123 lines
1.8 KiB
Ruby
123 lines
1.8 KiB
Ruby
#
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# irb/input-method.rb - input methods used irb
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# $Release Version: 0.9.5$
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# $Revision$
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# $Date$
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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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module IRB
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#
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# InputMethod
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# StdioInputMethod
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# FileInputMethod
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# (ReadlineInputMethod)
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#
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STDIN_FILE_NAME = "(line)"
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class InputMethod
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@RCS_ID='-$Id$-'
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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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attr_reader :file_name
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attr_accessor :prompt
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def gets
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IRB.fail NotImplementedError, "gets"
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end
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public :gets
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def readable_atfer_eof?
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false
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end
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end
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class StdioInputMethod < InputMethod
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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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end
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def gets
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print @prompt
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@line[@line_no += 1] = $stdin.gets
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end
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def eof?
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$stdin.eof?
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end
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def readable_atfer_eof?
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true
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end
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def line(line_no)
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@line[line_no]
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end
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end
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class FileInputMethod < InputMethod
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def initialize(file)
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super
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@io = open(file)
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end
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attr_reader :file_name
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def eof?
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@io.eof?
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end
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def gets
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print @prompt
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l = @io.gets
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# print @prompt, l
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l
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end
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end
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begin
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require "readline"
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class ReadlineInputMethod < InputMethod
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include Readline
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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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@eof = false
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end
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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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def eof?
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@eof
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end
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def readable_atfer_eof?
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true
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end
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def line(line_no)
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@line[line_no]
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end
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end
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rescue LoadError
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end
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end
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