Class: SuperDiff::OperationalSequencers::Array::LcsCallbacks

Inherits:
Object
  • Object
show all
Defined in:
lib/super_diff/operational_sequencers/array.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(expected:, actual:, extra_operational_sequencer_classes:, extra_diff_formatter_classes:) ⇒ LcsCallbacks

Returns a new instance of LcsCallbacks.



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# File 'lib/super_diff/operational_sequencers/array.rb', line 31

def initialize(
  expected:,
  actual:,
  extra_operational_sequencer_classes:,
  extra_diff_formatter_classes:
)
  @expected = expected
  @actual = actual
  @operations = OperationSequences::Array.new([])
  @extra_operational_sequencer_classes =
    extra_operational_sequencer_classes
  @extra_diff_formatter_classes = extra_diff_formatter_classes
end

Instance Attribute Details

#operations ⇒ Object (readonly)

Returns the value of attribute operations.



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# File 'lib/super_diff/operational_sequencers/array.rb', line 29

def operations
  @operations
end

Instance Method Details

#change(event) ⇒ Object 



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# File 'lib/super_diff/operational_sequencers/array.rb', line 75

def change(event)
  child_operations = sequence(event.old_element, event.new_element)

  if child_operations
    operations << ::SuperDiff::Operations::BinaryOperation.new(
      name: :change,
      left_collection: expected,
      right_collection: actual,
      left_key: event.old_position,
      right_key: event.new_position,
      left_value: event.old_element,
      right_value: event.new_element,
      left_index: event.old_position,
      right_index: event.new_position,
      child_operations: child_operations,
    )
  else
    operations << Operations::UnaryOperation.new(
      name: :delete,
      collection: expected,
      key: event.old_position,
      value: event.old_element,
      index: event.old_position,
    )
    operations << Operations::UnaryOperation.new(
      name: :insert,
      collection: actual,
      key: event.new_position,
      value: event.new_element,
      index: event.new_position,
    )
  end
end

#discard_a(event) ⇒ Object 



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# File 'lib/super_diff/operational_sequencers/array.rb', line 55

def discard_a(event)
  operations << ::SuperDiff::Operations::UnaryOperation.new(
    name: :delete,
    collection: expected,
    key: event.old_position,
    value: event.old_element,
    index: event.old_position,
  )
end

#discard_b(event) ⇒ Object 



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# File 'lib/super_diff/operational_sequencers/array.rb', line 65

def discard_b(event)
  operations << ::SuperDiff::Operations::UnaryOperation.new(
    name: :insert,
    collection: actual,
    key: event.new_position,
    value: event.new_element,
    index: event.new_position,
  )
end

#match(event) ⇒ Object 



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# File 'lib/super_diff/operational_sequencers/array.rb', line 45

def match(event)
  operations << ::SuperDiff::Operations::UnaryOperation.new(
    name: :noop,
    collection: actual,
    key: event.new_position,
    value: event.new_element,
    index: event.new_position,
  )
end