| 1 | (in-package :lisp-on-lines) |
| 2 | |
| 3 | (define-layered-class direct-attribute-definition-class |
| 4 | (special-layered-direct-slot-definition contextl::singleton-direct-slot-definition) |
| 5 | ((attribute-properties :accessor direct-attribute-properties |
| 6 | :documentation "This is an plist to hold the values of the attribute's properties as described by this direct attrbiute definition."))) |
| 7 | |
| 8 | (defmethod initialize-instance :after ((attribute direct-attribute-definition-class) &rest initargs) |
| 9 | (setf (direct-attribute-properties attribute) initargs)) |
| 10 | |
| 11 | (define-layered-class effective-attribute-definition-class (special-layered-effective-slot-definition) |
| 12 | ((direct-attributes :accessor attribute-direct-attributes) |
| 13 | (attribute-object :accessor attribute-object |
| 14 | :documentation "") |
| 15 | (attribute-object-initargs :accessor attribute-object-initargs))) |
| 16 | |
| 17 | |
| 18 | (define-layered-function attribute-value (object attribute)) |
| 19 | |
| 20 | (define-layered-method attribute-value (object attribute) |
| 21 | |
| 22 | (let ((fn (handler-case (attribute-function attribute) |
| 23 | (unbound-slot () nil)))) |
| 24 | (if fn |
| 25 | (funcall fn object) |
| 26 | (%attribute-value attribute)))) |
| 27 | |
| 28 | (defmethod attribute-description (attribute) |
| 29 | ;(break "description for ~A is (slot-value attribute 'description-name)") |
| 30 | (find-layer (slot-value attribute 'description-class)) |
| 31 | #+nil (let ((name (slot-value attribute 'description-name))) |
| 32 | (when name |
| 33 | (find-description name)))) |
| 34 | |
| 35 | |
| 36 | (define-layered-class standard-attribute () |
| 37 | |
| 38 | ((effective-attribute-definition :initarg effective-attribute |
| 39 | :accessor attribute-effective-attribute-definition) |
| 40 | (description-name) |
| 41 | (description-class :initarg description-class) |
| 42 | (initfunctions :initform nil) |
| 43 | (attribute-class :accessor attribute-class |
| 44 | :initarg :attribute-class |
| 45 | :initform 'standard-attribute) |
| 46 | (name :layered-accessor attribute-name |
| 47 | :initarg :name) |
| 48 | (label :layered-accessor attribute-label |
| 49 | :initarg :label |
| 50 | :initform nil |
| 51 | :layered t |
| 52 | ;:special t |
| 53 | ) |
| 54 | (function |
| 55 | :initarg :function |
| 56 | :layered-accessor attribute-function |
| 57 | :layered t) |
| 58 | (value :layered-accessor %attribute-value |
| 59 | :initarg :value |
| 60 | :layered t))) |
| 61 | |
| 62 | |
| 63 | |
| 64 | (defmethod print-object ((object standard-attribute) stream) |
| 65 | (print-unreadable-object (object stream :type nil :identity t) |
| 66 | (format stream "ATTRIBUTE ~A" (or (ignore-errors (attribute-name object)) "+unnamed-attribute+")))) |
| 67 | |
| 68 | (defvar *bypass-property-layered-function* nil) |
| 69 | |
| 70 | (define-layered-function property-layered-function (description attribute-name property-name) |
| 71 | (:method (description attribute-name property-name) |
| 72 | ;(dprint "First Time PLFunction for ~A ~A ~A" description attribute-name property-name) |
| 73 | (ensure-layered-function |
| 74 | (defining-description (intern (format nil "~A-~A-~A" |
| 75 | (description-print-name description) |
| 76 | attribute-name |
| 77 | property-name))) |
| 78 | |
| 79 | :lambda-list '(description)))) |
| 80 | |
| 81 | (define-layered-method (setf slot-value-using-layer) |
| 82 | :in-layer (context t) |
| 83 | (new-value class (attribute standard-attribute) property writer) |
| 84 | |
| 85 | (when (or *bypass-property-layered-function* |
| 86 | (not (slot-definition-layeredp property))) |
| 87 | (return-from slot-value-using-layer (call-next-method))) |
| 88 | |
| 89 | |
| 90 | ;;FIXME: this is wrong for so many reasons. |
| 91 | (let ((layer |
| 92 | (find-layer (first (remove nil (closer-mop::class-precedence-list (class-of context)) |
| 93 | :key #'class-name))))) |
| 94 | |
| 95 | |
| 96 | (flet ((do-set-slot() |
| 97 | |
| 98 | (let ((fn |
| 99 | (let ((*bypass-property-layered-function* t)) |
| 100 | (if (slot-boundp-using-class class attribute property) |
| 101 | (slot-value-using-class class attribute property) |
| 102 | (setf (slot-value-using-class class attribute property) |
| 103 | (property-layered-function |
| 104 | (attribute-description attribute) |
| 105 | (attribute-name attribute) |
| 106 | (closer-mop:slot-definition-name property))))))) |
| 107 | ;(dprint "We are setting the fn ~A " fn) |
| 108 | (when (not (generic-function-methods fn)) |
| 109 | ; (dprint "... there are no methods on it ever") |
| 110 | ;; * This slot has never been set before. |
| 111 | ;; create a method on property-layered-function |
| 112 | ;; so subclasses can see this new property. |
| 113 | (ensure-layered-method |
| 114 | (layered-function-definer 'property-layered-function) |
| 115 | `(lambda (description attribute property) |
| 116 | (declare (ignore description attribute property)) |
| 117 | ,fn) |
| 118 | :in-layer layer |
| 119 | :specializers |
| 120 | (list (class-of |
| 121 | (attribute-description attribute)) |
| 122 | (closer-mop:intern-eql-specializer |
| 123 | (attribute-name attribute)) |
| 124 | (closer-mop:intern-eql-specializer |
| 125 | (closer-mop:slot-definition-name property))))) |
| 126 | |
| 127 | |
| 128 | ;; finally, specialize this property to this description. |
| 129 | (ensure-layered-method |
| 130 | fn |
| 131 | `(lambda (description) |
| 132 | ,new-value) |
| 133 | :in-layer layer |
| 134 | :specializers (list (class-of (attribute-description attribute) |
| 135 | )))))) |
| 136 | |
| 137 | (if (slot-boundp attribute 'description-class) |
| 138 | (do-set-slot) |
| 139 | (push (lambda () (do-set-slot)) |
| 140 | (slot-value attribute 'initfunctions)))))) |
| 141 | |
| 142 | |
| 143 | (define-layered-method slot-value-using-layer |
| 144 | :in-layer (layer t) |
| 145 | :around (class (attribute standard-attribute) property reader) |
| 146 | ;(dprint "Getting the slot value of ~A" property) |
| 147 | |
| 148 | (when (not (slot-boundp-using-class class attribute property)) |
| 149 | ;; If the slot is unbound, we search for its layered-function |
| 150 | |
| 151 | (let ((fn (property-layered-function |
| 152 | (attribute-description attribute) |
| 153 | |
| 154 | (attribute-name attribute) |
| 155 | (closer-mop:slot-definition-name property)))) |
| 156 | (dprint ".. not bound yet, have function ~A" fn) |
| 157 | (if (generic-function-methods fn) |
| 158 | (let ((*bypass-property-layered-function* t)) |
| 159 | ; (dprint " This shit has been bound!. We gona set the _real_ slot to the generic function like.") |
| 160 | (setf (slot-value-using-class class attribute property) fn)) |
| 161 | (progn |
| 162 | ;(dprint "This shit aint never been bound nowhere! checking for initfunction...") |
| 163 | (when (slot-definition-initfunction property) |
| 164 | ;(dprint "At least we have an initfunction. sweeet") |
| 165 | (let ((*bypass-property-layered-function* nil)) |
| 166 | (setf (slot-value attribute (slot-definition-name property)) |
| 167 | (funcall (slot-definition-initfunction property))))))))) |
| 168 | |
| 169 | ;(dprint "If we're here, the slot should be bound") |
| 170 | |
| 171 | |
| 172 | (if (and |
| 173 | (contextl::slot-definition-layeredp property) |
| 174 | (not *bypass-property-layered-function*)) |
| 175 | (let ((fn (call-next-method))) |
| 176 | ;(dprint "... using fn ~A to get value" fn) |
| 177 | (funcall fn layer (attribute-description attribute))) |
| 178 | (call-next-method))) |
| 179 | |
| 180 | |
| 181 | |
| 182 | |
| 183 | (defun slot-boundp-using-property-layered-function (class attribute property) |
| 184 | (when (not |
| 185 | (let ((*bypass-property-layered-function* t)) |
| 186 | (slot-boundp-using-class class attribute property))) |
| 187 | ;; If the slot is unbound, we search for its layered-function |
| 188 | |
| 189 | (let ((fn (property-layered-function |
| 190 | (attribute-description attribute) |
| 191 | |
| 192 | (attribute-name attribute) |
| 193 | (closer-mop:slot-definition-name property)))) |
| 194 | (if (generic-function-methods fn) |
| 195 | (let ((*bypass-property-layered-function* t)) |
| 196 | (setf (slot-value-using-class class attribute property) fn)) |
| 197 | NIL)))) |
| 198 | |
| 199 | #+nil(define-layered-method slot-boundp-using-layer |
| 200 | :in-layer (layer t) |
| 201 | :around (class (attribute standard-attribute) property reader) |
| 202 | (if *bypass-property-layered-function* |
| 203 | (call-next-method) |
| 204 | (slot-boundp-using-property-layered-function class attribute property))) |
| 205 | |
| 206 | (defun attribute-value* (attribute) |
| 207 | (attribute-value *object* attribute)) |
| 208 | |
| 209 | (defmacro with-attributes (names description &body body) |
| 210 | `(with-slots ,names ,description ,@body)) |
| 211 | |
| 212 | (defun display-attribute (attribute) |
| 213 | (display-using-description attribute *display* *object*)) |
| 214 | |
| 215 | (define-layered-method display-using-description |
| 216 | ((attribute standard-attribute) display object &rest args) |
| 217 | (declare (ignore args)) |
| 218 | (when (attribute-label attribute) |
| 219 | (format display "~A " (attribute-label attribute))) |
| 220 | (format display "~A" (attribute-value object attribute))) |
| 221 | |
| 222 | |
| 223 | |
| 224 | |
| 225 | |
| 226 | |
| 227 | |
| 228 | |
| 229 | |
| 230 | |
| 231 | |