Class: RDoc::Markup::Formatter

Inherits:
Object
  • Object
show all
Defined in:
lib/rdoc/markup/formatter.rb

Overview

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.

Defined Under Namespace

Classes: InlineTag

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options, markup = nil) ⇒ Formatter

Creates a new Formatter



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# File 'lib/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

Class Method Details

.gen_relative_url(path, target) ⇒ Object

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



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# File 'lib/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

Instance Method Details

#accept_document(document) ⇒ Object

Adds document to the output



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# File 'lib/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

Adds a special for links of the form rdoc-…:



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# File 'lib/rdoc/markup/formatter.rb', line 82

def add_special_RDOCLINK
  @markup.add_special(/rdoc-[a-z]+:[^\s\]]+/, :RDOCLINK)
end

Adds a special for links of the form ”>word>



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# File 'lib/rdoc/markup/formatter.rb', line 89

def add_special_TIDYLINK
  @markup.add_special(/(?:
                        \{.*?\} |    # multi-word label
                        \b[^\s{}]+? # single-word label
                       )

                       \[\S+?\]     # link target
                      /x, :TIDYLINK)
end

#add_tag(name, start, stop) ⇒ Object

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



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# File 'lib/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) ⇒ Object

Allows tag to be decorated with additional information.



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# File 'lib/rdoc/markup/formatter.rb', line 111

def annotate(tag)
  tag
end

#convert(content) ⇒ Object

Marks up content



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# File 'lib/rdoc/markup/formatter.rb', line 118

def convert content
  @markup.convert content, self
end

#convert_flow(flow) ⇒ Object

Converts flow items flow



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# File 'lib/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) ⇒ Object

Converts added specials. See RDoc::Markup#add_special



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# File 'lib/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) ⇒ Object

Converts a string to be fancier if desired



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# File 'lib/rdoc/markup/formatter.rb', line 174

def convert_string string
  string
end

#ignore(*node) ⇒ Object

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

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

alias accept_raw ignore


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# File 'lib/rdoc/markup/formatter.rb', line 186

def ignore *node
end

#in_tt?Boolean

Are we currently inside tt tags?

Returns:

  • (Boolean)


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# File 'lib/rdoc/markup/formatter.rb', line 192

def in_tt?
  @in_tt > 0
end

#off_tags(res, item) ⇒ Object

Turns off tags for item on res



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# File 'lib/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) ⇒ Object

Turns on tags for item on res



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# File 'lib/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) ⇒ Object

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



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# File 'lib/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    = 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) ⇒ Boolean

Is tag a tt tag?

Returns:

  • (Boolean)


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# File 'lib/rdoc/markup/formatter.rb', line 259

def tt? tag
  tag.bit == @tt_bit
end