(defgroup lpr nil
"Print Emacs buffer on line printer"
:group 'wp)
(defcustom printer-name
(if (memq system-type '(ms-dos windows-nt)) "PRN")
"*The name of a local printer to which data is sent for printing.
\(Note that PostScript files are sent to `ps-printer-name', which see.\)
On Unix-like systems, a string value should be a name understood by
lpr's -P option; otherwise the value should be nil.
On MS-DOS and MS-Windows systems, a string value is taken as the name of
a printer device or port, provided `lpr-command' is set to \"\".
Typical non-default settings would be \"LPT1\" to \"LPT3\" for parallel
printers, or \"COM1\" to \"COM4\" or \"AUX\" for serial printers, or
\"//hostname/printer\" for a shared network printer. You can also set
it to the name of a file, in which case the output gets appended to that
file. If you want to discard the printed output, set this to \"NUL\"."
:type '(choice (file :tag "Name")
(const :tag "Default" nil))
:group 'lpr)
(defcustom lpr-switches nil
"*List of strings to pass as extra options for the printer program.
It is recommended to set `printer-name' instead of including an explicit
switch on this list.
See `lpr-command'."
:type '(repeat (string :tag "Argument"))
:group 'lpr)
(defcustom lpr-add-switches (eq system-type 'berkeley-unix)
"*Non-nil means construct -T and -J options for the printer program.
These are made assuming that the program is `lpr';
if you are using some other incompatible printer program,
this variable should be nil."
:type 'boolean
:group 'lpr)
(defcustom lpr-command
(cond
((memq system-type '(ms-dos windows-nt))
"")
((memq system-type '(usg-unix-v dgux hpux irix))
"lp")
(t
"lpr"))
"*Name of program for printing a file.
On MS-DOS and MS-Windows systems, if the value is an empty string then
Emacs will write directly to the printer port named by `printer-name'.
The programs `print' and `nprint' (the standard print programs on
Windows NT and Novell Netware respectively) are handled specially, using
`printer-name' as the destination for output; any other program is
treated like `lpr' except that an explicit filename is given as the last
argument."
:type 'string
:group 'lpr)
(defcustom lpr-headers-switches nil
"*List of strings of options to request page headings in the printer program.
If nil, we run `lpr-page-header-program' to make page headings
and print the result."
:type '(repeat (string :tag "Argument"))
:group 'lpr)
(defcustom print-region-function nil
"Function to call to print the region on a printer.
See definition of `print-region-1' for calling conventions."
:type 'function
:group 'lpr)
(defcustom lpr-page-header-program "pr"
"*Name of program for adding page headers to a file."
:type 'string
:group 'lpr)
(defcustom lpr-page-header-switches '("-F")
"*List of strings to use as options for the page-header-generating program.
The variable `lpr-page-header-program' specifies the program to use."
:type '(repeat string)
:group 'lpr)
(defun lpr-buffer ()
"Print buffer contents as with Unix command `lpr'.
`lpr-switches' is a list of extra switches (strings) to pass to lpr."
(interactive)
(print-region-1 (point-min) (point-max) lpr-switches nil))
(defun print-buffer ()
"Print buffer contents as with Unix command `lpr -p'.
`lpr-switches' is a list of extra switches (strings) to pass to lpr."
(interactive)
(print-region-1 (point-min) (point-max) lpr-switches t))
(defun lpr-region (start end)
"Print region contents as with Unix command `lpr'.
`lpr-switches' is a list of extra switches (strings) to pass to lpr."
(interactive "r")
(print-region-1 start end lpr-switches nil))
(defun print-region (start end)
"Print region contents as with Unix command `lpr -p'.
`lpr-switches' is a list of extra switches (strings) to pass to lpr."
(interactive "r")
(print-region-1 start end lpr-switches t))
(defun print-region-1 (start end switches page-headers)
(let ((name (concat (buffer-name) " Emacs buffer"))
(title (concat (buffer-name) " Emacs buffer"))
(coding-system-for-write
(or coding-system-for-write buffer-file-coding-system))
(coding-system-for-read
(or coding-system-for-read buffer-file-coding-system))
(width tab-width)
switch-string)
(save-excursion
(if page-headers
(if lpr-headers-switches
(setq switches (append (if (stringp lpr-headers-switches)
(list lpr-headers-switches)
lpr-headers-switches)
switches))))
(setq switch-string
(if switches (concat " with options "
(mapconcat 'identity switches " "))
""))
(message "Spooling%s..." switch-string)
(if (/= tab-width 8)
(let ((new-coords (print-region-new-buffer start end)))
(setq start (car new-coords) end (cdr new-coords))
(setq tab-width width)
(save-excursion
(goto-char end)
(setq end (point-marker)))
(untabify (point-min) (point-max))))
(if page-headers
(if lpr-headers-switches
nil
(let ((new-coords (print-region-new-buffer start end)))
(setq start (car new-coords) end (cdr new-coords)))
(apply 'call-process-region start end lpr-page-header-program
t t nil
(nconc (list "-h" title)
lpr-page-header-switches))
(setq start (point-min) end (point-max))))
(apply (or print-region-function 'call-process-region)
(nconc (list start end lpr-command
nil nil nil)
(nconc (and lpr-add-switches
(list "-J" name))
(and lpr-add-switches lpr-headers-switches
(list "-T" title))
(and (stringp printer-name)
(list (concat "-P" printer-name)))
switches)))
(if (markerp end)
(set-marker end nil))
(message "Spooling%s...done" switch-string))))
(defun print-region-new-buffer (ostart oend)
(if (string= (buffer-name) " *spool temp*")
(cons ostart oend)
(let ((oldbuf (current-buffer)))
(set-buffer (get-buffer-create " *spool temp*"))
(widen) (erase-buffer)
(insert-buffer-substring oldbuf ostart oend)
(cons (point-min) (point-max)))))
(defun printify-region (begin end)
"Replace nonprinting characters in region with printable representations.
The printable representations use ^ (for ASCII control characters) or hex.
The characters tab, linefeed, space, return and formfeed are not affected."
(interactive "r")
(save-excursion
(goto-char begin)
(let (c)
(while (re-search-forward "[\^@-\^h\^k\^n-\^_\177-\377]" end t)
(setq c (preceding-char))
(delete-backward-char 1)
(insert
(if (< c ?\ )
(format "\\^%c" (+ c ?@))
(format "\\%02x" c)))))))
(provide 'lpr)