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443 lines
19 KiB
EmacsLisp
443 lines
19 KiB
EmacsLisp
;;; dos-w32.el --- Functions shared among MS-DOS and W32 (NT/95) platforms -*- lexical-binding: t; -*-
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;; Copyright (C) 1996, 2001-2022 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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;; Package: emacs
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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 3 of the License, or
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;; (at your option) 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. If not, see <https://www.gnu.org/licenses/>.
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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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(when (memq system-type '(ms-dos windows-nt))
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(setq path-separator ";")
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(push '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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(setq-default buffer-file-coding-system 'undecided-dos))
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;; For distinguishing file types based upon suffixes. DEPRECATED, DO NOT USE!
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(defcustom file-name-buffer-file-type-alist
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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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("\\.sx[dmicw]$" . t) ; OpenOffice.org
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("\\.tp[ulpw]$" . t) ; borland Pascal stuff
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("[:/]tags$" . nil) ; emacs TAGS file
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)
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"Alist used in the past 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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This variable is deprecated, not used anywhere, and will soon be deleted."
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:type '(repeat (cons regexp boolean))
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:group 'dos-fns
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:group 'w32)
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(make-obsolete-variable 'file-name-buffer-file-type-alist
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'file-coding-system-alist
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"24.4")
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(defun find-buffer-file-type-coding-system (command)
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"Choose a coding system for a file operation in COMMAND.
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COMMAND is a list that specifies the operation, an I/O primitive, as its
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CAR, and the arguments that might be given to that operation as its CDR.
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If operation is `insert-file-contents', the coding system is chosen based
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upon the filename (the CAR of the arguments beyond the operation), the contents
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of `w32-untranslated-filesystem-list' and `file-name-buffer-file-type-alist',
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and whether the file exists:
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If it matches in `w32-untranslated-filesystem-list':
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If the file exists: `undecided'
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If the file does not exist: `undecided-unix'
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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 value of `buffer-file-coding-system'
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Note that the CAR of arguments to `insert-file-contents' operation could
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be a cons cell of the form (FILENAME . BUFFER), where BUFFER is a buffer
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into which the file's contents were already read, but not yet decoded.
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If operation is `write-region', the coding system is chosen based
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upon the value of `buffer-file-coding-system'. If
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`buffer-file-coding-system' is non-nil, its value is used.
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Otherwise, it is `undecided-dos'.
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The most common situation is when DOS and Unix files are read and
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written, and their names do not match in `w32-untranslated-filesystem-list'.
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In these cases, the coding system initially will be `undecided'.
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As the file is read in the DOS case, the coding system will be
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changed to `undecided-dos' as CR/LFs are detected. As the file
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is read in the Unix case, the coding system will be changed to
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`undecided-unix' as LFs are detected. In both cases,
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`buffer-file-coding-system' will be set to the appropriate coding
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system, and the value of `buffer-file-coding-system' will be used
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when writing the file."
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(let ((op (nth 0 command))
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(undecided nil) (undecided-unix nil)
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target target-buf)
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(cond ((eq op 'insert-file-contents)
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(setq target (nth 1 command))
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;; If TARGET is a cons cell, it has the form (FILENAME . BUFFER),
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;; where BUFFER is a buffer into which the file was already read,
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;; but its contents were not yet decoded. (This form of the
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;; arguments is used, e.g., in arc-mode.el.) This function
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;; doesn't care about the contents, it only looks at the file's
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;; name, which is the CAR of the cons cell.
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(when (consp target)
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(setq target-buf
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(and (bufferp (cdr target))
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(buffer-name (cdr target))))
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(setq target (car target)))
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(cond ((or
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;; For any existing file, decide based on contents.
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(file-exists-p target)
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;; If TARGET does not exist as a file, replace its
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;; base name with TARGET-BUF and try again. This
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;; is for jka-compr's sake, which strips the
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;; compression (.gz etc.) extension from the
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;; FILENAME, but leaves it in the BUFFER's name.
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(and (stringp target-buf)
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(file-exists-p
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(expand-file-name target-buf
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(file-name-directory target)))))
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(setq undecided t))
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;; Next check for a non-DOS file system.
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((w32-untranslated-file-p target)
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(setq undecided-unix t)))
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(cond (undecided-unix '(undecided-unix . undecided-unix))
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(undecided '(undecided . undecided))
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(t (cons (default-value 'buffer-file-coding-system)
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(default-value '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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'(undecided-dos . undecided-dos))))))
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(make-obsolete 'find-buffer-file-type-coding-system nil "24.4")
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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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;; FIXME: Why here rather than in files.el?
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;; FIXME: Can't we use find-file-literally for the same purposes?
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(interactive "FFind file binary: ")
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(let ((coding-system-for-read 'no-conversion)) ;; FIXME: undecided-unix?
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(with-suppressed-warnings ((interactive-only find-file))
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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 ((coding-system-for-read 'undecided-dos))
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(with-suppressed-warnings ((interactive-only find-file))
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(find-file filename))))
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(defun w32-find-file-not-found-set-buffer-file-coding-system ()
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(with-current-buffer (current-buffer)
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(let ((coding buffer-file-coding-system))
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;; buffer-file-coding-system is already set by
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;; find-operation-coding-system, which was called from
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;; insert-file-contents. All that's left is to change
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;; the EOL conversion, if required by the user.
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(when (and (null coding-system-for-read)
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(or inhibit-eol-conversion
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(w32-untranslated-file-p (buffer-file-name))))
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(setq coding (coding-system-change-eol-conversion coding 0))
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(setq buffer-file-coding-system coding))
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nil)))
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;; To set the default coding system on new files.
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(add-hook 'find-file-not-found-functions
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'w32-find-file-not-found-set-buffer-file-coding-system)
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;;; To accommodate filesystems that do not require CR/LF translation.
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(define-obsolete-variable-alias 'untranslated-filesystem-list
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'w32-untranslated-filesystem-list "24.4")
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(defvar w32-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 w32-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 cygwin))
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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
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(mapconcat (lambda (char)
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(char-to-string (if (and (<= ?A char ?Z))
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(+ (- char ?A) ?a)
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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-p "^.:\\'" name)
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(string-match-p "^/[^/:]+:" name))
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name
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(expand-file-name name)))
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filename))
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(defun w32-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 (w32-untranslated-canonical-name filename))
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(ufs-list w32-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-p (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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(define-obsolete-function-alias 'add-untranslated-filesystem
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'w32-add-untranslated-filesystem "24.4")
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(defun w32-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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;; We use "D", not "f", to avoid confusing the user: "f" prompts
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;; with a directory, but RET returns the current buffer's file, not
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;; its directory.
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(interactive "DUntranslated file system: ")
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(let ((fs (w32-untranslated-canonical-name filesystem)))
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(if (member fs w32-untranslated-filesystem-list)
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w32-untranslated-filesystem-list
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(push fs w32-untranslated-filesystem-list))))
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(define-obsolete-function-alias 'remove-untranslated-filesystem
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'w32-remove-untranslated-filesystem "24.4")
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(defun w32-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 w32-untranslated-filesystem-list
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(delete (w32-untranslated-canonical-name filesystem)
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w32-untranslated-filesystem-list)))
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;;; Support for printing under DOS/Windows, see lpr.el and ps-print.el.
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(define-obsolete-variable-alias 'direct-print-region-use-command-dot-com
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'w32-direct-print-region-use-command-dot-com "24.4")
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(defcustom w32-direct-print-region-use-command-dot-com t
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"If non-nil, use command.com to print on Windows 9x."
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:type 'boolean
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:group 'dos-fns
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:group 'w32)
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(defvar w32-quote-process-args)
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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 w32-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-p "^\\\\" 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-p "\\`nprint\\(\\.exe\\)?\\'"
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(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-p "\\`print\\(\\.exe\\)?\\'"
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(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 Windows
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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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w32-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 (file-attribute-size (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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(declare-function default-printer-name "w32fns.c")
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(define-obsolete-function-alias 'direct-print-region-function
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'w32-direct-print-region-function "24.4")
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(defun w32-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) ?\f))
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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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(default-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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(w32-direct-print-region-helper printer start end lpr-prog
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delete-text buf display rest)))
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(defvar lpr-headers-switches)
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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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(when (memq system-type '(ms-dos windows-nt))
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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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(define-obsolete-function-alias 'direct-ps-print-region-function
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'w32-direct-ps-print-region-function "24.4")
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(defun w32-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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(default-printer-name))))
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(w32-direct-print-region-helper printer start end lpr-prog
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delete-text buf display rest)))
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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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