#!/usr/bin/env python
# -*- coding: utf-8 -*-
# :Author: David Goodger, Günter Milde
# Based on the html4css1 writer by David Goodger.
# :Maintainer: docutils-develop@lists.sourceforge.net
# :Revision: $Revision: 8118 $
# :Date: $Date: 2005-06-28$
# :Copyright: © 2016 David Goodger, Günter Milde
# :License: Released under the terms of the `2-Clause BSD license`_, in short:
#
# Copying and distribution of this file, with or without modification,
# are permitted in any medium without royalty provided the copyright
# notice and this notice are preserved.
# This file is offered as-is, without any warranty.
#
# .. _2-Clause BSD license: http://www.spdx.org/licenses/BSD-2-Clause
"""common definitions for Docutils HTML writers"""
import sys
import os.path
import re
import urllib.request, urllib.parse, urllib.error
try: # check for the Python Imaging Library
import PIL.Image
except ImportError:
try: # sometimes PIL modules are put in PYTHONPATH's root
import Image
class PIL(object): pass # dummy wrapper
PIL.Image = Image
except ImportError:
PIL = None
import docutils
from docutils import nodes, utils, writers, languages, io
from docutils.utils.error_reporting import SafeString
from docutils.transforms import writer_aux
from docutils.utils.math import (unichar2tex, pick_math_environment,
math2html, latex2mathml, tex2mathml_extern)
[docs]class Writer(writers.Writer):
supported = ('html', 'xhtml') # update in subclass
"""Formats this writer supports."""
# default_stylesheets = [] # set in subclass!
# default_stylesheet_dirs = ['.'] # set in subclass!
default_template = 'template.txt'
# default_template_path = ... # set in subclass!
# settings_spec = ... # set in subclass!
settings_defaults = {'output_encoding_error_handler': 'xmlcharrefreplace'}
# config_section = ... # set in subclass!
config_section_dependencies = ['writers', 'html writers']
visitor_attributes = (
'head_prefix', 'head', 'stylesheet', 'body_prefix',
'body_pre_docinfo', 'docinfo', 'body', 'body_suffix',
'title', 'subtitle', 'header', 'footer', 'meta', 'fragment',
'html_prolog', 'html_head', 'html_title', 'html_subtitle',
'html_body')
[docs] def translate(self):
self.visitor = visitor = self.translator_class(self.document)
self.document.walkabout(visitor)
for attr in self.visitor_attributes:
setattr(self, attr, getattr(visitor, attr))
self.output = self.apply_template()
[docs] def apply_template(self):
template_file = open(self.document.settings.template, 'rb')
template = str(template_file.read(), 'utf-8')
template_file.close()
subs = self.interpolation_dict()
return template % subs
[docs] def interpolation_dict(self):
subs = {}
settings = self.document.settings
for attr in self.visitor_attributes:
subs[attr] = ''.join(getattr(self, attr)).rstrip('\n')
subs['encoding'] = settings.output_encoding
subs['version'] = docutils.__version__
return subs
[docs] def assemble_parts(self):
writers.Writer.assemble_parts(self)
for part in self.visitor_attributes:
self.parts[part] = ''.join(getattr(self, part))
[docs]class HTMLTranslator(nodes.NodeVisitor):
"""
Generic Docutils to HTML translator.
See the `html4css1` and `html5_polyglot` writers for full featured
HTML writers.
.. IMPORTANT::
The `visit_*` and `depart_*` methods use a
heterogeneous stack, `self.context`.
When subclassing, make sure to be consistent in its use!
Examples for robust coding:
a) Override both `visit_*` and `depart_*` methods, don't call the
parent functions.
b) Extend both and unconditionally call the parent functions::
def visit_example(self, node):
if foo:
self.body.append('<div class="foo">')
html4css1.HTMLTranslator.visit_example(self, node)
def depart_example(self, node):
html4css1.HTMLTranslator.depart_example(self, node)
if foo:
self.body.append('</div>')
c) Extend both, calling the parent functions under the same
conditions::
def visit_example(self, node):
if foo:
self.body.append('<div class="foo">\n')
else: # call the parent method
_html_base.HTMLTranslator.visit_example(self, node)
def depart_example(self, node):
if foo:
self.body.append('</div>\n')
else: # call the parent method
_html_base.HTMLTranslator.depart_example(self, node)
d) Extend one method (call the parent), but don't otherwise use the
`self.context` stack::
def depart_example(self, node):
_html_base.HTMLTranslator.depart_example(self, node)
if foo:
# implementation-specific code
# that does not use `self.context`
self.body.append('</div>\n')
This way, changes in stack use will not bite you.
"""
xml_declaration = '<?xml version="1.0" encoding="%s" ?>\n'
doctype = '<!DOCTYPE html>\n'
doctype_mathml = doctype
head_prefix_template = ('<html xmlns="http://www.w3.org/1999/xhtml"'
' xml:lang="%(lang)s" lang="%(lang)s">\n<head>\n')
content_type = ('<meta charset="%s"/>\n')
generator = ('<meta name="generator" content="Docutils %s: '
'http://docutils.sourceforge.net/" />\n')
# Template for the MathJax script in the header:
mathjax_script = '<script type="text/javascript" src="%s"></script>\n'
mathjax_url = 'file:/usr/share/javascript/mathjax/MathJax.js'
"""
URL of the MathJax javascript library.
The MathJax library ought to be installed on the same
server as the rest of the deployed site files and specified
in the `math-output` setting appended to "mathjax".
See `Docutils Configuration`__.
__ http://docutils.sourceforge.net/docs/user/config.html#math-output
The fallback tries a local MathJax installation at
``/usr/share/javascript/mathjax/MathJax.js``.
"""
stylesheet_link = '<link rel="stylesheet" href="%s" type="text/css" />\n'
embedded_stylesheet = '<style type="text/css">\n\n%s\n</style>\n'
words_and_spaces = re.compile(r'\S+| +|\n')
# wrap point inside word:
in_word_wrap_point = re.compile(r'.+\W\W.+|[-?].+', re.U)
lang_attribute = 'lang' # name changes to 'xml:lang' in XHTML 1.1
special_characters = {ord('&'): '&',
ord('<'): '<',
ord('"'): '"',
ord('>'): '>',
ord('@'): '@', # may thwart address harvesters
}
"""Character references for characters with a special meaning in HTML."""
def __init__(self, document):
nodes.NodeVisitor.__init__(self, document)
self.settings = settings = document.settings
lcode = settings.language_code
self.language = languages.get_language(lcode, document.reporter)
self.meta = [self.generator % docutils.__version__]
self.head_prefix = []
self.html_prolog = []
if settings.xml_declaration:
self.head_prefix.append(self.xml_declaration
% settings.output_encoding)
# self.content_type = ""
# encoding not interpolated:
self.html_prolog.append(self.xml_declaration)
self.head = self.meta[:]
self.stylesheet = [self.stylesheet_call(path)
for path in utils.get_stylesheet_list(settings)]
self.body_prefix = ['</head>\n<body>\n']
# document title, subtitle display
self.body_pre_docinfo = []
# author, date, etc.
self.docinfo = []
self.body = []
self.fragment = []
self.body_suffix = ['</body>\n</html>\n']
self.section_level = 0
self.initial_header_level = int(settings.initial_header_level)
self.math_output = settings.math_output.split()
self.math_output_options = self.math_output[1:]
self.math_output = self.math_output[0].lower()
self.context = []
"""Heterogeneous stack.
Used by visit_* and depart_* functions in conjunction with the tree
traversal. Make sure that the pops correspond to the pushes."""
self.topic_classes = [] # TODO: replace with self_in_contents
self.colspecs = []
self.compact_p = True
self.compact_simple = False
self.compact_field_list = False
self.in_docinfo = False
self.in_sidebar = False
self.in_footnote_list = False
self.title = []
self.subtitle = []
self.header = []
self.footer = []
self.html_head = [self.content_type] # charset not interpolated
self.html_title = []
self.html_subtitle = []
self.html_body = []
self.in_document_title = 0 # len(self.body) or 0
self.in_mailto = False
self.author_in_authors = False # for html4css1
self.math_header = []
[docs] def astext(self):
return ''.join(self.head_prefix + self.head
+ self.stylesheet + self.body_prefix
+ self.body_pre_docinfo + self.docinfo
+ self.body + self.body_suffix)
[docs] def encode(self, text):
"""Encode special characters in `text` & return."""
# Use only named entities known in both XML and HTML
# other characters are automatically encoded "by number" if required.
# @@@ A codec to do these and all other HTML entities would be nice.
text = str(text)
return text.translate(self.special_characters)
[docs] def cloak_mailto(self, uri):
"""Try to hide a mailto: URL from harvesters."""
# Encode "@" using a URL octet reference (see RFC 1738).
# Further cloaking with HTML entities will be done in the
# `attval` function.
return uri.replace('@', '%40')
[docs] def cloak_email(self, addr):
"""Try to hide the link text of a email link from harversters."""
# Surround at-signs and periods with <span> tags. ("@" has
# already been encoded to "@" by the `encode` method.)
addr = addr.replace('@', '<span>@</span>')
addr = addr.replace('.', '<span>.</span>')
return addr
[docs] def attval(self, text,
whitespace=re.compile('[\n\r\t\v\f]')):
"""Cleanse, HTML encode, and return attribute value text."""
encoded = self.encode(whitespace.sub(' ', text))
if self.in_mailto and self.settings.cloak_email_addresses:
# Cloak at-signs ("%40") and periods with HTML entities.
encoded = encoded.replace('%40', '%40')
encoded = encoded.replace('.', '.')
return encoded
[docs] def stylesheet_call(self, path):
"""Return code to reference or embed stylesheet file `path`"""
if self.settings.embed_stylesheet:
try:
content = io.FileInput(source_path=path,
encoding='utf-8').read()
self.settings.record_dependencies.add(path)
except IOError as err:
msg = "Cannot embed stylesheet '%s': %s." % (
path, SafeString(err.strerror))
self.document.reporter.error(msg)
return '<--- %s --->\n' % msg
return self.embedded_stylesheet % content
# else link to style file:
if self.settings.stylesheet_path:
# adapt path relative to output (cf. config.html#stylesheet-path)
path = utils.relative_path(self.settings._destination, path)
return self.stylesheet_link % self.encode(path)
[docs] def starttag(self, node, tagname, suffix='\n', empty=False, **attributes):
"""
Construct and return a start tag given a node (id & class attributes
are extracted), tag name, and optional attributes.
"""
tagname = tagname.lower()
prefix = []
atts = {}
ids = []
for (name, value) in list(attributes.items()):
atts[name.lower()] = value
classes = []
languages = []
# unify class arguments and move language specification
for cls in node.get('classes', []) + atts.pop('class', '').split() :
if cls.startswith('language-'):
languages.append(cls[9:])
elif cls.strip() and cls not in classes:
classes.append(cls)
if languages:
# attribute name is 'lang' in XHTML 1.0 but 'xml:lang' in 1.1
atts[self.lang_attribute] = languages[0]
if classes:
atts['class'] = ' '.join(classes)
assert 'id' not in atts
ids.extend(node.get('ids', []))
if 'ids' in atts:
ids.extend(atts['ids'])
del atts['ids']
if ids:
atts['id'] = ids[0]
for id in ids[1:]:
# Add empty "span" elements for additional IDs. Note
# that we cannot use empty "a" elements because there
# may be targets inside of references, but nested "a"
# elements aren't allowed in XHTML (even if they do
# not all have a "href" attribute).
if empty or isinstance(node,
(nodes.bullet_list, nodes.docinfo,
nodes.definition_list, nodes.enumerated_list,
nodes.field_list, nodes.option_list,
nodes.table)):
# Insert target right in front of element.
prefix.append('<span id="%s"></span>' % id)
else:
# Non-empty tag. Place the auxiliary <span> tag
# *inside* the element, as the first child.
suffix += '<span id="%s"></span>' % id
attlist = list(atts.items())
attlist.sort()
parts = [tagname]
for name, value in attlist:
# value=None was used for boolean attributes without
# value, but this isn't supported by XHTML.
assert value is not None
if isinstance(value, list):
values = [str(v) for v in value]
parts.append('%s="%s"' % (name.lower(),
self.attval(' '.join(values))))
else:
parts.append('%s="%s"' % (name.lower(),
self.attval(str(value))))
if empty:
infix = ' /'
else:
infix = ''
return ''.join(prefix) + '<%s%s>' % (' '.join(parts), infix) + suffix
[docs] def emptytag(self, node, tagname, suffix='\n', **attributes):
"""Construct and return an XML-compatible empty tag."""
return self.starttag(node, tagname, suffix, empty=True, **attributes)
[docs] def set_class_on_child(self, node, class_, index=0):
"""
Set class `class_` on the visible child no. index of `node`.
Do nothing if node has fewer children than `index`.
"""
children = [n for n in node if not isinstance(n, nodes.Invisible)]
try:
child = children[index]
except IndexError:
return
child['classes'].append(class_)
[docs] def visit_Text(self, node):
text = node.astext()
encoded = self.encode(text)
if self.in_mailto and self.settings.cloak_email_addresses:
encoded = self.cloak_email(encoded)
self.body.append(encoded)
[docs] def depart_Text(self, node):
pass
[docs] def visit_abbreviation(self, node):
# @@@ implementation incomplete ("title" attribute)
self.body.append(self.starttag(node, 'abbr', ''))
[docs] def depart_abbreviation(self, node):
self.body.append('</abbr>')
[docs] def visit_acronym(self, node):
# @@@ implementation incomplete ("title" attribute)
self.body.append(self.starttag(node, 'acronym', ''))
[docs] def depart_acronym(self, node):
self.body.append('</acronym>')
[docs] def visit_address(self, node):
self.visit_docinfo_item(node, 'address', meta=False)
self.body.append(self.starttag(node, 'pre',
suffix= '', CLASS='address'))
[docs] def depart_address(self, node):
self.body.append('\n</pre>\n')
self.depart_docinfo_item()
[docs] def visit_admonition(self, node):
node['classes'].insert(0, 'admonition')
self.body.append(self.starttag(node, 'div'))
[docs] def depart_admonition(self, node=None):
self.body.append('</div>\n')
attribution_formats = {'dash': ('\u2014', ''),
'parentheses': ('(', ')'),
'parens': ('(', ')'),
'none': ('', '')}
[docs] def visit_attribution(self, node):
prefix, suffix = self.attribution_formats[self.settings.attribution]
self.context.append(suffix)
self.body.append(
self.starttag(node, 'p', prefix, CLASS='attribution'))
[docs] def depart_attribution(self, node):
self.body.append(self.context.pop() + '</p>\n')
[docs] def visit_author(self, node):
if not(isinstance(node.parent, nodes.authors)):
self.visit_docinfo_item(node, 'author')
self.body.append('<p>')
[docs] def depart_author(self, node):
self.body.append('</p>')
if isinstance(node.parent, nodes.authors):
self.body.append('\n')
else:
self.depart_docinfo_item()
[docs] def visit_authors(self, node):
self.visit_docinfo_item(node, 'authors')
[docs] def depart_authors(self, node):
self.depart_docinfo_item()
[docs] def visit_block_quote(self, node):
self.body.append(self.starttag(node, 'blockquote'))
[docs] def depart_block_quote(self, node):
self.body.append('</blockquote>\n')
[docs] def check_simple_list(self, node):
"""Check for a simple list that can be rendered compactly."""
visitor = SimpleListChecker(self.document)
try:
node.walk(visitor)
except nodes.NodeFound:
return False
else:
return True
# Compact lists
# ------------
# Include definition lists and field lists (in addition to ordered
# and unordered lists) in the test if a list is "simple" (cf. the
# html4css1.HTMLTranslator docstring and the SimpleListChecker class at
# the end of this file).
[docs] def is_compactable(self, node):
# print "is_compactable %s ?" % node.__class__,
# explicite class arguments have precedence
if 'compact' in node['classes']:
return True
if 'open' in node['classes']:
return False
# check config setting:
if (isinstance(node, (nodes.field_list, nodes.definition_list))
and not self.settings.compact_field_lists):
# print "`compact-field-lists` is False"
return False
if (isinstance(node, (nodes.enumerated_list, nodes.bullet_list))
and not self.settings.compact_lists):
# print "`compact-lists` is False"
return False
# more special cases:
if (self.topic_classes == ['contents']): # TODO: self.in_contents
return True
# check the list items:
return self.check_simple_list(node)
[docs] def visit_bullet_list(self, node):
atts = {}
old_compact_simple = self.compact_simple
self.context.append((self.compact_simple, self.compact_p))
self.compact_p = None
self.compact_simple = self.is_compactable(node)
if self.compact_simple and not old_compact_simple:
atts['class'] = 'simple'
self.body.append(self.starttag(node, 'ul', **atts))
[docs] def depart_bullet_list(self, node):
self.compact_simple, self.compact_p = self.context.pop()
self.body.append('</ul>\n')
[docs] def visit_caption(self, node):
self.body.append(self.starttag(node, 'p', '', CLASS='caption'))
[docs] def depart_caption(self, node):
self.body.append('</p>\n')
# citations
# ---------
# Use definition list instead of table for bibliographic references.
# Join adjacent citation entries.
[docs] def visit_citation(self, node):
if not self.in_footnote_list:
self.body.append('<dl class="citation">\n')
self.in_footnote_list = True
[docs] def depart_citation(self, node):
self.body.append('</dd>\n')
if not isinstance(node.next_node(descend=False, siblings=True),
nodes.citation):
self.body.append('</dl>\n')
self.in_footnote_list = False
[docs] def visit_citation_reference(self, node):
href = '#'
if 'refid' in node:
href += node['refid']
elif 'refname' in node:
href += self.document.nameids[node['refname']]
# else: # TODO system message (or already in the transform)?
# 'Citation reference missing.'
self.body.append(self.starttag(
node, 'a', '[', CLASS='citation-reference', href=href))
[docs] def depart_citation_reference(self, node):
self.body.append(']</a>')
# classifier
# ----------
# don't insert classifier-delimiter here (done by CSS)
[docs] def visit_classifier(self, node):
self.body.append(self.starttag(node, 'span', '', CLASS='classifier'))
[docs] def depart_classifier(self, node):
self.body.append('</span>')
[docs] def visit_colspec(self, node):
self.colspecs.append(node)
# "stubs" list is an attribute of the tgroup element:
node.parent.stubs.append(node.attributes.get('stub'))
[docs] def depart_colspec(self, node):
# write out <colgroup> when all colspecs are processed
if isinstance(node.next_node(descend=False, siblings=True),
nodes.colspec):
return
if 'colwidths-auto' in node.parent.parent['classes'] or (
'colwidths-auto' in self.settings.table_style and
('colwidths-given' not in node.parent.parent['classes'])):
return
total_width = sum(node['colwidth'] for node in self.colspecs)
self.body.append(self.starttag(node, 'colgroup'))
for node in self.colspecs:
colwidth = int(node['colwidth'] * 100.0 / total_width + 0.5)
self.body.append(self.emptytag(node, 'col',
style='width: %i%%' % colwidth))
self.body.append('</colgroup>\n')
[docs] def visit_compound(self, node):
self.body.append(self.starttag(node, 'div', CLASS='compound'))
if len(node) > 1:
node[0]['classes'].append('compound-first')
node[-1]['classes'].append('compound-last')
for child in node[1:-1]:
child['classes'].append('compound-middle')
[docs] def depart_compound(self, node):
self.body.append('</div>\n')
[docs] def visit_container(self, node):
self.body.append(self.starttag(node, 'div', CLASS='docutils container'))
[docs] def depart_container(self, node):
self.body.append('</div>\n')
[docs] def visit_copyright(self, node):
self.visit_docinfo_item(node, 'copyright')
[docs] def depart_copyright(self, node):
self.depart_docinfo_item()
[docs] def visit_date(self, node):
self.visit_docinfo_item(node, 'date')
[docs] def depart_date(self, node):
self.depart_docinfo_item()
[docs] def visit_decoration(self, node):
pass
[docs] def depart_decoration(self, node):
pass
[docs] def visit_definition(self, node):
self.body.append('</dt>\n')
self.body.append(self.starttag(node, 'dd', ''))
[docs] def depart_definition(self, node):
self.body.append('</dd>\n')
[docs] def visit_definition_list(self, node):
classes = node.setdefault('classes', [])
if self.is_compactable(node):
classes.append('simple')
self.body.append(self.starttag(node, 'dl'))
[docs] def depart_definition_list(self, node):
self.body.append('</dl>\n')
[docs] def visit_definition_list_item(self, node):
# pass class arguments, ids and names to definition term:
node.children[0]['classes'] = (
node.get('classes', []) + node.children[0].get('classes', []))
node.children[0]['ids'] = (
node.get('ids', []) + node.children[0].get('ids', []))
node.children[0]['names'] = (
node.get('names', []) + node.children[0].get('names', []))
[docs] def depart_definition_list_item(self, node):
pass
[docs] def visit_description(self, node):
self.body.append(self.starttag(node, 'dd', ''))
[docs] def depart_description(self, node):
self.body.append('</dd>\n')
[docs] def visit_docinfo(self, node):
classes = 'docinfo'
if (self.is_compactable(node)):
classes += ' simple'
self.body.append(self.starttag(node, 'dl', CLASS=classes))
[docs] def depart_docinfo(self, node):
self.body.append('</dl>\n')
[docs] def visit_docinfo_item(self, node, name, meta=True):
if meta:
meta_tag = '<meta name="%s" content="%s" />\n' \
% (name, self.attval(node.astext()))
self.add_meta(meta_tag)
self.body.append('<dt class="%s">%s</dt>\n'
% (name, self.language.labels[name]))
self.body.append(self.starttag(node, 'dd', '', CLASS=name))
[docs] def depart_docinfo_item(self):
self.body.append('</dd>\n')
[docs] def visit_doctest_block(self, node):
self.body.append(self.starttag(node, 'pre', suffix='',
CLASS='code python doctest'))
[docs] def depart_doctest_block(self, node):
self.body.append('\n</pre>\n')
[docs] def visit_document(self, node):
title = (node.get('title', '') or os.path.basename(node['source'])
or 'docutils document without title')
self.head.append('<title>%s</title>\n' % self.encode(title))
[docs] def depart_document(self, node):
self.head_prefix.extend([self.doctype,
self.head_prefix_template %
{'lang': self.settings.language_code}])
self.html_prolog.append(self.doctype)
self.meta.insert(0, self.content_type % self.settings.output_encoding)
self.head.insert(0, self.content_type % self.settings.output_encoding)
if self.math_header:
if self.math_output == 'mathjax':
self.head.extend(self.math_header)
else:
self.stylesheet.extend(self.math_header)
# skip content-type meta tag with interpolated charset value:
self.html_head.extend(self.head[1:])
self.body_prefix.append(self.starttag(node, 'div', CLASS='document'))
self.body_suffix.insert(0, '</div>\n')
self.fragment.extend(self.body) # self.fragment is the "naked" body
self.html_body.extend(self.body_prefix[1:] + self.body_pre_docinfo
+ self.docinfo + self.body
+ self.body_suffix[:-1])
assert not self.context, 'len(context) = %s' % len(self.context)
[docs] def visit_emphasis(self, node):
self.body.append(self.starttag(node, 'em', ''))
[docs] def depart_emphasis(self, node):
self.body.append('</em>')
[docs] def visit_entry(self, node):
atts = {'class': []}
if isinstance(node.parent.parent, nodes.thead):
atts['class'].append('head')
if node.parent.parent.parent.stubs[node.parent.column]:
# "stubs" list is an attribute of the tgroup element
atts['class'].append('stub')
if atts['class']:
tagname = 'th'
atts['class'] = ' '.join(atts['class'])
else:
tagname = 'td'
del atts['class']
node.parent.column += 1
if 'morerows' in node:
atts['rowspan'] = node['morerows'] + 1
if 'morecols' in node:
atts['colspan'] = node['morecols'] + 1
node.parent.column += node['morecols']
self.body.append(self.starttag(node, tagname, '', **atts))
self.context.append('</%s>\n' % tagname.lower())
# TODO: why does the html4css1 writer insert an NBSP into empty cells?
# if len(node) == 0: # empty cell
# self.body.append(' ') # no-break space
[docs] def depart_entry(self, node):
self.body.append(self.context.pop())
[docs] def visit_enumerated_list(self, node):
atts = {}
if 'start' in node:
atts['start'] = node['start']
if 'enumtype' in node:
atts['class'] = node['enumtype']
if self.is_compactable(node):
atts['class'] = (atts.get('class', '') + ' simple').strip()
self.body.append(self.starttag(node, 'ol', **atts))
[docs] def depart_enumerated_list(self, node):
self.body.append('</ol>\n')
[docs] def visit_field_list(self, node):
# Keep simple paragraphs in the field_body to enable CSS
# rule to start body on new line if the label is too long
classes = 'field-list'
if (self.is_compactable(node)):
classes += ' simple'
self.body.append(self.starttag(node, 'dl', CLASS=classes))
[docs] def depart_field_list(self, node):
self.body.append('</dl>\n')
[docs] def visit_field(self, node):
pass
[docs] def depart_field(self, node):
pass
# as field is ignored, pass class arguments to field-name and field-body:
[docs] def visit_field_name(self, node):
self.body.append(self.starttag(node, 'dt', '',
CLASS=''.join(node.parent['classes'])))
[docs] def depart_field_name(self, node):
self.body.append('</dt>\n')
[docs] def visit_field_body(self, node):
self.body.append(self.starttag(node, 'dd', '',
CLASS=''.join(node.parent['classes'])))
# prevent misalignment of following content if the field is empty:
if not node.children:
self.body.append('<p></p>')
[docs] def depart_field_body(self, node):
self.body.append('</dd>\n')
# use HTML 5 <footer> element?
# footnotes
# ---------
# use definition list instead of table for footnote text
# TODO: use the new HTML5 element <aside>? (Also for footnote text)
# Docutils-generated text: put section numbers in a span for CSS styling:
[docs] def visit_generated(self, node):
if 'sectnum' in node['classes']:
# get section number (strip trailing no-break-spaces)
sectnum = node.astext().rstrip(' ')
# print sectnum.encode('utf-8')
self.body.append('<span class="sectnum">%s</span> '
% self.encode(sectnum))
# Content already processed:
raise nodes.SkipNode
[docs] def depart_generated(self, node):
pass
# Image types to place in an <object> element
object_image_types = {'.swf': 'application/x-shockwave-flash'}
[docs] def visit_image(self, node):
atts = {}
uri = node['uri']
ext = os.path.splitext(uri)[1].lower()
if ext in self.object_image_types:
atts['data'] = uri
atts['type'] = self.object_image_types[ext]
else:
atts['src'] = uri
atts['alt'] = node.get('alt', uri)
# image size
if 'width' in node:
atts['width'] = node['width']
if 'height' in node:
atts['height'] = node['height']
if 'scale' in node:
if (PIL and not ('width' in node and 'height' in node)
and self.settings.file_insertion_enabled):
imagepath = urllib.request.url2pathname(uri)
try:
img = PIL.Image.open(
imagepath.encode(sys.getfilesystemencoding()))
except (IOError, UnicodeEncodeError):
pass # TODO: warn?
else:
self.settings.record_dependencies.add(
imagepath.replace('\\', '/'))
if 'width' not in atts:
atts['width'] = '%dpx' % img.size[0]
if 'height' not in atts:
atts['height'] = '%dpx' % img.size[1]
del img
for att_name in 'width', 'height':
if att_name in atts:
match = re.match(r'([0-9.]+)(\S*)$', atts[att_name])
assert match
atts[att_name] = '%s%s' % (
float(match.group(1)) * (float(node['scale']) / 100),
match.group(2))
style = []
for att_name in 'width', 'height':
if att_name in atts:
if re.match(r'^[0-9.]+$', atts[att_name]):
# Interpret unitless values as pixels.
atts[att_name] += 'px'
style.append('%s: %s;' % (att_name, atts[att_name]))
del atts[att_name]
if style:
atts['style'] = ' '.join(style)
if (isinstance(node.parent, nodes.TextElement) or
(isinstance(node.parent, nodes.reference) and
not isinstance(node.parent.parent, nodes.TextElement))):
# Inline context or surrounded by <a>...</a>.
suffix = ''
else:
suffix = '\n'
if 'align' in node:
atts['class'] = 'align-%s' % node['align']
if ext in self.object_image_types:
# do NOT use an empty tag: incorrect rendering in browsers
self.body.append(self.starttag(node, 'object', suffix, **atts) +
node.get('alt', uri) + '</object>' + suffix)
else:
self.body.append(self.emptytag(node, 'img', suffix, **atts))
[docs] def depart_image(self, node):
# self.body.append(self.context.pop())
pass
[docs] def visit_inline(self, node):
self.body.append(self.starttag(node, 'span', ''))
[docs] def depart_inline(self, node):
self.body.append('</span>')
# footnote and citation labels:
[docs] def visit_label(self, node):
if (isinstance(node.parent, nodes.footnote)):
classes = self.settings.footnote_references
else:
classes = 'brackets'
# pass parent node to get id into starttag:
self.body.append(self.starttag(node.parent, 'dt', '', CLASS='label'))
self.body.append(self.starttag(node, 'span', '', CLASS=classes))
# footnote/citation backrefs:
if self.settings.footnote_backlinks:
backrefs = node.parent['backrefs']
if len(backrefs) == 1:
self.body.append('<a class="fn-backref" href="#%s">'
% backrefs[0])
[docs] def depart_label(self, node):
if self.settings.footnote_backlinks:
backrefs = node.parent['backrefs']
if len(backrefs) == 1:
self.body.append('</a>')
self.body.append('</span>')
if self.settings.footnote_backlinks and len(backrefs) > 1:
# Python 2.4 fails with enumerate(backrefs, 1)
backlinks = ['<a href="#%s">%s</a>' % (ref, i+1)
for (i, ref) in enumerate(backrefs)]
self.body.append('<span class="fn-backref">(%s)</span>'
% ','.join(backlinks))
self.body.append('</dt>\n<dd>')
[docs] def visit_legend(self, node):
self.body.append(self.starttag(node, 'div', CLASS='legend'))
[docs] def depart_legend(self, node):
self.body.append('</div>\n')
[docs] def visit_line(self, node):
self.body.append(self.starttag(node, 'div', suffix='', CLASS='line'))
if not len(node):
self.body.append('<br />')
[docs] def depart_line(self, node):
self.body.append('</div>\n')
[docs] def visit_line_block(self, node):
self.body.append(self.starttag(node, 'div', CLASS='line-block'))
[docs] def depart_line_block(self, node):
self.body.append('</div>\n')
[docs] def visit_list_item(self, node):
self.body.append(self.starttag(node, 'li', ''))
[docs] def depart_list_item(self, node):
self.body.append('</li>\n')
# inline literal
[docs] def visit_literal(self, node):
# special case: "code" role
classes = node.get('classes', [])
if 'code' in classes:
# filter 'code' from class arguments
node['classes'] = [cls for cls in classes if cls != 'code']
self.body.append(self.starttag(node, 'code', ''))
return
self.body.append(
self.starttag(node, 'span', '', CLASS='docutils literal'))
text = node.astext()
# remove hard line breaks (except if in a parsed-literal block)
if not isinstance(node.parent, nodes.literal_block):
text = text.replace('\n', ' ')
# Protect text like ``--an-option`` and the regular expression
# ``[+]?(\d+(\.\d*)?|\.\d+)`` from bad line wrapping
for token in self.words_and_spaces.findall(text):
if token.strip() and self.in_word_wrap_point.search(token):
self.body.append('<span class="pre">%s</span>'
% self.encode(token))
else:
self.body.append(self.encode(token))
self.body.append('</span>')
# Content already processed:
raise nodes.SkipNode
[docs] def depart_literal(self, node):
# skipped unless literal element is from "code" role:
self.body.append('</code>')
[docs] def visit_literal_block(self, node):
self.body.append(self.starttag(node, 'pre', '', CLASS='literal-block'))
if 'code' in node.get('classes', []):
self.body.append('<code>')
[docs] def depart_literal_block(self, node):
if 'code' in node.get('classes', []):
self.body.append('</code>')
self.body.append('</pre>\n')
# Mathematics:
# As there is no native HTML math support, we provide alternatives
# for the math-output: LaTeX and MathJax simply wrap the content,
# HTML and MathML also convert the math_code.
# HTML container
math_tags = {# math_output: (block, inline, class-arguments)
'mathml': ('div', '', ''),
'html': ('div', 'span', 'formula'),
'mathjax': ('div', 'span', 'math'),
'latex': ('pre', 'tt', 'math'),
}
[docs] def visit_math(self, node, math_env=''):
# If the method is called from visit_math_block(), math_env != ''.
if self.math_output not in self.math_tags:
self.document.reporter.error(
'math-output format "%s" not supported '
'falling back to "latex"'% self.math_output)
self.math_output = 'latex'
tag = self.math_tags[self.math_output][math_env == '']
clsarg = self.math_tags[self.math_output][2]
# LaTeX container
wrappers = {# math_mode: (inline, block)
'mathml': ('$%s$', '\\begin{%s}\n%s\n\\end{%s}'),
'html': ('$%s$', '\\begin{%s}\n%s\n\\end{%s}'),
'mathjax': (r'\(%s\)', '\\begin{%s}\n%s\n\\end{%s}'),
'latex': (None, None),
}
wrapper = wrappers[self.math_output][math_env != '']
if self.math_output == 'mathml' and (not self.math_output_options or
self.math_output_options[0] == 'blahtexml'):
wrapper = None
# get and wrap content
math_code = node.astext().translate(unichar2tex.uni2tex_table)
if wrapper:
try: # wrapper with three "%s"
math_code = wrapper % (math_env, math_code, math_env)
except TypeError: # wrapper with one "%s"
math_code = wrapper % math_code
# settings and conversion
if self.math_output in ('latex', 'mathjax'):
math_code = self.encode(math_code)
if self.math_output == 'mathjax' and not self.math_header:
try:
self.mathjax_url = self.math_output_options[0]
except IndexError:
self.document.reporter.warning('No MathJax URL specified, '
'using local fallback (see config.html)')
# append configuration, if not already present in the URL:
# input LaTeX with AMS, output common HTML
if '?' not in self.mathjax_url:
self.mathjax_url += '?config=TeX-AMS_CHTML'
self.math_header = [self.mathjax_script % self.mathjax_url]
elif self.math_output == 'html':
if self.math_output_options and not self.math_header:
self.math_header = [self.stylesheet_call(
utils.find_file_in_dirs(s, self.settings.stylesheet_dirs))
for s in self.math_output_options[0].split(',')]
# TODO: fix display mode in matrices and fractions
math2html.DocumentParameters.displaymode = (math_env != '')
math_code = math2html.math2html(math_code)
elif self.math_output == 'mathml':
if 'XHTML 1' in self.doctype:
self.doctype = self.doctype_mathml
self.content_type = self.content_type_mathml
converter = ' '.join(self.math_output_options).lower()
try:
if converter == 'latexml':
math_code = tex2mathml_extern.latexml(math_code,
self.document.reporter)
elif converter == 'ttm':
math_code = tex2mathml_extern.ttm(math_code,
self.document.reporter)
elif converter == 'blahtexml':
math_code = tex2mathml_extern.blahtexml(math_code,
inline=not(math_env),
reporter=self.document.reporter)
elif not converter:
math_code = latex2mathml.tex2mathml(math_code,
inline=not(math_env))
else:
self.document.reporter.error('option "%s" not supported '
'with math-output "MathML"')
except OSError:
raise OSError('is "latexmlmath" in your PATH?')
except SyntaxError as err:
err_node = self.document.reporter.error(err, base_node=node)
self.visit_system_message(err_node)
self.body.append(self.starttag(node, 'p'))
self.body.append(','.join(err.args))
self.body.append('</p>\n')
self.body.append(self.starttag(node, 'pre',
CLASS='literal-block'))
self.body.append(self.encode(math_code))
self.body.append('\n</pre>\n')
self.depart_system_message(err_node)
raise nodes.SkipNode
# append to document body
if tag:
self.body.append(self.starttag(node, tag,
suffix='\n'*bool(math_env),
CLASS=clsarg))
self.body.append(math_code)
if math_env: # block mode (equation, display)
self.body.append('\n')
if tag:
self.body.append('</%s>' % tag)
if math_env:
self.body.append('\n')
# Content already processed:
raise nodes.SkipNode
[docs] def depart_math(self, node):
pass # never reached
[docs] def visit_math_block(self, node):
# print node.astext().encode('utf8')
math_env = pick_math_environment(node.astext())
self.visit_math(node, math_env=math_env)
[docs] def depart_math_block(self, node):
pass # never reached
# Meta tags: 'lang' attribute replaced by 'xml:lang' in XHTML 1.1
# HTML5/polyglot recommends using both
[docs] def visit_option(self, node):
self.body.append(self.starttag(node, 'span', '', CLASS='option'))
[docs] def depart_option(self, node):
self.body.append('</span>')
if isinstance(node.next_node(descend=False, siblings=True),
nodes.option):
self.body.append(', ')
[docs] def visit_option_argument(self, node):
self.body.append(node.get('delimiter', ' '))
self.body.append(self.starttag(node, 'var', ''))
[docs] def depart_option_argument(self, node):
self.body.append('</var>')
[docs] def visit_option_group(self, node):
self.body.append(self.starttag(node, 'dt', ''))
self.body.append('<kbd>')
[docs] def depart_option_group(self, node):
self.body.append('</kbd></dt>\n')
[docs] def visit_option_list(self, node):
self.body.append(
self.starttag(node, 'dl', CLASS='option-list'))
[docs] def depart_option_list(self, node):
self.body.append('</dl>\n')
[docs] def visit_option_list_item(self, node):
pass
[docs] def depart_option_list_item(self, node):
pass
[docs] def visit_option_string(self, node):
pass
[docs] def depart_option_string(self, node):
pass
[docs] def visit_organization(self, node):
self.visit_docinfo_item(node, 'organization')
[docs] def depart_organization(self, node):
self.depart_docinfo_item()
# Do not omit <p> tags
# --------------------
#
# The HTML4CSS1 writer does this to "produce
# visually compact lists (less vertical whitespace)". This writer
# relies on CSS rules for"visual compactness".
#
# * In XHTML 1.1, e.g. a <blockquote> element may not contain
# character data, so you cannot drop the <p> tags.
# * Keeping simple paragraphs in the field_body enables a CSS
# rule to start the field-body on a new line if the label is too long
# * it makes the code simpler.
#
# TODO: omit paragraph tags in simple table cells?
[docs] def visit_paragraph(self, node):
self.body.append(self.starttag(node, 'p', ''))
[docs] def depart_paragraph(self, node):
self.body.append('</p>')
if not (isinstance(node.parent, (nodes.list_item, nodes.entry)) and
(len(node.parent) == 1)):
self.body.append('\n')
[docs] def visit_problematic(self, node):
if node.hasattr('refid'):
self.body.append('<a href="#%s">' % node['refid'])
self.context.append('</a>')
else:
self.context.append('')
self.body.append(self.starttag(node, 'span', '', CLASS='problematic'))
[docs] def depart_problematic(self, node):
self.body.append('</span>')
self.body.append(self.context.pop())
[docs] def visit_raw(self, node):
if 'html' in node.get('format', '').split():
t = isinstance(node.parent, nodes.TextElement) and 'span' or 'div'
if node['classes']:
self.body.append(self.starttag(node, t, suffix=''))
self.body.append(node.astext())
if node['classes']:
self.body.append('</%s>' % t)
# Keep non-HTML raw text out of output:
raise nodes.SkipNode
[docs] def visit_reference(self, node):
atts = {'class': 'reference'}
if 'refuri' in node:
atts['href'] = node['refuri']
if ( self.settings.cloak_email_addresses
and atts['href'].startswith('mailto:')):
atts['href'] = self.cloak_mailto(atts['href'])
self.in_mailto = True
atts['class'] += ' external'
else:
assert 'refid' in node, \
'References must have "refuri" or "refid" attribute.'
atts['href'] = '#' + node['refid']
atts['class'] += ' internal'
if not isinstance(node.parent, nodes.TextElement):
assert len(node) == 1 and isinstance(node[0], nodes.image)
atts['class'] += ' image-reference'
self.body.append(self.starttag(node, 'a', '', **atts))
[docs] def depart_reference(self, node):
self.body.append('</a>')
if not isinstance(node.parent, nodes.TextElement):
self.body.append('\n')
self.in_mailto = False
[docs] def visit_revision(self, node):
self.visit_docinfo_item(node, 'revision', meta=False)
[docs] def depart_revision(self, node):
self.depart_docinfo_item()
[docs] def visit_row(self, node):
self.body.append(self.starttag(node, 'tr', ''))
node.column = 0
[docs] def depart_row(self, node):
self.body.append('</tr>\n')
[docs] def visit_rubric(self, node):
self.body.append(self.starttag(node, 'p', '', CLASS='rubric'))
[docs] def depart_rubric(self, node):
self.body.append('</p>\n')
# TODO: use the new HTML 5 element <section>?
[docs] def visit_section(self, node):
self.section_level += 1
self.body.append(
self.starttag(node, 'div', CLASS='section'))
[docs] def depart_section(self, node):
self.section_level -= 1
self.body.append('</div>\n')
# TODO: use the new HTML5 element <aside>? (Also for footnote text)
[docs] def visit_status(self, node):
self.visit_docinfo_item(node, 'status', meta=False)
[docs] def depart_status(self, node):
self.depart_docinfo_item()
[docs] def visit_strong(self, node):
self.body.append(self.starttag(node, 'strong', ''))
[docs] def depart_strong(self, node):
self.body.append('</strong>')
[docs] def visit_subscript(self, node):
self.body.append(self.starttag(node, 'sub', ''))
[docs] def depart_subscript(self, node):
self.body.append('</sub>')
[docs] def visit_substitution_definition(self, node):
"""Internal only."""
raise nodes.SkipNode
[docs] def visit_substitution_reference(self, node):
self.unimplemented_visit(node)
# h1–h6 elements must not be used to markup subheadings, subtitles,
# alternative titles and taglines unless intended to be the heading for a
# new section or subsection.
# -- http://www.w3.org/TR/html/sections.html#headings-and-sections
[docs] def visit_subtitle(self, node):
if isinstance(node.parent, nodes.sidebar):
classes = 'sidebar-subtitle'
elif isinstance(node.parent, nodes.document):
classes = 'subtitle'
self.in_document_title = len(self.body)
elif isinstance(node.parent, nodes.section):
classes = 'section-subtitle'
self.body.append(self.starttag(node, 'p', '', CLASS=classes))
[docs] def depart_subtitle(self, node):
self.body.append('</p>\n')
if self.in_document_title:
self.subtitle = self.body[self.in_document_title:-1]
self.in_document_title = 0
self.body_pre_docinfo.extend(self.body)
self.html_subtitle.extend(self.body)
del self.body[:]
[docs] def visit_superscript(self, node):
self.body.append(self.starttag(node, 'sup', ''))
[docs] def depart_superscript(self, node):
self.body.append('</sup>')
[docs] def visit_system_message(self, node):
self.body.append(self.starttag(node, 'div', CLASS='system-message'))
self.body.append('<p class="system-message-title">')
backref_text = ''
if len(node['backrefs']):
backrefs = node['backrefs']
if len(backrefs) == 1:
backref_text = ('; <em><a href="#%s">backlink</a></em>'
% backrefs[0])
else:
i = 1
backlinks = []
for backref in backrefs:
backlinks.append('<a href="#%s">%s</a>' % (backref, i))
i += 1
backref_text = ('; <em>backlinks: %s</em>'
% ', '.join(backlinks))
if node.hasattr('line'):
line = ', line %s' % node['line']
else:
line = ''
self.body.append('System Message: %s/%s '
'(<span class="docutils literal">%s</span>%s)%s</p>\n'
% (node['type'], node['level'],
self.encode(node['source']), line, backref_text))
[docs] def depart_system_message(self, node):
self.body.append('</div>\n')
# tables
# ------
# no hard-coded border setting in the table head::
[docs] def visit_table(self, node):
classes = [cls.strip(' \t\n')
for cls in self.settings.table_style.split(',')]
if 'align' in node:
classes.append('align-%s' % node['align'])
tag = self.starttag(node, 'table', CLASS=' '.join(classes))
self.body.append(tag)
[docs] def depart_table(self, node):
self.body.append('</table>\n')
[docs] def visit_target(self, node):
if not ('refuri' in node or 'refid' in node
or 'refname' in node):
self.body.append(self.starttag(node, 'span', '', CLASS='target'))
self.context.append('</span>')
else:
self.context.append('')
[docs] def depart_target(self, node):
self.body.append(self.context.pop())
# no hard-coded vertical alignment in table body
[docs] def visit_tbody(self, node):
self.body.append(self.starttag(node, 'tbody'))
[docs] def depart_tbody(self, node):
self.body.append('</tbody>\n')
[docs] def visit_term(self, node):
self.body.append(self.starttag(node, 'dt', ''))
[docs] def depart_term(self, node):
"""
Leave the end tag to `self.visit_definition()`, in case there's a
classifier.
"""
pass
[docs] def visit_tgroup(self, node):
self.colspecs = []
node.stubs = []
[docs] def depart_tgroup(self, node):
pass
[docs] def visit_thead(self, node):
self.body.append(self.starttag(node, 'thead'))
[docs] def depart_thead(self, node):
self.body.append('</thead>\n')
[docs] def visit_title(self, node):
"""Only 6 section levels are supported by HTML."""
check_id = 0 # TODO: is this a bool (False) or a counter?
close_tag = '</p>\n'
if isinstance(node.parent, nodes.topic):
self.body.append(
self.starttag(node, 'p', '', CLASS='topic-title first'))
elif isinstance(node.parent, nodes.sidebar):
self.body.append(
self.starttag(node, 'p', '', CLASS='sidebar-title'))
elif isinstance(node.parent, nodes.Admonition):
self.body.append(
self.starttag(node, 'p', '', CLASS='admonition-title'))
elif isinstance(node.parent, nodes.table):
self.body.append(
self.starttag(node, 'caption', ''))
close_tag = '</caption>\n'
elif isinstance(node.parent, nodes.document):
self.body.append(self.starttag(node, 'h1', '', CLASS='title'))
close_tag = '</h1>\n'
self.in_document_title = len(self.body)
else:
assert isinstance(node.parent, nodes.section)
h_level = self.section_level + self.initial_header_level - 1
atts = {}
if (len(node.parent) >= 2 and
isinstance(node.parent[1], nodes.subtitle)):
atts['CLASS'] = 'with-subtitle'
self.body.append(
self.starttag(node, 'h%s' % h_level, '', **atts))
atts = {}
if node.hasattr('refid'):
atts['class'] = 'toc-backref'
atts['href'] = '#' + node['refid']
if atts:
self.body.append(self.starttag({}, 'a', '', **atts))
close_tag = '</a></h%s>\n' % (h_level)
else:
close_tag = '</h%s>\n' % (h_level)
self.context.append(close_tag)
[docs] def depart_title(self, node):
self.body.append(self.context.pop())
if self.in_document_title:
self.title = self.body[self.in_document_title:-1]
self.in_document_title = 0
self.body_pre_docinfo.extend(self.body)
self.html_title.extend(self.body)
del self.body[:]
[docs] def visit_title_reference(self, node):
self.body.append(self.starttag(node, 'cite', ''))
[docs] def depart_title_reference(self, node):
self.body.append('</cite>')
# TODO: use the new HTML5 element <aside>? (Also for footnote text)
[docs] def visit_topic(self, node):
self.body.append(self.starttag(node, 'div', CLASS='topic'))
self.topic_classes = node['classes']
# TODO: replace with ::
# self.in_contents = 'contents' in node['classes']
[docs] def depart_topic(self, node):
self.body.append('</div>\n')
self.topic_classes = []
# TODO self.in_contents = False
[docs] def visit_transition(self, node):
self.body.append(self.emptytag(node, 'hr', CLASS='docutils'))
[docs] def depart_transition(self, node):
pass
[docs] def visit_version(self, node):
self.visit_docinfo_item(node, 'version', meta=False)
[docs] def depart_version(self, node):
self.depart_docinfo_item()
[docs] def unimplemented_visit(self, node):
raise NotImplementedError('visiting unimplemented node type: %s'
% node.__class__.__name__)
[docs]class SimpleListChecker(nodes.GenericNodeVisitor):
"""
Raise `nodes.NodeFound` if non-simple list item is encountered.
Here "simple" means a list item containing nothing other than a single
paragraph, a simple list, or a paragraph followed by a simple list.
This version also checks for simple field lists and docinfo.
"""
[docs] def default_visit(self, node):
raise nodes.NodeFound
[docs] def visit_list_item(self, node):
# print "visiting list item", node.__class__
children = [child for child in node.children
if not isinstance(child, nodes.Invisible)]
# print "has %s visible children" % len(children)
if (children and isinstance(children[0], nodes.paragraph)
and (isinstance(children[-1], nodes.bullet_list) or
isinstance(children[-1], nodes.enumerated_list) or
isinstance(children[-1], nodes.field_list))):
children.pop()
# print "%s children remain" % len(children)
if len(children) <= 1:
return
else:
# print "found", child.__class__, "in", node.__class__
raise nodes.NodeFound
[docs] def pass_node(self, node):
pass
[docs] def ignore_node(self, node):
# ignore nodes that are never complex (can contain only inline nodes)
raise nodes.SkipNode
# Paragraphs and text
visit_Text = ignore_node
visit_paragraph = ignore_node
# Lists
visit_bullet_list = pass_node
visit_enumerated_list = pass_node
visit_docinfo = pass_node
# Docinfo nodes:
visit_author = ignore_node
visit_authors = visit_list_item
visit_address = visit_list_item
visit_contact = pass_node
visit_copyright = ignore_node
visit_date = ignore_node
visit_organization = ignore_node
visit_status = ignore_node
visit_version = visit_list_item
# Definition list:
visit_definition_list = pass_node
visit_definition_list_item = pass_node
visit_term = ignore_node
visit_classifier = pass_node
visit_definition = visit_list_item
# Field list:
visit_field_list = pass_node
visit_field = pass_node
# the field body corresponds to a list item
visit_field_body = visit_list_item
visit_field_name = ignore_node
# Invisible nodes should be ignored.
visit_comment = ignore_node
visit_substitution_definition = ignore_node
visit_target = ignore_node
visit_pending = ignore_node