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128 lines
4.2 KiB
EmacsLisp
128 lines
4.2 KiB
EmacsLisp
;;; lpr.el --- print Emacs buffer on line printer.
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;; Copyright (C) 1985, 1988, 1992 Free Software Foundation, Inc.
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;; Maintainer: FSF
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;; Keywords: unix
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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;;; Commentary:
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;; Commands to send the region or a buffer your printer. Entry points
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;; are `lpr-buffer', `print-buffer', lpr-region', or `print-region'; option
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;; variables include `lpr-switches' and `lpr-command'.
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;;; Code:
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;;;###autoload
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(defvar lpr-switches nil
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"*List of strings to pass as extra switch args to lpr when it is invoked.")
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;;;###autoload
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(defvar lpr-command
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(if (memq system-type '(usg-unix-v dgux-unix hpux silicon-graphics-unix))
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"lp" "lpr")
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"*Shell command for printing a file")
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(defvar print-region-function nil
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"Function to call to print the region on a printer.
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See definition of `print-region-1' for calling conventions.")
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;;;###autoload
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(defun lpr-buffer ()
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"Print buffer contents as with Unix command `lpr'.
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`lpr-switches' is a list of extra switches (strings) to pass to lpr."
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(interactive)
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(print-region-1 (point-min) (point-max) lpr-switches nil))
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;;;###autoload
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(defun print-buffer ()
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"Print buffer contents as with Unix command `lpr -p'.
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`lpr-switches' is a list of extra switches (strings) to pass to lpr."
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(interactive)
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(print-region-1 (point-min) (point-max) lpr-switches t))
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;;;###autoload
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(defun lpr-region (start end)
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"Print region contents as with Unix command `lpr'.
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`lpr-switches' is a list of extra switches (strings) to pass to lpr."
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(interactive "r")
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(print-region-1 start end lpr-switches nil))
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;;;###autoload
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(defun print-region (start end)
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"Print region contents as with Unix command `lpr -p'.
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`lpr-switches' is a list of extra switches (strings) to pass to lpr."
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(interactive "r")
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(print-region-1 start end lpr-switches t))
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(defun print-region-1 (start end switches page-headers)
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(let ((name (concat (buffer-name) " Emacs buffer"))
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(width tab-width))
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(save-excursion
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(message "Spooling...")
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(if (/= tab-width 8)
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(progn
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(print-region-new-buffer start end)
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(setq tab-width width)
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(untabify (point-min) (point-max))))
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(if page-headers
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(if (eq system-type 'usg-unix-v)
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(progn
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(print-region-new-buffer start end)
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(call-process-region start end "pr" t t nil))
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;; On BSD, use an option to get page headers.
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(setq switches (cons "-p" switches))))
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(apply (or print-region-function 'call-process-region)
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(nconc (list start end lpr-command
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nil nil nil)
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(nconc (and (eq system-type 'berkeley-unix)
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(list "-J" name "-T" name))
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switches)))
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(message "Spooling...done"))))
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;; This function copies the text between start and end
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;; into a new buffer, makes that buffer current,
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;; and sets start and end to the buffer bounds.
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;; start and end are used free.
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(defun print-region-new-buffer (start end)
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(or (string= (buffer-name) " *spool temp*")
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(let ((oldbuf (current-buffer)))
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(set-buffer (get-buffer-create " *spool temp*"))
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(widen) (erase-buffer)
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(insert-buffer-substring oldbuf start end)
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(setq start (point-min) end (point-max)))))
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(defun printify-region (begin end)
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"Turn nonprinting characters (other than TAB, LF, SPC, RET, and FF)
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in the current buffer into printable representations as control or
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hexadecimal escapes."
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(interactive "r")
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(save-excursion
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(goto-char begin)
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(let (c)
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(while (re-search-forward "[\^@-\^h\^k\^n-\^_\177-\377]" end t)
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(setq c (preceding-char))
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(delete-backward-char 1)
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(insert
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(if (< c ?\ )
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(format "\\^%c" (+ c ?@))
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(format "\\%02x" c)))))))
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;;; lpr.el ends here
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