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 licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef   _REGISTRY_H
  13 #define   _REGISTRY_H
  14
  15 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  16 #pragma interface "registry.h"
  17 #endif
  18
  19 // ----------------------------------------------------------------------------
  20 // types used in this module
  21 // ----------------------------------------------------------------------------
  22
  23 /*
  24 #ifndef   HKEY_DEFINED
  25   #define HKEY_DEFINED
  26   #define HKEY unsigned long
  27 #endif
  28 */
  29
  30 typedef unsigned long ulong;
  31
  32 // ----------------------------------------------------------------------------
  33 // class wxRegKey encapsulates window HKEY handle
  34 // ----------------------------------------------------------------------------
  35 class WXDLLIMPEXP_BASE 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
  51         = Type_Dword,                // (same as Type_DWORD)
  52     Type_Dword_big_endian,           // 32-bit number
  53     Type_Link,                       // Symbolic Link (unicode)
  54     Type_Multi_String,               // Multiple Unicode strings
  55     Type_Resource_list,              // Resource list in the resource map
  56     Type_Full_resource_descriptor,   // Resource list in the hardware description
  57     Type_Resource_requirements_list  // ???
  58 #endif  //WIN32
  59   };
  60
  61   // predefined registry keys
  62   enum StdKey
  63   {
  64     HKCR        // classes root
  65 #ifdef  __WIN32__
  66     ,
  67     HKCU,       // current user
  68     HKLM,       // local machine
  69     HKUSR,      // users
  70     HKPD        // performance data (WinNT/2K only)
  71 #if WINVER >= 0x0400
  72     ,
  73     HKCC,       // current config (starting from Win95/NT 4.0)
  74     HKDD        // dynamic data (Win95/98 only)
  75 #endif  // Winver
  76 #endif  // Win32/16
  77   };
  78
  79   // access mode for the key
  80   enum AccessMode
  81   {
  82       Read,     // read-only
  83       Write     // read and write
  84   };
  85
  86   // information about standard (predefined) registry keys
  87     // number of standard keys
  88   static const size_t nStdKeys;
  89     // get the name of a standard key
  90   static const wxChar *GetStdKeyName(size_t key);
  91     // get the short name of a standard key
  92   static const wxChar *GetStdKeyShortName(size_t key);
  93     // get StdKey from root HKEY
  94   static StdKey GetStdKeyFromHkey(WXHKEY hkey);
  95
  96   // extacts the std key prefix from the string (return value) and
  97   // leaves only the part after it (i.e. modifies the string passed!)
  98   static StdKey ExtractKeyName(wxString& str);
  99
 100   // ctors
 101     // root key is set to HKCR (the only root key under Win16)
 102   wxRegKey();
 103     // strKey is the full name of the key (i.e. starting with HKEY_xxx...)
 104   wxRegKey(const wxString& strKey);
 105     // strKey is the name of key under (standard key) keyParent
 106   wxRegKey(StdKey keyParent, const wxString& strKey);
 107     // strKey is the name of key under (previously created) keyParent
 108   wxRegKey(const wxRegKey& keyParent, const wxString& strKey);
 109     // dtor closes the key
 110  ~wxRegKey();
 111
 112   // change key (closes the previously opened key if any)
 113     // the name is absolute, i.e. should start with HKEY_xxx
 114   void  SetName(const wxString& strKey);
 115     // the name is relative to the parent key
 116   void  SetName(StdKey keyParent, const wxString& strKey);
 117     // the name is relative to the parent key
 118   void  SetName(const wxRegKey& keyParent, const wxString& strKey);
 119     // hKey should be opened and will be closed in wxRegKey dtor
 120   void  SetHkey(WXHKEY hKey);
 121
 122   // get infomation about the key
 123     // get the (full) key name. Abbreviate std root keys if bShortPrefix.
 124   wxString GetName(bool bShortPrefix = TRUE) const;
 125     // return true if the key exists
 126   bool  Exists() const;
 127     // get the info about key (any number of these pointers may be NULL)
 128   bool  GetKeyInfo(size_t *pnSubKeys,      // number of subkeys
 129                    size_t *pnMaxKeyLen,    // max len of subkey name
 130                    size_t *pnValues,       // number of values
 131                    size_t *pnMaxValueLen) const;
 132     // return true if the key is opened
 133   bool  IsOpened() const { return m_hKey != 0; }
 134     // for "if ( !key ) wxLogError(...)" kind of expressions
 135   operator bool()  const { return m_dwLastError == 0; }
 136
 137   // operations on the key itself
 138     // explicitly open the key (will be automatically done by all functions
 139     // which need the key to be opened if the key is not opened yet)
 140   bool  Open(AccessMode mode = Write);
 141     // create the key: will fail if the key already exists and !bOkIfExists
 142   bool  Create(bool bOkIfExists = TRUE);
 143     // rename a value from old name to new one
 144   bool  RenameValue(const wxChar *szValueOld, const wxChar *szValueNew);
 145     // rename the key
 146   bool  Rename(const wxChar *szNewName);
 147     // copy value to another key possibly changing its name (by default it will
 148     // remain the same)
 149   bool  CopyValue(const wxChar *szValue, wxRegKey& keyDst,
 150                   const wxChar *szNewName = NULL);
 151     // copy the entire contents of the key recursively to another location
 152   bool  Copy(const wxChar *szNewName);
 153     // same as Copy() but using a key and not the name
 154   bool  Copy(wxRegKey& keyDst);
 155     // close the key (will be automatically done in dtor)
 156   bool  Close();
 157
 158   // deleting keys/values
 159     // deletes this key and all of it's subkeys/values
 160   bool  DeleteSelf();
 161     // deletes the subkey with all of it's subkeys/values recursively
 162   bool  DeleteKey(const wxChar *szKey);
 163     // deletes the named value (may be NULL to remove the default value)
 164   bool  DeleteValue(const wxChar *szValue);
 165
 166   // access to values and subkeys
 167     // get value type
 168   ValueType GetValueType(const wxChar *szValue) const;
 169     // returns TRUE if the value contains a number (else it's some string)
 170   bool IsNumericValue(const wxChar *szValue) const;
 171
 172     // assignment operators set the default value of the key
 173   wxRegKey& operator=(const wxString& strValue)
 174     { SetValue(NULL, strValue); return *this; }
 175   wxRegKey& operator=(long lValue)
 176     { SetValue(NULL, lValue); return *this; }
 177
 178     // query the default value of the key: implicitly or explicitly
 179   wxString QueryDefaultValue() const;
 180   operator wxString() const { return QueryDefaultValue(); }
 181
 182     // named values
 183
 184     // set the string value
 185   bool  SetValue(const wxChar *szValue, const wxString& strValue);
 186     // retrieve the string value
 187   bool  QueryValue(const wxChar *szValue, wxString& strValue) const
 188     { return QueryValue(szValue, strValue, FALSE); }
 189     // retrieve raw string value
 190   bool  QueryRawValue(const wxChar *szValue, wxString& strValue) const
 191     { return QueryValue(szValue, strValue, TRUE); }
 192     // retrieve either raw or expanded string value
 193   bool  QueryValue(const wxChar *szValue, wxString& strValue, bool raw) const;
 194
 195 #ifdef  __WIN32__
 196     // set the numeric value
 197   bool  SetValue(const wxChar *szValue, long lValue);
 198     // return the numeric value
 199   bool  QueryValue(const wxChar *szValue, long *plValue) const;
 200     // set the binary value
 201   bool  SetValue(const wxChar *szValue, const wxMemoryBuffer& buf);
 202     // return the binary value
 203   bool  QueryValue(const wxChar *szValue, wxMemoryBuffer& buf) const;
 204 #endif  //Win32
 205
 206   // query existence of a key/value
 207     // return true if value exists
 208   bool HasValue(const wxChar *szKey) const;
 209     // return true if given subkey exists
 210   bool HasSubKey(const wxChar *szKey) const;
 211     // return true if any subkeys exist
 212   bool HasSubkeys() const;
 213     // return true if any values exist
 214   bool HasValues() const;
 215     // return true if the key is empty (nothing under this key)
 216   bool IsEmpty() const { return !HasSubkeys() && !HasValues(); }
 217
 218   // enumerate values and subkeys
 219   bool  GetFirstValue(wxString& strValueName, long& lIndex);
 220   bool  GetNextValue (wxString& strValueName, long& lIndex) const;
 221
 222   bool  GetFirstKey  (wxString& strKeyName  , long& lIndex);
 223   bool  GetNextKey   (wxString& strKeyName  , long& lIndex) const;
 224
 225   // for wxRegConfig usage only: preallocate some memory for the name
 226   void ReserveMemoryForName(size_t bytes) { m_strKey.reserve(bytes); }
 227
 228 private:
 229   // common part of all ctors
 230   void Init()
 231   {
 232     m_hKey = (WXHKEY) NULL;
 233     m_dwLastError = 0;
 234   }
 235
 236   // no copy ctor/assignment operator
 237   wxRegKey(const wxRegKey& key);            // not implemented
 238   wxRegKey& operator=(const wxRegKey& key); // not implemented
 239
 240   WXHKEY      m_hKey,           // our handle
 241               m_hRootKey;       // handle of the top key (i.e. StdKey)
 242   wxString    m_strKey;         // key name (relative to m_hRootKey)
 243
 244   long        m_dwLastError;    // last error (0 if none)
 245 };
 246
 247 #endif  //_REGISTRY_H
 248