(standard-latex-block-names): Add "math".

[emacs.git] / lisp / ps-print.el

;;; ps-print.el --- Print text from the buffer as PostScript

;; Copyright (C) 1993, 2000 Free Software Foundation, Inc.

;; Author:      Jim Thompson (was <thompson@wg2.waii.com>)
;; Author:      Jacques Duthen (was <duthen@cegelec-red.fr>)
;; Author:      Vinicius Jose Latorre <vinicius@cpqd.com.br>
;; Author:      Kenichi Handa <handa@etl.go.jp> (multi-byte characters)
;; Maintainer:  Kenichi Handa <handa@etl.go.jp> (multi-byte characters)
;; Maintainer:  Vinicius Jose Latorre <vinicius@cpqd.com.br>
;; Keywords:    wp, print, PostScript
;; Time-stamp:  <2000/11/01 14:39:00 vinicius>
;; Version:     6.3.1
;; X-URL:       http://www.cpqd.com.br/~vinicius/emacs/

(defconst ps-print-version "6.3.1"
  "ps-print.el, v 6.3.1 <2000/10/30 vinicius>

Vinicius's last change version -- this file may have been edited as part of
Emacs without changes to the version number.  When reporting bugs, please also
report the version of Emacs, if any, that ps-print was distributed with.

Please send all bug fixes and enhancements to
        Vinicius Jose Latorre <vinicius@cpqd.com.br>.
")

;; This file is part of GNU Emacs.

;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; 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, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Commentary:

;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; About ps-print
;; --------------
;;
;; This package provides printing of Emacs buffers on PostScript printers;
;; the buffer's bold and italic text attributes are preserved in the printer
;; output.  ps-print is intended for use with Emacs or Lucid Emacs, together
;; with a fontifying package such as font-lock or hilit.
;;
;; ps-print uses the same face attributes defined through font-lock or hilit
;; to print a PostScript file, but some faces are better seeing on the screen
;; than on paper, specially when you have a black/white PostScript printer.
;;
;; ps-print allows a remap of face to another one that it is better to print,
;; for example, the face font-lock-comment-face (if you are using font-lock)
;; could have bold or italic attribute when printing, besides foreground color.
;; This remap improves printing look (see How Ps-Print Maps Faces).
;;
;;
;; Using ps-print
;; --------------
;;
;; ps-print provides eight commands for generating PostScript images
;; of Emacs buffers:
;;
;;        ps-print-buffer
;;        ps-print-buffer-with-faces
;;        ps-print-region
;;        ps-print-region-with-faces
;;        ps-spool-buffer
;;        ps-spool-buffer-with-faces
;;        ps-spool-region
;;        ps-spool-region-with-faces
;;
;; These commands all perform essentially the same function: they
;; generate PostScript images suitable for printing on a PostScript
;; printer or displaying with GhostScript.  These commands are
;; collectively referred to as "ps-print- commands".
;;
;; The word "print" or "spool" in the command name determines when the
;; PostScript image is sent to the printer:
;;
;;        print      - The PostScript image is immediately sent to the
;;                     printer;
;;
;;        spool      - The PostScript image is saved temporarily in an
;;                     Emacs buffer.  Many images may be spooled locally
;;                     before printing them.  To send the spooled images
;;                     to the printer, use the command `ps-despool'.
;;
;; The spooling mechanism was designed for printing lots of small
;; files (mail messages or netnews articles) to save paper that would
;; otherwise be wasted on banner pages, and to make it easier to find
;; your output at the printer (it's easier to pick up one 50-page
;; printout than to find 50 single-page printouts).
;;
;; ps-print has a hook in the `kill-emacs-hook' so that you won't
;; accidentally quit from Emacs while you have unprinted PostScript
;; waiting in the spool buffer.  If you do attempt to exit with
;; spooled PostScript, you'll be asked if you want to print it, and if
;; you decline, you'll be asked to confirm the exit; this is modeled
;; on the confirmation that Emacs uses for modified buffers.
;;
;; The word "buffer" or "region" in the command name determines how
;; much of the buffer is printed:
;;
;;        buffer     - Print the entire buffer.
;;
;;        region     - Print just the current region.
;;
;; The -with-faces suffix on the command name means that the command
;; will include font, color, and underline information in the
;; PostScript image, so the printed image can look as pretty as the
;; buffer.  The ps-print- commands without the -with-faces suffix
;; don't include font, color, or underline information; images printed
;; with these commands aren't as pretty, but are faster to generate.
;;
;; Two ps-print- command examples:
;;
;;        ps-print-buffer             - print the entire buffer,
;;                                      without font, color, or
;;                                      underline information, and
;;                                      send it immediately to the
;;                                      printer.
;;
;;        ps-spool-region-with-faces  - print just the current region;
;;                                      include font, color, and
;;                                      underline information, and
;;                                      spool the image in Emacs to
;;                                      send to the printer later.
;;
;;
;; Invoking Ps-Print
;; -----------------
;;
;; To print your buffer, type
;;
;;        M-x ps-print-buffer
;;
;; or substitute one of the other seven ps-print- commands.  The
;; command will generate the PostScript image and print or spool it as
;; specified.  By giving the command a prefix argument
;;
;;        C-u M-x ps-print-buffer
;;
;; it will save the PostScript image to a file instead of sending it
;; to the printer; you will be prompted for the name of the file to
;; save the image to.  The prefix argument is ignored by the commands
;; that spool their images, but you may save the spooled images to a
;; file by giving a prefix argument to `ps-despool':
;;
;;        C-u M-x ps-despool
;;
;; When invoked this way, `ps-despool' will prompt you for the name of
;; the file to save to.
;;
;; Any of the `ps-print-' commands can be bound to keys; I recommend
;; binding `ps-spool-buffer-with-faces', `ps-spool-region-with-faces',
;; and `ps-despool'.  Here are the bindings I use on my Sun 4 keyboard:
;;
;;   (global-set-key 'f22 'ps-spool-buffer-with-faces) ;f22 is prsc
;;   (global-set-key '(shift f22) 'ps-spool-region-with-faces)
;;   (global-set-key '(control f22) 'ps-despool)
;;
;;
;; The Printer Interface
;; ---------------------
;;
;; The variables `ps-lpr-command' and `ps-lpr-switches' determine what
;; command is used to send the PostScript images to the printer, and
;; what arguments to give the command.  These are analogous to
;; `lpr-command' and `lpr-switches'.
;;
;; Make sure that they contain appropriate values for your system;
;; see the usage notes below and the documentation of these variables.
;;
;; The variable `ps-printer-name' determines the name of a local printer for
;; printing PostScript files.
;;
;; The variable `ps-printer-name-option' determines the option used by some
;; utilities to indicate the printer name, it's used only when
;; `ps-printer-name' is a non-empty string.  If you're using lpr utility to
;; print, for example, `ps-printer-name-option' should be set to "-P".
;;
;; NOTE: `ps-lpr-command' and `ps-lpr-switches' take their initial values
;;       from the variables `lpr-command' and `lpr-switches'.  If you have
;;       `lpr-command' set to invoke a pretty-printer such as `enscript',
;;       then ps-print won't work properly.  `ps-lpr-command' must name
;;       a program that does not format the files it prints.
;;       `ps-printer-name' takes its initial value from the variable
;;       `printer-name'.  `ps-printer-name-option' tries to guess which system
;;       Emacs is running and takes its initial value in accordance with this
;;       guess.
;;
;; The variable `ps-print-region-function' specifies a function to print the
;; region on a PostScript printer.
;; See definition of `call-process-region' for calling conventions.  The fourth
;; and the sixth arguments are both nil.
;;
;; The variable `ps-manual-feed' indicates if the printer will manually feed
;; paper.  If it's nil, automatic feeding takes place.  If it's non-nil, manual
;; feeding takes place.  The default is nil (automatic feeding).
;;
;; If you're using Emacs for Windows 95/98/NT or MS-DOS, don't forget to
;; customize the following variables: `ps-printer-name',
;; `ps-printer-name-option', `ps-lpr-command', `ps-lpr-switches' and
;; `ps-spool-config'.  See these variables documentation in the code or by
;; typing, for example, C-h v ps-printer-name RET.
;;
;;
;; The Page Layout
;; ---------------
;;
;; All dimensions are floats in PostScript points.
;; 1 inch  ==       2.54  cm    ==     72       points
;; 1 cm    ==  (/ 1 2.54) inch  ==  (/ 72 2.54) points
;;
;; The variable `ps-paper-type' determines the size of paper ps-print formats
;; for; it should contain one of the symbols: `a4' `a3' `letter' `legal'
;; `letter-small' `tabloid' `ledger' `statement' `executive' `a4small' `b4'
;; `b5'.
;;
;; If variable `ps-warn-paper-type' is nil, it's *not* given an error if
;; PostScript printer doesn't have a paper with the size indicated by
;; `ps-paper-type', instead it uses the default paper size.  If variable
;; `ps-warn-paper-type' is non-nil, it's given an error if PostScript printer
;; doesn't have a paper with the size indicated by `ps-paper-type'.  It's used
;; when `ps-spool-config' is set to `setpagedevice' (see section Duplex
;; Printers).  The default value is non-nil (it gives an error).
;;
;; The variable `ps-landscape-mode' determines the orientation of the printing
;; on the page: nil means `portrait' mode, non-nil means `landscape' mode.
;; There is no oblique mode yet, though this is easy to do in ps.
;;
;; In landscape mode, the text is NOT scaled: you may print 70 lines in portrait
;; mode and only 50 lines in landscape mode.  The margins represent margins in
;; the printed paper: the top margin is the margin between the top of the page
;; and the printed header, whatever the orientation is.
;;
;; The variable `ps-number-of-columns' determines the number of columns both in
;; landscape and portrait mode.
;; You can use:
;; - (the standard) one column portrait mode.
;; - (my favorite) two columns landscape mode (which spares trees).
;; but also:
;; - one column landscape mode for files with very long lines.
;; - multi-column portrait or landscape mode.
;;
;; The variable `ps-print-upside-down' determines other orientation for printing
;; page: nil means `normal' printing, non-nil means `upside-down' printing.  The
;; default value is nil (`normal' printing).
;;
;; The `upside-down' orientation can be used in portrait or landscape mode.
;;
;; The variable `ps-selected-pages' specifies which pages to print.  If it's
;; nil, all pages are printed.  If it's a list, the list element may be an
;; integer or a cons cell (FROM . TO) designating FROM page to TO page; any
;; invalid element is ignored, that is, an integer lesser than one or if FROM
;; is greater than TO.  Otherwise, it's treated as nil.  The default value is
;; nil (print all pages).  After ps-print processing `ps-selected-pages' is set
;; to nil.  But the latest `ps-selected-pages' is saved in
;; `ps-last-selected-pages' (see it for documentation).  So you can restore the
;; latest selected pages by using `ps-last-selected-pages' or by calling
;; `ps-restore-selected-pages' command (see it for documentation).
;;
;; The variable `ps-even-or-odd-pages' specifies if it prints even/odd pages.
;;
;; Valid values are:
;;
;; nil          print all pages.
;;
;; even-page    print only even pages.
;;
;; odd-page     print only odd pages.
;;
;; even-sheet   print only even sheets.
;;
;; odd-sheet    print only odd sheets.
;;
;; Any other value is treated as nil.  The default value is nil.
;;
;; See `ps-even-or-odd-pages' for more detailed documentation.
;;
;;
;; Horizontal layout
;; -----------------
;;
;; The horizontal layout is determined by the variables
;; `ps-left-margin' `ps-inter-column' `ps-right-margin'
;; as follows:
;;
;;  ------------------------------------------
;;  |    |      |    |      |    |      |    |
;;  | lm | text | ic | text | ic | text | rm |
;;  |    |      |    |      |    |      |    |
;;  ------------------------------------------
;;
;; If `ps-number-of-columns' is 1, `ps-inter-column' is not relevant.
;; Usually, lm = rm > 0 and ic = lm
;; If (ic < 0), the text of adjacent columns can overlap.
;;
;;
;; Vertical layout
;; ---------------
;;
;; The vertical layout is determined by the variables
;; `ps-bottom-margin' `ps-top-margin' `ps-header-offset'
;; as follows:
;;
;; |--------|        |--------|
;; | tm     |        | tm     |
;; |--------|        |--------|
;; | header |        |        |
;; |--------|        |        |
;; | ho     |        |        |
;; |--------|   or   | text   |
;; |        |        |        |
;; | text   |        |        |
;; |        |        |        |
;; |--------|        |--------|
;; | bm     |        | bm     |
;; |--------|        |--------|
;;
;; If `ps-print-header' is nil, `ps-header-offset' is not relevant.
;; The margins represent margins in the printed paper:
;; the top margin is the margin between the top of the page
;; and the printed header, whatever the orientation is.
;;
;;
;; Headers
;; -------
;;
;; ps-print can print headers at the top of each column or at the top
;; of each page; the default headers contain the following four items:
;; on the left, the name of the buffer and, if the buffer is visiting
;; a file, the file's directory; on the right, the page number and
;; date of printing.  The default headers look something like this:
;;
;;     ps-print.el                                         1/21
;;     /home/jct/emacs-lisp/ps/new                     94/12/31
;;
;; When printing on duplex printers, left and right are reversed so
;; that the page numbers are toward the outside (cf. `ps-spool-duplex').
;;
;; Headers are configurable:
;; To turn them off completely, set `ps-print-header' to nil.
;; To turn off the header's gaudy framing box,
;; set `ps-print-header-frame' to nil.
;;
;; To print only one header at the top of each page,
;; set `ps-print-only-one-header' to t.
;;
;; To switch headers, set `ps-switch-header' to:
;;
;;    nil       Never switch headers.
;;
;;    t         Always switch headers.
;;
;;    duplex    Switch headers only when duplexing is on, that is, when
;;              `ps-spool-duplex' is non-nil (see Duplex Printers).
;;
;; Any other value is treated as t.  The default value is `duplex'.
;;
;; The font family and size of text in the header are determined
;; by the variables `ps-header-font-family', `ps-header-font-size' and
;; `ps-header-title-font-size' (see below).
;;
;; The variable `ps-header-line-pad' determines the portion of a header
;; title line height to insert between the header frame and the text
;; it contains, both in the vertical and horizontal directions:
;; .5 means half a line.
;;
;; Page numbers are printed in `n/m' format, indicating page n of m pages;
;; to omit the total page count and just print the page number,
;; set `ps-show-n-of-n' to nil.
;;
;; The amount of information in the header can be changed by changing
;; the number of lines.  To show less, set `ps-header-lines' to 1, and
;; the header will show only the buffer name and page number.  To show
;; more, set `ps-header-lines' to 3, and the header will show the time of
;; printing below the date.
;;
;; To change the content of the headers, change the variables
;; `ps-left-header' and `ps-right-header'.
;; These variables are lists, specifying top-to-bottom the text
;; to display on the left or right side of the header.
;; Each element of the list should be a string or a symbol.
;; Strings are inserted directly into the PostScript arrays,
;; and should contain the PostScript string delimiters '(' and ')'.
;;
;; Symbols in the header format lists can either represent functions
;; or variables.  Functions are called, and should return a string to
;; show in the header.  Variables should contain strings to display in
;; the header.  In either case, function or variable, the PostScript
;; string delimiters are added by ps-print, and should not be part of
;; the returned value.
;;
;; Here's an example: say we want the left header to display the text
;;
;;     Moe
;;     Larry
;;     Curly
;;
;; where we have a function to return "Moe"
;;
;;     (defun moe-func ()
;;       "Moe")
;;
;; a variable specifying "Larry"
;;
;;     (setq larry-var "Larry")
;;
;; and a literal for "Curly".  Here's how `ps-left-header' should be
;; set:
;;
;;     (setq ps-left-header (list 'moe-func 'larry-var "(Curly)"))
;;
;; Note that Curly has the PostScript string delimiters inside his
;; quotes -- those aren't misplaced lisp delimiters!
;;
;; Without them, PostScript would attempt to call the undefined
;; function Curly, which would result in a PostScript error.
;;
;; Since most printers don't report PostScript errors except by
;; aborting the print job, this kind of error can be hard to track down.
;;
;; Consider yourself warned!
;;
;;
;; PostScript Prologue Header
;; --------------------------
;;
;; It is possible to add PostScript prologue header comments besides that
;; ps-print generates by setting the variable `ps-print-prologue-header'.
;;
;; `ps-print-prologue-header' may be a string or a symbol function which returns
;; a string.  Note that this string is inserted on PostScript prologue header
;; section which is used to define some document characteristic through
;; PostScript special comments, like "%%Requirements: jog\n".
;;
;; By default `ps-print-prologue-header' is nil.
;;
;; ps-print always inserts the %%Requirements: comment, so if you need to insert
;; more requirements put them first in `ps-print-prologue-header' using the
;; "%%+" comment.  For example, if you need to set numcopies to 3 and jog on
;; requirements and set %%LanguageLevel: to 2, do:
;;
;; (setq ps-print-prologue-header
;;       "%%+ numcopies(3) jog\n%%LanguageLevel: 2\n")
;;
;; The duplex requirement is inserted by ps-print (see section Duplex Printers).
;;
;; Do not forget to terminate the string with "\n".
;;
;; For more information about PostScript document comments, see:
;;    PostScript Language Reference Manual (2nd edition)
;;    Adobe Systems Incorporated
;;    Appendix G: Document Structuring Conventions -- Version 3.0
;;
;; It is also possible to add an user defined PostScript prologue code before
;; all generated prologue code by setting the variable
;; `ps-user-defined-prologue'.
;;
;; `ps-user-defined-prologue' may be a string or a symbol function which returns
;; a string.  Note that this string is inserted after `ps-adobe-tag' and
;; PostScript prologue comments, and before ps-print PostScript prologue code
;; section.  That is, this string is inserted after error handler initialization
;; and before ps-print settings.
;;
;; By default `ps-user-defined-prologue' is nil.
;;
;; It's strongly recommended only insert PostScript code and/or comments
;; specific for your printing system particularities.  For example, some special
;; initialization that only your printing system needs.
;;
;; Do not insert code for duplex printing, n-up printing or error handler,
;; ps-print handles this in a suitable way.
;;
;; For more information about PostScript, see:
;;    PostScript Language Reference Manual (2nd edition)
;;    Adobe Systems Incorporated
;;
;; As an example for `ps-user-defined-prologue' setting:
;;
;;   ;; Setting for HP PostScript printer
;;   (setq ps-user-defined-prologue
;;         (concat "<</DeferredMediaSelection true /PageSize [612 792] "
;;                 "/MediaPosition 2 /MediaType (Plain)>> setpagedevice"))
;;
;;
;; PostScript Error Handler
;; ------------------------
;;
;; ps-print instruments generated PostScript code with an error handler.
;;
;; The variable `ps-error-handler-message' specifies where the error handler
;; message should be sent.
;;
;; Valid values are:
;;
;; none                 catch the error and *DON'T* send any message.
;;
;; paper                catch the error and print on paper the error message.
;;                      This is the default value.
;;
;; system               catch the error and send back the error message to
;;                      printing system.  This is useful only if printing system
;;                      send back an email reporting the error, or if there is
;;                      some other alternative way to report back the error from
;;                      the system to you.
;;
;; paper-and-system     catch the error, print on paper the error message and
;;                      send back the error message to printing system.
;;
;; Any other value is treated as `paper'.
;;
;;
;; Duplex Printers
;; ---------------
;;
;; If you have a duplex-capable printer (one that prints both sides of the
;; paper), set `ps-spool-duplex' to t.
;; ps-print will insert blank pages to make sure each buffer starts on the
;; correct side of the paper.
;;
;; The variable `ps-spool-config' specifies who is the responsable for setting
;; duplex and page size switches.  Valid values are:
;;
;; lpr-switches    duplex and page size are configured by `ps-lpr-switches'.
;;                 Don't forget to set `ps-lpr-switches' to select duplex
;;                 printing for your printer.
;;
;; setpagedevice   duplex and page size are configured by ps-print using the
;;                 setpagedevice PostScript operator.
;;
;; nil             duplex and page size are configured by ps-print *not* using
;;                 the setpagedevice PostScript operator.
;;
;; Any other value is treated as nil.
;;
;; The default value is `lpr-switches'.
;;
;; WARNING: The setpagedevice PostScript operator affects ghostview utility when
;;          viewing file generated using landscape.  Also on some printers,
;;          setpagedevice affects zebra stripes; on other printers,
;;          setpagedevice affects the left margin.
;;          Besides all that, if your printer does not have the paper size
;;          specified by setpagedevice, your printing will be aborted.
;;          So, if you need to use setpagedevice, set `ps-spool-config' to
;;          `setpagedevice', generate a test file and send it to your printer;
;;          if the printed file isn't ok, set `ps-spool-config' to nil.
;;
;; The variable `ps-spool-tumble' specifies how the page images on opposite
;; sides of a sheet are oriented with respect to each other.  If
;; `ps-spool-tumble' is nil, produces output suitable for binding on the left or
;; right.  If `ps-spool-tumble' is non-nil, produces output suitable for binding
;; at the top or bottom.  It has effect only when `ps-spool-duplex' is non-nil.
;; The default value is nil.
;;
;; Some printer system prints a header page and forces the first page be printed
;; on header page back, when using duplex.  If your printer system has this
;; behavior, set variable `ps-banner-page-when-duplexing' to t.
;;
;; When `ps-banner-page-when-duplexing' is non-nil means the very first page is
;; skipped.  It's like the very first character of buffer (or region) is ^L
;; (\014).
;;
;; The default for `ps-banner-page-when-duplexing' is nil (*don't* skip the very
;; first page).
;;
;;
;; N-up Printing
;; -------------
;;
;; The variable `ps-n-up-printing' specifies the number of pages per sheet of
;; paper.  The value specified must be between 1 and 100.  The default is 1.
;;
;; NOTE: some PostScript printer may crash printing if `ps-n-up-printing' is set
;;       to a high value (for example, 23).  If this happens, set a lower value.
;;
;; The variable `ps-n-up-margin' specifies the margin in points between the
;; sheet border and the n-up printing.  The default is 1 cm (or 0.3937 inches,
;; or 28.35 points).
;;
;; If variable `ps-n-up-border-p' is non-nil a border is drawn around each page.
;; The default is t.
;;
;; The variable `ps-n-up-filling' specifies how page matrix is filled on each
;; sheet of paper.  Following are the valid values for `ps-n-up-filling' with a
;; filling example using a 3x4 page matrix:
;;
;;  left-top   1  2  3  4         left-bottom    9  10 11 12
;;             5  6  7  8                        5  6  7  8
;;             9  10 11 12                       1  2  3  4
;;
;;  right-top  4  3  2  1         right-bottom   12 11 10 9
;;             8  7  6  5                        8  7  6  5
;;             12 11 10 9                        4  3  2  1
;;
;;  top-left   1  4  7  10        bottom-left    3  6  9  12
;;             2  5  8  11                       2  5  8  11
;;             3  6  9  12                       1  4  7  10
;;
;;  top-right  10 7  4  1         bottom-right   12 9  6  3
;;             11 8  5  2                        11 8  5  2
;;             12 9  6  3                        10 7  4  1
;;
;; Any other value is treated as left-top.
;;
;; The default value is left-top.
;;
;;
;; Control And 8-bit Characters
;; ----------------------------
;;
;; The variable `ps-print-control-characters' specifies whether you want to see
;; a printable form for control and 8-bit characters, that is, instead of
;; sending, for example, a ^D (\004) to printer, it is sent the string "^D".
;;
;; Valid values for `ps-print-control-characters' are:
;;
;;  8-bit           This is the value to use when you want an ASCII encoding of
;;                  any control or non-ASCII character. Control characters are
;;                  encoded as "^D", and non-ASCII characters have an
;;                  octal encoding.
;;
;;  control-8-bit   This is the value to use when you want an ASCII encoding of
;;                  any control character, whether it is 7 or 8-bit.
;;                  European 8-bits accented characters are printed according
;;                  the current font.
;;
;;  control         Only ASCII control characters have an ASCII encoding.
;;                  European 8-bits accented characters are printed according
;;                  the current font.
;;
;;  nil             No ASCII encoding. Any character is printed according the
;;                  current font.
;;
;; Any other value is treated as nil.
;;
;; The default is `control-8-bit'.
;;
;; Characters TAB, NEWLINE and FORMFEED are always treated by ps-print engine.
;;
;;
;; Printing Multi-byte Buffer
;; --------------------------
;;
;; See ps-mule.el for documentation.
;;
;;
;; Line Number
;; -----------
;;
;; The variable `ps-line-number' specifies whether to number each line;
;; non-nil means do so.  The default is nil (don't number each line).
;;
;; The variable `ps-line-number-step' specifies the interval that line number is
;; printed.  For example, if `ps-line-number-step' is set to 2, the printing
;; will look like:
;;
;;    1 one line
;;      one line
;;    3 one line
;;      one line
;;    5 one line
;;      one line
;;      ...
;;
;; Valid values are:
;;
;; integer      an integer that specifies the interval that line number is
;;              printed.  If it's lesser than or equal to zero, it's used the
;;              value 1.
;;
;; `zebra'      specifies that only the line number of the first line in a zebra
;;              stripe is to be printed.
;;
;; Any other value is treated as `zebra'.
;; The default value is 1, so each line number is printed.
;;
;; The variable `ps-line-number-start' specifies the starting point in the
;; interval given by `ps-line-number-step'.  For example, if
;; `ps-line-number-step' is set to 3 and `ps-line-number-start' is set to 3, the
;; printing will look like:
;;
;;      one line
;;      one line
;;    3 one line
;;      one line
;;      one line
;;    6 one line
;;      one line
;;      one line
;;    9 one line
;;      one line
;;      ...
;;
;; The values for `ps-line-number-start':
;;
;;    * If `ps-line-number-step' is an integer, must be between 1 and the value
;;      of `ps-line-number-step' inclusive.
;;
;;    * If `ps-line-number-step' is set to `zebra', must be between 1 and the
;;      value of `ps-zebra-stripe-height' inclusive.
;;
;; The default value is 1, so the line number of the first line of each interval
;; is printed.
;;
;;
;; Zebra Stripes
;; -------------
;;
;; Zebra stripes are a kind of background that appear "underneath" the text
;; and can make the text easier to read.  They look like this:
;;
;; XXXXXXXXXXXXXXXXXXXXXXXX
;; XXXXXXXXXXXXXXXXXXXXXXXX
;; XXXXXXXXXXXXXXXXXXXXXXXX
;;
;;
;;
;; XXXXXXXXXXXXXXXXXXXXXXXX
;; XXXXXXXXXXXXXXXXXXXXXXXX
;; XXXXXXXXXXXXXXXXXXXXXXXX
;;
;; The blocks of X's represent rectangles filled with a light gray color.
;; Each rectangle extends all the way across the page.
;;
;; The height, in lines, of each rectangle is controlled by
;; the variable `ps-zebra-stripe-height', which is 3 by default.
;; The distance between stripes equals the height of a stripe.
;;
;; The variable `ps-zebra-stripes' controls whether to print zebra stripes.
;; Non-nil means yes, nil means no.  The default is nil.
;;
;; The variable `ps-zebra-color' controls the zebra stripes gray scale or RGB
;; color.  It should be a float number between 0.0 (black color) and 1.0 (white
;; color), a string which is a color name, or a list of 3 numbers which
;; corresponds to the Red Green Blue color scale.
;; The default is 0.95 (or "gray95", or '(0.95 0.95 0.95)).
;;
;; The variable `ps-zebra-stripe-follow' specifies if zebra stripe should
;; continue on next page or restart on each page.  If `ps-zebra-stripe-follow'
;; is nil, zebra stripe is restarted on each page.  If `ps-zebra-stripe-follow'
;; is non-nil, zebra stripe continues on next page.  Visually, we have:
;;
;;              `ps-zebra-stripe-follow'        `ps-zebra-stripe-follow'
;;                 is nil                          is non-nil
;; Current Page ------------------------        ------------------------
;;              1  XXXXXXXXXXXXXXXXXXXXX        1  XXXXXXXXXXXXXXXXXXXXX
;;              2  XXXXXXXXXXXXXXXXXXXXX        2  XXXXXXXXXXXXXXXXXXXXX
;;              3  XXXXXXXXXXXXXXXXXXXXX        3  XXXXXXXXXXXXXXXXXXXXX
;;              4                               4
;;              5                               5
;;              6                               6
;;              7  XXXXXXXXXXXXXXXXXXXXX        7  XXXXXXXXXXXXXXXXXXXXX
;;              8  XXXXXXXXXXXXXXXXXXXXX        8  XXXXXXXXXXXXXXXXXXXXX
;;              ------------------------        ------------------------
;;    Next Page ------------------------        ------------------------
;;              9  XXXXXXXXXXXXXXXXXXXXX        9  XXXXXXXXXXXXXXXXXXXXX
;;              10 XXXXXXXXXXXXXXXXXXXXX        10
;;              11 XXXXXXXXXXXXXXXXXXXXX        11
;;              12                              12
;;              13                              13 XXXXXXXXXXXXXXXXXXXXX
;;              14                              14 XXXXXXXXXXXXXXXXXXXXX
;;              15 XXXXXXXXXXXXXXXXXXXXX        15 XXXXXXXXXXXXXXXXXXXXX
;;              16 XXXXXXXXXXXXXXXXXXXXX        16
;;              ------------------------        ------------------------
;;
;; See also section How Ps-Print Has A Text And/Or Image On Background.
;;
;;
;; Hooks
;; -----
;;
;; ps-print has the following hook variables:
;;
;; `ps-print-hook'
;;    It is evaluated once before any printing process.  This is the right
;;    place to initialize ps-print global data.
;;    For an example, see section Adding a New Font Family.
;;
;; `ps-print-begin-sheet-hook'
;;    It is evaluated on each beginning of sheet of paper.
;;    If `ps-n-up-printing' is equal to 1, `ps-print-begin-page-hook' is never
;;    evaluated.
;;
;; `ps-print-begin-page-hook'
;;    It is evaluated on each beginning of page, except in the beginning
;;    of page that `ps-print-begin-sheet-hook' is evaluated.
;;
;; `ps-print-begin-column-hook'
;;    It is evaluated on each beginning of column, except in the beginning
;;    of column that `ps-print-begin-page-hook' is evaluated or that
;;    `ps-print-begin-sheet-hook' is evaluated.
;;
;;
;; Font Managing
;; -------------
;;
;; ps-print now knows rather precisely some fonts: the variable
;; `ps-font-info-database' contains information for a list of font families
;; (currently mainly `Courier' `Helvetica' `Times' `Palatino' `Helvetica-Narrow'
;; `NewCenturySchlbk').  Each font family contains the font names for standard,
;; bold, italic and bold-italic characters, a reference size (usually 10) and
;; the corresponding line height, width of a space and average character width.
;;
;; The variable `ps-font-family' determines which font family is to be used for
;; ordinary text.  If its value does not correspond to a known font family, an
;; error message is printed into the `*Messages*' buffer, which lists the
;; currently available font families.
;;
;; The variable `ps-font-size' determines the size (in points) of the font for
;; ordinary text, when generating PostScript.  Its value is a float or a cons of
;; floats which has the following form:
;;
;;    (LANDSCAPE-SIZE . PORTRAIT-SIZE)
;;
;; Similarly, the variable `ps-header-font-family' determines which font family
;; is to be used for text in the header.
;;
;; The variable `ps-header-font-size' determines the font size, in points, for
;; text in the header (similar to `ps-font-size').
;;
;; The variable `ps-header-title-font-size' determines the font size, in points,
;; for the top line of text in the header (similar to `ps-font-size').
;;
;;
;; Adding a New Font Family
;; ------------------------
;;
;; To use a new font family, you MUST first teach ps-print
;; this font, i.e., add its information to `ps-font-info-database',
;; otherwise ps-print cannot correctly place line and page breaks.
;;
;; For example, assuming `Helvetica' is unknown,
;; you first need to do the following ONLY ONCE:
;;
;; - create a new buffer
;; - generate the PostScript image to a file (C-u M-x ps-print-buffer)
;; - open this file and find the line:
;;      `% 3 cm 20 cm moveto  10/Courier ReportFontInfo  showpage'
;; - delete the leading `%' (which is the PostScript comment character)
;; - replace in this line `Courier' by the new font (say `Helvetica')
;;   to get the line:
;;      `3 cm 20 cm moveto  10/Helvetica ReportFontInfo  showpage'
;; - send this file to the printer (or to ghostscript).
;;   You should read the following on the output page:
;;
;;     For Helvetica 10 point, the line height is 11.56, the space width is 2.78
;;     and a crude estimate of average character width is 5.09243
;;
;; - Add these values to the `ps-font-info-database':
;;   (setq ps-font-info-database
;;         (append
;;          '((Helvetica                        ; the family key
;;             (fonts (normal      . "Helvetica")
;;                    (bold        . "Helvetica-Bold")
;;                    (italic      . "Helvetica-Oblique")
;;                    (bold-italic . "Helvetica-BoldOblique"))
;;             (size . 10.0)
;;             (line-height . 11.56)
;;             (space-width . 2.78)
;;             (avg-char-width . 5.09243)))
;;          ps-font-info-database))
;; - Now you can use this font family with any size:
;;      (setq ps-font-family 'Helvetica)
;; - if you want to use this family in another emacs session, you must
;;   put into your `~/.emacs':
;;      (require 'ps-print)
;;      (setq ps-font-info-database (append ...)))
;;   if you don't want to load ps-print, you have to copy the whole value:
;;      (setq ps-font-info-database '(<your stuff> <the standard stuff>))
;;   or, use `ps-print-hook' (see section Hooks):
;;      (add-hook 'ps-print-hook
;;                '(lambda ()
;;                   (or (assq 'Helvetica ps-font-info-database)
;;                       (setq ps-font-info-database (append ...)))))
;;
;; You can create new `mixed' font families like:
;;      (my-mixed-family
;;       (fonts (normal               . "Courier-Bold")
;;              (bold                 . "Helvetica")
;;              (italic               . "Zapf-Chancery-MediumItalic")
;;              (bold-italic          . "NewCenturySchlbk-BoldItalic")
;;              (w3-table-hack-x-face . "LineDrawNormal"))
;;       (size . 10.0)
;;       (line-height . 10.55)
;;       (space-width . 6.0)
;;       (avg-char-width . 6.0))
;;
;; Now you can use your new font family with any size:
;;      (setq ps-font-family 'my-mixed-family)
;;
;; Note that on above example the `w3-table-hack-x-face' entry refers to
;; a face symbol, so when printing this face it'll be used the font
;; `LineDrawNormal'.  If the face  `w3-table-hack-x-face'  is remapped to
;; use bold and/or italic attribute, the corresponding entry (bold, italic
;; or bold-italic) will be used instead of `w3-table-hack-x-face' entry.
;;
;; Note also that the font family entry order is irrelevant, so the above
;; example could also be written:
;;      (my-mixed-family
;;       (size . 10.0)
;;       (fonts (w3-table-hack-x-face . "LineDrawNormal")
;;              (bold                 . "Helvetica")
;;              (bold-italic          . "NewCenturySchlbk-BoldItalic")
;;              (italic               . "Zapf-Chancery-MediumItalic")
;;              (normal               . "Courier-Bold"))
;;       (avg-char-width . 6.0)
;;       (space-width . 6.0)
;;       (line-height . 10.55))
;;
;; Despite the note above, it is recommended that some convention about
;; entry order be used.
;;
;; You can get information on all the fonts resident in YOUR printer
;; by uncommenting the line:
;;      % 3 cm 20 cm moveto  ReportAllFontInfo           showpage
;;
;; The PostScript file should be sent to YOUR PostScript printer.
;; If you send it to ghostscript or to another PostScript printer,
;; you may get slightly different results.
;; Anyway, as ghostscript fonts are autoload, you won't get much font info.
;;
;; Note also that ps-print DOESN'T download any font to your printer, instead
;; it uses the fonts resident in your printer.
;;
;;
;; How Ps-Print Deals With Faces
;; -----------------------------
;;
;; The ps-print-*-with-faces commands attempt to determine which faces
;; should be printed in bold or italic, but their guesses aren't
;; always right.  For example, you might want to map colors into faces
;; so that blue faces print in bold, and red faces in italic.
;;
;; It is possible to force ps-print to consider specific faces bold,
;; italic or underline, no matter what font they are displayed in, by setting
;; the variables `ps-bold-faces', `ps-italic-faces' and `ps-underlined-faces'.
;; These variables contain lists of faces that ps-print should consider bold,
;; italic or underline; to set them, put code like the following into your
;; .emacs file:
;;
;;      (setq ps-bold-faces '(my-blue-face))
;;      (setq ps-italic-faces '(my-red-face))
;;      (setq ps-underlined-faces '(my-green-face))
;;
;; Faces like bold-italic that are both bold and italic should go in
;; *both* lists.
;;
;; ps-print keeps internal lists of which fonts are bold and which are
;; italic; these lists are built the first time you invoke ps-print.
;; For the sake of efficiency, the lists are built only once; the same
;; lists are referred in later invocations of ps-print.
;;
;; Because these lists are built only once, it's possible for them to
;; get out of sync, if a face changes, or if new faces are added.  To
;; get the lists back in sync, you can set the variable
;; `ps-build-face-reference' to t, and the lists will be rebuilt the
;; next time ps-print is invoked.  If you need that the lists always be
;; rebuilt when ps-print is invoked, set the variable
;; `ps-always-build-face-reference' to t.
;;
;; If you need to print without worrying about face background color, set the
;; variable `ps-use-face-background' which specifies if face background should
;; be used.  Valid values are:
;;
;;    t         always use face background color.
;;    nil       never use face background color.
;;    (face...) list of faces whose background color will be used.
;;
;; Any other value will be treated as t.
;; The default value is t.
;;
;;
;; How Ps-Print Deals With Color
;; -----------------------------
;;
;; ps-print detects faces with foreground and background colors
;; defined and embeds color information in the PostScript image.
;; The default foreground and background colors are defined by the
;; variables `ps-default-fg' and `ps-default-bg'.
;; On black-and-white printers, colors are displayed in gray scale.
;; To turn off color output, set `ps-print-color-p' to nil.
;;
;;
;; How Ps-Print Maps Faces
;; -----------------------
;;
;; As ps-print uses PostScript to print buffers, it is possible to have
;; other attributes associated with faces. So the new attributes used
;; by ps-print are:
;;
;;   strikeout - like underline, but the line is in middle of text.
;;   overline  - like underline, but the line is over the text.
;;   shadow    - text will have a shadow.
;;   box       - text will be surrounded by a box.
;;   outline   - print characters as hollow outlines.
;;
;; See the documentation for `ps-extend-face'.
;;
;; Let's, for example, remap `font-lock-keyword-face' to another foreground
;; color and bold attribute:
;;
;;    (ps-extend-face '(font-lock-keyword-face "RoyalBlue" nil bold) 'MERGE)
;;
;; If you want to use a new face, define it first with `defface',
;; and then call `ps-extend-face' to specify how to print it.
;;
;;
;; How Ps-Print Has A Text And/Or Image On Background
;; --------------------------------------------------
;;
;; ps-print can print texts and/or EPS PostScript images on background; it is
;; possible to define the following text attributes: font name, font size,
;; initial position, angle, gray scale and pages to print.
;;
;; It has the following EPS PostScript images attributes: file name containing
;; the image, initial position, X and Y scales, angle and pages to print.
;;
;; See documentation for `ps-print-background-text' and
;; `ps-print-background-image'.
;;
;; For example, if we wish to print text "preliminary" on all pages and text
;; "special" on page 5 and from page 11 to page 17, we could specify:
;;
;; (setq ps-print-background-text
;;       '(("preliminary")
;;         ("special"
;;          "LeftMargin" "BottomMargin PrintHeight add" ; X and Y position
;;                                      ; (upper left corner)
;;          nil nil nil
;;          "PrintHeight neg PrintPageWidth atan" ; angle
;;          5 (11 . 17))                ; page list
;;         ))
;;
;; Similarly, we could print image "~/images/EPS-image1.ps" on all pages and
;; image "~/images/EPS-image2.ps" on page 5 and from page 11 to page 17, we
;; specify:
;;
;; (setq ps-print-background-image
;;       '(("~/images/EPS-image1.ps"
;;          "LeftMargin" "BottomMargin") ; X and Y position (lower left corner)
;;         ("~/images/EPS-image2.ps"
;;          "LeftMargin" "BottomMargin PrintHeight 2 div add" ; X and Y position
;;                                      ; (upper left corner)
;;          nil nil nil
;;          5 (11 . 17))                ; page list
;;         ))
;;
;; If it is not possible to read (or does not exist) an image file, that file
;; is ignored.
;;
;; The printing order is:
;;
;;    1. Print background color
;;    2. Print zebra stripes
;;    3. Print background texts that it should be on all pages
;;    4. Print background images that it should be on all pages
;;    5. Print background texts only for current page (if any)
;;    6. Print background images only for current page (if any)
;;    7. Print header
;;    8. Print buffer text (with faces, if specified) and line number
;;
;;
;; Utilities
;; ---------
;;
;; Some tools are provided to help you customize your font setup.
;;
;; `ps-setup' returns (some part of) the current setup.
;;
;; To avoid wrapping too many lines, you may want to adjust the
;; left and right margins and the font size.  On UN*X systems, do:
;; pr -t file | awk '{printf "%3d %s\n", length($0), $0}' | sort -r | head
;; to determine the longest lines of your file.
;; Then, the command `ps-line-lengths' will give you the correspondence
;; between a line length (number of characters) and the maximum font
;; size which doesn't wrap such a line with the current ps-print setup.
;;
;; The commands `ps-nb-pages-buffer' and `ps-nb-pages-region' display
;; the correspondence between a number of pages and the maximum font
;; size which allow the number of lines of the current buffer or of
;; its current region to fit in this number of pages.
;;
;; NOTE: line folding is not taken into account in this process and could
;;       change the results.
;;
;; The command `ps-print-customize' activates a customization buffer for
;; ps-print options.
;;
;;
;; New since version 1.5
;; ---------------------
;;
;; Color output capability.
;; Automatic detection of font attributes (bold, italic).
;; Configurable headers with page numbers.
;; Slightly faster.
;; Support for different paper sizes.
;; Better conformance to PostScript Document Structure Conventions.
;;
;;
;; New since version 2.8
;; ---------------------
;;
;; [vinicius] Vinicius Jose Latorre <vinicius@cpqd.com.br>
;;
;;    20000821
;;       `ps-even-or-odd-pages'
;;
;;    20000617
;;       `ps-manual-feed', `ps-warn-paper-type', `ps-print-upside-down',
;;       `ps-selected-pages', `ps-last-selected-pages',
;;       `ps-restore-selected-pages', `ps-switch-header',
;;       `ps-line-number-step', `ps-line-number-start',
;;       `ps-zebra-stripe-follow' and `ps-use-face-background'.
;;
;;    20000310
;;       PostScript error handler.
;;       `ps-user-defined-prologue' and `ps-error-handler-message'.
;;
;;    19991211
;;       `ps-print-customize'.
;;
;;    19990703
;;       Better customization.
;;       `ps-banner-page-when-duplexing' and `ps-zebra-color'.
;;
;;    19990513
;;       N-up printing.
;;       Hook: `ps-print-begin-sheet-hook'.
;;
;; [keinichi] 19990509 Kein'ichi Handa <handa@etl.go.jp>
;;
;; `ps-print-region-function'
;;
;; [vinicius] Vinicius Jose Latorre <vinicius@cpqd.com.br>
;;
;;    19990301
;;       PostScript tumble and setpagedevice.
;;
;;    19980922
;;       PostScript prologue header comment insertion.
;;       Skip invisible text better.
;;
;; [keinichi] 19980819 Kein'ichi Handa <handa@etl.go.jp>
;;
;; Multi-byte buffer handling.
;;
;; [vinicius] Vinicius Jose Latorre <vinicius@cpqd.com.br>
;;
;;    19980306
;;       Skip invisible text.
;;
;;    19971130
;;       Hooks: `ps-print-hook', `ps-print-begin-page-hook' and
;;       `ps-print-begin-column-hook'.
;;       Put one header per page over the columns.
;;       Better database font management.
;;       Better control characters handling.
;;
;;    19971121
;;       Dynamic evaluation at print time of `ps-lpr-switches'.
;;       Handle control characters.
;;       Face remapping.
;;       New face attributes.
;;       Line number.
;;       Zebra stripes.
;;       Text and/or image on background.
;;
;; [jack] 19960517 Jacques Duthen <duthen@cegelec-red.fr>
;;
;; Font family and float size for text and header.
;; Landscape mode.
;; Multiple columns.
;; Tools for page setup.
;;
;;
;; Known bugs and limitations of ps-print
;; --------------------------------------
;;
;; Although color printing will work in XEmacs 19.12, it doesn't work
;; well; in particular, bold or italic fonts don't print in the right
;; background color.
;;
;; Invisible properties aren't correctly ignored in XEmacs 19.12.
;;
;; Automatic font-attribute detection doesn't work well, especially
;; with hilit19 and older versions of get-create-face.  Users having
;; problems with auto-font detection should use the lists
;; `ps-italic-faces', `ps-bold-faces' and `ps-underlined-faces' and/or
;; turn off automatic detection by setting `ps-auto-font-detect' to nil.
;;
;; Automatic font-attribute detection doesn't work with XEmacs 19.12
;; in tty mode; use the lists `ps-italic-faces', `ps-bold-faces' and
;; `ps-underlined-faces' instead.
;;
;; Still too slow; could use some hand-optimization.
;;
;; Default background color isn't working.
;;
;; Faces are always treated as opaque.
;;
;; Epoch and Emacs 19 not supported.  At all.
;;
;; Fixed-pitch fonts work better for line folding, but are not required.
;;
;; `ps-nb-pages-buffer' and `ps-nb-pages-region' don't take care
;; of folding lines.
;;
;;
;; Things to change
;; ----------------
;;
;; Avoid page break inside a paragraph.
;; Add `ps-non-bold-faces' and `ps-non-italic-faces' (should be easy).
;; Improve the memory management for big files (hard?).
;; `ps-nb-pages-buffer' and `ps-nb-pages-region' should take care
;; of folding lines.
;;
;;
;; Acknowledgements
;; ----------------
;;
;; Thanks to Gord Wait <Gord_Wait@spectrumsignal.com> for
;; `ps-user-defined-prologue' example setting for HP PostScript printer.
;;
;; Thanks to Paul Furnanz <pfurnanz@synopsys.com> for XEmacs compatibility
;; suggestion for `ps-postscript-code-directory' variable.
;;
;; Thanks to David X Callaway <dxc@xprt.net> for helping debugging PostScript
;; level 1 compatibility.
;;
;; Thanks to Colin Marquardt <colin.marquardt@usa.alcatel.com> for upside-down,
;; line number step, line number start and zebra stripe follow suggestions, and
;; for XEmacs beta-tests.
;;
;; Thanks to Klaus Berndl <klaus.berndl@sdm.de> for user defined PostScript
;; prologue code suggestion and for odd/even printing suggestion.
;;
;; Thanks to Kein'ichi Handa <handa@etl.go.jp> for multi-byte buffer handling.
;;
;; Thanks to Matthew O Persico <Matthew.Persico@lazard.com> for line number on
;; empty columns.
;;
;; Thanks to Theodore Jump <tjump@cais.com> for adjust PostScript code order on
;; last page.
;;
;; Thanks to Roland Ducournau <ducour@lirmm.fr> for
;; `ps-print-control-characters' variable documentation.
;;
;; Thanks to Marcus G Daniels <marcus@cathcart.sysc.pdx.edu> for a better
;; database font management.
;;
;; Thanks to Martin Boyer <gamin@videotron.ca> for some ideas on putting one
;; header per page over the columns and correct line numbers when printing a
;; region.
;;
;; Thanks to Steven L Baur <steve@miranova.com> for dynamic evaluation at
;; print time of `ps-lpr-switches'.
;;
;; Thanks to Kevin Rodgers <kevinr@ihs.com> for handling control characters
;; (his code was severely modified, but the main idea was kept).
;;
;; Thanks to some suggestions on:
;;  * Face color map: Marco Melgazzi <marco@techie.com>
;;  * XEmacs compatibility: William J. Henney <will@astrosmo.unam.mx>
;;  * Check `ps-paper-type': Sudhakar Frederick <sfrederi@asc.corp.mot.com>
;;
;; Thanks to Jacques Duthen <duthen@cegelec-red.fr> (Jack) for the 3.4 version
;; I started from. [vinicius]
;;
;; Thanks to Jim Thompson <?@?> for the 2.8 version I started from.
;; [jack]
;;
;; Thanks to Kevin Rodgers <kevinr@ihs.com> for adding support for
;; color and the invisible property.
;;
;; Thanks to Avishai Yacobi, avishaiy@mcil.comm.mot.com, for writing
;; the initial port to Emacs 19.  His code is no longer part of
;; ps-print, but his work is still appreciated.
;;
;; Thanks to Remi Houdaille and Michel Train, michel@metasoft.fdn.org,
;; for adding underline support.  Their code also is no longer part of
;; ps-print, but their efforts are not forgotten.
;;
;; Thanks also to all of you who mailed code to add features to
;; ps-print; although I didn't use your code, I still appreciate your
;; sharing it with me.
;;
;; Thanks to all who mailed comments, encouragement, and criticism.
;; Thanks also to all who responded to my survey; I had too many
;; responses to reply to them all, but I greatly appreciate your
;; interest.
;;
;; Jim
;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;;; Code:

(eval-and-compile
  (unless (featurep 'lisp-float-type)
    (error "`ps-print' requires floating point support"))


  ;; For Emacs 20.2 and the earlier version.

  (or (fboundp 'set-buffer-multibyte)
      (defun set-buffer-multibyte (arg)
        (setq enable-multibyte-characters arg)))

  (or (fboundp 'string-as-unibyte)
      (defun string-as-unibyte (arg) arg))

  (or (fboundp 'string-as-multibyte)
      (defun string-as-multibyte (arg) arg))

  (or (fboundp 'char-charset)
      (defun char-charset (arg) 'ascii))

  (or (fboundp 'charset-after)
      (defun charset-after (&optional arg)
        (char-charset (char-after arg))))


  ;; GNU Emacs
  (or (fboundp 'line-beginning-position)
      (defun line-beginning-position (&optional n)
        (save-excursion
          (and n (/= n 1) (forward-line (1- n)))
          (beginning-of-line)
          (point))))


  ;; to avoid compilation gripes

  ;; XEmacs
  (defalias 'ps-x-color-instance-p              'color-instance-p)
  (defalias 'ps-x-color-instance-rgb-components 'color-instance-rgb-components)
  (defalias 'ps-x-color-name                    'color-name)
  (defalias 'ps-x-color-specifier-p             'color-specifier-p)
  (defalias 'ps-x-copy-coding-system            'copy-coding-system)
  (defalias 'ps-x-device-class                  'device-class)
  (defalias 'ps-x-extent-end-position           'extent-end-position)
  (defalias 'ps-x-extent-face                   'extent-face)
  (defalias 'ps-x-extent-priority               'extent-priority)
  (defalias 'ps-x-extent-start-position         'extent-start-position)
  (defalias 'ps-x-face-font-instance            'face-font-instance)
  (defalias 'ps-x-find-coding-system            'find-coding-system)
  (defalias 'ps-x-font-instance-properties      'font-instance-properties)
  (defalias 'ps-x-make-color-instance           'make-color-instance)
  (defalias 'ps-x-map-extents                   'map-extents)

  ;; GNU Emacs
  (defalias 'ps-e-x-color-values 'x-color-values)
  (defalias 'ps-e-color-values   'color-values)
  (if (fboundp 'find-composition)
      (defalias 'ps-e-find-composition 'find-composition)
    (defalias 'ps-e-find-composition 'ignore))


  (defconst ps-windows-system
    (memq system-type '(emx win32 w32 mswindows ms-dos windows-nt)))
  (defconst ps-lp-system
    (memq system-type '(usq-unix-v dgux hpux irix))))


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; User Variables:


;;; Interface to the command system

(defgroup postscript nil
  "PostScript Group"
  :tag "PostScript"
  :group 'emacs)

(defgroup ps-print nil
  "PostScript generator for Emacs"
  :link '(emacs-library-link :tag "Source Lisp File" "ps-print.el")
  :prefix "ps-"
  :group 'wp
  :group 'postscript)

(defgroup ps-print-horizontal nil
  "Horizontal page layout"
  :prefix "ps-"
  :tag "Horizontal"
  :group 'ps-print)

(defgroup ps-print-vertical nil
  "Vertical page layout"
  :prefix "ps-"
  :tag "Vertical"
  :group 'ps-print)

(defgroup ps-print-headers nil
  "Headers layout"
  :prefix "ps-"
  :tag "Header"
  :group 'ps-print)

(defgroup ps-print-font nil
  "Fonts customization"
  :prefix "ps-"
  :tag "Font"
  :group 'ps-print)

(defgroup ps-print-color nil
  "Color customization"
  :prefix "ps-"
  :tag "Color"
  :group 'ps-print)

(defgroup ps-print-face nil
  "Faces customization"
  :prefix "ps-"
  :tag "PS Faces"
  :group 'ps-print
  :group 'faces)

(defgroup ps-print-n-up nil
  "N-up customization"
  :prefix "ps-"
  :tag "N-Up"
  :group 'ps-print)

(defgroup ps-print-zebra nil
  "Zebra customization"
  :prefix "ps-"
  :tag "Zebra"
  :group 'ps-print)

(defgroup ps-print-background nil
  "Background customization"
  :prefix "ps-"
  :tag "Background"
  :group 'ps-print)

(defgroup ps-print-printer nil
  "Printer customization"
  :prefix "ps-"
  :tag "Printer"
  :group 'ps-print)

(defgroup ps-print-page nil
  "Page customization"
  :prefix "ps-"
  :tag "Page"
  :group 'ps-print)

(defgroup ps-print-miscellany nil
  "Miscellany customization"
  :prefix "ps-"
  :tag "Miscellany"
  :group 'ps-print)


(defcustom ps-error-handler-message 'paper
  "*Specify where the error handler message should be sent.

Valid values are:

   `none'               catch the error and *DON'T* send any message.

   `paper'              catch the error and print on paper the error message.

   `system'             catch the error and send back the error message to
                        printing system.  This is useful only if printing system
                        send back an email reporting the error, or if there is
                        some other alternative way to report back the error from
                        the system to you.

   `paper-and-system'   catch the error, print on paper the error message and
                        send back the error message to printing system.

Any other value is treated as `paper'."
  :type '(choice :menu-tag "Error Handler Message"
                 :tag "Error Handler Message"
                 (const none)   (const paper)
                 (const system) (const paper-and-system))
  :group 'ps-print-miscellany)

(defcustom ps-user-defined-prologue nil
  "*User defined PostScript prologue code inserted before all prologue code.

`ps-user-defined-prologue' may be a string or a symbol function which returns a
string.  Note that this string is inserted after `ps-adobe-tag' and PostScript
prologue comments, and before ps-print PostScript prologue code section.  That
is, this string is inserted after error handler initialization and before
ps-print settings.

It's strongly recommended only insert PostScript code and/or comments specific
for your printing system particularities.  For example, some special
initialization that only your printing system needs.

Do not insert code for duplex printing, n-up printing or error handler, ps-print
handles this in a suitable way.

For more information about PostScript, see:
   PostScript Language Reference Manual (2nd edition)
   Adobe Systems Incorporated

As an example for `ps-user-defined-prologue' setting:

   ;; Setting for HP PostScript printer
   (setq ps-user-defined-prologue
         (concat \"<</DeferredMediaSelection true /PageSize [612 792] \"
                 \"/MediaPosition 2 /MediaType (Plain)>> setpagedevice\"))
"
  :type '(choice :menu-tag "User Defined Prologue"
                 :tag "User Defined Prologue"
                 (const :tag "none" nil) string symbol)
  :group 'ps-print-miscellany)

(defcustom ps-print-prologue-header nil
  "*PostScript prologue header comments besides that ps-print generates.

`ps-print-prologue-header' may be a string or a symbol function which
returns a string.  Note that this string is inserted on PostScript prologue
header section which is used to define some document characteristic through
PostScript special comments, like \"%%Requirements: jog\\n\".

ps-print always inserts the %%Requirements: comment, so if you need to insert
more requirements put them first in `ps-print-prologue-header' using the
\"%%+\" comment.  For example, if you need to set numcopies to 3 and jog on
requirements and set %%LanguageLevel: to 2, do:

(setq ps-print-prologue-header
      \"%%+ numcopies(3) jog\\n%%LanguageLevel: 2\\n\")

The duplex requirement is inserted by ps-print (see `ps-spool-duplex').

Do not forget to terminate the string with \"\\n\".

For more information about PostScript document comments, see:
   PostScript Language Reference Manual (2nd edition)
   Adobe Systems Incorporated
   Appendix G: Document Structuring Conventions -- Version 3.0"
  :type '(choice :menu-tag "Prologue Header"
                 :tag "Prologue Header"
                 (const :tag "none" nil) string symbol)
  :group 'ps-print-miscellany)

(defcustom ps-printer-name (and (boundp 'printer-name)
                                printer-name)
  "*The name of a local printer for printing PostScript files.

On Unix-like systems, a string value should be a name understood by lpr's -P
option; a value of nil means use the value of `printer-name' instead.

On MS-DOS and MS-Windows systems, a string value is taken as the name of the
printer device or port to which PostScript files are written, provided
`ps-lpr-command' is \"\".  By default it is the same as `printer-name'; 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.  \(Note that `ps-print'
package already has facilities for printing to a file, so you might as well use
them instead of changing the setting of this variable.\)  If you want to
silently discard the printed output, set this to \"NUL\".

Set to t, if the utility given by `ps-lpr-command' needs an empty printer name.

Any other value is treated as t, that is, an empty printer name.

See also `ps-printer-name-option' for documentation."
  :type '(choice :menu-tag "Printer Name"
                 :tag "Printer Name"
                 (const :tag "Same as printer-name" nil)
                 (const :tag "No Printer Name" t)
                 (file :tag "Print to file")
                 (string :tag "Pipe to ps-lpr-command"))
  :group 'ps-print-printer)

(defcustom ps-printer-name-option
  (cond (ps-windows-system
         "/D:")
        (ps-lp-system
         "-d")
        (t
         "-P" ))
  "*Option for `ps-printer-name' variable (see it).

On Unix-like systems, if it's been used lpr utility, it should be the string
\"-P\"; if it's been used lp utility, it should be the string \"-d\".

On MS-DOS and MS-Windows systems, if it's been used print utility, it should be
the string \"/D:\".

For any other printing utility, see the proper manual or documentation.

Set to \"\" or nil, if the utility given by `ps-lpr-command' needs an empty
option printer name option.

Any other value is treated as nil, that is, an empty printer name option.

This variable is used only when `ps-printer-name' is a non-empty string."
  :type '(choice :menu-tag "Printer Name Option"
                 :tag "Printer Name Option"
                 (const :tag "None" nil)
                 (string :tag "Option"))
  :group 'ps-print-printer)

(defcustom ps-lpr-command lpr-command
  "*Name of program for printing a PostScript 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 `ps-printer-name'.  The
programs `print' and `nprint' (the standard print programs on Windows NT and
Novell Netware respectively) are handled specially, using `ps-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 'ps-print-printer)

(defcustom ps-lpr-switches lpr-switches
  "*A list of extra switches to pass to `ps-lpr-command'."
  :type '(repeat :tag "PostScript lpr Switches"
                 (choice string symbol (repeat sexp)))
  :group 'ps-print-printer)

(defcustom ps-print-region-function nil
  "*Specify a function to print the region on a PostScript printer.
See definition of `call-process-region' for calling conventions.  The fourth and
the sixth arguments are both nil."
  :type 'function
  :group 'ps-print-printer)

(defcustom ps-manual-feed nil
  "*Non-nil means the printer will manually feed paper.

If it's nil, automatic feeding takes place."
  :type 'boolean
  :group 'ps-print-printer)

;;; Page layout

;; All page dimensions are in PostScript points.
;; 1 inch  ==       2.54  cm    ==     72       points
;; 1 cm    ==  (/ 1 2.54) inch  ==  (/ 72 2.54) points

;; Letter      8.5   inch x 11.0   inch
;; Legal       8.5   inch x 14.0   inch
;; A4          8.26  inch x 11.69  inch = 21.0 cm x 29.7 cm

;; LetterSmall 7.68  inch x 10.16  inch
;; Tabloid    11.0   inch x 17.0   inch
;; Ledger     17.0   inch x 11.0   inch
;; Statement   5.5   inch x  8.5   inch
;; Executive   7.5   inch x 10.0   inch
;; A3         11.69  inch x 16.5   inch = 29.7 cm x 42.0 cm
;; A4Small     7.47  inch x 10.85  inch
;; B4         10.125 inch x 14.33  inch
;; B5          7.16  inch x 10.125 inch

(defcustom ps-page-dimensions-database
  (list (list 'a4    (/ (* 72 21.0) 2.54) (/ (* 72 29.7) 2.54) "A4")
        (list 'a3    (/ (* 72 29.7) 2.54) (/ (* 72 42.0) 2.54) "A3")
        (list 'letter       (* 72  8.5)   (* 72 11.0)          "Letter")
        (list 'legal        (* 72  8.5)   (* 72 14.0)          "Legal")
        (list 'letter-small (* 72  7.68)  (* 72 10.16)         "LetterSmall")
        (list 'tabloid      (* 72 11.0)   (* 72 17.0)          "Tabloid")
        (list 'ledger       (* 72 17.0)   (* 72 11.0)          "Ledger")
        (list 'statement    (* 72  5.5)   (* 72  8.5)          "Statement")
        (list 'executive    (* 72  7.5)   (* 72 10.0)          "Executive")
        (list 'a4small      (* 72  7.47)  (* 72 10.85)         "A4Small")
        (list 'b4           (* 72 10.125) (* 72 14.33)         "B4")
        (list 'b5           (* 72  7.16)  (* 72 10.125)        "B5"))
  "*List associating a symbolic paper type to its width, height and doc media.
See `ps-paper-type'."
  :type '(repeat (list :tag "Paper Type"
                       (symbol :tag "Name")
                       (number :tag "Width")
                       (number :tag "Height")
                       (string :tag "Media")))
  :group 'ps-print-page)

;;;###autoload
(defcustom ps-paper-type 'letter
  "*Specify the size of paper to format for.
Should be one of the paper types defined in `ps-page-dimensions-database', for
example `letter', `legal' or `a4'."
  :type '(symbol :validate (lambda (wid)
                             (if (assq (widget-value wid)
                                       ps-page-dimensions-database)
                                 nil
                               (widget-put wid :error "Unknown paper size")
                               wid)))
  :group 'ps-print-page)

(defcustom ps-warn-paper-type t
  "*Non-nil means give an error if paper size is not equal to `ps-paper-type'.

It's used when `ps-spool-config' is set to `setpagedevice'."
  :type 'boolean
  :group 'ps-print-page)

(defcustom ps-landscape-mode nil
  "*Non-nil means print in landscape mode."
  :type 'boolean
  :group 'ps-print-page)

(defcustom ps-print-upside-down nil
  "*Non-nil means print upside-down."
  :type 'boolean
  :group 'ps-print-page)

(defcustom ps-selected-pages nil
  "*Specify which pages to print.

If it's nil, all pages are printed.

If it's a list, the list element may be an integer or a cons cell (FROM . TO)
designating FROM page to TO page; any invalid element is ignored, that is, an
integer lesser than one or if FROM is greater than TO.

Otherwise, it's treated as nil.

After ps-print processing `ps-selected-pages' is set to nil.  But the latest
`ps-selected-pages' is saved in `ps-last-selected-pages' (see it for
documentation).  So you can restore the latest selected pages by using
`ps-last-selected-pages' or by calling `ps-restore-selected-pages' command (see
it for documentation).

See also `ps-even-or-odd-pages'."
  :type '(repeat :tag "Selected Pages"
                 (radio :tag "Page"
                        (integer :tag "Number")
                        (cons :tag "Range"
                              (integer :tag "From")
                              (integer :tag "To"))))
  :group 'ps-print-page)

(defcustom ps-even-or-odd-pages nil
  "*Specify if it prints even/odd pages.

Valid values are:

   nil          print all pages.

   `even-page'  print only even pages.

   `odd-page'   print only odd pages.

   `even-sheet' print only even sheets.
                That is, if `ps-n-up-printing' is 1, it behaves as `even'; but
                for values greater than 1, it'll print only the even sheet of
                paper.

   `odd-sheet'  print only odd sheets.
                That is, if `ps-n-up-printing' is 1, it behaves as `odd'; but
                for values greater than 1, it'll print only the odd sheet of
                paper.

Any other value is treated as nil.

If you set `ps-selected-pages' (see it for documentation), first the pages are
filtered by `ps-selected-pages' and then by `ps-even-or-odd-pages'.  For
example, if we have:

   (setq ps-selected-pages '(1 4 (6 . 10) (12 . 16) 20))

Combining with `ps-even-or-odd-pages' and `ps-n-up-printing', we have:

`ps-n-up-printing' = 1:
   `ps-even-or-odd-pages'       PAGES PRINTED
        nil                     1, 4, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 20
        even-page               4, 6, 8, 10, 12, 14, 16, 20
        odd-page                1, 7, 9, 13, 15
        even-sheet              4, 6, 8, 10, 12, 14, 16, 20
        odd-sheet               1, 7, 9, 13, 15

`ps-n-up-printing' = 2:
   `ps-even-or-odd-pages'       PAGES PRINTED
        nil                     1/4, 6/7, 8/9, 10/12, 13/14, 15/16, 20
        even-page               4/6, 8/10, 12/14, 16/20
        odd-page                1/7, 9/13, 15
        even-sheet              6/7, 10/12, 15/16
        odd-sheet               1/4, 8/9, 13/14, 20

So even-page/odd-page are about page parity and even-sheet/odd-sheet are about
sheet parity."
  :type '(choice :menu-tag "Print Even/Odd Pages"
                 :tag "Print Even/Odd Pages"
                 (const :tag "All Pages" nil)
                 (const :tag "Only Even Pages" even-page)
                 (const :tag "Only Odd Pages" odd-page)
                 (const :tag "Only Even Sheets" even-sheet)
                 (const :tag "Only Odd Sheets" odd-sheet))
  :group 'ps-print-page)

(defcustom ps-print-control-characters 'control-8-bit
  "*Specify the printable form for control and 8-bit characters.
That is, instead of sending, for example, a ^D (\\004) to printer,
it is sent the string \"^D\".

Valid values are:

  `8-bit'         This is the value to use when you want an ASCII encoding of
                  any control or non-ASCII character.  Control characters are
                  encoded as \"^D\", and non-ASCII characters have an
                  octal encoding.

  `control-8-bit' This is the value to use when you want an ASCII encoding of
                  any control character, whether it is 7 or 8-bit.
                  European 8-bits accented characters are printed according
                  the current font.

  `control'       Only ASCII control characters have an ASCII encoding.
                  European 8-bits accented characters are printed according
                  the current font.

  nil             No ASCII encoding.  Any character is printed according the
                  current font.

Any other value is treated as nil."
  :type '(choice :menu-tag "Control Char"
                 :tag "Control Char"
                 (const 8-bit)   (const control-8-bit)
                 (const control) (const :tag "nil" nil))
  :group 'ps-print-miscellany)

(defcustom ps-n-up-printing 1
  "*Specify the number of pages per sheet paper."
  :type '(integer
          :tag "N Up Printing"
          :validate
          (lambda (wid)
            (if (and (< 0 (widget-value wid))
                     (<= (widget-value wid) 100))
                nil
              (widget-put
               wid :error
               "Number of pages per sheet paper must be between 1 and 100.")
              wid)))
  :group 'ps-print-n-up)

(defcustom ps-n-up-margin (/ (* 72  1.0) 2.54) ; 1 cm
  "*Specify the margin in points between the sheet border and n-up printing."
  :type 'number
  :group 'ps-print-n-up)

(defcustom ps-n-up-border-p t
  "*Non-nil means a border is drawn around each page."
  :type 'boolean
  :group 'ps-print-n-up)

(defcustom ps-n-up-filling 'left-top
  "*Specify how page matrix is filled on each sheet of paper.

Following are the valid values for `ps-n-up-filling' with a filling example
using a 3x4 page matrix:

   `left-top'   1  2  3  4         `left-bottom'    9  10 11 12
                5  6  7  8                          5  6  7  8
                9  10 11 12                         1  2  3  4

   `right-top'  4  3  2  1         `right-bottom'   12 11 10 9
                8  7  6  5                          8  7  6  5
                12 11 10 9                          4  3  2  1

   `top-left'   1  4  7  10        `bottom-left'    3  6  9  12
                2  5  8  11                         2  5  8  11
                3  6  9  12                         1  4  7  10

   `top-right'  10 7  4  1         `bottom-right'   12 9  6  3
                11 8  5  2                          11 8  5  2
                12 9  6  3                          10 7  4  1

Any other value is treated as `left-top'."
  :type '(choice :menu-tag "N-Up Filling"
                 :tag "N-Up Filling"
                 (const left-top)  (const left-bottom)
                 (const right-top) (const right-bottom)
                 (const top-left)  (const bottom-left)
                 (const top-right) (const bottom-right))
  :group 'ps-print-n-up)

(defcustom ps-number-of-columns (if ps-landscape-mode 2 1)
  "*Specify the number of columns"
  :type 'number
  :group 'ps-print-miscellany)

(defcustom ps-zebra-stripes nil
  "*Non-nil means print zebra stripes.
See also documentation for `ps-zebra-stripe-height' and `ps-zebra-color'."
  :type 'boolean
  :group 'ps-print-zebra)

(defcustom ps-zebra-stripe-height 3
  "*Number of zebra stripe lines.
See also documentation for `ps-zebra-stripes' and `ps-zebra-color'."
  :type 'number
  :group 'ps-print-zebra)

(defcustom ps-zebra-color 0.95
  "*Zebra stripe gray scale or RGB color.
See also documentation for `ps-zebra-stripes' and `ps-zebra-stripe-height'."
  :type '(choice :menu-tag "Zebra Gray/Color"
                 :tag "Zebra Gray/Color"
                 (number :tag "Gray Scale" :value 0.95)
                 (string :tag "Color Name" :value "gray95")
                 (list :tag "RGB Color" :value (0.95 0.95 0.95)
                       (number :tag "Red")
                       (number :tag "Green")
                       (number :tag "Blue")))
  :group 'ps-print-zebra)

(defcustom ps-zebra-stripe-follow nil
  "*Non-nil means zebra stripe continues on next page.

If `ps-zebra-stripe-follow' is nil, zebra stripe is restarted on each page.
If `ps-zebra-stripe-follow' is non-nil, zebra stripe continues on next page.

Visually, we have:

                `ps-zebra-stripe-follow'        `ps-zebra-stripe-follow'
                   is nil                          is non-nil
   Current Page ------------------------        ------------------------
                1  XXXXXXXXXXXXXXXXXXXXX        1  XXXXXXXXXXXXXXXXXXXXX
                2  XXXXXXXXXXXXXXXXXXXXX        2  XXXXXXXXXXXXXXXXXXXXX
                3  XXXXXXXXXXXXXXXXXXXXX        3  XXXXXXXXXXXXXXXXXXXXX
                4                               4
                5                               5
                6                               6
                7  XXXXXXXXXXXXXXXXXXXXX        7  XXXXXXXXXXXXXXXXXXXXX
                8  XXXXXXXXXXXXXXXXXXXXX        8  XXXXXXXXXXXXXXXXXXXXX
                ------------------------        ------------------------
      Next Page ------------------------        ------------------------
                9  XXXXXXXXXXXXXXXXXXXXX        9  XXXXXXXXXXXXXXXXXXXXX
                10 XXXXXXXXXXXXXXXXXXXXX        10
                11 XXXXXXXXXXXXXXXXXXXXX        11
                12                              12
                13                              13 XXXXXXXXXXXXXXXXXXXXX
                14                              14 XXXXXXXXXXXXXXXXXXXXX
                15 XXXXXXXXXXXXXXXXXXXXX        15 XXXXXXXXXXXXXXXXXXXXX
                16 XXXXXXXXXXXXXXXXXXXXX        16
                ------------------------        ------------------------"
  :type 'boolean
  :group 'ps-print-zebra)

(defcustom ps-line-number nil
  "*Non-nil means print line number."
  :type 'boolean
  :group 'ps-print-miscellany)

(defcustom ps-line-number-step 1
  "*Specify the interval that line number is printed.

For example, `ps-line-number-step' is set to 2, the printing will look like:

   1 one line
     one line
   3 one line
     one line
   5 one line
     one line
     ...

Valid values are:

   integer      an integer that specifies the interval that line number is
                printed.  If it's lesser than or equal to zero, it's used the
                value 1.

   `zebra'      specifies that only the line number of the first line in a zebra
                stripe is to be printed.

Any other value is treated as `zebra'."
  :type '(choice :menu-tag "Line Number Step"
                 :tag "Line Number Step"
                 (integer :tag "Step Interval")
                 (const :tag "Synchronize Zebra" zebra))
  :group 'ps-print-miscellany)

(defcustom ps-line-number-start 1
  "*Specify the starting point in the interval given by `ps-line-number-step'.

For example, if `ps-line-number-step' is set to 3 and `ps-line-number-start' is
set to 3, the printing will look like:

      one line
      one line
    3 one line
      one line
      one line
    6 one line
      one line
      one line
    9 one line
      one line
      ...

The values for `ps-line-number-start':

   * If `ps-line-number-step' is an integer, must be between 1 and the value
     of `ps-line-number-step' inclusive.

   * If `ps-line-number-step' is set to `zebra', must be between 1 and the
     value of `ps-zebra-strip-height' inclusive.  Use this combination if you
     wish that line number be relative to zebra stripes."
  :type '(integer :tag "Start Step Interval")
  :group 'ps-print-miscellany)

(defcustom ps-print-background-image nil
  "*EPS image list to be printed on background.

The elements are:

   (FILENAME X Y XSCALE YSCALE ROTATION PAGES...)

FILENAME is a file name which contains an EPS image or some PostScript
programming like EPS.
FILENAME is ignored, if it doesn't exist or is read protected.

X and Y are relative positions on paper to put the image.
If X and Y are nil, the image is centralized on paper.

XSCALE and YSCALE are scale factor to be applied to image before printing.
If XSCALE and YSCALE are nil, the original size is used.

ROTATION is the image rotation angle; if nil, the default is 0.

PAGES designates the page to print background image.
PAGES may be a number or a cons cell (FROM . TO) designating FROM page
to TO page.
If PAGES is nil, print background image on all pages.

X, Y, XSCALE, YSCALE and ROTATION may be a floating point number,
an integer number or a string. If it is a string, the string should contain
PostScript programming that returns a float or integer value.

For example, if you wish to print an EPS image on all pages do:

   '((\"~/images/EPS-image.ps\"))"
  :type '(repeat
          (list
           (file   :tag "EPS File")
           (choice :tag "X" (const :tag "default" nil) number string)
           (choice :tag "Y" (const :tag "default" nil) number string)
           (choice :tag "X Scale" (const :tag "default" nil) number string)
           (choice :tag "Y Scale" (const :tag "default" nil) number string)
           (choice :tag "Rotation" (const :tag "default" nil) number string)
           (repeat :tag "Pages" :inline t
                   (radio (integer :tag "Page")
                          (cons :tag "Range"
                                (integer :tag "From")
                                (integer :tag "To"))))))
  :group 'ps-print-background)

(defcustom ps-print-background-text nil
  "*Text list to be printed on background.

The elements are:

   (STRING X Y FONT FONTSIZE GRAY ROTATION PAGES...)

STRING is the text to be printed on background.

X and Y are positions on paper to put the text.
If X and Y are nil, the text is positioned at lower left corner.

FONT is a font name to be used on printing the text.
If nil, \"Times-Roman\" is used.

FONTSIZE is font size to be used, if nil, 200 is used.

GRAY is the text gray factor (should be very light like 0.8).
If nil, the default is 0.85.

ROTATION is the text rotation angle; if nil, the angle is given by
the diagonal from lower left corner to upper right corner.

PAGES designates the page to print background text.
PAGES may be a number or a cons cell (FROM . TO) designating FROM page
to TO page.
If PAGES is nil, print background text on all pages.

X, Y, FONTSIZE, GRAY and ROTATION may be a floating point number,
an integer number or a string. If it is a string, the string should contain
PostScript programming that returns a float or integer value.

For example, if you wish to print text \"Preliminary\" on all pages do:

   '((\"Preliminary\"))"
  :type '(repeat
          (list
           (string :tag "Text")
           (choice :tag "X" (const :tag "default" nil) number string)
           (choice :tag "Y" (const :tag "default" nil) number string)
           (choice :tag "Font" (const :tag "default" nil) string)
           (choice :tag "Fontsize" (const :tag "default" nil) number string)
           (choice :tag "Gray" (const :tag "default" nil) number string)
           (choice :tag "Rotation" (const :tag "default" nil) number string)
           (repeat :tag "Pages" :inline t
                   (radio (integer :tag "Page")
                          (cons :tag "Range"
                                (integer :tag "From")
                                (integer :tag "To"))))))
  :group 'ps-print-background)

;;; Horizontal layout

;;  ------------------------------------------
;;  |    |      |    |      |    |      |    |
;;  | lm | text | ic | text | ic | text | rm |
;;  |    |      |    |      |    |      |    |
;;  ------------------------------------------

(defcustom ps-left-margin   (/ (* 72  2.0) 2.54) ;   2 cm
  "*Left margin in points (1/72 inch)."
  :type 'number
  :group 'ps-print-horizontal)

(defcustom ps-right-margin  (/ (* 72  2.0) 2.54) ;   2 cm
  "*Right margin in points (1/72 inch)."
  :type 'number
  :group 'ps-print-horizontal)

(defcustom ps-inter-column  (/ (* 72  2.0) 2.54) ;   2 cm
  "*Horizontal space between columns in points (1/72 inch)."
  :type 'number
  :group 'ps-print-horizontal)

;;; Vertical layout

;; |--------|
;; | tm     |
;; |--------|
;; | header |
;; |--------|
;; | ho     |
;; |--------|
;; | text   |
;; |--------|
;; | bm     |
;; |--------|

(defcustom ps-bottom-margin (/ (* 72  1.5) 2.54) ; 1.5 cm
  "*Bottom margin in points (1/72 inch)."
  :type 'number
  :group 'ps-print-vertical)

(defcustom ps-top-margin    (/ (* 72  1.5) 2.54) ; 1.5 cm
  "*Top margin in points (1/72 inch)."
  :type 'number
  :group 'ps-print-vertical)

(defcustom ps-header-offset (/ (* 72  1.0) 2.54) ; 1.0 cm
  "*Vertical space in points (1/72 inch) between the main text and the header."
  :type 'number
  :group 'ps-print-vertical)

(defcustom ps-header-line-pad 0.15
  "*Portion of a header title line height to insert between the header frame
and the text it contains, both in the vertical and horizontal directions."
  :type 'number
  :group 'ps-print-vertical)

;;; Header setup

(defcustom ps-print-header t
  "*Non-nil means print a header at the top of each page.
By default, the header displays the buffer name, page number, and, if
the buffer is visiting a file, the file's directory.  Headers are
customizable by changing variables `ps-left-header' and
`ps-right-header'."
  :type 'boolean
  :group 'ps-print-headers)

(defcustom ps-print-only-one-header nil
  "*Non-nil means print only one header at the top of each page.
This is useful when printing more than one column, so it is possible
to have only one header over all columns or one header per column.
See also `ps-print-header'."
  :type 'boolean
  :group 'ps-print-headers)

(defcustom ps-print-header-frame t
  "*Non-nil means draw a gaudy frame around the header."
  :type 'boolean
  :group 'ps-print-headers)

(defcustom ps-header-lines 2
  "*Number of lines to display in page header, when generating PostScript."
  :type 'integer
  :group 'ps-print-headers)

(defcustom ps-switch-header 'duplex
  "*Specify if headers are switched or not.

Valid values are:

nil     Never switch headers.

t       Always switch headers.

duplex  Switch headers only when duplexing is on, that is, when
        `ps-spool-duplex' is non-nil.

Any other value is treated as t."
  :type '(choice :menu-tag "Switch Header"
                 :tag "Switch Header"
                 (const :tag "Never Switch" nil)
                 (const :tag "Always Switch" t)
                 (const :tag "Switch When Duplexing" duplex))
  :group 'ps-print-headers)

(defcustom ps-show-n-of-n t
  "*Non-nil means show page numbers as N/M, meaning page N of M.
NOTE: page numbers are displayed as part of headers,
      see variable `ps-print-header'."
  :type 'boolean
  :group 'ps-print-headers)

(defcustom ps-spool-config
  (if ps-windows-system
      nil
    'lpr-switches)
  "*Specify who is responsable for setting duplex and page size switches.

Valid values are:

  `lpr-switches'    duplex and page size are configured by `ps-lpr-switches'.
                    Don't forget to set `ps-lpr-switches' to select duplex
                    printing for your printer.

  `setpagedevice'   duplex and page size are configured by ps-print using the
                    setpagedevice PostScript operator.

  nil               duplex and page size are configured by ps-print *not* using
                    the setpagedevice PostScript operator.

Any other value is treated as nil.

WARNING: The setpagedevice PostScript operator affects ghostview utility when
         viewing file generated using landscape.  Also on some printers,
         setpagedevice affects zebra stripes; on other printers, setpagedevice
         affects the left margin.
         Besides all that, if your printer does not have the paper size
         specified by setpagedevice, your printing will be aborted.
         So, if you need to use setpagedevice, set `ps-spool-config' to
         `setpagedevice', generate a test file and send it to your printer; if
         the printed file isn't ok, set `ps-spool-config' to nil."
  :type '(choice :menu-tag "Spool Config"
                 :tag "Spool Config"
                 (const lpr-switches) (const setpagedevice)
                 (const :tag "nil" nil))
  :group 'ps-print-headers)

(defcustom ps-spool-duplex nil          ; Not many people have duplex printers,
                                        ; so default to nil.
  "*Non-nil generates PostScript for a two-sided printer.
For a duplex printer, the `ps-spool-*' and `ps-print-*' commands will insert
blank pages as needed between print jobs so that the next buffer printed will
start on the right page.  Also, if headers are turned on, the headers will be
reversed on duplex printers so that the page numbers fall to the left on
even-numbered pages.

See also `ps-spool-tumble'."
  :type 'boolean
  :group 'ps-print-headers)

(defcustom ps-spool-tumble nil
  "*Specify how the page images on opposite sides of a sheet are oriented.
If `ps-spool-tumble' is nil, produces output suitable for binding on the left or
right.  If `ps-spool-tumble' is non-nil, produces output suitable for binding at
the top or bottom.

It has effect only when `ps-spool-duplex' is non-nil."
  :type 'boolean
  :group 'ps-print-headers)

;;; Fonts

(defcustom ps-font-info-database
  '((Courier                            ; the family key
     (fonts (normal      . "Courier")
            (bold        . "Courier-Bold")
            (italic      . "Courier-Oblique")
            (bold-italic . "Courier-BoldOblique"))
     (size . 10.0)
     (line-height . 10.55)
     (space-width . 6.0)
     (avg-char-width . 6.0))
    (Helvetica                          ; the family key
     (fonts (normal      . "Helvetica")
            (bold        . "Helvetica-Bold")
            (italic      . "Helvetica-Oblique")
            (bold-italic . "Helvetica-BoldOblique"))
     (size . 10.0)
     (line-height . 11.56)
     (space-width . 2.78)
     (avg-char-width . 5.09243))
    (Times
     (fonts (normal      . "Times-Roman")
            (bold        . "Times-Bold")
            (italic      . "Times-Italic")
            (bold-italic . "Times-BoldItalic"))
     (size . 10.0)
     (line-height . 11.0)
     (space-width . 2.5)
     (avg-char-width . 4.71432))
    (Palatino
     (fonts (normal      . "Palatino-Roman")
            (bold        . "Palatino-Bold")
            (italic      . "Palatino-Italic")
            (bold-italic . "Palatino-BoldItalic"))
     (size . 10.0)
     (line-height . 12.1)
     (space-width . 2.5)
     (avg-char-width . 5.08676))
    (Helvetica-Narrow
     (fonts (normal      . "Helvetica-Narrow")
            (bold        . "Helvetica-Narrow-Bold")
            (italic      . "Helvetica-Narrow-Oblique")
            (bold-italic . "Helvetica-Narrow-BoldOblique"))
     (size . 10.0)
     (line-height . 11.56)
     (space-width . 2.2796)
     (avg-char-width . 4.17579))
    (NewCenturySchlbk
     (fonts (normal      . "NewCenturySchlbk-Roman")
            (bold        . "NewCenturySchlbk-Bold")
            (italic      . "NewCenturySchlbk-Italic")
            (bold-italic . "NewCenturySchlbk-BoldItalic"))
     (size . 10.0)
     (line-height . 12.15)
     (space-width . 2.78)
     (avg-char-width . 5.31162))
    ;; got no bold for the next ones
    (AvantGarde-Book
     (fonts (normal . "AvantGarde-Book")
            (italic . "AvantGarde-BookOblique"))
     (size . 10.0)
     (line-height . 11.77)
     (space-width . 2.77)
     (avg-char-width . 5.45189))
    (AvantGarde-Demi
     (fonts (normal . "AvantGarde-Demi")
            (italic . "AvantGarde-DemiOblique"))
     (size . 10.0)
     (line-height . 12.72)
     (space-width . 2.8)
     (avg-char-width . 5.51351))
    (Bookman-Demi
     (fonts (normal . "Bookman-Demi")
            (italic . "Bookman-DemiItalic"))
     (size . 10.0)
     (line-height . 11.77)
     (space-width . 3.4)
     (avg-char-width . 6.05946))
    (Bookman-Light
     (fonts (normal . "Bookman-Light")
            (italic . "Bookman-LightItalic"))
     (size . 10.0)
     (line-height . 11.79)
     (space-width . 3.2)
     (avg-char-width . 5.67027))
    ;; got no bold and no italic for the next ones
    (Symbol
     (fonts (normal . "Symbol"))
     (size . 10.0)
     (line-height . 13.03)
     (space-width . 2.5)
     (avg-char-width . 3.24324))
    (Zapf-Dingbats
     (fonts (normal . "Zapf-Dingbats"))
     (size . 10.0)
     (line-height . 9.63)
     (space-width . 2.78)
     (avg-char-width . 2.78))
    (Zapf-Chancery-MediumItalic
     (fonts (normal . "Zapf-Chancery-MediumItalic"))
     (size . 10.0)
     (line-height . 11.45)
     (space-width . 2.2)
     (avg-char-width . 4.10811))
    )
  "*Font info database: font family (the key), name, bold, italic, bold-italic,
reference size, line height, space width, average character width.
To get the info for another specific font (say Helvetica), do the following:
- create a new buffer
- generate the PostScript image to a file (C-u M-x ps-print-buffer)
- open this file and delete the leading `%' (which is the PostScript
  comment character) from the line
           `% 3 cm 20 cm moveto  10/Courier ReportFontInfo  showpage'
  to get the line
           `3 cm 20 cm moveto  10/Helvetica ReportFontInfo  showpage'
- add the values to `ps-font-info-database'.
You can get all the fonts of YOUR printer using `ReportAllFontInfo'.

Note also that ps-print DOESN'T download any font to your printer, instead
it uses the fonts resident in your printer."
  :type '(repeat (list :tag "Font Definition"
                       (symbol :tag "Font Family")
                       (cons :format "%v"
                             (const :format "" fonts)
                             (repeat :tag "Faces"
                                     (cons (choice (const normal)
                                                   (const bold)
                                                   (const italic)
                                                   (const bold-italic)
                                                   (symbol :tag "Face"))
                                           (string :tag "Font Name"))))
                       (cons :format "%v"
                             (const :format "" size)
                             (number :tag "Reference Size"))
                       (cons :format "%v"
                             (const :format "" line-height)
                             (number :tag "Line Height"))
                       (cons :format "%v"
                             (const :format "" space-width)
                             (number :tag "Space Width"))
                       (cons :format "%v"
                             (const :format "" avg-char-width)
                             (number :tag "Average Character Width"))))
  :group 'ps-print-font)

(defcustom ps-font-family 'Courier
  "*Font family name for ordinary text, when generating PostScript."
  :type 'symbol
  :group 'ps-print-font)

(defcustom ps-font-size   '(7 . 8.5)
  "*Font size, in points, for ordinary text, when generating PostScript."
  :type '(choice (number :tag "Text Size")
                 (cons :tag "Landscape/Portrait"
                       (number :tag "Landscape Text Size")
                       (number :tag "Portrait Text Size")))
  :group 'ps-print-font)

(defcustom ps-header-font-family      'Helvetica
  "*Font family name for text in the header, when generating PostScript."
  :type 'symbol
  :group 'ps-print-font)

(defcustom ps-header-font-size       '(10 . 12)
  "*Font size, in points, for text in the header, when generating PostScript."
  :type '(choice (number :tag "Header Size")
                 (cons :tag "Landscape/Portrait"
                       (number :tag "Landscape Header Size")
                       (number :tag "Portrait Header Size")))
  :group 'ps-print-font)

(defcustom ps-header-title-font-size '(12 . 14)
  "*Font size, in points, for the top line of text in header, in PostScript."
  :type '(choice (number :tag "Header Title Size")
                 (cons :tag "Landscape/Portrait"
                       (number :tag "Landscape Header Title Size")
                       (number :tag "Portrait Header Title Size")))
  :group 'ps-print-font)

;;; Colors

;; Printing color requires x-color-values.
(defcustom ps-print-color-p
  (or (and (fboundp 'color-values)      ; Emacs
           (ps-e-color-values "Green"))
      (fboundp 'x-color-values)         ; Emacs
      (fboundp 'color-instance-rgb-components))
                                        ; XEmacs
  "*Non-nil means print the buffer's text in color."
  :type 'boolean
  :group 'ps-print-color)

(defcustom ps-default-fg '(0.0 0.0 0.0)
  "*RGB values of the default foreground color.  Defaults to black."
  :type '(choice :menu-tag "Default Foreground Gray/Color"
                 :tag "Default Foreground Gray/Color"
                 (number :tag "Gray Scale" :value 0.0)
                 (string :tag "Color Name" :value "black")
                 (list :tag "RGB Color" :value (0.0 0.0 0.0)
                       (number :tag "Red")
                       (number :tag "Green")
                       (number :tag "Blue")))
  :group 'ps-print-color)

(defcustom ps-default-bg '(1.0 1.0 1.0)
  "*RGB values of the default background color.  Defaults to white."
  :type '(choice :menu-tag "Default Background Gray/Color"
                 :tag "Default Background Gray/Color"
                 (number :tag "Gray Scale" :value 1.0)
                 (string :tag "Color Name" :value "white")
                 (list :tag "RGB Color" :value (1.0 1.0 1.0)
                       (number :tag "Red")
                       (number :tag "Green")
                       (number :tag "Blue")))
  :group 'ps-print-color)

(defcustom ps-auto-font-detect t
  "*Non-nil means automatically detect bold/italic/underline face attributes.
If nil, we rely solely on the lists `ps-bold-faces', `ps-italic-faces',
and `ps-underlined-faces'."
  :type 'boolean
  :group 'ps-print-font)

(defcustom ps-bold-faces
  (unless ps-print-color-p
    '(font-lock-function-name-face
      font-lock-builtin-face
      font-lock-variable-name-face
      font-lock-keyword-face
      font-lock-warning-face))
  "*A list of the \(non-bold\) faces that should be printed in bold font.
This applies to generating PostScript."
  :type '(repeat face)
  :group 'ps-print-face)

(defcustom ps-italic-faces
  (unless ps-print-color-p
    '(font-lock-variable-name-face
      font-lock-type-face
      font-lock-string-face
      font-lock-comment-face
      font-lock-warning-face))
  "*A list of the \(non-italic\) faces that should be printed in italic font.
This applies to generating PostScript."
  :type '(repeat face)
  :group 'ps-print-face)

(defcustom ps-underlined-faces
  (unless ps-print-color-p
    '(font-lock-function-name-face
      font-lock-constant-face
      font-lock-warning-face))
  "*A list of the \(non-underlined\) faces that should be printed underlined.
This applies to generating PostScript."
  :type '(repeat face)
  :group 'ps-print-face)

(defcustom ps-use-face-background nil
  "*Specify if face background should be used.

Valid values are:

   t            always use face background color.
   nil          never use face background color.
   (face...)    list of faces whose background color will be used.

Any other value will be treated as t."
  :type '(choice :menu-tag "Use Face Background"
                 :tag "Use Face Background"
                 (const :tag "Always Use Face Background" t)
                 (const :tag "Never Use Face Background" nil)
                 (repeat :menu-tag "Face Background List"
                         :tag "Face Background List"
                         face))
  :group 'ps-print-face)

(defcustom ps-left-header
  (list 'ps-get-buffer-name 'ps-header-dirpart)
  "*The items to display (each on a line) on the left part of the page header.
This applies to generating PostScript.

The value should be a list of strings and symbols, each representing an
entry in the PostScript array HeaderLinesLeft.

Strings are inserted unchanged into the array; those representing
PostScript string literals should be delimited with PostScript string
delimiters '(' and ')'.

For symbols with bound functions, the function is called and should
return a string to be inserted into the array.  For symbols with bound
values, the value should be a string to be inserted into the array.
In either case, function or variable, the string value has PostScript
string delimiters added to it."
  :type '(repeat (choice string symbol))
  :group 'ps-print-headers)

(defcustom ps-right-header
  (list "/pagenumberstring load" 'time-stamp-mon-dd-yyyy 'time-stamp-hh:mm:ss)
  "*The items to display (each on a line) on the right part of the page header.
This applies to generating PostScript.

See the variable `ps-left-header' for a description of the format of
this variable."
  :type '(repeat (choice string symbol))
  :group 'ps-print-headers)

(defcustom ps-razzle-dazzle t
  "*Non-nil means report progress while formatting buffer."
  :type 'boolean
  :group 'ps-print-miscellany)

(defcustom ps-adobe-tag "%!PS-Adobe-3.0\n"
  "*Contains the header line identifying the output as PostScript.
By default, `ps-adobe-tag' contains the standard identifier.  Some
printers require slightly different versions of this line."
  :type 'string
  :group 'ps-print-miscellany)

(defcustom ps-build-face-reference t
  "*Non-nil means build the reference face lists.

ps-print sets this value to nil after it builds its internal reference
lists of bold and italic faces.  By settings its value back to t, you
can force ps-print to rebuild the lists the next time you invoke one
of the ...-with-faces commands.

You should set this value back to t after you change the attributes of
any face, or create new faces.  Most users shouldn't have to worry
about its setting, though."
  :type 'boolean
  :group 'ps-print-face)

(defcustom ps-always-build-face-reference nil
  "*Non-nil means always rebuild the reference face lists.

If this variable is non-nil, ps-print will rebuild its internal
reference lists of bold and italic faces *every* time one of the
...-with-faces commands is called.  Most users shouldn't need to set this
variable."
  :type 'boolean
  :group 'ps-print-face)

(defcustom ps-banner-page-when-duplexing nil
  "*Non-nil means the very first page is skipped.
It's like the very first character of buffer (or region) is ^L (\\014)."
  :type 'boolean
  :group 'ps-print-headers)

(defcustom ps-postscript-code-directory
  (or (and (fboundp 'locate-data-directory) ; xemacs
           (locate-data-directory "ps-print"))
      data-directory)                   ; emacs
  "*Directory where it's located the PostScript prologue file used by ps-print.
By default, this directory is the same as in the variable `data-directory'."
  :type 'directory
  :group 'ps-print-miscellany)


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Selected Pages


(defvar ps-last-selected-pages nil
  "Latest `ps-selected-pages' value.")


(defun ps-restore-selected-pages ()
  "Restore latest `ps-selected-pages' value."
  (interactive)
  (setq ps-selected-pages ps-last-selected-pages))


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Customization


;;;###autoload
(defun ps-print-customize ()
  "Customization of ps-print group."
  (interactive)
  (customize-group 'ps-print))


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; User commands


;;;###autoload
(defun ps-print-buffer (&optional filename)
  "Generate and print a PostScript image of the buffer.

Interactively, when you use a prefix argument (C-u), the command
prompts the user for a file name, and saves the PostScript image
in that file instead of sending it to the printer.

Noninteractively, the argument FILENAME is treated as follows: if it
is nil, send the image to the printer.  If FILENAME is a string, save
the PostScript image in a file with that name."
  (interactive (list (ps-print-preprint current-prefix-arg)))
  (ps-print-without-faces (point-min) (point-max) filename))


;;;###autoload
(defun ps-print-buffer-with-faces (&optional filename)
  "Generate and print a PostScript image of the buffer.
Like `ps-print-buffer', but includes font, color, and underline
information in the generated image.  This command works only if you
are using a window system, so it has a way to determine color values."
  (interactive (list (ps-print-preprint current-prefix-arg)))
  (ps-print-with-faces (point-min) (point-max) filename))


;;;###autoload
(defun ps-print-region (from to &optional filename)
  "Generate and print a PostScript image of the region.
Like `ps-print-buffer', but prints just the current region."
  (interactive (list (point) (mark) (ps-print-preprint current-prefix-arg)))
  (ps-print-without-faces from to filename t))


;;;###autoload
(defun ps-print-region-with-faces (from to &optional filename)
  "Generate and print a PostScript image of the region.
Like `ps-print-region', but includes font, color, and underline
information in the generated image.  This command works only if you
are using a window system, so it has a way to determine color values."
  (interactive (list (point) (mark) (ps-print-preprint current-prefix-arg)))
  (ps-print-with-faces from to filename t))


;;;###autoload
(defun ps-spool-buffer ()
  "Generate and spool a PostScript image of the buffer.
Like `ps-print-buffer' except that the PostScript image is saved in a
local buffer to be sent to the printer later.

Use the command `ps-despool' to send the spooled images to the printer."
  (interactive)
  (ps-spool-without-faces (point-min) (point-max)))


;;;###autoload
(defun ps-spool-buffer-with-faces ()
  "Generate and spool a PostScript image of the buffer.
Like `ps-spool-buffer', but includes font, color, and underline
information in the generated image.  This command works only if you
are using a window system, so it has a way to determine color values.

Use the command `ps-despool' to send the spooled images to the printer."
  (interactive)
  (ps-spool-with-faces (point-min) (point-max)))


;;;###autoload
(defun ps-spool-region (from to)
  "Generate a PostScript image of the region and spool locally.
Like `ps-spool-buffer', but spools just the current region.

Use the command `ps-despool' to send the spooled images to the printer."
  (interactive "r")
  (ps-spool-without-faces from to t))


;;;###autoload
(defun ps-spool-region-with-faces (from to)
  "Generate a PostScript image of the region and spool locally.
Like `ps-spool-region', but includes font, color, and underline
information in the generated image.  This command works only if you
are using a window system, so it has a way to determine color values.

Use the command `ps-despool' to send the spooled images to the printer."
  (interactive "r")
  (ps-spool-with-faces from to t))

;;;###autoload
(defun ps-despool (&optional filename)
  "Send the spooled PostScript to the printer.

Interactively, when you use a prefix argument (C-u), the command
prompts the user for a file name, and saves the spooled PostScript
image in that file instead of sending it to the printer.

Noninteractively, the argument FILENAME is treated as follows: if it
is nil, send the image to the printer.  If FILENAME is a string, save
the PostScript image in a file with that name."
  (interactive (list (ps-print-preprint current-prefix-arg)))
  (ps-do-despool filename))

;;;###autoload
(defun ps-line-lengths ()
  "Display the correspondence between a line length and a font size,
using the current ps-print setup.
Try: pr -t file | awk '{printf \"%3d %s\n\", length($0), $0}' | sort -r | head"
  (interactive)
  (ps-line-lengths-internal))

;;;###autoload
(defun ps-nb-pages-buffer (nb-lines)
  "Display number of pages to print this buffer, for various font heights.
The table depends on the current ps-print setup."
  (interactive (list (count-lines (point-min) (point-max))))
  (ps-nb-pages nb-lines))

;;;###autoload
(defun ps-nb-pages-region (nb-lines)
  "Display number of pages to print the region, for various font heights.
The table depends on the current ps-print setup."
  (interactive (list (count-lines (mark) (point))))
  (ps-nb-pages nb-lines))

;;;###autoload
(defun ps-setup ()
  "Return the current PostScript-generation setup."
  (format
   "
;;; ps-print version %s

\(setq ps-print-color-p         %s
      ps-lpr-command           %S
      ps-lpr-switches          %s
      ps-printer-name          %s
      ps-printer-name-option   %s
      ps-print-region-function %s
      ps-manual-feed           %S

      ps-paper-type          %s
      ps-warn-paper-type     %s
      ps-landscape-mode      %s
      ps-print-upside-down   %s
      ps-number-of-columns   %s

      ps-zebra-stripes       %s
      ps-zebra-stripe-height %s
      ps-zebra-stripe-follow %S
      ps-zebra-color         %s
      ps-line-number         %s
      ps-line-number-step    %s
      ps-line-number-start   %S

      ps-default-fg %s
      ps-default-bg %s

      ps-use-face-background %s

      ps-print-control-characters %s

      ps-print-background-image %s

      ps-print-background-text %s

      ps-error-handler-message %s
      ps-user-defined-prologue %s
      ps-print-prologue-header %s

      ps-left-margin                %s
      ps-right-margin               %s
      ps-inter-column               %s
      ps-bottom-margin              %s
      ps-top-margin                 %s
      ps-header-offset              %s
      ps-header-line-pad            %s
      ps-print-header               %s
      ps-print-only-one-header      %s
      ps-print-header-frame         %s
      ps-switch-header              %s
      ps-header-lines               %s
      ps-show-n-of-n                %s
      ps-spool-config               %s
      ps-spool-duplex               %s
      ps-spool-tumble               %s
      ps-banner-page-when-duplexing %s

      ps-n-up-printing %s
      ps-n-up-margin   %s
      ps-n-up-border-p %s
      ps-n-up-filling  %s

      ps-multibyte-buffer       %s
      ps-font-family            %s
      ps-font-size              %s
      ps-header-font-family     %s
      ps-header-font-size       %s
      ps-header-title-font-size %s

      ps-even-or-odd-pages   %s
      ps-selected-pages      %s
      ps-last-selected-pages %s)

;;; ps-print - end of settings
"
   ps-print-version
   ps-print-color-p
   ps-lpr-command
   (ps-print-quote ps-lpr-switches)
   (ps-print-quote ps-printer-name)
   (ps-print-quote ps-printer-name-option)
   (ps-print-quote ps-print-region-function)
   ps-manual-feed
   (ps-print-quote ps-paper-type)
   ps-warn-paper-type
   ps-landscape-mode
   ps-print-upside-down
   ps-number-of-columns
   ps-zebra-stripes
   ps-zebra-stripe-height
   ps-zebra-stripe-follow
   (ps-print-quote ps-zebra-color)
   ps-line-number
   (ps-print-quote ps-line-number-step)
   ps-line-number-start
   (ps-print-quote ps-default-fg)
   (ps-print-quote ps-default-bg)
   (ps-print-quote ps-use-face-background)
   (ps-print-quote ps-print-control-characters)
   (ps-print-quote ps-print-background-image)
   (ps-print-quote ps-print-background-text)
   (ps-print-quote ps-error-handler-message)
   (ps-print-quote ps-user-defined-prologue)
   (ps-print-quote ps-print-prologue-header)
   ps-left-margin
   ps-right-margin
   ps-inter-column
   ps-bottom-margin
   ps-top-margin
   ps-header-offset
   ps-header-line-pad
   ps-print-header
   ps-print-only-one-header
   ps-print-header-frame
   (ps-print-quote ps-switch-header)
   ps-header-lines
   ps-show-n-of-n
   (ps-print-quote ps-spool-config)
   ps-spool-duplex
   ps-spool-tumble
   ps-banner-page-when-duplexing
   ps-n-up-printing
   ps-n-up-margin
   ps-n-up-border-p
   (ps-print-quote ps-n-up-filling)
   (ps-print-quote ps-multibyte-buffer) ; see `ps-mule.el'
   (ps-print-quote ps-font-family)
   (ps-print-quote ps-font-size)
   (ps-print-quote ps-header-font-family)
   (ps-print-quote ps-header-font-size)
   (ps-print-quote ps-header-title-font-size)
   (ps-print-quote ps-even-or-odd-pages)
   (ps-print-quote ps-selected-pages)
   (ps-print-quote ps-last-selected-pages)))


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Utility functions and variables:


(defun ps-print-quote (sym)
  (cond ((null sym)
         nil)
        ((or (symbolp sym) (listp sym))
         (format "'%S" sym))
        ((stringp sym)
         (format "%S" sym))
        (t
         sym)))


(eval-and-compile
  (defvar ps-print-emacs-type
    (cond ((string-match "XEmacs" emacs-version) 'xemacs)
          ((string-match "Lucid" emacs-version) 'lucid)
          ((string-match "Epoch" emacs-version) 'epoch)
          (t 'emacs)))

  (if (memq ps-print-emacs-type '(lucid xemacs))
      (if (< emacs-minor-version 12)
          (setq ps-print-color-p nil))
    (require 'faces))                   ; face-font, face-underline-p,
                                        ; x-font-regexp

  ;; Return t if the device (which can be changed during an emacs session)
  ;; can handle colors.
  ;; This function is not yet implemented for GNU emacs.
  (cond ((and (eq ps-print-emacs-type 'xemacs)
              (>= emacs-minor-version 12)) ; xemacs
         (defun ps-color-device ()
           (eq (ps-x-device-class) 'color)))

        (t                              ; emacs
         (defun ps-color-device ()
           (if (fboundp 'color-values)
               (ps-e-color-values "Green")
             t))))


  (defun ps-mapper (extent list)
    (nconc list
           (list (list (ps-x-extent-start-position extent) 'push extent)
                 (list (ps-x-extent-end-position extent) 'pull extent)))
    nil)

  (defun ps-extent-sorter (a b)
    (< (ps-x-extent-priority a) (ps-x-extent-priority b)))

  (defun ps-xemacs-face-kind-p (face kind kind-regex)
    (let* ((frame-font (or (ps-x-face-font-instance face)
                           (ps-x-face-font-instance 'default)))
           (kind-cons
            (and frame-font
                 (assq kind
                       (ps-x-font-instance-properties frame-font))))
           (kind-spec (cdr-safe kind-cons))
           (case-fold-search t))
      (and kind-spec (string-match kind-regex kind-spec))))

  (defun ps-xemacs-color-name (color)
    (if (ps-x-color-specifier-p color)
        (ps-x-color-name color)
      color))

  (cond ((eq ps-print-emacs-type 'emacs) ; emacs

         (defun ps-color-values (x-color)
           (cond
            ((fboundp 'color-values)
             (ps-e-color-values x-color))
            ((fboundp 'x-color-values)
             (ps-e-x-color-values x-color))
            (t
             (error "No available function to determine X color values."))))

         (defalias 'ps-face-foreground-name 'face-foreground)
         (defalias 'ps-face-background-name 'face-background)

         (defun ps-face-bold-p (face)
           (or (face-bold-p face)
               (memq face ps-bold-faces)))

         (defun ps-face-italic-p (face)
           (or (face-italic-p face)
               (memq face ps-italic-faces)))
         )
                                        ; xemacs
                                        ; lucid
        (t                              ; epoch

         (or (ps-x-find-coding-system 'raw-text-unix)
             (ps-x-copy-coding-system 'no-conversion-unix 'raw-text-unix))

         (defun ps-color-values (x-color)
           (let ((color (ps-xemacs-color-name x-color)))
             (cond
              ((fboundp 'x-color-values)
               (ps-e-x-color-values color))
              ((and (fboundp 'color-instance-rgb-components)
                    (ps-color-device))
               (ps-x-color-instance-rgb-components
                (if (ps-x-color-instance-p x-color)
                    x-color
                  (ps-x-make-color-instance color))))
              (t
               (error "No available function to determine X color values.")))))

         (defun ps-face-foreground-name (face)
           (ps-xemacs-color-name (face-foreground face)))

         (defun ps-face-background-name (face)
           (ps-xemacs-color-name (face-background face)))

         (defun ps-face-bold-p (face)
           (or (ps-xemacs-face-kind-p face 'WEIGHT_NAME "bold\\|demibold")
               (memq face ps-bold-faces))) ; Kludge-compatible

         (defun ps-face-italic-p (face)
           (or (ps-xemacs-face-kind-p face 'ANGLE_NAME "i\\|o")
               (ps-xemacs-face-kind-p face 'SLANT "i\\|o")
               (memq face ps-italic-faces))) ; Kludge-compatible
         )))


(defvar ps-print-color-scale 1.0)

(defun ps-color-scale (color)
  ;; Scale 16-bit X-COLOR-VALUE to PostScript color value in [0, 1] interval.
  (mapcar #'(lambda (value) (/ value ps-print-color-scale))
          (ps-color-values color)))


(defun ps-face-underlined-p (face)
  (or (face-underline-p face)
      (memq face ps-underlined-faces)))


(require 'time-stamp)


(defun ps-prologue-file (filenumber)
  (save-excursion
    (let* ((filename (format "%sps-prin%d.ps"
                             ps-postscript-code-directory filenumber))
           (buffer
            (or (find-file-noselect filename 'no-warn 'rawfile)
                (error "ps-print PostScript prologue `%s' file was not found."
                       filename))))
      (set-buffer buffer)
      (prog1
          (buffer-string)
        (kill-buffer buffer)))))


(defvar ps-mark-code-directory nil)

(defvar ps-print-prologue-0 ""
  "ps-print PostScript error handler.")

(defvar ps-print-prologue-1 ""
  "ps-print PostScript prologue begin.")

(defvar ps-print-prologue-2 ""
  "ps-print PostScript prologue end.")

;; Start Editing Here:

(defvar ps-source-buffer nil)
(defvar ps-spool-buffer-name "*PostScript*")
(defvar ps-spool-buffer nil)

(defvar ps-output-head nil)
(defvar ps-output-tail nil)

(defvar ps-page-postscript 0)           ; page number
(defvar ps-page-order 0)                ; PostScript page counter
(defvar ps-page-sheet 0)                ; sheet counter
(defvar ps-page-column 0)               ; column counter
(defvar ps-page-printed 0)              ; total pages printed
(defvar ps-page-n-up 0)                 ; n-up counter
(defvar ps-showline-count 1)
(defvar ps-first-page nil)
(defvar ps-last-page nil)
(defvar ps-print-page-p t)

(defvar ps-control-or-escape-regexp nil)
(defvar ps-n-up-on nil)

(defvar ps-background-pages nil)
(defvar ps-background-all-pages nil)
(defvar ps-background-text-count 0)
(defvar ps-background-image-count 0)

(defvar ps-current-font 0)
(defvar ps-default-foreground nil)
(defvar ps-default-color nil)
(defvar ps-current-color nil)
(defvar ps-current-bg nil)

(defvar ps-razchunk 0)

(defvar ps-color-p nil)
(defvar ps-color-format
  (if (eq ps-print-emacs-type 'emacs)

      ;; Emacs understands the %f format; we'll use it to limit color RGB
      ;; values to three decimals to cut down some on the size of the
      ;; PostScript output.
      "%0.3f %0.3f %0.3f"

    ;; Lucid emacsen will have to make do with %s (princ) for floats.
    "%s %s %s"))

;; These values determine how much print-height to deduct when headers
;; are turned on.  This is a pretty clumsy way of handling it, but
;; it'll do for now.

(defvar ps-header-pad 0
  "Vertical and horizontal space between the header frame and the text.
This is in units of points (1/72 inch).")

;; Define accessors to the dimensions list.

(defmacro ps-page-dimensions-get-width  (dims) `(nth 0 ,dims))
(defmacro ps-page-dimensions-get-height (dims) `(nth 1 ,dims))
(defmacro ps-page-dimensions-get-media  (dims) `(nth 2 ,dims))

(defvar ps-landscape-page-height nil)

(defvar ps-print-width nil)
(defvar ps-print-height nil)

(defvar ps-height-remaining nil)
(defvar ps-width-remaining nil)

(defvar ps-font-size-internal nil)
(defvar ps-header-font-size-internal nil)
(defvar ps-header-title-font-size-internal nil)

\f
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Internal Variables


(defvar ps-print-face-extension-alist nil
  "Alist of symbolic faces *WITH* extension features (box, outline, etc).
An element of this list has the following form:

   (FACE . [BITS FG BG])

   FACE is a symbol denoting a face name
   BITS is a bit vector, where each bit correspond
      to a feature (bold, underline, etc)
      (see documentation for `ps-print-face-map-alist')
   FG foreground color (string or nil)
   BG background color (string or nil)

Don't change this list directly; instead,
use `ps-extend-face' and `ps-extend-face-list'.
See documentation for `ps-extend-face' for valid extension symbol.")


(defvar ps-print-face-alist nil
  "Alist of symbolic faces *WITHOUT* extension features (box, outline, etc).

An element of this list has the same form as an element of
`ps-print-face-extension-alist'.

Don't change this list directly; this list is used by `ps-face-attributes',
`ps-map-face' and `ps-build-reference-face-lists'.")


(defconst ps-print-face-map-alist
  '((bold        . 1)
    (italic      . 2)
    (underline   . 4)
    (strikeout   . 8)
    (overline    . 16)
    (shadow      . 32)
    (box         . 64)
    (outline     . 128))
  "Alist of all features and the corresponding bit mask.
Each symbol correspond to one bit in a bit vector.")

\f
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Remapping Faces


;;;###autoload
(defun ps-extend-face-list (face-extension-list &optional merge-p)
  "Extend face in `ps-print-face-extension-alist'.

If optional MERGE-P is non-nil, extensions in FACE-EXTENSION-LIST are merged
with face extension in `ps-print-face-extension-alist'; otherwise, overrides.

The elements in FACE-EXTENSION-LIST is like those for `ps-extend-face'.

See `ps-extend-face' for documentation."
  (while face-extension-list
    (ps-extend-face (car face-extension-list) merge-p)
    (setq face-extension-list (cdr face-extension-list))))


;;;###autoload
(defun ps-extend-face (face-extension &optional merge-p)
  "Extend face in `ps-print-face-extension-alist'.

If optional MERGE-P is non-nil, extensions in FACE-EXTENSION list are merged
with face extensions in `ps-print-face-extension-alist'; otherwise, overrides.

The elements of FACE-EXTENSION list have the form:

   (FACE-NAME FOREGROUND BACKGROUND EXTENSION...)

FACE-NAME is a face name symbol.

FOREGROUND and BACKGROUND may be nil or a string that denotes the
foreground and background colors respectively.

EXTENSION is one of the following symbols:
   bold      - use bold font.
   italic    - use italic font.
   underline - put a line under text.
   strikeout - like underline, but the line is in middle of text.
   overline  - like underline, but the line is over the text.
   shadow    - text will have a shadow.
   box       - text will be surrounded by a box.
   outline   - print characters as hollow outlines.

If EXTENSION is any other symbol, it is ignored."
  (let* ((face-name  (nth 0 face-extension))
         (foreground (nth 1 face-extension))
         (background (nth 2 face-extension))
         (ps-face (cdr (assq face-name ps-print-face-extension-alist)))
         (face-vector (or ps-face (vector 0 nil nil)))
         (face-bit (ps-extension-bit face-extension)))
    ;; extend face
    (aset face-vector 0 (if merge-p
                            (logior (aref face-vector 0) face-bit)
                          face-bit))
    (and foreground (stringp foreground) (aset face-vector 1 foreground))
    (and background (stringp background) (aset face-vector 2 background))
    ;; if face does not exist, insert it
    (or ps-face
        (setq ps-print-face-extension-alist
              (cons (cons face-name face-vector)
                    ps-print-face-extension-alist)))))


(defun ps-extension-bit (face-extension)
  (let ((face-bit 0))
    ;; map valid symbol extension to bit vector
    (setq face-extension (cdr (cdr face-extension)))
    (while (setq face-extension (cdr face-extension))
      (setq face-bit (logior face-bit
                             (or (cdr (assq (car face-extension)
                                            ps-print-face-map-alist))
                                 0))))
    face-bit))

\f
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Adapted from font-lock: (obsolete stuff)
;; Originally face attributes were specified via `font-lock-face-attributes'.
;; Users then changed the default face attributes by setting that variable.
;; However, we try and be back-compatible and respect its value if set except
;; for faces where M-x customize has been used to save changes for the face.


(defun ps-font-lock-face-attributes ()
  (and (boundp 'font-lock-mode) (symbol-value 'font-lock-mode)
       (boundp 'font-lock-face-attributes)
       (let ((face-attributes (symbol-value 'font-lock-face-attributes)))
         (while face-attributes
           (let* ((face-attribute
                   (car (prog1 face-attributes
                          (setq face-attributes (cdr face-attributes)))))
                  (face (car face-attribute)))
             ;; Rustle up a `defface' SPEC from a
             ;; `font-lock-face-attributes' entry.
             (unless (get face 'saved-face)
               (let ((foreground (nth 1 face-attribute))
                     (background (nth 2 face-attribute))
                     (bold-p (nth 3 face-attribute))
                     (italic-p (nth 4 face-attribute))
                     (underline-p (nth 5 face-attribute))
                     face-spec)
                 (when foreground
                   (setq face-spec (cons ':foreground
                                         (cons foreground face-spec))))
                 (when background
                   (setq face-spec (cons ':background
                                         (cons background face-spec))))
                 (when bold-p
                   (setq face-spec (append '(:bold t) face-spec)))
                 (when italic-p
                   (setq face-spec (append '(:italic t) face-spec)))
                 (when underline-p
                   (setq face-spec (append '(:underline t) face-spec)))
                 (custom-declare-face face (list (list t face-spec)) nil)
                 )))))))

\f
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Internal functions and variables


(defvar ps-print-hook nil)
(defvar ps-print-begin-sheet-hook nil)
(defvar ps-print-begin-page-hook nil)
(defvar ps-print-begin-column-hook nil)


(defun ps-print-without-faces (from to &optional filename region-p)
  (ps-spool-without-faces from to region-p)
  (ps-do-despool filename))


(defun ps-spool-without-faces (from to &optional region-p)
  (run-hooks 'ps-print-hook)
  (ps-printing-region region-p from)
  (ps-generate (current-buffer) from to 'ps-generate-postscript))


(defun ps-print-with-faces (from to &optional filename region-p)
  (ps-spool-with-faces from to region-p)
  (ps-do-despool filename))


(defun ps-spool-with-faces (from to &optional region-p)
  (run-hooks 'ps-print-hook)
  (ps-printing-region region-p from)
  (ps-generate (current-buffer) from to 'ps-generate-postscript-with-faces))


(defun ps-count-lines (from to)
  (+ (count-lines from to)
     (save-excursion
       (goto-char to)
       (if (= (current-column) 0) 1 0))))


(defvar ps-printing-region nil
  "Variable used to indicate if the region that ps-print is printing.
It is a cons, the car of which is the line number where the region begins, and
its cdr is the total number of lines in the buffer.  Formatting functions can
use this information to print the original line number (and not the number of
lines printed), and to indicate in the header that the printout is of a partial
file.")


(defvar ps-printing-region-p nil
  "Non-nil means ps-print is printing a region.")


(defun ps-printing-region (region-p from)
  (setq ps-printing-region-p region-p
        ps-printing-region
        (cons (if region-p
                  (ps-count-lines (point-min) from)
                1)
              (ps-count-lines (point-min) (point-max)))))

\f
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Internal functions


(defsubst ps-font-alist (font-sym)
  (get font-sym 'fonts))

(defun ps-font (font-sym font-type)
  "Font family name for text of `font-type', when generating PostScript."
  (let* ((font-list (ps-font-alist font-sym))
         (normal-font (cdr (assq 'normal font-list))))
    (while (and font-list (not (eq font-type (car (car font-list)))))
      (setq font-list (cdr font-list)))
    (or (cdr (car font-list)) normal-font)))

(defun ps-fonts (font-sym)
  (mapcar 'cdr (ps-font-alist font-sym)))

(defun ps-font-number (font-sym font-type)
  (or (ps-alist-position font-type (ps-font-alist font-sym))
      0))

(defsubst ps-line-height (font-sym)
  "The height of a line, for generating PostScript.
This is the value that ps-print uses to determine the height,
y-dimension, of the lines of text it has printed, and thus affects the
point at which page-breaks are placed.
The line-height is *not* the same as the point size of the font."
  (get font-sym 'line-height))

(defsubst ps-title-line-height (font-sym)
  "The height of a `title' line, for generating PostScript.
This is the value that ps-print uses to determine the height,
y-dimension, of the lines of text it has printed, and thus affects the
point at which page-breaks are placed.
The title-line-height is *not* the same as the point size of the font."
  (get font-sym 'title-line-height))

(defsubst ps-space-width (font-sym)
  "The width of a space character, for generating PostScript.
This value is used in expanding tab characters."
  (get font-sym 'space-width))

(defsubst ps-avg-char-width (font-sym)
  "The average width, in points, of a character, for generating PostScript.
This is the value that ps-print uses to determine the length,
x-dimension, of the text it has printed, and thus affects the point at
which long lines wrap around."
  (get font-sym 'avg-char-width))

(defun ps-line-lengths-internal ()
  "Display the correspondence between a line length and a font size,
using the current ps-print setup.
Try: pr -t file | awk '{printf \"%3d %s\n\", length($0), $0}' | sort -r | head"
  (let* ((ps-font-size-internal
          (or ps-font-size-internal
              (ps-get-font-size 'ps-font-size)))
         (ps-header-font-size-internal
          (or ps-header-font-size-internal
              (ps-get-font-size 'ps-header-font-size)))
         (ps-header-title-font-size-internal
          (or ps-header-title-font-size-internal
              (ps-get-font-size 'ps-header-title-font-size)))
         (buf (get-buffer-create "*Line-lengths*"))
         (ifs ps-font-size-internal)    ; initial font size
         (icw (ps-avg-char-width 'ps-font-for-text)) ; initial character width
         (print-width (progn (ps-get-page-dimensions)
                             ps-print-width))
         (ps-setup (ps-setup))          ; setup for the current buffer
         (fs-min 5)                     ; minimum font size
         cw-min                         ; minimum character width
         nb-cpl-max                     ; maximum nb of characters per line
         (fs-max 14)                    ; maximum font size
         cw-max                         ; maximum character width
         nb-cpl-min                     ; minimum nb of characters per line
         fs                             ; current font size
         cw                             ; current character width
         nb-cpl                         ; current nb of characters per line
         )
    (setq cw-min     (/ (* icw fs-min) ifs)
          nb-cpl-max (floor (/ print-width cw-min))
          cw-max     (/ (* icw fs-max) ifs)
          nb-cpl-min (floor (/ print-width cw-max))
          nb-cpl     nb-cpl-min)
    (set-buffer buf)
    (goto-char (point-max))
    (or (bobp) (insert "\n" (make-string 75 ?\;) "\n"))
    (insert ps-setup
            "\nnb char per line / font size\n")
    (while (<= nb-cpl nb-cpl-max)
      (setq cw (/ print-width (float nb-cpl))
            fs (/ (* ifs cw) icw))
      (insert (format "%16d   %s\n" nb-cpl fs))
      (setq nb-cpl (1+ nb-cpl)))
    (insert "\n")
    (display-buffer buf 'not-this-window)))

(defun ps-nb-pages (nb-lines)
  "Display correspondence between font size and the number of pages.
The correspondence is based on having NB-LINES lines of text,
and on the current ps-print setup."
  (let* ((ps-font-size-internal
          (or ps-font-size-internal
              (ps-get-font-size 'ps-font-size)))
         (ps-header-font-size-internal
          (or ps-header-font-size-internal
              (ps-get-font-size 'ps-header-font-size)))
         (ps-header-title-font-size-internal
          (or ps-header-title-font-size-internal
              (ps-get-font-size 'ps-header-title-font-size)))
         (buf (get-buffer-create "*Nb-Pages*"))
         (ifs ps-font-size-internal)    ; initial font size
         (ilh (ps-line-height 'ps-font-for-text)) ; initial line height
         (page-height (progn (ps-get-page-dimensions)
                             ps-print-height))
         (ps-setup (ps-setup))          ; setup for the current buffer
         (fs-min 4)                     ; minimum font size
         lh-min                         ; minimum line height
         nb-lpp-max                     ; maximum nb of lines per page
         nb-page-min                    ; minimum nb of pages
         (fs-max 14)                    ; maximum font size
         lh-max                         ; maximum line height
         nb-lpp-min                     ; minimum nb of lines per page
         nb-page-max                    ; maximum nb of pages
         fs                             ; current font size
         lh                             ; current line height
         nb-lpp                         ; current nb of lines per page
         nb-page                        ; current nb of pages
         )
    (setq lh-min      (/ (* ilh fs-min) ifs)
          nb-lpp-max  (floor (/ page-height lh-min))
          nb-page-min (ceiling (/ (float nb-lines) nb-lpp-max))
          lh-max      (/ (* ilh fs-max) ifs)
          nb-lpp-min  (floor (/ page-height lh-max))
          nb-page-max (ceiling (/ (float nb-lines) nb-lpp-min))
          nb-page     nb-page-min)
    (set-buffer buf)
    (goto-char (point-max))
    (or (bobp) (insert "\n" (make-string 75 ?\;) "\n"))
    (insert ps-setup
            (format "\nThere are %d lines.\n\n" nb-lines)
            "nb page / font size\n")
    (while (<= nb-page nb-page-max)
      (setq nb-lpp (ceiling (/ nb-lines (float nb-page)))
            lh     (/ page-height nb-lpp)
            fs     (/ (* ifs lh) ilh))
      (insert (format "%7d   %s\n" nb-page fs))
      (setq nb-page (1+ nb-page)))
    (insert "\n")
    (display-buffer buf 'not-this-window)))

;; macros used in `ps-select-font'
(defmacro ps-lookup (key) `(cdr (assq ,key font-entry)))
(defmacro ps-size-scale (key) `(/ (* (ps-lookup ,key) font-size) size))

(defun ps-select-font (font-family sym font-size title-font-size)
  (let ((font-entry (cdr (assq font-family ps-font-info-database))))
    (or font-entry
        (error "Don't have data to scale font %s. Known fonts families are %s"
               font-family
               (mapcar 'car ps-font-info-database)))
    (let ((size (ps-lookup 'size)))
      (put sym 'fonts (ps-lookup 'fonts))
      (put sym 'space-width (ps-size-scale 'space-width))
      (put sym 'avg-char-width (ps-size-scale 'avg-char-width))
      (put sym 'line-height (ps-size-scale 'line-height))
      (put sym 'title-line-height
           (/ (* (ps-lookup 'line-height) title-font-size) size)))))

(defun ps-get-page-dimensions ()
  (let ((page-dimensions (cdr (assq ps-paper-type ps-page-dimensions-database)))
        page-width page-height)
    (cond
     ((null page-dimensions)
      (error "`ps-paper-type' must be one of:\n%s"
             (mapcar 'car ps-page-dimensions-database)))
     ((< ps-number-of-columns 1)
      (error "The number of columns %d should be positive"
             ps-number-of-columns)))

    (ps-select-font ps-font-family 'ps-font-for-text
                    ps-font-size-internal ps-font-size-internal)
    (ps-select-font ps-header-font-family 'ps-font-for-header
                    ps-header-font-size-internal
                    ps-header-title-font-size-internal)

    (setq page-width  (ps-page-dimensions-get-width  page-dimensions)
          page-height (ps-page-dimensions-get-height page-dimensions))

    ;; Landscape mode
    (if ps-landscape-mode
        ;; exchange width and height
        (setq page-width (prog1 page-height (setq page-height page-width))))

    ;; It is used to get the lower right corner (only in landscape mode)
    (setq ps-landscape-page-height page-height)

    ;; | lm | text | ic | text | ic | text | rm |
    ;; page-width == lm  +  n * pw  +  (n - 1) * ic  +  rm
    ;; => pw == (page-width - lm -rm - (n - 1) * ic) / n
    (setq ps-print-width (/ (- page-width
                               ps-left-margin ps-right-margin
                               (* (1- ps-number-of-columns) ps-inter-column))
                            ps-number-of-columns))
    (if (<= ps-print-width 0)
        (error "Bad horizontal layout:
page-width           == %s
ps-left-margin       == %s
ps-right-margin      == %s
ps-inter-column      == %s
ps-number-of-columns == %s
| lm | text | ic | text | ic | text | rm |
page-width == lm  +  n * print-width  +  (n - 1) * ic  +  rm
=> print-width == %d !"
               page-width
               ps-left-margin
               ps-right-margin
               ps-inter-column
               ps-number-of-columns
               ps-print-width))

    (setq ps-print-height
          (- page-height ps-bottom-margin ps-top-margin))
    (if (<= ps-print-height 0)
        (error "Bad vertical layout:
ps-top-margin    == %s
ps-bottom-margin == %s
page-height == bm + print-height + tm
=> print-height == %d !"
               ps-top-margin
               ps-bottom-margin
               ps-print-height))
    ;; If headers are turned on, deduct the height of the header from
    ;; the print height.
    (if ps-print-header
        (setq ps-header-pad   (* ps-header-line-pad
                                 (ps-title-line-height 'ps-font-for-header))
              ps-print-height (- ps-print-height
                                 ps-header-offset
                                 ps-header-pad
                                 (ps-title-line-height 'ps-font-for-header)
                                 (* (ps-line-height 'ps-font-for-header)
                                    (1- ps-header-lines))
                                 ps-header-pad)))
    (if (<= ps-print-height 0)
        (error "Bad vertical layout:
ps-top-margin    == %s
ps-bottom-margin == %s
ps-header-offset == %s
ps-header-pad    == %s
header-height    == %s
page-height == bm + print-height + tm - ho - hh
=> print-height == %d !"
               ps-top-margin
               ps-bottom-margin
               ps-header-offset
               ps-header-pad
               (+ ps-header-pad
                  (ps-title-line-height 'ps-font-for-header)
                  (* (ps-line-height 'ps-font-for-header)
                     (1- ps-header-lines))
                  ps-header-pad)
               ps-print-height))))

(defun ps-print-preprint (prefix-arg)
  (and prefix-arg
       (or (numberp prefix-arg)
           (listp prefix-arg))
       (let* ((name   (concat (file-name-nondirectory (or (buffer-file-name)
                                                          (buffer-name)))
                              ".ps"))
              (prompt (format "Save PostScript to file: (default %s) " name))
              (res    (read-file-name prompt default-directory name nil)))
         (while (cond ((file-directory-p res)
                       (ding)
                       (setq prompt "It's a directory"))
                      ((not (file-writable-p res))
                       (ding)
                       (setq prompt "File is unwritable"))
                      ((file-exists-p res)
                       (setq prompt "File exists")
                       (not (y-or-n-p (format "File `%s' exists; overwrite? "
                                              res))))
                      (t nil))
           (setq res (read-file-name
                      (format "%s; save PostScript to file: " prompt)
                      (file-name-directory res) nil nil
                      (file-name-nondirectory res))))
         (if (file-directory-p res)
             (expand-file-name name (file-name-as-directory res))
           res))))

;; The following functions implement a simple list-buffering scheme so
;; that ps-print doesn't have to repeatedly switch between buffers
;; while spooling.  The functions `ps-output' and `ps-output-string' build
;; up the lists; the function `ps-flush-output' takes the lists and
;; insert its contents into the spool buffer (*PostScript*).

(defvar ps-string-escape-codes
  (let ((table (make-vector 256 nil))
        (char ?\000))
    ;; control characters
    (while (<= char ?\037)
      (aset table char (format "\\%03o" char))
      (setq char (1+ char)))
    ;; printable characters
    (while (< char ?\177)
      (aset table char (format "%c" char))
      (setq char (1+ char)))
    ;; DEL and 8-bit characters
    (while (<= char ?\377)
      (aset table char (format "\\%o" char))
      (setq char (1+ char)))
    ;; Override ASCII formatting characters with named escape code:
    (aset table ?\n "\\n")              ; [NL] linefeed
    (aset table ?\r "\\r")              ; [CR] carriage return
    (aset table ?\t "\\t")              ; [HT] horizontal tab
    (aset table ?\b "\\b")              ; [BS] backspace
    (aset table ?\f "\\f")              ; [NP] form feed
    ;; Escape PostScript escape and string delimiter characters:
    (aset table ?\\ "\\\\")
    (aset table ?\( "\\(")
    (aset table ?\) "\\)")
    table)
  "Vector used to map characters to PostScript string escape codes.")

(defun ps-output-string-prim (string)
  (insert "(")                          ;insert start-string delimiter
  (save-excursion                       ;insert string
    (insert (string-as-unibyte string)))
  ;; Find and quote special characters as necessary for PS
  ;; This skips everything except control chars, non-ASCII chars, (, ) and \.
  (while (progn (skip-chars-forward " -'*-[]-~") (not (eobp)))
    (let ((special (following-char)))
      (delete-char 1)
      (insert (aref ps-string-escape-codes special))))
  (goto-char (point-max))
  (insert ")"))                         ;insert end-string delimiter

(defun ps-init-output-queue ()
  (setq ps-output-head (list "")
        ps-output-tail ps-output-head))


(defun ps-selected-pages ()
  (while (progn
           (setq ps-first-page     (car (car ps-selected-pages))
                 ps-last-page      (cdr (car ps-selected-pages))
                 ps-selected-pages (cdr ps-selected-pages))
           (and ps-selected-pages
                (< ps-last-page ps-page-postscript)))))


(defun ps-print-page-p ()
  (setq ps-print-page-p
        (and (cond ((null ps-first-page))
                   ((<= ps-page-postscript ps-last-page)
                    (<= ps-first-page ps-page-postscript))
                   (ps-selected-pages
                    (ps-selected-pages)
                    (and (<= ps-first-page ps-page-postscript)
                         (<= ps-page-postscript ps-last-page)))
                   (t
                    nil))
             (cond ((eq ps-even-or-odd-pages 'even-page)
                    (= (logand ps-page-postscript 1) 0))
                   ((eq ps-even-or-odd-pages 'odd-page)
                    (= (logand ps-page-postscript 1) 1))
                   (t)
                   ))))


(defun ps-print-sheet-p ()
  (setq ps-print-page-p
        (cond ((eq ps-even-or-odd-pages 'even-sheet)
               (= (logand ps-page-sheet 1) 0))
              ((eq ps-even-or-odd-pages 'odd-sheet)
               (= (logand ps-page-sheet 1) 1))
              (t)
              )))


(defun ps-output (&rest args)
  (when ps-print-page-p
    (setcdr ps-output-tail args)
    (while (cdr ps-output-tail)
      (setq ps-output-tail (cdr ps-output-tail)))))

(defun ps-output-string (string)
  (ps-output t string))

;; Output strings in the list ARGS in the PostScript prologue part.
(defun ps-output-prologue (args)
  (ps-output 'prologue (if (stringp args) (list args) args)))

(defun ps-flush-output ()
  (save-excursion
    (set-buffer ps-spool-buffer)
    (goto-char (point-max))
    (while ps-output-head
      (let ((it (car ps-output-head)))
        (cond
         ((eq t it)
          (setq ps-output-head (cdr ps-output-head))
          (ps-output-string-prim (car ps-output-head)))
         ((eq 'prologue it)
          (setq ps-output-head (cdr ps-output-head))
          (save-excursion
            (search-backward "\nBeginDoc")
            (forward-char 1)
            (apply 'insert (car ps-output-head))))
         (t
          (insert it))))
      (setq ps-output-head (cdr ps-output-head))))
  (ps-init-output-queue))

(defun ps-insert-file (fname)
  (ps-flush-output)
  (save-excursion
    (set-buffer ps-spool-buffer)
    (goto-char (point-max))
    (insert-file fname)))

;; These functions insert the arrays that define the contents of the
;; headers.

(defun ps-generate-header-line (fonttag &optional content)
  (ps-output "  [ " fonttag " ")
  (cond
   ;; Literal strings should be output as is -- the string must
   ;; contain its own PS string delimiters, '(' and ')', if necessary.
   ((stringp content)
    (ps-output content))

   ;; Functions are called -- they should return strings; they will be
   ;; inserted as strings and the PS string delimiters added.
   ((and (symbolp content) (fboundp content))
    (ps-output-string (funcall content)))

   ;; Variables will have their contents inserted.  They should
   ;; contain strings, and will be inserted as strings.
   ((and (symbolp content) (boundp content))
    (ps-output-string (symbol-value content)))

   ;; Anything else will get turned into an empty string.
   (t
    (ps-output-string "")))
  (ps-output " ]\n"))

(defun ps-generate-header (name contents)
  (ps-output "/" name " [\n")
  (if (> ps-header-lines 0)
      (let ((count 1))
        (ps-generate-header-line "/h0" (car contents))
        (while (and (< count ps-header-lines)
                    (setq contents (cdr contents)))
          (ps-generate-header-line "/h1" (car contents))
          (setq count (1+ count)))
        (ps-output "] def\n"))))


(defun ps-output-boolean (name bool)
  (ps-output (format "/%s %s def\n" name (if bool "true" "false"))))


(defun ps-background-pages (page-list func)
  (if page-list
      (mapcar
       #'(lambda (pages)
           (let ((start (if (consp pages) (car pages) pages))
                 (end   (if (consp pages) (cdr pages) pages)))
             (and (integerp start) (integerp end) (<= start end)
                  (add-to-list 'ps-background-pages (vector start end func)))))
       page-list)
    (setq ps-background-all-pages (cons func ps-background-all-pages))))


(defconst ps-boundingbox-re
  "^%%BoundingBox:\
\\s-+\\([0-9.]+\\)\\s-+\\([0-9.]+\\)\\s-+\\([0-9.]+\\)\\s-+\\([0-9.]+\\)")


(defun ps-get-boundingbox ()
  (save-excursion
    (set-buffer ps-spool-buffer)
    (save-excursion
      (if (re-search-forward ps-boundingbox-re nil t)
          (vector (string-to-number     ; lower x
                   (buffer-substring (match-beginning 1) (match-end 1)))
                  (string-to-number     ; lower y
                   (buffer-substring (match-beginning 2) (match-end 2)))
                  (string-to-number     ; upper x
                   (buffer-substring (match-beginning 3) (match-end 3)))
                  (string-to-number     ; upper y
                   (buffer-substring (match-beginning 4) (match-end 4))))
        (vector 0 0 0 0)))))


;; Emacs understands the %f format; we'll use it to limit color RGB values
;; to three decimals to cut down some on the size of the PostScript output.
;; Lucid emacsen will have to make do with %s (princ) for floats.

(defvar ps-float-format (if (eq ps-print-emacs-type 'emacs)
                            "%0.3f "    ; emacs
                          "%s "))       ; Lucid emacsen


(defun ps-float-format (value &optional default)
  (let ((literal (or value default)))
    (if literal
        (format (if (numberp literal)
                    ps-float-format
                  "%s ")
                literal)
      " ")))


(defun ps-background-text ()
  (mapcar
   #'(lambda (text)
       (setq ps-background-text-count (1+ ps-background-text-count))
       (ps-output (format "/ShowBackText-%d{\n" ps-background-text-count))
       (ps-output-string (nth 0 text))  ; text
       (ps-output
        "\n"
        (ps-float-format (nth 4 text) 200.0) ; font size
        (format "/%s " (or (nth 3 text) "Times-Roman")) ; font name
        (ps-float-format (nth 6 text)
                         "PrintHeight PrintPageWidth atan") ; rotation
        (ps-float-format (nth 5 text) 0.85) ; gray
        (ps-float-format (nth 1 text) "0") ; x position
        (ps-float-format (nth 2 text) "0") ; y position
        "\nShowBackText}def\n")
       (ps-background-pages (nthcdr 7 text) ; page list
                            (format "ShowBackText-%d\n"
                                    ps-background-text-count)))
   ps-print-background-text))


(defun ps-background-image ()
  (mapcar
   #'(lambda (image)
       (let ((image-file (expand-file-name (nth 0 image))))
         (when (file-readable-p image-file)
           (setq ps-background-image-count (1+ ps-background-image-count))
           (ps-output
            (format "/ShowBackImage-%d{\n--back-- "
                    ps-background-image-count)
            (ps-float-format (nth 5 image) 0.0) ; rotation
            (ps-float-format (nth 3 image) 1.0) ; x scale
            (ps-float-format (nth 4 image) 1.0) ; y scale
            (ps-float-format (nth 1 image) ; x position
                             "PrintPageWidth 2 div")
            (ps-float-format (nth 2 image) ; y position
                             "PrintHeight 2 div BottomMargin add")
            "\nBeginBackImage\n")
           (ps-insert-file image-file)
           ;; coordinate adjustment to centralize image
           ;; around x and y position
           (let ((box (ps-get-boundingbox)))
             (save-excursion
               (set-buffer ps-spool-buffer)
               (save-excursion
                 (if (re-search-backward "^--back--" nil t)
                     (replace-match
                      (format "%s %s"
                              (ps-float-format
                               (- (+ (/ (- (aref box 2) (aref box 0)) 2.0)
                                     (aref box 0))))
                              (ps-float-format
                               (- (+ (/ (- (aref box 3) (aref box 1)) 2.0)
                                     (aref box 1)))))
                      t)))))
           (ps-output "\nEndBackImage}def\n")
           (ps-background-pages (nthcdr 6 image) ; page list
                                (format "ShowBackImage-%d\n"
                                        ps-background-image-count)))))
   ps-print-background-image))


(defun ps-background (page-number)
  (let (has-local-background)
    (mapcar #'(lambda (range)
                (and (<= (aref range 0) page-number)
                     (<= page-number (aref range 1))
                     (if has-local-background
                         (ps-output (aref range 2))
                       (setq has-local-background t)
                       (ps-output "/printLocalBackground{\n"
                                  (aref range 2)))))
            ps-background-pages)
    (and has-local-background (ps-output "}def\n"))))


;; Return a list of the distinct elements of LIST.
;; Elements are compared with `equal'.
(defun ps-remove-duplicates (list)
  (let (new (tail list))
    (while tail
      (or (member (car tail) new)
          (setq new (cons (car tail) new)))
      (setq tail (cdr tail)))
    (nreverse new)))


;; Find the first occurrence of ITEM in LIST.
;; Return the index of the matching item, or nil if not found.
;; Elements are compared with `eq'.
(defun ps-alist-position (item list)
  (let ((tail list) (index 0) found)
    (while tail
      (if (setq found (eq (car (car tail)) item))
          (setq tail nil)
        (setq index (1+ index)
              tail (cdr tail))))
    (and found index)))


(defconst ps-n-up-database
  '((a4
     (1   nil 1  1  0)
     (2   t   1  2  0)
     (4   nil 2  2  0)
     (6   t   2  3  1)
     (8   t   2  4  0)
     (9   nil 3  3  0)
     (12  t   3  4  2)
     (16  nil 4  4  0)
     (18  t   3  6  0)
     (20  nil 5  4  1)
     (25  nil 5  5  0)
     (30  nil 6  5  1)
     (32  t   4  8  0)
     (36  nil 6  6  0)
     (42  nil 7  6  1)
     (49  nil 7  7  0)
     (50  t   5  10 0)
     (56  nil 8  7  1)
     (64  nil 8  8  0)
     (72  nil 9  8  1)
     (81  nil 9  9  0)
     (90  nil 10 9  1)
     (100 nil 10 10 0))
    (a3
     (1   nil 1  1  0)
     (2   t   1  2  0)
     (4   nil 2  2  0)
     (6   t   2  3  1)
     (8   t   2  4  0)
     (9   nil 3  3  0)
     (12  nil 4  3  1)
     (16  nil 4  4  0)
     (18  t   3  6  0)
     (20  nil 5  4  1)
     (25  nil 5  5  0)
     (30  nil 6  5  1)
     (32  t   4  8  0)
     (36  nil 6  6  0)
     (42  nil 7  6  1)
     (49  nil 7  7  0)
     (50  t   5  10 0)
     (56  nil 8  7  1)
     (64  nil 8  8  0)
     (72  nil 9  8  1)
     (81  nil 9  9  0)
     (90  nil 10 9  1)
     (100 nil 10 10 0))
    (letter
     (1   nil 1  1  0)
     (2   t   1  2  0)                  ; adjusted by PostScript code
     (4   nil 2  2  0)
     (6   t   2  3  0)
     (9   nil 3  3  0)
     (12  nil 4  3  1)
     (16  nil 4  4  0)
     (20  nil 5  4  1)
     (25  nil 5  5  0)
     (30  nil 6  5  1)
     (36  nil 6  6  0)
     (40  t   5  8  0)
     (42  nil 7  6  1)
     (49  nil 7  7  0)
     (56  nil 8  7  1)
     (64  nil 8  8  0)
     (72  nil 9  8  1)
     (81  nil 9  9  0)
     (90  nil 10 9  1)
     (100 nil 10 10 0))
    (legal
     (1   nil 1  1  0)
     (2   t   1  2  0)
     (4   nil 2  2  0)
     (6   nil 3  2  1)
     (9   nil 3  3  0)
     (10  t   2  5  0)
     (12  nil 4  3  1)
     (16  nil 4  4  0)
     (20  nil 5  4  1)
     (25  nil 5  5  0)
     (30  nil 6  5  1)
     (36  nil 6  6  0)
     (42  nil 7  6  1)
     (49  nil 7  7  0)
     (56  nil 8  7  1)
     (64  nil 8  8  0)
     (70  t   5  14 0)
     (72  nil 9  8  1)
     (81  nil 9  9  0)
     (90  nil 10 9  1)
     (100 nil 10 10 0))
    (letter-small
     (1   nil 1  1  0)
     (2   t   1  2  0)                  ; adjusted by PostScript code
     (4   nil 2  2  0)
     (6   t   2  3  0)
     (9   nil 3  3  0)
     (12  t   3  4  1)
     (15  t   3  5  0)
     (16  nil 4  4  0)
     (20  nil 5  4  1)
     (25  nil 5  5  0)
     (28  t   4  7  0)
     (30  nil 6  5  1)
     (36  nil 6  6  0)
     (40  t   5  8  0)
     (42  nil 7  6  1)
     (49  nil 7  7  0)
     (56  nil 8  7  1)
     (60  t   6  10 0)
     (64  nil 8  8  0)
     (72  ni  9  8  1)
     (81  nil 9  9  0)
     (84  t   7  12 0)
     (90  nil 10 9  1)
     (100 nil 10 10 0))
    (tabloid
     (1   nil 1  1  0)
     (2   t   1  2  0)
     (4   nil 2  2  0)
     (6   t   2  3  1)
     (8   t   2  4  0)
     (9   nil 3  3  0)
     (12  nil 4  3  1)
     (16  nil 4  4  0)
     (20  nil 5  4  1)
     (25  nil 5  5  0)
     (30  nil 6  5  1)
     (36  nil 6  6  0)
     (42  nil 7  6  1)
     (49  nil 7  7  0)
     (56  nil 8  7  1)
     (64  nil 8  8  0)
     (72  nil 9  8  1)
     (81  nil 9  9  0)
     (84  t   6  14 0)
     (90  nil 10 9  1)
     (100 nil 10 10 0))
    ;; Ledger paper size is a special case, it is the only paper size where the
    ;; normal size is landscaped, that is, the height is smaller than width.
    ;; So, we use the special value `pag' in the `landscape' field.
    (ledger
     (1   nil 1  1  0)
     (2   pag 1  2  0)
     (4   nil 2  2  0)
     (6   pag 2  3  1)
     (8   pag 2  4  0)
     (9   nil 3  3  0)
     (12  nil 4  3  1)
     (16  nil 4  4  0)
     (20  nil 5  4  1)
     (25  nil 5  5  0)
     (30  nil 6  5  1)
     (36  nil 6  6  0)
     (42  nil 7  6  1)
     (49  nil 7  7  0)
     (56  nil 8  7  1)
     (64  nil 8  8  0)
     (72  nil 9  8  1)
     (81  nil 9  9  0)
     (84  pag 6  14 0)
     (90  nil 10 9  1)
     (100 nil 10 10 0))
    (statement
     (1   nil 1  1  0)
     (2   t   1  2  0)
     (4   nil 2  2  0)
     (6   nil 3  2  1)
     (9   nil 3  3  0)
     (10  t   2  5  0)
     (12  nil 4  3  1)
     (16  nil 4  4  0)
     (20  nil 5  4  1)
     (21  t   3  7  0)
     (25  nil 5  5  0)
     (30  nil 6  5  1)
     (36  nil 6  6  0)
     (40  t   4  10 0)
     (42  nil 7  6  1)
     (49  nil 7  7  0)
     (56  nil 8  7  1)
     (60  t   5  12 0)
     (64  nil 8  8  0)
     (72  nil 9  8  1)
     (81  nil 9  9  0)
     (90  nil 10 9  1)
     (100 nil 10 10 0))
    (executive
     (1   nil 1  1  0)
     (2   t   1  2  0)                  ; adjusted by PostScript code
     (4   nil 2  2  0)
     (6   t   2  3  0)
     (9   nil 3  3  0)
     (12  nil 4  3  1)
     (16  nil 4  4  0)
     (20  nil 5  4  1)
     (25  nil 5  5  0)
     (28  t   4  7  0)
     (30  nil 6  5  1)
     (36  nil 6  6  0)
     (42  nil 7  6  1)
     (45  t   5  9  0)
     (49  nil 7  7  0)
     (56  nil 8  7  1)
     (60  t   6  10 0)
     (64  nil 8  8  0)
     (72  nil 9  8  1)
     (81  nil 9  9  0)
     (84  t   7  12 0)
     (90  nil 10 9  1)
     (100 nil 10 10 0))
    (a4small
     (1   nil 1  1  0)
     (2   t   1  2  0)
     (4   nil 2  2  0)
     (6   t   2  3  1)
     (8   t   2  4  0)
     (9   nil 3  3  0)
     (12  nil 4  3  1)
     (16  nil 4  4  0)
     (18  t   3  6  0)
     (20  nil 5  4  1)
     (25  nil 5  5  0)
     (30  nil 6  5  1)
     (32  t   4  8  0)
     (36  nil 6  6  0)
     (42  nil 7  6  1)
     (49  nil 7  7  0)
     (50  t   5  10 0)
     (56  nil 8  7  1)
     (64  nil 8  8  0)
     (72  nil 9  8  1)
     (78  t   6  13 0)
     (81  nil 9  9  0)
     (90  nil 10 9  1)
     (100 nil 10 10 0))
    (b4
     (1   nil 1  1  0)
     (2   t   1  2  0)
     (4   nil 2  2  0)
     (6   t   2  3  1)
     (8   t   2  4  0)
     (9   nil 3  3  0)
     (12  nil 4  3  1)
     (16  nil 4  4  0)
     (18  t   3  6  0)
     (20  nil 5  4  1)
     (25  nil 5  5  0)
     (30  nil 6  5  1)
     (32  t   4  8  0)
     (36  nil 6  6  0)
     (42  nil 7  6  1)
     (49  nil 7  7  0)
     (50  t   5  10 0)
     (56  nil 8  7  1)
     (64  nil 8  8  0)
     (72  nil 9  8  1)
     (81  nil 9  9  0)
     (90  nil 10 9  1)
     (100 nil 10 10 0))
    (b5
     (1   nil 1  1  0)
     (2   t   1  2  0)
     (4   nil 2  2  0)
     (6   t   2  3  1)
     (8   t   2  4  0)
     (9   nil 3  3  0)
     (12  nil 4  3  1)
     (16  nil 4  4  0)
     (18  t   3  6  0)
     (20  nil 5  4  1)
     (25  nil 5  5  0)
     (30  nil 6  5  1)
     (32  t   4  8  0)
     (36  nil 6  6  0)
     (42  nil 7  6  1)
     (49  nil 7  7  0)
     (50  t   5  10 0)
     (56  nil 8  7  1)
     (64  nil 8  8  0)
     (72  nil 9  8  0)
     (81  nil 9  9  0)
     (90  nil 10 9  1)
     (98  t   7  14 0)
     (100 nil 10 10 0)))
  "Alist which is the page matrix database used for N-up printing.

Each element has the following form:

   (PAGE
    (MAX LANDSCAPE LINES COLUMNS COL-MISSING)
    ...)

Where:
PAGE is the page size used (see `ps-paper-type').
MAX is the maximum elements of this page matrix.
LANDSCAPE specifies if page matrix is landscaped, has the following valid
          values:
            nil   the sheet is in portrait mode.
            t     the sheet is in landscape mode.
            pag   the sheet is in portrait mode and page is in landscape mode.
LINES is the number of lines of page matrix.
COLUMNS is the number of columns of page matrix.
COL-MISSING is the number of columns missing to fill the sheet.")


(defmacro ps-n-up-landscape (mat) `(nth 1 ,mat))
(defmacro ps-n-up-lines     (mat) `(nth 2 ,mat))
(defmacro ps-n-up-columns   (mat) `(nth 3 ,mat))
(defmacro ps-n-up-missing   (mat) `(nth 4 ,mat))


(defun ps-n-up-printing ()
  ;; force `ps-n-up-printing' be in range 1 to 100.
  (setq ps-n-up-printing (max (min ps-n-up-printing 100) 1))
  ;; find suitable page matrix for a given `ps-paper-type'.
  (let ((the-list (cdr (assq ps-paper-type ps-n-up-database))))
    (and the-list
         (while (> ps-n-up-printing (caar the-list))
           (setq the-list (cdr the-list))))
    (car the-list)))


(defconst ps-n-up-filling-database
  '((left-top
     "PageWidth"                        ; N-Up-XColumn
     "0"                                ; N-Up-YColumn
     "N-Up-End 1 sub PageWidth mul neg" ; N-Up-XLine
     "LandscapePageHeight neg"          ; N-Up-YLine
     "N-Up-Lines"                       ; N-Up-Repeat
     "N-Up-Columns"                     ; N-Up-End
     "0"                                ; N-Up-XStart
     "0")                               ; N-Up-YStart
    (left-bottom
     "PageWidth"                        ; N-Up-XColumn
     "0"                                ; N-Up-YColumn
     "N-Up-End 1 sub PageWidth mul neg" ; N-Up-XLine
     "LandscapePageHeight"              ; N-Up-YLine
     "N-Up-Lines"                       ; N-Up-Repeat
     "N-Up-Columns"                     ; N-Up-End
     "0"                                ; N-Up-XStart
     "N-Up-Repeat 1 sub LandscapePageHeight mul neg") ; N-Up-YStart
    (right-top
     "PageWidth neg"                    ; N-Up-XColumn
     "0"                                ; N-Up-YColumn
     "N-Up-End 1 sub PageWidth mul"     ; N-Up-XLine
     "LandscapePageHeight neg"          ; N-Up-YLine
     "N-Up-Lines"                       ; N-Up-Repeat
     "N-Up-Columns"                     ; N-Up-End
     "N-Up-End 1 sub PageWidth mul"     ; N-Up-XStart
     "0")                               ; N-Up-YStart
    (right-bottom
     "PageWidth neg"                    ; N-Up-XColumn
     "0"                                ; N-Up-YColumn
     "N-Up-End 1 sub PageWidth mul"     ; N-Up-XLine
     "LandscapePageHeight"              ; N-Up-YLine
     "N-Up-Lines"                       ; N-Up-Repeat
     "N-Up-Columns"                     ; N-Up-End
     "N-Up-End 1 sub PageWidth mul"     ; N-Up-XStart
     "N-Up-Repeat 1 sub LandscapePageHeight mul neg") ; N-Up-YStart
    (top-left
     "0"                                ; N-Up-XColumn
     "LandscapePageHeight neg"          ; N-Up-YColumn
     "PageWidth"                        ; N-Up-XLine
     "N-Up-End 1 sub LandscapePageHeight mul" ; N-Up-YLine
     "N-Up-Columns"                     ; N-Up-Repeat
     "N-Up-Lines"                       ; N-Up-End
     "0"                                ; N-Up-XStart
     "0")                               ; N-Up-YStart
    (bottom-left
     "0"                                ; N-Up-XColumn
     "LandscapePageHeight"              ; N-Up-YColumn
     "PageWidth"                        ; N-Up-XLine
     "N-Up-End 1 sub LandscapePageHeight mul neg" ; N-Up-YLine
     "N-Up-Columns"                     ; N-Up-Repeat
     "N-Up-Lines"                       ; N-Up-End
     "0"                                ; N-Up-XStart
     "N-Up-End 1 sub LandscapePageHeight mul neg") ; N-Up-YStart
    (top-right
     "0"                                ; N-Up-XColumn
     "LandscapePageHeight neg"          ; N-Up-YColumn
     "PageWidth neg"                    ; N-Up-XLine
     "N-Up-End 1 sub LandscapePageHeight mul" ; N-Up-YLine
     "N-Up-Columns"                     ; N-Up-Repeat
     "N-Up-Lines"                       ; N-Up-End
     "N-Up-Repeat 1 sub PageWidth mul"  ; N-Up-XStart
     "0")                               ; N-Up-YStart
    (bottom-right
     "0"                                ; N-Up-XColumn
     "LandscapePageHeight"              ; N-Up-YColumn
     "PageWidth neg"                    ; N-Up-XLine
     "N-Up-End 1 sub LandscapePageHeight mul neg" ; N-Up-YLine
     "N-Up-Columns"                     ; N-Up-Repeat
     "N-Up-Lines"                       ; N-Up-End
     "N-Up-Repeat 1 sub PageWidth mul"  ; N-Up-XStart
     "N-Up-End 1 sub LandscapePageHeight mul neg")) ; N-Up-YStart
  "Alist for n-up printing initializations.

Each element has the following form:

   (KIND XCOL YCOL XLIN YLIN REPEAT END XSTART YSTART)

Where:
KIND is a valid value of `ps-n-up-filling'.
XCOL YCOL are the relative position for the next column.
XLIN YLIN are the relative position for the beginning of next line.
REPEAT is the number of repetions for external loop.
END is the number of repetions for internal loop and also the number of pages in
    a row.
XSTART YSTART are the relative position for the first page in a sheet.")


(defun ps-n-up-filling ()
  (cdr (or (assq ps-n-up-filling ps-n-up-filling-database)
           (assq 'left-top ps-n-up-filling-database))))


(defmacro ps-n-up-xcolumn (init) `(nth 0 ,init))
(defmacro ps-n-up-ycolumn (init) `(nth 1 ,init))
(defmacro ps-n-up-xline   (init) `(nth 2 ,init))
(defmacro ps-n-up-yline   (init) `(nth 3 ,init))
(defmacro ps-n-up-repeat  (init) `(nth 4 ,init))
(defmacro ps-n-up-end     (init) `(nth 5 ,init))
(defmacro ps-n-up-xstart  (init) `(nth 6 ,init))
(defmacro ps-n-up-ystart  (init) `(nth 7 ,init))


(defconst ps-error-handler-alist
  '((none             . 0)
    (paper            . 1)
    (system           . 2)
    (paper-and-system . 3))
  "Alist for error handler message")


(defun ps-begin-file ()
  (ps-get-page-dimensions)
  (setq ps-page-order 0
        ps-page-printed 0
        ps-background-text-count 0
        ps-background-image-count 0
        ps-background-pages nil
        ps-background-all-pages nil)

  (let ((dimensions (cdr (assq ps-paper-type ps-page-dimensions-database)))
        (tumble (if ps-landscape-mode (not ps-spool-tumble) ps-spool-tumble))
        (n-up (ps-n-up-printing))
        (n-up-filling (ps-n-up-filling)))
    (and ps-n-up-on (setq tumble (not tumble)))
    (ps-output
     ps-adobe-tag
     "%%Title: " (buffer-name)          ; Take job name from name of
                                        ; first buffer printed
     "\n%%Creator: " (user-full-name)
     " (using ps-print v" ps-print-version
     ")\n%%CreationDate: "
     (time-stamp-hh:mm:ss) " " (time-stamp-mon-dd-yyyy)
     "\n%%Orientation: "
     (if ps-landscape-mode "Landscape" "Portrait")
     "\n%%DocumentNeededResources: font Times-Roman Times-Italic\n%%+ font "
     (mapconcat 'identity
                (ps-remove-duplicates
                 (append (ps-fonts 'ps-font-for-text)
                         (list (ps-font 'ps-font-for-header 'normal)
                               (ps-font 'ps-font-for-header 'bold))))
                "\n%%+ font ")
     "\n%%DocumentMedia: " (ps-page-dimensions-get-media dimensions)
     (format " %d" (round (ps-page-dimensions-get-width dimensions)))
     (format " %d" (round (ps-page-dimensions-get-height dimensions)))
     " 0 () ()\n%%PageOrder: Ascend\n%%Pages: (atend)\n%%Requirements:"
     (if ps-spool-duplex
         (if tumble " duplex(tumble)\n" " duplex\n")
       "\n"))

    (ps-insert-string ps-print-prologue-header)

    (ps-output "%%EndComments\n%%BeginDefaults\n%%PageMedia: "
               (ps-page-dimensions-get-media dimensions)
               "\n%%EndDefaults\n\n%%BeginPrologue\n\n"
               "/languagelevel where{pop}{/languagelevel 1 def}ifelse\n"
               (format "/ErrorMessage  %s def\n\n"
                       (or (cdr (assoc ps-error-handler-message
                                       ps-error-handler-alist))
                           1))          ; send to paper
               ps-print-prologue-0
               "\n%%BeginProcSet: UserDefinedPrologue\n\n")

    (ps-insert-string ps-user-defined-prologue)

    (ps-output "\n%%EndProcSet\n\n")

    (ps-output-boolean "LandscapeMode      "
                       (or ps-landscape-mode
                           (eq (ps-n-up-landscape n-up) 'pag)))
    (ps-output-boolean "UpsideDown         " ps-print-upside-down)
    (ps-output (format "/NumberOfColumns     %d def\n" ps-number-of-columns)

               (format "/LandscapePageHeight %s def\n" ps-landscape-page-height)
               (format "/PrintPageWidth      %s def\n"
                       (- (* (+ ps-print-width ps-inter-column)
                             ps-number-of-columns)
                          ps-inter-column))
               (format "/PrintWidth   %s def\n" ps-print-width)
               (format "/PrintHeight  %s def\n" ps-print-height)

               (format "/LeftMargin   %s def\n" ps-left-margin)
               (format "/RightMargin  %s def\n" ps-right-margin)
               (format "/InterColumn  %s def\n" ps-inter-column)

               (format "/BottomMargin %s def\n" ps-bottom-margin)
               (format "/TopMargin    %s def\n" ps-top-margin) ; not used
               (format "/HeaderOffset %s def\n" ps-header-offset)
               (format "/HeaderPad    %s def\n" ps-header-pad))

    (ps-output-boolean "PrintHeader       " ps-print-header)
    (ps-output-boolean "PrintOnlyOneHeader" ps-print-only-one-header)
    (ps-output-boolean "PrintHeaderFrame  " ps-print-header-frame)
    (ps-output-boolean "SwitchHeader      " (if (eq ps-switch-header 'duplex)
                                                ps-spool-duplex
                                              ps-switch-header))
    (ps-output-boolean "ShowNofN          " ps-show-n-of-n)

    (let ((line-height (ps-line-height 'ps-font-for-text)))
      (ps-output (format "/LineHeight     %s def\n" line-height)
                 (format "/LinesPerColumn %d def\n"
                         (round (/ (+ ps-print-height
                                      (* line-height 0.45))
                                   line-height)))))

    (ps-output-boolean "WarnPaperSize   " ps-warn-paper-type)
    (ps-output-boolean "Zebra           " ps-zebra-stripes)
    (ps-output-boolean "ZebraFollow     " ps-zebra-stripe-follow)
    (ps-output-boolean "PrintLineNumber " ps-line-number)
    (ps-output-boolean "SyncLineZebra   " (not (integerp ps-line-number-step)))
    (ps-output (format "/PrintLineStep    %d def\n"
                       (if (integerp ps-line-number-step)
                           ps-line-number-step
                         ps-zebra-stripe-height))
               (format "/PrintLineStart   %d def\n" ps-line-number-start)
               (format "/ZebraHeight      %d def\n" ps-zebra-stripe-height)
               "/ZebraColor       "
               (ps-format-color ps-zebra-color 0.95)
               "def\n/BackgroundColor  "
               (ps-format-color ps-default-bg 1.0)
               "def\n/UseSetpagedevice "
               (if (eq ps-spool-config 'setpagedevice)
                   "/setpagedevice where{pop languagelevel 2 eq}{false}ifelse"
                 "false")
               " def\n\n/PageWidth "
               "PrintPageWidth LeftMargin add RightMargin add def\n\n"
               (format "/N-Up           %d def\n" ps-n-up-printing))
    (ps-output-boolean "N-Up-Landscape" (eq (ps-n-up-landscape n-up) t))
    (ps-output-boolean "N-Up-Border   " ps-n-up-border-p)
    (ps-output (format "/N-Up-Lines     %d def\n" (ps-n-up-lines n-up))
               (format "/N-Up-Columns   %d def\n" (ps-n-up-columns n-up))
               (format "/N-Up-Missing   %d def\n" (ps-n-up-missing n-up))
               (format "/N-Up-Margin    %s def\n" ps-n-up-margin)
               "/N-Up-Repeat    "
               (if ps-landscape-mode
                   (ps-n-up-end     n-up-filling)
                 (ps-n-up-repeat  n-up-filling))
               " def\n/N-Up-End       "
               (if ps-landscape-mode
                   (ps-n-up-repeat  n-up-filling)
                 (ps-n-up-end     n-up-filling))
               " def\n/N-Up-XColumn   " (ps-n-up-xcolumn n-up-filling)
               " def\n/N-Up-YColumn   " (ps-n-up-ycolumn n-up-filling)
               " def\n/N-Up-XLine     " (ps-n-up-xline   n-up-filling)
               " def\n/N-Up-YLine     " (ps-n-up-yline   n-up-filling)
               " def\n/N-Up-XStart    " (ps-n-up-xstart  n-up-filling)
               " def\n/N-Up-YStart    " (ps-n-up-ystart  n-up-filling) " def\n")

    (ps-background-text)
    (ps-background-image)
    (setq ps-background-all-pages (nreverse ps-background-all-pages)
          ps-background-pages (nreverse ps-background-pages))

    (ps-output "\n" ps-print-prologue-1)

    (ps-output "\n/printGlobalBackground{\n")
    (mapcar 'ps-output ps-background-all-pages)
    (ps-output "}def\n/printLocalBackground{\n}def\n")

    ;; Header fonts
    (ps-output (format "/h0 %s(%s)cvn DefFont\n" ; /h0 14 /Helvetica-Bold DefFont
                       ps-header-title-font-size-internal
                       (ps-font 'ps-font-for-header 'bold))
               (format "/h1 %s(%s)cvn DefFont\n" ; /h1 12 /Helvetica DefFont
                       ps-header-font-size-internal
                       (ps-font 'ps-font-for-header 'normal)))

    (ps-output "\n" ps-print-prologue-2 "\n")

    ;; Text fonts
    (let ((font (ps-font-alist 'ps-font-for-text))
          (i 0))
      (while font
        (ps-output (format "/f%d %s(%s)cvn DefFont\n"
                           i
                           ps-font-size-internal
                           (ps-font 'ps-font-for-text (car (car font)))))
        (setq font (cdr font)
              i (1+ i))))

    (let ((font-entry (cdr (assq ps-font-family ps-font-info-database))))
      (ps-output (format "/SpaceWidthRatio %f def\n"
                         (/ (ps-lookup 'space-width) (ps-lookup 'size)))))

    (ps-output "\n%%EndPrologue\n\n%%BeginSetup\n")
    (unless (eq ps-spool-config 'lpr-switches)
      (ps-output "\n%%BeginFeature: *Duplex "
                 (ps-boolean-capitalized ps-spool-duplex)
                 " *Tumble "
                 (ps-boolean-capitalized tumble)
                 "\nUseSetpagedevice\n{BMark/Duplex "
                 (ps-boolean-constant ps-spool-duplex)
                 "/Tumble "
                 (ps-boolean-constant tumble)
                 " EMark setpagedevice}\n{statusdict begin "
                 (ps-boolean-constant ps-spool-duplex)
                 " setduplexmode "
                 (ps-boolean-constant tumble)
                 " settumble end}ifelse\n%%EndFeature\n")))
  (ps-output "\n%%BeginFeature: *ManualFeed "
             (ps-boolean-capitalized ps-manual-feed)
             "\nBMark /ManualFeed "
             (ps-boolean-constant ps-manual-feed)
             " EMark setpagedevice\n%%EndFeature\n"
             "\n/Lines 0 def\n/PageCount 0 def\n\nBeginDoc\n%%EndSetup\n")
  (and ps-banner-page-when-duplexing
       (ps-output "\n%%Page: banner 0\nsave showpage restore\n")))


(defun ps-format-color (color &optional default)
  (let ((the-color (if (stringp color)
                       (ps-color-scale color)
                     color)))
    (if (and the-color (listp the-color))
        (concat "["
                (format ps-color-format
                        (nth 0 the-color)
                        (nth 1 the-color)
                        (nth 2 the-color))
                "] ")
      (ps-float-format (if (numberp the-color) the-color default)))))


(defun ps-insert-string (prologue)
  (let ((str (if (functionp prologue)
                 (funcall prologue)
               prologue)))
    (and (stringp str)
         (ps-output str))))


(defun ps-boolean-capitalized (bool)
  (if bool "True" "False"))


(defun ps-boolean-constant (bool)
  (if bool "true" "false"))


(defun ps-header-dirpart ()
  (let ((fname (buffer-file-name)))
    (if fname
        (if (string-equal (buffer-name) (file-name-nondirectory fname))
            (abbreviate-file-name (file-name-directory fname))
          fname)
      "")))


(defun ps-get-buffer-name ()
  (cond
   ;; Indulge Jim this little easter egg:
   ((string= (buffer-name) "ps-print.el")
    "Hey, Cool!  It's ps-print.el!!!")
   ;; Indulge Jack this other little easter egg:
   ((string= (buffer-name) "sokoban.el")
    "Super! C'est sokoban.el!")
   (t (concat
       (and ps-printing-region-p "Subset of: ")
       (buffer-name)
       (and (buffer-modified-p) " (unsaved)")))))


(defun ps-get-font-size (font-sym)
  (let ((font-size (symbol-value font-sym)))
    (cond ((numberp font-size)
           font-size)
          ((and (consp font-size)
                (numberp (car font-size))
                (numberp (cdr font-size)))
           (if ps-landscape-mode
               (car font-size)
             (cdr font-size)))
          (t
           (error "Invalid font size `%S' for `%S'" font-size font-sym)))))


(defun ps-begin-job ()
  ;; prologue files
  (let ((last-char (aref ps-postscript-code-directory
                         (1- (length ps-postscript-code-directory)))))
    (or (eq last-char ?/)
        (and ps-windows-system (eq last-char ?\\))
        (setq ps-postscript-code-directory
              (concat ps-postscript-code-directory "/"))))
  (or (equal ps-mark-code-directory ps-postscript-code-directory)
      (setq ps-print-prologue-0    (ps-prologue-file 0)
            ps-print-prologue-1    (ps-prologue-file 1)
            ps-print-prologue-2    (ps-prologue-file 2)
            ps-mark-code-directory ps-postscript-code-directory))
  ;; selected pages
  (let (new page)
    (while ps-selected-pages
      (setq page              (car ps-selected-pages)
            ps-selected-pages (cdr ps-selected-pages))
      (cond ((integerp page)
             (and (> page 0)
                  (setq new (cons (cons page page) new))))
            ((consp page)
             (and (integerp (car page)) (integerp (cdr page))
                  (> (car page) 0)
                  (<= (car page) (cdr page))
                  (setq new (cons page new))))))
    (setq ps-selected-pages      (sort new #'(lambda (one other)
                                               (< (car one) (car other))))
          ps-last-selected-pages ps-selected-pages
          ps-first-page          nil
          ps-last-page           nil))
  ;; face background
  (or (listp ps-use-face-background)
      (setq ps-use-face-background t))
  ;; line number
  (and (integerp ps-line-number-step)
       (<= ps-line-number-step 0)
       (setq ps-line-number-step 1))
  (setq ps-n-up-on           (> ps-n-up-printing 1)
        ps-line-number-start (max 1 (min ps-line-number-start
                                         (if (integerp ps-line-number-step)
                                             ps-line-number-step
                                           ps-zebra-stripe-height))))
  ;; spooling buffer
  (save-excursion
    (set-buffer ps-spool-buffer)
    (goto-char (point-max))
    (and (re-search-backward "^%%Trailer$" nil t)
         (delete-region (match-beginning 0) (point-max))))
  ;; miscellaneous
  (setq ps-page-postscript 0
        ps-page-sheet 0
        ps-page-n-up 0
        ps-page-column 0
        ps-print-page-p t
        ps-showline-count (car ps-printing-region)
        ps-font-size-internal        (ps-get-font-size 'ps-font-size)
        ps-header-font-size-internal (ps-get-font-size 'ps-header-font-size)
        ps-header-title-font-size-internal
        (ps-get-font-size 'ps-header-title-font-size)
        ps-control-or-escape-regexp
        (cond ((eq ps-print-control-characters '8-bit)
               (string-as-unibyte "[\000-\037\177-\377]"))
              ((eq ps-print-control-characters 'control-8-bit)
               (string-as-unibyte "[\000-\037\177-\237]"))
              ((eq ps-print-control-characters 'control)
               "[\000-\037\177]")
              (t "[\t\n\f]"))
        ps-default-foreground (ps-rgb-color ps-default-fg 0.0)
        ps-default-color (and ps-print-color-p ps-default-foreground)
        ps-current-color ps-default-color
        ;; Set the color scale.  We do it here instead of in the defvar so
        ;; that ps-print can be dumped into emacs.  This expression can't be
        ;; evaluated at dump-time because X isn't initialized.
        ps-color-p           (and ps-print-color-p (ps-color-device))
        ps-print-color-scale (if ps-color-p
                                 (float (car (ps-color-values "white")))
                               1.0)))


(defun ps-rgb-color (color default)
  (cond ((and color (listp color)) color)
        ((stringp color) (ps-color-scale color))
        ((numberp color) (list color color color))
        (t (list default default default))
        ))


(defun ps-page-number ()
  (if ps-print-only-one-header
      (1+ (/ (1- ps-page-column) ps-number-of-columns))
    ps-page-column))


(defun ps-next-page ()
  (ps-end-page)
  (ps-flush-output)
  (ps-begin-page))


(defun ps-header-sheet ()
  ;; Print only when a new sheet begins.
  (and ps-print-page-p (> ps-page-sheet 0)
       (ps-output "EndSheet\n"))
  (setq ps-page-sheet (1+ ps-page-sheet))
  (when (ps-print-sheet-p)
    (setq ps-page-order (1+ ps-page-order))
    (ps-output (if ps-n-up-on
                   (format "\n%%%%Page: (%d \\(%d\\)) %d\n"
                           ps-page-order ps-page-postscript ps-page-order)
                 (format "\n%%%%Page: %d %d\n"
                         ps-page-postscript ps-page-order))
               (format "%d BeginSheet\nBeginDSCPage\n"
                       ps-n-up-printing))))


(defun ps-header-page ()
  ;; set total line and page number when printing has finished
  ;; (see `ps-generate')
  (if (zerop (mod ps-page-column ps-number-of-columns))
      (progn
        (setq ps-page-postscript (1+ ps-page-postscript))
        (when (ps-print-page-p)
          (ps-print-sheet-p)
          (if (zerop (mod ps-page-n-up ps-n-up-printing))
              ;; Print only when a new sheet begins.
              (progn
                (ps-header-sheet)
                (run-hooks 'ps-print-begin-sheet-hook))
            ;; Print only when a new page begins.
            (ps-output "BeginDSCPage\n")
            (run-hooks 'ps-print-begin-page-hook))
          (ps-background ps-page-postscript)
          (setq ps-page-n-up (1+ ps-page-n-up))
          (and ps-print-page-p
               (setq ps-page-printed (1+ ps-page-printed)))))
    ;; Print only when a new column begins.
    (ps-output "BeginDSCPage\n")
    (run-hooks 'ps-print-begin-column-hook))
  (setq ps-page-column (1+ ps-page-column)))

(defun ps-begin-page ()
  (ps-get-page-dimensions)
  (setq ps-width-remaining  ps-print-width
        ps-height-remaining ps-print-height)

  (ps-header-page)

  (ps-output (format "/LineNumber %d def\n" ps-showline-count)
             (format "/PageNumber %d def\n" (ps-page-number)))

  (when ps-print-header
    (ps-generate-header "HeaderLinesLeft"    ps-left-header)
    (ps-generate-header "HeaderLinesRight"   ps-right-header)
    (ps-output (format "%d SetHeaderLines\n" ps-header-lines)))

  (ps-output "BeginPage\n")
  (ps-set-font  ps-current-font)
  (ps-set-bg    ps-current-bg)
  (ps-set-color ps-current-color)
  (ps-mule-begin-page))

(defun ps-end-page ()
  (ps-output "EndPage\nEndDSCPage\n"))

(defun ps-next-line ()
  (setq ps-showline-count (1+ ps-showline-count))
  (let ((lh (ps-line-height 'ps-font-for-text)))
    (if (< ps-height-remaining lh)
        (ps-next-page)
      (setq ps-width-remaining  ps-print-width
            ps-height-remaining (- ps-height-remaining lh))
      (ps-output "HL\n"))))

(defun ps-continue-line ()
  (let ((lh (ps-line-height 'ps-font-for-text)))
    (if (< ps-height-remaining lh)
        (ps-next-page)
      (setq ps-width-remaining  ps-print-width
            ps-height-remaining (- ps-height-remaining lh))
      (ps-output "SL\n"))))

(defun ps-find-wrappoint (from to char-width)
  (let ((avail (truncate (/ ps-width-remaining char-width)))
        (todo (- to from)))
    (if (< todo avail)
        (cons to (* todo char-width))
      (cons (+ from avail) ps-width-remaining))))

(defun ps-basic-plot-string (from to &optional bg-color)
  (let* ((wrappoint (ps-find-wrappoint from to
                                       (ps-avg-char-width 'ps-font-for-text)))
         (to (car wrappoint))
         (string (buffer-substring-no-properties from to)))
    (ps-mule-prepare-ascii-font string)
    (ps-output-string string)
    (ps-output " S\n")
    wrappoint))

(defun ps-basic-plot-whitespace (from to &optional bg-color)
  (let* ((wrappoint (ps-find-wrappoint from to
                                       (ps-space-width 'ps-font-for-text)))
         (to (car wrappoint)))
    (ps-output (format "%d W\n" (- to from)))
    wrappoint))

(defun ps-plot (plotfunc from to &optional bg-color)
  (while (< from to)
    (let* ((wrappoint (funcall plotfunc from to bg-color))
           (plotted-to (car wrappoint))
           (plotted-width (cdr wrappoint)))
      (setq from plotted-to
            ps-width-remaining (- ps-width-remaining plotted-width))
      (if (< from to)
          (ps-continue-line))))
  (if ps-razzle-dazzle
      (let* ((q-todo (- (point-max) (point-min)))
             (q-done (- (point) (point-min)))
             (chunkfrac (/ q-todo 8))
             (chunksize (min chunkfrac 1000)))
        (if (> (- q-done ps-razchunk) chunksize)
            (progn
              (setq ps-razchunk q-done)
              (message "Formatting...%3d%%"
                       (if (< q-todo 100)
                           (/ (* 100 q-done) q-todo)
                         (/ q-done (/ q-todo 100)))
                       ))))))

(defvar ps-last-font nil)

(defun ps-set-font (font)
  (setq ps-last-font (format "f%d" (setq ps-current-font font)))
  (ps-output (format "/%s F\n" ps-last-font)))

(defun ps-set-bg (color)
  (if (setq ps-current-bg color)
      (ps-output (format ps-color-format
                         (nth 0 color) (nth 1 color) (nth 2 color))
                 " true BG\n")
    (ps-output "false BG\n")))

(defun ps-set-color (color)
  (setq ps-current-color (or color ps-default-foreground))
  (ps-output (format ps-color-format
                     (nth 0 ps-current-color)
                     (nth 1 ps-current-color) (nth 2 ps-current-color))
             " FG\n"))


(defvar ps-current-effect 0)


(defun ps-plot-region (from to font &optional fg-color bg-color effects)
  (if (not (equal font ps-current-font))
      (ps-set-font font))

  ;; Specify a foreground color only if one's specified and it's
  ;; different than the current.
  (if (not (equal fg-color ps-current-color))
      (ps-set-color fg-color))

  (if (not (equal bg-color ps-current-bg))
      (ps-set-bg bg-color))

  ;; Specify effects (underline, overline, box, etc)
  (cond
   ((not (integerp effects))
    (ps-output "0 EF\n")
    (setq ps-current-effect 0))
   ((/= effects ps-current-effect)
    (ps-output (number-to-string effects) " EF\n")
    (setq ps-current-effect effects)))

  ;; Starting at the beginning of the specified region...
  (save-excursion
    (goto-char from)

    ;; ...break the region up into chunks separated by tabs, linefeeds,
    ;; pagefeeds, control characters, and plot each chunk.
    (while (< from to)
      (if (re-search-forward ps-control-or-escape-regexp to t)
          ;; region with some control characters or some multi-byte characters
          (let* ((match-point (match-beginning 0))
                 (match       (char-after match-point))
                 (composition (ps-e-find-composition from (1+ match-point))))
            (if composition
                (if (and (nth 2 composition)
                         (<= (car composition) match-point))
                    (progn
                      (setq match-point (car composition)
                            match 0)
                      (goto-char (nth 1 composition)))
                  (setq composition nil)))
            (when (< from match-point)
              (ps-mule-set-ascii-font)
              (ps-plot 'ps-basic-plot-string from match-point bg-color))
            (cond
             ((= match ?\t)             ; tab
              (let ((linestart (line-beginning-position)))
                (forward-char -1)
                (setq from (+ linestart (current-column)))
                (when (re-search-forward "[ \t]+" to t)
                  (ps-mule-set-ascii-font)
                  (ps-plot 'ps-basic-plot-whitespace
                           from (+ linestart (current-column))
                           bg-color))))

             ((= match ?\n)             ; newline
              (ps-next-line))

             ((= match ?\f)             ; form feed
              ;; do not skip page if previous character is NEWLINE and
              ;; it is a beginning of page.
              (or (and (equal (char-after (1- match-point)) ?\n)
                       (= ps-height-remaining ps-print-height))
                  (ps-next-page)))

             (composition               ; a composite sequence
              (ps-plot 'ps-mule-plot-composition match-point (point) bg-color))

             ((> match 255)             ; a multi-byte character
              (let* ((charset (char-charset match))
                     (composition (ps-e-find-composition match-point to))
                     (stop (if (nth 2 composition) (car composition) to)))
                (or (eq charset 'composition)
                    (while (and (< (point) stop) (eq (charset-after) charset))
                      (forward-char 1)))
                (ps-plot 'ps-mule-plot-string match-point (point) bg-color)))
                                        ; characters from ^@ to ^_ and
             (t                         ; characters from 127 to 255
              (ps-control-character match)))
            (setq from (point)))
        ;; region without control characters nor multi-byte characters
        (ps-mule-set-ascii-font)
        (ps-plot 'ps-basic-plot-string from to bg-color)
        (setq from to)))))

(defvar ps-string-control-codes
  (let ((table (make-vector 256 nil))
        (char ?\000))
    ;; control character
    (while (<= char ?\037)
      (aset table char (format "^%c" (+ char ?@)))
      (setq char (1+ char)))
    ;; printable character
    (while (< char ?\177)
      (aset table char (format "%c" char))
      (setq char (1+ char)))
    ;; DEL
    (aset table char "^?")
    ;; 8-bit character
    (while (<= (setq char (1+ char)) ?\377)
      (aset table char (format "\\%o" char)))
    table)
  "Vector used to map characters to a printable string.")

(defun ps-control-character (char)
  (let* ((str (aref ps-string-control-codes char))
         (from (1- (point)))
         (len (length str))
         (to (+ from len))
         (char-width (ps-avg-char-width 'ps-font-for-text))
         (wrappoint (ps-find-wrappoint from to char-width)))
    (if (< (car wrappoint) to)
        (ps-continue-line))
    (setq ps-width-remaining (- ps-width-remaining (* len char-width)))
    (ps-mule-prepare-ascii-font str)
    (ps-output-string str)
    (ps-output " S\n")))


(defun ps-face-attributes (face)
  "Return face attribute vector.

If FACE is not in `ps-print-face-extension-alist' or in
`ps-print-face-alist', insert it on `ps-print-face-alist' and
return the attribute vector.

If FACE is not a valid face name, it is used default face."
  (cond
   ((symbolp face)
    (cdr (or (assq face ps-print-face-extension-alist)
             (assq face ps-print-face-alist)
             (let* ((the-face (if (facep face) face 'default))
                    (new-face (ps-screen-to-bit-face the-face)))
               (or (and (eq the-face 'default)
                        (assq the-face ps-print-face-alist))
                   (setq ps-print-face-alist
                         (cons new-face ps-print-face-alist)))
               new-face))))
   ((eq (car face) 'foreground-color)
    (vector 0 (cdr face) nil))
   ((eq (car face) 'background-color)
    (vector 0 nil (cdr face)))
   (t
    (vector 0 nil nil))))


(defun ps-face-background (face background)
  (and (or (eq ps-use-face-background t)
           (cond ((symbolp face)
                  (memq face ps-use-face-background))
                 ((listp face)
                  (or (memq (car face) '(foreground-color background-color))
                      (let (ok)
                        (while face
                          (if (or (memq (car face) ps-use-face-background)
                                  (memq (car face)
                                        '(foreground-color background-color)))
                              (setq face nil
                                    ok   t)
                            (setq face (cdr face))))
                        ok)))
                 (t
                  nil)
                 ))
       background))


(defun ps-face-attribute-list (face-or-list)
  (cond
   ;; simple face
   ((not (listp face-or-list))
    (ps-face-attributes face-or-list))
   ;; only foreground color, not a `real' face
   ((eq (car face-or-list) 'foreground-color)
    (vector 0 (cdr face-or-list) nil))
   ;; only background color, not a `real' face
   ((eq (car face-or-list) 'background-color)
    (vector 0 nil (cdr face-or-list)))
   ;; list of faces
   (t
    (let ((effects 0)
          foreground background face-attr face)
      (while face-or-list
        (setq face         (car face-or-list)
              face-or-list (cdr face-or-list)
              face-attr    (ps-face-attributes face)
              effects      (logior effects (aref face-attr 0)))
        (or foreground (setq foreground (aref face-attr 1)))
        (or background
            (setq background (ps-face-background face (aref face-attr 2)))))
      (vector effects foreground background)))))


(defconst ps-font-type (vector nil 'bold 'italic 'bold-italic))


(defun ps-plot-with-face (from to face)
  (cond
   ((null face)                         ; print text with null face
    (ps-plot-region from to 0))
   ((eq face 'emacs--invisible--face))  ; skip invisible text!!!
   (t                                   ; otherwise, text has a valid face
    (let* ((face-bit   (ps-face-attribute-list face))
           (effect     (aref face-bit 0))
           (foreground (aref face-bit 1))
           (background (ps-face-background face (aref face-bit 2)))
           (fg-color (if (and ps-color-p foreground)
                         (ps-color-scale foreground)
                       ps-default-color))
           (bg-color (and ps-color-p background
                          (ps-color-scale background))))
      (ps-plot-region
       from to
       (ps-font-number 'ps-font-for-text
                       (or (aref ps-font-type (logand effect 3))
                           face))
       fg-color bg-color (lsh effect -2)))))
  (goto-char to))


;; Ensure that face-list is fbound.
(or (fboundp 'face-list) (defalias 'face-list 'list-faces))


(defun ps-build-reference-face-lists ()
  ;; Ensure that face database is updated with faces on
  ;; `font-lock-face-attributes' (obsolete stuff)
  (ps-font-lock-face-attributes)
  ;; Now, rebuild reference face lists
  (setq ps-print-face-alist nil)
  (if ps-auto-font-detect
      (mapcar 'ps-map-face (face-list))
    (mapcar 'ps-set-face-bold ps-bold-faces)
    (mapcar 'ps-set-face-italic ps-italic-faces)
    (mapcar 'ps-set-face-underline ps-underlined-faces))
  (setq ps-build-face-reference nil))


(defun ps-set-face-bold (face)
  (ps-set-face-attribute face 1))

(defun ps-set-face-italic (face)
  (ps-set-face-attribute face 2))

(defun ps-set-face-underline (face)
  (ps-set-face-attribute face 4))


(defun ps-set-face-attribute (face effect)
  (let ((face-bit (cdr (ps-map-face face))))
    (aset face-bit 0 (logior (aref face-bit 0) effect))))


(defun ps-map-face (face)
  (let* ((face-map (ps-screen-to-bit-face face))
         (ps-face-bit (cdr (assq (car face-map) ps-print-face-alist))))
    (if ps-face-bit
        ;; if face exists, merge both
        (let ((face-bit (cdr face-map)))
          (aset ps-face-bit 0 (logior (aref ps-face-bit 0) (aref face-bit 0)))
          (or (aref ps-face-bit 1) (aset ps-face-bit 1 (aref face-bit 1)))
          (or (aref ps-face-bit 2) (aset ps-face-bit 2 (aref face-bit 2))))
      ;; if face does not exist, insert it
      (setq ps-print-face-alist (cons face-map ps-print-face-alist)))
    face-map))


(defun ps-screen-to-bit-face (face)
  (cons face
        (vector (logior (if (ps-face-bold-p face) 1 0) ; bold
                        (if (ps-face-italic-p face) 2 0) ; italic
                        (if (ps-face-underlined-p face) 4 0)) ; underline
                (ps-face-foreground-name face)
                (ps-face-background-name face))))


;; to avoid compilation gripes
(defun ps-print-ensure-fontified (start end)
  (cond
   ((and (boundp 'jit-lock-mode) (symbol-value 'jit-lock-mode))
    (defalias 'ps-jitify 'jit-lock-fontify-now) ; avoid compilation gripes
    (ps-jitify start end))
   ((and (boundp 'lazy-lock-mode) (symbol-value 'lazy-lock-mode))
    (defalias 'ps-lazify 'lazy-lock-fontify-region) ; avoid compilation gripes
    (ps-lazify start end))))


(defun ps-generate-postscript-with-faces (from to)
  ;; Some initialization...
  (setq ps-current-effect 0)

  ;; Build the reference lists of faces if necessary.
  (when (or ps-always-build-face-reference
            ps-build-face-reference)
    (message "Collecting face information...")
    (ps-build-reference-face-lists))
  ;; Generate some PostScript.
  (save-restriction
    (narrow-to-region from to)
    (ps-print-ensure-fontified from to)
    (let ((face 'default)
          (position to))
      (cond
       ((memq ps-print-emacs-type '(xemacs lucid))
        ;; Build the list of extents...
        (let ((a (cons 'dummy nil))
              record type extent extent-list)
          (ps-x-map-extents 'ps-mapper nil from to a)
          (setq a (sort (cdr a) 'car-less-than-car)
                extent-list nil)

          ;; Loop through the extents...
          (while a
            (setq record (car a)

                  position (car record)
                  record (cdr record)

                  type (car record)
                  record (cdr record)

                  extent (car record))

            ;; Plot up to this record.
            ;; XEmacs 19.12: for some reason, we're getting into a
            ;; situation in which some of the records have
            ;; positions less than 'from'.  Since we've narrowed
            ;; the buffer, this'll generate errors.  This is a hack,
            ;; but don't call ps-plot-with-face unless from > point-min.
            (and (>= from (point-min))
                 (ps-plot-with-face from (min position (point-max)) face))

            (cond
             ((eq type 'push)
              (and (ps-x-extent-face extent)
                   (setq extent-list (sort (cons extent extent-list)
                                           'ps-extent-sorter))))

             ((eq type 'pull)
              (setq extent-list (sort (delq extent extent-list)
                                      'ps-extent-sorter))))

            (setq face (if extent-list
                           (ps-x-extent-face (car extent-list))
                         'default)
                  from position
                  a (cdr a)))))

       ((eq ps-print-emacs-type 'emacs)
        (let ((property-change from)
              (overlay-change from)
              (save-buffer-invisibility-spec buffer-invisibility-spec)
              (buffer-invisibility-spec nil))
          (while (< from to)
            (and (< property-change to) ; Don't search for property change
                                        ; unless previous search succeeded.
                 (setq property-change (next-property-change from nil to)))
            (and (< overlay-change to)  ; Don't search for overlay change
                                        ; unless previous search succeeded.
                 (setq overlay-change (min (next-overlay-change from) to)))
            (setq position (min property-change overlay-change))
            ;; The code below is not quite correct,
            ;; because a non-nil overlay invisible property
            ;; which is inactive according to the current value
            ;; of buffer-invisibility-spec nonetheless overrides
            ;; a face text property.
            (setq face
                  (cond ((let ((prop (get-text-property from 'invisible)))
                           ;; Decide whether this invisible property
                           ;; really makes the text invisible.
                           (if (eq save-buffer-invisibility-spec t)
                               (not (null prop))
                             (or (memq prop save-buffer-invisibility-spec)
                                 (assq prop save-buffer-invisibility-spec))))
                         'emacs--invisible--face)
                        ((get-text-property from 'face))
                        (t 'default)))
            (let ((overlays (overlays-at from))
                  (face-priority -1))   ; text-property
              (while (and overlays
                          (not (eq face 'emacs--invisible--face)))
                (let* ((overlay (car overlays))
                       (overlay-invisible (overlay-get overlay 'invisible))
                       (overlay-priority (or (overlay-get overlay 'priority)
                                             0)))
                  (and (> overlay-priority face-priority)
                       (setq face
                             (cond ((if (eq save-buffer-invisibility-spec t)
                                        (not (null overlay-invisible))
                                      (or (memq overlay-invisible
                                                save-buffer-invisibility-spec)
                                          (assq overlay-invisible
                                                save-buffer-invisibility-spec)))
                                    'emacs--invisible--face)
                                   ((overlay-get overlay 'face))
                                   (t face))
                             face-priority overlay-priority)))
                (setq overlays (cdr overlays))))
            ;; Plot up to this record.
            (ps-plot-with-face from position face)
            (setq from position)))))
      (ps-plot-with-face from to face))))

(defun ps-generate-postscript (from to)
  (ps-plot-region from to 0 nil))

(defun ps-generate (buffer from to genfunc)
  (save-excursion
    (let ((from (min to from))
          (to (max to from))
          ;; This avoids trouble if chars with read-only properties
          ;; are copied into ps-spool-buffer.
          (inhibit-read-only t))
      (save-restriction
        (narrow-to-region from to)
        (and ps-razzle-dazzle
             (message "Formatting...%3d%%" (setq ps-razchunk 0)))
        (setq ps-source-buffer buffer
              ps-spool-buffer (get-buffer-create ps-spool-buffer-name))
        (ps-init-output-queue)
        (let (safe-marker completed-safely needs-begin-file)
          (unwind-protect
              (progn
                (set-buffer ps-spool-buffer)
                (set-buffer-multibyte nil)

                ;; Get a marker and make it point to the current end of the
                ;; buffer,  If an error occurs, we'll delete everything from
                ;; the end of this marker onwards.
                (setq safe-marker (make-marker))
                (set-marker safe-marker (point-max))

                (goto-char (point-min))
                (or (looking-at (regexp-quote ps-adobe-tag))
                    (setq needs-begin-file t))

                (set-buffer ps-source-buffer)
                (save-excursion
                  (let ((ps-print-page-p t)
                        ps-even-or-odd-pages)
                    (ps-begin-job)
                    (when needs-begin-file
                      (ps-begin-file)
                      (ps-mule-initialize))
                    (ps-mule-begin-job from to)
                    (ps-selected-pages)))
                (ps-begin-page)
                (funcall genfunc from to)
                (ps-end-page)
                (ps-end-job needs-begin-file)

                ;; Setting this variable tells the unwind form that the
                ;; the PostScript was generated without error.
                (setq completed-safely t))

            ;; Unwind form: If some bad mojo occurred while generating
            ;; PostScript, delete all the PostScript that was generated.
            ;; This protects the previously spooled files from getting
            ;; corrupted.
            (and (markerp safe-marker) (not completed-safely)
                 (progn
                   (set-buffer ps-spool-buffer)
                   (delete-region (marker-position safe-marker) (point-max))))))

        (and ps-razzle-dazzle (message "Formatting...done"))))))


(defun ps-end-job (needs-begin-file)
  (let ((previous-print ps-print-page-p)
        (ps-print-page-p t))
    (ps-flush-output)
    (save-excursion
      (let ((pages-per-sheet (mod ps-page-printed ps-n-up-printing))
            (total-lines (cdr ps-printing-region))
            (total-pages (ps-page-number))
            case-fold-search)
        (set-buffer ps-spool-buffer)
        ;; Back to the PS output buffer to set the last page n-up printing
        (goto-char (point-max))
        (and (> pages-per-sheet 0)
             (re-search-backward "^[0-9]+ BeginSheet$" nil t)
             (replace-match (format "%d BeginSheet" pages-per-sheet) t))
        ;; Back to the PS output buffer to set the page count
        (goto-char (point-min))
        (and (re-search-forward "^/Lines 0 def\n/PageCount 0 def$" nil t)
             (replace-match (format "/Lines %d def\n/PageCount %d def"
                                    total-lines total-pages) t))))
    ;; Set dummy page
    (and ps-spool-duplex (= (mod ps-page-order 2) 1)
         (let ((ps-n-up-printing 0))
           (ps-header-sheet)
           (ps-output "/PrintHeader false def\n/ColumnIndex 0 def\n"
                      "/PrintLineNumber false def\nBeginPage\n")
           (ps-end-page)))
    ;; Set end of PostScript file
    (and previous-print
         (ps-output "EndSheet\n"))
    (ps-output "\n%%Trailer\n%%Pages: "
               (number-to-string
                (if (and needs-begin-file
                         ps-banner-page-when-duplexing)
                    (1+ ps-page-order)
                  ps-page-order))
               "\n\nEndDoc\n\n%%EOF\n")
    (ps-flush-output))
  ;; disable selected pages
  (setq ps-selected-pages nil))


;; Permit dynamic evaluation at print time of `ps-lpr-switches'.
(defun ps-do-despool (filename)
  (if (or (not (boundp 'ps-spool-buffer))
          (not (symbol-value 'ps-spool-buffer)))
      (message "No spooled PostScript to print")
    (if filename
        (save-excursion
          (and ps-razzle-dazzle (message "Saving..."))
          (set-buffer ps-spool-buffer)
          (setq filename (expand-file-name filename))
          (let ((coding-system-for-write 'raw-text-unix))
            (write-region (point-min) (point-max) filename))
          (and ps-razzle-dazzle (message "Wrote %s" filename)))
      ;; Else, spool to the printer
      (and ps-razzle-dazzle (message "Printing..."))
      (save-excursion
        (set-buffer ps-spool-buffer)
        (let* ((coding-system-for-write 'raw-text-unix)
               (ps-printer-name (or ps-printer-name
                                    (and (boundp 'printer-name)
                                         printer-name)))
               (ps-lpr-switches
                (append ps-lpr-switches
                        (and (stringp ps-printer-name)
                             (string< "" ps-printer-name)
                             (list (concat
                                    (and (stringp ps-printer-name-option)
                                         ps-printer-name-option)
                                    ps-printer-name))))))
          (apply (or ps-print-region-function 'call-process-region)
                 (point-min) (point-max) ps-lpr-command nil
                 (and (fboundp 'start-process) 0)
                 nil
                 (ps-flatten-list       ; dynamic evaluation
                  (mapcar 'ps-eval-switch ps-lpr-switches)))))
      (and ps-razzle-dazzle (message "Printing...done")))
    (kill-buffer ps-spool-buffer)))

;; Dynamic evaluation
(defun ps-eval-switch (arg)
  (cond ((stringp arg) arg)
        ((functionp arg) (apply arg nil))
        ((symbolp arg) (symbol-value arg))
        ((consp arg) (apply (car arg) (cdr arg)))
        (t nil)))

;; `ps-flatten-list' is defined here (copied from "message.el" and
;; enhanced to handle dotted pairs as well) until we can get some
;; sensible autoloads, or `flatten-list' gets put somewhere decent.

;; (ps-flatten-list '((a . b) c (d . e) (f g h) i . j))
;; => (a b c d e f g h i j)

(defun ps-flatten-list (&rest list)
  (ps-flatten-list-1 list))

(defun ps-flatten-list-1 (list)
  (cond ((null list) nil)
        ((consp list) (append (ps-flatten-list-1 (car list))
                              (ps-flatten-list-1 (cdr list))))
        (t (list list))))

(defun ps-kill-emacs-check ()
  (let (ps-buffer)
    (and (setq ps-buffer (get-buffer ps-spool-buffer-name))
         (buffer-modified-p ps-buffer)
         (y-or-n-p "Unprinted PostScript waiting; print now? ")
         (ps-despool))
    (and (setq ps-buffer (get-buffer ps-spool-buffer-name))
         (buffer-modified-p ps-buffer)
         (not (yes-or-no-p "Unprinted PostScript waiting; exit anyway? "))
         (error "Unprinted PostScript"))))

(cond ((fboundp 'add-hook)
       (funcall 'add-hook 'kill-emacs-hook 'ps-kill-emacs-check))
      (kill-emacs-hook
       (message "Won't override existing `kill-emacs-hook'"))
      (t
       (setq kill-emacs-hook 'ps-kill-emacs-check)))

\f
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Sample Setup Code:


;; This stuff is for anybody that's brave enough to look this far,
;; and able to figure out how to use it.  It isn't really part of
;; ps-print, but I'll leave it here in hopes it might be useful:

;; WARNING!!! The following code is *sample* code only.
;; Don't use it unless you understand what it does!

(defmacro ps-prsc ()
  `(if (eq ps-print-emacs-type 'emacs) [f22] 'f22))
(defmacro ps-c-prsc ()
  `(if (eq ps-print-emacs-type 'emacs) [C-f22] '(control f22)))
(defmacro ps-s-prsc ()
  `(if (eq ps-print-emacs-type 'emacs) [S-f22] '(shift f22)))

;; A hook to bind to `rmail-mode-hook' to locally bind prsc and set the
;; `ps-left-headers' specially for mail messages.
(defun ps-rmail-mode-hook ()
  (local-set-key (ps-prsc) 'ps-rmail-print-message-from-summary)
  (setq ps-header-lines 3
        ps-left-header
        ;; The left headers will display the message's subject, its
        ;; author, and the name of the folder it was in.
        '(ps-article-subject ps-article-author buffer-name)))

;; See `ps-gnus-print-article-from-summary'.  This function does the
;; same thing for rmail.
(defun ps-rmail-print-message-from-summary ()
  (interactive)
  (ps-print-message-from-summary 'rmail-summary-buffer "RMAIL"))

;; Used in `ps-rmail-print-article-from-summary',
;; `ps-gnus-print-article-from-summary' and `ps-vm-print-message-from-summary'.
(defun ps-print-message-from-summary (summary-buffer summary-default)
  (let ((ps-buf (or (and (boundp summary-buffer)
                         (symbol-value summary-buffer))
                    summary-default)))
    (and (get-buffer ps-buf)
         (save-excursion
           (set-buffer ps-buf)
           (ps-spool-buffer-with-faces)))))

;; Look in an article or mail message for the Subject: line.  To be
;; placed in `ps-left-headers'.
(defun ps-article-subject ()
  (save-excursion
    (goto-char (point-min))
    (if (re-search-forward "^Subject:[ \t]+\\(.*\\)$" nil t)
        (buffer-substring (match-beginning 1) (match-end 1))
      "Subject ???")))

;; Look in an article or mail message for the From: line.  Sorta-kinda
;; understands RFC-822 addresses and can pull the real name out where
;; it's provided.  To be placed in `ps-left-headers'.
(defun ps-article-author ()
  (save-excursion
    (goto-char (point-min))
    (if (re-search-forward "^From:[ \t]+\\(.*\\)$" nil t)
        (let ((fromstring (buffer-substring (match-beginning 1) (match-end 1))))
          (cond

           ;; Try first to match addresses that look like
           ;; thompson@wg2.waii.com (Jim Thompson)
           ((string-match ".*[ \t]+(\\(.*\\))" fromstring)
            (substring fromstring (match-beginning 1) (match-end 1)))

           ;; Next try to match addresses that look like
           ;; Jim Thompson <thompson@wg2.waii.com> or
           ;; "Jim Thompson" <thompson@wg2.waii.com>
           ((string-match "\\(\"?\\)\\(.*\\)\\1[ \t]+<.*>" fromstring)
            (substring fromstring (match-beginning 2) (match-end 2)))

           ;; Couldn't find a real name -- show the address instead.
           (t fromstring)))
      "From ???")))

;; A hook to bind to `gnus-article-prepare-hook'.  This will set the
;; `ps-left-headers' specially for gnus articles.  Unfortunately,
;; `gnus-article-mode-hook' is called only once, the first time the *Article*
;; buffer enters that mode, so it would only work for the first time
;; we ran gnus.  The second time, this hook wouldn't get set up.  The
;; only alternative is `gnus-article-prepare-hook'.
(defun ps-gnus-article-prepare-hook ()
  (setq ps-header-lines 3
        ps-left-header
        ;; The left headers will display the article's subject, its
        ;; author, and the newsgroup it was in.
        '(ps-article-subject ps-article-author gnus-newsgroup-name)))

;; A hook to bind to `vm-mode-hook' to locally bind prsc and set the
;; `ps-left-headers' specially for mail messages.
(defun ps-vm-mode-hook ()
  (local-set-key (ps-prsc) 'ps-vm-print-message-from-summary)
  (setq ps-header-lines 3
        ps-left-header
        ;; The left headers will display the message's subject, its
        ;; author, and the name of the folder it was in.
        '(ps-article-subject ps-article-author buffer-name)))

;; Every now and then I forget to switch from the *Summary* buffer to
;; the *Article* before hitting prsc, and a nicely formatted list of
;; article subjects shows up at the printer.  This function, bound to
;; prsc for the gnus *Summary* buffer means I don't have to switch
;; buffers first.
;; sb:  Updated for Gnus 5.
(defun ps-gnus-print-article-from-summary ()
  (interactive)
  (ps-print-message-from-summary 'gnus-article-buffer "*Article*"))

;; See `ps-gnus-print-article-from-summary'.  This function does the
;; same thing for vm.
(defun ps-vm-print-message-from-summary ()
  (interactive)
  (ps-print-message-from-summary 'vm-mail-buffer ""))

;; A hook to bind to bind to `gnus-summary-setup-buffer' to locally bind
;; prsc.
(defun ps-gnus-summary-setup ()
  (local-set-key (ps-prsc) 'ps-gnus-print-article-from-summary))

;; Look in an article or mail message for the Subject: line.  To be
;; placed in `ps-left-headers'.
(defun ps-info-file ()
  (save-excursion
    (goto-char (point-min))
    (if (re-search-forward "File:[ \t]+\\([^, \t\n]*\\)" nil t)
        (buffer-substring (match-beginning 1) (match-end 1))
      "File ???")))

;; Look in an article or mail message for the Subject: line.  To be
;; placed in `ps-left-headers'.
(defun ps-info-node ()
  (save-excursion
    (goto-char (point-min))
    (if (re-search-forward "Node:[ \t]+\\([^,\t\n]*\\)" nil t)
        (buffer-substring (match-beginning 1) (match-end 1))
      "Node ???")))

(defun ps-info-mode-hook ()
  (setq ps-left-header
        ;; The left headers will display the node name and file name.
        '(ps-info-node ps-info-file)))

;; WARNING! The following function is a *sample* only, and is *not*
;; meant to be used as a whole unless you understand what the effects
;; will be!  (In fact, this is a copy of Jim's setup for ps-print --
;; I'd be very surprised if it was useful to *anybody*, without
;; modification.)

(defun ps-jts-ps-setup ()
  (global-set-key (ps-prsc) 'ps-spool-buffer-with-faces) ;f22 is prsc
  (global-set-key (ps-s-prsc) 'ps-spool-region-with-faces)
  (global-set-key (ps-c-prsc) 'ps-despool)
  (add-hook 'gnus-article-prepare-hook 'ps-gnus-article-prepare-hook)
  (add-hook 'gnus-summary-mode-hook 'ps-gnus-summary-setup)
  (add-hook 'vm-mode-hook 'ps-vm-mode-hook)
  (add-hook 'vm-mode-hooks 'ps-vm-mode-hook)
  (add-hook 'Info-mode-hook 'ps-info-mode-hook)
  (setq ps-spool-duplex t
        ps-print-color-p nil
        ps-lpr-command "lpr"
        ps-lpr-switches '("-Jjct,duplex_long"))
  'ps-jts-ps-setup)

;; WARNING! The following function is a *sample* only, and is *not*
;; meant to be used as a whole unless it corresponds to your needs.
;; (In fact, this is a copy of Jack's setup for ps-print --
;; I would not be that surprised if it was useful to *anybody*,
;; without modification.)

(defun ps-jack-setup ()
  (setq ps-print-color-p  nil
        ps-lpr-command    "lpr"
        ps-lpr-switches   nil

        ps-paper-type        'a4
        ps-landscape-mode    t
        ps-number-of-columns 2

        ps-left-margin   (/ (* 72  1.0) 2.54) ;  1.0 cm
        ps-right-margin  (/ (* 72  1.0) 2.54) ;  1.0 cm
        ps-inter-column  (/ (* 72  1.0) 2.54) ;  1.0 cm
        ps-bottom-margin (/ (* 72  1.5) 2.54) ;  1.5 cm
        ps-top-margin    (/ (* 72  1.5) 2.54) ;  1.5 cm
        ps-header-offset (/ (* 72  1.0) 2.54) ;  1.0 cm
        ps-header-line-pad    .15
        ps-print-header       t
        ps-print-header-frame t
        ps-header-lines       2
        ps-show-n-of-n        t
        ps-spool-duplex       nil

        ps-font-family             'Courier
        ps-font-size               5.5
        ps-header-font-family      'Helvetica
        ps-header-font-size        6
        ps-header-title-font-size  8)
  'ps-jack-setup)

\f
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; To make this file smaller, some commands go in a separate file.
;; But autoload them here to make the separation invisible.

(autoload 'ps-mule-prepare-ascii-font "ps-mule"
  "Setup special ASCII font for STRING.
STRING should contain only ASCII characters.")

(autoload 'ps-mule-set-ascii-font     "ps-mule"
  "Adjust current font if current charset is not ASCII.")

(autoload 'ps-mule-plot-string        "ps-mule"
  "Generate PostScript code for ploting characters in the region FROM and TO.

It is assumed that all characters in this region belong to the same charset.

Optional argument BG-COLOR specifies background color.

Returns the value:

        (ENDPOS . RUN-WIDTH)

Where ENDPOS is the end position of the sequence and RUN-WIDTH is the width of
the sequence.")

(autoload 'ps-mule-initialize         "ps-mule"
  "Initialize global data for printing multi-byte characters.")

(autoload 'ps-mule-begin-job          "ps-mule"
  "Start printing job for multi-byte chars between FROM and TO.
This checks if all multi-byte characters in the region are printable or not.")

(autoload 'ps-mule-begin-page         "ps-mule"
  "Initialize multi-byte charset for printing current page.")

\f
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

(provide 'ps-print)

;;; ps-print.el ends here