Initial revision

lisp/lpr.el

+;; Print Emacs buffer on line printer.
+;; Copyright (C) 1985, 1988 Free Software Foundation, Inc.
+
+;; 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)
+;; 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.
+
+
+;(defconst lpr-switches nil
+;  "*List of strings to pass as extra switch args to lpr when it is invoked.")
+
+(defvar lpr-command (if (eq system-type 'usg-unix-v)
+			"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.")
+
+(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))
+
+(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))
+
+(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))
+
+(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)
+		(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 ()
+  (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)))))