class Sass::Tree::PropNode

def ==(other)
  self.class == other.class && name == other.name && value == other.value && super
end

def check!
  if @options[:property_syntax] && @options[:property_syntax] != @prop_syntax
    raise Sass::SyntaxError.new(
      "Illegal property syntax: can't use #{@prop_syntax} syntax when :property_syntax => #{@options[:property_syntax].inspect} is set.")
  elsif resolved_value.empty?
    raise Sass::SyntaxError.new("Invalid property: #{declaration.dump} (no value)." +
      pseudo_class_selector_message)
  end
end

def declaration(opts = {:old => @prop_syntax == :old}, fmt = :sass)
  name = self.name.map {|n| n.is_a?(String) ? n : "\#{#{n.to_sass(opts)}}"}.join
  if name[0] == ?:
    raise Sass::SyntaxError.new("The \"#{name}: #{self.class.val_to_sass(value, opts)}\" hack is not allowed in the Sass indented syntax")
  end
  old = opts[:old] && fmt == :sass
  initial = old ? ':' : ''
  mid = old ? '' : ':'
  "#{initial}#{name}#{mid} #{self.class.val_to_sass(value, opts)}".rstrip
end

def initialize(name, value, prop_syntax)
  @name = Sass::Util.strip_string_array(
    Sass::Util.merge_adjacent_strings(name))
  @value = value
  @tabs = 0
  @prop_syntax = prop_syntax
  super()
end

def pseudo_class_selector_message
  return "" if @prop_syntax == :new || !value.is_a?(Sass::Script::String) || !value.value.empty?
  "\nIf #{declaration.dump} should be a selector, use \"\\#{declaration}\" instead."
end

def val_to_sass(value, opts)
  val_to_sass_comma(value, opts).to_sass(opts)
end

def val_to_sass_comma(node, opts)
  return node unless node.is_a?(Sass::Script::Operation)
  return val_to_sass_concat(node, opts) unless node.operator == :comma
  Sass::Script::Operation.new(
    val_to_sass_concat(node.operand1, opts),
    val_to_sass_comma(node.operand2, opts),
    node.operator)
end

def val_to_sass_concat(node, opts)
  return node unless node.is_a?(Sass::Script::Operation)
  return val_to_sass_div(node, opts) unless node.operator == :space
  Sass::Script::Operation.new(
    val_to_sass_div(node.operand1, opts),
    val_to_sass_concat(node.operand2, opts),
    node.operator)
end

def val_to_sass_div(node, opts)
  unless node.is_a?(Sass::Script::Operation) && node.operator == :div &&
      node.operand1.is_a?(Sass::Script::Number) &&
      node.operand2.is_a?(Sass::Script::Number) &&
      (!node.operand1.original || !node.operand2.original)
    return node
  end
  Sass::Script::String.new("(#{node.to_sass(opts)})")
end