Class: Spiral::Textbox

Inherits:
Object
  • Object
show all
Defined in:
lib/spiral/textbox.rb

Instance Method Summary collapse

Constructor Details

#initialize(input = $stdin) ⇒ Textbox

Returns a new instance of Textbox.



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# File 'lib/spiral/textbox.rb', line 2

def initialize(input=$stdin)
  @input = input
end

Instance Method Details

#main ⇒ Object 



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# File 'lib/spiral/textbox.rb', line 30

def main
  @input.raw do |io|
    yield @string = ""

    return if catch(:exit) do
      io.chars do |ch|
        prev = @string.dup
        result = process(ch)
        next if !(Symbol === result) && result == prev
        yield result
      end
    end
  end
end

#process(ch) ⇒ Object 



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# File 'lib/spiral/textbox.rb', line 6

def process(ch)
  case ch
  when "\027" # <C-W>
    @string = @string.rstrip.split(/\b/)[0...-1].join
  when "\b"
    @string = @string.split(//)[0...-1].join
  when "\r"
  when "\003", "\004"
    throw :exit
  when "\x10" # <C-p>
    return :prev
  when "\x0e" # <C-n>
    return :next
  else
    case ch
    when /[^[:cntrl:]]/
      @string += ch
    else
    end
  end

  @string
end