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6594deb0 ER |
1 | ;;; lpr.el --- print Emacs buffer on line printer. |
2 | ||
8f1204db | 3 | ;; Copyright (C) 1985, 1988, 1992, 1994 Free Software Foundation, Inc. |
3a801d0c | 4 | |
e5167999 | 5 | ;; Maintainer: FSF |
fd7fa35a | 6 | ;; Keywords: unix |
e5167999 | 7 | |
d6c7e99a RS |
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 | |
e5167999 | 12 | ;; the Free Software Foundation; either version 2, or (at your option) |
d6c7e99a RS |
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 | |
b578f267 EN |
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. | |
d6c7e99a | 24 | |
e41b2db1 ER |
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 | ||
e5167999 | 31 | ;;; Code: |
d6c7e99a | 32 | |
c5292bc8 RS |
33 | (defgroup lpr nil |
34 | "Print Emacs buffer on line printer" | |
35 | :group 'wp) | |
36 | ||
37 | ||
6503cec3 | 38 | ;;;###autoload |
c5292bc8 | 39 | (defcustom lpr-switches nil |
22466c09 | 40 | "*List of strings to pass as extra options for the printer program. |
c5292bc8 RS |
41 | See `lpr-command'." |
42 | :type '(repeat (string :tag "Argument")) | |
43 | :group 'lpr) | |
3a621cfe | 44 | |
c5292bc8 | 45 | (defcustom lpr-add-switches (eq system-type 'berkeley-unix) |
22466c09 KH |
46 | "*Non-nil means construct -T and -J options for the printer program. |
47 | These are made assuming that the program is `lpr'; | |
48 | if you are using some other incompatible printer program, | |
c5292bc8 RS |
49 | this variable should be nil." |
50 | :type 'boolean | |
51 | :group 'lpr) | |
d6c7e99a | 52 | |
910476ef | 53 | ;;;###autoload |
c5292bc8 | 54 | (defcustom lpr-command |
ffc74f20 | 55 | (if (memq system-type '(usg-unix-v dgux hpux irix)) |
9f0a6471 | 56 | "lp" "lpr") |
c5292bc8 RS |
57 | "*Name of program for printing a file." |
58 | :type 'string | |
59 | :group 'lpr) | |
d6c7e99a | 60 | |
7173ec77 RS |
61 | ;; Default is nil, because that enables us to use pr -f |
62 | ;; which is more reliable than pr with no args, which is what lpr -p does. | |
c5292bc8 | 63 | (defcustom lpr-headers-switches nil |
5526cfde | 64 | "*List of strings of options to request page headings in the printer program. |
7173ec77 | 65 | If nil, we run `lpr-page-header-program' to make page headings |
c5292bc8 RS |
66 | and print the result." |
67 | :type '(repeat (string :tag "Argument")) | |
68 | :group 'lpr) | |
3a621cfe | 69 | |
c5292bc8 | 70 | (defcustom print-region-function nil |
d6c7e99a | 71 | "Function to call to print the region on a printer. |
c5292bc8 RS |
72 | See definition of `print-region-1' for calling conventions." |
73 | :type 'function | |
74 | :group 'lpr) | |
d6c7e99a | 75 | |
c5292bc8 RS |
76 | (defcustom lpr-page-header-program "pr" |
77 | "*Name of program for adding page headers to a file." | |
78 | :type 'string | |
79 | :group 'lpr) | |
c820123b | 80 | |
bafa1a69 RS |
81 | ;; Berkeley systems support -F, and GNU pr supports both -f and -F, |
82 | ;; So it looks like -F is a better default. | |
63c7b220 | 83 | (defcustom lpr-page-header-switches '("-F") |
5526cfde | 84 | "*List of strings to use as options for the page-header-generating program. |
c5292bc8 RS |
85 | The variable `lpr-page-header-program' specifies the program to use." |
86 | :type '(repeat string) | |
87 | :group 'lpr) | |
c820123b | 88 | |
7229064d | 89 | ;;;###autoload |
d6c7e99a RS |
90 | (defun lpr-buffer () |
91 | "Print buffer contents as with Unix command `lpr'. | |
92 | `lpr-switches' is a list of extra switches (strings) to pass to lpr." | |
93 | (interactive) | |
94 | (print-region-1 (point-min) (point-max) lpr-switches nil)) | |
95 | ||
7229064d | 96 | ;;;###autoload |
d6c7e99a RS |
97 | (defun print-buffer () |
98 | "Print buffer contents as with Unix command `lpr -p'. | |
99 | `lpr-switches' is a list of extra switches (strings) to pass to lpr." | |
100 | (interactive) | |
101 | (print-region-1 (point-min) (point-max) lpr-switches t)) | |
102 | ||
7229064d | 103 | ;;;###autoload |
d6c7e99a RS |
104 | (defun lpr-region (start end) |
105 | "Print region contents as with Unix command `lpr'. | |
106 | `lpr-switches' is a list of extra switches (strings) to pass to lpr." | |
107 | (interactive "r") | |
108 | (print-region-1 start end lpr-switches nil)) | |
109 | ||
7229064d | 110 | ;;;###autoload |
d6c7e99a RS |
111 | (defun print-region (start end) |
112 | "Print region contents as with Unix command `lpr -p'. | |
113 | `lpr-switches' is a list of extra switches (strings) to pass to lpr." | |
114 | (interactive "r") | |
115 | (print-region-1 start end lpr-switches t)) | |
116 | ||
117 | (defun print-region-1 (start end switches page-headers) | |
904d7624 RS |
118 | ;; On some MIPS system, having a space in the job name |
119 | ;; crashes the printer demon. But using dashes looks ugly | |
120 | ;; and it seems to annoying to do for that MIPS system. | |
121 | (let ((name (concat (buffer-name) " Emacs buffer")) | |
a8037455 | 122 | (title (concat (buffer-name) " Emacs buffer")) |
0b45d07b EZ |
123 | ;; Make pipes use the same coding system as |
124 | ;; writing the buffer to a file would. | |
125 | (coding-system-for-write | |
126 | (or coding-system-for-write buffer-file-coding-system)) | |
127 | (coding-system-for-read | |
128 | (or coding-system-for-read buffer-file-coding-system)) | |
5bbf28a8 RS |
129 | (width tab-width) |
130 | switch-string) | |
d6c7e99a | 131 | (save-excursion |
5bbf28a8 RS |
132 | (if page-headers |
133 | (if lpr-headers-switches | |
134 | ;; It is possible to use an lpr option | |
135 | ;; to get page headers. | |
136 | (setq switches (append (if (stringp lpr-headers-switches) | |
137 | (list lpr-headers-switches) | |
138 | lpr-headers-switches) | |
139 | switches)))) | |
140 | (setq switch-string | |
141 | (if switches (concat " with options " | |
142 | (mapconcat 'identity switches " ")) | |
143 | "")) | |
144 | (message "Spooling%s..." switch-string) | |
d6c7e99a | 145 | (if (/= tab-width 8) |
8fa64b34 RS |
146 | (let ((new-coords (print-region-new-buffer start end))) |
147 | (setq start (car new-coords) end (cdr new-coords)) | |
d6c7e99a | 148 | (setq tab-width width) |
2adf4f61 RS |
149 | (save-excursion |
150 | (goto-char end) | |
151 | (setq end (point-marker))) | |
d6c7e99a RS |
152 | (untabify (point-min) (point-max)))) |
153 | (if page-headers | |
3a621cfe | 154 | (if lpr-headers-switches |
5bbf28a8 RS |
155 | ;; We handled this above by modifying SWITCHES. |
156 | nil | |
7173ec77 | 157 | ;; Run a separate program to get page headers. |
8fa64b34 RS |
158 | (let ((new-coords (print-region-new-buffer start end))) |
159 | (setq start (car new-coords) end (cdr new-coords))) | |
a3324470 RS |
160 | (apply 'call-process-region start end lpr-page-header-program |
161 | t t nil | |
887bbf18 | 162 | (nconc (list "-h" title) |
a3324470 | 163 | lpr-page-header-switches)) |
3a621cfe | 164 | (setq start (point-min) end (point-max)))) |
d6c7e99a RS |
165 | (apply (or print-region-function 'call-process-region) |
166 | (nconc (list start end lpr-command | |
167 | nil nil nil) | |
a3324470 RS |
168 | (nconc (and lpr-add-switches |
169 | (list "-J" name)) | |
170 | ;; These belong in pr if we are using that. | |
171 | (and lpr-add-switches lpr-headers-switches | |
172 | (list "-T" title)) | |
d6c7e99a | 173 | switches))) |
2adf4f61 RS |
174 | (if (markerp end) |
175 | (set-marker end nil)) | |
5bbf28a8 | 176 | (message "Spooling%s...done" switch-string)))) |
d6c7e99a RS |
177 | |
178 | ;; This function copies the text between start and end | |
8fa64b34 RS |
179 | ;; into a new buffer, makes that buffer current. |
180 | ;; It returns the new range to print from the new current buffer | |
181 | ;; as (START . END). | |
182 | ||
3a621cfe | 183 | (defun print-region-new-buffer (ostart oend) |
8fa64b34 RS |
184 | (if (string= (buffer-name) " *spool temp*") |
185 | (cons ostart oend) | |
186 | (let ((oldbuf (current-buffer))) | |
187 | (set-buffer (get-buffer-create " *spool temp*")) | |
188 | (widen) (erase-buffer) | |
189 | (insert-buffer-substring oldbuf ostart oend) | |
190 | (cons (point-min) (point-max))))) | |
6594deb0 | 191 | |
1c2df063 | 192 | (defun printify-region (begin end) |
8c44b2ad RS |
193 | "Replace nonprinting characters in region with printable representations. |
194 | The printable representations use ^ (for ASCII control characters) or hex. | |
195 | The characters tab, linefeed, space, return and formfeed are not affected." | |
1c2df063 ER |
196 | (interactive "r") |
197 | (save-excursion | |
198 | (goto-char begin) | |
199 | (let (c) | |
200 | (while (re-search-forward "[\^@-\^h\^k\^n-\^_\177-\377]" end t) | |
201 | (setq c (preceding-char)) | |
202 | (delete-backward-char 1) | |
203 | (insert | |
204 | (if (< c ?\ ) | |
205 | (format "\\^%c" (+ c ?@)) | |
206 | (format "\\%02x" c))))))) | |
207 | ||
977b1278 KH |
208 | (provide 'lpr) |
209 | ||
6594deb0 | 210 | ;;; lpr.el ends here |