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   USE_MUTABLE
  23   #define MUTABLE mutable
  24 #else
  25   #define MUTABLE
  26 #endif
  27
  28 // ----------------------------------------------------------------------------
  29 // types used in this module
  30 // ----------------------------------------------------------------------------
  31 #ifndef   HKEY_DEFINED
  32   #define HKEY_DEFINED
  33   #define HKEY unsigned long
  34 #endif
  35
  36 typedef unsigned long ulong;
  37
  38 // ----------------------------------------------------------------------------
  39 // class wxRegKey encapsulates window HKEY handle
  40 // ----------------------------------------------------------------------------
  41 class WXDLLEXPORT wxRegKey
  42 {
  43 public:
  44   // NB: do _not_ change the values of elements in these enumerations!
  45
  46   // registry value types (with comments from winnt.h)
  47   enum ValueType
  48   {
  49     Type_None,                       // No value type
  50     Type_String,                     // Unicode nul terminated string
  51 #ifdef  __WIN32__
  52     Type_Expand_String,              // Unicode nul terminated string
  53                                      // (with environment variable references)
  54     Type_Binary,                     // Free form binary
  55     Type_Dword,                      // 32-bit number
  56     Type_Dword_little_endian,        // 32-bit number (same as Type_DWORD)
  57     Type_Dword_big_endian,           // 32-bit number
  58     Type_Link,                       // Symbolic Link (unicode)
  59     Type_Multi_String,               // Multiple Unicode strings
  60     Type_Resource_list,              // Resource list in the resource map
  61     Type_Full_resource_descriptor,   // Resource list in the hardware description
  62     Type_Resource_requirements_list, // ???
  63 #endif  //WIN32
  64   };
  65
  66   // predefined registry keys
  67   enum StdKey
  68   {
  69     HKCR,     // classes root
  70 #ifdef  __WIN32__
  71     HKCU,     // current user
  72     HKLM,     // local machine
  73     HKUSR,    // users
  74     HKPD,     // performance data (@@ NT only?)
  75 #if    WINVER >= 0x0400
  76     HKCC,     // current config
  77     HKDD,     // dynamic data
  78 #endif  // Winver
  79 #endif  // Win32/16
  80   };
  81
  82   // information about standard (predefined) registry keys
  83     // number of standard keys
  84   static const size_t nStdKeys;
  85     // get the name of a standard key
  86   static const char *GetStdKeyName(uint key);
  87     // get the short name of a standard key
  88   static const char *GetStdKeyShortName(uint key);
  89     // get StdKey from root HKEY
  90   static StdKey GetStdKeyFromHkey(HKEY hkey);
  91
  92   // extacts the std key prefix from the string (return value) and
  93   // leaves only the part after it (i.e. modifies the string passed!)
  94   static StdKey ExtractKeyName(wxString& str);
  95
  96   // ctors
  97     // root key is set to HKCR (the only root key under Win16)
  98   wxRegKey();
  99     // strKey is the full name of the key (i.e. starting with HKEY_xxx...)
 100   wxRegKey(const wxString& strKey);
 101     // strKey is the name of key under (standard key) keyParent
 102   wxRegKey(StdKey keyParent, const wxString& strKey);
 103     // strKey is the name of key under (previously created) keyParent
 104   wxRegKey(const wxRegKey& keyParent, const wxString& strKey);
 105     //
 106  ~wxRegKey();
 107
 108   // change key (closes the previously opened key if any)
 109     // the name is absolute, i.e. should start with HKEY_xxx
 110   void  SetName(const wxString& strKey);
 111     // the name is relative to the parent key
 112   void  SetName(StdKey keyParent, const wxString& strKey);
 113     // the name is relative to the parent key
 114   void  SetName(const wxRegKey& keyParent, const wxString& strKey);
 115     // hKey should be opened and will be closed in wxRegKey dtor
 116   void  SetHkey(HKEY hKey);
 117
 118   // get infomation about the key
 119     // get the (full) key name. Abbreviate std root keys if bShortPrefix.
 120   wxString GetName(bool bShortPrefix = TRUE) const;
 121     // return true if the key exists
 122   bool  Exists() const;
 123     // get the info about key (any number of these pointers may be NULL)
 124   bool  GetKeyInfo(ulong *pnSubKeys,      // number of subkeys
 125                    ulong *pnMaxKeyLen,    // max len of subkey name
 126                    ulong *pnValues,       // number of values
 127                    ulong *pnMaxValueLen) const;
 128     // return true if the key is opened
 129   bool  IsOpened() const { return m_hKey != 0; }
 130     // for "if ( !key ) wxLogError(...)" kind of expressions
 131   operator bool()  const { return m_dwLastError == 0; }
 132
 133   // operations on the key itself
 134     // explicitly open the key (will be automatically done by all functions
 135     // which need the key to be opened if the key is not opened yet)
 136   bool  Open();
 137     // create the key: will fail if the key already exists and bOkIfExists
 138   bool  Create(bool bOkIfExists = TRUE);
 139     // close the key (will be automatically done in dtor)
 140   bool  Close();
 141
 142   // deleting keys/values
 143     // deletes this key and all of it's subkeys/values
 144   bool  DeleteSelf();
 145     // deletes the subkey with all of it's subkeys/values recursively
 146   bool  DeleteKey(const char *szKey);
 147     // deletes the named value (may be NULL to remove the default value)
 148   bool  DeleteValue(const char *szValue);
 149
 150   // access to values and subkeys
 151     // get value type
 152   ValueType GetValueType(const char *szValue);
 153
 154     // assignment operators set the default value of the key
 155   wxRegKey& operator=(const wxString& strValue)
 156     { SetValue(NULL, strValue); return *this; }
 157   wxRegKey& operator=(long lValue)
 158     { SetValue(NULL, lValue); return *this; }
 159
 160     // conversion operators query the default value of the key
 161   operator wxString() const;
 162
 163     // set the string value
 164   bool  SetValue(const char *szValue, const wxString& strValue);
 165     // return the string value
 166   bool  QueryValue(const char *szValue, wxString& strValue) const;
 167
 168 #ifdef  __WIN32__
 169     // set the numeric value
 170   bool  SetValue(const char *szValue, long lValue);
 171     // return the numeric value
 172   bool  QueryValue(const char *szValue, long *plValue) const;
 173 #endif  //Win32
 174
 175   // query existence of a key/value
 176     // return true if value exists
 177   bool  HasValue(const char *szKey) const;
 178     // return true if given subkey exists
 179   bool  HasSubKey(const char *szKey) const;
 180     // return true if any subkeys exist
 181   bool  HasSubkeys() const;
 182
 183   // enumerate values and subkeys
 184   bool  GetFirstValue(wxString& strValueName, long& lIndex);
 185   bool  GetNextValue (wxString& strValueName, long& lIndex) const;
 186
 187   bool  GetFirstKey  (wxString& strKeyName  , long& lIndex);
 188   bool  GetNextKey   (wxString& strKeyName  , long& lIndex) const;
 189
 190 private:
 191   // no copy ctor/assignment operator
 192   wxRegKey(const wxRegKey& key);            // not implemented
 193   wxRegKey& operator=(const wxRegKey& key); // not implemented
 194
 195   HKEY        m_hKey,           // our handle
 196               m_hRootKey;       // handle of the top key (i.e. StdKey)
 197   wxString    m_strKey;         // key name (relative to m_hRootKey)
 198
 199   MUTABLE long m_dwLastError;   // last error (0 if none)
 200 };
 201
 202 #endif  //_REGISTRY_H
 203