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Edit File : reline.rb \| Size : 17.67 KB
require 'io/console' require 'timeout' require 'forwardable' require 'reline/version' require 'reline/config' require 'reline/key_actor' require 'reline/key_stroke' require 'reline/line_editor' require 'reline/history' require 'reline/terminfo' require 'rbconfig' module Reline FILENAME_COMPLETION_PROC = nil USERNAME_COMPLETION_PROC = nil class ConfigEncodingConversionError < StandardError; end Key = Struct.new('Key', :char, :combined_char, :with_meta) do def match?(other) case other when Reline::Key (other.char.nil? or char.nil? or char == other.char) and (other.combined_char.nil? or combined_char.nil? or combined_char == other.combined_char) and (other.with_meta.nil? or with_meta.nil? or with_meta == other.with_meta) when Integer, Symbol (combined_char and combined_char == other) or (combined_char.nil? and char and char == other) else false end end alias_method :==, :match? end CursorPos = Struct.new(:x, :y) DialogRenderInfo = Struct.new(:pos, :contents, :bg_color, :width, :height, :scrollbar, keyword_init: true) class Core ATTR_READER_NAMES = %i( completion_append_character basic_word_break_characters completer_word_break_characters basic_quote_characters completer_quote_characters filename_quote_characters special_prefixes completion_proc output_modifier_proc prompt_proc auto_indent_proc pre_input_hook dig_perfect_match_proc ).each(&method(:attr_reader)) attr_accessor :config attr_accessor :key_stroke attr_accessor :line_editor attr_accessor :last_incremental_search attr_reader :output def initialize self.output = STDOUT @dialog_proc_list = {} yield self @completion_quote_character = nil @bracketed_paste_finished = false end def encoding Reline::IOGate.encoding end def completion_append_character=(val) if val.nil? @completion_append_character = nil elsif val.size == 1 @completion_append_character = val.encode(Reline::IOGate.encoding) elsif val.size > 1 @completion_append_character = val[0].encode(Reline::IOGate.encoding) else @completion_append_character = nil end end def basic_word_break_characters=(v) @basic_word_break_characters = v.encode(Reline::IOGate.encoding) end def completer_word_break_characters=(v) @completer_word_break_characters = v.encode(Reline::IOGate.encoding) end def basic_quote_characters=(v) @basic_quote_characters = v.encode(Reline::IOGate.encoding) end def completer_quote_characters=(v) @completer_quote_characters = v.encode(Reline::IOGate.encoding) end def filename_quote_characters=(v) @filename_quote_characters = v.encode(Reline::IOGate.encoding) end def special_prefixes=(v) @special_prefixes = v.encode(Reline::IOGate.encoding) end def completion_case_fold=(v) @config.completion_ignore_case = v end def completion_case_fold @config.completion_ignore_case end def completion_quote_character @completion_quote_character end def completion_proc=(p) raise ArgumentError unless p.respond_to?(:call) or p.nil? @completion_proc = p end def autocompletion @config.autocompletion end def autocompletion=(val) @config.autocompletion = val end def output_modifier_proc=(p) raise ArgumentError unless p.respond_to?(:call) or p.nil? @output_modifier_proc = p end def prompt_proc=(p) raise ArgumentError unless p.respond_to?(:call) or p.nil? @prompt_proc = p end def auto_indent_proc=(p) raise ArgumentError unless p.respond_to?(:call) or p.nil? @auto_indent_proc = p end def pre_input_hook=(p) @pre_input_hook = p end def dig_perfect_match_proc=(p) raise ArgumentError unless p.respond_to?(:call) or p.nil? @dig_perfect_match_proc = p end DialogProc = Struct.new(:dialog_proc, :context) def add_dialog_proc(name_sym, p, context = nil) raise ArgumentError unless p.respond_to?(:call) or p.nil? raise ArgumentError unless name_sym.instance_of?(Symbol) @dialog_proc_list[name_sym] = DialogProc.new(p, context) end def dialog_proc(name_sym) @dialog_proc_list[name_sym] end def input=(val) raise TypeError unless val.respond_to?(:getc) or val.nil? if val.respond_to?(:getc) if defined?(Reline::ANSI) and Reline::IOGate == Reline::ANSI Reline::ANSI.input = val elsif Reline::IOGate == Reline::GeneralIO Reline::GeneralIO.input = val end end end def output=(val) raise TypeError unless val.respond_to?(:write) or val.nil? @output = val if defined?(Reline::ANSI) and Reline::IOGate == Reline::ANSI Reline::ANSI.output = val end end def vi_editing_mode config.editing_mode = :vi_insert nil end def emacs_editing_mode config.editing_mode = :emacs nil end def vi_editing_mode? config.editing_mode_is?(:vi_insert, :vi_command) end def emacs_editing_mode? config.editing_mode_is?(:emacs) end def get_screen_size Reline::IOGate.get_screen_size end Reline::DEFAULT_DIALOG_PROC_AUTOCOMPLETE = ->() { # autocomplete return nil unless config.autocompletion if just_cursor_moving and completion_journey_data.nil? # Auto complete starts only when edited return nil end pre, target, post = retrieve_completion_block(true) if target.nil? or target.empty? or (completion_journey_data&.pointer == -1 and target.size <= 3) return nil end if completion_journey_data and completion_journey_data.list result = completion_journey_data.list.dup result.shift pointer = completion_journey_data.pointer - 1 else result = call_completion_proc_with_checking_args(pre, target, post) pointer = nil end if result and result.size == 1 and result[0] == target and pointer != 0 result = nil end target_width = Reline::Unicode.calculate_width(target) x = cursor_pos.x - target_width if x < 0 x = screen_width + x y = -1 else y = 0 end cursor_pos_to_render = Reline::CursorPos.new(x, y) if context and context.is_a?(Array) context.clear context.push(cursor_pos_to_render, result, pointer, dialog) end dialog.pointer = pointer DialogRenderInfo.new(pos: cursor_pos_to_render, contents: result, scrollbar: true, height: 15) } Reline::DEFAULT_DIALOG_CONTEXT = Array.new def readmultiline(prompt = '', add_hist = false, &confirm_multiline_termination) unless confirm_multiline_termination raise ArgumentError.new('#readmultiline needs block to confirm multiline termination') end inner_readline(prompt, add_hist, true, &confirm_multiline_termination) whole_buffer = line_editor.whole_buffer.dup whole_buffer.taint if RUBY_VERSION < '2.7' if add_hist and whole_buffer and whole_buffer.chomp("\n").size > 0 Reline::HISTORY << whole_buffer end line_editor.reset_line if line_editor.whole_buffer.nil? whole_buffer end def readline(prompt = '', add_hist = false) inner_readline(prompt, add_hist, false) line = line_editor.line.dup line.taint if RUBY_VERSION < '2.7' if add_hist and line and line.chomp("\n").size > 0 Reline::HISTORY << line.chomp("\n") end line_editor.reset_line if line_editor.line.nil? line end private def inner_readline(prompt, add_hist, multiline, &confirm_multiline_termination) if ENV['RELINE_STDERR_TTY'] if Reline::IOGate.win? $stderr = File.open(ENV['RELINE_STDERR_TTY'], 'a') else $stderr.reopen(ENV['RELINE_STDERR_TTY'], 'w') end $stderr.sync = true $stderr.puts "Reline is used by #{Process.pid}" end otio = Reline::IOGate.prep may_req_ambiguous_char_width line_editor.reset(prompt, encoding: Reline::IOGate.encoding) if multiline line_editor.multiline_on if block_given? line_editor.confirm_multiline_termination_proc = confirm_multiline_termination end else line_editor.multiline_off end line_editor.output = output line_editor.completion_proc = completion_proc line_editor.completion_append_character = completion_append_character line_editor.output_modifier_proc = output_modifier_proc line_editor.prompt_proc = prompt_proc line_editor.auto_indent_proc = auto_indent_proc line_editor.dig_perfect_match_proc = dig_perfect_match_proc line_editor.pre_input_hook = pre_input_hook @dialog_proc_list.each_pair do \|name_sym, d\| line_editor.add_dialog_proc(name_sym, d.dialog_proc, d.context) end unless config.test_mode config.read config.reset_default_key_bindings Reline::IOGate.set_default_key_bindings(config) end line_editor.rerender begin line_editor.set_signal_handlers prev_pasting_state = false loop do prev_pasting_state = Reline::IOGate.in_pasting? read_io(config.keyseq_timeout) { \|inputs\| line_editor.set_pasting_state(Reline::IOGate.in_pasting?) inputs.each { \|c\| line_editor.input_key(c) line_editor.rerender } if @bracketed_paste_finished line_editor.rerender_all @bracketed_paste_finished = false end } if prev_pasting_state == true and not Reline::IOGate.in_pasting? and not line_editor.finished? line_editor.set_pasting_state(false) prev_pasting_state = false line_editor.rerender_all end break if line_editor.finished? end Reline::IOGate.move_cursor_column(0) rescue Errno::EIO # Maybe the I/O has been closed. rescue StandardError => e line_editor.finalize Reline::IOGate.deprep(otio) raise e rescue Exception # Including Interrupt line_editor.finalize Reline::IOGate.deprep(otio) raise end line_editor.finalize Reline::IOGate.deprep(otio) end # GNU Readline waits for "keyseq-timeout" milliseconds to see if the ESC # is followed by a character, and times out and treats it as a standalone # ESC if the second character does not arrive. If the second character # comes before timed out, it is treated as a modifier key with the # meta-property of meta-key, so that it can be distinguished from # multibyte characters with the 8th bit turned on. # # GNU Readline will wait for the 2nd character with "keyseq-timeout" # milli-seconds but wait forever after 3rd characters. private def read_io(keyseq_timeout, &block) buffer = [] loop do c = Reline::IOGate.getc if c == -1 result = :unmatched @bracketed_paste_finished = true else buffer << c result = key_stroke.match_status(buffer) end case result when :matched expanded = key_stroke.expand(buffer).map{ \|expanded_c\| Reline::Key.new(expanded_c, expanded_c, false) } block.(expanded) break when :matching if buffer.size == 1 case read_2nd_character_of_key_sequence(keyseq_timeout, buffer, c, block) when :break then break when :next then next end end when :unmatched if buffer.size == 1 and c == "\e".ord read_escaped_key(keyseq_timeout, c, block) else expanded = buffer.map{ \|expanded_c\| Reline::Key.new(expanded_c, expanded_c, false) } block.(expanded) end break end end end private def read_2nd_character_of_key_sequence(keyseq_timeout, buffer, c, block) begin succ_c = nil Timeout.timeout(keyseq_timeout / 1000.0) { succ_c = Reline::IOGate.getc } rescue Timeout::Error # cancel matching only when first byte block.([Reline::Key.new(c, c, false)]) return :break else case key_stroke.match_status(buffer.dup.push(succ_c)) when :unmatched if c == "\e".ord block.([Reline::Key.new(succ_c, succ_c \| 0b10000000, true)]) else block.([Reline::Key.new(c, c, false), Reline::Key.new(succ_c, succ_c, false)]) end return :break when :matching Reline::IOGate.ungetc(succ_c) return :next when :matched buffer << succ_c expanded = key_stroke.expand(buffer).map{ \|expanded_c\| Reline::Key.new(expanded_c, expanded_c, false) } block.(expanded) return :break end end end private def read_escaped_key(keyseq_timeout, c, block) begin escaped_c = nil Timeout.timeout(keyseq_timeout / 1000.0) { escaped_c = Reline::IOGate.getc } rescue Timeout::Error # independent ESC block.([Reline::Key.new(c, c, false)]) else if escaped_c.nil? block.([Reline::Key.new(c, c, false)]) elsif escaped_c >= 128 # maybe, first byte of multi byte block.([Reline::Key.new(c, c, false), Reline::Key.new(escaped_c, escaped_c, false)]) elsif escaped_c == "\e".ord # escape twice block.([Reline::Key.new(c, c, false), Reline::Key.new(c, c, false)]) else block.([Reline::Key.new(escaped_c, escaped_c \| 0b10000000, true)]) end end end def ambiguous_width may_req_ambiguous_char_width unless defined? @ambiguous_width @ambiguous_width end private def may_req_ambiguous_char_width @ambiguous_width = 2 if Reline::IOGate == Reline::GeneralIO or STDOUT.is_a?(File) return if defined? @ambiguous_width Reline::IOGate.move_cursor_column(0) begin output.write "\u{25bd}" rescue Encoding::UndefinedConversionError # LANG=C @ambiguous_width = 1 else @ambiguous_width = Reline::IOGate.cursor_pos.x end Reline::IOGate.move_cursor_column(0) Reline::IOGate.erase_after_cursor end end extend Forwardable extend SingleForwardable #-------------------------------------------------------- # Documented API #-------------------------------------------------------- (Core::ATTR_READER_NAMES).each { \|name\| def_single_delegators :core, :"#{name}", :"#{name}=" } def_single_delegators :core, :input=, :output= def_single_delegators :core, :vi_editing_mode, :emacs_editing_mode def_single_delegators :core, :readline def_single_delegators :core, :completion_case_fold, :completion_case_fold= def_single_delegators :core, :completion_quote_character def_instance_delegators self, :readline private :readline #-------------------------------------------------------- # Undocumented API #-------------------------------------------------------- # Testable in original def_single_delegators :core, :get_screen_size def_single_delegators :line_editor, :eof? def_instance_delegators self, :eof? def_single_delegators :line_editor, :delete_text def_single_delegator :line_editor, :line, :line_buffer def_single_delegator :line_editor, :byte_pointer, :point def_single_delegator :line_editor, :byte_pointer=, :point= def self.insert_text(args, &block) line_editor.insert_text(args, &block) self end # Untestable in original def_single_delegator :line_editor, :rerender, :redisplay def_single_delegators :core, :vi_editing_mode?, :emacs_editing_mode? def_single_delegators :core, :ambiguous_width def_single_delegators :core, :last_incremental_search def_single_delegators :core, :last_incremental_search= def_single_delegators :core, :add_dialog_proc def_single_delegators :core, :dialog_proc def_single_delegators :core, :autocompletion, :autocompletion= def_single_delegators :core, :readmultiline def_instance_delegators self, :readmultiline private :readmultiline def self.encoding_system_needs self.core.encoding end def self.core @core \|\|= Core.new { \|core\| core.config = Reline::Config.new core.key_stroke = Reline::KeyStroke.new(core.config) core.line_editor = Reline::LineEditor.new(core.config, Reline::IOGate.encoding) core.basic_word_break_characters = " \t\n`><=;\|&{(" core.completer_word_break_characters = " \t\n`><=;\|&{(" core.basic_quote_characters = '"\'' core.completer_quote_characters = '"\'' core.filename_quote_characters = "" core.special_prefixes = "" core.add_dialog_proc(:autocomplete, Reline::DEFAULT_DIALOG_PROC_AUTOCOMPLETE, Reline::DEFAULT_DIALOG_CONTEXT) } end def self.ungetc(c) Reline::IOGate.ungetc(c) end def self.line_editor core.line_editor end end require 'reline/general_io' if RbConfig::CONFIG['host_os'] =~ /mswin\|msys\|mingw\|cygwin\|bccwin\|wince\|emc/ require 'reline/windows' if Reline::Windows.msys_tty? Reline::IOGate = if ENV['TERM'] == 'dumb' Reline::GeneralIO else require 'reline/ansi' Reline::ANSI end else Reline::IOGate = Reline::Windows end else Reline::IOGate = if $stdout.isatty require 'reline/ansi' Reline::ANSI else Reline::GeneralIO end end Reline::HISTORY = Reline::History.new(Reline.core.config) Back

Edit File : reline.rb | Size : 17.67 KB

require 'io/console'
require 'timeout'
require 'forwardable'
require 'reline/version'
require 'reline/config'
require 'reline/key_actor'
require 'reline/key_stroke'
require 'reline/line_editor'
require 'reline/history'
require 'reline/terminfo'
require 'rbconfig'

module Reline
  FILENAME_COMPLETION_PROC = nil
  USERNAME_COMPLETION_PROC = nil

class ConfigEncodingConversionError < StandardError; end

Key = Struct.new('Key', :char, :combined_char, :with_meta) do
    def match?(other)
      case other
      when Reline::Key
        (other.char.nil? or char.nil? or char == other.char) and
        (other.combined_char.nil? or combined_char.nil? or combined_char == other.combined_char) and
        (other.with_meta.nil? or with_meta.nil? or with_meta == other.with_meta)
      when Integer, Symbol
        (combined_char and combined_char == other) or
        (combined_char.nil? and char and char == other)
      else
        false
      end
    end
    alias_method :==, :match?
  end
  CursorPos = Struct.new(:x, :y)
  DialogRenderInfo = Struct.new(:pos, :contents, :bg_color, :width, :height, :scrollbar, keyword_init: true)

class Core
    ATTR_READER_NAMES = %i(
      completion_append_character
      basic_word_break_characters
      completer_word_break_characters
      basic_quote_characters
      completer_quote_characters
      filename_quote_characters
      special_prefixes
      completion_proc
      output_modifier_proc
      prompt_proc
      auto_indent_proc
      pre_input_hook
      dig_perfect_match_proc
    ).each(&method(:attr_reader))

attr_accessor :config
    attr_accessor :key_stroke
    attr_accessor :line_editor
    attr_accessor :last_incremental_search
    attr_reader :output

def initialize
      self.output = STDOUT
      @dialog_proc_list = {}
      yield self
      @completion_quote_character = nil
      @bracketed_paste_finished = false
    end

def encoding
      Reline::IOGate.encoding
    end

def completion_append_character=(val)
      if val.nil?
        @completion_append_character = nil
      elsif val.size == 1
        @completion_append_character = val.encode(Reline::IOGate.encoding)
      elsif val.size > 1
        @completion_append_character = val[0].encode(Reline::IOGate.encoding)
      else
        @completion_append_character = nil
      end
    end

def basic_word_break_characters=(v)
      @basic_word_break_characters = v.encode(Reline::IOGate.encoding)
    end

def completer_word_break_characters=(v)
      @completer_word_break_characters = v.encode(Reline::IOGate.encoding)
    end

def basic_quote_characters=(v)
      @basic_quote_characters = v.encode(Reline::IOGate.encoding)
    end

def completer_quote_characters=(v)
      @completer_quote_characters = v.encode(Reline::IOGate.encoding)
    end

def filename_quote_characters=(v)
      @filename_quote_characters = v.encode(Reline::IOGate.encoding)
    end

def special_prefixes=(v)
      @special_prefixes = v.encode(Reline::IOGate.encoding)
    end

def completion_case_fold=(v)
      @config.completion_ignore_case = v
    end

def completion_case_fold
      @config.completion_ignore_case
    end

def completion_quote_character
      @completion_quote_character
    end

def completion_proc=(p)
      raise ArgumentError unless p.respond_to?(:call) or p.nil?
      @completion_proc = p
    end

def autocompletion
      @config.autocompletion
    end

def autocompletion=(val)
      @config.autocompletion = val
    end

def output_modifier_proc=(p)
      raise ArgumentError unless p.respond_to?(:call) or p.nil?
      @output_modifier_proc = p
    end

def prompt_proc=(p)
      raise ArgumentError unless p.respond_to?(:call) or p.nil?
      @prompt_proc = p
    end

def auto_indent_proc=(p)
      raise ArgumentError unless p.respond_to?(:call) or p.nil?
      @auto_indent_proc = p
    end

def pre_input_hook=(p)
      @pre_input_hook = p
    end

def dig_perfect_match_proc=(p)
      raise ArgumentError unless p.respond_to?(:call) or p.nil?
      @dig_perfect_match_proc = p
    end

DialogProc = Struct.new(:dialog_proc, :context)
    def add_dialog_proc(name_sym, p, context = nil)
      raise ArgumentError unless p.respond_to?(:call) or p.nil?
      raise ArgumentError unless name_sym.instance_of?(Symbol)
      @dialog_proc_list[name_sym] = DialogProc.new(p, context)
    end

def dialog_proc(name_sym)
      @dialog_proc_list[name_sym]
    end

def input=(val)
      raise TypeError unless val.respond_to?(:getc) or val.nil?
      if val.respond_to?(:getc)
        if defined?(Reline::ANSI) and Reline::IOGate == Reline::ANSI
          Reline::ANSI.input = val
        elsif Reline::IOGate == Reline::GeneralIO
          Reline::GeneralIO.input = val
        end
      end
    end

def output=(val)
      raise TypeError unless val.respond_to?(:write) or val.nil?
      @output = val
      if defined?(Reline::ANSI) and Reline::IOGate == Reline::ANSI
        Reline::ANSI.output = val
      end
    end

def vi_editing_mode
      config.editing_mode = :vi_insert
      nil
    end

def emacs_editing_mode
      config.editing_mode = :emacs
      nil
    end

def vi_editing_mode?
      config.editing_mode_is?(:vi_insert, :vi_command)
    end

def emacs_editing_mode?
      config.editing_mode_is?(:emacs)
    end

def get_screen_size
      Reline::IOGate.get_screen_size
    end

Reline::DEFAULT_DIALOG_PROC_AUTOCOMPLETE = ->() {
      # autocomplete
      return nil unless config.autocompletion
      if just_cursor_moving and completion_journey_data.nil?
        # Auto complete starts only when edited
        return nil
      end
      pre, target, post = retrieve_completion_block(true)
      if target.nil? or target.empty? or (completion_journey_data&.pointer == -1 and target.size <= 3)
        return nil
      end
      if completion_journey_data and completion_journey_data.list
        result = completion_journey_data.list.dup
        result.shift
        pointer = completion_journey_data.pointer - 1
      else
        result = call_completion_proc_with_checking_args(pre, target, post)
        pointer = nil
      end
      if result and result.size == 1 and result[0] == target and pointer != 0
        result = nil
      end
      target_width = Reline::Unicode.calculate_width(target)
      x = cursor_pos.x - target_width
      if x < 0
        x = screen_width + x
        y = -1
      else
        y = 0
      end
      cursor_pos_to_render = Reline::CursorPos.new(x, y)
      if context and context.is_a?(Array)
        context.clear
        context.push(cursor_pos_to_render, result, pointer, dialog)
      end
      dialog.pointer = pointer
      DialogRenderInfo.new(pos: cursor_pos_to_render, contents: result, scrollbar: true, height: 15)
    }
    Reline::DEFAULT_DIALOG_CONTEXT = Array.new

def readmultiline(prompt = '', add_hist = false, &confirm_multiline_termination)
      unless confirm_multiline_termination
        raise ArgumentError.new('#readmultiline needs block to confirm multiline termination')
      end
      inner_readline(prompt, add_hist, true, &confirm_multiline_termination)

whole_buffer = line_editor.whole_buffer.dup
      whole_buffer.taint if RUBY_VERSION < '2.7'
      if add_hist and whole_buffer and whole_buffer.chomp("\n").size > 0
        Reline::HISTORY << whole_buffer
      end

line_editor.reset_line if line_editor.whole_buffer.nil?
      whole_buffer
    end

def readline(prompt = '', add_hist = false)
      inner_readline(prompt, add_hist, false)

line = line_editor.line.dup
      line.taint if RUBY_VERSION < '2.7'
      if add_hist and line and line.chomp("\n").size > 0
        Reline::HISTORY << line.chomp("\n")
      end

line_editor.reset_line if line_editor.line.nil?
      line
    end

private def inner_readline(prompt, add_hist, multiline, &confirm_multiline_termination)
      if ENV['RELINE_STDERR_TTY']
        if Reline::IOGate.win?
          $stderr = File.open(ENV['RELINE_STDERR_TTY'], 'a')
        else
          $stderr.reopen(ENV['RELINE_STDERR_TTY'], 'w')
        end
        $stderr.sync = true
        $stderr.puts "Reline is used by #{Process.pid}"
      end
      otio = Reline::IOGate.prep

may_req_ambiguous_char_width
      line_editor.reset(prompt, encoding: Reline::IOGate.encoding)
      if multiline
        line_editor.multiline_on
        if block_given?
          line_editor.confirm_multiline_termination_proc = confirm_multiline_termination
        end
      else
        line_editor.multiline_off
      end
      line_editor.output = output
      line_editor.completion_proc = completion_proc
      line_editor.completion_append_character = completion_append_character
      line_editor.output_modifier_proc = output_modifier_proc
      line_editor.prompt_proc = prompt_proc
      line_editor.auto_indent_proc = auto_indent_proc
      line_editor.dig_perfect_match_proc = dig_perfect_match_proc
      line_editor.pre_input_hook = pre_input_hook
      @dialog_proc_list.each_pair do |name_sym, d|
        line_editor.add_dialog_proc(name_sym, d.dialog_proc, d.context)
      end

unless config.test_mode
        config.read
        config.reset_default_key_bindings
        Reline::IOGate.set_default_key_bindings(config)
      end

line_editor.rerender

begin
        line_editor.set_signal_handlers
        prev_pasting_state = false
        loop do
          prev_pasting_state = Reline::IOGate.in_pasting?
          read_io(config.keyseq_timeout) { |inputs|
            line_editor.set_pasting_state(Reline::IOGate.in_pasting?)
            inputs.each { |c|
              line_editor.input_key(c)
              line_editor.rerender
            }
            if @bracketed_paste_finished
              line_editor.rerender_all
              @bracketed_paste_finished = false
            end
          }
          if prev_pasting_state == true and not Reline::IOGate.in_pasting? and not line_editor.finished?
            line_editor.set_pasting_state(false)
            prev_pasting_state = false
            line_editor.rerender_all
          end
          break if line_editor.finished?
        end
        Reline::IOGate.move_cursor_column(0)
      rescue Errno::EIO
        # Maybe the I/O has been closed.
      rescue StandardError => e
        line_editor.finalize
        Reline::IOGate.deprep(otio)
        raise e
      rescue Exception
        # Including Interrupt
        line_editor.finalize
        Reline::IOGate.deprep(otio)
        raise
      end

line_editor.finalize
      Reline::IOGate.deprep(otio)
    end

# GNU Readline waits for "keyseq-timeout" milliseconds to see if the ESC
    # is followed by a character, and times out and treats it as a standalone
    # ESC if the second character does not arrive. If the second character
    # comes before timed out, it is treated as a modifier key with the
    # meta-property of meta-key, so that it can be distinguished from
    # multibyte characters with the 8th bit turned on.
    #
    # GNU Readline will wait for the 2nd character with "keyseq-timeout"
    # milli-seconds but wait forever after 3rd characters.
    private def read_io(keyseq_timeout, &block)
      buffer = []
      loop do
        c = Reline::IOGate.getc
        if c == -1
          result = :unmatched
          @bracketed_paste_finished = true
        else
          buffer << c
          result = key_stroke.match_status(buffer)
        end
        case result
        when :matched
          expanded = key_stroke.expand(buffer).map{ |expanded_c|
            Reline::Key.new(expanded_c, expanded_c, false)
          }
          block.(expanded)
          break
        when :matching
          if buffer.size == 1
            case read_2nd_character_of_key_sequence(keyseq_timeout, buffer, c, block)
            when :break then break
            when :next  then next
            end
          end
        when :unmatched
          if buffer.size == 1 and c == "\e".ord
            read_escaped_key(keyseq_timeout, c, block)
          else
            expanded = buffer.map{ |expanded_c|
              Reline::Key.new(expanded_c, expanded_c, false)
            }
            block.(expanded)
          end
          break
        end
      end
    end

private def read_2nd_character_of_key_sequence(keyseq_timeout, buffer, c, block)
      begin
        succ_c = nil
        Timeout.timeout(keyseq_timeout / 1000.0) {
          succ_c = Reline::IOGate.getc
        }
      rescue Timeout::Error # cancel matching only when first byte
        block.([Reline::Key.new(c, c, false)])
        return :break
      else
        case key_stroke.match_status(buffer.dup.push(succ_c))
        when :unmatched
          if c == "\e".ord
            block.([Reline::Key.new(succ_c, succ_c | 0b10000000, true)])
          else
            block.([Reline::Key.new(c, c, false), Reline::Key.new(succ_c, succ_c, false)])
          end
          return :break
        when :matching
          Reline::IOGate.ungetc(succ_c)
          return :next
        when :matched
          buffer << succ_c
          expanded = key_stroke.expand(buffer).map{ |expanded_c|
            Reline::Key.new(expanded_c, expanded_c, false)
          }
          block.(expanded)
          return :break
        end
      end
    end

private def read_escaped_key(keyseq_timeout, c, block)
      begin
        escaped_c = nil
        Timeout.timeout(keyseq_timeout / 1000.0) {
          escaped_c = Reline::IOGate.getc
        }
      rescue Timeout::Error # independent ESC
        block.([Reline::Key.new(c, c, false)])
      else
        if escaped_c.nil?
          block.([Reline::Key.new(c, c, false)])
        elsif escaped_c >= 128 # maybe, first byte of multi byte
          block.([Reline::Key.new(c, c, false), Reline::Key.new(escaped_c, escaped_c, false)])
        elsif escaped_c == "\e".ord # escape twice
          block.([Reline::Key.new(c, c, false), Reline::Key.new(c, c, false)])
        else
          block.([Reline::Key.new(escaped_c, escaped_c | 0b10000000, true)])
        end
      end
    end

def ambiguous_width
      may_req_ambiguous_char_width unless defined? @ambiguous_width
      @ambiguous_width
    end

private def may_req_ambiguous_char_width
      @ambiguous_width = 2 if Reline::IOGate == Reline::GeneralIO or STDOUT.is_a?(File)
      return if defined? @ambiguous_width
      Reline::IOGate.move_cursor_column(0)
      begin
        output.write "\u{25bd}"
      rescue Encoding::UndefinedConversionError
        # LANG=C
        @ambiguous_width = 1
      else
        @ambiguous_width = Reline::IOGate.cursor_pos.x
      end
      Reline::IOGate.move_cursor_column(0)
      Reline::IOGate.erase_after_cursor
    end
  end

extend Forwardable
  extend SingleForwardable

#--------------------------------------------------------
  # Documented API
  #--------------------------------------------------------

(Core::ATTR_READER_NAMES).each { |name|
    def_single_delegators :core, :"#{name}", :"#{name}="
  }
  def_single_delegators :core, :input=, :output=
  def_single_delegators :core, :vi_editing_mode, :emacs_editing_mode
  def_single_delegators :core, :readline
  def_single_delegators :core, :completion_case_fold, :completion_case_fold=
  def_single_delegators :core, :completion_quote_character
  def_instance_delegators self, :readline
  private :readline

#--------------------------------------------------------
  # Undocumented API
  #--------------------------------------------------------

# Testable in original
  def_single_delegators :core, :get_screen_size
  def_single_delegators :line_editor, :eof?
  def_instance_delegators self, :eof?
  def_single_delegators :line_editor, :delete_text
  def_single_delegator :line_editor, :line, :line_buffer
  def_single_delegator :line_editor, :byte_pointer, :point
  def_single_delegator :line_editor, :byte_pointer=, :point=

def self.insert_text(*args, &block)
    line_editor.insert_text(*args, &block)
    self
  end

# Untestable in original
  def_single_delegator :line_editor, :rerender, :redisplay
  def_single_delegators :core, :vi_editing_mode?, :emacs_editing_mode?
  def_single_delegators :core, :ambiguous_width
  def_single_delegators :core, :last_incremental_search
  def_single_delegators :core, :last_incremental_search=
  def_single_delegators :core, :add_dialog_proc
  def_single_delegators :core, :dialog_proc
  def_single_delegators :core, :autocompletion, :autocompletion=

def_single_delegators :core, :readmultiline
  def_instance_delegators self, :readmultiline
  private :readmultiline

def self.encoding_system_needs
    self.core.encoding
  end

def self.core
    @core ||= Core.new { |core|
      core.config = Reline::Config.new
      core.key_stroke = Reline::KeyStroke.new(core.config)
      core.line_editor = Reline::LineEditor.new(core.config, Reline::IOGate.encoding)

core.basic_word_break_characters = " \t\n`><=;|&{("
      core.completer_word_break_characters = " \t\n`><=;|&{("
      core.basic_quote_characters = '"\''
      core.completer_quote_characters = '"\''
      core.filename_quote_characters = ""
      core.special_prefixes = ""
      core.add_dialog_proc(:autocomplete, Reline::DEFAULT_DIALOG_PROC_AUTOCOMPLETE, Reline::DEFAULT_DIALOG_CONTEXT)
    }
  end

def self.ungetc(c)
    Reline::IOGate.ungetc(c)
  end

def self.line_editor
    core.line_editor
  end
end

require 'reline/general_io'
if RbConfig::CONFIG['host_os'] =~ /mswin|msys|mingw|cygwin|bccwin|wince|emc/
  require 'reline/windows'
  if Reline::Windows.msys_tty?
    Reline::IOGate = if ENV['TERM'] == 'dumb'
      Reline::GeneralIO
    else
      require 'reline/ansi'
      Reline::ANSI
    end
  else
    Reline::IOGate = Reline::Windows
  end
else
  Reline::IOGate = if $stdout.isatty
    require 'reline/ansi'
    Reline::ANSI
  else
    Reline::GeneralIO
  end
end
Reline::HISTORY = Reline::History.new(Reline.core.config)

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