package Devel::REPL::Plugin::Completion;
-
-use Moose::Role;
+use Devel::REPL::Plugin;
+use Scalar::Util 'weaken';
+use PPI;
use namespace::clean -except => [ 'meta' ];
-# push the given string in the completion list
-sub push_completion
-{
- my ($self, $string) = @_;
- $self->term->Attribs->{completion_entry_function} =
- $self->term->Attribs->{list_completion_function};
- push @{$self->term->Attribs->{completion_word}}, $string;
-};
-
-# return the namespace of the module given
-sub get_namespace
-{
- my ($self, $module) = @_;
- my $namespace;
- eval '$namespace = \%'.$module.'::';
- return $namespace;
+has current_matches => (
+ is => 'rw',
+ isa => 'ArrayRef',
+ lazy => 1,
+ default => sub { [] },
+);
+
+has match_index => (
+ is => 'rw',
+ isa => 'Int',
+ lazy => 1,
+ default => sub { 0 },
+);
+
+sub BEFORE_PLUGIN {
+ my ($self) = @_;
+
+ my $weakself = $self;
+ weaken($weakself);
+
+ $self->term->Attribs->{attempted_completion_function} = sub {
+ $weakself->_completion(@_);
+ };
}
-# we wrap the run method to init the completion list
-# with filenames found in the current dir and init
-# the completion list.
-# yes, this is our 'init the plugin' stuff actually
-sub BEFORE_PLUGIN
-{
- my ($self) = @_;
- # set the completion function
- $self->term->Attribs->{completion_entry_function} =
- $self->term->Attribs->{list_completion_function};
-
- # init the completion with an arrayref (could be the Perl built-ins)
- $self->term->Attribs->{completion_word} = [];
-
- # now put each file in curdir in the completion list
- my $curdir = File::Spec->curdir();
- if (opendir(CURDIR, $curdir)) {
- while (my $file = readdir(CURDIR)) {
- next if $file =~ /^\.+$/; # we skip "." and ".."
- $self->push_completion($file);
- }
+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);
}
- closedir(CURDIR);
+
+ return $self->current_matches->[$self->match_index];
+ });
}
-# wrap the read method so we save in the completion list
-# each variable declaration
-around 'read' => sub {
- my $orig = shift;
- my ($self, @args) = @_;
- my $line = $self->$orig(@args);
- if (defined $line) {
- if ($line =~ /\s*[\$\%\@](\S+)\s*=/) {
- my $str = $1;
- $self->push_completion($str);
- }
- }
- return $line;
-};
-
-# wrap the eval one to catch each 'use' statement in order to
-# load the namespace in the completion list (module functions and friends)
-# we do that around the eval method cause we want the module to be actually loaded.
-around 'eval' => sub {
- my $orig = shift;
- my ($self, $line) = @_;
- my @ret = $self->$orig($line);
- if ($line =~ /use\s+(\S+)/) {
- my $module = $1;
- foreach my $keyword (keys %{$self->get_namespace($module)}) {
- $self->push_completion($keyword);
- }
- }
- return @ret;
-};
+sub complete {
+ return ();
+}
1;
+