Module: Prawn::SVG::Attributes::Stroke

Included in:
Elements::Base
Defined in:
lib/prawn/svg/attributes/stroke.rb

Constant Summary collapse

CAP_STYLE_TRANSLATIONS = 
{"butt" => :butt, "round" => :round, "square" => :projecting_square}
JOIN_STYLE_TRANSLATIONS = 
{"miter" => :miter, "round" => :round, "bevel" => :bevel}

Instance Method Summary collapse

Instance Method Details

#parse_stroke_attributes_and_call ⇒ Object 



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# File 'lib/prawn/svg/attributes/stroke.rb', line 5

def parse_stroke_attributes_and_call
  if width_string = properties.stroke_width
    width = pixels(width_string)
    state.stroke_width = width
    add_call('line_width', width)
  end

  if (linecap = properties.stroke_linecap) && linecap != 'inherit'
    add_call('cap_style', CAP_STYLE_TRANSLATIONS.fetch(linecap, :butt))
  end
  
  if (linejoin = properties.stroke_linejoin) && linejoin != 'inherit'
    add_call('join_style', JOIN_STYLE_TRANSLATIONS.fetch(linejoin, :miter))
  end

  if dasharray = properties.stroke_dasharray
    case dasharray
    when 'inherit'
      # don't do anything
    when 'none'
      add_call('undash')
    else
      array = dasharray.split(Prawn::SVG::Elements::COMMA_WSP_REGEXP)
      array *= 2 if array.length % 2 == 1
      number_array = array.map {|value| pixels(value)}

      if number_array.any? {|number| number < 0}
        @document.warnings << "stroke-dasharray cannot have negative numbers; treating as 'none'"
        add_call('undash')
      elsif number_array.inject(0) {|a, b| a + b} == 0
        add_call('undash')
      else
        add_call('dash', number_array)
      end
    end
  end
end