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 (defvar lpr-headers-switches
46 (if (equal lpr-command
"lpr") '("-p") nil
)
47 "*List of strings to use as options for `lpr' to request page headings.")
49 (defvar print-region-function nil
50 "Function to call to print the region on a printer.
51 See definition of `print-region-1' for calling conventions.")
53 (defvar lpr-page-header-program
"pr"
54 "*Name of program for adding page headers to a file.")
56 (defvar lpr-page-header-switches
'("-f")
57 "*List of strings to use as options for `lpr-page-header-program'.")
61 "Print buffer contents as with Unix command `lpr'.
62 `lpr-switches' is a list of extra switches (strings) to pass to lpr."
64 (print-region-1 (point-min) (point-max) lpr-switches nil
))
67 (defun print-buffer ()
68 "Print buffer contents as with Unix command `lpr -p'.
69 `lpr-switches' is a list of extra switches (strings) to pass to lpr."
71 (print-region-1 (point-min) (point-max) lpr-switches t
))
74 (defun lpr-region (start end
)
75 "Print region contents as with Unix command `lpr'.
76 `lpr-switches' is a list of extra switches (strings) to pass to lpr."
78 (print-region-1 start end lpr-switches nil
))
81 (defun print-region (start end
)
82 "Print region contents as with Unix command `lpr -p'.
83 `lpr-switches' is a list of extra switches (strings) to pass to lpr."
85 (print-region-1 start end lpr-switches t
))
87 (defun print-region-1 (start end switches page-headers
)
88 ;; On some MIPS system, having a space in the job name
89 ;; crashes the printer demon. But using dashes looks ugly
90 ;; and it seems to annoying to do for that MIPS system.
91 (let ((name (concat (buffer-name) " Emacs buffer"))
92 (title (concat (buffer-name) " Emacs buffer"))
95 (message "Spooling...")
98 (print-region-new-buffer start end
)
99 (setq tab-width width
)
102 (setq end
(point-marker)))
103 (untabify (point-min) (point-max))))
105 (if lpr-headers-switches
106 ;; On BSD, use an option to get page headers.
107 (setq switches
(append (if (stringp lpr-headers-switches
)
108 (list lpr-headers-switches
)
109 lpr-headers-switches
)
111 (print-region-new-buffer start end
)
112 (call-process-region start end lpr-page-header-program
113 t t lpr-page-header-options
)
114 (setq start
(point-min) end
(point-max))))
115 (apply (or print-region-function
'call-process-region
)
116 (nconc (list start end lpr-command
118 (nconc (and lpr-add-options
119 (list "-J" name
"-T" title
))
122 (set-marker end nil
))
123 (message "Spooling...done"))))
125 ;; This function copies the text between start and end
126 ;; into a new buffer, makes that buffer current,
127 ;; and sets start and end to the buffer bounds.
128 ;; start and end are used free.
129 (defun print-region-new-buffer (ostart oend
)
130 (or (string= (buffer-name) " *spool temp*")
131 (let ((oldbuf (current-buffer)))
132 (set-buffer (get-buffer-create " *spool temp*"))
133 (widen) (erase-buffer)
134 (insert-buffer-substring oldbuf ostart oend
)
135 (setq start
(point-min) end
(point-max)))))
137 (defun printify-region (begin end
)
138 "Turn nonprinting characters (other than TAB, LF, SPC, RET, and FF)
139 in the current buffer into printable representations as control or
140 hexadecimal escapes."
145 (while (re-search-forward "[\^@-\^h\^k\^n-\^_\177-\377]" end t
)
146 (setq c
(preceding-char))
147 (delete-backward-char 1)
150 (format "\\^%c" (+ c ?
@))
151 (format "\\%02x" c
)))))))