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gslp.ps
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1994-07-11
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% Copyright (C) 1991, 1993 Aladdin Enterprises. All rights reserved.
%
% This file is part of Ghostscript.
%
% Ghostscript is distributed in the hope that it will be useful, but
% WITHOUT ANY WARRANTY. No author or distributor accepts responsibility
% to anyone for the consequences of using it or for whether it serves any
% particular purpose or works at all, unless he says so in writing. Refer
% to the Ghostscript General Public License for full details.
%
% Everyone is granted permission to copy, modify and redistribute
% Ghostscript, but only under the conditions described in the Ghostscript
% General Public License. A copy of this license is supposed to have been
% given to you along with Ghostscript so you can know your rights and
% responsibilities. It should be in a file named COPYING. Among other
% things, the copyright notice and this notice must be preserved on all
% copies.
% gslp.ps - format and print text
% This utility provides functionality approximately equivalent to the Unix
% `enscript' program. It prints plain text files using a single font.
% It currently handles tabs and formfeeds, but not backspaces.
% It only works with fixed-pitch fonts.
% Standard flags implemented:
% -12BclqRr -b -f -F -L -p
% Sun flags implemented:
% -T<n> set tab width
% Flags ignored:
% -GghKkmow -# -C -d -J -n -P -S -s -t -v
% Flags added:
% --detect
% treats the file as PostScript if it starts with %!
% --(heading|footing)-(left|center|right) <string>
% sets the heading/footing fields; use -B first to clear
% --first-page <n>
% sets the first page to print
% --last-page <n>
% sets the last page to print
% --spacing <n>
% for double (n=2), triple (n=3), etc. spacing
% Also, the string %# in a heading or footing is replaced with the page #.
/PageNumberString (%#) def
/lpdict 150 dict def
lpdict begin
% Define the initial values of the printing parameters.
/BodyFont null def % use default
/defaultBodyFont
{ /Courier findfont Landscape { 7 } { 10 } ifelse scalefont } def
/Columns 1 def
/DetectFileType false def
/Footers false def
/FootingLeft () def
/FootingCenter () def
/FootingRight () def
/Headers true def
/HeadingLeft () def
/HeadingCenter () def
/HeadingRight (page ) PageNumberString concatstrings def
/HeadingFont null def % use default
/defaultHeadingFont
{ /Courier-Bold findfont 10 scalefont } def
/Landscape false def
/MarginBottom 36 def % 1/2"
/MarginLeft 36 def % 1/2"
/MarginRight 36 def % 1/2"
/MarginTop 36 def % 1/2"
/MaxLines 9999 def % max lines per page
/Noisy true def % i.e., not quiet
/OutFile null def % null = write directly to device
/PageFirst 1 def
/PageLast 99999 def
/Spacing 1 def
/Tab 8 def
/Truncate false def % wrap long lines, don't truncate
% When writing to a file, we want to write out PostScript;
% when writing to the printer, we want to execute it;
% some commands should be executed regardless.
% lpexec provides for all this.
/lpexec % <arg1> ... <argn> </op> <n> <do_always> lpexec -
{ OutFile null eq
{ pop 1 add true
}
{ /t exch def 1 add /n exch def cvx
n { n -1 roll dup wosp } repeat
OutFile (\n) writestring
n t
}
ifelse
{ pop load exec }
{ { pop } repeat }
ifelse
} def
/lpmoveto
{ /moveto 2 true lpexec
} def
/lpshow
{ dup length 0 ne { /show 1 false lpexec } { pop } ifelse
} def
/lpsetmyfont
{ dup load setfont
OutFile null ne { cvx /setfont 1 false lpexec } { pop } ifelse
} def
% Define some utility procedures.
/banner % ypos left center right
{ /HFont lpsetmyfont
3 -1 roll bannerstring pop 0 4 index pwidth showline2 pop
exch bannerstring pwidth exch sub 2 div 3 index pwidth showline2 pop
bannerstring pwidth exch sub
3 -1 roll pwidth showline2 pop
} def
/bannerstring % string -> string width
{ PageNumberString search
{ exch pop pindex 4 string cvs concatstrings exch concatstrings
}
if dup stringwidth pop
} def
/beginpage
{ /lindex 0 def
/skipping pindex PageFirst ge pindex PageLast le and not def
/save 0 true lpexec /pagesave exch def
skipping { nulldevice /OutFile null def } if
Headers
{ lheight hdescent add
HeadingLeft HeadingCenter HeadingRight banner
} if
/BFont lpsetmyfont
} def
/endpage
{ lindex 0 ne
{ Footers
{ topskip plength sub hdescent add
FootingLeft FootingCenter FootingRight banner
} if
/showpage 0 false lpexec
} if
pagesave /restore 0 true lpexec
/pindex pindex 1 add def
} def
/fontheight % <font> fontheight <ascent> <height>
{ gsave setfont
newpath 0 0 moveto
(|^_j) false charpath
pathbbox exch pop dup 2 index sub 4 -2 roll pop pop
grestore exch 1.25 mul exch 1.25 mul
} def
/wosp
{ OutFile ( ) writestring OutFile exch write==only
} def
/outfont % name font ->
{ OutFile null ne
{ exch wosp
dup /FontName get wosp OutFile ( findfont) writestring
/FontMatrix get 0 get 1000 mul round cvi wosp
OutFile ( scalefont def\n) writestring
}
{ pop pop
}
ifelse
} def
/StringFF (\f) def
/CharFF StringFF 0 get def
/StringTAB (\t) def
/CharTAB StringTAB 0 get def
/showline % line -> leftover_line (handles \f)
{ { showline1 dup length 0 eq { exit } if
dup 0 get CharFF ne { exit } if
endpage beginpage
skip1
}
loop
} def
/showline1 % line -> leftover_line (handles page break)
{ lindex llength eq { endpage beginpage } if
lindex colines idiv cowidth mul % x
lindex colines mod 1 add lheight mul neg fascent sub % y
1 index cowidth add
showline2
/lindex lindex 1 add def
} def
/showline2 % string x y xlimit -> leftover_string (handles tabs)
{ 2 index exch 5 2 roll lpmoveto % xinit xlimit string
{ showline3 dup length 0 eq { exit } if
dup 0 get CharTAB ne { exit } if
currentpoint exch 4 index sub tabwx div
0.05 add ceiling tabwx mul 4 index add exch lpmoveto
skip1
currentpoint pop 2 index ge { exit } if
}
loop exch pop exch pop
} def
/showline3 % xlimit string -> xlimit leftover_string
% (finds line break / tab / formfeed)
{ currentpoint pop 2 index exch sub
cwx div 0.1 add cvi 0 max 1 index length min
1 index 0 3 -1 roll getinterval
% look for \f or \t
StringFF search { exch pop exch pop } if
StringTAB search { exch pop exch pop } if
dup lpshow
length dup 2 index length exch sub getinterval
} def
/skip1
{ dup length 1 sub 1 exch getinterval
} def
% The main printing procedure
/lp % file initial_chars ->
{ /lpline exch def
/lpfile exch def
/save 0 true lpexec
% Initialize the device and fonts.
/BFont
BodyFont null eq { defaultBodyFont } { BodyFont } ifelse def
/BFont BFont outfont
Headers Footers or
{ /HFont
HeadingFont null eq { defaultHeadingFont } { HeadingFont } ifelse def
/HFont HFont outfont
}
if
% Get the layout parameters.
clippath
Landscape { -90 /rotate 1 true lpexec } if
BFont setfont ( ) stringwidth pop /cwx exch def
cwx Tab mul /tabwx exch def
BFont fontheight /fheight exch def /fascent exch def
Headers Footers or { HFont fontheight } { 0 0 } ifelse
/hheight exch def /hascent exch def
/hdescent hheight hascent sub def
fheight Spacing mul /lheight exch def
Headers { hheight lheight add } { 0 } ifelse
/topskip exch def
Footers { hheight lheight add } { 0 } ifelse
/botskip exch def
/pskip topskip botskip add def
% Translate the page so that (0,0) corresponds to
% the top of the topmost body line.
pathbbox
2 index sub MarginBottom MarginTop add sub /plength exch def
2 index sub MarginLeft MarginRight add sub /pwidth exch def
pwidth Columns div /cowidth exch def
exch MarginLeft add
exch MarginBottom add plength add topskip sub
/translate 2 true lpexec
plength pskip sub lheight div cvi MaxLines min
dup /colines exch def
Columns mul /llength exch def
OutFile null ne { nulldevice } if
% Print layout
Noisy
{ (Page height = ) print llength =only
(.\n) print flush
} if
% Disable stack recording so we can use stopped with readline.
$error /recordstacks fal