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module Compass::SassExtensions::Functions::Constants
if defined?(Sass::Script::List)
POSITIONS = /top|bottom|left|right|center/
def is_position(position)
Sass::Script::Bool.new(position.is_a?(Sass::Script::String) && !!(position.value =~ POSITIONS))
end
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
# returns the opposite position of a side or corner.
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
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
else
# returns the opposite position of a side or corner.
def opposite_position(position)
opposite = position.value.split(/ +/).map do |pos|
case pos
when "top" then "bottom"
when "bottom" then "top"
when "left" then "right"
when "right" then "left"
when "center" then "center"
else
pos
end
end
Sass::Script::String.new(opposite.join(" "), position.type)
end
end
end
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