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package HTML::FormFu::OutputProcessor::StripWhitespace;
$HTML::FormFu::OutputProcessor::StripWhitespace::VERSION = '2.01';
use Moose;
use MooseX::Attribute::FormFuChained;
extends 'HTML::FormFu::OutputProcessor';
use HTML::FormFu::Constants qw( $EMPTY_STR );
use HTML::TokeParser::Simple;
use List::MoreUtils qw( any );
has collapse_tags => (
is => 'rw',
default => sub {
[ qw(
fieldset
form
hr
legend
optgroup
option
table
td
th
tr
) ];
},
lazy => 1,
traits => ['FormFuChained'],
);
has collapse_consecutive_tags => (
is => 'rw',
default => sub {
[ qw(
span
div
) ];
},
lazy => 1,
traits => ['FormFuChained'],
);
sub process {
my ( $self, $input ) = @_;
my $parser = HTML::TokeParser::Simple->new( \$input );
my @tokens;
while ( my $token = $parser->get_token ) {
push @tokens, $token;
}
my $iter
= HTML::FormFu::OutputProcessor::StripWhitespace::_iter->new(@tokens);
my @collapse = @{ $self->collapse_tags };
my @consecutive = @{ $self->collapse_consecutive_tags };
my $output = $EMPTY_STR;
while ( defined( my $token = $iter->next ) ) {
if ( $token->is_start_tag ) {
my $tag = $token->get_tag;
my $prev_tag = $iter->prev_tag_name;
if ( any { $tag eq $_ } @collapse ) {
# strip \s from before us
$output =~ s/ \s+ \z //x;
}
elsif ( defined $prev_tag ) {
# strip \s between <start> <start>
for my $consec (@consecutive) {
if ( $tag eq $consec && $tag eq $prev_tag ) {
$output =~ s/ \s+ \z //x;
}
}
}
}
elsif ( $token->is_end_tag ) {
my $tag = $token->get_tag;
my $prev_tag = $iter->prev_tag_name;
if ( any { $tag eq $_ } @collapse ) {
# strip \s from before us
$output =~ s/ \s+ \z //x;
}
elsif ( defined $prev_tag ) {
# strip \s between </end> </end>
for my $consec (@consecutive) {
if ( $tag eq $consec && $tag eq $prev_tag ) {
$output =~ s/ \s+ \z //x;
}
}
}
}
my $prev_tag = $iter->prev_tag_name;
if ( defined $prev_tag && any { $prev_tag eq $_ } @collapse ) {
$output =~ s/ \s+ \z //x;
my $part = $token->as_is;
$part =~ s/ ^ \s+ //x;
$output .= $part;
}
else {
$output .= $token->as_is;
}
}
return $output;
}
__PACKAGE__->meta->make_immutable;
package HTML::FormFu::OutputProcessor::StripWhitespace::_iter;
$HTML::FormFu::OutputProcessor::StripWhitespace::_iter::VERSION = '2.01';
use Moose;
use MooseX::Attribute::FormFuChained;
sub new {
my ( $class, @tags ) = @_;
my %self = (
tags => \@tags,
i => 0,
);
return bless \%self, $class;
}
sub next {
my ($self) = @_;
return $self->{tags}[ $self->{i}++ ];
}
sub prev_tag_name {
my ($self) = @_;
my $i = $self->{i} - 2;
while ( $i >= 0 ) {
if ( $self->{tags}[$i]->is_tag ) {
return if !$self->{tags}[$i]->is_tag;
return $self->{tags}[$i]->get_tag;
}
--$i;
}
}
__PACKAGE__->meta->make_immutable( inline_constructor => 0 );
1;
__END__
=head1 NAME
HTML::FormFu::OutputProcessor::StripWhitespace - Strip shitespace from HTML output
=head1 SYNOPSIS
---
output_processors:
- StripWhitespace
=head1 METHODS
=head2 collapse_tags
=head2 collapse_consecutive_tags
=head1 SEE ALSO
Is a sub-class of, and inherits methods from L<HTML::FormFu::OutputProcessor>
L<HTML::FormFu>
=head1 AUTHOR
Carl Franks C<cfranks@cpan.org>
=head1 LICENSE
This library is free software, you can redistribute it and/or modify it under
the same terms as Perl itself.
=cut
|
