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Sass::Script::Tree::Interpolation

A SassScript object representing `#{}` interpolation outside a string.

@see StringInterpolation

Attributes

after[R]

@return [Node] The SassScript after the interpolation

before[R]

@return [Node] The SassScript before the interpolation

mid[R]

@return [Node] The SassScript within the interpolation

originally_text[R]

@return [Boolean] Whether the original format of the interpolation was

plain text, not an interpolation. This is used when converting back to
SassScript.
warn_for_color[R]

@return [Boolean] Whether a color value passed to the interpolation should

generate a warning.
whitespace_after[R]

@return [Boolean] Whether there was whitespace between `}` and `after`

whitespace_before[R]

@return [Boolean] Whether there was whitespace between `before` and `#{`

Public Class Methods

new(before, mid, after, wb, wa, originally_text = false, warn_for_color = false) click to toggle source

Interpolation in a property is of the form `before #{mid} after`.

@param before [Node] See {Interpolation#before} @param mid [Node] See {Interpolation#mid} @param after [Node] See {Interpolation#after} @param wb [Boolean] See {Interpolation#whitespace_before} @param wa [Boolean] See {Interpolation#whitespace_after} @param originally_text [Boolean] See {Interpolation#originally_text} @param warn_for_color [Boolean] See {Interpolation#warn_for_color} @comment

rubocop:disable ParameterLists
# File lib/sass/script/tree/interpolation.rb, line 41
def initialize(before, mid, after, wb, wa, originally_text = false, warn_for_color = false)
  # rubocop:enable ParameterLists
  @before = before
  @mid = mid
  @after = after
  @whitespace_before = wb
  @whitespace_after = wa
  @originally_text = originally_text
  @warn_for_color = warn_for_color
end

Public Instance Methods

children() click to toggle source

Returns the three components of the interpolation, `before`, `mid`, and `after`.

@return [Array<Node>] @see initialize @see Node#children

# File lib/sass/script/tree/interpolation.rb, line 75
def children
  [@before, @mid, @after].compact
end
deep_copy() click to toggle source

@see Node#deep_copy

# File lib/sass/script/tree/interpolation.rb, line 80
def deep_copy
  node = dup
  node.instance_variable_set('@before', @before.deep_copy) if @before
  node.instance_variable_set('@mid', @mid.deep_copy)
  node.instance_variable_set('@after', @after.deep_copy) if @after
  node
end
inspect() click to toggle source

@return [String] A human-readable s-expression representation of the interpolation

# File lib/sass/script/tree/interpolation.rb, line 53
def inspect
  "(interpolation #{@before.inspect} #{@mid.inspect} #{@after.inspect})"
end
to_sass(opts = {}) click to toggle source

@see Node#to_sass

# File lib/sass/script/tree/interpolation.rb, line 58
def to_sass(opts = {})
  res = ""
  res << @before.to_sass(opts) if @before
  res << ' ' if @before && @whitespace_before
  res << '#{' unless @originally_text
  res << @mid.to_sass(opts)
  res << '}' unless @originally_text
  res << ' ' if @after && @whitespace_after
  res << @after.to_sass(opts) if @after
  res
end

Protected Instance Methods

_perform(environment) click to toggle source

Evaluates the interpolation.

@param environment [Sass::Environment] The environment in which to evaluate the SassScript @return [Sass::Script::Value::String]

The SassScript string that is the value of the interpolation
# File lib/sass/script/tree/interpolation.rb, line 95
def _perform(environment)
  res = ""
  res << @before.perform(environment).to_s if @before
  res << " " if @before && @whitespace_before

  val = @mid.perform(environment)
  if @warn_for_color && val.is_a?(Sass::Script::Value::Color) && val.name
    alternative = Operation.new(Sass::Script::Value::String.new("", :string), @mid, :plus)
    Sass::Util.sass_warn WARNING on line #{line}, column #{source_range.start_pos.offset}#{" of #{filename}" if filename}:You probably don't mean to use the color value `#{val}' in interpolation here.It may end up represented as #{val.inspect}, which will likely produce invalid CSS.Always quote color names when using them as strings (for example, "#{val}").If you really want to use the color value here, use `#{alternative.to_sass}'.
  end

  res << val.to_s(:quote => :none)
  res << " " if @after && @whitespace_after
  res << @after.perform(environment).to_s if @after
  opts(Sass::Script::Value::String.new(res))
end

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