;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING. If not, write to
-;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+;; along with GNU Emacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
;;; Commentary:
;; Commands to send the region or a buffer your printer. Entry points
;; are `lpr-buffer', `print-buffer', lpr-region', or `print-region'; option
-;; variables include `lpr-switches' and `lpr-command'.
+;; variables include `printer-name', `lpr-switches' and `lpr-command'.
;;; Code:
+(defgroup lpr nil
+ "Print Emacs buffer on line printer"
+ :group 'wp)
+
;;;###autoload
-(defvar lpr-switches nil
- "*List of strings to pass as extra switch args to `lpr' when it is invoked.")
+(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.
+
+On MS-DOS and MS-Windows systems, it is the name of a printer device or
+port. 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 a 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 'file ; could use string but then we lose completion for files.
+ :group 'lpr)
-(defvar lpr-add-switches (eq system-type 'berkeley-unix)
- "*Non-nil means construct -T and -J options for the `lpr'.")
+;;;###autoload
+(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)
;;;###autoload
-(defvar lpr-command
+(defcustom lpr-command
(if (memq system-type '(usg-unix-v dgux hpux irix))
"lp" "lpr")
- "*Name of program for printing a file.")
+ "*Name of program for printing a file."
+ :type 'string
+ :group 'lpr)
;; Default is nil, because that enables us to use pr -f
;; which is more reliable than pr with no args, which is what lpr -p does.
-(defvar lpr-headers-switches nil
- "*List of strings to use as options for `lpr' to request page headings.
+(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.")
+and print the result."
+ :type '(repeat (string :tag "Argument"))
+ :group 'lpr)
-(defvar print-region-function nil
+(defcustom print-region-function nil
"Function to call to print the region on a printer.
-See definition of `print-region-1' for calling conventions.")
-
-(defvar lpr-page-header-program "pr"
- "*Name of program for adding page headers to a file.")
-
-(defvar lpr-page-header-switches '("-f")
- "*List of strings to use as options for `lpr-page-header-program'.")
+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)
+
+;; Berkeley systems support -F, and GNU pr supports both -f and -F,
+;; So it looks like -F is a better default.
+(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)
;;;###autoload
(defun lpr-buffer ()
;; and it seems to annoying to do for that MIPS system.
(let ((name (concat (buffer-name) " Emacs buffer"))
(title (concat (buffer-name) " Emacs buffer"))
+ ;; Make pipes use the same coding system as
+ ;; writing the buffer to a file would.
+ (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
(setq start (car new-coords) end (cdr new-coords)))
(apply 'call-process-region start end lpr-page-header-program
t t nil
- (nconc (and lpr-add-switches
- (list "-h" title))
+ (nconc (list "-h" title)
lpr-page-header-switches))
(setq start (point-min) end (point-max))))
(apply (or print-region-function 'call-process-region)
;; These belong in pr if we are using that.
(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))
(cons (point-min) (point-max)))))
(defun printify-region (begin end)
- "Turn nonprinting characters (other than TAB, LF, SPC, RET, and FF)
-in the current buffer into printable representations as control or
-hexadecimal escapes."
+ "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)
(format "\\^%c" (+ c ?@))
(format "\\%02x" c)))))))
+(provide 'lpr)
+
;;; lpr.el ends here