Class: MotionSupport::Callbacks::Callback

Inherits:
Object
  • Object
show all
Defined in:
motion/callbacks.rb

Overview

:nodoc:#

Constant Summary collapse

@@_callback_sequence = 
0

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(chain, filter, kind, options, klass) ⇒ Callback

Returns a new instance of Callback.


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# File 'motion/callbacks.rb', line 89

def initialize(chain, filter, kind, options, klass)
  @chain, @kind, @klass = chain, kind, klass
  normalize_options!(options)

  @raw_filter, @options = filter, options
  @filter               = _compile_filter(filter)
  recompile_options!
end

Instance Attribute Details

#chain ⇒ Object

Returns the value of attribute chain


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# File 'motion/callbacks.rb', line 87

def chain
  @chain
end

#filter ⇒ Object

Returns the value of attribute filter


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# File 'motion/callbacks.rb', line 87

def filter
  @filter
end

#kind ⇒ Object

Returns the value of attribute kind


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# File 'motion/callbacks.rb', line 87

def kind
  @kind
end

#klass ⇒ Object

Returns the value of attribute klass


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# File 'motion/callbacks.rb', line 87

def klass
  @klass
end

#options ⇒ Object

Returns the value of attribute options


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# File 'motion/callbacks.rb', line 87

def options
  @options
end

#raw_filter ⇒ Object

Returns the value of attribute raw_filter


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# File 'motion/callbacks.rb', line 87

def raw_filter
  @raw_filter
end

Instance Method Details

#_update_filter(filter_options, new_options) ⇒ Object 


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# File 'motion/callbacks.rb', line 129

def _update_filter(filter_options, new_options)
  filter_options[:if].concat(Array(new_options[:unless])) if new_options.key?(:unless)
  filter_options[:unless].concat(Array(new_options[:if])) if new_options.key?(:if)
end

#apply(code) ⇒ Object

Wraps code with filter


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# File 'motion/callbacks.rb', line 141

def apply(code)
  case @kind
  when :before
    lambda do |obj, value, halted|
      if !halted && @compiled_options.call(obj)
        result = @filter.call(obj)
        
        halted = chain.config[:terminator].call(result)
        if halted
          obj.halted_callback_hook(@raw_filter.inspect)
        end
      end
      code.call(obj, value, halted)
    end
  when :after
    lambda do |obj, value, halted|
      value, halted = *(code.call(obj, value, halted))
      if (!chain.config[:skip_after_callbacks_if_terminated] || !halted) && @compiled_options.call(obj)
        @filter.call(obj)
      end
      [value, halted]
    end
  when :around
    lambda do |obj, value, halted|
      if @compiled_options.call(obj) && !halted
        @filter.call(obj) do
          value, halted = *(code.call(obj, value, halted))
          value
        end
      else
        value, halted = *(code.call(obj, value, halted))
        value
      end
      [value, halted]
    end
  end
end

#clone(chain, klass) ⇒ Object 


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# File 'motion/callbacks.rb', line 98

def clone(chain, klass)
  obj                  = super()
  obj.chain            = chain
  obj.klass            = klass
  obj.options          = @options.dup
  obj.options[:if]     = @options[:if].dup
  obj.options[:unless] = @options[:unless].dup
  obj
end

#duplicates?(other) ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'motion/callbacks.rb', line 125

def duplicates?(other)
  matches?(other.kind, other.raw_filter)
end

#matches?(_kind, _filter) ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'motion/callbacks.rb', line 121

def matches?(_kind, _filter)
  @kind == _kind && @raw_filter == _filter
end

#name ⇒ Object 


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# File 'motion/callbacks.rb', line 113

def name
  chain.name
end

#next_id ⇒ Object 


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# File 'motion/callbacks.rb', line 117

def next_id
  @@_callback_sequence += 1
end

#normalize_options!(options) ⇒ Object 


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# File 'motion/callbacks.rb', line 108

def normalize_options!(options)
  options[:if] = Array(options[:if])
  options[:unless] = Array(options[:unless])
end

#recompile!(_options) ⇒ Object 


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# File 'motion/callbacks.rb', line 134

def recompile!(_options)
  _update_filter(self.options, _options)

  recompile_options!
end