Gets the contents of the selection data as a UTF-8 string.
Return: if the selection data contained a
recognized text type and it could be converted to UTF-8, a newly
allocated string containing the converted text, otherwise %NULL.
If the result is non-%NULL it must be freed with g_free().
Gets the contents of the selection data as a UTF-8 string.
Return: if the selection data contained a recognized text type and it could be converted to UTF-8, a newly allocated string containing the converted text, otherwise %NULL. If the result is non-%NULL it must be freed with g_free().