Module: Ruby2JS

Defined in:
lib/ruby2js.rb,
lib/ruby2js/version.rb,
lib/ruby2js/converter.rb,
lib/ruby2js/filter/jquery.rb,
lib/ruby2js/filter/return.rb,
lib/ruby2js/filter/angularrb.rb,
lib/ruby2js/filter/functions.rb

Defined Under Namespace

Modules: Filter, VERSION Classes: Converter

Class Method Summary collapse

Class Method Details

.convert(source, options = {}) ⇒ Object 



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# File 'lib/ruby2js.rb', line 16

def self.convert(source, options={})

  if Proc === source
    file,line = source.source_location
    source = File.read(file).untaint
    ast = find_block( parse(source), line )
  elsif Parser::AST::Node === source
    ast = source
    source = ast.loc.expression.source_buffer.source
  else
    ast = parse( source )
  end

  filters = options[:filters] || Filter::DEFAULTS

  unless filters.empty?
    filter = Parser::AST::Processor
    filters.reverse.each do |mod|
      filter = Class.new(filter) {include mod} 
    end
    ast = filter.new.process(ast)
  end

  ruby2js = Ruby2JS::Converter.new( ast )

  ruby2js.binding = options[:binding]

  if source.include? "\n"
    ruby2js.enable_vertical_whitespace 
    lines = ruby2js.to_js.split("\n")
    pre = ''
    pending = false
    blank = true
    lines.each do |line|
      if line.start_with? '}' or line.start_with? ']'
        pre.sub!(/^  /,'')
        line.sub!(/;$/,";\n")
        pending = true
      else
        pending = false
      end

      line.sub! /^/, pre
      if line.end_with? '{' or line.end_with? '['
        pre += '  ' 
        line.sub!(/^/,"\n") unless blank or pending
        pending = true
      end

      blank = pending
    end

    lines.join("\n").gsub(/^  ( *(case.*|default):$)/, '\1')
  else
    ruby2js.to_js
  end
end

.find_block(ast, line) ⇒ Object 



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# File 'lib/ruby2js.rb', line 81

def self.find_block(ast, line)
  if ast.type == :block and ast.loc.expression.line == line
    return ast.children.last
  end

  ast.children.each do |child|
    if Parser::AST::Node === child
      block = find_block child, line
      return block if block
    end
  end

  nil
end

.parse(source) ⇒ Object 



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# File 'lib/ruby2js.rb', line 74

def self.parse(source)
  # workaround for https://github.com/whitequark/parser/issues/112
  buffer = Parser::Source::Buffer.new('__SOURCE__')
  buffer.raw_source = source.encode('utf-8')
  Parser::CurrentRuby.new.parse(buffer)
end