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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 | |
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. | |
23 | ||
e41b2db1 ER |
24 | ;;; Commentary: |
25 | ||
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'. | |
29 | ||
e5167999 | 30 | ;;; Code: |
d6c7e99a | 31 | |
6503cec3 | 32 | ;;;###autoload |
7114f404 | 33 | (defvar lpr-switches nil |
22466c09 KH |
34 | "*List of strings to pass as extra options for the printer program. |
35 | See `lpr-command'.") | |
3a621cfe | 36 | |
a3324470 | 37 | (defvar lpr-add-switches (eq system-type 'berkeley-unix) |
22466c09 KH |
38 | "*Non-nil means construct -T and -J options for the printer program. |
39 | These are made assuming that the program is `lpr'; | |
40 | if you are using some other incompatible printer program, | |
41 | this variable should be nil.") | |
d6c7e99a | 42 | |
910476ef | 43 | ;;;###autoload |
7114f404 | 44 | (defvar lpr-command |
ffc74f20 | 45 | (if (memq system-type '(usg-unix-v dgux hpux irix)) |
9f0a6471 | 46 | "lp" "lpr") |
c820123b | 47 | "*Name of program for printing a file.") |
d6c7e99a | 48 | |
7173ec77 RS |
49 | ;; Default is nil, because that enables us to use pr -f |
50 | ;; which is more reliable than pr with no args, which is what lpr -p does. | |
51 | (defvar lpr-headers-switches nil | |
52 | "*List of strings to use as options for `lpr' to request page headings. | |
53 | If nil, we run `lpr-page-header-program' to make page headings | |
54 | and print the result.") | |
3a621cfe | 55 | |
d6c7e99a RS |
56 | (defvar print-region-function nil |
57 | "Function to call to print the region on a printer. | |
ac5b56bc | 58 | See definition of `print-region-1' for calling conventions.") |
d6c7e99a | 59 | |
c820123b RS |
60 | (defvar lpr-page-header-program "pr" |
61 | "*Name of program for adding page headers to a file.") | |
62 | ||
3cdcc611 | 63 | (defvar lpr-page-header-switches '("-f") |
c820123b RS |
64 | "*List of strings to use as options for `lpr-page-header-program'.") |
65 | ||
7229064d | 66 | ;;;###autoload |
d6c7e99a RS |
67 | (defun lpr-buffer () |
68 | "Print buffer contents as with Unix command `lpr'. | |
69 | `lpr-switches' is a list of extra switches (strings) to pass to lpr." | |
70 | (interactive) | |
71 | (print-region-1 (point-min) (point-max) lpr-switches nil)) | |
72 | ||
7229064d | 73 | ;;;###autoload |
d6c7e99a RS |
74 | (defun print-buffer () |
75 | "Print buffer contents as with Unix command `lpr -p'. | |
76 | `lpr-switches' is a list of extra switches (strings) to pass to lpr." | |
77 | (interactive) | |
78 | (print-region-1 (point-min) (point-max) lpr-switches t)) | |
79 | ||
7229064d | 80 | ;;;###autoload |
d6c7e99a RS |
81 | (defun lpr-region (start end) |
82 | "Print region contents as with Unix command `lpr'. | |
83 | `lpr-switches' is a list of extra switches (strings) to pass to lpr." | |
84 | (interactive "r") | |
85 | (print-region-1 start end lpr-switches nil)) | |
86 | ||
7229064d | 87 | ;;;###autoload |
d6c7e99a RS |
88 | (defun print-region (start end) |
89 | "Print region contents as with Unix command `lpr -p'. | |
90 | `lpr-switches' is a list of extra switches (strings) to pass to lpr." | |
91 | (interactive "r") | |
92 | (print-region-1 start end lpr-switches t)) | |
93 | ||
94 | (defun print-region-1 (start end switches page-headers) | |
904d7624 RS |
95 | ;; On some MIPS system, having a space in the job name |
96 | ;; crashes the printer demon. But using dashes looks ugly | |
97 | ;; and it seems to annoying to do for that MIPS system. | |
98 | (let ((name (concat (buffer-name) " Emacs buffer")) | |
a8037455 | 99 | (title (concat (buffer-name) " Emacs buffer")) |
5bbf28a8 RS |
100 | (width tab-width) |
101 | switch-string) | |
d6c7e99a | 102 | (save-excursion |
5bbf28a8 RS |
103 | (if page-headers |
104 | (if lpr-headers-switches | |
105 | ;; It is possible to use an lpr option | |
106 | ;; to get page headers. | |
107 | (setq switches (append (if (stringp lpr-headers-switches) | |
108 | (list lpr-headers-switches) | |
109 | lpr-headers-switches) | |
110 | switches)))) | |
111 | (setq switch-string | |
112 | (if switches (concat " with options " | |
113 | (mapconcat 'identity switches " ")) | |
114 | "")) | |
115 | (message "Spooling%s..." switch-string) | |
d6c7e99a | 116 | (if (/= tab-width 8) |
8fa64b34 RS |
117 | (let ((new-coords (print-region-new-buffer start end))) |
118 | (setq start (car new-coords) end (cdr new-coords)) | |
d6c7e99a | 119 | (setq tab-width width) |
2adf4f61 RS |
120 | (save-excursion |
121 | (goto-char end) | |
122 | (setq end (point-marker))) | |
d6c7e99a RS |
123 | (untabify (point-min) (point-max)))) |
124 | (if page-headers | |
3a621cfe | 125 | (if lpr-headers-switches |
5bbf28a8 RS |
126 | ;; We handled this above by modifying SWITCHES. |
127 | nil | |
7173ec77 | 128 | ;; Run a separate program to get page headers. |
8fa64b34 RS |
129 | (let ((new-coords (print-region-new-buffer start end))) |
130 | (setq start (car new-coords) end (cdr new-coords))) | |
a3324470 RS |
131 | (apply 'call-process-region start end lpr-page-header-program |
132 | t t nil | |
133 | (nconc (and lpr-add-switches | |
134 | (list "-h" title)) | |
135 | lpr-page-header-switches)) | |
3a621cfe | 136 | (setq start (point-min) end (point-max)))) |
d6c7e99a RS |
137 | (apply (or print-region-function 'call-process-region) |
138 | (nconc (list start end lpr-command | |
139 | nil nil nil) | |
a3324470 RS |
140 | (nconc (and lpr-add-switches |
141 | (list "-J" name)) | |
142 | ;; These belong in pr if we are using that. | |
143 | (and lpr-add-switches lpr-headers-switches | |
144 | (list "-T" title)) | |
d6c7e99a | 145 | switches))) |
2adf4f61 RS |
146 | (if (markerp end) |
147 | (set-marker end nil)) | |
5bbf28a8 | 148 | (message "Spooling%s...done" switch-string)))) |
d6c7e99a RS |
149 | |
150 | ;; This function copies the text between start and end | |
8fa64b34 RS |
151 | ;; into a new buffer, makes that buffer current. |
152 | ;; It returns the new range to print from the new current buffer | |
153 | ;; as (START . END). | |
154 | ||
3a621cfe | 155 | (defun print-region-new-buffer (ostart oend) |
8fa64b34 RS |
156 | (if (string= (buffer-name) " *spool temp*") |
157 | (cons ostart oend) | |
158 | (let ((oldbuf (current-buffer))) | |
159 | (set-buffer (get-buffer-create " *spool temp*")) | |
160 | (widen) (erase-buffer) | |
161 | (insert-buffer-substring oldbuf ostart oend) | |
162 | (cons (point-min) (point-max))))) | |
6594deb0 | 163 | |
1c2df063 ER |
164 | (defun printify-region (begin end) |
165 | "Turn nonprinting characters (other than TAB, LF, SPC, RET, and FF) | |
166 | in the current buffer into printable representations as control or | |
167 | hexadecimal escapes." | |
168 | (interactive "r") | |
169 | (save-excursion | |
170 | (goto-char begin) | |
171 | (let (c) | |
172 | (while (re-search-forward "[\^@-\^h\^k\^n-\^_\177-\377]" end t) | |
173 | (setq c (preceding-char)) | |
174 | (delete-backward-char 1) | |
175 | (insert | |
176 | (if (< c ?\ ) | |
177 | (format "\\^%c" (+ c ?@)) | |
178 | (format "\\%02x" c))))))) | |
179 | ||
977b1278 KH |
180 | (provide 'lpr) |
181 | ||
6594deb0 | 182 | ;;; lpr.el ends here |