#!/usr/bin/perl -w
# Shows how to mangle all plain  text in an HTML document, using an arbitrary
# Perl expression. Plain text is all text not within a tag declaration, i.e.
# not in <p ...>, but possibly between <p> and </p>
use strict;
my $code = shift || usage();
$code = 'sub edit_print { local $_ = shift; ' . $code . '; print }';
#print $code;
eval $code;
die $@ if $@;
use HTML::Parser 3.05;
my $p = HTML::Parser->new(unbroken_text => 1,
                          default_h => [ sub { print @_; }, "text" ],
                          text_h    => [ \&edit_print,      "text" ],
                         );
my $file = shift || usage();
$p->parse_file($file) || die "Can't open file $file: $!\n";
sub usage
{
    my $progname = $0;
    $progname =~ s,^.*/,,;
    die "Usage: $progname <perlexpr> <filename>\n";
}