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1 ;;; device.el --- miscellaneous device functions not written in C
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2
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3 ;;;; Copyright (C) 1994, 1995 Board of Trustees, University of Illinois
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4 ;;;; Copyright (C) 1995, 1996 Ben Wing
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5
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6 ;; Keywords: internal
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7
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8 ;; This file is part of XEmacs.
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9
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10 ;; XEmacs is free software; you can redistribute it and/or modify it
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11 ;; under the terms of the GNU General Public License as published by
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12 ;; the Free Software Foundation; either version 2, or (at your option)
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13 ;; any later version.
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14
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15 ;; XEmacs is distributed in the hope that it will be useful, but
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16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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18 ;; General Public License for more details.
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19
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20 ;; You should have received a copy of the GNU General Public License
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21 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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22 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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23
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24 ;;; Synched up with: Not in FSF.
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25
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26 (defun device-list ()
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27 "Return a list of all devices."
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28 (apply 'append (mapcar 'console-device-list (console-list))))
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29
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30 (defun device-type (&optional device)
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31 "Return the type of the specified device (e.g. `x' or `tty').
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32 This is equivalent to the type of the device's console.
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33 Value is `tty' for a tty device (a character-only terminal),
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34 `x' for a device that is a screen on an X display,
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35 `ns' for a device that is a NeXTstep connection (not yet implemeted),
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36 `win32' for a device that is a Windows or Windows NT connection (not yet
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37 implemented),
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38 `pc' for a device that is a direct-write MS-DOS screen (not yet implemented),
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39 `stream' for a stream device (which acts like a stdio stream), and
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40 `dead' for a deleted device."
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41 (or device (setq device (selected-device)))
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42 (if (not (device-live-p device)) 'dead
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43 (console-type (device-console device))))
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44
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45 (defun make-tty-device (&optional tty terminal-type)
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46 "Create a new device on TTY.
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47 TTY should be the name of a tty device file (e.g. \"/dev/ttyp3\" under
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48 SunOS et al.), as returned by the `tty' command. A value of nil means
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49 use the stdin and stdout as passed to XEmacs from the shell.
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50 If TERMINAL-TYPE is non-nil, it should be a string specifying the
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51 type of the terminal attached to the specified tty. If it is nil,
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52 the terminal type will be inferred from the TERM environment variable."
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53 (make-device 'tty tty (list 'terminal-type terminal-type)))
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54
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55 (defun make-x-device (&optional display)
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56 "Create a new device connected to DISPLAY."
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57 (make-device 'x display))
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58
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59 (defun device-on-window-system-p (&optional device)
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60 "Return non-nil if DEVICE is on a window system.
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61 This generally means that there is support for the mouse, the menubar,
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62 the toolbar, glyphs, etc."
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63 (or device (setq device (selected-device)))
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64 (console-on-window-system-p (device-console device)))
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65
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66 (defalias 'valid-device-type-p 'valid-console-type-p)
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67 (defalias 'device-type-list 'console-type-list)
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