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Diffstat (limited to 'lib/rdoc/comment.rb')
| -rw-r--r-- | lib/rdoc/comment.rb | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/lib/rdoc/comment.rb b/lib/rdoc/comment.rb new file mode 100644 index 0000000000..25e7c966c8 --- /dev/null +++ b/lib/rdoc/comment.rb @@ -0,0 +1,232 @@ +## +# 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 RDoc::Markup@Other+directives for instructions on adding an alternate +# format. + +class RDoc::Comment + + include RDoc::Text + + ## + # The format of this comment. Defaults to RDoc::Markup + + attr_reader :format + + ## + # The RDoc::TopLevel this comment was found in + + attr_accessor :location + + ## + # For duck-typing when merging classes at load time + + alias file location # :nodoc: + + ## + # The text for this comment + + attr_reader :text + + ## + # Overrides the content returned by #parse. Use when there is no #text + # source for this comment + + attr_writer :document + + ## + # Creates a new comment with +text+ that is found in the RDoc::TopLevel + # +location+. + + def initialize text = nil, location = nil + @location = location + @text = text + + @document = nil + @format = 'rdoc' + @normalized = false + end + + ## + #-- + # TODO deep copy @document + + def initialize_copy copy # :nodoc: + @text = copy.text.dup + end + + def == other # :nodoc: + self.class === other and + other.text == @text and other.location == @location + end + + ## + # 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 + + 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 + #elsif @text.sub!(/\A\/\*\s*call-seq:(.*?)\*\/\Z/, '') then + # method.call_seq = $1.strip + #end + + method + end + + ## + # A comment is empty if its text String is empty. + + def empty? + @text.empty? + end + + ## + # HACK dubious + + def force_encoding encoding + @text.force_encoding encoding + end + + ## + # Sets the format of this comment and resets any parsed document + + def format= format + @format = format + @document = nil + end + + def inspect # :nodoc: + location = @location ? @location.absolute_name : '(unknown)' + + "#<%s:%x %s %p>" % [self.class, object_id, location, @text] + end + + ## + # Normalizes the text. See RDoc::Text#normalize_comment for details + + def normalize + return self unless @text + return self if @normalized # TODO eliminate duplicate normalization + + @text = normalize_comment @text + + @normalized = true + + self + end + + ## + # Was this text normalized? + + def normalized? # :nodoc: + @normalized + end + + ## + # Parses the comment into an RDoc::Markup::Document. The parsed document is + # cached until the text is changed. + + def parse + return @document if @document + + @document = super @text, @format + @document.file = @location + @document + end + + ## + # Removes private sections from this comment. Private sections are flush to + # the comment marker and start with <tt>--</tt> and end with <tt>++</tt>. + # For C-style comments, a private marker may not start at the opening of the + # comment. + # + # /* + # *-- + # * private + # *++ + # * public + # */ + + 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 + + ## + # 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. + + def text= text + raise RDoc::Error, 'replacing document-only comment is not allowed' if + @text.nil? and @document + + @document = nil + @text = text + end + + ## + # Returns true if this comment is in TomDoc format. + + def tomdoc? + @format == 'tomdoc' + end + +end + |