package XML::Writer::Simple;
use warnings;
use strict;
use Exporter ();
use vars qw/@ISA @EXPORT/;
use XML::DT;
use XML::DTDParser qw/ParseDTDFile/;
=encoding utf-8
=head1 NAME
XML::Writer::Simple - Create XML files easily!
=cut
our $VERSION = '0.08';
@ISA = qw/Exporter/;
@EXPORT = (qw/powertag xml_header/);
our %PTAGS = ();
our $MODULENAME = "XML::Writer::Simple";
our $IS_HTML = 0;
our %TAG_SET = (
html => {
tags => [qw.a abbr acronym address area
b base bdo big blockquote body br button
caption cite code col colgroup
dd del dfn div dl dt
em
fieldset form frame frameset
h1 h2 h3 h4 h5 h6 head hr html
i iframe img input ins
kbd
label legend li link
map meta
noframes noscript
object ol optgroup option
p param pre
q
samp script select small span strong style sub sup
table tbody td textarea tfoot th thead title Tr tt
u ul var.]
},
);
=head1 SYNOPSIS
use XML::Writer::Simple dtd => "file.dtd";
print xml_header(encoding => 'iso-8859-1');
print para("foo",b("bar"),"zbr");
# if you want CGI but you do not want CGI :)
use XML::Writer::Simple ':html';
=head1 USAGE
This module takes some ideas from CGI to make easier the life for
those who need to generated XML code. You can use the module in three
flavours (or combine them):
=over 4
=item tags
When importing the module you can specify the tags you will be using:
use XML::Writer::Simple tags => [qw/p b i tt/];
print p("Hey, ",b("you"),"! ", i("Yes ", b("you")));
that will generate
<p>Hey <b>you</b>! <i>Yes <b>you</b></i></p>
=item dtd
You can supply a DTD, that will be analyzed, and the tags used:
use XML::Writer::Simple dtd => "tmx.dtd";
print tu(seg("foo"),seg("bar"));
=item xml
You can supply an XML (or a reference to a list of XML files). They
will be parsed, and the tags used:
use XML::Writer::Simple xml => "foo.xml";
print foo("bar");
=item partial
You can supply an 'partial' key, to generate prototypes for partial tags
construction. For instance:
use XML::Writer::Simple tags => qw/foo bar/, partial => 1;
print start_foo;
print ...
print end_foo;
=back
You can also use tagsets, where sets of tags from a well known format
are imported. For example, to use HTML:
use XML::Writer::Simple ':html';
=head1 EXPORT
This module export one function for each element at the dtd or xml
file you are using. See below for details.
=head1 FUNCTIONS
=head2 import
Used when you 'use' the module, should not be used directly.
=head2 xml_header
This function returns the xml header string, without encoding
definition, with a trailing new line. Default XML encoding should
be UTF-8, by the way.
You can force an encoding passing it as argument:
print xml_header(encoding=>'iso-8859-1');
=head2 powertag
Used to specify a powertag. For instance:
powertag("ul","li");
ul_li([qw/foo bar zbr ugh/]);
will generate
<ul>
<li>foo</li>
<li>bar</li>
<li>zbr</li>
<li>ugh</li>
</ul>
You can also supply this information when loading the module, with
use XML::Writer::Simple powertags=>["ul_li","ol_li"];
Powertags support three level tags as well:
use XML::Writer::Simple powertags=>["table_tr_td"];
print table_tr_td(['a','b','c'],['d','e','f']);
=cut
sub xml_header {
my %ops = @_;
my $encoding = "";
$encoding =" encoding=\"$ops{encoding}\"" if exists $ops{encoding};
return "<?xml version=\"1.0\"$encoding?>\n";
}
sub powertag {
my $nfunc = join("_", @_);
$PTAGS{$nfunc}=[@_];
push @EXPORT, $nfunc;
XML::Writer::Simple->export_to_level(1, $MODULENAME, $nfunc);
}
sub _xml_from {
my ($tag, $attrs, @body) = @_;
return (ref($body[0]) eq "ARRAY")?
join("", map{ _toxml($tag, $attrs, $_) } @{$body[0]})
:_toxml($tag, $attrs, join("", @body));
}
sub _clean_attrs {
my $attrs = shift;
for (keys %$attrs) {
if (m!^-!) {
$attrs->{$'}=$attrs->{$_};
delete($attrs->{$_});
}
}
return $attrs;
}
sub _toxml {
my ($tag,$attr,$contents) = @_;
if (defined($contents) && $contents ne "") {
return _start_tag($tag,$attr) . $contents . _close_tag($tag);
}
else {
return _empty_tag($tag,$attr);
}
}
sub _go_down {
my ($tags, @values) = @_;
my $tag = shift @$tags;
if (@$tags) {
join("",
map {
my $attrs = {};
if (ref($_->[0]) eq 'HASH') {
$attrs = _clean_attrs(shift @$_);
}
_xml_from($tag,$attrs,_go_down([@$tags],@$_)) } ### REALLY NEED TO COPY
@values)
} else {
join("",
map { _xml_from($tag,{},$_) } @values)
}
}
sub AUTOLOAD {
my $attrs = {};
my $tag = our $AUTOLOAD;
$tag =~ s!${MODULENAME}::!!;
$attrs = shift if ref($_[0]) eq "HASH";
$attrs = _clean_attrs($attrs);
if (exists($PTAGS{$tag})) {
my @tags = @{$PTAGS{$tag}};
my $toptag = shift @tags;
return _xml_from($toptag, $attrs,
_go_down(\@tags, @_));
}
else {
if ($tag =~ m/^end_(.*)$/) {
return _close_tag($1)."\n";
}
elsif ($tag =~ m/^start_(.*)$/) {
return _start_tag($1, $attrs)."\n";
}
else {
return _xml_from($tag,$attrs,@_);
}
}
}
sub _start_tag {
my ($tag,$attr) = @_;
$tag = "tr" if $tag eq "Tr" && $IS_HTML;
$attr = join(" ",map { "$_=\"$attr->{$_}\""} keys %$attr);
if ($attr) {
return "<$tag $attr>"
} else {
return "<$tag>"
}
}
sub _empty_tag {
my ($tag,$attr) = @_;
$tag = "tr" if $tag eq "Tr" && $IS_HTML;
$attr = join(" ",map { "$_=\"$attr->{$_}\""} keys %$attr);
if ($attr) {
return "<$tag $attr/>"
} else {
return "<$tag/>"
}
}
sub _close_tag {
my $tag = shift;
$tag = "tr" if $tag eq "Tr" && $IS_HTML;
return "</$tag>";
}
sub import {
my $class = shift;
my @tags;
my @ptags;
while ($_[0] && $_[0] =~ m!^:(.*)$!) {
shift;
my $pack = $1;
$IS_HTML = 1 if $pack eq "html";
if (exists($TAG_SET{$pack})) {
push @tags => exists $TAG_SET{$pack}{tags} ? @{$TAG_SET{$pack}{tags}} : ();
push @ptags => exists $TAG_SET{$pack}{ptags} ? @{$TAG_SET{$pack}{ptags}} : ();
} else {
die "XML::Writer::Simple - Unknown tagset :$pack\n";
}
}
my %opts = @_;
if (exists($opts{tags})) {
if (ref($opts{tags}) eq "ARRAY") {
push @tags => @{$opts{tags}};
}
}
if (exists($opts{xml})) {
my @xmls = (ref($opts{xml}) eq "ARRAY")?@{$opts{xml}}:($opts{xml});
my $tags;
for my $xml (@xmls) {
dt($xml, -default => sub { $tags->{$q}++ });
}
push @tags => keys %$tags;
}
if (exists($opts{dtd})) {
my $DTD = ParseDTDFile($opts{dtd});
push @tags => keys %$DTD;
}
push @EXPORT => @tags;
if (exists($opts{partial})) {
push @EXPORT => map { "start_$_" } @tags;
push @EXPORT => map { "end_$_" } @tags;
}
if (@ptags || exists($opts{powertags})) {
push @ptags => @{$opts{powertags}} if exists $opts{powertags};
@PTAGS{@ptags} = map { [split/_/] } @ptags;
push @EXPORT => @ptags;
}
XML::Writer::Simple->export_to_level(1, $class, @EXPORT);
}
=head1 AUTHOR
Alberto Simões, C<< <ambs@cpan.org> >>
=head1 BUGS
Please report any bugs or feature requests to
C<bug-xml-writer-simple@rt.cpan.org>, or through the web interface at
L<http://rt.cpan.org/NoAuth/ReportBug.html?Queue=XML-Writer-Simple>.
I will be notified, and then you'll automatically be notified of progress on
your bug as I make changes.
=head1 COPYRIGHT AND LICENSE
Copyright 1999-2012 Project Natura.
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
=cut
1; # End of XML::Writer::Simple