Current File : //opt/alt/ruby23/lib64/ruby/2.3.0/rdoc/markup/formatter.rb
# frozen_string_literal: false
##
# 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.
class RDoc::Markup::Formatter
##
# Tag for inline markup containing a +bit+ for the bitmask and the +on+ and
# +off+ triggers.
InlineTag = Struct.new(:bit, :on, :off)
##
# Converts a target url to one that is relative to a given path
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
##
# Creates a new Formatter
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
##
# Adds +document+ to the output
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-...:
def add_special_RDOCLINK
@markup.add_special(/rdoc-[a-z]+:[^\s\]]+/, :RDOCLINK)
end
##
# Adds a special for links of the form {<text>}[<url>] and <word>[<url>]
def add_special_TIDYLINK
@markup.add_special(/(?:
\{.*?\} | # multi-word label
\b[^\s{}]+? # single-word label
)
\[\S+?\] # link target
/x, :TIDYLINK)
end
##
# Add a new set of tags for an attribute. We allow separate start and end
# tags for flexibility
def add_tag(name, start, stop)
attr = @attributes.bitmap_for name
@attr_tags << InlineTag.new(attr, start, stop)
end
##
# Allows +tag+ to be decorated with additional information.
def annotate(tag)
tag
end
##
# Marks up +content+
def convert content
@markup.convert content, self
end
##
# Converts flow items +flow+
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
##
# Converts added specials. See RDoc::Markup#add_special
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
##
# Converts a string to be fancier if desired
def convert_string string
string
end
##
# Use ignore in your subclass to ignore the content of a node.
#
# ##
# # We don't support raw nodes in ToNoRaw
#
# alias accept_raw ignore
def ignore *node
end
##
# Are we currently inside tt tags?
def in_tt?
@in_tt > 0
end
##
# Turns on tags for +item+ on +res+
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
##
# Turns off tags for +item+ on +res+
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
##
# Extracts and a scheme, url and an anchor id from +url+ and returns them.
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
##
# Is +tag+ a tt tag?
def tt? tag
tag.bit == @tt_bit
end
end
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