Class: RBS::AST::Ruby::CommentBlock

Inherits:
Object
  • Object
show all
Defined in:
lib/rbs/ast/ruby/comment_block.rb

Constant Summary collapse

AnnotationSyntaxError = 
_ = Struct.new(:location, :error)

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(source_buffer, comments) ⇒ CommentBlock

Returns a new instance of CommentBlock.



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# File 'lib/rbs/ast/ruby/comment_block.rb', line 9

def initialize(source_buffer, comments)
  @name = source_buffer.name

  @offsets = []

  # Assume the comment starts with a prefix whitespace
  prefix_str = "# "

  ranges = [] #: Array[Range[Integer]]

  comments.each do |comment|
    tuple = [comment, 2] #: [Prism::Comment, Integer]

    unless comment.location.slice.start_with?(prefix_str)
      tuple[1] = 1
    end

    offsets << tuple

    start_char = comment.location.start_character_offset + tuple[1]
    end_char = comment.location.end_character_offset
    ranges << (start_char ... end_char)
  end

  @comment_buffer = source_buffer.sub_buffer(lines: ranges)
end

Instance Attribute Details

#comment_buffer ⇒ Object (readonly)

Returns the value of attribute comment_buffer.



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# File 'lib/rbs/ast/ruby/comment_block.rb', line 7

def comment_buffer
  @comment_buffer
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/rbs/ast/ruby/comment_block.rb', line 7

def name
  @name
end

#offsets ⇒ Object (readonly)

Returns the value of attribute offsets.



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# File 'lib/rbs/ast/ruby/comment_block.rb', line 7

def offsets
  @offsets
end

Class Method Details

.build(buffer, comments) ⇒ Object 



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# File 'lib/rbs/ast/ruby/comment_block.rb', line 60

def self.build(buffer, comments)
  blocks = [] #: Array[CommentBlock]

  comments = comments.filter {|comment| comment.is_a?(Prism::InlineComment) }

  until comments.empty?
    block_comments = [] #: Array[Prism::Comment]

    until comments.empty?
      comment = comments.first or raise
      last_comment = block_comments.last

      if last_comment
        if last_comment.location.end_line + 1 == comment.location.start_line
          if last_comment.location.start_column == comment.location.start_column
            unless comment.location.start_line_slice.index(/\S/)
              block_comments << comments.shift
              next
            end
          end
        end

        break
      else
        block_comments << comments.shift
      end
    end

    unless block_comments.empty?
      blocks << CommentBlock.new(buffer, block_comments.dup)
    end
  end

  blocks
end

Instance Method Details

#as_comment ⇒ Object 



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# File 'lib/rbs/ast/ruby/comment_block.rb', line 226

def as_comment
  lines = [] #: Array[String]

  each_paragraph([]) do |paragraph|
    case paragraph
    when Location
      lines << paragraph.local_source
    end
  end

  string = lines.join("\n")

  unless string.strip.empty?
    AST::Comment.new(string: string, location: location)
  end
end

#comments ⇒ Object 



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# File 'lib/rbs/ast/ruby/comment_block.rb', line 211

def comments
  offsets.map { _1[0]}
end

#each_paragraph(variables, &block) ⇒ Object 



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# File 'lib/rbs/ast/ruby/comment_block.rb', line 98

def each_paragraph(variables, &block)
  if block
    if leading_annotation?(0)
      yield_annotation(0, 0, 0, variables, &block)
    else
      yield_paragraph(0, 0, variables, &block)
    end
  else
    enum_for :each_paragraph, variables
  end
end

#end_line ⇒ Object 



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# File 'lib/rbs/ast/ruby/comment_block.rb', line 50

def end_line
  comments[-1].location.end_line
end

#leading? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rbs/ast/ruby/comment_block.rb', line 36

def leading?
  comment = offsets[0][0] or raise
  comment.location.start_line_slice.index(/\S/) ? false : true
end

#leading_annotation?(index) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rbs/ast/ruby/comment_block.rb', line 215

def leading_annotation?(index)
  if index < comment_buffer.line_count
    text(index).start_with?(/@rbs\b/) and return true

    comment = offsets[index][0]
    comment.location.slice.start_with?(/\#:/) and return true
  end

  false
end

#line_location(start_line, end_line) ⇒ Object 



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# File 'lib/rbs/ast/ruby/comment_block.rb', line 174

def line_location(start_line, end_line)
  start_offset = comment_buffer.ranges[start_line].begin
  end_offset = comment_buffer.ranges[end_line].end
  Location.new(comment_buffer, start_offset, end_offset)
end

#line_starts ⇒ Object 



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# File 'lib/rbs/ast/ruby/comment_block.rb', line 54

def line_starts
  offsets.map do |comment, prefix_size|
    comment.location.start_character_offset + prefix_size
  end
end

#location ⇒ Object 



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# File 'lib/rbs/ast/ruby/comment_block.rb', line 180

def location()
  first_comment = comments[0] or raise
  last_comment = comments[-1] or raise

  comment_buffer.rbs_location(first_comment.location.join last_comment.location)
end

#parse_annotation_lines(start_line, end_line, variables) ⇒ Object 



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# File 'lib/rbs/ast/ruby/comment_block.rb', line 187

def parse_annotation_lines(start_line, end_line, variables)
  start_pos = comment_buffer.ranges[start_line].begin
  end_pos = comment_buffer.ranges[end_line].end
  begin
    Parser.parse_inline_leading_annotation(comment_buffer, start_pos...end_pos, variables: variables)
  rescue ParsingError => error
    AnnotationSyntaxError.new(line_location(start_line, end_line), error)
  end
end

#start_line ⇒ Object 



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# File 'lib/rbs/ast/ruby/comment_block.rb', line 46

def start_line
  comments[0].location.start_line
end

#text(comment_index) ⇒ Object 



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# File 'lib/rbs/ast/ruby/comment_block.rb', line 169

def text(comment_index)
  range = comment_buffer.ranges[comment_index]
  comment_buffer.content[range] or raise
end

#trailing? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rbs/ast/ruby/comment_block.rb', line 41

def trailing?
  comment = offsets[0][0] or raise
  comment.location.start_line_slice.index(/\S/) ? true : false
end

#trailing_annotation(variables) ⇒ Object 



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# File 'lib/rbs/ast/ruby/comment_block.rb', line 197

def trailing_annotation(variables)
  if trailing?
    comment = comments[0] or raise
    if comment.location.slice.start_with?(/#[:\[]/)
      begin
        Parser.parse_inline_trailing_annotation(comment_buffer, 0...comment_buffer.last_position, variables: variables)
      rescue ParsingError => error
        location = line_location(0, offsets.size - 1)
        AnnotationSyntaxError.new(location, error)
      end
    end
  end
end

#yield_annotation(start_line, end_line, current_line, variables, &block) ⇒ Object 



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# File 'lib/rbs/ast/ruby/comment_block.rb', line 130

def yield_annotation(start_line, end_line, current_line, variables, &block)
  # We already know at start_line..end_line are annotation.
  while true
    next_line = current_line + 1

    if next_line >= comment_buffer.line_count
      annotation = parse_annotation_lines(start_line, end_line, variables)
      yield annotation

      if end_line > current_line
        yield_paragraph(end_line + 1, end_line + 1, variables, &block)
      end

      return
    end

    line_text = text(next_line)
    if leading_spaces = line_text.index(/\S/)
      if leading_spaces == 0
        # End of annotation
        yield parse_annotation_lines(start_line, end_line, variables)

        if leading_annotation?(end_line + 1)
          yield_annotation(end_line + 1, end_line + 1, end_line + 1, variables, &block)
        else
          yield_paragraph(end_line + 1, end_line + 1, variables, &block)
        end

        return
      else
        current_line = next_line
        end_line = next_line
      end
    else
      current_line = next_line
    end
  end
end

#yield_paragraph(start_line, current_line, variables, &block) ⇒ Object 



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# File 'lib/rbs/ast/ruby/comment_block.rb', line 110

def yield_paragraph(start_line, current_line, variables, &block)
  # We already know at start_line..current_line are paragraph.

  while true
    next_line = current_line + 1

    if next_line >= comment_buffer.line_count
      yield line_location(start_line, current_line)
      return
    end

    if leading_annotation?(next_line)
      yield line_location(start_line, current_line)
      return yield_annotation(next_line, next_line, next_line, variables, &block)
    else
      current_line = next_line
    end
  end
end