Class: Sass::Tree::ForNode

Inherits:
Node
  • Object
show all
Defined in:
lib/sass/tree/for_node.rb

Overview

A dynamic node representing a Sass @for loop.

See Also:

Constant Summary

Constants inherited from Node

Node::SAVED_OPTIONS

Instance Attribute Summary

Attributes inherited from Node

#children, #filename, #has_children, #line, #options

Instance Method Summary collapse

Methods inherited from Node

#<<, #==, #_around_dump, #_cssize, #_to_s, #balance, #check_child!, #children_to_src, #cssize, #cssize!, #dasherize, #do_extend, #each, #invisible?, #perform, #perform!, #perform_children, #run_interp, #selector_to_sass, #selector_to_scss, #selector_to_src, #semi, #style, #to_s, #to_sass, #to_scss

Constructor Details

#initialize(var, from, to, exclusive) ⇒ ForNode

Returns a new instance of ForNode.

Parameters:

  • var (String) —

    The name of the loop variable

  • from (Script::Node) —

    The parse tree for the initial expression

  • to (Script::Node) —

    The parse tree for the final expression

  • exclusive (Boolean) —

    Whether to include to in the loop or stop just before



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# File 'lib/sass/tree/for_node.rb', line 13

def initialize(var, from, to, exclusive)
  @var = var
  @from = from
  @to = to
  @exclusive = exclusive
  super()
end

Instance Method Details

#_perform(environment) ⇒ Array<Tree::Node> (protected)

Runs the child nodes once for each time through the loop, varying the variable each time.

Parameters:

  • environment (Sass::Environment) —

    The lexical environment containing variable and mixin values

Returns:

  • (Array<Tree::Node>) —

    The resulting static nodes

See Also:



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# File 'lib/sass/tree/for_node.rb', line 37

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

#invalid_child?(child) ⇒ Boolean, String (protected)

Returns an error message if the given child node is invalid, and false otherwise.

ExtendNodes are valid within Sass::Tree::ForNodes.

Parameters:

Returns:

  • (Boolean, String) —

    Whether or not the child node is valid, as well as the error message to display if it is invalid



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# File 'lib/sass/tree/for_node.rb', line 63

def invalid_child?(child)
  super unless child.is_a?(ExtendNode)
end

#to_src(tabs, opts, fmt) (protected)

See Also:



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# File 'lib/sass/tree/for_node.rb', line 24

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