Support some CSS styles for the links in wxHTML too.

Refactor limited CSS styles support for <span> tag to reuse it for <a> tag as
well.

Closes #14599.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72630 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/html/winpars.h

@@ -259,6 +259,8 @@ private:
 //                  the wxHtmlWinParser object
 //-----------------------------------------------------------------------------
 
+class WXDLLIMPEXP_HTML wxHtmlStyleParams;
+
 class WXDLLIMPEXP_HTML wxHtmlWinTagHandler : public wxHtmlTagHandler
 {
     DECLARE_ABSTRACT_CLASS(wxHtmlWinTagHandler)
@@ -271,6 +273,8 @@ public:
 protected:
     wxHtmlWinParser *m_WParser; // same as m_Parser, but overcasted
 
+    void ApplyStyle(const wxHtmlStyleParams &styleParams);
+
     wxDECLARE_NO_COPY_CLASS(wxHtmlWinTagHandler);
 };