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+ − 1 ;;; gtk-ffi.el --- Foreign function interface for the GTK object system
+ − 2
+ − 3 ;; Copyright (C) 2000 Free Software Foundation
+ − 4
+ − 5 ;; Maintainer: William Perry <wmperry@gnu.org>
+ − 6 ;; Keywords: extensions, dumped
+ − 7
+ − 8 ;; This file is part of XEmacs.
+ − 9
+ − 10 ;; XEmacs is free software; you can redistribute it and/or modify it
+ − 11 ;; under the terms of the GNU General Public License as published by
+ − 12 ;; the Free Software Foundation; either version 2, or (at your option)
+ − 13 ;; any later version.
+ − 14
+ − 15 ;; XEmacs is distributed in the hope that it will be useful, but
+ − 16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
+ − 17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ − 18 ;; General Public License for more details.
+ − 19
+ − 20 ;; You should have received a copy of the GNU General Public License
+ − 21 ;; along with XEmacs; see the file COPYING. If not, write to the Free
+ − 22 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ − 23 ;; 02111-1307, USA.
+ − 24
+ − 25 ;;; Synched up with: Not in FSF
+ − 26
+ − 27 ;;; Commentary:
+ − 28
+ − 29 ;; This file is dumped with XEmacs.
+ − 30
+ − 31 (defvar gtk-type-aliases '((GtkType . guint)
+ − 32 (GdkAtom . gulong)
+ − 33 (GdkBitmap . GdkWindow)
+ − 34 (time_t . guint)
+ − 35 (none . void)
+ − 36 (GdkDrawable . GdkWindow)
+ − 37 (GdkBitmap . GdkWindow)
+ − 38 (GdkPixmap . GdkWindow))
+ − 39 "An assoc list of aliases for commonly used GTK types that are not
+ − 40 really part of the object system.")
+ − 41
+ − 42 (defvar gtk-ffi-debug nil
+ − 43 "If non-nil, all functions defined wiht `gtk-import-function' will be checked
+ − 44 for missing marshallers.")
+ − 45
+ − 46 (defun gtk-ffi-check-function (func)
+ − 47 ;; We don't call gtk-main or gtk-main-quit because it thoroughly
+ − 48 ;; hoses us (locks up xemacs handling events, but no lisp).
+ − 49 (if (not (memq func '(gtk-main gtk-main-quit)))
+ − 50 (condition-case err
+ − 51 (funcall func)
+ − 52 (error
+ − 53 (case (car err)
+ − 54 (wrong-number-of-arguments nil)
+ − 55 (error
+ − 56 (if (string= "Could not locate marshaller function" (nth 1 err))
+ − 57 (progn
+ − 58 (set-buffer (get-buffer-create "needed marshallers"))
+ − 59 (display-buffer (current-buffer))
+ − 60 (goto-char (point-max))
+ − 61 (insert
+ − 62 (format "%S\n"
+ − 63 (split-string
+ − 64 (substring (nth 2 err) (length "emacs_gtk_marshal_")) "_+")))))))))))
+ − 65
+ − 66 (defmacro gtk-import-function (retval name &rest args)
+ − 67 (if (symbolp name)
+ − 68 (setq name (symbol-name name)))
+ − 69 (let ((lisp-name (intern (replace-in-string name "_" "-")))
+ − 70 (doc-string nil))
+ − 71 (setq retval (or (cdr-safe (assoc retval gtk-type-aliases)) retval)
+ − 72 doc-string (concat "The lisp version of " name ".\n"
+ − 73 (if args
+ − 74 (concat "Prototype: " (prin1-to-string args)))))
+ − 75
+ − 76 ;; Drop off any naming of arguments, etc.
+ − 77 (if (and args (consp (car args)))
+ − 78 (setq args (mapcar 'car args)))
+ − 79
+ − 80 ;; Get rid of any type aliases.
+ − 81 (setq args (mapcar (lambda (x)
+ − 82 (or (cdr-safe (assoc x gtk-type-aliases)) x)) args))
+ − 83
+ − 84 `(progn
+ − 85 (defun ,lisp-name (&rest args)
+ − 86 ,doc-string
+ − 87 (if (not (get (quote ,lisp-name) 'gtk-ffi nil))
+ − 88 (put (quote ,lisp-name) 'gtk-ffi
+ − 89 (gtk-import-function-internal (quote ,retval) ,name
+ − 90 (quote ,args))))
+ − 91 (gtk-call-function (get (quote ,lisp-name) 'gtk-ffi 'ignore) args))
+ − 92 (and gtk-ffi-debug (gtk-ffi-check-function (quote ,lisp-name))))))
+ − 93
+ − 94 (defmacro gtk-import-variable (type name)
+ − 95 (if (symbolp name) (setq name (symbol-name name)))
+ − 96 (let ((lisp-name (intern (replace-in-string name "_" "-")))
+ − 97 (doc-string nil))
+ − 98 (setq type (or (cdr-safe (assoc type gtk-type-aliases)) type)
+ − 99 doc-string (concat "Retrieve the variable " name " (type: " (symbol-name type) ").\n"))
+ − 100 `(defun ,lisp-name ()
+ − 101 ,doc-string
+ − 102 (gtk-import-variable-internal (quote ,type) ,name))))
+ − 103
+ − 104 (provide 'gtk-ffi)