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#! perl |
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|
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# this extension implements scrollback buffer search |
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|
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#:META:X_RESOURCE:%:string:activation hotkey keysym |
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|
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=head1 NAME |
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|
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searchable-scrollback<hotkey> - incremental scrollback search (enabled by default) |
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|
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=head1 DESCRIPTION |
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|
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Adds regex search functionality to the scrollback buffer, triggered |
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by a hotkey (default: C<M-s>). While in search mode, normal terminal |
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input/output is suspended and a regex is displayed at the bottom of the |
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screen. |
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|
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Inputting characters appends them to the regex and continues incremental |
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search. C<BackSpace> removes a character from the regex, C<Up> and C<Down> |
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search upwards/downwards in the scrollback buffer, C<End> jumps to the |
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bottom. C<Escape> leaves search mode and returns to the point where search |
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was started, while C<Enter> or C<Return> stay at the current position and |
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additionally stores the first match in the current line into the primary |
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selection if the C<Shift> modifier is active. |
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|
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The regex defaults to "(?i)", resulting in a case-insensitive search. To |
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get a case-sensitive search you can delete this prefix using C<BackSpace> |
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or simply use an uppercase character which removes the "(?i)" prefix. |
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|
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See L<perlre> for more info about perl regular expression syntax. |
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|
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=cut |
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|
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sub on_init { |
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my ($self) = @_; |
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|
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my $hotkey = $self->{argv}[0] |
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|| $self->x_resource ("%") |
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|| "M-s"; |
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|
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$self->parse_keysym ($hotkey, "perl:searchable-scrollback:start") |
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or warn "unable to register '$hotkey' as scrollback search start hotkey\n"; |
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|
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() |
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} |
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|
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sub on_user_command { |
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my ($self, $cmd) = @_; |
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|
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$cmd eq "searchable-scrollback:start" |
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and $self->enter; |
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|
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() |
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} |
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|
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sub msg { |
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my ($self, $msg) = @_; |
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|
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$self->{overlay} = $self->overlay (0, -1, $self->ncol, 1, urxvt::OVERLAY_RSTYLE, 0); |
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$self->{overlay}->set (0, 0, $self->special_encode ($msg)); |
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} |
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|
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sub enter { |
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my ($self) = @_; |
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|
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return if $self->{overlay}; |
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|
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$self->{view_start} = $self->view_start; |
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$self->{pty_ev_events} = $self->pty_ev_events (urxvt::EV_NONE); |
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$self->{row} = $self->nrow - 1; |
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$self->{search} = "(?i)"; |
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|
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$self->enable ( |
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key_press => \&key_press, |
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tt_write => \&tt_write, |
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refresh_begin => \&refresh, |
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refresh_end => \&refresh, |
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); |
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|
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$self->{manpage_overlay} = $self->overlay (0, -2, $self->ncol, 1, urxvt::OVERLAY_RSTYLE, 0); |
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$self->{manpage_overlay}->set (0, 0, "scrollback search, see the ${urxvt::RXVTNAME}perl manpage for details"); |
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|
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$self->idle; |
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} |
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|
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sub leave { |
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my ($self) = @_; |
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|
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$self->disable ("key_press", "tt_write", "refresh_begin", "refresh_end"); |
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$self->pty_ev_events ($self->{pty_ev_events}); |
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|
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delete $self->{manpage_overlay}; |
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delete $self->{overlay}; |
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delete $self->{history}; |
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delete $self->{search}; |
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} |
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|
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sub idle { |
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my ($self) = @_; |
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|
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$self->msg ("(escape cancels) /$self->{search}█"); |
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} |
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|
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sub search { |
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my ($self, $dir) = @_; |
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|
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delete $self->{found}; |
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my $row = $self->{row}; |
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|
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my $search = $self->special_encode ($self->{search}); |
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|
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no re 'eval'; # just to be sure |
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if (my $re = eval { qr/$search/ }) { |
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while ($self->nrow > $row && $row >= $self->top_row) { |
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my $line = $self->line ($row) |
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or last; |
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|
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my $text = $line->t; |
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if ($text =~ /$re/g) { |
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do { |
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push @{ $self->{found} }, [$line->coord_of ($-[0]), $line->coord_of ($+[0])]; |
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} while $text =~ /$re/g; |
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|
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$self->{row} = $row; |
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$self->view_start (List::Util::min 0, $row - ($self->nrow >> 1)); |
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$self->want_refresh; |
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last; |
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} |
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|
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$row = $dir < 0 ? $line->beg - 1 : $line->end + 1; |
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} |
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} |
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|
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$self->scr_bell unless $self->{found}; |
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} |
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|
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sub refresh { |
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my ($self) = @_; |
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|
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return unless $self->{found}; |
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|
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my $xor = urxvt::RS_RVid | urxvt::RS_Blink; |
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for (@{ $self->{found} }) { |
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$self->scr_xor_span (@$_, $xor); |
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$xor = urxvt::RS_RVid; |
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} |
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|
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() |
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} |
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|
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sub key_press { |
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my ($self, $event, $keysym, $string) = @_; |
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|
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delete $self->{manpage_overlay}; |
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|
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if ($keysym == 0xff0d || $keysym == 0xff8d) { # enter |
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if ($self->{found} && $event->{state} & urxvt::ShiftMask) { |
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my ($br, $bc, $er, $ec) = @{ $self->{found}[0] }; |
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$self->selection_beg ($br, $bc); |
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$self->selection_end ($er, $ec); |
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$self->selection_make ($event->{time}); |
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} |
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$self->leave; |
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} elsif ($keysym == 0xff1b) { # escape |
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$self->view_start ($self->{view_start}); |
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$self->leave; |
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} elsif ($keysym == 0xff57) { # end |
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$self->{row} = $self->nrow - 1; |
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$self->view_start (0); |
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} elsif ($keysym == 0xff52) { # up |
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$self->{row}-- if $self->{row} > $self->top_row; |
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$self->search (-1); |
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} elsif ($keysym == 0xff54) { # down |
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$self->{row}++ if $self->{row} < $self->nrow; |
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$self->search (+1); |
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} elsif ($keysym == 0xff08) { # backspace |
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substr $self->{search}, -1, 1, ""; |
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$self->search; |
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$self->idle; |
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} elsif ($string !~ /[\x00-\x1f\x80-\xaf]/) { |
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return; # pass to tt_write |
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} |
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|
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1 |
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} |
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|
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sub tt_write { |
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my ($self, $data) = @_; |
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|
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$self->{search} .= $self->locale_decode ($data); |
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|
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$self->{search} =~ s/^\(\?i\)// |
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if $self->{search} =~ /^\(.*[[:upper:]]/; |
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|
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$self->search (-1); |
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$self->idle; |
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|
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1 |
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} |
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|
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|
