| Commit | Line | Data |
|---|
| 4633a7c4 |
1 | package Text::Wrap; |
| 2 | |
| 4633a7c4 |
3 | require Exporter; |
| 4 | |
| 5 | @ISA = (Exporter); |
| 6 | @EXPORT = qw(wrap); |
| 7 | @EXPORT_OK = qw($columns); |
| 8 | |
| b1a524cb |
9 | $VERSION = 96.041801; |
| 10 | |
| 11 | use vars qw($VERSION $columns $debug); |
| 12 | use strict; |
| 13 | |
| 4633a7c4 |
14 | BEGIN { |
| b1a524cb |
15 | $columns = 76; # <= screen width |
| 16 | $debug = 0; |
| 4633a7c4 |
17 | } |
| 18 | |
| 19 | use Text::Tabs; |
| 20 | use strict; |
| 21 | |
| 22 | sub wrap |
| 23 | { |
| 24 | my ($ip, $xp, @t) = @_; |
| 25 | |
| b1a524cb |
26 | my $r = ""; |
| 4633a7c4 |
27 | my $t = expand(join(" ",@t)); |
| 28 | my $lead = $ip; |
| b1a524cb |
29 | my $ll = $columns - length(expand($lead)) - 1; |
| 30 | my $nl = ""; |
| 31 | |
| 32 | # remove up to a line length of things that aren't |
| 33 | # new lines and tabs. |
| 34 | |
| 35 | if ($t =~ s/^([^\n]{0,$ll})(\s|\Z(?!\n))//xm) { |
| 36 | |
| 37 | # accept it. |
| 38 | $r .= unexpand($lead . $1); |
| 39 | |
| 40 | # recompute the leader |
| 4633a7c4 |
41 | $lead = $xp; |
| b1a524cb |
42 | $ll = $columns - length(expand($lead)) - 1; |
| 43 | $nl = $2; |
| 44 | |
| 45 | # repeat the above until there's none left |
| 46 | while ($t and $t =~ s/^([^\n]{0,$ll})(\s|\Z(?!\n))//xm) { |
| 47 | print "\$2 is '$2'\n" if $debug; |
| 48 | $nl = $2; |
| 49 | $r .= unexpand("\n" . $lead . $1); |
| 4633a7c4 |
50 | } |
| b1a524cb |
51 | $r .= $nl; |
| 4633a7c4 |
52 | } |
| b1a524cb |
53 | |
| 4633a7c4 |
54 | die "couldn't wrap '$t'" |
| 55 | if length($t) > $ll; |
| b1a524cb |
56 | |
| 57 | print "-----------$r---------\n" if $debug; |
| 58 | |
| 59 | print "Finish up with '$lead', '$t'\n" if $debug; |
| 60 | |
| 61 | $r .= $lead . $t if $t ne ""; |
| 62 | |
| 63 | print "-----------$r---------\n" if $debug;; |
| 4633a7c4 |
64 | return $r; |
| 65 | } |
| 66 | |
| 67 | 1; |
| b1a524cb |
68 | __DATA__ |
| 69 | |
| 70 | =head1 NAME |
| 71 | |
| 72 | Text::Wrap - line wrapping to form simple paragraphs |
| 73 | |
| 74 | =head1 SYNOPSIS |
| 75 | |
| 76 | use Text::Wrap |
| 77 | |
| 78 | print wrap($initial_tab, $subsequent_tab, @text); |
| 79 | |
| 80 | use Text::Wrap qw(wrap $columns); |
| 81 | |
| 82 | $columns = 132; |
| 83 | |
| 84 | =head1 DESCRIPTION |
| 85 | |
| 86 | Text::Wrap is a very simple paragraph formatter. It formats a |
| 87 | single paragraph at a time by breaking lines at word boundries. |
| 88 | Indentation is controlled for the first line ($initial_tab) and |
| 89 | all subsquent lines ($subsequent_tab) independently. $Text::Wrap::columns |
| 90 | should be set to the full width of your output device. |
| 91 | |
| 92 | =head1 EXAMPLE |
| 93 | |
| 94 | print wrap("\t","","This is a bit of text that forms |
| 95 | a normal book-style paragraph"); |
| 96 | |
| 97 | =head1 AUTHOR |
| 98 | |
| 99 | David Muir Sharnoff <muir@idiom.com> |
| 100 | |
| 101 | =cut |
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