1 # Nick's web site: xhtml_compat filter. Perform fixups to improve
2 # XHTML compatibility with various user agents.
4 # Copyright © 2019-2021 Nick Bowler
6 # This program is free software: you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation, either version 3 of the License, or
9 # (at your option) any later version.
11 # This program is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this program. If not, see <https://www.gnu.org/licenses/>.
19 class XhtmlCompatFilter < Nanoc::Filter
20 identifier :xhtml_compat
22 def run(content, params = {})
23 # Old versions of Netscape get confused by <hr/> but have no problem
24 # with <hr />, so avoid that by adding spaces to such elements.
25 text = content.gsub(/([^[:space:]])\/>/m, '\1 />');
27 # Even older versions of Netscape interpret any script as Javascript,
28 # which causes major problems with the CDATA hack; solve that by making
29 # the whole thing look like a Javascript comment.
30 text.gsub!("<![CDATA[]]x><!--]]>", '/*\&')
31 text.gsub!("<![CDATA[-->]]>", '\&*/')
33 # Delete any zero-width word joiners added for XSLT processing.
34 return text.delete "\u2060"