Module: Ripl::Readline::EmInput

Defined in:
lib/ripl/readline/eminput.rb

Instance Method Summary collapse

Instance Method Details

#handle_interrupt ⇒ Object 



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# File 'lib/ripl/readline/eminput.rb', line 56

def handle_interrupt
  ::Readline.callback_handler_remove
  puts
  handler_install
end

#handler_install ⇒ Object 



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# File 'lib/ripl/readline/eminput.rb', line 62

def handler_install
  ::Readline.callback_handler_install(Ripl.shell.prompt) do |line|
    EventMachine.next_tick { receive_line(line) }
  end
end

#initialize(opts = {}) ⇒ Object 



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# File 'lib/ripl/readline/eminput.rb', line 16

def initialize(opts = {})
  super()
  @on_exit = opts[:on_exit] || proc { EventMachine.stop_event_loop }
  handler_install
  Ripl.shell.before_loop
  trap('SIGINT') { handle_interrupt }
end

#notify_readable ⇒ Object 



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# File 'lib/ripl/readline/eminput.rb', line 24

def notify_readable
  ::Readline.callback_read_char
end

#on_exit ⇒ Object 



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# File 'lib/ripl/readline/eminput.rb', line 35

def on_exit
  @on_exit.call if @on_exit
end

#receive_line(line) ⇒ Object 



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# File 'lib/ripl/readline/eminput.rb', line 39

def receive_line(line)
  catch(:normal_exit) do
    catch(:ripl_exit) do
      throw :ripl_exit unless line # line = nil implies EOF

      Ripl.shell.input = line
      Ripl.shell.loop_once
      handler_install   # EditLine requires handler be
                        # reinstalled for each line.
                        # Seems harmless for Readline
      throw :normal_exit
    end
    detach              # :ripl_exit
  end
  # :normal_exit
end

#unbind ⇒ Object 



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# File 'lib/ripl/readline/eminput.rb', line 28

def unbind
  super
  ::Readline.callback_handler_remove
  Ripl.shell.after_loop
  on_exit
end