| 1 | ;; Common Lisp bindings for GTK+ v2.0 |
| 2 | ;; Copyright (C) 2001 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: gboxed.lisp,v 1.10 2004-10-27 14:58:59 espen Exp $ |
| 19 | |
| 20 | (in-package "GLIB") |
| 21 | |
| 22 | |
| 23 | (eval-when (:compile-toplevel :load-toplevel :execute) |
| 24 | (init-types-in-library "libgobject-2.0.so") |
| 25 | (defclass boxed (proxy) |
| 26 | () |
| 27 | (:metaclass proxy-class) |
| 28 | (:copy %boxed-copy) |
| 29 | (:free %boxed-free))) |
| 30 | |
| 31 | (defbinding %boxed-copy (type location) pointer |
| 32 | ((find-type-number type) type-number) |
| 33 | (location pointer)) |
| 34 | |
| 35 | (defbinding %boxed-free (type location) nil |
| 36 | ((find-type-number type) type-number) |
| 37 | (location pointer)) |
| 38 | |
| 39 | |
| 40 | ;;;; Metaclass for boxed classes |
| 41 | |
| 42 | (eval-when (:compile-toplevel :load-toplevel :execute) |
| 43 | (defclass boxed-class (proxy-class) |
| 44 | ()) |
| 45 | |
| 46 | |
| 47 | (defmethod shared-initialize ((class boxed-class) names |
| 48 | &rest initargs &key name alien-name) |
| 49 | (declare (ignore initargs names)) |
| 50 | (call-next-method) |
| 51 | |
| 52 | (let* ((class-name (or name (class-name class))) |
| 53 | (type-number |
| 54 | (find-type-number |
| 55 | (or (first alien-name) (default-alien-type-name class-name))))) |
| 56 | (register-type class-name type-number))) |
| 57 | |
| 58 | |
| 59 | (defmethod validate-superclass |
| 60 | ((class boxed-class) (super pcl::standard-class)) |
| 61 | (subtypep (class-name super) 'boxed))) |
| 62 | |
| 63 | |
| 64 | ;;;; |
| 65 | |
| 66 | (defun expand-boxed-type (type-number &optional slots) |
| 67 | `(defclass ,(type-from-number type-number) (boxed) |
| 68 | ,slots |
| 69 | (:metaclass boxed-class) |
| 70 | (:alien-name ,(find-type-name type-number)))) |
| 71 | |
| 72 | (register-derivable-type 'boxed "GBoxed" 'expand-boxed-type) |
| 73 | |
| 74 | ;;;; Special boxed types |
| 75 | |
| 76 | (defclass gstring (boxed) |
| 77 | () |
| 78 | (:metaclass boxed-class) |
| 79 | (:alien-name "GString")) |
| 80 | |
| 81 | (deftype-method translate-from-alien |
| 82 | gstring (type-spec location &optional weak-ref) |
| 83 | `(let ((location ,location)) |
| 84 | (unless (null-pointer-p location) |
| 85 | (prog1 |
| 86 | (c-call::%naturalize-c-string location) |
| 87 | ,(unless weak-ref |
| 88 | (unreference-alien type-spec location)))))) |
| 89 | |
| 90 | (deftype-method translate-to-alien |
| 91 | gstring (type-spec string &optional weak-ref) |
| 92 | (declare (ignore weak-ref)) |
| 93 | `(let ((string ,string)) |
| 94 | ;; Always copy strings to prevent seg fault due to GC |
| 95 | (funcall |
| 96 | ',(proxy-class-copy (find-class type-spec)) |
| 97 | ',type-spec |
| 98 | (make-pointer (1+ (kernel:get-lisp-obj-address string)))))) |
| 99 | |
| 100 | (deftype-method cleanup-alien gstring (type-spec c-string &optional weak-ref) |
| 101 | (when weak-ref |
| 102 | (unreference-alien type-spec c-string))) |
| 103 | |