Module: SassListen::FSM

Included in:
Listener
Defined in:
lib/sass-listen/fsm.rb

Defined Under Namespace

Modules: ClassMethods Classes: State

Constant Summary collapse

DEFAULT_STATE =

Default state name unless one is explicitly set

:default

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#state ⇒ Object (readonly)

Obtain the current state of the FSM



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# File 'lib/sass-listen/fsm.rb', line 52

def state
  @state
end

Class Method Details

.included(klass) ⇒ Object

Included hook to extend class methods



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# File 'lib/sass-listen/fsm.rb', line 7

def self.included(klass)
  klass.send :extend, ClassMethods
end

Instance Method Details

#initialize ⇒ Object

Be kind and call super if you must redefine initialize



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# File 'lib/sass-listen/fsm.rb', line 47

def initialize
  @state = self.class.default_state
end

#transition(state_name) ⇒ Object 



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# File 'lib/sass-listen/fsm.rb', line 54

def transition(state_name)
  new_state = validate_and_sanitize_new_state(state_name)
  return unless new_state
  transition_with_callbacks!(new_state)
end

#transition!(state_name) ⇒ Object

Immediate state transition with no checks, or callbacks. “Dangerous!”



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# File 'lib/sass-listen/fsm.rb', line 61

def transition!(state_name)
  @state = state_name
end