3 (defun g-value-zero (g-value)
4 "Initializes the GValue in \"unset\" state.
6 @arg[g-value]{a C pointer to the GValue structure}"
8 for i from 0 below (foreign-type-size 'g-value)
9 do (setf (mem-ref g-value :uchar i) 0)))
11 (defun gvalue-type (gvalue)
12 (foreign-slot-value gvalue 'g-value :type))
14 (defmacro ev-case (keyform &body clauses)
15 "Macro that is an analogue of CASE except that it evaluates keyforms"
16 (let ((value (gensym)))
17 `(let ((,value ,keyform))
20 for (key . forms) in clauses
24 `((equalp ,key ,value) ,@forms)))))))
26 (defgeneric parse-gvalue-for-type (gvalue-ptr type-numeric))
28 (defmethod parse-gvalue-for-type (gvalue-ptr type-numeric)
29 (if (= type-numeric (g-type-numeric (g-type-fundamental type-numeric)))
31 (parse-gvalue-for-type gvalue-ptr (g-type-numeric (g-type-fundamental type-numeric)))))
33 (defun parse-gvalue (gvalue)
34 "Parses the GValue structure and returns the corresponding Lisp object.
36 @arg[value]{a C pointer to the GValue structure}
37 @return{value contained in the GValue structure. Type of value depends on GValue type}"
38 (let* ((type (g-type-numeric (gvalue-type gvalue)))
39 (fundamental-type (g-type-numeric (g-type-fundamental type))))
40 (ev-case fundamental-type
41 (+g-type-invalid+ (error "GValue is of invalid type (~A)" (g-type-name type)))
43 (+g-type-char+ (g-value-get-char gvalue))
44 (+g-type-uchar+ (g-value-get-uchar gvalue))
45 (+g-type-boolean+ (g-value-get-boolean gvalue))
46 (+g-type-int+ (g-value-get-int gvalue))
47 (+g-type-uint+ (g-value-get-uint gvalue))
48 (+g-type-long+ (g-value-get-long gvalue))
49 (+g-type-ulong+ (g-value-get-ulong gvalue))
50 (+g-type-int64+ (g-value-get-int64 gvalue))
51 (+g-type-uint64+ (g-value-get-uint64 gvalue))
52 (+g-type-enum+ (parse-gvalue-enum gvalue))
53 (+g-type-flags+ (parse-gvalue-flags gvalue))
54 (+g-type-float+ (g-value-get-float gvalue))
55 (+g-type-double+ (g-value-get-double gvalue))
56 (+g-type-string+ (g-value-get-string gvalue))
57 (t (parse-gvalue-for-type gvalue type)))))
59 (defmethod parse-gvalue-for-type (gvalue-ptr (type-numeric (eql +g-type-pointer+)))
60 (g-value-get-pointer gvalue-ptr))
62 (defmethod parse-gvalue-for-type (gvalue-ptr (type-numeric (eql +g-type-boxed+)))
63 (if (= (g-type-numeric (gvalue-type gvalue-ptr)) type-numeric)
64 (convert-from-foreign (g-value-get-boxed gvalue-ptr) '(glib:gstrv :free-from-foreign nil))
65 (parse-gvalue-boxed gvalue-ptr)))
67 (defmethod parse-gvalue-for-type (gvalue-ptr (type-numeric (eql +g-type-param+)))
68 (parse-g-param-spec (g-value-get-param gvalue-ptr)))
70 (defmethod parse-gvalue-for-type (gvalue-ptr (type-numeric (eql +g-type-object+)))
71 (parse-gvalue-object gvalue-ptr))
73 (defmethod parse-gvalue-for-type (gvalue-ptr (type-numeric (eql +g-type-interface+)))
74 (parse-gvalue-object gvalue-ptr))
76 (defgeneric set-gvalue-for-type (gvalue-ptr type-numeric value))
78 (defmethod set-gvalue-for-type (gvalue-ptr type-numeric value)
79 (if (= type-numeric (g-type-numeric (g-type-fundamental type-numeric)))
81 (set-gvalue-for-type gvalue-ptr (g-type-numeric (g-type-fundamental type-numeric)) value)))
83 (defun set-g-value (gvalue value type &key zero-g-value unset-g-value (g-value-init t))
84 "Assigns the GValue structure @code{gvalue} the value @code{value} of GType @code{type}.
86 @arg[gvalue]{a C pointer to the GValue structure}
87 @arg[value]{a Lisp object that is to be assigned}
88 @arg[type]{a GType that is to be assigned}
89 @arg[zero-g-value]{a boolean specifying whether GValue should be zero-initialized before assigning. See @fun{g-value-zero}}
90 @arg[unset-g-value]{a boolean specifying whether GValue should be \"unset\" before assigning. See @fun{g-value-unset}. The \"true\" value should not be passed to both @code{zero-g-value} and @code{unset-g-value} arguments}
91 @arg[g-value-init]{a boolean specifying where GValue should be initialized}"
92 (setf type (g-type-numeric type))
94 (zero-g-value (g-value-zero gvalue))
95 (unset-g-value (g-value-unset gvalue)))
96 (when g-value-init (g-value-init gvalue type))
97 (let ((fundamental-type (ensure-g-type (g-type-fundamental type))))
98 (ev-case fundamental-type
99 (+g-type-invalid+ (error "Invalid type (~A)" type))
101 (+g-type-char+ (g-value-set-char gvalue value))
102 (+g-type-uchar+ (g-value-set-uchar gvalue value))
103 (+g-type-boolean+ (g-value-set-boolean gvalue value))
104 (+g-type-int+ (g-value-set-int gvalue value))
105 (+g-type-uint+ (g-value-set-uint gvalue value))
106 (+g-type-long+ (g-value-set-long gvalue value))
107 (+g-type-ulong+ (g-value-set-ulong gvalue value))
108 (+g-type-int64+ (g-value-set-int64 gvalue value))
109 (+g-type-uint64+ (g-value-set-uint64 gvalue value))
110 (+g-type-enum+ (set-gvalue-enum gvalue value))
111 (+g-type-flags+ (set-gvalue-flags gvalue value))
112 (+g-type-float+ (unless (realp value) (error "~A is not a real number" value)) (g-value-set-float gvalue (coerce value 'single-float)))
113 (+g-type-double+ (unless (realp value) (error "~A is not a real number" value)) (g-value-set-double gvalue (coerce value 'double-float)))
114 (+g-type-string+ (g-value-set-string gvalue value))
115 (t (set-gvalue-for-type gvalue type value)))))
117 (defmethod set-gvalue-for-type (gvalue-ptr (type-numeric (eql +g-type-pointer+)) value)
118 (g-value-set-pointer gvalue-ptr value))
120 (defmethod set-gvalue-for-type (gvalue-ptr (type-numeric (eql +g-type-boxed+)) value)
121 (if (= (g-type-numeric (gvalue-type gvalue-ptr)) type-numeric)
122 (g-value-set-boxed gvalue-ptr (convert-to-foreign value '(glib:gstrv :free-from-foreign nil)))
123 (set-gvalue-boxed gvalue-ptr value)))
125 (defmethod set-gvalue-for-type (gvalue-ptr (type-numeric (eql +g-type-param+)) value)
126 (error "Setting of GParam is not implemented"))
128 (defmethod set-gvalue-for-type (gvalue-ptr (type-numeric (eql +g-type-object+)) value)
129 (set-gvalue-object gvalue-ptr value))
131 (defmethod set-gvalue-for-type (gvalue-ptr (type-numeric (eql +g-type-interface+)) value)
132 (set-gvalue-object gvalue-ptr value))
136 (defvar *registered-enum-types* (make-hash-table :test 'equal))
137 (defun register-enum-type (name type)
138 (setf (gethash name *registered-enum-types*) type))
139 (defun registered-enum-type (name)
140 (gethash name *registered-enum-types*))
142 (defun parse-gvalue-enum (gvalue)
143 (let* ((g-type (gvalue-type gvalue))
144 (type-name (g-type-name g-type))
145 (enum-type (registered-enum-type type-name)))
147 (error "Enum ~A is not registered" type-name))
148 (convert-from-foreign (g-value-get-enum gvalue) enum-type)))
150 (defun set-gvalue-enum (gvalue value)
151 (let* ((g-type (gvalue-type gvalue))
152 (type-name (g-type-name g-type))
153 (enum-type (registered-enum-type type-name)))
155 (error "Enum ~A is not registered" type-name))
156 (g-value-set-enum gvalue (convert-to-foreign value enum-type))))
161 (defvar *registered-flags-types* (make-hash-table :test 'equal))
162 (defun register-flags-type (name type)
163 (setf (gethash name *registered-flags-types*) type))
164 (defun registered-flags-type (name)
165 (gethash name *registered-flags-types*))
167 (defun parse-gvalue-flags (gvalue)
168 (let* ((g-type (gvalue-type gvalue))
169 (type-name (g-type-name g-type))
170 (flags-type (registered-flags-type type-name)))
172 (error "Flags ~A is not registered" type-name))
173 (convert-from-foreign (g-value-get-flags gvalue) flags-type)))
175 (defun set-gvalue-flags (gvalue value)
176 (let* ((g-type (gvalue-type gvalue))
177 (type-name (g-type-name g-type))
178 (flags-type (registered-flags-type type-name)))
180 (error "Flags ~A is not registered" type-name))
181 (g-value-set-flags gvalue (convert-to-foreign value flags-type))))
185 (defun parse-gvalue-object (gvalue)
186 (get-g-object-for-pointer (g-value-get-object gvalue)))
188 (defun set-gvalue-object (gvalue value)
189 (g-value-set-object gvalue (if value (pointer value) (null-pointer))))