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- package Text::Wrap;
-
- use vars qw(@ISA @EXPORT @EXPORT_OK $VERSION $columns $debug);
- use strict;
- use Exporter;
-
- $VERSION = "97.02";
- @ISA = qw(Exporter);
- @EXPORT = qw(wrap);
- @EXPORT_OK = qw($columns $tabstop fill);
-
- use Text::Tabs qw(expand unexpand $tabstop);
-
-
- BEGIN {
- $columns = 76; # <= screen width
- $debug = 0;
- }
-
- sub wrap
- {
- my ($ip, $xp, @t) = @_;
-
- my @rv;
- my $t = expand(join(" ",@t));
-
- my $lead = $ip;
- my $ll = $columns - length(expand($lead)) - 1;
- my $nl = "";
-
- $t =~ s/^\s+//;
- while(length($t) > $ll) {
- # remove up to a line length of things that
- # aren't new lines and tabs.
- if ($t =~ s/^([^\n]{0,$ll})(\s|\Z(?!\n))//) {
- my ($l,$r) = ($1,$2);
- $l =~ s/\s+$//;
- print "WRAP $lead$l..($r)\n" if $debug;
- push @rv, unexpand($lead . $l), "\n";
-
- } elsif ($t =~ s/^([^\n]{$ll})//) {
- print "SPLIT $lead$1..\n" if $debug;
- push @rv, unexpand($lead . $1),"\n";
- }
- # recompute the leader
- $lead = $xp;
- $ll = $columns - length(expand($lead)) - 1;
- $t =~ s/^\s+//;
- }
- print "TAIL $lead$t\n" if $debug;
- push @rv, $lead.$t if $t ne "";
- return join '', @rv;
- }
-
-
- sub fill
- {
- my ($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, $x);
- }
-
- # if paragraph_indent is the same as line_indent,
- # separate paragraphs with blank lines
-
- return join ($ip eq $xp ? "\n\n" : "\n", @para);
- }
-
- 1;
- __END__
-
- =head1 NAME
-
- Text::Wrap - line wrapping to form simple paragraphs
-
- =head1 SYNOPSIS
-
- use Text::Wrap
-
- print wrap($initial_tab, $subsequent_tab, @text);
-
- use Text::Wrap qw(wrap $columns $tabstop fill);
-
- $columns = 132;
- $tabstop = 4;
-
- print fill($initial_tab, $subsequent_tab, @text);
- print fill("", "", `cat book`);
-
- =head1 DESCRIPTION
-
- Text::Wrap::wrap() is a very simple paragraph formatter. It formats a
- single paragraph at a time by breaking lines at word boundries.
- Indentation is controlled for the first line ($initial_tab) and
- all subsquent lines ($subsequent_tab) independently. $Text::Wrap::columns
- should be set to the full width of your output device.
-
- Text::Wrap::fill() is a simple multi-paragraph formatter. It formats
- each paragraph separately and then joins them together when it's done. It
- will destory any whitespace in the original text. It breaks text into
- paragraphs by looking for whitespace after a newline. In other respects
- it acts like wrap().
-
- =head1 EXAMPLE
-
- print wrap("\t","","This is a bit of text that forms
- a normal book-style paragraph");
-
- =head1 BUGS
-
- It's not clear what the correct behavior should be when Wrap() is
- presented with a word that is longer than a line. The previous
- behavior was to die. Now the word is now split at line-length.
-
- =head1 AUTHOR
-
- David Muir Sharnoff <muir@idiom.com> with help from Tim Pierce and
- others. Updated by Jacqui Caren.
-
- =cut
-