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Dir : ~/lib/ruby/gems/3.0.0/gems/rbs-1.0.4/lib/rbs/

View File Name : buffer.rb

module RBS
  class Buffer
    attr_reader :name
    attr_reader :content
    attr_reader :lines
    attr_reader :ranges

    def initialize(name:, content:)
      @name = name
      @content = content

      @lines = content.lines

      @ranges = []
      offset = 0
      lines.each do |line|
        size = line.size
        range = offset...(offset+size)
        ranges << range
        offset += size
      end
    end

    def pos_to_loc(pos)
      index = ranges.bsearch_index do |range|
        pos < range.end ? true : false
      end

      if index
        [index + 1, pos - ranges[index].begin]
      else
        [ranges.size + 1, 0]
      end
    end

    def loc_to_pos(loc)
      line, column = loc

      if range = ranges[line - 1]
        range.begin + column
      else
        last_position
      end
    end

    def last_position
      content.size
    end
  end
end