Class: ComponentEmbeddedRuby::Parser::RootParser

Inherits:
Base
  • Object
show all
Defined in:
lib/component_embedded_ruby/parser/root_parser.rb

Overview

Internal: Used for parsing multiple adjacent tag, string, and emedded ruby into an array.

This parser is used to parse top-level documents and the children of ‘tag` nodes, which may have any combination of adjacent tag, string, and ruby nodes.

Instance Method Summary collapse

Methods inherited from Base

#initialize

Constructor Details

This class inherits a constructor from ComponentEmbeddedRuby::Parser::Base

Instance Method Details

#call ⇒ Object 



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# File 'lib/component_embedded_ruby/parser/root_parser.rb', line 13

def call
  results = []

  while current_token
    case current_token.type
    when :open_carrot
      # If we run into a </ we are likely at the end of parsing a tag so
      # this should return and let the `TagParser` complete parsing
      #
      # e.g.
      # 1. <h1>Hello</h1> would start a `TagParser` after reading <h1
      # 2. `TagParser` reads <h1>, sees that it has
      #     children, and will use another instance of `RootParser` to reads its children
      # 3. The new RootParser reads `Hello`, then runs into `</`, so it should return `["Hello"]`
      #     and allow the `TagParser` to finish reading `</h1>`
      return results if peek_token.type == :slash

      results << TagParser.new(token_reader).call
    when :string, :identifier
      # If we're reading a string, or some other identifier that is on
      # its own, we can skip instantiating a new parser and parse it directly ourselves
      results << Node.new(nil, nil, current_token.value)
      token_reader.next
    when :ruby, :ruby_no_eval
      # If we run into Ruby code that should be evaluated inside of the
      # template, we want to create an `Eval`. The compliation step
      # handles `Eval` objects specially since it's making template
      # provided ruby code compatibile with the compiled template code.
      value = Eval.new(current_token.value, output: current_token.type == :ruby)

      results << Node.new(nil, nil, value)
      token_reader.next
    end
  end

  results
end