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1 | (in-package :lisp-on-lines) |
2 | |
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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-description standard-object () |
17 | ((editp :value t) |
18 | (class-slots :label "Slots" |
19 | :function (compose 'class-slots 'class-of))) |
20 | (:in-description editable)) |
21 | |
22 | (define-layered-class slot-definition-attribute (define-description-attribute) |
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23 | ((slot-name :initarg :slot-name |
24 | :accessor attribute-slot-name |
25 | :layered t))) |
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26 | |
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27 | |
28 | (define-layered-method attribute-active-p :around ((attribute slot-definition-attribute)) |
29 | (let ((active? (slot-value attribute 'activep))) |
30 | (if (and (eq :when active?) |
31 | (unbound-slot-value-p (attribute-value attribute))) |
32 | NIL |
33 | |
34 | (call-next-method)))) |
35 | |
36 | (define-layered-method attribute-active-p |
37 | :in-layer #.(defining-description 'editable) |
38 | :around ((attribute slot-definition-attribute)) |
39 | (let ((active? (slot-value attribute 'activep))) |
40 | (if (and (eq :when active?) |
41 | (unbound-slot-value-p (attribute-value attribute))) |
42 | t |
43 | (call-next-method)))) |
44 | |
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45 | (defmethod shared-initialize :around ((object slot-definition-attribute) |
46 | slots &rest args) |
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47 | (with-active-descriptions (editable) |
48 | (prog1 (call-next-method) |
49 | (unless (attribute-setter object) |
50 | (setf (attribute-setter object) |
51 | (lambda (v o) |
52 | (setf (slot-value o (attribute-slot-name object)) v))))))) |
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53 | |
54 | |
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55 | (define-layered-method attribute-value-using-object (object (attribute slot-definition-attribute)) |
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56 | (if (slot-boundp object (attribute-slot-name attribute)) |
57 | |
58 | (slot-value object (attribute-slot-name attribute)) |
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59 | +unbound-slot+)) |
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60 | |
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61 | (defun attribute-slot-makunbound (attribute) |
62 | (slot-makunbound (attribute-object attribute) (attribute-slot-name attribute))) |
63 | |
64 | (defun ensure-description-for-class (class &key attributes (name (intern (format nil "DESCRIPTION-FOR-~A" (class-name class)))) |
65 | direct-superclasses direct-slot-specs) |
66 | |
67 | (let* ((super-descriptions |
68 | (mapcar #'class-of |
69 | (delete nil (mapcar (rcurry #'find-description nil) |
70 | (mapcar #'class-name direct-superclasses))))) |
71 | (desc-class |
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72 | (ensure-layer (defining-description name) |
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73 | :direct-superclasses (or super-descriptions (list (class-of (find-description 'standard-object)))) |
74 | :direct-slots |
75 | (loop |
76 | :for slot in (class-slots class) |
77 | :collect |
78 | (let ((direct-spec |
79 | (find (slot-definition-name slot) |
80 | direct-slot-specs |
81 | :key (rcurry 'getf :name)))) |
82 | (if direct-spec |
83 | (append (alexandria:remove-from-plist direct-spec |
84 | :initfunction |
85 | :initform |
86 | :initargs |
87 | :readers |
88 | :writers) |
89 | (unless |
90 | (getf direct-spec :attribute-class) |
91 | (list :attribute-class 'slot-definition-attribute)) |
92 | (unless |
93 | (getf direct-spec :label) |
94 | (list :label (format nil |
95 | "~@(~A~)" (substitute #\Space #\- (symbol-name (slot-definition-name slot)))))) |
96 | (list :slot-name (slot-definition-name slot))) |
97 | `(:name ,(slot-definition-name slot) |
98 | :attribute-class slot-definition-attribute |
99 | :slot-name ,(slot-definition-name slot) |
100 | :label ,(format nil |
101 | "~@(~A~)" (substitute #\Space #\- (symbol-name (slot-definition-name slot))))))) |
102 | :into slots |
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103 | :collect (slot-definition-name slot) :into names |
104 | :finally (return (cons `(:name active-attributes |
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105 | :value ',(or attributes names)) |
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106 | slots))) |
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107 | :metaclass 'define-description-class))) |
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108 | (unless (ignore-errors (find-description (class-name class))) |
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109 | (find-layer (ensure-layer (defining-description (class-name class)) |
110 | :direct-superclasses (list desc-class) |
111 | :metaclass 'define-description-class))))) |
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112 | |
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113 | |
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114 | (defclass described-class () |
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115 | ((direct-slot-specs :accessor class-direct-slot-specs) |
116 | (attributes :initarg :attributes :initform nil))) |
117 | |
118 | (defmethod ensure-class-using-class :around ((class described-class) name &rest args) |
119 | |
120 | (call-next-method)) |
121 | |
122 | (defmethod direct-slot-definition-class ((class described-class) &rest initargs) |
123 | (let ((slot-class (call-next-method))) |
124 | (make-instance (class-of slot-class) :direct-superclasses (list slot-class (find-class 'described-class-direct-slot-definition))))) |
125 | |
126 | (defclass described-class-direct-slot-definition () |
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127 | ()) |
128 | |
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129 | (defmethod shared-initialize :around ((class described-class-direct-slot-definition) slot-names &key &allow-other-keys) |
130 | (call-next-method)) |
131 | |
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132 | (defmethod validate-superclass |
133 | ((class described-class) |
134 | (superclass standard-class)) |
135 | t) |
136 | |
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137 | (defmethod initialize-instance :after ((class described-class) &rest initargs &key (direct-superclasses '()) direct-slots) |
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138 | (declare (dynamic-extent initargs)) |
139 | (finalize-inheritance class) |
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140 | (ensure-description-for-class class :direct-slot-specs direct-slots |
141 | :direct-superclasses direct-superclasses |
142 | :attributes (slot-value class 'attributes))) |
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143 | |
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144 | (defmethod reinitialize-instance :after ((class described-class) &rest initargs &key (direct-superclasses '()) direct-slots) |
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145 | (declare (dynamic-extent initargs)) |
146 | (finalize-inheritance class) |
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147 | (ensure-description-for-class class :direct-slot-specs direct-slots |
148 | :direct-superclasses direct-superclasses |
149 | :attributes (slot-value class 'attributes))) |
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150 | |
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151 | (defclass described-standard-class (described-class standard-class ) ()) |
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152 | |
153 | (defmethod validate-superclass |
154 | ((class described-standard-class) |
155 | (superclass standard-class)) |
156 | t) |
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157 | |
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158 | (define-layered-method description-of ((object standard-object)) |
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159 | (or (ignore-errors (find-description (class-name (class-of object)))) |
160 | (find-description 'standard-object))) |
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161 | |
162 | |
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163 | |