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require 'sass/tree/node'
module Sass::Tree
# A dynamic node representing a Sass `@if` statement.
#
# {IfNode}s are a little odd, in that they also represent `@else` and `@else if`s.
# This is done as a linked list:
# each {IfNode} has a link (\{#else}) to the next {IfNode}.
#
# @see Sass::Tree
class IfNode < Node
# The conditional expression.
# If this is nil, this is an `@else` node, not an `@else if`.
#
# @return [Script::Expr]
attr_reader :expr
# The next {IfNode} in the if-else list, or `nil`.
#
# @return [IfNode]
attr_accessor :else
# @param expr [Script::Expr] See \{#expr}
def initialize(expr)
@expr = expr
@last_else = self
super()
end
# Append an `@else` node to the end of the list.
#
# @param node [IfNode] The `@else` node to append
def add_else(node)
@last_else.else = node
@last_else = node
end
# @see Node#options=
def options=(options)
super
self.else.options = options if self.else
end
# @see Node#_around_dump
def _around_dump
old_else = @else
old_last_else = @last_else
@else = Sass::Util.dump(@else)
@last_else = (self == @last_else ? nil : Sass::Util.dump(@last_else))
super
ensure
@else = old_else
@last_else = old_last_else
end
# @see Node#_after_load
def _after_load
super
@else = Sass::Util.load(@else)
@last_else = (@last_else ? Sass::Util.load(@last_else) : self)
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems