#!/bin/sh

# Usage: hchangered oldfile newfile

# hchangered - crude tool to red-color changes in HTML text. Text is 
# also underlined so it shows on monochrome printers.

# Bugs: does not red-color text inside tables. Fascist software may
# complain about tags being out of order.

diff -e $1 $2 | (sed -n -e '
/[ac]$/{
	p
	a\
<font color="red"><u>
: loop
	n
	/^\.$/b done1
	p
	b loop
: done1
	a\
</u></font>\
.
	b
}
/d$/{
	a\
	i\
<font color="red"><u>[DELETED]</u></font>\
.
	p
	b
}
'; echo '1,$p') | ed - $1 | perl -e '
$buf = join("", <STDIN>);
$buf =~ s/pre>\s+<font/pre><font/g;
$buf =~ s/font>\s+<\/pre/font><\/pre/g;
print $buf;
'