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# $Id: states.py 9037 2022-03-05 23:31:10Z milde $
# Author: David Goodger <goodger@python.org>
# Copyright: This module has been placed in the public domain.
"""
This is the ``docutils.parsers.rst.states`` module, the core of
the reStructuredText parser. It defines the following:
:Classes:
- `RSTStateMachine`: reStructuredText parser's entry point.
- `NestedStateMachine`: recursive StateMachine.
- `RSTState`: reStructuredText State superclass.
- `Inliner`: For parsing inline markup.
- `Body`: Generic classifier of the first line of a block.
- `SpecializedBody`: Superclass for compound element members.
- `BulletList`: Second and subsequent bullet_list list_items
- `DefinitionList`: Second+ definition_list_items.
- `EnumeratedList`: Second+ enumerated_list list_items.
- `FieldList`: Second+ fields.
- `OptionList`: Second+ option_list_items.
- `RFC2822List`: Second+ RFC2822-style fields.
- `ExtensionOptions`: Parses directive option fields.
- `Explicit`: Second+ explicit markup constructs.
- `SubstitutionDef`: For embedded directives in substitution definitions.
- `Text`: Classifier of second line of a text block.
- `SpecializedText`: Superclass for continuation lines of Text-variants.
- `Definition`: Second line of potential definition_list_item.
- `Line`: Second line of overlined section title or transition marker.
- `Struct`: An auxiliary collection class.
:Exception classes:
- `MarkupError`
- `ParserError`
- `MarkupMismatch`
:Functions:
- `escape2null()`: Return a string, escape-backslashes converted to nulls.
- `unescape()`: Return a string, nulls removed or restored to backslashes.
:Attributes:
- `state_classes`: set of State classes used with `RSTStateMachine`.
Parser Overview
===============
The reStructuredText parser is implemented as a recursive state machine,
examining its input one line at a time. To understand how the parser works,
please first become familiar with the `docutils.statemachine` module. In the
description below, references are made to classes defined in this module;
please see the individual classes for details.
Parsing proceeds as follows:
1. The state machine examines each line of input, checking each of the
transition patterns of the state `Body`, in order, looking for a match.
The implicit transitions (blank lines and indentation) are checked before
any others. The 'text' transition is a catch-all (matches anything).
2. The method associated with the matched transition pattern is called.
A. Some transition methods are self-contained, appending elements to the
document tree (`Body.doctest` parses a doctest block). The parser's
current line index is advanced to the end of the element, and parsing
continues with step 1.
B. Other transition methods trigger the creation of a nested state machine,
whose job is to parse a compound construct ('indent' does a block quote,
'bullet' does a bullet list, 'overline' does a section [first checking
for a valid section header], etc.).
- In the case of lists and explicit markup, a one-off state machine is
created and run to parse contents of the first item.
- A new state machine is created and its initial state is set to the
appropriate specialized state (`BulletList` in the case of the
'bullet' transition; see `SpecializedBody` for more detail). This
state machine is run to parse the compound element (or series of
explicit markup elements), and returns as soon as a non-member element
is encountered. For example, the `BulletList` state machine ends as
soon as it encounters an element which is not a list item of that
bullet list. The optional omission of inter-element blank lines is
enabled by this nested state machine.
- The current line index is advanced to the end of the elements parsed,
and parsing continues with step 1.
C. The result of the 'text' transition depends on the next line of text.
The current state is changed to `Text`, under which the second line is
examined. If the second line is:
- Indented: The element is a definition list item, and parsing proceeds
similarly to step 2.B, using the `DefinitionList` state.
- A line of uniform punctuation characters: The element is a section
header; again, parsing proceeds as in step 2.B, and `Body` is still
used.
- Anything else: The element is a paragraph, which is examined for
inline markup and appended to the parent element. Processing
continues with step 1.
"""
__docformat__ = 'reStructuredText'
import re
from types import FunctionType, MethodType
from docutils import nodes, statemachine, utils
from docutils import ApplicationError, DataError
from docutils.statemachine import StateMachineWS, StateWS
from docutils.nodes import fully_normalize_name as normalize_name
from docutils.nodes import unescape, whitespace_normalize_name
import docutils.parsers.rst
from docutils.parsers.rst import directives, languages, tableparser, roles
from docutils.utils import escape2null, column_width
from docutils.utils import punctuation_chars, roman, urischemes
from docutils.utils import split_escaped_whitespace
class MarkupError(DataError): pass
class UnknownInterpretedRoleError(DataError): pass
class InterpretedRoleNotImplementedError(DataError): pass
class ParserError(ApplicationError): pass
class MarkupMismatch(Exception): pass
class Struct:
"""Stores data attributes for dotted-attribute access."""
def __init__(self, **keywordargs):
self.__dict__.update(keywordargs)
class RSTStateMachine(StateMachineWS):
"""
reStructuredText's master StateMachine.
The entry point to reStructuredText parsing is the `run()` method.
"""
def run(self, input_lines, document, input_offset=0, match_titles=True,
inliner=None):
"""
Parse `input_lines` and modify the `document` node in place.
Extend `StateMachineWS.run()`: set up parse-global data and
run the StateMachine.
"""
self.language = languages.get_language(
document.settings.language_code, document.reporter)
self.match_titles = match_titles
if inliner is None:
inliner = Inliner()
inliner.init_customizations(document.settings)
self.memo = Struct(document=document,
reporter=document.reporter,
language=self.language,
title_styles=[],
section_level=0,
section_bubble_up_kludge=False,
inliner=inliner)
self.document = document
self.attach_observer(document.note_source)
self.reporter = self.memo.reporter
self.node = document
results = StateMachineWS.run(self, input_lines, input_offset,
input_source=document['source'])
assert results == [], 'RSTStateMachine.run() results should be empty!'
self.node = self.memo = None # remove unneeded references
class NestedStateMachine(StateMachineWS):
"""
StateMachine run from within other StateMachine runs, to parse nested
document structures.
"""
def run(self, input_lines, input_offset, memo, node, match_titles=True):
"""
Parse `input_lines` and populate a `docutils.nodes.document` instance.
Extend `StateMachineWS.run()`: set up document-wide data.
"""
self.match_titles = match_titles
self.memo = memo
self.document = memo.document
self.attach_observer(self.document.note_source)
self.reporter = memo.reporter
self.language = memo.language
self.node = node
results = StateMachineWS.run(self, input_lines, input_offset)
assert results == [], ('NestedStateMachine.run() results should be '
'empty!')
return results
class RSTState(StateWS):
"""
reStructuredText State superclass.
Contains methods used by all State subclasses.
"""
nested_sm = NestedStateMachine
nested_sm_cache = []
def __init__(self, state_machine, debug=False):
self.nested_sm_kwargs = {'state_classes': state_classes,
'initial_state': 'Body'}
StateWS.__init__(self, state_machine, debug)
def runtime_init(self):
StateWS.runtime_init(self)
memo = self.state_machine.memo
self.memo = memo
self.reporter = memo.reporter
self.inliner = memo.inliner
self.document = memo.document
self.parent = self.state_machine.node
# enable the reporter to determine source and source-line
if not hasattr(self.reporter, 'get_source_and_line'):
self.reporter.get_source_and_line = self.state_machine.get_source_and_line # noqa:E501
def goto_line(self, abs_line_offset):
"""
Jump to input line `abs_line_offset`, ignoring jumps past the end.
"""
try:
self.state_machine.goto_line(abs_line_offset)
except EOFError:
pass
def no_match(self, context, transitions):
"""
Override `StateWS.no_match` to generate a system message.
This code should never be run.
"""
self.reporter.severe(
'Internal error: no transition pattern match. State: "%s"; '
'transitions: %s; context: %s; current line: %r.'
% (self.__class__.__name__, transitions, context,
self.state_machine.line))
return context, None, []
def bof(self, context):
"""Called at beginning of file."""
return [], []
def nested_parse(self, block, input_offset, node, match_titles=False,
state_machine_class=None, state_machine_kwargs=None):
"""
Create a new StateMachine rooted at `node` and run it over the input
`block`.
"""
use_default = 0
if state_machine_class is None:
state_machine_class = self.nested_sm
use_default += 1
if state_machine_kwargs is None:
state_machine_kwargs = self.nested_sm_kwargs
use_default += 1
block_length = len(block)
state_machine = None
if use_default == 2:
try:
state_machine = self.nested_sm_cache.pop()
except IndexError:
pass
if not state_machine:
state_machine = state_machine_class(debug=self.debug,
**state_machine_kwargs)
state_machine.run(block, input_offset, memo=self.memo,
node=node, match_titles=match_titles)
if use_default == 2:
self.nested_sm_cache.append(state_machine)
else:
state_machine.unlink()
new_offset = state_machine.abs_line_offset()
# No `block.parent` implies disconnected -- lines aren't in sync:
if block.parent and (len(block) - block_length) != 0:
# Adjustment for block if modified in nested parse:
self.state_machine.next_line(len(block) - block_length)
return new_offset
def nested_list_parse(self, block, input_offset, node, initial_state,
blank_finish,
blank_finish_state=None,
extra_settings={},
match_titles=False,
state_machine_class=None,
state_machine_kwargs=None):
"""
Create a new StateMachine rooted at `node` and run it over the input
`block`. Also keep track of optional intermediate blank lines and the
required final one.
"""
if state_machine_class is None:
state_machine_class = self.nested_sm
if state_machine_kwargs is None:
state_machine_kwargs = self.nested_sm_kwargs.copy()
state_machine_kwargs['initial_state'] = initial_state
state_machine = state_machine_class(debug=self.debug,
**state_machine_kwargs)
if blank_finish_state is None:
blank_finish_state = initial_state
state_machine.states[blank_finish_state].blank_finish = blank_finish
for key, value in extra_settings.items():
setattr(state_machine.states[initial_state], key, value)
state_machine.run(block, input_offset, memo=self.memo,
node=node, match_titles=match_titles)
blank_finish = state_machine.states[blank_finish_state].blank_finish
state_machine.unlink()
return state_machine.abs_line_offset(), blank_finish
def section(self, title, source, style, lineno, messages):
"""Check for a valid subsection and create one if it checks out."""
if self.check_subsection(source, style, lineno):
self.new_subsection(title, lineno, messages)
def check_subsection(self, source, style, lineno):
"""
Check for a valid subsection header. Return True or False.
When a new section is reached that isn't a subsection of the current
section, back up the line count (use ``previous_line(-x)``), then
``raise EOFError``. The current StateMachine will finish, then the
calling StateMachine can re-examine the title. This will work its way
back up the calling chain until the correct section level isreached.
@@@ Alternative: Evaluate the title, store the title info & level, and
back up the chain until that level is reached. Store in memo? Or
return in results?
:Exception: `EOFError` when a sibling or supersection encountered.
"""
memo = self.memo
title_styles = memo.title_styles
mylevel = memo.section_level
try: # check for existing title style
level = title_styles.index(style) + 1
except ValueError: # new title style
if len(title_styles) == memo.section_level: # new subsection
title_styles.append(style)
return True
else: # not at lowest level
self.parent += self.title_inconsistent(source, lineno)
return False
if level <= mylevel: # sibling or supersection
memo.section_level = level # bubble up to parent section
if len(style) == 2:
memo.section_bubble_up_kludge = True
# back up 2 lines for underline title, 3 for overline title
self.state_machine.previous_line(len(style) + 1)
raise EOFError # let parent section re-evaluate
if level == mylevel + 1: # immediate subsection
return True
else: # invalid subsection
self.parent += self.title_inconsistent(source, lineno)
return False
def title_inconsistent(self, sourcetext, lineno):
error = self.reporter.severe(
'Title level inconsistent:', nodes.literal_block('', sourcetext),
line=lineno)
return error
def new_subsection(self, title, lineno, messages):
"""Append new subsection to document tree. On return, check level."""
memo = self.memo
mylevel = memo.section_level
memo.section_level += 1
section_node = nodes.section()
self.parent += section_node
textnodes, title_messages = self.inline_text(title, lineno)
titlenode = nodes.title(title, '', *textnodes)
name = normalize_name(titlenode.astext())
section_node['names'].append(name)
section_node += titlenode
section_node += messages
section_node += title_messages
self.document.note_implicit_target(section_node, section_node)
offset = self.state_machine.line_offset + 1
absoffset = self.state_machine.abs_line_offset() + 1
newabsoffset = self.nested_parse(
self.state_machine.input_lines[offset:], input_offset=absoffset,
node=section_node, match_titles=True)
self.goto_line(newabsoffset)
if memo.section_level <= mylevel: # can't handle next section?
raise EOFError # bubble up to supersection
# reset section_level; next pass will detect it properly
memo.section_level = mylevel
def paragraph(self, lines, lineno):
"""
Return a list (paragraph & messages) & a boolean: literal_block next?
"""
data = '\n'.join(lines).rstrip()
if re.search(r'(?<!\\)(\\\\)*::$', data):
if len(data) == 2:
return [], 1
elif data[-3] in ' \n':
text = data[:-3].rstrip()
else:
text = data[:-1]
literalnext = 1
else:
text = data
literalnext = 0
textnodes, messages = self.inline_text(text, lineno)
p = nodes.paragraph(data, '', *textnodes)
p.source, p.line = self.state_machine.get_source_and_line(lineno)
return [p] + messages, literalnext
def inline_text(self, text, lineno):
"""
Return 2 lists: nodes (text and inline elements), and system_messages.
"""
nodes, messages = self.inliner.parse(text, lineno,
self.memo, self.parent)
return nodes, messages
def unindent_warning(self, node_name):
# the actual problem is one line below the current line
lineno = self.state_machine.abs_line_number() + 1
return self.reporter.warning('%s ends without a blank line; '
'unexpected unindent.' % node_name,
line=lineno)
def build_regexp(definition, compile=True):
"""
Build, compile and return a regular expression based on `definition`.
:Parameter: `definition`: a 4-tuple (group name, prefix, suffix, parts),
where "parts" is a list of regular expressions and/or regular
expression definitions to be joined into an or-group.
"""
name, prefix, suffix, parts = definition
part_strings = []
for part in parts:
if isinstance(part, tuple):
part_strings.append(build_regexp(part, None))
else:
part_strings.append(part)
or_group = '|'.join(part_strings)
regexp = '%(prefix)s(?P<%(name)s>%(or_group)s)%(suffix)s' % locals()
if compile:
return re.compile(regexp)
else:
return regexp
class Inliner:
"""
Parse inline markup; call the `parse()` method.
"""
def __init__(self):
self.implicit_dispatch = []
"""List of (pattern, bound method) tuples, used by
`self.implicit_inline`."""
def init_customizations(self, settings):
# lookahead and look-behind expressions for inline markup rules
if getattr(settings, 'character_level_inline_markup', False):
start_string_prefix = '(^|(?<!\x00))'
end_string_suffix = ''
else:
start_string_prefix = ('(^|(?<=\\s|[%s%s]))' %
(punctuation_chars.openers,
punctuation_chars.delimiters))
end_string_suffix = ('($|(?=\\s|[\x00%s%s%s]))' %
(punctuation_chars.closing_delimiters,
punctuation_chars.delimiters,
punctuation_chars.closers))
args = locals().copy()
args.update(vars(self.__class__))
parts = ('initial_inline', start_string_prefix, '',
[
('start', '', self.non_whitespace_after, # simple start-strings
[r'\*\*', # strong
r'\*(?!\*)', # emphasis but not strong
r'``', # literal
r'_`', # inline internal target
r'\|(?!\|)'] # substitution reference
),
('whole', '', end_string_suffix, # whole constructs
[ # reference name & end-string
r'(?P<refname>%s)(?P<refend>__?)' % self.simplename,
('footnotelabel', r'\[', r'(?P<fnend>\]_)',
[r'[0-9]+', # manually numbered
r'\#(%s)?' % self.simplename, # auto-numbered (w/ label?)
r'\*', # auto-symbol
r'(?P<citationlabel>%s)' % self.simplename, # citation ref
]
)
]
),
('backquote', # interpreted text or phrase reference
'(?P<role>(:%s:)?)' % self.simplename, # optional role
self.non_whitespace_after,
['`(?!`)'] # but not literal
)
]
)
self.start_string_prefix = start_string_prefix
self.end_string_suffix = end_string_suffix
self.parts = parts
self.patterns = Struct(
initial=build_regexp(parts),
emphasis=re.compile(self.non_whitespace_escape_before
+ r'(\*)' + end_string_suffix),
strong=re.compile(self.non_whitespace_escape_before
+ r'(\*\*)' + end_string_suffix),
interpreted_or_phrase_ref=re.compile(
r"""
%(non_unescaped_whitespace_escape_before)s
(
`
(?P<suffix>
(?P<role>:%(simplename)s:)?
(?P<refend>__?)?
)
)
%(end_string_suffix)s
""" % args, re.VERBOSE),
embedded_link=re.compile(
r"""
(
(?:[ \n]+|^) # spaces or beginning of line/string
< # open bracket
%(non_whitespace_after)s
(([^<>]|\x00[<>])+) # anything but unescaped angle brackets
%(non_whitespace_escape_before)s
> # close bracket
)
$ # end of string
""" % args, re.VERBOSE),
literal=re.compile(self.non_whitespace_before + '(``)'
+ end_string_suffix),
target=re.compile(self.non_whitespace_escape_before
+ r'(`)' + end_string_suffix),
substitution_ref=re.compile(self.non_whitespace_escape_before
+ r'(\|_{0,2})'
+ end_string_suffix),
email=re.compile(self.email_pattern % args + '$',
re.VERBOSE),
uri=re.compile(
(r"""
%(start_string_prefix)s
(?P<whole>
(?P<absolute> # absolute URI
(?P<scheme> # scheme (http, ftp, mailto)
[a-zA-Z][a-zA-Z0-9.+-]*
)
:
(
( # either:
(//?)? # hierarchical URI
%(uric)s* # URI characters
%(uri_end)s # final URI char
)
( # optional query
\?%(uric)s*
%(uri_end)s
)?
( # optional fragment
\#%(uric)s*
%(uri_end)s
)?
)
)
| # *OR*
(?P<email> # email address
""" + self.email_pattern + r"""
)
)
%(end_string_suffix)s
""") % args, re.VERBOSE),
pep=re.compile(
r"""
%(start_string_prefix)s
(
(pep-(?P<pepnum1>\d+)(.txt)?) # reference to source file
|
(PEP\s+(?P<pepnum2>\d+)) # reference by name
)
%(end_string_suffix)s""" % args, re.VERBOSE),
rfc=re.compile(
r"""
%(start_string_prefix)s
(RFC(-|\s+)?(?P<rfcnum>\d+))
%(end_string_suffix)s""" % args, re.VERBOSE))
self.implicit_dispatch.append((self.patterns.uri,
self.standalone_uri))
if settings.pep_references:
self.implicit_dispatch.append((self.patterns.pep,
self.pep_reference))
if settings.rfc_references:
self.implicit_dispatch.append((self.patterns.rfc,
self.rfc_reference))
def parse(self, text, lineno, memo, parent):
# Needs to be refactored for nested inline markup.
# Add nested_parse() method?
"""
Return 2 lists: nodes (text and inline elements), and system_messages.
Using `self.patterns.initial`, a pattern which matches start-strings
(emphasis, strong, interpreted, phrase reference, literal,
substitution reference, and inline target) and complete constructs
(simple reference, footnote reference), search for a candidate. When
one is found, check for validity (e.g., not a quoted '*' character).
If valid, search for the corresponding end string if applicable, and
check it for validity. If not found or invalid, generate a warning
and ignore the start-string. Implicit inline markup (e.g. standalone
URIs) is found last.
:text: source string
:lineno: absolute line number (cf. statemachine.get_source_and_line())
"""
self.reporter = memo.reporter
self.document = memo.document
self.language = memo.language
self.parent = parent
pattern_search = self.patterns.initial.search
dispatch = self.dispatch
remaining = escape2null(text)
processed = []
unprocessed = []
messages = []
while remaining:
match = pattern_search(remaining)
if match:
groups = match.groupdict()
method = dispatch[groups['start'] or groups['backquote']
or groups['refend'] or groups['fnend']]
before, inlines, remaining, sysmessages = method(self, match,
lineno)
unprocessed.append(before)
messages += sysmessages
if inlines:
processed += self.implicit_inline(''.join(unprocessed),
lineno)
processed += inlines
unprocessed = []
else:
break
remaining = ''.join(unprocessed) + remaining
if remaining:
processed += self.implicit_inline(remaining, lineno)
return processed, messages
# Inline object recognition
# -------------------------
# See also init_customizations().
non_whitespace_before = r'(?<!\s)'
non_whitespace_escape_before = r'(?<![\s\x00])'
non_unescaped_whitespace_escape_before = r'(?<!(?<!\x00)[\s\x00])'
non_whitespace_after = r'(?!\s)'
# Alphanumerics with isolated internal [-._+:] chars (i.e. not 2 together):
simplename = r'(?:(?!_)\w)+(?:[-._+:](?:(?!_)\w)+)*'
# Valid URI characters (see RFC 2396 & RFC 2732);
# final \x00 allows backslash escapes in URIs:
uric = r"""[-_.!~*'()[\];/:@&=+$,%a-zA-Z0-9\x00]"""
# Delimiter indicating the end of a URI (not part of the URI):
uri_end_delim = r"""[>]"""
# Last URI character; same as uric but no punctuation:
urilast = r"""[_~*/=+a-zA-Z0-9]"""
# End of a URI (either 'urilast' or 'uric followed by a
# uri_end_delim'):
uri_end = r"""(?:%(urilast)s|%(uric)s(?=%(uri_end_delim)s))""" % locals()
emailc = r"""[-_!~*'{|}/#?^`&=+$%a-zA-Z0-9\x00]"""
email_pattern = r"""
%(emailc)s+(?:\.%(emailc)s+)* # name
(?<!\x00)@ # at
%(emailc)s+(?:\.%(emailc)s*)* # host
%(uri_end)s # final URI char
"""
def quoted_start(self, match):
"""Test if inline markup start-string is 'quoted'.
'Quoted' in this context means the start-string is enclosed in a pair
of matching opening/closing delimiters (not necessarily quotes)
or at the end of the match.
"""
string = match.string
start = match.start()
if start == 0: # start-string at beginning of text
return False
prestart = string[start - 1]
try:
poststart = string[match.end()]
except IndexError: # start-string at end of text
return True # not "quoted" but no markup start-string either
return punctuation_chars.match_chars(prestart, poststart)
def inline_obj(self, match, lineno, end_pattern, nodeclass,
restore_backslashes=False):
string = match.string
matchstart = match.start('start')
matchend = match.end('start')
if self.quoted_start(match):
return string[:matchend], [], string[matchend:], [], ''
endmatch = end_pattern.search(string[matchend:])
if endmatch and endmatch.start(1): # 1 or more chars
text = endmatch.string[:endmatch.start(1)]
if restore_backslashes:
text = unescape(text, True)
textend = matchend + endmatch.end(1)
rawsource = unescape(string[matchstart:textend], True)
node = nodeclass(rawsource, text)
return (string[:matchstart], [node],
string[textend:], [], endmatch.group(1))
msg = self.reporter.warning(
'Inline %s start-string without end-string.'
% nodeclass.__name__, line=lineno)
text = unescape(string[matchstart:matchend], True)
prb = self.problematic(text, text, msg)
return string[:matchstart], [prb], string[matchend:], [msg], ''
def problematic(self, text, rawsource, message):
msgid = self.document.set_id(message, self.parent)
problematic = nodes.problematic(rawsource, text, refid=msgid)
prbid = self.document.set_id(problematic)
message.add_backref(prbid)
return problematic
def emphasis(self, match, lineno):
before, inlines, remaining, sysmessages, endstring = self.inline_obj(
match, lineno, self.patterns.emphasis, nodes.emphasis)
return before, inlines, remaining, sysmessages
def strong(self, match, lineno):
before, inlines, remaining, sysmessages, endstring = self.inline_obj(
match, lineno, self.patterns.strong, nodes.strong)
return before, inlines, remaining, sysmessages
def interpreted_or_phrase_ref(self, match, lineno):
end_pattern = self.patterns.interpreted_or_phrase_ref
string = match.string
matchstart = match.start('backquote')
matchend = match.end('backquote')
rolestart = match.start('role')
role = match.group('role')
position = ''
if role:
role = role[1:-1]
position = 'prefix'
elif self.quoted_start(match):
return string[:matchend], [], string[matchend:], []
endmatch = end_pattern.search(string[matchend:])
if endmatch and endmatch.start(1): # 1 or more chars
textend = matchend + endmatch.end()
if endmatch.group('role'):
if role:
msg = self.reporter.warning(
'Multiple roles in interpreted text (both '
'prefix and suffix present; only one allowed).',
line=lineno)
text = unescape(string[rolestart:textend], True)
prb = self.problematic(text, text, msg)
return string[:rolestart], [prb], string[textend:], [msg]
role = endmatch.group('suffix')[1:-1]
position = 'suffix'
escaped = endmatch.string[:endmatch.start(1)]
rawsource = unescape(string[matchstart:textend], True)
if rawsource[-1:] == '_':
if role:
msg = self.reporter.warning(
'Mismatch: both interpreted text role %s and '
'reference suffix.' % position, line=lineno)
text = unescape(string[rolestart:textend], True)
prb = self.problematic(text, text, msg)
return string[:rolestart], [prb], string[textend:], [msg]
return self.phrase_ref(string[:matchstart], string[textend:],
rawsource, escaped)
else:
rawsource = unescape(string[rolestart:textend], True)
nodelist, messages = self.interpreted(rawsource, escaped, role,
lineno)
return (string[:rolestart], nodelist,
string[textend:], messages)
msg = self.reporter.warning(
'Inline interpreted text or phrase reference start-string '
'without end-string.', line=lineno)
text = unescape(string[matchstart:matchend], True)
prb = self.problematic(text, text, msg)
return string[:matchstart], [prb], string[matchend:], [msg]
def phrase_ref(self, before, after, rawsource, escaped, text=None):
# `text` is ignored (since 0.16)
match = self.patterns.embedded_link.search(escaped)
if match: # embedded <URI> or <alias_>
text = escaped[:match.start(0)]
unescaped = unescape(text)
rawtext = unescape(text, True)
aliastext = match.group(2)
rawaliastext = unescape(aliastext, True)
underscore_escaped = rawaliastext.endswith(r'\_')
if (aliastext.endswith('_')
and not (underscore_escaped
or self.patterns.uri.match(aliastext))):
aliastype = 'name'
alias = normalize_name(unescape(aliastext[:-1]))
target = nodes.target(match.group(1), refname=alias)
target.indirect_reference_name = whitespace_normalize_name(
unescape(aliastext[:-1]))
else:
aliastype = 'uri'
# remove unescaped whitespace
alias_parts = split_escaped_whitespace(match.group(2))
alias = ' '.join(''.join(part.split())
for part in alias_parts)
alias = self.adjust_uri(unescape(alias))
if alias.endswith(r'\_'):
alias = alias[:-2] + '_'
target = nodes.target(match.group(1), refuri=alias)
target.referenced = 1
if not aliastext:
raise ApplicationError('problem with embedded link: %r'
% aliastext)
if not text:
text = alias
unescaped = unescape(text)
rawtext = rawaliastext
else:
text = escaped
unescaped = unescape(text)
target = None
rawtext = unescape(escaped, True)
refname = normalize_name(unescaped)
reference = nodes.reference(rawsource, text,
name=whitespace_normalize_name(unescaped))
reference[0].rawsource = rawtext
node_list = [reference]
if rawsource[-2:] == '__':
if target and (aliastype == 'name'):
reference['refname'] = alias
self.document.note_refname(reference)
# self.document.note_indirect_target(target) # required?
elif target and (aliastype == 'uri'):
reference['refuri'] = alias
else:
reference['anonymous'] = 1
else:
if target:
target['names'].append(refname)
if aliastype == 'name':
reference['refname'] = alias
self.document.note_indirect_target(target)
self.document.note_refname(reference)
else:
reference['refuri'] = alias
self.document.note_explicit_target(target, self.parent)
# target.note_referenced_by(name=refname)
node_list.append(target)
else:
reference['refname'] = refname
self.document.note_refname(reference)
return before, node_list, after, []
def adjust_uri(self, uri):
match = self.patterns.email.match(uri)
if match:
return 'mailto:' + uri
else:
return uri
def interpreted(self, rawsource, text, role, lineno):
role_fn, messages = roles.role(role, self.language, lineno,
self.reporter)
if role_fn:
nodes, messages2 = role_fn(role, rawsource, text, lineno, self)
return nodes, messages + messages2
else:
msg = self.reporter.error(
'Unknown interpreted text role "%s".' % role,
line=lineno)
return ([self.problematic(rawsource, rawsource, msg)],
messages + [msg])
def literal(self, match, lineno):
before, inlines, remaining, sysmessages, endstring = self.inline_obj(
match, lineno, self.patterns.literal, nodes.literal,
restore_backslashes=True)
return before, inlines, remaining, sysmessages
def inline_internal_target(self, match, lineno):
before, inlines, remaining, sysmessages, endstring = self.inline_obj(
match, lineno, self.patterns.target, nodes.target)
if inlines and isinstance(inlines[0], nodes.target):
assert len(inlines) == 1
target = inlines[0]
name = normalize_name(target.astext())
target['names'].append(name)
self.document.note_explicit_target(target, self.parent)
return before, inlines, remaining, sysmessages
def substitution_reference(self, match, lineno):
before, inlines, remaining, sysmessages, endstring = self.inline_obj(
match, lineno, self.patterns.substitution_ref,
nodes.substitution_reference)
if len(inlines) == 1:
subref_node = inlines[0]
if isinstance(subref_node, nodes.substitution_reference):
subref_text = subref_node.astext()
self.document.note_substitution_ref(subref_node, subref_text)
if endstring[-1:] == '_':
reference_node = nodes.reference(
'|%s%s' % (subref_text, endstring), '')
if endstring[-2:] == '__':
reference_node['anonymous'] = 1
else:
reference_node['refname'] = normalize_name(subref_text)
self.document.note_refname(reference_node)
reference_node += subref_node
inlines = [reference_node]
return before, inlines, remaining, sysmessages
def footnote_reference(self, match, lineno):
"""
Handles `nodes.footnote_reference` and `nodes.citation_reference`
elements.
"""
label = match.group('footnotelabel')
refname = normalize_name(label)
string = match.string
before = string[:match.start('whole')]
remaining = string[match.end('whole'):]
if match.group('citationlabel'):
refnode = nodes.citation_reference('[%s]_' % label,
refname=refname)
refnode += nodes.Text(label)
self.document.note_citation_ref(refnode)
else:
refnode = nodes.footnote_reference('[%s]_' % label)
if refname[0] == '#':
refname = refname[1:]
refnode['auto'] = 1
self.document.note_autofootnote_ref(refnode)
elif refname == '*':
refname = ''
refnode['auto'] = '*'
self.document.note_symbol_footnote_ref(
refnode)
else:
refnode += nodes.Text(label)
if refname:
refnode['refname'] = refname
self.document.note_footnote_ref(refnode)
if utils.get_trim_footnote_ref_space(self.document.settings):
before = before.rstrip()
return before, [refnode], remaining, []
def reference(self, match, lineno, anonymous=False):
referencename = match.group('refname')
refname = normalize_name(referencename)
referencenode = nodes.reference(
referencename + match.group('refend'), referencename,
name=whitespace_normalize_name(referencename))
referencenode[0].rawsource = referencename
if anonymous:
referencenode['anonymous'] = 1
else:
referencenode['refname'] = refname
self.document.note_refname(referencenode)
string = match.string
matchstart = match.start('whole')
matchend = match.end('whole')
return string[:matchstart], [referencenode], string[matchend:], []
def anonymous_reference(self, match, lineno):
return self.reference(match, lineno, anonymous=True)
def standalone_uri(self, match, lineno):
if (not match.group('scheme')
or match.group('scheme').lower() in urischemes.schemes):
if match.group('email'):
addscheme = 'mailto:'
else:
addscheme = ''
text = match.group('whole')
refuri = addscheme + unescape(text)
reference = nodes.reference(unescape(text, True), text,
refuri=refuri)
return [reference]
else: # not a valid scheme
raise MarkupMismatch
def pep_reference(self, match, lineno):
text = match.group(0)
if text.startswith('pep-'):
pepnum = int(unescape(match.group('pepnum1')))
elif text.startswith('PEP'):
pepnum = int(unescape(match.group('pepnum2')))
else:
raise MarkupMismatch
ref = (self.document.settings.pep_base_url
+ self.document.settings.pep_file_url_template % pepnum)
return [nodes.reference(unescape(text, True), text, refuri=ref)]
rfc_url = 'rfc%d.html'
def rfc_reference(self, match, lineno):
text = match.group(0)
if text.startswith('RFC'):
rfcnum = int(unescape(match.group('rfcnum')))
ref = self.document.settings.rfc_base_url + self.rfc_url % rfcnum
else:
raise MarkupMismatch
return [nodes.reference(unescape(text, True), text, refuri=ref)]
def implicit_inline(self, text, lineno):
"""
Check each of the patterns in `self.implicit_dispatch` for a match,
and dispatch to the stored method for the pattern. Recursively check
the text before and after the match. Return a list of `nodes.Text`
and inline element nodes.
"""
if not text:
return []
for pattern, method in self.implicit_dispatch:
match = pattern.search(text)
if match:
try:
# Must recurse on strings before *and* after the match;
# there may be multiple patterns.
return (self.implicit_inline(text[:match.start()], lineno)
+ method(match, lineno)
+ self.implicit_inline(text[match.end():], lineno))
except MarkupMismatch:
pass
return [nodes.Text(text)]
dispatch = {'*': emphasis,
'**': strong,
'`': interpreted_or_phrase_ref,
'``': literal,
'_`': inline_internal_target,
']_': footnote_reference,
'|': substitution_reference,
'_': reference,
'__': anonymous_reference}
def _loweralpha_to_int(s, _zero=(ord('a')-1)):
return ord(s) - _zero
def _upperalpha_to_int(s, _zero=(ord('A')-1)):
return ord(s) - _zero
def _lowerroman_to_int(s):
return roman.fromRoman(s.upper())
class Body(RSTState):
"""
Generic classifier of the first line of a block.
"""
double_width_pad_char = tableparser.TableParser.double_width_pad_char
"""Padding character for East Asian double-width text."""
enum = Struct()
"""Enumerated list parsing information."""
enum.formatinfo = {
'parens': Struct(prefix='(', suffix=')', start=1, end=-1),
'rparen': Struct(prefix='', suffix=')', start=0, end=-1),
'period': Struct(prefix='', suffix='.', start=0, end=-1)}
enum.formats = enum.formatinfo.keys()
enum.sequences = ['arabic', 'loweralpha', 'upperalpha',
'lowerroman', 'upperroman'] # ORDERED!
enum.sequencepats = {'arabic': '[0-9]+',
'loweralpha': '[a-z]',
'upperalpha': '[A-Z]',
'lowerroman': '[ivxlcdm]+',
'upperroman': '[IVXLCDM]+'}
enum.converters = {'arabic': int,
'loweralpha': _loweralpha_to_int,
'upperalpha': _upperalpha_to_int,
'lowerroman': _lowerroman_to_int,
'upperroman': roman.fromRoman}
enum.sequenceregexps = {}
for sequence in enum.sequences:
enum.sequenceregexps[sequence] = re.compile(
enum.sequencepats[sequence] + '$')
grid_table_top_pat = re.compile(r'\+-[-+]+-\+ *$')
"""Matches the top (& bottom) of a full table)."""
simple_table_top_pat = re.compile('=+( +=+)+ *$')
"""Matches the top of a simple table."""
simple_table_border_pat = re.compile('=+[ =]*$')
"""Matches the bottom & header bottom of a simple table."""
pats = {}
"""Fragments of patterns used by transitions."""
pats['nonalphanum7bit'] = '[!-/:-@[-`{-~]'
pats['alpha'] = '[a-zA-Z]'
pats['alphanum'] = '[a-zA-Z0-9]'
pats['alphanumplus'] = '[a-zA-Z0-9_-]'
pats['enum'] = ('(%(arabic)s|%(loweralpha)s|%(upperalpha)s|%(lowerroman)s'
'|%(upperroman)s|#)' % enum.sequencepats)
pats['optname'] = '%(alphanum)s%(alphanumplus)s*' % pats
# @@@ Loosen up the pattern? Allow Unicode?
pats['optarg'] = '(%(alpha)s%(alphanumplus)s*|<[^<>]+>)' % pats
pats['shortopt'] = r'(-|\+)%(alphanum)s( ?%(optarg)s)?' % pats
pats['longopt'] = r'(--|/)%(optname)s([ =]%(optarg)s)?' % pats
pats['option'] = r'(%(shortopt)s|%(longopt)s)' % pats
for format in enum.formats:
pats[format] = '(?P<%s>%s%s%s)' % (
format, re.escape(enum.formatinfo[format].prefix),
pats['enum'], re.escape(enum.formatinfo[format].suffix))
patterns = {
'bullet': '[-+*\u2022\u2023\u2043]( +|$)',
'enumerator': r'(%(parens)s|%(rparen)s|%(period)s)( +|$)' % pats,
'field_marker': r':(?![: ])([^:\\]|\\.|:(?!([ `]|$)))*(?<! ):( +|$)',
'option_marker': r'%(option)s(, %(option)s)*( +| ?$)' % pats,
'doctest': r'>>>( +|$)',
'line_block': r'\|( +|$)',
'grid_table_top': grid_table_top_pat,
'simple_table_top': simple_table_top_pat,
'explicit_markup': r'\.\.( +|$)',
'anonymous': r'__( +|$)',
'line': r'(%(nonalphanum7bit)s)\1* *$' % pats,
'text': r''}
initial_transitions = (
'bullet',
'enumerator',
'field_marker',
'option_marker',
'doctest',
'line_block',
'grid_table_top',
'simple_table_top',
'explicit_markup',
'anonymous',
'line',
'text')
def indent(self, match, context, next_state):
"""Block quote."""
(indented, indent, line_offset, blank_finish
) = self.state_machine.get_indented()
elements = self.block_quote(indented, line_offset)
self.parent += elements
if not blank_finish:
self.parent += self.unindent_warning('Block quote')
return context, next_state, []
def block_quote(self, indented, line_offset):
elements = []
while indented:
blockquote = nodes.block_quote(rawsource='\n'.join(indented))
(blockquote.source, blockquote.line
) = self.state_machine.get_source_and_line(line_offset+1)
(blockquote_lines,
attribution_lines,
attribution_offset,
indented,
new_line_offset) = self.split_attribution(indented, line_offset)
self.nested_parse(blockquote_lines, line_offset, blockquote)
elements.append(blockquote)
if attribution_lines:
attribution, messages = self.parse_attribution(
attribution_lines, line_offset+attribution_offset)
blockquote += attribution
elements += messages
line_offset = new_line_offset
while indented and not indented[0]:
indented = indented[1:]
line_offset += 1
return elements
# U+2014 is an em-dash:
attribution_pattern = re.compile('(---?(?!-)|\u2014) *(?=[^ \\n])')
def split_attribution(self, indented, line_offset):
"""
Check for a block quote attribution and split it off:
* First line after a blank line must begin with a dash ("--", "---",
em-dash; matches `self.attribution_pattern`).
* Every line after that must have consistent indentation.
* Attributions must be preceded by block quote content.
Return a tuple of: (block quote content lines, attribution lines,
attribution offset, remaining indented lines, remaining lines offset).
"""
blank = None
nonblank_seen = False
for i in range(len(indented)):
line = indented[i].rstrip()
if line:
if nonblank_seen and blank == i - 1: # last line blank
match = self.attribution_pattern.match(line)
if match:
attribution_end, indent = self.check_attribution(
indented, i)
if attribution_end:
a_lines = indented[i:attribution_end]
a_lines.trim_left(match.end(), end=1)
a_lines.trim_left(indent, start=1)
return (indented[:i], a_lines,
i, indented[attribution_end:],
line_offset + attribution_end)
nonblank_seen = True
else:
blank = i
else:
return indented, None, None, None, None
def check_attribution(self, indented, attribution_start):
"""
Check attribution shape.
Return the index past the end of the attribution, and the indent.
"""
indent = None
i = attribution_start + 1
for i in range(attribution_start + 1, len(indented)):
line = indented[i].rstrip()
if not line:
break
if indent is None:
indent = len(line) - len(line.lstrip())
elif len(line) - len(line.lstrip()) != indent:
return None, None # bad shape; not an attribution
else:
# return index of line after last attribution line:
i += 1
return i, (indent or 0)
def parse_attribution(self, indented, line_offset):
text = '\n'.join(indented).rstrip()
lineno = 1 + line_offset # line_offset is zero-based
textnodes, messages = self.inline_text(text, lineno)
node = nodes.attribution(text, '', *textnodes)
node.source, node.line = self.state_machine.get_source_and_line(lineno)
return node, messages
def bullet(self, match, context, next_state):
"""Bullet list item."""
bulletlist = nodes.bullet_list()
(bulletlist.source,
bulletlist.line) = self.state_machine.get_source_and_line()
self.parent += bulletlist
bulletlist['bullet'] = match.string[0]
i, blank_finish = self.list_item(match.end())
bulletlist += i
offset = self.state_machine.line_offset + 1 # next line
new_line_offset, blank_finish = self.nested_list_parse(
self.state_machine.input_lines[offset:],
input_offset=self.state_machine.abs_line_offset() + 1,
node=bulletlist, initial_state='BulletList',
blank_finish=blank_finish)
self.goto_line(new_line_offset)
if not blank_finish:
self.parent += self.unindent_warning('Bullet list')
return [], next_state, []
def list_item(self, indent):
if self.state_machine.line[indent:]:
indented, line_offset, blank_finish = (
self.state_machine.get_known_indented(indent))
else:
indented, indent, line_offset, blank_finish = (
self.state_machine.get_first_known_indented(indent))
listitem = nodes.list_item('\n'.join(indented))
if indented:
self.nested_parse(indented, input_offset=line_offset,
node=listitem)
return listitem, blank_finish
def enumerator(self, match, context, next_state):
"""Enumerated List Item"""
format, sequence, text, ordinal = self.parse_enumerator(match)
if not self.is_enumerated_list_item(ordinal, sequence, format):
raise statemachine.TransitionCorrection('text')
enumlist = nodes.enumerated_list()
self.parent += enumlist
if sequence == '#':
enumlist['enumtype'] = 'arabic'
else:
enumlist['enumtype'] = sequence
enumlist['prefix'] = self.enum.formatinfo[format].prefix
enumlist['suffix'] = self.enum.formatinfo[format].suffix
if ordinal != 1:
enumlist['start'] = ordinal
msg = self.reporter.info(
'Enumerated list start value not ordinal-1: "%s" (ordinal %s)'
% (text, ordinal))
self.parent += msg
listitem, blank_finish = self.list_item(match.end())
enumlist += listitem
offset = self.state_machine.line_offset + 1 # next line
newline_offset, blank_finish = self.nested_list_parse(
self.state_machine.input_lines[offset:],
input_offset=self.state_machine.abs_line_offset() + 1,
node=enumlist, initial_state='EnumeratedList',
blank_finish=blank_finish,
extra_settings={'lastordinal': ordinal,
'format': format,
'auto': sequence == '#'})
self.goto_line(newline_offset)
if not blank_finish:
self.parent += self.unindent_warning('Enumerated list')
return [], next_state, []
def parse_enumerator(self, match, expected_sequence=None):
"""
Analyze an enumerator and return the results.
:Return:
- the enumerator format ('period', 'parens', or 'rparen'),
- the sequence used ('arabic', 'loweralpha', 'upperroman', etc.),
- the text of the enumerator, stripped of formatting, and
- the ordinal value of the enumerator ('a' -> 1, 'ii' -> 2, etc.;
``None`` is returned for invalid enumerator text).
The enumerator format has already been determined by the regular
expression match. If `expected_sequence` is given, that sequence is
tried first. If not, we check for Roman numeral 1. This way,
single-character Roman numerals (which are also alphabetical) can be
matched. If no sequence has been matched, all sequences are checked in
order.
"""
groupdict = match.groupdict()
sequence = ''
for format in self.enum.formats:
if groupdict[format]: # was this the format matched?
break # yes; keep `format`
else: # shouldn't happen
raise ParserError('enumerator format not matched')
text = groupdict[format][self.enum.formatinfo[format].start # noqa: E203,E501
: self.enum.formatinfo[format].end]
if text == '#':
sequence = '#'
elif expected_sequence:
try:
if self.enum.sequenceregexps[expected_sequence].match(text):
sequence = expected_sequence
except KeyError: # shouldn't happen
raise ParserError('unknown enumerator sequence: %s'
% sequence)
elif text == 'i':
sequence = 'lowerroman'
elif text == 'I':
sequence = 'upperroman'
if not sequence:
for sequence in self.enum.sequences:
if self.enum.sequenceregexps[sequence].match(text):
break
else: # shouldn't happen
raise ParserError('enumerator sequence not matched')
if sequence == '#':
ordinal = 1
else:
try:
ordinal = self.enum.converters[sequence](text)
except roman.InvalidRomanNumeralError:
ordinal = None
return format, sequence, text, ordinal
def is_enumerated_list_item(self, ordinal, sequence, format):
"""
Check validity based on the ordinal value and the second line.
Return true if the ordinal is valid and the second line is blank,
indented, or starts with the next enumerator or an auto-enumerator.
"""
if ordinal is None:
return None
try:
next_line = self.state_machine.next_line()
except EOFError: # end of input lines
self.state_machine.previous_line()
return 1
else:
self.state_machine.previous_line()
if not next_line[:1].strip(): # blank or indented
return 1
result = self.make_enumerator(ordinal + 1, sequence, format)
if result:
next_enumerator, auto_enumerator = result
try:
if (next_line.startswith(next_enumerator)
or next_line.startswith(auto_enumerator)):
return 1
except TypeError:
pass
return None
def make_enumerator(self, ordinal, sequence, format):
"""
Construct and return the next enumerated list item marker, and an
auto-enumerator ("#" instead of the regular enumerator).
Return ``None`` for invalid (out of range) ordinals.
"""
if sequence == '#':
enumerator = '#'
elif sequence == 'arabic':
enumerator = str(ordinal)
else:
if sequence.endswith('alpha'):
if ordinal > 26:
return None
enumerator = chr(ordinal + ord('a') - 1)
elif sequence.endswith('roman'):
try:
enumerator = roman.toRoman(ordinal)
except roman.RomanError:
return None
else: # shouldn't happen
raise ParserError('unknown enumerator sequence: "%s"'
% sequence)
if sequence.startswith('lower'):
enumerator = enumerator.lower()
elif sequence.startswith('upper'):
enumerator = enumerator.upper()
else: # shouldn't happen
raise ParserError('unknown enumerator sequence: "%s"'
% sequence)
formatinfo = self.enum.formatinfo[format]
next_enumerator = (formatinfo.prefix + enumerator + formatinfo.suffix
+ ' ')
auto_enumerator = formatinfo.prefix + '#' + formatinfo.suffix + ' '
return next_enumerator, auto_enumerator
def field_marker(self, match, context, next_state):
"""Field list item."""
field_list = nodes.field_list()
self.parent += field_list
field, blank_finish = self.field(match)
field_list += field
offset = self.state_machine.line_offset + 1 # next line
newline_offset, blank_finish = self.nested_list_parse(
self.state_machine.input_lines[offset:],
input_offset=self.state_machine.abs_line_offset() + 1,
node=field_list, initial_state='FieldList',
blank_finish=blank_finish)
self.goto_line(newline_offset)
if not blank_finish:
self.parent += self.unindent_warning('Field list')
return [], next_state, []
def field(self, match):
name = self.parse_field_marker(match)
src, srcline = self.state_machine.get_source_and_line()
lineno = self.state_machine.abs_line_number()
(indented, indent, line_offset, blank_finish
) = self.state_machine.get_first_known_indented(match.end())
field_node = nodes.field()
field_node.source = src
field_node.line = srcline
name_nodes, name_messages = self.inline_text(name, lineno)
field_node += nodes.field_name(name, '', *name_nodes)
field_body = nodes.field_body('\n'.join(indented), *name_messages)
field_node += field_body
if indented:
self.parse_field_body(indented, line_offset, field_body)
return field_node, blank_finish
def parse_field_marker(self, match):
"""Extract & return field name from a field marker match."""
field = match.group()[1:] # strip off leading ':'
field = field[:field.rfind(':')] # strip off trailing ':' etc.
return field
def parse_field_body(self, indented, offset, node):
self.nested_parse(indented, input_offset=offset, node=node)
def option_marker(self, match, context, next_state):
"""Option list item."""
optionlist = nodes.option_list()
(optionlist.source, optionlist.line
) = self.state_machine.get_source_and_line()
try:
listitem, blank_finish = self.option_list_item(match)
except MarkupError as error:
# This shouldn't happen; pattern won't match.
msg = self.reporter.error('Invalid option list marker: %s'
% error)
self.parent += msg
(indented, indent, line_offset, blank_finish
) = self.state_machine.get_first_known_indented(match.end())
elements = self.block_quote(indented, line_offset)
self.parent += elements
if not blank_finish:
self.parent += self.unindent_warning('Option list')
return [], next_state, []
self.parent += optionlist
optionlist += listitem
offset = self.state_machine.line_offset + 1 # next line
newline_offset, blank_finish = self.nested_list_parse(
self.state_machine.input_lines[offset:],
input_offset=self.state_machine.abs_line_offset() + 1,
node=optionlist, initial_state='OptionList',
blank_finish=blank_finish)
self.goto_line(newline_offset)
if not blank_finish:
self.parent += self.unindent_warning('Option list')
return [], next_state, []
def option_list_item(self, match):
offset = self.state_machine.abs_line_offset()
options = self.parse_option_marker(match)
(indented, indent, line_offset, blank_finish
) = self.state_machine.get_first_known_indented(match.end())
if not indented: # not an option list item
self.goto_line(offset)
raise statemachine.TransitionCorrection('text')
option_group = nodes.option_group('', *options)
description = nodes.description('\n'.join(indented))
option_list_item = nodes.option_list_item('', option_group,
description)
if indented:
self.nested_parse(indented, input_offset=line_offset,
node=description)
return option_list_item, blank_finish
def parse_option_marker(self, match):
"""
Return a list of `node.option` and `node.option_argument` objects,
parsed from an option marker match.
:Exception: `MarkupError` for invalid option markers.
"""
optlist = []
optionstrings = match.group().rstrip().split(', ')
for optionstring in optionstrings:
tokens = optionstring.split()
delimiter = ' '
firstopt = tokens[0].split('=', 1)
if len(firstopt) > 1:
# "--opt=value" form
tokens[:1] = firstopt
delimiter = '='
elif (len(tokens[0]) > 2
and ((tokens[0].startswith('-')
and not tokens[0].startswith('--'))
or tokens[0].startswith('+'))):
# "-ovalue" form
tokens[:1] = [tokens[0][:2], tokens[0][2:]]
delimiter = ''
if len(tokens) > 1 and (tokens[1].startswith('<')
and tokens[-1].endswith('>')):
# "-o <value1 value2>" form; join all values into one token
tokens[1:] = [' '.join(tokens[1:])]
if 0 < len(tokens) <= 2:
option = nodes.option(optionstring)
option += nodes.option_string(tokens[0], tokens[0])
if len(tokens) > 1:
option += nodes.option_argument(tokens[1], tokens[1],
delimiter=delimiter)
optlist.append(option)
else:
raise MarkupError(
'wrong number of option tokens (=%s), should be 1 or 2: '
'"%s"' % (len(tokens), optionstring))
return optlist
def doctest(self, match, context, next_state):
data = '\n'.join(self.state_machine.get_text_block())
# TODO: prepend class value ['pycon'] (Python Console)
# parse with `directives.body.CodeBlock` (returns literal-block
# with class "code" and syntax highlight markup).
self.parent += nodes.doctest_block(data, data)
return [], next_state, []
def line_block(self, match, context, next_state):
"""First line of a line block."""
block = nodes.line_block()
self.parent += block
lineno = self.state_machine.abs_line_number()
line, messages, blank_finish = self.line_block_line(match, lineno)
block += line
self.parent += messages
if not blank_finish:
offset = self.state_machine.line_offset + 1 # next line
new_line_offset, blank_finish = self.nested_list_parse(
self.state_machine.input_lines[offset:],
input_offset=self.state_machine.abs_line_offset() + 1,
node=block, initial_state='LineBlock',
blank_finish=0)
self.goto_line(new_line_offset)
if not blank_finish:
self.parent += self.reporter.warning(
'Line block ends without a blank line.',
line=lineno+1)
if len(block):
if block[0].indent is None:
block[0].indent = 0
self.nest_line_block_lines(block)
return [], next_state, []
def line_block_line(self, match, lineno):
"""Return one line element of a line_block."""
(indented, indent, line_offset, blank_finish
) = self.state_machine.get_first_known_indented(match.end(),
until_blank=True)
text = '\n'.join(indented)
text_nodes, messages = self.inline_text(text, lineno)
line = nodes.line(text, '', *text_nodes)
if match.string.rstrip() != '|': # not empty
line.indent = len(match.group(1)) - 1
return line, messages, blank_finish
def nest_line_block_lines(self, block):
for index in range(1, len(block)):
if getattr(block[index], 'indent', None) is None:
block[index].indent = block[index - 1].indent
self.nest_line_block_segment(block)
def nest_line_block_segment(self, block):
indents = [item.indent for item in block]
least = min(indents)
new_items = []
new_block = nodes.line_block()
for item in block:
if item.indent > least:
new_block.append(item)
else:
if len(new_block):
self.nest_line_block_segment(new_block)
new_items.append(new_block)
new_block = nodes.line_block()
new_items.append(item)
if len(new_block):
self.nest_line_block_segment(new_block)
new_items.append(new_block)
block[:] = new_items
def grid_table_top(self, match, context, next_state):
"""Top border of a full table."""
return self.table_top(match, context, next_state,
self.isolate_grid_table,
tableparser.GridTableParser)
def simple_table_top(self, match, context, next_state):
"""Top border of a simple table."""
return self.table_top(match, context, next_state,
self.isolate_simple_table,
tableparser.SimpleTableParser)
def table_top(self, match, context, next_state,
isolate_function, parser_class):
"""Top border of a generic table."""
nodelist, blank_finish = self.table(isolate_function, parser_class)
self.parent += nodelist
if not blank_finish:
msg = self.reporter.warning(
'Blank line required after table.',
line=self.state_machine.abs_line_number()+1)
self.parent += msg
return [], next_state, []
def table(self, isolate_function, parser_class):
"""Parse a table."""
block, messages, blank_finish = isolate_function()
if block:
try:
parser = parser_class()
tabledata = parser.parse(block)
tableline = (self.state_machine.abs_line_number() - len(block)
+ 1)
table = self.build_table(tabledata, tableline)
nodelist = [table] + messages
except tableparser.TableMarkupError as err:
nodelist = self.malformed_table(block, ' '.join(err.args),
offset=err.offset) + messages
else:
nodelist = messages
return nodelist, blank_finish
def isolate_grid_table(self):
messages = []
blank_finish = 1
try:
block = self.state_machine.get_text_block(flush_left=True)
except statemachine.UnexpectedIndentationError as err:
block, src, srcline = err.args
messages.append(self.reporter.error('Unexpected indentation.',
source=src, line=srcline))
blank_finish = 0
block.disconnect()
# for East Asian chars:
block.pad_double_width(self.double_width_pad_char)
width = len(block[0].strip())
for i in range(len(block)):
block[i] = block[i].strip()
if block[i][0] not in '+|': # check left edge
blank_finish = 0
self.state_machine.previous_line(len(block) - i)
del block[i:]
break
if not self.grid_table_top_pat.match(block[-1]): # find bottom
blank_finish = 0
# from second-last to third line of table:
for i in range(len(block) - 2, 1, -1):
if self.grid_table_top_pat.match(block[i]):
self.state_machine.previous_line(len(block) - i + 1)
del block[i+1:]
break
else:
messages.extend(self.malformed_table(block))
return [], messages, blank_finish
for i in range(len(block)): # check right edge
if len(block[i]) != width or block[i][-1] not in '+|':
messages.extend(self.malformed_table(block))
return [], messages, blank_finish
return block, messages, blank_finish
def isolate_simple_table(self):
start = self.state_machine.line_offset
lines = self.state_machine.input_lines
limit = len(lines) - 1
toplen = len(lines[start].strip())
pattern_match = self.simple_table_border_pat.match
found = 0
found_at = None
i = start + 1
while i <= limit:
line = lines[i]
match = pattern_match(line)
if match:
if len(line.strip()) != toplen:
self.state_machine.next_line(i - start)
messages = self.malformed_table(
lines[start:i+1], 'Bottom/header table border does '
'not match top border.')
return [], messages, i == limit or not lines[i+1].strip()
found += 1
found_at = i
if found == 2 or i == limit or not lines[i+1].strip():
end = i
break
i += 1
else: # reached end of input_lines
if found:
extra = ' or no blank line after table bottom'
self.state_machine.next_line(found_at - start)
block = lines[start:found_at+1]
else:
extra = ''
self.state_machine.next_line(i - start - 1)
block = lines[start:]
messages = self.malformed_table(
block, 'No bottom table border found%s.' % extra)
return [], messages, not extra
self.state_machine.next_line(end - start)
block = lines[start:end+1]
# for East Asian chars:
block.pad_double_width(self.double_width_pad_char)
return block, [], end == limit or not lines[end+1].strip()
def malformed_table(self, block, detail='', offset=0):
block.replace(self.double_width_pad_char, '')
data = '\n'.join(block)
message = 'Malformed table.'
startline = self.state_machine.abs_line_number() - len(block) + 1
if detail:
message += '\n' + detail
error = self.reporter.error(message, nodes.literal_block(data, data),
line=startline+offset)
return [error]
def build_table(self, tabledata, tableline, stub_columns=0, widths=None):
colwidths, headrows, bodyrows = tabledata
table = nodes.table()
if widths == 'auto':
table['classes'] += ['colwidths-auto']
elif widths: # "grid" or list of integers
table['classes'] += ['colwidths-given']
tgroup = nodes.tgroup(cols=len(colwidths))
table += tgroup
for colwidth in colwidths:
colspec = nodes.colspec(colwidth=colwidth)
if stub_columns:
colspec.attributes['stub'] = 1
stub_columns -= 1
tgroup += colspec
if headrows:
thead = nodes.thead()
tgroup += thead
for row in headrows:
thead += self.build_table_row(row, tableline)
tbody = nodes.tbody()
tgroup += tbody
for row in bodyrows:
tbody += self.build_table_row(row, tableline)
return table
def build_table_row(self, rowdata, tableline):
row = nodes.row()
for cell in rowdata:
if cell is None:
continue
morerows, morecols, offset, cellblock = cell
attributes = {}
if morerows:
attributes['morerows'] = morerows
if morecols:
attributes['morecols'] = morecols
entry = nodes.entry(**attributes)
row += entry
if ''.join(cellblock):
self.nested_parse(cellblock, input_offset=tableline+offset,
node=entry)
return row
explicit = Struct()
"""Patterns and constants used for explicit markup recognition."""
explicit.patterns = Struct(
target=re.compile(r"""
(
_ # anonymous target
| # *OR*
(?!_) # no underscore at the beginning
(?P<quote>`?) # optional open quote
(?![ `]) # first char. not space or
# backquote
(?P<name> # reference name
.+?
)
%(non_whitespace_escape_before)s
(?P=quote) # close quote if open quote used
)
(?<!(?<!\x00):) # no unescaped colon at end
%(non_whitespace_escape_before)s
[ ]? # optional space
: # end of reference name
([ ]+|$) # followed by whitespace
""" % vars(Inliner), re.VERBOSE),
reference=re.compile(r"""
(
(?P<simple>%(simplename)s)_
| # *OR*
` # open backquote
(?![ ]) # not space
(?P<phrase>.+?) # hyperlink phrase
%(non_whitespace_escape_before)s
`_ # close backquote,
# reference mark
)
$ # end of string
""" % vars(Inliner), re.VERBOSE),
substitution=re.compile(r"""
(
(?![ ]) # first char. not space
(?P<name>.+?) # substitution text
%(non_whitespace_escape_before)s
\| # close delimiter
)
([ ]+|$) # followed by whitespace
""" % vars(Inliner),
re.VERBOSE),)
def footnote(self, match):
src, srcline = self.state_machine.get_source_and_line()
(indented, indent, offset, blank_finish
) = self.state_machine.get_first_known_indented(match.end())
label = match.group(1)
name = normalize_name(label)
footnote = nodes.footnote('\n'.join(indented))
footnote.source = src
footnote.line = srcline
if name[0] == '#': # auto-numbered
name = name[1:] # autonumber label
footnote['auto'] = 1
if name:
footnote['names'].append(name)
self.document.note_autofootnote(footnote)
elif name == '*': # auto-symbol
name = ''
footnote['auto'] = '*'
self.document.note_symbol_footnote(footnote)
else: # manually numbered
footnote += nodes.label('', label)
footnote['names'].append(name)
self.document.note_footnote(footnote)
if name:
self.document.note_explicit_target(footnote, footnote)
else:
self.document.set_id(footnote, footnote)
if indented:
self.nested_parse(indented, input_offset=offset, node=footnote)
return [footnote], blank_finish
def citation(self, match):
src, srcline = self.state_machine.get_source_and_line()
(indented, indent, offset, blank_finish
) = self.state_machine.get_first_known_indented(match.end())
label = match.group(1)
name = normalize_name(label)
citation = nodes.citation('\n'.join(indented))
citation.source = src
citation.line = srcline
citation += nodes.label('', label)
citation['names'].append(name)
self.document.note_citation(citation)
self.document.note_explicit_target(citation, citation)
if indented:
self.nested_parse(indented, input_offset=offset, node=citation)
return [citation], blank_finish
def hyperlink_target(self, match):
pattern = self.explicit.patterns.target
lineno = self.state_machine.abs_line_number()
(block, indent, offset, blank_finish
) = self.state_machine.get_first_known_indented(
match.end(), until_blank=True, strip_indent=False)
blocktext = match.string[:match.end()] + '\n'.join(block)
block = [escape2null(line) for line in block]
escaped = block[0]
blockindex = 0
while True:
targetmatch = pattern.match(escaped)
if targetmatch:
break
blockindex += 1
try:
escaped += block[blockindex]
except IndexError:
raise MarkupError('malformed hyperlink target.')
del block[:blockindex]
block[0] = (block[0] + ' ')[targetmatch.end()-len(escaped)-1:].strip()
target = self.make_target(block, blocktext, lineno,
targetmatch.group('name'))
return [target], blank_finish
def make_target(self, block, block_text, lineno, target_name):
target_type, data = self.parse_target(block, block_text, lineno)
if target_type == 'refname':
target = nodes.target(block_text, '', refname=normalize_name(data))
target.indirect_reference_name = data
self.add_target(target_name, '', target, lineno)
self.document.note_indirect_target(target)
return target
elif target_type == 'refuri':
target = nodes.target(block_text, '')
self.add_target(target_name, data, target, lineno)
return target
else:
return data
def parse_target(self, block, block_text, lineno):
"""
Determine the type of reference of a target.
:Return: A 2-tuple, one of:
- 'refname' and the indirect reference name
- 'refuri' and the URI
- 'malformed' and a system_message node
"""
if block and block[-1].strip()[-1:] == '_': # possible indirect target
reference = ' '.join(line.strip() for line in block)
refname = self.is_reference(reference)
if refname:
return 'refname', refname
ref_parts = split_escaped_whitespace(' '.join(block))
reference = ' '.join(''.join(unescape(part).split())
for part in ref_parts)
return 'refuri', reference
def is_reference(self, reference):
match = self.explicit.patterns.reference.match(
whitespace_normalize_name(reference))
if not match:
return None
return unescape(match.group('simple') or match.group('phrase'))
def add_target(self, targetname, refuri, target, lineno):
target.line = lineno
if targetname:
name = normalize_name(unescape(targetname))
target['names'].append(name)
if refuri:
uri = self.inliner.adjust_uri(refuri)
if uri:
target['refuri'] = uri
else:
raise ApplicationError('problem with URI: %r' % refuri)
self.document.note_explicit_target(target, self.parent)
else: # anonymous target
if refuri:
target['refuri'] = refuri
target['anonymous'] = 1
self.document.note_anonymous_target(target)
def substitution_def(self, match):
pattern = self.explicit.patterns.substitution
src, srcline = self.state_machine.get_source_and_line()
(block, indent, offset, blank_finish
) = self.state_machine.get_first_known_indented(match.end(),
strip_indent=False)
blocktext = (match.string[:match.end()] + '\n'.join(block))
block.disconnect()
escaped = escape2null(block[0].rstrip())
blockindex = 0
while True:
subdefmatch = pattern.match(escaped)
if subdefmatch:
break
blockindex += 1
try:
escaped = escaped + ' ' + escape2null(
block[blockindex].strip())
except IndexError:
raise MarkupError('malformed substitution definition.')
del block[:blockindex] # strip out the substitution marker
start = subdefmatch.end()-len(escaped)-1
block[0] = (block[0].strip() + ' ')[start:-1]
if not block[0]:
del block[0]
offset += 1
while block and not block[-1].strip():
block.pop()
subname = subdefmatch.group('name')
substitution_node = nodes.substitution_definition(blocktext)
substitution_node.source = src
substitution_node.line = srcline
if not block:
msg = self.reporter.warning(
'Substitution definition "%s" missing contents.' % subname,
nodes.literal_block(blocktext, blocktext),
source=src, line=srcline)
return [msg], blank_finish
block[0] = block[0].strip()
substitution_node['names'].append(
nodes.whitespace_normalize_name(subname))
new_abs_offset, blank_finish = self.nested_list_parse(
block, input_offset=offset, node=substitution_node,
initial_state='SubstitutionDef', blank_finish=blank_finish)
i = 0
for node in substitution_node[:]:
if not (isinstance(node, nodes.Inline)
or isinstance(node, nodes.Text)):
self.parent += substitution_node[i]
del substitution_node[i]
else:
i += 1
for node in substitution_node.findall(nodes.Element):
if self.disallowed_inside_substitution_definitions(node):
pformat = nodes.literal_block('', node.pformat().rstrip())
msg = self.reporter.error(
'Substitution definition contains illegal element <%s>:'
% node.tagname,
pformat, nodes.literal_block(blocktext, blocktext),
source=src, line=srcline)
return [msg], blank_finish
if len(substitution_node) == 0:
msg = self.reporter.warning(
'Substitution definition "%s" empty or invalid.' % subname,
nodes.literal_block(blocktext, blocktext),
source=src, line=srcline)
return [msg], blank_finish
self.document.note_substitution_def(
substitution_node, subname, self.parent)
return [substitution_node], blank_finish
def disallowed_inside_substitution_definitions(self, node):
if (node['ids']
or isinstance(node, nodes.reference) and node.get('anonymous')
or isinstance(node, nodes.footnote_reference) and node.get('auto')): # noqa: E501
return True
else:
return False
def directive(self, match, **option_presets):
"""Returns a 2-tuple: list of nodes, and a "blank finish" boolean."""
type_name = match.group(1)
directive_class, messages = directives.directive(
type_name, self.memo.language, self.document)
self.parent += messages
if directive_class:
return self.run_directive(
directive_class, match, type_name, option_presets)
else:
return self.unknown_directive(type_name)
def run_directive(self, directive, match, type_name, option_presets):
"""
Parse a directive then run its directive function.
Parameters:
- `directive`: The class implementing the directive. Must be
a subclass of `rst.Directive`.
- `match`: A regular expression match object which matched the first
line of the directive.
- `type_name`: The directive name, as used in the source text.
- `option_presets`: A dictionary of preset options, defaults for the
directive options. Currently, only an "alt" option is passed by
substitution definitions (value: the substitution name), which may
be used by an embedded image directive.
Returns a 2-tuple: list of nodes, and a "blank finish" boolean.
"""
if isinstance(directive, (FunctionType, MethodType)):
from docutils.parsers.rst import convert_directive_function
directive = convert_directive_function(directive)
lineno = self.state_machine.abs_line_number()
initial_line_offset = self.state_machine.line_offset
(indented, indent, line_offset, blank_finish
) = self.state_machine.get_first_known_indented(match.end(),
strip_top=0)
block_text = '\n'.join(self.state_machine.input_lines[
initial_line_offset : self.state_machine.line_offset + 1]) # noqa: E203,E501
try:
arguments, options, content, content_offset = (
self.parse_directive_block(indented, line_offset,
directive, option_presets))
except MarkupError as detail:
error = self.reporter.error(
'Error in "%s" directive:\n%s.' % (type_name,
' '.join(detail.args)),
nodes.literal_block(block_text, block_text), line=lineno)
return [error], blank_finish
directive_instance = directive(
type_name, arguments, options, content, lineno,
content_offset, block_text, self, self.state_machine)
try:
result = directive_instance.run()
except docutils.parsers.rst.DirectiveError as error:
msg_node = self.reporter.system_message(error.level, error.msg,
line=lineno)
msg_node += nodes.literal_block(block_text, block_text)
result = [msg_node]
assert isinstance(result, list), \
'Directive "%s" must return a list of nodes.' % type_name
for i in range(len(result)):
assert isinstance(result[i], nodes.Node), \
('Directive "%s" returned non-Node object (index %s): %r'
% (type_name, i, result[i]))
return (result,
blank_finish or self.state_machine.is_next_line_blank())
def parse_directive_block(self, indented, line_offset, directive,
option_presets):
option_spec = directive.option_spec
has_content = directive.has_content
if indented and not indented[0].strip():
indented.trim_start()
line_offset += 1
while indented and not indented[-1].strip():
indented.trim_end()
if indented and (directive.required_arguments
or directive.optional_arguments
or option_spec):
for i, line in enumerate(indented):
if not line.strip():
break
else:
i += 1
arg_block = indented[:i]
content = indented[i+1:]
content_offset = line_offset + i + 1
else:
content = indented
content_offset = line_offset
arg_block = []
if option_spec:
options, arg_block = self.parse_directive_options(
option_presets, option_spec, arg_block)
else:
options = {}
if arg_block and not (directive.required_arguments
or directive.optional_arguments):
content = arg_block + indented[i:]
content_offset = line_offset
arg_block = []
while content and not content[0].strip():
content.trim_start()
content_offset += 1
if directive.required_arguments or directive.optional_arguments:
arguments = self.parse_directive_arguments(
directive, arg_block)
else:
arguments = []
if content and not has_content:
raise MarkupError('no content permitted')
return arguments, options, content, content_offset
def parse_directive_options(self, option_presets, option_spec, arg_block):
options = option_presets.copy()
for i, line in enumerate(arg_block):
if re.match(Body.patterns['field_marker'], line):
opt_block = arg_block[i:]
arg_block = arg_block[:i]
break
else:
opt_block = []
if opt_block:
success, data = self.parse_extension_options(option_spec,
opt_block)
if success: # data is a dict of options
options.update(data)
else: # data is an error string
raise MarkupError(data)
return options, arg_block
def parse_directive_arguments(self, directive, arg_block):
required = directive.required_arguments
optional = directive.optional_arguments
arg_text = '\n'.join(arg_block)
arguments = arg_text.split()
if len(arguments) < required:
raise MarkupError('%s argument(s) required, %s supplied'
% (required, len(arguments)))
elif len(arguments) > required + optional:
if directive.final_argument_whitespace:
arguments = arg_text.split(None, required + optional - 1)
else:
raise MarkupError(
'maximum %s argument(s) allowed, %s supplied'
% (required + optional, len(arguments)))
return arguments
def parse_extension_options(self, option_spec, datalines):
"""
Parse `datalines` for a field list containing extension options
matching `option_spec`.
:Parameters:
- `option_spec`: a mapping of option name to conversion
function, which should raise an exception on bad input.
- `datalines`: a list of input strings.
:Return:
- Success value, 1 or 0.
- An option dictionary on success, an error string on failure.
"""
node = nodes.field_list()
newline_offset, blank_finish = self.nested_list_parse(
datalines, 0, node, initial_state='ExtensionOptions',
blank_finish=True)
if newline_offset != len(datalines): # incomplete parse of block
return 0, 'invalid option block'
try:
options = utils.extract_extension_options(node, option_spec)
except KeyError as detail:
return 0, 'unknown option: "%s"' % detail.args[0]
except (ValueError, TypeError) as detail:
return 0, 'invalid option value: %s' % ' '.join(detail.args)
except utils.ExtensionOptionError as detail:
return 0, 'invalid option data: %s' % ' '.join(detail.args)
if blank_finish:
return 1, options
else:
return 0, 'option data incompletely parsed'
def unknown_directive(self, type_name):
lineno = self.state_machine.abs_line_number()
(indented, indent, offset, blank_finish
) = self.state_machine.get_first_known_indented(0, strip_indent=False)
text = '\n'.join(indented)
error = self.reporter.error('Unknown directive type "%s".' % type_name,
nodes.literal_block(text, text),
line=lineno)
return [error], blank_finish
def comment(self, match):
if self.state_machine.is_next_line_blank():
first_comment_line = match.string[match.end():]
if not first_comment_line.strip(): # empty comment
return [nodes.comment()], True # "A tiny but practical wart."
if first_comment_line.startswith('end of inclusion from "'):
# cf. parsers.rst.directives.misc.Include
self.document.include_log.pop()
return [], True
(indented, indent, offset, blank_finish
) = self.state_machine.get_first_known_indented(match.end())
while indented and not indented[-1].strip():
indented.trim_end()
text = '\n'.join(indented)
return [nodes.comment(text, text)], blank_finish
explicit.constructs = [
(footnote,
re.compile(r"""
\.\.[ ]+ # explicit markup start
\[
( # footnote label:
[0-9]+ # manually numbered footnote
| # *OR*
\# # anonymous auto-numbered footnote
| # *OR*
\#%s # auto-number ed?) footnote label
| # *OR*
\* # auto-symbol footnote
)
\]
([ ]+|$) # whitespace or end of line
""" % Inliner.simplename, re.VERBOSE)),
(citation,
re.compile(r"""
\.\.[ ]+ # explicit markup start
\[(%s)\] # citation label
([ ]+|$) # whitespace or end of line
""" % Inliner.simplename, re.VERBOSE)),
(hyperlink_target,
re.compile(r"""
\.\.[ ]+ # explicit markup start
_ # target indicator
(?![ ]|$) # first char. not space or EOL
""", re.VERBOSE)),
(substitution_def,
re.compile(r"""
\.\.[ ]+ # explicit markup start
\| # substitution indicator
(?![ ]|$) # first char. not space or EOL
""", re.VERBOSE)),
(directive,
re.compile(r"""
\.\.[ ]+ # explicit markup start
(%s) # directive name
[ ]? # optional space
:: # directive delimiter
([ ]+|$) # whitespace or end of line
""" % Inliner.simplename, re.VERBOSE))]
def explicit_markup(self, match, context, next_state):
"""Footnotes, hyperlink targets, directives, comments."""
nodelist, blank_finish = self.explicit_construct(match)
self.parent += nodelist
self.explicit_list(blank_finish)
return [], next_state, []
def explicit_construct(self, match):
"""Determine which explicit construct this is, parse & return it."""
errors = []
for method, pattern in self.explicit.constructs:
expmatch = pattern.match(match.string)
if expmatch:
try:
return method(self, expmatch)
except MarkupError as error:
lineno = self.state_machine.abs_line_number()
message = ' '.join(error.args)
errors.append(self.reporter.warning(message, line=lineno))
break
nodelist, blank_finish = self.comment(match)
return nodelist + errors, blank_finish
def explicit_list(self, blank_finish):
"""
Create a nested state machine for a series of explicit markup
constructs (including anonymous hyperlink targets).
"""
offset = self.state_machine.line_offset + 1 # next line
newline_offset, blank_finish = self.nested_list_parse(
self.state_machine.input_lines[offset:],
input_offset=self.state_machine.abs_line_offset() + 1,
node=self.parent, initial_state='Explicit',
blank_finish=blank_finish,
match_titles=self.state_machine.match_titles)
self.goto_line(newline_offset)
if not blank_finish:
self.parent += self.unindent_warning('Explicit markup')
def anonymous(self, match, context, next_state):
"""Anonymous hyperlink targets."""
nodelist, blank_finish = self.anonymous_target(match)
self.parent += nodelist
self.explicit_list(blank_finish)
return [], next_state, []
def anonymous_target(self, match):
lineno = self.state_machine.abs_line_number()
(block, indent, offset, blank_finish
) = self.state_machine.get_first_known_indented(match.end(),
until_blank=True)
blocktext = match.string[:match.end()] + '\n'.join(block)
block = [escape2null(line) for line in block]
target = self.make_target(block, blocktext, lineno, '')
return [target], blank_finish
def line(self, match, context, next_state):
"""Section title overline or transition marker."""
if self.state_machine.match_titles:
return [match.string], 'Line', []
elif match.string.strip() == '::':
raise statemachine.TransitionCorrection('text')
elif len(match.string.strip()) < 4:
msg = self.reporter.info(
'Unexpected possible title overline or transition.\n'
"Treating it as ordinary text because it's so short.",
line=self.state_machine.abs_line_number())
self.parent += msg
raise statemachine.TransitionCorrection('text')
else:
blocktext = self.state_machine.line
msg = self.reporter.severe(
'Unexpected section title or transition.',
nodes.literal_block(blocktext, blocktext),
line=self.state_machine.abs_line_number())
self.parent += msg
return [], next_state, []
def text(self, match, context, next_state):
"""Titles, definition lists, paragraphs."""
return [match.string], 'Text', []
class RFC2822Body(Body):
"""
RFC2822 headers are only valid as the first constructs in documents. As
soon as anything else appears, the `Body` state should take over.
"""
patterns = Body.patterns.copy() # can't modify the original
patterns['rfc2822'] = r'[!-9;-~]+:( +|$)'
initial_transitions = [(name, 'Body')
for name in Body.initial_transitions]
initial_transitions.insert(-1, ('rfc2822', 'Body')) # just before 'text'
def rfc2822(self, match, context, next_state):
"""RFC2822-style field list item."""
fieldlist = nodes.field_list(classes=['rfc2822'])
self.parent += fieldlist
field, blank_finish = self.rfc2822_field(match)
fieldlist += field
offset = self.state_machine.line_offset + 1 # next line
newline_offset, blank_finish = self.nested_list_parse(
self.state_machine.input_lines[offset:],
input_offset=self.state_machine.abs_line_offset() + 1,
node=fieldlist, initial_state='RFC2822List',
blank_finish=blank_finish)
self.goto_line(newline_offset)
if not blank_finish:
self.parent += self.unindent_warning(
'RFC2822-style field list')
return [], next_state, []
def rfc2822_field(self, match):
name = match.string[:match.string.find(':')]
(indented, indent, line_offset, blank_finish
) = self.state_machine.get_first_known_indented(match.end(),
until_blank=True)
fieldnode = nodes.field()
fieldnode += nodes.field_name(name, name)
fieldbody = nodes.field_body('\n'.join(indented))
fieldnode += fieldbody
if indented:
self.nested_parse(indented, input_offset=line_offset,
node=fieldbody)
return fieldnode, blank_finish
class SpecializedBody(Body):
"""
Superclass for second and subsequent compound element members. Compound
elements are lists and list-like constructs.
All transition methods are disabled (redefined as `invalid_input`).
Override individual methods in subclasses to re-enable.
For example, once an initial bullet list item, say, is recognized, the
`BulletList` subclass takes over, with a "bullet_list" node as its
container. Upon encountering the initial bullet list item, `Body.bullet`
calls its ``self.nested_list_parse`` (`RSTState.nested_list_parse`), which
starts up a nested parsing session with `BulletList` as the initial state.
Only the ``bullet`` transition method is enabled in `BulletList`; as long
as only bullet list items are encountered, they are parsed and inserted
into the container. The first construct which is *not* a bullet list item
triggers the `invalid_input` method, which ends the nested parse and
closes the container. `BulletList` needs to recognize input that is
invalid in the context of a bullet list, which means everything *other
than* bullet list items, so it inherits the transition list created in
`Body`.
"""
def invalid_input(self, match=None, context=None, next_state=None):
"""Not a compound element member. Abort this state machine."""
self.state_machine.previous_line() # back up so parent SM can reassess
raise EOFError
indent = invalid_input
bullet = invalid_input
enumerator = invalid_input
field_marker = invalid_input
option_marker = invalid_input
doctest = invalid_input
line_block = invalid_input
grid_table_top = invalid_input
simple_table_top = invalid_input
explicit_markup = invalid_input
anonymous = invalid_input
line = invalid_input
text = invalid_input
class BulletList(SpecializedBody):
"""Second and subsequent bullet_list list_items."""
def bullet(self, match, context, next_state):
"""Bullet list item."""
if match.string[0] != self.parent['bullet']:
# different bullet: new list
self.invalid_input()
listitem, blank_finish = self.list_item(match.end())
self.parent += listitem
self.blank_finish = blank_finish
return [], next_state, []
class DefinitionList(SpecializedBody):
"""Second and subsequent definition_list_items."""
def text(self, match, context, next_state):
"""Definition lists."""
return [match.string], 'Definition', []
class EnumeratedList(SpecializedBody):
"""Second and subsequent enumerated_list list_items."""
def enumerator(self, match, context, next_state):
"""Enumerated list item."""
format, sequence, text, ordinal = self.parse_enumerator(
match, self.parent['enumtype'])
if (format != self.format
or (sequence != '#' and (sequence != self.parent['enumtype']
or self.auto
or ordinal != (self.lastordinal + 1)))
or not self.is_enumerated_list_item(ordinal, sequence, format)):
# different enumeration: new list
self.invalid_input()
if sequence == '#':
self.auto = 1
listitem, blank_finish = self.list_item(match.end())
self.parent += listitem
self.blank_finish = blank_finish
self.lastordinal = ordinal
return [], next_state, []
class FieldList(SpecializedBody):
"""Second and subsequent field_list fields."""
def field_marker(self, match, context, next_state):
"""Field list field."""
field, blank_finish = self.field(match)
self.parent += field
self.blank_finish = blank_finish
return [], next_state, []
class OptionList(SpecializedBody):
"""Second and subsequent option_list option_list_items."""
def option_marker(self, match, context, next_state):
"""Option list item."""
try:
option_list_item, blank_finish = self.option_list_item(match)
except MarkupError:
self.invalid_input()
self.parent += option_list_item
self.blank_finish = blank_finish
return [], next_state, []
class RFC2822List(SpecializedBody, RFC2822Body):
"""Second and subsequent RFC2822-style field_list fields."""
patterns = RFC2822Body.patterns
initial_transitions = RFC2822Body.initial_transitions
def rfc2822(self, match, context, next_state):
"""RFC2822-style field list item."""
field, blank_finish = self.rfc2822_field(match)
self.parent += field
self.blank_finish = blank_finish
return [], 'RFC2822List', []
blank = SpecializedBody.invalid_input
class ExtensionOptions(FieldList):
"""
Parse field_list fields for extension options.
No nested parsing is done (including inline markup parsing).
"""
def parse_field_body(self, indented, offset, node):
"""Override `Body.parse_field_body` for simpler parsing."""
lines = []
for line in list(indented) + ['']:
if line.strip():
lines.append(line)
elif lines:
text = '\n'.join(lines)
node += nodes.paragraph(text, text)
lines = []
class LineBlock(SpecializedBody):
"""Second and subsequent lines of a line_block."""
blank = SpecializedBody.invalid_input
def line_block(self, match, context, next_state):
"""New line of line block."""
lineno = self.state_machine.abs_line_number()
line, messages, blank_finish = self.line_block_line(match, lineno)
self.parent += line
self.parent.parent += messages
self.blank_finish = blank_finish
return [], next_state, []
class Explicit(SpecializedBody):
"""Second and subsequent explicit markup construct."""
def explicit_markup(self, match, context, next_state):
"""Footnotes, hyperlink targets, directives, comments."""
nodelist, blank_finish = self.explicit_construct(match)
self.parent += nodelist
self.blank_finish = blank_finish
return [], next_state, []
def anonymous(self, match, context, next_state):
"""Anonymous hyperlink targets."""
nodelist, blank_finish = self.anonymous_target(match)
self.parent += nodelist
self.blank_finish = blank_finish
return [], next_state, []
blank = SpecializedBody.invalid_input
class SubstitutionDef(Body):
"""
Parser for the contents of a substitution_definition element.
"""
patterns = {
'embedded_directive': re.compile(r'(%s)::( +|$)'
% Inliner.simplename),
'text': r''}
initial_transitions = ['embedded_directive', 'text']
def embedded_directive(self, match, context, next_state):
nodelist, blank_finish = self.directive(match,
alt=self.parent['names'][0])
self.parent += nodelist
if not self.state_machine.at_eof():
self.blank_finish = blank_finish
raise EOFError
def text(self, match, context, next_state):
if not self.state_machine.at_eof():
self.blank_finish = self.state_machine.is_next_line_blank()
raise EOFError
class Text(RSTState):
"""
Classifier of second line of a text block.
Could be a paragraph, a definition list item, or a title.
"""
patterns = {'underline': Body.patterns['line'],
'text': r''}
initial_transitions = [('underline', 'Body'), ('text', 'Body')]
def blank(self, match, context, next_state):
"""End of paragraph."""
# NOTE: self.paragraph returns [node, system_message(s)], literalnext
paragraph, literalnext = self.paragraph(
context, self.state_machine.abs_line_number() - 1)
self.parent += paragraph
if literalnext:
self.parent += self.literal_block()
return [], 'Body', []
def eof(self, context):
if context:
self.blank(None, context, None)
return []
def indent(self, match, context, next_state):
"""Definition list item."""
definitionlist = nodes.definition_list()
definitionlistitem, blank_finish = self.definition_list_item(context)
definitionlist += definitionlistitem
self.parent += definitionlist
offset = self.state_machine.line_offset + 1 # next line
newline_offset, blank_finish = self.nested_list_parse(
self.state_machine.input_lines[offset:],
input_offset=self.state_machine.abs_line_offset() + 1,
node=definitionlist, initial_state='DefinitionList',
blank_finish=blank_finish, blank_finish_state='Definition')
self.goto_line(newline_offset)
if not blank_finish:
self.parent += self.unindent_warning('Definition list')
return [], 'Body', []
def underline(self, match, context, next_state):
"""Section title."""
lineno = self.state_machine.abs_line_number()
title = context[0].rstrip()
underline = match.string.rstrip()
source = title + '\n' + underline
messages = []
if column_width(title) > len(underline):
if len(underline) < 4:
if self.state_machine.match_titles:
msg = self.reporter.info(
'Possible title underline, too short for the title.\n'
"Treating it as ordinary text because it's so short.",
line=lineno)
self.parent += msg
raise statemachine.TransitionCorrection('text')
else:
blocktext = context[0] + '\n' + self.state_machine.line
msg = self.reporter.warning(
'Title underline too short.',
nodes.literal_block(blocktext, blocktext),
line=lineno)
messages.append(msg)
if not self.state_machine.match_titles:
blocktext = context[0] + '\n' + self.state_machine.line
# We need get_source_and_line() here to report correctly
src, srcline = self.state_machine.get_source_and_line()
# TODO: why is abs_line_number() == srcline+1
# if the error is in a table (try with test_tables.py)?
# print("get_source_and_line", srcline)
# print("abs_line_number", self.state_machine.abs_line_number())
msg = self.reporter.severe(
'Unexpected section title.',
nodes.literal_block(blocktext, blocktext),
source=src, line=srcline)
self.parent += messages
self.parent += msg
return [], next_state, []
style = underline[0]
context[:] = []
self.section(title, source, style, lineno - 1, messages)
return [], next_state, []
def text(self, match, context, next_state):
"""Paragraph."""
startline = self.state_machine.abs_line_number() - 1
msg = None
try:
block = self.state_machine.get_text_block(flush_left=True)
except statemachine.UnexpectedIndentationError as err:
block, src, srcline = err.args
msg = self.reporter.error('Unexpected indentation.',
source=src, line=srcline)
lines = context + list(block)
paragraph, literalnext = self.paragraph(lines, startline)
self.parent += paragraph
self.parent += msg
if literalnext:
try:
self.state_machine.next_line()
except EOFError:
pass
self.parent += self.literal_block()
return [], next_state, []
def literal_block(self):
"""Return a list of nodes."""
(indented, indent, offset, blank_finish
) = self.state_machine.get_indented()
while indented and not indented[-1].strip():
indented.trim_end()
if not indented:
return self.quoted_literal_block()
data = '\n'.join(indented)
literal_block = nodes.literal_block(data, data)
(literal_block.source,
literal_block.line) = self.state_machine.get_source_and_line(offset+1)
nodelist = [literal_block]
if not blank_finish:
nodelist.append(self.unindent_warning('Literal block'))
return nodelist
def quoted_literal_block(self):
abs_line_offset = self.state_machine.abs_line_offset()
offset = self.state_machine.line_offset
parent_node = nodes.Element()
new_abs_offset = self.nested_parse(
self.state_machine.input_lines[offset:],
input_offset=abs_line_offset, node=parent_node, match_titles=False,
state_machine_kwargs={'state_classes': (QuotedLiteralBlock,),
'initial_state': 'QuotedLiteralBlock'})
self.goto_line(new_abs_offset)
return parent_node.children
def definition_list_item(self, termline):
(indented, indent, line_offset, blank_finish
) = self.state_machine.get_indented()
itemnode = nodes.definition_list_item(
'\n'.join(termline + list(indented)))
lineno = self.state_machine.abs_line_number() - 1
(itemnode.source,
itemnode.line) = self.state_machine.get_source_and_line(lineno)
termlist, messages = self.term(termline, lineno)
itemnode += termlist
definition = nodes.definition('', *messages)
itemnode += definition
if termline[0][-2:] == '::':
definition += self.reporter.info(
'Blank line missing before literal block (after the "::")? '
'Interpreted as a definition list item.',
line=lineno+1)
self.nested_parse(indented, input_offset=line_offset, node=definition)
return itemnode, blank_finish
classifier_delimiter = re.compile(' +: +')
def term(self, lines, lineno):
"""Return a definition_list's term and optional classifiers."""
assert len(lines) == 1
text_nodes, messages = self.inline_text(lines[0], lineno)
term_node = nodes.term(lines[0])
(term_node.source,
term_node.line) = self.state_machine.get_source_and_line(lineno)
node_list = [term_node]
for i in range(len(text_nodes)):
node = text_nodes[i]
if isinstance(node, nodes.Text):
parts = self.classifier_delimiter.split(node)
if len(parts) == 1:
node_list[-1] += node
else:
text = parts[0].rstrip()
textnode = nodes.Text(text)
node_list[-1] += textnode
for part in parts[1:]:
node_list.append(
nodes.classifier(unescape(part, True), part))
else:
node_list[-1] += node
return node_list, messages
class SpecializedText(Text):
"""
Superclass for second and subsequent lines of Text-variants.
All transition methods are disabled. Override individual methods in
subclasses to re-enable.
"""
def eof(self, context):
"""Incomplete construct."""
return []
def invalid_input(self, match=None, context=None, next_state=None):
"""Not a compound element member. Abort this state machine."""
raise EOFError
blank = invalid_input
indent = invalid_input
underline = invalid_input
text = invalid_input
class Definition(SpecializedText):
"""Second line of potential definition_list_item."""
def eof(self, context):
"""Not a definition."""
self.state_machine.previous_line(2) # so parent SM can reassess
return []
def indent(self, match, context, next_state):
"""Definition list item."""
itemnode, blank_finish = self.definition_list_item(context)
self.parent += itemnode
self.blank_finish = blank_finish
return [], 'DefinitionList', []
class Line(SpecializedText):
"""
Second line of over- & underlined section title or transition marker.
"""
eofcheck = 1 # @@@ ???
"""Set to 0 while parsing sections, so that we don't catch the EOF."""
def eof(self, context):
"""Transition marker at end of section or document."""
marker = context[0].strip()
if self.memo.section_bubble_up_kludge:
self.memo.section_bubble_up_kludge = False
elif len(marker) < 4:
self.state_correction(context)
if self.eofcheck: # ignore EOFError with sections
src, srcline = self.state_machine.get_source_and_line()
# lineno = self.state_machine.abs_line_number() - 1
transition = nodes.transition(rawsource=context[0])
transition.source = src
transition.line = srcline - 1
# transition.line = lineno
self.parent += transition
self.eofcheck = 1
return []
def blank(self, match, context, next_state):
"""Transition marker."""
src, srcline = self.state_machine.get_source_and_line()
marker = context[0].strip()
if len(marker) < 4:
self.state_correction(context)
transition = nodes.transition(rawsource=marker)
transition.source = src
transition.line = srcline - 1
self.parent += transition
return [], 'Body', []
def text(self, match, context, next_state):
"""Potential over- & underlined title."""
lineno = self.state_machine.abs_line_number() - 1
overline = context[0]
title = match.string
underline = ''
try:
underline = self.state_machine.next_line()
except EOFError:
blocktext = overline + '\n' + title
if len(overline.rstrip()) < 4:
self.short_overline(context, blocktext, lineno, 2)
else:
msg = self.reporter.severe(
'Incomplete section title.',
nodes.literal_block(blocktext, blocktext),
line=lineno)
self.parent += msg
return [], 'Body', []
source = '%s\n%s\n%s' % (overline, title, underline)
overline = overline.rstrip()
underline = underline.rstrip()
if not self.transitions['underline'][0].match(underline):
blocktext = overline + '\n' + title + '\n' + underline
if len(overline.rstrip()) < 4:
self.short_overline(context, blocktext, lineno, 2)
else:
msg = self.reporter.severe(
'Missing matching underline for section title overline.',
nodes.literal_block(source, source),
line=lineno)
self.parent += msg
return [], 'Body', []
elif overline != underline:
blocktext = overline + '\n' + title + '\n' + underline
if len(overline.rstrip()) < 4:
self.short_overline(context, blocktext, lineno, 2)
else:
msg = self.reporter.severe(
'Title overline & underline mismatch.',
nodes.literal_block(source, source),
line=lineno)
self.parent += msg
return [], 'Body', []
title = title.rstrip()
messages = []
if column_width(title) > len(overline):
blocktext = overline + '\n' + title + '\n' + underline
if len(overline.rstrip()) < 4:
self.short_overline(context, blocktext, lineno, 2)
else:
msg = self.reporter.warning(
'Title overline too short.',
nodes.literal_block(source, source),
line=lineno)
messages.append(msg)
style = (overline[0], underline[0])
self.eofcheck = 0 # @@@ not sure this is correct
self.section(title.lstrip(), source, style, lineno + 1, messages)
self.eofcheck = 1
return [], 'Body', []
indent = text # indented title
def underline(self, match, context, next_state):
overline = context[0]
blocktext = overline + '\n' + self.state_machine.line
lineno = self.state_machine.abs_line_number() - 1
if len(overline.rstrip()) < 4:
self.short_overline(context, blocktext, lineno, 1)
msg = self.reporter.error(
'Invalid section title or transition marker.',
nodes.literal_block(blocktext, blocktext),
line=lineno)
self.parent += msg
return [], 'Body', []
def short_overline(self, context, blocktext, lineno, lines=1):
msg = self.reporter.info(
'Possible incomplete section title.\nTreating the overline as '
"ordinary text because it's so short.",
line=lineno)
self.parent += msg
self.state_correction(context, lines)
def state_correction(self, context, lines=1):
self.state_machine.previous_line(lines)
context[:] = []
raise statemachine.StateCorrection('Body', 'text')
class QuotedLiteralBlock(RSTState):
"""
Nested parse handler for quoted (unindented) literal blocks.
Special-purpose. Not for inclusion in `state_classes`.
"""
patterns = {'initial_quoted': r'(%(nonalphanum7bit)s)' % Body.pats,
'text': r''}
initial_transitions = ('initial_quoted', 'text')
def __init__(self, state_machine, debug=False):
RSTState.__init__(self, state_machine, debug)
self.messages = []
self.initial_lineno = None
def blank(self, match, context, next_state):
if context:
raise EOFError
else:
return context, next_state, []
def eof(self, context):
if context:
src, srcline = self.state_machine.get_source_and_line(
self.initial_lineno)
text = '\n'.join(context)
literal_block = nodes.literal_block(text, text)
literal_block.source = src
literal_block.line = srcline
self.parent += literal_block
else:
self.parent += self.reporter.warning(
'Literal block expected; none found.',
line=self.state_machine.abs_line_number()
) # src not available, statemachine.input_lines is empty
self.state_machine.previous_line()
self.parent += self.messages
return []
def indent(self, match, context, next_state):
assert context, ('QuotedLiteralBlock.indent: context should not '
'be empty!')
self.messages.append(
self.reporter.error('Unexpected indentation.',
line=self.state_machine.abs_line_number()))
self.state_machine.previous_line()
raise EOFError
def initial_quoted(self, match, context, next_state):
"""Match arbitrary quote character on the first line only."""
self.remove_transition('initial_quoted')
quote = match.string[0]
pattern = re.compile(re.escape(quote))
# New transition matches consistent quotes only:
self.add_transition('quoted',
(pattern, self.quoted, self.__class__.__name__))
self.initial_lineno = self.state_machine.abs_line_number()
return [match.string], next_state, []
def quoted(self, match, context, next_state):
"""Match consistent quotes on subsequent lines."""
context.append(match.string)
return context, next_state, []
def text(self, match, context, next_state):
if context:
self.messages.append(
self.reporter.error('Inconsistent literal block quoting.',
line=self.state_machine.abs_line_number()))
self.state_machine.previous_line()
raise EOFError
state_classes = (Body, BulletList, DefinitionList, EnumeratedList, FieldList,
OptionList, LineBlock, ExtensionOptions, Explicit, Text,
Definition, Line, SubstitutionDef, RFC2822Body, RFC2822List)
"""Standard set of State classes used to start `RSTStateMachine`."""