MINI Sh3ll
require 5;
package Pod::Simple;
use strict;
use Carp ();
BEGIN { *DEBUG = sub () {0} unless defined &DEBUG }
use integer;
use Pod::Escapes 1.04 ();
use Pod::Simple::LinkSection ();
use Pod::Simple::BlackBox ();
#use utf8;
use vars qw(
$VERSION @ISA
@Known_formatting_codes @Known_directives
%Known_formatting_codes %Known_directives
$NL
);
@ISA = ('Pod::Simple::BlackBox');
$VERSION = '3.42';
@Known_formatting_codes = qw(I B C L E F S X Z);
%Known_formatting_codes = map(($_=>1), @Known_formatting_codes);
@Known_directives = qw(head1 head2 head3 head4 head5 head6 item over back);
%Known_directives = map(($_=>'Plain'), @Known_directives);
$NL = $/ unless defined $NL;
#-----------------------------------------------------------------------------
# Set up some constants:
BEGIN {
if(defined &ASCII) { }
elsif(chr(65) eq 'A') { *ASCII = sub () {1} }
else { *ASCII = sub () {''} }
unless(defined &MANY_LINES) { *MANY_LINES = sub () {20} }
DEBUG > 4 and print STDERR "MANY_LINES is ", MANY_LINES(), "\n";
unless(MANY_LINES() >= 1) {
die "MANY_LINES is too small (", MANY_LINES(), ")!\nAborting";
}
if(defined &UNICODE) { }
elsif($] >= 5.008) { *UNICODE = sub() {1} }
else { *UNICODE = sub() {''} }
}
if(DEBUG > 2) {
print STDERR "# We are ", ASCII ? '' : 'not ', "in ASCII-land\n";
print STDERR "# We are under a Unicode-safe Perl.\n";
}
# The NO BREAK SPACE and SOFT HYHPEN are used in several submodules.
if ($] ge 5.007_003) { # On sufficiently modern Perls we can handle any
# character set
$Pod::Simple::nbsp = chr utf8::unicode_to_native(0xA0);
$Pod::Simple::shy = chr utf8::unicode_to_native(0xAD);
}
elsif (Pod::Simple::ASCII) { # Hard code ASCII early Perl
$Pod::Simple::nbsp = "\xA0";
$Pod::Simple::shy = "\xAD";
}
else { # EBCDIC on early Perl. We know what the values are for the code
# pages supported then.
$Pod::Simple::nbsp = "\x41";
$Pod::Simple::shy = "\xCA";
}
# Design note:
# This is a parser for Pod. It is not a parser for the set of Pod-like
# languages which happens to contain Pod -- it is just for Pod, plus possibly
# some extensions.
# @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
#@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
__PACKAGE__->_accessorize(
'_output_is_for_JustPod', # For use only by Pod::Simple::JustPod,
# If non-zero, don't expand Z<> E<> S<> L<>,
# and count how many brackets in format codes
'nbsp_for_S', # Whether to map S<...>'s to \xA0 characters
'source_filename', # Filename of the source, for use in warnings
'source_dead', # Whether to consider this parser's source dead
'output_fh', # The filehandle we're writing to, if applicable.
# Used only in some derived classes.
'hide_line_numbers', # For some dumping subclasses: whether to pointedly
# suppress the start_line attribute
'line_count', # the current line number
'pod_para_count', # count of pod paragraphs seen so far
'no_whining', # whether to suppress whining
'no_errata_section', # whether to suppress the errata section
'complain_stderr', # whether to complain to stderr
'doc_has_started', # whether we've fired the open-Document event yet
'bare_output', # For some subclasses: whether to prepend
# header-code and postpend footer-code
'keep_encoding_directive', # whether to emit =encoding
'nix_X_codes', # whether to ignore X<...> codes
'merge_text', # whether to avoid breaking a single piece of
# text up into several events
'preserve_whitespace', # whether to try to keep whitespace as-is
'strip_verbatim_indent', # What indent to strip from verbatim
'expand_verbatim_tabs', # 0: preserve tabs in verbatim blocks
# n: expand tabs to stops every n columns
'parse_characters', # Whether parser should expect chars rather than octets
'content_seen', # whether we've seen any real Pod content
'errors_seen', # TODO: document. whether we've seen any errors (fatal or not)
'codes_in_verbatim', # for PseudoPod extensions
'code_handler', # coderef to call when a code (non-pod) line is seen
'cut_handler', # ... when a =cut line is seen
'pod_handler', # ... when a =pod line is seen
'whiteline_handler', # ... when a line with only whitespace is seen
#Called like:
# $code_handler->($line, $self->{'line_count'}, $self) if $code_handler;
# $cut_handler->($line, $self->{'line_count'}, $self) if $cut_handler;
# $pod_handler->($line, $self->{'line_count'}, $self) if $pod_handler;
# $wl_handler->($line, $self->{'line_count'}, $self) if $wl_handler;
'parse_empty_lists', # whether to acknowledge empty =over/=back blocks
'raw_mode', # to report entire raw lines instead of Pod elements
);
#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
sub any_errata_seen { # good for using as an exit() value...
return shift->{'errors_seen'} || 0;
}
sub errata_seen {
return shift->{'all_errata'} || {};
}
# Returns the encoding only if it was recognized as being handled and set
sub detected_encoding {
return shift->{'detected_encoding'};
}
sub encoding {
my $this = shift;
return $this->{'encoding'} unless @_; # GET.
$this->_handle_encoding_line("=encoding $_[0]");
if ($this->{'_processed_encoding'}) {
delete $this->{'_processed_encoding'};
if(! $this->{'encoding_command_statuses'} ) {
DEBUG > 2 and print STDERR " CRAZY ERROR: encoding wasn't really handled?!\n";
} elsif( $this->{'encoding_command_statuses'}[-1] ) {
$this->scream( "=encoding $_[0]",
sprintf "Couldn't do %s: %s",
$this->{'encoding_command_reqs' }[-1],
$this->{'encoding_command_statuses'}[-1],
);
} else {
DEBUG > 2 and print STDERR " (encoding successfully handled.)\n";
}
return $this->{'encoding'};
} else {
return undef;
}
}
#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
# Pull in some functions that, for some reason, I expect to see here too:
BEGIN {
*pretty = \&Pod::Simple::BlackBox::pretty;
*stringify_lol = \&Pod::Simple::BlackBox::stringify_lol;
*my_qr = \&Pod::Simple::BlackBox::my_qr;
}
#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
sub version_report {
my $class = ref($_[0]) || $_[0];
if($class eq __PACKAGE__) {
return "$class $VERSION";
} else {
my $v = $class->VERSION;
return "$class $v (" . __PACKAGE__ . " $VERSION)";
}
}
#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
#sub curr_open { # read-only list accessor
# return @{ $_[0]{'curr_open'} || return() };
#}
#sub _curr_open_listref { $_[0]{'curr_open'} ||= [] }
sub output_string {
# Works by faking out output_fh. Simplifies our code.
#
my $this = shift;
return $this->{'output_string'} unless @_; # GET.
require Pod::Simple::TiedOutFH;
my $x = (defined($_[0]) and ref($_[0])) ? $_[0] : \( $_[0] );
$$x = '' unless defined $$x;
DEBUG > 4 and print STDERR "# Output string set to $x ($$x)\n";
$this->{'output_fh'} = Pod::Simple::TiedOutFH->handle_on($_[0]);
return
$this->{'output_string'} = $_[0];
#${ ${ $this->{'output_fh'} } };
}
sub abandon_output_string { $_[0]->abandon_output_fh; delete $_[0]{'output_string'} }
sub abandon_output_fh { $_[0]->output_fh(undef) }
# These don't delete the string or close the FH -- they just delete our
# references to it/them.
# TODO: document these
#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
sub new {
# takes no parameters
my $class = ref($_[0]) || $_[0];
#Carp::croak(__PACKAGE__ . " is a virtual base class -- see perldoc "
# . __PACKAGE__ );
my $obj = bless {
'accept_codes' => { map( ($_=>$_), @Known_formatting_codes ) },
'accept_directives' => { %Known_directives },
'accept_targets' => {},
}, $class;
$obj->expand_verbatim_tabs(8);
return $obj;
}
# TODO: an option for whether to interpolate E<...>'s, or just resolve to codes.
#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
sub _handle_element_start { # OVERRIDE IN DERIVED CLASS
my($self, $element_name, $attr_hash_r) = @_;
return;
}
sub _handle_element_end { # OVERRIDE IN DERIVED CLASS
my($self, $element_name) = @_;
return;
}
sub _handle_text { # OVERRIDE IN DERIVED CLASS
my($self, $text) = @_;
return;
}
#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
#
# And now directives (not targets)
sub accept_directive_as_verbatim { shift->_accept_directives('Verbatim', @_) }
sub accept_directive_as_data { shift->_accept_directives('Data', @_) }
sub accept_directive_as_processed { shift->_accept_directives('Plain', @_) }
sub _accept_directives {
my($this, $type) = splice @_,0,2;
foreach my $d (@_) {
next unless defined $d and length $d;
Carp::croak "\"$d\" isn't a valid directive name"
unless $d =~ m/^[a-zA-Z][a-zA-Z0-9]*$/s;
Carp::croak "\"$d\" is already a reserved Pod directive name"
if exists $Known_directives{$d};
$this->{'accept_directives'}{$d} = $type;
DEBUG > 2 and print STDERR "Learning to accept \"=$d\" as directive of type $type\n";
}
DEBUG > 6 and print STDERR "$this\'s accept_directives : ",
pretty($this->{'accept_directives'}), "\n";
return sort keys %{ $this->{'accept_directives'} } if wantarray;
return;
}
#--------------------------------------------------------------------------
# TODO: document these:
sub unaccept_directive { shift->unaccept_directives(@_) };
sub unaccept_directives {
my $this = shift;
foreach my $d (@_) {
next unless defined $d and length $d;
Carp::croak "\"$d\" isn't a valid directive name"
unless $d =~ m/^[a-zA-Z][a-zA-Z0-9]*$/s;
Carp::croak "But you must accept \"$d\" directives -- it's a builtin!"
if exists $Known_directives{$d};
delete $this->{'accept_directives'}{$d};
DEBUG > 2 and print STDERR "OK, won't accept \"=$d\" as directive.\n";
}
return sort keys %{ $this->{'accept_directives'} } if wantarray;
return
}
#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
#
# And now targets (not directives)
sub accept_target { shift->accept_targets(@_) } # alias
sub accept_target_as_text { shift->accept_targets_as_text(@_) } # alias
sub accept_targets { shift->_accept_targets('1', @_) }
sub accept_targets_as_text { shift->_accept_targets('force_resolve', @_) }
# forces them to be processed, even when there's no ":".
sub _accept_targets {
my($this, $type) = splice @_,0,2;
foreach my $t (@_) {
next unless defined $t and length $t;
# TODO: enforce some limitations on what a target name can be?
$this->{'accept_targets'}{$t} = $type;
DEBUG > 2 and print STDERR "Learning to accept \"$t\" as target of type $type\n";
}
return sort keys %{ $this->{'accept_targets'} } if wantarray;
return;
}
#--------------------------------------------------------------------------
sub unaccept_target { shift->unaccept_targets(@_) }
sub unaccept_targets {
my $this = shift;
foreach my $t (@_) {
next unless defined $t and length $t;
# TODO: enforce some limitations on what a target name can be?
delete $this->{'accept_targets'}{$t};
DEBUG > 2 and print STDERR "OK, won't accept \"$t\" as target.\n";
}
return sort keys %{ $this->{'accept_targets'} } if wantarray;
return;
}
#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
#
# And now codes (not targets or directives)
# XXX Probably it is an error that the digit '9' is excluded from these re's.
# Broken for early Perls on EBCDIC
my $xml_name_re = my_qr('[^-.0-8:A-Z_a-z[:^ascii:]]', '9');
$xml_name_re = qr/[\x00-\x2C\x2F\x39\x3B-\x40\x5B-\x5E\x60\x7B-\x7F]/
unless $xml_name_re;
sub accept_code { shift->accept_codes(@_) } # alias
sub accept_codes { # Add some codes
my $this = shift;
foreach my $new_code (@_) {
next unless defined $new_code and length $new_code;
# A good-enough check that it's good as an XML Name symbol:
Carp::croak "\"$new_code\" isn't a valid element name"
if $new_code =~ $xml_name_re
# Characters under 0x80 that aren't legal in an XML Name.
or $new_code =~ m/^[-\.0-9]/s
or $new_code =~ m/:[-\.0-9]/s;
# The legal under-0x80 Name characters that
# an XML Name still can't start with.
$this->{'accept_codes'}{$new_code} = $new_code;
# Yes, map to itself -- just so that when we
# see "=extend W [whatever] thatelementname", we say that W maps
# to whatever $this->{accept_codes}{thatelementname} is,
# i.e., "thatelementname". Then when we go re-mapping,
# a "W" in the treelet turns into "thatelementname". We only
# remap once.
# If we say we accept "W", then a "W" in the treelet simply turns
# into "W".
}
return;
}
#--------------------------------------------------------------------------
sub unaccept_code { shift->unaccept_codes(@_) }
sub unaccept_codes { # remove some codes
my $this = shift;
foreach my $new_code (@_) {
next unless defined $new_code and length $new_code;
# A good-enough check that it's good as an XML Name symbol:
Carp::croak "\"$new_code\" isn't a valid element name"
if $new_code =~ $xml_name_re
# Characters under 0x80 that aren't legal in an XML Name.
or $new_code =~ m/^[-\.0-9]/s
or $new_code =~ m/:[-\.0-9]/s;
# The legal under-0x80 Name characters that
# an XML Name still can't start with.
Carp::croak "But you must accept \"$new_code\" codes -- it's a builtin!"
if grep $new_code eq $_, @Known_formatting_codes;
delete $this->{'accept_codes'}{$new_code};
DEBUG > 2 and print STDERR "OK, won't accept the code $new_code<...>.\n";
}
return;
}
#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
sub parse_string_document {
my $self = shift;
my @lines;
foreach my $line_group (@_) {
next unless defined $line_group and length $line_group;
pos($line_group) = 0;
while($line_group =~
m/([^\n\r]*)(\r?\n?)/g # supports \r, \n ,\r\n
#m/([^\n\r]*)((?:\r?\n)?)/g
) {
#print(">> $1\n"),
$self->parse_lines($1)
if length($1) or length($2)
or pos($line_group) != length($line_group);
# I.e., unless it's a zero-length "empty line" at the very
# end of "foo\nbar\n" (i.e., between the \n and the EOS).
}
}
$self->parse_lines(undef); # to signal EOF
return $self;
}
sub _init_fh_source {
my($self, $source) = @_;
#DEBUG > 1 and print STDERR "Declaring $source as :raw for starters\n";
#$self->_apply_binmode($source, ':raw');
#binmode($source, ":raw");
return;
}
#:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.
#
sub parse_file {
my($self, $source) = (@_);
if(!defined $source) {
Carp::croak("Can't use empty-string as a source for parse_file");
} elsif(ref(\$source) eq 'GLOB') {
$self->{'source_filename'} = '' . ($source);
} elsif(ref $source) {
$self->{'source_filename'} = '' . ($source);
} elsif(!length $source) {
Carp::croak("Can't use empty-string as a source for parse_file");
} else {
{
local *PODSOURCE;
open(PODSOURCE, "<$source") || Carp::croak("Can't open $source: $!");
$self->{'source_filename'} = $source;
$source = *PODSOURCE{IO};
}
$self->_init_fh_source($source);
}
# By here, $source is a FH.
$self->{'source_fh'} = $source;
my($i, @lines);
until( $self->{'source_dead'} ) {
splice @lines;
for($i = MANY_LINES; $i--;) { # read those many lines at a time
local $/ = $NL;
push @lines, scalar(<$source>); # readline
last unless defined $lines[-1];
# but pass thru the undef, which will set source_dead to true
}
my $at_eof = ! $lines[-1]; # keep track of the undef
pop @lines if $at_eof; # silence warnings
# be eol agnostic
s/\r\n?/\n/g for @lines;
# make sure there are only one line elements for parse_lines
@lines = split(/(?<=\n)/, join('', @lines));
# push the undef back after popping it to set source_dead to true
push @lines, undef if $at_eof;
$self->parse_lines(@lines);
}
delete($self->{'source_fh'}); # so it can be GC'd
return $self;
}
#:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.
sub parse_from_file {
# An emulation of Pod::Parser's interface, for the sake of Perldoc.
# Basically just a wrapper around parse_file.
my($self, $source, $to) = @_;
$self = $self->new unless ref($self); # so we tolerate being a class method
if(!defined $source) { $source = *STDIN{IO}
} elsif(ref(\$source) eq 'GLOB') { # stet
} elsif(ref($source) ) { # stet
} elsif(!length $source
or $source eq '-' or $source =~ m/^<&(?:STDIN|0)$/i
) {
$source = *STDIN{IO};
}
if(!defined $to) { $self->output_fh( *STDOUT{IO} );
} elsif(ref(\$to) eq 'GLOB') { $self->output_fh( $to );
} elsif(ref($to)) { $self->output_fh( $to );
} elsif(!length $to
or $to eq '-' or $to =~ m/^>&?(?:STDOUT|1)$/i
) {
$self->output_fh( *STDOUT{IO} );
} elsif($to =~ m/^>&(?:STDERR|2)$/i) {
$self->output_fh( *STDERR{IO} );
} else {
require Symbol;
my $out_fh = Symbol::gensym();
DEBUG and print STDERR "Write-opening to $to\n";
open($out_fh, ">$to") or Carp::croak "Can't write-open $to: $!";
binmode($out_fh)
if $self->can('write_with_binmode') and $self->write_with_binmode;
$self->output_fh($out_fh);
}
return $self->parse_file($source);
}
#-----------------------------------------------------------------------------
sub whine {
#my($self,$line,$complaint) = @_;
my $self = shift(@_);
++$self->{'errors_seen'};
if($self->{'no_whining'}) {
DEBUG > 9 and print STDERR "Discarding complaint (at line $_[0]) $_[1]\n because no_whining is on.\n";
return;
}
push @{$self->{'all_errata'}{$_[0]}}, $_[1];
return $self->_complain_warn(@_) if $self->{'complain_stderr'};
return $self->_complain_errata(@_);
}
sub scream { # like whine, but not suppressible
#my($self,$line,$complaint) = @_;
my $self = shift(@_);
++$self->{'errors_seen'};
push @{$self->{'all_errata'}{$_[0]}}, $_[1];
return $self->_complain_warn(@_) if $self->{'complain_stderr'};
return $self->_complain_errata(@_);
}
sub _complain_warn {
my($self,$line,$complaint) = @_;
return printf STDERR "%s around line %s: %s\n",
$self->{'source_filename'} || 'Pod input', $line, $complaint;
}
sub _complain_errata {
my($self,$line,$complaint) = @_;
if( $self->{'no_errata_section'} ) {
DEBUG > 9 and print STDERR "Discarding erratum (at line $line) $complaint\n because no_errata_section is on.\n";
} else {
DEBUG > 9 and print STDERR "Queuing erratum (at line $line) $complaint\n";
push @{$self->{'errata'}{$line}}, $complaint
# for a report to be generated later!
}
return 1;
}
#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
sub _get_initial_item_type {
# A hack-wrapper here for when you have like "=over\n\n=item 456\n\n"
my($self, $para) = @_;
return $para->[1]{'~type'} if $para->[1]{'~type'};
return $para->[1]{'~type'} = 'text'
if join("\n", @{$para}[2 .. $#$para]) =~ m/^\s*(\d+)\.?\s*$/s and $1 ne '1';
# Else fall thru to the general case:
return $self->_get_item_type($para);
}
sub _get_item_type { # mutates the item!!
my($self, $para) = @_;
return $para->[1]{'~type'} if $para->[1]{'~type'};
# Otherwise we haven't yet been to this node. Maybe alter it...
my $content = join "\n", @{$para}[2 .. $#$para];
if($content =~ m/^\s*\*\s*$/s or $content =~ m/^\s*$/s) {
# Like: "=item *", "=item * ", "=item"
splice @$para, 2; # so it ends up just being ['=item', { attrhash } ]
$para->[1]{'~orig_content'} = $content;
return $para->[1]{'~type'} = 'bullet';
} elsif($content =~ m/^\s*\*\s+(.+)/s) { # tolerance
# Like: "=item * Foo bar baz";
$para->[1]{'~orig_content'} = $content;
$para->[1]{'~_freaky_para_hack'} = $1;
DEBUG > 2 and print STDERR " Tolerating $$para[2] as =item *\\n\\n$1\n";
splice @$para, 2; # so it ends up just being ['=item', { attrhash } ]
return $para->[1]{'~type'} = 'bullet';
} elsif($content =~ m/^\s*(\d+)\.?\s*$/s) {
# Like: "=item 1.", "=item 123412"
$para->[1]{'~orig_content'} = $content;
$para->[1]{'number'} = $1; # Yes, stores the number there!
splice @$para, 2; # so it ends up just being ['=item', { attrhash } ]
return $para->[1]{'~type'} = 'number';
} else {
# It's anything else.
return $para->[1]{'~type'} = 'text';
}
}
#-----------------------------------------------------------------------------
sub _make_treelet {
my $self = shift; # and ($para, $start_line)
my $treelet;
if(!@_) {
return [''];
} if(ref $_[0] and ref $_[0][0] and $_[0][0][0] eq '~Top') {
# Hack so we can pass in fake-o pre-cooked paragraphs:
# just have the first line be a reference to a ['~Top', {}, ...]
# We use this feechure in gen_errata and stuff.
DEBUG and print STDERR "Applying precooked treelet hack to $_[0][0]\n";
$treelet = $_[0][0];
splice @$treelet, 0, 2; # lop the top off
return $treelet;
} else {
$treelet = $self->_treelet_from_formatting_codes(@_);
}
if( ! $self->{'_output_is_for_JustPod'} # Retain these as-is for pod output
&& $self->_remap_sequences($treelet) )
{
$self->_treat_Zs($treelet); # Might as well nix these first
$self->_treat_Ls($treelet); # L has to precede E and S
$self->_treat_Es($treelet);
$self->_treat_Ss($treelet); # S has to come after E
$self->_wrap_up($treelet); # Nix X's and merge texties
} else {
DEBUG and print STDERR "Formatless treelet gets fast-tracked.\n";
# Very common case!
}
splice @$treelet, 0, 2; # lop the top off
return $treelet;
}
#:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.
sub _wrap_up {
my($self, @stack) = @_;
my $nixx = $self->{'nix_X_codes'};
my $merge = $self->{'merge_text' };
return unless $nixx or $merge;
DEBUG > 2 and print STDERR "\nStarting _wrap_up traversal.\n",
$merge ? (" Merge mode on\n") : (),
$nixx ? (" Nix-X mode on\n") : (),
;
my($i, $treelet);
while($treelet = shift @stack) {
DEBUG > 3 and print STDERR " Considering children of this $treelet->[0] node...\n";
for($i = 2; $i < @$treelet; ++$i) { # iterate over children
DEBUG > 3 and print STDERR " Considering child at $i ", pretty($treelet->[$i]), "\n";
if($nixx and ref $treelet->[$i] and $treelet->[$i][0] eq 'X') {
DEBUG > 3 and print STDERR " Nixing X node at $i\n";
splice(@$treelet, $i, 1); # just nix this node (and its descendants)
# no need to back-update the counter just yet
redo;
} elsif($merge and $i != 2 and # non-initial
!ref $treelet->[$i] and !ref $treelet->[$i - 1]
) {
DEBUG > 3 and print STDERR " Merging ", $i-1,
":[$treelet->[$i-1]] and $i\:[$treelet->[$i]]\n";
$treelet->[$i-1] .= ( splice(@$treelet, $i, 1) )[0];
DEBUG > 4 and print STDERR " Now: ", $i-1, ":[$treelet->[$i-1]]\n";
--$i;
next;
# since we just pulled the possibly last node out from under
# ourselves, we can't just redo()
} elsif( ref $treelet->[$i] ) {
DEBUG > 4 and print STDERR " Enqueuing ", pretty($treelet->[$i]), " for traversal.\n";
push @stack, $treelet->[$i];
if($treelet->[$i][0] eq 'L') {
my $thing;
foreach my $attrname ('section', 'to') {
if(defined($thing = $treelet->[$i][1]{$attrname}) and ref $thing) {
unshift @stack, $thing;
DEBUG > 4 and print STDERR " +Enqueuing ",
pretty( $treelet->[$i][1]{$attrname} ),
" as an attribute value to tweak.\n";
}
}
}
}
}
}
DEBUG > 2 and print STDERR "End of _wrap_up traversal.\n\n";
return;
}
#:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.
sub _remap_sequences {
my($self,@stack) = @_;
if(@stack == 1 and @{ $stack[0] } == 3 and !ref $stack[0][2]) {
# VERY common case: abort it.
DEBUG and print STDERR "Skipping _remap_sequences: formatless treelet.\n";
return 0;
}
my $map = ($self->{'accept_codes'} || die "NO accept_codes in $self?!?");
my $start_line = $stack[0][1]{'start_line'};
DEBUG > 2 and printf
"\nAbout to start _remap_sequences on treelet from line %s.\n",
$start_line || '[?]'
;
DEBUG > 3 and print STDERR " Map: ",
join('; ', map "$_=" . (
ref($map->{$_}) ? join(",", @{$map->{$_}}) : $map->{$_}
),
sort keys %$map ),
("B~C~E~F~I~L~S~X~Z" eq join '~', sort keys %$map)
? " (all normal)\n" : "\n"
;
# A recursive algorithm implemented iteratively! Whee!
my($is, $was, $i, $treelet); # scratch
while($treelet = shift @stack) {
DEBUG > 3 and print STDERR " Considering children of this $treelet->[0] node...\n";
for($i = 2; $i < @$treelet; ++$i) { # iterate over children
next unless ref $treelet->[$i]; # text nodes are uninteresting
DEBUG > 4 and print STDERR " Noting child $i : $treelet->[$i][0]<...>\n";
$is = $treelet->[$i][0] = $map->{ $was = $treelet->[$i][0] };
if( DEBUG > 3 ) {
if(!defined $is) {
print STDERR " Code $was<> is UNKNOWN!\n";
} elsif($is eq $was) {
DEBUG > 4 and print STDERR " Code $was<> stays the same.\n";
} else {
print STDERR " Code $was<> maps to ",
ref($is)
? ( "tags ", map("$_<", @$is), '...', map('>', @$is), "\n" )
: "tag $is<...>.\n";
}
}
if(!defined $is) {
$self->whine($start_line, "Deleting unknown formatting code $was<>");
$is = $treelet->[$i][0] = '1'; # But saving the children!
# I could also insert a leading "$was<" and tailing ">" as
# children of this node, but something about that seems icky.
}
if(ref $is) {
my @dynasty = @$is;
DEBUG > 4 and print STDERR " Renaming $was node to $dynasty[-1]\n";
$treelet->[$i][0] = pop @dynasty;
my $nugget;
while(@dynasty) {
DEBUG > 4 and printf
" Grafting a new %s node between %s and %s\n",
$dynasty[-1], $treelet->[0], $treelet->[$i][0],
;
#$nugget = ;
splice @$treelet, $i, 1, [pop(@dynasty), {}, $treelet->[$i]];
# relace node with a new parent
}
} elsif($is eq '0') {
splice(@$treelet, $i, 1); # just nix this node (and its descendants)
--$i; # back-update the counter
} elsif($is eq '1') {
splice(@$treelet, $i, 1 # replace this node with its children!
=> splice @{ $treelet->[$i] },2
# (not catching its first two (non-child) items)
);
--$i; # back up for new stuff
} else {
# otherwise it's unremarkable
unshift @stack, $treelet->[$i]; # just recurse
}
}
}
DEBUG > 2 and print STDERR "End of _remap_sequences traversal.\n\n";
if(@_ == 2 and @{ $_[1] } == 3 and !ref $_[1][2]) {
DEBUG and print STDERR "Noting that the treelet is now formatless.\n";
return 0;
}
return 1;
}
# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
sub _ponder_extend {
# "Go to an extreme, move back to a more comfortable place"
# -- /Oblique Strategies/, Brian Eno and Peter Schmidt
my($self, $para) = @_;
my $content = join ' ', splice @$para, 2;
$content =~ s/^\s+//s;
$content =~ s/\s+$//s;
DEBUG > 2 and print STDERR "Ogling extensor: =extend $content\n";
if($content =~
m/^
(\S+) # 1 : new item
\s+
(\S+) # 2 : fallback(s)
(?:\s+(\S+))? # 3 : element name(s)
\s*
$
/xs
) {
my $new_letter = $1;
my $fallbacks_one = $2;
my $elements_one;
$elements_one = defined($3) ? $3 : $1;
DEBUG > 2 and print STDERR "Extensor has good syntax.\n";
unless($new_letter =~ m/^[A-Z]$/s or $new_letter) {
DEBUG > 2 and print STDERR " $new_letter isn't a valid thing to entend.\n";
$self->whine(
$para->[1]{'start_line'},
"You can extend only formatting codes A-Z, not like \"$new_letter\""
);
return;
}
if(grep $new_letter eq $_, @Known_formatting_codes) {
DEBUG > 2 and print STDERR " $new_letter isn't a good thing to extend, because known.\n";
$self->whine(
$para->[1]{'start_line'},
"You can't extend an established code like \"$new_letter\""
);
#TODO: or allow if last bit is same?
return;
}
unless($fallbacks_one =~ m/^[A-Z](,[A-Z])*$/s # like "B", "M,I", etc.
or $fallbacks_one eq '0' or $fallbacks_one eq '1'
) {
$self->whine(
$para->[1]{'start_line'},
"Format for second =extend parameter must be like"
. " M or 1 or 0 or M,N or M,N,O but you have it like "
. $fallbacks_one
);
return;
}
unless($elements_one =~ m/^[^ ,]+(,[^ ,]+)*$/s) { # like "B", "M,I", etc.
$self->whine(
$para->[1]{'start_line'},
"Format for third =extend parameter: like foo or bar,Baz,qu:ux but not like "
. $elements_one
);
return;
}
my @fallbacks = split ',', $fallbacks_one, -1;
my @elements = split ',', $elements_one, -1;
foreach my $f (@fallbacks) {
next if exists $Known_formatting_codes{$f} or $f eq '0' or $f eq '1';
DEBUG > 2 and print STDERR " Can't fall back on unknown code $f\n";
$self->whine(
$para->[1]{'start_line'},
"Can't use unknown formatting code '$f' as a fallback for '$new_letter'"
);
return;
}
DEBUG > 3 and printf STDERR "Extensor: Fallbacks <%s> Elements <%s>.\n",
@fallbacks, @elements;
my $canonical_form;
foreach my $e (@elements) {
if(exists $self->{'accept_codes'}{$e}) {
DEBUG > 1 and print STDERR " Mapping '$new_letter' to known extension '$e'\n";
$canonical_form = $e;
last; # first acceptable elementname wins!
} else {
DEBUG > 1 and print STDERR " Can't map '$new_letter' to unknown extension '$e'\n";
}
}
if( defined $canonical_form ) {
# We found a good N => elementname mapping
$self->{'accept_codes'}{$new_letter} = $canonical_form;
DEBUG > 2 and print
"Extensor maps $new_letter => known element $canonical_form.\n";
} else {
# We have to use the fallback(s), which might be '0', or '1'.
$self->{'accept_codes'}{$new_letter}
= (@fallbacks == 1) ? $fallbacks[0] : \@fallbacks;
DEBUG > 2 and print
"Extensor maps $new_letter => fallbacks @fallbacks.\n";
}
} else {
DEBUG > 2 and print STDERR "Extensor has bad syntax.\n";
$self->whine(
$para->[1]{'start_line'},
"Unknown =extend syntax: $content"
)
}
return;
}
#:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.
sub _treat_Zs { # Nix Z<...>'s
my($self,@stack) = @_;
my($i, $treelet);
my $start_line = $stack[0][1]{'start_line'};
# A recursive algorithm implemented iteratively! Whee!
while($treelet = shift @stack) {
for($i = 2; $i < @$treelet; ++$i) { # iterate over children
next unless ref $treelet->[$i]; # text nodes are uninteresting
unless($treelet->[$i][0] eq 'Z') {
unshift @stack, $treelet->[$i]; # recurse
next;
}
DEBUG > 1 and print STDERR "Nixing Z node @{$treelet->[$i]}\n";
# bitch UNLESS it's empty
unless( @{$treelet->[$i]} == 2
or (@{$treelet->[$i]} == 3 and $treelet->[$i][2] eq '')
) {
$self->whine( $start_line, "A non-empty Z<>" );
} # but kill it anyway
splice(@$treelet, $i, 1); # thereby just nix this node.
--$i;
}
}
return;
}
# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
# Quoting perlpodspec:
# In parsing an L<...> code, Pod parsers must distinguish at least four
# attributes:
############# Not used. Expressed via the element children plus
############# the value of the "content-implicit" flag.
# First:
# The link-text. If there is none, this must be undef. (E.g., in "L<Perl
# Functions|perlfunc>", the link-text is "Perl Functions". In
# "L<Time::HiRes>" and even "L<|Time::HiRes>", there is no link text. Note
# that link text may contain formatting.)
#
############# The element children
# Second:
# The possibly inferred link-text -- i.e., if there was no real link text,
# then this is the text that we'll infer in its place. (E.g., for
# "L<Getopt::Std>", the inferred link text is "Getopt::Std".)
#
############# The "to" attribute (which might be text, or a treelet)
# Third:
# The name or URL, or undef if none. (E.g., in "L<Perl
# Functions|perlfunc>", the name -- also sometimes called the page -- is
# "perlfunc". In "L</CAVEATS>", the name is undef.)
#
############# The "section" attribute (which might be next, or a treelet)
# Fourth:
# The section (AKA "item" in older perlpods), or undef if none. E.g., in
# Getopt::Std/DESCRIPTION, "DESCRIPTION" is the section. (Note that this
# is not the same as a manpage section like the "5" in "man 5 crontab".
# "Section Foo" in the Pod sense means the part of the text that's
# introduced by the heading or item whose text is "Foo".)
#
# Pod parsers may also note additional attributes including:
#
############# The "type" attribute.
# Fifth:
# A flag for whether item 3 (if present) is a URL (like
# "http://lists.perl.org" is), in which case there should be no section
# attribute; a Pod name (like "perldoc" and "Getopt::Std" are); or
# possibly a man page name (like "crontab(5)" is).
#
############# The "raw" attribute that is already there.
# Sixth:
# The raw original L<...> content, before text is split on "|", "/", etc,
# and before E<...> codes are expanded.
# For L<...> codes without a "name|" part, only E<...> and Z<> codes may
# occur -- no other formatting codes. That is, authors should not use
# "L<B<Foo::Bar>>".
#
# Note, however, that formatting codes and Z<>'s can occur in any and all
# parts of an L<...> (i.e., in name, section, text, and url).
sub _treat_Ls { # Process our dear dear friends, the L<...> sequences
# L<name>
# L<name/"sec"> or L<name/sec>
# L</"sec"> or L</sec> or L<"sec">
# L<text|name>
# L<text|name/"sec"> or L<text|name/sec>
# L<text|/"sec"> or L<text|/sec> or L<text|"sec">
# L<scheme:...>
# L<text|scheme:...>
my($self,@stack) = @_;
my($i, $treelet);
my $start_line = $stack[0][1]{'start_line'};
# A recursive algorithm implemented iteratively! Whee!
while($treelet = shift @stack) {
for(my $i = 2; $i < @$treelet; ++$i) {
# iterate over children of current tree node
next unless ref $treelet->[$i]; # text nodes are uninteresting
unless($treelet->[$i][0] eq 'L') {
unshift @stack, $treelet->[$i]; # recurse
next;
}
# By here, $treelet->[$i] is definitely an L node
my $ell = $treelet->[$i];
DEBUG > 1 and print STDERR "Ogling L node " . pretty($ell) . "\n";
# bitch if it's empty or is just '/'
if (@{$ell} == 3 and $ell->[2] =~ m!\A\s*/\s*\z!) {
$self->whine( $start_line, "L<> contains only '/'" );
$treelet->[$i] = 'L</>'; # just make it a text node
next; # and move on
}
if( @{$ell} == 2
or (@{$ell} == 3 and $ell->[2] eq '')
) {
$self->whine( $start_line, "An empty L<>" );
$treelet->[$i] = 'L<>'; # just make it a text node
next; # and move on
}
if( (! ref $ell->[2] && $ell->[2] =~ /\A\s/)
||(! ref $ell->[-1] && $ell->[-1] =~ /\s\z/)
) {
$self->whine( $start_line, "L<> starts or ends with whitespace" );
}
# Catch URLs:
# there are a number of possible cases:
# 1) text node containing url: http://foo.com
# -> [ 'http://foo.com' ]
# 2) text node containing url and text: foo|http://foo.com
# -> [ 'foo|http://foo.com' ]
# 3) text node containing url start: mailto:xE<at>foo.com
# -> [ 'mailto:x', [ E ... ], 'foo.com' ]
# 4) text node containing url start and text: foo|mailto:xE<at>foo.com
# -> [ 'foo|mailto:x', [ E ... ], 'foo.com' ]
# 5) other nodes containing text and url start: OE<39>Malley|http://foo.com
# -> [ 'O', [ E ... ], 'Malley', '|http://foo.com' ]
# ... etc.
# anything before the url is part of the text.
# anything after it is part of the url.
# the url text node itself may contain parts of both.
if (my ($url_index, $text_part, $url_part) =
# grep is no good here; we want to bail out immediately so that we can
# use $1, $2, etc. without having to do the match twice.
sub {
for (2..$#$ell) {
next if ref $ell->[$_];
next unless $ell->[$_] =~ m/^(?:([^|]*)\|)?(\w+:[^:\s]\S*)$/s;
return ($_, $1, $2);
}
return;
}->()
) {
$ell->[1]{'type'} = 'url';
my @text = @{$ell}[2..$url_index-1];
push @text, $text_part if defined $text_part;
my @url = @{$ell}[$url_index+1..$#$ell];
unshift @url, $url_part;
unless (@text) {
$ell->[1]{'content-implicit'} = 'yes';
@text = @url;
}
$ell->[1]{to} = Pod::Simple::LinkSection->new(
@url == 1
? $url[0]
: [ '', {}, @url ],
);
splice @$ell, 2, $#$ell, @text;
next;
}
# Catch some very simple and/or common cases
if(@{$ell} == 3 and ! ref $ell->[2]) {
my $it = $ell->[2];
if($it =~ m{^[^/|]+[(][-a-zA-Z0-9]+[)]$}s) { # man sections
# Hopefully neither too broad nor too restrictive a RE
DEBUG > 1 and print STDERR "Catching \"$it\" as manpage link.\n";
$ell->[1]{'type'} = 'man';
# This's the only place where man links can get made.
$ell->[1]{'content-implicit'} = 'yes';
$ell->[1]{'to' } =
Pod::Simple::LinkSection->new( $it ); # treelet!
next;
}
if($it =~ m/^[^\/\|,\$\%\@\ \"\<\>\:\#\&\*\{\}\[\]\(\)]+(\:\:[^\/\|,\$\%\@\ \"\<\>\:\#\&\*\{\}\[\]\(\)]+)*$/s) {
# Extremely forgiving idea of what constitutes a bare
# modulename link like L<Foo::Bar> or even L<Thing::1.0::Docs::Tralala>
DEBUG > 1 and print STDERR "Catching \"$it\" as ho-hum L<Modulename> link.\n";
$ell->[1]{'type'} = 'pod';
$ell->[1]{'content-implicit'} = 'yes';
$ell->[1]{'to' } =
Pod::Simple::LinkSection->new( $it ); # treelet!
next;
}
# else fall thru...
}
# ...Uhoh, here's the real L<...> parsing stuff...
# "With the ill behavior, with the ill behavior, with the ill behavior..."
DEBUG > 1 and print STDERR "Running a real parse on this non-trivial L\n";
my $link_text; # set to an arrayref if found
my @ell_content = @$ell;
splice @ell_content,0,2; # Knock off the 'L' and {} bits
DEBUG > 3 and print STDERR " Ell content to start: ",
pretty(@ell_content), "\n";
# Look for the "|" -- only in CHILDREN (not all underlings!)
# Like L<I like the strictness|strict>
DEBUG > 3 and
print STDERR " Peering at L content for a '|' ...\n";
for(my $j = 0; $j < @ell_content; ++$j) {
next if ref $ell_content[$j];
DEBUG > 3 and
print STDERR " Peering at L-content text bit \"$ell_content[$j]\" for a '|'.\n";
if($ell_content[$j] =~ m/^([^\|]*)\|(.*)$/s) {
my @link_text = ($1); # might be 0-length
$ell_content[$j] = $2; # might be 0-length
DEBUG > 3 and
print STDERR " FOUND a '|' in it. Splitting into [$1] + [$2]\n";
if ($link_text[0] =~ m{[|/]}) {
$self->whine(
$start_line,
"alternative text '$link_text[0]' contains non-escaped | or /"
);
}
unshift @link_text, splice @ell_content, 0, $j;
# leaving only things at J and after
@ell_content = grep ref($_)||length($_), @ell_content ;
$link_text = [grep ref($_)||length($_), @link_text ];
DEBUG > 3 and printf
" So link text is %s\n and remaining ell content is %s\n",
pretty($link_text), pretty(@ell_content);
last;
}
}
# Now look for the "/" -- only in CHILDREN (not all underlings!)
# And afterward, anything left in @ell_content will be the raw name
# Like L<Foo::Bar/Object Methods>
my $section_name; # set to arrayref if found
DEBUG > 3 and print STDERR " Peering at L-content for a '/' ...\n";
for(my $j = 0; $j < @ell_content; ++$j) {
next if ref $ell_content[$j];
DEBUG > 3 and
print STDERR " Peering at L-content text bit \"$ell_content[$j]\" for a '/'.\n";
if($ell_content[$j] =~ m/^([^\/]*)\/(.*)$/s) {
my @section_name = ($2); # might be 0-length
$ell_content[$j] = $1; # might be 0-length
DEBUG > 3 and
print STDERR " FOUND a '/' in it.",
" Splitting to page [...$1] + section [$2...]\n";
push @section_name, splice @ell_content, 1+$j;
# leaving only things before and including J
@ell_content = grep ref($_)||length($_), @ell_content ;
@section_name = grep ref($_)||length($_), @section_name ;
# Turn L<.../"foo"> into L<.../foo>
if(@section_name
and !ref($section_name[0]) and !ref($section_name[-1])
and $section_name[ 0] =~ m/^\"/s
and $section_name[-1] =~ m/\"$/s
and !( # catch weird degenerate case of L<"> !
@section_name == 1 and $section_name[0] eq '"'
)
) {
$section_name[ 0] =~ s/^\"//s;
$section_name[-1] =~ s/\"$//s;
DEBUG > 3 and
print STDERR " Quotes removed: ", pretty(@section_name), "\n";
} else {
DEBUG > 3 and
print STDERR " No need to remove quotes in ", pretty(@section_name), "\n";
}
$section_name = \@section_name;
last;
}
}
# Turn L<"Foo Bar"> into L</Foo Bar>
if(!$section_name and @ell_content
and !ref($ell_content[0]) and !ref($ell_content[-1])
and $ell_content[ 0] =~ m/^\"/s
and $ell_content[-1] =~ m/\"$/s
and !( # catch weird degenerate case of L<"> !
@ell_content == 1 and $ell_content[0] eq '"'
)
) {
$section_name = [splice @ell_content];
$section_name->[ 0] =~ s/^\"//s;
$section_name->[-1] =~ s/\"$//s;
$ell->[1]{'~tolerated'} = 1;
}
# Turn L<Foo Bar> into L</Foo Bar>.
if(!$section_name and !$link_text and @ell_content
and grep !ref($_) && m/ /s, @ell_content
) {
$section_name = [splice @ell_content];
$ell->[1]{'~deprecated'} = 1;
# That's support for the now-deprecated syntax.
# Note that it deliberately won't work on L<...|Foo Bar>
}
# Now make up the link_text
# L<Foo> -> L<Foo|Foo>
# L</Bar> -> L<"Bar"|Bar>
# L<Foo/Bar> -> L<"Bar" in Foo/Foo>
unless($link_text) {
$ell->[1]{'content-implicit'} = 'yes';
$link_text = [];
push @$link_text, '"', @$section_name, '"' if $section_name;
if(@ell_content) {
$link_text->[-1] .= ' in ' if $section_name;
push @$link_text, @ell_content;
}
}
# And the E resolver will have to deal with all our treeletty things:
if(@ell_content == 1 and !ref($ell_content[0])
and $ell_content[0] =~ m{^[^/]+[(][-a-zA-Z0-9]+[)]$}s
) {
$ell->[1]{'type'} = 'man';
DEBUG > 3 and print STDERR "Considering this ($ell_content[0]) a man link.\n";
} else {
$ell->[1]{'type'} = 'pod';
DEBUG > 3 and print STDERR "Considering this a pod link (not man or url).\n";
}
if( defined $section_name ) {
$ell->[1]{'section'} = Pod::Simple::LinkSection->new(
['', {}, @$section_name]
);
DEBUG > 3 and print STDERR "L-section content: ", pretty($ell->[1]{'section'}), "\n";
}
if( @ell_content ) {
$ell->[1]{'to'} = Pod::Simple::LinkSection->new(
['', {}, @ell_content]
);
DEBUG > 3 and print STDERR "L-to content: ", pretty($ell->[1]{'to'}), "\n";
}
# And update children to be the link-text:
@$ell = (@$ell[0,1], defined($link_text) ? splice(@$link_text) : '');
DEBUG > 2 and print STDERR "End of L-parsing for this node " . pretty($treelet->[$i]) . "\n";
unshift @stack, $treelet->[$i]; # might as well recurse
}
}
return;
}
# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
sub _treat_Es {
my($self,@stack) = @_;
my($i, $treelet, $content, $replacer, $charnum);
my $start_line = $stack[0][1]{'start_line'};
# A recursive algorithm implemented iteratively! Whee!
# Has frightening side effects on L nodes' attributes.
#my @ells_to_tweak;
while($treelet = shift @stack) {
for(my $i = 2; $i < @$treelet; ++$i) { # iterate over children
next unless ref $treelet->[$i]; # text nodes are uninteresting
if($treelet->[$i][0] eq 'L') {
# SPECIAL STUFF for semi-processed L<>'s
my $thing;
foreach my $attrname ('section', 'to') {
if(defined($thing = $treelet->[$i][1]{$attrname}) and ref $thing) {
unshift @stack, $thing;
DEBUG > 2 and print STDERR " Enqueuing ",
pretty( $treelet->[$i][1]{$attrname} ),
" as an attribute value to tweak.\n";
}
}
unshift @stack, $treelet->[$i]; # recurse
next;
} elsif($treelet->[$i][0] ne 'E') {
unshift @stack, $treelet->[$i]; # recurse
next;
}
DEBUG > 1 and print STDERR "Ogling E node ", pretty($treelet->[$i]), "\n";
# bitch if it's empty
if( @{$treelet->[$i]} == 2
or (@{$treelet->[$i]} == 3 and $treelet->[$i][2] eq '')
) {
$self->whine( $start_line, "An empty E<>" );
$treelet->[$i] = 'E<>'; # splice in a literal
next;
}
# bitch if content is weird
unless(@{$treelet->[$i]} == 3 and !ref($content = $treelet->[$i][2])) {
$self->whine( $start_line, "An E<...> surrounding strange content" );
$replacer = $treelet->[$i]; # scratch
splice(@$treelet, $i, 1, # fake out a literal
'E<',
splice(@$replacer,2), # promote its content
'>'
);
# Don't need to do --$i, as the 'E<' we just added isn't interesting.
next;
}
DEBUG > 1 and print STDERR "Ogling E<$content>\n";
# XXX E<>'s contents *should* be a valid char in the scope of the current
# =encoding directive. Defaults to iso-8859-1, I believe. Fix this in the
# future sometime.
$charnum = Pod::Escapes::e2charnum($content);
DEBUG > 1 and print STDERR " Considering E<$content> with char ",
defined($charnum) ? $charnum : "undef", ".\n";
if(!defined( $charnum )) {
DEBUG > 1 and print STDERR "I don't know how to deal with E<$content>.\n";
$self->whine( $start_line, "Unknown E content in E<$content>" );
$replacer = "E<$content>"; # better than nothing
} elsif($charnum >= 255 and !UNICODE) {
$replacer = ASCII ? "\xA4" : "?";
DEBUG > 1 and print STDERR "This Perl version can't handle ",
"E<$content> (chr $charnum), so replacing with $replacer\n";
} else {
$replacer = Pod::Escapes::e2char($content);
DEBUG > 1 and print STDERR " Replacing E<$content> with $replacer\n";
}
splice(@$treelet, $i, 1, $replacer); # no need to back up $i, tho
}
}
return;
}
# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
sub _treat_Ss {
my($self,$treelet) = @_;
_change_S_to_nbsp($treelet,0) if $self->{'nbsp_for_S'};
# TODO: or a change_nbsp_to_S
# Normalizing nbsp's to S is harder: for each text node, make S content
# out of anything matching m/([^ \xA0]*(?:\xA0+[^ \xA0]*)+)/
return;
}
sub _change_S_to_nbsp { # a recursive function
# Sanely assumes that the top node in the excursion won't be an S node.
my($treelet, $in_s) = @_;
my $is_s = ('S' eq $treelet->[0]);
$in_s ||= $is_s; # So in_s is on either by this being an S element,
# or by an ancestor being an S element.
for(my $i = 2; $i < @$treelet; ++$i) {
if(ref $treelet->[$i]) {
if( _change_S_to_nbsp( $treelet->[$i], $in_s ) ) {
my $to_pull_up = $treelet->[$i];
splice @$to_pull_up,0,2; # ...leaving just its content
splice @$treelet, $i, 1, @$to_pull_up; # Pull up content
$i += @$to_pull_up - 1; # Make $i skip the pulled-up stuff
}
} else {
$treelet->[$i] =~ s/\s/$Pod::Simple::nbsp/g if $in_s;
# Note that if you apply nbsp_for_S to text, and so turn
# "foo S<bar baz> quux" into "foo bar faz quux", you
# end up with something that fails to say "and don't hyphenate
# any part of 'bar baz'". However, hyphenation is such a vexing
# problem anyway, that most Pod renderers just don't render it
# at all. But if you do want to implement hyphenation, I guess
# that you'd better have nbsp_for_S off.
}
}
return $is_s;
}
#-----------------------------------------------------------------------------
sub _accessorize { # A simple-minded method-maker
no strict 'refs';
foreach my $attrname (@_) {
next if $attrname =~ m/::/; # a hack
*{caller() . '::' . $attrname} = sub {
use strict;
$Carp::CarpLevel = 1, Carp::croak(
"Accessor usage: \$obj->$attrname() or \$obj->$attrname(\$new_value)"
) unless (@_ == 1 or @_ == 2) and ref $_[0];
(@_ == 1) ? $_[0]->{$attrname}
: ($_[0]->{$attrname} = $_[1]);
};
}
# Ya know, they say accessories make the ensemble!
return;
}
# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
#=============================================================================
sub filter {
my($class, $source) = @_;
my $new = $class->new;
$new->output_fh(*STDOUT{IO});
if(ref($source || '') eq 'SCALAR') {
$new->parse_string_document( $$source );
} elsif(ref($source)) { # it's a file handle
$new->parse_file($source);
} else { # it's a filename
$new->parse_file($source);
}
return $new;
}
#-----------------------------------------------------------------------------
sub _out {
# For use in testing: Class->_out($source)
# returns the transformation of $source
my $class = shift(@_);
my $mutor = shift(@_) if @_ and ref($_[0] || '') eq 'CODE';
DEBUG and print STDERR "\n\n", '#' x 76,
"\nAbout to parse source: {{\n$_[0]\n}}\n\n";
my $parser = ref $class && $class->isa(__PACKAGE__) ? $class : $class->new;
$parser->hide_line_numbers(1);
my $out = '';
$parser->output_string( \$out );
DEBUG and print STDERR " _out to ", \$out, "\n";
$mutor->($parser) if $mutor;
$parser->parse_string_document( $_[0] );
# use Data::Dumper; print STDERR Dumper($parser), "\n";
return $out;
}
sub _duo {
# For use in testing: Class->_duo($source1, $source2)
# returns the parse trees of $source1 and $source2.
# Good in things like: &ok( Class->duo(... , ...) );
my $class = shift(@_);
Carp::croak "But $class->_duo is useful only in list context!"
unless wantarray;
my $mutor = shift(@_) if @_ and ref($_[0] || '') eq 'CODE';
Carp::croak "But $class->_duo takes two parameters, not: @_"
unless @_ == 2;
my(@out);
while( @_ ) {
my $parser = $class->new;
push @out, '';
$parser->output_string( \( $out[-1] ) );
DEBUG and print STDERR " _duo out to ", $parser->output_string(),
" = $parser->{'output_string'}\n";
$parser->hide_line_numbers(1);
$mutor->($parser) if $mutor;
$parser->parse_string_document( shift( @_ ) );
# use Data::Dumper; print STDERR Dumper($parser), "\n";
}
return @out;
}
#-----------------------------------------------------------------------------
1;
__END__
TODO:
A start_formatting_code and end_formatting_code methods, which in the
base class call start_L, end_L, start_C, end_C, etc., if they are
defined.
have the POD FORMATTING ERRORS section note the localtime, and the
version of Pod::Simple.
option to delete all E<shy>s?
option to scream if under-0x20 literals are found in the input, or
under-E<32> E codes are found in the tree. And ditto \x7f-\x9f
Option to turn highbit characters into their compromised form? (applies
to E parsing too)
TODO: BOM/encoding things.
TODO: ascii-compat things in the XML classes?
OHA YOOOO