under Unix and only
          matters when using the class file layout, i.e. if SetFileLayout() had
          @e not been called with @c FileLayout_XDG argument. In this case, this
          argument is used to determine whether to use an extension or a leading
          dot. When following XDG specification, the function always appends the
          extension, regardless of @a conv value. Finally, this argument is not
          used at all under non-Unix platforms.
  
          @since 3.1.1
      */
      virtual wxString
      MakeConfigFileName(const wxString& basename,
                         ConfigFileConv conv = ConfigFileConv_Ext) const;
  
  protected:
      /**
          Protected default constructor.
  
          This constructor is protected in order to prevent creation of objects
          of this class as Get() should be used instead to access the unique
          global wxStandardPaths object of the correct type.
       */
      wxStandardPaths();
  };
  
  