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+;;; -*-Scheme-*-
+;;;
+;;;    $Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/edwin/print.scm,v 1.1 1991/09/20 20:46:48 arthur Exp $
+;;;
+;;;    Copyright (c) 1991 Massachusetts Institute of Technology
+;;;
+;;;    This material was developed by the Scheme project at the
+;;;    Massachusetts Institute of Technology, Department of
+;;;    Electrical Engineering and Computer Science.  Permission to
+;;;    copy this software, to redistribute it, and to use it for any
+;;;    purpose is granted, subject to the following restrictions and
+;;;    understandings.
+;;;
+;;;    1. Any copy made of this software must include this copyright
+;;;    notice in full.
+;;;
+;;;    2. Users of this software agree to make their best efforts (a)
+;;;    to return to the MIT Scheme project any improvements or
+;;;    extensions that they make, so that these may be included in
+;;;    future releases; and (b) to inform MIT of noteworthy uses of
+;;;    this software.
+;;;
+;;;    3. All materials developed as a consequence of the use of this
+;;;    software shall duly acknowledge such use, in accordance with
+;;;    the usual standards of acknowledging credit in academic
+;;;    research.
+;;;
+;;;    4. MIT has made no warrantee or representation that the
+;;;    operation of this software will be error-free, and MIT is
+;;;    under no obligation to provide any services, by way of
+;;;    maintenance, update, or otherwise.
+;;;
+;;;    5. In conjunction with products arising from the use of this
+;;;    material, there shall be no use of the name of the
+;;;    Massachusetts Institute of Technology nor of any adaptation
+;;;    thereof in any advertising, promotional, or sales literature
+;;;    without prior written consent from MIT in each case.
+;;;
+;;; NOTE: Parts of this program (Edwin) were created by translation
+;;; from corresponding parts of GNU Emacs.  Users should be aware that
+;;; the GNU GENERAL PUBLIC LICENSE may apply to these parts.  A copy
+;;; of that license should have been included along with this file.
+;;;
+
+;;;; Print Buffers and Regions
+
+(declare (usual-integrations))
+\f
+(define-variable lpr-switches
+  "List of strings to pass as extra switch args to lpr when it is invoked."
+  '()
+  list-of-strings?)
+
+(define-variable lpr-command
+  "Shell command for printing a file"
+  "lpr"
+  string?)
+
+(define-command lpr-buffer
+  "Print buffer contents as with Unix command `lpr'.
+Variable LPR-SWITCHES is a list of extra switches (strings) to pass to lpr."
+  '()
+  (lambda ()
+    (print-region/internal (buffer-region (current-buffer))
+                          (ref-variable lpr-switches))))
+
+(define-command print-buffer
+  "Print buffer contents as with Unix command `lpr -p'.
+Variable LPR-SWITCHES is a list of extra switches (strings) to pass to lpr."
+  '()
+  (lambda ()
+    (print-region/internal (buffer-region (current-buffer))
+                          (cons "-p" (ref-variable lpr-switches)))))
+
+(define-command lpr-region
+  "Print region contents as with Unix command `lpr'.
+Variable LPR-SWITCHES is a list of extra switches (strings) to pass to lpr."
+  "r"
+  (lambda  (region)
+    (print-region/internal region (ref-variable lpr-switches))))
+
+(define-command print-region
+  "Print region contents as with Unix command `lpr -p'.
+Variable LPR-SWITCHES is a list of extra switches (strings) to pass to lpr."
+  "r"
+  (lambda  (region)
+    (print-region/internal region (cons "-p" (ref-variable lpr-switches)))))
+
+(define (switches->string switches)
+  (if (null? switches)
+      ""
+      (apply string-append
+            (cons (car switches)
+                  (let loop ((remaining (cdr switches)))
+                    (if (null? remaining)
+                        '("")
+                        (cons " "
+                              (cons (car remaining)
+                                    (loop (cdr remaining))))))))))
+
+(define (print-region/internal region switches)
+  (let ((name (string-append (buffer-name (current-buffer))
+                            " Emacs buffer"))
+       (width (ref-variable tab-width)))
+    (let ((buffer (temporary-buffer " *spool temp*")))
+      (message "Spooling...")
+      (region-insert-string! (buffer-point buffer)
+                            (region->string region))
+      (if (not (= width 8))
+         (begin (with-selected-buffer buffer
+                  (lambda ()
+                    (local-set-variable! tab-width width)))
+                (untabify-region (region-start region) (region-end region))))
+      (shell-command-region
+       (string-append (ref-variable lpr-command (current-buffer))
+                     " "
+                     (switches->string switches))
+       (buffer-end buffer)
+       region)
+      (message "Spooling...done"))))
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