Class: Prawn::Emoji::Drawer

Inherits:
Object
  • Object
show all
Defined in:
lib/prawn/emoji/drawer.rb

Instance Method Summary collapse

Constructor Details

#initialize(document) ⇒ Drawer

Returns a new instance of Drawer.



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# File 'lib/prawn/emoji/drawer.rb', line 11

def initialize(document)
  @document = document
  @emoji_index = Emoji::Index.new
end

Instance Method Details

#draw(text, text_options) ⇒ Object 



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# File 'lib/prawn/emoji/drawer.rb', line 16

def draw(text, text_options)
  return text unless text.encoding == ::Encoding::UTF_8
  return text unless Emoji::REGEX.match?(text)

  result = []
  target = Emoji::Text.new(text)

  while target.contains_emoji? do
    if emoji_index.include?(target.emoji.codepoint)
      draw_emoji(
        target,
        text_options: text_options,
        base_text: result.join
      )
      result << target.left + Emoji::Substitution.new(@document).to_s
    else
      result << target.left_with_emoji
    end

    target = Emoji::Text.new(target.remaining)
  end

  result.join + target.to_s
end