(unbound-slot ()
(or
*init-time-description*
-q (call-next-method)))))
+ (call-next-method)))))
(define-layered-class attribute ()
((description :initarg :description
(attribute-class
:accessor attribute-class
:initarg :attribute-class
- :initform 'standard-attribute
- :layered t)
+ :initform 'standard-attribute)
(keyword
:layered-accessor attribute-keyword
:initarg :keyword
:special t)))
-
-
(define-layered-class standard-attribute (attribute)
((label
:layered-accessor attribute-label
:initform nil
:layered t
:special t)
+ (label-formatter
+ :layered-accessor attribute-label-formatter
+ :initarg :label-formatter
+ :initform nil
+ :layered t
+ :special t)
(function
:initarg :function
:layered-accessor attribute-function
:layered t
:special t)
- (value
- :layered-accessor attribute-value
- :initarg :value
- :layered t
- :special t)
+ (value
+ :layered-accessor attribute-value
+ :initarg :value
+ :layered t
+ :special t)
+ (value-formatter
+ :layered-accessor attribute-value-formatter
+ :initarg :value-formatter
+ :initform nil
+ :layered t
+ :special t)
(activep
:layered-accessor attribute-active-p
:initarg :activep ;depreciated
:layered t
:special t
:documentation
- "Can be T, NIL or :WHEN. In the latter case, attribute is only active if the attribute value is non-null.")))
+ "Can be T, NIL or :WHEN. In the latter case, attribute is only active if the attribute value is non-null.")
+ (active-attributes :layered-accessor attribute-active-attributes
+ :initarg :attributes
+ :layered t
+ :special t)
+ (active-descriptions :layered-accessor attribute-active-descriptions
+ :initarg :activate
+ :initform nil
+ :layered t
+ :special t)
+ (inactive-descriptions :layered-accessor attribute-inactive-descriptions
+ :initarg :deactivate
+ :initform nil
+ :layered t
+ :special t)))
+
+(define-layered-method attribute-label-formatter :around (attribute)
+ (or (slot-value attribute 'label-formatter)
+ (attribute-value (find-attribute (attribute-description attribute) 'label-formatter))
+ (error "No Formatter .. fool!")))
+
+(define-layered-method attribute-value-formatter :around (attribute)
+
+ (or (slot-value attribute 'value-formatter)
+ (attribute-value (find-attribute (attribute-description attribute) 'value-formatter))
+ (error "No Formatter .. fool!")))
+
(define-layered-method attribute-object ((attribute standard-attribute))
(described-object (attribute-description attribute))))
+(define-layered-function attribute-value-using-object (object attribute))
+(define-layered-function (setf attribute-value-using-object) (value object attribute))
+
(define-layered-method attribute-value ((attribute standard-attribute))
(attribute-value-using-object (attribute-object attribute) attribute))
-
-(define-layered-function attribute-value-using-object (object attribute))
(define-layered-method attribute-value-using-object (object attribute)
(let ((fn (handler-case (attribute-function attribute)
(funcall fn object)
(slot-value attribute 'value))))
+(define-layered-method (setf attribute-value) (value (attribute standard-attribute))
+ (setf (attribute-value-using-object (attribute-object attribute) attribute) value))
+
+(define-layered-method (setf attribute-value-using-object) (value object attribute)
+ (error "No (SETF ATTRIBUTE-VALUE-USING-OBJECT) for ~A ~A and we are not editable"
+ object attribute))
+
+
(defun ensure-access-function (class attribute property)
(with-function-access
(if (slot-definition-specialp property)
(:method ((attribute standard-attribute) initarg)
nil)
(:method ((attribute standard-attribute) (initarg (eql :function)))
+ t)
+ (:method ((attribute standard-attribute) (initarg (eql :value)))
t))
(defun prepare-initargs (att args)
(attribute-value *object* attribute))
(defmacro with-attributes (names description &body body)
- `(with-slots ,names ,description ,@body))
+ `(let ,(loop for name in names collect
+ (list name `(find-attribute ,description ',name)))
+ ,@body))q