Class: SpinalTap::History

Inherits:
Object
  • Object
show all
Defined in:
lib/spinal_tap/history.rb

Constant Summary collapse

MAX_LINES = 
100

Instance Method Summary collapse

Constructor Details

#initialize ⇒ History

Returns a new instance of History.



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# File 'lib/spinal_tap/history.rb', line 6

def initialize
  @history = ['']
  @history_pos = 0
end

Instance Method Details

#all ⇒ Object 



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# File 'lib/spinal_tap/history.rb', line 59

def all
  return @history[0..-2].map { |e| e.clone }
end

#append(cmd_line) ⇒ Object 



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# File 'lib/spinal_tap/history.rb', line 48

def append(cmd_line)
  @history.pop
  @history << cmd_line.clone
  @history << ''

  trim
  fast_forward

  return true
end

#current ⇒ Object 



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# File 'lib/spinal_tap/history.rb', line 11

def current
  cur = @history[@history_pos]
  cur = cur.clone unless last?

  return cur
end

#fast_forward ⇒ Object 



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# File 'lib/spinal_tap/history.rb', line 63

def fast_forward
  @history_pos = @history.length - 1

  return current
end

#last? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/spinal_tap/history.rb', line 44

def last?
  return @history_pos >= @history.length - 1
end

#next ⇒ Object 



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# File 'lib/spinal_tap/history.rb', line 35

def next
  if next?
    @history_pos += 1
    return current
  else
    return false
  end
end

#next? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/spinal_tap/history.rb', line 31

def next?
  return @history_pos < @history.length - 1
end

#previous ⇒ Object 



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# File 'lib/spinal_tap/history.rb', line 22

def previous
  if previous?
    @history_pos -= 1
    return current
  else
    return false
  end
end

#previous? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/spinal_tap/history.rb', line 18

def previous?
  return @history_pos > 0
end