(in-package :gobject)
-(defcfun g-value-init (:pointer g-value)
- "Initializes the GValue @code{value} with the default value of @code{type}
-
-@arg[value]{a C pointer to the GValue structure}
-@arg[type]{an integer specifying the GType}"
- (value (:pointer g-value))
- (type g-type))
-
(defun g-value-zero (g-value)
"Initializes the GValue in \"unset\" state.
for i from 0 below (foreign-type-size 'g-value)
do (setf (mem-ref g-value :uchar i) 0)))
-(defcfun g-value-copy :void
- (src-value (:pointer g-value))
- (dst-value (:pointer g-value)))
+(defun g-value-type (gvalue)
+ (foreign-slot-value gvalue 'g-value :type))
+
+(defmacro ev-case (keyform &body clauses)
+ "Macro that is an analogue of CASE except that it evaluates keyforms"
+ (let ((value (gensym)))
+ `(let ((,value ,keyform))
+ (cond
+ ,@(loop
+ for (key . forms) in clauses
+ collect
+ (if (eq key t)
+ `(t ,@forms)
+ `((equalp ,key ,value) ,@forms)))))))
+
+(defgeneric parse-g-value-for-type (gvalue-ptr gtype parse-kind))
+
+(defmethod parse-g-value-for-type :around (gvalue-ptr gtype parse-kind)
+ (assert (typep gtype '(or gtype nil)))
+ (call-next-method))
+
+(defmethod parse-g-value-for-type (gvalue-ptr gtype parse-kind)
+ (if (eq gtype (g-type-fundamental gtype))
+ (call-next-method)
+ (parse-g-value-for-type gvalue-ptr (g-type-fundamental gtype) parse-kind)))
+
+(defun parse-g-value (gvalue &key (parse-kind :get-property))
+ "Parses the GValue structure and returns the corresponding Lisp object.
+
+@arg[value]{a C pointer to the GValue structure}
+@return{value contained in the GValue structure. Type of value depends on GValue type}"
+ (let* ((type (g-value-type gvalue))
+ (fundamental-type (g-type-fundamental type)))
+ (ev-case fundamental-type
+ ((gtype +g-type-invalid+) (error "GValue is of invalid type (~A)" (gtype-name type)))
+ ((gtype +g-type-void+) nil)
+ ((gtype +g-type-char+) (g-value-get-char gvalue))
+ ((gtype +g-type-uchar+) (g-value-get-uchar gvalue))
+ ((gtype +g-type-boolean+) (g-value-get-boolean gvalue))
+ ((gtype +g-type-int+) (g-value-get-int gvalue))
+ ((gtype +g-type-uint+) (g-value-get-uint gvalue))
+ ((gtype +g-type-long+) (g-value-get-long gvalue))
+ ((gtype +g-type-ulong+) (g-value-get-ulong gvalue))
+ ((gtype +g-type-int64+) (g-value-get-int64 gvalue))
+ ((gtype +g-type-uint64+) (g-value-get-uint64 gvalue))
+ ((gtype +g-type-enum+) (parse-g-value-enum gvalue))
+ ((gtype +g-type-flags+) (parse-g-value-flags gvalue))
+ ((gtype +g-type-float+) (g-value-get-float gvalue))
+ ((gtype +g-type-double+) (g-value-get-double gvalue))
+ ((gtype +g-type-string+) (g-value-get-string gvalue))
+ (t (parse-g-value-for-type gvalue type parse-kind)))))
+
+(defmethod parse-g-value-for-type (gvalue-ptr (type (eql (gtype +g-type-pointer+))) parse-kind)
+ (declare (ignore parse-kind))
+ (g-value-get-pointer gvalue-ptr))
+
+(defmethod parse-g-value-for-type (gvalue-ptr (type (eql (gtype +g-type-param+))) parse-kind)
+ (declare (ignore parse-kind))
+ (parse-g-param-spec (g-value-get-param gvalue-ptr)))
+
+(defgeneric set-gvalue-for-type (gvalue-ptr type value))
+
+(defmethod set-gvalue-for-type :around (gvalue-ptr type value)
+ (assert (typep type '(or gtype null)))
+ (call-next-method))
+
+(defmethod set-gvalue-for-type (gvalue-ptr type value)
+ (if (eq type (g-type-fundamental type))
+ (call-next-method)
+ (set-gvalue-for-type gvalue-ptr (g-type-fundamental type) value)))
+
+(defun set-g-value (gvalue value type &key zero-g-value unset-g-value (g-value-init t))
+ "Assigns the GValue structure @code{gvalue} the value @code{value} of GType @code{type}.
+
+@arg[gvalue]{a C pointer to the GValue structure}
+@arg[value]{a Lisp object that is to be assigned}
+@arg[type]{a GType that is to be assigned}
+@arg[zero-g-value]{a boolean specifying whether GValue should be zero-initialized before assigning. See @fun{g-value-zero}}
+@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}
+@arg[g-value-init]{a boolean specifying where GValue should be initialized}"
+ (setf type (gtype type))
+ (cond
+ (zero-g-value (g-value-zero gvalue))
+ (unset-g-value (g-value-unset gvalue)))
+ (when g-value-init (g-value-init gvalue type))
+ (let ((fundamental-type (g-type-fundamental type)))
+ (ev-case fundamental-type
+ ((gtype +g-type-invalid+) (error "Invalid type (~A)" type))
+ ((gtype +g-type-void+) nil)
+ ((gtype +g-type-char+) (g-value-set-char gvalue value))
+ ((gtype +g-type-uchar+) (g-value-set-uchar gvalue value))
+ ((gtype +g-type-boolean+) (g-value-set-boolean gvalue value))
+ ((gtype +g-type-int+) (g-value-set-int gvalue value))
+ ((gtype +g-type-uint+) (g-value-set-uint gvalue value))
+ ((gtype +g-type-long+) (g-value-set-long gvalue value))
+ ((gtype +g-type-ulong+) (g-value-set-ulong gvalue value))
+ ((gtype +g-type-int64+) (g-value-set-int64 gvalue value))
+ ((gtype +g-type-uint64+) (g-value-set-uint64 gvalue value))
+ ((gtype +g-type-enum+) (set-gvalue-enum gvalue value))
+ ((gtype +g-type-flags+) (set-gvalue-flags gvalue value))
+ ((gtype +g-type-float+) (unless (realp value) (error "~A is not a real number" value)) (g-value-set-float gvalue (coerce value 'single-float)))
+ ((gtype +g-type-double+) (unless (realp value) (error "~A is not a real number" value)) (g-value-set-double gvalue (coerce value 'double-float)))
+ ((gtype +g-type-string+) (g-value-set-string gvalue value))
+ (t (set-gvalue-for-type gvalue type value)))))
+
+(defmethod set-gvalue-for-type (gvalue-ptr (type (eql (gtype +g-type-pointer+))) value)
+ (g-value-set-pointer gvalue-ptr value))
+
+(defmethod set-gvalue-for-type (gvalue-ptr (type (eql (gtype +g-type-param+))) value)
+ (declare (ignore gvalue-ptr value))
+ (error "Setting of GParam is not implemented"))
+
+;;Enums
+
+(defvar *registered-enum-types* (make-hash-table :test 'equal))
+(defun register-enum-type (name type)
+ (setf (gethash name *registered-enum-types*) type))
+(defun registered-enum-type (name)
+ (gethash name *registered-enum-types*))
+
+(defun parse-g-value-enum (gvalue)
+ (let* ((g-type (g-value-type gvalue))
+ (type-name (gtype-name g-type))
+ (enum-type (registered-enum-type type-name)))
+ (unless enum-type
+ (error "Enum ~A is not registered" type-name))
+ (convert-from-foreign (g-value-get-enum gvalue) enum-type)))
-(defcfun g-value-reset (:pointer g-value)
- (value (:pointer g-value)))
+(defun set-gvalue-enum (gvalue value)
+ (let* ((g-type (g-value-type gvalue))
+ (type-name (gtype-name g-type))
+ (enum-type (registered-enum-type type-name)))
+ (unless enum-type
+ (error "Enum ~A is not registered" type-name))
+ (g-value-set-enum gvalue (convert-to-foreign value enum-type))))
-(defcfun g-value-unset (:pointer g-value)
- "Clears the current value in @code{value} and \"unsets\" the type, releasing all resources associated with this GValue. An unset value is the same as an unitialized GValue.
-@arg[value]{a C pointer to the GValue structure}"
- (value (:pointer g-value)))
+;;Flags
-(defcfun g-value-set-instance :void
- (value (:pointer g-value))
- (instance :pointer))
+(defvar *registered-flags-types* (make-hash-table :test 'equal))
+(defun register-flags-type (name type)
+ (setf (gethash name *registered-flags-types*) type))
+(defun registered-flags-type (name)
+ (gethash name *registered-flags-types*))
-(defcfun g-strdup-value-contents :string
- (value (:pointer g-value)))
+(defun parse-g-value-flags (gvalue)
+ (let* ((g-type (g-value-type gvalue))
+ (type-name (gtype-name g-type))
+ (flags-type (registered-flags-type type-name)))
+ (unless flags-type
+ (error "Flags ~A is not registered" type-name))
+ (convert-from-foreign (g-value-get-flags gvalue) flags-type)))
+(defun set-gvalue-flags (gvalue value)
+ (let* ((g-type (g-value-type gvalue))
+ (type-name (gtype-name g-type))
+ (flags-type (registered-flags-type type-name)))
+ (unless flags-type
+ (error "Flags ~A is not registered" type-name))
+ (g-value-set-flags gvalue (convert-to-foreign value flags-type))))
projects / cl-gtk2.git / blobdiff