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lib/Acme/PlayCode/Plugin/NumberPlus.pm  view on Meta::CPAN

package Acme::PlayCode::Plugin::NumberPlus;

use Moose::Role;
use List::MoreUtils qw/insert_after/;
use PPI::Token::Comment;

our $VERSION   = '0.11';
our $AUTHORITY = 'cpan:FAYLAND';

around 'do_with_token_flag' => sub {
    my $orig = shift;
    my $self = shift;
    my ( $token_flag ) = @_;
    
    my @tokens = $self->tokens;
    my $token  = $tokens[$token_flag];
    
    use Data::Dumper;
#    print STDERR Dumper(\$token);
    
    my $orginal_flag = $token_flag;
    if ( $token->isa('PPI::Token::Operator') ) {
        my $op = $token->content;
        # only '+' '-' '*' '/' are do-able
        if ( $op eq '+' or $op eq '-' or $op eq '*' or $op eq '/' ) {
            # get next tokens
            my (@next_full_tokens);
            while ( $token_flag++ ) {
                if ($tokens[$token_flag]->isa('PPI::Token::Whitespace') ) {
                    push @next_full_tokens, $tokens[$token_flag];
                    next;
                }
                last if ( $tokens[$token_flag]->isa('PPI::Token::Structure') );
                if ( $tokens[$token_flag]->isa('PPI::Token::Operator') ) {
                    my $op2 = $tokens[$token_flag]->content;
                    unless ( $op2 eq '+' or $op2 eq '-' or $op2 eq '*' or $op2 eq '/' ) {
                        last;
                    }
                }
                last unless ( $tokens[$token_flag] );
                push @next_full_tokens, $tokens[$token_flag];
            }
            # remove last space
            pop @next_full_tokens if ( $next_full_tokens[-1]->isa('PPI::Token::Whitespace'));
            $token_flag = $orginal_flag; # roll back
            # get prev tokens
            my (@prev_full_tokens);
            while ($token_flag--) {
                if ($tokens[$token_flag]->isa('PPI::Token::Whitespace') ) {
                    unshift @prev_full_tokens, $tokens[$token_flag];
                    next;
                }
                last if ($tokens[$token_flag]->isa('PPI::Token::Structure'));
                if ( $tokens[$token_flag]->isa('PPI::Token::Operator') ) {
                    my $op2 = $tokens[$token_flag]->content;
                    unless ( $op2 eq '+' or $op2 eq '-' or $op2 eq '*' or $op2 eq '/' ) {
                        last;
                    }
                }
                last unless ( $tokens[$token_flag] );
                unshift @prev_full_tokens, $tokens[$token_flag];
            }
            $token_flag = $orginal_flag; # roll back
            # remove first space
            shift @prev_full_tokens if ( $prev_full_tokens[0]->isa('PPI::Token::Whitespace'));

            # only do-able for number, space, operator
            my $do_able = 1;
            $do_able = 0 unless (scalar @prev_full_tokens and scalar @next_full_tokens);
            if ( $do_able ) {
				foreach ( @prev_full_tokens, @next_full_tokens ) {
					unless ( $_->isa('PPI::Token::Whitespace') or $_->isa('PPI::Token::Number') or
						( $_->isa('PPI::Token::Operator') and $_->content =~ /^[\+\-\*\/]$/ ) ) {
							$do_able = 0;
							last;
					}
				}
			}