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Viewing File: console.rb

# frozen_string_literal: true

require 'io/wait'

require_relative 'keys'
require_relative 'mode'

module TTY
  class Reader
    class Console
      ESC = "\e".freeze
      CSI = "\e[".freeze

      TIMEOUT = 0.1

      # Key codes
      #
      # @return [Hash[Symbol]]
      #
      # @api public
      attr_reader :keys

      # Escape codes
      #
      # @return [Array[Integer]]
      #
      # @api public
      attr_reader :escape_codes

      def initialize(input)
        @input = input
        @mode  = Mode.new(input)
        @keys  = Keys.ctrl_keys.merge(Keys.keys)
        @escape_codes = [[ESC.ord], CSI.bytes.to_a]
      end

      # Get a character from console with echo
      #
      # @param [Hash[Symbol]] options
      # @option options [Symbol] :echo
      #   the echo toggle
      #
      # @return [String]
      #
      # @api private
      def get_char(options)
        mode.raw(options[:raw]) do
          mode.echo(options[:echo]) do
            if options[:nonblock]
              input.wait_readable(TIMEOUT) ? input.getc : nil
            else
              input.getc
            end
          end
        end
      end

      protected

      attr_reader :mode

      attr_reader :input
    end # Console
  end # Reader
end # TTY