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# frozen_string_literal: true
require_relative "keys"
module TTY
class Reader
# Responsible for meta-data information about key pressed
#
# @api private
class Key < Struct.new(:name, :ctrl, :meta, :shift)
def initialize(*)
super(nil, false, false, false)
end
end
# Represents key event emitted during keyboard press
#
# @api public
class KeyEvent < Struct.new(:key, :value, :line)
# Create key event from read input codes
#
# @param [Hash[Symbol]] keys
# the keys and codes mapping
# @param [Array[Integer]] codes
#
# @return [KeyEvent]
#
# @api public
def self.from(keys, char, line = "")
key = Key.new
key.name = (name = keys[char]) ? name : :ignore
case char
when proc { |c| c =~ /^[a-z]{1}$/ }
key.name = :alpha
when proc { |c| c =~ /^[A-Z]{1}$/ }
key.name = :alpha
key.shift = true
when proc { |c| c =~ /^\d+$/ }
key.name = :num
when proc { |cs| !Keys.ctrl_keys[cs].nil? }
key.ctrl = true
end
new(key, char, line)
end
# Check if key event can be triggered
#
# @return [Boolean]
#
# @api public
def trigger?
!key.nil? && !key.name.nil?
end
end # KeyEvent
end # Reader
end # TTY
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