Sha256: 2a4688ea9f9cf4a224f276bb39cdca7a5e4cb357fbd6c5a368584591533dc660
Contents?: true
Size: 1.2 KB
Versions: 8
Compression:
Stored size: 1.2 KB
Contents
begin
require "linguist"
rescue LoadError => _
raise HTML::Pipeline::MissingDependencyError, "Missing dependency 'github-linguist' for SyntaxHighlightFilter. See README.md for details."
end
module HTML
class Pipeline
# HTML Filter that syntax highlights code blocks wrapped
# in <pre lang="...">.
class SyntaxHighlightFilter < Filter
def call
doc.search('pre').each do |node|
default = context[:highlight] && context[:highlight].to_s
next unless lang = node['lang'] || default
next unless lexer = lexer_for(lang)
text = node.inner_text
html = highlight_with_timeout_handling(lexer, text)
next if html.nil?
if (node = node.replace(html).first)
klass = node["class"]
klass = [klass, "highlight-#{lang}"].compact.join " "
node["class"] = klass
end
end
doc
end
def highlight_with_timeout_handling(lexer, text)
lexer.highlight(text)
rescue Timeout::Error => boom
nil
end
def lexer_for(lang)
(Linguist::Language[lang] && Linguist::Language[lang].lexer) || Pygments::Lexer[lang]
end
end
end
end
Version data entries
8 entries across 8 versions & 1 rubygems