include/wx/msw/iniconf.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        include/wx/msw/iniconf.h
   3 // Purpose:     INI-file based wxConfigBase implementation
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     27.07.98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef   _INICONF_H
  13 #define   _INICONF_H
  14
  15 // ----------------------------------------------------------------------------
  16 // wxIniConfig is a wxConfig implementation which uses MS Windows INI files to
  17 // store the data. Because INI files don't really support arbitrary nesting of
  18 // groups, we do the following:
  19 //  (1) in win.ini file we store all entries in the [vendor] section and
  20 //      the value group1/group2/key is mapped to the value group1_group2_key
  21 //      in this section, i.e. all path separators are replaced with underscore
  22 //  (2) in appname.ini file we map group1/group2/group3/key to the entry
  23 //      group2_group3_key in [group1]
  24 //
  25 // Of course, it might lead to indesirable results if '_' is also used in key
  26 // names (i.e. group/key is the same as group_key) and also GetPath() result
  27 // may be not what you would expect it to be.
  28 //
  29 // Another limitation: the keys and section names are never case-sensitive
  30 // which might differ from wxFileConfig it it was compiled with
  31 // wxCONFIG_CASE_SENSITIVE option.
  32 // ----------------------------------------------------------------------------
  33
  34 // for this class, "local" file is the file appname.ini and the global file
  35 // is the [vendor] subsection of win.ini (default for "vendor" is to be the
  36 // same as appname). The file name (strAppName parameter) may, in fact,
  37 // contain the full path to the file. If it doesn't, the file is searched for
  38 // in the Windows directory.
  39 class wxIniConfig : public wxConfigBase
  40 {
  41 public:
  42   // ctor & dtor
  43     // if strAppName doesn't contain the extension and is not an absolute path,
  44     // ".ini" is appended to it. if strVendor is empty, it's taken to be the
  45     // same as strAppName.
  46   wxIniConfig(const wxString& strAppName = wxEmptyString, const wxString& strVendor = wxEmptyString,
  47     const wxString& localFilename = wxEmptyString, const wxString& globalFilename = wxEmptyString, long style = wxCONFIG_USE_LOCAL_FILE);
  48   virtual ~wxIniConfig();
  49
  50   // implement inherited pure virtual functions
  51   virtual void SetPath(const wxString& strPath);
  52   virtual const wxString& GetPath() const;
  53
  54   virtual bool GetFirstGroup(wxString& str, long& lIndex) const;
  55   virtual bool GetNextGroup (wxString& str, long& lIndex) const;
  56   virtual bool GetFirstEntry(wxString& str, long& lIndex) const;
  57   virtual bool GetNextEntry (wxString& str, long& lIndex) const;
  58
  59   virtual size_t GetNumberOfEntries(bool bRecursive = FALSE) const;
  60   virtual size_t GetNumberOfGroups(bool bRecursive = FALSE) const;
  61
  62   virtual bool HasGroup(const wxString& strName) const;
  63   virtual bool HasEntry(const wxString& strName) const;
  64
  65   // return TRUE if the current group is empty
  66   bool IsEmpty() const;
  67
  68   // read/write
  69   bool Read(const wxString& key, wxString *pStr) const;
  70   bool Read(const wxString& key, wxString *pStr, const wxString& szDefault) const;
  71   bool Read(const wxString& key, long *plResult) const;
  72
  73   // The following are necessary to satisfy the compiler
  74   wxString Read(const wxString& key, const wxString& defVal) const
  75   { return wxConfigBase::Read(key, defVal); }
  76   bool Read(const wxString& key, long *pl, long defVal) const
  77   { return wxConfigBase::Read(key, pl, defVal); }
  78   long Read(const wxString& key, long defVal) const
  79   { return wxConfigBase::Read(key, defVal); }
  80   bool Read(const wxString& key, double* val) const
  81   { return wxConfigBase::Read(key, val); }
  82   bool Read(const wxString& key, double* val, double defVal) const
  83   { return wxConfigBase::Read(key, val, defVal); }
  84
  85   bool Write(const wxString& key, const wxString& szValue);
  86   bool Write(const wxString& key, long lValue);
  87
  88   virtual bool Flush(bool bCurrentOnly = FALSE);
  89
  90   virtual bool DeleteEntry(const char *szKey, bool bGroupIfEmptyAlso);
  91   virtual bool DeleteGroup(const char *szKey);
  92   virtual bool DeleteAll();
  93
  94 private:
  95   // helpers
  96   wxString GetPrivateKeyName(const wxString& szKey) const;
  97   wxString GetKeyName(const wxString& szKey) const;
  98
  99   wxString m_strLocalFilename;  // name of the private INI file
 100   wxString m_strGroup,    // current group in appname.ini file
 101            m_strPath;     // the rest of the path (no trailing '_'!)
 102 };
 103
 104 #endif  //_INICONF_H