File Coverage

blib/lib/Indent/Data.pm

Criterion	Covered	Total	%
statement	45	45	100.0
branch	12	12	100.0
condition	3	3	100.0
subroutine	8	8	100.0
pod	2	2	100.0
total	70	70	100.0

package Indent::Data;

use strict;
use warnings;

use Class::Utils qw(set_params);
use Error::Pure qw(err);
use Indent::Utils qw(line_size_check string_len);
use Readonly;

# Constants.
Readonly::Scalar my $EMPTY_STR => q{};
Readonly::Scalar my $LINE_SIZE => 79;

our $VERSION = 0.08;

# Constructor.
sub new {
	my ($class, @params) = @_;
	my $self = bless {}, $class;

	# Options.
	$self->{'line_size'} = $LINE_SIZE;
	$self->{'next_indent'} = "\t";

	# Output.
	$self->{'output_separator'} = "\n";

	# Process params.
	set_params($self, @params);

	# 'line_size' check.
	line_size_check($self);

	# Error with 'next_indent' length greater than 'line_size'.
	if ($self->{'line_size'} <= length $self->{'next_indent'}) {
		err "Bad line_size = '$self->{'line_size'}' ".
			"or length of string '$self->{'next_indent'}'.";
	}

	# Object.
	return $self;
}

# Parses tag to indented data.
sub indent {
	my ($self, $data, $act_indent, $non_indent) = @_;

	# Undef indent.
	if (! $act_indent) {
		$act_indent = $EMPTY_STR;
	}

	# If non_indent data, than return.
	if ($non_indent) {
		return $act_indent.$data;
	}

	# Check to actual indent maximal length.
	if (string_len($act_indent) > ($self->{'line_size'}
		- string_len($self->{'next_indent'}) - 1)) {

		err 'Bad actual indent value. Length is greater then '.
			'(\'line_size\' - \'size of next_indent\' - 1).';
	}

	# Splits data.
	my $first = undef;
	my $second = $act_indent.$data;
	my @data;
	while (string_len($second) >= $self->{'line_size'}) {
		$first = substr($second, 0, $self->{'line_size'});
		$second = $act_indent.$self->{'next_indent'}.substr($second,
			$self->{'line_size'});

		# Parsed part of data to @data array.
		push @data, $first;
	}

	# Add other data to @data array.
	if ($second && $second ne $act_indent.$self->{'next_indent'}) {
		push @data, $second;
	}

	# Return as array or one line with output separator between its.
	return wantarray ? @data : join($self->{'output_separator'}, @data);
}

1;

__END__