diff options
Diffstat (limited to 'lib/banzai/filter/syntax_highlight_filter.rb')
| -rw-r--r-- | lib/banzai/filter/syntax_highlight_filter.rb | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/lib/banzai/filter/syntax_highlight_filter.rb b/lib/banzai/filter/syntax_highlight_filter.rb index 9ffde52b5f2..fe56f9a1e33 100644 --- a/lib/banzai/filter/syntax_highlight_filter.rb +++ b/lib/banzai/filter/syntax_highlight_filter.rb @@ -8,6 +8,11 @@ module Banzai # HTML Filter to highlight fenced code blocks # class SyntaxHighlightFilter < HTML::Pipeline::Filter + include OutputSafety + + PARAMS_DELIMITER = ':'.freeze + LANG_PARAMS_ATTR = 'data-lang-params'.freeze + def call doc.search('pre > code').each do |node| highlight_node(node) @@ -18,7 +23,7 @@ module Banzai def highlight_node(node) css_classes = +'code highlight js-syntax-highlight' - lang = node.attr('lang') + lang, lang_params = parse_lang_params(node.attr('lang')) retried = false if use_rouge?(lang) @@ -46,7 +51,10 @@ module Banzai retry end - highlighted = %(<pre class="#{css_classes}" lang="#{language}" v-pre="true"><code>#{code}</code></pre>) + highlighted = %(<pre class="#{css_classes}" + lang="#{language}" + #{lang_params} + v-pre="true"><code>#{code}</code></pre>) # Extracted to a method to measure it replace_parent_pre_element(node, highlighted) @@ -54,6 +62,15 @@ module Banzai private + def parse_lang_params(language) + return unless language + + lang, params = language.split(PARAMS_DELIMITER, 2) + formatted_params = %(#{LANG_PARAMS_ATTR}="#{escape_once(params)}") if params + + [lang, formatted_params] + end + # Separate method so it can be instrumented. def lex(lexer, code) lexer.lex(code) |