lisp/lpr.el

   1 ;; Print Emacs buffer on line printer.
   2 ;; Copyright (C) 1985, 1988 Free Software Foundation, Inc.
   3
   4 ;; This file is part of GNU Emacs.
   5
   6 ;; GNU Emacs is free software; you can redistribute it and/or modify
   7 ;; it under the terms of the GNU General Public License as published by
   8 ;; the Free Software Foundation; either version 1, or (at your option)
   9 ;; any later version.
  10
  11 ;; GNU Emacs is distributed in the hope that it will be useful,
  12 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 ;; GNU General Public License for more details.
  15
  16 ;; You should have received a copy of the GNU General Public License
  17 ;; along with GNU Emacs; see the file COPYING.  If not, write to
  18 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  19
  20
  21 ;;;###autoload
  22 (defconst lpr-switches nil "\
  23 *List of strings to pass as extra switch args to lpr when it is invoked.")
  24
  25 (defvar lpr-command (if (eq system-type 'usg-unix-v)
  26                         "lp" "lpr")
  27   "Shell command for printing a file")
  28
  29 (defvar print-region-function nil
  30   "Function to call to print the region on a printer.
  31 See definition of `print-region-1' for calling conventions.")
  32
  33 ;;;###autoload
  34 (defun lpr-buffer ()
  35   "Print buffer contents as with Unix command `lpr'.
  36 `lpr-switches' is a list of extra switches (strings) to pass to lpr."
  37   (interactive)
  38   (print-region-1 (point-min) (point-max) lpr-switches nil))
  39
  40 ;;;###autoload
  41 (defun print-buffer ()
  42   "Print buffer contents as with Unix command `lpr -p'.
  43 `lpr-switches' is a list of extra switches (strings) to pass to lpr."
  44   (interactive)
  45   (print-region-1 (point-min) (point-max) lpr-switches t))
  46
  47 ;;;###autoload
  48 (defun lpr-region (start end)
  49   "Print region contents as with Unix command `lpr'.
  50 `lpr-switches' is a list of extra switches (strings) to pass to lpr."
  51   (interactive "r")
  52   (print-region-1 start end lpr-switches nil))
  53
  54 ;;;###autoload
  55 (defun print-region (start end)
  56   "Print region contents as with Unix command `lpr -p'.
  57 `lpr-switches' is a list of extra switches (strings) to pass to lpr."
  58   (interactive "r")
  59   (print-region-1 start end lpr-switches t))
  60
  61 (defun print-region-1 (start end switches page-headers)
  62   (let ((name (concat (buffer-name) " Emacs buffer"))
  63         (width tab-width))
  64     (save-excursion
  65       (message "Spooling...")
  66       (if (/= tab-width 8)
  67           (progn
  68             (print-region-new-buffer start end)
  69             (setq tab-width width)
  70             (untabify (point-min) (point-max))))
  71       (if page-headers
  72           (if (eq system-type 'usg-unix-v)
  73               (progn
  74                 (print-region-new-buffer)
  75                 (call-process-region start end "pr" t t nil))
  76             ;; On BSD, use an option to get page headers.
  77             (setq switches (cons "-p" switches))))
  78       (apply (or print-region-function 'call-process-region)
  79              (nconc (list start end lpr-command
  80                           nil nil nil)
  81                     (nconc (and (eq system-type 'berkeley-unix)
  82                                 (list "-J" name "-T" name))
  83                            switches)))
  84       (message "Spooling...done"))))
  85
  86 ;; This function copies the text between start and end
  87 ;; into a new buffer, makes that buffer current,
  88 ;; and sets start and end to the buffer bounds.
  89 ;; start and end are used free.
  90 (defun print-region-new-buffer ()
  91   (or (string= (buffer-name) " *spool temp*")
  92       (let ((oldbuf (current-buffer)))
  93         (set-buffer (get-buffer-create " *spool temp*"))
  94         (widen) (erase-buffer)
  95         (insert-buffer-substring oldbuf start end)
  96         (setq start (point-min) end (point-max)))))