Module: RubyToBlock

Extended by:
ActiveSupport::Concern
Included in:
SourceCode
Defined in:
app/models/concerns/ruby_to_block.rb

Overview

Rubyのソースコードをブロックに変換するモジュール

Defined Under Namespace

Modules: Block Classes: Character

Constant Summary collapse

SUCCESS_DATA_MOCK = 
"  require \"smalruby\"\n\n  car1 = Character.new(costume: \"car1.png\", x: 0, y: 0, angle: 0)\n\n  car1.on(:start) do\n    loop do\n      move(10)\n      turn_if_reach_wall\n    end\n  end\n".strip_heredoc
SUCCESS_XML_MOCK = 
"  <xml xmlns=\"http://www.w3.org/1999/xhtml\">\n    <character name=\"car1\" x=\"0\" y=\"0\" angle=\"0\" costumes=\"car1.png\" />\n    <block type=\"character_new\" x=\"4\" y=\"4\">\n      <field name=\"NAME\">car1</field>\n      <statement name=\"DO\">\n        <block type=\"events_on_start\">\n          <statement name=\"DO\">\n            <block type=\"control_loop\">\n              <statement name=\"DO\">\n                <block type=\"motion_move\" inline=\"true\">\n                  <value name=\"STEP\">\n                    <block type=\"math_number\">\n                      <field name=\"NUM\">10</field>\n                    </block>\n                  </value>\n                  <next>\n                    <block type=\"motion_turn_if_reach_wall\" />\n                  </next>\n                </block>\n              </statement>\n            </block>\n          </statement>\n        </block>\n      </statement>\n    </block>\n  </xml>\n".strip_heredoc

Instance Method Summary collapse

Instance Method Details

#to_blocks ⇒ Object

XML形式のブロックに変換する



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# File 'app/models/concerns/ruby_to_block.rb', line 52

def to_blocks
  fail if data == '__FAIL__'
  return SUCCESS_XML_MOCK if data == SUCCESS_DATA_MOCK

  characters = {}
  character_stack = []
  receiver_stack = []
  statement_stack = []
  blocks = []
  current_block = nil
  lines = data.lines
  while (line = lines.shift)
    line.chomp!
    next if line.strip.empty?

    md = STATEMENT_REGEXP.match(line)

    unless md
      block = Block.new('ruby_statement', fields: { STATEMENT: line })
      if current_block # TODO: リファクタリング
        current_block.sibling = block
      else
        blocks.push(block)
      end
      current_block = block

      next
    end

    next if md[:require_smalruby]

    if (s = md[:character])
      md2 = /#{CHARACTER_RE}/.match(s)
      name = md2[1]

      characters[name] = Character.new(name: name, costumes: [md2[2]],
                                       x: md2[3], y: md2[4], angle: md2[5])
      next
    end

    if (s = md[:events_on_start])
      md2 = /#{EVENTS_ON_START_RE}/.match(s)
      name = md2[1] ? md2[1] : receiver_stack.last.name
      c = characters[name]
      character_stack.push(c)

      do_block = Block.new('null')
      events_on_start_block = Block.new('events_on_start', statements: { DO: do_block })
      if current_block && current_block.type == 'character_new' &&
          current_block[:NAME] == name
        current_block.add_statement(:DO, events_on_start_block)
        character_new_block = current_block
      else
        if c == receiver_stack.last
          current_block.sibling = events_on_start_block
          character_new_block = current_block.parent
        else
          character_new_block =
            Block.new('character_new',
                      fields: { NAME: name }, statements: { DO: events_on_start_block })
          if current_block
            if current_block.type == 'character_new'
              blocks.push(character_new_block)
            else
              current_block.sibling = character_new_block
            end
          else
            blocks.push(character_new_block)
          end
        end
      end
      statement_stack.push([:events_on_start, character_new_block])

      receiver_stack.push(c)

      current_block = do_block

      next
    end

    if md[:end]
      ends_num = lines.select { |l|
        md2 = STATEMENT_REGEXP.match(l)
        md2 && md2[:end]
      }.length + 1
      ends_num -= lines.select { |l|
        md2 = STATEMENT_REGEXP.match(l)
        md2 && (md2[:events_on_start])
      }.length
      if (ss = statement_stack.last) &&
          ends_num <= statement_stack.length
        case ss.first
        when :events_on_start
          current_block = ss[1]

          receiver_stack.pop
          character_stack.pop
          statement_stack.pop
        else
          # TODO
        end
      else
        block = Block.new('ruby_statement', fields: { STATEMENT: line })
        if current_block # TODO: リファクタリング
          current_block.sibling = block
        else
          blocks.push(block)
        end
        current_block = block
      end

      next
    end
  end

  return '' if characters.empty? && blocks.empty?

  xml = REXML::Document.new('<xml xmlns="http://www.w3.org/1999/xhtml" />',
                            attribute_quote: :quote,
                            respect_whitespace: :all)
  characters.values.each do |c|
    c.to_xml(xml.root)
  end
  blocks.each do |b|
    b.to_xml(xml.root)
  end

  output = StringIO.new
  formatter = REXML::Formatters::Pretty.new(2, true)
  formatter.compact = true
  # HACK: 行頭、行末などのスペースが1つになってしまうのを修正している
  def formatter.write_text( node, output )
    s = node.to_s()
    s.gsub!(/\s/,' ')
    if !node.is_a?(REXML::Text) ||
        node.is_a?(REXML::Text) && !node.parent.whitespace()
      s.squeeze!(" ")
    end
    s = wrap(s, @width - @level)
    s = indent_text(s, @level, " ", true)
    output << (' '*@level + s)
  end
  formatter.write(xml, output)

  output.string + "\n"
end