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555 lines
18 KiB
Perl
Executable File
Vendored
555 lines
18 KiB
Perl
Executable File
Vendored
#!/usr/bin/env perl
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# SPDX-FileCopyrightText: 2021 Pragmatic Software <pragma78@gmail.com>
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# SPDX-License-Identifier: MIT
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# ugly and hacked together
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# n1256: pdftotext -layout -y 75 -H 650 -W 1000 n1256.pdf n1256.in
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# n1570: pdftotext -layout -y 80 -H 650 -W 1000 n1570.pdf n1570.in
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# n3047: pdftotext -layout -y 75 -H 700 -W 1000 n3047.pdf n3047.in
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use warnings;
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use strict;
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use HTML::Entities;
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use Data::Dumper;
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my $debug = 100;
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binmode(STDOUT, ":utf8");
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binmode(STDERR, ":utf8");
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my $input = "@ARGV";
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if (not length $input) {
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print STDERR "Usage: $0 <input file>\n";
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exit 1;
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}
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open FH, "<:encoding(UTF-8)", $input or die "Could not open $input: $!";
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my @contents = <FH>;
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close FH;
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my $text = join '', @contents;
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$text =~ s/\r//g;
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my $section_title;
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my $this_section = '';
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my %sections;
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my @last_section_number;
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my @section_number;
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my $last_section = '';
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my @footnotes;
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my $footnote = 0;
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my $last_footnote = 0;
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gen_data();
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gen_txt();
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#gen_html();
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sub gen_data {
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while ($text =~ m/^\f?\s{0,5}([0-9A-Z]+\.[0-9\.]*)/msg) {
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$last_section = $this_section;
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$this_section = $1;
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@last_section_number = @section_number;
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@section_number = split /\./, $this_section;
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print STDERR "----------------------------------\n" if $debug;
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print STDERR "Processing section [$this_section]\n" if $debug;
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validate_section_difference();
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my $section_text;
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if ($text =~ m/(.*?)^(?=\f?\s{0,4}[0-9A-Z]+\.)/msg) {
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$section_text = $1;
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} else {
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print STDERR "No section text, end of file marker found.\n";
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last;
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}
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if ($section_text =~ m/(.*?)$/msg) {
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if (length $1) {
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$section_title = $1;
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$section_title =~ s/^\s+//;
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$section_title =~ s/\s+$//;
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print STDERR "+++ set new section title: [$section_title]\n" if $debug;
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} else {
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print STDERR "--- no length for section title\n" if $debug;
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}
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} else {
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print STDERR "--- no new section title\n" if $debug;
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}
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$sections{$this_section}{title} = $section_title;
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($section_text) = $section_text =~ m/\s*(.*)/msg;
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print STDERR "+++ $this_section [$section_title]\n" if $debug >= 2;
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print STDERR "+++ section text: [$section_text]\n" if $debug >= 2;
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if (not $section_text =~ m/^(?=\d+\s)/msg) {
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print STDERR "??? no paragraphs in section\n" if $debug;
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$section_text =~ s/~~//msg;
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$section_text =~ s/ZZZ//msg;
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$sections{$this_section}{text} = $section_text;
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} else {
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my $last_p = 0;
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my $p = 0;
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print STDERR "+++ getting paragraphs for $this_section\n" if $debug;
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my $pretext;
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if ($section_text =~ m/^(?!\f?\d+\s)/) {
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($pretext) = $section_text =~ m/^(.*?)^(?=\f?\d+\s)/ms;
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print STDERR "pretext captured: [$pretext]\n";
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}
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while ($section_text =~ m/^\f?(\d+)\s(.*?)^(?=\f?\d)/msgc or $section_text =~ m/^\f?(\d+)\s(.*)/msg) {
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$last_p = $p;
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$p = $1;
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my $t = $2;
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if (length $pretext) {
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$t = "$pretext $t";
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$pretext = '';
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}
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print STDERR "paragraph $p: [$t]\n" if $debug >= 3;
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if ($p - $last_p != 1) {
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die "Paragraph diff invalid" unless ($input eq 'n1570.in' && $this_section =~ /^(?:K.3.9.(?:2|3))/);
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}
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# check for footnotes
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my @new_footnotes;
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while ($t =~ m/^\s*(\d+)\)\s*(.*?)$/mgc) {
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$footnote = $1;
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my $footnote_text = "$2\n";
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print STDERR "processing 1st footnote $footnote [last: $last_footnote]\n" if $debug;
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print STDERR "footnote text [$footnote_text]\n" if $debug;
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if ($last_footnote - $footnote != -1) {
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die "Footnote diff invalid";
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}
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$last_footnote = $footnote;
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push @new_footnotes, $footnote;
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print STDERR "footnote $footnote text: [$footnote_text]\n" if $debug >= 4;
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while ($t =~ m/^(.*?)$/mgc) {
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my $line = $1;
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print STDERR "processing [$line]\n" if $debug;
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if ($line =~ m/^\f/mg) {
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print STDERR "end of footnote $footnote\n";
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last;
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}
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if (not length $line or $line =~ m/^\s+$/) {
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print STDERR "skipping empty line\n";
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next;
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}
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if ($line =~ m/^\s*(\d+)\)\s*(.*?)$/mg) {
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print STDERR "----------------\n" if $debug >= 1;
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print STDERR "+++ added footnote $footnote: [$footnote_text]\n" if $debug >= 1;
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$footnotes[$footnote] = $footnote_text;
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print STDERR "----------------\n" if $debug >= 1;
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$footnote = $1;
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$footnote_text = "$2\n";
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print STDERR "processing 2nd footnote $footnote [last: $last_footnote]\n" if $debug;
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if ($last_footnote - $footnote != -1) {
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die "Footnote diff invalid";
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}
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$last_footnote = $footnote;
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push @new_footnotes, $footnote;
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print STDERR "footnote $footnote text: [$footnote_text]\n" if $debug >= 4;
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next;
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}
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if (not length $line or $line =~ m/^\s+$/) {
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print STDERR "footnote $footnote: skipping empty line\n";
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} else {
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$footnote_text .= "$line\n";
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print STDERR "footnote $footnote text: appending [$line]\n" if $debug >= 3;
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}
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}
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print STDERR "----------------\n" if $debug >= 1;
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print STDERR "+++ added footnote $footnote: [$footnote_text]\n" if $debug >= 1;
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$footnotes[$footnote] = $footnote_text;
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print STDERR "----------------\n" if $debug >= 1;
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}
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# strip footnotes from section text
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foreach my $fn (@new_footnotes) {
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my $sub = quotemeta $footnotes[$fn];
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$sub =~ s/(\\ )+/\\s*/g;
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#print STDERR "subbing out [$footnote) $sub]\n";
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$t =~ s/^\s*$fn\)\s*$sub//ms;
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}
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$t =~ s/\f//g;
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$t =~ s/~~//msg;
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$t =~ s/ZZZ//msg;
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$sections{$this_section . "p$p"}{text} = "$p $t";
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print STDERR "+++ added ${this_section}p$p:\n$p $t\n" if $debug;
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}
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print STDERR "+++ paragraphs done\n" if $debug;
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}
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}
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}
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sub bysection {
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my $inverse = 1;
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my ($a1, $p1) = split /p/, $a;
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my ($b1, $p2) = split /p/, $b;
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$p1 //= 0;
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$p2 //= 0;
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my @k1 = split /\./, $a1;
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my @k2 = split /\./, $b1;
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my @r;
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if ($#k2 > $#k1) {
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my @tk = @k1;
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@k1 = @k2;
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@k2 = @tk;
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my $tp = $p1;
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$p1 = $p2;
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$p2 = $tp;
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$inverse = -1;
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} else {
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$inverse = 1;
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}
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my $i = 0;
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for (; $i < $#k1 + 1; $i++) {
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if (not defined $k2[$i]) { $r[$i] = 1; }
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else {
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if ($i == 0) { $r[$i] = $k1[$i] cmp $k2[$i]; }
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else { $r[$i] = $k1[$i] <=> $k2[$i]; }
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}
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}
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$r[$i] = ($p1 <=> $p2);
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my $ret = 0;
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foreach my $rv (@r) {
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if ($rv != 0) {
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$ret = $rv;
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last;
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}
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}
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return $ret * $inverse;
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}
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sub gen_txt {
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my $footer = "";
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my $paren = 0;
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my $section_head;
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my $section_title;
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foreach my $this_section (sort bysection keys %sections) {
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print STDERR "writing section $this_section\n" if $debug;
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if (not $this_section =~ m/p/) {
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print "$this_section $sections{$this_section}{title}\n";
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$section_head = $this_section;
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$section_title = $sections{$this_section}{title};
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}
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my $section_text = $sections{$this_section}{text};
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while ($section_text =~ m/^(.*?)$/msg) {
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my $line = $1;
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print STDERR "paren reset, line [$line]\n" if $debug >= 8;
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my $number = "";
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while ($line =~ m/(.)/g) {
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my $c = $1;
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if ($c =~ m/[0-9]/) { $number .= $c; }
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elsif ($c eq ' ') { $number = ""; }
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elsif ($c eq '(') {
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$paren++;
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print STDERR "got $paren (\n" if $debug >= 8;
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} elsif ($c eq ')') {
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$paren--;
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print STDERR "got $paren )\n" if $debug >= 8;
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if ($paren == -1) {
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if (length $number and defined $footnotes[$number]) {
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print STDERR "Got footnote $number here!\n" if $debug;
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$footer .= "\nFootnote.$number) $footnotes[$number]\n";
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}
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$paren = 0;
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}
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} else {
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$number = "";
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}
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}
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}
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print "$section_text\n";
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if (length $footer) {
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print $footer;
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$footer = "";
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}
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}
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}
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sub make_link {
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my ($text) = @_;
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if (exists $sections{$text}) {
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return "<a href='#$text'>$text</a>";
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} else {
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return $text;
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}
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}
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sub linkify {
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my ($text) = @_;
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$text =~ s/\b((?:[A-Z]|[1-9])\.(?:\.?[0-9]+)*)\b/make_link($1)/ge;
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return $text;
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}
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sub gen_html {
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print "<html>\n<body>\n";
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foreach my $section (qw/ABSTRACT. CONTENTS. FOREWORD. INTRO./) {
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foreach my $paragraph (sort bysection keys %sections) {
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if ($paragraph =~ m/^$section/) {
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write_html_section($paragraph);
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delete $sections{$paragraph};
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}
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}
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delete $sections{$section};
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}
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foreach my $section (sort bysection keys %sections) {
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write_html_section($section);
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}
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print "\n</body>\n</html>\n";
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}
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sub write_html_section {
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my ($this_section) = @_;
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my $footer = "";
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my $paren = 0;
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print STDERR "writing section [$this_section]\n" if $debug;
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print "<a name='", encode_entities($this_section), "'></a>\n";
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if (not $this_section =~ m/p/) {
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print "<hr>\n<h3>", encode_entities($this_section), " [", encode_entities($sections{$this_section}{title}), "]</h3>\n";
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}
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my $section_text = $sections{$this_section}{text};
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next if not length $section_text;
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$section_text = encode_entities $section_text;
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while ($section_text =~ m/^(.*?)$/msg) {
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my $line = $1;
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print STDERR "paren reset, line [$line]\n" if $debug >= 8;
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my $number = "";
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while ($line =~ m/(.)/g) {
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my $c = $1;
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if ($c =~ m/[0-9]/) { $number .= $c; }
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elsif ($c eq ' ') { $number = ""; }
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elsif ($c eq '(') {
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$paren++;
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print STDERR "got $paren (\n" if $debug >= 8;
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} elsif ($c eq ')') {
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$paren--;
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print STDERR "got $paren )\n" if $debug >= 8;
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if ($paren == -1) {
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if (length $number and defined $footnotes[$number]) {
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print STDERR "Got footnote $number here!\n" if $debug;
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$section_text =~ s/$number\)/<a href='#FOOTNOTE.$number'><sup>[$number]<\/sup><\/a>/;
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$footer .= "<a name='FOOTNOTE.$number'>\n<pre><i><b>Footnote $number)</b> ".encode_entities($footnotes[$number])."</i></pre>\n</a>\n";
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}
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$paren = 0;
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}
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} else {
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$number = "";
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}
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}
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}
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$section_text = linkify($section_text);
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$footer = linkify($footer);
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if ($this_section eq 'CONTENTS.') {
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$section_text =~ s/Annex ([A-Z])/<a href='#$1.'>Annex $1<\/a>/mg;
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$section_text =~ s/^(\d+\.)/<a href='#$1'>$1<\/a>/mg;
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$section_text =~ s/^Foreword/<a href='#FOREWORD.'>Foreword<\/a>/mg;
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$section_text =~ s/^Introduction/<a href='#INTRO.'>Introduction<\/a>/mg;
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}
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print "<pre>", $section_text, "</pre>\n";
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if (length $footer) {
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print $footer;
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$footer = '';
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}
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}
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# this mess of code verifies that two given section numbers are within 1 unit of distance of each other
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# this ensures that no sections were skipped due to misparses
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sub validate_section_difference {
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if (@last_section_number && $last_section_number[0] !~ /(?:ABSTRACT|CONTENTS|FOREWORD|INTRO)/) {
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my $fail = 0;
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my $skip = 0;
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print STDERR "comparing last section ", join('.', @last_section_number), " vs ", join('.', @section_number), "\n";
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if (@section_number > @last_section_number) {
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if (@section_number - @last_section_number != 1) {
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$fail = 1;
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print STDERR "size difference too great\n";
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}
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unless ($fail) {
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if ($section_number[0] =~ /^[A-Z]+$/) {
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if ($last_section_number[0] =~ /^[A-Z]+$/) {
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for (my $i = 0; $i < @last_section_number; $i++) {
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if ($section_number[$i] ne $last_section_number[$i]) {
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$fail = 1;
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print STDERR "digits different\n";
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last;
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}
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}
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} else {
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print STDERR "disregarding section namespace change from number to alphabet\n";
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$skip = 1;
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}
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} else {
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for (my $i = 0; $i < @last_section_number; $i++) {
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if ($section_number[$i] ne $last_section_number[$i]) {
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$fail = 1;
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print STDERR "digits different\n";
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last;
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}
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}
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}
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}
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if (!$skip && ($fail || $section_number[$#section_number] != 1)) {
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print STDERR "difference too great ", join('.', @last_section_number), " vs ", join('.', @section_number), "\n";
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die;
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}
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} elsif (@last_section_number > @section_number) {
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if ($section_number[0] =~ /^[A-Z]+$/) {
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if ($last_section_number[0] =~ /^[A-Z]+$/) {
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if ($section_number[0] ne $last_section_number[0]) {
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if (ord($section_number[0]) - ord($last_section_number[0]) != 1) {
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$fail = 1;
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print STDERR "letter difference too great\n";
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} else {
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$skip = 1;
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print STDERR "letter difference good\n";
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}
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}
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unless ($fail) {
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for (my $i = 1; $i < @section_number - 1; $i++) {
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if ($section_number[$i] != $last_section_number[$i]) {
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if ($section_number[$i] - $last_section_number[$i] != 1) {
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print STDERR "digit difference too great\n";
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$fail = 1;
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}
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last;
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}
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}
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}
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} else {
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print STDERR "disregarding section namespace change from number to alphabet\n";
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$skip = 1;
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}
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} else {
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for (my $i = 0; $i < @section_number - 1; $i++) {
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if ($section_number[$i] != $last_section_number[$i]) {
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if ($section_number[$i] - $last_section_number[$i] != 1) {
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print STDERR "digit difference too great\n";
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$fail = 1;
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}
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last;
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|
}
|
|
}
|
|
}
|
|
|
|
if (!$skip && ($fail || $section_number[$#section_number] - $last_section_number[$#section_number] != 1)) {
|
|
print STDERR "difference too great ", join('.', @last_section_number), " vs ", join('.', @section_number), "\n";
|
|
die;
|
|
}
|
|
} else {
|
|
my @rev_last = reverse @last_section_number;
|
|
my @rev_curr = reverse @section_number;
|
|
|
|
if ($rev_curr[$#rev_curr] =~ /^[A-Z]+$/) {
|
|
if ($rev_last[$#rev_last] =~ /^[A-Z]+$/) {
|
|
if ($rev_curr[$#rev_curr] ne $rev_last[$#rev_last]) {
|
|
if (ord($rev_curr[$#rev_curr]) - ord($rev_last[$#rev_last]) != 1) {
|
|
$fail = 1;
|
|
print STDERR "letter difference too great\n";
|
|
}
|
|
}
|
|
for (my $i = 1; $i < @rev_curr; $i++) {
|
|
if ($rev_curr[$i] != $rev_last[$i]) {
|
|
if ($rev_curr[$i] - $rev_last[$i] > 1) {
|
|
$fail = 1;
|
|
}
|
|
last;
|
|
}
|
|
}
|
|
} else {
|
|
print STDERR "disregarding section namespace change from number to alphabet\n";
|
|
$skip = 1;
|
|
}
|
|
} else {
|
|
for (my $i = 0; $i < @rev_curr; $i++) {
|
|
if ($rev_curr[$i] != $rev_last[$i]) {
|
|
if ($rev_curr[$i] - $rev_last[$i] > 1) {
|
|
$fail = 1;
|
|
}
|
|
last;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!$skip && $fail) {
|
|
print STDERR "difference too great ", join('.', @last_section_number), " vs ", join('.', @section_number), "\n";
|
|
die;
|
|
}
|
|
}
|
|
}
|
|
}
|