diff options
Diffstat (limited to 'lib/banzai/filter/syntax_highlight_filter.rb')
| -rw-r--r-- | lib/banzai/filter/syntax_highlight_filter.rb | 34 |
1 files changed, 22 insertions, 12 deletions
diff --git a/lib/banzai/filter/syntax_highlight_filter.rb b/lib/banzai/filter/syntax_highlight_filter.rb index a79a0154846..0ac7e231b5b 100644 --- a/lib/banzai/filter/syntax_highlight_filter.rb +++ b/lib/banzai/filter/syntax_highlight_filter.rb @@ -14,23 +14,33 @@ module Banzai end def highlight_node(node) - code = node.text css_classes = 'code highlight js-syntax-highlight' - language = node.attr('lang') + lang = node.attr('lang') + retried = false - if use_rouge?(language) - lexer = lexer_for(language) + if use_rouge?(lang) + lexer = lexer_for(lang) language = lexer.tag + else + lexer = Rouge::Lexers::PlainText.new + language = lang + end + + begin + code = Rouge::Formatters::HTMLGitlab.format(lex(lexer, node.text), tag: language) + css_classes << " #{language}" if language + rescue + # Gracefully handle syntax highlighter bugs/errors to ensure users can + # still access an issue/comment/etc. First, retry with the plain text + # filter. If that fails, then just skip this entirely, but that would + # be a pretty bad upstream bug. + return if retried - begin - code = Rouge::Formatters::HTMLGitlab.format(lex(lexer, code), tag: language) - css_classes << " #{language}" - rescue - # Gracefully handle syntax highlighter bugs/errors to ensure - # users can still access an issue/comment/etc. + language = nil + lexer = Rouge::Lexers::PlainText.new + retried = true - language = nil - end + retry end highlighted = %(<pre class="#{css_classes}" lang="#{language}" v-pre="true"><code>#{code}</code></pre>) |