X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=glib%2Fgobject.signals.lisp;h=46777c04999b6be77f7211adaa19bbfca87be001;hb=052b2e718c7c62711b383268ac69f308d0f59165;hp=1531f167cc0a554beb1557516714bf08dc25cb99;hpb=0d03b82a77743d2ea5ef69bea08735fa12857d92;p=cl-gtk2.git diff --git a/glib/gobject.signals.lisp b/glib/gobject.signals.lisp index 1531f16..46777c0 100644 --- a/glib/gobject.signals.lisp +++ b/glib/gobject.signals.lisp @@ -1,7 +1,134 @@ (in-package :gobject) -(defcfun g-signal-connect-closure :ulong - (instance :pointer) - (detailed-signal :string) - (closure (:pointer g-closure)) - (after :boolean)) \ No newline at end of file +;;; Signal handler closures + +(defcstruct lisp-signal-handler-closure + (:parent-instance g-closure) + (:object :pointer) + (:function-id :int)) + +(defun finalize-lisp-signal-handler-closure (closure) + (let* ((function-id (foreign-slot-value closure 'lisp-signal-handler-closure :function-id)) + (addr (pointer-address (foreign-slot-value closure 'lisp-signal-handler-closure :object))) + (object (or (gethash addr *foreign-gobjects-strong*) + (gethash addr *foreign-gobjects-weak*)))) + (when object + (delete-handler-from-object object function-id)))) + +(defcallback lisp-signal-handler-closure-finalize :void + ((data :pointer) (closure (:pointer lisp-signal-handler-closure))) + (declare (ignore data)) + (finalize-lisp-signal-handler-closure closure)) + +(defun call-with-restarts (fn args) + (restart-case + (apply fn args) + (return-from-g-closure (&optional v) :report "Return value from closure" v))) + +(defcallback lisp-signal-handler-closure-marshal :void + ((closure (:pointer lisp-signal-handler-closure)) + (return-value (:pointer g-value)) + (count-of-args :uint) + (args (:pointer g-value)) + (invocation-hint :pointer) + (marshal-data :pointer)) + (declare (ignore invocation-hint marshal-data)) + (let* ((args (parse-closure-arguments count-of-args args)) + (function-id (foreign-slot-value closure 'lisp-signal-handler-closure :function-id)) + (addr (pointer-address (foreign-slot-value closure 'lisp-signal-handler-closure :object))) + (object (or (gethash addr *foreign-gobjects-strong*) + (gethash addr *foreign-gobjects-weak*))) + (return-type (and (not (null-pointer-p return-value)) + (g-value-type return-value))) + (fn (retrieve-handler-from-object object function-id)) + (fn-result (call-with-restarts fn args))) + (when return-type + (set-g-value return-value fn-result return-type :g-value-init nil)))) + +(defun parse-closure-arguments (count-of-args args) + (loop + for i from 0 below count-of-args + collect (parse-g-value (mem-aref args 'g-value i)))) + +(defun create-signal-handler-closure (object fn) + (let ((function-id (save-handler-to-object object fn)) + (closure (g-closure-new-simple (foreign-type-size 'lisp-signal-handler-closure) (null-pointer)))) + (setf (foreign-slot-value closure 'lisp-signal-handler-closure :function-id) function-id + (foreign-slot-value closure 'lisp-signal-handler-closure :object) (pointer object)) + (g-closure-add-finalize-notifier closure (null-pointer) + (callback lisp-signal-handler-closure-finalize)) + (g-closure-set-marshal closure (callback lisp-signal-handler-closure-marshal)) + closure)) + +(defun find-free-signal-handler-id (object) + (iter (with handlers = (g-object-signal-handlers object)) + (for i from 0 below (length handlers)) + (finding i such-that (null (aref handlers i))))) + +(defun save-handler-to-object (object handler) + (assert handler) + (let ((id (find-free-signal-handler-id object)) + (handlers (g-object-signal-handlers object))) + (if id + (progn (setf (aref handlers id) handler) id) + (progn (vector-push-extend handler handlers) (1- (length handlers)))))) + +(defun retrieve-handler-from-object (object handler-id) + (aref (g-object-signal-handlers object) handler-id)) + +(defun delete-handler-from-object (object handler-id) + (let ((handlers (g-object-signal-handlers object))) + (setf (aref handlers handler-id) nil) + (iter (while (plusp (length handlers))) + (while (null (aref handlers (1- (length handlers))))) + (vector-pop handlers)) + nil)) + +(defun connect-signal (object signal handler &key after) + "Connects the function to a signal for a particular object. +If @code{after} is true, then the function will be called after the default handler of the signal. + +@arg[object]{an instance of @class{gobject}} +@arg[signal]{a string; names the signal} +@arg[handler]{a function; handles the signal. Number (and type) of arguments and return value type depends on the signal} +@arg[after]{a boolean}" + (g-signal-connect-closure (pointer object) + signal + (create-signal-handler-closure object handler) + after)) + +(defun g-signal-connect (object signal handler &key after) + "Deprecated alias for @fun{connect-signal}" + (connect-signal object signal handler :after after)) + +(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= (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-g-value 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)))))))) + +(defcfun (disconnect-signal "g_signal_handler_disconnect") :void + (object g-object) + (handler-id :ulong))