fixed memory leak in wxNativeFontInfo when using Pango

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@28146 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/fontutil.h

@@ -135,6 +135,11 @@ public:
     // default ctor (default copy ctor is ok)
     wxNativeFontInfo() { Init(); }
 
+#if wxUSE_PANGO
+    wxNativeFontInfo(const wxNativeFontInfo& info);
+    ~wxNativeFontInfo();
+#endif
+
     // reset to the default state
     void Init();
 

src/gtk/control.cpp

@@ -204,7 +204,7 @@ wxControl::GetDefaultAttributesFromGTKWidget(GtkWidget* widget,
     if ( style && style->font_desc )
     {  
         wxNativeFontInfo info;  
-        info.description = style->font_desc;  
+        info.description = pango_font_description_copy(style->font_desc);
         attr.font = wxFont(info);  
     }  
     else  

src/gtk/settings.cpp

@@ -308,7 +308,8 @@ wxFont wxSystemSettingsNative::GetFont( wxSystemFont index )
                 if ( def && def->font_desc )
                 {  
                     wxNativeFontInfo info;  
-                    info.description = def->font_desc;  
+                    info.description = 
+                        pango_font_description_copy(def->font_desc);
                     gs_objects.m_fontSystem = wxFont(info);  
                 }  
                 else  

src/gtk1/control.cpp

@@ -204,7 +204,7 @@ wxControl::GetDefaultAttributesFromGTKWidget(GtkWidget* widget,
     if ( style && style->font_desc )
     {  
         wxNativeFontInfo info;  
-        info.description = style->font_desc;  
+        info.description = pango_font_description_copy(style->font_desc);
         attr.font = wxFont(info);  
     }  
     else  

src/gtk1/settings.cpp

@@ -308,7 +308,8 @@ wxFont wxSystemSettingsNative::GetFont( wxSystemFont index )
                 if ( def && def->font_desc )
                 {  
                     wxNativeFontInfo info;  
-                    info.description = def->font_desc;  
+                    info.description = 
+                        pango_font_description_copy(def->font_desc);
                     gs_objects.m_fontSystem = wxFont(info);  
                 }  
                 else  

src/unix/fontutil.cpp

@@ -57,6 +57,20 @@ void wxNativeFontInfo::Init()
     description = NULL;
 }
 
+wxNativeFontInfo::wxNativeFontInfo(const wxNativeFontInfo& info)
+{
+    if (info.description)
+        description = pango_font_description_copy(info.description);
+    else
+        description = NULL;            
+}
+
+wxNativeFontInfo::~wxNativeFontInfo()
+{
+    if (description)
+        pango_font_description_free(description);
+}
+
 int wxNativeFontInfo::GetPointSize() const
 {
     return pango_font_description_get_size( description ) / PANGO_SCALE;