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RDoc::Markup::Formatter

Base class for RDoc markup formatters

Formatters are a visitor that converts an RDoc::Markup tree (from a comment) into some kind of output. RDoc ships with formatters for converting back to rdoc, ANSI text, HTML, a Table of Contents and other formats.

If you'd like to write your own Formatter use RDoc::Markup::FormatterTestCase. If you're writing a text-output formatter use RDoc::Markup::TextFormatterTestCase which provides extra test cases.

Constants

InlineTag

Tag for inline markup containing a bit for the bitmask and the on and off triggers.

Public Class Methods

gen_relative_url(path, target) click to toggle source

Converts a target url to one that is relative to a given path

 
               # File rdoc/markup/formatter.rb, line 23
def self.gen_relative_url path, target
  from        = File.dirname path
  to, to_file = File.split target

  from = from.split "/"
  to   = to.split "/"

  from.delete '.'
  to.delete '.'

  while from.size > 0 and to.size > 0 and from[0] == to[0] do
    from.shift
    to.shift
  end

  from.fill ".."
  from.concat to
  from << to_file
  File.join(*from)
end
            
new(options, markup = nil) click to toggle source

Creates a new Formatter

 
               # File rdoc/markup/formatter.rb, line 47
def initialize options, markup = nil
  @options = options

  @markup = markup || RDoc::Markup.new
  @am     = @markup.attribute_manager
  @am.add_special(/<br>/, :HARD_BREAK)

  @attributes = @am.attributes

  @attr_tags = []

  @in_tt = 0
  @tt_bit = @attributes.bitmap_for :TT

  @hard_break = ''
  @from_path = '.'
end
            

Public Instance Methods

accept_document(document) click to toggle source

Adds document to the output

 
               # File rdoc/markup/formatter.rb, line 68
def accept_document document
  document.parts.each do |item|
    case item
    when RDoc::Markup::Document then # HACK
      accept_document item
    else
      item.accept self
    end
  end
end
            
add_tag(name, start, stop) click to toggle source

Add a new set of tags for an attribute. We allow separate start and end tags for flexibility

 
               # File rdoc/markup/formatter.rb, line 103
def add_tag(name, start, stop)
  attr = @attributes.bitmap_for name
  @attr_tags << InlineTag.new(attr, start, stop)
end
            
annotate(tag) click to toggle source

Allows tag to be decorated with additional information.

 
               # File rdoc/markup/formatter.rb, line 111
def annotate(tag)
  tag
end
            
convert(content) click to toggle source

Marks up content

 
               # File rdoc/markup/formatter.rb, line 118
def convert content
  @markup.convert content, self
end
            
convert_flow(flow) click to toggle source

Converts flow items flow

 
               # File rdoc/markup/formatter.rb, line 125
def convert_flow(flow)
  res = []

  flow.each do |item|
    case item
    when String then
      res << convert_string(item)
    when RDoc::Markup::AttrChanger then
      off_tags res, item
      on_tags res, item
    when RDoc::Markup::Special then
      res << convert_special(item)
    else
      raise "Unknown flow element: #{item.inspect}"
    end
  end

  res.join
end
            
convert_special(special) click to toggle source

Converts added specials. See RDoc::Markup#add_special

 
               # File rdoc/markup/formatter.rb, line 148
def convert_special special
  return special.text if in_tt?

  handled = false

  @attributes.each_name_of special.type do |name|
    method_name = "handle_special_#{name}"

    if respond_to? method_name then
      special.text = send method_name, special
      handled = true
    end
  end

  unless handled then
    special_name = @attributes.as_string special.type

    raise RDoc::Error, "Unhandled special #{special_name}: #{special}"
  end

  special.text
end
            
convert_string(string) click to toggle source

Converts a string to be fancier if desired

 
               # File rdoc/markup/formatter.rb, line 174
def convert_string string
  string
end
            
ignore(*node) click to toggle source

Use ignore in your subclass to ignore the content of a node.

##
# We don't support raw nodes in ToNoRaw

alias accept_raw ignore
 
               # File rdoc/markup/formatter.rb, line 186
def ignore *node
end
            
in_tt?() click to toggle source

Are we currently inside tt tags?

 
               # File rdoc/markup/formatter.rb, line 192
def in_tt?
  @in_tt > 0
end
            
off_tags(res, item) click to toggle source

Turns off tags for item on res

 
               # File rdoc/markup/formatter.rb, line 214
def off_tags res, item
  attr_mask = item.turn_off
  return if attr_mask.zero?

  @attr_tags.reverse_each do |tag|
    if attr_mask & tag.bit != 0 then
      @in_tt -= 1 if tt? tag
      res << annotate(tag.off)
    end
  end
end
            
on_tags(res, item) click to toggle source

Turns on tags for item on res

 
               # File rdoc/markup/formatter.rb, line 199
def on_tags res, item
  attr_mask = item.turn_on
  return if attr_mask.zero?

  @attr_tags.each do |tag|
    if attr_mask & tag.bit != 0 then
      res << annotate(tag.on)
      @in_tt += 1 if tt? tag
    end
  end
end
            
parse_url(url) click to toggle source

Extracts and a scheme, url and an anchor id from url and returns them.

 
               # File rdoc/markup/formatter.rb, line 229
def parse_url url
  case url
  when /^rdoc-label:([^:]*)(?::(.*))?/ then
    scheme = 'link'
    path   = "##{$1}"
    id     = " id=\"#{$2}\"" if $2
  when /([A-Za-z]+):(.*)/ then
    scheme = $1.downcase
    path   = $2
  when /^#/ then
  else
    scheme = 'http'
    path   = url
    url    = "http://#{url}"
  end

  if scheme == 'link' then
    url = if path[0, 1] == '#' then # is this meaningful?
            path
          else
            self.class.gen_relative_url @from_path, path
          end
  end

  [scheme, url, id]
end
            
tt?(tag) click to toggle source

Is tag a tt tag?

 
               # File rdoc/markup/formatter.rb, line 259
def tt? tag
  tag.bit == @tt_bit
end