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424 lines
17 KiB
EmacsLisp
424 lines
17 KiB
EmacsLisp
;;; dos-w32.el --- Functions shared among MS-DOS and W32 (NT/95) platforms
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;; Copyright (C) 1996 Free Software Foundation, Inc.
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;; Maintainer: Geoff Voelker <voelker@cs.washington.edu>
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;; Keywords: internal
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;; Parts of this code are duplicated functions taken from dos-fns.el
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;; and winnt.el.
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;;; Code:
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;; Use ";" instead of ":" as a path separator (from files.el).
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(setq path-separator ";")
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(setq minibuffer-history-case-insensitive-variables
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(cons 'file-name-history minibuffer-history-case-insensitive-variables))
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;; Set the null device (for compile.el).
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(setq null-device "NUL")
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;; Set the grep regexp to match entries with drive letters.
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(setq grep-regexp-alist
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'(("^\\(\\([a-zA-Z]:\\)?[^:( \t\n]+\\)[:( \t]+\\([0-9]+\\)[:) \t]" 1 3)))
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;; For distinguishing file types based upon suffixes.
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(defvar file-name-buffer-file-type-alist
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'(
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("[:/].*config.sys$" . nil) ; config.sys text
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("\\.\\(obj\\|exe\\|com\\|lib\\|sys\\|bin\\|ico\\|pif\\|class\\)$" . t)
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; MS-Dos stuff
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("\\.\\(dll\\|drv\\|386\\|vxd\\|fon\\|fnt\\|fot\\|ttf\\|grp\\)$" . t)
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; Windows stuff
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("\\.\\(bmp\\|wav\\|avi\\|mpg\\|jpg\\|tif\\|mov\\|au\\)$" . t)
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; known binary data files
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("\\.\\(arc\\|zip\\|pak\\|lzh\\|zoo\\)$" . t)
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; Packers
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("\\.\\(a\\|o\\|tar\\|z\\|gz\\|taz\\|jar\\)$" . t)
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; Unix stuff
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("\\.tp[ulpw]$" . t)
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; Borland Pascal stuff
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("[:/]tags$" . nil)
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; Emacs TAGS file
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)
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"*Alist for distinguishing text files from binary files.
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Each element has the form (REGEXP . TYPE), where REGEXP is matched
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against the file name, and TYPE is nil for text, t for binary.")
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;; Return the pair matching filename on file-name-buffer-file-type-alist,
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;; or nil otherwise.
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(defun find-buffer-file-type-match (filename)
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(let ((alist file-name-buffer-file-type-alist)
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(found nil))
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(let ((case-fold-search t))
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(setq filename (file-name-sans-versions filename))
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(while (and (not found) alist)
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(if (string-match (car (car alist)) filename)
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(setq found (car alist)))
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(setq alist (cdr alist)))
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found)))
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;; Don't check for untranslated file systems here.
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(defun find-buffer-file-type (filename)
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(let ((match (find-buffer-file-type-match filename))
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(code))
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(if (not match)
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default-buffer-file-type
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(setq code (cdr match))
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(cond ((memq code '(nil t)) code)
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((and (symbolp code) (fboundp code))
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(funcall code filename))))))
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(setq-default buffer-file-coding-system 'undecided-dos)
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(defun find-buffer-file-type-coding-system (command)
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"Choose a coding system for a file operation.
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If COMMAND is `insert-file-contents', the coding system is chosen based
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upon the filename, the contents of `untranslated-filesystem-list' and
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`file-name-buffer-file-type-alist', and whether the file exists:
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If it matches in `untranslated-filesystem-list':
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If the file exists: `no-conversion'
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If the file does not exist: `undecided'
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If it matches in `file-name-buffer-file-type-alist':
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If the match is t (for binary): `no-conversion'
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If the match is nil (for dos-text): `undecided-dos'
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Otherwise:
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If the file exists: `undecided'
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If the file does not exist: default-buffer-file-coding-system
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If COMMAND is `write-region', the coding system is chosen based upon
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the value of `buffer-file-coding-system' and `buffer-file-type'. If
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`buffer-file-coding-system' is non-nil, its value is used. If it is
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nil and `buffer-file-type' is t, the coding system is `no-conversion'.
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Otherwise, it is `undecided-dos'.
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The two most common situations are when DOS and Unix files are read
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and written, and their names do not match in
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`untranslated-filesystem-list' and `file-name-buffer-file-type-alist'.
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In these cases, the coding system initially will be `undecided'. As
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the file is read in the DOS case, the coding system will be changed to
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`undecided-dos' as CR/LFs are detected. As the file is read in the
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Unix case, the coding system will be changed to `undecided-unix' as
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LFs are detected. In both cases, `buffer-file-coding-system' will be
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set to the appropriate coding system, and the value of
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`buffer-file-coding-system' will be used when writing the file."
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(let ((op (nth 0 command))
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(target)
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(binary nil) (text nil)
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(undecided nil) (undecided-unix nil))
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(cond ((eq op 'insert-file-contents)
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(setq target (nth 1 command))
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;; First check for a file name that indicates
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;; it is truly binary.
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(setq binary (find-buffer-file-type target))
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(cond (binary)
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;; Next check for files that MUST use DOS eol conversion.
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((find-buffer-file-type-match target)
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(setq text t))
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;; For any other existing file, decide based on contents.
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((file-exists-p target)
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(setq undecided t))
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;; Next check for a non-DOS file system.
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((untranslated-file-p target)
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(setq undecided-unix t)))
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(cond (binary '(no-conversion . no-conversion))
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(text '(undecided-dos . undecided-dos))
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(undecided-unix '(undecided-unix . undecided-unix))
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(undecided '(undecided . undecided))
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(t (cons default-buffer-file-coding-system
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default-buffer-file-coding-system))))
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((eq op 'write-region)
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(if buffer-file-coding-system
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(cons buffer-file-coding-system
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buffer-file-coding-system)
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;; Normally this is used only in a non-file-visiting
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;; buffer, because normally buffer-file-coding-system is non-nil
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;; in a file-visiting buffer.
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(if buffer-file-type
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'(no-conversion . no-conversion)
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'(undecided-dos . undecided-dos)))))))
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(modify-coding-system-alist 'file "" 'find-buffer-file-type-coding-system)
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(defun find-file-binary (filename)
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"Visit file FILENAME and treat it as binary."
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(interactive "FFind file binary: ")
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(let ((file-name-buffer-file-type-alist '(("" . t))))
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(find-file filename)))
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(defun find-file-text (filename)
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"Visit file FILENAME and treat it as a text file."
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(interactive "FFind file text: ")
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(let ((file-name-buffer-file-type-alist '(("" . nil))))
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(find-file filename)))
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(defun find-file-not-found-set-buffer-file-coding-system ()
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(save-excursion
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(set-buffer (current-buffer))
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(let* ((dummy-insert-op (list 'insert-file-contents (buffer-file-name)))
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(coding-system-pair
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(find-buffer-file-type-coding-system dummy-insert-op)))
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(setq buffer-file-coding-system (car coding-system-pair))
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(setq buffer-file-type (eq buffer-file-coding-system 'no-conversion)))))
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;;; To set the default coding system on new files.
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(add-hook 'find-file-not-found-hooks
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'find-file-not-found-set-buffer-file-coding-system)
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;;; To accomodate filesystems that do not require CR/LF translation.
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(defvar untranslated-filesystem-list nil
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"List of filesystems that require no CR/LF translation when reading
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and writing files. Each filesystem in the list is a string naming
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the directory prefix corresponding to the filesystem.")
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(defun untranslated-canonical-name (filename)
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"Return FILENAME in a canonicalized form for use with the functions
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dealing with untranslated filesystems."
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(if (memq system-type '(ms-dos windows-nt))
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;; The canonical form for DOS/W32 is with A-Z downcased and all
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;; directory separators changed to directory-sep-char.
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(let ((name nil))
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(setq name (mapconcat
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'(lambda (char)
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(if (and (<= ?A char) (<= char ?Z))
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(char-to-string (+ (- char ?A) ?a))
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(char-to-string char)))
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filename nil))
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;; Use expand-file-name to canonicalize directory separators, except
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;; with bare drive letters (which would have the cwd appended).
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;; Avoid expanding names that could trigger ange-ftp to prompt
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;; for passwords, though.
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(if (or (string-match "^.:$" name)
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(string-match "^/[^/:]+:" name))
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name
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(expand-file-name name)))
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filename))
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(defun untranslated-file-p (filename)
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"Return t if FILENAME is on a filesystem that does not require
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CR/LF translation, and nil otherwise."
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(let ((fs (untranslated-canonical-name filename))
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(ufs-list untranslated-filesystem-list)
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(found nil))
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(while (and (not found) ufs-list)
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(if (string-match (concat "^" (car ufs-list)) fs)
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(setq found t)
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(setq ufs-list (cdr ufs-list))))
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found))
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(defun add-untranslated-filesystem (filesystem)
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"Add FILESYSTEM to the list of filesystems that do not require
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CR/LF translation. FILESYSTEM is a string containing the directory
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prefix corresponding to the filesystem. For example, for a Unix
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filesystem mounted on drive Z:, FILESYSTEM could be \"Z:\"."
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(interactive "fUntranslated file system: ")
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(let ((fs (untranslated-canonical-name filesystem)))
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(if (member fs untranslated-filesystem-list)
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untranslated-filesystem-list
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(setq untranslated-filesystem-list
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(cons fs untranslated-filesystem-list)))))
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(defun remove-untranslated-filesystem (filesystem)
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"Remove FILESYSTEM from the list of filesystems that do not require
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CR/LF translation. FILESYSTEM is a string containing the directory
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prefix corresponding to the filesystem. For example, for a Unix
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filesystem mounted on drive Z:, FILESYSTEM could be \"Z:\"."
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(interactive "fUntranslated file system: ")
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(setq untranslated-filesystem-list
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(delete (untranslated-canonical-name filesystem)
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untranslated-filesystem-list)))
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;;; Support for printing under DOS/Windows, see lpr.el and ps-print.el.
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(defvar direct-print-region-use-command-dot-com t
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"*Control whether command.com is used to print on Windows 9x.")
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;; Function to actually send data to the printer port.
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;; Supports writing directly, and using various programs.
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(defun direct-print-region-helper (printer
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start end
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lpr-prog
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delete-text buf display
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rest)
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(let* (;; Ignore case when matching known external program names.
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(case-fold-search t)
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;; Convert / to \ in printer name, for sake of external programs.
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(printer
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(if (stringp printer)
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(subst-char-in-string ?/ ?\\ printer)
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printer))
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;; Find a directory that is local, to work-around Windows bug.
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(safe-dir
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(let ((safe-dirs (list "c:/" (getenv "windir") (getenv "TMPDIR"))))
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(while (not (file-attributes (car safe-dirs)))
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(setq safe-dirs (cdr safe-dirs)))
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(car safe-dirs)))
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(tempfile
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(subst-char-in-string
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?/ ?\\
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(make-temp-name
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(expand-file-name "EP" temporary-file-directory))))
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;; capture output for diagnosis
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(errbuf (list (get-buffer-create " *print-region-helper*") t)))
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;; It seems that we must be careful about the directory name that
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;; gets added to the printer port name by write-region when using
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;; the standard "PRN" or "LPTx" ports, because the write can fail if
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;; the directory is on a network drive. The same is true when
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;; asking command.com to copy the file.
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;; No action is needed for UNC printer names, which is just as well
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;; because `expand-file-name' doesn't support UNC names on MS-DOS.
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(if (and (stringp printer) (not (string-match "^\\\\" printer)))
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(setq printer
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(subst-char-in-string ?/ ?\\ (expand-file-name printer safe-dir))))
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;; Handle known programs specially where necessary.
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(unwind-protect
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(cond
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;; nprint.exe is the standard print command on Netware
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((string-match "^nprint\\(\\.exe\\)?$" (file-name-nondirectory lpr-prog))
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(write-region start end tempfile nil 0)
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(call-process lpr-prog nil errbuf nil
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tempfile (concat "P=" printer)))
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;; print.exe is a standard command on NT
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((string-match "^print\\(\\.exe\\)?$" (file-name-nondirectory lpr-prog))
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;; Be careful not to invoke print.exe on MS-DOS or Windows 9x
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;; though, because it is a TSR program there (hangs Emacs).
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(or (and (eq system-type 'windows-nt)
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(null (getenv "winbootdir")))
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(error "Printing via print.exe is not supported on MS-DOS or Windows 9x"))
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;; It seems that print.exe always appends a form-feed so we
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;; should make sure to omit the last FF in the data.
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(if (and (> end start)
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(char-equal (char-before end) ?\C-l))
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(setq end (1- end)))
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;; cancel out annotate function for non-PS case
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(let ((write-region-annotate-functions nil))
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(write-region start end tempfile nil 0))
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(call-process lpr-prog nil errbuf nil
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(concat "/D:" printer) tempfile))
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;; support lpr and similar programs for convenience, but
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;; supply an explicit filename because the NT version of lpr
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;; can't read from stdin.
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((> (length lpr-prog) 0)
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(write-region start end tempfile nil 0)
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(setq rest (append rest (list tempfile)))
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(apply 'call-process lpr-prog nil errbuf nil rest))
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;; Run command.com to access printer port on Windows 9x, unless
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;; we are supposed to append to an existing (non-empty) file,
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;; to work around a bug in Windows 9x that prevents Win32
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;; programs from accessing LPT ports reliably.
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((and (eq system-type 'windows-nt)
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(getenv "winbootdir")
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;; Allow cop-out so command.com isn't invoked
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direct-print-region-use-command-dot-com
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;; file-attributes fails on LPT ports on Windows 9x but
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;; not on NT, so handle both cases for safety.
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(eq (or (nth 7 (file-attributes printer)) 0) 0))
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(write-region start end tempfile nil 0)
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(let ((w32-quote-process-args nil))
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(call-process "command.com" nil errbuf nil "/c"
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(format "copy /b %s %s" tempfile printer))))
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;; write directly to the printer port
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(t
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(write-region start end printer t 0)))
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;; ensure we remove the tempfile if created
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(if (file-exists-p tempfile)
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(delete-file tempfile)))))
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(defvar printer-name)
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(defun direct-print-region-function (start end
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&optional lpr-prog
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delete-text buf display
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&rest rest)
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"DOS/Windows-specific function to print the region on a printer.
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Writes the region to the device or file which is a value of
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`printer-name' \(which see\), unless the value of `lpr-command'
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indicates a specific program should be invoked."
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;; DOS printers need the lines to end with CR-LF pairs, so make
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;; sure it always happens that way, unless the buffer is binary.
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(let* ((coding coding-system-for-write)
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(coding-base
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(if (null coding) 'undecided (coding-system-base coding)))
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(eol-type (coding-system-eol-type coding-base))
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;; Make each print-out eject the final page, but don't waste
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;; paper if the file ends with a form-feed already.
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(write-region-annotate-functions
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(cons
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(lambda (start end)
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(if (not (char-equal (char-before end) ?\C-l))
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`((,end . "\f"))))
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write-region-annotate-functions))
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(printer (or (and (boundp 'dos-printer)
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(stringp (symbol-value 'dos-printer))
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(symbol-value 'dos-printer))
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printer-name)))
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(or (eq coding-system-for-write 'no-conversion)
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(setq coding-system-for-write
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(aref eol-type 1))) ; force conversion to DOS EOLs
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(direct-print-region-helper printer start end lpr-prog
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delete-text buf display rest)))
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(setq print-region-function 'direct-print-region-function)
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;; Set this to nil if you have a port of the `pr' program
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;; (e.g., from GNU Textutils), or if you have an `lpr'
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;; program (see above) that can print page headers.
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;; If `lpr-headers-switches' is non-nil (the default) and
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;; `print-region-function' is set to `dos-print-region-function',
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;; then requests to print page headers will be silently
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;; ignored, and `print-buffer' and `print-region' produce
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;; the same output as `lpr-buffer' and `lpr-region', accordingly.
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(setq lpr-headers-switches "(page headers are not supported)")
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(defvar ps-printer-name)
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(defun direct-ps-print-region-function (start end
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&optional lpr-prog
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delete-text buf display
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&rest rest)
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"DOS/Windows-specific function to print the region on a PostScript printer.
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Writes the region to the device or file which is a value of
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`ps-printer-name' \(which see\), unless the value of `ps-lpr-command'
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indicates a specific program should be invoked."
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(let ((printer (or (and (boundp 'dos-ps-printer)
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(stringp (symbol-value 'dos-ps-printer))
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(symbol-value 'dos-ps-printer))
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ps-printer-name)))
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(direct-print-region-helper printer start end lpr-prog
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delete-text buf display rest)))
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(setq ps-print-region-function 'direct-ps-print-region-function)
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;(setq ps-lpr-command "gs")
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;(setq ps-lpr-switches '("-q" "-dNOPAUSE" "-sDEVICE=epson" "-r240x60"
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; "-sOutputFile=LPT1"))
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(provide 'dos-w32)
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;;; dos-w32.el ends here
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