4867c86f |
1 | (in-package :lisp-on-lines) |
2 | |
4358148e |
3 | ;;;; * DESCRIPTIONS |
4 | ;;;; A description is an object which is used |
5 | ;;;; to describe another object. |
6 | |
4358148e |
7 | |
8 | ;;; #+HACK |
9 | ;;; I'm having some 'issues' with |
10 | ;;; compiled code and my initialization. |
11 | ;;; So this hack initializes the world. |
12 | (eval-when (:compile-toplevel :load-toplevel :execute) |
13 | (defparameter *defined-descriptions* nil)) |
14 | |
4271ab0b |
15 | (define-layered-class description-access-class (standard-layer-class contextl::special-layered-access-class ) |
4358148e |
16 | ((defined-in-descriptions :initarg :in-description) |
1178c783 |
17 | (class-active-attributes-definition :initarg :attributes) |
4358148e |
18 | (mixin-class-p :initarg :mixinp))) |
19 | |
20 | (defmethod direct-slot-definition-class |
21 | ((class description-access-class) &key &allow-other-keys) |
22 | (find-class 'direct-attribute-definition-class)) |
23 | |
24 | (defmethod effective-slot-definition-class |
25 | ((class description-access-class) &key &allow-other-keys) |
26 | (find-class 'effective-attribute-definition-class)) |
27 | |
28 | (defmethod compute-effective-slot-definition |
29 | ((class description-access-class) name direct-slot-definitions) |
4867c86f |
30 | (declare (ignore name)) |
4358148e |
31 | (let ((attribute (call-next-method))) |
32 | (setf (attribute-direct-attributes attribute) direct-slot-definitions) |
f2ff8a16 |
33 | (setf (attribute-object-initargs attribute) |
34 | ;; This plist will be used to init the attribute object |
35 | ;; Once the description itself is properly initiated. |
36 | (list :name name |
e8d4fa45 |
37 | 'effective-attribute attribute)) |
4358148e |
38 | attribute)) |
e8d4fa45 |
39 | |
40 | (defmethod slot-value-using-class ((class description-access-class) object slotd) |
b7657b86 |
41 | (call-next-method) |
42 | #+nil (if (or |
e8d4fa45 |
43 | (eq (slot-definition-name slotd) 'described-object) |
44 | (not (slot-boundp slotd 'attribute-object))) |
45 | (call-next-method) |
46 | (slot-definition-attribute-object slotd))) |
4867c86f |
47 | |
4358148e |
48 | |
b7657b86 |
49 | (eval-when (:compile-toplevel :load-toplevel :execute) |
50 | (defparameter *description-attributes* (make-hash-table))) |
51 | |
52 | |
53 | |
4358148e |
54 | (defclass standard-description-class (description-access-class layered-class) |
b7657b86 |
55 | ((attributes :accessor description-class-attributes :initform (list))) |
4358148e |
56 | (:default-initargs :defining-metaclass 'description-access-class)) |
57 | |
b7657b86 |
58 | |
59 | |
4358148e |
60 | (defmethod validate-superclass |
61 | ((class standard-description-class) |
62 | (superclass standard-class)) |
63 | t) |
64 | |
e8d4fa45 |
65 | (define-layered-class standard-description-object (standard-layer-object) |
66 | ((described-object :accessor described-object |
67 | :special t))) |
4358148e |
68 | |
69 | (defun description-class-name (description-class) |
70 | (read-from-string (symbol-name (class-name description-class)))) |
b7657b86 |
71 | |
72 | (defgeneric standard-description-p (description-candidate) |
73 | (:method (not-description) |
74 | NIL) |
75 | (:method ((description standard-description-object)) |
76 | T)) |
b7657b86 |
77 | |
1178c783 |
78 | (defun compute-effective-attribute-objects (description) |
79 | (mapcar |
80 | (lambda (slot) |
81 | (or (find-attribute description |
82 | (slot-definition-name slot) nil) |
83 | (let* ((*init-time-description* description) |
84 | (attribute-class (or |
85 | (ignore-errors |
86 | (slot-value-using-class |
87 | (class-of description) description slot)) |
88 | 'standard-attribute)) |
89 | (attribute |
90 | (apply #'make-instance |
91 | attribute-class |
92 | :description description |
93 | :attribute-class attribute-class |
94 | (attribute-object-initargs slot)))) |
95 | (setf (slot-definition-attribute-object slot) attribute)))) |
96 | (remove 'described-object (class-slots (class-of description)) |
97 | :key #'slot-definition-name))) |
98 | |
f56d6e7e |
99 | (defmacro with-described-object ((object description &rest args) |
100 | &body body) |
101 | `(funcall-with-described-object |
102 | (lambda () ,@body) |
103 | ,object |
104 | ,description |
105 | ,@args)) |
106 | |
1178c783 |
107 | (defun initialize-effective-attribute-values-for-description-class (class description attribute-objects) |
b7657b86 |
108 | |
109 | (loop |
110 | :for (layer class) |
1178c783 |
111 | :on (partial-class-defining-classes class) :by #'cddr |
b7657b86 |
112 | :do (funcall-with-layer-context |
113 | (adjoin-layer (find-layer layer) (current-layer-context)) |
114 | (lambda () |
115 | (loop :for direct-slot :in (class-direct-slots class) |
116 | :do (let ((attribute |
117 | (find (slot-definition-name direct-slot) |
118 | attribute-objects |
119 | :key #'attribute-name))) |
120 | (let ((initargs |
121 | (prepare-initargs attribute (direct-attribute-properties direct-slot)))) |
122 | |
123 | (apply #'reinitialize-instance attribute |
124 | initargs ) |
125 | (setf (slot-value description (attribute-name attribute)) |
126 | (attribute-class attribute)) |
3d5707d5 |
127 | (apply #'change-class attribute (find-class (attribute-class attribute)) |
1178c783 |
128 | initargs)))) |
129 | (when (slot-boundp class 'class-active-attributes-definition) |
130 | (with-described-object (nil description) |
131 | (setf (slot-value (find-attribute description 'active-attributes) 'value) |
132 | (slot-value class 'class-active-attributes-definition)))))))) |
133 | |
134 | (defun initialize-description-class (class) |
135 | |
136 | ;;; HACK: initialization does not happ en properly |
137 | ;;; when compiling and loading or something like that. |
138 | ;;; Obviously i'm not sure why. |
139 | ;;; So we're going to explicitly initialize things. |
140 | ;;; For now. --drewc |
141 | |
142 | (pushnew class *defined-descriptions*) |
143 | |
144 | ;;; ENDHACK. |
145 | |
146 | (let* ((description (find-layer class)) |
147 | (attribute-objects |
148 | (setf (description-class-attributes (class-of description)) |
149 | (compute-effective-attribute-objects description)))) |
150 | |
151 | (initialize-effective-attribute-values-for-description-class class description attribute-objects) |
152 | )) |
b7657b86 |
153 | |
154 | |
4358148e |
155 | |
156 | ;;;; HACK: run this at startup till we figure things out. |
157 | (defun initialize-descriptions () |
158 | (map nil #'initialize-description-class |
159 | (setf *defined-descriptions* |
160 | (remove-duplicates *defined-descriptions*)))) |
161 | |
162 | (defmethod initialize-instance :around ((class standard-description-class) &rest initargs &key (direct-superclasses '())) |
163 | (declare (dynamic-extent initargs)) |
164 | (prog1 |
165 | (if (loop for direct-superclass in direct-superclasses |
166 | thereis (ignore-errors (subtypep direct-superclass 'standard-description-object))) |
167 | (call-next-method) |
168 | (apply #'call-next-method |
169 | class |
170 | :direct-superclasses |
171 | (append direct-superclasses |
172 | (list (find-class 'standard-description-object))) |
173 | initargs)) |
174 | (initialize-description-class class))) |
175 | |
176 | |
177 | (defmethod reinitialize-instance :around ((class standard-description-class) &rest initargs &key (direct-superclasses '() direct-superclasses-p)) |
178 | (declare (dynamic-extent initargs)) |
179 | ; (warn "CLASS ~A ARGS ~A:" class initargs) |
180 | (prog1 |
181 | (if (or (not direct-superclasses-p) |
182 | (loop for direct-superclass in direct-superclasses |
183 | thereis (ignore-errors (subtypep direct-superclass 'standard-description-object)))) |
184 | (call-next-method) |
185 | (apply #'call-next-method |
186 | class |
187 | :direct-superclasses |
188 | (append direct-superclasses |
189 | (list (find-class 'standard-description-object))) |
190 | initargs)) |
191 | (initialize-description-class class))) |
192 | |
193 | |
194 | (defmethod print-object ((object standard-description-object) stream) |
195 | (print-unreadable-object (object stream :type nil :identity t) |
196 | (format stream "DESCRIPTION ~A" (ignore-errors (description-print-name object))))) |
197 | |
198 | (defmethod print-object ((object standard-description-class) stream) |
199 | (print-unreadable-object (object stream :type t :identity t) |
200 | (princ (ignore-errors (description-print-name (find-layer object))) stream))) |
201 | |
3d5707d5 |
202 | (defun find-description (name &optional (errorp t)) |
203 | (let ((class (find-class (defining-description name) errorp))) |
204 | (when class (find-layer class)))) |
4358148e |
205 | |
206 | |
207 | |
4867c86f |
208 | |
209 | |
210 | |