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Mini Shell
#!/usr/bin/env python3
# :Author: David Goodger, Günter Milde
# Based on the html4css1 writer by David Goodger.
# :Maintainer: docutils-develop@lists.sourceforge.net
# :Revision: $Revision: 9292 $
# :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: https://opensource.org/licenses/BSD-2-Clause
"""common definitions for Docutils HTML writers"""
import base64
import mimetypes
import os
import os.path
import re
from urllib.request import unquote as unquote_url
from urllib.request import url2pathname # unquote and use local path sep
import warnings
import docutils
from docutils import frontend, languages, nodes, utils, writers
from docutils.parsers.rst.directives import length_or_percentage_or_unitless
from docutils.parsers.rst.directives.images import PIL
from docutils.transforms import writer_aux
from docutils.utils.math import (unichar2tex, pick_math_environment,
math2html, latex2mathml, tex2mathml_extern)
class Writer(writers.Writer):
supported = ('html', 'xhtml') # update in subclass
"""Formats this writer supports."""
settings_spec = (
'HTML Writer Options',
None,
(('Specify the template file (UTF-8 encoded). '
'(default: writer dependent)',
['--template'],
{'metavar': '<file>'}),
('Comma separated list of stylesheet URLs. '
'Overrides previous --stylesheet and --stylesheet-path settings.',
['--stylesheet'],
{'metavar': '<URL[,URL,...]>', 'overrides': 'stylesheet_path',
'validator': frontend.validate_comma_separated_list}),
('Comma separated list of stylesheet paths. '
'Relative paths are expanded if a matching file is found in '
'the --stylesheet-dirs. With --link-stylesheet, '
'the path is rewritten relative to the output HTML file. '
'(default: writer dependent)',
['--stylesheet-path'],
{'metavar': '<file[,file,...]>', 'overrides': 'stylesheet',
'validator': frontend.validate_comma_separated_list}),
('Comma-separated list of directories where stylesheets are found. '
'Used by --stylesheet-path when expanding relative path arguments. '
'(default: writer dependent)',
['--stylesheet-dirs'],
{'metavar': '<dir[,dir,...]>',
'validator': frontend.validate_comma_separated_list}),
('Embed the stylesheet(s) in the output HTML file. The stylesheet '
'files must be accessible during processing. (default)',
['--embed-stylesheet'],
{'default': 1, 'action': 'store_true',
'validator': frontend.validate_boolean}),
('Link to the stylesheet(s) in the output HTML file. ',
['--link-stylesheet'],
{'dest': 'embed_stylesheet', 'action': 'store_false'}),
('Specify the initial header level. '
'Does not affect document title & subtitle (see --no-doc-title).'
'(default: writer dependent).',
['--initial-header-level'],
{'choices': '1 2 3 4 5 6'.split(), 'default': '2',
'metavar': '<level>'}),
('Format for footnote references: one of "superscript" or '
'"brackets". (default: "brackets")',
['--footnote-references'],
{'choices': ['superscript', 'brackets'], 'default': 'brackets',
'metavar': '<format>',
'overrides': 'trim_footnote_reference_space'}),
('Format for block quote attributions: '
'one of "dash" (em-dash prefix), "parentheses"/"parens", or "none". '
'(default: "dash")',
['--attribution'],
{'choices': ['dash', 'parentheses', 'parens', 'none'],
'default': 'dash', 'metavar': '<format>'}),
('Remove extra vertical whitespace between items of "simple" bullet '
'lists and enumerated lists. (default)',
['--compact-lists'],
{'default': True, 'action': 'store_true',
'validator': frontend.validate_boolean}),
('Disable compact simple bullet and enumerated lists.',
['--no-compact-lists'],
{'dest': 'compact_lists', 'action': 'store_false'}),
('Remove extra vertical whitespace between items of simple field '
'lists. (default)',
['--compact-field-lists'],
{'default': True, 'action': 'store_true',
'validator': frontend.validate_boolean}),
('Disable compact simple field lists.',
['--no-compact-field-lists'],
{'dest': 'compact_field_lists', 'action': 'store_false'}),
('Added to standard table classes. '
'Defined styles: borderless, booktabs, '
'align-left, align-center, align-right, '
'colwidths-auto, colwidths-grid.',
['--table-style'],
{'default': ''}),
('Math output format (one of "MathML", "HTML", "MathJax", '
'or "LaTeX") and option(s). '
'(default: "HTML math.css")',
['--math-output'],
{'default': 'HTML math.css'}),
('Prepend an XML declaration. ',
['--xml-declaration'],
{'default': False, 'action': 'store_true',
'validator': frontend.validate_boolean}),
('Omit the XML declaration.',
['--no-xml-declaration'],
{'dest': 'xml_declaration', 'action': 'store_false'}),
('Obfuscate email addresses to confuse harvesters while still '
'keeping email links usable with standards-compliant browsers.',
['--cloak-email-addresses'],
{'action': 'store_true', 'validator': frontend.validate_boolean}),
)
)
settings_defaults = {'output_encoding_error_handler': 'xmlcharrefreplace'}
config_section = 'html base writer' # overwrite 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')
def get_transforms(self):
return super().get_transforms() + [writer_aux.Admonitions]
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()
def apply_template(self):
with open(self.document.settings.template, encoding='utf-8') as fp:
template = fp.read()
subs = self.interpolation_dict()
return template % subs
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
def assemble_parts(self):
writers.Writer.assemble_parts(self)
for part in self.visitor_attributes:
self.parts[part] = ''.join(getattr(self, part))
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.
"""
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 = (
f'<meta name="generator" content="Docutils {docutils.__version__}: '
'https://docutils.sourceforge.io/" />\n')
# `starttag()` arguments for the main document (HTML5 uses <main>)
documenttag_args = {'tagname': 'div', 'CLASS': 'document'}
# 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`__.
__ https://docutils.sourceforge.io/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'[^ \n]+| +|\n')
# wrap point inside word:
in_word_wrap_point = re.compile(r'.+\W\W.+|[-?].+')
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)
# process settings
self.settings = settings = document.settings
self.language = languages.get_language(
settings.language_code, document.reporter)
self.initial_header_level = int(settings.initial_header_level)
# image_loading (only defined for HTML5 writer)
self.image_loading = getattr(settings, 'image_loading', None)
# legacy setting embed_images:
if getattr(settings, 'embed_images', None) is True:
warnings.warn('The configuration setting "embed_images" '
'will be removed in Docutils 2.0. '
'Use "image_loading: embed".',
FutureWarning, stacklevel=8)
if self.image_loading is None:
self.image_loading = 'embed'
if getattr(settings, 'embed_images', None) is False:
warnings.warn('The configuration setting "embed_images" '
'will be removed in Docutils 2.0. '
'Use "image_loading: link".',
FutureWarning, stacklevel=8)
if self.image_loading is None:
self.image_loading = 'link' # default
self.math_output = settings.math_output.split()
self.math_output_options = self.math_output[1:]
self.math_output = self.math_output[0].lower()
# set up "parts" (cf. docs/api/publisher.html#publish-parts-details)
#
self.body = [] # equivalent to `fragment`, ≠ `html_body`
self.body_prefix = ['</head>\n<body>\n'] # + optional header
self.body_pre_docinfo = [] # document heading (title and subtitle)
self.body_suffix = ['</body>\n</html>\n'] # + optional footer
self.docinfo = []
self.footer = []
self.fragment = [] # main content of the document ("naked" body)
self.head = []
self.head_prefix = [] # everything up to and including <head>
self.header = []
self.html_body = []
self.html_head = [self.content_type] # charset not interpolated
self.html_prolog = []
self.html_subtitle = []
self.html_title = []
self.meta = [self.generator]
self.stylesheet = [self.stylesheet_call(path)
for path in utils.get_stylesheet_list(settings)]
self.title = []
self.subtitle = []
if settings.xml_declaration:
self.head_prefix.append(
utils.xml_declaration(settings.output_encoding))
self.html_prolog.append(
utils.xml_declaration('%s')) # encoding not interpolated
if (settings.output_encoding
and settings.output_encoding.lower() != 'unicode'):
self.meta.insert(0, self.content_type % settings.output_encoding)
# bookkeeping attributes; reflect state of translator
#
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.section_level = 0
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_document_title = 0 # len(self.body) or 0
self.in_mailto = False
self.author_in_authors = False # for html4css1
self.math_header = []
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)
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)
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')
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>')
return addr.replace('.', '<span>.</span>')
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
def stylesheet_call(self, path, adjust_path=None):
"""Return code to reference or embed stylesheet file `path`"""
if adjust_path is None:
adjust_path = bool(self.settings.stylesheet_path)
if self.settings.embed_stylesheet:
try:
with open(path, encoding='utf-8') as f:
content = f.read()
except OSError as err:
msg = f'Cannot embed stylesheet: {err}'
self.document.reporter.error(msg)
return '<--- %s --->\n' % msg
else:
self.settings.record_dependencies.add(path)
return self.embedded_stylesheet % content
# else link to style file:
if adjust_path:
# rewrite path relative to output (cf. config.html#stylesheet-path)
path = utils.relative_path(self.settings._destination, path)
return self.stylesheet_link % self.encode(path)
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 = {}
for (name, value) in attributes.items():
atts[name.lower()] = value
classes = atts.pop('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]
# filter classes that are processed by the writer:
internal = ('colwidths-auto', 'colwidths-given', 'colwidths-grid')
if isinstance(node, nodes.table):
classes = [cls for cls in classes if cls not in internal]
if classes:
atts['class'] = ' '.join(classes)
assert 'id' not in atts
ids = node.get('ids', [])
ids.extend(atts.pop('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.Sequential,
nodes.docinfo,
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 = sorted(atts.items())
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
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)
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_)
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)
def depart_Text(self, node):
pass
def visit_abbreviation(self, node):
# @@@ implementation incomplete ("title" attribute)
self.body.append(self.starttag(node, 'abbr', ''))
def depart_abbreviation(self, node):
self.body.append('</abbr>')
def visit_acronym(self, node):
# @@@ implementation incomplete ("title" attribute)
self.body.append(self.starttag(node, 'acronym', ''))
def depart_acronym(self, node):
self.body.append('</acronym>')
def visit_address(self, node):
self.visit_docinfo_item(node, 'address', meta=False)
self.body.append(self.starttag(node, 'pre',
suffix='', CLASS='address'))
def depart_address(self, node):
self.body.append('\n</pre>\n')
self.depart_docinfo_item()
def visit_admonition(self, node):
self.body.append(self.starttag(node, 'aside', classes=['admonition']))
def depart_admonition(self, node=None):
self.body.append('</aside>\n')
attribution_formats = {'dash': ('\u2014', ''),
'parentheses': ('(', ')'),
'parens': ('(', ')'),
'none': ('', '')}
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'))
def depart_attribution(self, node):
self.body.append(self.context.pop() + '</p>\n')
def visit_author(self, node):
if not isinstance(node.parent, nodes.authors):
self.visit_docinfo_item(node, 'author')
self.body.append('<p>')
def depart_author(self, node):
self.body.append('</p>')
if isinstance(node.parent, nodes.authors):
self.body.append('\n')
else:
self.depart_docinfo_item()
def visit_authors(self, node):
self.visit_docinfo_item(node, 'authors')
def depart_authors(self, node):
self.depart_docinfo_item()
def visit_block_quote(self, node):
self.body.append(self.starttag(node, 'blockquote'))
def depart_block_quote(self, node):
self.body.append('</blockquote>\n')
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).
def is_compactable(self, node):
# explicit 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):
return False
if (isinstance(node, (nodes.enumerated_list, nodes.bullet_list))
and not self.settings.compact_lists):
return False
# Table of Contents:
if 'contents' in node.parent['classes']:
return True
# check the list items:
return self.check_simple_list(node)
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))
def depart_bullet_list(self, node):
self.compact_simple, self.compact_p = self.context.pop()
self.body.append('</ul>\n')
def visit_caption(self, node):
self.body.append(self.starttag(node, 'p', '', CLASS='caption'))
def depart_caption(self, node):
self.body.append('</p>\n')
# Use semantic tag and DPub role (HTML4 uses a table)
def visit_citation(self, node):
# role 'doc-bibloentry' requires wrapping in an element with
# role 'list' and an element with role 'doc-bibliography'
# https://www.w3.org/TR/dpub-aria-1.0/#doc-biblioentry)
if not isinstance(node.previous_sibling(), type(node)):
self.body.append('<div role="list" class="citation-list">\n')
self.body.append(self.starttag(node, 'div', classes=[node.tagname],
role="doc-biblioentry"))
def depart_citation(self, node):
self.body.append('</div>\n')
if not isinstance(node.next_node(descend=False, siblings=True),
type(node)):
self.body.append('</div>\n')
# Use DPub role (overwritten in HTML4)
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', suffix='[', href=href,
classes=['citation-reference'],
role='doc-biblioref'))
def depart_citation_reference(self, node):
self.body.append(']</a>')
# classifier
# ----------
# don't insert classifier-delimiter here (done by CSS)
def visit_classifier(self, node):
self.body.append(self.starttag(node, 'span', '', CLASS='classifier'))
def depart_classifier(self, node):
self.body.append('</span>')
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'))
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-grid' not in self.settings.table_style
and 'colwidths-given' not in node.parent.parent['classes']):
return
self.body.append(self.starttag(node, 'colgroup'))
total_width = sum(node['colwidth'] for node in self.colspecs)
for node in self.colspecs:
colwidth = node['colwidth'] / total_width
self.body.append(self.emptytag(node, 'col',
style=f'width: {colwidth:.1%}'))
self.body.append('</colgroup>\n')
def visit_comment(self, node,
sub=re.compile('-(?=-)').sub):
"""Escape double-dashes in comment text."""
self.body.append('<!-- %s -->\n' % sub('- ', node.astext()))
# Content already processed:
raise nodes.SkipNode
def visit_compound(self, node):
self.body.append(self.starttag(node, 'div', CLASS='compound'))
def depart_compound(self, node):
self.body.append('</div>\n')
def visit_container(self, node):
self.body.append(self.starttag(node, 'div',
CLASS='docutils container'))
def depart_container(self, node):
self.body.append('</div>\n')
def visit_contact(self, node):
self.visit_docinfo_item(node, 'contact', meta=False)
def depart_contact(self, node):
self.depart_docinfo_item()
def visit_copyright(self, node):
self.visit_docinfo_item(node, 'copyright')
def depart_copyright(self, node):
self.depart_docinfo_item()
def visit_date(self, node):
self.visit_docinfo_item(node, 'date')
def depart_date(self, node):
self.depart_docinfo_item()
def visit_decoration(self, node):
pass
def depart_decoration(self, node):
pass
def visit_definition(self, node):
if 'details' in node.parent.parent['classes']:
self.body.append('</summary>\n')
else:
self.body.append('</dt>\n')
self.body.append(self.starttag(node, 'dd', ''))
def depart_definition(self, node):
if 'details' not in node.parent.parent['classes']:
self.body.append('</dd>\n')
def visit_definition_list(self, node):
if 'details' in node['classes']:
self.body.append(self.starttag(node, 'div'))
else:
classes = ['simple'] if self.is_compactable(node) else []
self.body.append(self.starttag(node, 'dl', classes=classes))
def depart_definition_list(self, node):
if 'details' in node['classes']:
self.body.append('</div>\n')
else:
self.body.append('</dl>\n')
# Use a "details" disclosure element if parent has "class" arg "details".
def visit_definition_list_item(self, node):
if 'details' in node.parent['classes']:
atts = {}
if "open" in node.parent['classes']:
atts['open'] = 'open'
self.body.append(self.starttag(node, 'details', **atts))
def depart_definition_list_item(self, node):
if 'details' in node.parent['classes']:
self.body.append('</details>\n')
def visit_description(self, node):
self.body.append(self.starttag(node, 'dd', ''))
def depart_description(self, node):
self.body.append('</dd>\n')
def visit_docinfo(self, node):
self.context.append(len(self.body))
classes = ['docinfo']
if self.is_compactable(node):
classes.append('simple')
self.body.append(self.starttag(node, 'dl', classes=classes))
def depart_docinfo(self, node):
self.body.append('</dl>\n')
start = self.context.pop()
self.docinfo = self.body[start:]
self.body = []
def visit_docinfo_item(self, node, name, meta=True):
if meta:
self.meta.append(f'<meta name="{name}" '
f'content="{self.attval(node.astext())}" />\n')
self.body.append(f'<dt class="{name}">{self.language.labels[name]}'
'<span class="colon">:</span></dt>\n')
self.body.append(self.starttag(node, 'dd', '', CLASS=name))
def depart_docinfo_item(self):
self.body.append('</dd>\n')
def visit_doctest_block(self, node):
self.body.append(self.starttag(node, 'pre', suffix='',
classes=['code', 'python', 'doctest']))
def depart_doctest_block(self, node):
self.body.append('\n</pre>\n')
def visit_document(self, node):
title = (node.get('title') or os.path.basename(node['source'])
or 'untitled Docutils document')
self.head.append(f'<title>{self.encode(title)}</title>\n')
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.head = self.meta[:] + self.head
if 'name="dcterms.' in ''.join(self.meta):
self.head.append('<link rel="schema.dcterms"'
' href="http://purl.org/dc/terms/"/>')
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, **self.documenttag_args))
self.body_suffix.insert(0, f'</{self.documenttag_args["tagname"]}>\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, f'len(context) = {len(self.context)}'
def visit_emphasis(self, node):
self.body.append(self.starttag(node, 'em', ''))
def depart_emphasis(self, node):
self.body.append('</em>')
def visit_entry(self, node):
atts = {'classes': []}
if isinstance(node.parent.parent, nodes.thead):
atts['classes'].append('head')
if node.parent.parent.parent.stubs[node.parent.column]:
# "stubs" list is an attribute of the tgroup element
atts['classes'].append('stub')
if atts['classes']:
tagname = 'th'
else:
tagname = 'td'
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())
def depart_entry(self, node):
self.body.append(self.context.pop())
def visit_enumerated_list(self, node):
atts = {'classes': []}
if 'start' in node:
atts['start'] = node['start']
if 'enumtype' in node:
atts['classes'].append(node['enumtype'])
if self.is_compactable(node):
atts['classes'].append('simple')
self.body.append(self.starttag(node, 'ol', **atts))
def depart_enumerated_list(self, node):
self.body.append('</ol>\n')
def visit_field_list(self, node):
atts = {}
classes = node.setdefault('classes', [])
for i, cls in enumerate(classes):
if cls.startswith('field-indent-'):
try:
indent_length = length_or_percentage_or_unitless(
cls[13:], 'px')
except ValueError:
break
atts['style'] = '--field-indent: %s;' % indent_length
classes.pop(i)
break
classes.append('field-list')
if self.is_compactable(node):
classes.append('simple')
self.body.append(self.starttag(node, 'dl', **atts))
def depart_field_list(self, node):
self.body.append('</dl>\n')
def visit_field(self, node):
pass
def depart_field(self, node):
pass
# as field is ignored, pass class arguments to field-name and field-body:
def visit_field_name(self, node):
self.body.append(self.starttag(node, 'dt', '',
classes=node.parent['classes']))
def depart_field_name(self, node):
self.body.append('<span class="colon">:</span></dt>\n')
def visit_field_body(self, node):
self.body.append(self.starttag(node, 'dd', '',
classes=node.parent['classes']))
# prevent misalignment of following content if the field is empty:
if not node.children:
self.body.append('<p></p>')
def depart_field_body(self, node):
self.body.append('</dd>\n')
def visit_figure(self, node):
atts = {'class': 'figure'}
if node.get('width'):
atts['style'] = 'width: %s' % node['width']
if node.get('align'):
atts['class'] += " align-" + node['align']
self.body.append(self.starttag(node, 'div', **atts))
def depart_figure(self, node):
self.body.append('</div>\n')
def visit_footer(self, node):
self.context.append(len(self.body))
def depart_footer(self, node):
start = self.context.pop()
footer = [self.starttag(node, 'div', CLASS='footer'),
'<hr class="footer" />\n']
footer.extend(self.body[start:])
footer.append('\n</div>\n')
self.footer.extend(footer)
self.body_suffix[:0] = footer
del self.body[start:]
def visit_footnote(self, node):
# No native HTML element: use <aside> with ARIA role
# (html4css1 uses tables).
# Wrap groups of footnotes for easier styling.
label_style = self.settings.footnote_references # brackets/superscript
if not isinstance(node.previous_sibling(), type(node)):
self.body.append(f'<aside class="footnote-list {label_style}">\n')
self.body.append(self.starttag(node, 'aside',
classes=[node.tagname, label_style],
role="doc-footnote"))
def depart_footnote(self, node):
self.body.append('</aside>\n')
if not isinstance(node.next_node(descend=False, siblings=True),
type(node)):
self.body.append('</aside>\n')
def visit_footnote_reference(self, node):
href = '#' + node['refid']
classes = ['footnote-reference', self.settings.footnote_references]
self.body.append(self.starttag(node, 'a', suffix='', classes=classes,
role='doc-noteref', href=href))
self.body.append('<span class="fn-bracket">[</span>')
def depart_footnote_reference(self, node):
self.body.append('<span class="fn-bracket">]</span>')
self.body.append('</a>')
# Docutils-generated text: put section numbers in a span for CSS styling:
def visit_generated(self, node):
if 'sectnum' in node['classes']:
# get section number (strip trailing no-break-spaces)
sectnum = node.astext().rstrip(' ')
self.body.append('<span class="sectnum">%s </span>'
% self.encode(sectnum))
# Content already processed:
raise nodes.SkipNode
def depart_generated(self, node):
pass
def visit_header(self, node):
self.context.append(len(self.body))
def depart_header(self, node):
start = self.context.pop()
header = [self.starttag(node, 'div', CLASS='header')]
header.extend(self.body[start:])
header.append('\n<hr class="header"/>\n</div>\n')
self.body_prefix.extend(header)
self.header.extend(header)
del self.body[start:]
def visit_image(self, node):
atts = {}
uri = node['uri']
mimetype = mimetypes.guess_type(uri)[0]
# 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 ('width' not in node or 'height' not in node)
and self.settings.file_insertion_enabled):
imagepath = url2pathname(uri)
try:
with PIL.Image.open(imagepath) as img:
imgsize = img.size
except (OSError, UnicodeEncodeError):
pass # TODO: warn?
else:
self.settings.record_dependencies.add(
imagepath.replace('\\', '/'))
if 'width' not in atts:
atts['width'] = '%dpx' % imgsize[0]
if 'height' not in atts:
atts['height'] = '%dpx' % imgsize[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']
# Embed image file (embedded SVG or data URI):
if self.image_loading == 'embed':
try:
with open(url2pathname(uri), 'rb') as imagefile:
imagedata = imagefile.read()
except OSError as err:
self.document.reporter.error('Cannot embed image %r: %s'
% (uri, err.strerror))
else:
self.settings.record_dependencies.add(unquote_url(uri))
# TODO: insert SVG as-is?
# if mimetype == 'image/svg+xml':
# read/parse, apply arguments,
# insert as <svg ....> ... </svg> # (about 1/3 less data)
data64 = base64.b64encode(imagedata).decode()
uri = 'data:%s;base64,%s' % (mimetype, data64)
elif self.image_loading == 'lazy':
atts['loading'] = 'lazy'
if mimetype == 'application/x-shockwave-flash':
atts['type'] = mimetype
# do NOT use an empty tag: incorrect rendering in browsers
tag = (self.starttag(node, 'object', '', data=uri, **atts)
+ node.get('alt', uri) + '</object>' + suffix)
else:
atts['alt'] = node.get('alt', node['uri'])
tag = self.emptytag(node, 'img', suffix, src=uri, **atts)
self.body.append(tag)
def depart_image(self, node):
pass
def visit_inline(self, node):
self.body.append(self.starttag(node, 'span', ''))
def depart_inline(self, node):
self.body.append('</span>')
# footnote and citation labels:
def visit_label(self, node):
self.body.append('<span class="label">')
self.body.append('<span class="fn-bracket">[</span>')
# footnote/citation backrefs:
if self.settings.footnote_backlinks:
backrefs = node.parent.get('backrefs', [])
if len(backrefs) == 1:
self.body.append('<a role="doc-backlink"'
' href="#%s">' % backrefs[0])
def depart_label(self, node):
backrefs = []
if self.settings.footnote_backlinks:
backrefs = node.parent.get('backrefs', backrefs)
if len(backrefs) == 1:
self.body.append('</a>')
self.body.append('<span class="fn-bracket">]</span></span>\n')
if len(backrefs) > 1:
backlinks = ['<a role="doc-backlink" href="#%s">%s</a>' % (ref, i)
for (i, ref) in enumerate(backrefs, 1)]
self.body.append('<span class="backrefs">(%s)</span>\n'
% ','.join(backlinks))
def visit_legend(self, node):
self.body.append(self.starttag(node, 'div', CLASS='legend'))
def depart_legend(self, node):
self.body.append('</div>\n')
def visit_line(self, node):
self.body.append(self.starttag(node, 'div', suffix='', CLASS='line'))
if not len(node):
self.body.append('<br />')
def depart_line(self, node):
self.body.append('</div>\n')
def visit_line_block(self, node):
self.body.append(self.starttag(node, 'div', CLASS='line-block'))
def depart_line_block(self, node):
self.body.append('</div>\n')
def visit_list_item(self, node):
self.body.append(self.starttag(node, 'li', ''))
def depart_list_item(self, node):
self.body.append('</li>\n')
# inline literal
def visit_literal(self, node):
# special case: "code" role
classes = node['classes']
if 'code' in classes:
# filter 'code' from class arguments
classes.pop(classes.index('code'))
self.body.append(self.starttag(node, 'code', ''))
return
self.body.append(
self.starttag(node, 'span', '', CLASS='docutils literal'))
text = node.astext()
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>')
raise nodes.SkipNode # content already processed
def depart_literal(self, node):
# skipped unless literal element is from "code" role:
self.body.append('</code>')
def visit_literal_block(self, node):
self.body.append(self.starttag(node, 'pre', '', CLASS='literal-block'))
if 'code' in node['classes']:
self.body.append('<code>')
def depart_literal_block(self, node):
if 'code' in node['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)
'html': ('div', 'span', 'formula'),
'latex': ('pre', 'tt', 'math'),
'mathml': ('div', '', ''),
'mathjax': ('div', 'span', 'math'),
}
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(
f'math-output format "{self.math_output}" not supported '
'falling back to "latex"')
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)
'html': ('$%s$', '\\begin{%s}\n%s\n\\end{%s}'),
'latex': (None, None),
'mathml': ('$%s$', '\\begin{%s}\n%s\n\\end{%s}'),
'mathjax': (r'\(%s\)', '\\begin{%s}\n%s\n\\end{%s}'),
}
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),
adjust_path=True)
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 converter == 'pandoc':
math_code = tex2mathml_extern.pandoc(
math_code,
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
def depart_math(self, node):
pass # never reached
def visit_math_block(self, node):
math_env = pick_math_environment(node.astext())
self.visit_math(node, math_env=math_env)
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
def visit_meta(self, node):
self.meta.append(self.emptytag(node, 'meta',
**node.non_default_attributes()))
def depart_meta(self, node):
pass
def visit_option(self, node):
self.body.append(self.starttag(node, 'span', '', CLASS='option'))
def depart_option(self, node):
self.body.append('</span>')
if isinstance(node.next_node(descend=False, siblings=True),
nodes.option):
self.body.append(', ')
def visit_option_argument(self, node):
self.body.append(node.get('delimiter', ' '))
self.body.append(self.starttag(node, 'var', ''))
def depart_option_argument(self, node):
self.body.append('</var>')
def visit_option_group(self, node):
self.body.append(self.starttag(node, 'dt', ''))
self.body.append('<kbd>')
def depart_option_group(self, node):
self.body.append('</kbd></dt>\n')
def visit_option_list(self, node):
self.body.append(
self.starttag(node, 'dl', CLASS='option-list'))
def depart_option_list(self, node):
self.body.append('</dl>\n')
def visit_option_list_item(self, node):
pass
def depart_option_list_item(self, node):
pass
def visit_option_string(self, node):
pass
def depart_option_string(self, node):
pass
def visit_organization(self, node):
self.visit_docinfo_item(node, 'organization')
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?
def visit_paragraph(self, node):
self.body.append(self.starttag(node, 'p', ''))
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')
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'))
def depart_problematic(self, node):
self.body.append('</span>')
self.body.append(self.context.pop())
def visit_raw(self, node):
if 'html' in node.get('format', '').split():
if isinstance(node.parent, nodes.TextElement):
tagname = 'span'
else:
tagname = 'div'
if node['classes']:
self.body.append(self.starttag(node, tagname, suffix=''))
self.body.append(node.astext())
if node['classes']:
self.body.append('</%s>' % tagname)
# Keep non-HTML raw text out of output:
raise nodes.SkipNode
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 len(node) == 1 and isinstance(node[0], nodes.image):
atts['class'] += ' image-reference'
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))
def depart_reference(self, node):
self.body.append('</a>')
if not isinstance(node.parent, nodes.TextElement):
self.body.append('\n')
self.in_mailto = False
def visit_revision(self, node):
self.visit_docinfo_item(node, 'revision', meta=False)
def depart_revision(self, node):
self.depart_docinfo_item()
def visit_row(self, node):
self.body.append(self.starttag(node, 'tr', ''))
node.column = 0
def depart_row(self, node):
self.body.append('</tr>\n')
def visit_rubric(self, node):
self.body.append(self.starttag(node, 'p', '', CLASS='rubric'))
def depart_rubric(self, node):
self.body.append('</p>\n')
def visit_section(self, node):
self.section_level += 1
self.body.append(
self.starttag(node, 'div', CLASS='section'))
def depart_section(self, node):
self.section_level -= 1
self.body.append('</div>\n')
# TODO: use the new HTML5 element <aside>
def visit_sidebar(self, node):
self.body.append(
self.starttag(node, 'div', CLASS='sidebar'))
self.in_sidebar = True
def depart_sidebar(self, node):
self.body.append('</div>\n')
self.in_sidebar = False
def visit_status(self, node):
self.visit_docinfo_item(node, 'status', meta=False)
def depart_status(self, node):
self.depart_docinfo_item()
def visit_strong(self, node):
self.body.append(self.starttag(node, 'strong', ''))
def depart_strong(self, node):
self.body.append('</strong>')
def visit_subscript(self, node):
self.body.append(self.starttag(node, 'sub', ''))
def depart_subscript(self, node):
self.body.append('</sub>')
def visit_substitution_definition(self, node):
"""Internal only."""
raise nodes.SkipNode
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/html51/sections.html#headings-and-sections
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) + 1
elif isinstance(node.parent, nodes.section):
classes = ['section-subtitle']
self.body.append(self.starttag(node, 'p', '', classes=classes))
def depart_subtitle(self, node):
self.body.append('</p>\n')
if isinstance(node.parent, nodes.document):
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[:]
def visit_superscript(self, node):
self.body.append(self.starttag(node, 'sup', ''))
def depart_superscript(self, node):
self.body.append('</sup>')
def visit_system_message(self, node):
self.body.append(self.starttag(node, 'aside', 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))
def depart_system_message(self, node):
self.body.append('</aside>\n')
def visit_table(self, node):
atts = {'classes': self.settings.table_style.replace(',', ' ').split()}
if 'align' in node:
atts['classes'].append('align-%s' % node['align'])
if 'width' in node:
atts['style'] = 'width: %s;' % node['width']
tag = self.starttag(node, 'table', **atts)
self.body.append(tag)
def depart_table(self, node):
self.body.append('</table>\n')
def visit_target(self, node):
if ('refuri' not in node
and 'refid' not in node
and 'refname' not in node):
self.body.append(self.starttag(node, 'span', '', CLASS='target'))
self.context.append('</span>')
else:
self.context.append('')
def depart_target(self, node):
self.body.append(self.context.pop())
# no hard-coded vertical alignment in table body
def visit_tbody(self, node):
self.body.append(self.starttag(node, 'tbody'))
def depart_tbody(self, node):
self.body.append('</tbody>\n')
def visit_term(self, node):
if 'details' in node.parent.parent['classes']:
self.body.append(self.starttag(node, 'summary', suffix=''))
else:
# The parent node (definition_list_item) is omitted in HTML.
self.body.append(self.starttag(node, 'dt', suffix='',
classes=node.parent['classes'],
ids=node.parent['ids']))
def depart_term(self, node):
# Leave the end tag to `self.visit_definition()`,
# in case there's a classifier.
pass
def visit_tgroup(self, node):
self.colspecs = []
node.stubs = []
def depart_tgroup(self, node):
pass
def visit_thead(self, node):
self.body.append(self.starttag(node, 'thead'))
def depart_thead(self, node):
self.body.append('</thead>\n')
def section_title_tags(self, node):
atts = {}
h_level = self.section_level + self.initial_header_level - 1
# Only 6 heading levels have dedicated HTML tags.
tagname = 'h%i' % min(h_level, 6)
if h_level > 6:
atts['aria-level'] = h_level
start_tag = self.starttag(node, tagname, '', **atts)
if node.hasattr('refid'):
atts = {}
atts['class'] = 'toc-backref'
atts['role'] = 'doc-backlink' # HTML5 only
atts['href'] = '#' + node['refid']
start_tag += self.starttag(nodes.reference(), 'a', '', **atts)
close_tag = '</a></%s>\n' % tagname
else:
close_tag = '</%s>\n' % tagname
return start_tag, close_tag
def visit_title(self, node):
close_tag = '</p>\n'
if isinstance(node.parent, nodes.topic):
# TODO: use role="heading" or <h1>? (HTML5 only)
self.body.append(
self.starttag(node, 'p', '', CLASS='topic-title'))
elif isinstance(node.parent, nodes.sidebar):
# TODO: use role="heading" or <h1>? (HTML5 only)
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)
# Get correct heading and evt. backlink tags
start_tag, close_tag = self.section_title_tags(node)
self.body.append(start_tag)
self.context.append(close_tag)
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[:]
def visit_title_reference(self, node):
self.body.append(self.starttag(node, 'cite', ''))
def depart_title_reference(self, node):
self.body.append('</cite>')
def visit_topic(self, node):
self.body.append(self.starttag(node, 'div', CLASS='topic'))
def depart_topic(self, node):
self.body.append('</div>\n')
def visit_transition(self, node):
self.body.append(self.emptytag(node, 'hr', CLASS='docutils'))
def depart_transition(self, node):
pass
def visit_version(self, node):
self.visit_docinfo_item(node, 'version', meta=False)
def depart_version(self, node):
self.depart_docinfo_item()
def unimplemented_visit(self, node):
raise NotImplementedError('visiting unimplemented node type: %s'
% node.__class__.__name__)
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.
"""
def default_visit(self, node):
raise nodes.NodeFound
def visit_list_item(self, node):
children = [child for child in node.children
if not isinstance(child, nodes.Invisible)]
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()
if len(children) <= 1:
return
else:
raise nodes.NodeFound
def pass_node(self, node):
pass
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
Zerion Mini Shell 1.0