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package Devel::REPL::Plugin::Completion;
use Devel::REPL::Plugin;
use Scalar::Util 'weaken';
use PPI;
use namespace::clean -except => [ 'meta' ];
has current_matches => (
is => 'rw',
isa => 'ArrayRef',
lazy => 1,
default => sub { [] },
);
has match_index => (
is => 'rw',
isa => 'Int',
lazy => 1,
default => sub { 0 },
);
sub BEFORE_PLUGIN {
my ($self) = @_;
my $weakself = $self;
weaken($weakself);
$self->term->Attribs->{attempted_completion_function} = sub {
$weakself->_completion(@_);
};
}
sub _completion {
my ($self, $text, $line, $start, $end) = @_;
# we're discarding everything after the cursor for completion purposes
# we can't just use $text because we want all the code before the cursor to
# matter, not just the current word
substr($line, $end) = '';
my $document = PPI::Document->new(\$line);
return unless defined($document);
$document->prune('PPI::Token::Whitespace');
my @matches = $self->complete($text, $document);
# iterate through the completions
return $self->term->completion_matches($text, sub {
my ($text, $state) = @_;
if (!$state) {
$self->current_matches(\@matches);
$self->match_index(0);
}
else {
$self->match_index($self->match_index + 1);
}
return $self->current_matches->[$self->match_index];
});
}
sub complete {
return ();
}
1;
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