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
  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 (same as Type_DWORD)
  60     Type_Dword_big_endian,           // 32-bit number
  61     Type_Link,                       // Symbolic Link (unicode)
  62     Type_Multi_String,               // Multiple Unicode strings
  63     Type_Resource_list,              // Resource list in the resource map
  64     Type_Full_resource_descriptor,   // Resource list in the hardware description
  65     Type_Resource_requirements_list, // ???
  66 #endif  //WIN32
  67   };
  68
  69   // predefined registry keys
  70   enum StdKey
  71   {
  72     HKCR,     // classes root
  73 #ifdef  __WIN32__
  74     HKCU,     // current user
  75     HKLM,     // local machine
  76     HKUSR,    // users
  77     HKPD,     // performance data (@@ NT only?)
  78 #if    WINVER >= 0x0400
  79     HKCC,     // current config
  80     HKDD,     // dynamic data
  81 #endif  // Winver
  82 #endif  // Win32/16
  83   };
  84
  85   // information about standard (predefined) registry keys
  86     // number of standard keys
  87   static const size_t nStdKeys;
  88     // get the name of a standard key
  89   static const char *GetStdKeyName(size_t key);
  90     // get the short name of a standard key
  91   static const char *GetStdKeyShortName(size_t key);
  92     // get StdKey from root HKEY
  93   static StdKey GetStdKeyFromHkey(WXHKEY hkey);
  94
  95   // extacts the std key prefix from the string (return value) and
  96   // leaves only the part after it (i.e. modifies the string passed!)
  97   static StdKey ExtractKeyName(wxString& str);
  98
  99   // ctors
 100     // root key is set to HKCR (the only root key under Win16)
 101   wxRegKey();
 102     // strKey is the full name of the key (i.e. starting with HKEY_xxx...)
 103   wxRegKey(const wxString& strKey);
 104     // strKey is the name of key under (standard key) keyParent
 105   wxRegKey(StdKey keyParent, const wxString& strKey);
 106     // strKey is the name of key under (previously created) keyParent
 107   wxRegKey(const wxRegKey& keyParent, const wxString& strKey);
 108     //
 109  ~wxRegKey();
 110
 111   // change key (closes the previously opened key if any)
 112     // the name is absolute, i.e. should start with HKEY_xxx
 113   void  SetName(const wxString& strKey);
 114     // the name is relative to the parent key
 115   void  SetName(StdKey keyParent, const wxString& strKey);
 116     // the name is relative to the parent key
 117   void  SetName(const wxRegKey& keyParent, const wxString& strKey);
 118     // hKey should be opened and will be closed in wxRegKey dtor
 119   void  SetHkey(WXHKEY hKey);
 120
 121   // get infomation about the key
 122     // get the (full) key name. Abbreviate std root keys if bShortPrefix.
 123   wxString GetName(bool bShortPrefix = TRUE) const;
 124     // return true if the key exists
 125   bool  Exists() const;
 126     // get the info about key (any number of these pointers may be NULL)
 127
 128 #ifdef __GNUWIN32__
 129   bool  GetKeyInfo(size_t *pnSubKeys,      // number of subkeys
 130                    size_t *pnMaxKeyLen,    // max len of subkey name
 131                    size_t *pnValues,       // number of values
 132                    size_t *pnMaxValueLen) const;
 133 #else
 134   bool  GetKeyInfo(ulong *pnSubKeys,      // number of subkeys
 135                    ulong *pnMaxKeyLen,    // max len of subkey name
 136                    ulong *pnValues,       // number of values
 137                    ulong *pnMaxValueLen) const;
 138 #endif
 139     // return true if the key is opened
 140   bool  IsOpened() const { return m_hKey != 0; }
 141     // for "if ( !key ) wxLogError(...)" kind of expressions
 142   operator bool()  const { return m_dwLastError == 0; }
 143
 144   // operations on the key itself
 145     // explicitly open the key (will be automatically done by all functions
 146     // which need the key to be opened if the key is not opened yet)
 147   bool  Open();
 148     // create the key: will fail if the key already exists and bOkIfExists
 149   bool  Create(bool bOkIfExists = TRUE);
 150     // close the key (will be automatically done in dtor)
 151   bool  Close();
 152
 153   // deleting keys/values
 154     // deletes this key and all of it's subkeys/values
 155   bool  DeleteSelf();
 156     // deletes the subkey with all of it's subkeys/values recursively
 157   bool  DeleteKey(const char *szKey);
 158     // deletes the named value (may be NULL to remove the default value)
 159   bool  DeleteValue(const char *szValue);
 160
 161   // access to values and subkeys
 162     // get value type
 163   ValueType GetValueType(const char *szValue);
 164
 165     // assignment operators set the default value of the key
 166   wxRegKey& operator=(const wxString& strValue)
 167     { SetValue(NULL, strValue); return *this; }
 168   wxRegKey& operator=(long lValue)
 169     { SetValue(NULL, lValue); return *this; }
 170
 171     // conversion operators query the default value of the key
 172   operator wxString() const;
 173
 174     // set the string value
 175   bool  SetValue(const char *szValue, const wxString& strValue);
 176     // return the string value
 177   bool  QueryValue(const char *szValue, wxString& strValue) const;
 178
 179 #ifdef  __WIN32__
 180     // set the numeric value
 181   bool  SetValue(const char *szValue, long lValue);
 182     // return the numeric value
 183   bool  QueryValue(const char *szValue, long *plValue) const;
 184 #endif  //Win32
 185
 186   // query existence of a key/value
 187     // return true if value exists
 188   bool  HasValue(const char *szKey) const;
 189     // return true if given subkey exists
 190   bool  HasSubKey(const char *szKey) const;
 191     // return true if any subkeys exist
 192   bool  HasSubkeys() const;
 193
 194   // enumerate values and subkeys
 195   bool  GetFirstValue(wxString& strValueName, long& lIndex);
 196   bool  GetNextValue (wxString& strValueName, long& lIndex) const;
 197
 198   bool  GetFirstKey  (wxString& strKeyName  , long& lIndex);
 199   bool  GetNextKey   (wxString& strKeyName  , long& lIndex) const;
 200
 201 private:
 202   // no copy ctor/assignment operator
 203   wxRegKey(const wxRegKey& key);            // not implemented
 204   wxRegKey& operator=(const wxRegKey& key); // not implemented
 205
 206   WXHKEY        m_hKey,           // our handle
 207               m_hRootKey;       // handle of the top key (i.e. StdKey)
 208   wxString    m_strKey;         // key name (relative to m_hRootKey)
 209
 210   MUTABLE long m_dwLastError;   // last error (0 if none)
 211 };
 212
 213 // ----------------------------------------------------------------------------
 214 // high level functions working with the registry
 215 // ----------------------------------------------------------------------------
 216
 217 // file extensions and MIME types
 218 // ------------------------------
 219
 220 // Look for and return the extension (with leading '.') which corresponds to
 221 // MIME type strMimeType in pExt.
 222 //
 223 // Return value: true if MIME type was found, false otherwise
 224 bool GetExtensionFromMimeType(wxString *pExt, const wxString& strMimeType);
 225
 226 // Look for MIME type of the given extension, return TRUE if found.
 227 bool GetMimeTypeFromExtension(wxString *pMimeType, const wxString& strExt);
 228
 229 // Get file type from extension (it's not the same thing: for example, for
 230 // the extension .txt the default file type is txtfile), return FALSE if not
 231 // found.
 232 bool GetFileTypeFromExtension(wxString *pFileType, const wxString& strExt);
 233
 234 // Get the default icon from file type
 235 class wxIcon;
 236 bool GetFileTypeIcon(wxIcon *pIcon, const wxString& strFileType);
 237
 238 // Get the description of files of this type
 239 bool GetFileTypeDescription(wxString *pDesc, const wxString& strFileType);
 240
 241 #endif  //_REGISTRY_H
 242