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1 | package Devel::REPL::Plugin::History; |
2 | |
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3 | use Devel::REPL::Plugin; |
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4 | use namespace::autoclean; |
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5 | |
6 | has 'history' => ( |
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7 | isa => 'ArrayRef', is => 'rw', required => 1, lazy => 1, |
8 | default => sub { [] } |
9 | ); |
10 | |
11 | # lazy so ReadLineHistory Plugin can set this |
12 | has 'have_readline_history' => ( |
13 | is => 'rw', required => 1, lazy => 1, |
14 | default => sub { 0 } |
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15 | ); |
16 | |
17 | sub push_history { |
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18 | my ($self, $line) = @_; |
19 | # Push history is not needed if we have Term::ReadLine |
20 | # support. We put the test inside push_history() in case |
21 | # someone has modified it in their code. |
22 | if ($self->have_readline_history) { |
23 | # update history to keep consistent with Term::ReadLine |
24 | $self->history( [ $self->term->GetHistory ] ); |
25 | } else { |
26 | # not used with Term::ReadLine history support |
27 | push(@{$self->history}, $line); |
28 | } |
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29 | } |
30 | |
31 | around 'read' => sub { |
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32 | my $orig = shift; |
33 | my ($self, @args) = @_; |
34 | my $line = $self->$orig(@args); |
35 | if (defined $line) { |
36 | if ($line =~ m/^!(.*)$/) { |
37 | my $call = $1; |
38 | $line = $self->history_call($call); |
39 | if (defined $line) { |
40 | $self->print($line."\n"); |
41 | } else { |
42 | return "'Unable to find ${call} in history'"; |
43 | } |
44 | } |
45 | if ($line =~ m/\S/) { |
46 | $self->push_history($line); |
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47 | } |
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48 | } |
49 | return $line; |
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50 | }; |
51 | |
52 | sub history_call { |
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53 | my ($self, $call) = @_; |
54 | if ($call =~ m/^(-?\d+)$/) { # handle !1 or !-1 |
55 | my $idx = $1; |
56 | $idx-- if ($idx > 0); # !1 gets history element 0 |
57 | my $line = $self->history->[$idx]; |
58 | return $line; |
59 | } |
60 | my $re = qr/^\Q${call}\E/; |
61 | foreach my $line (reverse @{$self->history}) { |
62 | return $line if ($line =~ $re); |
63 | } |
64 | return; |
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65 | }; |
66 | |
67 | 1; |
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68 | |
69 | __END__ |
70 | |
71 | =head1 NAME |
72 | |
73 | Devel::REPL::Plugin::History - Keep track of all input, provide shortcuts !1, !-1 |
74 | |
75 | =cut |
76 | |