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% Copyright (C) 2001-2023 Artifex Software, Inc.
% All Rights Reserved.
%
% This software is provided AS-IS with no warranty, either express or
% implied.
%
% This software is distributed under license and may not be copied,
% modified or distributed except as expressly authorized under the terms
% of the license contained in the file LICENSE in this distribution.
%
% Refer to licensing information at http://www.artifex.com or contact
% Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
% CA 94129, USA, for further information.
%
% 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 will line-wrap when using fixed-pitch fonts.
% It will also do kerning and width adjustment.
% Standard switches implemented:
% -12BclqRr -b<header> -f<font> -F<hfont> -L<lines> -p<outfile>
% Sun switches implemented:
% -T<n> set tab width
% Switches ignored:
% -GghKkmow -# -C -d -J -n -P -S -s -t -v
% Switches added:
% --add-to-space <units>
% add the given number of 1/72" units to the width of each
% space (may be negative)
% --add-to-width <units>
% add the given number of 1/72" units to the width of each
% character (may be negative)
% --columns <n>
% print in <n> columns
% --detect
% treat the file as PostScript if it starts with %!
% --first-page <n>
% --duplex(|-long-edge|-short-edge)
% use duplex if available; if not specified, select long edge
% for portrait printing, short edge for landscape
% start printing at page <n>
% --encoding <encodingname> default ISOLatin1Encoding
% Note this only takes effect during -f or -F option thus the
% body text and header text can use different encodings.
% --kern <file.afm>
% kern using information from the given .AFM file
% --last-page <n>
% stop printing after page <n>
% --(heading|footing)-(left|center|right) <string>
% set the heading/footing fields; use -B first to clear
% --margin-(top|bottom|left|right) <inches>
% set a margin
% --no-eject-(file|formfeed)
% end-of-file/FF only starts a new column, not a new sheet
% --spacing <n>
% use 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
/encoding /ISOLatin1Encoding def % the default encoding
% build a version of the font with the requested encoding (default ISOLatin1)
/font-to-encoding { % <font> font-to-encoding <font>
%% reencode for iso latin1; from the 2nd edition red book, sec 5.6.1
dup length dict begin {1 index /FID ne {def} {pop pop} ifelse} forall
/Encoding encoding /Encoding findresource readonly def
currentdict end
% strip off the "Encoding" part of the encoding (if present)
dup /FontName get 80 string cvs
encoding 256 string cvs (Encoding) search {
exch pop exch pop
} if
exch (-) concatstrings exch
concatstrings cvn
exch definefont
} def
/find-latin-font { % <name> find-latin-font <font>
findfont font-to-encoding
} def
% Define the initial values of the printing parameters.
/AddToSpace 0 def
/AddToWidth 0 def
/BodyFont null def % use default
/defaultBodyFontPortrait
/Courier find-latin-font 10 scalefont def
/defaultBodyFontLandscape
/Courier find-latin-font 7 scalefont def
/defaultBodyFont
{ Landscape { defaultBodyFontLandscape } { defaultBodyFontPortrait } ifelse } def
/Columns 1 def
/DetectFileType false def
/Duplex null def
/EjectEOF true def
/EjectFF true 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 find-latin-font 10 scalefont def
/Kern 0 dict def % no kerning
/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.
/lpdef { % <name> <value> lpdef -
/def 2 true lpexec
} def
/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 -1 roll dup wo
n 1 sub { n -1 roll dup wosp } repeat
(\n) ws n t
} ifelse
{ pop load exec }
{ { pop } repeat }
ifelse
} def
/lpmoveto { % <x> <y> lpmoveto -
% Round the coordinates for smaller output.
2 {
exch 100 mul round 100 div
dup dup cvi eq { cvi } if
} repeat
1 index X eq { neg exch pop /V 1 } { neg /M 2 } ifelse true lpexec
} def
/lpshow { % <string> lpshow -
dup length 0 ne {
addspace 0 ne {
addspace 0 32
addwidth 0 ne {
addwidth 0 6 -1 roll /awidthshow 6 true lpexec
} {
4 -1 roll /widthshow 4 true lpexec
} ifelse
} {
addwidth 0 ne {
addwidth 0 3 -1 roll /ashow 3 true lpexec
} {
OutFile null ne {
dup dup length =string length gt {
/show 1 false lpexec
} {
(S ) ws ws (\n) ws
} ifelse
} if show
} ifelse
} ifelse
} {
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
/addspace 0 def /addwidth 0 def
/pairkern 0 dict def
3 -1 roll bannerstring pop 0 4 index pwidth showline2 pop
exch bannerstring pwidth exch sub 2 div 3 index pwidth showline2 pop
bannerstring
% Prevent the last character of the heading from grazing
% the right margin.
% ****** WHY DOES IT REQUIRE SO MUCH PADDING? ******
( ) stringwidth pop 2 mul add
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
pagex pagey Landscape {/BL} {/B} ifelse 2 true lpexec
/pagesave exch def
skipping { nulldevice /OutFile null def } if
Headers
{ lheight hdescent add
HeadingLeft HeadingCenter HeadingRight banner
} if
/BFont lpsetmyfont
/pairkern Kern def
/addspace AddToSpace def /addwidth AddToWidth def
pairkern length 0 ne {
/addspace AddToSpace lpdef /addwidth AddToWidth lpdef
} if
} def
/endpage {
lindex 0 ne {
Footers {
topskip plength sub hdescent add
FootingLeft FootingCenter FootingRight banner
} if
/E
} {
/restore
} ifelse
pagesave exch 0 true lpexec
/pindex pindex 1 add def
} def
/endcolumn
{ lindex colines 1 sub add colines idiv colines mul
dup llength ge { pop endpage beginpage } { /lindex exch def } ifelse
} 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
/wdict {
dup length wosp ( dict\n) ws
{ (dup) ws exch wosp wosp ( put\n) ws } forall
} def
/wosp { ( ) ws wo } def
/wo {
dup type /dicttype eq { wdict } { OutFile exch write==only } ifelse
} def
/ws {
OutFile exch writestring
} def
/outfont { % <name> <font> outfont -
OutFile null ne {
exch wo
dup /FontName get
dup wosp (-ISOLatin1) ws wosp ( RE) ws
/FontMatrix get 0 get 1000 mul round cvi wosp
( scalefont def\n) ws
} {
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 {
Truncate { pop () } if
exit
} if
EjectFF { endpage beginpage } { endcolumn } ifelse
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
/setxy {
/ty exch def /tx exch def
} def
/showline2 { % string x y xlimit -> leftover_string (handles tabs)
2 index exch 5 2 roll setxy {
% Stack: xinit xlimit string
showline3 dup length 0 eq { exit } if
dup 0 get CharTAB ne { exit } if
tx 3 index sub tabwx div
0.05 add ceiling tabwx mul 3 index add ty setxy
skip1
tx 2 index ge { exit } if
} loop exch pop exch pop
} def
/showline3 { % xlimit string -> xlimit leftover_string
% (finds line break / tab / formfeed)
1 index tx 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 length 0 ne {
tx ty lpmoveto
dup pairkern length 0 eq {
lpshow
} {
{ kproc } exch /kshow 2 true lpexec
} ifelse
currentpoint setxy
} if
length dup 2 index length exch sub getinterval
} def
/kproc { % <char1> <char2> kproc -
pairkern currentfont /Encoding get 3 index get
2 copy known {
get currentfont /Encoding get 2 index get
2 copy known {
get currentfont /FontMatrix get 0 get mul
} {
pop pop 0
} ifelse
} {
pop pop 0
} ifelse
addwidth add 2 index 32 eq { addspace add } if
dup 0 eq { pop } { 0 rmoveto } ifelse
pop pop
} def
/skip1
{ dup length 1 sub 1 exch getinterval
} def
/e== { % <object> e== - -- print an object to stderr
(%stderr) (w) file dup 3 -1 roll write==only flushfile
} def
/eprint { % <string> eprint - -- print a string to stderr
(%stderr) (w) file dup 3 -1 roll writestring flushfile
} def
% Read kerning information from a .AFM file.
/readkern { % <afmfile> readkern <pairkerndict>
/mfilename 1 index def
(r) file /mfile exch def
mfile =string readline pop
(StartFontMetrics ) anchorsearch {
pop pop
/kdict 256 dict def
{ mfile =string readline pop
(EndFontMetrics) anchorsearch { pop pop exit } if
(KPX ) anchorsearch {
pop token pop cvlit /char1 exch def
token pop cvlit /char2 exch def
token pop /kern exch def pop
kdict char1 .knownget not {
5 dict kdict char1 2 index .growput
} if
char2 kern .growput
} {
pop
} ifelse
} loop kdict
} {
pop
mfilename eprint ( does not begin with StartFontMetrics.\n) eprint
0 dict
} ifelse
mfile closefile
} def
% The main printing procedure
/doFirst true def
/prevBFont null def
/prevHFont null def
/lpfirst { % - lpfirst -
% If writing to file we need to emit the definition of 'encoding' or it will
% produce non-working PostScript. If we are executing directly then encoding is
% already defined. This defines encoding as an array instead of a name, but it will work OK
% and avoids changing the /RE procedure.
OutFile null eq not {
OutFile (/encoding /) writestring
OutFile encoding 256 string cvs writestring
OutFile ( /Encoding findresource def\n) writestring
} if
% Define some abbreviating procedures.
/B {save 3 1 roll translate /X 0 def} lpdef
/BL {save 3 1 roll 90 rotate translate /X 0 def} lpdef
/P {/setpagedevice where {pop % <key> <value> P
5 dict begin 2 copy def
/Policies 2 dict dup 4 index 1 put def currentdict end setpagedevice
} {pop pop} ifelse} lpdef
/E {showpage restore} lpdef
/V {neg X exch moveto} lpdef
/M {/X 2 index def neg moveto} lpdef
/S {currentfile =string readline pop show} lpdef
/RE { % <isoname> <fontname> RE <font>
findfont
%% reencode for current 'encoding' from the 2nd edition red book, sec 5.6.1
dup length dict begin {1 index /FID ne {def} {pop pop} ifelse} forall
/Encoding encoding def currentdict end
definefont
} lpdef
} def
/lp { % file initial_chars ->
/lpline exch def
/lpfile exch def
doFirst { lpfirst /doFirst false def } if
% Initialize the device and fonts.
/BFont
BodyFont null eq { defaultBodyFont } { BodyFont } ifelse def
BFont prevBFont ne {
/BFont BFont outfont
/prevBFont BFont def
} if
Headers Footers or {
/HFont
HeadingFont null eq { defaultHeadingFont } { HeadingFont } ifelse def
HFont prevHFont ne {
/HFont HFont outfont
/prevHFont HFont def
} if
} if
save
% Get the layout parameters.
clippath
gsave % for possible rotation
Landscape { 90 rotate } 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
/pagey exch def /pagex exch def
plength pskip sub lheight div cvi MaxLines .min
dup /colines exch def
Columns mul /llength exch def
grestore
OutFile null ne { nulldevice } if
% Print layout
Noisy
{ (Page height = ) eprint llength e==
(.\n) eprint flush
} if
colines 1 lt cowidth 1 lt or
{
(Page too small, it must be large to hold at least one line of text\n) eprint
(please specify a page size using for example -sPAPERSIZE=(a4|letter)\n) eprint
/gslp.ps cvx /limitcheck signalerror
} if
% Set duplex if requested.
Duplex null ne {
/Duplex true /P 2 false lpexec
/Tumble Duplex /P 2 false lpexec
} if
% Write the kerning table, if relevant.
OutFile null ne Kern length 0 ne and {
(/kproc) ws /kproc load wosp ( def\n) ws
(/pairkern) ws Kern wosp ( def\n) ws
} if
% Disable stack recording so we can use stopped with readline.
$error /recordstacks false put
% Initialize for the first page.
/lbuf 64000 string def
/pindex 1 def
beginpage
% Iterate through the file.
lpline
% First handle new-lines in the initial string (--detect mode)
(\n) search {
showline % output up to the first new-line
pop pop % done with that string and the new-line
(\n) search {
showline % output the second new-line
pop pop % done
} if
} if
{ dup length /pos exch def
lbuf exch 0 exch putinterval
{ lpfile lbuf pos lbuf length pos sub getinterval readline } stopped
{ % Filled the line before a CR or EOF.
exch pop showline
}
{ % Reached CR and/or EOF first.
exch length pos add lbuf exch 0 exch getinterval
1 index { showline } if % omit final empty line
{ dup length 0 eq { pop () exit } if
showline
} loop
exch not { exit } if
} ifelse
pindex PageLast gt { exit } if
} loop
pop
% Wrap up.
%**************** WHY IS THIS COMMENTED OUT? ****************
% EjectEOF { endpage } { endcolumn } ifelse
endpage
restore
} def
end
% Usage: <file> lp
% prints <file> using the current parameter settings.
% Usage: [ <arg1> ... <argn> ] lpcommand
% interprets args like a command line.
/lp { save lpdict begin () lp end restore } def
lpdict begin
/splitfn % (FontNN.NN) -> <font>
{ dup /arg exch def length
{ dup 0 le { exit } if
dup 1 sub arg exch get dup 48 ge 1 index 59 le and exch 46 eq or not { exit } if
1 sub
} loop
arg exch 0 exch getinterval dup cvn find-latin-font
exch arg exch anchorsearch pop pop cvr scalefont
} def
% Parse the command line switches.
/doswitch % argn ... arg1 (-?) restofswitch ->
{ exch dup cvn lpdict exch known
{ cvn load exec }
{ exch pop (Unknown switch: ) eprint eprint (\n) eprint }
ifelse
} def
/more % argn ... arg1 restofswitch ->
{ dup length 0 ne
{ (- ) dup 1 3 index 0 get put
exch dup length 1 sub 1 exch getinterval
doswitch
}
{ pop
}
ifelse
} def
/-- { (--) exch concatstrings
dup cvn lpdict exch known
{ cvn load exec }
{ (Unknown switch: ) eprint eprint (\n) eprint }
ifelse
} def
/--add-to-space { cvr /AddToSpace exch def } def
/--add-to-width { cvr /AddToWidth exch def } def
/--columns { cvi 1 .max /Columns exch def } def
/--detect { /DetectFileType true def } def
/--duplex { /Duplex {Landscape} def } def
/--duplex-long-edge { /Duplex false def } def
/--duplex-short-edge { /Duplex true def } def
/--encoding {
cvn /encoding exch def
%% If we changed the encoding, then we need to remake the default fonts with the correct encoding
/defaultBodyFontPortrait
/Courier find-latin-font 10 scalefont def
/defaultBodyFontLandscape
/Courier find-latin-font 7 scalefont def
/defaultBodyFont
{ Landscape { defaultBodyFontLandscape } { defaultBodyFontPortrait } ifelse } def
} def
/--first-page { cvi /PageFirst exch def } def
/--footing-center { /FootingCenter exch def /Footers true def } def
/--footing-left { /FootingLeft exch def /Footers true def } def
/--footing-right { /FootingRight exch def /Footers true def} def
/--heading-center { /HeadingCenter exch def /Headers true def } def
/--heading-left { /HeadingLeft exch def /Headers true def } def
/--heading-right { /HeadingRight exch def /Headers true def } def
/--kern { readkern /Kern exch def } def
/--last-page { cvi /PageLast exch def } def
/--margin-bottom { cvr 72.0 mul /MarginBottom exch def } def
/--margin-left { cvr 72.0 mul /MarginLeft exch def } def
/--margin-right { cvr 72.0 mul /MarginRight exch def } def
/--margin-top { cvr 72.0 mul /MarginTop exch def } def
/--no-eject-file { /EjectEOF false def } def
/--no-eject-formfeed { /EjectFF false def } def
/--spacing { cvr /Spacing exch def } def
/-# { pop } def % ignore
/-+ { -- } def
(-1)cvn { /Columns 1 def more } def
(-2)cvn { /Columns 2 def more } def
/-b { /HeadingLeft exch def /HeadingCenter () def /HeadingRight PageNumberString def
/Headers true def
/break true def
} def
/-B { /HeadingLeft () def /HeadingCenter () def /HeadingRight () def
/Headers false def
/FootingLeft () def /FootingCenter () def /FootingRight () def
/Footers false def
/break true def
more
} def
/-C { pop } def % ignore
/-c { /Truncate true def more } def
/-d { pop } def % ignore
/-f { splitfn /BodyFont exch def } def
/-F { splitfn /HeadingFont exch def } def
/-G { more } def % ignore
/-g { more } def % ignore
/-h { more } def % ignore
/-J { pop } def % ignore
/-K { more } def % ignore
/-k { more } def % ignore
/-l { 66 -L -B } def
/-L { cvi /MaxLines exch def } def
/-m { more } def % ignore
/-n { pop } def % ignore
/-o { more } def % ignore
/-p { (w) file /OutFile exch def OutFile (%!\n) writestring } def
/-P { pop } def % ignore
/-q { /Noisy false def more } def
/-r { /Landscape true def more } def
/-R { /Landscape false def more } def
/-S { pop } def % ignore
/-s { pop } def % ignore
/-T { cvi /Tab exch def } def
/-v { pop } def % ignore
/-w { more } def % ignore
/lp1 % filename ->
{ break not { dup /HeadingLeft exch def } if
Noisy
{ (Printing ) eprint dup eprint (\n) eprint
} if
(r) file
% If requested, check for a PostScript file.
DetectFileType
{ dup 2 string readstring pop dup (%!) eq
{ % Yes, it's a PostScript file.
pop dup 80 string readline pop pop cvx exec
}
{ lp
}
ifelse
}
{ () lp
}
ifelse
} bind def
/lpcstring 8192 string def
end
/lpcommand % <[arg1 ... argn]> lpcommand <any_printed>
{ % Push the commands on the stack in reverse order
mark exch
dup length 1 sub -1 0 { 1 index exch get exch } for pop
lpdict begin
/any false def
/break false def
{ dup mark eq { pop exit } if
dup length 2 ge { dup 0 get (-) 0 get eq } { false } ifelse
{ dup 0 2 getinterval
exch dup length 2 sub 2 exch getinterval
doswitch
}
{ dup /matched false def
{ /matched true def /any true def lp1 } lpcstring filenameforall
matched { pop } { lp1 } ifelse % let the error happen
}
ifelse
} loop
OutFile null ne
{ OutFile (%stdout) (w) file ne { OutFile closefile } if
/OutFile null def
} if
any
end
} def
[ .shellarguments
{ ] dup length 0 ne { lpcommand } { false } ifelse not
{ (%stderr) (w) file
[ (Usage: )
/PROGNAME where { pop PROGNAME } { (gslp) } ifelse
( [-12BclqRr] [-b<header>] [-f<font>] [-F<hfont>]\n)
( [-L<lines>] [-p<outfile>] [-T<tabwidth>]\n)
( [--add-to-(space|width) <units>] [--columns <n>]\n)
( [--detect] [--first-page <page#>] [--last-page <page#>]\n)
( [--(heading|footing)-(left|right|center) <string>]\n)
( [--kern <afmfile>] [--margin-(top|bottom|left|right) <inches>]\n)
( [--no-eject-(file|formfeed)] [--spacing <n>] file1 ... filen\n)
] { 2 copy writestring pop } forall dup flushfile closefile
}
if
}
{ pop }
ifelse