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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
def _dump(f)
Marshal.dump([self.expr, self.else, self.children])
end
def self._load(data)
expr, else_, children = Marshal.load(data)
node = IfNode.new(expr)
node.else = else_
node.children = children
node.instance_variable_set('@last_else',
node.else ? node.else.instance_variable_get('@last_else') : node)
node
end
# @see Node#deep_copy
def deep_copy
node = super
node.else = self.else.deep_copy if self.else
node
end
end
end
Version data entries
31 entries across 31 versions & 3 rubygems