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Edit File : input-method.rb \| Size : 4.58 KB
# # irb/input-method.rb - input methods used irb # $Release Version: 0.9.6$ # $Revision: 38544 $ # by Keiju ISHITSUKA(keiju@ruby-lang.org) # # -- # # # require 'irb/src_encoding' require 'irb/magic-file' module IRB STDIN_FILE_NAME = "(line)" # :nodoc: class InputMethod @RCS_ID='-$Id: input-method.rb 38544 2012-12-21 17:29:18Z zzak $-' # Creates a new input method object def initialize(file = STDIN_FILE_NAME) @file_name = file end # The file name of this input method, usually given during initialization. attr_reader :file_name # The irb prompt associated with this input method attr_accessor :prompt # Reads the next line from this input method. # # See IO#gets for more information. def gets IRB.fail NotImplementedError, "gets" end public :gets # Whether this input method is still readable when there is no more data to # read. # # See IO#eof for more information. def readable_after_eof? false end end class StdioInputMethod < InputMethod # Creates a new input method object def initialize super @line_no = 0 @line = [] @stdin = IO.open(STDIN.to_i, :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-") @stdout = IO.open(STDOUT.to_i, 'w', :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-") end # Reads the next line from this input method. # # See IO#gets for more information. def gets print @prompt line = @stdin.gets @line[@line_no += 1] = line end # Whether the end of this input method has been reached, returns +true+ if # there is no more data to read. # # See IO#eof? for more information. def eof? @stdin.eof? end # Whether this input method is still readable when there is no more data to # read. # # See IO#eof for more information. def readable_after_eof? true end # Returns the current line number for #io. # # #line counts the number of times #gets is called. # # See IO#lineno for more information. def line(line_no) @line[line_no] end # The external encoding for standard input. def encoding @stdin.external_encoding end end # Use a File for IO with irb, see InputMethod class FileInputMethod < InputMethod # Creates a new input method object def initialize(file) super @io = IRB::MagicFile.open(file) end # The file name of this input method, usually given during initialization. attr_reader :file_name # Whether the end of this input method has been reached, returns +true+ if # there is no more data to read. # # See IO#eof? for more information. def eof? @io.eof? end # Reads the next line from this input method. # # See IO#gets for more information. def gets print @prompt l = @io.gets # print @prompt, l l end # The external encoding for standard input. def encoding @io.external_encoding end end begin require "readline" class ReadlineInputMethod < InputMethod include Readline # Creates a new input method object using Readline def initialize super @line_no = 0 @line = [] @eof = false @stdin = IO.open(STDIN.to_i, :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-") @stdout = IO.open(STDOUT.to_i, 'w', :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-") end # Reads the next line from this input method. # # See IO#gets for more information. def gets Readline.input = @stdin Readline.output = @stdout if l = readline(@prompt, false) HISTORY.push(l) if !l.empty? @line[@line_no += 1] = l + "\n" else @eof = true l end end # Whether the end of this input method has been reached, returns +true+ # if there is no more data to read. # # See IO#eof? for more information. def eof? @eof end # Whether this input method is still readable when there is no more data to # read. # # See IO#eof for more information. def readable_after_eof? true end # Returns the current line number for #io. # # #line counts the number of times #gets is called. # # See IO#lineno for more information. def line(line_no) @line[line_no] end # The external encoding for standard input. def encoding @stdin.external_encoding end end rescue LoadError end end Back

Edit File : input-method.rb | Size : 4.58 KB

#
#   irb/input-method.rb - input methods used irb
#   	$Release Version: 0.9.6$
#   	$Revision: 38544 $
#   	by Keiju ISHITSUKA(keiju@ruby-lang.org)
#
# --
#
#
#
require 'irb/src_encoding'
require 'irb/magic-file'

module IRB
  STDIN_FILE_NAME = "(line)" # :nodoc:
  class InputMethod
    @RCS_ID='-$Id: input-method.rb 38544 2012-12-21 17:29:18Z zzak $-'

# Creates a new input method object
    def initialize(file = STDIN_FILE_NAME)
      @file_name = file
    end
    # The file name of this input method, usually given during initialization.
    attr_reader :file_name

# The irb prompt associated with this input method
    attr_accessor :prompt

# Reads the next line from this input method.
    #
    # See IO#gets for more information.
    def gets
      IRB.fail NotImplementedError, "gets"
    end
    public :gets

# Whether this input method is still readable when there is no more data to
    # read.
    #
    # See IO#eof for more information.
    def readable_after_eof?
      false
    end
  end

class StdioInputMethod < InputMethod
    # Creates a new input method object
    def initialize
      super
      @line_no = 0
      @line = []
      @stdin = IO.open(STDIN.to_i, :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-")
      @stdout = IO.open(STDOUT.to_i, 'w', :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-")
    end

# Reads the next line from this input method.
    #
    # See IO#gets for more information.
    def gets
      print @prompt
      line = @stdin.gets
      @line[@line_no += 1] = line
    end

# Whether the end of this input method has been reached, returns +true+ if
    # there is no more data to read.
    #
    # See IO#eof? for more information.
    def eof?
      @stdin.eof?
    end

# Whether this input method is still readable when there is no more data to
    # read.
    #
    # See IO#eof for more information.
    def readable_after_eof?
      true
    end

# Returns the current line number for #io.
    #
    # #line counts the number of times #gets is called.
    #
    # See IO#lineno for more information.
    def line(line_no)
      @line[line_no]
    end

# The external encoding for standard input.
    def encoding
      @stdin.external_encoding
    end
  end

# Use a File for IO with irb, see InputMethod
  class FileInputMethod < InputMethod
    # Creates a new input method object
    def initialize(file)
      super
      @io = IRB::MagicFile.open(file)
    end
    # The file name of this input method, usually given during initialization.
    attr_reader :file_name

# Whether the end of this input method has been reached, returns +true+ if
    # there is no more data to read.
    #
    # See IO#eof? for more information.
    def eof?
      @io.eof?
    end

# Reads the next line from this input method.
    #
    # See IO#gets for more information.
    def gets
      print @prompt
      l = @io.gets
#      print @prompt, l
      l
    end

# The external encoding for standard input.
    def encoding
      @io.external_encoding
    end
  end

begin
    require "readline"
    class ReadlineInputMethod < InputMethod
      include Readline
      # Creates a new input method object using Readline
      def initialize
	super

@line_no = 0
	@line = []
	@eof = false

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

# Reads the next line from this input method.
      #
      # See IO#gets for more information.
      def gets
        Readline.input = @stdin
        Readline.output = @stdout
	if l = readline(@prompt, false)
	  HISTORY.push(l) if !l.empty?
	  @line[@line_no += 1] = l + "\n"
	else
	  @eof = true
	  l
	end
      end

# Whether the end of this input method has been reached, returns +true+
      # if there is no more data to read.
      #
      # See IO#eof? for more information.
      def eof?
	@eof
      end

# Whether this input method is still readable when there is no more data to
      # read.
      #
      # See IO#eof for more information.
      def readable_after_eof?
	true
      end

# Returns the current line number for #io.
      #
      # #line counts the number of times #gets is called.
      #
      # See IO#lineno for more information.
      def line(line_no)
	@line[line_no]
      end

# The external encoding for standard input.
      def encoding
	@stdin.external_encoding
      end
    end
  rescue LoadError
  end
end

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