apply workaround to get InlineLinkRx to work as expected in Asciidoctor.js

1 files changed, 6 insertions, 1 deletions

diff --git a/lib/asciidoctor/rx.rb b/lib/asciidoctor/rx.rb
index f7293636..5ba6ba1f 100644
--- a/lib/asciidoctor/rx.rb
+++ b/lib/asciidoctor/rx.rb
@@ -520,7 +520,12 @@ module Asciidoctor
   #   "https://github.com[]"
   #   (https://github.com) <= parenthesis not included in autolink
   #
-  InlineLinkRx = %r((^|link:|#{CG_BLANK}|\\?&lt;()|[>\(\)\[\];"'])(\\?(?:https?|file|ftp|irc)://)(?:([^\s\[\]]+)\[(|#{CC_ALL}*?[^\\])\]|\2([^\s]*?)&gt;|([^\s\[\]<]*([^\s,.?!\[\]<\)]))))m
+  if RUBY_ENGINE == 'opal'
+    # NOTE In JavaScript, a back reference succeeds if not set; invert the logic to give it a match to refute
+    InlineLinkRx = %r((^|link:|#{CG_BLANK}|\\?&lt;(?=\\?(?:https?|file|ftp|irc)(:))|[>\(\)\[\];"'])(\\?(?:https?|file|ftp|irc)://)(?:([^\s\[\]]+)\[(|#{CC_ALL}*?[^\\])\]|(?!\2)([^\s]*?)&gt;|([^\s\[\]<]*([^\s,.?!\[\]<\)]))))
+  else
+    InlineLinkRx = %r((^|link:|#{CG_BLANK}|\\?&lt;()|[>\(\)\[\];"'])(\\?(?:https?|file|ftp|irc)://)(?:([^\s\[\]]+)\[(|#{CC_ALL}*?[^\\])\]|\2([^\s]*?)&gt;|([^\s\[\]<]*([^\s,.?!\[\]<\)]))))m
+  end
 
   # Match a link or e-mail inline macro.
   #