4358148e |
1 | (in-package :lisp-on-lines) |
2 | |
6de8d300 |
3 | (defstruct unbound-slot-value (s)) |
4 | |
5 | (defvar +unbound-slot+ (make-unbound-slot-value)) |
6 | |
7 | (defmethod print-object ((object unbound-slot-value) stream) |
8 | (print-unreadable-object (object stream) |
9 | (format stream "UNBOUND"))) |
10 | |
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11 | (define-description standard-object () |
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12 | ((editp :value t) |
13 | (class-slots :label "Slots" |
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14 | :function (compose 'class-slots 'class-of)))) |
15 | |
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16 | (define-layered-class slot-definition-attribute (standard-attribute) |
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17 | ((slot-name :initarg :slot-name |
18 | :accessor attribute-slot-name |
19 | :layered t))) |
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20 | |
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21 | |
22 | (define-layered-method attribute-active-p :around ((attribute slot-definition-attribute)) |
23 | (let ((active? (slot-value attribute 'activep))) |
24 | (if (and (eq :when active?) |
25 | (unbound-slot-value-p (attribute-value attribute))) |
26 | NIL |
27 | |
28 | (call-next-method)))) |
29 | |
30 | (define-layered-method attribute-active-p |
31 | :in-layer #.(defining-description 'editable) |
32 | :around ((attribute slot-definition-attribute)) |
33 | (let ((active? (slot-value attribute 'activep))) |
34 | (if (and (eq :when active?) |
35 | (unbound-slot-value-p (attribute-value attribute))) |
36 | t |
37 | (call-next-method)))) |
38 | |
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39 | (defmethod shared-initialize :around ((object slot-definition-attribute) |
40 | slots &rest args) |
41 | (prog1 (call-next-method) |
42 | (unless (attribute-setter object) |
43 | (setf (attribute-setter object) |
44 | (lambda (v o) |
45 | (setf (slot-value o (attribute-slot-name object)) v)))))) |
46 | |
47 | |
e8d4fa45 |
48 | (define-layered-method attribute-value-using-object (object (attribute slot-definition-attribute)) |
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49 | (if (slot-boundp object (attribute-slot-name attribute)) |
50 | |
51 | (slot-value object (attribute-slot-name attribute)) |
b7657b86 |
52 | +unbound-slot+)) |
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53 | |
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54 | (defun attribute-slot-makunbound (attribute) |
55 | (slot-makunbound (attribute-object attribute) (attribute-slot-name attribute))) |
56 | |
57 | (defun ensure-description-for-class (class &key attributes (name (intern (format nil "DESCRIPTION-FOR-~A" (class-name class)))) |
58 | direct-superclasses direct-slot-specs) |
59 | |
60 | (let* ((super-descriptions |
61 | (mapcar #'class-of |
62 | (delete nil (mapcar (rcurry #'find-description nil) |
63 | (mapcar #'class-name direct-superclasses))))) |
64 | (desc-class |
65 | (ensure-class (defining-description name) |
66 | :direct-superclasses (or super-descriptions (list (class-of (find-description 'standard-object)))) |
67 | :direct-slots |
68 | (loop |
69 | :for slot in (class-slots class) |
70 | :collect |
71 | (let ((direct-spec |
72 | (find (slot-definition-name slot) |
73 | direct-slot-specs |
74 | :key (rcurry 'getf :name)))) |
75 | (if direct-spec |
76 | (append (alexandria:remove-from-plist direct-spec |
77 | :initfunction |
78 | :initform |
79 | :initargs |
80 | :readers |
81 | :writers) |
82 | (unless |
83 | (getf direct-spec :attribute-class) |
84 | (list :attribute-class 'slot-definition-attribute)) |
85 | (unless |
86 | (getf direct-spec :label) |
87 | (list :label (format nil |
88 | "~@(~A~)" (substitute #\Space #\- (symbol-name (slot-definition-name slot)))))) |
89 | (list :slot-name (slot-definition-name slot))) |
90 | `(:name ,(slot-definition-name slot) |
91 | :attribute-class slot-definition-attribute |
92 | :slot-name ,(slot-definition-name slot) |
93 | :label ,(format nil |
94 | "~@(~A~)" (substitute #\Space #\- (symbol-name (slot-definition-name slot))))))) |
95 | :into slots |
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96 | :collect (slot-definition-name slot) :into names |
97 | :finally (return (cons `(:name active-attributes |
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98 | :value ',(or attributes names)) |
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99 | slots))) |
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100 | :metaclass 'standard-description-class))) |
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101 | (unless (ignore-errors (find-description (class-name class))) |
102 | (ensure-class (defining-description (class-name class)) |
103 | :direct-superclasses (list desc-class) |
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104 | :metaclass 'standard-description-class)) |
105 | (find-description name))) |
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106 | |
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107 | |
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108 | (defclass described-class () |
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109 | ((direct-slot-specs :accessor class-direct-slot-specs) |
110 | (attributes :initarg :attributes :initform nil))) |
111 | |
112 | (defmethod ensure-class-using-class :around ((class described-class) name &rest args) |
113 | |
114 | (call-next-method)) |
115 | |
116 | (defmethod direct-slot-definition-class ((class described-class) &rest initargs) |
117 | (let ((slot-class (call-next-method))) |
118 | (make-instance (class-of slot-class) :direct-superclasses (list slot-class (find-class 'described-class-direct-slot-definition))))) |
119 | |
120 | (defclass described-class-direct-slot-definition () |
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121 | ()) |
122 | |
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123 | (defmethod shared-initialize :around ((class described-class-direct-slot-definition) slot-names &key &allow-other-keys) |
124 | (call-next-method)) |
125 | |
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126 | (defmethod validate-superclass |
127 | ((class described-class) |
128 | (superclass standard-class)) |
129 | t) |
130 | |
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131 | (defmethod initialize-instance :after ((class described-class) &rest initargs &key (direct-superclasses '()) direct-slots) |
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132 | (declare (dynamic-extent initargs)) |
133 | (finalize-inheritance class) |
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134 | (ensure-description-for-class class :direct-slot-specs direct-slots |
135 | :direct-superclasses direct-superclasses |
136 | :attributes (slot-value class 'attributes))) |
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137 | |
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138 | (defmethod reinitialize-instance :after ((class described-class) &rest initargs &key (direct-superclasses '()) direct-slots) |
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139 | (declare (dynamic-extent initargs)) |
140 | (finalize-inheritance class) |
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141 | (ensure-description-for-class class :direct-slot-specs direct-slots |
142 | :direct-superclasses direct-superclasses |
143 | :attributes (slot-value class 'attributes))) |
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144 | |
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145 | (defclass described-standard-class (described-class standard-class ) ()) |
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146 | |
147 | (defmethod validate-superclass |
148 | ((class described-standard-class) |
149 | (superclass standard-class)) |
150 | t) |
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151 | |
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152 | (define-layered-method description-of ((object standard-object)) |
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153 | (or (ignore-errors (find-description (class-name (class-of object)))) |
154 | (find-description 'standard-object))) |
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155 | |
156 | |
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157 | |