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Class: RDoc::Comment

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Instance Chain:
self, Text
Inherits: Object
Defined in: lib/rdoc/comment.rb

Overview

A comment holds the text comment for a CodeObject and provides a unified way of cleaning it up and parsing it into an 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 RDoc::Markup@Other+directives for instructions on adding an alternate format.

Constant Summary

Text - Included

MARKUP_FORMAT, TO_HTML_CHARACTERS

Class Method Summary

Instance Attribute Summary

Instance Method Summary

Text - Included

#expand_tabs

Expands tab characters in #text to eight spaces.

#flush_left

Flush #text left based on the shortest line.

#markup

Convert a string in markup format into HTML.

#normalize_comment

Strips hashes, expands tabs then flushes #text to the left.

#parse

Normalizes #text then builds a Markup::Document from it.

#snippet

The first limit characters of #text as HTML.

#strip_hashes

Strips leading # characters from #text

#strip_newlines

Strips leading and trailing n characters from #text

#strip_stars

Strips /* */ style comments.

#to_html

Converts ampersand, dashes, ellipsis, quotes, copyright and registered trademark symbols in #text to properly encoded characters.

#wrap

Wraps txt to line_len

Constructor Details

.new(text = nil, location = nil) ⇒ Comment

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

[ GitHub ]

  
# File 'lib/rdoc/comment.rb', line 46

def initialize text = nil, location = nil
  @location = location
  @text     = text

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

Instance Attribute Details

#document=(value) (writeonly)

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

[ GitHub ]

  
# File 'lib/rdoc/comment.rb', line 40

attr_writer   :document

#empty?Boolean (readonly)

A comment is empty if its text String is empty.

[ GitHub ]

  
# File 'lib/rdoc/comment.rb', line 129

def empty?
  @text.empty?
end

#format (rw)

The format of this comment. Defaults to Markup

[ GitHub ]

  
# File 'lib/rdoc/comment.rb', line 19

attr_reader :format

#format=(format) (rw)

Sets the format of this comment and resets any parsed document

[ GitHub ]

  
# File 'lib/rdoc/comment.rb', line 143

def format= format
  @format = format
  @document = nil
end

#location (rw) Also known as: #file

The TopLevel this comment was found in

[ GitHub ]

  
# File 'lib/rdoc/comment.rb', line 24

attr_accessor :location

#text (rw)

The text for this comment

[ GitHub ]

  
# File 'lib/rdoc/comment.rb', line 34

attr_reader :text

#text=(text) (rw)

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.

Raises:

[ GitHub ]

  
# File 'lib/rdoc/comment.rb', line 214

def text= text
  raise RDoc::Error, 'replacing document-only comment is not allowed' if
    @text.nil? and @document

  @document = nil
  @text = text
end

#tomdoc?Boolean (readonly)

Returns true if this comment is in TomDoc format.

[ GitHub ]

  
# File 'lib/rdoc/comment.rb', line 225

def tomdoc?
  @format == 'tomdoc'
end

Instance Method Details

#extract_call_seq(method)

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
[ GitHub ]

  
# 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

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

  method
end

#force_encoding(encoding)

HACK dubious

[ GitHub ]

  
# File 'lib/rdoc/comment.rb', line 136

def force_encoding encoding
  @text.force_encoding encoding
end

#normalize

Normalizes the text. See Text#normalize_comment for details

[ GitHub ]

  
# File 'lib/rdoc/comment.rb', line 157

def normalize
  return self unless @text
  return self if @normalized # TODO eliminate duplicate normalization

  @text = normalize_comment @text

  @normalized = true

  self
end

#parse

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

[ GitHub ]

  
# File 'lib/rdoc/comment.rb', line 179

def parse
  return @document if @document

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

#remove_private

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

/*
 *--
 * private
 *++
 * public
 */
[ GitHub ]

  
# File 'lib/rdoc/comment.rb', line 200

def remove_private
  # Workaround for gsub encoding for Ruby 1.9.2 and earlier
  empty = ''
  empty.force_encoding @text.encoding if Object.const_defined? :Encoding

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