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module ReverseMarkdown
module Converters
class Text < Base
def convert(node, options = {})
if node.text.strip.empty?
treat_empty(node)
else
treat_text(node)
end
end
private
def treat_empty(node)
parent = node.parent.name.to_sym
if [:ol, :ul].include?(parent) # Otherwise the identation is broken
''
elsif node.text == ' ' # Regular whitespace text node
' '
else
''
end
end
def treat_text(node)
text = node.text
text = preserve_nbsp(text)
text = remove_border_newlines(text)
text = remove_inner_newlines(text)
text = escape_keychars(text)
text = preserve_keychars_within_backticks(text)
text = preserve_tags(text)
text
end
def preserve_nbsp(text)
text.gsub(/\u00A0/, " ")
end
def preserve_tags(text)
text.gsub(/[<>]/, '>' => '\>', '<' => '\<')
end
def remove_border_newlines(text)
text.gsub(/\A\n+/, '').gsub(/\n+\z/, '')
end
def remove_inner_newlines(text)
text.tr("\r\n\t", ' ').squeeze(' ')
end
def preserve_keychars_within_backticks(text)
text.gsub(/`.*?`/) do |match|
match.gsub('\_', '_').gsub('\*', '*')
end
end
end
register :text, Text.new
end
end
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