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# frozen_string_literal: true
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
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