Module: Compass::SassExtensions::Functions::Constants

Included in:
GradientSupport::LinearGradient, GradientSupport::RadialGradient, Sass::Script::Functions
Defined in:
lib/compass/sass_extensions/functions/constants.rb

Constant Summary collapse

POSITIONS = 
/top|bottom|left|right|center/

Instance Method Summary collapse

Instance Method Details

#is_position(position) ⇒ Object 



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# File 'lib/compass/sass_extensions/functions/constants.rb', line 4

def is_position(position)
  Sass::Script::Bool.new(position.is_a?(Sass::Script::String) && !!(position.value =~ POSITIONS))
end

#is_position_list(position_list) ⇒ Object 



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# File 'lib/compass/sass_extensions/functions/constants.rb', line 7

def is_position_list(position_list)
  Sass::Script::Bool.new(position_list.is_a?(Sass::Script::List) && position_list.value.all?{|p| is_position(p).to_bool})
end

#is_url(string) ⇒ Object 



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# File 'lib/compass/sass_extensions/functions/constants.rb', line 49

def is_url(string)
  if string.is_a?(Sass::Script::String)
    is_url = !!(string.value =~ /^url\(.*\)$/)
    Sass::Script::Bool.new(is_url)
  else
    Sass::Script::Bool.new(false)
  end
end

#opposite_position(position) ⇒ Object

returns the opposite position of a side or corner.



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# File 'lib/compass/sass_extensions/functions/constants.rb', line 11

def opposite_position(position)
  position = unless position.is_a?(Sass::Script::List)
    Sass::Script::List.new([position], :space)
  else
    Sass::Script::List.new(position.value.dup, position.separator)
  end
  position.value.map! do |pos|
    if pos.is_a? Sass::Script::String
      opposite = case pos.value
      when "top" then "bottom"
      when "bottom" then "top"
      when "left" then "right"
      when "right" then "left"
      when "center" then "center"
      else
        Compass::Util.compass_warn("Cannot determine the opposite position of: #{pos}")
        pos.value
      end
      Sass::Script::String.new(opposite)
    elsif pos.is_a? Sass::Script::Number
      if pos.numerator_units == ["%"] && pos.denominator_units == []
        Sass::Script::Number.new(100-pos.value, ["%"])
      else
        Compass::Util.compass_warn("Cannot determine the opposite position of: #{pos}")
        pos
      end
    else
      Compass::Util.compass_warn("Cannot determine the opposite position of: #{pos}")
      pos
    end
  end
  if position.value.size == 1
    position.value.first
  else
    position
  end
end