Class: AuthorEngine::CodeEditor::Highlighting

Inherits:
Object
  • Object
show all
Includes:
Part::Colors
Defined in:
lib/author_engine/code_editor/highlighting.rb

Constant Summary

Constants included from Part::Colors

Part::Colors::COLORS

Instance Method Summary collapse

Methods included from Part::Colors

#black, #blue, #brown, #dark_blue, #dark_gray, #dark_green, #dark_purple, #green, #indigo, #light_gray, #orange, #peach, #pink, #red, #rgb, #white, #xml_color, #yellow

Constructor Details

#initialize ⇒ Highlighting

Returns a new instance of Highlighting.



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# File 'lib/author_engine/code_editor/highlighting.rb', line 6

def initialize
  @highlight_colors = {
    instance_variable: xml_color(green),
    keyword: xml_color(red),
    method: xml_color(yellow),
    ident: xml_color(yellow),
    comment: xml_color(dark_gray),
    constant: xml_color(orange),

    delimiter: xml_color(blue),
    content: xml_color(blue),
    integer: xml_color(blue),
    float: xml_color(blue),
    symbol: xml_color(blue),
  }

  @last_text = ""
end

Instance Method Details

#highlight(string:, text:) ⇒ Object 



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# File 'lib/author_engine/code_editor/highlighting.rb', line 25

def highlight(string:, text:)
  return unless @last_text != string
  @last_text = string

  buffer = ""

  tokens = CodeRay.scan(string, :ruby).tokens
  tokens.each_with_index do |token, index|
    buffer = "#{buffer}#{style(text: token, token: tokens[index+1])}" if token.is_a?(String)
  end

  text.message = buffer
end

#style(text:, token:) ⇒ Object 



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# File 'lib/author_engine/code_editor/highlighting.rb', line 39

def style(text:, token:)
  color = @highlight_colors.dig(token)
  if color
    return "<c=#{color}>#{text}</c>"
  else
    return text
  end
end