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=head1 NAME |
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XML::XMLWriter - Module for creating a XML document object oriented |
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with on the fly validating towards the given DTD. |
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=cut |
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###################################################################### |
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package XML::XMLWriter; |
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require 5.8.0; |
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# Copyright (c) 2003, Moritz Sinn. This module is free software; |
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# you can redistribute it and/or modify it under the terms of the |
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# GNU GENERAL PUBLIC LICENSE, see COPYING for more information. |
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use strict; |
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use vars qw($VERSION); |
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$VERSION = '0.1'; |
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###################################################################### |
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=head1 DEPENDENCIES |
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=head2 Perl Version |
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5.004 |
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=head2 Standard Modules |
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Carp 1.01 |
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Encode 1.98 |
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=head2 Nonstandard Modules |
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XML::ParseDTD 0.1.3 |
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=cut |
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###################################################################### |
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use Carp; |
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use Encode; |
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use XML::ParseDTD; |
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use XML::XMLWriter::Element; |
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###################################################################### |
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=head1 SYNOPSIS |
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=head2 Example Code |
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#!/usr/bin/perl |
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use XML::XMLWriter; |
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my @data=(['Name', 'Adress', 'Email', 'Sex'], |
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['Herbert', 'BeerAvenue 45', 'herbert@names.org', 'Male'], |
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['Anelise', 'SchmidtStreet 21', 'foo@bar.com', 'Female'], |
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['XYZ', 'ZYX', 'ZY', 'XZ'], |
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['etc...']); |
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my $doc = new XML::XMLWriter(system => 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd', |
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public => '-//W3C//DTD XHTML 1.0 Transitional//EN'); |
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my $html = $doc->createRoot; |
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$html->head->title->_pcdata('A Table'); |
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my $body = $html->body; |
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$body->h1->_pcdata('Here is a table!'); |
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my $table = $body->table({align => 'center', cellspacing => 1, cellpadding => 2, border => 1}); |
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for(my $i=0; $i<@data; $i++) { |
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my $tr = $table->tr; |
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foreach $_ (@{$data[$i]}) { |
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$i==0 ? $tr->th->_pcdata($_) : $tr->td->_pcdata($_); |
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} |
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} |
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$body->b->_pcdata("that's it!"); |
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$doc->print(); |
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=head2 Example Output |
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A TableHere is a table!Name | Adress | Email | Sex |
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Herbert | BeerAvenue 45 | herbert@names.org | Male | Anelise | SchmidtStree 21 | foo@bar.com | Female | XYZ | ZYX | ZY | XZ | etc... | that's it! |
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=head1 DESCRIPTION |
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XMLWriter is a Perl 5 object class, its purpose is to make writing XML |
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documents easier, cleaner, safer and standard conform. Its easier |
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because of the object oriented way XML documents are written with |
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XMLWriter. Its cleaner because of the simple but logical API and its |
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safe and standard conform because of the automatically done checking |
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against the the DTD. |
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But still: it might be a matter of taste whether one finds XMLWriter |
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usefull or not and it probably has some bugs (i would appreciate a lot |
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if you report them to me), many usefull features are missing, not |
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implemented or not even thought of and perhaps the API with all its |
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simpleness might be confusing though. So please tell me your opinion |
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and tell me the way how you would make XMLWriter better. Its not so |
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easy to develop a good API for this matter. |
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XMLWriter contains 3 packages: XMLWriter.pm which gives you the |
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document object, Element.pm which provides the element/tag objects and |
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PCData.pm which represents the parsed character data the document |
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contains. There'll probably come more objects in feature releases. |
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The most interesting class is Element.pm. It provides some methods you |
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can call on every document element, but besides those methods it uses |
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the I feature of perl to expect every not known method name |
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to be the name of a tag that should be added to the list of child tags |
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of the element the method is called on. So calling C<$html-Ehead> |
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will simply add a new element (the head element) to the list of child |
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tags of the html element. The head object is returned. Have a look at |
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the examples for better understanding. You should also read the POD of |
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Element.pm and PCdata.pm. |
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=head1 USING XML::XMLWriter |
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=head2 Encoding |
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All methods expect the data you pass them to be encoded in UTF8. So if |
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you take data with diffrent encoding call |
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I to make it UTF8. Finally the |
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whole document will be encoded in the document encoding (default: |
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UTF8) before being returned. |
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=head2 The Constructor |
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=head3 new ([ %conf ]) |
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The only argument can be a hash setting some configuration options: |
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=over |
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=item |
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version - XML version, defaults to I<1.0>, shouldn't be changed. |
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=item |
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encoding - Character encoding. Defaults to I. |
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=item |
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public - PUBLIC IDENTIFIER. Defaults to I<-//W3C//DTD XHTML 1.0 |
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Strict//EN>. |
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=item |
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system - SYSTEM IDENTIFIER (must always be a path/url pointing |
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to a valid dtd). Defaults to |
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I. |
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=item |
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standalone - sets the I option of the XML |
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declaration. Defaults to I, the only other possible value is |
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I. |
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=item |
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root - sets the name of the root element. Defaults to I. |
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=item |
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rootArgs - sets the list of arguments and their values for the |
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root element. Defaults to I<{}> (empty hash reference). |
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=item |
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intend - sets whether intentation should be done and if so how |
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many spaces per level. Defaults to 0, is not implemented yet, that |
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means setting it won't have any effect. |
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=item |
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checklm - the value of this option is passed to XML::ParseDTD |
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for setting its I parameter. Please the the documentation of |
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XML::ParseDTD for more information. Defaults to I<-1>. |
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=back |
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=cut |
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###################################################################### |
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sub new { |
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my ($class, %conf) = @_; |
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my $self = bless({}, ref($class) || $class); |
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$self->{Conf} = { |
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version => '1.0', |
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encoding => 'UTF8', |
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#encoding => 'ISO-8859-15', |
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public => '-//W3C//DTD XHTML 1.0 Strict//EN', |
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system => 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd', |
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standalone => 'no', |
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root => 'html', |
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rootArgs => {}, |
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#intend => 2, |
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intend => 0, |
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checklm => -1, |
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}; |
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local $_; |
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foreach $_ (keys(%conf)) { |
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$self->{Conf}->{$_} = $conf{$_}; |
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} |
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return $self; |
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} |
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###################################################################### |
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212
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=head2 Methods |
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=head3 createRoot ([$rootelem, %arguments, $character_data]) |
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Creates the root element and returns a I |
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object representing it. |
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Possible parameters: |
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=over |
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=item |
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1. The root elements name. Defaults to the value of the I |
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configuration option (see the C method). |
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=item |
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2. A hash of arguments for the root element and their |
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values. Defaults to the value of the I configuration option |
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(see the C method). |
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=item |
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3. A string of character data which will be appended right after |
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the start tag. Defaults to undef, which means no data will be added. |
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=back |
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241
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Instead of passing the third argument you can also just do a |
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C<$root-E_pcdata(yourdata)>, its exactly the same. |
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=cut |
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###################################################################### |
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248
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sub createRoot { |
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my ($self,$root,%args,$text) = @_; |
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$self->{dtd} = XML::ParseDTD->new($self->{Conf}->{system},checklm => $self->{Conf}->{checklm}) if($self->{Conf}->{system}); |
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$self->{root} = XML::XMLWriter::Element->new(($root||$self->{Conf}->{root}),$self->{dtd},(\%args||$self->{Conf}->{rootArgs}),$text); |
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return $self->{root}; |
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} |
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255
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###################################################################### |
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257
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=head3 get () |
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259
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Returns the XML document as a string. Every elements child list is |
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checked and a warning is produce if its not allowed by the DTD. |
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262
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=cut |
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###################################################################### |
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266
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sub get { |
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my ($self) = @_; |
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local $_ = '{Conf}->{version} . '" encoding="' . $self->{Conf}->{encoding} . '" standalone="' . $self->{Conf}->{standalone} . '"?>' . "\n"; |
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$_ .= '{Conf}->{root} . ($self->{Conf}->{public} ? ' PUBLIC "' . $self->{Conf}->{public} . '"' : '') . ($self->{Conf}->{system} ? ' SYSTEM "' . $self->{Conf}->{system} . '"' : '') . ">\n"; |
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return encode($self->{Conf}->{encoding},$_ . $self->{root}->_get()); |
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} |
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273
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###################################################################### |
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275
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=head3 print () |
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277
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Prints the XML document to STDOUT. |
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279
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=cut |
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281
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###################################################################### |
282
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283
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sub print { |
284
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my ($self,$html) = @_; |
285
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print $self->get($html); |
286
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} |
287
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288
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###################################################################### |
289
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290
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=head3 get_dtd () |
291
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292
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Returns the internally used C object. |
293
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294
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=cut |
295
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296
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###################################################################### |
297
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298
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sub get_dtd { |
299
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my($self) = @_; |
300
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return $self->{dtd}; |
301
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} |
302
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303
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return 1; |
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305
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__END__ |