Class: Leg::DiffTransformers::OmitAdjacentRemovals

Inherits:
BaseTransformer show all
Defined in:
lib/leg/diff_transformers/omit_adjacent_removals.rb

Instance Method Summary collapse

Methods inherited from BaseTransformer

#initialize

Constructor Details

This class inherits a constructor from Leg::DiffTransformers::BaseTransformer

Instance Method Details

#transform(diff) ⇒ Object 



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# File 'lib/leg/diff_transformers/omit_adjacent_removals.rb', line 4

def transform(diff)
  new_diff = diff.clone

  removed_lines = []
  saw_added_line = false
  new_diff.lines.each.with_index do |line, idx|
    case line.type
    when :unchanged, :folded
      if saw_added_line
        removed_lines.each do |removed_idx|
          new_diff.lines[removed_idx] = nil
        end
      end

      removed_lines = []
      saw_added_line = false
    when :added
      saw_added_line = true
    when :removed
      removed_lines << idx
    end
  end

  if saw_added_line
    removed_lines.each do |removed_idx|
      new_diff.lines[removed_idx] = nil
    end
  end

  new_diff.lines.compact!
  new_diff
end