Replace wxST_MARKUP style with wxControl::SetLabelMarkup().

This is an incompatible change which removes the wxStaticText-specific
wxST_MARKUP style and adds wxControl::SetLabelMarkup() replacing it.

It doesn't actually change anything yet but it simplifies wxStaticText code a
lot by getting rid of many markup-related functions in it which had to behave
differently depending on whether wxST_MARKUP was used or not and also paves
way for adding markup support for the other controls in the future.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67055 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/ctrlcmn.cpp

@@ -38,6 +38,8 @@
     #include "wx/settings.h"
 #endif
 
+#include "wx/private/markupparser.h"
+
 const char wxControlNameStr[] = "control";
 
 // ============================================================================
@@ -230,6 +232,27 @@ wxControlBase::GetCompositeControlsDefaultAttributes(wxWindowVariant WXUNUSED(va
     return attrs;
 }
 
+// ----------------------------------------------------------------------------
+// wxControl markup support
+// ----------------------------------------------------------------------------
+
+/* static */
+wxString wxControlBase::RemoveMarkup(const wxString& markup)
+{
+    return wxMarkupParser::Strip(markup);
+}
+
+bool wxControlBase::DoSetLabelMarkup(const wxString& markup)
+{
+    const wxString label = RemoveMarkup(markup);
+    if ( label.empty() && !markup.empty() )
+        return false;
+
+    SetLabel(label);
+
+    return true;
+}
+
 // ----------------------------------------------------------------------------
 // wxControlBase - ellipsization code
 // ----------------------------------------------------------------------------