(in-package :lisp-on-lines)
+(defstruct unbound-slot-value (s))
+
+(defvar +unbound-slot+ (make-unbound-slot-value))
+
+(defmethod print-object ((object unbound-slot-value) stream)
+ (print-unreadable-object (object stream)
+ (format stream "UNBOUND")))
+
(define-description standard-object ()
- ((class-slots :label "Slots"
+ ((editp :value t)
+ (class-slots :label "Slots"
:function (compose 'class-slots 'class-of))))
-(define-layered-method description-of ((object standard-object))
- (find-description 'standard-object))
+(define-layered-class slot-definition-attribute (standard-attribute)
+ ((slot-name :initarg :slot-name
+ :accessor attribute-slot-name
+ :layered t)))
+
+
+(define-layered-method attribute-active-p :around ((attribute slot-definition-attribute))
+ (let ((active? (slot-value attribute 'activep)))
+ (if (and (eq :when active?)
+ (unbound-slot-value-p (attribute-value attribute)))
+ NIL
+
+ (call-next-method))))
+
+(define-layered-method attribute-active-p
+ :in-layer #.(defining-description 'editable)
+ :around ((attribute slot-definition-attribute))
+ (let ((active? (slot-value attribute 'activep)))
+ (if (and (eq :when active?)
+ (unbound-slot-value-p (attribute-value attribute)))
+ t
+ (call-next-method))))
+(defmethod shared-initialize :around ((object slot-definition-attribute)
+ slots &rest args)
+ (prog1 (call-next-method)
+ (unless (attribute-setter object)
+ (setf (attribute-setter object)
+ (lambda (v o)
+ (setf (slot-value o (attribute-slot-name object)) v))))))
+
+(define-layered-method attribute-value-using-object (object (attribute slot-definition-attribute))
+ (if (slot-boundp object (attribute-slot-name attribute))
+ (slot-value object (attribute-slot-name attribute))
+ +unbound-slot+))
+
+(defun attribute-slot-makunbound (attribute)
+ (slot-makunbound (attribute-object attribute) (attribute-slot-name attribute)))
+
+(defun ensure-description-for-class (class &key attributes (name (intern (format nil "DESCRIPTION-FOR-~A" (class-name class))))
+ direct-superclasses direct-slot-specs)
+
+ (let* ((super-descriptions
+ (mapcar #'class-of
+ (delete nil (mapcar (rcurry #'find-description nil)
+ (mapcar #'class-name direct-superclasses)))))
+ (desc-class
+ (ensure-class (defining-description name)
+ :direct-superclasses (or super-descriptions (list (class-of (find-description 'standard-object))))
+ :direct-slots
+ (loop
+ :for slot in (class-slots class)
+ :collect
+ (let ((direct-spec
+ (find (slot-definition-name slot)
+ direct-slot-specs
+ :key (rcurry 'getf :name))))
+ (if direct-spec
+ (append (alexandria:remove-from-plist direct-spec
+ :initfunction
+ :initform
+ :initargs
+ :readers
+ :writers)
+ (unless
+ (getf direct-spec :attribute-class)
+ (list :attribute-class 'slot-definition-attribute))
+ (unless
+ (getf direct-spec :label)
+ (list :label (format nil
+ "~@(~A~)" (substitute #\Space #\- (symbol-name (slot-definition-name slot))))))
+ (list :slot-name (slot-definition-name slot)))
+ `(:name ,(slot-definition-name slot)
+ :attribute-class slot-definition-attribute
+ :slot-name ,(slot-definition-name slot)
+ :label ,(format nil
+ "~@(~A~)" (substitute #\Space #\- (symbol-name (slot-definition-name slot)))))))
+ :into slots
+ :collect (slot-definition-name slot) :into names
+ :finally (return (cons `(:name active-attributes
+ :value ',(or attributes names))
+ slots)))
+ :metaclass 'standard-description-class)))
+ (unless (ignore-errors (find-description (class-name class)))
+ (ensure-class (defining-description (class-name class))
+ :direct-superclasses (list desc-class)
+ :metaclass 'standard-description-class))
+ (find-description name)))
+
+
+(defclass described-class ()
+ ((direct-slot-specs :accessor class-direct-slot-specs)
+ (attributes :initarg :attributes :initform nil)))
+
+(defmethod ensure-class-using-class :around ((class described-class) name &rest args)
+ (call-next-method))
+
+(defmethod direct-slot-definition-class ((class described-class) &rest initargs)
+ (let ((slot-class (call-next-method)))
+ (make-instance (class-of slot-class) :direct-superclasses (list slot-class (find-class 'described-class-direct-slot-definition)))))
+
+(defclass described-class-direct-slot-definition ()
+ ())
+
+(defmethod shared-initialize :around ((class described-class-direct-slot-definition) slot-names &key &allow-other-keys)
+ (call-next-method))
+
+(defmethod validate-superclass
+ ((class described-class)
+ (superclass standard-class))
+ t)
+
+(defmethod initialize-instance :after ((class described-class) &rest initargs &key (direct-superclasses '()) direct-slots)
+ (declare (dynamic-extent initargs))
+ (finalize-inheritance class)
+ (ensure-description-for-class class :direct-slot-specs direct-slots
+ :direct-superclasses direct-superclasses
+ :attributes (slot-value class 'attributes)))
+
+(defmethod reinitialize-instance :after ((class described-class) &rest initargs &key (direct-superclasses '()) direct-slots)
+ (declare (dynamic-extent initargs))
+ (finalize-inheritance class)
+ (ensure-description-for-class class :direct-slot-specs direct-slots
+ :direct-superclasses direct-superclasses
+ :attributes (slot-value class 'attributes)))
+
+(defclass described-standard-class (described-class standard-class ) ())
+
+(defmethod validate-superclass
+ ((class described-standard-class)
+ (superclass standard-class))
+ t)
+
+(define-layered-method description-of ((object standard-object))
+ (or (ignore-errors (find-description (class-name (class-of object))))
+ (find-description 'standard-object)))
+
+
HCoop / clinton / lisp-on-lines.git / blobdiff