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- package Pod::LaTeX;
-
- =head1 NAME
-
- Pod::LaTeX - Convert Pod data to formatted Latex
-
- =head1 SYNOPSIS
-
- use Pod::LaTeX;
- my $parser = Pod::LaTeX->new ( );
-
- $parser->parse_from_filehandle;
-
- $parser->parse_from_file ('file.pod', 'file.tex');
-
- =head1 DESCRIPTION
-
- C<Pod::LaTeX> is a module to convert documentation in the Pod format
- into Latex. The L<B<pod2latex>|pod2latex> X<pod2latex> command uses
- this module for translation.
-
- C<Pod::LaTeX> is a derived class from L<Pod::Select|Pod::Select>.
-
- =cut
-
-
- use strict;
- require Pod::ParseUtils;
- use base qw/ Pod::Select /;
-
- # use Data::Dumper; # for debugging
- use Carp;
-
- use vars qw/ $VERSION %HTML_Escapes @LatexSections /;
-
- $VERSION = '0.54';
-
- # Definitions of =headN -> latex mapping
- @LatexSections = (qw/
- chapter
- section
- subsection
- subsubsection
- paragraph
- subparagraph
- /);
-
- # Standard escape sequences converted to Latex
- # Up to "yuml" these are taken from the original pod2latex
- # command written by Taro Kawagish (kawagish@imslab.co.jp)
-
-
- %HTML_Escapes = (
- # lt, gt and verbar are inserted without math mode
- # since the $$ will be added during general correction
- # for those escape characters
- 'amp' => '\&', # ampersand
- 'lt' => '<', # ' left chevron, less-than
- 'gt' => '>', # ' right chevron, greater-than
- 'quot' => '"', # double quote
- 'sol' => '/',
- 'verbar' => '|',
-
- "Aacute" => "\\'{A}", # capital A, acute accent
- "aacute" => "\\'{a}", # small a, acute accent
- "Acirc" => "\\^{A}", # capital A, circumflex accent
- "acirc" => "\\^{a}", # small a, circumflex accent
- "AElig" => '\\AE', # capital AE diphthong (ligature)
- "aelig" => '\\ae', # small ae diphthong (ligature)
- "Agrave" => "\\`{A}", # capital A, grave accent
- "agrave" => "\\`{a}", # small a, grave accent
- "Aring" => '\\u{A}', # capital A, ring
- "aring" => '\\u{a}', # small a, ring
- "Atilde" => '\\~{A}', # capital A, tilde
- "atilde" => '\\~{a}', # small a, tilde
- "Auml" => '\\"{A}', # capital A, dieresis or umlaut mark
- "auml" => '\\"{a}', # small a, dieresis or umlaut mark
- "Ccedil" => '\\c{C}', # capital C, cedilla
- "ccedil" => '\\c{c}', # small c, cedilla
- "Eacute" => "\\'{E}", # capital E, acute accent
- "eacute" => "\\'{e}", # small e, acute accent
- "Ecirc" => "\\^{E}", # capital E, circumflex accent
- "ecirc" => "\\^{e}", # small e, circumflex accent
- "Egrave" => "\\`{E}", # capital E, grave accent
- "egrave" => "\\`{e}", # small e, grave accent
- "ETH" => '\\OE', # capital Eth, Icelandic
- "eth" => '\\oe', # small eth, Icelandic
- "Euml" => '\\"{E}', # capital E, dieresis or umlaut mark
- "euml" => '\\"{e}', # small e, dieresis or umlaut mark
- "Iacute" => "\\'{I}", # capital I, acute accent
- "iacute" => "\\'{i}", # small i, acute accent
- "Icirc" => "\\^{I}", # capital I, circumflex accent
- "icirc" => "\\^{i}", # small i, circumflex accent
- "Igrave" => "\\`{I}", # capital I, grave accent
- "igrave" => "\\`{i}", # small i, grave accent
- "Iuml" => '\\"{I}', # capital I, dieresis or umlaut mark
- "iuml" => '\\"{i}', # small i, dieresis or umlaut mark
- "Ntilde" => '\\~{N}', # capital N, tilde
- "ntilde" => '\\~{n}', # small n, tilde
- "Oacute" => "\\'{O}", # capital O, acute accent
- "oacute" => "\\'{o}", # small o, acute accent
- "Ocirc" => "\\^{O}", # capital O, circumflex accent
- "ocirc" => "\\^{o}", # small o, circumflex accent
- "Ograve" => "\\`{O}", # capital O, grave accent
- "ograve" => "\\`{o}", # small o, grave accent
- "Oslash" => "\\O", # capital O, slash
- "oslash" => "\\o", # small o, slash
- "Otilde" => "\\~{O}", # capital O, tilde
- "otilde" => "\\~{o}", # small o, tilde
- "Ouml" => '\\"{O}', # capital O, dieresis or umlaut mark
- "ouml" => '\\"{o}', # small o, dieresis or umlaut mark
- "szlig" => '\\ss{}', # small sharp s, German (sz ligature)
- "THORN" => '\\L', # capital THORN, Icelandic
- "thorn" => '\\l',, # small thorn, Icelandic
- "Uacute" => "\\'{U}", # capital U, acute accent
- "uacute" => "\\'{u}", # small u, acute accent
- "Ucirc" => "\\^{U}", # capital U, circumflex accent
- "ucirc" => "\\^{u}", # small u, circumflex accent
- "Ugrave" => "\\`{U}", # capital U, grave accent
- "ugrave" => "\\`{u}", # small u, grave accent
- "Uuml" => '\\"{U}', # capital U, dieresis or umlaut mark
- "uuml" => '\\"{u}', # small u, dieresis or umlaut mark
- "Yacute" => "\\'{Y}", # capital Y, acute accent
- "yacute" => "\\'{y}", # small y, acute accent
- "yuml" => '\\"{y}', # small y, dieresis or umlaut mark
-
- # Added by TimJ
-
- "iexcl" => '!`', # inverted exclamation mark
- # "cent" => ' ', # cent sign
- "pound" => '\pounds', # (UK) pound sign
- # "curren" => ' ', # currency sign
- # "yen" => ' ', # yen sign
- # "brvbar" => ' ', # broken vertical bar
- "sect" => '\S', # section sign
- "uml" => '\"{}', # diaresis
- "copy" => '\copyright', # Copyright symbol
- # "ordf" => ' ', # feminine ordinal indicator
- "laquo" => '$\ll$', # ' # left pointing double angle quotation mark
- "not" => '$\neg$', # ' # not sign
- "shy" => '-', # soft hyphen
- # "reg" => ' ', # registered trademark
- "macr" => '$^-$', # ' # macron, overline
- "deg" => '$^\circ$', # ' # degree sign
- "plusmn" => '$\pm$', # ' # plus-minus sign
- "sup2" => '$^2$', # ' # superscript 2
- "sup3" => '$^3$', # ' # superscript 3
- "acute" => "\\'{}", # acute accent
- "micro" => '$\mu$', # micro sign
- "para" => '\P', # pilcrow sign = paragraph sign
- "middot" => '$\cdot$', # middle dot = Georgian comma
- "cedil" => '\c{}', # cedilla
- "sup1" => '$^1$', # ' # superscript 1
- # "ordm" => ' ', # masculine ordinal indicator
- "raquo" => '$\gg$', # ' # right pointing double angle quotation mark
- "frac14" => '$\frac{1}{4}$', # ' # vulgar fraction one quarter
- "frac12" => '$\frac{1}{2}$', # ' # vulgar fraction one half
- "frac34" => '$\frac{3}{4}$', # ' # vulgar fraction three quarters
- "iquest" => "?'", # inverted question mark
- "times" => '$\times$', # ' # multiplication sign
- "divide" => '$\div$', # division sign
-
- # Greek letters using HTML codes
- "alpha" => '$\alpha$', # '
- "beta" => '$\beta$', # '
- "gamma" => '$\gamma$', # '
- "delta" => '$\delta$', # '
- "epsilon"=> '$\epsilon$', # '
- "zeta" => '$\zeta$', # '
- "eta" => '$\eta$', # '
- "theta" => '$\theta$', # '
- "iota" => '$\iota$', # '
- "kappa" => '$\kappa$', # '
- "lambda" => '$\lambda$', # '
- "mu" => '$\mu$', # '
- "nu" => '$\nu$', # '
- "xi" => '$\xi$', # '
- "omicron"=> '$o$', # '
- "pi" => '$\pi$', # '
- "rho" => '$\rho$', # '
- "sigma" => '$\sigma$', # '
- "tau" => '$\tau$', # '
- "upsilon"=> '$\upsilon$', # '
- "phi" => '$\phi$', # '
- "chi" => '$\chi$', # '
- "psi" => '$\psi$', # '
- "omega" => '$\omega$', # '
-
- "Alpha" => '$A$', # '
- "Beta" => '$B$', # '
- "Gamma" => '$\Gamma$', # '
- "Delta" => '$\Delta$', # '
- "Epsilon"=> '$E$', # '
- "Zeta" => '$Z$', # '
- "Eta" => '$H$', # '
- "Theta" => '$\Theta$', # '
- "Iota" => '$I$', # '
- "Kappa" => '$K$', # '
- "Lambda" => '$\Lambda$', # '
- "Mu" => '$M$', # '
- "Nu" => '$N$', # '
- "Xi" => '$\Xi$', # '
- "Omicron"=> '$O$', # '
- "Pi" => '$\Pi$', # '
- "Rho" => '$R$', # '
- "Sigma" => '$\Sigma$', # '
- "Tau" => '$T$', # '
- "Upsilon"=> '$\Upsilon$', # '
- "Phi" => '$\Phi$', # '
- "Chi" => '$X$', # '
- "Psi" => '$\Psi$', # '
- "Omega" => '$\Omega$', # '
-
-
- );
-
-
- =head1 OBJECT METHODS
-
- The following methods are provided in this module. Methods inherited
- from C<Pod::Select> are not described in the public interface.
-
- =over 4
-
- =begin __PRIVATE__
-
- =item C<initialize>
-
- Initialise the object. This method is subclassed from C<Pod::Parser>.
- The base class method is invoked. This method defines the default
- behaviour of the object unless overridden by supplying arguments to
- the constructor.
-
- Internal settings are defaulted as well as the public instance data.
- Internal hash values are accessed directly (rather than through
- a method) and start with an underscore.
-
- This method should not be invoked by the user directly.
-
- =end __PRIVATE__
-
- =cut
-
-
-
- # - An array for nested lists
-
- # Arguments have already been read by this point
-
- sub initialize {
- my $self = shift;
-
- # print Dumper($self);
-
- # Internals
- $self->{_Lists} = []; # For nested lists
- $self->{_suppress_all_para} = 0; # For =begin blocks
- $self->{_dont_modify_any_para}=0; # For =begin blocks
- $self->{_CURRENT_HEAD1} = ''; # Name of current HEAD1 section
-
- # Options - only initialise if not already set
-
- # Cause the '=head1 NAME' field to be treated specially
- # The contents of the NAME paragraph will be converted
- # to a section title. All subsequent =head1 will be converted
- # to =head2 and down. Will not affect =head1's prior to NAME
- # Assumes: 'Module - purpose' format
- # Also creates a purpose field
- # The name is used for Labeling of the subsequent subsections
- $self->{ReplaceNAMEwithSection} = 0
- unless exists $self->{ReplaceNAMEwithSection};
- $self->{AddPreamble} = 1 # make full latex document
- unless exists $self->{AddPreamble};
- $self->{StartWithNewPage} = 0 # Start new page for pod section
- unless exists $self->{StartWithNewPage};
- $self->{TableOfContents} = 0 # Add table of contents
- unless exists $self->{TableOfContents}; # only relevent if AddPreamble=1
- $self->{AddPostamble} = 1 # Add closing latex code at end
- unless exists $self->{AddPostamble}; # effectively end{document} and index
- $self->{MakeIndex} = 1 # Add index (only relevant AddPostamble
- unless exists $self->{MakeIndex}; # and AddPreamble)
-
- $self->{UniqueLabels} = 1 # Use label unique for each pod
- unless exists $self->{UniqueLabels}; # either based on the filename
- # or supplied
-
- # Control the level of =head1. default is \section
- #
- $self->{Head1Level} = 1 # Offset in latex sections
- unless exists $self->{Head1Level}; # 0 is chapter, 2 is subsection
-
- # Control at which level numbering of sections is turned off
- # ie subsection becomes subsection*
- # The numbering is relative to the latex sectioning commands
- # and is independent of Pod heading level
- # default is to number \section but not \subsection
- $self->{LevelNoNum} = 2
- unless exists $self->{LevelNoNum};
-
- # Label to be used as prefix to all internal section names
- # If not defined will attempt to derive it from the filename
- # This can not happen when running parse_from_filehandle though
- # hence the ability to set the label externally
- # The label could then be Pod::Parser_DESCRIPTION or somesuch
-
- $self->{Label} = undef # label to be used as prefix
- unless exists $self->{Label}; # to all internal section names
-
- # These allow the caller to add arbritrary latex code to
- # start and end of document. AddPreamble and AddPostamble are ignored
- # if these are set.
- # Also MakeIndex and TableOfContents are also ignored.
- $self->{UserPreamble} = undef # User supplied start (AddPreamble =1)
- unless exists $self->{Label};
- $self->{UserPostamble} = undef # Use supplied end (AddPostamble=1)
- unless exists $self->{Label};
-
- # Run base initialize
- $self->SUPER::initialize;
-
- }
-
- =back
-
- =head2 Data Accessors
-
- The following methods are provided for accessing instance data. These
- methods should be used for accessing configuration parameters rather
- than assuming the object is a hash.
-
- Default values can be supplied by using these names as keys to a hash
- of arguments when using the C<new()> constructor.
-
- =over 4
-
- =item B<AddPreamble>
-
- Logical to control whether a C<latex> preamble is to be written.
- If true, a valid C<latex> preamble is written before the pod data
- is written. This is similar to:
-
- \documentclass{article}
- \begin{document}
-
- but will be more complicated if table of contents and indexing are required.
- Can be used to set or retrieve the current value.
-
- $add = $parser->AddPreamble();
- $parser->AddPreamble(1);
-
- If used in conjunction with C<AddPostamble> a full latex document will
- be written that could be immediately processed by C<latex>.
-
- =cut
-
- sub AddPreamble {
- my $self = shift;
- if (@_) {
- $self->{AddPreamble} = shift;
- }
- return $self->{AddPreamble};
- }
-
- =item B<AddPostamble>
-
- Logical to control whether a standard C<latex> ending is written to
- the output file after the document has been processed. In its
- simplest form this is simply:
-
- \end{document}
-
- but can be more complicated if an index is required.
- Can be used to set or retrieve the current value.
-
- $add = $parser->AddPostamble();
- $parser->AddPostamble(1);
-
- If used in conjunction with C<AddPreaamble> a full latex document will
- be written that could be immediately processed by C<latex>.
-
- =cut
-
- sub AddPostamble {
- my $self = shift;
- if (@_) {
- $self->{AddPostamble} = shift;
- }
- return $self->{AddPostamble};
- }
-
- =item B<Head1Level>
-
- The C<latex> sectioning level that should be used to correspond to
- a pod C<=head1> directive. This can be used, for example, to turn
- a C<=head1> into a C<latex> C<subsection>. This should hold a number
- corresponding to the required position in an array containing the
- following elements:
-
- [0] chapter
- [1] section
- [2] subsection
- [3] subsubsection
- [4] paragraph
- [5] subparagraph
-
- Can be used to set or retrieve the current value:
-
- $parser->Head1Level(2);
- $sect = $parser->Head1Level;
-
- Setting this number too high can result in sections that may not be
- reproducible in the expected way. For example, setting this to 4 would
- imply that C<=head3> do not have a corresponding C<latex> section
- (C<=head1> would correspond to a C<paragraph>).
-
- A check is made to ensure that the supplied value is an integer in the
- range 0 to 5.
-
- Default is for a value of 1 (i.e. a C<section>).
-
- =cut
-
- sub Head1Level {
- my $self = shift;
- if (@_) {
- my $arg = shift;
- if ($arg =~ /^\d$/ && $arg <= $#LatexSections) {
- $self->{Head1Level} = $arg;
- } else {
- carp "Head1Level supplied ($arg) must be integer in range 0 to ".$#LatexSections . "- Ignoring\n";
- }
- }
- return $self->{Head1Level};
- }
-
- =item B<Label>
-
- This is the label that is prefixed to all C<latex> label and index
- entries to make them unique. In general, pods have similarly titled
- sections (NAME, DESCRIPTION etc) and a C<latex> label will be multiply
- defined if more than one pod document is to be included in a single
- C<latex> file. To overcome this, this label is prefixed to a label
- whenever a label is required (joined with an underscore) or to an
- index entry (joined by an exclamation mark which is the normal index
- separator). For example, C<\label{text}> becomes C<\label{Label_text}>.
-
- Can be used to set or retrieve the current value:
-
- $label = $parser->Label;
- $parser->Label($label);
-
- This label is only used if C<UniqueLabels> is true.
- Its value is set automatically from the C<NAME> field
- if C<ReplaceNAMEwithSection> is true. If this is not the case
- it must be set manually before starting the parse.
-
- Default value is C<undef>.
-
- =cut
-
- sub Label {
- my $self = shift;
- if (@_) {
- $self->{Label} = shift;
- }
- return $self->{Label};
- }
-
- =item B<LevelNoNum>
-
- Control the point at which C<latex> section numbering is turned off.
- For example, this can be used to make sure that C<latex> sections
- are numbered but subsections are not.
-
- Can be used to set or retrieve the current value:
-
- $lev = $parser->LevelNoNum;
- $parser->LevelNoNum(2);
-
- The argument must be an integer between 0 and 5 and is the same as the
- number described in C<Head1Level> method description. The number has
- nothing to do with the pod heading number, only the C<latex> sectioning.
-
- Default is 2. (i.e. C<latex> subsections are written as C<subsection*>
- but sections are numbered).
-
- =cut
-
- sub LevelNoNum {
- my $self = shift;
- if (@_) {
- $self->{LevelNoNum} = shift;
- }
- return $self->{LevelNoNum};
- }
-
- =item B<MakeIndex>
-
- Controls whether C<latex> commands for creating an index are to be inserted
- into the preamble and postamble
-
- $makeindex = $parser->MakeIndex;
- $parser->MakeIndex(0);
-
- Irrelevant if both C<AddPreamble> and C<AddPostamble> are false
- (or equivalently, C<UserPreamble> and C<UserPostamble> are set).
-
- Default is for an index to be created.
-
- =cut
-
- sub MakeIndex {
- my $self = shift;
- if (@_) {
- $self->{MakeIndex} = shift;
- }
- return $self->{MakeIndex};
- }
-
- =item B<ReplaceNAMEwithSection>
-
- This controls whether the C<NAME> section in the pod is to be translated
- literally or converted to a slightly modified output where the section
- name is the pod name rather than "NAME".
-
- If true, the pod segment
-
- =head1 NAME
-
- pod::name - purpose
-
- =head1 SYNOPSIS
-
- is converted to the C<latex>
-
- \section{pod::name\label{pod_name}\index{pod::name}}
-
- Purpose
-
- \subsection*{SYNOPSIS\label{pod_name_SYNOPSIS}%
- \index{pod::name!SYNOPSIS}}
-
- (dependent on the value of C<Head1Level> and C<LevelNoNum>). Note that
- subsequent C<head1> directives translate to subsections rather than
- sections and that the labels and index now include the pod name (dependent
- on the value of C<UniqueLabels>).
-
- The C<Label> is set from the pod name regardless of any current value
- of C<Label>.
-
- $mod = $parser->ReplaceNAMEwithSection;
- $parser->ReplaceNAMEwithSection(0);
-
- Default is to translate the pod literally.
-
- =cut
-
- sub ReplaceNAMEwithSection {
- my $self = shift;
- if (@_) {
- $self->{ReplaceNAMEwithSection} = shift;
- }
- return $self->{ReplaceNAMEwithSection};
- }
-
- =item B<StartWithNewPage>
-
- If true, each pod translation will begin with a C<latex>
- C<\clearpage>.
-
- $parser->StartWithNewPage(1);
- $newpage = $parser->StartWithNewPage;
-
- Default is false.
-
- =cut
-
- sub StartWithNewPage {
- my $self = shift;
- if (@_) {
- $self->{StartWithNewPage} = shift;
- }
- return $self->{StartWithNewPage};
- }
-
- =item B<TableOfContents>
-
- If true, a table of contents will be created.
- Irrelevant if C<AddPreamble> is false or C<UserPreamble>
- is set.
-
- $toc = $parser->TableOfContents;
- $parser->TableOfContents(1);
-
- Default is false.
-
- =cut
-
- sub TableOfContents {
- my $self = shift;
- if (@_) {
- $self->{TableOfContents} = shift;
- }
- return $self->{TableOfContents};
- }
-
- =item B<UniqueLabels>
-
- If true, the translator will attempt to make sure that
- each C<latex> label or index entry will be uniquely identified
- by prefixing the contents of C<Label>. This allows
- multiple documents to be combined without clashing
- common labels such as C<DESCRIPTION> and C<SYNOPSIS>
-
- $parser->UniqueLabels(1);
- $unq = $parser->UniqueLabels;
-
- Default is true.
-
- =cut
-
- sub UniqueLabels {
- my $self = shift;
- if (@_) {
- $self->{UniqueLabels} = shift;
- }
- return $self->{UniqueLabels};
- }
-
- =item B<UserPreamble>
-
- User supplied C<latex> preamble. Added before the pod translation
- data.
-
- If set, the contents will be prepended to the output file before
- the translated data regardless of the value of C<AddPreamble>.
- C<MakeIndex> and C<TableOfContents> will also be ignored.
-
- =cut
-
- sub UserPreamble {
- my $self = shift;
- if (@_) {
- $self->{UserPreamble} = shift;
- }
- return $self->{UserPreamble};
- }
-
- =item B<UserPostamble>
-
- User supplied C<latex> postamble. Added after the pod translation
- data.
-
- If set, the contents will be prepended to the output file after
- the translated data regardless of the value of C<AddPostamble>.
- C<MakeIndex> will also be ignored.
-
- =cut
-
- sub UserPostamble {
- my $self = shift;
- if (@_) {
- $self->{UserPostamble} = shift;
- }
- return $self->{UserPostamble};
- }
-
- =begin __PRIVATE__
-
- =item B<Lists>
-
- Contains details of the currently active lists.
- The array contains C<Pod::List> objects. A new C<Pod::List>
- object is created each time a list is encountered and it is
- pushed onto this stack. When the list context ends, it
- is popped from the stack. The array will be empty if no
- lists are active.
-
- Returns array of list information in list context
- Returns array ref in scalar context
-
- =cut
-
-
-
- sub lists {
- my $self = shift;
- return @{ $self->{_Lists} } if wantarray();
- return $self->{_Lists};
- }
-
- =end __PRIVATE__
-
- =back
-
- =begin __PRIVATE__
-
- =head2 Subclassed methods
-
- The following methods override methods provided in the C<Pod::Select>
- base class. See C<Pod::Parser> and C<Pod::Select> for more information
- on what these methods require.
-
- =over 4
-
- =cut
-
- ######### END ACCESSORS ###################
-
- # Opening pod
-
- =item B<begin_pod>
-
- Writes the C<latex> preamble if requested.
-
- =cut
-
- sub begin_pod {
- my $self = shift;
-
- # Get the pod identification
- # This should really come from the '=head1 NAME' paragraph
-
- my $infile = $self->input_file;
- my $class = ref($self);
- my $date = gmtime(time);
-
- # Comment message to say where this came from
- my $comment = << "__TEX_COMMENT__";
- %% Latex generated from POD in document $infile
- %% Using the perl module $class
- %% Converted on $date
- __TEX_COMMENT__
-
- # Write the preamble
- # If the caller has supplied one then we just use that
-
- my $preamble = '';
- if (defined $self->UserPreamble) {
-
- $preamble = $self->UserPreamble;
-
- # Add the description of where this came from
- $preamble .= "\n$comment";
-
-
- } elsif ($self->AddPreamble) {
- # Write our own preamble
-
- # Code to initialise index making
- # Use an array so that we can prepend comment if required
- my @makeidx = (
- '\usepackage{makeidx}',
- '\makeindex',
- );
-
- unless ($self->MakeIndex) {
- foreach (@makeidx) {
- $_ = '%% ' . $_;
- }
- }
- my $makeindex = join("\n",@makeidx) . "\n";
-
-
- # Table of contents
- my $tableofcontents = '\tableofcontents';
-
- $tableofcontents = '%% ' . $tableofcontents
- unless $self->TableOfContents;
-
- # Roll our own
- $preamble = << "__TEX_HEADER__";
- \\documentclass{article}
-
- $comment
-
- $makeindex
-
- \\begin{document}
-
- $tableofcontents
-
- __TEX_HEADER__
-
- }
-
- # Write the header (blank if none)
- $self->_output($preamble);
-
- # Start on new page if requested
- $self->_output("\\clearpage\n") if $self->StartWithNewPage;
-
- }
-
-
- =item B<end_pod>
-
- Write the closing C<latex> code.
-
- =cut
-
- sub end_pod {
- my $self = shift;
-
- # End string
- my $end = '';
-
- # Use the user version of the postamble if deinfed
- if (defined $self->UserPostamble) {
- $end = $self->UserPostamble;
-
- $self->_output($end);
-
- } elsif ($self->AddPostamble) {
-
- # Check for index
- my $makeindex = '\printindex';
-
- $makeindex = '%% '. $makeindex unless $self->MakeIndex;
-
- $end = "$makeindex\n\n\\end{document}\n";
- }
-
-
- $self->_output($end);
-
- }
-
- =item B<command>
-
- Process basic pod commands.
-
- =cut
-
- sub command {
- my $self = shift;
- my ($command, $paragraph, $line_num, $parobj) = @_;
-
- # return if we dont care
- return if $command eq 'pod';
-
- # Store a copy of the raw text in case we are in a =for
- # block and need to preserve the existing latex
- my $rawpara = $paragraph;
-
- # Do the latex escapes
- $paragraph = $self->_replace_special_chars($paragraph);
-
- # Interpolate pod sequences in paragraph
- $paragraph = $self->interpolate($paragraph, $line_num);
- $paragraph =~ s/\s+$//;
-
- # Replace characters that can only be done after
- # interpolation of interior sequences
- $paragraph = $self->_replace_special_chars_late($paragraph);
-
- # Now run the command
- if ($command eq 'over') {
-
- $self->begin_list($paragraph, $line_num);
-
- } elsif ($command eq 'item') {
-
- $self->add_item($paragraph, $line_num);
-
- } elsif ($command eq 'back') {
-
- $self->end_list($line_num);
-
- } elsif ($command eq 'head1') {
-
- # Store the name of the section
- $self->{_CURRENT_HEAD1} = $paragraph;
-
- # Print it
- $self->head(1, $paragraph, $parobj);
-
- } elsif ($command eq 'head2') {
-
- $self->head(2, $paragraph, $parobj);
-
- } elsif ($command eq 'head3') {
-
- $self->head(3, $paragraph, $parobj);
-
- } elsif ($command eq 'head4') {
-
- $self->head(4, $paragraph, $parobj);
-
- } elsif ($command eq 'head5') {
-
- $self->head(5, $paragraph, $parobj);
-
- } elsif ($command eq 'head6') {
-
- $self->head(6, $paragraph, $parobj);
-
- } elsif ($command eq 'begin') {
-
- # pass through if latex
- if ($paragraph =~ /^latex/i) {
- # Make sure that subsequent paragraphs are not modfied before printing
- $self->{_dont_modify_any_para} = 1;
-
- } else {
- # Suppress all subsequent paragraphs unless
- # it is explcitly intended for latex
- $self->{_suppress_all_para} = 1;
- }
-
- } elsif ($command eq 'for') {
-
- # =for latex
- # some latex
-
- # With =for we will get the text for the full paragraph
- # as well as the format name.
- # We do not get an additional paragraph later on. The next
- # paragraph is not governed by the =for
-
- # The first line contains the format and the rest is the
- # raw code.
- my ($format, $chunk) = split(/\n/, $rawpara, 2);
-
- # If we have got some latex code print it out immediately
- # unmodified. Else do nothing.
- if ($format =~ /^latex/i) {
- # Make sure that next paragraph is not modfied before printing
- $self->_output( $chunk );
-
- }
-
- } elsif ($command eq 'end') {
-
- # Reset suppression
- $self->{_suppress_all_para} = 0;
- $self->{_dont_modify_any_para} = 0;
-
- } elsif ($command eq 'pod') {
-
- # Do nothing
-
- } else {
- carp "Command $command not recognised at line $line_num\n";
- }
-
- }
-
- =item B<verbatim>
-
- Verbatim text
-
- =cut
-
- sub verbatim {
- my $self = shift;
- my ($paragraph, $line_num, $parobj) = @_;
-
- # Expand paragraph unless in =begin block
- if ($self->{_dont_modify_any_para}) {
- # Just print as is
- $self->_output($paragraph);
-
- } else {
-
- return if $paragraph =~ /^\s+$/;
-
- # Clean trailing space
- $paragraph =~ s/\s+$//;
-
- # Clean tabs. Routine taken from Tabs.pm
- # by David Muir Sharnoff muir@idiom.com,
- # slightly modified by hsmyers@sdragons.com 10/22/01
- my @l = split("\n",$paragraph);
- foreach (@l) {
- 1 while s/(^|\n)([^\t\n]*)(\t+)/
- $1. $2 . (" " x
- (8 * length($3)
- - (length($2) % 8)))
- /sex;
- }
- $paragraph = join("\n",@l);
- # End of change.
-
-
-
- $self->_output('\begin{verbatim}' . "\n$paragraph\n". '\end{verbatim}'."\n");
- }
- }
-
- =item B<textblock>
-
- Plain text paragraph.
-
- =cut
-
- sub textblock {
- my $self = shift;
- my ($paragraph, $line_num, $parobj) = @_;
-
- # print Dumper($self);
-
- # Expand paragraph unless in =begin block
- if ($self->{_dont_modify_any_para}) {
- # Just print as is
- $self->_output($paragraph);
-
- return;
- }
-
-
- # Escape latex special characters
- $paragraph = $self->_replace_special_chars($paragraph);
-
- # Interpolate interior sequences
- my $expansion = $self->interpolate($paragraph, $line_num);
- $expansion =~ s/\s+$//;
-
- # Escape special characters that can not be done earlier
- $expansion = $self->_replace_special_chars_late($expansion);
-
- # If we are replacing 'head1 NAME' with a section
- # we need to look in the paragraph and rewrite things
- # Need to make sure this is called only on the first paragraph
- # following 'head1 NAME' and not on subsequent paragraphs that may be
- # present.
- if ($self->{_CURRENT_HEAD1} =~ /^NAME/i && $self->ReplaceNAMEwithSection()) {
-
- # Strip white space from start and end
- $paragraph =~ s/^\s+//;
- $paragraph =~ s/\s$//;
-
- # Split the string into 2 parts
- my ($name, $purpose) = split(/\s+-\s+/, $expansion,2);
-
- # Now prevent this from triggering until a new head1 NAME is set
- $self->{_CURRENT_HEAD1} = '_NAME';
-
- # Might want to clear the Label() before doing this (CHECK)
-
- # Print the heading
- $self->head(1, $name, $parobj);
-
- # Set the labeling in case we want unique names later
- $self->Label( $self->_create_label( $name, 1 ) );
-
- # Raise the Head1Level by one so that subsequent =head1 appear
- # as subsections of the main name section unless we are already
- # at maximum [Head1Level() could check this itself - CHECK]
- $self->Head1Level( $self->Head1Level() + 1)
- unless $self->Head1Level == $#LatexSections;
-
- # Now write out the new latex paragraph
- $purpose = ucfirst($purpose);
- $self->_output("\n\n$purpose\n\n");
-
- } else {
- # Just write the output
- $self->_output("\n\n$expansion\n\n");
- }
-
- }
-
- =item B<interior_sequence>
-
- Interior sequence expansion
-
- =cut
-
- sub interior_sequence {
- my $self = shift;
-
- my ($seq_command, $seq_argument, $pod_seq) = @_;
-
- if ($seq_command eq 'B') {
- return "\\textbf{$seq_argument}";
-
- } elsif ($seq_command eq 'I') {
- return "\\textit{$seq_argument}";
-
- } elsif ($seq_command eq 'E') {
-
- # If it is simply a number
- if ($seq_argument =~ /^\d+$/) {
- return chr($seq_argument);
- # Look up escape in hash table
- } elsif (exists $HTML_Escapes{$seq_argument}) {
- return $HTML_Escapes{$seq_argument};
-
- } else {
- my ($file, $line) = $pod_seq->file_line();
- warn "Escape sequence $seq_argument not recognised at line $line of file $file\n";
- return;
- }
-
- } elsif ($seq_command eq 'Z') {
-
- # Zero width space
- return '$\!$'; # '
-
- } elsif ($seq_command eq 'C') {
- return "\\texttt{$seq_argument}";
-
- } elsif ($seq_command eq 'F') {
- return "\\emph{$seq_argument}";
-
- } elsif ($seq_command eq 'S') {
- # non breakable spaces
- my $nbsp = '$\:$'; #'
-
- $seq_argument =~ s/\s/$nbsp/g;
- return $seq_argument;
-
- } elsif ($seq_command eq 'L') {
-
- my $link = new Pod::Hyperlink($seq_argument);
-
- # undef on failure
- unless (defined $link) {
- carp $@;
- return;
- }
-
- # Handle internal links differently
- my $type = $link->type;
- my $page = $link->page;
-
- if ($type eq 'section' && $page eq '') {
- # Use internal latex reference
- my $node = $link->node;
-
- # Convert to a label
- $node = $self->_create_label($node);
-
- return "\\S\\ref{$node}";
-
- } else {
- # Use default markup for external references
- # (although Starlink would use \xlabel)
- my $markup = $link->markup;
-
- my ($file, $line) = $pod_seq->file_line();
-
- return $self->interpolate($link->markup, $line);
- }
-
-
-
- } elsif ($seq_command eq 'P') {
- # Special markup for Pod::Hyperlink
- # Replace :: with / - but not sure if I want to do this
- # any more.
- my $link = $seq_argument;
- $link =~ s/::/\//g;
-
- my $ref = "\\emph{$seq_argument}";
- return $ref;
-
- } elsif ($seq_command eq 'Q') {
- # Special markup for Pod::Hyperlink
- return "\\textsf{$seq_argument}";
-
- } elsif ($seq_command eq 'X') {
- # Index entries
-
- # use \index command
- # I will let '!' go through for now
- # not sure how sub categories are handled in X<>
- my $index = $self->_create_index($seq_argument);
- return "\\index{$index}\n";
-
- } else {
- carp "Unknown sequence $seq_command<$seq_argument>";
- }
-
- }
-
- =back
-
- =head2 List Methods
-
- Methods used to handle lists.
-
- =over 4
-
- =item B<begin_list>
-
- Called when a new list is found (via the C<over> directive).
- Creates a new C<Pod::List> object and stores it on the
- list stack.
-
- $parser->begin_list($indent, $line_num);
-
- =cut
-
- sub begin_list {
- my $self = shift;
- my $indent = shift;
- my $line_num = shift;
-
- # Indicate that a list should be started for the next item
- # need to do this to work out the type of list
- push ( @{$self->lists}, new Pod::List(-indent => $indent,
- -start => $line_num,
- -file => $self->input_file,
- )
- );
-
- }
-
- =item B<end_list>
-
- Called when the end of a list is found (the C<back> directive).
- Pops the C<Pod::List> object off the stack of lists and writes
- the C<latex> code required to close a list.
-
- $parser->end_list($line_num);
-
- =cut
-
- sub end_list {
- my $self = shift;
- my $line_num = shift;
-
- unless (defined $self->lists->[-1]) {
- my $file = $self->input_file;
- warn "No list is active at line $line_num (file=$file). Missing =over?\n";
- return;
- }
-
- # What to write depends on list type
- my $type = $self->lists->[-1]->type;
-
- # Dont write anything if the list type is not set
- # iomplying that a list was created but no entries were
- # placed in it (eg because of a =begin/=end combination)
- $self->_output("\\end{$type}\n")
- if (defined $type && length($type) > 0);
-
- # Clear list
- pop(@{ $self->lists});
-
- }
-
- =item B<add_item>
-
- Add items to the list. The first time an item is encountered
- (determined from the state of the current C<Pod::List> object)
- the type of list is determined (ordered, unnumbered or description)
- and the relevant latex code issued.
-
- $parser->add_item($paragraph, $line_num);
-
- =cut
-
- sub add_item {
- my $self = shift;
- my $paragraph = shift;
- my $line_num = shift;
-
- unless (defined $self->lists->[-1]) {
- my $file = $self->input_file;
- warn "List has already ended by line $line_num of file $file. Missing =over?\n";
- # Replace special chars
- # $paragraph = $self->_replace_special_chars($paragraph);
- $self->_output("$paragraph\n\n");
- return;
- }
-
- # If paragraphs printing is turned off via =begin/=end or whatver
- # simply return immediately
- return if $self->{_suppress_all_para};
-
- # Check to see whether we are starting a new lists
- if (scalar($self->lists->[-1]->item) == 0) {
-
- # Examine the paragraph to determine what type of list
- # we have
- $paragraph =~ s/\s+$//;
- $paragraph =~ s/^\s+//;
-
- my $type;
- if (substr($paragraph, 0,1) eq '*') {
- $type = 'itemize';
- } elsif ($paragraph =~ /^\d/) {
- $type = 'enumerate';
- } else {
- $type = 'description';
- }
- $self->lists->[-1]->type($type);
-
- $self->_output("\\begin{$type}\n");
-
- }
-
- my $type = $self->lists->[-1]->type;
-
- if ($type eq 'description') {
- # Handle long items - long items do not wrap
- # If the string is longer than 40 characters we split
- # it into a real item header and some bold text.
- my $maxlen = 40;
- my ($hunk1, $hunk2) = $self->_split_delimited( $paragraph, $maxlen );
-
- # Print the first hunk
- $self->_output("\n\\item[$hunk1] ");
-
- # and the second hunk if it is defined
- if ($hunk2) {
- $self->_output("\\textbf{$hunk2}");
- } else {
- # Not there so make sure we have a new line
- $self->_output("\\mbox{}");
- }
-
- } else {
- # If the item was '* Something' we still need to write
- # out the something
- my $extra_info = $paragraph;
- $extra_info =~ s/^\*\s*//;
- $self->_output("\n\\item $extra_info");
- }
-
- # Store the item name in the object. Required so that
- # we can tell if the list is new or not
- $self->lists->[-1]->item($paragraph);
-
- }
-
- =back
-
- =head2 Methods for headings
-
- =over 4
-
- =item B<head>
-
- Print a heading of the required level.
-
- $parser->head($level, $paragraph, $parobj);
-
- The first argument is the pod heading level. The second argument
- is the contents of the heading. The 3rd argument is a Pod::Paragraph
- object so that the line number can be extracted.
-
- =cut
-
- sub head {
- my $self = shift;
- my $num = shift;
- my $paragraph = shift;
- my $parobj = shift;
-
- # If we are replace 'head1 NAME' with a section
- # we return immediately if we get it
- return
- if ($self->{_CURRENT_HEAD1} =~ /^NAME/i && $self->ReplaceNAMEwithSection());
-
- # Create a label
- my $label = $self->_create_label($paragraph);
-
- # Create an index entry
- my $index = $self->_create_index($paragraph);
-
- # Work out position in the above array taking into account
- # that =head1 is equivalent to $self->Head1Level
-
- my $level = $self->Head1Level() - 1 + $num;
-
- # Warn if heading to large
- if ($num > $#LatexSections) {
- my $line = $parobj->file_line;
- my $file = $self->input_file;
- warn "Heading level too large ($level) for LaTeX at line $line of file $file\n";
- $level = $#LatexSections;
- }
-
- # Check to see whether section should be unnumbered
- my $star = ($level >= $self->LevelNoNum ? '*' : '');
-
- # Section
- $self->_output("\\" .$LatexSections[$level] .$star ."{$paragraph\\label{".$label ."}\\index{".$index."}}\n");
-
- }
-
-
- =back
-
- =end __PRIVATE__
-
- =begin __PRIVATE__
-
- =head2 Internal methods
-
- Internal routines are described in this section. They do not form part of the
- public interface. All private methods start with an underscore.
-
- =over 4
-
- =item B<_output>
-
- Output text to the output filehandle. This method must be always be called
- to output parsed text.
-
- $parser->_output($text);
-
- Does not write anything if a =begin is active that should be
- ignored.
-
- =cut
-
- sub _output {
- my $self = shift;
- my $text = shift;
-
- print { $self->output_handle } $text
- unless $self->{_suppress_all_para};
-
- }
-
-
- =item B<_replace_special_chars>
-
- Subroutine to replace characters that are special in C<latex>
- with the escaped forms
-
- $escaped = $parser->_replace_special_chars($paragraph);
-
- Need to call this routine before interior_sequences are munged but not
- if verbatim. It must be called before interpolation of interior
- sequences so that curly brackets and special latex characters inserted
- during interpolation are not themselves escaped. This means that < and
- > can not be modified here since the text still contains interior
- sequences.
-
- Special characters and the C<latex> equivalents are:
-
- } \}
- { \{
- _ \_
- $ \$
- % \%
- & \&
- \ $\backslash$
- ^ \^{}
- ~ \~{}
-
- =cut
-
- sub _replace_special_chars {
- my $self = shift;
- my $paragraph = shift;
-
- # Replace a \ with $\backslash$
- # This is made more complicated because the dollars will be escaped
- # by the subsequent replacement. Easiest to add \backslash
- # now and then add the dollars
- $paragraph =~ s/\\/\\backslash/g;
-
- # Must be done after escape of \ since this command adds latex escapes
- # Replace characters that can be escaped
- $paragraph =~ s/([\$\#&%_{}])/\\$1/g;
-
- # Replace ^ characters with \^{} so that $^F works okay
- $paragraph =~ s/(\^)/\\$1\{\}/g;
-
- # Replace tilde (~) with \texttt{\~{}}
- $paragraph =~ s/~/\\texttt\{\\~\{\}\}/g;
-
- # Now add the dollars around each \backslash
- $paragraph =~ s/(\\backslash)/\$$1\$/g;
- return $paragraph;
- }
-
- =item B<_replace_special_chars_late>
-
- Replace special characters that can not be replaced before interior
- sequence interpolation. See C<_replace_special_chars> for a routine
- to replace special characters prior to interpolation of interior
- sequences.
-
- Does the following transformation:
-
- < $<$
- > $>$
- | $|$
-
-
- =cut
-
- sub _replace_special_chars_late {
- my $self = shift;
- my $paragraph = shift;
-
- # < and >
- $paragraph =~ s/(<|>)/\$$1\$/g;
-
- # Replace | with $|$
- $paragraph =~ s'\|'$|$'g;
-
-
- return $paragraph;
- }
-
-
- =item B<_create_label>
-
- Return a string that can be used as an internal reference
- in a C<latex> document (i.e. accepted by the C<\label> command)
-
- $label = $parser->_create_label($string)
-
- If UniqueLabels is true returns a label prefixed by Label()
- This can be suppressed with an optional second argument.
-
- $label = $parser->_create_label($string, $suppress);
-
- If a second argument is supplied (of any value including undef)
- the Label() is never prefixed. This means that this routine can
- be called to create a Label() without prefixing a previous setting.
-
- =cut
-
- sub _create_label {
- my $self = shift;
- my $paragraph = shift;
- my $suppress = (@_ ? 1 : 0 );
-
- # Remove latex commands
- $paragraph = $self->_clean_latex_commands($paragraph);
-
- # Remove non alphanumerics from the label and replace with underscores
- # want to protect '-' though so use negated character classes
- $paragraph =~ s/[^-:\w]/_/g;
-
- # Multiple underscores will look unsightly so remove repeats
- # This will also have the advantage of tidying up the end and
- # start of string
- $paragraph =~ s/_+/_/g;
-
- # If required need to make sure that the label is unique
- # since it is possible to have multiple pods in a single
- # document
- if (!$suppress && $self->UniqueLabels() && defined $self->Label) {
- $paragraph = $self->Label() .'_'. $paragraph;
- }
-
- return $paragraph;
- }
-
-
- =item B<_create_index>
-
- Similar to C<_create_label> except an index entry is created.
- If C<UniqueLabels> is true, the index entry is prefixed by
- the current C<Label> and an exclamation mark.
-
- $ind = $parser->_create_index($paragraph);
-
- An exclamation mark is used by C<makeindex> to generate
- sub-entries in an index.
-
- =cut
-
- sub _create_index {
- my $self = shift;
- my $paragraph = shift;
- my $suppress = (@_ ? 1 : 0 );
-
- # Remove latex commands
- $paragraph = $self->_clean_latex_commands($paragraph);
-
- # If required need to make sure that the index entry is unique
- # since it is possible to have multiple pods in a single
- # document
- if (!$suppress && $self->UniqueLabels() && defined $self->Label) {
- $paragraph = $self->Label() .'!'. $paragraph;
- }
-
- # Need to replace _ with space
- $paragraph =~ s/_/ /g;
-
- return $paragraph;
-
- }
-
- =item B<_clean_latex_commands>
-
- Removes latex commands from text. The latex command is assumed to be of the
- form C<\command{ text }>. "C<text>" is retained
-
- $clean = $parser->_clean_latex_commands($text);
-
- =cut
-
- sub _clean_latex_commands {
- my $self = shift;
- my $paragraph = shift;
-
- # Remove latex commands of the form \text{ }
- # and replace with the contents of the { }
- # need to make this non-greedy so that it can handle
- # "\text{a} and \text2{b}"
- # without converting it to
- # "a} and \text2{b"
- # This match will still get into trouble if \} is present
- # This is not vital since the subsequent replacement of non-alphanumeric
- # characters will tidy it up anyway
- $paragraph =~ s/\\\w+{(.*?)}/$1/g;
-
- return $paragraph
- }
-
- =item B<_split_delimited>
-
- Split the supplied string into two parts at approximately the
- specified word boundary. Special care is made to make sure that it
- does not split in the middle of some curly brackets.
-
- e.g. "this text is \textbf{very bold}" would not be split into
- "this text is \textbf{very" and " bold".
-
- ($hunk1, $hunk2) = $self->_split_delimited( $para, $length);
-
- The length indicates the maximum length of hunk1.
-
- =cut
-
- # initially Supplied by hsmyers@sdragons.com
- # 10/25/01, utility to split \hbox
- # busting lines. Reformatted by TimJ to match module style.
- sub _split_delimited {
- my $self = shift;
- my $input = shift;
- my $limit = shift;
-
- # Return immediately if already small
- return ($input, '') if length($input) < $limit;
-
- my @output;
- my $s = '';
- my $t = '';
- my $depth = 0;
- my $token;
-
- $input =~ s/\n/ /gm;
- $input .= ' ';
- foreach ( split ( //, $input ) ) {
- $token .= $_;
- if (/\{/) {
- $depth++;
- } elsif ( /}/ ) {
- $depth--;
- } elsif ( / / and $depth == 0) {
- push @output, $token if ( $token and $token ne ' ' );
- $token = '';
- }
- }
-
- foreach (@output) {
- if (length($s) < $limit) {
- $s .= $_;
- } else {
- $t .= $_;
- }
- }
-
- # Tidy up
- $s =~ s/\s+$//;
- $t =~ s/\s+$//;
- return ($s,$t);
- }
-
- =back
-
- =end __PRIVATE__
-
- =head1 NOTES
-
- Compatible with C<latex2e> only. Can not be used with C<latex> v2.09
- or earlier.
-
- A subclass of C<Pod::Select> so that specific pod sections can be
- converted to C<latex> by using the C<select> method.
-
- Some HTML escapes are missing and many have not been tested.
-
- =head1 SEE ALSO
-
- L<Pod::Parser>, L<Pod::Select>, L<pod2latex>
-
- =head1 AUTHORS
-
- Tim Jenness E<lt>t.jenness@jach.hawaii.eduE<gt>
-
- Bug fixes have been received from: Simon Cozens
- E<lt>simon@cozens.netE<gt>, Mark A. Hershberger
- E<lt>mah@everybody.orgE<gt>, Marcel Grunauer
- E<lt>marcel@codewerk.comE<gt> and Hugh S Myers
- E<lt>hsmyers@sdragons.comE<gt>.
-
- =head1 COPYRIGHT
-
- Copyright (C) 2000-2001 Tim Jenness. All Rights Reserved.
-
- This program is free software; you can redistribute it and/or modify
- it under the same terms as Perl itself.
-
- =begin __PRIVATE__
-
- =head1 REVISION
-
- $Id: LaTeX.pm,v 1.12 2001/11/20 20:59:26 timj Exp $
-
- =end __PRIVATE__
-
- =cut
-