/usr/lib/ruby/vendor_ruby/kramdown-rfc2629.rb is in ruby-kramdown-rfc2629 1.0.30-1.
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#
#--
# Copyright (C) 2009-2010 Thomas Leitner <t_leitner@gmx.at>
# Copyright (C) 2010-2014 Carsten Bormann <cabo@tzi.org>
#
# This file was derived from a part of the kramdown gem which is licensed under the MIT license.
# This derived work is also licensed under the MIT license, see LICENSE.
#++
#
raise "sorry, 1.8 was last decade" unless RUBY_VERSION >= '1.9'
require 'kramdown'
my_span_elements = %w{list figure xref eref iref cref spanx vspace}
Kramdown::Parser::Html::Constants::HTML_SPAN_ELEMENTS.concat my_span_elements
require 'rexml/parsers/baseparser'
require 'open3' # for math
class Object
def deep_clone
Marshal.load(Marshal.dump(self))
end
end
module Kramdown
module Parser
class RFC2629Kramdown < Kramdown
def initialize(*doc)
super
@span_parsers.unshift(:xref)
@span_parsers.unshift(:iref)
end
XREF_START = /\{\{(.*?)\}\}/u
# Introduce new {{target}} syntax for empty xrefs, which would
# otherwise be an ugly ![!](target) or ![ ](target)
# (I'd rather use [[target]], but that somehow clashes with links.)
def parse_xref
@src.pos += @src.matched_size
href = @src[1]
href = href.gsub(/\A[0-9]/) { "_#{$&}" } # can't start an IDREF with a number
el = Element.new(:xref, nil, {'target' => href})
@tree.children << el
end
define_parser(:xref, XREF_START, '{{')
IREF_START = /\(\(\((.*?)\)\)\)/u
# Introduce new (((target))) syntax for irefs
def parse_iref
@src.pos += @src.matched_size
href = @src[1]
el = Element.new(:iref, nil, {'target' => href}) # XXX
@tree.children << el
end
define_parser(:iref, IREF_START, '\(\(\(')
end
end
class Element
def rfc2629_fix
if a = attr
if anchor = a.delete('id')
a['anchor'] = anchor
end
if anchor = a.delete('href')
a['target'] = anchor
end
end
end
end
module Converter
# Converts a Kramdown::Document to HTML.
class Rfc2629 < Base
# we use these to do XML stuff, too
include ::Kramdown::Utils::Html
def el_html_attributes(el)
html_attributes(el.attr)
end
def el_html_attributes_with(el, defattr)
html_attributes(defattr.merge(el.attr))
end
# :stopdoc:
# Defines the amount of indentation used when nesting XML tags.
INDENTATION = 2
# Initialize the XML converter with the given Kramdown document +doc+.
def initialize(*doc)
super
@sec_level = 1
@in_dt = 0
@footnote_names_in_use = {}
end
def convert(el, indent = -INDENTATION, opts = {})
if el.children[-1].type == :raw
raw = convert1(el.children.pop, indent, opts)
end
"#{convert1(el, indent, opts)}#{end_sections(1, indent)}#{raw}"
end
def convert1(el, indent, opts = {})
el.rfc2629_fix
send("convert_#{el.type}", el, indent, opts)
end
def inner_a(el, indent, opts)
indent += INDENTATION
el.children.map do |inner_el|
inner_el.rfc2629_fix
send("convert_#{inner_el.type}", inner_el, indent, opts)
end
end
def inner(el, indent, opts)
inner_a(el, indent, opts).join('')
end
def convert_blank(el, indent, opts)
"\n"
end
def convert_text(el, indent, opts)
escape_html(el.value, :text)
end
def convert_p(el, indent, opts)
if (el.children.size == 1 && el.children[0].type == :img) || opts[:unpacked]
inner(el, indent, opts) # Part of the bad reference hack
else
"#{' '*indent}<t#{el_html_attributes(el)}>#{inner(el, indent, opts)}</t>\n"
end
end
def saner_generate_id(value)
generate_id(value).gsub(/-+/, '-')
end
def convert_codeblock(el, indent, opts)
# el.attr['anchor'] ||= saner_generate_id(el.value) -- no longer in 1.0.6
result = el.value
blockclass = el.attr.delete('class')
if blockclass == 'language-tbreak'
result = result.lines.map {|line| [line.chomp, 0]}
spaceind = 0
result.each_with_index {|pair, index|
if pair[0] == ''
result[spaceind][1] += 1
pair[0] = nil unless index == spaceind
else
spaceind = index
end
}
# $stderr.puts(result.inspect)
result = result.map {|line, space|
"<![CDATA[#{line.gsub(/^\s+/) {|s| "\u00A0" * s.size}}]]><vspace blankLines=\"#{space}\"/>" if line
}.compact.join("\n")
"#{' '*indent}<t>#{result}</t>\n"
else
artwork_attr = {}
if blockclass
classes = blockclass.split(' ')
classes.each do |cl|
if md = cl.match(/\Alanguage-(.*)/)
artwork_attr["type"] = md[1] # XXX overwrite
else
$stderr.puts "*** Unimplemented block class: #{cl}"
end
end
end
# compensate for XML2RFC idiosyncracy by insisting on a blank line
unless el.attr.delete('tight')
result[0,0] = "\n" unless result[0,1] == "\n"
end
el.attr.each do |k, v|
if md = k.match(/\Aartwork-(.*)/)
el.attr.delete(k)
artwork_attr[md[1]] = v
end
end
"#{' '*indent}<figure#{el_html_attributes(el)}><artwork#{html_attributes(artwork_attr)}><![CDATA[#{result}#{result =~ /\n\Z/ ? '' : "\n"}]]></artwork></figure>\n"
end
end
def convert_blockquote(el, indent, opts)
text = inner(el, indent, opts)
text = "<t></t>" unless text =~ /</ # empty block quote
"#{' '*indent}<t><list style='empty'#{el_html_attributes(el)}>\n#{text}#{' '*indent}</list></t>\n"
end
def end_sections(to_level, indent)
if indent < 0
indent = 0
end
if @sec_level >= to_level
delta = (@sec_level - to_level)
@sec_level = to_level
"#{' '*indent}</section>\n" * delta
else
$stderr.puts "Incorrect section nesting: Need to start with 1"
end
end
def clean_pcdata(parts) # hack, will become unnecessary with XML2RFCv3
clean = ''
irefs = ''
# warn "clean_parts: #{parts.inspect}"
parts.each do |p|
md = p.match(%r{([^<]*)(.*)})
clean << md[1]
irefs << md[2] # breaks for spanx... don't emphasize in headings!
end
[clean, irefs]
end
def convert_header(el, indent, opts)
# todo: handle appendix tags
el = el.deep_clone
options = @doc ? @doc.options : @options # XXX: 0.11 vs. 0.12
if options[:auto_ids] && !el.attr['anchor']
el.attr['anchor'] = saner_generate_id(el.options[:raw_text])
end
clean, irefs = clean_pcdata(inner_a(el, indent, opts))
el.attr['title'] = clean
"#{end_sections(el.options[:level], indent)}#{' '*indent}<section#{@sec_level += 1; el_html_attributes(el)}>#{irefs}\n"
end
def convert_hr(el, indent, opts) # misuse for page break
"#{' '*indent}<t><vspace blankLines='999' /></t>\n"
end
STYLES = {ul: 'symbols', ol: 'numbers', dl: 'hanging'}
def convert_ul(el, indent, opts)
opts = opts.merge(vspace: el.attr.delete('vspace'))
attrstring = el_html_attributes_with(el, {"style" => STYLES[el.type]})
if opts[:unpacked]
"#{' '*indent}<list#{attrstring}>\n#{inner(el, indent, opts)}#{' '*indent}</list>\n"
else
"#{' '*indent}<t><list#{attrstring}>\n#{inner(el, indent, opts)}#{' '*indent}</list></t>\n"
end
end
alias :convert_ol :convert_ul
alias :convert_dl :convert_ul
def convert_li(el, indent, opts)
res_a = inner_a(el, indent, opts)
if el.children.empty? || el.children.first.options[:category] == :span
res = res_a.join('')
else # merge multiple <t> elements
res = res_a.select { |x|
x.strip != ''
}.map { |x|
x.sub(/\A\s*<t>(.*)<\/t>\s*\Z/m) { $1}
}.join("#{' '*indent}<vspace blankLines='1'/>\n").gsub(%r{(</list>)\s*<vspace blankLines='1'/>}) { $1 }.gsub(%r{<vspace blankLines='1'/>\s*(<list)}) { $1 }
end
"#{' '*indent}<t#{el_html_attributes(el)}>#{res}#{(res =~ /\n\Z/ ? ' '*indent : '')}</t>\n"
end
def convert_dd(el, indent, opts)
output = ' '*indent
if @in_dt == 1
@in_dt = 0
else
output << "<t#{el_html_attributes(el)}>"
end
res = inner(el, indent+INDENTATION, opts.merge(unpacked: true))
# if el.children.empty? || el.children.first.options[:category] != :block
output << res << (res =~ /\n\Z/ ? ' '*indent : '')
# else FIXME: The latter case is needed for more complex cases
# output << "\n" << res << ' '*indent
# end
output << "</t>\n"
end
def convert_dt(el, indent, opts) # SERIOUSLY BAD HACK:
close = "#{' '*indent}</t>\n" * @in_dt
@in_dt = 1
vspace = opts[:vspace]
vspaceel = "<vspace blankLines='#{vspace}'/>" if vspace
ht = escape_html(inner(el, indent, opts), :attribute) # XXX this may leave gunk
"#{close}#{' '*indent}<t#{el_html_attributes(el)} hangText='#{ht}'>#{vspaceel}\n"
end
HTML_TAGS_WITH_BODY=['div', 'script']
def convert_html_element(el, indent, opts)
res = inner(el, indent, opts)
if el.options[:category] == :span
"<#{el.value}#{el_html_attributes(el)}" << (!res.empty? ? ">#{res}</#{el.value}>" : " />")
else
output = ''
output << ' '*indent if !el.options[:parent_is_raw]
output << "<#{el.value}#{el_html_attributes(el)}"
if !res.empty? && el.options[:parse_type] != :block
output << ">#{res}</#{el.value}>"
elsif !res.empty?
output << ">\n#{res}" << ' '*indent << "</#{el.value}>"
elsif HTML_TAGS_WITH_BODY.include?(el.value)
output << "></#{el.value}>"
else
output << " />"
end
output << "\n" if el.options[:outer_element] || !el.options[:parent_is_raw]
output
end
end
def convert_xml_comment(el, indent, opts)
if el.options[:category] == :block && !el.options[:parent_is_raw]
' '*indent + el.value + "\n"
else
el.value
end
end
alias :convert_xml_pi :convert_xml_comment
alias :convert_html_doctype :convert_xml_comment
ALIGNMENTS = { default: :left, left: :left, right: :right, center: :center}
COLS_ALIGN = { "l" => :left, "c" => :center, "r" => :right}
def convert_table(el, indent, opts) # This only works for tables with headers
alignment = el.options[:alignment].map { |al| ALIGNMENTS[al]}
cols = (el.attr.delete("cols") || "").split(' ')
"#{' '*indent}<texttable#{el_html_attributes(el)}>\n#{inner(el, indent, opts.merge(table_alignment: alignment, table_cols: cols))}#{' '*indent}</texttable>\n"
end
def convert_thead(el, indent, opts)
inner(el, indent, opts)
end
alias :convert_tbody :convert_thead
alias :convert_tfoot :convert_thead
alias :convert_tr :convert_thead
def convert_td(el, indent, opts)
if alignment = opts[:table_alignment]
alignment = alignment.shift
if cols = opts[:table_cols].shift
md = cols.match(/(\d*(|em|[%*]))([lrc])/)
if md[1].to_i != 0
widthval = md[1]
widthval << "em" if md[2].empty?
widthopt = "width='#{widthval}' "
end
alignment = COLS_ALIGN[md[3]] || :left
end
end
if alignment
res, irefs = clean_pcdata(inner_a(el, indent, opts))
warn "*** lost markup #{irefs} in table heading" unless irefs.empty?
"#{' '*indent}<ttcol #{widthopt}align='#{alignment}'#{el_html_attributes(el)}>#{res.empty? ? " " : res}</ttcol>\n" # XXX need clean_pcdata
else
res = inner(el, indent, opts)
"#{' '*indent}<c#{el_html_attributes(el)}>#{res.empty? ? " " : res}</c>\n"
end
end
alias :convert_th :convert_td
def convert_comment(el, indent, opts)
## Don't actually output all those comments into the XML:
# if el.options[:category] == :block
# "#{' '*indent}<!-- #{el.value} -->\n"
# else
# "<!-- #{el.value} -->"
# end
end
def convert_br(el, indent, opts)
"<vspace />"
end
def convert_a(el, indent, opts)
res = inner(el, indent, opts)
target = el.attr['target']
if target[0] == "#" # handle [](#foo) as xref as in RFC 7328
el.attr['target'] = target = target[1..-1]
if target.downcase == res.downcase
res = '' # get rid of raw anchors leaking through
end
"<xref#{el_html_attributes(el)}>#{res}</xref>"
else
"<eref#{el_html_attributes(el)}>#{res}</eref>"
end
end
def convert_xref(el, indent, opts)
target = el.attr['target']
if target[0] == "&"
"#{target};"
elsif target =~ %r{\A\w+:(?://|.*@)}
"<eref#{el_html_attributes(el)}/>"
else
"<xref#{el_html_attributes(el)}/>"
end
end
REFCACHEDIR = ".refcache"
def get_and_cache_resource(url, tn = Time.now, tvalid = 7200)
Dir.mkdir(REFCACHEDIR) unless Dir.exists?(REFCACHEDIR)
fn = "#{REFCACHEDIR}/#{File.basename(url)}"
f = File.stat(fn) rescue nil
if !f || tn - f.ctime >= tvalid
if f
message = "renewing (stale by #{"%.1f" % ((tn-f.ctime)/86400)} days)"
fetch_timeout = 10 # seconds, give up quickly if just renewing
else
message = "fetching"
fetch_timeout = 60 # seconds; long timeout needed for Travis
end
$stderr.puts "#{fn}: #{message}"
if ENV["HAVE_WGET"]
`cd #{REFCACHEDIR}; wget -t 3 -T #{fetch_timeout} -Nnv "#{url}"` # ignore errors if offline (hack)
begin
File.utime nil, nil, fn
rescue Errno::ENOENT
warn "Can't fetch #{url} -- is wget in path?"
end
else
require 'open-uri'
require 'timeout'
begin
Timeout::timeout(fetch_timeout) do
open(url) do |f|
s = f.read
if f.status[0] != "200"
warn "*** Status code #{status} while fetching #{url}"
else
File.write(fn, s)
end
end
end
rescue OpenURI::HTTPError, SocketError, Timeout::Error => e
warn "*** #{e} while fetching #{url}"
end
end
end
File.read(fn) # this blows up if no cache available after fetch attempt
end
XML_RESOURCE_ORG_MAP = {
"RFC" => "bibxml", "I-D" => "bibxml3", "W3C" => "bibxml4", "3GPP" => "bibxml5",
"ANSI" => "bibxml2",
"CCITT" => "bibxml2",
"FIPS" => "bibxml2",
"IANA" => "bibxml2",
"IEEE" => "bibxml2",
"ISO" => "bibxml2",
"ITU" => "bibxml2",
"NIST" => "bibxml2",
"OASIS" => "bibxml2",
"PKCS" => "bibxml2",
}
# XML_RESOURCE_ORG_HOST = ENV["XML_RESOURCE_ORG_HOST"] || "xml.resource.org"
XML_RESOURCE_ORG_HOST = ENV["XML_RESOURCE_ORG_HOST"] || "xml2rfc.ietf.org"
XML_RESOURCE_ORG_PREFIX = ENV["XML_RESOURCE_ORG_PREFIX"] ||
"http://#{XML_RESOURCE_ORG_HOST}/public/rfc"
def convert_img(el, indent, opts) # misuse the tag!
if a = el.attr
alt = a.delete('alt').strip
alt = '' if alt == '!' # work around re-wrap uglyness
if anchor = a.delete('src')
a['target'] = anchor
end
end
if alt == ":include:" # Really bad misuse of tag...
to_insert = ""
anchor.scan(/(W3C|3GPP|[A-Z-]+)[.]?([A-Za-z0-9.-]+)/) do |t, n|
fn = "reference.#{t}.#{n}.xml"
sub = XML_RESOURCE_ORG_MAP[t]
puts "Huh: ${fn}" unless sub
url = "#{XML_RESOURCE_ORG_PREFIX}/#{sub}/#{fn}"
to_insert = get_and_cache_resource(url)
to_insert.scrub! rescue nil # only do this for Ruby >= 2.1
end
to_insert.gsub(/<\?xml version=["']1.0["'] encoding=["']UTF-8["']\?>/, '').
gsub(/(anchor=["'])([0-9])/) { "#{$1}_#{$2}"} # can't start an ID with a number
else
"<xref#{el_html_attributes(el)}>#{alt}</xref>"
end
end
def convert_codespan(el, indent, opts)
attrstring = el_html_attributes_with(el, {"style" => 'verb'})
"<spanx#{attrstring}>#{escape_html(el.value)}</spanx>"
end
def convert_footnote(el, indent, opts) # XXX: footnotes into crefs???
# this would be more like xml2rfc v3:
# "\n#{' '*indent}<cref>\n#{inner(el.value, indent, opts).rstrip}\n#{' '*indent}</cref>"
content = inner(el.value, indent, opts).strip
content = escape_html(content.sub(/\A<t>(.*)<\/t>\z/m) {$1}, :text) # text only...
name = el.options[:name].sub(/\A[0-9]/) {"_" << $&}
while @footnote_names_in_use[name] do
if name =~ /:\d+\z/
name.succ!
else
name << ":1"
end
end
@footnote_names_in_use[name] = true
attrstring = el_html_attributes_with(el, {"anchor" => name})
"\n#{' '*indent}<cref#{attrstring}>#{content}</cref>"
end
def convert_raw(el, indent, opts)
end_sections(1, indent) +
el.value + (el.options[:category] == :block ? "\n" : '')
end
EMPH = { em: "emph", strong: "strong"}
def convert_em(el, indent, opts)
attrstring = el_html_attributes_with(el, {"style" => EMPH[el.type]})
span, irefs = clean_pcdata(inner_a(el, indent, opts))
"<spanx#{attrstring}>#{span}</spanx>#{irefs}"
end
alias :convert_strong :convert_em
def convert_entity(el, indent, opts)
entity_to_str(el.value)
end
TYPOGRAPHIC_SYMS = {
:mdash => [::Kramdown::Utils::Entities.entity('mdash')],
:ndash => [::Kramdown::Utils::Entities.entity('ndash')],
:hellip => [::Kramdown::Utils::Entities.entity('hellip')],
:laquo_space => [::Kramdown::Utils::Entities.entity('laquo'), ::Kramdown::Utils::Entities.entity('nbsp')],
:raquo_space => [::Kramdown::Utils::Entities.entity('nbsp'), ::Kramdown::Utils::Entities.entity('raquo')],
:laquo => [::Kramdown::Utils::Entities.entity('laquo')],
:raquo => [::Kramdown::Utils::Entities.entity('raquo')]
}
def convert_typographic_sym(el, indent, opts)
TYPOGRAPHIC_SYMS[el.value].map {|e| entity_to_str(e)}.join('')
end
def convert_smart_quote(el, indent, opts)
entity_to_str(::Kramdown::Utils::Entities.entity(el.value.to_s))
end
def convert_math(el, indent, opts) # XXX: This is wrong
el = el.deep_clone
if el.options[:category] == :block
el.attr['artwork-type'] ||= ''
el.attr['artwork-type'] += (el.attr['artwork-type'].empty? ? '' : ' ') + 'math'
artwork_attr = {}
el.attr.each do |k, v|
if md = k.match(/\Aartwork-(.*)/)
el.attr.delete(k)
artwork_attr[md[1]] = v
end
end
result, _s = Open3.capture2("tex2mail -noindent -ragged -by_par -linelength=69", stdin_data: el.value);
# warn "*** tex2mail not in path?" unless s.success? -- doesn't have useful status
"#{' '*indent}<figure#{el_html_attributes(el)}><artwork#{html_attributes(artwork_attr)}><![CDATA[#{result}#{result =~ /\n\Z/ ? '' : "\n"}]]></artwork></figure>\n"
else
warn "*** no support for inline math in XML2RFCv2"
type = 'spanx'
attrstring = el_html_attributes_with(el, {"style" => 'verb'})
"<#{type}#{attrstring}>#{escape_html(el.value, :text)}</#{type}>"
end
end
ITEM_RE = '\s*(?:"([^"]*)"|([^,]*?))\s*'
IREF_RE = %r{\A(!\s*)?#{ITEM_RE}(?:,#{ITEM_RE})?\z}
def iref_attr(s)
md = s.match(IREF_RE)
attr = {
item: md[2] || md[3],
subitem: md[4] || md[5],
primary: md[1] && 'true',
}
"<iref#{html_attributes(attr)}/>"
end
def convert_iref(el, indent, opts)
iref_attr(el.attr['target'])
end
def convert_abbreviation(el, indent, opts) # XXX: This is wrong
title = @root.options[:abbrev_defs][el.value]
title = nil if title.empty?
value = el.value
if item = title
m = title.scan(Parser::RFC2629Kramdown::IREF_START)
if m.empty?
subitem = value
else
iref = m.map{|a,| iref_attr(a)}.join('')
end
else
item = value
end
iref ||= "<iref#{html_attributes(item: item, subitem: subitem)}/>"
"#{el.value}#{iref}"
end
def convert_root(el, indent, opts)
result = inner(el, indent, opts)
end
end
end
end
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