-;; Print Emacs buffer on line printer.
-;; Copyright (C) 1985, 1988, 1992 Free Software Foundation, Inc.
+;;; lpr.el --- print Emacs buffer on line printer.
+
+;; Copyright (C) 1985, 1988, 1992, 1994 Free Software Foundation, Inc.
+
+;; Maintainer: FSF
+;; Keywords: unix
;; 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 1, or (at your option)
+;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING. If not, write to
-;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+;; along with GNU Emacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Commentary:
+
+;; Commands to send the region or a buffer your printer. Entry points
+;; are `lpr-buffer', `print-buffer', lpr-region', or `print-region'; option
+;; variables include `lpr-switches' and `lpr-command'.
+;;; Code:
;;;###autoload
-(defconst lpr-switches nil "\
-*List of strings to pass as extra switch args to lpr when it is invoked.")
+(defvar lpr-switches nil
+ "*List of strings to pass as extra options for the printer program.
+See `lpr-command'.")
-(defvar lpr-command (if (eq system-type 'usg-unix-v)
- "lp" "lpr")
- "*Shell command for printing a file")
+(defvar lpr-add-switches (eq system-type 'berkeley-unix)
+ "*Non-nil means construct -T and -J options for the printer program.
+These are made assuming that the program is `lpr';
+if you are using some other incompatible printer program,
+this variable should be nil.")
+
+;;;###autoload
+(defvar lpr-command
+ (if (memq system-type '(usg-unix-v dgux hpux irix))
+ "lp" "lpr")
+ "*Name of program for printing a file.")
+
+;; Default is nil, because that enables us to use pr -f
+;; which is more reliable than pr with no args, which is what lpr -p does.
+(defvar lpr-headers-switches nil
+ "*List of strings of options to request page headings in the printer program.
+If nil, we run `lpr-page-header-program' to make page headings
+and print the result.")
(defvar print-region-function nil
"Function to call to print the region on a printer.
See definition of `print-region-1' for calling conventions.")
+(defvar lpr-page-header-program "pr"
+ "*Name of program for adding page headers to a file.")
+
+(defvar lpr-page-header-switches '("-f")
+ "*List of strings to use as options for the page-header-generating program.
+The variable `lpr-page-header-program' specifies the program to use.")
+
;;;###autoload
(defun lpr-buffer ()
"Print buffer contents as with Unix command `lpr'.
(print-region-1 start end lpr-switches t))
(defun print-region-1 (start end switches page-headers)
+ ;; On some MIPS system, having a space in the job name
+ ;; crashes the printer demon. But using dashes looks ugly
+ ;; and it seems to annoying to do for that MIPS system.
(let ((name (concat (buffer-name) " Emacs buffer"))
- (width tab-width))
+ (title (concat (buffer-name) " Emacs buffer"))
+ ;; On MS-DOS systems, make pipes use binary mode if the
+ ;; original file is binary.
+ (binary-process-input buffer-file-type)
+ (binary-process-output buffer-file-type)
+ (width tab-width)
+ switch-string)
(save-excursion
- (message "Spooling...")
+ (if page-headers
+ (if lpr-headers-switches
+ ;; It is possible to use an lpr option
+ ;; to get page headers.
+ (setq switches (append (if (stringp lpr-headers-switches)
+ (list lpr-headers-switches)
+ lpr-headers-switches)
+ switches))))
+ (setq switch-string
+ (if switches (concat " with options "
+ (mapconcat 'identity switches " "))
+ ""))
+ (message "Spooling%s..." switch-string)
(if (/= tab-width 8)
- (progn
- (print-region-new-buffer start end)
+ (let ((new-coords (print-region-new-buffer start end)))
+ (setq start (car new-coords) end (cdr new-coords))
(setq tab-width width)
+ (save-excursion
+ (goto-char end)
+ (setq end (point-marker)))
(untabify (point-min) (point-max))))
(if page-headers
- (if (eq system-type 'usg-unix-v)
- (progn
- (print-region-new-buffer)
- (call-process-region start end "pr" t t nil))
- ;; On BSD, use an option to get page headers.
- (setq switches (cons "-p" switches))))
+ (if lpr-headers-switches
+ ;; We handled this above by modifying SWITCHES.
+ nil
+ ;; Run a separate program to get page headers.
+ (let ((new-coords (print-region-new-buffer start end)))
+ (setq start (car new-coords) end (cdr new-coords)))
+ (apply 'call-process-region start end lpr-page-header-program
+ t t nil
+ (nconc (and lpr-add-switches
+ (list "-h" title))
+ lpr-page-header-switches))
+ (setq start (point-min) end (point-max))))
(apply (or print-region-function 'call-process-region)
(nconc (list start end lpr-command
nil nil nil)
- (nconc (and (eq system-type 'berkeley-unix)
- (list "-J" name "-T" name))
+ (nconc (and lpr-add-switches
+ (list "-J" name))
+ ;; These belong in pr if we are using that.
+ (and lpr-add-switches lpr-headers-switches
+ (list "-T" title))
switches)))
- (message "Spooling...done"))))
+ (if (markerp end)
+ (set-marker end nil))
+ (message "Spooling%s...done" switch-string))))
;; This function copies the text between start and end
-;; into a new buffer, makes that buffer current,
-;; and sets start and end to the buffer bounds.
-;; start and end are used free.
-(defun print-region-new-buffer ()
- (or (string= (buffer-name) " *spool temp*")
- (let ((oldbuf (current-buffer)))
- (set-buffer (get-buffer-create " *spool temp*"))
- (widen) (erase-buffer)
- (insert-buffer-substring oldbuf start end)
- (setq start (point-min) end (point-max)))))
+;; into a new buffer, makes that buffer current.
+;; It returns the new range to print from the new current buffer
+;; as (START . END).
+
+(defun print-region-new-buffer (ostart oend)
+ (if (string= (buffer-name) " *spool temp*")
+ (cons ostart oend)
+ (let ((oldbuf (current-buffer)))
+ (set-buffer (get-buffer-create " *spool temp*"))
+ (widen) (erase-buffer)
+ (insert-buffer-substring oldbuf ostart oend)
+ (cons (point-min) (point-max)))))
+
+(defun printify-region (begin end)
+ "Turn nonprinting characters (other than TAB, LF, SPC, RET, and FF)
+in the current buffer into printable representations as control or
+hexadecimal escapes."
+ (interactive "r")
+ (save-excursion
+ (goto-char begin)
+ (let (c)
+ (while (re-search-forward "[\^@-\^h\^k\^n-\^_\177-\377]" end t)
+ (setq c (preceding-char))
+ (delete-backward-char 1)
+ (insert
+ (if (< c ?\ )
+ (format "\\^%c" (+ c ?@))
+ (format "\\%02x" c)))))))
+
+(provide 'lpr)
+
+;;; lpr.el ends here
HCoop / bpt / emacs.git / blobdiff