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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/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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First line |
First line |
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+first selectable |
{s}first selectable |
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+ second selectable |
{s}second selectable |
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a space.... |
a space.... |
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...infinity and beyond |
...infinity and beyond |
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+foo |
{s}foo |
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+bar |
{s}bar |
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bum |
bum |
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EOF |
EOF |
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open(my $ps, "ps ax |") || die "can't do ps ax: $!"; |
open(my $ps, "ps ax |") || die "can't do ps ax: $!"; |
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while(<$ps>) { |
while(<$ps>) { |
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$data .= '+'.$_; |
$data .= '{s}'.$_; |
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$data .= ' '.$_; |
$data .= $_; |
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} |
} |
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close($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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my $status_text = ''; |
my $status_text = ''; |
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my $error_text = ''; |
my $error_text = ''; |
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my $status_lines = 3; |
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# find which lines are selectable in input file |
# find which lines are selectable in input file |
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my $selectable_line; |
my $selectable_line; |
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for my $l (0 .. $#lines) { |
for my $l (0 .. $#lines) { |
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next if (length($lines[$l]) < 2); |
if ($lines[$l] =~ s/^{s}//) { |
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my $foo = ' '; |
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if ($lines[$l] !~ m/^\s/o) { |
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$selectable_line->{$l}++; |
$selectable_line->{$l}++; |
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$foo = '*'; |
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} |
} |
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warn "$l: $foo $lines[$l]\n"; |
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} |
} |
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# select first selectable line |
# select first selectable line |
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if ( $selectable_line ) { |
if ( $selectable_line ) { |
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$sel_pos = (sort keys %$selectable_line)[0]; |
$pos = $sel_pos = (sort { $a <=> $b } keys %$selectable_line)[0]; |
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warn "selected first selectable line $pos"; |
warn "selected first selectable line $sel_pos"; |
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} |
} |
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sub full_line { |
sub full_line { |
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my $t = shift; |
my $t = shift; |
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my $l = length($t); |
$t = '' unless defined $t; |
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return $t . (" " x ($scr->cols - length($t))); |
return $t . (" " x ($scr->cols - length($t))); |
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} |
} |
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sub chunk { |
sub chunk { |
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my $t = shift; |
my $t = shift; |
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my $o = ''; |
cluck "expected line" unless defined $t; |
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$o = substr($t,1,$scr->cols) if length($t) > 1; |
return substr($t,0,$scr->cols); |
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return $o . ( ' ' x ( $scr->cols - length($o) - 1 ) ); |
} |
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sub redraw_line { |
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my ($l,$line) = @_; |
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if ( defined $selectable_line->{ $l } ) { |
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$scr->at($l,0)->bold()->puts( full_line( chunk($line) ) )->normal(); |
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} else { |
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$scr->at($l,0)->puts( full_line( chunk($line) ) ); |
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} |
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} |
} |
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sub redraw { |
sub redraw { |
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for my $l (0 .. $scr->rows) { |
for my $l (0 .. $scr->rows - $status_lines) { |
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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); |
redraw_line( $l, $line ); |
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if (substr($line,0,1) !~ m/^\s/o) { |
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$scr->at($l,0)->bold()->puts( full_line( chunk($line) ) )->normal(); |
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} else { |
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$scr->at($l,0)->puts( full_line( chunk($line) ) ); |
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} |
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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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my $pcnt = int(($pos || 0) * 100 / ($#lines || 1)); |
my $pcnt = int(($pos || 0) * 100 / ($#lines || 1)); |
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my $pos_txt = sprintf('%d, %d%% ',$pos,$pcnt); |
my $pos_txt = sprintf('%d, %d%% ',$pos,$pcnt); |
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$scr->at($scr->rows - 2,0)->reverse()->puts( |
$scr->at($scr->rows - $status_lines + 1,0)->reverse()->puts( |
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sprintf(' %-'.($scr->cols - length($pos_txt) - 2).'s ',$status_text) |
sprintf(' %-'.($scr->cols - length($pos_txt) - 2).'s ',$status_text) |
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.$pos_txt)->normal(); |
.$pos_txt)->normal(); |
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$scr->at($scr->rows - 1,0)->puts( |
$scr->at($scr->rows - $status_lines + 2,0)->puts( |
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sprintf('%-'.$scr->cols.'s', $error_text) |
sprintf('%-'.$scr->cols.'s', $error_text) |
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); |
); |
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} |
} |
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sub selected { |
sub selected { |
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my $d = shift || 0; |
my $d = shift || 0; |
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if ( $selectable_line->{ $pos } ) { |
my $screen_line = $pos - $top_screen_line; |
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$scr->at($pos-$o,0)->bold()->puts( chunk($lines[$pos]) )->normal(); |
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} else { |
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$scr->at($pos-$o,0)->puts( chunk($lines[$pos]) )->normal(); |
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} |
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$pos += $d; |
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my $max_row = $scr->rows - 3; |
redraw_line( $screen_line, $lines[$pos] ); |
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if ($pos < 1) { |
my $last_screen_line = $scr->rows - $status_lines; |
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$error_text = "Already at Begin."; |
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$pos = 0; |
if ( $d < 0 && $screen_line == 0 ) { |
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if ( $pos > 0 ) { |
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$top_screen_line--; |
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$pos--; |
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} else { |
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$error_text = "Already at Begin."; |
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} |
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redraw; |
redraw; |
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} elsif ($pos > $max_row) { |
} elsif ( $d > 0 && $screen_line == $last_screen_line ) { |
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$o = $pos - $max_row; # put selected line on last |
if ( $pos < $#lines ) { |
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$error_text = "Already at End."; |
$top_screen_line++; |
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$pos++; |
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} else { |
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$error_text = "Already at End."; |
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} |
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redraw; |
redraw; |
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} else { |
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$pos += $d; |
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} |
} |
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$scr->at($pos-$o,0)->reverse()->puts(chunk($lines[$pos]))->normal(); |
my $line = $lines[$pos]; |
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if ( defined $selectable_line->{ $pos } ) { |
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$scr->at($pos - $top_screen_line,0)->reverse->bold()->puts( full_line( chunk($line) ) )->normal(); |
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$sel_pos = $pos; |
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} else { |
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$scr->at($pos - $top_screen_line,0)->reverse->puts( full_line( chunk($line) ) ); |
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$sel_pos = -1; |
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} |
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status; |
status; |
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} |
} |
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$scr = new Term::Screen || die "can't init Term::Screen"; |
$scr = new Term::Screen || die "can't init Term::Screen"; |
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$scr->clrscr()->noecho(); |
$scr->clrscr()->noecho(); |
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$status_text = "let's see does it work?"; |
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redraw; |
redraw; |
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selected; |
selected; |
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while(my $key = $scr->getch()) { |
while(my $key = $scr->getch()) { |
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$status_text = sprintf("pos: %-3d sel_pos: %-3d", $pos, $sel_pos ); |
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if ( length($key) > 1 ) { |
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$status_text .= " key: $key"; |
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} else { |
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$status_text .= sprintf("key: %s [%03d][%02x]", $key, ord($key), ord($key) ); |
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} |
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$error_text = ""; |
$error_text = ""; |
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my $lines_on_screen = $scr->rows - $status_lines; |
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if ($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_screen_line: %-3d", $pos, $sel_pos, $top_screen_line ); |
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if ( length($key) > 1 ) { |
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$status_text .= " key: $key"; |
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} else { |
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$status_text .= sprintf("key: %s [%03d][%02x]", $key =~ m/\w/ ? $key : '?' , ord($key), ord($key) ); |
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} |
} |
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status; |
status; |
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# CTRL+L |
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redraw if ord($key) eq 0x0c; |
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exit if (lc($key) eq 'q'); |
exit if (lc($key) eq 'q'); |
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} |
} |
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