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1 | (in-package :mewa) |
2 | |
3 | (defparameter *default-type* :ucw) |
4 | |
5 | ;;; maps meta-model slot-types to slot-presentation |
6 | (defparameter *slot-type-map* '(number ucw:currency)) |
7 | |
8 | ;;; an alist of model-class-name . attributes |
9 | ;;; should really be a hash-table. |
10 | (defvar *attribute-map* (list)) |
11 | |
12 | ;;; some utilities for merging plists |
13 | |
14 | (defun plist-nunion (new-props plist) |
15 | (loop for cons on new-props |
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16 | for i from 1 |
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17 | when (oddp i) |
18 | do (setf (getf plist (first cons)) (second cons)) |
19 | finally (return plist))) |
20 | |
21 | (defun plist-union (new-props plist) |
22 | "Non-destructive version of plist-nunion" |
23 | (plist-nunion new-props (copy-list plist))) |
24 | |
25 | (defun gen-ptype (type) |
26 | (or (getf *slot-type-map* type) type)) |
27 | |
28 | (defun gen-presentation-slots (instance) |
29 | (mapcar #'(lambda (x) (gen-pslot (cadr x) |
30 | (string (car x)) |
31 | (car x))) |
32 | (list-slot-types instance))) |
33 | |
34 | |
35 | (defun gen-pslot (type label slot-name) |
36 | (copy-list `(,(gen-ptype type) |
37 | :label ,label |
38 | :slot-name ,slot-name))) |
39 | |
40 | (defun gen-presentation-args (instance args) |
41 | (declare (ignore instance)) |
42 | (if args args nil)) |
43 | |
44 | |
45 | (defun find-or-create-attributes (class-name) |
46 | "return an exisiting class attribute map or create one. |
47 | |
48 | A map is a cons of class-name . attributes. |
49 | attributes is an alist keyed on the attribute nreeame." |
50 | (or (assoc class-name *attribute-map*) |
51 | (progn |
52 | (setf *attribute-map* (acons class-name (list (list)) *attribute-map*)) |
53 | (assoc class-name *attribute-map*)))) |
54 | |
55 | (defgeneric find-class-attributes (class)) |
56 | |
57 | (defmethod find-class-attributes ((model t)) |
58 | (find-or-create-attributes (class-name (class-of model)))) |
59 | |
60 | (defmethod find-class-attributes ((model symbol)) |
61 | (find-or-create-attributes model)) |
62 | |
63 | (defmethod add-attribute ((model t) name def) |
64 | (let ((map (find-class-attributes model))) |
65 | (setf (cdr map) (acons name def (cdr map))))) |
66 | |
67 | (defmethod find-attribute ((model t) name) |
68 | (assoc name (cdr (find-class-attributes model)))) |
69 | |
70 | (defmethod (setf find-attribute) ((def list) (model t) name) |
71 | (let ((attr (find-attribute model name))) |
72 | (if attr |
73 | (prog2 |
74 | (setf (cdr attr) def) |
75 | attr) |
76 | (prog2 |
77 | (add-attribute model name def) |
78 | (find-attribute model name))))) |
79 | |
80 | (defmethod set-attribute ((model t) name definition &key (inherit t)) |
81 | (setf (find-attribute model name) |
82 | (if inherit |
83 | (cons (car definition) |
84 | (plist-union (cdr definition) |
85 | (cddr (find-attribute model name)))) |
86 | definition))) |
87 | |
88 | |
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89 | (defmethod default-attributes ((model t)) |
90 | (append (mapcar #'(lambda (s) (cons (car s) (gen-pslot (if (meta-model:foreign-key-p model (car s)) |
91 | 'ucw::foreign-key |
92 | (cadr s)) |
93 | (string (car s)) (car s)))) |
94 | (meta-model:list-slot-types model)) |
95 | (mapcar #'(lambda (s) (cons s (append (gen-pslot 'ucw::has-many (string s) s) `(:presentation (make-presentation ,model :type :one-line))))) |
96 | (meta-model:list-has-many model)))) |
97 | |
98 | (defmethod set-default-attributes ((model t)) |
99 | (mapcar #'(lambda (x) |
100 | (setf (find-attribute model (car x)) (cdr x))) |
101 | (default-attributes model))) |
102 | |
103 | |
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104 | (defgeneric attributes-getter (model)) |
105 | |
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106 | ;;;presentations |
107 | |
108 | |
109 | |
110 | |
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111 | (defcomponent mewa () |
112 | ((attributes |
113 | :initarg :attributes |
114 | :accessor attributes |
115 | :initform nil) |
116 | (attributes-getter |
117 | :accessor attributes-getter |
118 | :initform #'get-attributes |
119 | :initarg :attributes-getter) |
120 | (global-properties |
121 | :initarg :global-properties |
122 | :accessor global-properties |
123 | :initform nil) |
124 | (classes |
125 | :initarg :classes |
126 | :accessor classes |
127 | :initform nil) |
128 | (use-instance-class-p |
129 | :initarg :use-instance-class-p |
130 | :accessor use-instance-class-p |
131 | :initform t) |
132 | (initializedp :initform nil) |
133 | (modifiedp :accessor modifiedp :initform nil))) |
134 | |
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135 | |
136 | (defmethod attributes :around ((self mewa)) |
137 | (let ((a (call-next-method))) |
138 | (or a (funcall (attributes-getter self) self)))) |
139 | |
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140 | (defgeneric get-attributes (mewa)) |
141 | |
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142 | (defmethod get-attributes ((self mewa)) |
143 | (if (instance self) |
144 | (append (meta-model:list-slots (instance self)) |
145 | (meta-model:list-has-many (instance self))) |
146 | nil)) |
147 | |
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148 | |
149 | (defmethod find-instance-classes ((self mewa)) |
150 | (mapcar #'class-name |
151 | (it.bese.arnesi.mopp:compute-class-precedence-list (class-of (instance self))))) |
152 | |
153 | (defmethod find-all-attributes ((self mewa)) |
154 | (reduce #'append |
155 | (mapcar #'(lambda (x) |
156 | (cdr (find-class-attributes x))) |
157 | (classes self)))) |
158 | |
159 | (defun make-attribute (&rest props &key type &allow-other-keys) |
160 | (remf props :type) |
161 | (cons (gensym) (cons type props))) |
162 | |
163 | |
164 | (defmethod find-applicable-attributes ((self mewa)) |
165 | (let ((all-attributes (find-all-attributes self))) |
166 | (flet ((gen-att (x) (let ((att (assoc x all-attributes))) |
167 | (when att |
168 | (setf (cddr att) (plist-union (global-properties self) (cddr att))) |
169 | att)))) |
170 | (if (attributes self) |
171 | (remove 'nil |
172 | (mapcar #'(lambda (x) |
173 | (cond |
174 | ;;simple casee |
175 | ((symbolp x) |
176 | (gen-att x)) |
177 | ;;if the car is a keyword then this is an inline def |
178 | ((and (listp x) (keywordp (car x))) |
179 | (let ((att (apply #'make-attribute x))) |
180 | (setf (cddr att) |
181 | (plist-union (cddr att) (global-properties self))) |
182 | att)) |
183 | ;; if the plist has a :type |
184 | ((and (listp x) (getf (cdr x) :type)) |
185 | (let ((new (cdr (apply #'make-attribute (cdr x)))) |
186 | (def (gen-att (car x)))) |
187 | (setf (cdr new) (plist-union (cdr new) (cddr def))) |
188 | (cons (car def) new))) |
189 | ;;finally if we are just overiding the props |
190 | ((and (listp x) (symbolp (car x))) |
191 | (let ((new (cdr (apply #'make-attribute (cdr x)))) |
192 | (def (gen-att (car x)))) |
193 | (setf (cdr new) (plist-union (cdr new) (cddr def))) |
194 | (cons (car def) (cons (second def) (cdr new))))) |
195 | |
196 | ) |
197 | ) |
198 | |
199 | (attributes self))) |
200 | all-attributes)))) |
201 | |
202 | (defmethod find-slot-presentations ((self mewa)) |
203 | (mapcar #'(lambda (s) |
204 | (let ((class-name (or (gethash (second s) ucw::*slot-type-mapping*) 'mewa-object-presentation))) |
205 | (apply #'make-instance |
206 | class-name |
207 | (append (cddr s) (list :parent self))))) |
208 | (find-applicable-attributes self))) |
209 | |
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210 | |
211 | |
212 | (defmethod initialize-slots ((self mewa)) |
213 | (when (use-instance-class-p self) |
214 | (setf (classes self) |
215 | (append (find-instance-classes self) |
216 | (classes self)))) |
217 | (setf (slots self) (find-slot-presentations self))) |
218 | |
219 | |
220 | (defmethod render-on :around ((res response) (self mewa)) |
221 | (unless (slot-value self 'initializedp) |
222 | (initialize-slots self)) |
223 | (setf (slot-value self 'initializedp) t) |
224 | (call-next-method)) |
225 | |
226 | |
227 | (defmethod make-presentation ((object t) &key (type :viewer) (initargs nil)) |
228 | (let* ((p (make-instance 'mewa-object-presentation)) |
229 | (a (progn (setf (slot-value p 'instance) object) |
230 | (initialize-slots p) |
231 | (assoc type (find-all-attributes p)))) |
232 | |
233 | (i (apply #'make-instance (second a) (plist-union initargs (cddr a))))) |
234 | (setf (slot-value i 'instance) object) |
235 | i)) |
236 | |
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237 | (defmethod make-presentation ((object t) &key (type :viewer) (initargs nil)) |
238 | (let* ((p (make-instance 'mewa-object-presentation)) |
239 | (a (progn (setf (slot-value p 'instance) object) |
240 | (initialize-slots p) |
241 | (assoc type (find-all-attributes p)))) |
242 | |
243 | (i (apply #'make-instance (or (second a) |
244 | ;; if we didnt find the type, |
245 | ;; use the symbol as a class. |
246 | (if (eql (symbol-package type) |
247 | (find-package 'keyword)) |
248 | (symbol-name type) |
249 | type)) |
250 | (plist-union initargs (cddr a))))) |
251 | (setf (slot-value i 'instance) object) |
252 | i)) |
253 | |
254 | |
255 | |
256 | |
257 | |
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258 | (defmethod call-component :before ((from standard-component) (to mewa)) |
259 | (unless (slot-value to 'initializedp) |
260 | (initialize-slots to)) |
261 | (setf (slot-value to 'initializedp) t) |
262 | (setf (slots to) (mapcar #'(lambda (x) (prog2 |
263 | (setf (component.place x) (component.place from)) |
264 | x)) |
265 | (slots to)))) |
266 | |
267 | (defmacro call-presentation (object &rest args) |
268 | `(present-object ,object :presentation (make-presentation ,object ,@args))) |