$VERSION = sprintf("%d.%02d", q
$Revision: 2.9 $ =~ /(\d+)\.(\d+)/);
sub declaration
{ $_[0]->output("<!$_[1]>") }
sub process
{ $_[0]->output($_[2]) }
sub comment
{ $_[0]->output("<!--$_[1]-->") }
sub start
{ $_[0]->output($_[4]) }
sub end
{ $_[0]->output($_[2]) }
sub text
{ $_[0]->output($_[1]) }
sub output
{ print $_[1] }
HTML::Filter - Filter HTML text through the parser
This module is deprecated. C<HTML::Parser> now provides the
functionally of C<HTML::Filter> much more efficiently with the the
$p = HTML::Filter->new->parse_file("index.html");
C<HTML::Filter> is an HTML parser that by default prints the
original text of each HTML element (a slow version of cat(1) basically).
The callback methods may be overridden to modify the filtering for some
HTML elements and you can override output() method which is called to
C<HTML::Filter> is a subclass of C<HTML::Parser>. This means that
the document should be given to the parser by calling the $p->parse()
or $p->parse_file() methods.
The first example is a filter that will remove all comments from an
HTML file. This is achieved by simply overriding the comment method
sub comment { } # ignore comments
The second example shows a filter that will remove any E<lt>TABLE>s
found in the HTML file. We specialize the start() and end() methods
to count table tags and then make output not happen when inside a
$self->{table_seen}++ if $_[0] eq "table";
$self->{table_seen}-- if $_[0] eq "table";
unless ($self->{table_seen}) {
$self->SUPER::output(@_);
If you want to collect the parsed text internally you might want to do
package FilterIntoString;
sub output { push(@{$_[0]->{fhtml}}, $_[1]) }
sub filtered_html { join("", @{$_[0]->{fhtml}}) }
Copyright 1997-1999 Gisle Aas.
This library is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.