anchor.diff:                                  ;; for presentation-to-command-translators,
                                   ;; which are searched for in
                                   ;; (frame-command-table *application-frame*)
  -                                (redisplay-frame-pane ,frame (frame-standard-input ,frame) :force-p t)
  +                                (redisplay-frame-pane ,frame (frame-standard-input ,frame))
                                   (setf (frame-command-table ,frame) command-table)
                                   (process-gestures-or-command ,frame))
                               (unbound-gesture-sequence (c)
  
positive.code: current message was set."))
    (:default-initargs
     :scroll-bars nil
      :display-function 'display-minibuffer
      :display-time :no-clear
      :incremental-redisplay t))
  
  (defmethod stream-accept :before ((pane minibuffer-pane) type &rest args)
    (declare (ignore type args))
    (window-clear pane)
    (when (message pane)
      (setf (message pane) nil)
      ;; FIXME: If we do not redisplay here, the area occupied by the
      ;; message will be blanked with a white rectangle at the first
      ;; keystroke.
      (redisplay-frame-pane (pane-frame pane) pane)))
  
  (defmethod stream-accept :around ((pane minibuffer-pane) type &rest args)
    (declare (ignore args))
    ;; FIXME: this isn't the friendliest way of indicating a parse
    ;; error: there's no feedback, unlike emacs' quite nice "[no
    ;; match]".
    (loop
     (handler-case
         (with-input-focus (pane)
           (return (call-next-method)))
       (parse-error () nil))))
  
  (defmethod stream-accept ((pane minibuffer-pane) type &rest args
                            &key (view (stream-default-view pane))
  
negative.code:   (apply #'prompt-for-accept pane type view args)
    ;; but we need to turn some of ACCEPT-1 off.
    (apply #'accept-1-for-minibuffer pane type args))
  
  (defmethod compose-space ((pane minibuffer-pane) &key width height)
    (declare (ignore width height))
    (with-sheet-medium (medium pane)
      (let* ((sr (call-next-method))
             (height (max (text-style-height (medium-merged-text-style medium)
                                             medium)
                          (if (message pane)
                              (bounding-rectangle-height (message pane))
                              0))))
        (make-space-requirement
         :height height :min-height height :max-height height
         :width (space-requirement-width sr)
         :min-width (space-requirement-min-width sr)
         :max-width (space-requirement-max-width sr)))))
  
  ;;; simpler version of McCLIM's internal operators of the same names:
  ;;; HANDLE-EMPTY-INPUT to make default processing work, EMPTY-INPUT-P
  