Class: Sass::Tree::WhileNode

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

Overview

A dynamic node representing a Sass @while 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(expr) ⇒ WhileNode

Returns a new instance of WhileNode.

Parameters:

  • expr (Script::Node) —

    The parse tree for the continue expression



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# File 'lib/sass/tree/while_node.rb', line 9

def initialize(expr)
  @expr = expr
  super()
end

Instance Method Details

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

Runs the child nodes until the continue expression becomes false.

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/while_node.rb', line 27

def _perform(environment)
  children = []
  new_environment = Sass::Environment.new(environment)
  while @expr.perform(environment).to_bool
    children += perform_children(new_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::WhileNodes.

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/while_node.rb', line 44

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/while_node.rb', line 17

def to_src(tabs, opts, fmt)
  "#{'  ' * tabs}@while #{@expr.to_sass(opts)}" + children_to_src(tabs, opts, fmt)
end