1 files changed, 62 insertions, 0 deletions
diff --git a/lib/Reply/Plugin/Pager.pm b/lib/Reply/Plugin/Pager.pm
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+++ b/lib/Reply/Plugin/Pager.pm
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+package Reply::Plugin::Pager;
+use strict;
+use warnings;
+# ABSTRACT: command to automatically open long results in a pager
+
+use base 'Reply::Plugin';
+
+use Term::ReadKey;
+
+=head1 SYNOPSIS
+
+  ; .replyrc
+  [Pager]
+  pager = less
+
+=head1 DESCRIPTION
+
+This plugin notices when too much output is going to be displayed as the result
+of an expression, and automatically loads the result into a pager instead.
+
+The C<pager> option can be specified to provide a different pager to use,
+otherwise it will use the value of C<$ENV{PAGER}>.
+
+=cut
+
+sub new {
+    my $class = shift;
+    my %opts = @_;
+
+    if (defined $opts{pager}) {
+        $ENV{PAGER} = $opts{pager};
+    }
+
+    # delay this because it checks $ENV{PAGER} at load time
+    require IO::Pager;
+
+    my $self = $class->SUPER::new(@_);
+    return $self;
+}
+
+sub print_result {
+    my $self = shift;
+    my ($next, @result) = @_;
+
+    my ($cols, $rows) = GetTerminalSize;
+
+    my @lines = map { split /\n/ } @result;
+    if (@lines >= $rows - 2) {
+        IO::Pager::open(my $fh) or die "Couldn't run pager: $!";
+        $fh->print(@result, "\n");
+    }
+    else {
+        $next->(@result);
+    }
+}
+
+=for Pod::Coverage
+  print_result
+
+=cut
+
+1;