summaryrefslogtreecommitdiff
path: root/lib/banzai/filter/color_filter.rb
diff options
context:
space:
mode:
Diffstat (limited to 'lib/banzai/filter/color_filter.rb')
-rw-r--r--lib/banzai/filter/color_filter.rb31
1 files changed, 31 insertions, 0 deletions
diff --git a/lib/banzai/filter/color_filter.rb b/lib/banzai/filter/color_filter.rb
new file mode 100644
index 00000000000..6ab29ac281f
--- /dev/null
+++ b/lib/banzai/filter/color_filter.rb
@@ -0,0 +1,31 @@
+module Banzai
+ module Filter
+ # HTML filter that renders `color` followed by a color "chip".
+ #
+ class ColorFilter < HTML::Pipeline::Filter
+ COLOR_CHIP_CLASS = 'gfm-color_chip'.freeze
+
+ def call
+ doc.css('code').each do |node|
+ color = ColorParser.parse(node.content)
+ node << color_chip(color) if color
+ end
+
+ doc
+ end
+
+ private
+
+ def color_chip(color)
+ checkerboard = doc.document.create_element('span', class: COLOR_CHIP_CLASS)
+ chip = doc.document.create_element('span', style: inline_styles(color: color))
+
+ checkerboard << chip
+ end
+
+ def inline_styles(color:)
+ "background-color: #{color};"
+ end
+ end
+ end
+end