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- ;;; lpr.el --- print Emacs buffer on line printer.
-
- ;; Copyright (C) 1985, 1988, 1992, 1994 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, Inc., 59 Temple Place - Suite 330,
- ;; Boston, MA 02111-1307, USA.
-
- ;;; Commentary:
-
- ;; Commands to send the region or a buffer your printer. Entry points
- ;; are `lpr-buffer', `print-buffer', lpr-region', or `print-region'; option
- ;; variables include `lpr-switches' and `lpr-command'.
-
- ;;; Code:
-
- ;;;###autoload
- (defvar lpr-switches nil
- "*List of strings to pass as extra options for the printer program.
- See `lpr-command'.")
-
- (defvar lpr-add-switches (eq system-type 'berkeley-unix)
- "*Non-nil means construct -T and -J options for the printer program.
- These are made assuming that the program is `lpr';
- if you are using some other incompatible printer program,
- this variable should be nil.")
-
- ;;;###autoload
- (defvar lpr-command
- (if (memq system-type '(usg-unix-v dgux hpux irix))
- "lp" "lpr")
- "*Name of program for printing a file.")
-
- ;; Default is nil, because that enables us to use pr -f
- ;; which is more reliable than pr with no args, which is what lpr -p does.
- (defvar lpr-headers-switches nil
- "*List of strings of options to request page headings in the printer program.
- If nil, we run `lpr-page-header-program' to make page headings
- and print the result.")
-
- (defvar print-region-function nil
- "Function to call to print the region on a printer.
- See definition of `print-region-1' for calling conventions.")
-
- (defvar lpr-page-header-program "pr"
- "*Name of program for adding page headers to a file.")
-
- (defvar lpr-page-header-switches '("-f")
- "*List of strings to use as options for the page-header-generating program.
- The variable `lpr-page-header-program' specifies the program to use.")
-
- ;;;###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)
- ;; On some MIPS system, having a space in the job name
- ;; crashes the printer demon. But using dashes looks ugly
- ;; and it seems to annoying to do for that MIPS system.
- (let ((name (concat (buffer-name) " Emacs buffer"))
- (title (concat (buffer-name) " Emacs buffer"))
- ;; On MS-DOS systems, make pipes use binary mode if the
- ;; original file is binary.
- (binary-process-input buffer-file-type)
- (binary-process-output buffer-file-type)
- (width tab-width)
- switch-string)
- (save-excursion
- (if page-headers
- (if lpr-headers-switches
- ;; It is possible to use an lpr option
- ;; to get page headers.
- (setq switches (append (if (stringp lpr-headers-switches)
- (list lpr-headers-switches)
- lpr-headers-switches)
- switches))))
- (setq switch-string
- (if switches (concat " with options "
- (mapconcat 'identity switches " "))
- ""))
- (message "Spooling%s..." switch-string)
- (if (/= tab-width 8)
- (let ((new-coords (print-region-new-buffer start end)))
- (setq start (car new-coords) end (cdr new-coords))
- (setq tab-width width)
- (save-excursion
- (goto-char end)
- (setq end (point-marker)))
- (untabify (point-min) (point-max))))
- (if page-headers
- (if lpr-headers-switches
- ;; We handled this above by modifying SWITCHES.
- nil
- ;; Run a separate program to get page headers.
- (let ((new-coords (print-region-new-buffer start end)))
- (setq start (car new-coords) end (cdr new-coords)))
- (apply 'call-process-region start end lpr-page-header-program
- t t nil
- (nconc (and lpr-add-switches
- (list "-h" title))
- lpr-page-header-switches))
- (setq start (point-min) end (point-max))))
- (apply (or print-region-function 'call-process-region)
- (nconc (list start end lpr-command
- nil nil nil)
- (nconc (and lpr-add-switches
- (list "-J" name))
- ;; These belong in pr if we are using that.
- (and lpr-add-switches lpr-headers-switches
- (list "-T" title))
- switches)))
- (if (markerp end)
- (set-marker end nil))
- (message "Spooling%s...done" switch-string))))
-
- ;; This function copies the text between start and end
- ;; into a new buffer, makes that buffer current.
- ;; It returns the new range to print from the new current buffer
- ;; as (START . END).
-
- (defun print-region-new-buffer (ostart oend)
- (if (string= (buffer-name) " *spool temp*")
- (cons ostart oend)
- (let ((oldbuf (current-buffer)))
- (set-buffer (get-buffer-create " *spool temp*"))
- (widen) (erase-buffer)
- (insert-buffer-substring oldbuf ostart oend)
- (cons (point-min) (point-max)))))
-
- (defun printify-region (begin end)
- "Turn nonprinting characters (other than TAB, LF, SPC, RET, and FF)
- in the current buffer into printable representations as control or
- hexadecimal escapes."
- (interactive "r")
- (save-excursion
- (goto-char begin)
- (let (c)
- (while (re-search-forward "[\^@-\^h\^k\^n-\^_\177-\377]" end t)
- (setq c (preceding-char))
- (delete-backward-char 1)
- (insert
- (if (< c ?\ )
- (format "\\^%c" (+ c ?@))
- (format "\\%02x" c)))))))
-
- (provide 'lpr)
-
- ;;; lpr.el ends here
-