This function registers GTK+’s internal rich text serialization format with the passed this.
The internal format does not comply to any standard rich text format and only works between TextBuffer instances. It is capable of serializing all of a text buffer’s tags and embedded pixbufs.
This function is just a wrapper around
register_serialize_format. The mime type used for registering is “application/x-gtk-text-buffer-rich-text”, or
tagset_name” if a
tagset_name was passed.
tagset_name can be used to restrict the transfer of rich text to buffers with compatible sets of tags, in order to avoid
unknown tags from being pasted. It is probably the common case to pass an identifier != null here, since the
null tagset requires the receiving buffer to deal with with pasting of arbitrary tags.
an optional tagset name, on null
the Atom that corresponds to the newly registered format’s mime-type.