=encoding utf8

=head1 NAME

OODoc::Format - base class for all OODoc formatters

=head1 INHERITANCE

 OODoc::Format
   is an OODoc::Object

 OODoc::Format is extended by
   OODoc::Format::Html
   OODoc::Format::Pod

=head1 SYNOPSIS

 # Never instantiated directly.

=head1 DESCRIPTION

A formater produces manual pages in some way or an other which contain
(parts of) the module documentation.  Each formatter class is based on
this OODoc::Format class, which should not be instantiated directly.
By far most users will never explicitly create a formatter by themselves:
it is created implicitly when L<OODoc::create()|OODoc/"Formatter"> is called on a L<OODoc|OODoc>
object.

Currently available formatters:

=over 4

=item * L<OODoc::Format::Pod|OODoc::Format::Pod>

Simple formatter, which has the layout of the produced POD manual pages
hard-coded in it's body.  The only way to adapt the structure of the
pages is by extending the class, and thereby overrule some of the
methods which produce the text.  Not much of a problem for experienced
Object Oriented programmers.

=item * L<OODoc::Format::Pod2|OODoc::Format::Pod2>

This formatter uses the same methods to generate the manual page as
defined by L<OODoc::Format::Pod|OODoc::Format::Pod>, but the general layout of the page
can be configured using templates.

You have to install L<Bundle::Template::Magic> to use this feature.

=item * L<OODoc::Format::Pod3|OODoc::Format::Pod3>

The whole formatter, implemented as template in L<OODoc::Template|OODoc::Template>, a
very light weighted template system.

You have to install L<OODoc::Template> to use this feature.

=item * L<OODoc::Format::Html|OODoc::Format::Html>

Produce HTML by filling in templates. This module requires
L<Bundle::Template::Magic> and the ability to run cgi scripts.

=back

Extends L<"DESCRIPTION" in OODoc::Object|OODoc::Object/"DESCRIPTION">.
 
=head1 OVERLOADED

Extends L<"OVERLOADED" in OODoc::Object|OODoc::Object/"OVERLOADED">.
 
=head1 METHODS

Extends L<"METHODS" in OODoc::Object|OODoc::Object/"METHODS">.
 
=head2 Constructors

Extends L<"Constructors" in OODoc::Object|OODoc::Object/"Constructors">.
 
=over 4

=item OODoc::Format-E<gt>B<new>(%options)

 -Option  --Default
  manifest  undef
  project   <required>
  version   <required>
  workdir   <required>

=over 2

=item manifest => OBJECT

=item project => STRING

The short name of this project (module), set by L<OODoc::new(project)|OODoc/"METHODS">.

=item version => STRING

Many manual pages will contain the version of the project.  This can
be any STRING, although blanks are not advised.

=item workdir => DIRECTORY

The DIRECTORY where the output will be placed.  If it does not exist,
it will be created for you.

=back

=back

=head2 Inheritance knowledge

Extends L<"Inheritance knowledge" in OODoc::Object|OODoc::Object/"Inheritance knowledge">.
 
=over 4

=item $obj-E<gt>B<extends>( [$object] )

Inherited, see L<OODoc::Object/"Inheritance knowledge">

=back

=head2 Attributes

=over 4

=item $obj-E<gt>B<manifest>()

Returns the L<OODoc::Manifest|OODoc::Manifest> object which maintains the names
of created files.

=item $obj-E<gt>B<project>()

Returns the name of this project.

=item $obj-E<gt>B<version>()

Returns the version string of this project.  This version may
contains any character, so should be handled with care.

=item $obj-E<gt>B<workdir>()

Returns the name of the work directory: the top location for all
the output files.

=back

=head2 Page generation

=over 4

=item $obj-E<gt>B<cleanup>($manual, STRING)

Takes the STRING and cleans it up to be in the right format for the
current formatter.  The cleaning up is parser dependent, and therefore
the parser of the manual is addressed to do the work.

=item $obj-E<gt>B<createManual>(%options)

 -Option        --Default
  append          undef
  format_options  []
  manual          <required>
  project         <required>
  template        undef

=over 2

=item append => STRING|CODE

=item format_options => ARRAY

An ARRAY which contains a list of options which are the defaults
for formatting a chapter.

=item manual => MANUAL

The manual to be formatted.

=item project => STRING

The name of this project, which will appear on many pages.

=item template => LOCATION

Some formatters support templates to descibe the output of the pages.
The valid values for this option differs per formatter.

=back

=item $obj-E<gt>B<createOtherPages>(%options)

Create other pages which come with the set of formatted manuals.  What
the contents of these pages is depends on the formatter.  Some formatters
simply ignore the functionality of this method as a whole: they do not
support data-files which are not manuals.

 -Option --Default
  process  undef
  source   undef

=over 2

=item process => REGEXP

Selects files to be processed from the source directory.  Other files
are copied without modification.  What happens with the selected
files is formatter dependent.

=item source => DIRECTORY

The location of the DIRECTORY which contains files which are part of
the produced set of documentation, but not copied per manual page
but only once.

=back

=item $obj-E<gt>B<showChapter>(%options)

You can pass all %options about formatting to this method.  They will passed
to the related methods.  So: the list of options you can pass here is much
longer: the combination of everything possible for all show* methods.

 -Option                    --Default
  chapter                     <required>
  manual                      <required>
  output                      <required>
  show_inherited_chapters     'REFER'
  show_inherited_sections     'REFER'
  show_inherited_subsections  'REFER'

=over 2

=item chapter => CHAPTER

=item manual => MANUAL

=item output => FILE

=item show_inherited_chapters => 'NO'|'REFER'|'EXPAND'

=item show_inherited_sections => 'NO'|'REFER'|'EXPAND'

REFER means that inherited sections are simply listed as reference
to the manual page which describes it.

=item show_inherited_subsections => 'NO'|'REFER'|'EXPAND'

=back

=item $obj-E<gt>B<showExamples>(%options)

 -Option  --Default
  examples  <required>
  manual    <required>
  output    <required>

=over 2

=item examples => ARRAY

=item manual => MANUAL

=item output => FILE

=back

=item $obj-E<gt>B<showOptionExpand>(%options)

 -Option --Default
  default  <required>
  manual   <required>
  option   <required>
  output   <required>

=over 2

=item default => OBJECT

=item manual => OBJECT

=item option => OBJECT

=item output => FILE

=back

=item $obj-E<gt>B<showOptionTable>(%options)

 -Option --Default
  manual   <required>
  options  <required>
  output   <required>

=over 2

=item manual => OBJECT

=item options => ARRAY

=item output => FILE

=back

=item $obj-E<gt>B<showOptionUse>(%options)

 -Option --Default
  default  <required>
  manual   <required>
  option   <required>
  output   <required>

=over 2

=item default => OBJECT

=item manual => OBJECT

=item option => OBJECT

=item output => FILE

=back

=item $obj-E<gt>B<showOptionalChapter>($name, %options)

=item $obj-E<gt>B<showOptions>(%options)

The options shown are B<not> the %options passed as argument, but the
options which belong to the subroutine being displayed.

 -Option                --Default
  manual                  <required>
  options                 <required>
  show_described_options  'EXPAND'
  show_inherited_options  'USE'

=over 2

=item manual => OBJECT

=item options => ARRAY

=item show_described_options => 'NO'|'LIST'|'USE'|'EXPAND'

=item show_inherited_options => 'NO'|'LIST'|'USE'|'EXPAND'

=back

=item $obj-E<gt>B<showRequiredChapter>($name, %options)

=item $obj-E<gt>B<showStructureExpanded>(%options)

 -Option               --Default
  show_chapter_examples  'EXPAND'

=over 2

=item show_chapter_examples => 'NO'|'EXPAND'

The I<chapter examples> are all examples which are not subroutine
related: examples which come at the end of a chapter, section, or
subsection.

=back

=item $obj-E<gt>B<showStructureRefer>(%options)

=item $obj-E<gt>B<showSubroutine>( <@> )

 -Option                --Default
  last                    0
  manual                  <required>
  output                  <selected filehandle>
  show_described_options  'EXPAND'
  show_diagnostics        'NO'
  show_examples           'EXPAND'
  show_inherited_options  'USE'
  show_option_table       'ALL'
  show_sub_description    'DESCRIBED'
  show_subroutine         'EXPAND'
  subroutine              <required>

=over 2

=item last => BOOLEAN

=item manual => MANUAL

=item output => FILE

=item show_described_options => 'NO'|'LIST'|'USE'|'EXPAND'

=item show_diagnostics => 'NO'|'EXPAND'

Diagnostics (error and warning messages) are defined per subroutine,
but are usually not listed with the subroutine.  The POD formatter's
default behavior, for instance, puts them all in a separate DIAGNOSTICS
chapter per manual page.

=item show_examples => 'NO'|'EXPAND'

=item show_inherited_options => 'NO'|'LIST'|'USE'|'EXPAND'

=item show_option_table => 'NO'|'INHERITED'|'DESCRIBED'|'ALL'

=item show_sub_description => 'NO'|'DESCRIBED'|'REFER'|'ALL'

Included the description of the use of the subroutines, which
comes before the options are being explained.  C<NO> will cause
the description to be ignored, C<DESCRIBED> means that only
text which was written in the manual-page at hand is included,
C<REFER> means that a reference to inherited documentation is
made, and with C<ALL> the inherited texts are expanded into this
file as well.

=item show_subroutine => 'NO'|'NAMES'|'USE'|'EXPAND'

=item subroutine => OBJECT

=back

=item $obj-E<gt>B<showSubroutineDescription>(%options)

 -Option    --Default
  manual      <required>
  output      <required>
  subroutine  <required>

=over 2

=item manual => OBJECT

=item output => FILE

=item subroutine => OBJECT

=back

=item $obj-E<gt>B<showSubroutineName>(%options)

 -Option    --Default
  last        0
  manual      <required>
  output      <required>
  subroutine  <required>

=over 2

=item last => BOOLEAN

=item manual => OBJECT

=item output => FILE

=item subroutine => OBJECT

=back

=item $obj-E<gt>B<showSubroutineUse>(%options)

 -Option    --Default
  manual      <required>
  output      <required>
  subroutine  <required>

=over 2

=item manual => OBJECT

=item output => FILE

=item subroutine => OBJECT

=back

=item $obj-E<gt>B<showSubroutines>(%options)

 -Option                --Default
  manual                  <required>
  output                  <selected filehandle>
  show_described_options  'EXPAND'
  show_described_subs     'EXPAND'
  show_diagnostics        'NO'
  show_examples           'EXPAND'
  show_inherited_options  'USE'
  show_inherited_subs     'USE'
  show_option_table       'ALL'
  show_subs_index         'NO'
  subroutines             []

=over 2

=item manual => MANUAL

=item output => FILE

=item show_described_options => 'NO'|'LIST'|'USE'|'EXPAND'

=item show_described_subs => 'NO'|'NAMES'|'USE'|'EXPAND'

=item show_diagnostics => 'NO'|'EXPAND'

=item show_examples => 'NO'|'EXPAND'

=item show_inherited_options => 'NO'|'LIST'|'USE'|'EXPAND'

=item show_inherited_subs => 'NO'|'NAMES'|'USE'|'EXPAND'

=item show_option_table => 'NO'|'DESCRIBED'|'INHERITED'|'ALL'

=item show_subs_index => 'NO'|'NAMES'|'USE'

=item subroutines => ARRAY

=back

=back

=head2 Commonly used functions

Extends L<"Commonly used functions" in OODoc::Object|OODoc::Object/"Commonly used functions">.
 
=over 4

=item $obj-E<gt>B<filenameToPackage>($filename)

=item OODoc::Format-E<gt>B<filenameToPackage>($filename)

Inherited, see L<OODoc::Object/"Commonly used functions">

=item $obj-E<gt>B<mkdirhier>($directory)

=item OODoc::Format-E<gt>B<mkdirhier>($directory)

Inherited, see L<OODoc::Object/"Commonly used functions">

=back

=head2 Manual Repository

Extends L<"Manual Repository" in OODoc::Object|OODoc::Object/"Manual Repository">.
 
=over 4

=item $obj-E<gt>B<addManual>($manual)

Inherited, see L<OODoc::Object/"Manual Repository">

=item $obj-E<gt>B<mainManual>($name)

Inherited, see L<OODoc::Object/"Manual Repository">

=item $obj-E<gt>B<manual>($name)

Inherited, see L<OODoc::Object/"Manual Repository">

=item $obj-E<gt>B<manuals>()

Inherited, see L<OODoc::Object/"Manual Repository">

=item $obj-E<gt>B<manualsForPackage>($name)

Inherited, see L<OODoc::Object/"Manual Repository">

=item $obj-E<gt>B<packageNames>()

Inherited, see L<OODoc::Object/"Manual Repository">

=back

=head1 DIAGNOSTICS

=over 4

=item Error: formatter does not know the version.

=item Error: formatter has no project name.

A formatter was created without a name specified for the project at
hand.  This should be passed with L<new(project)|OODoc::Format/"METHODS">.

=item Error: manual definition requires manual object

A call to L<addManual()|OODoc::Object/"Manual Repository"> expects a new manual object (a L<OODoc::Manual|OODoc::Manual>),
however an incompatible thing was passed.  Usually, intended was a call
to L<manualsForPackage()|OODoc::Object/"Manual Repository"> or L<mainManual()|OODoc::Object/"Manual Repository">.

=item Warning: missing required chapter $name in $manual

=item Error: no working directory specified.

The formatter has to know where the output can be written.  This
directory must be provided via L<new(workdir)|OODoc::Format/"METHODS">, but was not specified.

=item Warning: unknown subroutine type $type for $name in $manual

=back

=head1 SEE ALSO

This module is part of OODoc distribution version 2.02,
built on December 08, 2021. Website: F<http://perl.overmeer.net/oodoc/>

=head1 LICENSE

Copyrights 2003-2021 by [Mark Overmeer]. For other contributors see ChangeLog.

This program is free software; you can redistribute it and/or modify it
under the Artistic license.
See F<http://dev.perl.org/licenses/artistic.html>

