1 ;;; lpr.el --- print Emacs buffer on line printer.
3 ;; Copyright (C) 1985, 1988, 1992, 1994 Free Software Foundation, Inc.
8 ;; This file is part of GNU Emacs.
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)
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.
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
22 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
26 ;; Commands to send the region or a buffer your printer. Entry points
27 ;; are `lpr-buffer', `print-buffer', lpr-region', or `print-region'; option
28 ;; variables include `lpr-switches' and `lpr-command'.
33 (defvar lpr-switches nil
34 "*List of strings to pass as extra switch args to `lpr' when it is invoked.")
36 (defvar lpr-add-options
(eq system-type
'berkeley-unix
)
37 "*Non-nil means construct -T and -J options for the `lpr'.")
41 (if (memq system-type
'(usg-unix-v dgux hpux irix
))
43 "*Name of program for printing a file.")
45 ;; Default is nil, because that enables us to use pr -f
46 ;; which is more reliable than pr with no args, which is what lpr -p does.
47 (defvar lpr-headers-switches nil
48 "*List of strings to use as options for `lpr' to request page headings.
49 If nil, we run `lpr-page-header-program' to make page headings
50 and print the result.")
52 (defvar print-region-function nil
53 "Function to call to print the region on a printer.
54 See definition of `print-region-1' for calling conventions.")
56 (defvar lpr-page-header-program
"pr"
57 "*Name of program for adding page headers to a file.")
59 (defvar lpr-page-header-switches
'("-f")
60 "*List of strings to use as options for `lpr-page-header-program'.")
64 "Print buffer contents as with Unix command `lpr'.
65 `lpr-switches' is a list of extra switches (strings) to pass to lpr."
67 (print-region-1 (point-min) (point-max) lpr-switches nil
))
70 (defun print-buffer ()
71 "Print buffer contents as with Unix command `lpr -p'.
72 `lpr-switches' is a list of extra switches (strings) to pass to lpr."
74 (print-region-1 (point-min) (point-max) lpr-switches t
))
77 (defun lpr-region (start end
)
78 "Print region contents as with Unix command `lpr'.
79 `lpr-switches' is a list of extra switches (strings) to pass to lpr."
81 (print-region-1 start end lpr-switches nil
))
84 (defun print-region (start end
)
85 "Print region contents as with Unix command `lpr -p'.
86 `lpr-switches' is a list of extra switches (strings) to pass to lpr."
88 (print-region-1 start end lpr-switches t
))
90 (defun print-region-1 (start end switches page-headers
)
91 ;; On some MIPS system, having a space in the job name
92 ;; crashes the printer demon. But using dashes looks ugly
93 ;; and it seems to annoying to do for that MIPS system.
94 (let ((name (concat (buffer-name) " Emacs buffer"))
95 (title (concat (buffer-name) " Emacs buffer"))
98 (message "Spooling...")
101 (print-region-new-buffer start end
)
102 (setq tab-width width
)
105 (setq end
(point-marker)))
106 (untabify (point-min) (point-max))))
108 (if lpr-headers-switches
109 ;; It is possible to use an lpr option
110 ;; to get page headers.
111 (setq switches
(append (if (stringp lpr-headers-switches
)
112 (list lpr-headers-switches
)
113 lpr-headers-switches
)
115 ;; Run a separate program to get page headers.
116 (print-region-new-buffer start end
)
117 (call-process-region start end lpr-page-header-program
118 t t lpr-page-header-switches
)
119 (setq start
(point-min) end
(point-max))))
120 (apply (or print-region-function
'call-process-region
)
121 (nconc (list start end lpr-command
123 (nconc (and lpr-add-options
124 (list "-J" name
"-T" title
))
127 (set-marker end nil
))
128 (message "Spooling...done"))))
130 ;; This function copies the text between start and end
131 ;; into a new buffer, makes that buffer current,
132 ;; and sets start and end to the buffer bounds.
133 ;; start and end are used free.
134 (defun print-region-new-buffer (ostart oend
)
135 (or (string= (buffer-name) " *spool temp*")
136 (let ((oldbuf (current-buffer)))
137 (set-buffer (get-buffer-create " *spool temp*"))
138 (widen) (erase-buffer)
139 (insert-buffer-substring oldbuf ostart oend
)
140 (setq start
(point-min) end
(point-max)))))
142 (defun printify-region (begin end
)
143 "Turn nonprinting characters (other than TAB, LF, SPC, RET, and FF)
144 in the current buffer into printable representations as control or
145 hexadecimal escapes."
150 (while (re-search-forward "[\^@-\^h\^k\^n-\^_\177-\377]" end t
)
151 (setq c
(preceding-char))
152 (delete-backward-char 1)
155 (format "\\^%c" (+ c ?
@))
156 (format "\\%02x" c
)))))))