--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lisp/device.el	Mon Aug 13 11:28:15 2007 +0200
@@ -0,0 +1,136 @@
+;;; device.el --- miscellaneous device functions not written in C
+
+;; Copyright (C) 1994-5, 1997 Free Software Foundation, Inc.
+;; Copyright (C) 1995, 1996 Ben Wing
+
+;; Maintainer: XEmacs Development Team
+;; Keywords: internal, 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, 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Synched up with: Not in FSF.
+
+;;; Commentary:
+
+;; This file is dumped with XEmacs.
+
+;;; Code:
+
+(defun device-list ()
+  "Return a list of all devices."
+  (apply 'nconc (mapcar 'console-device-list (console-list))))
+
+(defun device-type (&optional device)
+  "Return the type of the specified device (e.g. `x' or `tty').
+This is equivalent to the type of the device's console.
+Value is `tty' for a tty device (a character-only terminal),
+`x' for a device that is a screen on an X display,
+`ns' for a device that is a NeXTstep connection (not yet implemented),
+`mswindows' for a device that is a Windows or Windows NT connection,
+`pc' for a device that is a direct-write MS-DOS screen (not yet implemented),
+`stream' for a stream device (which acts like a stdio stream), and
+`dead' for a deleted device."
+  (or device (setq device (selected-device)))
+  (if (not (device-live-p device)) 'dead
+    (console-type (device-console device))))
+
+(defun make-tty-device (&optional tty terminal-type controlling-process)
+  "Create a new device on TTY.
+  TTY should be the name of a tty device file (e.g. \"/dev/ttyp3\" under
+SunOS et al.), as returned by the `tty' command.  A value of nil means
+use the stdin and stdout as passed to XEmacs from the shell.
+  If TERMINAL-TYPE is non-nil, it should be a string specifying the
+type of the terminal attached to the specified tty.  If it is nil,
+the terminal type will be inferred from the TERM environment variable.
+  If CONTROLLING-PROCESS is non-nil, it should be an integer
+specifying the process id of the process in control of the specified tty.  If
+it is nil, it is assumes to be the value returned by emacs-pid."
+  (make-device 'tty tty (list 'terminal-type terminal-type 
+			      'controlling-process controlling-process)))
+
+(defun device-pixel-width (&optional device)
+  "Return the width in pixels of DEVICE, or nil if unknown."
+  (let ((ds (device-system-metric device 'size-device)))
+    (and ds (car ds))))
+
+(defun device-pixel-height (&optional device)
+  "Return the height in pixels of DEVICE, or nil if unknown."
+  (let ((ds (device-system-metric device 'size-device)))
+    (and ds (cdr ds))))
+
+(defun device-mm-width (&optional device)
+  "Return the width in millimeters of DEVICE, or nil if unknown."
+  (let ((ds (device-system-metric device 'size-device-mm)))
+    (and ds (car ds))))
+
+(defun device-mm-height (&optional device)
+  "Return the height in millimeters of DEVICE, or nil if unknown."
+  (let ((ds (device-system-metric device 'size-device-mm)))
+    (and ds (cdr ds))))
+
+(defun device-bitplanes (&optional device)
+  "Return the number of bitplanes of DEVICE, or nil if unknown."
+  (device-system-metric device 'num-bit-planes))
+
+(defun device-color-cells (&optional device)
+  "Return the number of color cells of DEVICE, or nil if unknown."
+  (device-system-metric device 'num-color-cells))
+
+(defun make-x-device (&optional display)
+  "Create a new device connected to DISPLAY."
+  (make-device 'x display))
+
+(defun make-mswindows-device ()
+  "Create a new mswindows device."
+  (make-device 'mswindows nil))
+
+(defun device-on-window-system-p (&optional device)
+  "Return non-nil if DEVICE is on a window system.
+This generally means that there is support for the mouse, the menubar,
+the toolbar, glyphs, etc."
+  (or device (setq device (selected-device)))
+  (console-on-window-system-p (device-console device)))
+
+(defun call-device-method (name device &rest args)
+  "Call a DEVICE-specific function with the generic name NAME.
+If DEVICE is not provide the selected device is used."
+  (or device (setq device (selected-device)))
+  (or (symbolp name) (error "function name must be a symbol"))
+  (let ((devmeth (intern (concat (symbol-name 
+				  (device-type device)) "-" (symbol-name name)))))
+    (if (functionp devmeth)
+	(if args
+	    (apply devmeth args)
+	  (funcall devmeth))
+      nil)))
+
+(defmacro define-device-method (name &optional docstring)
+  "Define NAME to be a device method."
+  `(defun ,name (&rest arglist) ,docstring
+     (apply 'call-device-method (quote ,name) nil arglist)))
+
+(defmacro define-device-method* (name &optional docstring)
+  "Define NAME to be a device method."
+  `(defun* ,name (&rest arglist) ,docstring
+     (apply 'call-device-method (quote ,name) nil arglist)))
+
+(defalias 'valid-device-type-p 'valid-console-type-p)
+(defalias 'device-type-list 'console-type-list)
+(defalias 'device-pixel-depth 'device-bitplanes)
+
+;;; device.el ends here