Class: Switcher::Statement

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(instance, spec, state_current = nil, state_prev = nil) ⇒ Statement

Returns a new instance of Statement.



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# File 'lib/switcher/statement.rb', line 3

def initialize(instance, spec, state_current=nil, state_prev=nil)
  @instance = instance

  @spec = spec

  @state_prev    = state_prev
  @state_current = state_current
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/switcher/statement.rb', line 12

def name
  @name
end

#states ⇒ Object (readonly)

Returns the value of attribute states.



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# File 'lib/switcher/statement.rb', line 12

def states
  @states
end

Instance Method Details

#force_state(state) ⇒ Object 



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# File 'lib/switcher/statement.rb', line 54

def force_state(state)
  return unless @spec.states_list.include?(state.to_sym) # FIXME - raise exception
  @state_prev    = state_current
  @state_current = state.to_sym
end

#publish(event, original, args) ⇒ Object 



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# File 'lib/switcher/statement.rb', line 22

def publish(event, original, args)
  states = @spec.states
  state  = state_current

  return unless states.has_key?(state)

  facade = Facade.new(original, args)

  ["before_#{event}", event.to_s].each do |ev|
    states[state].trigger(ev, facade, @instance, args)
  end

  set_state(facade)

  states[state].trigger("after_#{event}", facade, @instance, args)

  return if facade.bubble_cancelled

  if @spec.targets.length > 0
    @spec.targets.each do |target|
      target_instance = @instance.send(target.to_sym)
      if target_instance.respond_to?(:each)
        target_instance.each do |ti|
          ti.switch_from(original, event, args) if ti.respond_to?(:switch_from)
        end
      else
        target_instance.switch_from(original, event, args) if target_instance.respond_to?(:switch_from)
      end
    end
  end
end

#state_current ⇒ Object 



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# File 'lib/switcher/statement.rb', line 14

def state_current
  (@state_current || @spec.states_list.first).to_sym
end

#state_prev ⇒ Object 



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# File 'lib/switcher/statement.rb', line 18

def state_prev
  @state_prev ? @state_prev.to_sym : nil
end