78 lines
2.1 KiB
Ruby
78 lines
2.1 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
module Gitlab
|
|
class Highlight
|
|
TIMEOUT_BACKGROUND = 30.seconds
|
|
TIMEOUT_FOREGROUND = 3.seconds
|
|
MAXIMUM_TEXT_HIGHLIGHT_SIZE = 1.megabyte
|
|
|
|
def self.highlight(blob_name, blob_content, language: nil, plain: false)
|
|
new(blob_name, blob_content, language: language)
|
|
.highlight(blob_content, continue: false, plain: plain)
|
|
end
|
|
|
|
attr_reader :blob_name
|
|
|
|
def initialize(blob_name, blob_content, language: nil)
|
|
@formatter = Rouge::Formatters::HTMLGitlab
|
|
@language = language
|
|
@blob_name = blob_name
|
|
@blob_content = blob_content
|
|
end
|
|
|
|
def highlight(text, continue: true, plain: false)
|
|
plain ||= text.length > MAXIMUM_TEXT_HIGHLIGHT_SIZE
|
|
|
|
highlighted_text = highlight_text(text, continue: continue, plain: plain)
|
|
highlighted_text = link_dependencies(text, highlighted_text) if blob_name
|
|
highlighted_text
|
|
end
|
|
|
|
def lexer
|
|
@lexer ||= custom_language || begin
|
|
Rouge::Lexer.guess(filename: @blob_name, source: @blob_content).new
|
|
rescue Rouge::Guesser::Ambiguous => e
|
|
e.alternatives.sort_by(&:tag).first
|
|
end
|
|
end
|
|
|
|
private
|
|
|
|
def custom_language
|
|
return unless @language
|
|
|
|
Rouge::Lexer.find_fancy(@language)
|
|
end
|
|
|
|
def highlight_text(text, continue: true, plain: false)
|
|
if plain
|
|
highlight_plain(text)
|
|
else
|
|
highlight_rich(text, continue: continue)
|
|
end
|
|
end
|
|
|
|
def highlight_plain(text)
|
|
@formatter.format(Rouge::Lexers::PlainText.lex(text)).html_safe
|
|
end
|
|
|
|
def highlight_rich(text, continue: true)
|
|
tag = lexer.tag
|
|
tokens = lexer.lex(text, continue: continue)
|
|
Timeout.timeout(timeout_time) { @formatter.format(tokens, tag: tag).html_safe }
|
|
rescue Timeout::Error => e
|
|
Gitlab::ErrorTracking.track_and_raise_for_dev_exception(e)
|
|
highlight_plain(text)
|
|
rescue
|
|
highlight_plain(text)
|
|
end
|
|
|
|
def timeout_time
|
|
Sidekiq.server? ? TIMEOUT_BACKGROUND : TIMEOUT_FOREGROUND
|
|
end
|
|
|
|
def link_dependencies(text, highlighted_text)
|
|
Gitlab::DependencyLinker.link(blob_name, text, highlighted_text)
|
|
end
|
|
end
|
|
end
|