Method: Docgenerator::Element#texkeyval

Defined in:

lib/docgenerator/element.rb

#texkeyval ⇒ Object

Build key-val options from attributs. Used e.g. by includegraphics.

If the value is true, the value is added without ‘=’. false-values are ignored.

If you need a “value=true”, then add ‘true’ as a string.

Example (Packages::IncludePDF):

class IncludePDF < Element
  add_attribute    :pages,  Attribute.create( [ :texkeyval], [ String ] )
  add_attribute    :nup,  Attribute.create( [ :texkeyval], [ /\d+x\d+/ ] )  #multiple logical pages onto each sheet of paper. 
  add_attribute    :landscape,  Attribute.create( [ :texkeyval], [ true, false ] )  #multiple logical pages onto each sheet of paper. 
  #...
  add_output( :latex,  '#{linebreak(@crbefore)}\includepdf[#{texkeyval()}]{#{@content}}#{linebreak(@crafter)}')
end

x = element(:includepdf, { :pages => '1-5', :nup => '2x2', :landscape => true }, 'filename')
puts x.texkeyval  #pages={1-5}, nup={2x2}, landscape

x = element(:includepdf, { :pages => '1-5', :nup => '2x2', :landscape => false }, 'filename')
puts x.texkeyval  #pages={1-5}, nup={2x2}

# File 'lib/docgenerator/element.rb', line 439

def texkeyval()
  keyval = []
  @attr.sort_by{|k,v| v.sortkey  }.each{|k,v|
    next unless v.texkeyval?
    case v.content
      when true, [true];   keyval << "#{k}" 
      when false, [false]  #ignore
      else  #take the value
        keyval << "#{k}={#{v}}" unless v.to_s.empty?
      end
  }
  return keyval.join(', ')
end