Class: Goodcheck::Buffer

Inherits:
Object
  • Object
show all
Defined in:
lib/goodcheck/buffer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(path:, content:) ⇒ Buffer

Returns a new instance of Buffer.



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# File 'lib/goodcheck/buffer.rb', line 6

def initialize(path:, content:)
  @path = path
  @content = content
end

Instance Attribute Details

#content ⇒ Object (readonly)

Returns the value of attribute content.



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# File 'lib/goodcheck/buffer.rb', line 4

def content
  @content
end

#path ⇒ Object (readonly)

Returns the value of attribute path.



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# File 'lib/goodcheck/buffer.rb', line 3

def path
  @path
end

Instance Method Details

#line(line_number) ⇒ Object 



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# File 'lib/goodcheck/buffer.rb', line 37

def line(line_number)
  content.lines[line_number-1]
end

#line_ranges ⇒ Object 



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# File 'lib/goodcheck/buffer.rb', line 11

def line_ranges
  unless @line_ranges
    @line_ranges = []

    start_position = 0

    content.split(/\n/, -1).each do |line|
      range = start_position...(start_position + line.bytesize)
      @line_ranges << range
      start_position = range.end + 1
    end
  end

  @line_ranges
end

#location_for_position(position) ⇒ Object 



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# File 'lib/goodcheck/buffer.rb', line 27

def location_for_position(position)
  line_index = line_ranges.bsearch_index do |range|
    position <= range.end
  end

  if line_index
    [line_index + 1, position - line_ranges[line_index].begin]
  end
end

#position_for_location(line, column) ⇒ Object 



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# File 'lib/goodcheck/buffer.rb', line 41

def position_for_location(line, column)
  if (range = line_ranges[line-1])
    pos = range.begin + column
    if pos <= range.end
      pos
    end
  end
end