package Pod::Checker;
use vars qw($VERSION);
-$VERSION = 1.090; ## Current version of this package
+$VERSION = 1.096; ## Current version of this package
require 5.004; ## requires this Perl version or later
+use Pod::ParseUtils; ## for hyperlinks and lists
+
=head1 NAME
Pod::Checker, podchecker() - check pod documents for syntax errors
$syntax_okay = podchecker($filepath, $outputpath, %options);
+ my $checker = new Pod::Checker %options;
+
=head1 OPTIONS/ARGUMENTS
C<$filepath> is the input POD to read and C<$outputpath> is
where to write POD syntax error messages. Either argument may be a scalar
-indcating a file-path, or else a reference to an open filehandle.
+indicating a file-path, or else a reference to an open filehandle.
If unspecified, the input-file it defaults to C<\*STDIN>, and
the output-file defaults to C<\*STDERR>.
-=head2 Options
+=head2 podchecker()
+
+This function can take a hash of options:
=over 4
B<podchecker> will perform syntax checking of Perl5 POD format documentation.
-I<NOTE THAT THIS MODULE IS CURRENTLY IN THE INITIAL DEVELOPMENT STAGE!>
-As of this writing, all it does is check for unknown '=xxxx' commands,
-unknown 'X<...>' interior-sequences, and unterminated interior sequences.
+I<NOTE THAT THIS MODULE IS CURRENTLY IN THE BETA STAGE!>
It is hoped that curious/ambitious user will help flesh out and add the
-additional features they wish to see in B<Pod::Checker> and B<podchecker>.
+additional features they wish to see in B<Pod::Checker> and B<podchecker>
+and verify that the checks are consistent with L<perlpod>.
-The following additional checks are preformed:
+The following checks are preformed:
=over 4
=item *
-Check for proper balancing of C<=begin> and C<=end>.
+Unknown '=xxxx' commands, unknown 'X<...>' interior-sequences,
+and unterminated interior sequences.
+
+=item *
+
+Check for proper balancing of C<=begin> and C<=end>. The contents of such
+a block are generally ignored, i.e. no syntax checks are performed.
=item *
=item *
-Check for same nested interior-sequences (e.g. C<LE<lt>...LE<lt>...E<gt>...E<gt>>).
+Check for same nested interior-sequences (e.g.
+C<LE<lt>...LE<lt>...E<gt>...E<gt>>).
=item *
-Check for malformed entities.
+Check for malformed or nonexisting entities C<EE<lt>...E<gt>>.
=item *
-Check for correct syntax of hyperlinks C<LE<lt>E<gt>>. See L<perlpod> for
-details.
+Check for correct syntax of hyperlinks C<LE<lt>...E<gt>>. See L<perlpod>
+for details.
=item *
-Check for unresolved document-internal links.
+Check for unresolved document-internal links. This check may also reveal
+misspelled links that seem to be internal links but should be links
+to something else.
=back
-=head2 Warnings
+=head2 Additional Features
+
+While checking, this module collects document properties, e.g. the nodes
+for hyperlinks (C<=headX>, C<=item>). POD translators can use this feature
+to syntax-check and get the nodes in a first pass before actually starting
+to convert. This is expensive in terms of execution time, but allows for
+very robust conversions.
+
+=head1 DIAGNOSTICS
-The following warnings are printed. These may not necessarily cause trouble,
-but indicate mediocre style.
+=head2 Errors
=over 4
-=item *
+=item * =over on line I<N> without closing =back
-Spurious characters after C<=back> and C<=end>.
+The C<=over> command does not have a corresponding C<=back> before the
+next heading (C<=head1> or C<=head2>) or the end of the file.
-=item *
+=item * =item without previous =over
-Unescaped C<E<lt>> and C<E<gt>> in the text.
+=item * =back without previous =over
-=item *
+An C<=item> or C<=back> command has been found outside a
+C<=over>/C<=back> block.
-Missing arguments for C<=begin> and C<=over>.
+=item * No argument for =begin
-=item *
+A C<=begin> command was found that is not followed by the formatter
+specification.
-Empty C<=over> / C<=back> list.
+=item * =end without =begin
-=item *
+A standalone C<=end> command was found.
+
+=item * Nested =begin's
+
+There were at least two concecutive C<=begin> commands without
+the corresponding C<=end>. Only one C<=begin> may be active at
+a time.
+
+=item * =for without formatter specification
-Hyperlinks: leading/trailing whitespace, brackets C<()> in the page name.
+There is no specification of the formatter after the C<=for> command.
+
+=item * unresolved internal link I<NAME>
+
+The given link to I<NAME> does not have a matching node in the current
+POD. This also happend when a single word node name is not enclosed in
+C<"">.
+
+=item * Unknown command "I<CMD>"
+
+An invalid POD command has been found. Valid are C<=head1>, C<=head2>,
+C<=over>, C<=item>, C<=back>, C<=begin>, C<=end>, C<=for>, C<=pod>,
+C<=cut>
+
+=item * Unknown interior-sequence "I<SEQ>"
+
+An invalid markup command has been encountered. Valid are:
+C<BE<lt>E<gt>>, C<CE<lt>E<gt>>, C<EE<lt>E<gt>>, C<FE<lt>E<gt>>,
+C<IE<lt>E<gt>>, C<LE<lt>E<gt>>, C<SE<lt>E<gt>>, C<XE<lt>E<gt>>,
+C<ZE<lt>E<gt>>
+
+=item * nested commands I<CMD>E<lt>...I<CMD>E<lt>...E<gt>...E<gt>
+
+Two nested identical markup commands have been found. Generally this
+does not make sense.
+
+=item * garbled entity I<STRING>
+
+The I<STRING> found cannot be interpreted as an character entity.
+
+=item * malformed link LE<lt>E<gt>
+
+The link found cannot be parsed because it does not conform to the
+syntax described in L<perlpod>.
=back
-=head1 DIAGNOSTICS
+=head2 Warnings
-I<[T.B.D.]>
+These may not necessarily cause trouble, but indicate mediocre style.
+
+=over 4
+
+=item * No numeric argument for =over
+
+The C<=over> command is supposed to have a numeric argument (the
+indentation).
+
+=item * Spurious character(s) after =back
+
+The C<=back> command does not take any arguments.
+
+=item * I<N> unescaped C<E<lt>E<gt>> in paragraph
+
+Angle brackets not written as C<E<lt>ltE<gt>> and C<E<lt>gtE<gt>>
+can potentially cause errors as they could be misinterpreted as
+markup commands.
+
+=item * Non-standard entity
+
+A character entity was found that does not belong to the standard
+ISO set.
+
+=item * No items in =over
+
+The list does not contain any items.
+
+=item * No argument for =item
+
+C<=item> without any parameters is deprecated. It should either be followed
+by C<*> to indicate an unordered list, by a number (optionally followed
+by a dot) to indicate an ordered (numbered) list or simple text for a
+definition list.
+
+=item * Verbatim paragraph in NAME section
+
+The NAME section (C<=head1 NAME>) should consist of a single paragraph
+with the script/module name, followed by a dash `-' and a very short
+description of what the thing is good for.
+
+=item * Hyperlinks
+
+There are some warnings wrt. hyperlinks:
+Leading/trailing whitespace, newlines in hyperlinks,
+brackets C<()>.
+
+=back
=head1 RETURN VALUE
'E' => 1,
);
+# stolen from HTML::Entities
+my %ENTITIES = (
+ # Some normal chars that have special meaning in SGML context
+ amp => '&', # ampersand
+'gt' => '>', # greater than
+'lt' => '<', # less than
+ quot => '"', # double quote
+
+ # PUBLIC ISO 8879-1986//ENTITIES Added Latin 1//EN//HTML
+ AElig => 'Æ', # capital AE diphthong (ligature)
+ Aacute => 'Á', # capital A, acute accent
+ Acirc => 'Â', # capital A, circumflex accent
+ Agrave => 'À', # capital A, grave accent
+ Aring => 'Å', # capital A, ring
+ Atilde => 'Ã', # capital A, tilde
+ Auml => 'Ä', # capital A, dieresis or umlaut mark
+ Ccedil => 'Ç', # capital C, cedilla
+ ETH => 'Ð', # capital Eth, Icelandic
+ Eacute => 'É', # capital E, acute accent
+ Ecirc => 'Ê', # capital E, circumflex accent
+ Egrave => 'È', # capital E, grave accent
+ Euml => 'Ë', # capital E, dieresis or umlaut mark
+ Iacute => 'Í', # capital I, acute accent
+ Icirc => 'Î', # capital I, circumflex accent
+ Igrave => 'Ì', # capital I, grave accent
+ Iuml => 'Ï', # capital I, dieresis or umlaut mark
+ Ntilde => 'Ñ', # capital N, tilde
+ Oacute => 'Ó', # capital O, acute accent
+ Ocirc => 'Ô', # capital O, circumflex accent
+ Ograve => 'Ò', # capital O, grave accent
+ Oslash => 'Ø', # capital O, slash
+ Otilde => 'Õ', # capital O, tilde
+ Ouml => 'Ö', # capital O, dieresis or umlaut mark
+ THORN => 'Þ', # capital THORN, Icelandic
+ Uacute => 'Ú', # capital U, acute accent
+ Ucirc => 'Û', # capital U, circumflex accent
+ Ugrave => 'Ù', # capital U, grave accent
+ Uuml => 'Ü', # capital U, dieresis or umlaut mark
+ Yacute => 'Ý', # capital Y, acute accent
+ aacute => 'á', # small a, acute accent
+ acirc => 'â', # small a, circumflex accent
+ aelig => 'æ', # small ae diphthong (ligature)
+ agrave => 'à', # small a, grave accent
+ aring => 'å', # small a, ring
+ atilde => 'ã', # small a, tilde
+ auml => 'ä', # small a, dieresis or umlaut mark
+ ccedil => 'ç', # small c, cedilla
+ eacute => 'é', # small e, acute accent
+ ecirc => 'ê', # small e, circumflex accent
+ egrave => 'è', # small e, grave accent
+ eth => 'ð', # small eth, Icelandic
+ euml => 'ë', # small e, dieresis or umlaut mark
+ iacute => 'í', # small i, acute accent
+ icirc => 'î', # small i, circumflex accent
+ igrave => 'ì', # small i, grave accent
+ iuml => 'ï', # small i, dieresis or umlaut mark
+ ntilde => 'ñ', # small n, tilde
+ oacute => 'ó', # small o, acute accent
+ ocirc => 'ô', # small o, circumflex accent
+ ograve => 'ò', # small o, grave accent
+ oslash => 'ø', # small o, slash
+ otilde => 'õ', # small o, tilde
+ ouml => 'ö', # small o, dieresis or umlaut mark
+ szlig => 'ß', # small sharp s, German (sz ligature)
+ thorn => 'þ', # small thorn, Icelandic
+ uacute => 'ú', # small u, acute accent
+ ucirc => 'û', # small u, circumflex accent
+ ugrave => 'ù', # small u, grave accent
+ uuml => 'ü', # small u, dieresis or umlaut mark
+ yacute => 'ý', # small y, acute accent
+ yuml => 'ÿ', # small y, dieresis or umlaut mark
+
+ # Some extra Latin 1 chars that are listed in the HTML3.2 draft (21-May-96)
+ copy => '©', # copyright sign
+ reg => '®', # registered sign
+ nbsp => "\240", # non breaking space
+
+ # Additional ISO-8859/1 entities listed in rfc1866 (section 14)
+ iexcl => '¡',
+ cent => '¢',
+ pound => '£',
+ curren => '¤',
+ yen => '¥',
+ brvbar => '¦',
+ sect => '§',
+ uml => '¨',
+ ordf => 'ª',
+ laquo => '«',
+'not' => '¬', # not is a keyword in perl
+ shy => '',
+ macr => '¯',
+ deg => '°',
+ plusmn => '±',
+ sup1 => '¹',
+ sup2 => '²',
+ sup3 => '³',
+ acute => '´',
+ micro => 'µ',
+ para => '¶',
+ middot => '·',
+ cedil => '¸',
+ ordm => 'º',
+ raquo => '»',
+ frac14 => '¼',
+ frac12 => '½',
+ frac34 => '¾',
+ iquest => '¿',
+'times' => '×', # times is a keyword in perl
+ divide => '÷',
+);
+
##---------------------------------------------------------------------------
##---------------------------------
## Initialize number of errors, and setup an error function to
## increment this number and then print to the designated output.
$self->{_NUM_ERRORS} = 0;
- $self->errorsub('poderror');
+ $self->errorsub('poderror'); # set the error handling subroutine
$self->{_commands} = 0; # total number of POD commands encountered
$self->{_list_stack} = []; # stack for nested lists
$self->{_have_begin} = ''; # stores =begin
$self->{_links} = []; # stack for internal hyperlinks
$self->{_nodes} = []; # stack for =head/=item nodes
+ # print warnings?
$self->{-warnings} = 1 unless(defined $self->{-warnings});
+ $self->{_current_head1} = ''; # the current =head1 block
}
-## Invoked as $self->poderror( @args ), or $self->poderror( {%opts}, @args )
+# Invoked as $self->poderror( @args ), or $self->poderror( {%opts}, @args )
sub poderror {
my $self = shift;
my %opts = (ref $_[0]) ? %{shift()} : ();
++($self->{_NUM_ERRORS})
if(!%opts || ($opts{-severity} && $opts{-severity} eq 'ERROR'));
my $out_fh = $self->output_handle();
- print $out_fh ($severity, $msg, $line, $file, "\n");
+ print $out_fh ($severity, $msg, $line, $file, "\n")
+ if($self->{-warnings} || !%opts || $opts{-severity} ne 'WARNING');
}
+# set/retrieve the number of errors found
sub num_errors {
return (@_ > 1) ? ($_[0]->{_NUM_ERRORS} = $_[1]) : $_[0]->{_NUM_ERRORS};
}
+# set and/or retrieve canonical name of POD
+sub name {
+ return (@_ > 1 && $_[1]) ?
+ ($_[0]->{-name} = $_[1]) : $_[0]->{-name};
+}
+
+# set/return nodes of the current POD
+sub node {
+ my ($self,$text) = @_;
+ if(defined $text) {
+ $text =~ s/[\s\n]+$//; # strip trailing whitespace
+ # add node
+ push(@{$self->{_nodes}}, $text);
+ return $text;
+ }
+ @{$self->{_nodes}};
+}
+
+# set/return hyperlinks of the current POD
+sub hyperlink {
+ my $self = shift;
+ if($_[0]) {
+ push(@{$self->{_links}}, $_[0]);
+ return $_[0];
+ }
+ @{$self->{_links}};
+}
+
## overrides for Pod::Parser
sub end_pod {
# first build the node names from the paragraph text
my %nodes;
foreach($self->node()) {
- #print "Have node: +$_+\n";
$nodes{$_} = 1;
if(/^(\S+)\s+/) {
# we have more than one word. Use the first as a node, too.
}
}
foreach($self->hyperlink()) {
- #print "Seek node: +$_+\n";
my $line = '';
s/^(\d+):// && ($line = $1);
if($_ && !$nodes{$_}) {
}
}
+# check a POD command directive
sub command {
my ($self, $cmd, $paragraph, $line_num, $pod_para) = @_;
my ($file, $line) = $pod_para->file_line;
$self->{_commands}++; # found a valid command
## check syntax of particular command
if($cmd eq 'over') {
+ # check for argument
+ $arg = $self->interpolate_and_check($paragraph, $line,$file);
+ my $indent = 4; # default
+ if($arg && $arg =~ /^\s*(\d+)\s*$/) {
+ $indent = $1;
+ } else {
+ $self->poderror({ -line => $line, -file => $file,
+ -severity => 'WARNING',
+ -msg => "No numeric argument for =over"});
+ }
# start a new list
- unshift(@{$self->{_list_stack}},
- Pod::List->new(
- -indent => $paragraph,
+ unshift(@{$self->{_list_stack}}, Pod::List->new(
+ -indent => $indent,
-start => $line,
-file => $file));
}
elsif($cmd eq 'item') {
+ # are we in a list?
unless(@{$self->{_list_stack}}) {
$self->poderror({ -line => $line, -file => $file,
-severity => 'ERROR',
-msg => "=item without previous =over" });
+ # auto-open in case we encounter many more
+ unshift(@{$self->{_list_stack}},
+ Pod::List->new(
+ -indent => 'auto',
+ -start => $line,
+ -file => $file));
}
- else {
- # check for argument
- $arg = $self->_interpolate_and_check($paragraph, $line, $file);
- unless($arg && $arg =~ /(\S+)/) {
- $self->poderror({ -line => $line, -file => $file,
- -severity => 'WARNING',
- -msg => "No argument for =item" });
- }
- # add this item
- $self->{_list_stack}[0]->item($arg || '');
- # remember this node
- $self->node($arg) if($arg);
+ # check for argument
+ $arg = $self->interpolate_and_check($paragraph, $line, $file);
+ unless($arg && $arg =~ /(\S+)/) {
+ $self->poderror({ -line => $line, -file => $file,
+ -severity => 'WARNING',
+ -msg => "No argument for =item" });
+ $arg = ' '; # empty
}
+ # add this item
+ $self->{_list_stack}[0]->item($arg);
+ # remember this node
+ $self->node($arg);
}
elsif($cmd eq 'back') {
# check if we have an open list
}
else {
# check for spurious characters
- $arg = $self->_interpolate_and_check($paragraph, $line,$file);
+ $arg = $self->interpolate_and_check($paragraph, $line,$file);
if($arg && $arg =~ /\S/) {
$self->poderror({ -line => $line, -file => $file,
-severity => 'WARNING',
while($list = shift(@{$self->{_list_stack}})) {
$self->poderror({ -line => $line, -file => $file,
-severity => 'ERROR',
- -msg => "unclosed =over (line ". $list->start() .
- ") at $cmd" });
+ -msg => "=over on line ". $list->start() .
+ " without closing =back (at $cmd)" });
}
}
# remember this node
- $arg = $self->_interpolate_and_check($paragraph, $line,$file);
+ $arg = $self->interpolate_and_check($paragraph, $line,$file);
$self->node($arg) if($arg);
+ if($cmd eq 'head1') {
+ $arg =~ s/[\s\n]+$//;
+ $self->{_current_head1} = $arg;
+ } else {
+ $self->{_current_head1} = '';
+ }
}
elsif($cmd eq 'begin') {
if($self->{_have_begin}) {
}
else {
# check for argument
- $arg = $self->_interpolate_and_check($paragraph, $line,$file);
+ $arg = $self->interpolate_and_check($paragraph, $line,$file);
unless($arg && $arg =~ /(\S+)/) {
$self->poderror({ -line => $line, -file => $file,
- -severity => 'WARNING',
+ -severity => 'ERROR',
-msg => "No argument for =begin"});
}
# remember the =begin
# close the existing =begin
$self->{_have_begin} = '';
# check for spurious characters
- $arg = $self->_interpolate_and_check($paragraph, $line,$file);
- if($arg && $arg =~ /\S/) {
- $self->poderror({ -line => $line, -file => $file,
- -severity => 'WARNING',
- -msg => "Spurious character(s) after =end" });
- }
+ $arg = $self->interpolate_and_check($paragraph, $line,$file);
+ # the closing argument is optional
+ #if($arg && $arg =~ /\S/) {
+ # $self->poderror({ -line => $line, -file => $file,
+ # -severity => 'WARNING',
+ # -msg => "Spurious character(s) after =end" });
+ #}
}
else {
# don't have a matching =begin
$self->poderror({ -line => $line, -file => $file,
- -severity => 'WARNING',
+ -severity => 'ERROR',
-msg => "=end without =begin" });
}
}
- }
+ elsif($cmd eq 'for') {
+ unless($paragraph =~ /\s*(\S+)\s*/) {
+ $self->poderror({ -line => $line, -file => $file,
+ -severity => 'ERROR',
+ -msg => "=for without formatter specification" });
+ }
+ $arg = ''; # do not expand paragraph below
+ }
## Check the interior sequences in the command-text
- $self->_interpolate_and_check($paragraph, $line,$file)
+ $self->interpolate_and_check($paragraph, $line,$file)
unless(defined $arg);
+ }
}
-sub _interpolate_and_check {
+# process a block of some text
+sub interpolate_and_check {
my ($self, $paragraph, $line, $file) = @_;
## Check the interior sequences in the command-text
# and return the text
my $count;
# count the unescaped angle brackets
my $i = $_;
- if($count = $i =~ s/[<>]/$self->expand_unescaped_bracket($&)/ge) {
+ if($count = $i =~ tr/<>/<>/) {
$self->poderror({ -line => $line, -file => $file,
-severity => 'WARNING',
- -msg => "$count unescaped <>" });
+ -msg => "$count unescaped <> in paragraph" })
+ if($self->{-warnings});
}
$text .= $i;
next;
-msg => "garbled entity " . $_->raw_text()});
next;
}
- $text .= $self->expand_entity($$contents[0]);
+ my $ent = $$contents[0];
+ if($ent =~ /^\d+$/) {
+ # numeric entity
+ $text .= chr($ent);
+ }
+ elsif($ENTITIES{$ent}) {
+ # known ISO entity
+ $text .= $ENTITIES{$ent};
+ }
+ else {
+ $self->poderror({ -line => $line, -file => $file,
+ -severity => 'WARNING',
+ -msg => "Non-standard entity " . $_->raw_text()});
+ $text .= "E<$ent>";
+ }
}
elsif($cmd eq 'L') {
# try to parse the hyperlink
unless(defined $link) {
$self->poderror({ -line => $line, -file => $file,
-severity => 'ERROR',
- -msg => "malformed link L<>: $@"});
+ -msg => "malformed link " . $_->raw_text() ." : $@"});
next;
}
$link->line($line); # remember line
$text .= $self->_check_ptree($self->parse_text($link->text(),
$line), $line, $file, "$nestlist$cmd");
my $node = '';
- $node = $self->_check_ptree($self->parse_text($link->node(),
- $line), $line, $file, "$nestlist$cmd")
- if($link->node());
- # store internal link
+ # remember internal link
# _TODO_ what if there is a link to the page itself by the name,
- # e.g. Tk::Pod : L<Tk::Pod/"DESCRIPTION">
- $self->hyperlink("$line:$node") if($node && !$link->page());
+ # e.g. in Tk::Pod : L<Tk::Pod/"DESCRIPTION">
+ if($link->node() && !$link->page() && $link->type() ne 'hyperlink') {
+ $node = $self->_check_ptree($self->parse_text($link->node(),
+ $line), $line, $file, "$nestlist$cmd");
+ $self->hyperlink("$line:$node") if($node);
+ }
}
elsif($cmd =~ /[BCFIS]/) {
# add the guts
$text;
}
-# default method - just return it
-sub expand_unescaped_bracket {
- my ($self,$bracket) = @_;
- $bracket;
-}
-
-# keep the entities
-sub expand_entity {
- my ($self,$entity) = @_;
- "E<$entity>";
-}
-
-# _TODO_ overloadable methods for BC..Z<...> expansion
+# _TODO_ overloadable methods for BC..Z<...> expansion?
+# process a block of verbatim text
sub verbatim {
## Nothing to check
- ## my ($self, $paragraph, $line_num, $pod_para) = @_;
+ my ($self, $paragraph, $line_num, $pod_para) = @_;
+ if($self->{_current_head1} eq 'NAME') {
+ my ($file, $line) = $pod_para->file_line;
+ $self->poderror({ -line => $line, -file => $file,
+ -severity => 'WARNING',
+ -msg => 'Verbatim paragraph in NAME section' });
+ }
}
+# process a block of regular text
sub textblock {
my ($self, $paragraph, $line_num, $pod_para) = @_;
my ($file, $line) = $pod_para->file_line;
- $self->_interpolate_and_check($paragraph, $line,$file);
-}
-
-# set/return nodes of the current POD
-sub node {
- my ($self,$text) = @_;
- if(defined $text) {
- $text =~ s/[\s\n]+$//; # strip trailing whitespace
- # add node
- push(@{$self->{_nodes}}, $text);
- return $text;
- }
- @{$self->{_nodes}};
-}
-
-# set/return hyperlinks of the current POD
-sub hyperlink {
- my $self = shift;
- if($_[0]) {
- push(@{$self->{_links}}, $_[0]);
- return $_[0];
- }
- @{$self->{_links}};
-}
-
-#-----------------------------------------------------------------------------
-# Pod::List
-#
-# class to hold POD list info (=over, =item, =back)
-#-----------------------------------------------------------------------------
-
-package Pod::List;
-
-use Carp;
-
-sub new {
- my $this = shift;
- my $class = ref($this) || $this;
- my %params = @_;
- my $self = {%params};
- bless $self, $class;
- $self->initialize();
- return $self;
-}
-
-sub initialize {
- my $self = shift;
- $self->{-file} ||= 'unknown';
- $self->{-start} ||= 'unknown';
- $self->{-indent} ||= 4; # perlpod: "should be the default"
- $self->{_items} = [];
-}
-
-# The POD file name the list appears in
-sub file {
- return (@_ > 1) ? ($_[0]->{-file} = $_[1]) : $_[0]->{-file};
-}
-
-# The line in the file the node appears
-sub start {
- return (@_ > 1) ? ($_[0]->{-start} = $_[1]) : $_[0]->{-start};
-}
-
-# indent level
-sub indent {
- return (@_ > 1) ? ($_[0]->{-indent} = $_[1]) : $_[0]->{-indent};
-}
-
-# The individual =items of this list
-sub item {
- my ($self,$item) = @_;
- if(defined $item) {
- push(@{$self->{_items}}, $item);
- return $item;
- }
- else {
- return @{$self->{_items}};
- }
-}
-
-#-----------------------------------------------------------------------------
-# Pod::Hyperlink
-#
-# class to hold hyperlinks (L<>)
-#-----------------------------------------------------------------------------
-
-package Pod::Hyperlink;
-
-=head1 NAME
-
-Pod::Hyperlink - class for manipulation of POD hyperlinks
-
-=head1 SYNOPSIS
-
- my $link = Pod::Hyperlink->new('alternative text|page/"section in page"');
-
-=head1 DESCRIPTION
-
-The B<Pod::Hyperlink> class is mainly designed to parse the contents of the
-C<LE<lt>...E<gt>> sequence, providing a simple interface for accessing the
-different parts of a POD hyperlink.
-
-=head1 METHODS
-
-=over 4
-
-=item new()
-
-The B<new()> method can either be passed a set of key/value pairs or a single
-scalar value, namely the contents of a C<LE<lt>...E<gt>> sequence. An object
-of the class C<Pod::Hyperlink> is returned. The value C<undef> indicates a
-failure, the error message is stored in C<$@>.
-
-=item parse()
-
-This method can be used to (re)parse a (new) hyperlink. The result is stored
-in the current object.
-
-=item markup($on,$off,$pageon,$pageoff)
-
-The result of this method is a string the represents the textual value of the
-link, but with included arbitrary markers that highlight the active portion
-of the link. This will mainly be used by POD translators and saves the
-effort of determining which words have to be highlighted. Examples: Depending
-on the type of link, the following text will be returned, the C<*> represent
-the places where the section/item specific on/off markers will be placed
-(link to a specific node) and C<+> for the pageon/pageoff markers (link to the
-top of the page).
-
- the +perl+ manpage
- the *$|* entry in the +perlvar+ manpage
- the section on *OPTIONS* in the +perldoc+ manpage
- the section on *DESCRIPTION* elsewhere in this document
-
-This method is read-only.
-
-=item text()
-
-This method returns the textual representation of the hyperlink as above,
-but without markers (read only).
-
-=item warning()
-
-After parsing, this method returns any warnings ecountered during the
-parsing process.
-
-=item page()
-
-This method sets or returns the POD page this link points to.
-
-=item node()
-
-As above, but the destination node text of the link.
-
-=item type()
-
-The node type, either C<section> or C<item>.
-
-=item alttext()
-
-Sets or returns an alternative text specified in the link.
-=item line(), file()
-
-Just simple slots for storing information about the line and the file
-the link was incountered in. Has to be filled in manually.
-
-=back
-
-=head1 AUTHOR
-
-Marek Rouchal E<lt>marek@saftsack.fs.uni-bayreuth.deE<gt>, borrowing
-a lot of things from L<pod2man> and L<pod2roff>.
-
-=cut
-
-use Carp;
-
-sub new {
- my $this = shift;
- my $class = ref($this) || $this;
- my $self = +{};
- bless $self, $class;
- $self->initialize();
- if(defined $_[0]) {
- if(ref($_[0])) {
- # called with a list of parameters
- %$self = %{$_[0]};
- }
- else {
- # called with L<> contents
- return undef unless($self->parse($_[0]));
- }
- }
- return $self;
-}
-
-sub initialize {
- my $self = shift;
- $self->{-line} ||= 'undef';
- $self->{-file} ||= 'undef';
- $self->{-page} ||= '';
- $self->{-node} ||= '';
- $self->{-alttext} ||= '';
- $self->{-type} ||= 'undef';
- $self->{_warnings} = [];
- $self->_construct_text();
-}
-
-sub parse {
- my $self = shift;
- local($_) = $_[0];
- # syntax check the link and extract destination
- my ($alttext,$page,$section,$item) = ('','','','');
-
- # strip leading/trailing whitespace
- if(s/^[\s\n]+//) {
- $self->warning("ignoring leading whitespace in link");
- }
- if(s/[\s\n]+$//) {
- $self->warning("ignoring trailing whitespace in link");
- }
-
- # collapse newlines with whitespace
- s/\s*\n\s*/ /g;
-
- # extract alternative text
- if(s!^([^|/"\n]*)[|]!!) {
- $alttext = $1;
- }
- # extract page
- if(s!^([^|/"\s]*)(?=/|$)!!) {
- $page = $1;
- }
- # extract section
- if(s!^/?"([^"\n]+)"$!!) { # e.g. L</"blah blah">
- $section = $1;
- }
- # extact item
- if(s!^/(.*)$!!) {
- $item = $1;
- }
- # last chance here
- if(s!^([^|"\s\n/][^"\n/]*)$!!) { # e.g. L<lah di dah>
- $section = $1;
- }
- # now there should be nothing left
- if(length) {
- _invalid_link("garbled entry (spurious characters `$_')");
- return undef;
- }
- elsif(!(length($page) || length($section) || length($item))) {
- _invalid_link("empty link");
- return undef;
- }
- elsif($alttext =~ /[<>]/) {
- _invalid_link("alternative text contains < or >");
- return undef;
- }
- else { # no errors so far
- if($page =~ /[(]\d\w*[)]$/) {
- $self->warning("brackets in `$page'");
- $page = $`; # strip that extension
- }
- if($page =~ /^(\s*)(\S+)(\s*)/ && (length($1) || length($3))) {
- $self->warning("whitespace in `$page'");
- $page = $2; # strip that extension
+ # skip this paragraph if in a =begin block
+ unless($self->{_have_begin}) {
+ my $block = $self->interpolate_and_check($paragraph, $line,$file);
+ if($self->{_current_head1} eq 'NAME') {
+ if($block =~ /^\s*(\S+?)\s*[,-]/) {
+ # this is the canonical name
+ $self->{-name} = $1 unless(defined $self->{-name});
+ }
}
}
- $self->page($page);
- $self->node($section || $item); # _TODO_ do not distinguish for now
- $self->alttext($alttext);
- $self->type($item ? 'item' : 'section');
- 1;
-}
-
-sub _construct_text {
- my $self = shift;
- my $alttext = $self->alttext();
- my $type = $self->type();
- my $section = $self->node();
- my $page = $self->page();
- $self->{_text} =
- $alttext ? $alttext : (
- !$section ? '' :
- $type eq 'item' ? 'the ' . $section . ' entry' :
- 'the section on ' . $section ) .
- ($page ? ($section ? ' in ':''). 'the ' . $page . ' manpage' :
- 'elsewhere in this document');
- # for being marked up later
- $self->{_markup} =
- $alttext ? '<SECTON>' . $alttext . '<SECTOFF>' : (
- !$section ? '' :
- $type eq 'item' ? 'the <SECTON>' . $section . '<SECTOFF> entry' :
- 'the section on <SECTON>' . $section . '<SECTOFF>' ) .
- ($page ? ($section ? ' in ':'') . 'the <PAGEON>' .
- $page . '<PAGEOFF> manpage' :
- ' elsewhere in this document');
-}
-
-# include markup
-sub markup {
- my ($self,$on,$off,$pageon,$pageoff) = @_;
- $on ||= '';
- $off ||= '';
- $pageon ||= '';
- $pageoff ||= '';
- $_[0]->_construct_text;
- my $str = $self->{_markup};
- $str =~ s/<SECTON>/$on/;
- $str =~ s/<SECTOFF>/$off/;
- $str =~ s/<PAGEON>/$pageon/;
- $str =~ s/<PAGEOFF>/$pageoff/;
- return $str;
-}
-
-# The complete link's text
-sub text {
- $_[0]->_construct_text();
- $_[0]->{_text};
-}
-
-# The POD page the link appears on
-sub warning {
- my $self = shift;
- if(@_) {
- push(@{$self->{_warnings}}, @_);
- return @_;
- }
- return @{$self->{_warnings}};
-}
-
-# The POD file name the link appears in
-sub file {
- return (@_ > 1) ? ($_[0]->{-file} = $_[1]) : $_[0]->{-file};
-}
-
-# The line in the file the link appears
-sub line {
- return (@_ > 1) ? ($_[0]->{-line} = $_[1]) : $_[0]->{-line};
-}
-
-# The POD page the link appears on
-sub page {
- return (@_ > 1) ? ($_[0]->{-page} = $_[1]) : $_[0]->{-page};
-}
-
-# The link destination
-sub node {
- return (@_ > 1) ? ($_[0]->{-node} = $_[1]) : $_[0]->{-node};
-}
-
-# Potential alternative text
-sub alttext {
- return (@_ > 1) ? ($_[0]->{-alttext} = $_[1]) : $_[0]->{-alttext};
-}
-
-# The type
-sub type {
- return (@_ > 1) ? ($_[0]->{-type} = $_[1]) : $_[0]->{-type};
-}
-
-sub _invalid_link {
- my ($msg) = @_;
- # this sets @_
- #eval { die "$msg\n" };
- #chomp $@;
- $@ = $msg; # this seems to work, too!
- undef;
}
1;
--- /dev/null
+#############################################################################
+# Pod/ParseUtils.pm -- helpers for POD parsing and conversion
+#
+# Copyright (C) 1999 by Marek Rouchal. All rights reserved.
+# This file is part of "PodParser". PodParser is free software;
+# you can redistribute it and/or modify it under the same terms
+# as Perl itself.
+#############################################################################
+
+package Pod::ParseUtils;
+
+use vars qw($VERSION);
+$VERSION = 0.2; ## Current version of this package
+require 5.004; ## requires this Perl version or later
+
+=head1 NAME
+
+Pod::ParseUtils - helpers for POD parsing and conversion
+
+=head1 SYNOPSIS
+
+ use Pod::ParseUtils;
+
+ my $list = new Pod::List;
+ my $link = Pod::Hyperlink->new('Pod::Parser');
+
+=head1 DESCRIPTION
+
+B<Pod::ParseUtils> contains a few object-oriented helper packages for
+POD parsing and processing (i.e. in POD formatters and translators).
+
+=cut
+
+#-----------------------------------------------------------------------------
+# Pod::List
+#
+# class to hold POD list info (=over, =item, =back)
+#-----------------------------------------------------------------------------
+
+package Pod::List;
+
+use Carp;
+
+=head2 Pod::List
+
+B<Pod::List> can be used to hold information about POD lists
+(written as =over ... =item ... =back) for further processing.
+The following methods are available:
+
+=over 4
+
+=item new()
+
+Create a new list object. Properties may be specified through a hash
+reference like this:
+
+ my $list = Pod::List->new({ -start => $., -indent => 4 });
+
+See the individual methods/properties for details.
+
+=cut
+
+sub new {
+ my $this = shift;
+ my $class = ref($this) || $this;
+ my %params = @_;
+ my $self = {%params};
+ bless $self, $class;
+ $self->initialize();
+ return $self;
+}
+
+sub initialize {
+ my $self = shift;
+ $self->{-file} ||= 'unknown';
+ $self->{-start} ||= 'unknown';
+ $self->{-indent} ||= 4; # perlpod: "should be the default"
+ $self->{_items} = [];
+ $self->{-type} ||= '';
+}
+
+=item file()
+
+Without argument, retrieves the file name the list is in. This must
+have been set before by either specifying B<-file> in the B<new()>
+method or by calling the B<file()> method with a scalar argument.
+
+=cut
+
+# The POD file name the list appears in
+sub file {
+ return (@_ > 1) ? ($_[0]->{-file} = $_[1]) : $_[0]->{-file};
+}
+
+=item start()
+
+Without argument, retrieves the line number where the list started.
+This must have been set before by either specifying B<-start> in the
+B<new()> method or by calling the B<start()> method with a scalar
+argument.
+
+=cut
+
+# The line in the file the node appears
+sub start {
+ return (@_ > 1) ? ($_[0]->{-start} = $_[1]) : $_[0]->{-start};
+}
+
+=item indent()
+
+Without argument, retrieves the indent level of the list as specified
+in C<=over n>. This must have been set before by either specifying
+B<-indent> in the B<new()> method or by calling the B<indent()> method
+with a scalar argument.
+
+=cut
+
+# indent level
+sub indent {
+ return (@_ > 1) ? ($_[0]->{-indent} = $_[1]) : $_[0]->{-indent};
+}
+
+=item type()
+
+Without argument, retrieves the list type, which can be an arbitrary value,
+e.g. C<OL>, C<UL>, ... when thinking the HTML way.
+This must have been set before by either specifying
+B<-type> in the B<new()> method or by calling the B<type()> method
+with a scalar argument.
+
+=cut
+
+# The type of the list (UL, OL, ...)
+sub type {
+ return (@_ > 1) ? ($_[0]->{-type} = $_[1]) : $_[0]->{-type};
+}
+
+=item rx()
+
+Without argument, retrieves a regular expression for simplifying the
+individual item strings once the list type has been determined. Usage:
+E.g. when converting to HTML, one might strip the leading number in
+an ordered list as C<E<lt>OLE<gt>> already prints numbers itself.
+This must have been set before by either specifying
+B<-rx> in the B<new()> method or by calling the B<rx()> method
+with a scalar argument.
+
+=cut
+
+# The regular expression to simplify the items
+sub rx {
+ return (@_ > 1) ? ($_[0]->{-rx} = $_[1]) : $_[0]->{-rx};
+}
+
+=item item()
+
+Without argument, retrieves the array of the items in this list.
+The items may be represented by any scalar.
+If an argument has been given, it is pushed on the list of items.
+
+=cut
+
+# The individual =items of this list
+sub item {
+ my ($self,$item) = @_;
+ if(defined $item) {
+ push(@{$self->{_items}}, $item);
+ return $item;
+ }
+ else {
+ return @{$self->{_items}};
+ }
+}
+
+=item parent()
+
+Without argument, retrieves information about the parent holding this
+list, which is represented as an arbitrary scalar.
+This must have been set before by either specifying
+B<-parent> in the B<new()> method or by calling the B<parent()> method
+with a scalar argument.
+
+=cut
+
+# possibility for parsers/translators to store information about the
+# lists's parent object
+sub parent {
+ return (@_ > 1) ? ($_[0]->{-parent} = $_[1]) : $_[0]->{-parent};
+}
+
+=item tag()
+
+Without argument, retrieves information about the list tag, which can be
+any scalar.
+This must have been set before by either specifying
+B<-tag> in the B<new()> method or by calling the B<tag()> method
+with a scalar argument.
+
+=back
+
+=cut
+
+# possibility for parsers/translators to store information about the
+# list's object
+sub tag {
+ return (@_ > 1) ? ($_[0]->{-tag} = $_[1]) : $_[0]->{-tag};
+}
+
+#-----------------------------------------------------------------------------
+# Pod::Hyperlink
+#
+# class to manipulate POD hyperlinks (L<>)
+#-----------------------------------------------------------------------------
+
+package Pod::Hyperlink;
+
+=head2 Pod::Hyperlink
+
+B<Pod::Hyperlink> is a class for manipulation of POD hyperlinks. Usage:
+
+ my $link = Pod::Hyperlink->new('alternative text|page/"section in page"');
+
+The B<Pod::Hyperlink> class is mainly designed to parse the contents of the
+C<LE<lt>...E<gt>> sequence, providing a simple interface for accessing the
+different parts of a POD hyperlink for further processing. It can also be
+used to construct hyperlinks.
+
+=over 4
+
+=item new()
+
+The B<new()> method can either be passed a set of key/value pairs or a single
+scalar value, namely the contents of a C<LE<lt>...E<gt>> sequence. An object
+of the class C<Pod::Hyperlink> is returned. The value C<undef> indicates a
+failure, the error message is stored in C<$@>.
+
+=cut
+
+use Carp;
+
+sub new {
+ my $this = shift;
+ my $class = ref($this) || $this;
+ my $self = +{};
+ bless $self, $class;
+ $self->initialize();
+ if(defined $_[0]) {
+ if(ref($_[0])) {
+ # called with a list of parameters
+ %$self = %{$_[0]};
+ $self->_construct_text();
+ }
+ else {
+ # called with L<> contents
+ return undef unless($self->parse($_[0]));
+ }
+ }
+ return $self;
+}
+
+sub initialize {
+ my $self = shift;
+ $self->{-line} ||= 'undef';
+ $self->{-file} ||= 'undef';
+ $self->{-page} ||= '';
+ $self->{-node} ||= '';
+ $self->{-alttext} ||= '';
+ $self->{-type} ||= 'undef';
+ $self->{_warnings} = [];
+}
+
+=item parse($string)
+
+This method can be used to (re)parse a (new) hyperlink, i.e. the contents
+of a C<LE<lt>...E<gt>> sequence. The result is stored in the current object.
+
+=cut
+
+sub parse {
+ my $self = shift;
+ local($_) = $_[0];
+ # syntax check the link and extract destination
+ my ($alttext,$page,$node,$type) = ('','','','');
+
+ $self->{_warnings} = [];
+
+ # collapse newlines with whitespace
+ if(s/\s*\n+\s*/ /g) {
+ $self->warning("collapsing newlines to blanks");
+ }
+ # strip leading/trailing whitespace
+ if(s/^[\s\n]+//) {
+ $self->warning("ignoring leading whitespace in link");
+ }
+ if(s/[\s\n]+$//) {
+ $self->warning("ignoring trailing whitespace in link");
+ }
+ unless(length($_)) {
+ _invalid_link("empty link");
+ return undef;
+ }
+
+ ## Check for different possibilities. This is tedious and error-prone
+ # we match all possibilities (alttext, page, section/item)
+ #warn "DEBUG: link=$_\n";
+
+ # only page
+ if(m!^(\w+(?:::\w+)*)\s*(\(\w*\)|)$!) {
+ $page = $1 . $2;
+ $type = 'page';
+ }
+ # alttext, page and section
+ elsif(m!^(.+?)\s*[|]\s*(\w+(?:::\w+)*)\s*(\(\w*\)|)\s*/\s*"(.+)"$!) {
+ ($alttext, $page, $node) = ($1, $2 . $3, $4);
+ $type = 'section';
+ }
+ # page and section
+ elsif(m!^(\w+(?:::\w+)*)\s*(\(\w*\)|)\s*/\s*"(.+)"$!) {
+ ($page, $node) = ($1 . $2, $3);
+ $type = 'section';
+ }
+ # page and item
+ elsif(m!^(\w+(?:::\w+)*)\s*(\(\w*\)|)\s*/\s*(.+)$!) {
+ ($page, $node) = ($1 . $2, $3);
+ $type = 'item';
+ }
+ # only section
+ elsif(m!^(?:/\s*|)"(.+)"$!) {
+ $node = $1;
+ $type = 'section';
+ }
+ # only item
+ elsif(m!^/(.+)$!) {
+ $node = $1;
+ $type = 'item';
+ }
+ # non-standard: Hyperlink
+ elsif(m!^((?:http|ftp|mailto|news):.+)$!i) {
+ $node = $1;
+ $type = 'hyperlink';
+ }
+ # alttext, page and item
+ elsif(m!^(.+?)\s*[|]\s*(\w+(?:::\w+)*)\s*(\(\w*\)|)\s*/\s*(.+)$!) {
+ ($alttext, $page, $node) = ($1, $2 . $3, $4);
+ $type = 'item';
+ }
+ # alttext and page
+ elsif(m!^(.+?)\s*[|]\s*(\w+(?:::\w+)*)\s*(\(\w*\)|)$!) {
+ ($alttext, $page) = ($1, $2 . $3);
+ $type = 'page';
+ }
+ # alttext and section
+ elsif(m!^(.+?)\s*[|]\s*(?:/\s*|)"(.+)"$!) {
+ ($alttext, $node) = ($1,$2);
+ $type = 'section';
+ }
+ # alttext and item
+ elsif(m!^(.+?)\s*[|]\s*/(.+)$!) {
+ ($alttext, $node) = ($1,$2);
+ }
+ # nonstandard: alttext and hyperlink
+ elsif(m!^(.+?)\s*[|]\s*((?:http|ftp|mailto|news):.+)$!) {
+ ($alttext, $node) = ($1,$2);
+ $type = 'hyperlink';
+ }
+ # must be an item or a "malformed" section (without "")
+ else {
+ $node = $_;
+ $type = 'item';
+ }
+
+ if($page =~ /[(]\w*[)]$/) {
+ $self->warning("section in `$page' deprecated");
+ }
+ $self->{-page} = $page;
+ $self->{-node} = $node;
+ $self->{-alttext} = $alttext;
+ #warn "DEBUG: page=$page section=$section item=$item alttext=$alttext\n";
+ $self->{-type} = $type;
+ $self->_construct_text();
+ 1;
+}
+
+sub _construct_text {
+ my $self = shift;
+ my $alttext = $self->alttext();
+ my $type = $self->type();
+ my $section = $self->node();
+ my $page = $self->page();
+ my $page_ext = '';
+ $page =~ s/([(]\w*[)])$// && ($page_ext = $1);
+ if($alttext) {
+ $self->{_text} = $alttext;
+ }
+ elsif($type eq 'hyperlink') {
+ $self->{_text} = $section;
+ }
+ else {
+ $self->{_text} = (!$section ? '' :
+ $type eq 'item' ? "the $section entry" :
+ "the section on $section" ) .
+ ($page ? ($section ? ' in ':'') . "the $page$page_ext manpage" :
+ ' elsewhere in this document');
+ }
+ # for being marked up later
+ # use the non-standard markers P<> and Q<>, so that the resulting
+ # text can be parsed by the translators. It's their job to put
+ # the correct hypertext around the linktext
+ if($alttext) {
+ $self->{_markup} = "Q<$alttext>";
+ }
+ elsif($type eq 'hyperlink') {
+ $self->{_markup} = "Q<$section>";
+ }
+ else {
+ $self->{_markup} = (!$section ? '' :
+ $type eq 'item' ? "the Q<$section> entry" :
+ "the section on Q<$section>" ) .
+ ($page ? ($section ? ' in ':'') . "the P<$page>$page_ext manpage" :
+ ' elsewhere in this document');
+ }
+}
+
+=item markup($string)
+
+Set/retrieve the textual value of the link. This string contains special
+markers C<PE<lt>E<gt>> and C<QE<lt>E<gt>> that should be expanded by the
+translator's interior sequence expansion engine to the
+formatter-specific code to highlight/activate the hyperlink. The details
+have to be implemented in the translator.
+
+=cut
+
+#' retrieve/set markuped text
+sub markup {
+ return (@_ > 1) ? ($_[0]->{_markup} = $_[1]) : $_[0]->{_markup};
+}
+
+=item text()
+
+This method returns the textual representation of the hyperlink as above,
+but without markers (read only). Depending on the link type this is one of
+the following alternatives (the + and * denote the portions of the text
+that are marked up):
+
+ the +perl+ manpage
+ the *$|* entry in the +perlvar+ manpage
+ the section on *OPTIONS* in the +perldoc+ manpage
+ the section on *DESCRIPTION* elsewhere in this document
+
+=cut
+
+# The complete link's text
+sub text {
+ $_[0]->{_text};
+}
+
+=item warning()
+
+After parsing, this method returns any warnings encountered during the
+parsing process.
+
+=cut
+
+# Set/retrieve warnings
+sub warning {
+ my $self = shift;
+ if(@_) {
+ push(@{$self->{_warnings}}, @_);
+ return @_;
+ }
+ return @{$self->{_warnings}};
+}
+
+=item line(), file()
+
+Just simple slots for storing information about the line and the file
+the link was encountered in. Has to be filled in manually.
+
+=cut
+
+# The line in the file the link appears
+sub line {
+ return (@_ > 1) ? ($_[0]->{-line} = $_[1]) : $_[0]->{-line};
+}
+
+# The POD file name the link appears in
+sub file {
+ return (@_ > 1) ? ($_[0]->{-file} = $_[1]) : $_[0]->{-file};
+}
+
+=item page()
+
+This method sets or returns the POD page this link points to.
+
+=cut
+
+# The POD page the link appears on
+sub page {
+ if (@_ > 1) {
+ $_[0]->{-page} = $_[1];
+ $_[0]->_construct_text();
+ }
+ $_[0]->{-page};
+}
+
+=item node()
+
+As above, but the destination node text of the link.
+
+=cut
+
+# The link destination
+sub node {
+ if (@_ > 1) {
+ $_[0]->{-node} = $_[1];
+ $_[0]->_construct_text();
+ }
+ $_[0]->{-node};
+}
+
+=item alttext()
+
+Sets or returns an alternative text specified in the link.
+
+=cut
+
+# Potential alternative text
+sub alttext {
+ if (@_ > 1) {
+ $_[0]->{-alttext} = $_[1];
+ $_[0]->_construct_text();
+ }
+ $_[0]->{-alttext};
+}
+
+=item type()
+
+The node type, either C<section> or C<item>. As an unofficial type,
+there is also C<hyperlink>, derived from e.g. C<LE<lt>http://perl.comE<gt>>
+
+=cut
+
+# The type: item or headn
+sub type {
+ return (@_ > 1) ? ($_[0]->{-type} = $_[1]) : $_[0]->{-type};
+}
+
+=item link()
+
+Returns the link as contents of C<LE<lt>E<gt>>. Reciprocal to B<parse()>.
+
+=back
+
+=cut
+
+# The link itself
+sub link {
+ my $self = shift;
+ my $link = $self->page() || '';
+ if($self->node()) {
+ if($self->type() eq 'section') {
+ $link .= ($link ? '/' : '') . '"' . $self->node() . '"';
+ }
+ elsif($self->type() eq 'hyperlink') {
+ $link = $self->node();
+ }
+ else { # item
+ $link .= '/' . $self->node();
+ }
+ }
+ if($self->alttext()) {
+ $link = $self->alttext() . '|' . $link;
+ }
+ $link;
+}
+
+sub _invalid_link {
+ my ($msg) = @_;
+ # this sets @_
+ #eval { die "$msg\n" };
+ #chomp $@;
+ $@ = $msg; # this seems to work, too!
+ undef;
+}
+
+#-----------------------------------------------------------------------------
+# Pod::Cache
+#
+# class to hold POD page details
+#-----------------------------------------------------------------------------
+
+package Pod::Cache;
+
+=head2 Pod::Cache
+
+B<Pod::Cache> holds information about a set of POD documents,
+especially the nodes for hyperlinks.
+The following methods are available:
+
+=over 4
+
+=item new()
+
+Create a new cache object. This object can hold an arbitrary number of
+POD documents of class Pod::Cache::Item.
+
+=cut
+
+sub new {
+ my $this = shift;
+ my $class = ref($this) || $this;
+ my $self = [];
+ bless $self, $class;
+ return $self;
+}
+
+=item item()
+
+Add a new item to the cache. Without arguments, this method returns a
+list of all cache elements.
+
+=cut
+
+sub item {
+ my ($self,%param) = @_;
+ if(%param) {
+ my $item = Pod::Cache::Item->new(%param);
+ push(@$self, $item);
+ return $item;
+ }
+ else {
+ return @{$self};
+ }
+}
+
+=item find_page($name)
+
+Look for a POD document named C<$name> in the cache. Returns the
+reference to the corresponding Pod::Cache::Item object or undef if
+not found.
+
+=back
+
+=cut
+
+sub find_page {
+ my ($self,$page) = @_;
+ foreach(@$self) {
+ if($_->page() eq $page) {
+ return $_;
+ }
+ }
+ undef;
+}
+
+package Pod::Cache::Item;
+
+=head2 Pod::Cache::Item
+
+B<Pod::Cache::Item> holds information about individual POD documents,
+that can be grouped in a Pod::Cache object.
+It is intended to hold information about the hyperlink nodes of POD
+documents.
+The following methods are available:
+
+=over 4
+
+=item new()
+
+Create a new object.
+
+=cut
+
+sub new {
+ my $this = shift;
+ my $class = ref($this) || $this;
+ my %params = @_;
+ my $self = {%params};
+ bless $self, $class;
+ $self->initialize();
+ return $self;
+}
+
+sub initialize {
+ my $self = shift;
+ $self->{-nodes} = [] unless(defined $self->{-nodes});
+}
+
+=item page()
+
+Set/retrieve the POD document name (e.g. "Pod::Parser").
+
+=cut
+
+# The POD page
+sub page {
+ return (@_ > 1) ? ($_[0]->{-page} = $_[1]) : $_[0]->{-page};
+}
+
+=item description()
+
+Set/retrieve the POD short description as found in the C<=head1 NAME>
+section.
+
+=cut
+
+# The POD description, taken out of NAME if present
+sub description {
+ return (@_ > 1) ? ($_[0]->{-description} = $_[1]) : $_[0]->{-description};
+}
+
+=item path()
+
+Set/retrieve the POD file storage path.
+
+=cut
+
+# The file path
+sub path {
+ return (@_ > 1) ? ($_[0]->{-path} = $_[1]) : $_[0]->{-path};
+}
+
+=item file()
+
+Set/retrieve the POD file name.
+
+=cut
+
+# The POD file name
+sub file {
+ return (@_ > 1) ? ($_[0]->{-file} = $_[1]) : $_[0]->{-file};
+}
+
+=item nodes()
+
+Add a node (or a list of nodes) to the document's node list. Note that
+the order is kept, i.e. start with the first node and end with the last.
+If no argument is given, the current list of nodes is returned in the
+same order the nodes have been added.
+A node can be any scalar, but usually is a pair of node string and
+unique id for the C<find_node> method to work correctly.
+
+=cut
+
+# The POD nodes
+sub nodes {
+ my ($self,@nodes) = @_;
+ if(@nodes) {
+ push(@{$self->{-nodes}}, @nodes);
+ return @nodes;
+ }
+ else {
+ return @{$self->{-nodes}};
+ }
+}
+
+=item find_node($name)
+
+Look for a node named C<$name> in the object's node list. Returns the
+unique id of the node (i.e. the second element of the array stored in
+the node arry) or undef if not found.
+
+=back
+
+=cut
+
+sub find_node {
+ my ($self,$node) = @_;
+ foreach(@{$self->{-nodes}}) {
+ if($_->[0] eq $node) {
+ return $_->[1]; # id
+ }
+ }
+ undef;
+}
+
+
+=head1 AUTHOR
+
+Marek Rouchal E<lt>marek@saftsack.fs.uni-bayreuth.deE<gt>, borrowing
+a lot of things from L<pod2man> and L<pod2roff> as well as other POD
+processing tools by Tom Christiansen, Brad Appleton and Russ Allbery.
+
+=head1 SEE ALSO
+
+L<pod2man>, L<pod2roff>, L<Pod::Parser>, L<Pod::Checker>,
+L<pod2html>
+
+=cut
+
+1;
projects / p5sagit/p5-mst-13.2.git / commitdiff