guppy_basecaller: env/lib/python3.7/site-packages/docutils/parsers/rst/states.py comparison

comparison env/lib/python3.7/site-packages/docutils/parsers/rst/states.py @ 0:26e78fe6e8c4 draft

"planemo upload commit c699937486c35866861690329de38ec1a5d9f783"

author	shellac
date	Sat, 02 May 2020 07:14:21 -0400
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+:26e78fe6e8c4
+# $Id: states.py 8359 2019-08-26 16:45:33Z 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 sys
+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 whitespace_normalize_name
+import docutils.parsers.rst
+from docutils.parsers.rst import directives, languages, tableparser, roles
+from docutils.parsers.rst.languages import en as _fallback_language_module
+from docutils.utils import escape2null, unescape, 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(object):
+"""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)
+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
+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 1 (true) or None (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 1
+else:                       # not at lowest level
+self.parent += self.title_inconsistent(source, lineno)
+return None
+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 1
+else:                           # invalid subsection
+self.parent += self.title_inconsistent(source, lineno)
+return None
+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, re.UNICODE)
+else:
+return regexp
+class Inliner(object):
+"""
+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 = u'(^|(?<!\x00))'
+end_string_suffix = u''
+else:
+start_string_prefix = (u'(^|(?<=\\s|[%s%s]))' %
+(punctuation_chars.openers,
+punctuation_chars.delimiters))
+end_string_suffix = (u'($|(?=\\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 reference
+)
+]
+),
+('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, re.UNICODE),
+strong=re.compile(self.non_whitespace_escape_before
++ r'(\*\*)' + end_string_suffix, re.UNICODE),
+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 | re.UNICODE),
+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 | re.UNICODE),
+literal=re.compile(self.non_whitespace_before + '(``)'
++ end_string_suffix, re.UNICODE),
+target=re.compile(self.non_whitespace_escape_before
++ r'(`)' + end_string_suffix, re.UNICODE),
+substitution_ref=re.compile(self.non_whitespace_escape_before
++ r'(\|_{0,2})'
++ end_string_suffix, re.UNICODE),
+email=re.compile(self.email_pattern % args + '$',
+re.VERBOSE | re.UNICODE),
+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 | re.UNICODE),
+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 | re.UNICODE),
+rfc=re.compile(
+r"""
+%(start_string_prefix)s
+(RFC(-|\s+)?(?P<rfcnum>\d+))
+%(end_string_suffix)s""" % args, re.VERBOSE | re.UNICODE))
+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.
+"""
+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=1)
+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, unescape(text, True))]
+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] + '$', re.UNICODE)
+grid_table_top_pat = re.compile(r'\+-[-+]+-\+ *$')
+"""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': u'[-+*\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_lines,
+attribution_lines,
+attribution_offset,
+indented,
+new_line_offset) = self.split_attribution(indented, line_offset)
+blockquote = nodes.block_quote()
+self.nested_parse(blockquote_lines, line_offset, blockquote)
+elements.append(blockquote)
+if attribution_lines:
+attribution, messages = self.parse_attribution(
+attribution_lines, 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(u'(---?(?!-)|\u2014) *(?=[^ \\n])',
+re.UNICODE)
+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, content offset,
+attribution lines, attribution offset, remaining indented lines).
+"""
+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 = self.state_machine.abs_line_number() + line_offset
+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
+: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(u'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 = u'\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
+([ ]+|$)        # followed by whitespace
+""" % vars(Inliner), re.VERBOSE | re.UNICODE),
+reference=re.compile(r"""
+(
+(?P<simple>%(simplename)s)_
+|                  # *OR*
+`                  # open backquote
+(?![ ])            # not space
+(?P<phrase>.+?)    # hyperlink phrase
+%(non_whitespace_escape_before)s
+`_                 # close backquote,
+# reference mark
+)
+$                  # end of string
+""" % vars(Inliner), re.VERBOSE | re.UNICODE),
+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 | re.UNICODE),)
+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
+block[0] = (block[0].strip() + ' ')[subdefmatch.end()-len(escaped)-1:-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.traverse(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')):
+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])
+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 not match.string[match.end():].strip() \
+and self.state_machine.is_next_line_blank(): # an empty comment?
+return [nodes.comment()], 1 # "A tiny but practical wart."
+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 | re.UNICODE)),
+(citation,
+re.compile(r"""
+\.\.[ ]+          # explicit markup start
+\[(%s)\]          # citation label
+([ ]+|$)          # whitespace or end of line
+""" % Inliner.simplename, re.VERBOSE | re.UNICODE)),
+(hyperlink_target,
+re.compile(r"""
+\.\.[ ]+          # explicit markup start
+_                 # target indicator
+(?![ ]|$)         # first char. not space or EOL
+""", re.VERBOSE | re.UNICODE)),
+(substitution_def,
+re.compile(r"""
+\.\.[ ]+          # explicit markup start
+\|                # substitution indicator
+(?![ ]|$)         # first char. not space or EOL
+""", re.VERBOSE | re.UNICODE)),
+(directive,
+re.compile(r"""
+\.\.[ ]+          # explicit markup start
+(%s)              # directive name
+[ ]?              # optional space
+::                # directive delimiter
+([ ]+|$)          # whitespace or end of line
+""" % Inliner.simplename, re.VERBOSE | re.UNICODE))]
+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, re.UNICODE),
+'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
+lineno = self.state_machine.abs_line_number() - 1
+transition = nodes.transition(rawsource=context[0])
+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, because 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), re.UNICODE)
+# 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`."""

Mercurial > repos > shellac > guppy_basecaller

comparison env/lib/python3.7/site-packages/docutils/parsers/rst/states.py @ 0:26e78fe6e8c4 draft