Class: Prawn::SVG::Properties

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

Defined Under Namespace

Classes: Config

Constant Summary collapse

EM = 
16
FONT_SIZES = 
{
  'xx-small' => EM / 4,
  'x-small'  => EM / 4 * 2,
  'small'    => EM / 4 * 3,
  'medium'   => EM / 4 * 4,
  'large'    => EM / 4 * 5,
  'x-large'  => EM / 4 * 6,
  'xx-large' => EM / 4 * 7
}.freeze
PROPERTIES = 
{
  'clip-path'         => Config.new('none', false, %w[inherit none]),
  'color'             => Config.new('', true),
  'display'           => Config.new('inline', false, %w[inherit inline none], true),
  'fill'              => Config.new('black', true, %w[inherit none currentColor]),
  'fill-opacity'      => Config.new('1', true),
  'fill-rule'         => Config.new('nonzero', true, %w[inherit nonzero evenodd]),
  'font-family'       => Config.new('sans-serif', true),
  'font-size'         => Config.new('medium', true,
    %w[inherit xx-small x-small small medium large x-large xx-large larger smaller]),
  'font-style'        => Config.new('normal', true, %w[inherit normal italic oblique], true),
  'font-variant'      => Config.new('normal', true, %w[inherit normal small-caps], true),
  'font-weight'       => Config.new('normal', true, %w[inherit normal bold 100 200 300 400 500 600 700 800 900], true), # bolder/lighter not supported
  'letter-spacing'    => Config.new('normal', true, %w[inherit normal]),
  'marker-end'        => Config.new('none', true, %w[inherit none]),
  'marker-mid'        => Config.new('none', true, %w[inherit none]),
  'marker-start'      => Config.new('none', true, %w[inherit none]),
  'opacity'           => Config.new('1', false),
  'overflow'          => Config.new('visible', false, %w[inherit visible hidden scroll auto], true),
  'stop-color'        => Config.new('black', false, %w[inherit none currentColor]),
  'stroke'            => Config.new('none', true, %w[inherit none currentColor]),
  'stroke-dasharray'  => Config.new('none', true, %w[inherit none]),
  'stroke-linecap'    => Config.new('butt', true, %w[inherit butt round square], true),
  'stroke-linejoin'   => Config.new('miter', true, %w[inherit miter round bevel], true),
  'stroke-opacity'    => Config.new('1', true),
  'stroke-width'      => Config.new('1', true),
  'text-anchor'       => Config.new('start', true, %w[inherit start middle end], true),
  'text-decoration'   => Config.new('none', true, %w[inherit none underline], true),
  'dominant-baseline' => Config.new('auto', true, %w[inherit auto middle], true)
}.freeze
PROPERTY_CONFIGS = 
PROPERTIES.values
NAMES = 
PROPERTIES.keys
ATTR_NAMES = 
PROPERTIES.keys.map { |name| name.gsub('-', '_') }

Instance Method Summary collapse

Instance Method Details

#compute_properties(other) ⇒ Object 



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# File 'lib/prawn/svg/properties.rb', line 91

def compute_properties(other)
  PROPERTY_CONFIGS.each do |config|
    value = other.send(config.attr)

    if value && value != 'inherit'
      value = compute_font_size_property(value).to_s if config.attr == 'font_size'
      instance_variable_set(config.ivar, value)

    elsif value.nil? && !config.inheritable?
      instance_variable_set(config.ivar, config.default)
    end
  end
end

#load_default_stylesheet ⇒ Object 



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# File 'lib/prawn/svg/properties.rb', line 57

def load_default_stylesheet
  PROPERTY_CONFIGS.each do |config|
    instance_variable_set(config.ivar, config.default)
  end

  self
end

#load_hash(hash) ⇒ Object 



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# File 'lib/prawn/svg/properties.rb', line 87

def load_hash(hash)
  hash.each { |name, value| set(name, value) if value }
end

#numerical_font_size ⇒ Object 



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# File 'lib/prawn/svg/properties.rb', line 105

def numerical_font_size
  # px = pt for PDFs
  FONT_SIZES[font_size] || font_size.to_f
end

#set(name, value) ⇒ Object 



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# File 'lib/prawn/svg/properties.rb', line 65

def set(name, value)
  if (config = PROPERTIES[name.to_s.downcase])
    value = value.strip
    keyword = value.downcase
    keywords = config.keywords || ['inherit']

    if keywords.include?(keyword)
      value = keyword
    elsif config.keyword_restricted?
      value = config.default
    end

    instance_variable_set(config.ivar, value)
  end
end

#to_h ⇒ Object 



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# File 'lib/prawn/svg/properties.rb', line 81

def to_h
  PROPERTIES.each.with_object({}) do |(name, config), result|
    result[name] = instance_variable_get(config.ivar)
  end
end