+(defun string-elide (str maxlen position)
+ (declare (fixnum maxlen))
+ (let ((len (length str)))
+ (declare (fixnum len))
+ (cond
+ ((<= len maxlen)
+ str)
+ ((<= maxlen 3)
+ "...")
+ ((eq position :middle)
+ (multiple-value-bind (mid remain) (truncate maxlen 2)
+ (let ((end1 (- mid 1))
+ (start2 (- len (- mid 2) remain)))
+ (concatenate 'string (subseq str 0 end1) "..." (subseq str start2)))))
+ ((or (eq position :end) t)
+ (concatenate 'string (subseq str 0 (- maxlen 3)) "...")))))