module Gitlab class Highlight def self.highlight(blob_name, blob_content, repository: nil, nowrap: true, plain: false) new(blob_name, blob_content, nowrap: nowrap, repository: repository). highlight(blob_content, continue: false, plain: plain) end def self.highlight_lines(repository, ref, file_name) blob = repository.blob_at(ref, file_name) return [] unless blob blob.load_all_data!(repository) highlight(file_name, blob.data, repository: repository).lines.map!(&:html_safe) end attr_reader :lexer def initialize(blob_name, blob_content, repository: nil, nowrap: true) @blob_name = blob_name @blob_content = blob_content @repository = repository @formatter = rouge_formatter(nowrap: nowrap) @lexer = custom_language || begin Rouge::Lexer.guess(filename: blob_name, source: blob_content).new rescue Rouge::Lexer::AmbiguousGuess => e e.alternatives.sort_by(&:tag).first end end def highlight(text, continue: true, plain: false) if plain @formatter.format(Rouge::Lexers::PlainText.lex(text)).html_safe else @formatter.format(@lexer.lex(text, continue: continue)).html_safe end rescue @formatter.format(Rouge::Lexers::PlainText.lex(text)).html_safe end private def custom_language language_name = @repository && @repository.gitattribute(@blob_name, 'gitlab-language') return nil unless language_name Rouge::Lexer.find_fancy(language_name) end def rouge_formatter(options = {}) options = options.reverse_merge( nowrap: true, cssclass: 'code highlight', lineanchors: true, lineanchorsid: 'LC' ) Rouge::Formatters::HTMLGitlab.new(options) end end end