mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-22 10:26:20 +00:00
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; -*-
|
|
|
|
;; Copyright (C) 1996, 2001-2021 Free Software Foundation, Inc.
|
|
|
|
;; Maintainer: Geoff Voelker <voelker@cs.washington.edu>
|
|
;; Keywords: internal
|
|
;; Package: emacs
|
|
|
|
;; 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 3 of the License, 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
|
|
;; 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 GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
;;; Commentary:
|
|
|
|
;; Parts of this code are duplicated functions taken from dos-fns.el
|
|
;; and winnt.el.
|
|
|
|
;;; Code:
|
|
|
|
;; Use ";" instead of ":" as a path separator (from files.el).
|
|
(when (memq system-type '(ms-dos windows-nt))
|
|
(setq path-separator ";")
|
|
(push 'file-name-history minibuffer-history-case-insensitive-variables)
|
|
;; Set the null device (for compile.el).
|
|
(setq null-device "NUL")
|
|
(setq-default buffer-file-coding-system 'undecided-dos))
|
|
|
|
;; For distinguishing file types based upon suffixes. DEPRECATED, DO NOT USE!
|
|
(defcustom file-name-buffer-file-type-alist
|
|
'(("[:/].*config.sys$" . nil) ; config.sys text
|
|
("\\.\\(obj\\|exe\\|com\\|lib\\|sys\\|bin\\|ico\\|pif\\|class\\)$" . t)
|
|
; MS-Dos stuff
|
|
("\\.\\(dll\\|drv\\|386\\|vxd\\|fon\\|fnt\\|fot\\|ttf\\|grp\\)$" . t)
|
|
; Windows stuff
|
|
("\\.\\(bmp\\|wav\\|avi\\|mpg\\|jpg\\|tif\\|mov\\|au\\)$" . t)
|
|
; known binary data files
|
|
("\\.\\(arc\\|zip\\|pak\\|lzh\\|zoo\\)$" . t)
|
|
; Packers
|
|
("\\.\\(a\\|o\\|tar\\|z\\|gz\\|taz\\|jar\\)$" . t)
|
|
; Unix stuff
|
|
("\\.sx[dmicw]$" . t) ; OpenOffice.org
|
|
("\\.tp[ulpw]$" . t) ; borland Pascal stuff
|
|
("[:/]tags$" . nil) ; emacs TAGS file
|
|
)
|
|
"Alist used in the past for distinguishing text files from binary files.
|
|
Each element has the form (REGEXP . TYPE), where REGEXP is matched
|
|
against the file name, and TYPE is nil for text, t for binary.
|
|
|
|
This variable is deprecated, not used anywhere, and will soon be deleted."
|
|
:type '(repeat (cons regexp boolean))
|
|
:group 'dos-fns
|
|
:group 'w32)
|
|
|
|
(make-obsolete-variable 'file-name-buffer-file-type-alist
|
|
'file-coding-system-alist
|
|
"24.4")
|
|
|
|
(defun find-buffer-file-type-coding-system (command)
|
|
"Choose a coding system for a file operation in COMMAND.
|
|
COMMAND is a list that specifies the operation, an I/O primitive, as its
|
|
CAR, and the arguments that might be given to that operation as its CDR.
|
|
If operation is `insert-file-contents', the coding system is chosen based
|
|
upon the filename (the CAR of the arguments beyond the operation), the contents
|
|
of `w32-untranslated-filesystem-list' and `file-name-buffer-file-type-alist',
|
|
and whether the file exists:
|
|
|
|
If it matches in `w32-untranslated-filesystem-list':
|
|
If the file exists: `undecided'
|
|
If the file does not exist: `undecided-unix'
|
|
Otherwise:
|
|
If the file exists: `undecided'
|
|
If the file does not exist default value of `buffer-file-coding-system'
|
|
|
|
Note that the CAR of arguments to `insert-file-contents' operation could
|
|
be a cons cell of the form (FILENAME . BUFFER), where BUFFER is a buffer
|
|
into which the file's contents were already read, but not yet decoded.
|
|
|
|
If operation is `write-region', the coding system is chosen based
|
|
upon the value of `buffer-file-coding-system'. If
|
|
`buffer-file-coding-system' is non-nil, its value is used.
|
|
Otherwise, it is `undecided-dos'.
|
|
|
|
The most common situation is when DOS and Unix files are read and
|
|
written, and their names do not match in `w32-untranslated-filesystem-list'.
|
|
In these cases, the coding system initially will be `undecided'.
|
|
As the file is read in the DOS case, the coding system will be
|
|
changed to `undecided-dos' as CR/LFs are detected. As the file
|
|
is read in the Unix case, the coding system will be changed to
|
|
`undecided-unix' as LFs are detected. In both cases,
|
|
`buffer-file-coding-system' will be set to the appropriate coding
|
|
system, and the value of `buffer-file-coding-system' will be used
|
|
when writing the file."
|
|
|
|
(let ((op (nth 0 command))
|
|
(undecided nil) (undecided-unix nil)
|
|
target target-buf)
|
|
(cond ((eq op 'insert-file-contents)
|
|
(setq target (nth 1 command))
|
|
;; If TARGET is a cons cell, it has the form (FILENAME . BUFFER),
|
|
;; where BUFFER is a buffer into which the file was already read,
|
|
;; but its contents were not yet decoded. (This form of the
|
|
;; arguments is used, e.g., in arc-mode.el.) This function
|
|
;; doesn't care about the contents, it only looks at the file's
|
|
;; name, which is the CAR of the cons cell.
|
|
(when (consp target)
|
|
(setq target-buf
|
|
(and (bufferp (cdr target))
|
|
(buffer-name (cdr target))))
|
|
(setq target (car target)))
|
|
(cond ((or
|
|
;; For any existing file, decide based on contents.
|
|
(file-exists-p target)
|
|
;; If TARGET does not exist as a file, replace its
|
|
;; base name with TARGET-BUF and try again. This
|
|
;; is for jka-compr's sake, which strips the
|
|
;; compression (.gz etc.) extension from the
|
|
;; FILENAME, but leaves it in the BUFFER's name.
|
|
(and (stringp target-buf)
|
|
(file-exists-p
|
|
(expand-file-name target-buf
|
|
(file-name-directory target)))))
|
|
(setq undecided t))
|
|
;; Next check for a non-DOS file system.
|
|
((w32-untranslated-file-p target)
|
|
(setq undecided-unix t)))
|
|
(cond (undecided-unix '(undecided-unix . undecided-unix))
|
|
(undecided '(undecided . undecided))
|
|
(t (cons (default-value 'buffer-file-coding-system)
|
|
(default-value 'buffer-file-coding-system)))))
|
|
((eq op 'write-region)
|
|
(if buffer-file-coding-system
|
|
(cons buffer-file-coding-system
|
|
buffer-file-coding-system)
|
|
;; Normally this is used only in a non-file-visiting
|
|
;; buffer, because normally buffer-file-coding-system is non-nil
|
|
;; in a file-visiting buffer.
|
|
'(undecided-dos . undecided-dos))))))
|
|
(make-obsolete 'find-buffer-file-type-coding-system nil "24.4")
|
|
|
|
(defun find-file-binary (filename)
|
|
"Visit file FILENAME and treat it as binary."
|
|
;; FIXME: Why here rather than in files.el?
|
|
;; FIXME: Can't we use find-file-literally for the same purposes?
|
|
(interactive "FFind file binary: ")
|
|
(let ((coding-system-for-read 'no-conversion)) ;; FIXME: undecided-unix?
|
|
(with-suppressed-warnings ((interactive-only find-file))
|
|
(find-file filename))))
|
|
|
|
(defun find-file-text (filename)
|
|
"Visit file FILENAME and treat it as a text file."
|
|
(interactive "FFind file text: ")
|
|
(let ((coding-system-for-read 'undecided-dos))
|
|
(with-suppressed-warnings ((interactive-only find-file))
|
|
(find-file filename))))
|
|
|
|
(defun w32-find-file-not-found-set-buffer-file-coding-system ()
|
|
(with-current-buffer (current-buffer)
|
|
(let ((coding buffer-file-coding-system))
|
|
;; buffer-file-coding-system is already set by
|
|
;; find-operation-coding-system, which was called from
|
|
;; insert-file-contents. All that's left is to change
|
|
;; the EOL conversion, if required by the user.
|
|
(when (and (null coding-system-for-read)
|
|
(or inhibit-eol-conversion
|
|
(w32-untranslated-file-p (buffer-file-name))))
|
|
(setq coding (coding-system-change-eol-conversion coding 0))
|
|
(setq buffer-file-coding-system coding))
|
|
nil)))
|
|
|
|
;; To set the default coding system on new files.
|
|
(add-hook 'find-file-not-found-functions
|
|
'w32-find-file-not-found-set-buffer-file-coding-system)
|
|
|
|
;;; To accommodate filesystems that do not require CR/LF translation.
|
|
(define-obsolete-variable-alias 'untranslated-filesystem-list
|
|
'w32-untranslated-filesystem-list "24.4")
|
|
(defvar w32-untranslated-filesystem-list nil
|
|
"List of filesystems that require no CR/LF translation when reading
|
|
and writing files. Each filesystem in the list is a string naming
|
|
the directory prefix corresponding to the filesystem.")
|
|
|
|
(defun w32-untranslated-canonical-name (filename)
|
|
"Return FILENAME in a canonicalized form for use with the functions
|
|
dealing with untranslated filesystems."
|
|
(if (memq system-type '(ms-dos windows-nt cygwin))
|
|
;; The canonical form for DOS/W32 is with A-Z downcased and all
|
|
;; directory separators changed to directory-sep-char.
|
|
(let ((name
|
|
(mapconcat (lambda (char)
|
|
(char-to-string (if (and (<= ?A char ?Z))
|
|
(+ (- char ?A) ?a)
|
|
char)))
|
|
filename nil)))
|
|
;; Use expand-file-name to canonicalize directory separators, except
|
|
;; with bare drive letters (which would have the cwd appended).
|
|
;; Avoid expanding names that could trigger ange-ftp to prompt
|
|
;; for passwords, though.
|
|
(if (or (string-match-p "^.:\\'" name)
|
|
(string-match-p "^/[^/:]+:" name))
|
|
name
|
|
(expand-file-name name)))
|
|
filename))
|
|
|
|
(defun w32-untranslated-file-p (filename)
|
|
"Return t if FILENAME is on a filesystem that does not require
|
|
CR/LF translation, and nil otherwise."
|
|
(let ((fs (w32-untranslated-canonical-name filename))
|
|
(ufs-list w32-untranslated-filesystem-list)
|
|
(found nil))
|
|
(while (and (not found) ufs-list)
|
|
(if (string-match-p (concat "^" (car ufs-list)) fs)
|
|
(setq found t)
|
|
(setq ufs-list (cdr ufs-list))))
|
|
found))
|
|
|
|
(define-obsolete-function-alias 'add-untranslated-filesystem
|
|
'w32-add-untranslated-filesystem "24.4")
|
|
(defun w32-add-untranslated-filesystem (filesystem)
|
|
"Add FILESYSTEM to the list of filesystems that do not require
|
|
CR/LF translation. FILESYSTEM is a string containing the directory
|
|
prefix corresponding to the filesystem. For example, for a Unix
|
|
filesystem mounted on drive Z:, FILESYSTEM could be \"Z:\"."
|
|
;; We use "D", not "f", to avoid confusing the user: "f" prompts
|
|
;; with a directory, but RET returns the current buffer's file, not
|
|
;; its directory.
|
|
(interactive "DUntranslated file system: ")
|
|
(let ((fs (w32-untranslated-canonical-name filesystem)))
|
|
(if (member fs w32-untranslated-filesystem-list)
|
|
w32-untranslated-filesystem-list
|
|
(push fs w32-untranslated-filesystem-list))))
|
|
|
|
|
|
(define-obsolete-function-alias 'remove-untranslated-filesystem
|
|
'w32-remove-untranslated-filesystem "24.4")
|
|
(defun w32-remove-untranslated-filesystem (filesystem)
|
|
"Remove FILESYSTEM from the list of filesystems that do not require
|
|
CR/LF translation. FILESYSTEM is a string containing the directory
|
|
prefix corresponding to the filesystem. For example, for a Unix
|
|
filesystem mounted on drive Z:, FILESYSTEM could be \"Z:\"."
|
|
(interactive "fUntranslated file system: ")
|
|
(setq w32-untranslated-filesystem-list
|
|
(delete (w32-untranslated-canonical-name filesystem)
|
|
w32-untranslated-filesystem-list)))
|
|
|
|
;;; Support for printing under DOS/Windows, see lpr.el and ps-print.el.
|
|
|
|
(define-obsolete-variable-alias 'direct-print-region-use-command-dot-com
|
|
'w32-direct-print-region-use-command-dot-com "24.4")
|
|
(defcustom w32-direct-print-region-use-command-dot-com t
|
|
"If non-nil, use command.com to print on Windows 9x."
|
|
:type 'boolean
|
|
:group 'dos-fns
|
|
:group 'w32)
|
|
|
|
(defvar w32-quote-process-args)
|
|
|
|
;; Function to actually send data to the printer port.
|
|
;; Supports writing directly, and using various programs.
|
|
(defun w32-direct-print-region-helper (printer
|
|
start end
|
|
lpr-prog
|
|
_delete-text _buf _display
|
|
rest)
|
|
(let* (;; Ignore case when matching known external program names.
|
|
(case-fold-search t)
|
|
;; Convert / to \ in printer name, for sake of external programs.
|
|
(printer
|
|
(if (stringp printer)
|
|
(subst-char-in-string ?/ ?\\ printer)
|
|
printer))
|
|
;; Find a directory that is local, to work-around Windows bug.
|
|
(safe-dir
|
|
(let ((safe-dirs (list "c:/" (getenv "windir") (getenv "TMPDIR"))))
|
|
(while (not (file-attributes (car safe-dirs)))
|
|
(setq safe-dirs (cdr safe-dirs)))
|
|
(car safe-dirs)))
|
|
(tempfile
|
|
(subst-char-in-string
|
|
?/ ?\\
|
|
(make-temp-name
|
|
(expand-file-name "EP" temporary-file-directory))))
|
|
;; capture output for diagnosis
|
|
(errbuf (list (get-buffer-create " *print-region-helper*") t)))
|
|
;; It seems that we must be careful about the directory name that
|
|
;; gets added to the printer port name by write-region when using
|
|
;; the standard "PRN" or "LPTx" ports, because the write can fail if
|
|
;; the directory is on a network drive. The same is true when
|
|
;; asking command.com to copy the file.
|
|
;; No action is needed for UNC printer names, which is just as well
|
|
;; because `expand-file-name' doesn't support UNC names on MS-DOS.
|
|
(if (and (stringp printer) (not (string-match-p "^\\\\" printer)))
|
|
(setq printer
|
|
(subst-char-in-string ?/ ?\\ (expand-file-name printer safe-dir))))
|
|
;; Handle known programs specially where necessary.
|
|
(unwind-protect
|
|
(cond
|
|
;; nprint.exe is the standard print command on Netware
|
|
((string-match-p "\\`nprint\\(\\.exe\\)?\\'"
|
|
(file-name-nondirectory lpr-prog))
|
|
(write-region start end tempfile nil 0)
|
|
(call-process lpr-prog nil errbuf nil
|
|
tempfile (concat "P=" printer)))
|
|
;; print.exe is a standard command on NT
|
|
((string-match-p "\\`print\\(\\.exe\\)?\\'"
|
|
(file-name-nondirectory lpr-prog))
|
|
;; Be careful not to invoke print.exe on MS-DOS or Windows 9x
|
|
;; though, because it is a TSR program there (hangs Emacs).
|
|
(or (and (eq system-type 'windows-nt)
|
|
(null (getenv "winbootdir")))
|
|
(error "Printing via print.exe is not supported on MS-DOS or Windows 9x"))
|
|
;; It seems that print.exe always appends a form-feed so we
|
|
;; should make sure to omit the last FF in the data.
|
|
(if (and (> end start)
|
|
(char-equal (char-before end) ?\C-l))
|
|
(setq end (1- end)))
|
|
;; cancel out annotate function for non-PS case
|
|
(let ((write-region-annotate-functions nil))
|
|
(write-region start end tempfile nil 0))
|
|
(call-process lpr-prog nil errbuf nil
|
|
(concat "/D:" printer) tempfile))
|
|
;; support lpr and similar programs for convenience, but
|
|
;; supply an explicit filename because the NT version of lpr
|
|
;; can't read from stdin.
|
|
((> (length lpr-prog) 0)
|
|
(write-region start end tempfile nil 0)
|
|
(setq rest (append rest (list tempfile)))
|
|
(apply 'call-process lpr-prog nil errbuf nil rest))
|
|
;; Run command.com to access printer port on Windows 9x, unless
|
|
;; we are supposed to append to an existing (non-empty) file,
|
|
;; to work around a bug in Windows 9x that prevents Windows
|
|
;; programs from accessing LPT ports reliably.
|
|
((and (eq system-type 'windows-nt)
|
|
(getenv "winbootdir")
|
|
;; Allow cop-out so command.com isn't invoked
|
|
w32-direct-print-region-use-command-dot-com
|
|
;; file-attributes fails on LPT ports on Windows 9x but
|
|
;; not on NT, so handle both cases for safety.
|
|
(eq (or (file-attribute-size (file-attributes printer)) 0) 0))
|
|
(write-region start end tempfile nil 0)
|
|
(let ((w32-quote-process-args nil))
|
|
(call-process "command.com" nil errbuf nil "/c"
|
|
(format "copy /b %s %s" tempfile printer))))
|
|
;; write directly to the printer port
|
|
(t
|
|
(write-region start end printer t 0)))
|
|
;; ensure we remove the tempfile if created
|
|
(if (file-exists-p tempfile)
|
|
(delete-file tempfile)))))
|
|
|
|
(defvar printer-name)
|
|
|
|
(declare-function default-printer-name "w32fns.c")
|
|
|
|
(define-obsolete-function-alias 'direct-print-region-function
|
|
'w32-direct-print-region-function "24.4")
|
|
(defun w32-direct-print-region-function (start end
|
|
&optional lpr-prog
|
|
delete-text buf display
|
|
&rest rest)
|
|
"DOS/Windows-specific function to print the region on a printer.
|
|
Writes the region to the device or file which is a value of
|
|
`printer-name' (which see), unless the value of `lpr-command'
|
|
indicates a specific program should be invoked."
|
|
|
|
;; DOS printers need the lines to end with CR-LF pairs, so make
|
|
;; sure it always happens that way, unless the buffer is binary.
|
|
(let* ((coding coding-system-for-write)
|
|
(coding-base
|
|
(if (null coding) 'undecided (coding-system-base coding)))
|
|
(eol-type (coding-system-eol-type coding-base))
|
|
;; Make each print-out eject the final page, but don't waste
|
|
;; paper if the file ends with a form-feed already.
|
|
(write-region-annotate-functions
|
|
(cons
|
|
(lambda (_start end)
|
|
(if (not (char-equal (char-before end) ?\f))
|
|
`((,end . "\f"))))
|
|
write-region-annotate-functions))
|
|
(printer (or (and (boundp 'dos-printer)
|
|
(stringp (symbol-value 'dos-printer))
|
|
(symbol-value 'dos-printer))
|
|
printer-name
|
|
(default-printer-name))))
|
|
(or (eq coding-system-for-write 'no-conversion)
|
|
(setq coding-system-for-write
|
|
(aref eol-type 1))) ; force conversion to DOS EOLs
|
|
(w32-direct-print-region-helper printer start end lpr-prog
|
|
delete-text buf display rest)))
|
|
|
|
(defvar lpr-headers-switches)
|
|
|
|
;; Set this to nil if you have a port of the `pr' program
|
|
;; (e.g., from GNU Textutils), or if you have an `lpr'
|
|
;; program (see above) that can print page headers.
|
|
;; If `lpr-headers-switches' is non-nil (the default) and
|
|
;; `print-region-function' is set to `dos-print-region-function',
|
|
;; then requests to print page headers will be silently
|
|
;; ignored, and `print-buffer' and `print-region' produce
|
|
;; the same output as `lpr-buffer' and `lpr-region', accordingly.
|
|
(when (memq system-type '(ms-dos windows-nt))
|
|
(setq lpr-headers-switches "(page headers are not supported)"))
|
|
|
|
(defvar ps-printer-name)
|
|
|
|
(define-obsolete-function-alias 'direct-ps-print-region-function
|
|
'w32-direct-ps-print-region-function "24.4")
|
|
(defun w32-direct-ps-print-region-function (start end
|
|
&optional lpr-prog
|
|
delete-text buf display
|
|
&rest rest)
|
|
"DOS/Windows-specific function to print the region on a PostScript printer.
|
|
Writes the region to the device or file which is a value of
|
|
`ps-printer-name' (which see), unless the value of `ps-lpr-command'
|
|
indicates a specific program should be invoked."
|
|
|
|
(let ((printer (or (and (boundp 'dos-ps-printer)
|
|
(stringp (symbol-value 'dos-ps-printer))
|
|
(symbol-value 'dos-ps-printer))
|
|
ps-printer-name
|
|
(default-printer-name))))
|
|
(w32-direct-print-region-helper printer start end lpr-prog
|
|
delete-text buf display rest)))
|
|
|
|
;(setq ps-lpr-command "gs")
|
|
|
|
;(setq ps-lpr-switches '("-q" "-dNOPAUSE" "-sDEVICE=epson" "-r240x60"
|
|
; "-sOutputFile=LPT1"))
|
|
|
|
(provide 'dos-w32)
|
|
|
|
;;; dos-w32.el ends here
|