### Home Classes Methods

### In Files

- lib/compass/sass_extensions/functions/constants.rb

### Methods

- #is_position
- #is_position_list
- #is_url
- #opposite_position

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# Compass::SassExtensions::Functions::Constants

### Constants

POSITIONS

### Public Instance Methods

is_position(position) click to toggle source

    # 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) click to toggle source

    # 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) click to toggle source

    # 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) click to toggle source

returns the opposite position of a side or corner.

    # 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

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