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#
# irb/input-method.rb - input methods used irb
# $Release Version: 0.9.5$
# $Revision: 11708 $
# $Date: 2007-02-13 08:01:19 +0900 (Tue, 13 Feb 2007) $
# by Keiju ISHITSUKA(keiju@ruby-lang.org)
#
# --
#
#
#
module IRB
#
# InputMethod
# StdioInputMethod
# FileInputMethod
# (ReadlineInputMethod)
#
STDIN_FILE_NAME = "(line)"
class InputMethod
@RCS_ID='-$Id: input-method.rb 11708 2007-02-12 23:01:19Z shyouhei $-'
def initialize(file = STDIN_FILE_NAME)
@file_name = file
end
attr_reader :file_name
attr_accessor :prompt
def gets
IRB.fail NotImplementedError, "gets"
end
public :gets
def readable_atfer_eof?
false
end
end
class StdioInputMethod < InputMethod
def initialize
super
@line_no = 0
@line = []
end
def gets
print @prompt
@line[@line_no += 1] = $stdin.gets
end
def eof?
$stdin.eof?
end
def readable_atfer_eof?
true
end
def line(line_no)
@line[line_no]
end
end
class FileInputMethod < InputMethod
def initialize(file)
super
@io = open(file)
end
attr_reader :file_name
def eof?
@io.eof?
end
def gets
print @prompt
l = @io.gets
# print @prompt, l
l
end
end
begin
require "readline"
class ReadlineInputMethod < InputMethod
include Readline
def initialize
super
@line_no = 0
@line = []
@eof = false
end
def gets
if l = readline(@prompt, false)
HISTORY.push(l) if !l.empty?
@line[@line_no += 1] = l + "\n"
else
@eof = true
l
end
end
def eof?
@eof
end
def readable_atfer_eof?
true
end
def line(line_no)
@line[line_no]
end
end
rescue LoadError
end
end