Class: Synvert::Core::Engine::Slim

Inherits:
Object
  • Object
show all
Extended by:
Elegant
Defined in:
lib/synvert/core/engine/slim.rb

Constant Summary collapse

ATTRIBUTES_PAIR = 
{ '{' => '}', '[' => ']', '(' => ')' }

Constants included from Elegant

Elegant::DO_BLOCK_REGEX, Elegant::ELSE_KEYWORDS, Elegant::END_LINE, Elegant::IF_KEYWORDS, Elegant::WHITESPACE

Class Method Summary collapse

Methods included from Elegant

generate_transform_proc, insert_end?, scan_ruby_expression, scan_ruby_interpolation_and_plain_text, scan_ruby_statement

Class Method Details

.encode(source) ⇒ String

Encode haml string, leave only ruby code, replace other haml code with whitespace. And insert end\n for each if, unless, begin, case to make it a valid ruby code.

Parameters:

  • source (String) —

    haml code.

Returns:

  • (String) —

    encoded ruby code.



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# File 'lib/synvert/core/engine/slim.rb', line 16

def encode(source)
  leading_spaces_counts = []
  new_code = []
  scanner = StringScanner.new(source)
  loop do
    new_code << scanner.scan(/\s*/)
    leading_spaces_count = scanner.matched.size
    if scanner.scan('-') # it matches ruby statement "  - current_user"
      new_code << WHITESPACE
      scan_ruby_statement(scanner, new_code, leading_spaces_counts, leading_spaces_count)
    elsif scanner.scan(/==?/) # it matches ruby expression "  = current_user.login"
      new_code << (WHITESPACE * scanner.matched.size)
      scan_ruby_expression(scanner, new_code, leading_spaces_counts, leading_spaces_count)
    elsif scanner.scan(/[a-z#\.][a-zA-Z0-9\-_%#\.]*/) # it matches element, id and class "  span.user"
      new_code << (WHITESPACE * scanner.matched.size)
      ATTRIBUTES_PAIR.each do |start, ending| # it matches attributes in brackets "  span[ class='user' ]"
        scan_matching_wrapper(scanner, new_code, start, ending)
      end
      scan_attributes_between_whitespace(scanner, new_code)
      if scanner.scan(/ ?==?/) # it matches ruby expression "  span= current_user.login"
        new_code << ((WHITESPACE * (scanner.matched.size - 1)) + ';')
        scan_ruby_expression(scanner, new_code, leading_spaces_counts, leading_spaces_count)
      else
        scan_ruby_interpolation_and_plain_text(scanner, new_code, leading_spaces_counts, leading_spaces_count)
      end
    else
      scan_ruby_interpolation_and_plain_text(scanner, new_code, leading_spaces_counts, leading_spaces_count)
    end

    break if scanner.eos?
  end

  while leading_spaces_counts.pop
    new_code << END_LINE
  end
  new_code.join
end