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-
- package Pod::Simple::BlackBox;
- #
- # "What's in the box?" "Pain."
- #
- ###########################################################################
- #
- # This is where all the scary things happen: parsing lines into
- # paragraphs; and then into directives, verbatims, and then also
- # turning formatting sequences into treelets.
- #
- # Are you really sure you want to read this code?
- #
- #-----------------------------------------------------------------------------
- #
- # The basic work of this module Pod::Simple::BlackBox is doing the dirty work
- # of parsing Pod into treelets (generally one per non-verbatim paragraph), and
- # to call the proper callbacks on the treelets.
- #
- # Every node in a treelet is a ['name', {attrhash}, ...children...]
-
- use integer; # vroom!
- use strict;
- use Carp ();
- BEGIN {
- require Pod::Simple;
- *DEBUG = \&Pod::Simple::DEBUG unless defined &DEBUG
- }
-
- #@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
-
- sub parse_line { shift->parse_lines(@_) } # alias
-
- # - - - Turn back now! Run away! - - -
-
- sub parse_lines { # Usage: $parser->parse_lines(@lines)
- # an undef means end-of-stream
- my $self = shift;
-
- my $code_handler = $self->{'code_handler'};
- my $cut_handler = $self->{'cut_handler'};
- $self->{'line_count'} ||= 0;
-
- my $scratch;
-
- DEBUG > 4 and
- print "# Parsing starting at line ", $self->{'line_count'}, ".\n";
-
- DEBUG > 5 and
- print "# About to parse lines: ",
- join(' ', map defined($_) ? "[$_]" : "EOF", @_), "\n";
-
- my $paras = ($self->{'paras'} ||= []);
- # paragraph buffer. Because we need to defer processing of =over
- # directives and verbatim paragraphs. We call _ponder_paragraph_buffer
- # to process this.
-
- $self->{'pod_para_count'} ||= 0;
-
- my $line;
- foreach my $source_line (@_) {
- if( $self->{'source_dead'} ) {
- DEBUG > 4 and print "# Source is dead.\n";
- last;
- }
-
- unless( defined $source_line ) {
- DEBUG > 4 and print "# Undef-line seen.\n";
-
- push @$paras, ['~end', {'start_line' => $self->{'line_count'}}];
- push @$paras, $paras->[-1], $paras->[-1];
- # So that it definitely fills the buffer.
- $self->{'source_dead'} = 1;
- $self->_ponder_paragraph_buffer;
- next;
- }
-
-
- if( $self->{'line_count'}++ ) {
- ($line = $source_line) =~ tr/\n\r//d;
- # If we don't have two vars, we'll end up with that there
- # tr/// modding the (potentially read-only) original source line!
-
- } else {
- DEBUG > 2 and print "First line: [$source_line]\n";
-
- if( ($line = $source_line) =~ s/^\xEF\xBB\xBF//s ) {
- DEBUG and print "UTF-8 BOM seen. Faking a '=encode utf8'.\n";
- $self->_handle_encoding_line( "=encode utf8" );
- $line =~ tr/\n\r//d;
-
- } elsif( $line =~ s/^\xFE\xFF//s ) {
- DEBUG and print "Big-endian UTF-16 BOM seen. Aborting parsing.\n";
- $self->scream(
- $self->{'line_count'},
- "UTF16-BE Byte Encoding Mark found; but Pod::Simple v$Pod::Simple::VERSION doesn't implement UTF16 yet."
- );
- splice @_;
- push @_, undef;
- next;
-
- # TODO: implement somehow?
-
- } elsif( $line =~ s/^\xFF\xFE//s ) {
- DEBUG and print "Little-endian UTF-16 BOM seen. Aborting parsing.\n";
- $self->scream(
- $self->{'line_count'},
- "UTF16-LE Byte Encoding Mark found; but Pod::Simple v$Pod::Simple::VERSION doesn't implement UTF16 yet."
- );
- splice @_;
- push @_, undef;
- next;
-
- # TODO: implement somehow?
-
- } else {
- DEBUG > 2 and print "First line is BOM-less.\n";
- ($line = $source_line) =~ tr/\n\r//d;
- }
- }
-
-
- DEBUG > 5 and print "# Parsing line: [$line]\n";
-
- if(!$self->{'in_pod'}) {
- if($line =~ m/^=([a-zA-Z]+)/s) {
- if($1 eq 'cut') {
- $self->scream(
- $self->{'line_count'},
- "=cut found outside a pod block. Skipping to next block."
- );
-
- ## Before there were errata sections in the world, it was
- ## least-pessimal to abort processing the file. But now we can
- ## just barrel on thru (but still not start a pod block).
- #splice @_;
- #push @_, undef;
-
- next;
- } else {
- $self->{'in_pod'} = $self->{'start_of_pod_block'}
- = $self->{'last_was_blank'} = 1;
- # And fall thru to the pod-mode block further down
- }
- } else {
- DEBUG > 5 and print "# It's a code-line.\n";
- $code_handler->(map $_, $line, $self->{'line_count'}, $self)
- if $code_handler;
- # Note: this may cause code to be processed out of order relative
- # to pods, but in order relative to cuts.
-
- # Note also that we haven't yet applied the transcoding to $line
- # by time we call $code_handler!
-
- if( $line =~ m/^#\s*line\s+(\d+)\s*(?:\s"([^"]+)")?\s*$/ ) {
- # That RE is from perlsyn, section "Plain Old Comments (Not!)",
- #$fname = $2 if defined $2;
- #DEBUG > 1 and defined $2 and print "# Setting fname to \"$fname\"\n";
- DEBUG > 1 and print "# Setting nextline to $1\n";
- $self->{'line_count'} = $1 - 1;
- }
-
- next;
- }
- }
-
- # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- # Else we're in pod mode:
-
- # Apply any necessary transcoding:
- $self->{'_transcoder'} && $self->{'_transcoder'}->($line);
-
- # HERE WE CATCH =encoding EARLY!
- if( $line =~ m/^=encoding\s+\S+\s*$/s ) {
- $line = $self->_handle_encoding_line( $line );
- }
-
- if($line =~ m/^=cut/s) {
- # here ends the pod block, and therefore the previous pod para
- DEBUG > 1 and print "Noting =cut at line ${$self}{'line_count'}\n";
- $self->{'in_pod'} = 0;
- # ++$self->{'pod_para_count'};
- $self->_ponder_paragraph_buffer();
- # by now it's safe to consider the previous paragraph as done.
- $cut_handler->(map $_, $line, $self->{'line_count'}, $self)
- if $cut_handler;
-
- # TODO: add to docs: Note: this may cause cuts to be processed out
- # of order relative to pods, but in order relative to code.
-
- } elsif($line =~ m/^\s*$/s) { # it's a blank line
- if(!$self->{'start_of_pod_block'} and @$paras and $paras->[-1][0] eq '~Verbatim') {
- DEBUG > 1 and print "Saving blank line at line ${$self}{'line_count'}\n";
- push @{$paras->[-1]}, $line;
- } # otherwise it's not interesting
-
- if(!$self->{'start_of_pod_block'} and !$self->{'last_was_blank'}) {
- DEBUG > 1 and print "Noting para ends with blank line at ${$self}{'line_count'}\n";
- }
-
- $self->{'last_was_blank'} = 1;
-
- } elsif($self->{'last_was_blank'}) { # A non-blank line starting a new para...
-
- if($line =~ m/^(=[a-zA-Z][a-zA-Z0-9]*)(?:\s+|$)(.*)/s) {
- # THIS IS THE ONE PLACE WHERE WE CONSTRUCT NEW DIRECTIVE OBJECTS
- my $new = [$1, {'start_line' => $self->{'line_count'}}, $2];
- # Note that in "=head1 foo", the WS is lost.
- # Example: ['=head1', {'start_line' => 123}, ' foo']
-
- ++$self->{'pod_para_count'};
-
- $self->_ponder_paragraph_buffer();
- # by now it's safe to consider the previous paragraph as done.
-
- push @$paras, $new; # the new incipient paragraph
- DEBUG > 1 and print "Starting new ${$paras}[-1][0] para at line ${$self}{'line_count'}\n";
-
- } elsif($line =~ m/^\s/s) {
-
- if(!$self->{'start_of_pod_block'} and @$paras and $paras->[-1][0] eq '~Verbatim') {
- DEBUG > 1 and print "Resuming verbatim para at line ${$self}{'line_count'}\n";
- push @{$paras->[-1]}, $line;
- } else {
- ++$self->{'pod_para_count'};
- $self->_ponder_paragraph_buffer();
- # by now it's safe to consider the previous paragraph as done.
- DEBUG > 1 and print "Starting verbatim para at line ${$self}{'line_count'}\n";
- push @$paras, ['~Verbatim', {'start_line' => $self->{'line_count'}}, $line];
- }
- } else {
- ++$self->{'pod_para_count'};
- $self->_ponder_paragraph_buffer();
- # by now it's safe to consider the previous paragraph as done.
- push @$paras, ['~Para', {'start_line' => $self->{'line_count'}}, $line];
- DEBUG > 1 and print "Starting plain para at line ${$self}{'line_count'}\n";
- }
- $self->{'last_was_blank'} = $self->{'start_of_pod_block'} = 0;
-
- } else {
- # It's a non-blank line /continuing/ the current para
- if(@$paras) {
- DEBUG > 2 and print "Line ${$self}{'line_count'} continues current paragraph\n";
- push @{$paras->[-1]}, $line;
- } else {
- # Unexpected case!
- die "Continuing a paragraph but \@\$paras is empty?";
- }
- $self->{'last_was_blank'} = $self->{'start_of_pod_block'} = 0;
- }
-
- } # ends the big while loop
-
- DEBUG > 1 and print(pretty(@$paras), "\n");
- return $self;
- }
-
- #@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
-
- sub _handle_encoding_line {
- my($self, $line) = @_;
-
- # The point of this routine is to set $self->{'_transcoder'} as indicated.
-
- return $line unless $line =~ m/^=encoding\s+(\S+)\s*$/s;
- DEBUG > 1 and print "Found an encoding line \"=encoding $1\"\n";
-
- my $e = $1;
- my $orig = $e;
- push @{ $self->{'encoding_command_reqs'} }, "=encoding $orig";
-
- my $enc_error;
-
- # Cf. perldoc Encode and perldoc Encode::Supported
-
- require Pod::Simple::Transcode;
-
- if( $self->{'encoding'} ) {
- my $norm_current = $self->{'encoding'};
- my $norm_e = $e;
- foreach my $that ($norm_current, $norm_e) {
- $that = lc($that);
- $that =~ s/[-_]//g;
- }
- if($norm_current eq $norm_e) {
- DEBUG > 1 and print "The '=encoding $orig' line is ",
- "redundant. ($norm_current eq $norm_e). Ignoring.\n";
- $enc_error = '';
- # But that doesn't necessarily mean that the earlier one went okay
- } else {
- $enc_error = "Encoding is already set to " . $self->{'encoding'};
- DEBUG > 1 and print $enc_error;
- }
- } elsif (
- # OK, let's turn on the encoding
- do {
- DEBUG > 1 and print " Setting encoding to $e\n";
- $self->{'encoding'} = $e;
- 1;
- }
- and $e eq 'HACKRAW'
- ) {
- DEBUG and print " Putting in HACKRAW (no-op) encoding mode.\n";
-
- } elsif( Pod::Simple::Transcode::->encoding_is_available($e) ) {
-
- die($enc_error = "WHAT? _transcoder is already set?!")
- if $self->{'_transcoder'}; # should never happen
- require Pod::Simple::Transcode;
- $self->{'_transcoder'} = Pod::Simple::Transcode::->make_transcoder($e);
- eval {
- my @x = ('', "abc", "123");
- $self->{'_transcoder'}->(@x);
- };
- $@ && die( $enc_error =
- "Really unexpected error setting up encoding $e: $@\nAborting"
- );
-
- } else {
- my @supported = Pod::Simple::Transcode::->all_encodings;
-
- # Note unsupported, and complain
- DEBUG and print " Encoding [$e] is unsupported.",
- "\nSupporteds: @supported\n";
- my $suggestion = '';
-
- # Look for a near match:
- my $norm = lc($e);
- $norm =~ tr[-_][]d;
- my $n;
- foreach my $enc (@supported) {
- $n = lc($enc);
- $n =~ tr[-_][]d;
- next unless $n eq $norm;
- $suggestion = " (Maybe \"$e\" should be \"$enc\"?)";
- last;
- }
- my $encmodver = Pod::Simple::Transcode::->encmodver;
- $enc_error = join '' =>
- "This document probably does not appear as it should, because its ",
- "\"=encoding $e\" line calls for an unsupported encoding.",
- $suggestion, " [$encmodver\'s supported encodings are: @supported]"
- ;
-
- $self->scream( $self->{'line_count'}, $enc_error );
- }
- push @{ $self->{'encoding_command_statuses'} }, $enc_error;
-
- return '=encoding ALREADYDONE';
- }
-
- # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
- sub _handle_encoding_second_level {
- # By time this is called, the encoding (if well formed) will already
- # have been acted one.
- my($self, $para) = @_;
- my @x = @$para;
- my $content = join ' ', splice @x, 2;
- $content =~ s/^\s+//s;
- $content =~ s/\s+$//s;
-
- DEBUG > 2 and print "Ogling encoding directive: =encoding $content\n";
-
- if($content eq 'ALREADYDONE') {
- # It's already been handled. Check for errors.
- if(! $self->{'encoding_command_statuses'} ) {
- DEBUG > 2 and print " CRAZY ERROR: It wasn't really handled?!\n";
- } elsif( $self->{'encoding_command_statuses'}[-1] ) {
- $self->whine( $para->[1]{'start_line'},
- sprintf "Couldn't do %s: %s",
- $self->{'encoding_command_reqs' }[-1],
- $self->{'encoding_command_statuses'}[-1],
- );
- } else {
- DEBUG > 2 and print " (Yup, it was successfully handled already.)\n";
- }
-
- } else {
- # Otherwise it's a syntax error
- $self->whine( $para->[1]{'start_line'},
- "Invalid =encoding syntax: $content"
- );
- }
-
- return;
- }
-
- #~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`~`
-
- {
- my $m = -321; # magic line number
-
- sub _gen_errata {
- my $self = $_[0];
- # Return 0 or more fake-o paragraphs explaining the accumulated
- # errors on this document.
-
- return() unless $self->{'errata'} and keys %{$self->{'errata'}};
-
- my @out;
-
- foreach my $line (sort {$a <=> $b} keys %{$self->{'errata'}}) {
- push @out,
- ['=item', {'start_line' => $m}, "Around line $line:"],
- map( ['~Para', {'start_line' => $m, '~cooked' => 1},
- #['~Top', {'start_line' => $m},
- $_
- #]
- ],
- @{$self->{'errata'}{$line}}
- )
- ;
- }
-
- # TODO: report of unknown entities? unrenderable characters?
-
- unshift @out,
- ['=head1', {'start_line' => $m, 'errata' => 1}, 'POD ERRORS'],
- ['~Para', {'start_line' => $m, '~cooked' => 1, 'errata' => 1},
- "Hey! ",
- ['B', {},
- 'The above document had some coding errors, which are explained below:'
- ]
- ],
- ['=over', {'start_line' => $m, 'errata' => 1}, ''],
- ;
-
- push @out,
- ['=back', {'start_line' => $m, 'errata' => 1}, ''],
- ;
-
- DEBUG and print "\n<<\n", pretty(\@out), "\n>>\n\n";
-
- return @out;
- }
-
- }
-
- #@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
-
- ##############################################################################
- ##
- ## stop reading now stop reading now stop reading now stop reading now stop
- ##
- ## HERE IT BECOMES REALLY SCARY
- ##
- ## stop reading now stop reading now stop reading now stop reading now stop
- ##
- ##############################################################################
-
- sub _ponder_paragraph_buffer {
-
- # Para-token types as found in the buffer.
- # ~Verbatim, ~Para, ~end, =head1..4, =for, =begin, =end,
- # =over, =back, =item
- # and the null =pod (to be complained about if over one line)
- #
- # "~data" paragraphs are something we generate at this level, depending on
- # a currently open =over region
-
- # Events fired: Begin and end for:
- # directivename (like head1 .. head4), item, extend,
- # for (from =begin...=end, =for),
- # over-bullet, over-number, over-text, over-block,
- # item-bullet, item-number, item-text,
- # Document,
- # Data, Para, Verbatim
- # B, C, longdirname (TODO -- wha?), etc. for all directives
- #
-
- my $self = $_[0];
- my $paras;
- return unless @{$paras = $self->{'paras'}};
- my $curr_open = ($self->{'curr_open'} ||= []);
-
- my $scratch;
-
- DEBUG > 10 and print "# Paragraph buffer: <<", pretty($paras), ">>\n";
-
- # We have something in our buffer. So apparently the document has started.
- unless($self->{'doc_has_started'}) {
- $self->{'doc_has_started'} = 1;
-
- my $starting_contentless;
- $starting_contentless =
- (
- !@$curr_open
- and @$paras and ! grep $_->[0] ne '~end', @$paras
- # i.e., if the paras is all ~ends
- )
- ;
- DEBUG and print "# Starting ",
- $starting_contentless ? 'contentless' : 'contentful',
- " document\n"
- ;
-
- $self->_handle_element_start(
- ($scratch = 'Document'),
- {
- 'start_line' => $paras->[0][1]{'start_line'},
- $starting_contentless ? ( 'contentless' => 1 ) : (),
- },
- );
- }
-
- my($para, $para_type);
- while(@$paras) {
- last if @$paras == 1 and
- ( $paras->[0][0] eq '=over' or $paras->[0][0] eq '~Verbatim'
- or $paras->[0][0] eq '=item' )
- ;
- # Those're the three kinds of paragraphs that require lookahead.
- # Actually, an "=item Foo" inside an <over type=text> region
- # and any =item inside an <over type=block> region (rare)
- # don't require any lookahead, but all others (bullets
- # and numbers) do.
-
- # TODO: winge about many kinds of directives in non-resolving =for regions?
- # TODO: many? like what? =head1 etc?
-
- $para = shift @$paras;
- $para_type = $para->[0];
-
- DEBUG > 1 and print "Pondering a $para_type paragraph, given the stack: (",
- $self->_dump_curr_open(), ")\n";
-
- if($para_type eq '=for') {
- next if $self->_ponder_for($para,$curr_open,$paras);
-
- } elsif($para_type eq '=begin') {
- next if $self->_ponder_begin($para,$curr_open,$paras);
-
- } elsif($para_type eq '=end') {
- next if $self->_ponder_end($para,$curr_open,$paras);
-
- } elsif($para_type eq '~end') { # The virtual end-document signal
- next if $self->_ponder_doc_end($para,$curr_open,$paras);
- }
-
-
- # ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
- #~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
- if(grep $_->[1]{'~ignore'}, @$curr_open) {
- DEBUG > 1 and
- print "Skipping $para_type paragraph because in ignore mode.\n";
- next;
- }
- #~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
- # ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
-
- if($para_type eq '=pod') {
- $self->_ponder_pod($para,$curr_open,$paras);
-
- } elsif($para_type eq '=over') {
- next if $self->_ponder_over($para,$curr_open,$paras);
-
- } elsif($para_type eq '=back') {
- next if $self->_ponder_back($para,$curr_open,$paras);
-
- } else {
-
- # All non-magical codes!!!
-
- # Here we start using $para_type for our own twisted purposes, to
- # mean how it should get treated, not as what the element name
- # should be.
-
- DEBUG > 1 and print "Pondering non-magical $para_type\n";
-
- my $i;
-
- # Enforce some =headN discipline
- if($para_type =~ m/^=head\d$/s
- and ! $self->{'accept_heads_anywhere'}
- and @$curr_open
- and $curr_open->[-1][0] eq '=over'
- ) {
- DEBUG > 2 and print "'=$para_type' inside an '=over'!\n";
- $self->whine(
- $para->[1]{'start_line'},
- "You forgot a '=back' before '$para_type'"
- );
- unshift @$paras, ['=back', {}, ''], $para; # close the =over
- next;
- }
-
-
- if($para_type eq '=item') {
-
- my $over;
- unless(@$curr_open and ($over = $curr_open->[-1])->[0] eq '=over') {
- $self->whine(
- $para->[1]{'start_line'},
- "'=item' outside of any '=over'"
- );
- unshift @$paras,
- ['=over', {'start_line' => $para->[1]{'start_line'}}, ''],
- $para
- ;
- next;
- }
-
-
- my $over_type = $over->[1]{'~type'};
-
- if(!$over_type) {
- # Shouldn't happen1
- die "Typeless over in stack, starting at line "
- . $over->[1]{'start_line'};
-
- } elsif($over_type eq 'block') {
- unless($curr_open->[-1][1]{'~bitched_about'}) {
- $curr_open->[-1][1]{'~bitched_about'} = 1;
- $self->whine(
- $curr_open->[-1][1]{'start_line'},
- "You can't have =items (as at line "
- . $para->[1]{'start_line'}
- . ") unless the first thing after the =over is an =item"
- );
- }
- # Just turn it into a paragraph and reconsider it
- $para->[0] = '~Para';
- unshift @$paras, $para;
- next;
-
- } elsif($over_type eq 'text') {
- my $item_type = $self->_get_item_type($para);
- # That kills the content of the item if it's a number or bullet.
- DEBUG and print " Item is of type ", $para->[0], " under $over_type\n";
-
- if($item_type eq 'text') {
- # Nothing special needs doing for 'text'
- } elsif($item_type eq 'number' or $item_type eq 'bullet') {
- die "Unknown item type $item_type"
- unless $item_type eq 'number' or $item_type eq 'bullet';
- # Undo our clobbering:
- push @$para, $para->[1]{'~orig_content'};
- delete $para->[1]{'number'};
- # Only a PROPER item-number element is allowed
- # to have a number attribute.
- } else {
- die "Unhandled item type $item_type"; # should never happen
- }
-
- # =item-text thingies don't need any assimilation, it seems.
-
- } elsif($over_type eq 'number') {
- my $item_type = $self->_get_item_type($para);
- # That kills the content of the item if it's a number or bullet.
- DEBUG and print " Item is of type ", $para->[0], " under $over_type\n";
-
- my $expected_value = ++ $curr_open->[-1][1]{'~counter'};
-
- if($item_type eq 'bullet') {
- # Hm, it's not numeric. Correct for this.
- $para->[1]{'number'} = $expected_value;
- $self->whine(
- $para->[1]{'start_line'},
- "Expected '=item $expected_value'"
- );
- push @$para, $para->[1]{'~orig_content'};
- # restore the bullet, blocking the assimilation of next para
-
- } elsif($item_type eq 'text') {
- # Hm, it's not numeric. Correct for this.
- $para->[1]{'number'} = $expected_value;
- $self->whine(
- $para->[1]{'start_line'},
- "Expected '=item $expected_value'"
- );
- # Text content will still be there and will block next ~Para
-
- } elsif($item_type ne 'number') {
- die "Unknown item type $item_type"; # should never happen
-
- } elsif($expected_value == $para->[1]{'number'}) {
- DEBUG > 1 and print " Numeric item has the expected value of $expected_value\n";
-
- } else {
- DEBUG > 1 and print " Numeric item has ", $para->[1]{'number'},
- " instead of the expected value of $expected_value\n";
- $self->whine(
- $para->[1]{'start_line'},
- "You have '=item " . $para->[1]{'number'} .
- "' instead of the expected '=item $expected_value'"
- );
- $para->[1]{'number'} = $expected_value; # correcting!!
- }
-
- if(@$para == 2) {
- # For the cases where we /didn't/ push to @$para
- if($paras->[0][0] eq '~Para') {
- DEBUG and print "Assimilating following ~Para content into $over_type item\n";
- push @$para, splice @{shift @$paras},2;
- } else {
- DEBUG and print "Can't assimilate following ", $paras->[0][0], "\n";
- push @$para, ''; # Just so it's not contentless
- }
- }
-
-
- } elsif($over_type eq 'bullet') {
- my $item_type = $self->_get_item_type($para);
- # That kills the content of the item if it's a number or bullet.
- DEBUG and print " Item is of type ", $para->[0], " under $over_type\n";
-
- if($item_type eq 'bullet') {
- # as expected!
-
- if( $para->[1]{'~_freaky_para_hack'} ) {
- DEBUG and print "Accomodating '=item * Foo' tolerance hack.\n";
- push @$para, delete $para->[1]{'~_freaky_para_hack'};
- }
-
- } elsif($item_type eq 'number') {
- $self->whine(
- $para->[1]{'start_line'},
- "Expected '=item *'"
- );
- push @$para, $para->[1]{'~orig_content'};
- # and block assimilation of the next paragraph
- delete $para->[1]{'number'};
- # Only a PROPER item-number element is allowed
- # to have a number attribute.
- } elsif($item_type eq 'text') {
- $self->whine(
- $para->[1]{'start_line'},
- "Expected '=item *'"
- );
- # But doesn't need processing. But it'll block assimilation
- # of the next para.
- } else {
- die "Unhandled item type $item_type"; # should never happen
- }
-
- if(@$para == 2) {
- # For the cases where we /didn't/ push to @$para
- if($paras->[0][0] eq '~Para') {
- DEBUG and print "Assimilating following ~Para content into $over_type item\n";
- push @$para, splice @{shift @$paras},2;
- } else {
- DEBUG and print "Can't assimilate following ", $paras->[0][0], "\n";
- push @$para, ''; # Just so it's not contentless
- }
- }
-
- } else {
- die "Unhandled =over type \"$over_type\"?";
- # Shouldn't happen!
- }
-
- $para_type = 'Plain';
- $para->[0] .= '-' . $over_type;
- # Whew. Now fall thru and process it.
-
-
- } elsif($para_type eq '=extend') {
- # Well, might as well implement it here.
- $self->_ponder_extend($para);
- next; # and skip
- } elsif($para_type eq '=encoding') {
- # Not actually acted on here, but we catch errors here.
- $self->_handle_encoding_second_level($para);
-
- next; # and skip
- } elsif($para_type eq '~Verbatim') {
- $para->[0] = 'Verbatim';
- $para_type = '?Verbatim';
- } elsif($para_type eq '~Para') {
- $para->[0] = 'Para';
- $para_type = '?Plain';
- } elsif($para_type eq 'Data') {
- $para->[0] = 'Data';
- $para_type = '?Data';
- } elsif( $para_type =~ s/^=//s
- and defined( $para_type = $self->{'accept_directives'}{$para_type} )
- ) {
- DEBUG > 1 and print " Pondering known directive ${$para}[0] as $para_type\n";
- } else {
- # An unknown directive!
- DEBUG > 1 and printf "Unhandled directive %s (Handled: %s)\n",
- $para->[0], join(' ', sort keys %{$self->{'accept_directives'}} )
- ;
- $self->whine(
- $para->[1]{'start_line'},
- "Unknown directive: $para->[0]"
- );
-
- # And maybe treat it as text instead of just letting it go?
- next;
- }
-
- if($para_type =~ s/^\?//s) {
- if(! @$curr_open) { # usual case
- DEBUG and print "Treating $para_type paragraph as such because stack is empty.\n";
- } else {
- my @fors = grep $_->[0] eq '=for', @$curr_open;
- DEBUG > 1 and print "Containing fors: ",
- join(',', map $_->[1]{'target'}, @fors), "\n";
-
- if(! @fors) {
- DEBUG and print "Treating $para_type paragraph as such because stack has no =for's\n";
-
- #} elsif(grep $_->[1]{'~resolve'}, @fors) {
- #} elsif(not grep !$_->[1]{'~resolve'}, @fors) {
- } elsif( $fors[-1][1]{'~resolve'} ) {
- # Look to the immediately containing for
-
- if($para_type eq 'Data') {
- DEBUG and print "Treating Data paragraph as Plain/Verbatim because the containing =for ($fors[-1][1]{'target'}) is a resolver\n";
- $para->[0] = 'Para';
- $para_type = 'Plain';
- } else {
- DEBUG and print "Treating $para_type paragraph as such because the containing =for ($fors[-1][1]{'target'}) is a resolver\n";
- }
- } else {
- DEBUG and print "Treating $para_type paragraph as Data because the containing =for ($fors[-1][1]{'target'}) is a non-resolver\n";
- $para->[0] = $para_type = 'Data';
- }
- }
- }
-
- #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- if($para_type eq 'Plain') {
- $self->_ponder_Plain($para);
- } elsif($para_type eq 'Verbatim') {
- $self->_ponder_Verbatim($para);
- } elsif($para_type eq 'Data') {
- $self->_ponder_Data($para);
- } else {
- die "\$para type is $para_type -- how did that happen?";
- # Shouldn't happen.
- }
-
- #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- $para->[0] =~ s/^[~=]//s;
-
- DEBUG and print "\n", pretty($para), "\n";
-
- # traverse the treelet (which might well be just one string scalar)
- $self->{'content_seen'} ||= 1;
- $self->_traverse_treelet_bit(@$para);
- }
- }
-
- return;
- }
-
- ###########################################################################
- # The sub-ponderers...
-
-
-
- sub _ponder_for {
- my ($self,$para,$curr_open,$paras) = @_;
-
- # Fake it out as a begin/end
- my $target;
-
- if(grep $_->[1]{'~ignore'}, @$curr_open) {
- DEBUG > 1 and print "Ignoring ignorable =for\n";
- return 1;
- }
-
- for(my $i = 2; $i < @$para; ++$i) {
- if($para->[$i] =~ s/^\s*(\S+)\s*//s) {
- $target = $1;
- last;
- }
- }
- unless(defined $target) {
- $self->whine(
- $para->[1]{'start_line'},
- "=for without a target?"
- );
- return 1;
- }
- DEBUG > 1 and
- print "Faking out a =for $target as a =begin $target / =end $target\n";
-
- $para->[0] = 'Data';
-
- unshift @$paras,
- ['=begin',
- {'start_line' => $para->[1]{'start_line'}, '~really' => '=for'},
- $target,
- ],
- $para,
- ['=end',
- {'start_line' => $para->[1]{'start_line'}, '~really' => '=for'},
- $target,
- ],
- ;
-
- return 1;
- }
-
- sub _ponder_begin {
- my ($self,$para,$curr_open,$paras) = @_;
- my $content = join ' ', splice @$para, 2;
- $content =~ s/^\s+//s;
- $content =~ s/\s+$//s;
- unless(length($content)) {
- $self->whine(
- $para->[1]{'start_line'},
- "=begin without a target?"
- );
- DEBUG and print "Ignoring targetless =begin\n";
- return 1;
- }
-
- unless($content =~ m/^\S+$/s) { # i.e., unless it's one word
- $self->whine(
- $para->[1]{'start_line'},
- "'=begin' only takes one parameter, not several as in '=begin $content'"
- );
- DEBUG and print "Ignoring unintelligible =begin $content\n";
- return 1;
- }
-
-
- $para->[1]{'target'} = $content; # without any ':'
-
- $content =~ s/^:!/!:/s;
- my $neg; # whether this is a negation-match
- $neg = 1 if $content =~ s/^!//s;
- my $to_resolve; # whether to process formatting codes
- $to_resolve = 1 if $content =~ s/^://s;
-
- my $dont_ignore; # whether this target matches us
-
- foreach my $target_name (
- split(',', $content, -1),
- $neg ? () : '*'
- ) {
- DEBUG > 2 and
- print " Considering whether =begin $content matches $target_name\n";
- next unless $self->{'accept_targets'}{$target_name};
-
- DEBUG > 2 and
- print " It DOES match the acceptable target $target_name!\n";
- $to_resolve = 1
- if $self->{'accept_targets'}{$target_name} eq 'force_resolve';
- $dont_ignore = 1;
- $para->[1]{'target_matching'} = $target_name;
- last; # stop looking at other target names
- }
-
- if($neg) {
- if( $dont_ignore ) {
- $dont_ignore = '';
- delete $para->[1]{'target_matching'};
- DEBUG > 2 and print " But the leading ! means that this is a NON-match!\n";
- } else {
- $dont_ignore = 1;
- $para->[1]{'target_matching'} = '!';
- DEBUG > 2 and print " But the leading ! means that this IS a match!\n";
- }
- }
-
- $para->[0] = '=for'; # Just what we happen to call these, internally
- $para->[1]{'~really'} ||= '=begin';
- $para->[1]{'~ignore'} = (! $dont_ignore) || 0;
- $para->[1]{'~resolve'} = $to_resolve || 0;
-
- DEBUG > 1 and print " Making note to ", $dont_ignore ? 'not ' : '',
- "ignore contents of this region\n";
- DEBUG > 1 and $dont_ignore and print " Making note to treat contents as ",
- ($to_resolve ? 'verbatim/plain' : 'data'), " paragraphs\n";
- DEBUG > 1 and print " (Stack now: ", $self->_dump_curr_open(), ")\n";
-
- push @$curr_open, $para;
- if(!$dont_ignore or scalar grep $_->[1]{'~ignore'}, @$curr_open) {
- DEBUG > 1 and print "Ignoring ignorable =begin\n";
- } else {
- $self->{'content_seen'} ||= 1;
- $self->_handle_element_start((my $scratch='for'), $para->[1]);
- }
-
- return 1;
- }
-
- sub _ponder_end {
- my ($self,$para,$curr_open,$paras) = @_;
- my $content = join ' ', splice @$para, 2;
- $content =~ s/^\s+//s;
- $content =~ s/\s+$//s;
- DEBUG and print "Ogling '=end $content' directive\n";
-
- unless(length($content)) {
- $self->whine(
- $para->[1]{'start_line'},
- "'=end' without a target?" . (
- ( @$curr_open and $curr_open->[-1][0] eq '=for' )
- ? ( " (Should be \"=end " . $curr_open->[-1][1]{'target'} . '")' )
- : ''
- )
- );
- DEBUG and print "Ignoring targetless =end\n";
- return 1;
- }
-
- unless($content =~ m/^\S+$/) { # i.e., unless it's one word
- $self->whine(
- $para->[1]{'start_line'},
- "'=end $content' is invalid. (Stack: "
- . $self->_dump_curr_open() . ')'
- );
- DEBUG and print "Ignoring mistargetted =end $content\n";
- return 1;
- }
-
- unless(@$curr_open and $curr_open->[-1][0] eq '=for') {
- $self->whine(
- $para->[1]{'start_line'},
- "=end $content without matching =begin. (Stack: "
- . $self->_dump_curr_open() . ')'
- );
- DEBUG and print "Ignoring mistargetted =end $content\n";
- return 1;
- }
-
- unless($content eq $curr_open->[-1][1]{'target'}) {
- $self->whine(
- $para->[1]{'start_line'},
- "=end $content doesn't match =begin "
- . $curr_open->[-1][1]{'target'}
- . ". (Stack: "
- . $self->_dump_curr_open() . ')'
- );
- DEBUG and print "Ignoring mistargetted =end $content at line $para->[1]{'start_line'}\n";
- return 1;
- }
-
- # Else it's okay to close...
- if(grep $_->[1]{'~ignore'}, @$curr_open) {
- DEBUG > 1 and print "Not firing any event for this =end $content because in an ignored region\n";
- # And that may be because of this to-be-closed =for region, or some
- # other one, but it doesn't matter.
- } else {
- $curr_open->[-1][1]{'start_line'} = $para->[1]{'start_line'};
- # what's that for?
-
- $self->{'content_seen'} ||= 1;
- $self->_handle_element_end( my $scratch = 'for' );
- }
- DEBUG > 1 and print "Popping $curr_open->[-1][0] $curr_open->[-1][1]{'target'} because of =end $content\n";
- pop @$curr_open;
-
- return 1;
- }
-
- sub _ponder_doc_end {
- my ($self,$para,$curr_open,$paras) = @_;
- if(@$curr_open) { # Deal with things left open
- DEBUG and print "Stack is nonempty at end-document: (",
- $self->_dump_curr_open(), ")\n";
-
- DEBUG > 9 and print "Stack: ", pretty($curr_open), "\n";
- unshift @$paras, $self->_closers_for_all_curr_open;
- # Make sure there is exactly one ~end in the parastack, at the end:
- @$paras = grep $_->[0] ne '~end', @$paras;
- push @$paras, $para, $para;
- # We need two -- once for the next cycle where we
- # generate errata, and then another to be at the end
- # when that loop back around to process the errata.
- return 1;
-
- } else {
- DEBUG and print "Okay, stack is empty now.\n";
- }
-
- # Try generating errata section, if applicable
- unless($self->{'~tried_gen_errata'}) {
- $self->{'~tried_gen_errata'} = 1;
- my @extras = $self->_gen_errata();
- if(@extras) {
- unshift @$paras, @extras;
- DEBUG and print "Generated errata... relooping...\n";
- return 1; # I.e., loop around again to process these fake-o paragraphs
- }
- }
-
- splice @$paras; # Well, that's that for this paragraph buffer.
- DEBUG and print "Throwing end-document event.\n";
-
- $self->_handle_element_end( my $scratch = 'Document' );
- return 1; # Hasta la byebye
- }
-
- sub _ponder_pod {
- my ($self,$para,$curr_open,$paras) = @_;
- $self->whine(
- $para->[1]{'start_line'},
- "=pod directives shouldn't be over one line long! Ignoring all "
- . (@$para - 2) . " lines of content"
- ) if @$para > 3;
- # Content is always ignored.
- return;
- }
-
- sub _ponder_over {
- my ($self,$para,$curr_open,$paras) = @_;
- return 1 unless @$paras;
- my $list_type;
-
- if($paras->[0][0] eq '=item') { # most common case
- $list_type = $self->_get_initial_item_type($paras->[0]);
-
- } elsif($paras->[0][0] eq '=back') {
- # Ignore empty lists. TODO: make this an option?
- shift @$paras;
- return 1;
-
- } elsif($paras->[0][0] eq '~end') {
- $self->whine(
- $para->[1]{'start_line'},
- "=over is the last thing in the document?!"
- );
- return 1; # But feh, ignore it.
- } else {
- $list_type = 'block';
- }
- $para->[1]{'~type'} = $list_type;
- push @$curr_open, $para;
- # yes, we reuse the paragraph as a stack item
-
- my $content = join ' ', splice @$para, 2;
- my $overness;
- if($content =~ m/^\s*$/s) {
- $para->[1]{'indent'} = 4;
- } elsif($content =~ m/^\s*((?:\d*\.)?\d+)\s*$/s) {
- no integer;
- $para->[1]{'indent'} = $1;
- if($1 == 0) {
- $self->whine(
- $para->[1]{'start_line'},
- "Can't have a 0 in =over $content"
- );
- $para->[1]{'indent'} = 4;
- }
- } else {
- $self->whine(
- $para->[1]{'start_line'},
- "=over should be: '=over' or '=over positive_number'"
- );
- $para->[1]{'indent'} = 4;
- }
- DEBUG > 1 and print "=over found of type $list_type\n";
-
- $self->{'content_seen'} ||= 1;
- $self->_handle_element_start((my $scratch = 'over-' . $list_type), $para->[1]);
-
- return;
- }
-
- sub _ponder_back {
- my ($self,$para,$curr_open,$paras) = @_;
- # TODO: fire off </item-number> or </item-bullet> or </item-text> ??
-
- my $content = join ' ', splice @$para, 2;
- if($content =~ m/\S/) {
- $self->whine(
- $para->[1]{'start_line'},
- "=back doesn't take any parameters, but you said =back $content"
- );
- }
-
- if(@$curr_open and $curr_open->[-1][0] eq '=over') {
- DEBUG > 1 and print "=back happily closes matching =over\n";
- # Expected case: we're closing the most recently opened thing
- #my $over = pop @$curr_open;
- $self->{'content_seen'} ||= 1;
- $self->_handle_element_end( my $scratch =
- 'over-' . ( (pop @$curr_open)->[1]{'~type'} )
- );
- } else {
- DEBUG > 1 and print "=back found without a matching =over. Stack: (",
- join(', ', map $_->[0], @$curr_open), ").\n";
- $self->whine(
- $para->[1]{'start_line'},
- '=back without =over'
- );
- return 1; # and ignore it
- }
- }
-
- sub _ponder_item {
- my ($self,$para,$curr_open,$paras) = @_;
- my $over;
- unless(@$curr_open and ($over = $curr_open->[-1])->[0] eq '=over') {
- $self->whine(
- $para->[1]{'start_line'},
- "'=item' outside of any '=over'"
- );
- unshift @$paras,
- ['=over', {'start_line' => $para->[1]{'start_line'}}, ''],
- $para
- ;
- return 1;
- }
-
-
- my $over_type = $over->[1]{'~type'};
-
- if(!$over_type) {
- # Shouldn't happen1
- die "Typeless over in stack, starting at line "
- . $over->[1]{'start_line'};
-
- } elsif($over_type eq 'block') {
- unless($curr_open->[-1][1]{'~bitched_about'}) {
- $curr_open->[-1][1]{'~bitched_about'} = 1;
- $self->whine(
- $curr_open->[-1][1]{'start_line'},
- "You can't have =items (as at line "
- . $para->[1]{'start_line'}
- . ") unless the first thing after the =over is an =item"
- );
- }
- # Just turn it into a paragraph and reconsider it
- $para->[0] = '~Para';
- unshift @$paras, $para;
- return 1;
-
- } elsif($over_type eq 'text') {
- my $item_type = $self->_get_item_type($para);
- # That kills the content of the item if it's a number or bullet.
- DEBUG and print " Item is of type ", $para->[0], " under $over_type\n";
-
- if($item_type eq 'text') {
- # Nothing special needs doing for 'text'
- } elsif($item_type eq 'number' or $item_type eq 'bullet') {
- die "Unknown item type $item_type"
- unless $item_type eq 'number' or $item_type eq 'bullet';
- # Undo our clobbering:
- push @$para, $para->[1]{'~orig_content'};
- delete $para->[1]{'number'};
- # Only a PROPER item-number element is allowed
- # to have a number attribute.
- } else {
- die "Unhandled item type $item_type"; # should never happen
- }
-
- # =item-text thingies don't need any assimilation, it seems.
-
- } elsif($over_type eq 'number') {
- my $item_type = $self->_get_item_type($para);
- # That kills the content of the item if it's a number or bullet.
- DEBUG and print " Item is of type ", $para->[0], " under $over_type\n";
-
- my $expected_value = ++ $curr_open->[-1][1]{'~counter'};
-
- if($item_type eq 'bullet') {
- # Hm, it's not numeric. Correct for this.
- $para->[1]{'number'} = $expected_value;
- $self->whine(
- $para->[1]{'start_line'},
- "Expected '=item $expected_value'"
- );
- push @$para, $para->[1]{'~orig_content'};
- # restore the bullet, blocking the assimilation of next para
-
- } elsif($item_type eq 'text') {
- # Hm, it's not numeric. Correct for this.
- $para->[1]{'number'} = $expected_value;
- $self->whine(
- $para->[1]{'start_line'},
- "Expected '=item $expected_value'"
- );
- # Text content will still be there and will block next ~Para
-
- } elsif($item_type ne 'number') {
- die "Unknown item type $item_type"; # should never happen
-
- } elsif($expected_value == $para->[1]{'number'}) {
- DEBUG > 1 and print " Numeric item has the expected value of $expected_value\n";
-
- } else {
- DEBUG > 1 and print " Numeric item has ", $para->[1]{'number'},
- " instead of the expected value of $expected_value\n";
- $self->whine(
- $para->[1]{'start_line'},
- "You have '=item " . $para->[1]{'number'} .
- "' instead of the expected '=item $expected_value'"
- );
- $para->[1]{'number'} = $expected_value; # correcting!!
- }
-
- if(@$para == 2) {
- # For the cases where we /didn't/ push to @$para
- if($paras->[0][0] eq '~Para') {
- DEBUG and print "Assimilating following ~Para content into $over_type item\n";
- push @$para, splice @{shift @$paras},2;
- } else {
- DEBUG and print "Can't assimilate following ", $paras->[0][0], "\n";
- push @$para, ''; # Just so it's not contentless
- }
- }
-
-
- } elsif($over_type eq 'bullet') {
- my $item_type = $self->_get_item_type($para);
- # That kills the content of the item if it's a number or bullet.
- DEBUG and print " Item is of type ", $para->[0], " under $over_type\n";
-
- if($item_type eq 'bullet') {
- # as expected!
-
- if( $para->[1]{'~_freaky_para_hack'} ) {
- DEBUG and print "Accomodating '=item * Foo' tolerance hack.\n";
- push @$para, delete $para->[1]{'~_freaky_para_hack'};
- }
-
- } elsif($item_type eq 'number') {
- $self->whine(
- $para->[1]{'start_line'},
- "Expected '=item *'"
- );
- push @$para, $para->[1]{'~orig_content'};
- # and block assimilation of the next paragraph
- delete $para->[1]{'number'};
- # Only a PROPER item-number element is allowed
- # to have a number attribute.
- } elsif($item_type eq 'text') {
- $self->whine(
- $para->[1]{'start_line'},
- "Expected '=item *'"
- );
- # But doesn't need processing. But it'll block assimilation
- # of the next para.
- } else {
- die "Unhandled item type $item_type"; # should never happen
- }
-
- if(@$para == 2) {
- # For the cases where we /didn't/ push to @$para
- if($paras->[0][0] eq '~Para') {
- DEBUG and print "Assimilating following ~Para content into $over_type item\n";
- push @$para, splice @{shift @$paras},2;
- } else {
- DEBUG and print "Can't assimilate following ", $paras->[0][0], "\n";
- push @$para, ''; # Just so it's not contentless
- }
- }
-
- } else {
- die "Unhandled =over type \"$over_type\"?";
- # Shouldn't happen!
- }
- $para->[0] .= '-' . $over_type;
-
- return;
- }
-
- sub _ponder_Plain {
- my ($self,$para) = @_;
- DEBUG and print " giving plain treatment...\n";
- unless( @$para == 2 or ( @$para == 3 and $para->[2] eq '' )
- or $para->[1]{'~cooked'}
- ) {
- push @$para,
- @{$self->_make_treelet(
- join("\n", splice(@$para, 2)),
- $para->[1]{'start_line'}
- )};
- }
- # Empty paragraphs don't need a treelet for any reason I can see.
- # And precooked paragraphs already have a treelet.
- return;
- }
-
- sub _ponder_Verbatim {
- my ($self,$para) = @_;
- DEBUG and print " giving verbatim treatment...\n";
-
- $para->[1]{'xml:space'} = 'preserve';
- for(my $i = 2; $i < @$para; $i++) {
- foreach my $line ($para->[$i]) { # just for aliasing
- while( $line =~
- # Sort of adapted from Text::Tabs -- yes, it's hardwired in that
- # tabs are at every EIGHTH column. For portability, it has to be
- # one setting everywhere, and 8th wins.
- s/^([^\t]*)(\t+)/$1.(" " x ((length($2)<<3)-(length($1)&7)))/e
- ) {}
-
- # TODO: whinge about (or otherwise treat) unindented or overlong lines
-
- }
- }
-
- # Now the VerbatimFormatted hoodoo...
- if( $self->{'accept_codes'} and
- $self->{'accept_codes'}{'VerbatimFormatted'}
- ) {
- while(@$para > 3 and $para->[-1] !~ m/\S/) { pop @$para }
- # Kill any number of terminal newlines
- $self->_verbatim_format($para);
- } elsif ($self->{'codes_in_verbatim'}) {
- push @$para,
- @{$self->_make_treelet(
- join("\n", splice(@$para, 2)),
- $para->[1]{'start_line'}, $para->[1]{'xml:space'}
- )};
- $para->[-1] =~ s/\n+$//s; # Kill any number of terminal newlines
- } else {
- push @$para, join "\n", splice(@$para, 2) if @$para > 3;
- $para->[-1] =~ s/\n+$//s; # Kill any number of terminal newlines
- }
- return;
- }
-
- sub _ponder_Data {
- my ($self,$para) = @_;
- DEBUG and print " giving data treatment...\n";
- $para->[1]{'xml:space'} = 'preserve';
- push @$para, join "\n", splice(@$para, 2) if @$para > 3;
- return;
- }
-
-
-
-
- ###########################################################################
-
- sub _traverse_treelet_bit { # for use only by the routine above
- my($self, $name) = splice @_,0,2;
-
- my $scratch;
- $self->_handle_element_start(($scratch=$name), shift @_);
-
- foreach my $x (@_) {
- if(ref($x)) {
- &_traverse_treelet_bit($self, @$x);
- } else {
- $self->_handle_text($x);
- }
- }
-
- $self->_handle_element_end($scratch=$name);
- return;
- }
-
- #@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
-
- sub _closers_for_all_curr_open {
- my $self = $_[0];
- my @closers;
- foreach my $still_open (@{ $self->{'curr_open'} || return }) {
- my @copy = @$still_open;
- $copy[1] = {%{ $copy[1] }};
- #$copy[1]{'start_line'} = -1;
- if($copy[0] eq '=for') {
- $copy[0] = '=end';
- } elsif($copy[0] eq '=over') {
- $copy[0] = '=back';
- } else {
- die "I don't know how to auto-close an open $copy[0] region";
- }
-
- unless( @copy > 2 ) {
- push @copy, $copy[1]{'target'};
- $copy[-1] = '' unless defined $copy[-1];
- # since =over's don't have targets
- }
-
- DEBUG and print "Queuing up fake-o event: ", pretty(\@copy), "\n";
- unshift @closers, \@copy;
- }
- return @closers;
- }
-
- #--------------------------------------------------------------------------
-
- sub _verbatim_format {
- my($it, $p) = @_;
-
- my $formatting;
-
- for(my $i = 2; $i < @$p; $i++) { # work backwards over the lines
- DEBUG and print "_verbatim_format appends a newline to $i: $p->[$i]\n";
- $p->[$i] .= "\n";
- # Unlike with simple Verbatim blocks, we don't end up just doing
- # a join("\n", ...) on the contents, so we have to append a
- # newline to ever line, and then nix the last one later.
- }
-
- if( DEBUG > 4 ) {
- print "<<\n";
- for(my $i = $#$p; $i >= 2; $i--) { # work backwards over the lines
- print "_verbatim_format $i: $p->[$i]";
- }
- print ">>\n";
- }
-
- for(my $i = $#$p; $i > 2; $i--) {
- # work backwards over the lines, except the first (#2)
-
- #next unless $p->[$i] =~ m{^#:([ \^\/\%]*)\n?$}s
- # and $p->[$i-1] !~ m{^#:[ \^\/\%]*\n?$}s;
- # look at a formatty line preceding a nonformatty one
- DEBUG > 5 and print "Scrutinizing line $i: $$p[$i]\n";
- if($p->[$i] =~ m{^#:([ \^\/\%]*)\n?$}s) {
- DEBUG > 5 and print " It's a formatty line. ",
- "Peeking at previous line ", $i-1, ": $$p[$i-1]: \n";
-
- if( $p->[$i-1] =~ m{^#:[ \^\/\%]*\n?$}s ) {
- DEBUG > 5 and print " Previous line is formatty! Skipping this one.\n";
- next;
- } else {
- DEBUG > 5 and print " Previous line is non-formatty! Yay!\n";
- }
- } else {
- DEBUG > 5 and print " It's not a formatty line. Ignoring\n";
- next;
- }
-
- # A formatty line has to have #: in the first two columns, and uses
- # "^" to mean bold, "/" to mean underline, and "%" to mean bold italic.
- # Example:
- # What do you want? i like pie. [or whatever]
- # #:^^^^^^^^^^^^^^^^^ /////////////
-
-
- DEBUG > 4 and print "_verbatim_format considers:\n<$p->[$i-1]>\n<$p->[$i]>\n";
-
- $formatting = ' ' . $1;
- $formatting =~ s/\s+$//s; # nix trailing whitespace
- unless(length $formatting and $p->[$i-1] =~ m/\S/) { # no-op
- splice @$p,$i,1; # remove this line
- $i--; # don't consider next line
- next;
- }
-
- if( length($formatting) >= length($p->[$i-1]) ) {
- $formatting = substr($formatting, 0, length($p->[$i-1]) - 1) . ' ';
- } else {
- $formatting .= ' ' x (length($p->[$i-1]) - length($formatting));
- }
- # Make $formatting and the previous line be exactly the same length,
- # with $formatting having a " " as the last character.
-
- DEBUG > 4 and print "Formatting <$formatting> on <", $p->[$i-1], ">\n";
-
-
- my @new_line;
- while( $formatting =~ m{\G(( +)|(\^+)|(\/+)|(\%+))}g ) {
- #print "Format matches $1\n";
-
- if($2) {
- #print "SKIPPING <$2>\n";
- push @new_line,
- substr($p->[$i-1], pos($formatting)-length($1), length($1));
- } else {
- #print "SNARING $+\n";
- push @new_line, [
- (
- $3 ? 'VerbatimB' :
- $4 ? 'VerbatimI' :
- $5 ? 'VerbatimBI' : die("Should never get called")
- ), {},
- substr($p->[$i-1], pos($formatting)-length($1), length($1))
- ];
- #print "Formatting <$new_line[-1][-1]> as $new_line[-1][0]\n";
- }
- }
- my @nixed =
- splice @$p, $i-1, 2, @new_line; # replace myself and the next line
- DEBUG > 10 and print "Nixed count: ", scalar(@nixed), "\n";
-
- DEBUG > 6 and print "New version of the above line is these tokens (",
- scalar(@new_line), "):",
- map( ref($_)?"<@$_> ":"<$_>", @new_line ), "\n";
- $i--; # So the next line we scrutinize is the line before the one
- # that we just went and formatted
- }
-
- $p->[0] = 'VerbatimFormatted';
-
- # Collapse adjacent text nodes, just for kicks.
- for( my $i = 2; $i > $#$p; $i++ ) { # work forwards over the tokens except for the last
- if( !ref($p->[$i]) and !ref($p->[$i + 1]) ) {
- DEBUG > 5 and print "_verbatim_format merges {$p->[$i]} and {$p->[$i+1]}\n";
- $p->[$i] .= splice @$p, $i+1, 1; # merge
- --$i; # and back up
- }
- }
-
- # Now look for the last text token, and remove the terminal newline
- for( my $i = $#$p; $i >= 2; $i-- ) {
- # work backwards over the tokens, even the first
- if( !ref($p->[$i]) ) {
- if($p->[$i] =~ s/\n$//s) {
- DEBUG > 5 and print "_verbatim_format killed the terminal newline on #$i: {$p->[$i]}, after {$p->[$i-1]}\n";
- } else {
- DEBUG > 5 and print
- "No terminal newline on #$i: {$p->[$i]}, after {$p->[$i-1]} !?\n";
- }
- last; # we only want the next one
- }
- }
-
- return;
- }
-
-
- #@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
-
-
- sub _treelet_from_formatting_codes {
- # Given a paragraph, returns a treelet. Full of scary tokenizing code.
- # Like [ '~Top', {'start_line' => $start_line},
- # "I like ",
- # [ 'B', {}, "pie" ],
- # "!"
- # ]
-
- my($self, $para, $start_line, $preserve_space) = @_;
-
- my $treelet = ['~Top', {'start_line' => $start_line},];
-
- unless ($preserve_space || $self->{'preserve_whitespace'}) {
- $para =~ s/\. /\.\xA0 /g if $self->{'fullstop_space_harden'};
-
- $para =~ s/\s+/ /g; # collapse and trim all whitespace first.
- $para =~ s/ $//;
- $para =~ s/^ //;
- }
-
- # Only apparent problem the above code is that N<< >> turns into
- # N<< >>. But then, word wrapping does that too! So don't do that!
-
- my @stack;
- my @lineage = ($treelet);
-
- DEBUG > 4 and print "Paragraph:\n$para\n\n";
-
- # Here begins our frightening tokenizer RE. The following regex matches
- # text in four main parts:
- #
- # * Start-codes. The first alternative matches C< or C<<, the latter
- # followed by some whitespace. $1 will hold the entire start code
- # (including any space following a multiple-angle-bracket delimiter),
- # and $2 will hold only the additional brackets past the first in a
- # multiple-bracket delimiter. length($2) + 1 will be the number of
- # closing brackets we have to find.
- #
- # * Closing brackets. Match some amount of whitespace followed by
- # multiple close brackets. The logic to see if this closes anything
- # is down below. Note that in order to parse C<< >> correctly, we
- # have to use look-behind (?<=\s\s), since the match of the starting
- # code will have consumed the whitespace.
- #
- # * A single closing bracket, to close a simple code like C<>.
- #
- # * Something that isn't a start or end code. We have to be careful
- # about accepting whitespace, since perlpodspec says that any whitespace
- # before a multiple-bracket closing delimiter should be ignored.
- #
- while($para =~
- m/\G
- (?:
- # Match starting codes, including the whitespace following a
- # multiple-delimiter start code. $1 gets the whole start code and
- # $2 gets all but one of the <s in the multiple-bracket case.
- ([A-Z]<(?:(<+)\s+)?)
- |
- # Match multiple-bracket end codes. $3 gets the whitespace that
- # should be discarded before an end bracket but kept in other cases
- # and $4 gets the end brackets themselves.
- (\s+|(?<=\s\s))(>{2,})
- |
- (\s?>) # $5: simple end-codes
- |
- ( # $6: stuff containing no start-codes or end-codes
- (?:
- [^A-Z\s>]
- |
- (?:
- [A-Z](?!<)
- )
- |
- (?:
- \s(?!\s*>)
- )
- )+
- )
- )
- /xgo
- ) {
- DEBUG > 4 and print "\nParagraphic tokenstack = (@stack)\n";
- if(defined $1) {
- if(defined $2) {
- DEBUG > 3 and print "Found complex start-text code \"$1\"\n";
- push @stack, length($2) + 1;
- # length of the necessary complex end-code string
- } else {
- DEBUG > 3 and print "Found simple start-text code \"$1\"\n";
- push @stack, 0; # signal that we're looking for simple
- }
- push @lineage, [ substr($1,0,1), {}, ]; # new node object
- push @{ $lineage[-2] }, $lineage[-1];
-
- } elsif(defined $4) {
- DEBUG > 3 and print "Found apparent complex end-text code \"$3$4\"\n";
- # This is where it gets messy...
- if(! @stack) {
- # We saw " >>>>" but needed nothing. This is ALL just stuff then.
- DEBUG > 4 and print " But it's really just stuff.\n";
- push @{ $lineage[-1] }, $3, $4;
- next;
- } elsif(!$stack[-1]) {
- # We saw " >>>>" but needed only ">". Back pos up.
- DEBUG > 4 and print " And that's more than we needed to close simple.\n";
- push @{ $lineage[-1] }, $3; # That was a for-real space, too.
- pos($para) = pos($para) - length($4) + 1;
- } elsif($stack[-1] == length($4)) {
- # We found " >>>>", and it was exactly what we needed. Commonest case.
- DEBUG > 4 and print " And that's exactly what we needed to close complex.\n";
- } elsif($stack[-1] < length($4)) {
- # We saw " >>>>" but needed only " >>". Back pos up.
- DEBUG > 4 and print " And that's more than we needed to close complex.\n";
- pos($para) = pos($para) - length($4) + $stack[-1];
- } else {
- # We saw " >>>>" but needed " >>>>>>". So this is all just stuff!
- DEBUG > 4 and print " But it's really just stuff, because we needed more.\n";
- push @{ $lineage[-1] }, $3, $4;
- next;
- }
- #print "\nHOOBOY ", scalar(@{$lineage[-1]}), "!!!\n";
-
- push @{ $lineage[-1] }, '' if 2 == @{ $lineage[-1] };
- # Keep the element from being childless
-
- pop @stack;
- pop @lineage;
-
- } elsif(defined $5) {
- DEBUG > 3 and print "Found apparent simple end-text code \"$4\"\n";
-
- if(@stack and ! $stack[-1]) {
- # We're indeed expecting a simple end-code
- DEBUG > 4 and print " It's indeed an end-code.\n";
-
- if(length($5) == 2) { # There was a space there: " >"
- push @{ $lineage[-1] }, ' ';
- } elsif( 2 == @{ $lineage[-1] } ) { # Closing a childless element
- push @{ $lineage[-1] }, ''; # keep it from being really childless
- }
-
- pop @stack;
- pop @lineage;
- } else {
- DEBUG > 4 and print " It's just stuff.\n";
- push @{ $lineage[-1] }, $5;
- }
-
- } elsif(defined $6) {
- DEBUG > 3 and print "Found stuff \"$6\"\n";
- push @{ $lineage[-1] }, $6;
-
- } else {
- # should never ever ever ever happen
- DEBUG and print "AYYAYAAAAA at line ", __LINE__, "\n";
- die "SPORK 512512!";
- }
- }
-
- if(@stack) { # Uhoh, some sequences weren't closed.
- my $x= "...";
- while(@stack) {
- push @{ $lineage[-1] }, '' if 2 == @{ $lineage[-1] };
- # Hmmmmm!
-
- my $code = (pop @lineage)->[0];
- my $ender_length = pop @stack;
- if($ender_length) {
- --$ender_length;
- $x = $code . ("<" x $ender_length) . " $x " . (">" x $ender_length);
- } else {
- $x = $code . "<$x>";
- }
- }
- DEBUG > 1 and print "Unterminated $x sequence\n";
- $self->whine($start_line,
- "Unterminated $x sequence",
- );
- }
-
- return $treelet;
- }
-
- #@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
-
- sub text_content_of_treelet { # method: $parser->text_content_of_treelet($lol)
- return stringify_lol($_[1]);
- }
-
- sub stringify_lol { # function: stringify_lol($lol)
- my $string_form = '';
- _stringify_lol( $_[0] => \$string_form );
- return $string_form;
- }
-
- sub _stringify_lol { # the real recursor
- my($lol, $to) = @_;
- use UNIVERSAL ();
- for(my $i = 2; $i < @$lol; ++$i) {
- if( ref($lol->[$i] || '') and UNIVERSAL::isa($lol->[$i], 'ARRAY') ) {
- _stringify_lol( $lol->[$i], $to); # recurse!
- } else {
- $$to .= $lol->[$i];
- }
- }
- return;
- }
-
- #@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
-
- sub _dump_curr_open { # return a string representation of the stack
- my $curr_open = $_[0]{'curr_open'};
-
- return '[empty]' unless @$curr_open;
- return join '; ',
- map {;
- ($_->[0] eq '=for')
- ? ( ($_->[1]{'~really'} || '=over')
- . ' ' . $_->[1]{'target'})
- : $_->[0]
- }
- @$curr_open
- ;
- }
-
- ###########################################################################
- my %pretty_form = (
- "\a" => '\a', # ding!
- "\b" => '\b', # BS
- "\e" => '\e', # ESC
- "\f" => '\f', # FF
- "\t" => '\t', # tab
- "\cm" => '\cm',
- "\cj" => '\cj',
- "\n" => '\n', # probably overrides one of either \cm or \cj
- '"' => '\"',
- '\\' => '\\\\',
- '$' => '\\$',
- '@' => '\\@',
- '%' => '\\%',
- '#' => '\\#',
- );
-
- sub pretty { # adopted from Class::Classless
- # Not the most brilliant routine, but passable.
- # Don't give it a cyclic data structure!
- my @stuff = @_; # copy
- my $x;
- my $out =
- # join ",\n" .
- join ", ",
- map {;
- if(!defined($_)) {
- "undef";
- } elsif(ref($_) eq 'ARRAY' or ref($_) eq 'Pod::Simple::LinkSection') {
- $x = "[ " . pretty(@$_) . " ]" ;
- $x;
- } elsif(ref($_) eq 'SCALAR') {
- $x = "\\" . pretty($$_) ;
- $x;
- } elsif(ref($_) eq 'HASH') {
- my $hr = $_;
- $x = "{" . join(", ",
- map(pretty($_) . '=>' . pretty($hr->{$_}),
- sort keys %$hr ) ) . "}" ;
- $x;
- } elsif(!length($_)) { q{''} # empty string
- } elsif(
- $_ eq '0' # very common case
- or(
- m/^-?(?:[123456789]\d*|0)(?:\.\d+)?$/s
- and $_ ne '-0' # the strange case that that RE lets thru
- )
- ) { $_;
- } else {
- if( chr(65) eq 'A' ) {
- s<([^\x20\x21\x23\x27-\x3F\x41-\x5B\x5D-\x7E])>
- #<$pretty_form{$1} || '\\x'.(unpack("H2",$1))>eg;
- <$pretty_form{$1} || '\\x{'.sprintf("%x", ord($1)).'}'>eg;
- } else {
- # We're in some crazy non-ASCII world!
- s<([^abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789])>
- #<$pretty_form{$1} || '\\x'.(unpack("H2",$1))>eg;
- <$pretty_form{$1} || '\\x{'.sprintf("%x", ord($1)).'}'>eg;
- }
- qq{"$_"};
- }
- } @stuff;
- # $out =~ s/\n */ /g if length($out) < 75;
- return $out;
- }
-
- #@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
-
- # A rather unsubtle method of blowing away all the state information
- # from a parser object so it can be reused. Provided as a utility for
- # backward compatibilty in Pod::Man, etc. but not recommended for
- # general use.
-
- sub reinit {
- my $self = shift;
- foreach (qw(source_dead source_filename doc_has_started
- start_of_pod_block content_seen last_was_blank paras curr_open
- line_count pod_para_count in_pod ~tried_gen_errata errata errors_seen
- Title)) {
-
- delete $self->{$_};
- }
- }
-
- #@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
- 1;
-
-