class RDoc::Comment

frozen_string_literal: true

A comment holds the text comment for a RDoc::CodeObject and provides a unified way of cleaning it up and parsing it into an RDoc::Markup::Document.

Each comment may have a different markup format set by format=. By default 'rdoc' is used. The :markup: directive tells RDoc which format to use.

See Other directives at RDoc::Markup for instructions on adding an alternate format.

Attributes

document[W]

Overrides the content returned by parse. Use when there is no text source for this comment

file[RW]

The RDoc::TopLevel this comment was found in

format[R]

The format of this comment. Defaults to RDoc::Markup

location[RW]

The RDoc::TopLevel this comment was found in

text[R]

The text for this comment

Public Class Methods

new(text = nil, location = nil) click to toggle source

Creates a new comment with text that is found in the RDoc::TopLevel location.

# File lib/rdoc/comment.rb, line 46
def initialize text = nil, location = nil
  @location = location
  @text     = text.nil? ? nil : text.dup

  @document   = nil
  @format     = 'rdoc'
  @normalized = false
end

Public Instance Methods

empty?() click to toggle source

A comment is empty if its text String is empty.

# File lib/rdoc/comment.rb, line 133
def empty?
  @text.empty?
end

encode!(encoding) click to toggle source

HACK dubious

# File lib/rdoc/comment.rb, line 140
def encode! encoding
  # TODO: Remove this condition after Ruby 2.2 EOL
  if RUBY_VERSION < '2.3.0'
    @text = @text.force_encoding encoding
  else
    @text = String.new @text, encoding: encoding
  end
  self
end

extract_call_seq(method) click to toggle source

Look for a 'call-seq' in the comment to override the normal parameter handling. The :call-seq: is indented from the baseline. All lines of the same indentation level and prefix are consumed.

For example, all of the following will be used as the :call-seq:

# :call-seq:
#   ARGF.readlines(sep=$/)     -> array
#   ARGF.readlines(limit)      -> array
#   ARGF.readlines(sep, limit) -> array
#
#   ARGF.to_a(sep=$/)     -> array
#   ARGF.to_a(limit)      -> array
#   ARGF.to_a(sep, limit) -> array

# File lib/rdoc/comment.rb, line 84
def extract_call_seq method
  # we must handle situations like the above followed by an unindented first
  # comment.  The difficulty is to make sure not to match lines starting
  # with ARGF at the same indent, but that are after the first description
  # paragraph.
  if @text =~ /^\s*:?call-seq:(.*?(?:\S).*?)^\s*$/m then
    all_start, all_stop = $~.offset(0)
    seq_start, seq_stop = $~.offset(1)

    # we get the following lines that start with the leading word at the
    # same indent, even if they have blank lines before
    if $1 =~ /(^\s*\n)+^(\s*\w+)/m then
      leading = $2 # ' *    ARGF' in the example above
      re = %r%
        \A(
           (^\s*\n)+
           (^#{Regexp.escape leading}.*?\n)+
          )+
        ^\s*$
      %xm

      if @text[seq_stop..-1] =~ re then
        all_stop = seq_stop + $~.offset(0).last
        seq_stop = seq_stop + $~.offset(1).last
      end
    end

    seq = @text[seq_start..seq_stop]
    seq.gsub!(/^\s*(\S|\n)/m, '\1')
    @text.slice! all_start...all_stop

    method.call_seq = seq.chomp

  else
    regexp = /^\s*:?call-seq:(.*?)(^\s*$|\z)/m
    if regexp =~ @text then
      @text = @text.sub(regexp, '')
      seq = $1
      seq.gsub!(/^\s*/, '')
      method.call_seq = seq
    end
  end

  method
end

format=(format) click to toggle source

Sets the format of this comment and resets any parsed document

# File lib/rdoc/comment.rb, line 153
def format= format
  @format = format
  @document = nil
end

normalize() click to toggle source

Normalizes the text. See RDoc::Text#normalize_comment for details

# File lib/rdoc/comment.rb, line 167
def normalize
  return self unless @text
  return self if @normalized # TODO eliminate duplicate normalization

  @text = normalize_comment @text

  @normalized = true

  self
end

parse() click to toggle source

Parses the comment into an RDoc::Markup::Document. The parsed document is cached until the text is changed.

Calls superclass method RDoc::Text#parse

# File lib/rdoc/comment.rb, line 189
def parse
  return @document if @document

  @document = super @text, @format
  @document.file = @location
  @document
end

remove_private() click to toggle source

Removes private sections from this comment. Private sections are flush to the comment marker and start with -- and end with ++. For C-style comments, a private marker may not start at the opening of the comment.

*--
* private
*++
* public

# File lib/rdoc/comment.rb, line 210
def remove_private
  # Workaround for gsub encoding for Ruby 1.9.2 and earlier
  empty = ''
  empty = RDoc::Encoding.change_encoding empty, @text.encoding

  @text = @text.gsub(%r%^\s*([#*]?)--.*?^\s*(\1)\+\+\n?%m, empty)
  @text = @text.sub(%r%^\s*[#*]?--.*%m, '')
end

text=(text) click to toggle source

Replaces this comment's text with text and resets the parsed document.

An error is raised if the comment contains a document but no text.

# File lib/rdoc/comment.rb, line 224
def text= text
  raise RDoc::Error, 'replacing document-only comment is not allowed' if
    @text.nil? and @document

  @document = nil
  @text = text.nil? ? nil : text.dup
end

tomdoc?() click to toggle source

Returns true if this comment is in TomDoc format.

# File lib/rdoc/comment.rb, line 235
def tomdoc?
  @format == 'tomdoc'
end