(has-reference
:type boolean
:accessor g-object-has-reference
- :initform nil)))
+ :initform nil))
+ (:documentation
+ "Base class for GObject classes hierarchy."))
(defvar *foreign-gobjects* (make-weak-hash-table :test 'equal :weakness :value))
(defvar *foreign-gobjects-ref-count* (make-hash-table :test 'equal))
(defvar *lisp-objects-pointers* (make-hash-table :test 'equal))
(defvar *current-creating-object* nil)
-(defcstruct g-object-struct
- (type-instance g-type-instance)
- (ref-count :uint)
- (qdata :pointer))
-
(defun ref-count (pointer)
- (foreign-slot-value (if (pointerp pointer) pointer (pointer pointer)) 'g-object-struct 'ref-count))
+ (foreign-slot-value (if (pointerp pointer) pointer (pointer pointer)) 'g-object-struct :ref-count))
(defmethod initialize-instance :around ((obj g-object) &key)
(let ((*current-creating-object* obj))
(gethash (pointer-address pointer) *foreign-gobjects*)
(gethash (pointer-address pointer) *foreign-gobjects-ref-count*)
(ref-count pointer))
- (awhen (gethash (pointer-address pointer) *foreign-gobjects*)
- (setf (pointer it) nil)
- (cancel-finalization it))
+ (let ((object (gethash (pointer-address pointer) *foreign-gobjects*)))
+ (when object
+ (setf (pointer object) nil)
+ (cancel-finalization object)))
(remhash (pointer-address pointer) *foreign-gobjects*)
(remhash (pointer-address pointer) *foreign-gobjects-ref-count*)
(g-object-unref pointer))
(defun registered-object-type-by-name (name)
(gethash name *registered-object-types*))
(defun get-g-object-lisp-type (g-type)
+ (setf g-type (ensure-g-type g-type))
(loop
while (not (zerop g-type))
for lisp-type = (gethash (g-type-name g-type) *registered-object-types*)
when lisp-type do (return lisp-type)
- do (setf g-type (g-type-parent g-type))))
+ do (setf g-type (ensure-g-type (g-type-parent g-type)))))
(defun make-g-object-from-pointer (pointer)
(let* ((g-type (g-type-from-instance pointer))
(defun get-g-object-for-pointer (pointer)
(unless (null-pointer-p pointer)
- (aif (gethash (pointer-address pointer) *foreign-gobjects*)
- (prog1 it
- (incf (gethash (pointer-address pointer) *foreign-gobjects-ref-count*))
- (debugf "increfering object ~A~%" pointer))
- (make-g-object-from-pointer pointer))))
+ (let ((object (gethash (pointer-address pointer) *foreign-gobjects*)))
+ (if object
+ (prog1 object
+ (incf (gethash (pointer-address pointer) *foreign-gobjects-ref-count*))
+ (debugf "increfering object ~A~%" pointer))
+ (make-g-object-from-pointer pointer)))))
(defmethod translate-from-foreign (pointer (type foreign-g-object-type))
(get-g-object-for-pointer pointer))
(register-object-type "GObject" 'g-object)
(defun ensure-g-type (type)
+ "Returns the GType value for a given type. If type is an integer, it is returned. If type is a string, GType corresponding to this type name is looked up and returned.
+@arg[type]{a string or and integer}
+@return{integer equal to GType of @code{type}}"
(etypecase type
(integer type)
(string (or (g-type-from-name type)
(etypecase object
(g-object (pointer object)))))
+(define-condition property-access-error (error)
+ ((property-name :initarg :property-name :reader property-access-error-property-name)
+ (class-name :initarg :class-name :reader property-access-error-class-name)
+ (message :initarg :message :reader property-access-error-message))
+ (:report (lambda (condition stream)
+ (format stream "Error accessing property '~A' on class '~A': ~A"
+ (property-access-error-property-name condition)
+ (property-access-error-class-name condition)
+ (property-access-error-message condition)))))
+
+(define-condition property-unreadable-error (property-access-error)
+ ()
+ (:default-initargs :message "property is not readable"))
+
+(define-condition property-unwritable-error (property-access-error)
+ ()
+ (:default-initargs :message "property is not writable"))
+
(defun g-param-spec-property-type (param-spec property-name object-type assert-readable assert-writable)
(when (null-pointer-p param-spec)
(error "Property ~A on type ~A is not found"
(not (member :readable
(foreign-slot-value param-spec
'g-param-spec
- 'flags))))
- (error "Property ~A on type ~A is not readable"
- property-name
- (g-type-name object-type)))
+ :flags))))
+ (error 'property-unreadable-error
+ :property-name property-name
+ :class-name (g-type-name object-type)))
(when (and assert-writable
(not (member :writable
(foreign-slot-value param-spec
'g-param-spec
- 'flags))))
- (error "Property ~A on type ~A is not writable"
- property-name
- (g-type-name object-type)))
- (foreign-slot-value param-spec 'g-param-spec 'value-type))
+ :flags))))
+ (error 'property-unwritable-error
+ :property-name property-name
+ :class-name (g-type-name object-type)))
+ (foreign-slot-value param-spec 'g-param-spec :value-type))
(defun g-object-type-property-type (object-type property-name
&key assert-readable assert-writable)
(defun g-object-call-constructor (object-type args-names args-values
&optional args-types)
- (setf object-type (ensure-g-type object-type))
(unless args-types
(setf args-types
(mapcar (lambda (name)
for arg-type in args-types
for arg-g-type = (if arg-type (ensure-g-type arg-type) (g-object-type-property-type object-type arg-name))
for parameter = (mem-aref parameters 'g-parameter i)
- do (setf (foreign-slot-value parameter 'g-parameter 'name) arg-name)
- do (set-g-value (foreign-slot-value parameter 'g-parameter 'value)
+ do (setf (foreign-slot-value parameter 'g-parameter :name) arg-name)
+ do (set-g-value (foreign-slot-value parameter 'g-parameter :value)
arg-value arg-g-type
:zero-g-value t))
(unwind-protect
(loop
for i from 0 below args-count
for parameter = (mem-aref parameters 'g-parameter i)
- do (foreign-free
- (mem-ref (foreign-slot-pointer parameter 'g-parameter 'name)
- :pointer))
- do (g-value-unset
- (foreign-slot-pointer parameter 'g-parameter 'value)))))))
+ do (foreign-free (mem-ref (foreign-slot-pointer parameter 'g-parameter :name) :pointer))
+ do (g-value-unset (foreign-slot-pointer parameter 'g-parameter :value)))))))
(defun g-object-call-get-property (object property-name &optional property-type)
- (unless property-type
- (setf property-type
- (g-object-property-type object property-name :assert-readable t)))
+ (restart-case
+ (unless property-type
+ (setf property-type
+ (g-object-property-type object property-name :assert-readable t)))
+ (return-nil () (return-from g-object-call-get-property nil)))
(setf property-type (ensure-g-type property-type))
(with-foreign-object (value 'g-value)
(g-value-zero value)
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