class Reline::Core

Constants

ATTR_READER_NAMES
DialogProc

Attributes

config[RW]
key_stroke[RW]
line_editor[RW]
output[R]

Public Class Methods

new() { |self| ... } click to toggle source
# File lib/reline.rb, line 67
def initialize
  self.output = STDOUT
  @mutex = Mutex.new
  @dialog_proc_list = {}
  yield self
  @completion_quote_character = nil
end

Public Instance Methods

add_dialog_proc(name_sym, p, context = nil) click to toggle source
# File lib/reline.rb, line 161
def add_dialog_proc(name_sym, p, context = nil)
  raise ArgumentError unless name_sym.instance_of?(Symbol)
  if p.nil?
    @dialog_proc_list.delete(name_sym)
  else
    raise ArgumentError unless p.respond_to?(:call)
    @dialog_proc_list[name_sym] = DialogProc.new(p, context)
  end
end
ambiguous_width() click to toggle source
# File lib/reline.rb, line 406
def ambiguous_width
  may_req_ambiguous_char_width unless defined? @ambiguous_width
  @ambiguous_width
end
auto_indent_proc=(p) click to toggle source
# File lib/reline.rb, line 146
def auto_indent_proc=(p)
  raise ArgumentError unless p.respond_to?(:call) or p.nil?
  @auto_indent_proc = p
end
basic_quote_characters=(v) click to toggle source
# File lib/reline.rb, line 103
def basic_quote_characters=(v)
  @basic_quote_characters = v.encode(encoding)
end
basic_word_break_characters=(v) click to toggle source
# File lib/reline.rb, line 95
def basic_word_break_characters=(v)
  @basic_word_break_characters = v.encode(encoding)
end
completer_quote_characters=(v) click to toggle source
# File lib/reline.rb, line 107
def completer_quote_characters=(v)
  @completer_quote_characters = v.encode(encoding)
end
completer_word_break_characters=(v) click to toggle source
# File lib/reline.rb, line 99
def completer_word_break_characters=(v)
  @completer_word_break_characters = v.encode(encoding)
end
completion_append_character=(val) click to toggle source
# File lib/reline.rb, line 83
def completion_append_character=(val)
  if val.nil?
    @completion_append_character = nil
  elsif val.size == 1
    @completion_append_character = val.encode(encoding)
  elsif val.size > 1
    @completion_append_character = val[0].encode(encoding)
  else
    @completion_append_character = nil
  end
end
completion_case_fold() click to toggle source
# File lib/reline.rb, line 123
def completion_case_fold
  @config.completion_ignore_case
end
completion_case_fold=(v) click to toggle source
# File lib/reline.rb, line 119
def completion_case_fold=(v)
  @config.completion_ignore_case = v
end
completion_proc=(p) click to toggle source
# File lib/reline.rb, line 131
def completion_proc=(p)
  raise ArgumentError unless p.respond_to?(:call) or p.nil?
  @completion_proc = p
end
completion_quote_character() click to toggle source
# File lib/reline.rb, line 127
def completion_quote_character
  @completion_quote_character
end
dialog_proc(name_sym) click to toggle source
# File lib/reline.rb, line 171
def dialog_proc(name_sym)
  @dialog_proc_list[name_sym]
end
dig_perfect_match_proc=(p) click to toggle source
# File lib/reline.rb, line 155
def dig_perfect_match_proc=(p)
  raise ArgumentError unless p.respond_to?(:call) or p.nil?
  @dig_perfect_match_proc = p
end
emacs_editing_mode() click to toggle source
# File lib/reline.rb, line 195
def emacs_editing_mode
  config.editing_mode = :emacs
  nil
end
emacs_editing_mode?() click to toggle source
# File lib/reline.rb, line 204
def emacs_editing_mode?
  config.editing_mode_is?(:emacs)
end
encoding() click to toggle source
# File lib/reline.rb, line 79
def encoding
  io_gate.encoding
end
filename_quote_characters=(v) click to toggle source
# File lib/reline.rb, line 111
def filename_quote_characters=(v)
  @filename_quote_characters = v.encode(encoding)
end
get_screen_size() click to toggle source
# File lib/reline.rb, line 208
def get_screen_size
  io_gate.get_screen_size
end
input=(val) click to toggle source
# File lib/reline.rb, line 175
def input=(val)
  raise TypeError unless val.respond_to?(:getc) or val.nil?
  if val.respond_to?(:getc) && io_gate.respond_to?(:input=)
    io_gate.input = val
  end
end
io_gate() click to toggle source
# File lib/reline.rb, line 75
def io_gate
  Reline::IOGate
end
output=(val) click to toggle source
# File lib/reline.rb, line 182
def output=(val)
  raise TypeError unless val.respond_to?(:write) or val.nil?
  @output = val
  if io_gate.respond_to?(:output=)
    io_gate.output = val
  end
end
output_modifier_proc=(p) click to toggle source
# File lib/reline.rb, line 136
def output_modifier_proc=(p)
  raise ArgumentError unless p.respond_to?(:call) or p.nil?
  @output_modifier_proc = p
end
pre_input_hook=(p) click to toggle source
# File lib/reline.rb, line 151
def pre_input_hook=(p)
  @pre_input_hook = p
end
prompt_proc=(p) click to toggle source
# File lib/reline.rb, line 141
def prompt_proc=(p)
  raise ArgumentError unless p.respond_to?(:call) or p.nil?
  @prompt_proc = p
end
readline(prompt = '', add_hist = false) click to toggle source
# File lib/reline.rb, line 277
def readline(prompt = '', add_hist = false)
  @mutex.synchronize do
    io_gate.with_raw_input do
      inner_readline(prompt, add_hist, false)
    end

    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
end
readmultiline(prompt = '', add_hist = false, &confirm_multiline_termination) click to toggle source
# File lib/reline.rb, line 251
def readmultiline(prompt = '', add_hist = false, &confirm_multiline_termination)
  @mutex.synchronize do
    unless confirm_multiline_termination
      raise ArgumentError.new('#readmultiline needs block to confirm multiline termination')
    end

    io_gate.with_raw_input do
      inner_readline(prompt, add_hist, true, &confirm_multiline_termination)
    end

    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

    if line_editor.eof?
      line_editor.reset_line
      # Return nil if the input is aborted by C-d.
      nil
    else
      whole_buffer
    end
  end
end
special_prefixes=(v) click to toggle source
# File lib/reline.rb, line 115
def special_prefixes=(v)
  @special_prefixes = v.encode(encoding)
end
vi_editing_mode() click to toggle source
# File lib/reline.rb, line 190
def vi_editing_mode
  config.editing_mode = :vi_insert
  nil
end
vi_editing_mode?() click to toggle source
# File lib/reline.rb, line 200
def vi_editing_mode?
  config.editing_mode_is?(:vi_insert, :vi_command)
end

Private Instance Methods

inner_readline(prompt, add_hist, multiline, &confirm_multiline_termination) click to toggle source
# File lib/reline.rb, line 294
        def inner_readline(prompt, add_hist, multiline, &confirm_multiline_termination)
  if ENV['RELINE_STDERR_TTY']
    if io_gate.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
  unless config.test_mode or config.loaded?
    config.read
    io_gate.set_default_key_bindings(config)
  end
  otio = io_gate.prep

  may_req_ambiguous_char_width
  line_editor.reset(prompt, encoding: 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
  pre_input_hook&.call
  unless Reline::IOGate.dumb?
    @dialog_proc_list.each_pair do |name_sym, d|
      line_editor.add_dialog_proc(name_sym, d.dialog_proc, d.context)
    end
  end

  line_editor.print_nomultiline_prompt(prompt)
  line_editor.update_dialogs
  line_editor.rerender

  begin
    line_editor.set_signal_handlers
    loop do
      read_io(config.keyseq_timeout) { |inputs|
        line_editor.set_pasting_state(io_gate.in_pasting?)
        inputs.each do |key|
          if key.char == :bracketed_paste_start
            text = io_gate.read_bracketed_paste
            line_editor.insert_pasted_text(text)
            line_editor.scroll_into_view
          else
            line_editor.update(key)
          end
        end
      }
      if line_editor.finished?
        line_editor.render_finished
        break
      else
        line_editor.set_pasting_state(io_gate.in_pasting?)
        line_editor.rerender
      end
    end
    io_gate.move_cursor_column(0)
  rescue Errno::EIO
    # Maybe the I/O has been closed.
  ensure
    line_editor.finalize
    io_gate.deprep(otio)
  end
end
may_req_ambiguous_char_width() click to toggle source
# File lib/reline.rb, line 411
        def may_req_ambiguous_char_width
  @ambiguous_width = 2 if io_gate.dumb? || !STDIN.tty? || !STDOUT.tty?
  return if defined? @ambiguous_width
  io_gate.move_cursor_column(0)
  begin
    output.write "\u{25bd}"
  rescue Encoding::UndefinedConversionError
    # LANG=C
    @ambiguous_width = 1
  else
    @ambiguous_width = io_gate.cursor_pos.x
  end
  io_gate.move_cursor_column(0)
  io_gate.erase_after_cursor
end
read_io(keyseq_timeout, &block) click to toggle source

GNU Readline watis for “keyseq-timeout” milliseconds when the input is ambiguous whether it is matching or matched. If the next character does not arrive within the specified timeout, input is considered as matched. ‘ESC` is ambiguous because it can be a standalone ESC (matched) or part of `ESC char` or part of CSI sequence (matching).

# File lib/reline.rb, line 376
        def read_io(keyseq_timeout, &block)
  buffer = []
  status = KeyStroke::MATCHING
  loop do
    timeout = status == KeyStroke::MATCHING_MATCHED ? keyseq_timeout.fdiv(1000) : Float::INFINITY
    c = io_gate.getc(timeout)
    if c.nil? || c == -1
      if status == KeyStroke::MATCHING_MATCHED
        status = KeyStroke::MATCHED
      elsif buffer.empty?
        # io_gate is closed and reached EOF
        block.call([Key.new(nil, nil, false)])
        return
      else
        status = KeyStroke::UNMATCHED
      end
    else
      buffer << c
      status = key_stroke.match_status(buffer)
    end

    if status == KeyStroke::MATCHED || status == KeyStroke::UNMATCHED
      expanded, rest_bytes = key_stroke.expand(buffer)
      rest_bytes.reverse_each { |c| io_gate.ungetc(c) }
      block.call(expanded)
      return
    end
  end
end