-/// Count the number of words in the text between these two iterators
-int countWords(DocIterator const & from, DocIterator const & to);
-
-/// Count the number of chars in the text between these two iterators
-int countChars(DocIterator const & from, DocIterator const & to, bool with_blanks);
+/// Load the file with name \c fname, and returns the buffer. If the
+/// file was already loaded it just returns the associated buffer.
+Buffer * loadIfNeeded(support::FileName const & fname);