Module: Ruby2JS::Filter::CJS

Includes:
SEXP
Defined in:
lib/ruby2js/filter/cjs.rb

Instance Method Summary collapse

Methods included from SEXP

#S, #s

Instance Method Details

#on_block(node) ⇒ Object 



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# File 'lib/ruby2js/filter/cjs.rb', line 158

def on_block(node)
  child = node.children[0]
  unless child.type == :send and child.children[0..1] == [nil, :export]
    return super 
  end

  send = child.children[2]
  unless send.type == :send and send.children[0..1] == [nil, :default]
    return super 
  end

  if send.children[2] == s(:send, nil, :proc)
    node.updated(:send, [
      s(:attr, nil, :module),
      :exports=,
      s(:block, s(:send, nil, :proc),
      *process_all(node.children[1..-1]))
    ])
  elsif send.children[2] == s(:send, nil, :async, s(:send, nil, :proc))
    node.updated(:send, [
      s(:attr, nil, :module),
      :exports=,
      s(:send, nil, :async,
        s(:block, s(:send, nil, :proc),
        *process_all(node.children[1..-1])))
    ])
  else
    super
  end
end

#on_send(node) ⇒ Object 



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# File 'lib/ruby2js/filter/cjs.rb', line 63

def on_send(node)
  return super unless node.children[1] == :export

  if node.children[2].type == :def
    fn = node.children[2]
    node.updated(nil, [
      s(:attr, nil, :exports),
      fn.children[0].to_s + '=',
      s(:block, s(:send, nil, :proc), *process_all(fn.children[1..-1]))
    ])

  elsif node.children[2].type == :lvasgn
    assign = node.children[2]
    node.updated(nil, [
      s(:attr, nil, :exports),
      assign.children[0].to_s + '=',
      *process_all(assign.children[1..-1])
    ])

  elsif node.children[2].type == :casgn
    assign = node.children[2]
    if assign.children[0] == nil
      node.updated(nil, [
        s(:attr, nil, :exports),
        assign.children[1].to_s + '=',
        *process_all(assign.children[2..-1])
      ])
    else
      node
    end

  elsif node.children[2].type == :class
    assign = node.children[2]
    if assign.children[0].children[0] != nil
      node
    elsif assign.children[1] == nil
      node.updated(nil, [
        s(:attr, nil, :exports),
        assign.children[0].children[1].to_s + '=',
        s(:block, s(:send, s(:const, nil, :Class), :new),
        s(:args), *process_all(assign.children[2..-1]))
      ])
    else
      node.updated(nil, [
        s(:attr, nil, :exports),
        assign.children[0].children[1].to_s + '=',
        s(:block, s(:send, s(:const, nil, :Class), :new,
        assign.children[1]), s(:args), 
        *process_all(assign.children[2..-1]))
      ])
    end

  elsif node.children[2].type == :module
    assign = node.children[2]
    if assign.children[0].children[0] != nil
      node
    else
      node.updated(nil, [
        s(:attr, nil, :exports),
        assign.children[0].children[1].to_s + '=',
        s(:class_module, nil, nil, *process_all(assign.children[1..-1]))
      ])
    end

  elsif \
    node.children[2].type == :send and
    node.children[2].children[0..1] == [nil, :async] and
    node.children[2].children[2].type == :def
  then
    fn = node.children[2].children[2]
    node.updated(nil, [
      s(:attr, nil, :exports),
      fn.children[0].to_s + '=',
      s(:send, nil, :async,
        s(:block, s(:send, nil, :proc),
        *process_all(fn.children[1..-1])))
    ])

  elsif \
    node.children[2].type == :send and
    node.children[2].children[0..1] == [nil, :default]
  then
    node = node.children[2]

    node.updated(nil, [
      s(:attr, nil, :module),
      :exports=,
      process(node.children[2])
    ])

  else
    super
  end
end

#options=(options) ⇒ Object 



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# File 'lib/ruby2js/filter/cjs.rb', line 10

def options=(options)
  super
  @cjs_autoexports = !@disable_autoexports && options[:autoexports]
end

#process(node) ⇒ Object 



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# File 'lib/ruby2js/filter/cjs.rb', line 15

def process(node)
  return super unless @cjs_autoexports

  list = [node]
  while list.length == 1 and list.first.type == :begin
    list = list.first.children.dup
  end

  replaced = []
  list.map! do |child|
    replacement = child

    if [:module, :class].include? child.type and
      child.children.first.type == :const and
      child.children.first.children.first == nil \
    then
      replacement = s(:send, nil, :export, child)
    elsif child.type == :casgn and child.children.first == nil
      replacement = s(:send, nil, :export, child)
    elsif child.type == :def
      replacement = s(:send, nil, :export, child)
    end

    if replacement != child
      replaced << replacement
      @comments[replacement] = @comments[child] if @comments[child]
    end

    replacement
  end

  if replaced.length == 1 and @cjs_autoexports == :default
    list.map! do |child|
      if child == replaced.first
        replacement = s(:send, nil, :export, s(:send, nil, :default,
          *child.children[2..-1]))
        @comments[replacement] = @comments[child] if @comments[child]
        replacement
      else
        child
      end
    end
  end

  @cjs_autoexports = false
  process s(:begin, *list)
end