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 #ifdef __GNUG__
  16 #pragma interface "registry.h"
  17 #endif
  18
  19 // ----------------------------------------------------------------------------
  20 // mutable hack (see also registry.cpp)
  21 // ----------------------------------------------------------------------------
  22 #if   wxUSE_MUTABLE
  23   #define MUTABLE mutable
  24 #else
  25   #define MUTABLE
  26 #endif
  27
  28 // ----------------------------------------------------------------------------
  29 // types used in this module
  30 // ----------------------------------------------------------------------------
  31
  32 /*
  33 #ifndef   HKEY_DEFINED
  34   #define HKEY_DEFINED
  35   #define HKEY unsigned long
  36 #endif
  37 */
  38
  39 typedef unsigned long ulong;
  40
  41 // ----------------------------------------------------------------------------
  42 // class wxRegKey encapsulates window HKEY handle
  43 // ----------------------------------------------------------------------------
  44 class WXDLLEXPORT wxRegKey
  45 {
  46 public:
  47   // NB: do _not_ change the values of elements in these enumerations!
  48
  49   // registry value types (with comments from winnt.h)
  50   enum ValueType
  51   {
  52     Type_None,                       // No value type
  53     Type_String,                     // Unicode nul terminated string
  54 #ifdef  __WIN32__
  55     Type_Expand_String,              // Unicode nul terminated string
  56                                      // (with environment variable references)
  57     Type_Binary,                     // Free form binary
  58     Type_Dword,                      // 32-bit number
  59     Type_Dword_little_endian         // 32-bit number
  60         = Type_Dword,                // (same as Type_DWORD)
  61     Type_Dword_big_endian,           // 32-bit number
  62     Type_Link,                       // Symbolic Link (unicode)
  63     Type_Multi_String,               // Multiple Unicode strings
  64     Type_Resource_list,              // Resource list in the resource map
  65     Type_Full_resource_descriptor,   // Resource list in the hardware description
  66     Type_Resource_requirements_list  // ???
  67 #endif  //WIN32
  68   };
  69
  70   // predefined registry keys
  71   enum StdKey
  72   {
  73     HKCR        // classes root
  74 #ifdef  __WIN32__
  75     ,
  76     HKCU,       // current user
  77     HKLM,       // local machine
  78     HKUSR,      // users
  79     HKPD        // performance data (WinNT/2K only)
  80 #if WINVER >= 0x0400
  81     ,
  82     HKCC,       // current config (starting from Win95/NT 4.0)
  83     HKDD        // dynamic data (Win95/98 only)
  84 #endif  // Winver
  85 #endif  // Win32/16
  86   };
  87
  88   // information about standard (predefined) registry keys
  89     // number of standard keys
  90   static const size_t nStdKeys;
  91     // get the name of a standard key
  92   static const wxChar *GetStdKeyName(size_t key);
  93     // get the short name of a standard key
  94   static const wxChar *GetStdKeyShortName(size_t key);
  95     // get StdKey from root HKEY
  96   static StdKey GetStdKeyFromHkey(WXHKEY hkey);
  97
  98   // extacts the std key prefix from the string (return value) and
  99   // leaves only the part after it (i.e. modifies the string passed!)
 100   static StdKey ExtractKeyName(wxString& str);
 101
 102   // ctors
 103     // root key is set to HKCR (the only root key under Win16)
 104   wxRegKey();
 105     // strKey is the full name of the key (i.e. starting with HKEY_xxx...)
 106   wxRegKey(const wxString& strKey);
 107     // strKey is the name of key under (standard key) keyParent
 108   wxRegKey(StdKey keyParent, const wxString& strKey);
 109     // strKey is the name of key under (previously created) keyParent
 110   wxRegKey(const wxRegKey& keyParent, const wxString& strKey);
 111     //
 112  ~wxRegKey();
 113
 114   // change key (closes the previously opened key if any)
 115     // the name is absolute, i.e. should start with HKEY_xxx
 116   void  SetName(const wxString& strKey);
 117     // the name is relative to the parent key
 118   void  SetName(StdKey keyParent, const wxString& strKey);
 119     // the name is relative to the parent key
 120   void  SetName(const wxRegKey& keyParent, const wxString& strKey);
 121     // hKey should be opened and will be closed in wxRegKey dtor
 122   void  SetHkey(WXHKEY hKey);
 123
 124   // get infomation about the key
 125     // get the (full) key name. Abbreviate std root keys if bShortPrefix.
 126   wxString GetName(bool bShortPrefix = TRUE) const;
 127     // return true if the key exists
 128   bool  Exists() const;
 129     // get the info about key (any number of these pointers may be NULL)
 130   bool  GetKeyInfo(size_t *pnSubKeys,      // number of subkeys
 131                    size_t *pnMaxKeyLen,    // max len of subkey name
 132                    size_t *pnValues,       // number of values
 133                    size_t *pnMaxValueLen) const;
 134     // return true if the key is opened
 135   bool  IsOpened() const { return m_hKey != 0; }
 136     // for "if ( !key ) wxLogError(...)" kind of expressions
 137   operator bool()  const { return m_dwLastError == 0; }
 138
 139   // operations on the key itself
 140     // explicitly open the key (will be automatically done by all functions
 141     // which need the key to be opened if the key is not opened yet)
 142   bool  Open();
 143     // create the key: will fail if the key already exists and !bOkIfExists
 144   bool  Create(bool bOkIfExists = TRUE);
 145     // rename a value from old name to new one
 146   bool  RenameValue(const wxChar *szValueOld, const wxChar *szValueNew);
 147     // rename the key
 148   bool  Rename(const wxChar *szNewName);
 149     // copy value to another key possibly changing its name (by default it will
 150     // remain the same)
 151   bool  CopyValue(const wxChar *szValue, wxRegKey& keyDst,
 152                   const wxChar *szNewName = NULL);
 153     // copy the entire contents of the key recursively to another location
 154   bool  Copy(const wxChar *szNewName);
 155     // same as Copy() but using a key and not the name
 156   bool  Copy(wxRegKey& keyDst);
 157     // close the key (will be automatically done in dtor)
 158   bool  Close();
 159
 160   // deleting keys/values
 161     // deletes this key and all of it's subkeys/values
 162   bool  DeleteSelf();
 163     // deletes the subkey with all of it's subkeys/values recursively
 164   bool  DeleteKey(const wxChar *szKey);
 165     // deletes the named value (may be NULL to remove the default value)
 166   bool  DeleteValue(const wxChar *szValue);
 167
 168   // access to values and subkeys
 169     // get value type
 170   ValueType GetValueType(const wxChar *szValue) const;
 171     // returns TRUE if the value contains a number (else it's some string)
 172   bool IsNumericValue(const wxChar *szValue) const;
 173
 174     // assignment operators set the default value of the key
 175   wxRegKey& operator=(const wxString& strValue)
 176     { SetValue(NULL, strValue); return *this; }
 177   wxRegKey& operator=(long lValue)
 178     { SetValue(NULL, lValue); return *this; }
 179
 180     // conversion operators query the default value of the key
 181   operator wxString() const;
 182
 183     // set the string value
 184   bool  SetValue(const wxChar *szValue, const wxString& strValue);
 185     // return the string value
 186   bool  QueryValue(const wxChar *szValue, wxString& strValue) const;
 187
 188 #ifdef  __WIN32__
 189     // set the numeric value
 190   bool  SetValue(const wxChar *szValue, long lValue);
 191     // return the numeric value
 192   bool  QueryValue(const wxChar *szValue, long *plValue) const;
 193 #endif  //Win32
 194
 195   // query existence of a key/value
 196     // return true if value exists
 197   bool HasValue(const wxChar *szKey) const;
 198     // return true if given subkey exists
 199   bool HasSubKey(const wxChar *szKey) const;
 200     // return true if any subkeys exist
 201   bool HasSubkeys() const;
 202     // return true if any values exist
 203   bool HasValues() const;
 204     // return true if the key is empty (nothing under this key)
 205   bool IsEmpty() const { return !HasSubkeys() && !HasValues(); }
 206
 207   // enumerate values and subkeys
 208   bool  GetFirstValue(wxString& strValueName, long& lIndex);
 209   bool  GetNextValue (wxString& strValueName, long& lIndex) const;
 210
 211   bool  GetFirstKey  (wxString& strKeyName  , long& lIndex);
 212   bool  GetNextKey   (wxString& strKeyName  , long& lIndex) const;
 213
 214 private:
 215   // no copy ctor/assignment operator
 216   wxRegKey(const wxRegKey& key);            // not implemented
 217   wxRegKey& operator=(const wxRegKey& key); // not implemented
 218
 219   WXHKEY      m_hKey,           // our handle
 220               m_hRootKey;       // handle of the top key (i.e. StdKey)
 221   wxString    m_strKey;         // key name (relative to m_hRootKey)
 222
 223   MUTABLE long m_dwLastError;   // last error (0 if none)
 224 };
 225
 226 #endif  //_REGISTRY_H
 227