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;;; lpr.el --- print Emacs buffer on line printer.
;; Copyright (C) 1985, 1988, 1992 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 2, 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; see the file COPYING. If not, write to
;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
;;; Code:
;;;###autoload
(defconst lpr-switches nil "\
*List of strings to pass as extra switch args to lpr when it is invoked.")
;;;###autoload
(defconst lpr-command (if (memq system-type '(usg-unix-v hpux silicon-graphics-unix)) "lp" "lpr") "\
*Shell command for printing a file")
(defvar print-region-function nil
"Function to call to print the region on a printer.
See definition of `print-region-1' for calling conventions.")
;;;###autoload
(defun lpr-buffer ()
"Print buffer contents as with Unix command `lpr'.
`lpr-switches' is a list of extra switches (strings) to pass to lpr."
(interactive)
(print-region-1 (point-min) (point-max) lpr-switches nil))
;;;###autoload
(defun print-buffer ()
"Print buffer contents as with Unix command `lpr -p'.
`lpr-switches' is a list of extra switches (strings) to pass to lpr."
(interactive)
(print-region-1 (point-min) (point-max) lpr-switches t))
;;;###autoload
(defun lpr-region (start end)
"Print region contents as with Unix command `lpr'.
`lpr-switches' is a list of extra switches (strings) to pass to lpr."
(interactive "r")
(print-region-1 start end lpr-switches nil))
;;;###autoload
(defun print-region (start end)
"Print region contents as with Unix command `lpr -p'.
`lpr-switches' is a list of extra switches (strings) to pass to lpr."
(interactive "r")
(print-region-1 start end lpr-switches t))
(defun print-region-1 (start end switches page-headers)
(let ((name (concat (buffer-name) " Emacs buffer"))
(width tab-width))
(save-excursion
(message "Spooling...")
(if (/= tab-width 8)
(progn
(print-region-new-buffer start end)
(setq tab-width width)
(untabify (point-min) (point-max))))
(if page-headers
(if (eq system-type 'usg-unix-v)
(progn
(print-region-new-buffer start end)
(call-process-region start end "pr" t t nil))
;; On BSD, use an option to get page headers.
(setq switches (cons "-p" switches))))
(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))
switches)))
(message "Spooling...done"))))
;; 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 (start end)
(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)))))
;;; lpr.el ends here
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