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https://gitlab.nic.cz/labs/bird.git
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9c7631235a
Note that this is (and always was) a terrible hack and we really should replace it with something reasonable which wouldn't need changing every time linuxdoc-tools evolve. I also needed to include a patched version of LinuxDocTools.pm, because the original one explicitly refused to work with a non-linuxdoc DTD. The authors of linuxdoc recommend to use sgmltools-lite in such cases, but it would mean rewritting our formatting rules to the DSSSL language which I don't dare to speak about here :)
430 lines
9.0 KiB
Perl
430 lines
9.0 KiB
Perl
#
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# fmt_txt.pl
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#
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# $Id$
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#
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# TXT-specific driver stuff
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#
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# © Copyright 1996, Cees de Groot
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#
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package LinuxDocTools::fmt_txt;
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use strict;
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use File::Copy;
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use Text::EntityMap;
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use LinuxDocTools::CharEnts;
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use LinuxDocTools::Lang;
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use LinuxDocTools::Vars;
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use LinuxDocTools::Utils qw(create_temp);
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my $txt = {};
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$txt->{NAME} = "txt";
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$txt->{HELP} = "";
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$txt->{OPTIONS} = [
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{ option => "manpage", type => "f", short => "m" },
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{ option => "filter", type => "f", short => "f" },
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{ option => "blanks", type => "i", short => "b" }
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];
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$txt->{manpage} = 0;
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$txt->{filter} = 0;
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$txt->{blanks} = 3;
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$Formats{$txt->{NAME}} = $txt;
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#
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# Set correct NsgmlsOpts
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#
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$txt->{preNSGMLS} = sub
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{
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if ($txt->{manpage})
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{
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$global->{NsgmlsOpts} .= " -iman ";
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$global->{charset} = "man";
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}
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else
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{
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$global->{NsgmlsOpts} .= " -ifmttxt ";
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$global->{charset} = "latin1" if $global->{charset} eq "latin";
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}
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#
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# Is there a cleaner solution than this? Can't do it earlier,
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# would show up in the help messages...
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#
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# the language support ja.
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# the charset support nippon.
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#
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$global->{format} = $global->{charset};
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$global->{charset} = "nippon" if $global->{language} eq "ja";
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$global->{format} = "groff" if $global->{format} eq "ascii";
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$global->{format} = "groff" if $global->{format} eq "nippon";
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$global->{format} = "groff" if $global->{format} eq "euc-kr";
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$ENV{SGML_SEARCH_PATH} =~ s/txt/$global->{format}/;
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$Formats{"groff"} = $txt;
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$Formats{"latin1"} = $txt;
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$Formats{"man"} = $txt;
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$global->{NsgmlsPrePipe} = "cat $global->{file} " ;
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};
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# Ascii escape sub. this is called-back by `parse_data' below in
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# `txt_preASP' to properly escape `\' characters coming from the SGML
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# source.
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my $txt_escape = sub {
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my ($data) = @_;
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$data =~ s|"|\\\&\"|g; # Insert zero-width space in front of "
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$data =~ s|^\.|\\&.|; # ditto in front of . at start of line
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$data =~ s|\\|\\\\|g; # Escape backslashes
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return ($data);
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};
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#
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# Run the file through the genertoc utility before sgmlsasp. Not necessary
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# when producing a manpage. A lot of code from FJM, untested by me.
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#
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$txt->{preASP} = sub
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{
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my ($infile, $outfile) = @_;
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my (@toc, @lines);
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my $char_maps = load_char_maps ('.2tr', [ Text::EntityMap::sdata_dirs() ]);
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if ( $global->{charset} eq "latin1" )
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{
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$char_maps = load_char_maps ('.2l1tr', [ Text::EntityMap::sdata_dirs() ]);
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}
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if ($txt->{manpage})
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{
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while (<$infile>)
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{
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if (/^-/)
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{
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my ($str) = $';
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chop ($str);
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print $outfile "-" .
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parse_data ($str, $char_maps, $txt_escape) . "\n";
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next;
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}
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elsif (/^A/)
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{
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/^A(\S+) (IMPLIED|CDATA|NOTATION|ENTITY|TOKEN)( (.*))?$/
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|| die "bad attribute data: $_\n";
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my ($name,$type,$value) = ($1,$2,$4);
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if ($type eq "CDATA")
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{
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# CDATA attributes get translated also
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$value = parse_data ($value, $char_maps, $txt_escape);
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}
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print $outfile "A$name $type $value\n";
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next;
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}
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#
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# Default action if not skipped over with next: copy in to out.
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#
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print $outfile $_;
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}
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return;
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}
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# note the conversion of `sdata_dirs' list to an anonymous array to
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# make a single argument
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#
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# Build TOC. The file is read into @lines in the meantime, we need to
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# traverse it twice.
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#
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push (@toc, "(HLINE\n");
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push (@toc, ")HLINE\n");
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push (@toc, "(P\n");
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push (@toc, "-" . Xlat ("Table of Contents") . "\n");
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push (@toc, ")P\n");
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push (@toc, "(VERB\n");
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my (@prevheader, @header);
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my $appendix = 0;
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my $nonprint = 0;
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while (<$infile>)
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{
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push (@lines, $_);
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if (/^\(SECT(.*)/)
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{
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@prevheader = @header;
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@header = @header[0..$1];
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if ($appendix == 1)
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{
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$header[$1] = "A";
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$appendix = 0;
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} else
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{
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$header[$1]++;
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}
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}
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if (/^\(APPEND(.*)/)
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{
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$appendix = 1;
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}
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if (/^\(HEADING/)
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{
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$_ = <$infile>;
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s/\\n/ /g;
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push (@lines, $_);
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chop;
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s/^-//;
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$_ = join(".",@header) . " " . $_;
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s/\(\\[0-9][0-9][0-9]\)/\\\1/g;
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if (!$#header)
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{
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# put a newline before top-level sections unless previous was also
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# a top level section
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$_ = "\\n" . $_ unless (!$#prevheader);
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# put a . and a space after top level sections
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s/ /. /;
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##### $_ = "-" . $_ . "\\n";
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$_ = "-" . $_;
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}
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else
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{
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# subsections get indentation matching hierarchy
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$_ = "-" . " " x $#header . $_;
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}
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# remove tags from a toc
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s/\)TT//g;
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s/\(TT//g;
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s/\)IT//g;
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s/\(IT//g;
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s/\)EM//g;
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s/\(EM//g;
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s/\)BF//g;
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s/\(BF//g;
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s/AID * CDATA.*$//g;
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s/\)LABEL//g;
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s/\(LABEL//g;
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push(@toc, parse_data ($_, $char_maps, $txt_escape));
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$_ = <$infile>;
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while (!/^\)HEADING/) {
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s/\\n/ /g; ####
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push(@lines, $_);
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chop;
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s/^-//;
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# remove tags from a toc
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s/\)TT//g;
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s/\(TT//g;
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s/\)IT//g;
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s/\(IT//g;
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s/\)EM//g;
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s/\(EM//g;
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s/\)BF//g;
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s/\(BF//g;
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s/AID * CDATA.*$//g;
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s/\)LABEL//g;
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s/\(LABEL//g;
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# remove NIDX, NCDX from a toc entry
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if (/^\(NIDX$/ || /^\(NCDX$/) { $nonprint = 1; }
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if (/^\)NIDX$/ || /^\)NCDX$/) { $nonprint = 1; }
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# $_ = "-" . $_ . "\\n";
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push(@toc, parse_data ($_, $char_maps, $txt_escape))
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if (! $nonprint);
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$_ = <$infile>;
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}
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s/\\n/ /g; ###
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push(@lines, $_);
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push(@toc, "\\n\n");
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}
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}
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push (@toc, ")VERB\n");
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push (@toc, "(HLINE\n");
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push (@toc, ")HLINE\n");
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my $inheading = 0;
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my $tipo = '';
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for (@lines)
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{
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if ($inheading)
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{
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next if (/^\)TT/ || /^\(TT/ || /^\)IT/ || /^\(IT/ ||
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/^\)EM/ || /^\(EM/ || /^\)BF/ || /^\(BF/);
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if (/^-/)
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{
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$tipo .= $' ;
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chop ($tipo);
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$tipo .= " " unless $tipo =~ / $/;
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}
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else
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{
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$tipo =~ s/ $//;
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if ($tipo)
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{
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print $outfile "-"
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. parse_data ($tipo, $char_maps, $txt_escape)
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. "\n";
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}
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print $outfile $_;
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$tipo = '';
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}
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if (/^\)HEADING/)
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{
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$inheading = 0;
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}
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next;
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}
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if (/^\(HEADING/)
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{
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#
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# Go into heading processing mode.
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#
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$tipo = '';
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$inheading = 1;
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}
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if (/^\(TOC/)
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{
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print $outfile @toc;
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next;
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}
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if (/^-/)
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{
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my ($str) = $';
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chop ($str);
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print $outfile "-" . parse_data ($str, $char_maps, $txt_escape) . "\n";
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next;
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}
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elsif (/^A/)
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{
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/^A(\S+) (IMPLIED|CDATA|NOTATION|ENTITY|TOKEN)( (.*))?$/
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|| die "bad attribute data: $_\n";
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my ($name,$type,$value) = ($1,$2,$4);
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if ($type eq "CDATA")
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{
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# CDATA attributes get translated also
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$value = parse_data ($value, $char_maps, $txt_escape);
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}
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print $outfile "A$name $type $value\n";
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next;
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}
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#
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# Default action if not skipped over with next: copy in to out.
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#
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print $outfile $_;
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}
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};
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#
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# Take the sgmlsasp output, and make something
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# useful from it.
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#
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$txt->{postASP} = sub
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{
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my $infile = shift;
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my ($outfile, $groffout);
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if ($txt->{manpage})
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{
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$outfile = new FileHandle ">$global->{filename}.man";
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}
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else
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{
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create_temp("$global->{tmpbase}.txt.1");
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$outfile = new FileHandle
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"|$main::progs->{GROFF} $global->{pass} -T $global->{charset} -t $main::progs->{GROFFMACRO} >\"$global->{tmpbase}.txt.1\"";
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}
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#
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# Feed $outfile with roff input.
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#
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while (<$infile>)
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{
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unless (/^\.DS/.../^\.DE/)
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{
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s/^[ \t]{1,}(.*)/$1/g;
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}
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s/^\.[ \t].*/\\\&$&/g;
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s/\\fC/\\fR/g;
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s/^.ft C/.ft R/g;
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print $outfile $_;
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}
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$outfile->close;
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#
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# If we were making a manpage, we're done. Otherwise, a little bit
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# of work is left.
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#
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if ($txt->{manpage})
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{
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return 0;
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}
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else
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{
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$outfile->open (">$global->{filename}.txt");
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$groffout = new FileHandle "<$global->{tmpbase}.txt.1";
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my $count = 0;
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if ($txt->{filter})
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{
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while (<$groffout>)
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{
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s/[^\cH][^\cH]\cH\cH//g;
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s/.//g;
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if ($txt->{blanks})
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{
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$count = &{$txt->{cutblank}}($count, $outfile, $_);
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}
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else
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{
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print $outfile $_;
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}
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}
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}
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else
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{
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if ($txt->{blanks})
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{
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while (<$groffout>)
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{
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$count = &{$txt->{cutblank}}($count, $outfile, $_);
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}
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}
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else
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{
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copy ($groffout, $outfile);
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}
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}
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}
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$groffout->close;
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$outfile->close;
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return 0;
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};
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$txt->{cutblank} = sub
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{
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my ($num, $out, $in) = @_;
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if ( $in =~ /^$/ )
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{
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$num++;
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}
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else
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{
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$num = 0;
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}
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if ( $num <= $txt->{blanks} )
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{
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print $out $in;
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}
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return ($num);
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};
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1;
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