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1 | use strict; |
2 | use warnings; |
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3 | package Devel::REPL::Plugin::History; |
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4 | # ABSTRACT: Keep track of all input, provide shortcuts !1, !-1 |
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5 | |
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6 | our $VERSION = '1.003029'; |
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7 | |
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8 | use Devel::REPL::Plugin; |
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9 | use namespace::autoclean; |
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10 | |
11 | has 'history' => ( |
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12 | isa => 'ArrayRef', is => 'rw', |
13 | lazy => 1, |
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14 | default => sub { [] } |
15 | ); |
16 | |
17 | # lazy so ReadLineHistory Plugin can set this |
18 | has 'have_readline_history' => ( |
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19 | is => 'rw', |
20 | lazy => 1, |
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21 | default => sub { 0 } |
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22 | ); |
23 | |
24 | sub push_history { |
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25 | my ($self, $line) = @_; |
26 | # Push history is not needed if we have Term::ReadLine |
27 | # support. We put the test inside push_history() in case |
28 | # someone has modified it in their code. |
29 | if ($self->have_readline_history) { |
30 | # update history to keep consistent with Term::ReadLine |
31 | $self->history( [ $self->term->GetHistory ] ); |
32 | } else { |
33 | # not used with Term::ReadLine history support |
34 | push(@{$self->history}, $line); |
35 | } |
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36 | } |
37 | |
38 | around 'read' => sub { |
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39 | my $orig = shift; |
40 | my ($self, @args) = @_; |
41 | my $line = $self->$orig(@args); |
42 | if (defined $line) { |
43 | if ($line =~ m/^!(.*)$/) { |
44 | my $call = $1; |
45 | $line = $self->history_call($call); |
46 | if (defined $line) { |
47 | $self->print($line."\n"); |
48 | } else { |
49 | return "'Unable to find ${call} in history'"; |
50 | } |
51 | } |
52 | if ($line =~ m/\S/) { |
53 | $self->push_history($line); |
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54 | } |
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55 | } |
56 | return $line; |
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57 | }; |
58 | |
59 | sub history_call { |
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60 | my ($self, $call) = @_; |
61 | if ($call =~ m/^(-?\d+)$/) { # handle !1 or !-1 |
62 | my $idx = $1; |
63 | $idx-- if ($idx > 0); # !1 gets history element 0 |
64 | my $line = $self->history->[$idx]; |
65 | return $line; |
66 | } |
67 | my $re = qr/^\Q${call}\E/; |
68 | foreach my $line (reverse @{$self->history}) { |
69 | return $line if ($line =~ $re); |
70 | } |
71 | return; |
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72 | }; |
73 | |
74 | 1; |