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- package Text::Wrap;
-
- require Exporter;
-
- @ISA = qw(Exporter);
- @EXPORT = qw(wrap fill);
- @EXPORT_OK = qw($columns $break $huge);
-
- $VERSION = 2005.0824_01;
-
- use vars qw($VERSION $columns $debug $break $huge $unexpand $tabstop
- $separator $separator2);
- use strict;
-
- BEGIN {
- $columns = 76; # <= screen width
- $debug = 0;
- $break = '\s';
- $huge = 'wrap'; # alternatively: 'die' or 'overflow'
- $unexpand = 1;
- $tabstop = 8;
- $separator = "\n";
- $separator2 = undef;
- }
-
- use Text::Tabs qw(expand unexpand);
-
- sub wrap
- {
- my ($ip, $xp, @t) = @_;
-
- local($Text::Tabs::tabstop) = $tabstop;
- my $r = "";
- my $tail = pop(@t);
- my $t = expand(join("", (map { /\s+\z/ ? ( $_ ) : ($_, ' ') } @t), $tail));
- my $lead = $ip;
- my $ll = $columns - length(expand($ip)) - 1;
- $ll = 0 if $ll < 0;
- my $nll = $columns - length(expand($xp)) - 1;
- my $nl = "";
- my $remainder = "";
-
- use re 'taint';
-
- pos($t) = 0;
- while ($t !~ /\G\s*\Z/gc) {
- if ($t =~ /\G([^\n]{0,$ll})($break|\n*\z)/xmgc) {
- $r .= $unexpand
- ? unexpand($nl . $lead . $1)
- : $nl . $lead . $1;
- $remainder = $2;
- } elsif ($huge eq 'wrap' && $t =~ /\G([^\n]{$ll})/gc) {
- $r .= $unexpand
- ? unexpand($nl . $lead . $1)
- : $nl . $lead . $1;
- $remainder = defined($separator2) ? $separator2 : $separator;
- } elsif ($huge eq 'overflow' && $t =~ /\G([^\n]*?)($break|\z)/xmgc) {
- $r .= $unexpand
- ? unexpand($nl . $lead . $1)
- : $nl . $lead . $1;
- $remainder = $2;
- } elsif ($huge eq 'die') {
- die "couldn't wrap '$t'";
- } else {
- die "This shouldn't happen";
- }
-
- $lead = $xp;
- $ll = $nll;
- $nl = defined($separator2)
- ? ($remainder eq "\n"
- ? "\n"
- : $separator2)
- : $separator;
- }
- $r .= $remainder;
-
- print "-----------$r---------\n" if $debug;
-
- print "Finish up with '$lead'\n" if $debug;
-
- $r .= $lead . substr($t, pos($t), length($t)-pos($t))
- if pos($t) ne length($t);
-
- print "-----------$r---------\n" if $debug;;
-
- return $r;
- }
-
- sub fill
- {
- my ($ip, $xp, @raw) = @_;
- my @para;
- my $pp;
-
- for $pp (split(/\n\s+/, join("\n",@raw))) {
- $pp =~ s/\s+/ /g;
- my $x = wrap($ip, $xp, $pp);
- push(@para, $x);
- }
-
- # if paragraph_indent is the same as line_indent,
- # separate paragraphs with blank lines
-
- my $ps = ($ip eq $xp) ? "\n\n" : "\n";
- return join ($ps, @para);
- }
-
- 1;
- __END__
-
-