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#!/usr/bin/perl
# $Id$
#
# File: ppd-doc-extractor
# Date: 27 Jan 2022 16:28:17
# Author: Alexander Zangerl <az@snafu.priv.at>
#
# Abstract:
# very minimal recreation of the PPD documentation extractor
# of foomatic-rip 3.x (which you got with foomatic-rip -o docs), which
# is not part of the rewritten 4.x versions despite the documentation's
# claims and the broken option code that doesn't reject what it cannot
# handle.
#
# copyright (c) 2022 Alexander Zangerl <az@snafu.priv.at>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2
# as published by the Free Software Foundation.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
use strict;
use File::Slurp;
use Data::Dumper;
my ($ppdfile,@a2ps) = @ARGV;
die "usage: $0 <ppdfile> [a2ps args]\n
no a2ps args: print to stdout
automatically added: --center-title, --footer\n\n" if (!-f $ppdfile);
my @stuff = read_file($ppdfile);
# parse everything but massage and handle just the relevant parts
my (%x, $curopengroup);
for (my $i = 0; $i <= $#stuff; ++$i)
{
my $line = $stuff[$i];
$line =~ s/\r\n$//; # de-dos
chomp $line;
my ($key, $value, $option, $xlatoption);
next if ($line =~ /^(\*%.*)?$/ or $line eq "*End");
if ($line =~ /^\*([^:]+):\s*(.+)\s*$/)
{
($key, $value) = ($1,$2);
if ($key =~ /^(\S+)\s+(.+)$/)
{
$key = $1;
$option = $2;
if ($option =~ m!^([^/]+)/(.+)$!)
{
($option,$xlatoption) = ($1,$2);
undef $xlatoption if ($xlatoption eq $option); # unnecessary ones
}
}
# invocationvalue and quotedvalue allow continuation
if ($value =~ /^"([^"]+)"\s*$/)
{
$value = $1;
}
elsif ($value =~ /^"([^"]*)*$/)
{
$value = $1;
while ((my $nextline = $stuff[++$i]) !~ /"/)
{
$value .= $nextline;
}
if ($stuff[$i] =~ /^([^"]+)"\s*$/)
{
$value .= $1;
}
}
# orderdependency is laid out extraspecially stupidly
if ($key =~ /^(NonUI)?OrderDependency$/)
{
$key = "OrderDependency"; # we lump these together
my ($num,$dontcare,$appliesto) = split(/\s+/,$value);
($option = $appliesto) =~ s/^\*//;
$value = $num;
}
# want the options under openui w/o fluff
elsif ($key eq "OpenUI")
{
$option =~ s/^\*//;
}
# another instance of shitty structural layout
elsif ($key eq "OpenGroup")
{
if ($value =~ m!^\s*(\S+)/(.+)$!)
{
($option,$xlatoption) = ($1,$2);
}
else
{
$xlatoption = $option = $value;
}
$curopengroup = $value = $option;
}
elsif ($key eq "CloseGroup")
{
undef $curopengroup;
}
if (defined $option)
{
# for option entries add a sequence number for sorting - simply use the line number
$x{$key}->{$option} = { xlat => $xlatoption,
value => $value,
sequence => $i,
ingroup => $curopengroup, };
}
else
{
$x{$key} = $value;
}
}
else
{
die "unrecognized line nr. $i\n";
}
}
# print Dumper(\%x);
if (@a2ps)
{
push @a2ps, ("--center-title=Documentation for $x{ModelName}","--footer=");
# lazy me: just duping the pipe fd...
open(P, "|-", "a2ps", @a2ps) or die "cannot pipe to a2ps: $!\n";
open(STDOUT, ">&", \*P) or die "cannot dup: $!\n";
}
print qq|
Invocation summary for $x{ModelName}:
Command line: lpr [-Z opt=value, opt=value...] [lpr options] <file>
List of available options:\n\n|;
# meh...orderdependency is not in all ppds or all sections :-(
my $odep = $x{OrderDependency};
my @onames = sort { $odep->{$a}->{ingroup} cmp $odep->{$a}->{ingroup}
|| $odep->{$a}->{sequence} <=> $odep->{$b}->{sequence}
|| $odep->{$a}->{value} <=> $odep->{$b}->{value}
|| $x{OpenUI}->{$a}->{sequence} <=> $x{OpenUI}->{$b}->{sequence} } keys %{$x{OpenUI}};
for my $oname (@onames)
{
my $label = $x{OpenUI}->{$oname}->{xlat} // $oname;
my $type = $x{OpenUI}->{$oname}->{value} // "Unknown";
# one choice is no choice
next if ($type eq "PickOne" && keys %{$x{$oname}} == 1);
my $this = $x{$oname};
my $example = (keys %$this)[0];
my $sectionname = $x{OpenGroup}->{$this->{$example}->{ingroup}}->{xlat};
my $sectionlabel = $sectionname ? " Section: $sectionname\n":"";
print "Option '$oname': $label\n$sectionlabel Type: $type\n Choices:\n";
for my $choice (sort { $this->{$a}->{sequence} <=> $this->{$b}->{sequence} } keys %$this)
{
my $choicelabel = $x{$oname}->{$choice}->{xlat};
print " o '$choice'".($choicelabel? ": $choicelabel":"")."\n";
}
print " Default: ".$x{"Default$oname"}."\n Example: -Z $oname=$example\n\n";
}
if (@a2ps)
{
close(STDOUT);
close(P);
}
|
