www.pudn.com > SCIgen.rar > Autoformat.pm, change:2005-04-11,size:43681b


package Autoformat;  # modified by JS: remove Text:: package 
 
# See the bottom of this file for copyright and owner information. 
# Modified by Jeremy Stribling to work with SCIgen, 2/2005. 
 
use strict; use vars qw($VERSION @ISA @EXPORT @EXPORT_OK); use Carp; 
use 5.005; 
$VERSION = '1.12'; 
 
require Exporter; 
 
# modified by JS: remove Text:: package 
use Reform qw( form tag break_at break_with break_wrap break_TeX ); 
 
@ISA = qw(Exporter); 
@EXPORT = qw( autoformat ); 
@EXPORT_OK = 
	qw( form tag break_at break_with break_wrap break_TeX ignore_headers ); 
 
 
my %ignore = map {$_=>1} qw { 
	a an at as and are 
	but by  
	ere 
	for from 
	in into is 
	of on onto or over 
	per 
	the to that than 
	until unto upon 
	via 
	with while whilst within without 
}; 
 
my @entities = qw { 
	Á   á      Â    â        Æ    æ 
	À   à      Α    α        Ã   ã 
	Ä     ä        Β     β         Ç   ç 
	Χ      χ         Δ    δ        É   é 
	Ê    ê       È   è       Ε  ε 
	Η      η         Ð      ð          Ë     ë 
	Γ    γ       Í   í       Î    î 
	Ì   ì      Ι     ι         Ï     ï 
	Κ    κ       Λ   λ       Μ       μ 
	Ñ   ñ      Ν       ν           Ó   ó 
	Ô    ô       Œ    œ        Ò   ò 
	Ω    ω       Ο  ο      Õ   õ 
	Ö     ö        Φ      φ          Π       π 
	″    ′       Ψ      ψ          Ρ      ρ 
	Š   š      Σ    σ        Τ      τ 
	Θ    θ       Þ    þ        Ú   ú 
	Û    û       Ù   ù       Υ  υ 
	Ü     ü        Ξ       ξ           Ý   ý 
	Ÿ     ÿ        Ζ     ζ          
}; 
 
my %lower_entities = @entities; 
my %upper_entities = reverse @entities; 
 
my %casing = ( 
	lower => [ \%lower_entities,  \%lower_entities, 
		   sub { $_ = lc },   sub { $_ = lc } ], 
	upper => [ \%upper_entities,  \%upper_entities, 
		   sub { $_ = uc },   sub { $_ = uc } ], 
        # modified by JS: no need to lowercase everything before the ucfirst 
	title => [ \%upper_entities,  \%lower_entities, 
		   sub { $_ = ucfirst  }, sub { $_ = lc  } ], 
); 
 
my $default_margin = 72; 
my $default_widow  = 10; 
 
# modified by JS: remove Text:: package 
$Autoformat::widow_slack = 0.1; 
 
 
sub defn($) 
{ 
	return $_[0] if defined $_[0]; 
	return ""; 
} 
 
my $ignore_headers = qr/\A(From\b.*$)?([^:]+:.*$([ \t].*$)*)+\s*\Z/m; 
my $ignore_indent  = qr/^[^\S\n].*(\n[^\S\n].*)*$/; 
 
sub ignore_headers { $_[0]==1 && /$ignore_headers/ } 
 
# BITS OF A TEXT LINE 
 
my $quotechar = qq{[!#%=|:]}; 
my $quotechunk = qq{(?:$quotechar(?![a-z])|[a-z]*>+)}; 
my $quoter = qq{(?:(?i)(?:$quotechunk(?:[ \\t]*$quotechunk)*))}; 
 
my $separator = q/(?:[-_]{2,}|[=#*]{3,}|[+~]{4,})/; 
 
use overload; 
sub autoformat	# ($text, %args) 
{ 
	my ($text,%args,$toSTDOUT); 
 
	foreach ( @_ ) 
	{ 
		if (ref eq 'HASH') 
			{ %args = (%args, %$_) } 
		elsif (!defined($text) && !ref || overload::Method($_,'""')) 
			{ $text = "$_" } 
		else { 
			croak q{Usage: autoformat([text],[{options}])} 
		} 
	} 
 
	unless (defined $text) { 
		$text = join("",<STDIN>); 
		$toSTDOUT = !defined wantarray(); 
	} 
 
	return unless length $text; 
 
	$args{right}   = $default_margin unless exists $args{right}; 
	$args{justify} = "" unless exists $args{justify}; 
	$args{widow}   = 0 if $args{justify}||"" =~ /full/; 
	$args{widow}   = $default_widow unless exists $args{widow}; 
	$args{case}    = '' unless exists $args{case}; 
	$args{squeeze} = 1 unless exists $args{squeeze}; 
	$args{gap}     = 0 unless exists $args{gap}; 
	$args{break}  = break_at('-') unless exists $args{break}; 
	$args{impfill} = ! exists $args{fill}; 
	$args{expfill} = $args{fill}; 
	$args{renumber} = 1 unless exists $args{renumber}; 
	$args{autocentre} = 1 unless exists $args{autocentre}; 
	$args{_centred} = 1 if $args{justify} =~ /cent(er(ed)?|red?)/; 
 
	# SPECIAL IGNORANCE... 
	if ($args{ignore}) { 
		$args{all} = 1; 
		my $ig_type = ref $args{ignore}; 
		if ($ig_type eq 'Regexp') { 
			my $regex = $args{ignore}; 
			$args{ignore} = sub { /$regex/ }; 
		} 
		elsif ($args{ignore} =~ /^indent/i) { 
			$args{ignore} = sub { ignore_headers(@_) || /$ignore_indent/ }; 
		} 
		croak "Expected suboutine reference as value for -ignore option" 
			if ref $args{ignore} ne 'CODE'; 
	} 
	else { 
		$args{ignore} = \&ignore_headers; 
	} 
	 
	# DETABIFY 
	my @rawlines = split /\n/, $text; 
	use Text::Tabs; 
	@rawlines = expand(@rawlines); 
 
	# PARSE EACH LINE 
 
	my $pre = 0; 
	my @lines; 
	foreach (@rawlines) 
	{ 
			push @lines, { raw	   => $_ }; 
			s/\A([ \t]*)($quoter?)([ \t]*)// 
				or die "Internal Error ($@) on '$_'"; 
			$lines[-1]{presig} =  $lines[-1]{prespace}   = defn $1; 
			$lines[-1]{presig} .= $lines[-1]{quoter}     = defn $2; 
			$lines[-1]{presig} .= $lines[-1]{quotespace} = defn $3; 
 
			$lines[-1]{hang}       = Hang->new($_); 
 
			s/([ \t]*)(.*?)(\s*)$// 
				or die "Internal Error ($@) on '$_'"; 
			$lines[-1]{hangspace} = defn $1; 
			$lines[-1]{text} = defn $2; 
			$lines[-1]{empty} = $lines[-1]{hang}->empty() && $2 !~ /\S/; 
			$lines[-1]{separator} = $lines[-1]{text} =~ /^$separator$/; 
	} 
 
	# SUBDIVIDE DOCUMENT INTO COHERENT SUBSECTIONS 
 
	my @chunks; 
	push @chunks, [shift @lines]; 
	foreach my $line (@lines) 
	{ 
		if ($line->{separator} || 
		    $line->{quoter} ne $chunks[-1][-1]->{quoter} || 
		    $line->{empty} || 
		    @chunks && $chunks[-1][-1]->{empty}) 
		{ 
			push @chunks, [$line]; 
		} 
		else 
		{ 
			push @{$chunks[-1]}, $line; 
		} 
	} 
 
 
 
 # DETECT CENTRED PARAS 
 
	CHUNK: foreach my $chunk ( @chunks ) 
	{ 
		next CHUNK if !$args{autocentre} || @$chunk < 2; 
		my @length; 
		my $ave = 0; 
		foreach my $line (@$chunk) 
		{ 
			my $prespace = $line->{quoter}  ? $line->{quotespace} 
							: $line->{prespace}; 
			my $pagewidth =  
				2*length($prespace) + length($line->{text}); 
			push @length, [length $prespace,$pagewidth]; 
			$ave += $pagewidth; 
		} 
		$ave /= @length; 
		my $diffpre = 0; 
		foreach my $l (0..$#length) 
		{ 
			next CHUNK unless abs($length[$l][1]-$ave) <= 2; 
			$diffpre ||= $length[$l-1][0] != $length[$l][0] 
				if $l > 0; 
		} 
		next CHUNK unless $diffpre; 
		foreach my $line (@$chunk) 
		{ 
			$line->{centred} = 1; 
			($line->{quoter} ? $line->{quotespace} 
					 : $line->{prespace}) = ""; 
		} 
	} 
 
	# REDIVIDE INTO PARAGRAPHS 
 
	my @paras; 
	foreach my $chunk ( @chunks ) 
	{ 
		my $first = 1; 
		my $firstfrom; 
		foreach my $line ( @{$chunk} ) 
		{ 
			if ($first || 
			    $line->{quoter} ne $paras[-1]->{quoter} || 
			    $paras[-1]->{separator} || 
			    !$line->{hang}->empty 
			   ) 
			{ 
				push @paras, $line; 
				$first = 0; 
				$firstfrom = length($line->{raw}) - length($line->{text}); 
			} 
			else 
			{ 
    my $extraspace = length($line->{raw}) - length($line->{text}) - $firstfrom; 
				$paras[-1]->{text} .= "\n" . q{ }x$extraspace . $line->{text}; 
				$paras[-1]->{raw} .= "\n" . $line->{raw}; 
			} 
		} 
	} 
 
	# SELECT PARAS TO HANDLE 
 
	my $remainder = ""; 
	if ($args{all}) { # STOP AT MAIL TERMINATOR 
		for my $index (0..$#paras) { 
		    local $_ = $paras[$index]{raw}; 
		    $paras[$index]{ignore} = $args{ignore}($index+1); 
		    next unless /^--$/; 
		    $remainder = join "\n", map { $_->{raw} } splice @paras, $index; 
	            $remainder .= "\n" unless $remainder =~ /\n\z/; 
		    last; 
		} 
	} 
	else { # JUST THE FIRST PARA 
		$remainder = join "\n", map { $_->{raw} } @paras[1..$#paras]; 
	        $remainder .= "\n" unless $remainder =~ /\n\z/; 
		@paras = ( $paras[0] ); 
	} 
 
	# RE-CASE TEXT 
	if ($args{case}) { 
		foreach my $para ( @paras ) { 
			next if $para->{ignore}; 
			if ($args{case} =~ /upper/i) { 
				$para->{text} = recase($para->{text}, 'upper'); 
			} 
			if ($args{case} =~ /lower/i) { 
				$para->{text} = recase($para->{text}, 'lower'); 
			} 
			if ($args{case} =~ /title/i) { 
				entitle($para->{text},0); 
			} 
			if ($args{case} =~ /highlight/i) { 
				entitle($para->{text},1); 
			} 
			if ($args{case} =~ /sentence(\s*)/i) { 
				my $trailer = $1; 
				$args{squeeze}=0 if $trailer && $trailer ne " "; 
				ensentence(); 
				$para->{text} =~ s/(\S+(\s+|$))/ensentence($1, $trailer)/ge; 
			} 
			$para->{text} =~ s/\b([A-Z])[.]/\U$1./gi; # ABBREVS 
		} 
	} 
 
	# ALIGN QUOTERS 
	# DETERMINE HANGING MARKER TYPE (BULLET, ALPHA, ROMAN, ETC.) 
 
	my %sigs; 
	my $lastquoted = 0; 
	my $lastprespace = 0; 
	for my $i ( 0..$#paras ) 
	{ 
		my $para = $paras[$i]; 
		next if $para->{ignore}; 
 
	 if ($para->{quoter}) 
		{ 
			if ($lastquoted) { $para->{prespace} = $lastprespace } 
			else		 { $lastquoted = 1; $lastprespace = $para->{prespace} } 
		} 
		else 
		{ 
			$lastquoted = 0; 
		} 
	} 
 
# RENUMBER PARAGRAPHS 
 
	for my $para ( @paras ) { 
		next if $para->{ignore}; 
		my $sig = $para->{presig} . $para->{hang}->signature(); 
		push @{$sigs{$sig}{hangref}}, $para; 
		$sigs{$sig}{hangfields} = $para->{hang}->fields()-1 
			unless defined $sigs{$sig}{hangfields}; 
	} 
 
	while (my ($sig,$val) = each %sigs) { 
		next unless $sig =~ /rom/; 
		field: for my $field ( 0..$val->{hangfields} ) 
		{ 
			my $romlen = 0; 
			foreach my $para ( @{$val->{hangref}} ) 
			{ 
				my $hang = $para->{hang}; 
				my $fieldtype = $hang->field($field); 
				next field  
					unless $fieldtype && $fieldtype =~ /rom|let/; 
				if ($fieldtype eq 'let') { 
					foreach my $para ( @{$val->{hangref}} ) { 
						$hang->field($field=>'let') 
					} 
				} 
				else { 
					$romlen += length $hang->val($field); 
				} 
			} 
			# NO ROMAN LETTER > 1 CHAR -> ALPHABETICS 
			if ($romlen <= @{$val->{hangref}}) { 
				foreach my $para ( @{$val->{hangref}} ) { 
					$para->{hang}->field($field=>'let') 
				} 
			} 
		} 
	} 
 
	my %prev; 
 
	for my $para ( @paras ) { 
		next if $para->{ignore}; 
		my $sig = $para->{presig} . $para->{hang}->signature(); 
		if ($args{renumber}) { 
			unless ($para->{quoter}) { 
				$para->{hang}->incr($prev{""}, $prev{$sig}); 
				$prev{""} = $prev{$sig} = $para->{hang} 
					unless $para->{hang}->empty; 
			} 
		} 
			 
		# COLLECT MAXIMAL HANG LENGTHS BY SIGNATURE 
 
		my $siglen = $para->{hang}->length(); 
		$sigs{$sig}{hanglen} = $siglen 
			if ! $sigs{$sig}{hanglen} || 
			   $sigs{$sig}{hanglen} < $siglen; 
	} 
 
	# PROPAGATE MAXIMAL HANG LENGTH 
 
	while (my ($sig,$val) = each %sigs) 
	{ 
		foreach (@{$val->{hangref}}) { 
			$_->{hanglen} = $val->{hanglen}; 
		} 
	} 
 
	# BUILD FORMAT FOR EACH PARA THEN FILL IT  
 
	$text = ""; 
	my $gap = $paras[0]->{empty} ? 0 : $args{gap}; 
	for my $para ( @paras ) 
	{ 
	    if ($para->{empty}) { 
		$gap += 1 + ($para->{text} =~ tr/\n/\n/); 
	    } 
	    if ($para->{ignore}) { 
	        $text .= (!$para->{empty} ? "\n"x($args{gap}-$gap) : "") ; 
		$text .= $para->{raw}; 
		$text .= "\n" unless $para->{raw} =~ /\n\z/; 
	    } 
	    else { 
	        my $leftmargin = $args{left} ? " "x($args{left}-1) 
					 : $para->{prespace}; 
	        my $hlen = $para->{hanglen} || $para->{hang}->length; 
	        my $hfield = ($hlen==1 ? '~' : '>'x$hlen); 
	        my @hang; 
	        push @hang, $para->{hang}->stringify if $hlen; 
	        my $format = $leftmargin 
			   . quotemeta($para->{quoter}) 
			   . $para->{quotespace} 
			   . $hfield 
			   . $para->{hangspace}; 
                # modified by JS: remove Text:: package 
	        my $rightslack = int (($args{right}-length $leftmargin)*$Autoformat::widow_slack); 
	        my ($widow_okay, $rightindent, $firsttext, $newtext) = (0,0); 
	        do { 
	            my $tlen = $args{right}-$rightindent-length($leftmargin 
			 			    . $para->{quoter} 
			 			    . $para->{quotespace} 
			 			    . $hfield 
			 			    . $para->{hangspace}); 
	            next if blockquote($text,$para, $format, $tlen, \@hang, \%args); 
	            my $tfield = ( $tlen==1                          ? '~' 
			         : $para->{centred}||$args{_centred} ? '|'x$tlen 
			         : $args{justify} eq 'right'         ? ']'x$tlen 
			         : $args{justify} eq 'full'          ? '['x($tlen-2) . ']]' 
			         : $para->{centred}||$args{_centred} ? '|'x$tlen 
			         :                                     '['x$tlen 
        		         ); 
		    my $tryformat = "$format$tfield"; 
		    $newtext = (!$para->{empty} ? "\n"x($args{gap}-$gap) : "")  
		             . form( { squeeze=>$args{squeeze}, trim=>1, 
				       break=>$args{break}, 
				       fill => !(!($args{expfill} 
					    || $args{impfill} && 
					       !$para->{centred})) 
			           }, 
				    $tryformat, @hang, 
				    $para->{text}); 
		    $firsttext ||= $newtext; 
		    $newtext =~ /\s*([^\n]*)$/; 
		    $widow_okay = $para->{empty} || length($1) >= $args{widow}; 
	        } until $widow_okay || ++$rightindent > $rightslack; 
     
	        $text .= $widow_okay ? $newtext : $firsttext; 
	    } 
	    $gap = 0 unless $para->{empty}; 
	} 
 
 
	# RETURN FORMATTED TEXT 
 
	if ($toSTDOUT) { print STDOUT $text . $remainder; return } 
	return $text . $remainder; 
} 
 
use utf8; 
 
my $alpha = qr/[^\W\d_]/; 
my $notalpha = qr/[\W\d_]/; 
my $word = qr/\pL(?:\pL'?)*/; 
my $upper = qr/[^\Wa-z\d_]/; 
my $lower = qr/[^\WA-Z\d_]/; 
my $mixed = qr/$alpha*?(?:$lower$upper|$upper$lower)$alpha*/; 
 
sub recase { 
	my ($origtext, $case) = @_; 
	my ($entities, $other_entities, $first, $rest) = @{$casing{$case}}; 
 
	my $text = ""; 
	my @pieces = split /(&[a-z]+;)/i, $origtext; 
	use Data::Dumper 'Dumper'; 
	push @pieces, "" if @pieces % 2; 
	return $text unless @pieces; 
	local $_ = shift @pieces; 
	if (length $_) { 
		$entities = $other_entities; 
		&$first; 
		$text .= $_; 
	} 
	return $text unless @pieces; 
	$_ = shift @pieces; 
	$text .= $entities->{$_} || $_; 
	while (@pieces) { 
		$_ = shift @pieces; &$rest; $text .= $_; 
		$_ = shift @pieces; $text .= $other_entities->{$_} || $_; 
	} 
	return $text; 
} 
 
my $alword = qr{(?:\pL|&[a-z]+;)(?:[\pL']|&[a-z]+;)*}i; 
 
sub entitle { 
	my $ignore = pop; 
	local *_ = \shift; 
 
	# put into lowercase if on stop list, else titlecase 
	s{($alword)} 
         # modified by JS: just a formatting change 
	 { $ignore &&  
	       $ignore{lc $1} ? recase($1,'lower') : recase($1,'title') }gex; 
 
	s/^($alword) /recase($1,'title')/ex;  # last word always to cap 
	s/ ($alword)$/recase($1,'title')/ex;  # first word always to cap 
 
	# treat parethesized portion as a complete title 
	s/\( ($alword) /'('.recase($1,'title')/ex; 
	s/($alword) \) /recase($1,'title').')'/ex; 
 
	# capitalize first word following colon or semi-colon 
	s/ ( [:;] \s+ ) ($alword) /$1 . recase($2,'title')/ex; 
} 
 
my $abbrev = join '|', qw{ 
        # modified by JS: add al. and Jr. 
	etc[.]	pp[.]	ph[.]?d[.]	U[.]S[.]  al. Jr. 
}; 
 
my $gen_abbrev = join '|', $abbrev, qw{ 
 	(^[^a-z]*([a-z][.])+) 
}; 
 
my $term = q{(?:[.]|[!?]+)}; 
 
my $eos = 1; 
my $brsent = 0; 
 
sub ensentence { 
	do { $eos = 1; return } unless @_; 
	my ($str, $trailer) = @_; 
	if ($str =~ /^([^a-z]*)I[^a-z]*?($term?)[^a-z]*$/i) { 
		$eos = $2; 
		$brsent = $1 =~ /^[[(]/; 
		return uc $str 
	} 
        # modified by JS: Don't lc LaTeX stuff inside {} 
	unless ($str =~ /[a-z0-9].*[A-Z]|[A-Z].*[a-z0-9]/ or  
		$str =~ /^\(?\{?[A-Z]+\}?\)?/) { 
		$str = lc $str; 
	} 
	if ($eos) { 
		$str =~ s/([a-z])/uc $1/ie; 
		$brsent = $str =~ /^[[(]/; 
	} 
	$eos = $str !~ /($gen_abbrev)[^a-z]*\s/i 
	    && $str =~ /[a-z][^a-z]*$term([^a-z]*)\s/ 
	    && !($1=~/[])]/ && !$brsent); 
	$str =~ s/\s+$/$trailer/ if $eos && $trailer; 
	return $str; 
} 
 
# blockquote($text,$para, $format, $tlen, \@hang, \%args); 
sub blockquote { 
	my ($dummy, $para, $format, $tlen, $hang, $args) = @_; 
=begin other 
	print STDERR "[", join("|", $para->{raw} =~ 
/ \A(\s*)		# $1 - leading whitespace (quotation) 
	   (["']|``)		# $2 - opening quotemark 
	   (.*)			# $3 - quotation 
	   (''|\2)		# $4 closing quotemark 
	   \s*?\n		# trailing whitespace 
	   (\1[ ]+)		# $5 - leading whitespace (attribution) 
	   (--|-)		# $6 - attribution introducer 
	   ([^\n]*?$)		# $7 - attribution line 1 
	   ((\5[^\n]*?$)*)		# $8 - attributions lines 2-N 
	   \s*\Z 
	 /xsm 
), "]\n"; 
=cut 
	$para->{text} =~ 
		/ \A(\s*)		# $1 - leading whitespace (quotation) 
	   (["']|``)		# $2 - opening quotemark 
	   (.*)			# $3 - quotation 
	   (''|\2)		# $4 closing quotemark 
	   \s*?\n		# trailing whitespace 
	   (\1[ ]+)		# $5 - leading whitespace (attribution) 
	   (--|-)		# $6 - attribution introducer 
	   (.*?$)		# $7 - attribution line 1 
	   ((\5.*?$)*)		# $8 - attributions lines 2-N 
	   \s*\Z 
	 /xsm 
	 or return; 
 
	#print "[$1][$2][$3][$4][$5][$6][$7]\n"; 
	my $indent = length $1; 
	my $text = $2.$3.$4; 
	my $qindent = length $2; 
	my $aindent = length $5; 
	my $attribintro = $6; 
	my $attrib = $7.$8; 
	$text =~ s/\n/ /g; 
 
	$_[0] .=  
 
				form {squeeze=>$args->{squeeze}, trim=>1, 
          fill => $args->{expfill} 
			       }, 
	   $format . q{ }x$indent . q{<}x$tlen, 
             @$hang, $text, 
	   $format . q{ }x($qindent) . q{[}x($tlen-$qindent),  
             @$hang, $text, 
	   {squeeze=>0}, 
	   $format . q{ } x $aindent . q{>> } . q{[}x($tlen-$aindent-3), 
             @$hang, $attribintro, $attrib; 
	return 1; 
} 
 
package Hang; 
 
# ROMAN NUMERALS 
 
sub inv($@) { my ($k, %inv)=shift; for(0..$#_) {$inv{$_[$_]}=$_*$k} %inv }  
my @unit= ( "" , qw ( I II III IV V VI VII VIII IX )); 
my @ten = ( "" , qw ( X XX XXX XL L LX LXX LXXX XC )); 
my @hund= ( "" , qw ( C CC CCC CD D DC DCC DCCC CM )); 
my @thou= ( "" , qw ( M MM MMM )); 
my %rval= (inv(1,@unit),inv(10,@ten),inv(100,@hund),inv(1000,@thou)); 
my $rbpat= join ")(",join("|",reverse @thou), join("|",reverse @hund), join("|",reverse @ten), join("|",reverse @unit); 
my $rpat= join ")(?:",join("|",reverse @thou), join("|",reverse @hund), join("|",reverse @ten), join("|",reverse @unit); 
 
sub fromRoman($) 
{ 
    return 0 unless $_[0] =~ /^.*?($rbpat).*$/i; 
    return $rval{uc $1} + $rval{uc $2} + $rval{uc $3} + $rval{uc $4}; 
} 
 
sub toRoman($$) 
{ 
    my ($num,$example) = @_; 
    return '' unless $num =~ /^([0-3]??)(\d??)(\d??)(\d)$/; 
    my $roman = $thou[$1||0] . $hund[$2||0] . $ten[$3||0] . $unit[$4||0]; 
    return $example=~/[A-Z]/ ? uc $roman : lc $roman; 
} 
 
# BITS OF A NUMERIC VALUE 
 
my $num = q/(?:\d{1,3}\b)/; 
my $rom = qq/(?:(?=[MDCLXVI])(?:$rpat))/; 
my $let = q/[A-Za-z]/; 
my $pbr = q/[[(<]/; 
my $sbr = q/])>/; 
my $ows = q/[ \t]*/; 
my %close = ( '[' => ']', '(' => ')', '<' => '>', "" => '' ); 
 
my $hangPS      = qq{(?i:ps:|(?:p\\.?)+s\\b\\.?(?:[ \\t]*:)?)}; 
my $hangNB      = qq{(?i:n\\.?b\\.?(?:[ \\t]*:)?)}; 
my $hangword    = qq{(?:(?:Note)[ \\t]*:)}; 
my $hangbullet  = qq{[*.+-]}; 
my $hang        = qq{(?:(?i)(?:$hangNB|$hangword|$hangbullet)(?=[ \t]))}; 
 
# IMPLEMENTATION 
 
sub new {  
	my ($class, $orig) = @_; 
	my $origlen = length $orig; 
	my @vals; 
	if ($_[1] =~ s#\A($hangPS)##) { 
		@vals = { type => 'ps', val => $1 } 
	} 
	elsif ($_[1] =~ s#\A($hang)##) { 
		@vals = { type => 'bul', val => $1 } 
	} 
	else { 
		local $^W; 
		my $cut; 
		while (length $_[1]) { 
			last if $_[1] =~ m#\A($ows)($abbrev)# 
			     && (length $1 || !@vals);	# ws-separated or first 
 
			$cut = $origlen - length $_[1]; 
			my $pre = $_[1] =~ s#\A($ows$pbr$ows)## ? $1 : ""; 
			my $val =  $_[1] =~ s#\A($num)##  && { type=>'num', val=>$1 } 
			       || $_[1] =~ s#\A($rom)##i && { type=>'rom', val=>$1, nval=>fromRoman($1) } 
			       || $_[1] =~ s#\A($let(?!$let))##i && { type=>'let', val=>$1 } 
			       || { val => "", type => "" }; 
			$_[1] = $pre.$_[1] and last unless $val->{val}; 
			$val->{post} = $pre && $_[1] =~ s#\A($ows()[.:/]?[$close{$pre}][.:/]?)## && $1 
		                     || $_[1] =~ s#\A($ows()[$sbr.:/])## && $1 
		                     || ""; 
			$val->{pre}  = $pre; 
			$val->{cut}  = $cut; 
			push @vals, $val; 
		} 
		while (@vals && !$vals[-1]{post}) { 
			$_[1] = substr($orig,pop(@vals)->{cut}); 
		} 
	} 
	# check for orphaned years... 
	if (@vals==1 && $vals[0]->{type} eq 'num' 
		     && $vals[0]->{val} >= 1000 
		     && $vals[0]->{post} eq '.')  { 
		$_[1] = substr($orig,pop(@vals)->{cut}); 
 
        } 
	return NullHang->new if !@vals; 
	bless \@vals, $class; 
}  
 
sub incr { 
	local $^W; 
	my ($self, $prev, $prevsig) = @_; 
	my $level; 
	# check compatibility 
 
	return unless $prev && !$prev->empty; 
 
	for $level (0..(@$self<@$prev ? $#$self : $#$prev)) { 
		if ($self->[$level]{type} ne $prev->[$level]{type}) { 
			return if @$self<=@$prev;	# no incr if going up 
			$prev = $prevsig; 
			last; 
		} 
	} 
	return unless $prev && !$prev->empty; 
	if ($self->[0]{type} eq 'ps') { 
		my $count = 1 + $prev->[0]{val} =~ s/(p[.]?)/$1/gi; 
		$prev->[0]{val} =~ /^(p[.]?).*(s[.]?[:]?)/; 
		$self->[0]{val} = $1  x $count . $2; 
	} 
	elsif ($self->[0]{type} eq 'bul') { 
		# do nothing 
	} 
	elsif (@$self>@$prev) {	# going down level(s) 
		for $level (0..$#$prev) { 
				@{$self->[$level]}{'val','nval'} = @{$prev->[$level]}{'val','nval'}; 
		} 
		for $level (@$prev..$#$self) { 
				_reset($self->[$level]); 
		} 
	} 
	else	# same level or going up 
	{ 
		for $level (0..$#$self) { 
			@{$self->[$level]}{'val','nval'} = @{$prev->[$level]}{'val','nval'}; 
		} 
		_incr($self->[-1]) 
	} 
} 
 
sub _incr { 
	local $^W; 
	if ($_[0]{type} eq 'rom') { 
		$_[0]{val} = toRoman(++$_[0]{nval},$_[0]{val}); 
	} 
	else { 
		$_[0]{val}++ unless $_[0]{type} eq 'let' && $_[0]{val}=~/Z/i; 
	} 
} 
 
sub _reset { 
	local $^W; 
	if ($_[0]{type} eq 'rom') { 
		$_[0]{val} = toRoman($_[0]{nval}=1,$_[0]{val}); 
	} 
	elsif ($_[0]{type} eq 'let') { 
		$_[0]{val} = $_[0]{val} =~ /[A-Z]/ ? 'A' : 'a'; 
	} 
	else { 
		$_[0]{val} = 1; 
	} 
} 
 
sub stringify { 
	my ($self) = @_; 
	my ($str, $level) = (""); 
	for $level (@$self) { 
		local $^W; 
		$str .= join "", @{$level}{'pre','val','post'}; 
	} 
	return $str; 
}  
 
sub val { 
	my ($self, $i) = @_; 
	return $self->[$i]{val}; 
} 
 
sub fields { return scalar @{$_[0]} } 
 
sub field { 
	my ($self, $i, $newval) = @_; 
	$self->[$i]{type} = $newval if @_>2; 
	return $self->[$i]{type}; 
} 
 
sub signature { 
	local $^W; 
	my ($self) = @_; 
	my ($str, $level) = (""); 
	for $level (@$self) { 
		$level->{type} ||= ""; 
		$str .= join "", $level->{pre}, 
		                 ($level->{type} =~ /rom|let/ ? "romlet" : $level->{type}), 
		                 $level->{post}; 
	} 
	return $str; 
}  
 
sub length { 
	length $_[0]->stringify 
} 
 
sub empty { 0 } 
 
package NullHang; 
 
sub new       { bless {}, $_[0] } 
sub stringify { "" } 
sub length    { 0 } 
sub incr      {} 
sub empty     { 1 } 
sub signature     { "" } 
sub fields { return 0 } 
sub field { return "" } 
sub val { return "" } 
1; 
 
__END__ 
 
=head1 NAME 
 
Text::Autoformat - Automatic text wrapping and reformatting 
 
=head1 VERSION 
 
This document describes version 1.12 of Text::Autoformat, 
released May 27, 2003. 
 
=head1 SYNOPSIS 
 
 # Minimal use: read from STDIN, format to STDOUT... 
 
	use Text::Autoformat; 
	autoformat; 
 
 # In-memory formatting... 
 
	$formatted = autoformat $rawtext; 
 
 # Configuration... 
 
	$formatted = autoformat $rawtext, { %options }; 
 
 # Margins (1..72 by default)... 
 
	$formatted = autoformat $rawtext, { left=>8, right=>70 }; 
 
 # Justification (left by default)... 
 
	$formatted = autoformat $rawtext, { justify => 'left' }; 
	$formatted = autoformat $rawtext, { justify => 'right' }; 
	$formatted = autoformat $rawtext, { justify => 'full' }; 
	$formatted = autoformat $rawtext, { justify => 'centre' }; 
 
 # Filling (does so by default)... 
 
	$formatted = autoformat $rawtext, { fill=>0 }; 
 
 # Squeezing whitespace (does so by default)... 
 
	$formatted = autoformat $rawtext, { squeeze=>0 }; 
 
 # Case conversions... 
 
	$formatted = autoformat $rawtext, { case => 'lower' }; 
	$formatted = autoformat $rawtext, { case => 'upper' }; 
	$formatted = autoformat $rawtext, { case => 'sentence' }; 
	$formatted = autoformat $rawtext, { case => 'title' }; 
	$formatted = autoformat $rawtext, { case => 'highlight' }; 
 
 # Selective reformatting 
 
	$formatted = autoformat $rawtext, { ignore=>qr/^\t/ }; 
 
 
=head1 BACKGROUND 
 
=head2 The problem 
 
Perl plaintext formatters just aren't smart enough. Given a typical 
piece of plaintext in need of formatting: 
 
        In comp.lang.perl.misc you wrote: 
        : > <CN = Clooless Noobie> writes: 
        : > CN> PERL sux because: 
        : > CN>    * It doesn't have a switch statement and you have to put $ 
        : > CN>signs in front of everything 
        : > CN>    * There are too many OR operators: having |, || and 'or' 
        : > CN>operators is confusing 
        : > CN>    * VB rools, yeah!!!!!!!!! 
        : > CN> So anyway, how can I stop reloads on a web page? 
        : > CN> Email replies only, thanks - I don't read this newsgroup. 
        : > 
        : > Begone, sirrah! You are a pathetic, Bill-loving, microcephalic 
        : > script-infant. 
        : Sheesh, what's with this group - ask a question, get toasted! And how 
        : *dare* you accuse me of Ianuphilia! 
 
both the venerable Unix L<fmt> tool and Perl's standard Text::Wrap module 
produce: 
 
        In comp.lang.perl.misc you wrote:  : > <CN = Clooless Noobie> 
        writes:  : > CN> PERL sux because:  : > CN>    * It doesn't 
        have a switch statement and you have to put $ : > CN>signs in 
        front of everything : > CN>    * There are too many OR 
        operators: having |, || and 'or' : > CN>operators is confusing 
        : > CN>    * VB rools, yeah!!!!!!!!!  : > CN> So anyway, how 
        can I stop reloads on a web page?  : > CN> Email replies only, 
        thanks - I don't read this newsgroup.  : > : > Begone, sirrah! 
        You are a pathetic, Bill-loving, microcephalic : > 
        script-infant.  : Sheesh, what's with this group - ask a 
        question, get toasted! And how : *dare* you accuse me of 
        Ianuphilia! 
 
Other formatting modules -- such as Text::Correct and Text::Format -- 
provide more control over their output, but produce equally poor results 
when applied to arbitrary input. They simply don't understand the 
structural conventions of the text they're reformatting. 
 
=head2 The solution 
 
The Text::Autoformat module provides a subroutine named C<autoformat> that 
wraps text to specified margins. However, C<autoformat> reformats its 
input by analysing the text's structure, so it wraps the above example 
like so: 
 
        In comp.lang.perl.misc you wrote: 
        : > <CN = Clooless Noobie> writes: 
        : > CN> PERL sux because: 
        : > CN>    * It doesn't have a switch statement and you 
        : > CN>      have to put $ signs in front of everything 
        : > CN>    * There are too many OR operators: having |, || 
        : > CN>      and 'or' operators is confusing 
        : > CN>    * VB rools, yeah!!!!!!!!! So anyway, how can I 
        : > CN>      stop reloads on a web page? Email replies 
        : > CN>      only, thanks - I don't read this newsgroup. 
        : > 
        : > Begone, sirrah! You are a pathetic, Bill-loving, 
        : > microcephalic script-infant. 
        : Sheesh, what's with this group - ask a question, get toasted! 
        : And how *dare* you accuse me of Ianuphilia! 
 
Note that the various quoting conventions have been observed. In fact, 
their structure has been used to determine where some paragraphs begin. 
Furthermore C<autoformat> correctly distinguished between the leading 
'*' bullets of the nested list (which were outdented) and the leading 
emphatic '*' of "*dare*" (which was inlined). 
 
=head1 DESCRIPTION 
 
=head2 Paragraphs 
 
The fundamental task of the C<autoformat> subroutine is to identify and 
rearrange independent paragraphs in a text. Paragraphs typically consist 
of a series of lines containing at least one non-whitespace character, 
followed by one or more lines containing only optional whitespace. 
This is a more liberal definition than many other formatters 
use: most require an empty line to terminate a paragraph. Paragraphs may 
also be denoted by bulleting, numbering, or quoting (see the following 
sections). 
 
Once a paragraph has been isolated, C<autoformat> fills and re-wraps its 
lines according to the margins that are specified in its argument list. 
These are placed after the text to be formatted, in a hash reference: 
 
        $tidied = autoformat($messy, {left=>20, right=>60}); 
 
By default, C<autoformat> uses a left margin of 1 (first column) and a 
right margin of 72. 
 
You can also control whether (and how) C<autoformat> breaks words at the 
end of a line, using the C<'break'> option: 
 
	# Turn off all hyphenation 
	use Text::Autoformat qw(autoformat break_wrap); 
        $tidied = autoformat($messy, {break=>break_wrap}); 
 
	# Default hyphenation 
	use Text::Autoformat qw(autoformat break_at); 
        $tidied = autoformat($messy, {break=>break_at('-')}); 
 
	# Use TeX::Hyphen module's hyphenation (module must be installed) 
	use Text::Autoformat qw(autoformat break_TeX); 
        $tidied = autoformat($messy, {break=>break_TeX}); 
 
 
Normally, C<autoformat> only reformats the first paragraph it encounters, 
and leaves the remainder of the text unaltered. This behaviour is useful 
because it allows a one-liner invoking the subroutine to be mapped 
onto a convenient keystroke in a text editor, to provide  
one-paragraph-at-a-time reformatting: 
 
        % cat .exrc 
 
        map f !Gperl -MText::Autoformat -e'autoformat' 
 
(Note that to facilitate such one-liners, if C<autoformat> is called 
in a void context without any text data, it takes its text from 
C<STDIN> and writes its result to C<STDOUT>). 
 
To enable C<autoformat> to rearrange the entire input text at once, the 
C<all> argument is used: 
 
        $tidied_all = autoformat($messy, {left=>20, right=>60, all=>1}); 
 
C<autoformat> can also be directed to selectively reformat paragraphs, 
using the C<ignore> argument: 
 
        $tidied_some = autoformat($messy, {ignore=>qr/^[ \t]/}); 
 
The value for C<ignore> may be a C<qr>'d regex, a subroutine reference, 
or the special string C<'indented'>. 
 
If a regex is specified, any paragraph whose original text matches that 
regex will not be reformatted (i.e. it will be printed verbatim). 
 
If a subroutine is specified, that subroutine will be called once for 
each paragraph (with C<$_> set to the paragraph's text). The subroutine is 
expected to return a true or false value. If it returns true, the 
paragraph will not be reformatted. 
 
If the value of the C<ignore> option is the string C<'indented'>, 
C<autoformat> will ignore any paragraph in which I<every> line begins with a 
whitespace. 
 
=head2 Bulleting and (re-)numbering 
 
Often plaintext will include lists that are either: 
 
        * bulleted, 
        * simply numbered (i.e. 1., 2., 3., etc.), or 
        * hierarchically numbered (1, 1.1, 1.2, 1.3, 2, 2.1. and so forth). 
 
In such lists, each bulleted item is implicitly a separate paragraph, 
and is formatted individually, with the appropriate indentation: 
 
        * bulleted, 
        * simply numbered (i.e. 1., 2., 3., 
          etc.), or 
        * hierarchically numbered (1, 1.1, 
          1.2, 1.3, 2, 2.1. and so forth). 
 
More importantly, if the points are numbered, the numbering is 
checked and reordered. For example, a list whose points have been 
rearranged: 
 
        2. Analyze problem 
        3. Design algorithm 
        1. Code solution 
        5. Test 
        4. Ship 
 
would be renumbered automatically by C<autoformat>: 
 
        1. Analyze problem 
        2. Design algorithm 
        3. Code solution 
        4. Ship 
        5. Test 
 
The same reordering would be performed if the "numbering" was by letters 
(C<a.> C<b.> C<c.> etc.) or Roman numerals (C<i.> C<ii.> C<iii.)> or by 
some combination of these (C<1a.> C<1b.> C<2a.> C<2b.> etc.) Handling 
disordered lists of letters and Roman numerals presents an interesting 
challenge. A list such as: 
 
        C. Put cat in box. 
        D. Close lid. 
        E. Activate Geiger counter. 
 
should be reordered as C<A.> C<B.> C<C.,> whereas: 
 
        C. Put cat in box. 
        D. Close lid. 
        XLI. Activate Geiger counter. 
 
should be reordered C<I.> C<II.> C<III.>  
 
The C<autoformat> subroutine solves this problem by always interpreting  
alphabetic bullets as being letters, unless the full list consists 
only of valid Roman numerals, at least one of which is two or 
more characters long. 
 
If automatic renumbering isn't wanted, just specify the C<'renumber'> 
option with a false value. 
 
Note that numbers above 1000 at the start of a line are no longer 
considered to be paragraph numbering. Numbered paragraphs running that 
high are exceptionally rare, and much rarer than paragraphs that look 
like this: 
 
        Although it has long been popular (especially in the year 
        2001) to point out that we now live in the Future, many 
        of the promised miracles of Future Life have failed to 
        eventuate. This is a new phenomenon (it didn't happen in 
        1001) because the idea that the future might be different 
        is a new phenomenon. 
 
which the former numbering rules caused to be formatted like this: 
 
        Although it has long been popular (especially in the year 
 
        2001) to point out that we now live in the Future, many of the 
              promised miracles of Future Life have failed to eventuate. 
              This is a new phenomenon (it didn't happen in 
 
        2002) because the idea that the future might be different is a 
              new phenomenon. 
 
but which are now formatted: 
 
        Although it has long been popular (especially in the year 2001) 
        to point out that we now live in the Future, many of the 
        promised miracles of Future Life have failed to eventuate. This 
        is a new phenomenon (it didn't happen in 1001) because the idea 
        that the future might be different is a new phenomenon. 
 
=head2 Quoting 
 
Another case in which contiguous lines may be interpreted as belonging 
to different paragraphs, is where they are quoted with distinct quoters. 
For example: 
 
        : > CN> So anyway, how can I stop reloads on a web page? Email 
        : > CN> replies only, thanks - I don't read this newsgroup. 
        : > Begone, sirrah! You are a pathetic, Bill-loving, 
        : > microcephalic script-infant. 
        : Sheesh, what's with this group - ask a question, get toasted! 
        : And how *dare* you accuse me of Ianuphilia! 
 
C<autoformat> recognizes the various quoting conventions used in this 
example and treats it as three paragraphs to be independently 
reformatted. 
 
Block quotations present a different challenge. A typical formatter 
would render the following quotation: 
 
        "We are all of us in the gutter, but some of us are looking at 
         the stars" 
                                -- Oscar Wilde 
 
like so: 
 
        "We are all of us in the gutter, but some of us are looking at 
        the stars" -- Oscar Wilde 
 
C<autoformat> recognizes the quotation structure by matching the 
following regular expression against the text component of each 
paragraph: 
 
        / \A(\s*) # leading whitespace for quotation (["']|``) # opening 
        quotemark (.*) # quotation (''|\2) # closing quotemark \s*?\n # 
        trailing whitespace after quotation (\1[ ]+) # leading 
        whitespace for attribution 
                                #   (must be indented more than 
                                #   quotation) 
          (--|-) # attribution introducer ([^\n]*?\n) # first 
          attribution line ((\5[^\n]*?$)*) # other attribution lines 
                                #   (indented no less than first line) 
          \s*\Z # optional whitespace to end of paragraph /xsm 
 
When reformatted (see below), the indentation and the attribution 
structure will be preserved: 
 
        "We are all of us in the gutter, but some of us are looking at 
         the stars" 
                                -- Oscar Wilde 
 
=head2 Widow control 
 
Note that in the last example, C<autoformat> broke the line at column 
68, four characters earlier than it should have. It did so because, if 
the full margin width had been used, the formatting would have left the 
last two words by themselves on an oddly short last line: 
 
        "We are all of us in the gutter, but some of us are looking at 
        the stars" 
 
This phenomenon is known as "widowing" and is heavily frowned upon in 
typesetting circles. It looks ugly in plaintext too, so C<autoformat> 
avoids it by stealing extra words from earlier lines in a paragraph, so 
as to leave enough for a reasonable last line. The heuristic used is 
that final lines must be at least 10 characters long (though this number 
may be adjusted by passing a C<widow =E<gt> I<minlength>> argument to 
C<autoformat>). 
 
If the last line is too short, the paragraph's right margin is reduced 
by one column, and the paragraph is reformatted. This process iterates 
until either the last line exceeds nine characters or the margins have 
been narrowed by 10% of their original separation. In the latter case, 
the reformatter gives up and uses its original formatting. 
 
 
=head2 Justification 
 
The C<autoformat> subroutine also takes a named argument: C<{justify 
=E<gt> I<type>}>, which specifies how each paragraph is to be justified. 
The options are: C<'left'> (the default), C<'right',> C<'centre'> (or 
C<'center'>), and C<'full'>. These act on the complete paragraph text 
(but I<not> on any quoters before that text). For example, with 
C<'right'> justification: 
 
         R3>     Now is the Winter of our discontent made 
         R4> glorious Summer by this son of York. And all 
         R5> the clouds that lour'd upon our house In the 
         R6>              deep bosom of the ocean buried. 
 
Full justification is interesting in a fixed-width medium like plaintext 
because it usually results in uneven spacing between words. Typically, 
formatters provide this by distributing the extra spaces into the first 
available gaps of each line: 
 
         R7> Now is the Winter of our discontent made 
         R8> glorious Summer by this son of York. And all 
         R9> the clouds that lour'd upon our house In 
        R10> the deep bosom of the ocean buried. 
 
This produces a rather jarring visual effect, so C<autoformat> reverses 
the strategy and inserts extra spaces at the end of lines: 
 
        R11> Now is the Winter of our discontent made 
        R12> glorious Summer by this son of York. And all 
        R13> the clouds that lour'd upon our house In 
        R14> the deep bosom of the ocean buried. 
 
Most readers find this less disconcerting. 
 
=head2 Implicit centring 
 
Even if explicit centring is not specified, C<autoformat> will attempt 
to automatically detect centred paragraphs and preserve their 
justification. It does this by examining each line of the paragraph and 
asking: "if this line were part of a centred paragraph, where would the 
centre line have been?" 
 
The answer can be determined by adding the length of leading whitespace 
before the first word, plus half the length of the full set of words on 
the line. That is, for a single line: 
 
        $line =~ /^(\s*)(.*?)(\s*)$/ $centre = 
        length($1)+0.5*length($2); 
 
By making the same estimate for every line, and then comparing the 
estimates, it is possible to deduce whether all the lines are centred 
with respect to the same axis of symmetry (with an allowance of 
E<plusmn>1 to cater for the inevitable rounding when the centre 
positions of even-length rows were originally computed). If a common 
axis of symmetry is detected, C<autoformat> assumes that the lines are 
supposed to be centred, and switches to centre-justification mode for 
that paragraph. 
 
Note that this behaviour can to switched off entirely by setting the 
C<"autocentre"> argument false. 
 
=head2 Case transformations 
 
The C<autoformat> subroutine can also optionally perform case 
conversions on the text it processes. The C<{case =E<gt> I<type>}> 
argument allows the user to specify five different conversions: 
 
=over 4 
 
=item C<'upper'> 
 
This mode unconditionally converts every letter in the reformatted text 
to upper-case; 
 
=item C<'lower'> 
 
This mode unconditionally converts every letter in the reformatted text 
to lower-case; 
 
=item C<'sentence'> 
 
This mode attempts to generate correctly-cased sentences from the input 
text. That is, the first letter after a sentence-terminating punctuator 
is converted to upper-case. Then, each subsequent word in the sentence 
is converted to lower-case, unless that word is originally mixed-case or 
contains punctuation. For example, under C<{case =E<gt> 'sentence'}>: 
 
        'POVERTY, MISERY, ETC. are the lot of the PhD candidate. alas!' 
 
becomes: 
 
        'Poverty, misery, etc. are the lot of the PhD candidate. Alas!' 
 
Note that C<autoformat> is clever enough to recognize that the period 
after abbreviations such as C<etc.> is not a sentence terminator. 
 
If the argument is specified as C<'sentence '> (with one or more 
trailing whitespace characters) those characters are used to replace the 
single space that appears at the end of the sentence. For example, 
C<autoformat($text, {case=E<gt>'sentence '}>) would produce: 
 
        'Poverty, misery, etc. are the lot of the PhD candidate. Alas!' 
 
=item C<'title'> 
 
This mode behaves like C<'sentence'> except that the first letter of 
I<every> word is capitalized: 
 
        'What I Did On My Summer Vacation In Monterey' 
 
=item C<'highlight'> 
 
This mode behaves like C<'title'> except that trivial words are not 
capitalized: 
 
        'What I Did on my Summer Vacation in Monterey' 
 
=back 
 
=head2 Selective reformatting 
 
You can select which paragraphs C<autoformat> actually reformats (or, 
rather, those it I<doesn't> reformat) using the C<"ignore"> flag. 
 
For example: 
 
        # Reformat all paras except those containing "verbatim"... 
        print autoformat { all => 1, ignore => qr/verbatim/i }, $text; 
 
        # Reformat all paras except those less that 3 lines long... 
        print autoformat { all => 1, ignore => sub { tr/\n/\n/ < 3 
        } }, $text; 
 
        # Reformat all paras except those that are indented... 
        print autoformat { all => 1, ignore => qr/^\s/m }, $text; 
 
        # Reformat all paras except those that are indented (easier)... 
        print autoformat { all => 1, ignore => 'indented' }, $text; 
 
 
=head1 SEE ALSO 
 
The Text::Reform module 
 
=head1 AUTHOR 
 
Damian Conway (damian@conway.org) 
 
=head1 BUGS 
 
There are undoubtedly serious bugs lurking somewhere in code this funky 
:-) Bug reports and other feedback are most welcome. 
 
=head1 COPYRIGHT 
 
Copyright (c) 1997-2000, Damian Conway. All Rights Reserved. This module 
is free software. It may be used, redistributed and/or modified under 
the terms of the Perl Artistic License (see 
http://www.perl.com/perl/misc/Artistic.html)