
=head1 NAME

HTML::FromMail::Message - output a message as HTML


=head1 INHERITANCE

 HTML::FromMail::Message
   is a HTML::FromMail::Page
   is a HTML::FromMail::Object
   is a Mail::Reporter


=head1 SYNOPSIS



=head1 DESCRIPTION

THIS MODULE IS UNDER CONSTRUCTION.  However, a lot of things already
work.  Best take a look at the examples directory.



=head1 METHODS


$obj-E<gt>B<createAttachment>(MESSAGE, PART, ARGS)

=over 4

Create an attachment file, and return a hash with information about
that file.  Returns C<undef> if creation fails.

This method is used by L<htmlAttach()|HTML::FromMail::Message/"METHODS"> and L<htmlPreview()|HTML::FromMail::Message/"METHODS"> to create
an actual attachment file.  It defines C<url>, C<size> and C<type>
tags for the template.

 Option  Defined in  Default   
 outdir              <required>

. outdir DIRECTORY

=over 4

The name of the directory where the external file will be produced
must be part of the ARGS hash.

=back

=back

$obj-E<gt>B<disposition>(MESSAGE, PART, ARGS)

=over 4

Returns a string, which is either C<inline>, C<attach>, or C<preview>,
which indicates how the part of the message should be formatted.
This can be changed with setting C<disposition>.

=back

$obj-E<gt>B<fields>

=over 4

Returns the field text producing object.

=back

$obj-E<gt>B<header>

=over 4

Returns the header text producting object.

=back

$obj-E<gt>B<htmlAddresses>(MESSAGE, ARGS)

=over 4

Produce data about addresses which are in the field.  This method uses
L<HTML::FromMail::Field::htmlAddresses()|HTML::FromMail::Field/"METHODS"> for that.

=back

$obj-E<gt>B<htmlAttach>

=over 4

The C<attach> container defines C<url>, C<size> and C<type>
tags for the template.

I<Example:> using L<HTML::FromMail::Format::Magic|HTML::FromMail::Format::Magic>


  <!--{message}-->
    <!--{attach}-->
    <!--{/attach}-->
  <!--{/message}-->

=back

$obj-E<gt>B<htmlBody>(MESSAGE, ARGS)

=over 4

Produce the body of a field.  This tag can only be used inside a field
container. See L<HTML::FromMail::Field::htmlBody()|HTML::FromMail::Field/"METHODS"> for the use and
options.

=back

$obj-E<gt>B<htmlField>(MESSAGE, ARGS)

=over 4

Returns the field definition for the currently active message part. When
the formatter sees this is a final token, then only the body of the
field is returned (and the options of L<HTML::FromMail::Field::htmlBody()|HTML::FromMail::Field/"METHODS">
are accepted as well).  Otherwise, the information about the field is
captured to be used later.

 Option  Defined in       Default           
 decode                   <true> if possible
 from                     PART              
 name                     <required>        

. decode BOOLEAN

. from PART|PARENT|MESSAGE

=over 4

The source of this field: the currently active PART (which may be the
main message), the PARENT of the active part (defaults to the message),
or the main MESSAGE itself.

=back

. name STRING

I<Example:> using L<HTML::FromMail::Format::Magic|HTML::FromMail::Format::Magic>


  <!--{field name => To, content => REFOLD, wrap => 20}-->

  <!--{field name => To}-->
     <!--{name capitals => WELLFORMED}-->
     <!--{body wrap => 30}-->
  <!--{/field}-->

=back

$obj-E<gt>B<htmlForeachPart>(MESSAGE, ARGS)

=over 4

Produces html for the parts of a multipart mesasge body.  Each part
may be a multipart too.  For each part, the C<message> container
code is applied recursively.

This container defines a C<part_number>, and enables the use of the
C<part> tag.

I<Example:> using L<HTML::FromMail::Format::Magic|HTML::FromMail::Format::Magic>


  <!--{message}-->
    <!--{multipart}-->
      <ul>
      <!--{foreachPart}-->
      <li>This is part <!--{part_number}-->
          <!--{part}-->
      </li>
      <!--{/foreachPart}-->
      </ul>
    <!--{/multipart}-->
  <!--{message}-->

=back

$obj-E<gt>B<htmlHead>(MESSAGE, ARGS)

=over 4

Defines the fields of a header.  The options are provided by
L<HTML::FromMail::Head::fields()|HTML::FromMail::Head/"METHODS">.

I<Example:> using L<HTML::FromMail::Format::Magic|HTML::FromMail::Format::Magic>


 # simple
 <pre><!--{head}--></pre>

 # complex
 <table>
 <!--{head remove_spam_groups => 0}-->
   <tr><td><!--{name}--></td>
       <td><!--{body}--></td></tr>
 <!--{/head}-->
 </table>

=back

$obj-E<gt>B<htmlInline>

=over 4

 Option  Defined in  Default
 type                ''     

. type MIME-TYPE

=over 4

Selects the MIME types which are handled by this singlepart block.  You can
specify the types as defined by MIME::Type subroutine equal.

=back

I<Example:> using L<HTML::FromMail::Format::Magic|HTML::FromMail::Format::Magic>


 <!--{message}-->
    <!--{inline type => text/html}-->
       <!--{html}-->
    <!--{/inline}-->
 <!--{/message}-->

=back

$obj-E<gt>B<htmlMessage>(MESSAGE, ARGS)

=over 4

Encapsulated code which is producing the message, which may
be a multipart.  You have to defined the message block when
you use the part (see L<htmlPart()|HTML::FromMail::Message/"METHODS">) tag.  If you do not use
that, you do not need this.

I<Example:> using L<HTML::FromMail::Format::Magic|HTML::FromMail::Format::Magic>


  <!--{message}-->
    <!--{inline}-->This is an inlined singlepart<!--{/inline}-->
    <!--{attach}-->This is an attachment<!--{/attach}-->
    <!--{preview}-->An attachment with preview<!--{/preview}-->
    <!--{multipart}-->This is a multipart<!--{/multipart}-->
    <!--{nested}-->message/rfc822 encapsulated<!--{/nested}-->
  <!--{/message}-->

=back

$obj-E<gt>B<htmlMultipart>(MESSAGE, ARGS)

=over 4

Encapsulates text to be produced when the message(-part) is a
multipart.

=back

$obj-E<gt>B<htmlName>(MESSAGE, ARGS)

=over 4

Produce the name of a field.  This tag can only be used inside a field
container. See L<HTML::FromMail::Field::htmlName()|HTML::FromMail::Field/"METHODS"> for the use and
options.

=back

$obj-E<gt>B<htmlNested>(MESSAGE, ARGS)

=over 4

Contains text to be produced when the message(-part) is a
nested message; encapsulated in a message/rfc822.

=back

$obj-E<gt>B<htmlPart>(MESSAGE, ARGS)

=over 4

Apply the C<message> container of the current part on its data.  See example
in L<htmlForeachPart()|HTML::FromMail::Message/"METHODS">.

=back

$obj-E<gt>B<htmlPreview>

=over 4

 Option  Defined in  Default
 type                ''     

. type MIME-TYPE

=over 4

Selects the MIME types which are handled by this singlepart block.  You can
specify the types as defined by MIME::Type subroutine equal.

The C<preview> container defines C<url>, C<size> and C<type>
tags for the template, which describe the attachment file.  Besides,
it preview defines a tag which tells whether the preview is made as
C<html> or as C<image>.  Within an C<html> block, you will get an
extra C<text> which includes the actual html preview text.

The C<image> container provides more tags: C<smallurl>,
C<smallwidth>, C<smallheight>, C<width>, and C<height>.

=back

I<Example:> using L<HTML::FromMail::Format::Magic|HTML::FromMail::Format::Magic>


  <!--{message}-->
    <!--{preview}-->
       <!--{html}-->
          <!--{text}-->
       <!--{/html}-->
       <!--{image}-->
          <img src="<!--{smallurl}-->"
           width="<!--{smallwidth}-->"
           height="<!--{smallheight}-->"><br />
           (real is <!--{width}--> x <!--{height}-->)
       <!--{/image}-->
       <a href="<!--{url}-->">Attachment of
        <!--{type}--> (<!--{size}--> bytes)</a>
    <!--{/preview}-->
  <!--{/message}-->

=back

$obj-E<gt>B<htmlRawText>(MESSAGE, ARGS)

=over 4

Returns the plain text of the body.

=back

$obj-E<gt>B<htmlSubject>(MESSAGE, ARGS)

=over 4

Get the subject field from the message's header, just a short-cut
for specifying L<htmlField(name)|HTML::FromMail::Message/"METHODS"> with C<subject>.

I<Example:> using L<HTML::FromMail::Format::Magic|HTML::FromMail::Format::Magic>


  <!--{subject}-->                # message subject
  <!--{field name => subject}-->  # part's subject
  <!--{field name => subject, from => MESSAGE}-->  # message subject

=back

$obj-E<gt>B<htmlifier>(MIME-TYPE)

=over 4

Returns the code reference for a routine which can create html
for the objects of the specified MIME-TYPE.  The TYPE may be a (smartly
overloaded) L<MIME::Type> object. The behaviour can be changed with
the C<htmlifiers> setting.

=back

$obj-E<gt>B<lookup>(LABEL, ARGS)

=over 4

See L<HTML::FromMail::Page/"METHODS">

=back

HTML::FromMail::Message-E<gt>B<new>(OPTIONS)

=over 4

 Option    Defined in       Default     
 settings  L<HTML::FromMail::Object>  {}          
 topic     L<HTML::FromMail::Object>  C<'message'>

. settings HASH-OF-HASHES

. topic STRING

=back

$obj-E<gt>B<previewer>(MIME-TYPE)

=over 4

Returns the code reference for a routine which can create a preview
for the objects of the specified MIME-TYPE.  The TYPE may be a (smartly
overloaded) L<MIME::Type> object.  The behaviour can be changed with
the C<previewers> setting.

=back

=head2 Attributes


$obj-E<gt>B<settings>([TOPIC])

=over 4

See L<HTML::FromMail::Object/"Attributes">

=back

$obj-E<gt>B<topic>

=over 4

See L<HTML::FromMail::Object/"Attributes">

=back

=head2 Export


=head2 Other methods


$obj-E<gt>B<plain2html>(STRING)

=over 4

See L<HTML::FromMail::Object/"Other methods">

=back



=head1 DIAGNOSTICS

I<Error:> No field name specified in $template


I<Error:> foreachPart not used within part


I<Error:> foreachPart outside multipart


I<Error:> use of 'addresses' outside field container


I<Error:> use of 'body' outside field container


I<Error:> use of 'name' outside field container



=head1 DETAILS


=head2 Settings

You can specify the following settings in L<HTML::FromMail::new(settings)|HTML::FromMail/"Constructors">
for topic C<message>:

=head3 disposition CODE

Message parts have to be displayed.  There are a few ways to do that: by
C<inline>, C<attach>, and C<preview>.  In the first case, the text of the
part is inserted in the main page, in the other two as link to an external
file.  The latter is creating a small preview of the attachement.

The message may provide an indication of the way the part should be
displayed in the C<Content-Disposition> field. For many reasons, an
exception will be made... for instance, binary messages will never be
inlined.  You can create your own code reference to change the behavior
of the default algorithm.

I<Example:> of own disposition rules


 my $f = HTML::FromMail->new
  ( settings =>
      { message => { disposition => \&my_disposer }
      }
  );

 sub my_disposer($$$$$)
 {   my ($obj, $message, $part, $suggestion, $args) = @_;

     return 'attach'
        if $suggestion eq 'inline' && $part->size > 10_000;
     $suggestion;
 }

=head3 previewers ARRAY-OF-PAIRS

For some kinds of message parts, previews can be produced.  This ordered
list of PAIRS contains mime type with code reference combinations, each
describing such a production.  The specified items are added before the
default list of preview generators.  An C<undef> as code reference will
cause the default preview producer to be disabled.

Method L<previewer()|HTML::FromMail::Message/"METHODS"> is called when a previewer for a certain content
type has to be looked-up.  The default previewers are defined (and
implemented) in HTML::FromMail::Default::Previewers.

=head3 htmlifiers ARRAY-OF-PAIRS

Some kinds of information can be translated into HTML.  When a data
type defines such a translation, it may be inlined (see L<htmlInline()|HTML::FromMail::Message/"METHODS">),
where in other cases it will get attached.  The usage is the same as
for the C<previewers> option.

Method L<htmlifier()|HTML::FromMail::Message/"METHODS"> is called when a htmlifier for a certain content
type has to be looked-up.  The default htmlifiers are defined (and
implemented) in HTML::FromMail::Default::HTMLifiers.

I<Example:> use own converters


 my @prevs = ( 'text/postscript' => \&prepost
             , 'image'           => \&imagemagick
             );
 my @html  = ( 'text/html'       => \&strip_html
             , 'text/plain'      => \&plain2html
             );

 my $f = HTML::FromMail->new
  ( settings =>
      { message => { previewers  => \@prevs
                   , htmlifiers  => \@html
                   , disposition => \&my_disposer
                   }
      }
  );

 sub prepost($$$$$)
 {   my ($page, $message, $part, $attach, $args) = @_;
     # args contains extra info from template
     # returns a hash of info which is used in a
     # preview block (see htmlPreview())
 }





=head1 REFERENCES

See the HTML::FromMail website at L<http://perl.overmeer.net/html-from-mail/> for more details.

=head1 COPYRIGHTS

Module version 0.01.
Written by Mark Overmeer (mark@overmeer.net).  See the ChangeLog for
other contributors.

Copyright (c) 2003 by the author(s). All rights reserved.  This program
is free software; you can redistribute it and/or modify it under the
same terms as Perl itself.


