emacs / lisp / w32-fns.el

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;;; w32-fns.el --- Lisp routines for Windows NT.

;; Copyright (C) 1994 Free Software Foundation, Inc.

;; Author: Geoff Voelker (

;; This file is part of GNU Emacs.

;; GNU Emacs 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.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Commentary:

;; (August 12, 1993)
;; Created.

;; (November 21, 1994)
;; [C-M-backspace] defined.
;; mode-line-format defined to show buffer file type.
;; audio bell initialized.

;;; Code:

;; Map delete and backspace
(define-key function-key-map [backspace] "\177")
(define-key function-key-map [delete] "\C-d")
(define-key function-key-map [M-backspace] [?\M-\177])
(define-key function-key-map [C-M-backspace] [\C-\M-delete])

;; Ignore case on file-name completion
(setq completion-ignore-case t)

(defvar w32-system-shells '("cmd" "cmd.exe" "command" "")
  "List of strings recognized as Windows NT/95 system shells.")

(defun w32-using-nt ()
  "Return t if running on Windows NT (as oppposed to, e.g., Windows 95)."
  (and (eq system-type 'windows-nt) (getenv "SystemRoot")))

(defun w32-shell-name ()
  "Return the name of the shell being used on Windows NT/95."
  (or (and (boundp 'explicit-shell-file-name) explicit-shell-file-name)
      (getenv "ESHELL")
      (getenv "SHELL")
      (and (w32-using-nt) "cmd.exe")

(defun w32-using-system-shell-p ()
  "Return t if using a Windows NT/95 system shell (cmd.exe or"
  (member (downcase (file-name-nondirectory (w32-shell-name))) 

(defun w32-startup ()
  "Configure Emacs during startup for running on Windows NT/95.
This function is invoked after loading the init files and processing
the command line, and is intended to initialize anything important 
not initialized by the user or site."
  ;; Configure shell mode if using a system shell.
  (cond ((w32-using-system-shell-p)
	 (let ((shell (file-name-nondirectory (w32-shell-name))))
	   ;; "/c" is used for executing command line arguments.
	   (setq shell-command-switch "/c")
	   ;; Complete directories using a backslash.
	   (setq comint-completion-addsuffix '("\\" . " "))
	   ;; Initialize the explicit-"shell"-args variable.
	   (cond ((member (downcase shell) '("cmd" "cmd.exe"))
		  (let* ((args-sym-name (format "explicit-%s-args" shell))
			 (args-sym (intern-soft args-sym-name)))
		    (cond ((not args-sym)
			   (setq args-sym (intern args-sym-name))
			   ;; The "/q" prevents cmd.exe from echoing commands.
			   (set args-sym '("/q")))))))))))

(add-hook 'emacs-startup-hook 'w32-startup)

;; Avoid creating auto-save file names containing invalid characters.
(fset 'original-make-auto-save-file-name
      (symbol-function 'make-auto-save-file-name))

(defun make-auto-save-file-name ()
  "Return file name to use for auto-saves of current buffer.
Does not consider `auto-save-visited-file-name' as that variable is checked
before calling this function.  You can redefine this for customization.
See also `auto-save-file-name-p'."
  (let ((name (original-make-auto-save-file-name))
	(start 0))
    ;; Skip drive letter if present.
    (if (string-match "^[\/]?[a-zA-`]:" name)
	(setq start (- (match-end 0) (match-beginning 0))))
    ;; Destructively replace occurrences of *?"<>|: with $
    (while (string-match "[?*\"<>|:]" name start)
      (aset name (match-beginning 0) ?$)
      (setq start (1+ (match-end 0))))

;;; Fix interface to (X-specific) mouse.el
(defun x-set-selection (type data)
  (or type (setq type 'PRIMARY))
  (put 'x-selections type data))

(defun x-get-selection (&optional type data-type)
  (or type (setq type 'PRIMARY))
  (get 'x-selections type))

(fmakunbound 'font-menu-add-default)
(global-unset-key [C-down-mouse-1])
(global-unset-key [C-down-mouse-2])
(global-unset-key [C-down-mouse-3])

;;; Set to a system sound if you want a fancy bell.
(set-message-beep nil)

;;; w32-fns.el ends here