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