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# SPDX-License-Identifier: MIT
require 'asciidoctor/extensions' unless RUBY_ENGINE == 'opal'
include Asciidoctor
# An extension that converts a list of lines to an inline Oxford comma-separated list.
#
# Usage
#
# [commaize]
# --
# item1
# item2
# item3
# --
#
class CommaizeBlock < Extensions::BlockProcessor
use_dsl
named :commaize
on_contexts :paragraph, :open
# XXX What's the difference between text, raw, simple, verbatim, etc?
parse_content_as :simple
def process(parent, reader, attrs)
lines = reader.lines
sort = attrs.fetch('sort', 'true') == 'true'
lines = lines.reject(&:empty?)
lines = lines.map(&:strip)
lines = lines.sort_by(&:downcase) if sort
if lines.length < 2
create_paragraph parent, lines, attrs
elsif lines.length == 2
create_paragraph parent, lines.join(" and "), attrs
else
commaized = lines[0..-2].join(", ")
commaized << ", and " + lines[-1]
create_paragraph parent, commaized, attrs
end
end
end
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