port bw style from Pygments to Rouge

lib/rouge/themes/bw.rb

@@ -0,0 +1,41 @@
+# -*- coding: utf-8 -*- #
+# frozen_string_literal: true
+
+module Rouge
+  module Themes
+    # A port of the bw style from Pygments.
+    # See https://bitbucket.org/birkenfeld/pygments-main/src/default/pygments/styles/bw.py
+    class BlackWhiteTheme < CSSTheme
+      name 'bw'
+
+      style Text,                        :fg => '#000000', :bg => '#ffffff'
+
+      style Comment,                     :italic => true
+      style Comment::Preproc,            :italic => false
+
+      style Keyword,                     :bold => true
+      style Keyword::Pseudo,             :bold => false
+      style Keyword::Type,               :bold => false
+
+      style Operator,                    :bold => true
+
+      style Name::Class,                 :bold => true
+      style Name::Namespace,             :bold => true
+      style Name::Exception,             :bold => true
+      style Name::Entity,                :bold => true
+      style Name::Tag,                   :bold => true
+
+      style Literal::String,             :italic => true
+      style Literal::String::Interpol,   :bold => true
+      style Literal::String::Escape,     :bold => true
+
+      style Generic::Heading,            :bold => true
+      style Generic::Subheading,         :bold => true
+      style Generic::Emph,               :italic => true
+      style Generic::Strong,             :bold => true
+      style Generic::Prompt,             :bold => true
+
+      style Error,                       :fg => '#FF0000'
+    end
+  end
+end