Class: PryNav::Tracer

Inherits:
Object
  • Object
show all
Defined in:
lib/pry-nav/tracer.rb

Instance Method Summary collapse

Constructor Details

#initialize(pry_start_options = {}) ⇒ Tracer

Returns a new instance of Tracer.



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# File 'lib/pry-nav/tracer.rb', line 5

def initialize(pry_start_options = {})
  @step_in_lines = -1                      # Break after this many lines
  @frames_when_stepping = nil              # Only break at this frame level
  @frames = 0                              # Traced stack frame level
  @pry_start_options = pry_start_options   # Options to use for Pry.start
end

Instance Method Details

#process_command(command = {}) ⇒ Object 



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# File 'lib/pry-nav/tracer.rb', line 42

def process_command(command = {})
  times = (command[:times] || 1).to_i
  times = 1 if times <= 0

  case command[:action]
  when :step
    @step_in_lines = times
    @frames_when_stepping = nil
    true
  when :next
    @step_in_lines = times
    @frames_when_stepping = @frames
    true
  else
    false
  end
end

#run ⇒ Object 



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# File 'lib/pry-nav/tracer.rb', line 12

def run
  # For performance, disable any tracers while in the console.
  stop

  return_value = nil
  command = catch(:breakout_nav) do      # Coordinates with PryNav::Commands
    return_value = yield
    {}    # Nothing thrown == no navigational command
  end

  # Adjust tracer based on command
  if process_command(command)
    start
  else
    if @pry_start_options[:pry_remote] && PryNav.current_remote_server
      PryNav.current_remote_server.teardown
    end
  end

  return_value
end

#start ⇒ Object 



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# File 'lib/pry-nav/tracer.rb', line 34

def start
  set_trace_func method(:tracer).to_proc
end

#stop ⇒ Object 



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# File 'lib/pry-nav/tracer.rb', line 38

def stop
  set_trace_func nil
end