1#@!#!123s

: / opt / td-agent / embedded / lib / ruby / gems / 2.1.0 / gems / diff-lcs-1.3 / lib / diff / lcs /

Filename : block.rb

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# -*- ruby encoding: utf-8 -*-

# A block is an operation removing, adding, or changing a group of items.
# Basically, this is just a list of changes, where each change adds or
# deletes a single item. Used by bin/ldiff.
class Diff::LCS::Block
  attr_reader :changes, :insert, :remove

  def initialize(chunk)
    @changes = []
    @insert = []
    @remove = []

    chunk.each do |item|
      @changes << item
      @remove << item if item.deleting?
      @insert << item if item.adding?
    end
  end

  def diff_size
    @insert.size - @remove.size
  end

  def op
    case [@remove.empty?, @insert.empty?]
    when [false, false]
      '!'
    when [false, true]
      '-'
    when [true, false]
      '+'
    else # [true, true]
      '^'
    end
  end
end