mirror of https://github.com/tongzx/nt5src
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
132 lines
2.9 KiB
132 lines
2.9 KiB
package Text::Wrap;
|
|
|
|
require Exporter;
|
|
|
|
@ISA = qw(Exporter);
|
|
@EXPORT = qw(wrap fill);
|
|
@EXPORT_OK = qw($columns $break $huge);
|
|
|
|
$VERSION = 98.112902;
|
|
|
|
use vars qw($VERSION $columns $debug $break $huge);
|
|
use strict;
|
|
|
|
BEGIN {
|
|
$columns = 76; # <= screen width
|
|
$debug = 0;
|
|
$break = '\s';
|
|
$huge = 'wrap'; # alternatively: 'die'
|
|
}
|
|
|
|
use Text::Tabs qw(expand unexpand);
|
|
|
|
sub wrap
|
|
{
|
|
my ($ip, $xp, @t) = @_;
|
|
|
|
my $r = "";
|
|
my $t = expand(join(" ",@t));
|
|
my $lead = $ip;
|
|
my $ll = $columns - length(expand($ip)) - 1;
|
|
my $nll = $columns - length(expand($xp)) - 1;
|
|
my $nl = "";
|
|
my $remainder = "";
|
|
|
|
while ($t !~ /^\s*$/) {
|
|
if ($t =~ s/^([^\n]{0,$ll})($break|\Z(?!\n))//xm) {
|
|
$r .= unexpand($nl . $lead . $1);
|
|
$remainder = $2;
|
|
} elsif ($huge eq 'wrap' && $t =~ s/^([^\n]{$ll})//) {
|
|
$r .= unexpand($nl . $lead . $1);
|
|
$remainder = "\n";
|
|
} elsif ($huge eq 'die') {
|
|
die "couldn't wrap '$t'";
|
|
} else {
|
|
die "This shouldn't happen";
|
|
}
|
|
|
|
$lead = $xp;
|
|
$ll = $nll;
|
|
$nl = "\n";
|
|
}
|
|
$r .= $remainder;
|
|
|
|
print "-----------$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 $r;
|
|
}
|
|
|
|
sub fill
|
|
{
|
|
my ($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, $subsequent_tab, @text);
|
|
print fill($initial_tab, $subsequent_tab, @text);
|
|
|
|
use Text::Wrap qw(wrap $columns $huge);
|
|
|
|
$columns = 132;
|
|
$huge = 'die';
|
|
$huge = 'wrap';
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
Text::Wrap::wrap() is a very simple paragraph formatter. It formats a
|
|
single paragraph at a time by breaking lines at word boundaries.
|
|
Indentation is controlled for the first line ($initial_tab) and
|
|
all subsequent lines ($subsequent_tab) independently.
|
|
|
|
Lines are wrapped at $Text::Wrap::columns columns.
|
|
$Text::Wrap::columns should be set to the full width of your output device.
|
|
|
|
When words that are longer than $columns are encountered, they
|
|
are broken up. Previous versions of wrap() die()ed instead.
|
|
To restore the old (dying) behavior, set $Text::Wrap::huge to
|
|
'die'.
|
|
|
|
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 destroy 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 AUTHOR
|
|
|
|
David Muir Sharnoff <[email protected]> with help from Tim Pierce and
|
|
many many others.
|
|
|