[l2h] Avoiding title collisions when using $LONG_TITLES

[Julius Smith]

If you set $LONG_TITLES in your ~/.latex2html-init file, you may have 
encountered the awful problem of file-name collisions.  For example, if two 
chapters of a document contain sections entitled "Introduction", only the 
last one will "exist", and navigation to "Introduction" in the first 
chapter will proceed to that section of the later chapter.  This is of 
course extremely confusing to the reader.

Below is a simple method of avoiding this problem by overriding the 
&make_name() subroutine in your init file.   This is also where you can 
remove the 32-character file-name length limit to provide nicer looking 
generated section URLs (when they are not intended to be typed manually or 
accessed in ancient browsers).

In ~/.latex2html-init :

my %title_seen = ();
sub make_name {
     ...
     if ($title) {
	#ensure no more than 32 characters, including .html extension
#jos	$title =~ s/^(.{1,27}).*$/$1/;
	while ($title_seen{$title}) {
	    $title .= '_I';
	}
	$title_seen{$title}++;
     	++$OUT_NODE;
	join("", ${PREFIX}, $title, $EXTN);
     } else {
     # Remove 0's from the end of $packed_curr_sec_id
     ...
}