This commit was manufactured by cvs2svn to create branch 'chise-r21-4-18'.

[chise/xemacs-chise.git-] / lisp / gtk-ffi.el

diff --git a/lisp/gtk-ffi.el b/lisp/gtk-ffi.el
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+;;; gtk-ffi.el --- Foreign function interface for the GTK object system
+
+;; Copyright (C) 2000 Free Software Foundation
+
+;; Maintainer: William Perry <wmperry@gnu.org>
+;; Keywords: extensions, dumped
+
+;; This file is part of XEmacs.
+
+;; XEmacs is free software; you can redistribute it and/or modify it
+;; under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+
+;; XEmacs is distributed in the hope that it will be useful, but
+;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;; General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with XEmacs; see the file COPYING.  If not, write to the Free
+;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+;; 02111-1307, USA.
+
+;;; Synched up with: Not in FSF
+
+;;; Commentary:
+
+;; This file is dumped with XEmacs.
+
+(defvar gtk-type-aliases '((GtkType . guint)
+                          (GdkAtom . gulong)
+                          (GdkBitmap . GdkWindow)
+                          (time_t    . guint)
+                          (none      . void)
+                          (GdkDrawable . GdkWindow)
+                          (GdkBitmap . GdkWindow)
+                          (GdkPixmap . GdkWindow))
+  "An assoc list of aliases for commonly used GTK types that are not
+really part of the object system.")
+
+(defvar gtk-ffi-debug nil
+  "If non-nil, all functions defined wiht `gtk-import-function' will be checked
+for missing marshallers.")
+
+(defun gtk-ffi-check-function (func)
+  ;; We don't call gtk-main or gtk-main-quit because it thoroughly
+  ;; hoses us (locks up xemacs handling events, but no lisp).
+  (if (not (memq func '(gtk-main gtk-main-quit)))
+      (condition-case err
+         (funcall func)
+       (error
+        (case (car err)
+          (wrong-number-of-arguments nil)
+          (error
+           (if (string= "Could not locate marshaller function" (nth 1 err))
+               (progn
+                 (set-buffer (get-buffer-create "needed marshallers"))
+                 (display-buffer (current-buffer))
+                 (goto-char (point-max))
+                 (insert
+                  (format "%S\n"
+                          (split-string
+                           (substring (nth 2 err) (length "emacs_gtk_marshal_")) "_+")))))))))))
+
+(defmacro gtk-import-function (retval name &rest args)
+  (if (symbolp name)
+      (setq name (symbol-name name)))
+  (let ((lisp-name (intern (replace-in-string name "_" "-")))
+       (doc-string nil))
+    (setq retval (or (cdr-safe (assoc retval gtk-type-aliases)) retval)
+         doc-string (concat "The lisp version of " name ".\n"
+                            (if args
+                                (concat "Prototype: " (prin1-to-string args)))))
+
+    ;; Drop off any naming of arguments, etc.
+    (if (and args (consp (car args)))
+       (setq args (mapcar 'car args)))
+
+    ;; Get rid of any type aliases.
+    (setq args (mapcar (lambda (x)
+                        (or (cdr-safe (assoc x gtk-type-aliases)) x)) args))
+
+    `(progn
+       (defun ,lisp-name (&rest args)
+        ,doc-string
+        (if (not (get (quote ,lisp-name) 'gtk-ffi nil))
+            (put (quote ,lisp-name) 'gtk-ffi
+                 (gtk-import-function-internal (quote ,retval) ,name
+                                               (quote ,args))))
+        (gtk-call-function (get (quote ,lisp-name) 'gtk-ffi 'ignore) args))
+       (and gtk-ffi-debug (gtk-ffi-check-function (quote ,lisp-name))))))
+
+(defmacro gtk-import-variable (type name)
+  (if (symbolp name) (setq name (symbol-name name)))
+  (let ((lisp-name (intern (replace-in-string name "_" "-")))
+       (doc-string nil))
+    (setq type (or (cdr-safe (assoc type gtk-type-aliases)) type)
+         doc-string (concat "Retrieve the variable " name " (type: " (symbol-name type) ").\n"))
+    `(defun ,lisp-name ()
+       ,doc-string
+       (gtk-import-variable-internal (quote ,type) ,name))))
+
+(provide 'gtk-ffi)