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# frozen_string_literal: true
module Kramdown
module Converter
# Overrides the base Kramdown converter to add any special
# behaviour for CommonMark.
#
# Currently we support an option `html_tables` that outputs
# an HTML table instead of a Markdown table. This is to
# support possibly being given complex tables, such as from ADF.
#
# Note: this is only an initial implementation. Currently don't
# strip out IALs or other specific kramdown syntax.
class Commonmark < ::Kramdown::Converter::Kramdown
# replaces the ^ used in kramdown. This forces the current
# block to end, so that a different list or codeblock can be
# started. https://kramdown.gettalong.org/syntax.html#eob-marker
END_OF_BLOCK = '<!-- -->'
def convert(el, opts = { indent: 0 })
res = super
if [:ul, :dl, :ol, :codeblock].include?(el.type) && opts[:next] &&
([el.type, :codeblock].include?(opts[:next].type) ||
(opts[:next].type == :blank && opts[:nnext] &&
[el.type, :codeblock].include?(opts[:nnext].type)))
# replace the end of block character
res.sub!(/\^\n\n\z/m, "#{END_OF_BLOCK}\n\n")
end
res
end
def convert_codeblock(el, _opts)
# Although tildes are supported in CommonMark, backticks are more common
"```#{el.options[:lang]}\n" +
el.value.split("\n").map { |l| l.empty? ? "" : l.to_s }.join("\n") +
"\n```\n\n"
end
def convert_li(el, opts)
res = super
if el.children.first && el.children.first.type == :p && !el.children.first.options[:transparent]
if el.children.size == 1 && @stack.last.children.last == el &&
(@stack.last.children.any? { |c| c.children.first.type != :p } || @stack.last.children.size == 1)
# replace the end of block character
res.sub!(/\^\n\z/m, "#{END_OF_BLOCK}\n")
end
end
res
end
def convert_table(el, opts)
return super unless @options[:html_tables]
opts[:alignment] = el.options[:alignment]
result = inner(el, opts)
"<table>\n#{result}</table>\n\n"
end
def convert_thead(el, opts)
return super unless @options[:html_tables]
"<thead>\n#{inner(el, opts)}</thead>\n"
end
def convert_tbody(el, opts)
return super unless @options[:html_tables]
"<tbody>\n#{inner(el, opts)}</tbody>\n"
end
def convert_tfoot(el, opts)
return super unless @options[:html_tables]
"<tfoot>\n#{inner(el, opts)}</tfoot>\n"
end
def convert_tr(el, opts)
return super unless @options[:html_tables]
"<tr>\n#{el.children.map { |c| convert(c, opts) }.join}</tr>\n"
end
def convert_td(el, opts)
return super unless @options[:html_tables]
# We need to add two linefeeds in order for any inner text to
# be processed as markdown. The HTML block must be "closed",
# as referenced in the CommonMark spec
# @see https://spec.commonmark.org/0.29/#html-blocks
"<td>\n\n#{inner(el, opts)}</td>\n"
end
def convert_th(el, opts)
return super unless @options[:html_tables]
# We need to add two linefeeds in order for any inner text to
# be processed as markdown. The HTML block must be "closed",
# as referenced in the CommonMark spec
# @see https://spec.commonmark.org/0.29/#html-blocks
"<th>\n\n#{inner(el, opts)}</th>\n"
end
end
end
end
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