protected function processDefListItems($list_str)
{
#
# Process the contents of a single definition list, splitting it
# into individual term and definition list items.
#
$less_than_tab = $this->tab_width - 1;
# trim trailing blank lines:
$list_str = preg_replace("/\n{2,}\\z/", "\n", $list_str);
# Process definition terms.
$list_str = preg_replace_callback('{
(?>\\A\\n?|\\n\\n+) # leading line
( # definition terms = $1
[ ]{0,' . $less_than_tab . '} # leading whitespace
(?!\\:[ ]|[ ]) # negative lookahead for a definition
# mark (colon) or more whitespace.
(?> \\S.* \\n)+? # actual term (not whitespace).
)
(?=\\n?[ ]{0,3}:[ ]) # lookahead for following line feed
# with a definition mark.
}xm', array($this, '_processDefListItems_callback_dt'), $list_str);
# Process actual definitions.
$list_str = preg_replace_callback('{
\\n(\\n+)? # leading line = $1
( # marker space = $2
[ ]{0,' . $less_than_tab . '} # whitespace before colon
\\:[ ]+ # definition mark (colon)
)
((?s:.+?)) # definition text = $3
(?= \\n+ # stop at next definition mark,
(?: # next term or end of text
[ ]{0,' . $less_than_tab . '} \\:[ ] |
<dt> | \\z
)
)
}xm', array($this, '_processDefListItems_callback_dd'), $list_str);
return $list_str;
}
