Class: Annals

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(max = 20, &block) ⇒ Annals

Returns a new instance of Annals.



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# File 'lib/annals.rb', line 5

def initialize(max = 20, &block)
  @max = max
  if block_given?
    @trace_func = block
  else
    @trace_func = lambda { |event, file, line, id, binding, classname|
      if event == 'call'
        unshift(:file => file, :line => line, :method => "in #{id}")
      end
    }
  end
  start
end

Instance Attribute Details

#buffer ⇒ Object

Returns the value of attribute buffer.



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# File 'lib/annals.rb', line 3

def buffer
  @buffer
end

#max ⇒ Object

Returns the value of attribute max.



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# File 'lib/annals.rb', line 3

def max
  @max
end

Instance Method Details

#capture(&block) ⇒ Object 



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# File 'lib/annals.rb', line 19

def capture(&block)
  start
  yield
  stop
end

#lines ⇒ Object 



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# File 'lib/annals.rb', line 25

def lines
  @buffer.map {|event| "#{event[:file]}:#{event[:line]} #{event[:method]}"}
end

#print_lines ⇒ Object 



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# File 'lib/annals.rb', line 29

def print_lines
  for line in lines
    puts(line)
  end
end

#start ⇒ Object 



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# File 'lib/annals.rb', line 35

def start
  @buffer = []
  @size   = 0
  Kernel.set_trace_func(@trace_func)
  true
end

#stop ⇒ Object 



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# File 'lib/annals.rb', line 42

def stop
  Kernel.set_trace_func(lambda {})
  @buffer.shift # remove Annals#stop from buffer
  true
end

#unshift(line) ⇒ Object 



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# File 'lib/annals.rb', line 48

def unshift(line)
  if @size == @max
    @buffer.pop
  else
    @size += 1
  end
  @buffer.unshift(line)
end