If the match is nil (for dos-text): `undecided-dos'
Otherwise:
If the file exists: `undecided'
- If the file does not exist: `undecided-dos'
+ If the file does not exist: default-buffer-file-coding-system
If COMMAND is `write-region', the coding system is chosen based upon
the value of `buffer-file-coding-system' and `buffer-file-type'. If
(text '(undecided-dos . undecided-dos))
(undecided-unix '(undecided-unix . undecided-unix))
(undecided '(undecided . undecided))
- (t '(undecided-dos . undecided-dos))))
+ (t (cons default-buffer-file-coding-system
+ default-buffer-file-coding-system))))
((eq op 'write-region)
(if buffer-file-coding-system
(cons buffer-file-coding-system
(add-hook 'before-init-hook 'set-default-process-coding-system)
-;; Support for printing under DOS/Windows, see lpr.el and ps-print.el.
+;;; Support for printing under DOS/Windows, see lpr.el and ps-print.el.
+
+;; Function to actually send data to the printer port.
+;; Supports writing directly, and using various programs.
+(defun direct-print-region-helper (printer
+ start end
+ lpr-prog
+ delete-text buf display
+ rest)
+ (let* ((directory-sep-char ?\\) ; expand file names in DOS format
+ ;; 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
+ (make-temp-name
+ (expand-file-name "EP" (getenv "TMPDIR"))))
+ ;; 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 (not (string-match "^\\\\" printer))
+ (setq printer (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 "^nprint\\(\\.exe\\)?$" (file-name-nondirectory lpr-prog))
+ (write-region start end tempfile nil 0)
+ (call-process lpr-prog nil errbuf nil
+ tempfile (concat "P=" printer)))
+ ;; print.exe is a standard command on NT
+ ((string-match "^print\\(\\.exe\\)?$" (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 Win32
+ ;; programs from accessing LPT ports reliably.
+ ((and (eq system-type 'windows-nt)
+ (getenv "winbootdir")
+ ;; file-attributes fails on LPT ports on Windows 9x but
+ ;; not on NT, so handle both cases for safety.
+ (eq (or (nth 7 (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)
(defun direct-print-region-function (start end
&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' \(which see\). Ignores any arguments beyond
-START and END."
+`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)))
+ (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) ?\C-l))
+ `((,end . "\f"))))
+ write-region-annotate-functions))
+ (printer (or (and (boundp 'dos-printer)
+ (stringp (symbol-value 'dos-printer))
+ (symbol-value 'dos-printer))
+ printer-name)))
(or (eq coding-system-for-write 'no-conversion)
(setq coding-system-for-write
(aref eol-type 1))) ; force conversion to DOS EOLs
- (write-region start end
- (or (and (boundp 'dos-printer) dos-printer)
- printer-name)
- t 0)
- ;; Make each print-out start on a new page, but don't waste
- ;; paper if there was a form-feed at the end of this file.
- (if (not (char-equal (char-after (1- end)) ?\C-l))
- (write-region "\f" nil
- (or (and (boundp 'dos-printer) dos-printer)
- printer-name)
- t 0))))
-
-;; Set this to nil if you have a port of the `lpr' program and
-;; you want to use it for printing. If the default setting is
-;; in effect, `lpr-command' and its switches are ignored when
-;; printing with `lpr-xxx' and `print-xxx'.
+ (direct-print-region-helper printer start end lpr-prog
+ delete-text buf display rest)))
+
(setq print-region-function 'direct-print-region-function)
;; Set this to nil if you have a port of the `pr' program
(defvar ps-printer-name)
-(setq ps-lpr-command "gs")
+(defun 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)))
+ (direct-print-region-helper printer start end lpr-prog
+ delete-text buf display rest)))
+
+(setq ps-print-region-function 'direct-ps-print-region-function)
+
+;(setq ps-lpr-command "gs")
-(setq ps-lpr-switches '("-q" "-dNOPAUSE" "-sDEVICE=epson" "-r240x60"
- "-sOutputFile=LPT1" "-"))
+;(setq ps-lpr-switches '("-q" "-dNOPAUSE" "-sDEVICE=epson" "-r240x60"
+; "-sOutputFile=LPT1"))
(provide 'dos-w32)