Class: RDoc::Markup::ToAnsi

Inherits:
ToRdoc show all
Defined in:
lib/rdoc/markup/to_ansi.rb

Overview

Outputs RDoc markup with vibrant ANSI color!

Instance Attribute Summary

Attributes inherited from ToRdoc

#indent, #list_index, #list_type, #list_width, #prefix, #res, #width

Instance Method Summary collapse

Methods inherited from ToRdoc

#accept_blank_line, #accept_block_quote, #accept_heading, #accept_indented_paragraph, #accept_list_end, #accept_list_start, #accept_paragraph, #accept_raw, #accept_rule, #accept_verbatim, #attributes, #end_accepting, #handle_special_HARD_BREAK, #handle_special_SUPPRESSED_CROSSREF, #use_prefix, #wrap

Methods inherited from Formatter

#accept_document, #add_special_RDOCLINK, #add_special_TIDYLINK, #add_tag, #annotate, #convert, #convert_flow, #convert_special, #convert_string, gen_relative_url, #ignore, #in_tt?, #off_tags, #on_tags, #parse_url, #tt?

Constructor Details

#initialize(markup = nil) ⇒ ToAnsi

Creates a new ToAnsi visitor that is ready to output vibrant ANSI color!



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# File 'lib/rdoc/markup/to_ansi.rb', line 9

def initialize markup = nil
  super

  @headings.clear
  @headings[1] = ["\e[1;32m", "\e[m"] # bold
  @headings[2] = ["\e[4;32m", "\e[m"] # underline
  @headings[3] = ["\e[32m",   "\e[m"] # just green
end

Instance Method Details

#accept_list_item_end(list_item) ⇒ Object

Overrides indent width to ensure output lines up correctly.



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# File 'lib/rdoc/markup/to_ansi.rb', line 30

def accept_list_item_end list_item
  width = case @list_type.last
          when :BULLET then
            2
          when :NOTE, :LABEL then
            if @prefix then
              @res << @prefix.strip
              @prefix = nil
            end

            @res << "\n" unless res.length == 1
            2
          else
            bullet = @list_index.last.to_s
            @list_index[-1] = @list_index.last.succ
            bullet.length + 2
          end

  @indent -= width
end

#accept_list_item_start(list_item) ⇒ Object

Adds coloring to note and label list items



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# File 'lib/rdoc/markup/to_ansi.rb', line 54

def accept_list_item_start list_item
  bullet = case @list_type.last
           when :BULLET then
             '*'
           when :NOTE, :LABEL then
             labels = Array(list_item.label).map do |label|
               attributes(label).strip
             end.join "\n"

             labels << ":\n" unless labels.empty?

             labels
           else
             @list_index.last.to_s + '.'
           end

  case @list_type.last
  when :NOTE, :LABEL then
    @indent += 2
    @prefix = bullet + (' ' * @indent)
  else
    @prefix = (' ' * @indent) + bullet.ljust(bullet.length + 1)

    width = bullet.gsub(/\e\[[\d;]*m/, '').length + 1

    @indent += width
  end
end

#init_tags ⇒ Object

Maps attributes to ANSI sequences



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# File 'lib/rdoc/markup/to_ansi.rb', line 21

def init_tags
  add_tag :BOLD, "\e[1m", "\e[m"
  add_tag :TT,   "\e[7m", "\e[m"
  add_tag :EM,   "\e[4m", "\e[m"
end

#start_accepting ⇒ Object

Starts accepting with a reset screen



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# File 'lib/rdoc/markup/to_ansi.rb', line 86

def start_accepting
  super

  @res = ["\e[0m"]
end