I don't know of any module that provides this, but it doesn't seem like it would be that hard to implement.

Oh what the heck, Something like this perhaps? (Could probably use some further testing.)

UPDATE: fixed missing \a (bell) handling.

use warnings;
use strict;
use Test;


my ($linecount, $current_col, $tab) = (0, 0, 4);

sub pr {
    for my $string (@_){
        print $string;
        my $lines += () = $string =~ /[\n\r]/g;
        $current_col = 0 if $lines;
        $linecount += $lines;
        $string =~ s/.*[\n\r](.*)$/$1/sg;
        $string =~ s/\t/' ' x $tab/eg;
        my $bs = $string =~ tr/\b//;
        my $bell = $string =~ tr/\a//;
        $current_col += (length $string) - $bs * 2 - $bell;
        $current_col = 0 if $current_col < 0;
        $linecount += int($current_col / 80);
        $current_col %= 80;
    }    
}

BEGIN { plan tests => 24 };

my @tests = (
["1234567890", 0, 10],
["12345\n67890", 1, 5],
["12345\n67890\n12345", 2, 5],
["12345\r67890", 1, 5],
["12345\r67890\r12345", 2, 5],
["12345\t67890", 0, 10 + $tab],
["1234567890\b\b\b\b\b", 0, 5],
[qw/1234567890 1234567890 1234567890 1234567890 1234567890/, 0, 50],
["1234567890" x 10, 1, 20],
["1234567890" x 100, 12, 40],
["1234567890" x 100, "\b" x 50, 12, 0],
["1\b2\b3\b4\b5\b6\b7\b8\b9\b0\b\n12345\t67890\n\t12345\b\b\b\b\b67890
+\t", 2, 5 + $tab*2],
["1234567890\a\b\a\b\a\b", 0, 7],
);

for my $test (@tests){
    ( $linecount, $current_col ) = ( 0, 0 );
    my @strings = @$test;
    splice @strings, -2, 2, '';
    pr $_ for @strings;
    print "<--\n";
    ok($linecount, $test->[-2], "Linecount incorrect");
    ok($current_col, $test->[-1], "Column count incorrect");
}

[download]

In reply to Re: scalar or sub that can tell me the terminal print offset ? by thundergnat
in thread scalar or sub that can tell me the terminal print offset ? by palkia

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