Class: GitSpelunk::Offset::Chunk

Inherits:
Object
  • Object
show all
Defined in:
lib/git_spelunk/offset.rb

Defined Under Namespace

Classes: LineBlock

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(data) ⇒ Chunk

Returns a new instance of Chunk.



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# File 'lib/git_spelunk/offset.rb', line 54

def initialize(data)
  @minus_offset, @minus_length, @plus_offset, @plus_length = *extract_stats(data[0])
  @lines = data[1..-1]
end

Instance Attribute Details

#lines ⇒ Object (readonly)

Returns the value of attribute lines.



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# File 'lib/git_spelunk/offset.rb', line 52

def lines
  @lines
end

#minus_length ⇒ Object (readonly)

Returns the value of attribute minus_length.



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# File 'lib/git_spelunk/offset.rb', line 52

def minus_length
  @minus_length
end

#minus_offset ⇒ Object (readonly)

Returns the value of attribute minus_offset.



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# File 'lib/git_spelunk/offset.rb', line 52

def minus_offset
  @minus_offset
end

#plus_length ⇒ Object (readonly)

Returns the value of attribute plus_length.



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# File 'lib/git_spelunk/offset.rb', line 52

def plus_length
  @plus_length
end

#plus_offset ⇒ Object (readonly)

Returns the value of attribute plus_offset.



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# File 'lib/git_spelunk/offset.rb', line 52

def plus_offset
  @plus_offset
end

Instance Method Details

#find_parent_line_number(target) ⇒ Object 



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# File 'lib/git_spelunk/offset.rb', line 81

def find_parent_line_number(target)
  # separate in blocks of lines with the same prefix

  old_line_number = minus_offset
  new_line_number = plus_offset

  blocks = []
  lines.each do |l|
    next if l =~ /\\ No newline at end of file/
    last_block = blocks.last

    if last_block.nil? || last_block.type != l[0]
      blocks << LineBlock.new(old_line_number, l)
    else
      last_block << l
    end

    if l[0] == "+" || l[0] == " "
      if new_line_number == target
        # important: we don't finish building the structure.
        break
      end

      new_line_number += 1
    end

    if l[0] == "-" || l[0] == " "
      old_line_number += 1
    end
  end

  addition_block = blocks.pop
  last_old_block = blocks.last

  if last_old_block.type == " "
    last_old_block.offset + (last_old_block.size - 1)
  else
    # offset N lines into last block, but don't go beyond the edge of it.
    last_old_block.offset + [addition_block.size - 1, last_old_block.size].min
  end
end

#has_line?(line_number) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/git_spelunk/offset.rb', line 59

def has_line?(line_number)
  plus_offset <= line_number && line_number <= (plus_offset + plus_length)
end