# frozen_string_literal: true ## # Outputs RDoc markup with hot backspace action! You will probably need a # pager to use this output format. # # This formatter won't work on 1.8.6 because it lacks String#chars. class RDoc::Markup::ToBs < RDoc::Markup::ToRdoc ## # Returns a new ToBs that is ready for hot backspace action! def initialize(markup = nil) super @in_b = false @in_em = false end ## # Sets a flag that is picked up by #annotate to do the right thing in # #convert_string def init_tags add_tag :BOLD, '+b', '-b' add_tag :EM, '+_', '-_' add_tag :TT, '', '' # we need in_tt information maintained end ## # Makes heading text bold. def accept_heading(heading) use_prefix or @res << ' ' * @indent @res << @headings[heading.level][0] @in_b = true @res << attributes(heading.text) @in_b = false @res << @headings[heading.level][1] @res << "\n" end ## # Prepares the visitor for consuming +list_item+ def accept_list_item_start(list_item) type = @list_type.last case type when :NOTE, :LABEL then bullets = Array(list_item.label).map do |label| attributes(label).strip end.join "\n" bullets << ":\n" unless bullets.empty? @prefix = ' ' * @indent @indent += 2 @prefix << bullets + (' ' * @indent) else bullet = type == :BULLET ? '*' : @list_index.last.to_s + '.' @prefix = (' ' * @indent) + bullet.ljust(bullet.length + 1) width = bullet.length + 1 @indent += width end end def calculate_text_width(text) text.gsub(/_\x08/, '').gsub(/\x08./, '').size end ## # Turns on or off regexp handling for +convert_string+ def annotate(tag) case tag when '+b' then @in_b = true when '-b' then @in_b = false when '+_' then @in_em = true when '-_' then @in_em = false end '' end ## # Calls convert_string on the result of convert_regexp_handling def convert_regexp_handling(target) convert_string super end ## # Adds bold or underline mixed with backspaces def convert_string(string) return string unless @in_b or @in_em chars = if @in_b then string.chars.map do |char| "#{char}\b#{char}" end elsif @in_em then string.chars.map do |char| "_\b#{char}" end end chars.join end end