wxConfig clean up and bug fix for record defaults

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

diff --git a/src/msw/utils.cpp b/src/msw/utils.cpp
index f9db6a472b51f1a2914aa9e8784bf4208478bc68..590486daf8f55fc2438e227b38e203308f8745f4 100644 (file)
--- a/src/msw/utils.cpp
+++ b/src/msw/utils.cpp
@@ -31,9 +31,11 @@
 #ifndef WX_PRECOMP
     #include "wx/utils.h"
     #include "wx/app.h"
-    #include "wx/cursor.h"
     #include "wx/intl.h"
     #include "wx/log.h"
+#if wxUSE_GUI
+    #include "wx/cursor.h"
+#endif
 #endif  //WX_PRECOMP
 
 // In some mingws there is a missing extern "C" int the winsock header,
@@ -103,8 +105,6 @@ extern "C" {
 
 #include "wx/ioswrap.h"
 
-#include "wx/ioswrap.h"
-
 /* Need to undef new if including crtdbg.h */
 #  ifdef new
 #  undef new
@@ -449,6 +449,101 @@ bool wxDirExists(const wxString& dir)
 #endif // Win32/16
 }
 
+bool wxGetDiskSpace(const wxString& path, wxLongLong *pTotal, wxLongLong *pFree)
+{
+    if ( path.empty() )
+        return FALSE;
+
+// old w32api don't have ULARGE_INTEGER
+#if defined(__WIN32__) && \
+    (!defined(__GNUWIN32__) || wxCHECK_W32API_VERSION( 0, 3 ))
+    // GetDiskFreeSpaceEx() is not available under original Win95, check for
+    // it
+    typedef BOOL (*GetDiskFreeSpaceEx_t)(LPCTSTR,
+                                         PULARGE_INTEGER,
+                                         PULARGE_INTEGER,
+                                         PULARGE_INTEGER);
+
+    GetDiskFreeSpaceEx_t
+        pGetDiskFreeSpaceEx = (GetDiskFreeSpaceEx_t)::GetProcAddress
+                              (
+                                ::GetModuleHandle(_T("kernel32.dll")),
+#if wxUSE_UNICODE
+                                "GetDiskFreeSpaceExW"
+#else
+                                "GetDiskFreeSpaceExA"
+#endif
+                              );
+
+    if ( pGetDiskFreeSpaceEx )
+    {
+        ULARGE_INTEGER bytesFree, bytesTotal;
+
+        // may pass the path as is, GetDiskFreeSpaceEx() is smart enough
+        if ( !pGetDiskFreeSpaceEx(path,
+                                  &bytesFree,
+                                  &bytesTotal,
+                                  NULL) )
+        {
+            wxLogLastError(_T("GetDiskFreeSpaceEx"));
+
+            return FALSE;
+        }
+
+        if ( pTotal )
+        {
+            *pTotal = wxLongLong(bytesTotal.HighPart, bytesTotal.LowPart);
+        }
+
+        if ( pFree )
+        {
+            *pFree = wxLongLong(bytesFree.HighPart, bytesFree.LowPart);
+        }
+    }
+    else
+#endif // Win32
+    {
+        // there's a problem with drives larger than 2GB, GetDiskFreeSpaceEx()
+        // should be used instead - but if it's not available, fall back on
+        // GetDiskFreeSpace() nevertheless...
+
+        DWORD lSectorsPerCluster,
+              lBytesPerSector,
+              lNumberOfFreeClusters,
+              lTotalNumberOfClusters;
+
+        // FIXME: this is wrong, we should extract the root drive from path
+        //        instead, but this is the job for wxFileName...
+        if ( !::GetDiskFreeSpace(path,
+                                 &lSectorsPerCluster,
+                                 &lBytesPerSector,
+                                 &lNumberOfFreeClusters,
+                                 &lTotalNumberOfClusters) )
+        {
+            wxLogLastError(_T("GetDiskFreeSpace"));
+
+            return FALSE;
+        }
+
+        wxLongLong lBytesPerCluster = lSectorsPerCluster;
+        lBytesPerCluster *= lBytesPerSector;
+
+        if ( pTotal )
+        {
+            *pTotal = lBytesPerCluster;
+            *pTotal *= lTotalNumberOfClusters;
+        }
+
+        if ( pFree )
+        {
+            *pFree = lBytesPerCluster;
+            *pFree *= lNumberOfFreeClusters;
+        }
+    }
+
+    return TRUE;
+}
+
 // ----------------------------------------------------------------------------
 // env vars
 // ----------------------------------------------------------------------------
@@ -1286,59 +1381,47 @@ void wxClientDisplayRect(int *x, int *y, int *width, int *height)
 wxString WXDLLEXPORT wxGetWindowText(WXHWND hWnd)
 {
     wxString str;
-    int len = GetWindowTextLength((HWND)hWnd) + 1;
-    GetWindowText((HWND)hWnd, str.GetWriteBuf(len), len);
-    str.UngetWriteBuf();
+
+    if ( hWnd )
+    {
+        int len = GetWindowTextLength((HWND)hWnd) + 1;
+        ::GetWindowText((HWND)hWnd, str.GetWriteBuf(len), len);
+        str.UngetWriteBuf();
+    }
 
     return str;
 }
 
 wxString WXDLLEXPORT wxGetWindowClass(WXHWND hWnd)
 {
-#ifdef __WXMICROWIN__
-    // MICROWIN_TODO
-    return wxEmptyString;
-#else
     wxString str;
 
-    int len = 256; // some starting value
-
-    for ( ;; )
+    // MICROWIN_TODO
+#ifndef __WXMICROWIN__
+    if ( hWnd )
     {
-        // as we've #undefined GetClassName we must now manually choose the
-        // right function to call
-        int count =
-
-        #ifndef __WIN32__
-            GetClassName
-        #else // Win32
-            #ifdef UNICODE
-                GetClassNameW
-            #else // !Unicode
-                #ifdef __TWIN32__
-                    GetClassName
-                #else // !Twin32
-                    GetClassNameA
-                #endif // Twin32/!Twin32
-            #endif // Unicode/ANSI
-        #endif // Win16/32
-                                    ((HWND)hWnd, str.GetWriteBuf(len), len);
+        int len = 256; // some starting value
 
-        str.UngetWriteBuf();
-        if ( count == len )
-        {
-            // the class name might have been truncated, retry with larger
-            // buffer
-            len *= 2;
-        }
-        else
+        for ( ;; )
         {
-            break;
+            int count = ::GetClassName((HWND)hWnd, str.GetWriteBuf(len), len);
+
+            str.UngetWriteBuf();
+            if ( count == len )
+            {
+                // the class name might have been truncated, retry with larger
+                // buffer
+                len *= 2;
+            }
+            else
+            {
+                break;
+            }
         }
     }
+#endif // !__WXMICROWIN__
 
     return str;
-#endif
 }
 
 WXWORD WXDLLEXPORT wxGetWindowId(WXHWND hWnd)