Class: Textbringer::Ring

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/textbringer/ring.rb

Instance Method Summary collapse

Constructor Details

#initialize(max = 30, on_delete: ->(x) {}) ⇒ Ring

Returns a new instance of Ring.



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# File 'lib/textbringer/ring.rb', line 5

def initialize(max = 30, on_delete: ->(x) {})
  @max = max
  @ring = []
  @current = -1
  @on_delete = on_delete
end

Instance Method Details

#[](n = 0) ⇒ Object 



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# File 'lib/textbringer/ring.rb', line 48

def [](n = 0)
  @ring[get_index(n)]
end

#clear ⇒ Object 



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# File 'lib/textbringer/ring.rb', line 12

def clear
  @ring.clear
  @current = -1
end

#current ⇒ Object 



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# File 'lib/textbringer/ring.rb', line 36

def current
  if @ring.empty?
    raise EditorError, "Ring is empty"
  end
  @ring[@current]
end

#each(&block) ⇒ Object 



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# File 'lib/textbringer/ring.rb', line 60

def each(&block)
  @ring.each(&block)
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/textbringer/ring.rb', line 52

def empty?
  @ring.empty?
end

#pop ⇒ Object 



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# File 'lib/textbringer/ring.rb', line 30

def pop
  x = @ring[@current]
  rotate(1)
  x
end

#push(obj) ⇒ Object 



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# File 'lib/textbringer/ring.rb', line 17

def push(obj)
  @current += 1
  if @ring.size < @max
    @ring.insert(@current, obj)
  else
    if @current == @max
      @current = 0
    end
    @on_delete.call(@ring[@current])
    @ring[@current] = obj
  end
end

#rotate(n) ⇒ Object 



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# File 'lib/textbringer/ring.rb', line 43

def rotate(n)
  @current = get_index(n)
  @ring[@current]
end

#size ⇒ Object 



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# File 'lib/textbringer/ring.rb', line 56

def size
  @ring.size
end

#to_a ⇒ Object 



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# File 'lib/textbringer/ring.rb', line 64

def to_a
  @ring.to_a
end