How to add Emacs keybindings?

[ddoherty03]

The README does not give me enough info to figure out how to add C-a and C-e for navigating to the beginning and end of the line a la Emacs. Here is my stab at it, which does not work. What am I doing wrong?

def add_emacs_bindings
      reader.on(:keypress) do |event|
        value = event.value

        case value
        when "\x01"  # Ctrl+A
          reader.trigger(:keyhome)
        when "\x05"  # Ctrl+E
          reader.trigger(:keyend)
        end
      end
    end

[anntnzrb]

The trigger method doesn't work for adding Emacs keybindings because it only publishes events without executing line editing logic. Instead, manually handle ctrl keys in the :keypress event and directly manipulate the line object via event.line - but this won't work either since event.line is read-only. The actual solution requires modifying the read_line method in tty-reader (lib/tty/reader.rb:~338) to add cases for :ctrl_a (call line.move_to_start) and :ctrl_e (call line.move_to_end) just like :home and :end are handled. This is tracked in piotrmurach/tty-reader#25 and #34.