-(in-package :lisp-on-lines)
-
-
-(define-layered-class attribute ()
- ())
-
-(defgeneric eval-attribute-initarg (attribute initarg)
- (:method (a i)
- nil))
-
-(defmethod eval-attribute-initarg (attribute (initarg (eql :function)))
- t)
-(define-layered-function attribute-value (object attribute))
-
-
-
-(deflayer LISP-ON-LINES)
-(ensure-active-layer 'lisp-on-lines)
-
-(defvar *standard-direct-slot-initarg-symbols*
- '(:layered :class :in-layer :name :readers :writers :initargs :allow-other-keys :special))
-
-(define-layered-function special-slot-values (description slot-name)
- (:method-combination append))
-
-(define-layered-class attribute-special-layered-direct-slot-definition
- (attribute contextl::special-layered-direct-slot-definition)
- (initargs))
-
-(defmethod shared-initialize :around ((instance attribute-special-layered-direct-slot-definition) slots &rest initargs )
- (setf (slot-value instance 'initargs)
- (apply #'arnesi:remove-keywords initargs *standard-direct-slot-initarg-symbols*))
- (call-next-method))
-
-(define-layered-class standard-attribute
- (attribute contextl::layered-effective-slot-definition-in-layers)
- ((direct-slots)
- (description
- :layered-accessor description-of)
- (label
- :initarg :label
- :layered-accessor attribute-label
- :layered t
- :initform nil)
- (function
- :initarg :function
- :layered-accessor attribute-function
- :layered t)
- (value
- :initarg :value
- :layered t)))
-
-(define-layered-method attribute-value (object attribute)
- (funcall (attribute-function attribute) object))
-
-
-
-(defmethod shared-initialize :around ((attribute standard-attribute) slots &rest initargs)
- (declare (ignore initargs))
- (setf (attribute-function attribute)
- (lambda (object)
- (slot-value attribute 'value)))
- (call-next-method))
-
-(defun attribute-name (attribute)
- (closer-mop:slot-definition-name attribute))
-
-(define-layered-method slot-value-using-layer
-; :in-layer lisp-on-lines
- :around (class (attribute standard-attribute) slot reader)
- (loop for (key var) on (special-slot-values (slot-value attribute 'description)
- (attribute-name attribute))
- :if (eq (closer-mop:slot-definition-name slot) key)
- :do (return-from slot-value-using-layer var))
- (call-next-method))
-
-(define-layered-method display-using-description
- ((attribute standard-attribute) display object &rest args)
- (declare (ignore args))
- (format display "~@[~A ~]~A" (attribute-label attribute)
- (attribute-value object attribute)))
-
-
-
-
-
-
-
-
-
+(in-package :lisp-on-lines)
+
+(define-layered-class direct-attribute-definition-class
+ (special-layered-direct-slot-definition contextl::singleton-direct-slot-definition)
+ ((attribute-properties :accessor direct-attribute-properties
+ :documentation "This is an plist to hold the values of the attribute's properties as described by this direct attrbiute definition.")))
+
+(defmethod initialize-instance :after ((attribute direct-attribute-definition-class) &rest initargs)
+ (setf (direct-attribute-properties attribute) initargs))
+
+(define-layered-class effective-attribute-definition-class (special-layered-effective-slot-definition)
+ ((direct-attributes :accessor attribute-direct-attributes)
+ (attribute-object :accessor attribute-object
+ :documentation "")
+ (attribute-object-initargs :accessor attribute-object-initargs)))
+
+
+(define-layered-function attribute-value (object attribute))
+
+(define-layered-method attribute-value (object attribute)
+
+ (let ((fn (handler-case (attribute-function attribute)
+ (unbound-slot () nil))))
+ (if fn
+ (funcall fn object)
+ (%attribute-value attribute))))
+
+(defmethod attribute-description (attribute)
+ ;(break "description for ~A is (slot-value attribute 'description-name)")
+ (find-layer (slot-value attribute 'description-class))
+#+nil (let ((name (slot-value attribute 'description-name)))
+ (when name
+ (find-description name))))
+
+
+(define-layered-class standard-attribute ()
+
+ ((effective-attribute-definition :initarg effective-attribute
+ :accessor attribute-effective-attribute-definition)
+ (description-name)
+ (description-class :initarg description-class)
+ (initfunctions :initform nil)
+ (attribute-class :accessor attribute-class
+ :initarg :attribute-class
+ :initform 'standard-attribute
+ :layered t)
+ (name :layered-accessor attribute-name
+ :initarg :name)
+ (label :layered-accessor attribute-label
+ :initarg :label
+ :initform nil
+ :layered t
+ ;:special t
+ )
+ (function
+ :initarg :function
+ :layered-accessor attribute-function
+ :layered t)
+ (value :layered-accessor %attribute-value
+ :initarg :value
+ :layered t)))
+
+
+
+(defmethod print-object ((object standard-attribute) stream)
+ (print-unreadable-object (object stream :type nil :identity t)
+ (format stream "ATTRIBUTE ~A" (or (ignore-errors (attribute-name object)) "+unnamed-attribute+"))))
+
+(defgeneric eval-property-initarg (att initarg)
+ (:method ((attribute standard-attribute) initarg)
+ nil)
+ (:method ((attribute standard-attribute) (initarg (eql :function)))
+ t))
+
+(defun prepare-initargs (att args)
+ (loop
+ :for (key arg)
+ :on args :by #'cddr
+ :nconc (list key
+ (if (eval-property-initarg att key)
+ (eval arg)
+ arg))))
+
+(defvar *bypass-property-layered-function* nil)
+
+(define-layered-function property-layered-function (description attribute-name property-name)
+ (:method (description attribute-name property-name)
+ ;(dprint "First Time PLFunction for ~A ~A ~A" description attribute-name property-name)
+ (ensure-layered-function
+ (defining-description (intern (format nil "~A-~A-~A"
+ (description-print-name description)
+ attribute-name
+ property-name)))
+
+ :lambda-list '(description))))
+
+(define-layered-method (setf slot-value-using-layer)
+ :in-layer (context t)
+ (new-value class (attribute standard-attribute) property writer)
+
+ (when (or *bypass-property-layered-function*)
+ (return-from slot-value-using-layer (call-next-method)))
+
+
+ ;;FIXME: this is wrong for so many reasons.
+ (let ((layer
+ (find-layer (first (remove nil (closer-mop::class-precedence-list (class-of context))
+ :key #'class-name)))))
+
+
+ (flet ((do-set-slot()
+
+ (let ((fn
+ (let ((*bypass-property-layered-function* t))
+ (if (slot-boundp-using-class class attribute property)
+ (slot-value-using-class class attribute property)
+ (setf (slot-value-using-class class attribute property)
+ (property-layered-function
+ (attribute-description attribute)
+ (attribute-name attribute)
+ (closer-mop:slot-definition-name property)))))))
+ ;(dprint "We are setting the fn ~A " fn)
+ (when (not (generic-function-methods fn))
+ ; (dprint "... there are no methods on it ever")
+ ;; * This slot has never been set before.
+ ;; create a method on property-layered-function
+ ;; so subclasses can see this new property.
+ (ensure-layered-method
+ (layered-function-definer 'property-layered-function)
+ `(lambda (description attribute property)
+ (declare (ignore description attribute property))
+ ,fn)
+ :in-layer layer
+ :specializers
+ (list (class-of
+ (attribute-description attribute))
+ (closer-mop:intern-eql-specializer
+ (attribute-name attribute))
+ (closer-mop:intern-eql-specializer
+ (closer-mop:slot-definition-name property)))))
+
+
+ ;; finally, specialize this property to this description.
+ (ensure-layered-method
+ fn
+ `(lambda (description)
+ (funcall ,(lambda()
+ new-value)))
+ :in-layer layer
+ :specializers (list (class-of (attribute-description attribute)
+ ))))))
+
+ (if (slot-boundp attribute 'description-class)
+ (do-set-slot)
+ (error "serrint wif no desc WTF!")))))
+
+
+(define-layered-method slot-value-using-layer
+ :in-layer (layer t)
+ :around (class (attribute standard-attribute) property reader)
+
+ ;; (dprint "Getting the slot value of ~A" property)
+
+ ;; We do some magic in here and i thought it
+ ;; would be called magically in call-next-method.
+ ;; This explicit call is good enough for now.
+
+ (unless (slot-boundp-using-class class attribute property)
+ (slot-unbound class attribute (slot-definition-name property)))
+
+ (let ((val (call-next-method)))
+
+ (if (and
+ ;; Not special access
+ (not (symbolp val))
+ (contextl::slot-definition-layeredp property)
+ (not *bypass-property-layered-function*))
+ (let ((fn val))
+ ;(dprint "... using fn ~A to get value" fn)
+ (funcall fn layer (attribute-description attribute)))
+ val)))
+
+(defmacro define-bypass-function (name function-name)
+ `(defun ,name (&rest args)
+ (let ((*bypass-property-layered-function* t))
+ (apply (function ,function-name) args))))
+
+(define-bypass-function real-slot-boundp-using-class slot-boundp-using-class)
+(define-bypass-function real-slot-value-using-class slot-value-using-class)
+(define-bypass-function (setf real-slot-value-using-class) (setf slot-value-using-class))
+
+(defun slot-boundp-using-property-layered-function (class attribute property)
+ ;(dprint "plf boundp:")
+ (let* ((really-bound-p
+ (real-slot-boundp-using-class class attribute property))
+ (fn (if really-bound-p
+ (real-slot-value-using-class class attribute property)
+ (setf (real-slot-value-using-class class attribute property)
+ (property-layered-function
+ (attribute-description attribute)
+ (attribute-name attribute)
+ (closer-mop:slot-definition-name property))))))
+
+ (if (symbolp fn)
+ ;;special symbol access in process
+ T
+ (if (generic-function-methods fn)
+ T
+ NIL))))
+
+(define-layered-method slot-boundp-using-layer
+ :in-layer (layer t)
+ :around (class (attribute standard-attribute) property reader)
+ (if *bypass-property-layered-function*
+ (call-next-method)
+ (slot-boundp-using-property-layered-function class attribute property)))
+
+(defun attribute-value* (attribute)
+ (attribute-value *object* attribute))
+
+(defmacro with-attributes (names description &body body)
+ `(with-slots ,names ,description ,@body))
+
+(defun display-attribute (attribute)
+ (display-using-description attribute *display* *object*))
+
+(define-layered-method display-using-description
+ ((attribute standard-attribute) display object &rest args)
+ (declare (ignore args))
+ (when (attribute-label attribute)
+ (format display "~A " (attribute-label attribute)))
+ (format display "~A" (attribute-value object attribute)))
+
+
+
+
+
+
+
+
+
+
+
HCoop / clinton / lisp-on-lines.git / blobdiff