1 files changed, 37 insertions, 0 deletions
diff --git a/fixupdiff.pl b/fixupdiff.pl
new file mode 100644
index 0000000..f66eaa3
--- /dev/null
+++ b/fixupdiff.pl
@@ -0,0 +1,37 @@
+use strict;
+
+my $lstlisting=0;
+
+while (<>) {
+	my $line = $_;
+	if (m/%DIFDELCMD\s+<\s+\\begin\{lstlisting\}/) {
+		$lstlisting=1;
+		$line =~s/%DIFDELCMD\s+</{\\lstset{escapechar=\\\$} /;
+	}
+	if ($lstlisting) {
+		$line =~ s/%DIFDELCMD\s+< //;
+		if (not $line =~ m/\\(?:begin|end)\{lstlisting\}/) {
+			$line =~ s/([#&{} ])/\\$1/g;
+			$line =~ s/(.*)/\$\\DIFdel\{$1\}\$/;
+		}
+		#print "%FIXED BY RULE 1\n";
+	}
+
+	# Too many \color directives (generated by DIFdel/addbegin/end)
+	# confuse xetex, producing errors:
+	# WARNING ** Color stack overflow. Just ignore.
+	# and resulting in corrupted color in output.
+	# As a work-around, detect cases where it's safe, and replace \color with
+	# \textcolor.
+	# As a result, number of \color directives goes does sufficiently
+	# enough to avoid the overflow error.
+
+	$line =~ s/\\DIFdelbegin \\DIFdel\{([^}]*)\}\\DIFdelend/\\DIFdeltext{$1}/;
+	$line =~ s/\\DIFaddbegin \\DIFadd\{([^}]*)\}\\DIFaddend/\\DIFaddtext{$1}/;
+
+	print $line;
+	if (m/%DIFDELCMD\s+<\s+\\end\{lstlisting\}/) {
+		print "}\n";
+		$lstlisting=0;
+	}
+}