Class: SlimLint::Filters::Interpolation Private

Inherits:
SlimLint::Filter show all
Defined in:
lib/slim_lint/filters/interpolation.rb

Overview

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Alternative implementation of Slim::Interpolation that operates without destroying the Sexp position data.

Instance Method Summary collapse

Methods included from SlimLint::Filter::Overrides

#on_escape, #on_html_attr, #on_html_attrs, #on_html_comment, #on_html_condcomment, #on_html_js, #on_html_tag, #on_multi, #on_slim_control, #on_slim_embedded, #on_slim_output, #on_slim_text

Instance Method Details

#on_slim_interpolate(string) ⇒ Array

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Handle interpolate expression ‘[:slim, :interpolate, string]`



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# File 'lib/slim_lint/filters/interpolation.rb', line 12

def on_slim_interpolate(string)
  # Interpolate variables in text (#{variable}).
  # Split the text into multiple dynamic and static parts.
  block = Sexp.new(:multi, start: @self.start, finish: @self.finish)
  line, column = string.start
  string = string.to_s
  loop do
    case string
    when /\A\\#\{/
      # Escaped interpolation
      block << Sexp.new(:static, '#{', start: [line, column], finish: [line, (column += 2)])
      string = $'
    when /\A#\{((?>[^{}]|(\{(?>[^{}]|\g<1>)*\}))*)\}/
      # Interpolation
      _, string, code = $&, $', $1
      escape = code !~ /\A\{.*\}\Z/

      column += 2
      unless escape
        code = code[1..-2]
        column += 1
      end

      start = [line, column]
      finish = [line, column + code.size]

      block << Sexp.new(
        :slim,
        :output,
        escape,
        Sexp.new(
          :multi,
          Sexp.new(:interpolated, code, start: start, finish: finish),
          start: start,
          finish: finish
        ),
        Sexp.new(:multi, start: start, finish: finish),
        start: start,
        finish: finish
      )

      column += code.size + 1
      column += 1 unless escape
    when /\A([#\\]?[^#\\]*([#\\][^\\{#][^#\\]*)*)/
      # Static text
      text, string = $&, $'
      text_lines = text.count("\n")

      block << Sexp.new(:static, text, start: [line, column], finish: [(line + text_lines), (text_lines == 0 ? column + text.size : 1)])

      line += text_lines
      column = (text_lines == 0 ? column + text.size : 1)
    end

    break if string.empty?
  end

  block
end