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6594deb0 ER |
1 | ;;; lpr.el --- print Emacs buffer on line printer. |
2 | ||
4ad25e43 | 3 | ;; Copyright (C) 1985, 1988, 1992, 1994, 2001 Free Software Foundation, Inc. |
3a801d0c | 4 | |
4ad25e43 EZ |
5 | ;; Maintainer: FSF |
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 | ||
bdc9238e | 27 | ;; Commands to send the region or a buffer to your printer. Entry points |
e41b2db1 | 28 | ;; are `lpr-buffer', `print-buffer', lpr-region', or `print-region'; option |
8748e3eb | 29 | ;; variables include `printer-name', `lpr-switches' and `lpr-command'. |
e41b2db1 | 30 | |
e5167999 | 31 | ;;; Code: |
d6c7e99a | 32 | |
bdc9238e | 33 | ;;;###autoload |
4ad25e43 EZ |
34 | (defvar lpr-windows-system |
35 | (memq system-type '(emx win32 w32 mswindows ms-dos windows-nt))) | |
36 | ||
bdc9238e | 37 | ;;;###autoload |
4ad25e43 EZ |
38 | (defvar lpr-lp-system |
39 | (memq system-type '(usg-unix-v dgux hpux irix))) | |
40 | ||
41 | ||
c5292bc8 RS |
42 | (defgroup lpr nil |
43 | "Print Emacs buffer on line printer" | |
44 | :group 'wp) | |
45 | ||
4ad25e43 | 46 | |
8748e3eb RS |
47 | ;;;###autoload |
48 | (defcustom printer-name | |
4ad25e43 | 49 | (and lpr-windows-system "PRN") |
8748e3eb RS |
50 | "*The name of a local printer to which data is sent for printing. |
51 | \(Note that PostScript files are sent to `ps-printer-name', which see.\) | |
52 | ||
53 | On Unix-like systems, a string value should be a name understood by | |
8bc62130 AI |
54 | lpr's -P option; otherwise the value should be nil. |
55 | ||
56 | On MS-DOS and MS-Windows systems, a string value is taken as the name of | |
57 | a printer device or port, provided `lpr-command' is set to \"\". | |
58 | Typical non-default settings would be \"LPT1\" to \"LPT3\" for parallel | |
59 | printers, or \"COM1\" to \"COM4\" or \"AUX\" for serial printers, or | |
60 | \"//hostname/printer\" for a shared network printer. You can also set | |
61 | it to the name of a file, in which case the output gets appended to that | |
62 | file. If you want to discard the printed output, set this to \"NUL\"." | |
4ad25e43 EZ |
63 | :type '(choice :menu-tag "Printer Name" |
64 | :tag "Printer Name" | |
65 | (const :tag "Default" nil) | |
66 | ;; could use string but then we lose completion for files. | |
67 | (file :tag "Name")) | |
8748e3eb | 68 | :group 'lpr) |
c5292bc8 | 69 | |
6503cec3 | 70 | ;;;###autoload |
4ad25e43 | 71 | (defcustom lpr-switches nil |
22466c09 | 72 | "*List of strings to pass as extra options for the printer program. |
8748e3eb RS |
73 | It is recommended to set `printer-name' instead of including an explicit |
74 | switch on this list. | |
c5292bc8 RS |
75 | See `lpr-command'." |
76 | :type '(repeat (string :tag "Argument")) | |
77 | :group 'lpr) | |
3a621cfe | 78 | |
7298f3f7 RS |
79 | (defcustom lpr-add-switches (memq system-type '(berkeley-unix gnu/linux)) |
80 | "*Non-nil means construct `-T' and `-J' options for the printer program. | |
22466c09 KH |
81 | These are made assuming that the program is `lpr'; |
82 | if you are using some other incompatible printer program, | |
c5292bc8 RS |
83 | this variable should be nil." |
84 | :type 'boolean | |
85 | :group 'lpr) | |
d6c7e99a | 86 | |
4ad25e43 EZ |
87 | (defcustom lpr-printer-switch |
88 | (if lpr-lp-system | |
89 | "-d " | |
90 | "-P") | |
91 | "*Printer switch, that is, something like \"-P\", \"-d \", \"/D:\", etc. | |
92 | This switch is used in conjunction with `printer-name'." | |
93 | :type '(choice :menu-tag "Printer Name Switch" | |
94 | :tag "Printer Name Switch" | |
95 | (const :tag "None" nil) | |
96 | (string :tag "Printer Switch")) | |
97 | :group 'lpr) | |
98 | ||
910476ef | 99 | ;;;###autoload |
c5292bc8 | 100 | (defcustom lpr-command |
8bc62130 | 101 | (cond |
4ad25e43 | 102 | (lpr-windows-system |
8bc62130 | 103 | "") |
4ad25e43 | 104 | (lpr-lp-system |
8bc62130 AI |
105 | "lp") |
106 | (t | |
107 | "lpr")) | |
108 | "*Name of program for printing a file. | |
109 | ||
110 | On MS-DOS and MS-Windows systems, if the value is an empty string then | |
111 | Emacs will write directly to the printer port named by `printer-name'. | |
112 | The programs `print' and `nprint' (the standard print programs on | |
113 | Windows NT and Novell Netware respectively) are handled specially, using | |
114 | `printer-name' as the destination for output; any other program is | |
115 | treated like `lpr' except that an explicit filename is given as the last | |
116 | argument." | |
c5292bc8 RS |
117 | :type 'string |
118 | :group 'lpr) | |
d6c7e99a | 119 | |
7173ec77 RS |
120 | ;; Default is nil, because that enables us to use pr -f |
121 | ;; which is more reliable than pr with no args, which is what lpr -p does. | |
c5292bc8 | 122 | (defcustom lpr-headers-switches nil |
5526cfde | 123 | "*List of strings of options to request page headings in the printer program. |
7173ec77 | 124 | If nil, we run `lpr-page-header-program' to make page headings |
c5292bc8 RS |
125 | and print the result." |
126 | :type '(repeat (string :tag "Argument")) | |
127 | :group 'lpr) | |
3a621cfe | 128 | |
c5292bc8 | 129 | (defcustom print-region-function nil |
d6c7e99a | 130 | "Function to call to print the region on a printer. |
c5292bc8 | 131 | See definition of `print-region-1' for calling conventions." |
53c9f0fa | 132 | :type '(choice (const nil) function) |
c5292bc8 | 133 | :group 'lpr) |
d6c7e99a | 134 | |
c5292bc8 RS |
135 | (defcustom lpr-page-header-program "pr" |
136 | "*Name of program for adding page headers to a file." | |
137 | :type 'string | |
138 | :group 'lpr) | |
c820123b | 139 | |
bafa1a69 RS |
140 | ;; Berkeley systems support -F, and GNU pr supports both -f and -F, |
141 | ;; So it looks like -F is a better default. | |
9f84479b | 142 | (defcustom lpr-page-header-switches '("-F") |
5526cfde | 143 | "*List of strings to use as options for the page-header-generating program. |
c5292bc8 RS |
144 | The variable `lpr-page-header-program' specifies the program to use." |
145 | :type '(repeat string) | |
146 | :group 'lpr) | |
c820123b | 147 | |
7229064d | 148 | ;;;###autoload |
d6c7e99a | 149 | (defun lpr-buffer () |
d7e110e4 RS |
150 | "Print buffer contents without pagination or page headers. |
151 | See the variables `lpr-switches' and `lpr-command' | |
152 | for customization of the printer command." | |
d6c7e99a RS |
153 | (interactive) |
154 | (print-region-1 (point-min) (point-max) lpr-switches nil)) | |
155 | ||
7229064d | 156 | ;;;###autoload |
d6c7e99a | 157 | (defun print-buffer () |
e20192f4 | 158 | "Paginate and print buffer contents. |
e20192f4 | 159 | |
d7e110e4 RS |
160 | The variable `lpr-headers-switches' controls how to paginate. |
161 | If it is nil (the default), we run the `pr' program (or whatever program | |
162 | `lpr-page-header-program' specifies) to paginate. | |
163 | `lpr-page-header-switches' specifies the switches for that program. | |
164 | ||
165 | Otherwise, the switches in `lpr-headers-switches' are used | |
166 | in the print command itself; we expect them to request pagination. | |
167 | ||
168 | See the variables `lpr-switches' and `lpr-command' | |
169 | for further customization of the printer command." | |
d6c7e99a RS |
170 | (interactive) |
171 | (print-region-1 (point-min) (point-max) lpr-switches t)) | |
172 | ||
7229064d | 173 | ;;;###autoload |
d6c7e99a | 174 | (defun lpr-region (start end) |
d7e110e4 RS |
175 | "Print region contents without pagination or page headers. |
176 | See the variables `lpr-switches' and `lpr-command' | |
177 | for customization of the printer command." | |
d6c7e99a RS |
178 | (interactive "r") |
179 | (print-region-1 start end lpr-switches nil)) | |
180 | ||
7229064d | 181 | ;;;###autoload |
d6c7e99a | 182 | (defun print-region (start end) |
d7e110e4 RS |
183 | "Paginate and print the region contents. |
184 | ||
185 | The variable `lpr-headers-switches' controls how to paginate. | |
186 | If it is nil (the default), we run the `pr' program (or whatever program | |
187 | `lpr-page-header-program' specifies) to paginate. | |
188 | `lpr-page-header-switches' specifies the switches for that program. | |
189 | ||
190 | Otherwise, the switches in `lpr-headers-switches' are used | |
191 | in the print command itself; we expect them to request pagination. | |
192 | ||
193 | See the variables `lpr-switches' and `lpr-command' | |
194 | for further customization of the printer command." | |
d6c7e99a RS |
195 | (interactive "r") |
196 | (print-region-1 start end lpr-switches t)) | |
197 | ||
198 | (defun print-region-1 (start end switches page-headers) | |
904d7624 RS |
199 | ;; On some MIPS system, having a space in the job name |
200 | ;; crashes the printer demon. But using dashes looks ugly | |
201 | ;; and it seems to annoying to do for that MIPS system. | |
4ad25e43 | 202 | (let ((name (concat (buffer-name) " Emacs buffer")) |
a8037455 | 203 | (title (concat (buffer-name) " Emacs buffer")) |
0b45d07b EZ |
204 | ;; Make pipes use the same coding system as |
205 | ;; writing the buffer to a file would. | |
4ad25e43 EZ |
206 | (coding-system-for-write (or coding-system-for-write |
207 | buffer-file-coding-system)) | |
208 | (coding-system-for-read (or coding-system-for-read | |
209 | buffer-file-coding-system)) | |
5bbf28a8 | 210 | (width tab-width) |
4ad25e43 | 211 | nswitches |
5bbf28a8 | 212 | switch-string) |
d6c7e99a | 213 | (save-excursion |
4ad25e43 EZ |
214 | (and page-headers lpr-headers-switches |
215 | ;; It's possible to use an lpr option to get page headers. | |
216 | (setq switches (append (if (stringp lpr-headers-switches) | |
217 | (list lpr-headers-switches) | |
218 | lpr-headers-switches) | |
219 | switches))) | |
220 | (setq nswitches (lpr-flatten-list | |
221 | (mapcar 'lpr-eval-switch ; Dynamic evaluation | |
222 | switches)) | |
223 | switch-string (if switches | |
224 | (concat " with options " | |
225 | (mapconcat 'identity switches " ")) | |
226 | "")) | |
5bbf28a8 | 227 | (message "Spooling%s..." switch-string) |
d6c7e99a | 228 | (if (/= tab-width 8) |
8fa64b34 | 229 | (let ((new-coords (print-region-new-buffer start end))) |
4ad25e43 EZ |
230 | (setq start (car new-coords) |
231 | end (cdr new-coords) | |
232 | tab-width width) | |
2adf4f61 RS |
233 | (save-excursion |
234 | (goto-char end) | |
235 | (setq end (point-marker))) | |
d6c7e99a RS |
236 | (untabify (point-min) (point-max)))) |
237 | (if page-headers | |
3a621cfe | 238 | (if lpr-headers-switches |
5bbf28a8 RS |
239 | ;; We handled this above by modifying SWITCHES. |
240 | nil | |
7173ec77 | 241 | ;; Run a separate program to get page headers. |
8fa64b34 | 242 | (let ((new-coords (print-region-new-buffer start end))) |
4ad25e43 EZ |
243 | (apply 'call-process-region (car new-coords) (cdr new-coords) |
244 | lpr-page-header-program t t nil | |
9f84479b RS |
245 | (nconc (list "-h" title) |
246 | lpr-page-header-switches))) | |
4ad25e43 EZ |
247 | (setq start (point-min) |
248 | end (point-max)))) | |
249 | (apply (or print-region-function 'call-process-region) | |
250 | (nconc (list start end lpr-command | |
251 | nil nil nil) | |
252 | (and lpr-add-switches | |
253 | (list "-J" name)) | |
254 | ;; These belong in pr if we are using that. | |
255 | (and lpr-add-switches lpr-headers-switches | |
256 | (list "-T" title)) | |
257 | (and (stringp printer-name) | |
258 | (list (concat lpr-printer-switch | |
259 | printer-name))) | |
260 | nswitches)) | |
2adf4f61 RS |
261 | (if (markerp end) |
262 | (set-marker end nil)) | |
5bbf28a8 | 263 | (message "Spooling%s...done" switch-string)))) |
d6c7e99a RS |
264 | |
265 | ;; This function copies the text between start and end | |
8fa64b34 RS |
266 | ;; into a new buffer, makes that buffer current. |
267 | ;; It returns the new range to print from the new current buffer | |
268 | ;; as (START . END). | |
269 | ||
3a621cfe | 270 | (defun print-region-new-buffer (ostart oend) |
8fa64b34 RS |
271 | (if (string= (buffer-name) " *spool temp*") |
272 | (cons ostart oend) | |
273 | (let ((oldbuf (current-buffer))) | |
274 | (set-buffer (get-buffer-create " *spool temp*")) | |
4ad25e43 EZ |
275 | (widen) |
276 | (erase-buffer) | |
8fa64b34 RS |
277 | (insert-buffer-substring oldbuf ostart oend) |
278 | (cons (point-min) (point-max))))) | |
6594deb0 | 279 | |
1c2df063 | 280 | (defun printify-region (begin end) |
8c44b2ad RS |
281 | "Replace nonprinting characters in region with printable representations. |
282 | The printable representations use ^ (for ASCII control characters) or hex. | |
283 | The characters tab, linefeed, space, return and formfeed are not affected." | |
1c2df063 ER |
284 | (interactive "r") |
285 | (save-excursion | |
286 | (goto-char begin) | |
287 | (let (c) | |
288 | (while (re-search-forward "[\^@-\^h\^k\^n-\^_\177-\377]" end t) | |
289 | (setq c (preceding-char)) | |
290 | (delete-backward-char 1) | |
4ad25e43 EZ |
291 | (insert (if (< c ?\ ) |
292 | (format "\\^%c" (+ c ?@)) | |
293 | (format "\\%02x" c))))))) | |
294 | ||
295 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
296 | ;; Functions hacked from `ps-print' package. | |
297 | ||
298 | ;; Dynamic evaluation | |
299 | (defun lpr-eval-switch (arg) | |
300 | (cond ((stringp arg) arg) | |
301 | ((functionp arg) (apply arg nil)) | |
302 | ((symbolp arg) (symbol-value arg)) | |
303 | ((consp arg) (apply (car arg) (cdr arg))) | |
304 | (t nil))) | |
305 | ||
306 | ;; `lpr-flatten-list' is defined here (copied from "message.el" and | |
307 | ;; enhanced to handle dotted pairs as well) until we can get some | |
308 | ;; sensible autoloads, or `flatten-list' gets put somewhere decent. | |
309 | ||
310 | ;; (lpr-flatten-list '((a . b) c (d . e) (f g h) i . j)) | |
311 | ;; => (a b c d e f g h i j) | |
312 | ||
313 | (defun lpr-flatten-list (&rest list) | |
314 | (lpr-flatten-list-1 list)) | |
315 | ||
316 | (defun lpr-flatten-list-1 (list) | |
317 | (cond | |
318 | ((null list) (list)) | |
319 | ((consp list) | |
320 | (append (lpr-flatten-list-1 (car list)) | |
321 | (lpr-flatten-list-1 (cdr list)))) | |
322 | (t (list list)))) | |
1c2df063 | 323 | |
977b1278 KH |
324 | (provide 'lpr) |
325 | ||
6594deb0 | 326 | ;;; lpr.el ends here |