Removed legacy files from .asd
[clinton/lisp-on-lines.git] / src / defdisplay.lisp
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1(in-package :lisp-on-lines)
2
2b0fd9c8 3(define-layered-function display-using-description (description object component)
a4e6154d 4; (:argument-precedence-order )
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5 (:documentation
6 "Render the object in component,
7 using DESCRIPTION, which is an occurence, an attribute, or something else entirely."))
fdeed55d 8
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9(define-layered-method
10 display-using-description (d o c)
11 (<:as-html "default :" o))
12
13(defmethod find-layer-for-type (type)
14 type)
15
16
17(define-layered-function display (component object &rest args)
18 (:documentation
19 "Displays OBJECT in COMPONENT."))
20
21(define-layered-method display ((component t) (object t)
22 &rest properties
23 &key type
24 &allow-other-keys)
25 "The default display calls out via FUNCALL-WITH-LAYERS to tche DISPLAY-USING-DESCRIPTION method."
26
27 (let* ((occurence (find-occurence object))
28 (description (or (find-display-attribute
29 occurence
30 (setf type (or type (description.type occurence))))
31 occurence)))
32 (if description
33 (dletf (((description.type occurence) type)
34 ((description.layers description) (append `(+
35
36 ;;find-layer-for-type is a
37 ;; backwards compat thing
38 ,(find-layer-for-type
39 type))
40 (description.layers description)))
41 ((attributes description) (or
42 (attributes description)
43 (list-slots object))))
44 (funcall-with-description
45 description properties
46 #'display-using-description description object component))
47 (error "no description for ~A" object))))
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48
49;;;;; Macros
a4e6154d 50
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51
52(defun funcall-with-description (description properties function &rest args)
53 (if description
54 (dletf* (((description.type description) (or
55 (getf properties :type)
56 (description.type description)))
57
58 ((description.layers description) (append
59 (description.layers description)
60 (getf properties :layers)))
61 ((description.properties description) properties))
62 (funcall-with-layers
63 (description.layers description)
64 #'(lambda ()
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65 (contextl::funcall-with-special-initargs
66 (list (cons description properties))
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67 #'(lambda ()
68 (apply function args))))))
69 (apply function args)))
70
71
72
73(defmacro with-description ((description &rest properties) &body body)
74 `(funcall-with-description ,description (if ',(cdr properties)
75 (list ,@properties)
76 ,(car properties))
77 #'(lambda ()
78 ,@body)))
79
80(defmacro do-attributes ((var description &optional (attributes `(attributes ,description))) &body body)
fdeed55d 81 (with-unique-names (att properties type)
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82 `(dolist* (,att ,attributes)
83 (let* ((,att (ensure-list ,att))
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84 (,properties (rest ,att))
85 (,type (getf ,properties :type))
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86 (,var (let ((a (find-attribute ,description (first ,att))))
87 (if ,type
88 (apply #'make-attribute :name (first ,att) :type ,type ,properties)
89 (if a a (make-attribute :name (first ,att) :slot-name (first ,att)))))))
90 (funcall-with-description ,var ,properties
91 #'(lambda () ,@body))))))
92
93(defmacro with-component ((component) &body body)
94 `(let ((self ,component))
95 (declare (ignorable self))
96 (flet ((display* (thing &rest args)
97 (apply #'display ,component thing args))
98 (display-attribute (attribute obj &optional props)
99 (if props
100 (funcall-with-description
101 attribute props
102 #'display-using-description attribute obj ,component)
103 (display-using-description attribute obj ,component))))
104 (declare (ignorable #'display* #'display-attribute))
105 ,@body)))
106
107(defmacro defdisplay (&body body)
108 (loop with in-layerp = (eq (car body) :in-layer)
109 with layer = (if in-layerp (cadr body) 't)
110 for tail on (if in-layerp (cddr body) body)
111 until (listp (car tail))
112 collect (car tail) into qualifiers
113 finally
114 (when (member :in-layer qualifiers)
115 (error "Incorrect occurrence of :in-layer in defdisplay. Must occur before qualifiers."))
116 (return
117 (destructuring-bind (description object &optional component) (car tail)
118 (with-unique-names (d c)
119 (let (standard-description-p)
120 `(define-layered-method
121 display-using-description
122 :in-layer ,layer
123 ,@qualifiers
124
125 (,(cond
126 ((listp description)
127 (setf d (car description))
128 description)
129 (t
130 (setf d description)
131 (setf standard-description-p t)
132 `(,d description)))
133 ,object
134 ,(cond
135 ((null component)
136 `(,c component))
137 ((listp component)
138 (setf c (car component))
139 component)
140 (t
141 (setf c component)
142 `(,c component))))
143 (with-component (,c)
144 ,@(cdr tail)))))))))
145
146