Add syntax highlighting to diff view. #3945

1 files changed, 20 insertions, 0 deletions

diff --git a/lib/rouge/lexers/gitlab_diff.rb b/lib/rouge/lexers/gitlab_diff.rb
new file mode 100644
index 00000000000..e136d47df00
--- /dev/null
+++ b/lib/rouge/lexers/gitlab_diff.rb
@@ -0,0 +1,20 @@
+Rouge::Token::Tokens.token(:InlineDiff, 'idiff')
+
+module Rouge
+  module Lexers
+    class GitlabDiff < RegexLexer
+      title "GitLab Diff"
+      tag 'gitlab_diff'
+
+      state :root do
+        rule %r{<span class='idiff'>(.*?)</span>} do |match|
+          token InlineDiff, match[1]
+        end
+
+        rule /(?:(?!<span).)*/ do
+          delegate option(:parent_lexer)
+        end
+      end
+    end
+  end
+end