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use strict; |
use strict; |
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use Term::Screen; |
use Term::Screen; |
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use Carp qw/confess/; |
use Carp qw/cluck/; |
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use Data::Dump qw/dump/; |
use Data::Dump qw/dump/; |
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my $data = <<'EOF'; |
my $data = <<'EOF'; |
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} |
} |
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close($ps); |
close($ps); |
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$data .= "\n--EOF--"; |
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my $scr; |
my $scr; |
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# leave sane terminal if script dies |
# leave sane terminal if script dies |
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my @lines = split(/\n/, $data); |
my @lines = split(/\n/, $data); |
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my $o = 0; # offset in original text |
my $top_screen_line = 0; # offset in original text |
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my $pos = 0; |
my $pos = 0; |
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# default: select first line |
# default: select first line |
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sub chunk { |
sub chunk { |
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my $t = shift; |
my $t = shift; |
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return unless length($t) > 2; |
cluck "expected line" unless defined $t; |
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return substr($t,1,$scr->cols); |
return substr($t,0,$scr->cols); |
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} |
} |
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sub redraw_line { |
sub redraw_line { |
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sub redraw { |
sub redraw { |
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for my $l (0 .. $scr->rows - 3) { |
for my $l (0 .. $scr->rows - 3) { |
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my $line = $lines[ $l + $o ]; |
my $line = $lines[ $l + $top_screen_line ]; |
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next if (length($line) < 2); |
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redraw_line( $l, $line ); |
redraw_line( $l, $line ); |
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last if ($l == $#lines); |
last if ($l == $#lines); |
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} |
} |
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selected(0); |
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} |
} |
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sub status { |
sub status { |
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sub selected { |
sub selected { |
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my $d = shift || 0; |
my $d = shift || 0; |
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my $screen_line = $pos - $o; |
my $screen_line = $pos - $top_screen_line; |
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redraw_line( $screen_line, $lines[$pos] ); |
redraw_line( $screen_line, $lines[$pos] ); |
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if ( $d < 0 && $screen_line == 0 ) { |
if ( $d < 0 && $screen_line == 0 ) { |
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if ( $pos > 0 ) { |
if ( $pos > 0 ) { |
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$o--; |
$top_screen_line--; |
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$pos--; |
$pos--; |
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} else { |
} else { |
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$error_text = "Already at Begin."; |
$error_text = "Already at Begin."; |
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} |
} |
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redraw; |
redraw; |
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} elsif ( $d > 0 && $screen_line == $last_screen_line ) { |
} elsif ( $d > 0 && $screen_line == $last_screen_line ) { |
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if ( $pos <= $#lines ) { |
if ( $pos < $#lines ) { |
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$o++; |
$top_screen_line++; |
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$pos++; |
$pos++; |
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} else { |
} else { |
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$error_text = "Already at End."; |
$error_text = "Already at End."; |
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my $line = $lines[$pos]; |
my $line = $lines[$pos]; |
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if ( defined $selectable_line->{ $pos } ) { |
if ( defined $selectable_line->{ $pos } ) { |
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$scr->at($pos - $o,0)->reverse->bold()->puts( full_line( chunk($line) ) )->normal(); |
$scr->at($pos - $top_screen_line,0)->reverse->bold()->puts( full_line( chunk($line) ) )->normal(); |
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$sel_pos = $pos; |
$sel_pos = $pos; |
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} else { |
} else { |
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$scr->at($pos - $o,0)->reverse->puts( full_line( chunk($line) ) ); |
$scr->at($pos - $top_screen_line,0)->reverse->puts( full_line( chunk($line) ) ); |
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$sel_pos = -1; |
$sel_pos = -1; |
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} |
} |
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status; |
status; |
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$error_text = ""; |
$error_text = ""; |
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my $lines_on_screen = $scr->rows - 3; |
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if ($key eq 'ku') { |
if ($key eq 'ku') { |
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selected( -1 ); |
selected( -1 ); |
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} elsif ($key eq 'kd') { |
} elsif ($key eq 'kd') { |
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selected( +1 ); |
selected( +1 ); |
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} elsif ($key eq 'pgup' ) { |
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# first line on screen? |
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if ( $pos == $top_screen_line ) { |
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$top_screen_line -= $lines_on_screen; |
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$top_screen_line = 0 if $top_screen_line < 0; |
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redraw; |
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} |
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selected( -( $pos - $top_screen_line ) ); |
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} elsif ($key eq 'pgdn' ) { |
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# last line on screen? |
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if ( $pos - $top_screen_line == $lines_on_screen ) { |
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$top_screen_line += $lines_on_screen; |
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$top_screen_line = $#lines - $lines_on_screen if $top_screen_line >= $#lines - $lines_on_screen; |
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redraw; |
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} |
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selected( $top_screen_line + $lines_on_screen - $pos ); |
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} |
} |
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$status_text = sprintf("pos: %-3d sel_pos: %-3d top offset: %-3d", $pos, $sel_pos, $o ); |
$status_text = sprintf("pos: %-3d sel_pos: %-3d top_screen_line: %-3d", $pos, $sel_pos, $top_screen_line ); |
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if ( length($key) > 1 ) { |
if ( length($key) > 1 ) { |
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$status_text .= " key: $key"; |
$status_text .= " key: $key"; |
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} else { |
} else { |
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status; |
status; |
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redraw if lc($key) eq 'r'; |
# CTRL+L |
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redraw if ord($key) eq 0x0c; |
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exit if (lc($key) eq 'q'); |
exit if (lc($key) eq 'q'); |
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} |
} |