1 ;;; devices.el -- XEmacs device API emulation
2 ;; Author: $Author: wmperry $
3 ;; Created: $Date: 2002/02/01 17:42:48 $
4 ;; Version: $Revision: 1.4 $
7 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
8 ;;; Copyright (c) 1996 by William M. Perry <wmperry@cs.indiana.edu>
9 ;;; Copyright (c) 1996 - 1999 Free Software Foundation, Inc.
11 ;;; This file is part of GNU Emacs.
13 ;;; GNU Emacs is free software; you can redistribute it and/or modify
14 ;;; it under the terms of the GNU General Public License as published by
15 ;;; the Free Software Foundation; either version 2, or (at your option)
16 ;;; any later version.
18 ;;; GNU Emacs is distributed in the hope that it will be useful,
19 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
20 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 ;;; GNU General Public License for more details.
23 ;;; You should have received a copy of the GNU General Public License
24 ;;; along with GNU Emacs; see the file COPYING. If not, write to the
25 ;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
26 ;;; Boston, MA 02111-1307, USA.
28 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
30 ;; This is a complete implementation of all the device-* functions found in
31 ;; XEmacs 19.14. A 'device' for Emacs 19 is just a frame, from which we can
32 ;; determine the connection to an X display, etc.
36 (when (featurep 'xemacs)
37 (set 'byte-optimize nil)))
39 (when (not (featurep 'xemacs))
40 (defalias 'selected-device 'ignore)
41 (defalias 'device-or-frame-p 'framep)
42 (defalias 'device-console 'ignore)
43 (defalias 'device-sound-enabled-p 'ignore)
44 (defalias 'device-live-p 'frame-live-p)
45 (defalias 'devicep 'framep)
46 (defalias 'frame-device 'identity)
47 (defalias 'redisplay-device 'redraw-frame)
48 (defalias 'redraw-device 'redraw-frame)
49 (defalias 'select-device 'select-frame)
50 (defalias 'set-device-class 'ignore)
52 (defun make-device (type connection &optional props)
53 "Create a new device of type TYPE, attached to connection CONNECTION.
55 The valid values for CONNECTION are device-specific; however,
56 CONNECTION is generally a string. (Specifically, for X devices,
57 CONNECTION should be a display specification such as \"foo:0\", and
58 for TTY devices, CONNECTION should be the filename of a TTY device
59 file, such as \"/dev/ttyp4\", or nil to refer to XEmacs' standard
62 PROPS, if specified, should be a plist of properties controlling
65 If CONNECTION specifies an already-existing device connection, that
66 device is simply returned; no new device is created, and PROPS
69 ((and (eq type 'x) connection)
70 (make-frame-on-display connection props))
76 (error "Unsupported device-type: %s" type))))
78 (defun make-frame-on-device (type connection &optional props)
79 "Create a frame of type TYPE on CONNECTION.
80 TYPE should be a symbol naming the device type, i.e. one of
82 x An X display. CONNECTION should be a standard display string
83 such as \"unix:0\", or nil for the display specified on the
84 command line or in the DISPLAY environment variable. Only if
85 support for X was compiled into XEmacs.
86 tty A standard TTY connection or terminal. CONNECTION should be
87 a TTY device name such as \"/dev/ttyp2\" (as determined by
88 the Unix command `tty') or nil for XEmacs' standard input
89 and output (usually the TTY in which XEmacs started). Only
90 if support for TTY's was compiled into XEmacs.
91 ns A connection to a machine running the NeXTstep windowing
92 system. Not currently implemented.
93 win32 A connection to a machine running Microsoft Windows NT or
94 Windows 95. Not currently implemented.
95 pc A direct-write MS-DOS frame. Not currently implemented.
97 PROPS should be an plist of properties, as in the call to `make-frame'.
99 If a connection to CONNECTION already exists, it is reused; otherwise,
100 a new connection is opened."
101 (make-device type connection props))
103 (defun make-tty-device (&optional tty terminal-type)
104 "Create a new device on TTY.
105 TTY should be the name of a tty device file (e.g. \"/dev/ttyp3\" under
106 SunOS et al.), as returned by the `tty' command. A value of nil means
107 use the stdin and stdout as passed to XEmacs from the shell.
108 If TERMINAL-TYPE is non-nil, it should be a string specifying the
109 type of the terminal attached to the specified tty. If it is nil,
110 the terminal type will be inferred from the TERM environment variable."
111 (make-device 'tty tty (list 'terminal-type terminal-type)))
113 (defun make-x-device (&optional display)
114 (make-device 'x display))
116 (defun set-device-selected-frame (device frame)
117 "Set the selected frame of device object DEVICE to FRAME.
118 If DEVICE is nil, the selected device is used.
119 If DEVICE is the selected device, this makes FRAME the selected frame."
120 (select-frame frame))
122 (defun set-device-baud-rate (device rate)
123 "Set the output baud rate of DEVICE to RATE.
124 On most systems, changing this value will affect the amount of padding
125 and other strategic decisions made during redisplay."
126 (setq baud-rate rate))
128 (defun dfw-device (obj)
129 "Given a device, frame, or window, return the associated device.
130 Return nil otherwise."
139 (defun event-device (event)
140 "Return the device that EVENT occurred on.
141 This will be nil for some types of events (e.g. keyboard and eval events)."
142 (dfw-device (posn-window (event-start event))))
144 (defun device-connection (&optional device)
145 "Return the connection of the specified device.
146 DEVICE defaults to the selected device if omitted"
147 (or (cdr-safe (assq 'display (frame-parameters device))) "stdio"))
149 (defun find-device (connection &optional type)
150 "Look for an existing device attached to connection CONNECTION.
151 Return the device if found; otherwise, return nil.
153 If TYPE is specified, only return devices of that type; otherwise,
154 return devices of any type. (It is possible, although unlikely,
155 that two devices of different types could have the same connection
156 name; in such a case, the first device found is returned.)"
157 (let ((devices (device-list))
159 (while (and devices (not nil))
160 (if (equal connection (device-connection (car devices)))
161 (setq retval (car devices)))
162 (setq devices (cdr devices)))
165 (defalias 'get-device 'find-device)
167 (defmacro device-baud-rate (&optional device)
168 "Return the output baud rate of DEVICE."
171 (defun device-on-window-system-p (&optional device)
172 "Return non-nil if DEVICE is on a window system.
173 This generally means that there is support for the mouse, the menubar,
174 the toolbar, glyphs, etc."
175 (and (cdr-safe (assq 'display (frame-parameters device))) t))
177 (defun device-name (&optional device)
178 "Return the name of the specified device."
179 (or (cdr-safe (assq 'display (frame-parameters device))) "stdio"))
181 (defun device-frame-list (&optional device)
182 "Return a list of all frames on DEVICE.
183 If DEVICE is nil, the selected device will be used."
184 (let ((desired (device-connection device)))
185 (filtered-frame-list (function (lambda (x) (equal (device-connection x)
187 (defun device-list ()
188 "Return a list of all devices"
193 (not-heard (frame-list)))
195 (setq cur (car not-heard)
196 conn (device-connection cur)
197 not-heard (cdr not-heard))
198 (if (member conn seen)
200 (setq seen (cons conn seen) ; Whoo hoo, a new one!
201 retval (cons cur retval))))
204 (defvar delete-device-hook nil
205 "Function or functions to call when a device is deleted.
206 One argument, the to-be-deleted device.")
208 (defun delete-device (device &optional force)
209 "Delete DEVICE, permanently eliminating it from use.
210 Normally, you cannot delete the last non-minibuffer-only frame (you must
211 use `save-buffers-kill-emacs' or `kill-emacs'). However, if optional
212 second argument FORCE is non-nil, you can delete the last frame. (This
213 will automatically call `save-buffers-kill-emacs'.)"
214 (let ((frames (device-frame-list device)))
215 (run-hook-with-args 'delete-device-hook device)
217 (delete-frame (car frames) force)
218 (setq frames (cdr frames)))))
220 (defun device-color-cells (&optional device)
222 ((x win32 w32 pm) (x-display-color-cells device))
225 (defun device-pixel-width (&optional device)
227 ((x win32 w32 pm) (x-display-pixel-width device))
228 (otherwise (frame-width device))))
230 (defun device-pixel-height (&optional device)
232 ((x win32 w32 pm) (x-display-pixel-height device))
233 (otherwise (frame-height device))))
235 (defun device-mm-width (&optional device)
237 ((x win32 w32 pm) (x-display-mm-width device))
240 (defun device-mm-height (&optional device)
242 ((x win32 w32 pm) (x-display-mm-height device))
245 (defun device-bitplanes (&optional device)
247 ((x win32 w32 pm) (x-display-planes device))
250 (defun device-class (&optional device)
251 (if (fboundp 'display-color-p)
252 (if (display-color-p device)
254 (if (display-grayscale-p device)
260 ((fboundp 'x-display-visual-class)
261 (let ((val (symbol-name (x-display-visual-class device))))
263 ((string-match "color" val) 'color)
264 ((string-match "gray-scale" val) 'grayscale)
266 ((fboundp 'x-display-color-p)
267 (if (x-display-color-p device)
271 (pm ; OS/2 Presentation Manager
273 ((fboundp 'pm-display-visual-class)
274 (let ((val (symbol-name (pm-display-visual-class device))))
276 ((string-match "color" val) 'color)
277 ((string-match "gray-scale" val) 'grayscale)
279 ((fboundp 'pm-display-color-p)
280 (if (pm-display-color-p device)
284 (otherwise 'color))))
286 (defun device-class-list ()
287 "Returns a list of valid device classes."
288 (list 'color 'grayscale 'mono))
290 (defun valid-device-class-p (class)
291 "Given a CLASS, return t if it is valid.
292 Valid classes are 'color, 'grayscale, and 'mono."
293 (memq class (device-class-list)))
295 (defun device-or-frame-type (device-or-frame)
296 "Return the type (e.g. `x' or `tty') of DEVICE-OR-FRAME.
297 DEVICE-OR-FRAME should be a device or a frame object. See `device-type'
298 for a description of the possible types."
299 (or window-system 'tty))
301 (defun device-type (&optional device)
302 "Return the type of the specified device (e.g. `x' or `tty').
303 Value is `tty' for a tty device (a character-only terminal),
304 `x' for a device which is a connection to an X server,
305 'ns' for a device which is a connection to a NeXTStep dps server,
306 'win32' or 'w32' for a Windows-NT window,
307 'pm' for an OS/2 Presentation Manager window,
308 'intuition' for an Amiga screen"
309 (device-or-frame-type device))
311 (defun device-type-list ()
312 "Return a list of valid console types."
314 (list window-system 'tty)
317 (defun valid-device-type-p (type)
318 "Given a TYPE, return t if it is valid."
319 (memq type (device-type-list)))
321 ) ; This closes the conditional on whether we are in XEmacs or not
326 (when (featurep 'xemacs)
327 (set 'byte-optimize t)))