/scalate-jruby/src/main/resources/haml-3.0.25/lib/sass/tree/for_node.rb
http://github.com/scalate/scalate · Ruby · 55 lines · 33 code · 6 blank · 16 comment · 0 complexity · 7d8c4f8b2b294c4e4ae8e4dc06372f76 MD5 · raw file
- require 'sass/tree/node'
- module Sass::Tree
- # A dynamic node representing a Sass `@for` loop.
- #
- # @see Sass::Tree
- class ForNode < Node
- # @param var [String] The name of the loop variable
- # @param from [Script::Node] The parse tree for the initial expression
- # @param to [Script::Node] The parse tree for the final expression
- # @param exclusive [Boolean] Whether to include `to` in the loop
- # or stop just before
- def initialize(var, from, to, exclusive)
- @var = var
- @from = from
- @to = to
- @exclusive = exclusive
- super()
- end
- protected
- # @see Node#to_src
- def to_src(tabs, opts, fmt)
- to = @exclusive ? "to" : "through"
- "#{' ' * tabs}@for $#{dasherize(@var, opts)} from #{@from.to_sass(opts)} #{to} #{@to.to_sass(opts)}" +
- children_to_src(tabs, opts, fmt)
- end
- # Runs the child nodes once for each time through the loop,
- # varying the variable each time.
- #
- # @param environment [Sass::Environment] The lexical environment containing
- # variable and mixin values
- # @return [Array<Tree::Node>] The resulting static nodes
- # @see Sass::Tree
- def _perform(environment)
- from = @from.perform(environment)
- to = @to.perform(environment)
- from.assert_int!
- to.assert_int!
- to = to.coerce(from.numerator_units, from.denominator_units)
- range = Range.new(from.to_i, to.to_i, @exclusive)
- children = []
- environment = Sass::Environment.new(environment)
- range.each do |i|
- environment.set_local_var(@var, Sass::Script::Number.new(i, from.numerator_units, from.denominator_units))
- children += perform_children(environment)
- end
- children
- end
- end
- end