#!/usr/bin/perl -I.

use Pod::Simplify;

$x = new Pod::Simplify;

$col=0;
$lmargin=0;
$width = 75;

$canwrap = 0;
sub output_flow {
	my(@out) = @_;
	if($col<$lmargin) {
		print " " x ($lmargin-$col);
		$col=$lmargin;
	}
	foreach(@out) {
		next if !length;
		if($canwrap and (length($_) + $col) > $width) {
			print "\n";
			print " " x $lmargin;
			$col = $lmargin;
		}
		$canwrap = (substr($_,-1,1) eq " ");
		$col += length($_);
		print $_;
	}
}

sub output_verb {
	my($text,$indent) = @_;
	if( $col < $indent ) {
		print " " x ($indent-$col);
		$col=$indent;
	}
	$text =~ s/\n/ "\n" .(" " x $indent)/ges;
	$text =~ s/ +$//;
	print $text;
	$col = length($text)-rindex($text,"\n")-1;
}

sub flowed {
	my($out);
	foreach $i (@_) {
		if(ref $i eq "ARRAY") {
			my(@i) = (@$i);
			my($c) = shift @i;
			
			if($c eq "X" or $c eq "R") {
				output_flow("$c<");
				flowed(@{$i[0]});
				unless( @i == 2 and @{$i[1]} == 1 and $i[1]->[0] eq $i[0]->[0]) {
					foreach (@i[1..$#i]) {
						output_flow(";".join("/",grep((s/([;\/\\])/\\$1/g,1),@$_)));
					}
				}
				output_flow(">");
			} else {
				output_flow("$c<");
				flowed(@i);
				output_flow(">");
			}			
		} else {
			$i =~ s/([<>])/'E<' . $Pod::Simplify::ASCII2Escape{$1} . '>'/ge;
			output_flow(split(/(\S+\s*)/,$i));
		}
	}
}

@listtype=();

$idx=0;

sub doindex {
	foreach (@_) {
		if(ref $_ eq "ARRAY") {
			my(@i) = @$_;
			my($i) = shift @i;
			if( $i eq "X") {
				shift @i; # discard printable block
				$idx++;
				$name = join("/",@{$i[0]});
				$name =~ s/([^A-Za-z0-9_])/ "%".sprintf("%.2X",ord($1)) /ge;
				foreach (@i) {
					$idx{join("/",@$_)} = [$name,$idx,"perlvar.pod"];
				}
				#print "Index: ",Pod::Simplify::dumpout([@i]),"\n";
			} else {
				doindex(@i);
			}
		}
	}
}

sub end_paragraph {
	print "\n\n";
	$col=0;
}

sub dump2 {
	my($par,$line,$pos,$cmd,$var1,$var2) = @_;
	
	if( $cmd eq "begin" ) {
		if($var1 eq "list") {
			output_flow("=begin list ".$var1->[0]);
		}
		elsif($var1 eq "pod") {
			$file = $var2->[1];
			output_flow("=begin pod");
		}
		elsif($var1 eq "file") {
			# Don't output actual file block
			output_flow("=comment Beginning of file $var2");
		}
		else {
			output_flow("=begin $var1 $var2");
		}
		end_paragraph;
	}
	elsif( $cmd eq "end" ) {
		if($var1 eq "list") {
			output_flow("=end list");
			end_paragraph;
		}
		elsif($var1 eq "pod") {
			output_flow("=end pod");
			end_paragraph;
		}
		elsif($var1 eq "file") {
			# Don't output actual file block
			output_flow("=comment End of file $var2");
			end_paragraph;
		}
		else {
			output_flow("=end $var1 $var2");
			end_paragraph;
		}
	}
	elsif( $cmd eq "item") {
		output_flow("=item ");
		if($var1->[0] eq "bullet") {
			output_flow( "* " );
		} elsif($var1->[0] eq "number") {
			output_flow( $var1->[1] . ". ");
		}
		flowed( @$var2 );
		end_paragraph;
	}
	elsif( $cmd eq "head") {
		output_flow("=head$var1 ");
		flowed(@$var2);
		end_paragraph;
	}
	elsif( $cmd eq "verb") {
		$var1 =~ s/^/\t/mg;
		#output_verb($var1."\n\n",$lmargin+8);
		print $var1;
		end_paragraph;
	}
	elsif( $cmd eq "flow") {
		flowed(@$var2);
		end_paragraph;
	}
	elsif( $cmd eq "index") {
		output_flow("=index ");
		end_paragraph;
	}
	elsif( $cmd eq "comment") {
		output_flow("=comment ");
		print $var1;
		end_paragraph;
	}
	elsif( $cmd eq "warn" ) {
		output_flow("=comment Warning near line $line of $file: $var1");
		end_paragraph;
	} else {
		output_flow("=comment pod2text error near line $line of $file:\n\tUnknown parsed command `$cmd'");
		end_paragraph;
	}
}

$x->parse_from_file_by_name($ARGV[0] || "pod/perlvar.pod",\&dump2);