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- package Text::Tabs;
-
- require Exporter;
-
- @ISA = (Exporter);
- @EXPORT = qw(expand unexpand $tabstop);
-
- use vars qw($VERSION $tabstop $debug);
- $VERSION = 2005.0824;
-
- use strict;
-
- BEGIN {
- $tabstop = 8;
- $debug = 0;
- }
-
- sub expand {
- my @l;
- my $pad;
- for ( @_ ) {
- my $s = '';
- for (split(/^/m, $_, -1)) {
- my $offs = 0;
- s{\t}{
- $pad = $tabstop - (pos() + $offs) % $tabstop;
- $offs += $pad - 1;
- " " x $pad;
- }eg;
- $s .= $_;
- }
- push(@l, $s);
- }
- return @l if wantarray;
- return $l[0];
- }
-
- sub unexpand
- {
- my (@l) = @_;
- my @e;
- my $x;
- my $line;
- my @lines;
- my $lastbit;
- for $x (@l) {
- @lines = split("\n", $x, -1);
- for $line (@lines) {
- $line = expand($line);
- @e = split(/(.{$tabstop})/,$line,-1);
- $lastbit = pop(@e);
- $lastbit = '' unless defined $lastbit;
- $lastbit = "\t"
- if $lastbit eq " "x$tabstop;
- for $_ (@e) {
- if ($debug) {
- my $x = $_;
- $x =~ s/\t/^I\t/gs;
- print "sub on '$x'\n";
- }
- s/ +$/\t/;
- }
- $line = join('',@e, $lastbit);
- }
- $x = join("\n", @lines);
- }
- return @l if wantarray;
- return $l[0];
- }
-
- 1;
- __END__
-
- sub expand
- {
- my (@l) = @_;
- for $_ (@l) {
- 1 while s/(^|\n)([^\t\n]*)(\t+)/
- $1. $2 . (" " x
- ($tabstop * length($3)
- - (length($2) % $tabstop)))
- /sex;
- }
- return @l if wantarray;
- return $l[0];
- }
-
-