;; License along with this library; if not, write to the Free Software
;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-;; $Id: gcallback.lisp,v 1.14 2004-11-07 16:04:21 espen Exp $
+;; $Id: gcallback.lisp,v 1.23 2005-03-06 17:18:00 espen Exp $
(in-package "GLIB")
(use-prefix "g")
-;;;; Callback mechanism
-
-(deftype gclosure () 'pointer)
-
-(defbinding (callback-closure-new "clg_callback_closure_new") () gclosure
- (callback-id unsigned-int)
- (callback pointer)
- (destroy-notify pointer))
+;;;; Callback invokation
(defun register-callback-function (function)
(check-type function (or null symbol function))
(register-user-data function))
-(defcallback closure-callback-marshal (nil
- (gclosure pointer)
- (return-value gvalue)
- (n-params unsigned-int)
- (param-values pointer)
- (invocation-hint pointer)
- (callback-id unsigned-int))
+;; Callback marshal for regular signal handlers
+(defcallback closure-marshal (nil
+ (gclosure pointer)
+ (return-value gvalue)
+ (n-params unsigned-int)
+ (param-values pointer)
+ (invocation-hint pointer)
+ (callback-id unsigned-int))
+ (declare (ignore gclosure invocation-hint))
(callback-trampoline callback-id n-params param-values return-value))
-(defcallback %destroy-user-data (nil (id unsigned-int))
- (destroy-user-data id))
-
-(defun make-callback-closure (function)
- (callback-closure-new
- (register-callback-function function)
- (callback closure-callback-marshal) (callback %destroy-user-data)))
-
+;; Callback function for emission hooks
+(defcallback signal-emission-hook (nil
+ (invocation-hint pointer)
+ (n-params unsigned-int)
+ (param-values pointer)
+ (callback-id unsigned-int))
+ (callback-trampoline callback-id n-params param-values))
-(defun callback-trampoline (callback-id n-params param-values return-value)
+(defun callback-trampoline (callback-id n-params param-values &optional
+ (return-value (make-pointer 0)))
(let* ((return-type (unless (null-pointer-p return-value)
(gvalue-type return-value)))
(args (loop
(when return-type
(gvalue-set return-value result)))))
-
(defun invoke-callback (callback-id return-type &rest args)
(restart-case
(apply (find-user-data callback-id) args)
;;;; Timeouts and idle functions
+(defconstant +priority-high+ -100)
+(defconstant +priority-default+ 0)
+(defconstant +priority-high-idle+ 100)
+(defconstant +priority-default-idle+ 200)
+(defconstant +priority-low+ 300)
+
+(defbinding source-remove () boolean
+ (tag unsigned-int))
+
(defcallback source-callback-marshal (nil (callback-id unsigned-int))
- (callback-trampoline callback-id 0 nil (make-pointer 0)))
+ (callback-trampoline callback-id 0 nil))
(defbinding (timeout-add "g_timeout_add_full")
- (function interval &optional (priority 0)) unsigned-int
+ (interval function &optional (priority +priority-default+)) unsigned-int
(priority int)
(interval unsigned-int)
- (*source-callback-marshal* pointer)
+ ((callback source-callback-marshal) pointer)
((register-callback-function function) unsigned-long)
- ((callback %destroy-user-data) pointer))
+ ((callback user-data-destroy-func) pointer))
+
+(defun timeout-remove (timeout)
+ (source-remove timeout))
(defbinding (idle-add "g_idle_add_full")
- (function &optional (priority 0)) unsigned-int
+ (function &optional (priority +priority-default-idle+)) unsigned-int
(priority int)
- (*source-callback-marshal* pointer)
+ ((callback source-callback-marshal) pointer)
((register-callback-function function) unsigned-long)
- ((callback %destroy-user-data) pointer))
+ ((callback user-data-destroy-func) pointer))
+(defun idle-remove (idle)
+ (source-remove idle))
-;;;; Signals
+;;;; Signal information querying
-(defbinding signal-lookup (name itype) unsigned-int
+(defbinding signal-lookup (name type) unsigned-int
((signal-name-to-string name) string)
- (itype type-number))
+ ((find-type-number type t) type-number))
-(defbinding signal-name () string
+(defbinding signal-name () (copy-of string)
(signal-id unsigned-int))
-(defun ensure-signal-id (signal-id instance)
+(defbinding signal-list-ids (type) (vector unsigned-int n-ids)
+ ((find-type-number type t) type-number)
+ (n-ids unsigned-int :out))
+
+(defun signal-list-names (type)
+ (map 'list #'signal-name (signal-list-ids type)))
+
+(defun ensure-signal-id-from-type (signal-id type)
(etypecase signal-id
- (integer signal-id)
- (string (signal-lookup signal-id (type-number-of instance)))
- (symbol (signal-lookup signal-id (type-number-of instance)))))
+ (integer (if (signal-name signal-id)
+ signal-id
+ (error "Invalid signal id: ~D" signal-id)))
+ ((or symbol string)
+ (let ((numeric-id (signal-lookup signal-id type)))
+ (if (zerop numeric-id)
+ (error "Invalid signal name for ~S: ~D" type signal-id)
+ numeric-id)))))
+
+(defun ensure-signal-id (signal-id instance)
+ (ensure-signal-id-from-type signal-id (type-of instance)))
-(defbinding signal-stop-emission (instance signal-id) nil
+(eval-when (:compile-toplevel :load-toplevel :execute)
+ (deftype signal-flags ()
+ '(flags :run-first :run-last :run-cleanup :no-recurse
+ :detailed :action :no-hooks))
+
+ (defclass signal-query (struct)
+ ((id :allocation :alien :type unsigned-int)
+ (name :allocation :alien :type (copy-of string))
+ (type :allocation :alien :type type-number)
+ (flags :allocation :alien :type signal-flags)
+ (return-type :allocation :alien :type type-number)
+ (n-params :allocation :alien :type unsigned-int)
+ (param-types :allocation :alien :type pointer))
+ (:metaclass struct-class)))
+
+(defbinding signal-query
+ (signal-id &optional (signal-query (make-instance 'signal-query))) nil
+ (signal-id unsigned-int)
+ (signal-query signal-query :return))
+
+(defun signal-param-types (info)
+ (with-slots (n-params param-types) info
+ (map-c-vector 'list
+ #'(lambda (type-number)
+ (type-from-number type-number))
+ param-types 'type-number n-params)))
+
+
+(defun describe-signal (signal-id &optional type)
+ (let ((info (signal-query (ensure-signal-id-from-type signal-id type))))
+ (with-slots (id name type flags return-type n-params) info
+ (format t "The signal with id ~D is named '~A' and may be emitted on instances of type ~S~%~%" id name (type-from-number type t))
+ (format t "Signal handlers should return ~A and take ~A~%"
+ (cond
+ ((= return-type (find-type-number "void")) "no values")
+ ((not (type-from-number return-type)) "values of unknown type")
+ ((format nil "values of type ~S" (type-from-number return-type))))
+ (if (zerop n-params)
+ "no arguments"
+ (format nil "arguments with the following types: ~A"
+ (signal-param-types info)))))))
+
+
+;;;; Signal connecting and controlling
+
+(defbinding %signal-stop-emission () nil
(instance ginstance)
- ((ensure-signal-id signal-id instance) unsigned-int))
+ (signal-id unsigned-int)
+ (detail quark))
-; (defbinding (signal-add-emisson-hook "g_signal_add_emission_hook_full")
-; () unsigned-int
-; (signal-id unsigned-int)
-; (closure gclosure))
+(defvar *signal-stop-emission* nil)
+(declaim (special *signal-stop-emission*))
+
+(defun signal-stop-emission ()
+ (if *signal-stop-emission*
+ (funcall *signal-stop-emission*)
+ (error "Not inside a signal handler")))
+
+
+(defbinding signal-add-emission-hook (type signal function &key (detail 0))
+ unsigned-int
+ ((ensure-signal-id-from-type signal type) unsigned-int)
+ (detail quark)
+ ((callback signal-emission-hook) pointer)
+ ((register-callback-function function) unsigned-int)
+ ((callback user-data-destroy-func) pointer))
+
+(defbinding signal-remove-emission-hook (type signal hook-id) nil
+ ((ensure-signal-id-from-type signal type) unsigned-int)
+ (hook-id unsigned-int))
-; (defbinding signal-remove-emisson-hook () nil
-; (signal-id unsigned-int)
-; (hook-id unsigned-int))
(defbinding (signal-has-handler-pending-p "g_signal_has_handler_pending")
(instance signal-id &key detail blocked) boolean
((or detail 0) quark)
(blocked boolean))
-(defbinding (signal-connect-closure "g_signal_connect_closure_by_id")
- (instance signal-id closure &key detail after) unsigned-int
+(defbinding %signal-connect-closure-by-id () unsigned-int
(instance ginstance)
- ((ensure-signal-id signal-id instance) unsigned-int)
- ((or detail 0) quark)
- (closure gclosure)
+ (signal-id unsigned-int)
+ (detail quark)
+ (closure pointer)
(after boolean))
(defbinding signal-handler-block () nil
(instance ginstance)
- (handler unsigned-int))
+ (handler-id unsigned-int))
(defbinding signal-handler-unblock () nil
(instance ginstance)
- (handler unsigned-int))
+ (handler-id unsigned-int))
(defbinding signal-handler-disconnect () nil
(instance ginstance)
- (handler unsigned-int))
-
-
-(defmethod signal-connect ((gobject gobject) signal function &key after object)
-"Connects a callback function to a signal for a particular object. If :OBJECT
- is T, the object connected to is passed as the first argument to the callback
- function, or if :OBJECT is any other non NIL value, it is passed as the first
- argument instead. If :AFTER is non NIL, the handler will be called after the
- default handler of the signal."
- (let ((callback-id
- (make-callback-closure
- (cond
- ((or (eq object t) (eq object gobject)) function)
- ((not object)
- #'(lambda (&rest args) (apply function (cdr args))))
- (t
- #'(lambda (&rest args) (apply function object (rest args))))))))
- (signal-connect-closure gobject signal callback-id :after after)))
+ (handler-id unsigned-int))
+(defbinding signal-handler-is-connected-p () boolean
+ (instance ginstance)
+ (handler-id unsigned-int))
-;;; Message logging
+(deftype gclosure () 'pointer)
-;; TODO: define and signal conditions based on log-level
-;(defun log-handler (domain log-level message)
-(def-callback log-handler (c-call:void (domain c-call:c-string)
- (log-level c-call:int)
- (message c-call:c-string))
- (error "~A: ~A" domain message))
+(defbinding (callback-closure-new "clg_callback_closure_new") () gclosure
+ (callback-id unsigned-int)
+ (callback pointer)
+ (destroy-notify pointer))
-(setf (extern-alien "log_handler" system-area-pointer) (callback log-handler))
+(defun make-callback-closure (function)
+ (let ((callback-id (register-callback-function function)))
+ (values
+ (callback-closure-new
+ callback-id (callback closure-marshal)
+ (callback user-data-destroy-func))
+ callback-id)))
+
+(defgeneric compute-signal-function (gobject signal function object))
+
+(defmethod compute-signal-function ((gobject gobject) signal function object)
+ (declare (ignore signal))
+ (cond
+ ((or (eq object t) (eq object gobject)) function)
+ ((not object)
+ #'(lambda (&rest args) (apply function (rest args))))
+ (t
+ #'(lambda (&rest args) (apply function object (rest args))))))
+
+
+(defgeneric compute-signal-id (gobject signal))
+
+(defmethod compute-signal-id ((gobject gobject) signal)
+ (ensure-signal-id signal gobject))
+
+
+(defgeneric signal-connect (gobject signal function &key detail after object remove))
+
+(defmethod signal-connect :around ((gobject gobject) signal function &rest args)
+ (declare (ignore gobject signal args))
+ (when function
+ (call-next-method)))
+
+
+(defmethod signal-connect ((gobject gobject) signal function
+ &key detail after object remove)
+"Connects a callback function to a signal for a particular object. If
+:OBJECT is T, the object connected to is passed as the first argument
+to the callback function, or if :OBJECT is any other non NIL value, it
+is passed as the first argument instead. If :AFTER is non NIL, the
+handler will be called after the default handler for the signal. If
+:REMOVE is non NIL, the handler will be removed after beeing invoked
+once."
+(let* ((signal-id (compute-signal-id gobject signal))
+ (detail-quark (if detail (quark-intern detail) 0))
+ (signal-stop-emission
+ #'(lambda ()
+ (%signal-stop-emission gobject signal-id detail-quark)))
+ (callback (compute-signal-function gobject signal function object))
+ (wrapper #'(lambda (&rest args)
+ (let ((*signal-stop-emission* signal-stop-emission))
+ (apply callback args)))))
+ (multiple-value-bind (closure-id callback-id)
+ (make-callback-closure wrapper)
+ (let ((handler-id (%signal-connect-closure-by-id
+ gobject signal-id detail-quark closure-id after)))
+ (when remove
+ (update-user-data callback-id
+ #'(lambda (&rest args)
+ (unwind-protect
+ (let ((*signal-stop-emission* signal-stop-emission))
+ (apply callback args))
+ (signal-handler-disconnect gobject handler-id)))))
+ handler-id))))
+
+
+;;;; Signal emission
+
+(defbinding %signal-emitv () nil
+ (gvalues pointer)
+ (signal-id unsigned-int)
+ (detail quark)
+ (return-value gvalue))
+
+(defvar *signal-emit-functions* (make-hash-table))
+
+(defun create-signal-emit-function (signal-id)
+ (let ((info (signal-query signal-id)))
+ (let* ((type (type-from-number (slot-value info 'type)))
+ (param-types (cons type (signal-param-types info)))
+ (return-type (type-from-number (slot-value info 'return-type)))
+ (n-params (1+ (slot-value info 'n-params)))
+ (params (allocate-memory (* n-params +gvalue-size+))))
+ #'(lambda (detail object &rest args)
+ (unless (= (length args) (1- n-params))
+ (error "Invalid number of arguments: ~A" (+ 2 (length args))))
+ (unwind-protect
+ (loop
+ for arg in (cons object args)
+ for type in param-types
+ as tmp = params then (sap+ tmp +gvalue-size+)
+ do (gvalue-init tmp type arg)
+ finally
+ (if return-type
+ (return
+ (with-gvalue (return-value)
+ (%signal-emitv params signal-id detail return-value)))
+ (%signal-emitv params signal-id detail (make-pointer 0))))
+ (loop
+ repeat n-params
+ as tmp = params then (sap+ tmp +gvalue-size+)
+ while (gvalue-p tmp)
+ do (gvalue-unset tmp)))))))
+
+(defun signal-emit-with-detail (object signal detail &rest args)
+ (let* ((signal-id (ensure-signal-id signal object))
+ (function (or
+ (gethash signal-id *signal-emit-functions*)
+ (setf
+ (gethash signal-id *signal-emit-functions*)
+ (create-signal-emit-function signal-id)))))
+ (apply function detail object args)))
+
+(defun signal-emit (object signal &rest args)
+ (apply #'signal-emit-with-detail object signal 0 args))
;;;; Convenient macros
(unwind-protect
(progn ,@body)
(destroy-user-data ,id))))
-
-
~mdw / clg / blobdiff