Move wxMSW wxFont private font methods to src/msw/font.cpp

This ensures that they will be defined and work even when building with
wxUSE_GRAPHICS_CONTEXT==0 (as can happen even by default with old MinGW
versions).

Private fonts are still made available to wxGraphicsContext as well by
providing access to them from GDI+ code via wxGetPrivateFontFileNames().

src/msw/font.cpp

@@ -34,6 +34,7 @@
 #endif // WX_PRECOMP
 
 #include "wx/encinfo.h"
+#include "wx/filename.h"
 #include "wx/fontutil.h"
 #include "wx/fontmap.h"
 
@@ -1083,3 +1084,49 @@ bool wxFont::IsFixedWidth() const
     // those meanings are the opposite of what the constant name implies."
     return !(tm.tmPitchAndFamily & TMPF_FIXED_PITCH);
 }
+
+// ----------------------------------------------------------------------------
+// Private fonts support
+// ----------------------------------------------------------------------------
+
+namespace
+{
+
+// Contains the file names of all fonts added by AddPrivateFont().
+wxArrayString gs_privateFontFileNames;
+
+} // anonymous namespace
+
+// Accessor for use in src/msw/graphics.cpp only.
+extern const wxArrayString& wxGetPrivateFontFileNames()
+{
+    return gs_privateFontFileNames;
+}
+
+bool wxFontBase::AddPrivateFont(const wxString& filename)
+{
+    if ( !wxFileName::FileExists(filename) )
+    {
+        wxLogError(_("Font file \"%s\" doesn't exist."), filename);
+        return false;
+    }
+
+    gs_privateFontFileNames.Add(filename);
+    return true;
+}
+
+bool wxFontBase::ActivatePrivateFonts()
+{
+    const int n = gs_privateFontFileNames.size();
+    for ( int i = 0 ; i < n; i++ )
+    {
+        const wxString& fname = gs_privateFontFileNames[i];
+        if ( !AddFontResourceEx(fname.t_str(), FR_PRIVATE, 0) )
+        {
+            wxLogSysError(_("Font file \"%s\" couldn't be loaded"),
+                          fname);
+        }
+    }
+
+    return true;
+}

src/msw/graphics.cpp

@@ -37,7 +37,6 @@
     #include "wx/dcprint.h"
 #endif
 
-#include "wx/filename.h"
 #include "wx/stack.h"
 
 #include "wx/private/graphics.h"
@@ -967,39 +966,13 @@ wxGDIPlusBrushData::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
 namespace
 {
 
-wxArrayString gs_privateFontFileNames;
 Gdiplus::PrivateFontCollection* gs_privateFonts = NULL;
 Gdiplus::FontFamily* gs_pFontFamily = NULL;
 
 } // anonymous namespace
 
-bool wxFontBase::AddPrivateFont(const wxString& filename)
-{
-    if ( !wxFileName::FileExists(filename) )
-    {
-        wxLogError(_("Font file \"%s\" doesn't exist."), filename);
-        return false;
-    }
-
-    gs_privateFontFileNames.Add(filename);
-    return true;
-}
-
-bool wxFontBase::ActivatePrivateFonts()
-{
-    const int n = gs_privateFontFileNames.size();
-    for ( int i = 0 ; i < n; i++ )
-    {
-        const wxString& fname = gs_privateFontFileNames[i];
-        if ( !AddFontResourceEx(fname.t_str(), FR_PRIVATE, 0) )
-        {
-            wxLogSysError(_("Font file \"%s\" couldn't be loaded"),
-                          fname);
-        }
-    }
-
-    return true;
-}
+// This function is defined in src/msw/font.cpp.
+extern const wxArrayString& wxGetPrivateFontFileNames();
 
 //-----------------------------------------------------------------------------
 // wxGDIPlusFont implementation
@@ -2343,13 +2316,14 @@ void wxGDIPlusRenderer::Load()
         m_loaded = 1;
 
         // Make private fonts available to GDI+, if any.
-        const int n = gs_privateFontFileNames.size();
+        const wxArrayString& privateFonts = wxGetPrivateFontFileNames();
+        const size_t n = privateFonts.size();
         if ( n )
         {
             gs_privateFonts = new Gdiplus::PrivateFontCollection();
-            for ( int i = 0 ; i < n; i++ )
+            for ( size_t i = 0 ; i < n; i++ )
             {
-                const wxString& fname = gs_privateFontFileNames[i];
+                const wxString& fname = privateFonts[i];
                 gs_privateFonts->AddFontFile(fname.t_str());
             }