A patch adding wxHTMLDataObject which can be used for handling the standard platform formats for transfering HTML formatted text.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71610 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/dataobj.h

@@ -334,6 +334,45 @@ private:
     #endif
 #endif // wxUSE_UNICODE
 
+class WXDLLIMPEXP_CORE wxHTMLDataObject : public wxDataObjectSimple
+{
+public:
+    // ctor: you can specify the text here or in SetText(), or override
+    // GetText()
+    wxHTMLDataObject(const wxString& html = wxEmptyString)
+        : wxDataObjectSimple(wxDF_HTML),
+          m_html(html)
+        {
+        }
+
+    // virtual functions which you may override if you want to provide text on
+    // demand only - otherwise, the trivial default versions will be used
+    virtual size_t GetLength() const { return m_html.Len() + 1; }
+    virtual wxString GetHTML() const { return m_html; }
+    virtual void SetHTML(const wxString& html) { m_html = html; }
+    
+    virtual size_t GetDataSize() const;
+    virtual bool GetDataHere(void *buf) const;
+    virtual bool SetData(size_t len, const void *buf);
+    
+    // Must provide overloads to avoid hiding them (and warnings about it)
+    virtual size_t GetDataSize(const wxDataFormat&) const
+    {
+        return GetDataSize();
+    }
+    virtual bool GetDataHere(const wxDataFormat&, void *buf) const
+    {
+        return GetDataHere(buf);
+    }
+    virtual bool SetData(const wxDataFormat&, size_t len, const void *buf)
+    {
+        return SetData(len, buf);
+    }
+
+private:
+    wxString m_html;
+};
+
 class WXDLLIMPEXP_CORE wxTextDataObject : public wxDataObjectSimple
 {
 public: