fixes to conform with new meta-model
[clinton/lisp-on-lines.git] / src / mewa / mewa.lisp
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*
7 '(boolean ucw::mewa-boolean
8 string ucw::mewa-string
9 number ucw::mewa-currency
10 integer ucw::mewa-integer
11 currency ucw::mewa-currency
12 ))
13
14 ;;; an alist of model-class-name . attributes
15 ;;; should really be a hash-table.
16 (defvar *attribute-map* (list))
17
18 ;;; some utilities for merging plists
19
20 (defun plist-nunion (new-props plist)
21 (loop for cons on new-props by #'cddr
22 do (setf (getf plist (first cons)) (second cons))
23 finally (return plist)))
24
25 (defun plist-union (new-props plist)
26 "Non-destructive version of plist-nunion"
27 (plist-nunion new-props (copy-list plist)))
28
29 (defun gen-ptype (type)
30 (or (getf *slot-type-map* type) type))
31
32 (defun gen-presentation-slots (instance)
33 (mapcar #'(lambda (x) (gen-pslot (cadr x)
34 (string (car x))
35 (car x)))
36 (meta-model:list-slot-types instance)))
37
38
39 (defun gen-pslot (type label slot-name)
40 (copy-list `(,(gen-ptype type)
41 :label ,label
42 :slot-name ,slot-name)))
43
44 (defun gen-presentation-args (instance args)
45 (declare (ignore instance))
46 (if args args nil))
47
48
49 (defun find-or-create-attributes (class-name)
50 "return an exisiting class attribute map or create one.
51
52 A map is a cons of class-name . attributes.
53 attributes is an alist keyed on the attribute name."
54 (or (assoc class-name *attribute-map*)
55 (progn
56 (setf *attribute-map* (acons class-name (list (list)) *attribute-map*))
57 (assoc class-name *attribute-map*))))
58
59 (defgeneric find-class-attributes (class))
60
61 (defmethod find-class-attributes ((model t))
62 (find-or-create-attributes (class-name (class-of model))))
63
64 (defmethod find-class-attributes ((model symbol))
65 (find-or-create-attributes model))
66
67 (defmethod clear-class-attributes ((model t))
68 (setf (cdr (find-class-attributes model)) nil))
69
70 (defmethod add-attribute ((model t) name def)
71 (let ((map (find-class-attributes model)))
72 (setf (cdr map) (acons name def (cdr map)))))
73
74 (defmethod find-attribute ((model t) name)
75 (assoc name (cdr (find-class-attributes model))))
76
77 (defmethod (setf find-attribute) ((def list) (model t) name)
78 (let ((attr (find-attribute model name)))
79 (if attr
80 (prog2
81 (setf (cdr attr) def)
82 attr)
83 (prog2
84 (add-attribute model name def)
85 (find-attribute model name)))))
86
87 (defmethod set-attribute ((model t) name definition &key (inherit t))
88 (setf (find-attribute model name)
89 (if inherit
90 (cons (car definition)
91 (plist-union (cdr definition)
92 (cddr (find-attribute model name))))
93 definition)))
94
95 (defmethod perform-set-attributes ((model t) definitions)
96 (dolist (def definitions)
97 (funcall #'set-attribute model (first def) (rest def))))
98
99 (defmethod set-attribute-properties ((model t) attribute properties)
100 (let ((a (find-attribute model attribute)))
101 (if a
102 (setf (cddr a) (plist-nunion properties (cddr a)))
103 (error "Attribute ~A does not exist" attribute) )))
104
105 (defmethod perform-set-attribute-properties ((model t) definitions)
106 (dolist (def definitions)
107 (funcall #'set-attribute-properties model (car def) (cdr def))))
108
109
110 (defmethod default-attributes ((model t))
111 "return the default attributes for a given model using the meta-model's meta-data"
112 (append (mapcar #'(lambda (s)
113 (cons (car s)
114 (gen-pslot
115 (if (meta-model:foreign-key-p model (car s))
116 'ucw::foreign-key
117 (cadr s))
118 (string (car s)) (car s))))
119 (meta-model:list-slot-types model))
120 (mapcar #'(lambda (s)
121 (cons s (append (gen-pslot 'ucw::has-many (string s) s)
122 `(:presentation
123 (make-presentation
124 ,model
125 :type :one-line)))))
126 (meta-model:list-has-many model))))
127
128 (defmethod set-default-attributes ((model t))
129 "Set the default attributes for MODEL"
130 (clear-class-attributes model)
131 (mapcar #'(lambda (x)
132 (setf (find-attribute model (car x)) (cdr x)))
133 (default-attributes model)))
134
135
136 (defgeneric attributes-getter (model))
137
138 ;;;presentations
139
140
141
142 (defcomponent mewa ()
143 ((ucw::instance :accessor instance :initarg :instance)
144 (attributes
145 :initarg :attributes
146 :accessor attributes
147 :initform nil)
148 (attributes-getter
149 :accessor attributes-getter
150 :initform #'get-attributes
151 :initarg :attributes-getter)
152 (attribute-slot-map
153 :accessor attribute-slot-map
154 :initform nil)
155 (global-properties
156 :initarg :global-properties
157 :accessor global-properties
158 :initform nil)
159 (classes
160 :initarg :classes
161 :accessor classes
162 :initform nil)
163 (use-instance-class-p
164 :initarg :use-instance-class-p
165 :accessor use-instance-class-p
166 :initform t)
167 (initializedp :initform nil)
168 (modifiedp :accessor modifiedp :initform nil :initarg :modifiedp)
169 (modifications :accessor modifications :initform nil)))
170
171
172 (defmethod attributes :around ((self mewa))
173 (let ((a (call-next-method)))
174 (or a (funcall (attributes-getter self) self))))
175
176 (defgeneric get-attributes (mewa))
177
178 (defmethod get-attributes ((self mewa))
179 (if (instance self)
180 (append (meta-model:list-slots (instance self))
181 (meta-model:list-has-many (instance self)))
182 nil))
183
184 (defmethod find-instance-classes ((self mewa))
185 (mapcar #'class-name
186 (it.bese.arnesi.mopp:compute-class-precedence-list (class-of (instance self)))))
187
188 (defmethod find-all-attributes ((self mewa))
189 (reduce #'append
190 (mapcar #'(lambda (x)
191 (cdr (find-class-attributes x)))
192 (classes self))))
193
194 (defun make-attribute (&rest props &key type &allow-other-keys)
195 (remf props :type)
196 (cons (gensym) (cons type props)))
197
198
199 (defmethod find-applicable-attributes ((self mewa))
200 (let ((all-attributes (find-all-attributes self)))
201 (flet ((gen-att (x) (let ((att (assoc x all-attributes)))
202 (when att
203 (setf (cddr att) (plist-union (global-properties self) (cddr att)))
204 att))))
205 (if (attributes self)
206 (remove 'nil
207 (mapcar #'(lambda (x)
208 (cond
209 ;;simple casee
210 ((symbolp x)
211 (gen-att x))
212 ;;if the car is a keyword then this is an inline def
213 ((and (listp x) (keywordp (car x)))
214 (let ((att (apply #'make-attribute x)))
215 (setf (cddr att)
216 (plist-union (cddr att) (global-properties self)))
217 att))
218 ;; if the plist has a :type
219 ((and (listp x) (getf (cdr x) :type))
220 (let ((new (cdr (apply #'make-attribute (cdr x))))
221 (def (gen-att (car x))))
222 (setf (cdr new) (plist-union (cdr new) (cddr def)))
223 (cons (car def) new)))
224 ;;finally if we are just overiding the props
225 ((and (listp x) (symbolp (car x)))
226 (let ((new (cdr (apply #'make-attribute (cdr x))))
227 (def (gen-att (car x))))
228 (setf (cdr new) (plist-union (cdr new) (cddr def)))
229 (cons (car def) (cons (second def) (cdr new)))))
230
231 )
232 )
233
234 (attributes self)))
235 all-attributes))))
236
237 (defmethod find-slot-presentation-for-attribute ((self mewa) attribute)
238 (let ((class-name
239 (or (gethash (if (consp (second attribute))
240 (car (second attribute))
241 (second attribute))
242 ucw::*slot-type-mapping*)
243 (error "Can't find slot type for ~A" (second attribute)))))
244
245 (cons (first attribute) (apply #'make-instance
246 class-name
247 (append (cddr attribute) (list :parent self :size 30))))))
248
249 (defmethod find-slot-presentations ((self mewa))
250 (mapcar #'(lambda (a) (find-slot-presentation-for-attribute self a))
251 (find-applicable-attributes self)))
252
253 (defmethod find-attribute-slot ((self mewa) (attribute symbol))
254 (cdr (assoc attribute (attribute-slot-map self))))
255
256 (defmethod initialize-slots ((self mewa))
257 (when (instance self)
258 (when (use-instance-class-p self)
259 (setf (classes self)
260 (append (find-instance-classes self)
261 (classes self))))
262 (setf (attribute-slot-map self) (find-slot-presentations self))
263 (setf (slots self) (mapcar #'(lambda (x)(cdr x)) (attribute-slot-map self )))))
264
265 (defmethod make-presentation ((object t) &key (type :viewer) (initargs nil))
266 (let* ((p (make-instance 'mewa-object-presentation))
267 (a (progn (setf (slot-value p 'ucw::instance) object)
268 (initialize-slots p)
269 (assoc type (find-all-attributes p))))
270 ;;;; TODO: this can be cleaned up, probably CHANGE-CLASS is better here
271 (i (apply #'make-instance (or (second a)
272 ;; if we didnt find the type,
273 ;; use the symbol as a class.
274 (if (eql (symbol-package type)
275 (find-package 'keyword))
276 (symbol-name type)
277 type))
278 (plist-union initargs (cddr a)))))
279 (setf (slot-value i 'instance) object)
280 (initialize-slots i)
281 (setf (slot-value i 'initializedp) t)
282 i))
283
284
285 (defmethod initialize-slots-place ((place ucw::place) (mewa mewa))
286 (setf (slots mewa) (mapcar #'(lambda (x)
287 (prog1 x
288 (setf (component.place x) place)))
289 (slots mewa))))
290
291 (arnesi:defmethod/cc call-component :before ((from standard-component) (to mewa))
292 (unless (slot-value to 'initializedp)
293 (initialize-slots to))
294 (setf (slot-value to 'initializedp) t)
295 (initialize-slots-place (component.place from) to)
296 to)
297
298
299
300 (defmacro call-presentation (object &rest args)
301 `(present-object ,object :presentation (make-presentation ,object ,@args)))
302
303
304 (defcomponent about-dialog (option-dialog)
305 ((body :initarg :body)))
306
307 (defmethod render-on ((res response) (self about-dialog))
308 (call-next-method)
309 (render-on res (slot-value self 'body)))
310
311
312 (defmethod instance-is-stored-p ((instance clsql:standard-db-object))
313 (slot-value instance 'clsql-sys::view-database))
314
315 (defmethod instance-is-stored-p ((mewa mewa))
316 (instance-is-stored-p (instance mewa)))
317
318 (defaction cancel-save-instance ((self mewa))
319 (cond
320 ((instance-is-stored-p (instance self))
321 (meta-model::update-instance-from-records (instance self))
322 (answer self))
323 (t (answer nil))))
324
325 (defaction save-instance ((self mewa))
326 (meta-model:sync-instance (instance self))
327 (setf (modifiedp self) nil)
328 (answer self))
329
330
331 (defaction ensure-instance-sync ((self mewa))
332 (when (modifiedp self)
333 (let ((message (format nil "Record has been modified, Do you wish to save the changes?")))
334 (case (call 'about-dialog
335 :body (make-presentation (instance self)
336 :type :viewer)
337 :message message
338 :options '((:save . "Save changes to Database")
339 (:cancel . "Cancel all changes")))
340 (:cancel
341 (cancel-save-instance self))
342 (:save
343 (save-instance self))))))
344
345 (defaction ok ((self mewa) &optional arg)
346 "Returns the component if it has not been modified. if it has been, prompt user to save or cancel"
347 ;(declare (ignore arg))
348 (meta-model::sync-instance (instance self))
349 (answer (instance self)))
350
351 (defmethod (setf presentation-slot-value) :around (value (slot slot-presentation) instance)
352 (let* ((old (prog1
353 (presentation-slot-value slot instance)
354 (call-next-method)))
355 (new (presentation-slot-value slot instance)))
356
357 (unless (equal new old )
358 (let ((self (ucw::parent slot)))
359 (setf (modifiedp self) instance
360 (modifications self) (append (list new old value slot instance) (modifications self)))))))
361
362 ;;;; * Finally set up some defaults
363
364 (setf (find-attribute t :viewer)
365 '(mewa-object-presentation :global-properties (:editablep nil))
366 (find-attribute t :editor)
367 '(mewa-object-presentation :global-properties (:editablep t))
368 (find-attribute t :creator)
369 '(mewa-object-presentation :global-properties (:editablep t))
370 (find-attribute t :one-line)
371 '(mewa-one-line-presentation)
372 (find-attribute t :listing)
373 '(mewa-list-presentation :global-properties (:editablep nil) :editablep t)
374 (find-attribute t :search-model)
375 '(mewa-object-presentation))
376
377
378
379
380
381 ;; This software is Copyright (c) Drew Crampsie, 2004-2005.
382 ;; You are granted the rights to distribute
383 ;; and use this software as governed by the terms
384 ;; of the Lisp Lesser GNU Public License
385 ;; (http://opensource.franz.com/preamble.html),
386 ;; known as the LLGPL.