1 files changed, 59 insertions, 0 deletions
diff --git a/pandoc-todo b/pandoc-todo
new file mode 100755
index 0000000..784b8fa
--- /dev/null
+++ b/pandoc-todo
@@ -0,0 +1,59 @@
+#!/usr/bin/perl
+
+# TODO: support multi-match within word
+# TODO: support multi-word match
+# TODO: always count and allow expressing which (default: all)
+# TODO: parse regex+commeent as definition in external markdown TODO file.
+# TODO: normal hyphenation within note (keep quote with word in "word")
+
+use warnings;
+use strict;
+
+use feature qw(switch);
+no if $] >= 5.018, warnings => "experimental::smartmatch";
+
+use Pandoc::Filter 0.05;
+use Pandoc::Elements;
+
+my $breakable_chars = qr/[\&\;\/\.\?\!\=]/;
+my $hyphen_chars = qr/[\x{2010}-\x{2015}\x{2053}\x{2212}]/;
+my $doublequote_chars = qr/[\x{00AB}\x{00BB}\x{201C}-\x{201F}\x{300C}-\x{300F}\x{301D}-\x{301F}\x{FE41}-\x{FE44}\x{FF02}\x{FF62}\x{FF63}]/;
+my $singlequote_chars = qr/[\x{0060}\x{2018}\x{2019}\x{201A}\x{201B}\x{2039}\x{203A}\x{FF07}]/;
+my $odd_singlequote_chars = qr/[\x{2019}]/;
+
+pandoc_filter(
+	\&todo,
+);
+
+sub latex_encode {
+	my $s = shift;
+	$s =~ s/(?<!\s|$breakable_chars)($breakable_chars])(?!\s)/$1\\-/g;
+	$s =~ s/$odd_singlequote_chars/'/g; #'
+	return $s;
+}
+
+sub mark_inside {
+	my ( $before, $it, $after, $note ) = @_;
+	return [ RawInline( 'latex', sprintf( '%s\\todo{%s}\\hl{%s}%s',
+		latex_encode($before),
+		latex_encode($note),
+		latex_encode($it),
+		latex_encode($after),
+	))];
+};
+
+sub todo {
+	my $self = shift;
+	return unless ( $self->name eq 'Str' );
+	given ($self->content) {
+		when (/^(-)$/) {
+			return mark_inside( '', $1, '', 'double dash?' ) };
+		when ( /^(.*?)($hyphen_chars(?:.*$hyphen_chars)?)(.*?)$/ ) {
+			return mark_inside( $1, $2, $3, 'bad dash/hyphen' ) };
+		when ( /^(.*?)($doublequote_chars(?:.*$doublequote_chars)?)(.*?)$/ ) {
+			return mark_inside( $1, $2, $3, 'bad quote' ) };
+		when ( /^(.*?)($singlequote_chars(?:.*$singlequote_chars)?)(.*?)$/ ) {
+			return mark_inside( $1, $2, $3, 'Bad quote/apostrophe' ) };
+		default { return };
+	}
+};