Class: Prawn::SVG::Font

Inherits:
Object
  • Object
show all
Defined in:
lib/prawn/svg/font.rb

Constant Summary collapse

GENERIC_CSS_FONT_MAPPING = 
{
  'serif'      => 'Times-Roman',
  'sans-serif' => 'Helvetica',
  'cursive'    => 'Times-Roman',
  'fantasy'    => 'Times-Roman',
  'monospace'  => 'Courier'
}.freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, weight, style, font_registry: nil) ⇒ Font

Returns a new instance of Font.



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# File 'lib/prawn/svg/font.rb', line 23

def initialize(name, weight, style, font_registry: nil)
  @font_registry = font_registry
  unless font_registry.installed_fonts.key?(name)
    # map generic font name to one of the built-in PDF fonts if not already mapped
    name = GENERIC_CSS_FONT_MAPPING[name] || name
  end
  @name = font_registry.correctly_cased_font_name(name) || name
  @weight = weight
  @style = style
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/prawn/svg/font.rb', line 10

def name
  @name
end

#style ⇒ Object (readonly)

Returns the value of attribute style.



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# File 'lib/prawn/svg/font.rb', line 10

def style
  @style
end

#weight ⇒ Object (readonly)

Returns the value of attribute weight.



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# File 'lib/prawn/svg/font.rb', line 10

def weight
  @weight
end

Class Method Details

.weight_for_css_font_weight(weight) ⇒ Object 



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# File 'lib/prawn/svg/font.rb', line 12

def self.weight_for_css_font_weight(weight)
  case weight
  when '100', '200', '300'    then :light
  when '400', '500', 'normal' then :normal
  when '600'                  then :semibold
  when '700', 'bold'          then :bold
  when '800'                  then :extrabold
  when '900'                  then :black
  end
end

Instance Method Details

#installed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/prawn/svg/font.rb', line 34

def installed?
  subfamilies = @font_registry.installed_fonts[name]
  !subfamilies.nil? && subfamilies.key?(subfamily)
end

#subfamily ⇒ Object

Construct a subfamily name, ensuring that the subfamily is a valid one for the font.



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# File 'lib/prawn/svg/font.rb', line 40

def subfamily
  if (subfamilies = @font_registry.installed_fonts[name])
    if subfamilies.key?(subfamily_name)
      subfamily_name
    elsif subfamilies.key?(:normal)
      :normal
    else
      subfamilies.keys.first
    end
  end
end