(in-package :gobject)
+(defun g-type-from-object (object)
+ "Returns the GType of an @code{object}
+
+@arg[object]{C pointer to an object}
+@return{GType designator (see @class{g-type-designator})}"
+ (g-type-from-instance object))
+
+(defun g-type-from-class (g-class)
+ (g-type-name (foreign-slot-value g-class 'g-type-class :type)))
+
+(defun g-type-from-instance (type-instance)
+ (g-type-from-class (foreign-slot-value type-instance 'g-type-instance :class)))
+
+(defun g-type-from-interface (type-interface)
+ (g-type-name (foreign-slot-value type-interface 'g-type-interface :type)))
+
(defclass g-object ()
((pointer
:type cffi:foreign-pointer
(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))
(cond
((null object)
(null-pointer))
+ ((pointerp object) object)
((null (pointer object))
(error "Object ~A has been disposed" object))
((typep object 'g-object)
nil
"Object ~A is not a subtype of ~A" object (sub-type type))
(pointer object))
- ((pointerp object) object)
(t (error "Object ~A is not translatable as GObject*" object))))
(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-name in args-names
for arg-value in args-values
for arg-type in args-types
- for arg-g-type = (ensure-g-type arg-type)
+ 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)
(unwind-protect
(g-object-set-property (ensure-object-pointer object)
property-name value)
- (g-value-unset value))))
\ No newline at end of file
+ (g-value-unset value))))
+
+(defmethod parse-gvalue-for-type (gvalue-ptr (type-numeric (eql +g-type-object+)))
+ (parse-gvalue-object gvalue-ptr))
+
+(defmethod parse-gvalue-for-type (gvalue-ptr (type-numeric (eql +g-type-interface+)))
+ (parse-gvalue-object gvalue-ptr))
+
+(defmethod set-gvalue-for-type (gvalue-ptr (type-numeric (eql +g-type-object+)) value)
+ (set-gvalue-object gvalue-ptr value))
+
+(defmethod set-gvalue-for-type (gvalue-ptr (type-numeric (eql +g-type-interface+)) value)
+ (set-gvalue-object gvalue-ptr value))
+
+(defun emit-signal (object signal-name &rest args)
+ "Emits the signal.
+@arg[object]{an instance of @class{g-object}. Signal is emitted on this object}
+@arg[signal-name]{a string specifying the signal}
+@arg[args]{arguments for the signal}
+@return{none}"
+ (let* ((object-type (g-type-from-object (pointer object)))
+ (signal-info (parse-signal-name object-type signal-name)))
+ (unless signal-info
+ (error "Signal ~A not found on object ~A" signal-name object))
+ (let ((params-count (length (signal-info-param-types signal-info))))
+ (with-foreign-object (params 'g-value (1+ params-count))
+ (set-g-value (mem-aref params 'g-value 0) object object-type :zero-g-value t)
+ (iter (for i from 0 below params-count)
+ (for arg in args)
+ (for type in (signal-info-param-types signal-info))
+ (set-g-value (mem-aref params 'g-value (1+ i)) arg type :zero-g-value t))
+ (prog1
+ (if (= (g-type-numeric (signal-info-return-type signal-info)) +g-type-void+)
+ (g-signal-emitv params (signal-info-id signal-info) signal-name (null-pointer))
+ (with-foreign-object (return-value 'g-value)
+ (g-value-zero return-value)
+ (g-value-init return-value (signal-info-return-type signal-info))
+ (prog1 (parse-gvalue return-value)
+ (g-value-unset return-value))))
+ (iter (for i from 0 below (1+ params-count))
+ (g-value-unset (mem-aref params 'g-value i))))))))
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