# frozen_string_literal: false

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#

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# irb/input-method.rb - input methods used irb

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# $Release Version: 0.9.6$

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# $Revision$

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# by Keiju ISHITSUKA(keiju@ruby-lang.org)

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#

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# --

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#

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#

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#

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require_relative 'src_encoding'

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require_relative 'magic-file'

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require_relative 'completion'

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require 'io/console'

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require 'reline'

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module IRB

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STDIN_FILE_NAME = "(line)" # :nodoc:

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class InputMethod

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# Creates a new input method object

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def initialize(file = STDIN_FILE_NAME)

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@file_name = file

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end

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# The file name of this input method, usually given during initialization.

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attr_reader :file_name

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# The irb prompt associated with this input method

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attr_accessor :prompt

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# Reads the next line from this input method.

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#

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# See IO#gets for more information.

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def gets

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fail NotImplementedError, "gets"

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end

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public :gets

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def winsize

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if instance_variable_defined?(:@stdout)

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@stdout.winsize

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else

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[24, 80]

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end

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end

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# Whether this input method is still readable when there is no more data to

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# read.

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#

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# See IO#eof for more information.

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def readable_after_eof?

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false

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end

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# For debug message

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def inspect

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'Abstract InputMethod'

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end

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end

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class StdioInputMethod < InputMethod

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# Creates a new input method object

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def initialize

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super

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@line_no = 0

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@line = []

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@stdin = IO.open(STDIN.to_i, :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-")

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@stdout = IO.open(STDOUT.to_i, 'w', :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-")

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end

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# Reads the next line from this input method.

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#

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# See IO#gets for more information.

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def gets

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print @prompt

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line = @stdin.gets

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@line[@line_no += 1] = line

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end

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# Whether the end of this input method has been reached, returns +true+ if

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# there is no more data to read.

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#

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# See IO#eof? for more information.

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def eof?

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@stdin.eof?

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end

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# Whether this input method is still readable when there is no more data to

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# read.

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#

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# See IO#eof for more information.

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def readable_after_eof?

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true

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end

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# Returns the current line number for #io.

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#

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# #line counts the number of times #gets is called.

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#

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# See IO#lineno for more information.

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def line(line_no)

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@line[line_no]

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end

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# The external encoding for standard input.

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def encoding

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@stdin.external_encoding

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end

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# For debug message

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def inspect

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'StdioInputMethod'

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end

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end

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# Use a File for IO with irb, see InputMethod

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class FileInputMethod < InputMethod

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# Creates a new input method object

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def initialize(file)

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super

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@io = IRB::MagicFile.open(file)

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end

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# The file name of this input method, usually given during initialization.

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attr_reader :file_name

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# Whether the end of this input method has been reached, returns +true+ if

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# there is no more data to read.

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#

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# See IO#eof? for more information.

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def eof?

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@io.eof?

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end

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# Reads the next line from this input method.

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#

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# See IO#gets for more information.

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def gets

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print @prompt

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@io.gets

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end

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# The external encoding for standard input.

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def encoding

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@io.external_encoding

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end

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# For debug message

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def inspect

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'FileInputMethod'

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end

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end

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begin

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class ReadlineInputMethod < InputMethod

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def self.initialize_readline

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require "readline"

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rescue LoadError

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else

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include ::Readline

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end

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# Creates a new input method object using Readline

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def initialize

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self.class.initialize_readline

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if Readline.respond_to?(:encoding_system_needs)

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IRB.__send__(:set_encoding, Readline.encoding_system_needs.name, override: false)

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end

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super

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@line_no = 0

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@line = []

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@eof = false

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@stdin = IO.open(STDIN.to_i, :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-")

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@stdout = IO.open(STDOUT.to_i, 'w', :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-")

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if Readline.respond_to?("basic_word_break_characters=")

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Readline.basic_word_break_characters = IRB::InputCompletor::BASIC_WORD_BREAK_CHARACTERS

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end

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Readline.completion_append_character = nil

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Readline.completion_proc = IRB::InputCompletor::CompletionProc

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end

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# Reads the next line from this input method.

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#

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# See IO#gets for more information.

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def gets

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Readline.input = @stdin

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Readline.output = @stdout

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if l = readline(@prompt, false)

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HISTORY.push(l) if !l.empty?

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@line[@line_no += 1] = l + "\n"

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else

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@eof = true

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l

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end

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end

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# Whether the end of this input method has been reached, returns +true+

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# if there is no more data to read.

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#

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# See IO#eof? for more information.

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def eof?

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@eof

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end

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# Whether this input method is still readable when there is no more data to

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# read.

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#

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# See IO#eof for more information.

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def readable_after_eof?

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true

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end

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# Returns the current line number for #io.

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#

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# #line counts the number of times #gets is called.

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#

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# See IO#lineno for more information.

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def line(line_no)

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@line[line_no]

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end

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# The external encoding for standard input.

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def encoding

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@stdin.external_encoding

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end

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# For debug message

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def inspect

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readline_impl = (defined?(Reline) && Readline == Reline) ? 'Reline' : 'ext/readline'

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str = "ReadlineInputMethod with #{readline_impl} #{Readline::VERSION}"

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inputrc_path = File.expand_path(ENV['INPUTRC'] || '~/.inputrc')

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str += " and #{inputrc_path}" if File.exist?(inputrc_path)

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str

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end

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end

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end

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class ReidlineInputMethod < InputMethod

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include Reline

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# Creates a new input method object using Readline

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def initialize

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IRB.__send__(:set_encoding, Reline.encoding_system_needs.name, override: false)

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super

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@line_no = 0

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@line = []

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@eof = false

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@stdin = ::IO.open(STDIN.to_i, :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-")

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@stdout = ::IO.open(STDOUT.to_i, 'w', :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-")

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if Reline.respond_to?("basic_word_break_characters=")

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Reline.basic_word_break_characters = IRB::InputCompletor::BASIC_WORD_BREAK_CHARACTERS

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end

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Reline.completion_append_character = nil

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Reline.completion_proc = IRB::InputCompletor::CompletionProc

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Reline.output_modifier_proc =

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if IRB.conf[:USE_COLORIZE]

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proc do |output, complete: |

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next unless IRB::Color.colorable?

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IRB::Color.colorize_code(output, complete: complete)

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end

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else

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proc do |output|

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Reline::Unicode.escape_for_print(output)

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end

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end

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Reline.dig_perfect_match_proc = IRB::InputCompletor::PerfectMatchedProc

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end

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def check_termination(&block)

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@check_termination_proc = block

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end

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def dynamic_prompt(&block)

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@prompt_proc = block

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end

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def auto_indent(&block)

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@auto_indent_proc = block

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end

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# Reads the next line from this input method.

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#

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# See IO#gets for more information.

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def gets

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Reline.input = @stdin

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Reline.output = @stdout

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Reline.prompt_proc = @prompt_proc

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Reline.auto_indent_proc = @auto_indent_proc if @auto_indent_proc

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if l = readmultiline(@prompt, false, &@check_termination_proc)

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HISTORY.push(l) if !l.empty?

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@line[@line_no += 1] = l + "\n"

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else

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@eof = true

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l

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end

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end

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# Whether the end of this input method has been reached, returns +true+

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# if there is no more data to read.

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#

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# See IO#eof? for more information.

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def eof?

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@eof

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end

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# Whether this input method is still readable when there is no more data to

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# read.

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#

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# See IO#eof for more information.

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def readable_after_eof?

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true

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end

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# Returns the current line number for #io.

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#

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# #line counts the number of times #gets is called.

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#

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# See IO#lineno for more information.

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def line(line_no)

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@line[line_no]

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end

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# The external encoding for standard input.

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def encoding

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@stdin.external_encoding

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end

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# For debug message

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def inspect

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config = Reline::Config.new

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str = "ReidlineInputMethod with Reline #{Reline::VERSION}"

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if config.respond_to?(:inputrc_path)

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inputrc_path = File.expand_path(config.inputrc_path)

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else

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inputrc_path = File.expand_path(ENV['INPUTRC'] || '~/.inputrc')

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end

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str += " and #{inputrc_path}" if File.exist?(inputrc_path)

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str

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end

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end

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end

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