| 1 | ;;; lpr.el --- print Emacs buffer on line printer. |
| 2 | |
| 3 | ;; Copyright (C) 1985, 1988, 1992, 1994 Free Software Foundation, Inc. |
| 4 | |
| 5 | ;; Maintainer: FSF |
| 6 | ;; Keywords: unix |
| 7 | |
| 8 | ;; This file is part of GNU Emacs. |
| 9 | |
| 10 | ;; GNU Emacs is free software; you can redistribute it and/or modify |
| 11 | ;; it under the terms of the GNU General Public License as published by |
| 12 | ;; the Free Software Foundation; either version 2, or (at your option) |
| 13 | ;; any later version. |
| 14 | |
| 15 | ;; GNU Emacs is distributed in the hope that it will be useful, |
| 16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | ;; GNU General Public License for more details. |
| 19 | |
| 20 | ;; You should have received a copy of the GNU General Public License |
| 21 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
| 22 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 23 | ;; Boston, MA 02111-1307, USA. |
| 24 | |
| 25 | ;;; Commentary: |
| 26 | |
| 27 | ;; Commands to send the region or a buffer your printer. Entry points |
| 28 | ;; are `lpr-buffer', `print-buffer', lpr-region', or `print-region'; option |
| 29 | ;; variables include `lpr-switches' and `lpr-command'. |
| 30 | |
| 31 | ;;; Code: |
| 32 | |
| 33 | ;;;###autoload |
| 34 | (defvar lpr-switches nil |
| 35 | "*List of strings to pass as extra options for the printer program. |
| 36 | See `lpr-command'.") |
| 37 | |
| 38 | (defvar lpr-add-switches (eq system-type 'berkeley-unix) |
| 39 | "*Non-nil means construct -T and -J options for the printer program. |
| 40 | These are made assuming that the program is `lpr'; |
| 41 | if you are using some other incompatible printer program, |
| 42 | this variable should be nil.") |
| 43 | |
| 44 | ;;;###autoload |
| 45 | (defvar lpr-command |
| 46 | (if (memq system-type '(usg-unix-v dgux hpux irix)) |
| 47 | "lp" "lpr") |
| 48 | "*Name of program for printing a file.") |
| 49 | |
| 50 | ;; Default is nil, because that enables us to use pr -f |
| 51 | ;; which is more reliable than pr with no args, which is what lpr -p does. |
| 52 | (defvar lpr-headers-switches nil |
| 53 | "*List of strings of options to request page headings in the printer program. |
| 54 | If nil, we run `lpr-page-header-program' to make page headings |
| 55 | and print the result.") |
| 56 | |
| 57 | (defvar print-region-function nil |
| 58 | "Function to call to print the region on a printer. |
| 59 | See definition of `print-region-1' for calling conventions.") |
| 60 | |
| 61 | (defvar lpr-page-header-program "pr" |
| 62 | "*Name of program for adding page headers to a file.") |
| 63 | |
| 64 | (defvar lpr-page-header-switches '("-f") |
| 65 | "*List of strings to use as options for the page-header-generating program. |
| 66 | The variable `lpr-page-header-program' specifies the program to use.") |
| 67 | |
| 68 | ;;;###autoload |
| 69 | (defun lpr-buffer () |
| 70 | "Print buffer contents as with Unix command `lpr'. |
| 71 | `lpr-switches' is a list of extra switches (strings) to pass to lpr." |
| 72 | (interactive) |
| 73 | (print-region-1 (point-min) (point-max) lpr-switches nil)) |
| 74 | |
| 75 | ;;;###autoload |
| 76 | (defun print-buffer () |
| 77 | "Print buffer contents as with Unix command `lpr -p'. |
| 78 | `lpr-switches' is a list of extra switches (strings) to pass to lpr." |
| 79 | (interactive) |
| 80 | (print-region-1 (point-min) (point-max) lpr-switches t)) |
| 81 | |
| 82 | ;;;###autoload |
| 83 | (defun lpr-region (start end) |
| 84 | "Print region contents as with Unix command `lpr'. |
| 85 | `lpr-switches' is a list of extra switches (strings) to pass to lpr." |
| 86 | (interactive "r") |
| 87 | (print-region-1 start end lpr-switches nil)) |
| 88 | |
| 89 | ;;;###autoload |
| 90 | (defun print-region (start end) |
| 91 | "Print region contents as with Unix command `lpr -p'. |
| 92 | `lpr-switches' is a list of extra switches (strings) to pass to lpr." |
| 93 | (interactive "r") |
| 94 | (print-region-1 start end lpr-switches t)) |
| 95 | |
| 96 | (defun print-region-1 (start end switches page-headers) |
| 97 | ;; On some MIPS system, having a space in the job name |
| 98 | ;; crashes the printer demon. But using dashes looks ugly |
| 99 | ;; and it seems to annoying to do for that MIPS system. |
| 100 | (let ((name (concat (buffer-name) " Emacs buffer")) |
| 101 | (title (concat (buffer-name) " Emacs buffer")) |
| 102 | ;; On MS-DOS systems, make pipes use binary mode if the |
| 103 | ;; original file is binary. |
| 104 | (binary-process-input buffer-file-type) |
| 105 | (binary-process-output buffer-file-type) |
| 106 | (width tab-width) |
| 107 | switch-string) |
| 108 | (save-excursion |
| 109 | (if page-headers |
| 110 | (if lpr-headers-switches |
| 111 | ;; It is possible to use an lpr option |
| 112 | ;; to get page headers. |
| 113 | (setq switches (append (if (stringp lpr-headers-switches) |
| 114 | (list lpr-headers-switches) |
| 115 | lpr-headers-switches) |
| 116 | switches)))) |
| 117 | (setq switch-string |
| 118 | (if switches (concat " with options " |
| 119 | (mapconcat 'identity switches " ")) |
| 120 | "")) |
| 121 | (message "Spooling%s..." switch-string) |
| 122 | (if (/= tab-width 8) |
| 123 | (let ((new-coords (print-region-new-buffer start end))) |
| 124 | (setq start (car new-coords) end (cdr new-coords)) |
| 125 | (setq tab-width width) |
| 126 | (save-excursion |
| 127 | (goto-char end) |
| 128 | (setq end (point-marker))) |
| 129 | (untabify (point-min) (point-max)))) |
| 130 | (if page-headers |
| 131 | (if lpr-headers-switches |
| 132 | ;; We handled this above by modifying SWITCHES. |
| 133 | nil |
| 134 | ;; Run a separate program to get page headers. |
| 135 | (let ((new-coords (print-region-new-buffer start end))) |
| 136 | (setq start (car new-coords) end (cdr new-coords))) |
| 137 | (apply 'call-process-region start end lpr-page-header-program |
| 138 | t t nil |
| 139 | (nconc (and lpr-add-switches |
| 140 | (list "-h" title)) |
| 141 | lpr-page-header-switches)) |
| 142 | (setq start (point-min) end (point-max)))) |
| 143 | (apply (or print-region-function 'call-process-region) |
| 144 | (nconc (list start end lpr-command |
| 145 | nil nil nil) |
| 146 | (nconc (and lpr-add-switches |
| 147 | (list "-J" name)) |
| 148 | ;; These belong in pr if we are using that. |
| 149 | (and lpr-add-switches lpr-headers-switches |
| 150 | (list "-T" title)) |
| 151 | switches))) |
| 152 | (if (markerp end) |
| 153 | (set-marker end nil)) |
| 154 | (message "Spooling%s...done" switch-string)))) |
| 155 | |
| 156 | ;; This function copies the text between start and end |
| 157 | ;; into a new buffer, makes that buffer current. |
| 158 | ;; It returns the new range to print from the new current buffer |
| 159 | ;; as (START . END). |
| 160 | |
| 161 | (defun print-region-new-buffer (ostart oend) |
| 162 | (if (string= (buffer-name) " *spool temp*") |
| 163 | (cons ostart oend) |
| 164 | (let ((oldbuf (current-buffer))) |
| 165 | (set-buffer (get-buffer-create " *spool temp*")) |
| 166 | (widen) (erase-buffer) |
| 167 | (insert-buffer-substring oldbuf ostart oend) |
| 168 | (cons (point-min) (point-max))))) |
| 169 | |
| 170 | (defun printify-region (begin end) |
| 171 | "Turn nonprinting characters (other than TAB, LF, SPC, RET, and FF) |
| 172 | in the current buffer into printable representations as control or |
| 173 | hexadecimal escapes." |
| 174 | (interactive "r") |
| 175 | (save-excursion |
| 176 | (goto-char begin) |
| 177 | (let (c) |
| 178 | (while (re-search-forward "[\^@-\^h\^k\^n-\^_\177-\377]" end t) |
| 179 | (setq c (preceding-char)) |
| 180 | (delete-backward-char 1) |
| 181 | (insert |
| 182 | (if (< c ?\ ) |
| 183 | (format "\\^%c" (+ c ?@)) |
| 184 | (format "\\%02x" c))))))) |
| 185 | |
| 186 | (provide 'lpr) |
| 187 | |
| 188 | ;;; lpr.el ends here |