Class: Textbringer::Keymap

Inherits:
Object
  • Object
show all
Defined in:
lib/textbringer/keymap.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Keymap 



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# File 'lib/textbringer/keymap.rb', line 7

def initialize
  @map = {}
end

Instance Method Details

#define_key(key, command) ⇒ Object Also known as: [] 



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# File 'lib/textbringer/keymap.rb', line 11

def define_key(key, command)
  key_sequence = kbd(key)

  case key_sequence.size
  when 0
    raise ArgumentError, "Empty key"
  when 1
    @map[key_sequence.first] = command
  else
    k, *ks = key_sequence
    (@map[k] ||= Keymap.new).define_key(ks, command)
  end
end

#handle_undefined_key ⇒ Object 



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# File 'lib/textbringer/keymap.rb', line 38

def handle_undefined_key
  @map.default_proc = Proc.new { |h, k| yield(k) }
end

#lookup(key_sequence) ⇒ Object 



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# File 'lib/textbringer/keymap.rb', line 26

def lookup(key_sequence)
  case key_sequence.size
  when 0
    raise ArgumentError, "Empty key"
  when 1
    @map[key_sequence.first]
  else
    k, *ks = key_sequence
    @map[k]&.lookup(ks)
  end
end