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inc/Inline/denter.pm  view on Meta::CPAN

package Inline::denter;

use strict;
use Carp;

sub new {
    my $class = shift;
    bless {width => 4,
           comma => " : ",
           level => 0,
           tabwidth => 8,
          }, $class;
}

# Prevent a taint exception being thrown by AutoLoader.pm.
# Serves no other purpose.
sub DESTROY {
}

sub undent {
    local $/ = "\n";
    my ($o, $text) = @_;
    my ($comma) = $o->{comma};
    my $package = caller;
    $package = caller(1) if $package eq 'Inline::denter';
    %{$o->{xref}} = ();
    @{$o->{objects}} = ();
    @{$o->{context}} = ();
    my $glob = '';
    chomp $text;
    @{$o->{lines}} = split $/, $text;
    $o->{level} = 0;
    $o->{line} ||= 1;
    $o->_setup_line;
    while (not $o->{done}) {
        if ($o->{level} == 0 and
            $o->{content} =~ /^(\w+)\s*$comma\s*(.*)$/) {
            $o->{content} = $2;
            no strict 'refs';
            push @{$o->{objects}}, "$1";
        }
        push @{$o->{objects}}, $o->_undent_data;
    }
    return @{$o->{objects}};
}

sub _undent_data {
    my $o = shift;
    my ($obj, $class) = ('', '');
    my @refs;
    my %refs;
    while ($o->{content} =~ s/^\\(?:\((\w+)\))?((\%|\@|\$|\\).*)/$2/) {
        push @refs, $1;
        $refs{$1} = scalar @refs;
    }
    if ($o->{content} =~ /^([\%\@\$])
                          (\w(?:\w|::)*)?
                          \s*$/x
       ) {
        my $foo;
        $obj = ($1 eq '%') ? {} : ($1 eq '@') ? [] : \$foo;
        $class = $2 || '';
        if ($1 eq '%') {
            %$obj = $o->_undent_hash;
        }
        elsif ($1 eq '@') {
            @$obj = $o->_undent_array;
        }
        else {
            $$obj = $o->_undent_scalar;
        }
        bless $obj, $class if length $class;
    }
    elsif ($o->{content} =~ /^\?\s*$/) {
        $obj = $o->_undent_undef;
    }
    else {
        $obj = $o->_undent_value;
    }
    while (@refs) {
        my $ref = pop @refs;
        my $copy = $obj;
        $obj = \ $copy;
        $o->{xref}{$ref} = $obj if $ref;
    }
    return $obj;
}

sub _undent_value {
    my $o = shift;
    my $value = '';
    if ($o->{content} =~ /^\<\<(\w+)(\-?)\s*$/) {
        my ($marker, $chomp) = ($1, $2);
        my $line = $o->{line};
        $o->_next_line;
        while (not $o->{done} and
               $o->{lines}[0] ne $marker) {
            $value .= $o->{lines}[0] . "\n";
            $o->_next_line;
        }
        croak M03_no_value_end_marker($marker, $line) if $o->{done};
        chomp $value if $chomp;
    }
    elsif ($o->{content} =~ /^\"/) {
        croak $o->M04_mismatched_quotes unless $o->{content} =~ /^\".*\"\s*$/;
        ($value = $o->{content}) =~ s/^\"|\"\s*$//g;
    }
    else {
        $value = $o->{content};
    }
    $o->_next_line;
    $o->_setup_line;
    return $value;
}

sub _undent_hash {
    my @values;
    my $o = shift;
    my $level = $o->{level} + 1;
    $o->_next_line;
    $o->_setup_line;
    while ($o->{level} == $level) {
        my ($key, $value) = split $o->{comma}, $o->{content};
        croak $o->M05_invalid_key_value unless (defined $key and defined $value);
        $o->{content} = $value;
        push @values, $o->_get_key($key), $o->_undent_data;;
    }
    croak $o->M06_invalid_indent_level if $o->{level} > $level;
    return @values;
}

sub _get_key {