blob: 9f468f98aebd5bad3a9945c9391a5a993026c0ef (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
require 'html/pipeline/filter'
require 'rouge/plugins/redcarpet'
module Gitlab
module Markdown
# HTML Filter to highlight fenced code blocks
#
class SyntaxHighlightFilter < HTML::Pipeline::Filter
include Rouge::Plugins::Redcarpet
def call
doc.search('pre > code').each do |node|
highlight_node(node)
end
doc
end
def highlight_node(node)
language = node.attr('class')
code = node.text
highlighted = block_code(code, language)
# Replace the parent `pre` element with the entire highlighted block
node.parent.replace(highlighted)
end
private
# Override Rouge::Plugins::Redcarpet#rouge_formatter
def rouge_formatter(lexer)
Rouge::Formatters::HTMLGitlab.new(
cssclass: "code highlight js-syntax-highlight #{lexer.tag}")
end
end
end
end
|