| 1 | ;; Common Lisp bindings for GTK+ v2.0 |
| 2 | ;; Copyright (C) 2000 Espen S. Johnsen <esj@stud.cs.uit.no> |
| 3 | ;; |
| 4 | ;; This library is free software; you can redistribute it and/or |
| 5 | ;; modify it under the terms of the GNU Lesser General Public |
| 6 | ;; License as published by the Free Software Foundation; either |
| 7 | ;; version 2 of the License, or (at your option) any later version. |
| 8 | ;; |
| 9 | ;; This library is distributed in the hope that it will be useful, |
| 10 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | ;; Lesser General Public License for more details. |
| 13 | ;; |
| 14 | ;; You should have received a copy of the GNU Lesser General Public |
| 15 | ;; License along with this library; if not, write to the Free Software |
| 16 | ;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 17 | |
| 18 | ;; $Id: gcallback.lisp,v 1.3 2001-05-11 16:08:52 espen Exp $ |
| 19 | |
| 20 | (in-package "GLIB") |
| 21 | |
| 22 | (use-prefix "g") |
| 23 | |
| 24 | |
| 25 | ;;;; Closures |
| 26 | |
| 27 | (deftype gclosure () 'pointer) |
| 28 | |
| 29 | (defbinding lisp-callback-closure-new () gclosure |
| 30 | (callback-id unsigned-int)) |
| 31 | |
| 32 | |
| 33 | |
| 34 | ;;;; Callback mechanism |
| 35 | |
| 36 | (defun register-callback-function (function) |
| 37 | (check-type function (or null symbol function)) |
| 38 | (lisp-callback-closure-new (register-user-data function))) |
| 39 | |
| 40 | (defun callback-trampoline (callback-id params return-value) |
| 41 | (let* ((return-type (unless (null-pointer-p return-value) |
| 42 | (type-from-number (gvalue-type return-value)))) |
| 43 | (args nil) |
| 44 | (callback-function (find-user-data callback-id))) |
| 45 | |
| 46 | (destructuring-bind (nparams . param-values) params |
| 47 | (dotimes (n nparams) |
| 48 | (push (gvalue-get (sap+ param-values (* n +gvalue-size+))) args))) |
| 49 | |
| 50 | (labels ((invoke-callback () |
| 51 | (restart-case |
| 52 | (unwind-protect |
| 53 | (let ((result (apply callback-function args))) |
| 54 | (when return-type |
| 55 | (gvalue-set return-value result)))) |
| 56 | |
| 57 | (continue nil :report "Return from callback function" |
| 58 | (when return-type |
| 59 | (format |
| 60 | *query-io* |
| 61 | "Enter return value of type ~S: " |
| 62 | return-type) |
| 63 | (force-output *query-io*) |
| 64 | (gvalue-set return-value (eval (read *query-io*))))) |
| 65 | (re-invoke nil :report "Re-invoke callback function" |
| 66 | (invoke-callback))))) |
| 67 | (invoke-callback)))) |
| 68 | |
| 69 | (defun after-gc-hook () |
| 70 | (setf |
| 71 | (extern-alien "callback_trampoline" system-area-pointer) |
| 72 | (make-pointer (kernel:get-lisp-obj-address #'callback-trampoline)) |
| 73 | (extern-alien "destroy_user_data" system-area-pointer) |
| 74 | (make-pointer (kernel:get-lisp-obj-address #'destroy-user-data)))) |
| 75 | |
| 76 | (pushnew 'after-gc-hook ext:*after-gc-hooks*) |
| 77 | (after-gc-hook) |
| 78 | |
| 79 | |
| 80 | |
| 81 | ;;;; Signals |
| 82 | |
| 83 | (defun signal-name-to-string (name) |
| 84 | (substitute #\_ #\- (string-downcase (string name)))) |
| 85 | |
| 86 | (defbinding signal-lookup (name itype) unsigned-int |
| 87 | ((signal-name-to-string name) string) |
| 88 | (itype type-number)) |
| 89 | |
| 90 | (defbinding signal-name () string |
| 91 | (signal-id unsigned-int)) |
| 92 | |
| 93 | (defun ensure-signal-id (signal-id instance) |
| 94 | (etypecase signal-id |
| 95 | (integer signal-id) |
| 96 | (string (signal-lookup signal-id (type-number-of instance))) |
| 97 | (symbol (signal-lookup signal-id (type-number-of instance))))) |
| 98 | |
| 99 | (defbinding signal-stop-emission (instance signal-id) nil |
| 100 | (instance ginstance) |
| 101 | ((ensure-signal-id signal-id instance) unsigned-int)) |
| 102 | |
| 103 | ; (defbinding (signal-add-emisson-hook "g_signal_add_emission_hook_full") |
| 104 | ; () unsigned-int |
| 105 | ; (signal-id unsigned-int) |
| 106 | ; (closure gclosure)) |
| 107 | |
| 108 | ; (defbinding signal-remove-emisson-hook () nil |
| 109 | ; (signal-id unsigned-int) |
| 110 | ; (hook-id unsigned-int)) |
| 111 | |
| 112 | (defbinding (signal-has-handler-pending-p "g_signal_has_handler_pending") |
| 113 | (instance signal-id &key detail blocked) boolean |
| 114 | (instance ginstance) |
| 115 | ((ensure-signal-id signal-id instance) unsigned-int) |
| 116 | ((or detail 0) quark) |
| 117 | (blocked boolean)) |
| 118 | |
| 119 | (defbinding (signal-connect-closure "g_signal_connect_closure_by_id") |
| 120 | (instance signal-id closure &key detail after) unsigned-int |
| 121 | (instance ginstance) |
| 122 | ((ensure-signal-id signal-id instance) unsigned-int) |
| 123 | ((or detail 0) quark) |
| 124 | (closure gclosure) |
| 125 | (after boolean)) |
| 126 | |
| 127 | (defbinding signal-handler-block () nil |
| 128 | (instance ginstance) |
| 129 | (handler unsigned-int)) |
| 130 | |
| 131 | (defbinding signal-handler-unblock () nil |
| 132 | (instance ginstance) |
| 133 | (handler unsigned-int)) |
| 134 | |
| 135 | (defbinding signal-handler-disconnect () nil |
| 136 | (instance ginstance) |
| 137 | (handler unsigned-int)) |
| 138 | |
| 139 | |
| 140 | (defun signal-connect (instance signal function &key after object) |
| 141 | (let ((callback |
| 142 | (cond |
| 143 | ((or (eq object t) (eq object instance)) function) |
| 144 | ((not object) |
| 145 | #'(lambda (&rest args) (apply function (cdr args)))) |
| 146 | (t |
| 147 | #'(lambda (&rest args) (apply function object (rest args))))))) |
| 148 | |
| 149 | (signal-connect-closure |
| 150 | instance signal (register-callback-function callback) :after after))) |