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1 | (in-package :lisp-on-lines) |
2 | |
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3 | ;;;; * DESCRIPTIONS |
4 | ;;;; A description is an object which is used |
5 | ;;;; to describe another object. |
6 | |
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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 | |
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15 | (define-layered-class description-access-class (standard-layer-class contextl::special-layered-access-class ) |
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16 | ((defined-in-descriptions :initarg :in-description) |
17 | (mixin-class-p :initarg :mixinp))) |
18 | |
19 | (defmethod direct-slot-definition-class |
20 | ((class description-access-class) &key &allow-other-keys) |
21 | (find-class 'direct-attribute-definition-class)) |
22 | |
23 | (defmethod effective-slot-definition-class |
24 | ((class description-access-class) &key &allow-other-keys) |
25 | (find-class 'effective-attribute-definition-class)) |
26 | |
27 | (defmethod compute-effective-slot-definition |
28 | ((class description-access-class) name direct-slot-definitions) |
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29 | (declare (ignore name)) |
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30 | (let ((attribute (call-next-method))) |
31 | (setf (attribute-direct-attributes attribute) direct-slot-definitions) |
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32 | (setf (attribute-object-initargs attribute) |
33 | ;; This plist will be used to init the attribute object |
34 | ;; Once the description itself is properly initiated. |
35 | (list :name name |
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36 | 'effective-attribute attribute)) |
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37 | attribute)) |
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38 | |
39 | (defmethod slot-value-using-class ((class description-access-class) object slotd) |
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40 | (call-next-method) |
41 | #+nil (if (or |
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42 | (eq (slot-definition-name slotd) 'described-object) |
43 | (not (slot-boundp slotd 'attribute-object))) |
44 | (call-next-method) |
45 | (slot-definition-attribute-object slotd))) |
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46 | |
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47 | |
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48 | (eval-when (:compile-toplevel :load-toplevel :execute) |
49 | (defparameter *description-attributes* (make-hash-table))) |
50 | |
51 | |
52 | |
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53 | (defclass standard-description-class (description-access-class layered-class) |
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54 | ((attributes :accessor description-class-attributes :initform (list))) |
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55 | (:default-initargs :defining-metaclass 'description-access-class)) |
56 | |
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57 | |
58 | |
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59 | (defmethod validate-superclass |
60 | ((class standard-description-class) |
61 | (superclass standard-class)) |
62 | t) |
63 | |
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64 | (define-layered-class standard-description-object (standard-layer-object) |
65 | ((described-object :accessor described-object |
66 | :special t))) |
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67 | |
68 | (defun description-class-name (description-class) |
69 | (read-from-string (symbol-name (class-name description-class)))) |
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70 | |
71 | (defgeneric standard-description-p (description-candidate) |
72 | (:method (not-description) |
73 | NIL) |
74 | (:method ((description standard-description-object)) |
75 | T)) |
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76 | |
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77 | (defun initialize-description-class (class) |
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78 | |
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79 | ;;; HACK: initialization does not happ en properly |
80 | ;;; when compiling and loading or something like that. |
81 | ;;; Obviously i'm not sure why. |
82 | ;;; So we're going to explicitly initialize things. |
83 | ;;; For now. --drewc |
84 | |
85 | (pushnew class *defined-descriptions*) |
86 | |
87 | ;;; ENDHACK. |
88 | |
89 | (let* ((description (find-layer class)) |
90 | (attribute-objects |
91 | (setf (description-class-attributes (class-of description)) |
92 | (mapcar |
93 | (lambda (slot) |
94 | (or (find-attribute description |
95 | (slot-definition-name slot)) |
96 | (let* ((*init-time-description* description) |
97 | (attribute-class (or |
98 | (ignore-errors |
99 | (slot-value-using-class |
100 | (class-of description) description slot)) |
101 | 'standard-attribute)) |
102 | (attribute |
103 | (apply #'make-instance |
104 | attribute-class |
105 | :description description |
106 | :attribute-class attribute-class |
107 | (attribute-object-initargs slot)))) |
108 | (setf (slot-definition-attribute-object slot) attribute)))) |
109 | (remove 'described-object (class-slots (class-of description)) |
110 | :key #'slot-definition-name)))) |
111 | (defining-classes |
112 | (partial-class-defining-classes class))) |
113 | |
114 | (loop |
115 | :for (layer class) |
116 | :on defining-classes :by #'cddr |
117 | :do (funcall-with-layer-context |
118 | (adjoin-layer (find-layer layer) (current-layer-context)) |
119 | (lambda () |
120 | (loop :for direct-slot :in (class-direct-slots class) |
121 | :do (let ((attribute |
122 | (find (slot-definition-name direct-slot) |
123 | attribute-objects |
124 | :key #'attribute-name))) |
125 | (let ((initargs |
126 | (prepare-initargs attribute (direct-attribute-properties direct-slot)))) |
127 | |
128 | (apply #'reinitialize-instance attribute |
129 | initargs ) |
130 | (setf (slot-value description (attribute-name attribute)) |
131 | (attribute-class attribute)) |
132 | (apply #'change-class attribute (attribute-class attribute) |
133 | initargs))))))))) |
134 | |
135 | |
136 | #+old(defun initialize-description-class (class) |
137 | |
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138 | ;;; HACK: initialization does not happ en properly |
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139 | ;;; when compiling and loading or something like that. |
140 | ;;; Obviously i'm not sure why. |
141 | ;;; So we're going to explicitly initialize things. |
142 | ;;; For now. --drewc |
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143 | |
144 | (pushnew class *defined-descriptions*) |
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145 | |
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146 | ;;; ENDHACK. |
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147 | |
148 | (let* ((description (find-layer class)) |
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149 | (attribute-objects |
150 | (mapcar |
151 | (lambda (slot) |
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152 | (let* ((*init-time-description* description) |
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153 | (attribute |
154 | (apply #'make-instance |
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155 | 'standard-attribute |
156 | :description description |
157 | (attribute-object-initargs slot)))) |
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158 | |
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159 | |
160 | (setf (slot-definition-attribute-object slot) attribute))) |
161 | (remove 'described-object (class-slots (class-of description)) |
162 | :key #'slot-definition-name))) |
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163 | (defining-classes (partial-class-defining-classes (class-of description)))) |
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164 | |
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165 | (loop |
166 | :for (layer class) |
167 | :on defining-classes :by #'cddr |
168 | :do (funcall-with-layer-context |
169 | (adjoin-layer (find-layer layer) (current-layer-context)) |
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170 | (lambda () |
171 | (loop :for direct-slot :in (class-direct-slots class) |
172 | :do (let ((attribute |
173 | (find (slot-definition-name direct-slot) |
174 | attribute-objects |
175 | :key #'attribute-name))) |
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176 | (let ((initargs |
177 | (prepare-initargs attribute (direct-attribute-properties direct-slot)))) |
178 | |
179 | (apply #'reinitialize-instance attribute |
180 | initargs ) |
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181 | (warn "Attribute class for ~A is ~A" attribute (attribute-class attribute)) |
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182 | (when (not (eq (find-class (attribute-class attribute)) |
183 | (class-of attribute))) |
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184 | (warn "~%CHANGING CLASS~%") |
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185 | |
186 | (apply #'change-class attribute (attribute-class attribute) |
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187 | initargs)))))))))) |
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188 | |
189 | ;;;; HACK: run this at startup till we figure things out. |
190 | (defun initialize-descriptions () |
191 | (map nil #'initialize-description-class |
192 | (setf *defined-descriptions* |
193 | (remove-duplicates *defined-descriptions*)))) |
194 | |
195 | (defmethod initialize-instance :around ((class standard-description-class) &rest initargs &key (direct-superclasses '())) |
196 | (declare (dynamic-extent initargs)) |
197 | (prog1 |
198 | (if (loop for direct-superclass in direct-superclasses |
199 | thereis (ignore-errors (subtypep direct-superclass 'standard-description-object))) |
200 | (call-next-method) |
201 | (apply #'call-next-method |
202 | class |
203 | :direct-superclasses |
204 | (append direct-superclasses |
205 | (list (find-class 'standard-description-object))) |
206 | initargs)) |
207 | (initialize-description-class class))) |
208 | |
209 | |
210 | (defmethod reinitialize-instance :around ((class standard-description-class) &rest initargs &key (direct-superclasses '() direct-superclasses-p)) |
211 | (declare (dynamic-extent initargs)) |
212 | ; (warn "CLASS ~A ARGS ~A:" class initargs) |
213 | (prog1 |
214 | (if (or (not direct-superclasses-p) |
215 | (loop for direct-superclass in direct-superclasses |
216 | thereis (ignore-errors (subtypep direct-superclass 'standard-description-object)))) |
217 | (call-next-method) |
218 | (apply #'call-next-method |
219 | class |
220 | :direct-superclasses |
221 | (append direct-superclasses |
222 | (list (find-class 'standard-description-object))) |
223 | initargs)) |
224 | (initialize-description-class class))) |
225 | |
226 | |
227 | (defmethod print-object ((object standard-description-object) stream) |
228 | (print-unreadable-object (object stream :type nil :identity t) |
229 | (format stream "DESCRIPTION ~A" (ignore-errors (description-print-name object))))) |
230 | |
231 | (defmethod print-object ((object standard-description-class) stream) |
232 | (print-unreadable-object (object stream :type t :identity t) |
233 | (princ (ignore-errors (description-print-name (find-layer object))) stream))) |
234 | |
235 | (defun find-description (name) |
236 | (find-layer (find-class (defining-description name)))) |
237 | |
238 | |
239 | |
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240 | |
241 | |
242 | |