include/wx/msw/registry.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/registry.h
   3 // Purpose:     Registry classes and functions
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     03.04.198
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef   _REGISTRY_H
  13 #define   _REGISTRY_H
  14
  15 // ----------------------------------------------------------------------------
  16 // mutable hack (see also registry.cpp)
  17 // ----------------------------------------------------------------------------
  18 #if   USE_MUTABLE
  19   #define MUTABLE mutable
  20 #else
  21   #define MUTABLE
  22 #endif
  23
  24 // ----------------------------------------------------------------------------
  25 // forward decl for handle type
  26 // ----------------------------------------------------------------------------
  27 #ifndef   HKEY_DEFINED
  28   #define HKEY_DEFINED
  29   #define HKEY unsigned long
  30 #endif
  31
  32 // ----------------------------------------------------------------------------
  33 // class wxRegKey encapsulates window HKEY handle
  34 // ----------------------------------------------------------------------------
  35 class WXDLLEXPORT wxRegKey
  36 {
  37 public:
  38   // NB: do _not_ change the values of elements in these enumerations!
  39
  40   // registry value types (with comments from winnt.h)
  41   enum ValueType
  42   {
  43     Type_None,                       // No value type
  44     Type_String,                     // Unicode nul terminated string
  45 #ifdef  __WIN32__
  46     Type_Expand_String,              // Unicode nul terminated string
  47                                      // (with environment variable references)
  48     Type_Binary,                     // Free form binary
  49     Type_Dword,                      // 32-bit number
  50     Type_Dword_little_endian,        // 32-bit number (same as Type_DWORD)
  51     Type_Dword_big_endian,           // 32-bit number
  52     Type_Link,                       // Symbolic Link (unicode)
  53     Type_Multi_String,               // Multiple Unicode strings
  54     Type_Resource_list,              // Resource list in the resource map
  55     Type_Full_resource_descriptor,   // Resource list in the hardware description
  56     Type_Resource_requirements_list, // ???
  57 #endif  //WIN32
  58   };
  59
  60   // predefined registry keys
  61   enum StdKey
  62   {
  63     HKCR,     // classes root
  64 #ifdef  __WIN32__
  65     HKCU,     // current user
  66     HKLM,     // local machine
  67     HKUSR,    // users
  68     HKPD,     // performance data (@@ NT only?)
  69 #if    WINVER >= 0x0400
  70     HKCC,     // current config
  71     HKDD,     // dynamic data
  72 #endif  // Winver
  73 #endif  // Win32/16
  74   };
  75
  76   // information about standard (predefined) registry keys
  77     // number of standard keys
  78   static const size_t nStdKeys;
  79     // get the name of a standard key
  80   static const char *GetStdKeyName(uint key);
  81     // get the short name of a standard key
  82   static const char *GetStdKeyShortName(uint key);
  83     // get StdKey from root HKEY
  84   static StdKey GetStdKeyFromHkey(HKEY hkey);
  85
  86   // extacts the std key prefix from the string (return value) and
  87   // leaves only the part after it (i.e. modifies the string passed!)
  88   static StdKey ExtractKeyName(wxString& str);
  89
  90   // ctors
  91     // root key is set to HKCR (the only root key under Win16)
  92   wxRegKey();
  93     // strKey is the full name of the key (i.e. starting with HKEY_xxx...)
  94   wxRegKey(const wxString& strKey);
  95     // strKey is the name of key under (standard key) keyParent
  96   wxRegKey(StdKey keyParent, const wxString& strKey);
  97     // strKey is the name of key under (previously created) keyParent
  98   wxRegKey(const wxRegKey& keyParent, const wxString& strKey);
  99     //
 100  ~wxRegKey();
 101
 102   // change key (closes the previously opened key if any)
 103     // the name is absolute, i.e. should start with HKEY_xxx
 104   void  SetName(const wxString& strKey);
 105     // the name is relative to the parent key
 106   void  SetName(StdKey keyParent, const wxString& strKey);
 107     // the name is relative to the parent key
 108   void  SetName(const wxRegKey& keyParent, const wxString& strKey);
 109     // hKey should be opened and will be closed in wxRegKey dtor
 110   void  SetHkey(HKEY hKey);
 111
 112   // get infomation about the key
 113     // get the (full) key name. Abbreviate std root keys if bShortPrefix.
 114   wxString GetName(bool bShortPrefix = true) const;
 115     // return true if the key exists
 116   bool  Exists()   const;
 117     // return true if the key is opened
 118   bool  IsOpened() const { return m_hKey != 0;        }
 119     // for "if ( !key ) wxLogError(...)" kind of expressions
 120   operator bool()  const { return m_dwLastError == 0; }
 121
 122   // operations on the key itself
 123     // explicitly open the key (will be automatically done by all functions
 124     // which need the key to be opened if the key is not opened yet)
 125   bool  Open();
 126     // create the key: will fail if the key already exists and bOkIfExists
 127   bool  Create(bool bOkIfExists = true);
 128     // close the key (will be automatically done in dtor)
 129   bool  Close();
 130
 131   // deleting keys/values
 132     // deletes this key and all of it's subkeys/values
 133   bool  DeleteSelf();
 134     // deletes the subkey with all of it's subkeys/values recursively
 135   bool  DeleteKey(const char *szKey);
 136     // deletes the named value (may be NULL to remove the default value)
 137   bool  DeleteValue(const char *szValue);
 138
 139   // access to values and subkeys
 140     // get value type
 141   ValueType GetValueType(const char *szValue);
 142
 143     // assignment operators set the default value of the key
 144   wxRegKey& operator=(const wxString& strValue)
 145     { SetValue(NULL, strValue); return *this; }
 146   wxRegKey& operator=(long lValue)
 147     { SetValue(NULL, lValue); return *this; }
 148
 149     // conversion operators query the default value of the key
 150   operator wxString() const;
 151
 152     // set the string value
 153   bool  SetValue(const char *szValue, const wxString& strValue);
 154     // return the string value
 155   bool  QueryValue(const char *szValue, wxString& strValue) const;
 156
 157 #ifdef  __WIN32__
 158     // set the numeric value
 159   bool  SetValue(const char *szValue, long lValue);
 160     // return the numeric value
 161   bool  QueryValue(const char *szValue, long *plValue) const;
 162 #endif  //Win32
 163
 164   // query existence of a key/value
 165     // return true if value exists
 166   bool  HasValue(const char *szKey) const;
 167     // return true if given subkey exists
 168   bool  HasSubKey(const char *szKey) const;
 169     // return true if any subkeys exist
 170   bool  HasSubkeys() const;
 171
 172   // enumerate values and subkeys
 173   bool  GetFirstValue(wxString& strValueName, long& lIndex);
 174   bool  GetNextValue (wxString& strValueName, long& lIndex) const;
 175
 176   bool  GetFirstKey  (wxString& strKeyName  , long& lIndex);
 177   bool  GetNextKey   (wxString& strKeyName  , long& lIndex) const;
 178
 179 private:
 180   // no copy ctor/assignment operator
 181   wxRegKey(const wxRegKey& key);            // not implemented
 182   wxRegKey& operator=(const wxRegKey& key); // not implemented
 183
 184   HKEY        m_hKey,           // our handle
 185               m_hRootKey;       // handle of the top key (i.e. StdKey)
 186   wxString    m_strKey;         // key name (relative to m_hRootKey)
 187
 188   MUTABLE long m_dwLastError;   // last error (0 if none)
 189 };
 190
 191 #endif  //_REGISTRY_H
 192