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2317 lines
79 KiB
2317 lines
79 KiB
# $Id: nodes.py 8446 2019-12-23 21:43:20Z milde $
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# Author: David Goodger <goodger@python.org>
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# Maintainer: docutils-develop@lists.sourceforge.net
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# Copyright: This module has been placed in the public domain.
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"""
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Docutils document tree element class library.
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Classes in CamelCase are abstract base classes or auxiliary classes. The one
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exception is `Text`, for a text (PCDATA) node; uppercase is used to
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differentiate from element classes. Classes in lower_case_with_underscores
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are element classes, matching the XML element generic identifiers in the DTD_.
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The position of each node (the level at which it can occur) is significant and
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is represented by abstract base classes (`Root`, `Structural`, `Body`,
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`Inline`, etc.). Certain transformations will be easier because we can use
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``isinstance(node, base_class)`` to determine the position of the node in the
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hierarchy.
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.. _DTD: http://docutils.sourceforge.net/docs/ref/docutils.dtd
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"""
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from __future__ import print_function
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from collections import Counter
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__docformat__ = 'reStructuredText'
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import sys
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import os
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import re
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import warnings
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import unicodedata
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if sys.version_info >= (3, 0):
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unicode = str # noqa
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basestring = str # noqa
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class _traversal_list(list):
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# auxiliary class to report a FutureWarning
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done = False
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def _warning_decorator(fun):
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msg = ("\n The iterable returned by Node.traverse()"
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"\n will become an iterator instead of a list in "
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"Docutils > 0.16.")
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def wrapper(self, *args, **kwargs):
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if not self.done:
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warnings.warn(msg, FutureWarning, stacklevel=2)
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self.done = True
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return fun(self, *args, **kwargs)
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return wrapper
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__add__ = _warning_decorator(list.__add__)
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__contains__ = _warning_decorator(list.__contains__)
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__getitem__ = _warning_decorator(list.__getitem__)
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__reversed__ = _warning_decorator(list.__reversed__)
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__setitem__ = _warning_decorator(list.__setitem__)
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append = _warning_decorator(list.append)
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count = _warning_decorator(list.count)
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extend = _warning_decorator(list.extend)
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index = _warning_decorator(list.index)
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insert = _warning_decorator(list.insert)
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pop = _warning_decorator(list.pop)
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reverse = _warning_decorator(list.reverse)
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# ==============================
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# Functional Node Base Classes
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# ==============================
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class Node(object):
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"""Abstract base class of nodes in a document tree."""
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parent = None
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"""Back-reference to the Node immediately containing this Node."""
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document = None
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"""The `document` node at the root of the tree containing this Node."""
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source = None
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"""Path or description of the input source which generated this Node."""
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line = None
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"""The line number (1-based) of the beginning of this Node in `source`."""
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def __bool__(self):
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"""
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Node instances are always true, even if they're empty. A node is more
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than a simple container. Its boolean "truth" does not depend on
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having one or more subnodes in the doctree.
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Use `len()` to check node length. Use `None` to represent a boolean
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false value.
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"""
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return True
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if sys.version_info < (3, 0):
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__nonzero__ = __bool__
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if sys.version_info < (3, 0):
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# on 2.x, str(node) will be a byte string with Unicode
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# characters > 255 escaped; on 3.x this is no longer necessary
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def __str__(self):
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return unicode(self).encode('raw_unicode_escape')
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def asdom(self, dom=None):
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"""Return a DOM **fragment** representation of this Node."""
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if dom is None:
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import xml.dom.minidom as dom
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domroot = dom.Document()
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return self._dom_node(domroot)
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def pformat(self, indent=' ', level=0):
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"""
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Return an indented pseudo-XML representation, for test purposes.
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Override in subclasses.
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"""
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raise NotImplementedError
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def copy(self):
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"""Return a copy of self."""
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raise NotImplementedError
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def deepcopy(self):
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"""Return a deep copy of self (also copying children)."""
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raise NotImplementedError
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def astext(self):
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"""Return a string representation of this Node."""
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raise NotImplementedError
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def setup_child(self, child):
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child.parent = self
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if self.document:
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child.document = self.document
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if child.source is None:
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child.source = self.document.current_source
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if child.line is None:
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child.line = self.document.current_line
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def walk(self, visitor):
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"""
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Traverse a tree of `Node` objects, calling the
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`dispatch_visit()` method of `visitor` when entering each
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node. (The `walkabout()` method is similar, except it also
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calls the `dispatch_departure()` method before exiting each
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node.)
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This tree traversal supports limited in-place tree
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modifications. Replacing one node with one or more nodes is
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OK, as is removing an element. However, if the node removed
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or replaced occurs after the current node, the old node will
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still be traversed, and any new nodes will not.
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Within ``visit`` methods (and ``depart`` methods for
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`walkabout()`), `TreePruningException` subclasses may be raised
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(`SkipChildren`, `SkipSiblings`, `SkipNode`, `SkipDeparture`).
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Parameter `visitor`: A `NodeVisitor` object, containing a
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``visit`` implementation for each `Node` subclass encountered.
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Return true if we should stop the traversal.
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"""
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stop = False
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visitor.document.reporter.debug(
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'docutils.nodes.Node.walk calling dispatch_visit for %s'
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% self.__class__.__name__)
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try:
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try:
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visitor.dispatch_visit(self)
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except (SkipChildren, SkipNode):
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return stop
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except SkipDeparture: # not applicable; ignore
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pass
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children = self.children
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try:
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for child in children[:]:
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if child.walk(visitor):
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stop = True
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break
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except SkipSiblings:
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pass
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except StopTraversal:
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stop = True
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return stop
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def walkabout(self, visitor):
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"""
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Perform a tree traversal similarly to `Node.walk()` (which
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see), except also call the `dispatch_departure()` method
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before exiting each node.
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Parameter `visitor`: A `NodeVisitor` object, containing a
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``visit`` and ``depart`` implementation for each `Node`
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subclass encountered.
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Return true if we should stop the traversal.
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"""
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call_depart = True
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stop = False
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visitor.document.reporter.debug(
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'docutils.nodes.Node.walkabout calling dispatch_visit for %s'
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% self.__class__.__name__)
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try:
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try:
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visitor.dispatch_visit(self)
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except SkipNode:
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return stop
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except SkipDeparture:
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call_depart = False
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children = self.children
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try:
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for child in children[:]:
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if child.walkabout(visitor):
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stop = True
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break
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except SkipSiblings:
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pass
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except SkipChildren:
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pass
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except StopTraversal:
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stop = True
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if call_depart:
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visitor.document.reporter.debug(
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'docutils.nodes.Node.walkabout calling dispatch_departure '
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'for %s' % self.__class__.__name__)
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visitor.dispatch_departure(self)
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return stop
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def _fast_traverse(self, cls):
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"""Return iterator that only supports instance checks."""
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if isinstance(self, cls):
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yield self
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for child in self.children:
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for subnode in child._fast_traverse(cls):
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yield subnode
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def _all_traverse(self):
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"""Return iterator that doesn't check for a condition."""
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yield self
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for child in self.children:
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for subnode in child._all_traverse():
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yield subnode
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def traverse(self, condition=None, include_self=True, descend=True,
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siblings=False, ascend=False):
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"""
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Return an iterable containing
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* self (if include_self is true)
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* all descendants in tree traversal order (if descend is true)
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* all siblings (if siblings is true) and their descendants (if
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also descend is true)
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* the siblings of the parent (if ascend is true) and their
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descendants (if also descend is true), and so on
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If `condition` is not None, the iterable contains only nodes
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for which ``condition(node)`` is true. If `condition` is a
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node class ``cls``, it is equivalent to a function consisting
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of ``return isinstance(node, cls)``.
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If ascend is true, assume siblings to be true as well.
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For example, given the following tree::
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<paragraph>
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<emphasis> <--- emphasis.traverse() and
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<strong> <--- strong.traverse() are called.
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Foo
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Bar
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<reference name="Baz" refid="baz">
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Baz
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Then list(emphasis.traverse()) equals ::
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[<emphasis>, <strong>, <#text: Foo>, <#text: Bar>]
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and list(strong.traverse(ascend=True)) equals ::
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[<strong>, <#text: Foo>, <#text: Bar>, <reference>, <#text: Baz>]
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"""
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# Although the documented API only promises an "iterable" as return
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# value, the implementation returned a list up to v. 0.15. Some 3rd
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# party code still relies on this (e.g. Sphinx as of 2019-09-07).
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# Therefore, let's return a list until this is sorted out:
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return _traversal_list(self._traverse(condition, include_self,
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descend, siblings, ascend))
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def _traverse(self, condition=None, include_self=True, descend=True,
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siblings=False, ascend=False):
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"""Return iterator over nodes following `self`. See `traverse()`."""
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if ascend:
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siblings=True
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# Check for special argument combinations that allow using an
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# optimized version of traverse()
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if include_self and descend and not siblings:
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if condition is None:
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for subnode in self._all_traverse():
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yield subnode
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return
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elif isinstance(condition, type):
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for subnode in self._fast_traverse(condition):
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yield subnode
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return
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# Check if `condition` is a class (check for TypeType for Python
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# implementations that use only new-style classes, like PyPy).
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if isinstance(condition, type):
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node_class = condition
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def condition(node, node_class=node_class):
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return isinstance(node, node_class)
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if include_self and (condition is None or condition(self)):
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yield self
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if descend and len(self.children):
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for child in self:
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for subnode in child._traverse(condition=condition,
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include_self=True, descend=True,
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siblings=False, ascend=False):
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yield subnode
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if siblings or ascend:
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node = self
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while node.parent:
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index = node.parent.index(node)
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for sibling in node.parent[index+1:]:
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for subnode in sibling._traverse(condition=condition,
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include_self=True, descend=descend,
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siblings=False, ascend=False):
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yield subnode
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if not ascend:
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break
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else:
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node = node.parent
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def next_node(self, condition=None, include_self=False, descend=True,
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siblings=False, ascend=False):
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"""
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Return the first node in the iterable returned by traverse(),
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or None if the iterable is empty.
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Parameter list is the same as of traverse. Note that
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include_self defaults to False, though.
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"""
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node_iterator = self._traverse(condition, include_self,
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descend, siblings, ascend)
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try:
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return next(node_iterator)
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except StopIteration:
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return None
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if sys.version_info < (3, 0):
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class reprunicode(unicode):
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"""
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A unicode sub-class that removes the initial u from unicode's repr.
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"""
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def __repr__(self):
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return unicode.__repr__(self)[1:]
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else:
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reprunicode = unicode
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def ensure_str(s):
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"""
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Failsave conversion of `unicode` to `str`.
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"""
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if sys.version_info < (3, 0) and isinstance(s, unicode):
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return s.encode('ascii', 'backslashreplace')
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return s
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# definition moved here from `utils` to avoid circular import dependency
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def unescape(text, restore_backslashes=False, respect_whitespace=False):
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"""
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Return a string with nulls removed or restored to backslashes.
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Backslash-escaped spaces are also removed.
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"""
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# `respect_whitespace` is ignored (since introduction 2016-12-16)
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if restore_backslashes:
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return text.replace('\x00', '\\')
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else:
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for sep in ['\x00 ', '\x00\n', '\x00']:
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text = ''.join(text.split(sep))
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return text
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class Text(Node, reprunicode):
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"""
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Instances are terminal nodes (leaves) containing text only; no child
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nodes or attributes. Initialize by passing a string to the constructor.
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Access the text itself with the `astext` method.
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"""
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tagname = '#text'
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children = ()
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"""Text nodes have no children, and cannot have children."""
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if sys.version_info > (3, 0):
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def __new__(cls, data, rawsource=None):
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"""Prevent the rawsource argument from propagating to str."""
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if isinstance(data, bytes):
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raise TypeError('expecting str data, not bytes')
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return reprunicode.__new__(cls, data)
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else:
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def __new__(cls, data, rawsource=None):
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"""Prevent the rawsource argument from propagating to str."""
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return reprunicode.__new__(cls, data)
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def __init__(self, data, rawsource=''):
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self.rawsource = rawsource
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"""The raw text from which this element was constructed."""
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def shortrepr(self, maxlen=18):
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data = self
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if len(data) > maxlen:
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data = data[:maxlen-4] + ' ...'
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return '<%s: %r>' % (self.tagname, reprunicode(data))
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def __repr__(self):
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return self.shortrepr(maxlen=68)
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def _dom_node(self, domroot):
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return domroot.createTextNode(unicode(self))
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def astext(self):
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return reprunicode(unescape(self))
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# Note about __unicode__: The implementation of __unicode__ here,
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# and the one raising NotImplemented in the superclass Node had
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# to be removed when changing Text to a subclass of unicode instead
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# of UserString, since there is no way to delegate the __unicode__
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# call to the superclass unicode:
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# unicode itself does not have __unicode__ method to delegate to
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# and calling unicode(self) or unicode.__new__ directly creates
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# an infinite loop
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def copy(self):
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return self.__class__(reprunicode(self), rawsource=self.rawsource)
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def deepcopy(self):
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return self.copy()
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def pformat(self, indent=' ', level=0):
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indent = indent * level
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lines = [indent+line for line in self.astext().splitlines()]
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if not lines:
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return ''
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return '\n'.join(lines) + '\n'
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# rstrip and lstrip are used by substitution definitions where
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# they are expected to return a Text instance, this was formerly
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# taken care of by UserString.
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def rstrip(self, chars=None):
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return self.__class__(reprunicode.rstrip(self, chars), self.rawsource)
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def lstrip(self, chars=None):
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return self.__class__(reprunicode.lstrip(self, chars), self.rawsource)
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class Element(Node):
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"""
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`Element` is the superclass to all specific elements.
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Elements contain attributes and child nodes. Elements emulate
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dictionaries for attributes, indexing by attribute name (a string). To
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set the attribute 'att' to 'value', do::
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element['att'] = 'value'
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There are two special attributes: 'ids' and 'names'. Both are
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lists of unique identifiers, and names serve as human interfaces
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to IDs. Names are case- and whitespace-normalized (see the
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fully_normalize_name() function), and IDs conform to the regular
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expression ``[a-z](-?[a-z0-9]+)*`` (see the make_id() function).
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Elements also emulate lists for child nodes (element nodes and/or text
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nodes), indexing by integer. To get the first child node, use::
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element[0]
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Elements may be constructed using the ``+=`` operator. To add one new
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child node to element, do::
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element += node
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This is equivalent to ``element.append(node)``.
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|
To add a list of multiple child nodes at once, use the same ``+=``
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operator::
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element += [node1, node2]
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This is equivalent to ``element.extend([node1, node2])``.
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"""
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basic_attributes = ('ids', 'classes', 'names', 'dupnames')
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|
"""List attributes which are defined for every Element-derived class
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instance and can be safely transferred to a different node."""
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local_attributes = ('backrefs',)
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|
"""A list of class-specific attributes that should not be copied with the
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standard attributes when replacing a node.
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NOTE: Derived classes should override this value to prevent any of its
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attributes being copied by adding to the value in its parent class."""
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list_attributes = basic_attributes + local_attributes
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"""List attributes, automatically initialized to empty lists for
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all nodes."""
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known_attributes = list_attributes + ('source', 'rawsource')
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"""List attributes that are known to the Element base class."""
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tagname = None
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"""The element generic identifier. If None, it is set as an instance
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attribute to the name of the class."""
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|
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child_text_separator = '\n\n'
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"""Separator for child nodes, used by `astext()` method."""
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|
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def __init__(self, rawsource='', *children, **attributes):
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self.rawsource = rawsource
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"""The raw text from which this element was constructed.
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NOTE: some elements do not set this value (default '').
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"""
|
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self.children = []
|
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"""List of child nodes (elements and/or `Text`)."""
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self.extend(children) # maintain parent info
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|
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self.attributes = {}
|
|
"""Dictionary of attribute {name: value}."""
|
|
|
|
# Initialize list attributes.
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|
for att in self.list_attributes:
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|
self.attributes[att] = []
|
|
|
|
for att, value in attributes.items():
|
|
att = att.lower()
|
|
if att in self.list_attributes:
|
|
# mutable list; make a copy for this node
|
|
self.attributes[att] = value[:]
|
|
else:
|
|
self.attributes[att] = value
|
|
|
|
if self.tagname is None:
|
|
self.tagname = self.__class__.__name__
|
|
|
|
def _dom_node(self, domroot):
|
|
element = domroot.createElement(self.tagname)
|
|
for attribute, value in self.attlist():
|
|
if isinstance(value, list):
|
|
value = ' '.join([serial_escape('%s' % (v,)) for v in value])
|
|
element.setAttribute(attribute, '%s' % value)
|
|
for child in self.children:
|
|
element.appendChild(child._dom_node(domroot))
|
|
return element
|
|
|
|
def __repr__(self):
|
|
data = ''
|
|
for c in self.children:
|
|
data += c.shortrepr()
|
|
if len(data) > 60:
|
|
data = data[:56] + ' ...'
|
|
break
|
|
if self['names']:
|
|
return '<%s "%s": %s>' % (self.__class__.__name__,
|
|
'; '.join([ensure_str(n) for n in self['names']]), data)
|
|
else:
|
|
return '<%s: %s>' % (self.__class__.__name__, data)
|
|
|
|
def shortrepr(self):
|
|
if self['names']:
|
|
return '<%s "%s"...>' % (self.__class__.__name__,
|
|
'; '.join([ensure_str(n) for n in self['names']]))
|
|
else:
|
|
return '<%s...>' % self.tagname
|
|
|
|
def __unicode__(self):
|
|
if self.children:
|
|
return u'%s%s%s' % (self.starttag(),
|
|
''.join([unicode(c) for c in self.children]),
|
|
self.endtag())
|
|
else:
|
|
return self.emptytag()
|
|
|
|
if sys.version_info >= (3, 0):
|
|
__str__ = __unicode__
|
|
|
|
def starttag(self, quoteattr=None):
|
|
# the optional arg is used by the docutils_xml writer
|
|
if quoteattr is None:
|
|
quoteattr = pseudo_quoteattr
|
|
parts = [self.tagname]
|
|
for name, value in self.attlist():
|
|
if value is None: # boolean attribute
|
|
parts.append('%s="True"' % name)
|
|
continue
|
|
if isinstance(value, list):
|
|
values = [serial_escape('%s' % (v,)) for v in value]
|
|
value = ' '.join(values)
|
|
else:
|
|
value = unicode(value)
|
|
value = quoteattr(value)
|
|
parts.append(u'%s=%s' % (name, value))
|
|
return u'<%s>' % u' '.join(parts)
|
|
|
|
def endtag(self):
|
|
return '</%s>' % self.tagname
|
|
|
|
def emptytag(self):
|
|
return u'<%s/>' % u' '.join([self.tagname] +
|
|
['%s="%s"' % (n, v)
|
|
for n, v in self.attlist()])
|
|
|
|
def __len__(self):
|
|
return len(self.children)
|
|
|
|
def __getitem__(self, key):
|
|
if isinstance(key, basestring):
|
|
return self.attributes[key]
|
|
elif isinstance(key, int):
|
|
return self.children[key]
|
|
elif isinstance(key, slice):
|
|
assert key.step in (None, 1), 'cannot handle slice with stride'
|
|
return self.children[key.start:key.stop]
|
|
else:
|
|
raise TypeError('element index must be an integer, a slice, or '
|
|
'an attribute name string')
|
|
|
|
def __setitem__(self, key, item):
|
|
if isinstance(key, basestring):
|
|
self.attributes[str(key)] = item
|
|
elif isinstance(key, int):
|
|
self.setup_child(item)
|
|
self.children[key] = item
|
|
elif isinstance(key, slice):
|
|
assert key.step in (None, 1), 'cannot handle slice with stride'
|
|
for node in item:
|
|
self.setup_child(node)
|
|
self.children[key.start:key.stop] = item
|
|
else:
|
|
raise TypeError('element index must be an integer, a slice, or '
|
|
'an attribute name string')
|
|
|
|
def __delitem__(self, key):
|
|
if isinstance(key, basestring):
|
|
del self.attributes[key]
|
|
elif isinstance(key, int):
|
|
del self.children[key]
|
|
elif isinstance(key, slice):
|
|
assert key.step in (None, 1), 'cannot handle slice with stride'
|
|
del self.children[key.start:key.stop]
|
|
else:
|
|
raise TypeError('element index must be an integer, a simple '
|
|
'slice, or an attribute name string')
|
|
|
|
def __add__(self, other):
|
|
return self.children + other
|
|
|
|
def __radd__(self, other):
|
|
return other + self.children
|
|
|
|
def __iadd__(self, other):
|
|
"""Append a node or a list of nodes to `self.children`."""
|
|
if isinstance(other, Node):
|
|
self.append(other)
|
|
elif other is not None:
|
|
self.extend(other)
|
|
return self
|
|
|
|
def astext(self):
|
|
return self.child_text_separator.join(
|
|
[child.astext() for child in self.children])
|
|
|
|
def non_default_attributes(self):
|
|
atts = {}
|
|
for key, value in self.attributes.items():
|
|
if self.is_not_default(key):
|
|
atts[key] = value
|
|
return atts
|
|
|
|
def attlist(self):
|
|
attlist = sorted(self.non_default_attributes().items())
|
|
return attlist
|
|
|
|
def get(self, key, failobj=None):
|
|
return self.attributes.get(key, failobj)
|
|
|
|
def hasattr(self, attr):
|
|
return attr in self.attributes
|
|
|
|
def delattr(self, attr):
|
|
if attr in self.attributes:
|
|
del self.attributes[attr]
|
|
|
|
def setdefault(self, key, failobj=None):
|
|
return self.attributes.setdefault(key, failobj)
|
|
|
|
has_key = hasattr
|
|
|
|
# support operator ``in``
|
|
def __contains__(self, key):
|
|
# support both membership test for children and attributes
|
|
# (has_key is translated to "in" by 2to3)
|
|
if isinstance(key, basestring):
|
|
return key in self.attributes
|
|
return key in self.children
|
|
|
|
def get_language_code(self, fallback=''):
|
|
"""Return node's language tag.
|
|
|
|
Look iteratively in self and parents for a class argument
|
|
starting with ``language-`` and return the remainder of it
|
|
(which should be a `BCP49` language tag) or the `fallback`.
|
|
"""
|
|
for cls in self.get('classes', []):
|
|
if cls.startswith('language-'):
|
|
return cls[9:]
|
|
try:
|
|
return self.parent.get_language(fallback)
|
|
except AttributeError:
|
|
return fallback
|
|
|
|
def append(self, item):
|
|
self.setup_child(item)
|
|
self.children.append(item)
|
|
|
|
def extend(self, item):
|
|
for node in item:
|
|
self.append(node)
|
|
|
|
def insert(self, index, item):
|
|
if isinstance(item, Node):
|
|
self.setup_child(item)
|
|
self.children.insert(index, item)
|
|
elif item is not None:
|
|
self[index:index] = item
|
|
|
|
def pop(self, i=-1):
|
|
return self.children.pop(i)
|
|
|
|
def remove(self, item):
|
|
self.children.remove(item)
|
|
|
|
def index(self, item):
|
|
return self.children.index(item)
|
|
|
|
def is_not_default(self, key):
|
|
if self[key] == [] and key in self.list_attributes:
|
|
return 0
|
|
else:
|
|
return 1
|
|
|
|
def update_basic_atts(self, dict_):
|
|
"""
|
|
Update basic attributes ('ids', 'names', 'classes',
|
|
'dupnames', but not 'source') from node or dictionary `dict_`.
|
|
"""
|
|
if isinstance(dict_, Node):
|
|
dict_ = dict_.attributes
|
|
for att in self.basic_attributes:
|
|
self.append_attr_list(att, dict_.get(att, []))
|
|
|
|
def append_attr_list(self, attr, values):
|
|
"""
|
|
For each element in values, if it does not exist in self[attr], append
|
|
it.
|
|
|
|
NOTE: Requires self[attr] and values to be sequence type and the
|
|
former should specifically be a list.
|
|
"""
|
|
# List Concatenation
|
|
for value in values:
|
|
if not value in self[attr]:
|
|
self[attr].append(value)
|
|
|
|
def coerce_append_attr_list(self, attr, value):
|
|
"""
|
|
First, convert both self[attr] and value to a non-string sequence
|
|
type; if either is not already a sequence, convert it to a list of one
|
|
element. Then call append_attr_list.
|
|
|
|
NOTE: self[attr] and value both must not be None.
|
|
"""
|
|
# List Concatenation
|
|
if not isinstance(self.get(attr), list):
|
|
self[attr] = [self[attr]]
|
|
if not isinstance(value, list):
|
|
value = [value]
|
|
self.append_attr_list(attr, value)
|
|
|
|
def replace_attr(self, attr, value, force = True):
|
|
"""
|
|
If self[attr] does not exist or force is True or omitted, set
|
|
self[attr] to value, otherwise do nothing.
|
|
"""
|
|
# One or the other
|
|
if force or self.get(attr) is None:
|
|
self[attr] = value
|
|
|
|
def copy_attr_convert(self, attr, value, replace = True):
|
|
"""
|
|
If attr is an attribute of self, set self[attr] to
|
|
[self[attr], value], otherwise set self[attr] to value.
|
|
|
|
NOTE: replace is not used by this function and is kept only for
|
|
compatibility with the other copy functions.
|
|
"""
|
|
if self.get(attr) is not value:
|
|
self.coerce_append_attr_list(attr, value)
|
|
|
|
def copy_attr_coerce(self, attr, value, replace):
|
|
"""
|
|
If attr is an attribute of self and either self[attr] or value is a
|
|
list, convert all non-sequence values to a sequence of 1 element and
|
|
then concatenate the two sequence, setting the result to self[attr].
|
|
If both self[attr] and value are non-sequences and replace is True or
|
|
self[attr] is None, replace self[attr] with value. Otherwise, do
|
|
nothing.
|
|
"""
|
|
if self.get(attr) is not value:
|
|
if isinstance(self.get(attr), list) or \
|
|
isinstance(value, list):
|
|
self.coerce_append_attr_list(attr, value)
|
|
else:
|
|
self.replace_attr(attr, value, replace)
|
|
|
|
def copy_attr_concatenate(self, attr, value, replace):
|
|
"""
|
|
If attr is an attribute of self and both self[attr] and value are
|
|
lists, concatenate the two sequences, setting the result to
|
|
self[attr]. If either self[attr] or value are non-sequences and
|
|
replace is True or self[attr] is None, replace self[attr] with value.
|
|
Otherwise, do nothing.
|
|
"""
|
|
if self.get(attr) is not value:
|
|
if isinstance(self.get(attr), list) and \
|
|
isinstance(value, list):
|
|
self.append_attr_list(attr, value)
|
|
else:
|
|
self.replace_attr(attr, value, replace)
|
|
|
|
def copy_attr_consistent(self, attr, value, replace):
|
|
"""
|
|
If replace is True or self[attr] is None, replace self[attr] with
|
|
value. Otherwise, do nothing.
|
|
"""
|
|
if self.get(attr) is not value:
|
|
self.replace_attr(attr, value, replace)
|
|
|
|
def update_all_atts(self, dict_, update_fun = copy_attr_consistent,
|
|
replace = True, and_source = False):
|
|
"""
|
|
Updates all attributes from node or dictionary `dict_`.
|
|
|
|
Appends the basic attributes ('ids', 'names', 'classes',
|
|
'dupnames', but not 'source') and then, for all other attributes in
|
|
dict_, updates the same attribute in self. When attributes with the
|
|
same identifier appear in both self and dict_, the two values are
|
|
merged based on the value of update_fun. Generally, when replace is
|
|
True, the values in self are replaced or merged with the values in
|
|
dict_; otherwise, the values in self may be preserved or merged. When
|
|
and_source is True, the 'source' attribute is included in the copy.
|
|
|
|
NOTE: When replace is False, and self contains a 'source' attribute,
|
|
'source' is not replaced even when dict_ has a 'source'
|
|
attribute, though it may still be merged into a list depending
|
|
on the value of update_fun.
|
|
NOTE: It is easier to call the update-specific methods then to pass
|
|
the update_fun method to this function.
|
|
"""
|
|
if isinstance(dict_, Node):
|
|
dict_ = dict_.attributes
|
|
|
|
# Include the source attribute when copying?
|
|
if and_source:
|
|
filter_fun = self.is_not_list_attribute
|
|
else:
|
|
filter_fun = self.is_not_known_attribute
|
|
|
|
# Copy the basic attributes
|
|
self.update_basic_atts(dict_)
|
|
|
|
# Grab other attributes in dict_ not in self except the
|
|
# (All basic attributes should be copied already)
|
|
for att in filter(filter_fun, dict_):
|
|
update_fun(self, att, dict_[att], replace)
|
|
|
|
def update_all_atts_consistantly(self, dict_, replace = True,
|
|
and_source = False):
|
|
"""
|
|
Updates all attributes from node or dictionary `dict_`.
|
|
|
|
Appends the basic attributes ('ids', 'names', 'classes',
|
|
'dupnames', but not 'source') and then, for all other attributes in
|
|
dict_, updates the same attribute in self. When attributes with the
|
|
same identifier appear in both self and dict_ and replace is True, the
|
|
values in self are replaced with the values in dict_; otherwise, the
|
|
values in self are preserved. When and_source is True, the 'source'
|
|
attribute is included in the copy.
|
|
|
|
NOTE: When replace is False, and self contains a 'source' attribute,
|
|
'source' is not replaced even when dict_ has a 'source'
|
|
attribute, though it may still be merged into a list depending
|
|
on the value of update_fun.
|
|
"""
|
|
self.update_all_atts(dict_, Element.copy_attr_consistent, replace,
|
|
and_source)
|
|
|
|
def update_all_atts_concatenating(self, dict_, replace = True,
|
|
and_source = False):
|
|
"""
|
|
Updates all attributes from node or dictionary `dict_`.
|
|
|
|
Appends the basic attributes ('ids', 'names', 'classes',
|
|
'dupnames', but not 'source') and then, for all other attributes in
|
|
dict_, updates the same attribute in self. When attributes with the
|
|
same identifier appear in both self and dict_ whose values aren't each
|
|
lists and replace is True, the values in self are replaced with the
|
|
values in dict_; if the values from self and dict_ for the given
|
|
identifier are both of list type, then the two lists are concatenated
|
|
and the result stored in self; otherwise, the values in self are
|
|
preserved. When and_source is True, the 'source' attribute is
|
|
included in the copy.
|
|
|
|
NOTE: When replace is False, and self contains a 'source' attribute,
|
|
'source' is not replaced even when dict_ has a 'source'
|
|
attribute, though it may still be merged into a list depending
|
|
on the value of update_fun.
|
|
"""
|
|
self.update_all_atts(dict_, Element.copy_attr_concatenate, replace,
|
|
and_source)
|
|
|
|
def update_all_atts_coercion(self, dict_, replace = True,
|
|
and_source = False):
|
|
"""
|
|
Updates all attributes from node or dictionary `dict_`.
|
|
|
|
Appends the basic attributes ('ids', 'names', 'classes',
|
|
'dupnames', but not 'source') and then, for all other attributes in
|
|
dict_, updates the same attribute in self. When attributes with the
|
|
same identifier appear in both self and dict_ whose values are both
|
|
not lists and replace is True, the values in self are replaced with
|
|
the values in dict_; if either of the values from self and dict_ for
|
|
the given identifier are of list type, then first any non-lists are
|
|
converted to 1-element lists and then the two lists are concatenated
|
|
and the result stored in self; otherwise, the values in self are
|
|
preserved. When and_source is True, the 'source' attribute is
|
|
included in the copy.
|
|
|
|
NOTE: When replace is False, and self contains a 'source' attribute,
|
|
'source' is not replaced even when dict_ has a 'source'
|
|
attribute, though it may still be merged into a list depending
|
|
on the value of update_fun.
|
|
"""
|
|
self.update_all_atts(dict_, Element.copy_attr_coerce, replace,
|
|
and_source)
|
|
|
|
def update_all_atts_convert(self, dict_, and_source = False):
|
|
"""
|
|
Updates all attributes from node or dictionary `dict_`.
|
|
|
|
Appends the basic attributes ('ids', 'names', 'classes',
|
|
'dupnames', but not 'source') and then, for all other attributes in
|
|
dict_, updates the same attribute in self. When attributes with the
|
|
same identifier appear in both self and dict_ then first any non-lists
|
|
are converted to 1-element lists and then the two lists are
|
|
concatenated and the result stored in self; otherwise, the values in
|
|
self are preserved. When and_source is True, the 'source' attribute
|
|
is included in the copy.
|
|
|
|
NOTE: When replace is False, and self contains a 'source' attribute,
|
|
'source' is not replaced even when dict_ has a 'source'
|
|
attribute, though it may still be merged into a list depending
|
|
on the value of update_fun.
|
|
"""
|
|
self.update_all_atts(dict_, Element.copy_attr_convert,
|
|
and_source = and_source)
|
|
|
|
def clear(self):
|
|
self.children = []
|
|
|
|
def replace(self, old, new):
|
|
"""Replace one child `Node` with another child or children."""
|
|
index = self.index(old)
|
|
if isinstance(new, Node):
|
|
self.setup_child(new)
|
|
self[index] = new
|
|
elif new is not None:
|
|
self[index:index+1] = new
|
|
|
|
def replace_self(self, new):
|
|
"""
|
|
Replace `self` node with `new`, where `new` is a node or a
|
|
list of nodes.
|
|
"""
|
|
update = new
|
|
if not isinstance(new, Node):
|
|
# `new` is a list; update first child.
|
|
try:
|
|
update = new[0]
|
|
except IndexError:
|
|
update = None
|
|
if isinstance(update, Element):
|
|
update.update_basic_atts(self)
|
|
else:
|
|
# `update` is a Text node or `new` is an empty list.
|
|
# Assert that we aren't losing any attributes.
|
|
for att in self.basic_attributes:
|
|
assert not self[att], \
|
|
'Losing "%s" attribute: %s' % (att, self[att])
|
|
self.parent.replace(self, new)
|
|
|
|
def first_child_matching_class(self, childclass, start=0, end=sys.maxsize):
|
|
"""
|
|
Return the index of the first child whose class exactly matches.
|
|
|
|
Parameters:
|
|
|
|
- `childclass`: A `Node` subclass to search for, or a tuple of `Node`
|
|
classes. If a tuple, any of the classes may match.
|
|
- `start`: Initial index to check.
|
|
- `end`: Initial index to *not* check.
|
|
"""
|
|
if not isinstance(childclass, tuple):
|
|
childclass = (childclass,)
|
|
for index in range(start, min(len(self), end)):
|
|
for c in childclass:
|
|
if isinstance(self[index], c):
|
|
return index
|
|
return None
|
|
|
|
def first_child_not_matching_class(self, childclass, start=0,
|
|
end=sys.maxsize):
|
|
"""
|
|
Return the index of the first child whose class does *not* match.
|
|
|
|
Parameters:
|
|
|
|
- `childclass`: A `Node` subclass to skip, or a tuple of `Node`
|
|
classes. If a tuple, none of the classes may match.
|
|
- `start`: Initial index to check.
|
|
- `end`: Initial index to *not* check.
|
|
"""
|
|
if not isinstance(childclass, tuple):
|
|
childclass = (childclass,)
|
|
for index in range(start, min(len(self), end)):
|
|
for c in childclass:
|
|
if isinstance(self.children[index], c):
|
|
break
|
|
else:
|
|
return index
|
|
return None
|
|
|
|
def pformat(self, indent=' ', level=0):
|
|
return ''.join(['%s%s\n' % (indent * level, self.starttag())] +
|
|
[child.pformat(indent, level+1)
|
|
for child in self.children])
|
|
|
|
def copy(self):
|
|
obj = self.__class__(rawsource=self.rawsource, **self.attributes)
|
|
obj.document = self.document
|
|
obj.source = self.source
|
|
obj.line = self.line
|
|
return obj
|
|
|
|
def deepcopy(self):
|
|
copy = self.copy()
|
|
copy.extend([child.deepcopy() for child in self.children])
|
|
return copy
|
|
|
|
def set_class(self, name):
|
|
"""Add a new class to the "classes" attribute."""
|
|
warnings.warn('docutils.nodes.Element.set_class deprecated; '
|
|
"append to Element['classes'] list attribute directly",
|
|
DeprecationWarning, stacklevel=2)
|
|
assert ' ' not in name
|
|
self['classes'].append(name.lower())
|
|
|
|
def note_referenced_by(self, name=None, id=None):
|
|
"""Note that this Element has been referenced by its name
|
|
`name` or id `id`."""
|
|
self.referenced = 1
|
|
# Element.expect_referenced_by_* dictionaries map names or ids
|
|
# to nodes whose ``referenced`` attribute is set to true as
|
|
# soon as this node is referenced by the given name or id.
|
|
# Needed for target propagation.
|
|
by_name = getattr(self, 'expect_referenced_by_name', {}).get(name)
|
|
by_id = getattr(self, 'expect_referenced_by_id', {}).get(id)
|
|
if by_name:
|
|
assert name is not None
|
|
by_name.referenced = 1
|
|
if by_id:
|
|
assert id is not None
|
|
by_id.referenced = 1
|
|
|
|
@classmethod
|
|
def is_not_list_attribute(cls, attr):
|
|
"""
|
|
Returns True if and only if the given attribute is NOT one of the
|
|
basic list attributes defined for all Elements.
|
|
"""
|
|
return attr not in cls.list_attributes
|
|
|
|
@classmethod
|
|
def is_not_known_attribute(cls, attr):
|
|
"""
|
|
Returns True if and only if the given attribute is NOT recognized by
|
|
this class.
|
|
"""
|
|
return attr not in cls.known_attributes
|
|
|
|
|
|
class TextElement(Element):
|
|
|
|
"""
|
|
An element which directly contains text.
|
|
|
|
Its children are all `Text` or `Inline` subclass nodes. You can
|
|
check whether an element's context is inline simply by checking whether
|
|
its immediate parent is a `TextElement` instance (including subclasses).
|
|
This is handy for nodes like `image` that can appear both inline and as
|
|
standalone body elements.
|
|
|
|
If passing children to `__init__()`, make sure to set `text` to
|
|
``''`` or some other suitable value.
|
|
"""
|
|
|
|
child_text_separator = ''
|
|
"""Separator for child nodes, used by `astext()` method."""
|
|
|
|
def __init__(self, rawsource='', text='', *children, **attributes):
|
|
if text != '':
|
|
textnode = Text(text)
|
|
Element.__init__(self, rawsource, textnode, *children,
|
|
**attributes)
|
|
else:
|
|
Element.__init__(self, rawsource, *children, **attributes)
|
|
|
|
|
|
class FixedTextElement(TextElement):
|
|
|
|
"""An element which directly contains preformatted text."""
|
|
|
|
def __init__(self, rawsource='', text='', *children, **attributes):
|
|
TextElement.__init__(self, rawsource, text, *children, **attributes)
|
|
self.attributes['xml:space'] = 'preserve'
|
|
|
|
|
|
# ========
|
|
# Mixins
|
|
# ========
|
|
|
|
class Resolvable(object):
|
|
|
|
resolved = 0
|
|
|
|
|
|
class BackLinkable(object):
|
|
|
|
def add_backref(self, refid):
|
|
self['backrefs'].append(refid)
|
|
|
|
|
|
# ====================
|
|
# Element Categories
|
|
# ====================
|
|
|
|
class Root(object):
|
|
pass
|
|
|
|
|
|
class Titular(object):
|
|
pass
|
|
|
|
|
|
class PreBibliographic(object):
|
|
"""Category of Node which may occur before Bibliographic Nodes."""
|
|
|
|
|
|
class Bibliographic(object):
|
|
pass
|
|
|
|
|
|
class Decorative(PreBibliographic):
|
|
pass
|
|
|
|
|
|
class Structural(object):
|
|
pass
|
|
|
|
|
|
class Body(object):
|
|
pass
|
|
|
|
|
|
class General(Body):
|
|
pass
|
|
|
|
|
|
class Sequential(Body):
|
|
"""List-like elements."""
|
|
|
|
|
|
class Admonition(Body): pass
|
|
|
|
|
|
class Special(Body):
|
|
"""Special internal body elements."""
|
|
|
|
|
|
class Invisible(PreBibliographic):
|
|
"""Internal elements that don't appear in output."""
|
|
|
|
|
|
class Part(object):
|
|
pass
|
|
|
|
|
|
class Inline(object):
|
|
pass
|
|
|
|
|
|
class Referential(Resolvable):
|
|
pass
|
|
|
|
|
|
class Targetable(Resolvable):
|
|
|
|
referenced = 0
|
|
|
|
indirect_reference_name = None
|
|
"""Holds the whitespace_normalized_name (contains mixed case) of a target.
|
|
Required for MoinMoin/reST compatibility."""
|
|
|
|
|
|
class Labeled(object):
|
|
"""Contains a `label` as its first element."""
|
|
|
|
|
|
# ==============
|
|
# Root Element
|
|
# ==============
|
|
|
|
class document(Root, Structural, Element):
|
|
|
|
"""
|
|
The document root element.
|
|
|
|
Do not instantiate this class directly; use
|
|
`docutils.utils.new_document()` instead.
|
|
"""
|
|
|
|
def __init__(self, settings, reporter, *args, **kwargs):
|
|
Element.__init__(self, *args, **kwargs)
|
|
|
|
self.current_source = None
|
|
"""Path to or description of the input source being processed."""
|
|
|
|
self.current_line = None
|
|
"""Line number (1-based) of `current_source`."""
|
|
|
|
self.settings = settings
|
|
"""Runtime settings data record."""
|
|
|
|
self.reporter = reporter
|
|
"""System message generator."""
|
|
|
|
self.indirect_targets = []
|
|
"""List of indirect target nodes."""
|
|
|
|
self.substitution_defs = {}
|
|
"""Mapping of substitution names to substitution_definition nodes."""
|
|
|
|
self.substitution_names = {}
|
|
"""Mapping of case-normalized substitution names to case-sensitive
|
|
names."""
|
|
|
|
self.refnames = {}
|
|
"""Mapping of names to lists of referencing nodes."""
|
|
|
|
self.refids = {}
|
|
"""Mapping of ids to lists of referencing nodes."""
|
|
|
|
self.nameids = {}
|
|
"""Mapping of names to unique id's."""
|
|
|
|
self.nametypes = {}
|
|
"""Mapping of names to hyperlink type (boolean: True => explicit,
|
|
False => implicit."""
|
|
|
|
self.ids = {}
|
|
"""Mapping of ids to nodes."""
|
|
|
|
self.footnote_refs = {}
|
|
"""Mapping of footnote labels to lists of footnote_reference nodes."""
|
|
|
|
self.citation_refs = {}
|
|
"""Mapping of citation labels to lists of citation_reference nodes."""
|
|
|
|
self.autofootnotes = []
|
|
"""List of auto-numbered footnote nodes."""
|
|
|
|
self.autofootnote_refs = []
|
|
"""List of auto-numbered footnote_reference nodes."""
|
|
|
|
self.symbol_footnotes = []
|
|
"""List of symbol footnote nodes."""
|
|
|
|
self.symbol_footnote_refs = []
|
|
"""List of symbol footnote_reference nodes."""
|
|
|
|
self.footnotes = []
|
|
"""List of manually-numbered footnote nodes."""
|
|
|
|
self.citations = []
|
|
"""List of citation nodes."""
|
|
|
|
self.autofootnote_start = 1
|
|
"""Initial auto-numbered footnote number."""
|
|
|
|
self.symbol_footnote_start = 0
|
|
"""Initial symbol footnote symbol index."""
|
|
|
|
self.id_counter = Counter()
|
|
"""Numbers added to otherwise identical IDs."""
|
|
|
|
self.parse_messages = []
|
|
"""System messages generated while parsing."""
|
|
|
|
self.transform_messages = []
|
|
"""System messages generated while applying transforms."""
|
|
|
|
import docutils.transforms
|
|
self.transformer = docutils.transforms.Transformer(self)
|
|
"""Storage for transforms to be applied to this document."""
|
|
|
|
self.decoration = None
|
|
"""Document's `decoration` node."""
|
|
|
|
self.document = self
|
|
|
|
def __getstate__(self):
|
|
"""
|
|
Return dict with unpicklable references removed.
|
|
"""
|
|
state = self.__dict__.copy()
|
|
state['reporter'] = None
|
|
state['transformer'] = None
|
|
return state
|
|
|
|
def asdom(self, dom=None):
|
|
"""Return a DOM representation of this document."""
|
|
if dom is None:
|
|
import xml.dom.minidom as dom
|
|
domroot = dom.Document()
|
|
domroot.appendChild(self._dom_node(domroot))
|
|
return domroot
|
|
|
|
def set_id(self, node, msgnode=None, suggested_prefix=''):
|
|
for id in node['ids']:
|
|
if id in self.ids and self.ids[id] is not node:
|
|
msg = self.reporter.severe('Duplicate ID: "%s".' % id)
|
|
if msgnode != None:
|
|
msgnode += msg
|
|
if not node['ids']:
|
|
id_prefix = self.settings.id_prefix
|
|
auto_id_prefix = self.settings.auto_id_prefix
|
|
base_id = ''
|
|
id = ''
|
|
for name in node['names']:
|
|
base_id = make_id(name)
|
|
id = id_prefix + base_id
|
|
# TODO: allow names starting with numbers if `id_prefix`
|
|
# is non-empty: id = make_id(id_prefix + name)
|
|
if base_id and id not in self.ids:
|
|
break
|
|
else:
|
|
if base_id and auto_id_prefix.endswith('%'):
|
|
# disambiguate name-derived ID
|
|
# TODO: remove second condition after announcing change
|
|
prefix = id + '-'
|
|
else:
|
|
prefix = id_prefix + auto_id_prefix
|
|
if prefix.endswith('%'):
|
|
prefix = '%s%s-' % (prefix[:-1], suggested_prefix
|
|
or make_id(node.tagname))
|
|
while True:
|
|
self.id_counter[prefix] += 1
|
|
id = '%s%d' % (prefix, self.id_counter[prefix])
|
|
if id not in self.ids:
|
|
break
|
|
node['ids'].append(id)
|
|
self.ids[id] = node
|
|
return id
|
|
|
|
def set_name_id_map(self, node, id, msgnode=None, explicit=None):
|
|
"""
|
|
`self.nameids` maps names to IDs, while `self.nametypes` maps names to
|
|
booleans representing hyperlink type (True==explicit,
|
|
False==implicit). This method updates the mappings.
|
|
|
|
The following state transition table shows how `self.nameids` ("ids")
|
|
and `self.nametypes` ("types") change with new input (a call to this
|
|
method), and what actions are performed ("implicit"-type system
|
|
messages are INFO/1, and "explicit"-type system messages are ERROR/3):
|
|
|
|
==== ===== ======== ======== ======= ==== ===== =====
|
|
Old State Input Action New State Notes
|
|
----------- -------- ----------------- ----------- -----
|
|
ids types new type sys.msg. dupname ids types
|
|
==== ===== ======== ======== ======= ==== ===== =====
|
|
- - explicit - - new True
|
|
- - implicit - - new False
|
|
None False explicit - - new True
|
|
old False explicit implicit old new True
|
|
None True explicit explicit new None True
|
|
old True explicit explicit new,old None True [#]_
|
|
None False implicit implicit new None False
|
|
old False implicit implicit new,old None False
|
|
None True implicit implicit new None True
|
|
old True implicit implicit new old True
|
|
==== ===== ======== ======== ======= ==== ===== =====
|
|
|
|
.. [#] Do not clear the name-to-id map or invalidate the old target if
|
|
both old and new targets are external and refer to identical URIs.
|
|
The new target is invalidated regardless.
|
|
"""
|
|
for name in node['names']:
|
|
if name in self.nameids:
|
|
self.set_duplicate_name_id(node, id, name, msgnode, explicit)
|
|
else:
|
|
self.nameids[name] = id
|
|
self.nametypes[name] = explicit
|
|
|
|
def set_duplicate_name_id(self, node, id, name, msgnode, explicit):
|
|
old_id = self.nameids[name]
|
|
old_explicit = self.nametypes[name]
|
|
self.nametypes[name] = old_explicit or explicit
|
|
if explicit:
|
|
if old_explicit:
|
|
level = 2
|
|
if old_id is not None:
|
|
old_node = self.ids[old_id]
|
|
if 'refuri' in node:
|
|
refuri = node['refuri']
|
|
if old_node['names'] \
|
|
and 'refuri' in old_node \
|
|
and old_node['refuri'] == refuri:
|
|
level = 1 # just inform if refuri's identical
|
|
if level > 1:
|
|
dupname(old_node, name)
|
|
self.nameids[name] = None
|
|
msg = self.reporter.system_message(
|
|
level, 'Duplicate explicit target name: "%s".' % name,
|
|
backrefs=[id], base_node=node)
|
|
if msgnode != None:
|
|
msgnode += msg
|
|
dupname(node, name)
|
|
else:
|
|
self.nameids[name] = id
|
|
if old_id is not None:
|
|
old_node = self.ids[old_id]
|
|
dupname(old_node, name)
|
|
else:
|
|
if old_id is not None and not old_explicit:
|
|
self.nameids[name] = None
|
|
old_node = self.ids[old_id]
|
|
dupname(old_node, name)
|
|
dupname(node, name)
|
|
if not explicit or (not old_explicit and old_id is not None):
|
|
msg = self.reporter.info(
|
|
'Duplicate implicit target name: "%s".' % name,
|
|
backrefs=[id], base_node=node)
|
|
if msgnode != None:
|
|
msgnode += msg
|
|
|
|
def has_name(self, name):
|
|
return name in self.nameids
|
|
|
|
# "note" here is an imperative verb: "take note of".
|
|
def note_implicit_target(self, target, msgnode=None):
|
|
id = self.set_id(target, msgnode)
|
|
self.set_name_id_map(target, id, msgnode, explicit=None)
|
|
|
|
def note_explicit_target(self, target, msgnode=None):
|
|
id = self.set_id(target, msgnode)
|
|
self.set_name_id_map(target, id, msgnode, explicit=True)
|
|
|
|
def note_refname(self, node):
|
|
self.refnames.setdefault(node['refname'], []).append(node)
|
|
|
|
def note_refid(self, node):
|
|
self.refids.setdefault(node['refid'], []).append(node)
|
|
|
|
def note_indirect_target(self, target):
|
|
self.indirect_targets.append(target)
|
|
if target['names']:
|
|
self.note_refname(target)
|
|
|
|
def note_anonymous_target(self, target):
|
|
self.set_id(target)
|
|
|
|
def note_autofootnote(self, footnote):
|
|
self.set_id(footnote)
|
|
self.autofootnotes.append(footnote)
|
|
|
|
def note_autofootnote_ref(self, ref):
|
|
self.set_id(ref)
|
|
self.autofootnote_refs.append(ref)
|
|
|
|
def note_symbol_footnote(self, footnote):
|
|
self.set_id(footnote)
|
|
self.symbol_footnotes.append(footnote)
|
|
|
|
def note_symbol_footnote_ref(self, ref):
|
|
self.set_id(ref)
|
|
self.symbol_footnote_refs.append(ref)
|
|
|
|
def note_footnote(self, footnote):
|
|
self.set_id(footnote)
|
|
self.footnotes.append(footnote)
|
|
|
|
def note_footnote_ref(self, ref):
|
|
self.set_id(ref)
|
|
self.footnote_refs.setdefault(ref['refname'], []).append(ref)
|
|
self.note_refname(ref)
|
|
|
|
def note_citation(self, citation):
|
|
self.citations.append(citation)
|
|
|
|
def note_citation_ref(self, ref):
|
|
self.set_id(ref)
|
|
self.citation_refs.setdefault(ref['refname'], []).append(ref)
|
|
self.note_refname(ref)
|
|
|
|
def note_substitution_def(self, subdef, def_name, msgnode=None):
|
|
name = whitespace_normalize_name(def_name)
|
|
if name in self.substitution_defs:
|
|
msg = self.reporter.error(
|
|
'Duplicate substitution definition name: "%s".' % name,
|
|
base_node=subdef)
|
|
if msgnode != None:
|
|
msgnode += msg
|
|
oldnode = self.substitution_defs[name]
|
|
dupname(oldnode, name)
|
|
# keep only the last definition:
|
|
self.substitution_defs[name] = subdef
|
|
# case-insensitive mapping:
|
|
self.substitution_names[fully_normalize_name(name)] = name
|
|
|
|
def note_substitution_ref(self, subref, refname):
|
|
subref['refname'] = whitespace_normalize_name(refname)
|
|
|
|
def note_pending(self, pending, priority=None):
|
|
self.transformer.add_pending(pending, priority)
|
|
|
|
def note_parse_message(self, message):
|
|
self.parse_messages.append(message)
|
|
|
|
def note_transform_message(self, message):
|
|
self.transform_messages.append(message)
|
|
|
|
def note_source(self, source, offset):
|
|
self.current_source = source
|
|
if offset is None:
|
|
self.current_line = offset
|
|
else:
|
|
self.current_line = offset + 1
|
|
|
|
def copy(self):
|
|
obj = self.__class__(self.settings, self.reporter,
|
|
**self.attributes)
|
|
obj.source = self.source
|
|
obj.line = self.line
|
|
return obj
|
|
|
|
def get_decoration(self):
|
|
if not self.decoration:
|
|
self.decoration = decoration()
|
|
index = self.first_child_not_matching_class(Titular)
|
|
if index is None:
|
|
self.append(self.decoration)
|
|
else:
|
|
self.insert(index, self.decoration)
|
|
return self.decoration
|
|
|
|
|
|
# ================
|
|
# Title Elements
|
|
# ================
|
|
|
|
class title(Titular, PreBibliographic, TextElement): pass
|
|
class subtitle(Titular, PreBibliographic, TextElement): pass
|
|
class rubric(Titular, TextElement): pass
|
|
|
|
|
|
# ========================
|
|
# Bibliographic Elements
|
|
# ========================
|
|
|
|
class docinfo(Bibliographic, Element): pass
|
|
class author(Bibliographic, TextElement): pass
|
|
class authors(Bibliographic, Element): pass
|
|
class organization(Bibliographic, TextElement): pass
|
|
class address(Bibliographic, FixedTextElement): pass
|
|
class contact(Bibliographic, TextElement): pass
|
|
class version(Bibliographic, TextElement): pass
|
|
class revision(Bibliographic, TextElement): pass
|
|
class status(Bibliographic, TextElement): pass
|
|
class date(Bibliographic, TextElement): pass
|
|
class copyright(Bibliographic, TextElement): pass
|
|
|
|
|
|
# =====================
|
|
# Decorative Elements
|
|
# =====================
|
|
|
|
class decoration(Decorative, Element):
|
|
|
|
def get_header(self):
|
|
if not len(self.children) or not isinstance(self.children[0], header):
|
|
self.insert(0, header())
|
|
return self.children[0]
|
|
|
|
def get_footer(self):
|
|
if not len(self.children) or not isinstance(self.children[-1], footer):
|
|
self.append(footer())
|
|
return self.children[-1]
|
|
|
|
|
|
class header(Decorative, Element): pass
|
|
class footer(Decorative, Element): pass
|
|
|
|
|
|
# =====================
|
|
# Structural Elements
|
|
# =====================
|
|
|
|
class section(Structural, Element): pass
|
|
|
|
|
|
class topic(Structural, Element):
|
|
|
|
"""
|
|
Topics are terminal, "leaf" mini-sections, like block quotes with titles,
|
|
or textual figures. A topic is just like a section, except that it has no
|
|
subsections, and it doesn't have to conform to section placement rules.
|
|
|
|
Topics are allowed wherever body elements (list, table, etc.) are allowed,
|
|
but only at the top level of a section or document. Topics cannot nest
|
|
inside topics, sidebars, or body elements; you can't have a topic inside a
|
|
table, list, block quote, etc.
|
|
"""
|
|
|
|
|
|
class sidebar(Structural, Element):
|
|
|
|
"""
|
|
Sidebars are like miniature, parallel documents that occur inside other
|
|
documents, providing related or reference material. A sidebar is
|
|
typically offset by a border and "floats" to the side of the page; the
|
|
document's main text may flow around it. Sidebars can also be likened to
|
|
super-footnotes; their content is outside of the flow of the document's
|
|
main text.
|
|
|
|
Sidebars are allowed wherever body elements (list, table, etc.) are
|
|
allowed, but only at the top level of a section or document. Sidebars
|
|
cannot nest inside sidebars, topics, or body elements; you can't have a
|
|
sidebar inside a table, list, block quote, etc.
|
|
"""
|
|
|
|
|
|
class transition(Structural, Element): pass
|
|
|
|
|
|
# ===============
|
|
# Body Elements
|
|
# ===============
|
|
|
|
class paragraph(General, TextElement): pass
|
|
class compound(General, Element): pass
|
|
class container(General, Element): pass
|
|
class bullet_list(Sequential, Element): pass
|
|
class enumerated_list(Sequential, Element): pass
|
|
class list_item(Part, Element): pass
|
|
class definition_list(Sequential, Element): pass
|
|
class definition_list_item(Part, Element): pass
|
|
class term(Part, TextElement): pass
|
|
class classifier(Part, TextElement): pass
|
|
class definition(Part, Element): pass
|
|
class field_list(Sequential, Element): pass
|
|
class field(Part, Element): pass
|
|
class field_name(Part, TextElement): pass
|
|
class field_body(Part, Element): pass
|
|
|
|
|
|
class option(Part, Element):
|
|
|
|
child_text_separator = ''
|
|
|
|
|
|
class option_argument(Part, TextElement):
|
|
|
|
def astext(self):
|
|
return self.get('delimiter', ' ') + TextElement.astext(self)
|
|
|
|
|
|
class option_group(Part, Element):
|
|
|
|
child_text_separator = ', '
|
|
|
|
|
|
class option_list(Sequential, Element): pass
|
|
|
|
|
|
class option_list_item(Part, Element):
|
|
|
|
child_text_separator = ' '
|
|
|
|
|
|
class option_string(Part, TextElement): pass
|
|
class description(Part, Element): pass
|
|
class literal_block(General, FixedTextElement): pass
|
|
class doctest_block(General, FixedTextElement): pass
|
|
class math_block(General, FixedTextElement): pass
|
|
class line_block(General, Element): pass
|
|
|
|
|
|
class line(Part, TextElement):
|
|
|
|
indent = None
|
|
|
|
|
|
class block_quote(General, Element): pass
|
|
class attribution(Part, TextElement): pass
|
|
class attention(Admonition, Element): pass
|
|
class caution(Admonition, Element): pass
|
|
class danger(Admonition, Element): pass
|
|
class error(Admonition, Element): pass
|
|
class important(Admonition, Element): pass
|
|
class note(Admonition, Element): pass
|
|
class tip(Admonition, Element): pass
|
|
class hint(Admonition, Element): pass
|
|
class warning(Admonition, Element): pass
|
|
class admonition(Admonition, Element): pass
|
|
class comment(Special, Invisible, FixedTextElement): pass
|
|
class substitution_definition(Special, Invisible, TextElement): pass
|
|
class target(Special, Invisible, Inline, TextElement, Targetable): pass
|
|
class footnote(General, BackLinkable, Element, Labeled, Targetable): pass
|
|
class citation(General, BackLinkable, Element, Labeled, Targetable): pass
|
|
class label(Part, TextElement): pass
|
|
class figure(General, Element): pass
|
|
class caption(Part, TextElement): pass
|
|
class legend(Part, Element): pass
|
|
class table(General, Element): pass
|
|
class tgroup(Part, Element): pass
|
|
class colspec(Part, Element): pass
|
|
class thead(Part, Element): pass
|
|
class tbody(Part, Element): pass
|
|
class row(Part, Element): pass
|
|
class entry(Part, Element): pass
|
|
|
|
|
|
class system_message(Special, BackLinkable, PreBibliographic, Element):
|
|
|
|
"""
|
|
System message element.
|
|
|
|
Do not instantiate this class directly; use
|
|
``document.reporter.info/warning/error/severe()`` instead.
|
|
"""
|
|
|
|
def __init__(self, message=None, *children, **attributes):
|
|
rawsource = attributes.get('rawsource', '')
|
|
if message:
|
|
p = paragraph('', message)
|
|
children = (p,) + children
|
|
try:
|
|
Element.__init__(self, rawsource, *children, **attributes)
|
|
except:
|
|
print('system_message: children=%r' % (children,))
|
|
raise
|
|
|
|
def astext(self):
|
|
line = self.get('line', '')
|
|
return u'%s:%s: (%s/%s) %s' % (self['source'], line, self['type'],
|
|
self['level'], Element.astext(self))
|
|
|
|
|
|
class pending(Special, Invisible, Element):
|
|
|
|
"""
|
|
The "pending" element is used to encapsulate a pending operation: the
|
|
operation (transform), the point at which to apply it, and any data it
|
|
requires. Only the pending operation's location within the document is
|
|
stored in the public document tree (by the "pending" object itself); the
|
|
operation and its data are stored in the "pending" object's internal
|
|
instance attributes.
|
|
|
|
For example, say you want a table of contents in your reStructuredText
|
|
document. The easiest way to specify where to put it is from within the
|
|
document, with a directive::
|
|
|
|
.. contents::
|
|
|
|
But the "contents" directive can't do its work until the entire document
|
|
has been parsed and possibly transformed to some extent. So the directive
|
|
code leaves a placeholder behind that will trigger the second phase of its
|
|
processing, something like this::
|
|
|
|
<pending ...public attributes...> + internal attributes
|
|
|
|
Use `document.note_pending()` so that the
|
|
`docutils.transforms.Transformer` stage of processing can run all pending
|
|
transforms.
|
|
"""
|
|
|
|
def __init__(self, transform, details=None,
|
|
rawsource='', *children, **attributes):
|
|
Element.__init__(self, rawsource, *children, **attributes)
|
|
|
|
self.transform = transform
|
|
"""The `docutils.transforms.Transform` class implementing the pending
|
|
operation."""
|
|
|
|
self.details = details or {}
|
|
"""Detail data (dictionary) required by the pending operation."""
|
|
|
|
def pformat(self, indent=' ', level=0):
|
|
internals = [
|
|
'.. internal attributes:',
|
|
' .transform: %s.%s' % (self.transform.__module__,
|
|
self.transform.__name__),
|
|
' .details:']
|
|
details = sorted(self.details.items())
|
|
for key, value in details:
|
|
if isinstance(value, Node):
|
|
internals.append('%7s%s:' % ('', key))
|
|
internals.extend(['%9s%s' % ('', line)
|
|
for line in value.pformat().splitlines()])
|
|
elif value and isinstance(value, list) \
|
|
and isinstance(value[0], Node):
|
|
internals.append('%7s%s:' % ('', key))
|
|
for v in value:
|
|
internals.extend(['%9s%s' % ('', line)
|
|
for line in v.pformat().splitlines()])
|
|
else:
|
|
internals.append('%7s%s: %r' % ('', key, value))
|
|
return (Element.pformat(self, indent, level)
|
|
+ ''.join([(' %s%s\n' % (indent * level, line))
|
|
for line in internals]))
|
|
|
|
def copy(self):
|
|
obj = self.__class__(self.transform, self.details, self.rawsource,
|
|
**self.attributes)
|
|
obj.document = self.document
|
|
obj.source = self.source
|
|
obj.line = self.line
|
|
return obj
|
|
|
|
|
|
class raw(Special, Inline, PreBibliographic, FixedTextElement):
|
|
|
|
"""
|
|
Raw data that is to be passed untouched to the Writer.
|
|
"""
|
|
|
|
pass
|
|
|
|
|
|
# =================
|
|
# Inline Elements
|
|
# =================
|
|
|
|
class emphasis(Inline, TextElement): pass
|
|
class strong(Inline, TextElement): pass
|
|
class literal(Inline, TextElement): pass
|
|
class reference(General, Inline, Referential, TextElement): pass
|
|
class footnote_reference(Inline, Referential, TextElement): pass
|
|
class citation_reference(Inline, Referential, TextElement): pass
|
|
class substitution_reference(Inline, TextElement): pass
|
|
class title_reference(Inline, TextElement): pass
|
|
class abbreviation(Inline, TextElement): pass
|
|
class acronym(Inline, TextElement): pass
|
|
class superscript(Inline, TextElement): pass
|
|
class subscript(Inline, TextElement): pass
|
|
class math(Inline, TextElement): pass
|
|
|
|
|
|
class image(General, Inline, Element):
|
|
|
|
def astext(self):
|
|
return self.get('alt', '')
|
|
|
|
|
|
class inline(Inline, TextElement): pass
|
|
class problematic(Inline, TextElement): pass
|
|
class generated(Inline, TextElement): pass
|
|
|
|
|
|
# ========================================
|
|
# Auxiliary Classes, Functions, and Data
|
|
# ========================================
|
|
|
|
node_class_names = """
|
|
Text
|
|
abbreviation acronym address admonition attention attribution author
|
|
authors
|
|
block_quote bullet_list
|
|
caption caution citation citation_reference classifier colspec comment
|
|
compound contact container copyright
|
|
danger date decoration definition definition_list definition_list_item
|
|
description docinfo doctest_block document
|
|
emphasis entry enumerated_list error
|
|
field field_body field_list field_name figure footer
|
|
footnote footnote_reference
|
|
generated
|
|
header hint
|
|
image important inline
|
|
label legend line line_block list_item literal literal_block
|
|
math math_block
|
|
note
|
|
option option_argument option_group option_list option_list_item
|
|
option_string organization
|
|
paragraph pending problematic
|
|
raw reference revision row rubric
|
|
section sidebar status strong subscript substitution_definition
|
|
substitution_reference subtitle superscript system_message
|
|
table target tbody term tgroup thead tip title title_reference topic
|
|
transition
|
|
version
|
|
warning""".split()
|
|
"""A list of names of all concrete Node subclasses."""
|
|
|
|
|
|
class NodeVisitor(object):
|
|
|
|
"""
|
|
"Visitor" pattern [GoF95]_ abstract superclass implementation for
|
|
document tree traversals.
|
|
|
|
Each node class has corresponding methods, doing nothing by
|
|
default; override individual methods for specific and useful
|
|
behaviour. The `dispatch_visit()` method is called by
|
|
`Node.walk()` upon entering a node. `Node.walkabout()` also calls
|
|
the `dispatch_departure()` method before exiting a node.
|
|
|
|
The dispatch methods call "``visit_`` + node class name" or
|
|
"``depart_`` + node class name", resp.
|
|
|
|
This is a base class for visitors whose ``visit_...`` & ``depart_...``
|
|
methods should be implemented for *all* node types encountered (such as
|
|
for `docutils.writers.Writer` subclasses). Unimplemented methods will
|
|
raise exceptions.
|
|
|
|
For sparse traversals, where only certain node types are of interest,
|
|
subclass `SparseNodeVisitor` instead. When (mostly or entirely) uniform
|
|
processing is desired, subclass `GenericNodeVisitor`.
|
|
|
|
.. [GoF95] Gamma, Helm, Johnson, Vlissides. *Design Patterns: Elements of
|
|
Reusable Object-Oriented Software*. Addison-Wesley, Reading, MA, USA,
|
|
1995.
|
|
"""
|
|
|
|
optional = ()
|
|
"""
|
|
Tuple containing node class names (as strings).
|
|
|
|
No exception will be raised if writers do not implement visit
|
|
or departure functions for these node classes.
|
|
|
|
Used to ensure transitional compatibility with existing 3rd-party writers.
|
|
"""
|
|
|
|
def __init__(self, document):
|
|
self.document = document
|
|
|
|
def dispatch_visit(self, node):
|
|
"""
|
|
Call self."``visit_`` + node class name" with `node` as
|
|
parameter. If the ``visit_...`` method does not exist, call
|
|
self.unknown_visit.
|
|
"""
|
|
node_name = node.__class__.__name__
|
|
method = getattr(self, 'visit_' + node_name, self.unknown_visit)
|
|
self.document.reporter.debug(
|
|
'docutils.nodes.NodeVisitor.dispatch_visit calling %s for %s'
|
|
% (method.__name__, node_name))
|
|
return method(node)
|
|
|
|
def dispatch_departure(self, node):
|
|
"""
|
|
Call self."``depart_`` + node class name" with `node` as
|
|
parameter. If the ``depart_...`` method does not exist, call
|
|
self.unknown_departure.
|
|
"""
|
|
node_name = node.__class__.__name__
|
|
method = getattr(self, 'depart_' + node_name, self.unknown_departure)
|
|
self.document.reporter.debug(
|
|
'docutils.nodes.NodeVisitor.dispatch_departure calling %s for %s'
|
|
% (method.__name__, node_name))
|
|
return method(node)
|
|
|
|
def unknown_visit(self, node):
|
|
"""
|
|
Called when entering unknown `Node` types.
|
|
|
|
Raise an exception unless overridden.
|
|
"""
|
|
if (self.document.settings.strict_visitor
|
|
or node.__class__.__name__ not in self.optional):
|
|
raise NotImplementedError(
|
|
'%s visiting unknown node type: %s'
|
|
% (self.__class__, node.__class__.__name__))
|
|
|
|
def unknown_departure(self, node):
|
|
"""
|
|
Called before exiting unknown `Node` types.
|
|
|
|
Raise exception unless overridden.
|
|
"""
|
|
if (self.document.settings.strict_visitor
|
|
or node.__class__.__name__ not in self.optional):
|
|
raise NotImplementedError(
|
|
'%s departing unknown node type: %s'
|
|
% (self.__class__, node.__class__.__name__))
|
|
|
|
|
|
class SparseNodeVisitor(NodeVisitor):
|
|
|
|
"""
|
|
Base class for sparse traversals, where only certain node types are of
|
|
interest. When ``visit_...`` & ``depart_...`` methods should be
|
|
implemented for *all* node types (such as for `docutils.writers.Writer`
|
|
subclasses), subclass `NodeVisitor` instead.
|
|
"""
|
|
|
|
|
|
class GenericNodeVisitor(NodeVisitor):
|
|
|
|
"""
|
|
Generic "Visitor" abstract superclass, for simple traversals.
|
|
|
|
Unless overridden, each ``visit_...`` method calls `default_visit()`, and
|
|
each ``depart_...`` method (when using `Node.walkabout()`) calls
|
|
`default_departure()`. `default_visit()` (and `default_departure()`) must
|
|
be overridden in subclasses.
|
|
|
|
Define fully generic visitors by overriding `default_visit()` (and
|
|
`default_departure()`) only. Define semi-generic visitors by overriding
|
|
individual ``visit_...()`` (and ``depart_...()``) methods also.
|
|
|
|
`NodeVisitor.unknown_visit()` (`NodeVisitor.unknown_departure()`) should
|
|
be overridden for default behavior.
|
|
"""
|
|
|
|
def default_visit(self, node):
|
|
"""Override for generic, uniform traversals."""
|
|
raise NotImplementedError
|
|
|
|
def default_departure(self, node):
|
|
"""Override for generic, uniform traversals."""
|
|
raise NotImplementedError
|
|
|
|
def _call_default_visit(self, node):
|
|
self.default_visit(node)
|
|
|
|
def _call_default_departure(self, node):
|
|
self.default_departure(node)
|
|
|
|
def _nop(self, node):
|
|
pass
|
|
|
|
def _add_node_class_names(names):
|
|
"""Save typing with dynamic assignments:"""
|
|
for _name in names:
|
|
setattr(GenericNodeVisitor, "visit_" + _name, _call_default_visit)
|
|
setattr(GenericNodeVisitor, "depart_" + _name, _call_default_departure)
|
|
setattr(SparseNodeVisitor, 'visit_' + _name, _nop)
|
|
setattr(SparseNodeVisitor, 'depart_' + _name, _nop)
|
|
|
|
_add_node_class_names(node_class_names)
|
|
|
|
|
|
class TreeCopyVisitor(GenericNodeVisitor):
|
|
|
|
"""
|
|
Make a complete copy of a tree or branch, including element attributes.
|
|
"""
|
|
|
|
def __init__(self, document):
|
|
GenericNodeVisitor.__init__(self, document)
|
|
self.parent_stack = []
|
|
self.parent = []
|
|
|
|
def get_tree_copy(self):
|
|
return self.parent[0]
|
|
|
|
def default_visit(self, node):
|
|
"""Copy the current node, and make it the new acting parent."""
|
|
newnode = node.copy()
|
|
self.parent.append(newnode)
|
|
self.parent_stack.append(self.parent)
|
|
self.parent = newnode
|
|
|
|
def default_departure(self, node):
|
|
"""Restore the previous acting parent."""
|
|
self.parent = self.parent_stack.pop()
|
|
|
|
|
|
class TreePruningException(Exception):
|
|
|
|
"""
|
|
Base class for `NodeVisitor`-related tree pruning exceptions.
|
|
|
|
Raise subclasses from within ``visit_...`` or ``depart_...`` methods
|
|
called from `Node.walk()` and `Node.walkabout()` tree traversals to prune
|
|
the tree traversed.
|
|
"""
|
|
|
|
pass
|
|
|
|
|
|
class SkipChildren(TreePruningException):
|
|
|
|
"""
|
|
Do not visit any children of the current node. The current node's
|
|
siblings and ``depart_...`` method are not affected.
|
|
"""
|
|
|
|
pass
|
|
|
|
|
|
class SkipSiblings(TreePruningException):
|
|
|
|
"""
|
|
Do not visit any more siblings (to the right) of the current node. The
|
|
current node's children and its ``depart_...`` method are not affected.
|
|
"""
|
|
|
|
pass
|
|
|
|
|
|
class SkipNode(TreePruningException):
|
|
|
|
"""
|
|
Do not visit the current node's children, and do not call the current
|
|
node's ``depart_...`` method.
|
|
"""
|
|
|
|
pass
|
|
|
|
|
|
class SkipDeparture(TreePruningException):
|
|
|
|
"""
|
|
Do not call the current node's ``depart_...`` method. The current node's
|
|
children and siblings are not affected.
|
|
"""
|
|
|
|
pass
|
|
|
|
|
|
class NodeFound(TreePruningException):
|
|
|
|
"""
|
|
Raise to indicate that the target of a search has been found. This
|
|
exception must be caught by the client; it is not caught by the traversal
|
|
code.
|
|
"""
|
|
|
|
pass
|
|
|
|
|
|
class StopTraversal(TreePruningException):
|
|
|
|
"""
|
|
Stop the traversal alltogether. The current node's ``depart_...`` method
|
|
is not affected. The parent nodes ``depart_...`` methods are also called
|
|
as usual. No other nodes are visited. This is an alternative to
|
|
NodeFound that does not cause exception handling to trickle up to the
|
|
caller.
|
|
"""
|
|
|
|
pass
|
|
|
|
|
|
def make_id(string):
|
|
"""
|
|
Convert `string` into an identifier and return it.
|
|
|
|
Docutils identifiers will conform to the regular expression
|
|
``[a-z](-?[a-z0-9]+)*``. For CSS compatibility, identifiers (the "class"
|
|
and "id" attributes) should have no underscores, colons, or periods.
|
|
Hyphens may be used.
|
|
|
|
- The `HTML 4.01 spec`_ defines identifiers based on SGML tokens:
|
|
|
|
ID and NAME tokens must begin with a letter ([A-Za-z]) and may be
|
|
followed by any number of letters, digits ([0-9]), hyphens ("-"),
|
|
underscores ("_"), colons (":"), and periods (".").
|
|
|
|
- However the `CSS1 spec`_ defines identifiers based on the "name" token,
|
|
a tighter interpretation ("flex" tokenizer notation; "latin1" and
|
|
"escape" 8-bit characters have been replaced with entities)::
|
|
|
|
unicode \\[0-9a-f]{1,4}
|
|
latin1 [¡-ÿ]
|
|
escape {unicode}|\\[ -~¡-ÿ]
|
|
nmchar [-a-z0-9]|{latin1}|{escape}
|
|
name {nmchar}+
|
|
|
|
The CSS1 "nmchar" rule does not include underscores ("_"), colons (":"),
|
|
or periods ("."), therefore "class" and "id" attributes should not contain
|
|
these characters. They should be replaced with hyphens ("-"). Combined
|
|
with HTML's requirements (the first character must be a letter; no
|
|
"unicode", "latin1", or "escape" characters), this results in the
|
|
``[a-z](-?[a-z0-9]+)*`` pattern.
|
|
|
|
.. _HTML 4.01 spec: http://www.w3.org/TR/html401
|
|
.. _CSS1 spec: http://www.w3.org/TR/REC-CSS1
|
|
"""
|
|
id = string.lower()
|
|
if not isinstance(id, unicode):
|
|
id = id.decode()
|
|
id = id.translate(_non_id_translate_digraphs)
|
|
id = id.translate(_non_id_translate)
|
|
# get rid of non-ascii characters.
|
|
# 'ascii' lowercase to prevent problems with turkish locale.
|
|
id = unicodedata.normalize('NFKD', id).\
|
|
encode('ascii', 'ignore').decode('ascii')
|
|
# shrink runs of whitespace and replace by hyphen
|
|
id = _non_id_chars.sub('-', ' '.join(id.split()))
|
|
id = _non_id_at_ends.sub('', id)
|
|
return str(id)
|
|
|
|
_non_id_chars = re.compile('[^a-z0-9]+')
|
|
_non_id_at_ends = re.compile('^[-0-9]+|-+$')
|
|
_non_id_translate = {
|
|
0x00f8: u'o', # o with stroke
|
|
0x0111: u'd', # d with stroke
|
|
0x0127: u'h', # h with stroke
|
|
0x0131: u'i', # dotless i
|
|
0x0142: u'l', # l with stroke
|
|
0x0167: u't', # t with stroke
|
|
0x0180: u'b', # b with stroke
|
|
0x0183: u'b', # b with topbar
|
|
0x0188: u'c', # c with hook
|
|
0x018c: u'd', # d with topbar
|
|
0x0192: u'f', # f with hook
|
|
0x0199: u'k', # k with hook
|
|
0x019a: u'l', # l with bar
|
|
0x019e: u'n', # n with long right leg
|
|
0x01a5: u'p', # p with hook
|
|
0x01ab: u't', # t with palatal hook
|
|
0x01ad: u't', # t with hook
|
|
0x01b4: u'y', # y with hook
|
|
0x01b6: u'z', # z with stroke
|
|
0x01e5: u'g', # g with stroke
|
|
0x0225: u'z', # z with hook
|
|
0x0234: u'l', # l with curl
|
|
0x0235: u'n', # n with curl
|
|
0x0236: u't', # t with curl
|
|
0x0237: u'j', # dotless j
|
|
0x023c: u'c', # c with stroke
|
|
0x023f: u's', # s with swash tail
|
|
0x0240: u'z', # z with swash tail
|
|
0x0247: u'e', # e with stroke
|
|
0x0249: u'j', # j with stroke
|
|
0x024b: u'q', # q with hook tail
|
|
0x024d: u'r', # r with stroke
|
|
0x024f: u'y', # y with stroke
|
|
}
|
|
_non_id_translate_digraphs = {
|
|
0x00df: u'sz', # ligature sz
|
|
0x00e6: u'ae', # ae
|
|
0x0153: u'oe', # ligature oe
|
|
0x0238: u'db', # db digraph
|
|
0x0239: u'qp', # qp digraph
|
|
}
|
|
|
|
def dupname(node, name):
|
|
node['dupnames'].append(name)
|
|
node['names'].remove(name)
|
|
# Assume that this method is referenced, even though it isn't; we
|
|
# don't want to throw unnecessary system_messages.
|
|
node.referenced = 1
|
|
|
|
def fully_normalize_name(name):
|
|
"""Return a case- and whitespace-normalized name."""
|
|
return ' '.join(name.lower().split())
|
|
|
|
def whitespace_normalize_name(name):
|
|
"""Return a whitespace-normalized name."""
|
|
return ' '.join(name.split())
|
|
|
|
def serial_escape(value):
|
|
"""Escape string values that are elements of a list, for serialization."""
|
|
return value.replace('\\', r'\\').replace(' ', r'\ ')
|
|
|
|
def pseudo_quoteattr(value):
|
|
"""Quote attributes for pseudo-xml"""
|
|
return '"%s"' % value
|
|
|
|
#
|
|
#
|
|
# Local Variables:
|
|
# indent-tabs-mode: nil
|
|
# sentence-end-double-space: t
|
|
# fill-column: 78
|
|
# End:
|
|
|