(instance :pointer)
(detailed-signal :string)
(closure (:pointer g-closure))
- (after :boolean))
\ No newline at end of file
+ (after :boolean))
+
+(defcfun g-signal-emitv :void
+ (instance-and-params (:pointer g-value))
+ (signal-id :uint)
+ (detail g-quark)
+ (return-value (:pointer g-value)))
+
+(defcfun g-signal-lookup :uint
+ (name :string)
+ (type g-type))
+
+(defbitfield g-signal-flags
+ :run-first :run-last :run-cleanup :no-recurse :detailed :action :no-hooks)
+
+(defcstruct g-signal-query
+ (signal-id :uint)
+ (signal-name :string)
+ (owner-type g-type)
+ (signal-flags g-signal-flags)
+ (return-type g-type)
+ (n-params :uint)
+ (param-types (:pointer g-type)))
+
+(defcfun g-signal-query :void
+ (signal-id :uint)
+ (query (:pointer g-signal-query)))
+
+(defun unmangle-type (type)
+ (logxor type (ldb (byte 1 0) type)));;subtract the G_SIGNAL_TYPE_STATIC_SCOPE
+
+(defun emit-signal (object signal-name &rest args)
+ (let ((signal-id (g-signal-lookup signal-name (g-type-from-object (pointer object)))))
+ (when (= signal-id 0)
+ (error "Signal ~A not found on object ~A" signal-name object))
+ (with-foreign-object (q 'g-signal-query)
+ (g-signal-query signal-id q)
+ (with-foreign-object (params 'g-value (+ 1 (foreign-slot-value q 'g-signal-query 'n-params)))
+ (set-g-value (mem-aref params 'g-value 0) object (g-type-from-object (pointer object)) :zero-g-value t)
+ (iter (for i from 0 below (foreign-slot-value q 'g-signal-query 'n-params))
+ (for arg in args)
+ (for type = (unmangle-type (mem-aref (foreign-slot-value q 'g-signal-query 'param-types) 'g-type i)))
+ (set-g-value (mem-aref params 'g-value (1+ i)) arg type :zero-g-value t))
+ (prog1
+ (if (= (foreign-slot-value q 'g-signal-query 'return-type) +g-type-void+)
+ (g-signal-emitv params signal-id signal-name (null-pointer))
+ (with-foreign-object (return-value 'g-value)
+ (g-value-zero return-value)
+ (g-value-init return-value (foreign-slot-value q 'g-signal-query 'return-type))
+ (prog1 (parse-gvalue return-value)
+ (g-value-unset return-value))))
+ (iter (for i from 0 below (foreign-slot-value q 'g-signal-query 'n-params))
+ (g-value-unset (mem-aref params 'g-value (1+ i)))))))))
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