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- ;;; sysdep.el --- consolidate Emacs-version dependencies in one file.
-
- ;; Copyright (C) 1995 Ben Wing.
-
- ;; Author: Ben Wing <wing@666.com>
- ;; Keywords: lisp, tools
-
- ;; 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.
-
- ;; The purpose of this file is to eliminate the cruftiness that
- ;; would otherwise be required of packages that want to run on multiple
- ;; versions of Emacs. The idea is that we make it look like we're running
- ;; the latest version of XEmacs (currently 19.14) by emulating all the
- ;; missing functions.
-
- ;; #### This file does not currently do any advising but should.
- ;; Unfortunately, advice.el is a hugely big package. Is any such
- ;; thing as `advice-lite' possible?
-
- ;; #### - This package is great, but its role needs to be thought out a bit
- ;; more. Sysdep will not permit programs written for the old XEmacs API to
- ;; run on new versions of XEmacs. Sysdep is a backward-compatibility
- ;; package for the latest and greatest XEmacs API. It permits programmers
- ;; to use the latest XEmacs functionality and still have their programs run
- ;; on older versions of XEmacs...perhaps even on FSF Emacs. It should NEVER
- ;; ever need to be loaded in the newest XEmacs. It doesn't even make sense
- ;; to put it in the lisp/utils part of the XEmacs distribution because its
- ;; real purpose is to be distributed with packages like w3 which take
- ;; advantage of the latest and greatest features of XEmacs but still need to
- ;; be run on older versions. --Stig
-
- ;; Any packages that wish to use this file should load it using
- ;; `load-library'. It will not load itself if a version of sysdep.el
- ;; that is at least as recent has already been loaded, but will
- ;; load over an older version of sysdep.el. It will attempt to
- ;; not redefine functions that have already been custom-redefined,
- ;; but will redefine a function if the supplied definition came from
- ;; an older version of sysdep.el.
-
- ;; Packages such as w3 that wish to include this file with the package
- ;; should rename it to something unique, such as `w3-sysdep.el', and
- ;; load it with `load-library'. That will ensure that no conflicts
- ;; arise if more than one package in the load path provides a version
- ;; of sysdep.el. If multiple packages load sysdep.el, the most recent
- ;; version will end up loaded; as long as I'm careful not to
- ;; introduce bugs in previously working definitions, this should work
- ;; fine.
-
- ;; You may well discover deficiencies in this file as you use it.
- ;; The preferable way of dealing with this is to send me a patch
- ;; to sysdep.el; that way, the collective body of knowledge gets
- ;; increased.
-
- ;; DO NOT load this file with `require'.
- ;; DO NOT put a `provide' statement in this file.
-
- ;; IMPORTANT: leave the version string in the format X.XXX (e.g. 1.001)
- ;; so that string comparisons to other versions work properly.
-
- (defconst sysdep-potential-version "0.002")
-
- (if (and (boundp 'sysdep-version)
- (not (string-lessp sysdep-version sysdep-potential-version)))
- ;; if a more recent version of sysdep was already loaded,
- ;; or if the same package is loaded again, don't load.
- nil
-
- (defconst sysdep-version sysdep-potential-version)
-
- ;; this macro means: define the function, but only if either it
- ;; wasn't bound before, or the supplied binding comes from an older
- ;; version of sysdep.el. That way, user-supplied bindings don't
- ;; get overridden.
-
- ;; note: sysdep-defalias is often more useful than this function,
- ;; esp. since you can do load-time conditionalizing and can
- ;; optionally leave the function undefined. (e.g. frame functions
- ;; in v18.)
-
- (defmacro sysdep-defun (function &rest everything-else)
- (` (cond ((or (not (fboundp (quote (, function))))
- (get (quote (, function)) 'sysdep-defined-this))
- (put (quote (, function)) 'sysdep-defined-this t)
- (defun (, function) (,@ everything-else))))))
-
- (defmacro sysdep-defvar (function &rest everything-else)
- (` (cond ((or (not (boundp (quote (, function))))
- (get (quote (, function)) 'sysdep-defined-this))
- (put (quote (, function)) 'sysdep-defined-this t)
- (defvar (, function) (,@ everything-else))))))
-
- (defmacro sysdep-defconst (function &rest everything-else)
- (` (cond ((or (not (boundp (quote (, function))))
- (get (quote (, function)) 'sysdep-defined-this))
- (put (quote (, function)) 'sysdep-defined-this t)
- (defconst (, function) (,@ everything-else))))))
-
- ;; similar for fset and defalias. No need to quote as the argument
- ;; is already quoted.
-
- (defmacro sysdep-fset (function def)
- (` (cond ((and (or (not (fboundp (, function)))
- (get (, function) 'sysdep-defined-this))
- (, def))
- (put (, function) 'sysdep-defined-this t)
- (fset (, function) (, def))))))
-
- (defmacro sysdep-defalias (function def)
- (` (cond ((and (or (not (fboundp (, function)))
- (get (, function) 'sysdep-defined-this))
- (, def)
- (or (listp (, def))
- (and (symbolp (, def))
- (fboundp (, def)))))
- (put (, function) 'sysdep-defined-this t)
- (defalias (, function) (, def))))))
-
- ;; bootstrapping: defalias and define-function don't exist
- ;; in older versions of lemacs
-
- (sysdep-fset 'defalias 'fset)
- (sysdep-defalias 'define-function 'defalias)
-
- ;; useful ways of determining what version is running
- ;; emacs-major-version and emacs-minor-version are
- ;; already defined in recent versions of FSF Emacs and XEmacs
-
- (sysdep-defconst emacs-major-version
- ;; will string-match ever fail? If so, assume 19.0.
- ;; (should we assume 18.something?)
- (if (string-match "^[0-9]+" emacs-version)
- (string-to-int
- (substring emacs-version
- (match-beginning 0) (match-end 0)))
- 19))
-
- (sysdep-defconst emacs-minor-version
- (if (string-match "^[0-9]+\\.\\([0-9]+\\)" emacs-version)
- (string-to-int
- (substring emacs-version
- (match-beginning 1) (match-end 1)))
- 0))
-
- (sysdep-defconst sysdep-running-xemacs
- (or (string-match "Lucid" emacs-version)
- (string-match "XEmacs" emacs-version)))
-
- (sysdep-defconst window-system nil)
- (sysdep-defconst window-system-version 0)
-
- (sysdep-defvar list-buffers-directory nil)
- (sysdep-defvar x-library-search-path '("/usr/X11R6/lib/X11/"
- "/usr/X11R5/lib/X11/"
- "/usr/lib/X11R6/X11/"
- "/usr/lib/X11R5/X11/"
- "/usr/local/X11R6/lib/X11/"
- "/usr/local/X11R5/lib/X11/"
- "/usr/local/lib/X11R6/X11/"
- "/usr/local/lib/X11R5/X11/"
- "/usr/X11/lib/X11/"
- "/usr/lib/X11/"
- "/usr/local/lib/X11/"
- "/usr/X386/lib/X11/"
- "/usr/x386/lib/X11/"
- "/usr/XFree86/lib/X11/"
- "/usr/unsupported/lib/X11/"
- "/usr/athena/lib/X11/"
- "/usr/local/x11r5/lib/X11/"
- "/usr/lpp/Xamples/lib/X11/"
- "/usr/openwin/lib/X11/"
- "/usr/openwin/share/lib/X11/")
- "Search path used for X11 libraries.")
-
- ;; frame-related stuff.
-
- (sysdep-defalias 'buffer-dedicated-frame 'buffer-dedicated-screen)
- (sysdep-defalias 'deiconify-frame
- (cond ((fboundp 'deiconify-screen) 'deiconify-screen)
- ;; make-frame-visible will be defined as necessary
- (t 'make-frame-visible)))
- (sysdep-defalias 'delete-frame 'delete-screen)
- (sysdep-defalias 'event-frame 'event-screen)
- (sysdep-defalias 'event-glyph-extent 'event-glyph)
- (sysdep-defalias 'find-file-other-frame 'find-file-other-screen)
- (sysdep-defalias 'find-file-read-only-other-frame
- 'find-file-read-only-other-screen)
- (sysdep-defalias 'frame-height 'screen-height)
- (sysdep-defalias 'frame-iconified-p 'screen-iconified-p)
- (sysdep-defalias 'frame-left-margin-width 'screen-left-margin-width)
- (sysdep-defalias 'frame-list 'screen-list)
- (sysdep-defalias 'frame-live-p
- (cond ((fboundp 'screen-live-p) 'screen-live-p)
- ((fboundp 'live-screen-p) 'live-screen-p)
- ;; #### not sure if this is correct (this is for Epoch)
- ;; but gnuserv.el uses it this way
- ((fboundp 'screenp) 'screenp)))
- (sysdep-defalias 'frame-name 'screen-name)
- (sysdep-defalias 'frame-parameters 'screen-parameters)
- (sysdep-defalias 'frame-pixel-height 'screen-pixel-height)
- (sysdep-defalias 'frame-pixel-width 'screen-pixel-width)
- (sysdep-defalias 'frame-right-margin-width 'screen-right-margin-width)
- (sysdep-defalias 'frame-root-window 'screen-root-window)
- (sysdep-defalias 'frame-selected-window 'screen-selected-window)
- (sysdep-defalias 'frame-totally-visible-p 'screen-totally-visible-p)
- (sysdep-defalias 'frame-visible-p 'screen-visible-p)
- (sysdep-defalias 'frame-width 'screen-width)
- (sysdep-defalias 'framep 'screenp)
- (sysdep-defalias 'get-frame-for-buffer 'get-screen-for-buffer)
- (sysdep-defalias 'get-frame-for-buffer-noselect 'get-screen-for-buffer-noselect)
- (sysdep-defalias 'get-other-frame 'get-other-screen)
- (sysdep-defalias 'iconify-frame 'iconify-screen)
- (sysdep-defalias 'lower-frame 'lower-screen)
- (sysdep-defalias 'mail-other-frame 'mail-other-screen)
-
- (sysdep-defalias 'make-frame
- (cond ((fboundp 'make-screen)
- (function (lambda (&optional parameters device)
- (make-screen parameters))))
- ((fboundp 'x-create-screen)
- (function (lambda (&optional parameters device)
- (x-create-screen parameters))))))
-
- (sysdep-defalias 'make-frame-invisible 'make-screen-invisible)
- (sysdep-defalias 'make-frame-visible
- (cond ((fboundp 'make-screen-visible) 'make-screen-visible)
- ((fboundp 'mapraised-screen) 'mapraised-screen)
- ((fboundp 'x-remap-window)
- (lambda (&optional x)
- (x-remap-window)
- (accept-process-output)))))
- (sysdep-defalias 'modify-frame-parameters 'modify-screen-parameters)
- (sysdep-defalias 'new-frame 'new-screen)
- (sysdep-defalias 'next-frame 'next-screen)
- (sysdep-defalias 'next-multiframe-window 'next-multiscreen-window)
- (sysdep-defalias 'other-frame 'other-screen)
- (sysdep-defalias 'previous-frame 'previous-screen)
- (sysdep-defalias 'previous-multiframe-window 'previous-multiscreen-window)
- (sysdep-defalias 'raise-frame
- (cond ((fboundp 'raise-screen) 'raise-screen)
- ((fboundp 'mapraise-screen) 'mapraise-screen)))
- (sysdep-defalias 'redraw-frame 'redraw-screen)
- (sysdep-defalias 'select-frame 'select-screen)
- (sysdep-defalias 'selected-frame 'selected-screen)
- (sysdep-defalias 'set-buffer-dedicated-frame 'set-buffer-dedicated-screen)
- (sysdep-defalias 'set-frame-height 'set-screen-height)
- (sysdep-defalias 'set-frame-left-margin-width 'set-screen-left-margin-width)
- (sysdep-defalias 'set-frame-position 'set-screen-position)
- (sysdep-defalias 'set-frame-right-margin-width 'set-screen-right-margin-width)
- (sysdep-defalias 'set-frame-size 'set-screen-size)
- (sysdep-defalias 'set-frame-width 'set-screen-width)
- (sysdep-defalias 'show-temp-buffer-in-current-frame 'show-temp-buffer-in-current-screen)
- (sysdep-defalias 'switch-to-buffer-other-frame 'switch-to-buffer-other-screen)
- (sysdep-defalias 'visible-frame-list 'visible-screen-list)
- (sysdep-defalias 'window-frame 'window-screen)
- (sysdep-defalias 'x-create-frame 'x-create-screen)
- (sysdep-defalias 'x-set-frame-icon-pixmap 'x-set-screen-icon-pixmap)
- (sysdep-defalias 'x-set-frame-pointer 'x-set-screen-pointer)
- (sysdep-defalias 'x-display-color-p 'x-color-display-p)
- (sysdep-defalias 'x-display-grayscale-p 'x-grayscale-display-p)
- (sysdep-defalias 'menu-event-p 'misc-user-event-p)
-
- (sysdep-defun add-submenu (menu-path submenu &optional before)
- "Add a menu to the menubar or one of its submenus.
- If the named menu exists already, it is changed.
- MENU-PATH identifies the menu under which the new menu should be inserted.
- It is a list of strings; for example, (\"File\") names the top-level \"File\"
- menu. (\"File\" \"Foo\") names a hypothetical submenu of \"File\".
- If MENU-PATH is nil, then the menu will be added to the menubar itself.
- SUBMENU is the new menu to add.
- See the documentation of `current-menubar' for the syntax.
- BEFORE, if provided, is the name of a menu before which this menu should
- be added, if this menu is not on its parent already. If the menu is already
- present, it will not be moved."
- (add-menu menu-path (car submenu) (cdr submenu) before))
-
- (sysdep-defun add-menu-button (menu-path menu-leaf &optional before)
- "Add a menu item to some menu, creating the menu first if necessary.
- If the named item exists already, it is changed.
- MENU-PATH identifies the menu under which the new menu item should be inserted.
- It is a list of strings; for example, (\"File\") names the top-level \"File\"
- menu. (\"File\" \"Foo\") names a hypothetical submenu of \"File\".
- MENU-LEAF is a menubar leaf node. See the documentation of `current-menubar'.
- BEFORE, if provided, is the name of a menu item before which this item should
- be added, if this item is not on the menu already. If the item is already
- present, it will not be moved."
- (add-menu-item menu-path (aref menu-leaf 0) (aref menu-leaf 1)
- (aref menu-leaf 2) before))
-
- (sysdep-defun make-glyph (&optional spec-list)
- (if (and spec-list (cdr-safe (assq 'x spec-list)))
- (make-pixmap (cdr-safe (assq 'x spec-list)))))
-
- (sysdep-defalias 'face-list 'list-faces)
-
- (sysdep-defun set-face-property (face property value &optional locale
- tag-set how-to-add)
- "Change a property of FACE."
- (and (symbolp face)
- (put face property value)))
-
- (sysdep-defun face-property (face property &optional locale tag-set exact-p)
- "Return FACE's value of the given PROPERTY."
- (and (symbolp face) (get face property)))
-
- ;; Device functions
- ;; By wmperry@spry.com
- ;; This is a complete implementation of all the device-* functions found in
- ;; XEmacs 19.14. A 'device' for Emacs 19 is just a frame, from which we can
- ;; determine the connection to an X display, etc.
-
- (sysdep-defalias 'selected-device 'ignore)
- (sysdep-defalias 'device-or-frame-p 'framep)
- (sysdep-defalias 'device-console 'ignore)
- (sysdep-defalias 'device-sound-enabled-p 'ignore)
- (sysdep-defalias 'device-live-p 'frame-live-p)
- (sysdep-defalias 'devicep 'framep)
- (sysdep-defalias 'frame-device 'identity)
- (sysdep-defalias 'redisplay-device 'redraw-frame)
- (sysdep-defalias 'redraw-device 'redraw-frame)
- (sysdep-defalias 'select-device 'select-frame)
- (sysdep-defalias 'set-device-class 'ignore)
-
- (sysdep-defun make-device (type connection &optional props)
- "Create a new device of type TYPE, attached to connection CONNECTION.
-
- The valid values for CONNECTION are device-specific; however,
- CONNECTION is generally a string. (Specifically, for X devices,
- CONNECTION should be a display specification such as \"foo:0\", and
- for TTY devices, CONNECTION should be the filename of a TTY device
- file, such as \"/dev/ttyp4\", or nil to refer to XEmacs' standard
- input/output.)
-
- PROPS, if specified, should be a plist of properties controlling
- device creation.
-
- If CONNECTION specifies an already-existing device connection, that
- device is simply returned; no new device is created, and PROPS
- have no effect."
- (cond
- ((and (eq type 'x) connection)
- (make-frame-on-display display props))
- ((eq type 'x)
- (make-frame props))
- ((eq type 'tty)
- nil)
- (t
- (error "Unsupported device-type: %s" type))))
-
- (sysdep-defun make-frame-on-device (type connection &optional props)
- "Create a frame of type TYPE on CONNECTION.
- TYPE should be a symbol naming the device type, i.e. one of
-
- x An X display. CONNECTION should be a standard display string
- such as \"unix:0\", or nil for the display specified on the
- command line or in the DISPLAY environment variable. Only if
- support for X was compiled into XEmacs.
- tty A standard TTY connection or terminal. CONNECTION should be
- a TTY device name such as \"/dev/ttyp2\" (as determined by
- the Unix command `tty') or nil for XEmacs' standard input
- and output (usually the TTY in which XEmacs started). Only
- if support for TTY's was compiled into XEmacs.
- ns A connection to a machine running the NeXTstep windowing
- system. Not currently implemented.
- win32 A connection to a machine running Microsoft Windows NT or
- Windows 95. Not currently implemented.
- pc A direct-write MS-DOS frame. Not currently implemented.
-
- PROPS should be a plist of properties, as in the call to `make-frame'.
-
- If a connection to CONNECTION already exists, it is reused; otherwise,
- a new connection is opened."
- (make-device type connection props))
-
- (sysdep-defun make-tty-device (&optional tty terminal-type)
- "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."
- (make-device 'tty tty (list 'terminal-type terminal-type)))
-
- (sysdep-defun make-x-device (&optional display)
- (make-device 'x display))
-
- (sysdep-defun set-device-selected-frame (device frame)
- "Set the selected frame of device object DEVICE to FRAME.
- If DEVICE is nil, the selected device is used.
- If DEVICE is the selected device, this makes FRAME the selected frame."
- (select-frame frame))
-
- (sysdep-defun set-device-baud-rate (device rate)
- "Set the output baud rate of DEVICE to RATE.
- On most systems, changing this value will affect the amount of padding
- and other strategic decisions made during redisplay."
- (setq baud-rate rate))
-
- (sysdep-defun dfw-device (obj)
- "Given a device, frame, or window, return the associated device.
- Return nil otherwise."
- (cond
- ((windowp obj)
- (window-frame obj))
- ((framep obj)
- obj)
- (t
- nil)))
-
- (sysdep-defun event-device (event)
- "Return the device that EVENT occurred on.
- This will be nil for some types of events (e.g. keyboard and eval events)."
- (dfw-device (posn-window (event-start event))))
-
- (sysdep-defun find-device (connection &optional type)
- "Look for an existing device attached to connection CONNECTION.
- Return the device if found; otherwise, return nil.
-
- If TYPE is specified, only return devices of that type; otherwise,
- return devices of any type. (It is possible, although unlikely,
- that two devices of different types could have the same connection
- name; in such a case, the first device found is returned.)"
- (let ((devices (device-list))
- (retval nil))
- (while (and devices (not nil))
- (if (equal connection (device-connection (car devices)))
- (setq retval (car devices)))
- (setq devices (cdr devices)))
- retval))
-
- (sysdep-defalias 'get-device 'find-device)
-
- (sysdep-defun device-baud-rate (&optional device)
- "Return the output baud rate of DEVICE."
- baud-rate)
-
- (sysdep-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."
- (and (cdr-safe (assq 'display (frame-parameters device))) t))
-
- (sysdep-defun device-name (&optional device)
- "Return the name of the specified device."
- ;; doesn't handle the 19.29 multiple X display stuff yet
- ;; doesn't handle NeXTStep either
- (cond
- ((null window-system) "stdio")
- ((getenv "DISPLAY")
- (let ((str (getenv "DISPLAY"))
- (x (1- (length (getenv "DISPLAY"))))
- (y 0))
- (while (/= y x)
- (if (or (= (aref str y) ?:)
- (= (aref str y) ?.))
- (aset str y ?-))
- (setq y (1+ y)))
- str))
- (t "stdio")))
-
-
- (sysdep-defun device-connection (&optional device)
- "Return the connection of the specified device.
- DEVICE defaults to the selected device if omitted"
- (or (cdr-safe (assq 'display (frame-parameters device))) "stdio"))
-
- (sysdep-defun device-frame-list (&optional device)
- "Return a list of all frames on DEVICE.
- If DEVICE is nil, the selected device will be used."
- (let ((desired (device-connection device)))
- (filtered-frame-list (function (lambda (x) (equal (device-connection x)
- desired))))))
- (sysdep-defun device-list ()
- "Return a list of all devices"
- (let ((seen nil)
- (cur nil)
- (conn nil)
- (retval nil)
- (not-heard (frame-list)))
- (while not-heard
- (setq cur (car not-heard)
- conn (device-connection cur)
- not-heard (cdr not-heard))
- (if (member conn seen)
- nil ; Already got it
- (setq seen (cons conn seen) ; Whoo hoo, a new one!
- retval (cons cur retval))))
- retval))
-
- (sysdep-defvar delete-device-hook nil
- "Function or functions to call when a device is deleted.
- One argument, the to-be-deleted device.")
-
- (sysdep-defun delete-device (device &optional force)
- "Delete DEVICE, permanently eliminating it from use.
- Normally, you cannot delete the last non-minibuffer-only frame (you must
- use `save-buffers-kill-emacs' or `kill-emacs'). However, if optional
- second argument FORCE is non-nil, you can delete the last frame. (This
- will automatically call `save-buffers-kill-emacs'.)"
- (let ((frames (device-frame-list device)))
- (run-hook-with-args 'delete-device-hook device)
- (while frames
- (delete-frame (car frames) force)
- (setq frames (cdr frames)))))
-
- (sysdep-defalias 'device-color-cells
- (cond
- ((null window-system) 'ignore)
- ((fboundp 'display-color-cells) 'display-color-cells)
- ((fboundp 'x-display-color-cells) 'x-display-color-cells)
- ((fboundp 'ns-display-color-cells) 'ns-display-color-celles)
- (t 'ignore)))
-
- (sysdep-defun try-font-name (fontname &rest args)
- (car-safe (x-list-fonts fontname)))
-
- (sysdep-defalias 'device-pixel-width
- (cond
- ((and (eq window-system 'x) (fboundp 'x-display-pixel-width))
- 'x-display-pixel-width)
- ((and (eq window-system 'ns) (fboundp 'ns-display-pixel-width))
- 'ns-display-pixel-width)
- (t 'ignore)))
-
- (sysdep-defalias 'device-pixel-height
- (cond
- ((and (eq window-system 'x) (fboundp 'x-display-pixel-height))
- 'x-display-pixel-height)
- ((and (eq window-system 'ns) (fboundp 'ns-display-pixel-height))
- 'ns-display-pixel-height)
- (t 'ignore)))
-
- (sysdep-defalias 'device-mm-width
- (cond
- ((and (eq window-system 'x) (fboundp 'x-display-mm-width))
- 'x-display-mm-width)
- ((and (eq window-system 'ns) (fboundp 'ns-display-mm-width))
- 'ns-display-mm-width)
- (t 'ignore)))
-
- (sysdep-defalias 'device-mm-height
- (cond
- ((and (eq window-system 'x) (fboundp 'x-display-mm-height))
- 'x-display-mm-height)
- ((and (eq window-system 'ns) (fboundp 'ns-display-mm-height))
- 'ns-display-mm-height)
- (t 'ignore)))
-
- (sysdep-defalias 'device-bitplanes
- (cond
- ((and (eq window-system 'x) (fboundp 'x-display-planes))
- 'x-display-planes)
- ((and (eq window-system 'ns) (fboundp 'ns-display-planes))
- 'ns-display-planes)
- (t 'ignore)))
-
- (sysdep-defalias 'device-class
- (cond
- ((and (eq window-system 'x) (fboundp 'x-display-visual-class))
- (function
- (lambda (&optional device)
- (let ((val (symbol-name (x-display-visual-class device))))
- (cond
- ((string-match "color" val) 'color)
- ((string-match "gray-scale" val) 'grayscale)
- (t 'mono))))))
- ((fboundp 'number-of-colors)
- (function
- (lambda (&optional device)
- (if (= 2 (number-of-colors))
- 'mono
- 'color))))
- ((and (eq window-system 'x) (fboundp 'x-color-p))
- (function
- (lambda (&optional device)
- (if (x-color-p)
- 'color
- 'mono))))
- ((and (eq window-system 'ns) (fboundp 'ns-display-visual-class))
- (function
- (lambda (&optional device)
- (let ((val (symbol-name (ns-display-visual-class))))
- (cond
- ((string-match "color" val) 'color)
- ((string-match "gray-scale" val) 'grayscale)
- (t 'mono))))))
- (t (function (lambda (&optional device) 'mono)))))
-
- (sysdep-defun device-class-list ()
- "Returns a list of valid device classes."
- (list 'color 'grayscale 'mono))
-
- (sysdep-defun valid-device-class-p (class)
- "Given a CLASS, return t if it is valid.
- Valid classes are 'color, 'grayscale, and 'mono."
- (memq class (device-class-list)))
-
- (sysdep-defun device-or-frame-type (device-or-frame)
- "Return the type (e.g. `x' or `tty') of DEVICE-OR-FRAME.
- DEVICE-OR-FRAME should be a device or a frame object. See `device-type'
- for a description of the possible types."
- (if (cdr-safe (assq 'display (frame-parameters device-or-frame)))
- window-system
- 'tty))
-
- (sysdep-defun device-type (&optional device)
- "Return the type of the specified device (e.g. `x' or `tty').
- Value is `tty' for a tty device (a character-only terminal),
- `x' for a device which is a connection to an X server,
- 'ns' for a device which is a connection to a NeXTStep dps server,
- 'win32' for a Windows-NT window,
- 'pm' for an OS/2 Presentation Manager window,
- 'intuition' for an Amiga screen"
- (device-or-frame-type device))
-
- (sysdep-defun device-type-list ()
- "Return a list of valid console types."
- (if window-system
- (list window-system 'tty)
- (list 'tty)))
-
- (sysdep-defun valid-device-type-p (type)
- "Given a TYPE, return t if it is valid."
- (memq type (device-type-list)))
-
-
- ;; Extent stuff
- (sysdep-fset 'delete-extent 'delete-overlay)
- (sysdep-fset 'extent-end-position 'overlay-end)
- (sysdep-fset 'extent-start-position 'overlay-start)
- (sysdep-fset 'set-extent-endpoints 'move-overlay)
-
- (sysdep-defun extent-property (extent property &optional default)
- (or (overlay-get extent property) default))
-
- (sysdep-defun extent-at (pos &optional object property before at-flag)
- (let ((tmp (overlays-at (point)))
- ovls)
- (if property
- (while tmp
- (if (extent-property (car tmp) property)
- (setq ovls (cons (car tmp) ovls)))
- (setq tmp (cdr tmp)))
- (setq ovls tmp
- tmp nil))
- (car-safe
- (sort ovls
- (function
- (lambda (a b)
- (< (- (extent-end-position a) (extent-start-position a))
- (- (extent-end-position b) (extent-start-position b)))))))))
-
-
- (sysdep-defun overlays-in (beg end)
- "Return a list of the overlays that overlap the region BEG ... END.
- Overlap means that at least one character is contained within the overlay
- and also contained within the specified region.
- Empty overlays are included in the result if they are located at BEG
- or between BEG and END."
- (let ((ovls (overlay-lists))
- tmp retval)
- (if (< end beg)
- (setq tmp end
- end beg
- beg tmp))
- (setq ovls (nconc (car ovls) (cdr ovls)))
- (while ovls
- (setq tmp (car ovls)
- ovls (cdr ovls))
- (if (or (and (<= (overlay-start tmp) end)
- (>= (overlay-start tmp) beg))
- (and (<= (overlay-end tmp) end)
- (>= (overlay-end tmp) beg)))
- (setq retval (cons tmp retval))))
- retval))
-
- (sysdep-defun map-extents (function &optional object from to
- maparg flags property value)
- (let ((tmp (overlays-in (or from (point-min))
- (or to (point-max))))
- ovls)
- (if property
- (while tmp
- (if (extent-property (car tmp) property)
- (setq ovls (cons (car tmp) ovls)))
- (setq tmp (cdr tmp)))
- (setq ovls tmp
- tmp nil))
- (catch 'done
- (while ovls
- (setq tmp (funcall function (car ovls) maparg)
- ovls (cdr ovls))
- (if tmp
- (throw 'done tmp))))))
-
- ;; misc
- (sysdep-defun alist-to-plist (alist)
- "Convert association list ALIST into the equivalent property-list form.
- The plist is returned. This converts from
-
- \((a . 1) (b . 2) (c . 3))
-
- into
-
- \(a 1 b 2 c 3)
-
- The original alist is not modified. See also `destructive-alist-to-plist'."
- (let (plist)
- (while alist
- (let ((el (car alist)))
- (setq plist (cons (cdr el) (cons (car el) plist))))
- (setq alist (cdr alist)))
- (nreverse plist)))
-
- (sysdep-defun add-minor-mode (toggle name &optional keymap after toggle-fun)
- "Add a minor mode to `minor-mode-alist' and `minor-mode-map-alist'.
- TOGGLE is a symbol which is used as the variable which toggle the minor mode,
- NAME is the name that should appear in the modeline (it should be a string
- beginning with a space), KEYMAP is a keymap to make active when the minor
- mode is active, and AFTER is the toggling symbol used for another minor
- mode. If AFTER is non-nil, then it is used to position the new mode in the
- minor-mode alists. TOGGLE-FUN specifies an interactive function that
- is called to toggle the mode on and off; this affects what appens when
- button2 is pressed on the mode, and when button3 is pressed somewhere
- in the list of modes. If TOGGLE-FUN is nil and TOGGLE names an
- interactive function, TOGGLE is used as the toggle function.
-
- Example: (add-minor-mode 'view-minor-mode \" View\" view-mode-map)"
- (if (not (assq toggle minor-mode-alist))
- (setq minor-mode-alist (cons (list toggle name) minor-mode-alist)))
- (if (and keymap (not (assq toggle minor-mode-map-alist)))
- (setq minor-mode-map-alist (cons (cons toggle keymap)
- minor-mode-map-alist))))
-
- (sysdep-defvar x-font-regexp-foundry-and-family
- (let ((- "[-?]")
- (foundry "[^-]+")
- (family "[^-]+")
- )
- (concat "\\`[-?*]" foundry - "\\(" family "\\)" -)))
-
- (sysdep-defun match-string (num &optional string)
- "Return string of text matched by last search.
- NUM specifies which parenthesized expression in the last regexp.
- Value is nil if NUMth pair didn't match, or there were less than NUM pairs.
- Zero means the entire text matched by the whole regexp or whole string.
- STRING should be given if the last search was by `string-match' on STRING."
- (if (match-beginning num)
- (if string
- (substring string (match-beginning num) (match-end num))
- (buffer-substring (match-beginning num) (match-end num)))))
-
- (sysdep-defun add-hook (hook-var function &optional at-end)
- "Add a function to a hook.
- First argument HOOK-VAR (a symbol) is the name of a hook, second
- argument FUNCTION is the function to add.
- Third (optional) argument AT-END means to add the function at the end
- of the hook list instead of the beginning. If the function is already
- present, this has no effect.
- Returns nil if FUNCTION was already present in HOOK-VAR, else new
- value of HOOK-VAR."
- (if (not (boundp hook-var)) (set hook-var nil))
- (let ((old (symbol-value hook-var)))
- (if (or (not (listp old)) (eq (car old) 'lambda))
- (setq old (list old)))
- (if (member function old)
- nil
- (set hook-var
- (if at-end
- (append old (list function)) ; don't nconc
- (cons function old))))))
-
- (sysdep-defalias 'valid-color-name-p
- (cond
- ((fboundp 'x-valid-color-name-p) ; XEmacs/Lucid
- 'x-valid-color-name-p)
- ((and window-system
- (fboundp 'color-defined-p)) ; NS/Emacs 19
- 'color-defined-p)
- ((and window-system
- (fboundp 'x-color-defined-p)) ; Emacs 19
- 'x-color-defined-p)
- ((fboundp 'get-color) ; Epoch
- (function (lambda (color)
- (let ((x (get-color color)))
- (if x
- (setq x (progn
- (free-color x)
- t)))
- x))))
- (t 'identity))) ; All others
-
- ;; Misc.
- (sysdep-defun split-string (string pattern)
- "Return a list of substrings of STRING which are separated by PATTERN."
- (let (parts (start 0))
- (while (string-match pattern string start)
- (setq parts (cons (substring string start (match-beginning 0)) parts)
- start (match-end 0)))
- (nreverse (cons (substring string start) parts))
- ))
-
- (sysdep-defun member (elt list)
- (while (and list (not (equal elt (car list))))
- (setq list (cdr list)))
- list)
-
- (sysdep-defun rassoc (key list)
- (let ((found nil))
- (while (and list (not found))
- (if (equal (cdr (car list)) key) (setq found (car list)))
- (setq list (cdr list)))
- found))
-
- (sysdep-defun display-error (error-object stream)
- "Display `error-object' on `stream' in a user-friendly way."
- (funcall (or (let ((type (car-safe error-object)))
- (catch 'error
- (and (consp error-object)
- (symbolp type)
- ;;(stringp (get type 'error-message))
- (consp (get type 'error-conditions))
- (let ((tail (cdr error-object)))
- (while (not (null tail))
- (if (consp tail)
- (setq tail (cdr tail))
- (throw 'error nil)))
- t)
- ;; (check-type condition condition)
- (get type 'error-conditions)
- ;; Search class hierarchy
- (let ((tail (get type 'error-conditions)))
- (while (not (null tail))
- (cond ((not (and (consp tail)
- (symbolp (car tail))))
- (throw 'error nil))
- ((get (car tail) 'display-error)
- (throw 'error (get (car tail)
- 'display-error)))
- (t
- (setq tail (cdr tail)))))
- ;; Default method
- (function
- (lambda (error-object stream)
- (let ((type (car error-object))
- (tail (cdr error-object))
- (first t))
- (if (eq type 'error)
- (progn (princ (car tail) stream)
- (setq tail (cdr tail)))
- (princ (or (get type 'error-message) type)
- stream))
- (while tail
- (princ (if first ": " ", ") stream)
- (prin1 (car tail) stream)
- (setq tail (cdr tail)
- first nil)))))))))
- (function
- (lambda (error-object stream)
- (princ "Peculiar error " stream)
- (prin1 error-object stream))))
- error-object stream))
-
- (sysdep-defun find-face (face)
- (car-safe (memq face (face-list))))
-
- ;; window functions
-
- ;; not defined in v18
- (sysdep-defun eval-buffer (bufname &optional printflag)
- (save-excursion
- (set-buffer bufname)
- (eval-current-buffer)))
-
- (sysdep-defun window-minibuffer-p (window)
- "Returns non-nil if WINDOW is a minibuffer window."
- (eq window (minibuffer-window)))
-
- ;; not defined in v18
- (sysdep-defun window-live-p (window)
- "Returns t if OBJ is a window which is currently visible."
- (and (windowp window)
- (window-point window)))
-
- ;; this parenthesis closes the if statement at the top of the file.
-
- )
-
- ;; DO NOT put a provide statement here. This file should never be
- ;; loaded with `require'. Use `load-library' instead.
-
- ;;; sysdep.el ends here
-
- ;;;(sysdep.el) Local Variables:
- ;;;(sysdep.el) eval: (put 'sysdep-defun 'lisp-indent-function 'defun)
- ;;;(sysdep.el) eval: (put 'sysdep-defalias 'lisp-indent-function 'defun)
- ;;;(sysdep.el) eval: (put 'sysdep-defconst 'lisp-indent-function 'defun)
- ;;;(sysdep.el) eval: (put 'sysdep-defvar 'lisp-indent-function 'defun)
- ;;;(sysdep.el) End:
-