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# $Id: nodes.py 7788 2015-02-16 22:10:52Z 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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__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 types |
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import unicodedata |
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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 __nonzero__(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,): |
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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 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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"""Specialized traverse() that only supports instance checks.""" |
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result = [] |
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if isinstance(self, cls): |
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result.append(self) |
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for child in self.children: |
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result.extend(child._fast_traverse(cls)) |
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return result |
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def _all_traverse(self): |
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"""Specialized traverse() that doesn't check for a condition.""" |
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result = [] |
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result.append(self) |
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for child in self.children: |
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result.extend(child._all_traverse()) |
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return result |
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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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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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return self._all_traverse() |
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elif isinstance(condition, (types.ClassType, type)): |
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return self._fast_traverse(condition) |
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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, (types.ClassType, 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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r = [] |
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if include_self and (condition is None or condition(self)): |
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r.append(self) |
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if descend and len(self.children): |
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for child in self: |
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r.extend(child.traverse(include_self=True, descend=True, |
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siblings=False, ascend=False, |
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condition=condition)) |
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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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r.extend(sibling.traverse(include_self=True, |
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descend=descend, |
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siblings=False, ascend=False, |
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condition=condition)) |
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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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return r |
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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 0, though. |
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""" |
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iterable = self.traverse(condition=condition, |
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include_self=include_self, descend=descend, |
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siblings=siblings, ascend=ascend) |
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try: |
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return iterable[0] |
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except IndexError: |
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return None |
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if sys.version_info < (3,): |
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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,) and isinstance(s, unicode): |
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return s.encode('ascii', 'backslashreplace') |
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return s |
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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,): |
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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(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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result = [] |
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indent = indent * level |
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for line in self.splitlines(): |
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result.append(indent + line + '\n') |
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return ''.join(result) |
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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. Note that then and now the |
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# rawsource member is lost. |
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def rstrip(self, chars=None): |
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return self.__class__(reprunicode.rstrip(self, chars)) |
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def lstrip(self, chars=None): |
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return self.__class__(reprunicode.lstrip(self, chars)) |
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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',) |
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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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child_text_separator = '\n\n' |
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"""Separator for child nodes, used by `astext()` method.""" |
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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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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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self.attributes = {} |
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"""Dictionary of attribute {name: value}.""" |
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# Initialize list attributes. |
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for att in self.list_attributes: |
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self.attributes[att] = [] |
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for att, value in attributes.items(): |
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att = att.lower() |
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if att in self.list_attributes: |
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# mutable list; make a copy for this node |
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self.attributes[att] = value[:] |
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else: |
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self.attributes[att] = value |
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if self.tagname is None: |
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self.tagname = self.__class__.__name__ |
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def _dom_node(self, domroot): |
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element = domroot.createElement(self.tagname) |
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for attribute, value in self.attlist(): |
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if isinstance(value, list): |
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value = ' '.join([serial_escape('%s' % (v,)) for v in value]) |
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element.setAttribute(attribute, '%s' % value) |
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for child in self.children: |
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element.appendChild(child._dom_node(domroot)) |
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return element |
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def __repr__(self): |
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data = '' |
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for c in self.children: |
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data += c.shortrepr() |
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if len(data) > 60: |
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data = data[:56] + ' ...' |
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break |
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if self['names']: |
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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,): |
|
|
# 2to3 doesn't convert __unicode__ to __str__ |
|
|
__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 __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 __getitem__(self, key): |
|
|
if isinstance(key, basestring): |
|
|
return self.attributes[key] |
|
|
elif isinstance(key, int): |
|
|
return self.children[key] |
|
|
elif isinstance(key, types.SliceType): |
|
|
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, types.SliceType): |
|
|
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, types.SliceType): |
|
|
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 = self.non_default_attributes().items() |
|
|
attlist.sort() |
|
|
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`` |
|
|
__contains__ = hasattr |
|
|
|
|
|
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 selfpattr] 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.maxint): |
|
|
""" |
|
|
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.maxint): |
|
|
""" |
|
|
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): |
|
|
return self.__class__(rawsource=self.rawsource, **self.attributes) |
|
|
|
|
|
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: |
|
|
|
|
|
resolved = 0 |
|
|
|
|
|
|
|
|
class BackLinkable: |
|
|
|
|
|
def add_backref(self, refid): |
|
|
self['backrefs'].append(refid) |
|
|
|
|
|
|
|
|
# ==================== |
|
|
# Element Categories |
|
|
# ==================== |
|
|
|
|
|
class Root: pass |
|
|
|
|
|
class Titular: pass |
|
|
|
|
|
class PreBibliographic: |
|
|
"""Category of Node which may occur before Bibliographic Nodes.""" |
|
|
|
|
|
class Bibliographic: pass |
|
|
|
|
|
class Decorative(PreBibliographic): pass |
|
|
|
|
|
class Structural: pass |
|
|
|
|
|
class Body: 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: pass |
|
|
|
|
|
class Inline: 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: |
|
|
"""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_start = 1 |
|
|
"""Initial ID number.""" |
|
|
|
|
|
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): |
|
|
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']: |
|
|
for name in node['names']: |
|
|
id = self.settings.id_prefix + make_id(name) |
|
|
if id and id not in self.ids: |
|
|
break |
|
|
else: |
|
|
id = '' |
|
|
while not id or id in self.ids: |
|
|
id = (self.settings.id_prefix + |
|
|
self.settings.auto_id_prefix + str(self.id_start)) |
|
|
self.id_start += 1 |
|
|
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): |
|
|
return self.__class__(self.settings, self.reporter, |
|
|
**self.attributes) |
|
|
|
|
|
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, Inline, 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): |
|
|
if message: |
|
|
p = paragraph('', message) |
|
|
children = (p,) + children |
|
|
try: |
|
|
Element.__init__(self, '', *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 = self.details.items() |
|
|
details.sort() |
|
|
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): |
|
|
return self.__class__(self.transform, self.details, self.rawsource, |
|
|
**self.attributes) |
|
|
|
|
|
|
|
|
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: |
|
|
|
|
|
""" |
|
|
"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. |
|
|
""" |
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|
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def __init__(self, document): |
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GenericNodeVisitor.__init__(self, document) |
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self.parent_stack = [] |
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self.parent = [] |
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|
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def get_tree_copy(self): |
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return self.parent[0] |
|
|
|
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|
def default_visit(self, node): |
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"""Copy the current node, and make it the new acting parent.""" |
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|
newnode = node.copy() |
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self.parent.append(newnode) |
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self.parent_stack.append(self.parent) |
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|
self.parent = newnode |
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|
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def default_departure(self, node): |
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"""Restore the previous acting parent.""" |
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|
self.parent = self.parent_stack.pop() |
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|
|
|
|
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class TreePruningException(Exception): |
|
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|
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|
""" |
|
|
Base class for `NodeVisitor`-related tree pruning exceptions. |
|
|
|
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|
Raise subclasses from within ``visit_...`` or ``depart_...`` methods |
|
|
called from `Node.walk()` and `Node.walkabout()` tree traversals to prune |
|
|
the tree traversed. |
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|
""" |
|
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|
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pass |
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|
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class SkipChildren(TreePruningException): |
|
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|
|
|
""" |
|
|
Do not visit any children of the current node. The current node's |
|
|
siblings and ``depart_...`` method are not affected. |
|
|
""" |
|
|
|
|
|
pass |
|
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|
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|
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class SkipSiblings(TreePruningException): |
|
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|
|
|
""" |
|
|
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. |
|
|
""" |
|
|
|
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|
pass |
|
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|
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|
class SkipNode(TreePruningException): |
|
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|
|
|
""" |
|
|
Do not visit the current node's children, and do not call the current |
|
|
node's ``depart_...`` method. |
|
|
""" |
|
|
|
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|
pass |
|
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|
|
|
|
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class SkipDeparture(TreePruningException): |
|
|
|
|
|
""" |
|
|
Do not call the current node's ``depart_...`` method. The current node's |
|
|
children and siblings are not affected. |
|
|
""" |
|
|
|
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|
pass |
|
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|
|
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|
|
|
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:
|
|
|
|
