1 (in-package :lisp-on-lines
)
3 (define-description T
()
5 :function
(lambda (object)
7 (substitute #\Space
#\-
11 (identity :label nil
:function
#'identity
)
12 (type :label
"Type" :function
#'type-of
)
13 (class :label
"Class" :function
#'class-of
)
14 (active-attributes :label
"Attributes"
18 (attribute-delimiter :label
"Attribute Delimiter"
22 (active-descriptions :label
"Active Descriptions"
26 (inactive-descriptions :label
"Inactive Descriptions"
30 (label-formatter :value
(lambda (label)
31 (generic-format *display
* "~A:" label
))
33 (value-formatter :value
(curry #'format nil
"~A")
36 (define-layered-method description-of
(any-lisp-object)
37 (find-description 't
))
39 (define-layered-function display-attribute
(attribute)
41 (display-using-description attribute
*display
* (attribute-object attribute
))))
43 (define-layered-function display-attribute-label
(attribute)
45 (funcall (attribute-label-formatter attribute
) (attribute-label attribute
))))
49 (define-layered-function display-attribute-value
(attribute)
51 (flet ((disp (val &rest args
)
52 (apply #'display
*display
* val
53 :activate
(attribute-active-descriptions attribute
)
54 :deactivate
(attribute-inactive-descriptions attribute
)
57 (let ((val (attribute-value attribute
)))
58 (if (eql val
(attribute-object attribute
))
59 (generic-format *display
* (funcall (attribute-value-formatter attribute
) val
))
60 (with-active-descriptions (inline)
61 (if (slot-boundp attribute
'active-attributes
)
62 (disp val
:attributes
(slot-value attribute
'active-attributes
))
65 (define-layered-method display-using-description
66 ((attribute standard-attribute
) display object
&rest args
)
67 (declare (ignore args
))
68 (when (attribute-label attribute
)
69 (display-attribute-label attribute
))
70 (display-attribute-value attribute
))
72 (define-display ((description t
))
73 (let ((attributes (attributes description
)))
74 (display-attribute (first attributes
))
75 (dolist (attribute (rest attributes
) (values))
76 (generic-format *display
*
78 (find-attribute description
'attribute-delimiter
)))
79 (display-attribute attribute
))))
82 (define-display :around
((description t
) (display null
) object
)
83 (with-output-to-string (*standard-output
*)
84 (call-next-layered-method description t object
))