--- gvpe/doc/pod2texi	2004/07/07 00:28:20	1.4
+++ gvpe/doc/pod2texi	2005/04/16 19:39:23	1.7
@@ -1,6 +1,8 @@
 #!/usr/bin/perl
 
-use Pod::Tree;
+# TODO: texinfo fails on @cindex in title elements etc. *sigh*
+
+use Pod::POM;
 	
 sub escape_texi($) {
    local $_ = shift;
@@ -11,110 +13,181 @@
 
 sub example {
    my $text = $_[0];
-   print "\n\n\@example\n";
    $text =~ s/\n+$//;
    $text =~ s/([\@\{\}])/\@$1/g;
-   print $text;
-   print "\n\@end example\n\n";
+
+   "\n\n\@example\n"
+   . $text
+   . "\n\@end example\n\n";
+}
+
+my @nodes; # nodelist
+my @ctx;   # curstack
+
+sub out {
+   $ctx[-1]{out} .= join "", @_;
 }
 
-while (<>) {
-   if (/^\@c INCLUDE-(\S+) (\S+)/) {
-      my $type = $1;
-      my $name = $2;
-      my $path = $2;
-
-      $name =~ s/\.(\d)$/($1)/;
-
-      print "\@chapter $name\n\n";
-
-      if ($type eq "POD") {
-         open my $x, "<$path.pod" or die "$path.pod: $!";
-         my $data = do { local $/; <$x> };
-
-         my $pod = new Pod::Tree;
-         $pod->load_string($data);
-      
-         my $walker; $walker = sub {
-            my $n = $_[0];
-            if ($n->is_code) {
-               # nop
-            } elsif ($n->is_link) {
-               my $target = $n->get_target;
-               my $page    = $target->get_page;
-               my $section = $target->get_section;
-               
-               #print "<b>";
-               $walker->($_) for @{$n->get_children};
-               #print "</b>";
-            } elsif ($n->is_text) {
-               print escape_texi $n->get_text;
-            } elsif ($n->is_verbatim) {
-               example $n->get_text;
-            } elsif ($n->is_sequence) {
-               if ($n->get_letter eq "C") {
-                  print "\@t{";
-                  $walker->($_) for @{$n->get_children};
-                  print "}";
-               } elsif ($n->get_letter eq "B") {
-                  print "\@strong{";
-                  $walker->($_) for @{$n->get_children};
-                  print "}";
-               } elsif ($n->get_letter eq "I" or $n->get_letter eq "F") {
-                  print "\@emph{";
-                  $walker->($_) for @{$n->get_children};
-                  print "}";
-               } else {
-                  # S would mean to use nbsp
-                  $walker->($_) for @{$n->get_children};
-               }
-            } elsif ($n->is_command) {
-               if ($n->is_c_head1) {
-                  print "\n\@section ";
-                  $walker->($_) for @{$n->get_children};
-                  print "\n";
-               } elsif ($n->is_c_head2) {
-                  print "\n\n\@subsection ";
-                  $walker->($_) for @{$n->get_children};
-                  print "\n";
-               } else {
-                  # nop?
-               }
-            } elsif ($n->is_ordinary) {
-               $walker->($_) for @{$n->get_children};
-               print "\@refill\n";
-            } elsif ($n->is_root) {
-               $walker->($_) for @{$n->get_children};
-            } elsif ($n->is_list) {
-               print "\n\n\@itemize\n";
-               $walker->($_) for @{$n->get_children};
-               print "\@end itemize\n\n";
-            } elsif ($n->is_item) {
-               print "\n\n\@item\n";
-                  print "\@b{";
-                  $walker->($_) for @{$n->get_children};
-                  print "}\n\n";
-               $walker->($_) for @{$n->get_siblings};
-            } else {
-               die "UNKNOWN NODE $_[0]{type}<br/>";
-               $walker->($_) for @{$n->get_children};
+sub TEX::view_seq_code { "\@t{$_[1]}" }
+sub TEX::view_seq_bold { "\@strong{$_[1]}" }
+sub TEX::view_seq_italic { "\@emph{$_[1]}" }
+
+sub TEX::view_seq_space { escape_texi $_[1] }
+sub TEX::view_seq_text { escape_texi $_[1] }
+
+sub TEX::view_seq_link { $_[1] }
+sub TEX::view_seq_index {
+   "\n\@cindex $_[1]\n$_[1]"
+}
+
+*TXT::view_seq_code =
+*TXT::view_seq_bold =
+*TXT::view_seq_italic =
+*TXT::view_seq_space =
+*TXT::view_seq_text =
+*TXT::view_seq_link =
+*TXT::view_seq_index = sub { $_[1] };
+
+my %ignore = (
+   "SEE ALSO" => 1,
+   "AUTHOR"   => 1,
+);
+
+sub parse_pod {
+   my ($data) = @_;
+   local $out;
+
+   local $Pod::POM::DEFAULT_VIEW = TEX::;
+
+   my $parser = new Pod::POM;
+   my $pod = $parser->parse_text ($data)
+      or die;
+
+   my $walker; $walker = sub {
+      my $n = $_[0];
+      my $t = $n->type;
+
+      if ($t eq "text") {
+         out $n->text . "\n\@refill\n";
+
+      } elsif ($t eq "pod") {
+         $walker->($_) for $n->content;
+
+      } elsif ($t eq "verbatim") {
+         out example $n->text;
+
+      } elsif ($t eq "head1") {
+
+         return if $ignore{$n->title};
+         
+         out "\n\@section " . $n->title . "\n";
+         $walker->($_) for $n->content;
+         out "\n";
+
+      } elsif ($t eq "head2") {
+         out "\n\n\@subsection " . $n->title . "\n";
+         $walker->($_) for $n->content;
+
+      } elsif ($t eq "over") {
+         out "\n\n\@itemize\n";
+         $walker->($_) for $n->content;
+         out "\@end itemize\n\n";
+
+      } elsif ($t eq "item") {
+         out "\n\n\@item\n\@b{" . $n->title . "}\n\n";
+
+         if ($n->title->present (TXT::) =~ /^\s*([a-zA-Z0-9\-\_]+)\s*=/) {
+            out "\@cindex $1\n";
+         }
+         $walker->($_) for $n->content;
+
+      } elsif ($t eq "begin") {
+         local $Pod::POM::DEFAULT_VIEW = Pod::POM::View::Pod;
+         my $format = $n->format;
+
+         if ($format =~ /texinfo\s+header/) {
+            $header = $n->content;
+         } elsif ($format =~ /texinfo\s+footer/) {
+            $footer = $n->content;
+         } else {
+            out $n->content;
+         }
+
+      } elsif ($t eq "for") {
+         my $text = $n->text;
+
+         if ($text =~ /^menu-begin/) {
+            out "\n\@menu\n";
+
+            push @ctx, {}; # dummy node
+
+         } elsif ($text =~ /^menu-item (.*?)::\s+(.*)/) {
+            my ($name, $desc) = ($1, $2);
+
+            push @{ $ctx[-2]{menu} }, [$name, $desc];
+            $ctx[-2]{width} = length $name if $ctx[-2]{width} < length $name;
+
+            my $ctx = {
+               name => $name,
+               up   => $ctx[-2]{name},
+            };
+            push @nodes, $ctx;
+            $ctx[-1] = $ctx;
+
+         } elsif ($text =~ /^menu-end/) {
+            pop @ctx;
+
+            for (@{ $ctx[-1]{menu} }) {
+               out sprintf "* %-*s %s\n", $ctx[-1]{width} + 2, "$_->[0]::", $_->[1];
             }
-         };
-      
-         $walker->($pod->get_root);
-      } elsif ($type eq "TEXT") {
-         open my $x, "<$path" or die "$path: $!";
-         my $data = do { local $/; <$x> };
-
-         print $data;
-      } elsif ($type eq "EXAMPLE") {
-         open my $x, "<$path" or die "$path: $!";
-         my $data = do { local $/; <$x> };
 
-         example $data;
+            out "\@end menu\n";
+
+         } elsif ($text =~ /^include (\S+) (.*)/) {
+            my ($type, $path) = ($1, $2);
+
+            open my $x, "<$path" or die "$path: $!";
+            my $data = do { local $/; <$x> };
+
+            if ($type eq "pod") {
+               out parse_pod ($data);
+            } elsif ($type eq "text") {
+               out $data;
+            } elsif ($type eq "example") {
+               out example $data;
+            }
+
+         } else {
+            die "UNKNOWN for command <$text>\n";
+         }
+
+      } else {
+         die "UNKNOWN NODE $t\n";
       }
-   } else {
-      print;
-   }
+   };
+
+   $walker->($pod);
+}
+
+@ctx = @nodes = {
+   up   => "(dir)",
+   name => "Top",
+};
+
+parse_pod do { local $/; <> };
+
+print $header;
+
+for (0 .. $#nodes) {
+   my $node = $nodes[$_];
+   my $prev = $_ > 0 ? $nodes[$_-1] : undef;
+   my $next = $nodes[$_+1];
+   my $chapter = $node->{name} eq "Top" ? "Introduction" : $node->{name};
+
+   print "\@node $node->{name},$next->{name},$prev->{name},$node->{up}\n\n",
+         "\@chapter $chapter\n",
+         "$node->{out}\n\n";
 }
 
+print $footer;
+