class RDoc::Markup::Attributes

We manage a set of attributes. Each attribute has a symbol name and a bit value.

Attributes

special[R]

The special attribute type. See RDoc::Markup#add_special

Public Class Methods

new() click to toggle source

Creates a new attributes set.

# File lib/rdoc/markup/attributes.rb, line 16
def initialize
  @special = 1

  @name_to_bitmap = [
    [:_SPECIAL_, @special],
  ]

  @next_bitmap = @special << 1
end

Public Instance Methods

as_string(bitmap) click to toggle source

Returns a string representation of bitmap

# File lib/rdoc/markup/attributes.rb, line 46
def as_string bitmap
  return 'none' if bitmap.zero?
  res = []

  @name_to_bitmap.each do |name, bit|
    res << name if (bitmap & bit) != 0
  end

  res.join ','
end

bitmap_for(name) click to toggle source

Returns a unique bit for name

# File lib/rdoc/markup/attributes.rb, line 29
def bitmap_for name
  bitmap = @name_to_bitmap.assoc name

  unless bitmap then
    bitmap = @next_bitmap
    @next_bitmap <<= 1
    @name_to_bitmap << [name, bitmap]
  else
    bitmap = bitmap.last
  end

  bitmap
end

each_name_of(bitmap) { |name| ... } click to toggle source

yields each attribute name in bitmap

# File lib/rdoc/markup/attributes.rb, line 60
def each_name_of bitmap
  return enum_for __method__, bitmap unless block_given?

  @name_to_bitmap.each do |name, bit|
    next if bit == @special

    yield name.to_s if (bitmap & bit) != 0
  end
end