home *** CD-ROM | disk | FTP | other *** search
- package Text::Wrap;
-
- require Exporter;
-
- @ISA = (Exporter);
- @EXPORT = qw(wrap);
- @EXPORT_OK = qw($columns);
-
- $VERSION = 97.011701;
-
- use vars qw($VERSION $columns $debug);
- use strict;
-
- BEGIN {
- $columns = 76; # <= screen width
- $debug = 0;
- }
-
- use Text::Tabs qw(expand unexpand);
-
- sub wrap
- {
- my ($ip, $xp, @t) = @_;
-
- my $r = "";
- my $t = expand(join(" ",@t));
- my $lead = $ip;
- my $ll = $columns - length(expand($lead)) - 1;
- my $nl = "";
-
- # remove up to a line length of things that aren't
- # new lines and tabs.
-
- if ($t =~ s/^([^\n]{0,$ll})(\s|\Z(?!\n))//xm) {
-
- # accept it.
- $r .= unexpand($lead . $1);
-
- # recompute the leader
- $lead = $xp;
- $ll = $columns - length(expand($lead)) - 1;
- $nl = $2;
-
- # repeat the above until there's none left
- while ($t) {
- if ( $t =~ s/^([^\n]{0,$ll})(\s|\Z(?!\n))//xm ) {
- print "\$2 is '$2'\n" if $debug;
- $nl = $2;
- $r .= unexpand("\n" . $lead . $1);
- } elsif ($t =~ s/^([^\n]{$ll})//) {
- $nl = "\n";
- $r .= unexpand("\n" . $lead . $1);
- }
- }
- $r .= $nl;
- }
-
- die "couldn't wrap '$t'"
- if length($t) > $ll;
-
- print "-----------$r---------\n" if $debug;
-
- print "Finish up with '$lead', '$t'\n" if $debug;
-
- $r .= $lead . $t if $t ne "";
-
- print "-----------$r---------\n" if $debug;;
- return $r;
- }
-
- 1;
- __END__
-
- =head1 NAME
-
- Text::Wrap - line wrapping to form simple paragraphs
-
- =head1 SYNOPSIS
-
- use Text::Wrap
-
- print wrap($initial_tab, $subsequent_tab, @text);
-
- use Text::Wrap qw(wrap $columns);
-
- $columns = 132;
-
- =head1 DESCRIPTION
-
- Text::Wrap::wrap() is a very simple paragraph formatter. It formats a
- single paragraph at a time by breaking lines at word boundries.
- Indentation is controlled for the first line ($initial_tab) and
- all subsquent lines ($subsequent_tab) independently. $Text::Wrap::columns
- should be set to the full width of your output device.
-
- =head1 EXAMPLE
-
- print wrap("\t","","This is a bit of text that forms
- a normal book-style paragraph");
-
- =head1 BUGS
-
- It's not clear what the correct behavior should be when Wrap() is
- presented with a word that is longer than a line. The previous
- behavior was to die. Now the word is split at line-length.
-
- =head1 AUTHOR
-
- David Muir Sharnoff <muir@idiom.com> with help from Tim Pierce and
- others.
-
- =cut
-
- Latest change by Andreas Koenig <k@anna.in-berlin.de> - 1/17/97
-
- print fill($initial_tab, $subsequent_tab, @text);
-
- print fill("", "", `cat book`);
-
- Text::Wrap::fill() is a simple multi-paragraph formatter. It formats
- each paragraph separately and then joins them together when it's done. It
- will destory any whitespace in the original text. It breaks text into
- paragraphs by looking for whitespace after a newline. In other respects
- it acts like wrap().
-
- # Tim Pierce did a faster version of this:
-
- sub fill
- {
- my ($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);
- }
-
-