wxSystemSettings class API face lift: better names for its methods

[wxWidgets.git] / src / msw / registry.cpp

diff --git a/src/msw/registry.cpp b/src/msw/registry.cpp
index a761867e7df6cce8dd08a7e6c3df23697e54f900..34e7c891a51efc34d8acec68f80f7ce97b581c76 100644 (file)
--- a/src/msw/registry.cpp
+++ b/src/msw/registry.cpp
@@ -27,7 +27,6 @@
 #include  "wx/string.h"
 #include  "wx/intl.h"
 #include  "wx/log.h"
-#include  "wx/config.h"    // for wxExpandEnvVars
 
 #ifndef __WIN16__
 
@@ -92,12 +91,12 @@ aStdKeys[] =
 // ----------------------------------------------------------------------------
 // macros
 // ----------------------------------------------------------------------------
-// @ const_cast<> is not yet supported by all compilers
+
+// const_cast<> is not yet supported by all compilers
 #define CONST_CAST    ((wxRegKey *)this)->
 
-#if   !USE_MUTABLE
-  #define m_dwLastError   CONST_CAST m_dwLastError
-#endif
+// and neither is mutable which m_dwLastError should be
+#define m_dwLastError   CONST_CAST m_dwLastError
 
 // ----------------------------------------------------------------------------
 // non member functions
@@ -187,16 +186,16 @@ wxRegKey::StdKey wxRegKey::GetStdKeyFromHkey(WXHKEY hkey)
 
 wxRegKey::wxRegKey()
 {
-  m_hKey = 0;
   m_hRootKey = (WXHKEY) aStdKeys[HKCR].hkey;
-  m_dwLastError = 0;
+
+  Init();
 }
 
 wxRegKey::wxRegKey(const wxString& strKey) : m_strKey(strKey)
 {
   m_hRootKey  = (WXHKEY) aStdKeys[ExtractKeyName(m_strKey)].hkey;
-  m_hKey      = (WXHKEY) NULL;
-  m_dwLastError = 0;
+
+  Init();
 }
 
 // parent is a predefined (and preopened) key
@@ -204,8 +203,8 @@ wxRegKey::wxRegKey(StdKey keyParent, const wxString& strKey) : m_strKey(strKey)
 {
   RemoveTrailingSeparator(m_strKey);
   m_hRootKey  = (WXHKEY) aStdKeys[keyParent].hkey;
-  m_hKey      = (WXHKEY) NULL;
-  m_dwLastError = 0;
+
+  Init();
 }
 
 // parent is a normal regkey
@@ -222,8 +221,8 @@ wxRegKey::wxRegKey(const wxRegKey& keyParent, const wxString& strKey)
   RemoveTrailingSeparator(m_strKey);
 
   m_hRootKey  = keyParent.m_hRootKey;
-  m_hKey      = (WXHKEY) NULL;
-  m_dwLastError = 0;
+
+  Init();
 }
 
 // dtor closes the key releasing system resource
@@ -261,7 +260,14 @@ void wxRegKey::SetName(const wxRegKey& keyParent, const wxString& strKey)
   Close();
 
   // combine our name with parent's to get the full name
-  m_strKey = keyParent.m_strKey;
+
+  // NB: this method is called by wxRegConfig::SetPath() which is a performance
+  //     critical function and so it preallocates space for our m_strKey to
+  //     gain some speed - this is why we only use += here and not = which
+  //     would just free the prealloc'd buffer and would have to realloc it the
+  //     next line!
+  m_strKey.clear();
+  m_strKey += keyParent.m_strKey;
   if ( !strKey.IsEmpty() && strKey[0] != REG_SEPARATOR )
     m_strKey += REG_SEPARATOR;
   m_strKey += strKey;
@@ -310,12 +316,15 @@ bool wxRegKey::GetKeyInfo(size_t *pnSubKeys,
 #if defined(__WIN32__) && !defined(__TWIN32__)
 
     // old gcc headers incorrectly prototype RegQueryInfoKey()
-#ifdef __GNUWIN32_OLD__
+#if defined(__GNUWIN32_OLD__) && !defined(__CYGWIN10__)
     #define REG_PARAM   (size_t *)
 #else
     #define REG_PARAM   (LPDWORD)
 #endif
 
+  // it might be unexpected to some that this function doesn't open the key
+  wxASSERT_MSG( IsOpened(), _T("key should be opened in GetKeyInfo") );
+
   m_dwLastError = ::RegQueryInfoKey
                   (
                     (HKEY) m_hKey,
@@ -343,8 +352,8 @@ bool wxRegKey::GetKeyInfo(size_t *pnSubKeys,
                   GetName().c_str());
     return FALSE;
   }
-  else
-    return TRUE;
+
+  return TRUE;
 #else // Win16
   wxFAIL_MSG("GetKeyInfo() not implemented");
 
@@ -406,16 +415,14 @@ bool wxRegKey::Close()
 {
   if ( IsOpened() ) {
     m_dwLastError = RegCloseKey((HKEY) m_hKey);
+    m_hKey = 0;
+
     if ( m_dwLastError != ERROR_SUCCESS ) {
       wxLogSysError(m_dwLastError, _("Can't close registry key '%s'"),
                     GetName().c_str());
 
-      m_hKey = 0;
       return FALSE;
     }
-    else {
-      m_hKey = 0;
-    }
   }
 
   return TRUE;
@@ -618,8 +625,9 @@ bool wxRegKey::DeleteSelf()
   // prevent a buggy program from erasing one of the root registry keys or an
   // immediate subkey (i.e. one which doesn't have '\\' inside) of any other
   // key except HKCR (HKCR has some "deleteable" subkeys)
-  if ( m_strKey.IsEmpty() || (m_hRootKey != HKCR &&
-       m_strKey.Find(REG_SEPARATOR) == wxNOT_FOUND) ) {
+  if ( m_strKey.IsEmpty() ||
+       ((m_hRootKey != (WXHKEY) aStdKeys[HKCR].hkey) &&
+        (m_strKey.Find(REG_SEPARATOR) == wxNOT_FOUND)) ) {
       wxLogError(_("Registry key '%s' is needed for normal system operation,\ndeleting it will leave your system in unusable state:\noperation aborted."), GetFullName(this));
 
       return FALSE;
@@ -823,7 +831,9 @@ bool wxRegKey::QueryValue(const wxChar *szValue, long *plValue) const
 
 #endif  //Win32
 
-bool wxRegKey::QueryValue(const wxChar *szValue, wxString& strValue) const
+bool wxRegKey::QueryValue(const wxChar *szValue,
+                          wxString& strValue,
+                          bool raw) const
 {
   if ( CONST_CAST Open() ) {
     #ifdef  __WIN32__
@@ -846,6 +856,30 @@ bool wxRegKey::QueryValue(const wxChar *szValue, wxString& strValue) const
                                             pBuf,
                                             &dwSize);
             strValue.UngetWriteBuf();
+
+            // expand the var expansions in the string unless disabled
+            if ( (dwType == REG_EXPAND_SZ) && !raw )
+            {
+                DWORD dwExpSize = ::ExpandEnvironmentStrings(strValue, NULL, 0);
+                bool ok = dwExpSize != 0;
+                if ( ok )
+                {
+                    wxString strExpValue;
+                    ok = ::ExpandEnvironmentStrings
+                           (
+                            strValue,
+                            strExpValue.GetWriteBuf(dwExpSize),
+                            dwExpSize
+                           ) != 0;
+                    strExpValue.UngetWriteBuf();
+                    strValue = strExpValue;
+                }
+
+                if ( !ok )
+                {
+                    wxLogLastError(_T("ExpandEnvironmentStrings"));
+                }
+            }
         }
 
         if ( m_dwLastError == ERROR_SUCCESS ) {