920 lines
36 KiB
Python
920 lines
36 KiB
Python
# $Id: references.py 9037 2022-03-05 23:31:10Z milde $
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# Author: David Goodger <goodger@python.org>
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# Copyright: This module has been placed in the public domain.
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"""
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Transforms for resolving references.
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"""
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__docformat__ = 'reStructuredText'
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from docutils import nodes, utils
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from docutils.transforms import Transform
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class PropagateTargets(Transform):
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"""
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Propagate empty internal targets to the next element.
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Given the following nodes::
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<target ids="internal1" names="internal1">
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<target anonymous="1" ids="id1">
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<target ids="internal2" names="internal2">
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<paragraph>
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This is a test.
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PropagateTargets propagates the ids and names of the internal
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targets preceding the paragraph to the paragraph itself::
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<target refid="internal1">
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<target anonymous="1" refid="id1">
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<target refid="internal2">
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<paragraph ids="internal2 id1 internal1" names="internal2 internal1">
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This is a test.
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"""
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default_priority = 260
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def apply(self):
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for target in self.document.findall(nodes.target):
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# Only block-level targets without reference (like ".. _target:"):
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if (isinstance(target.parent, nodes.TextElement)
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or (target.hasattr('refid') or target.hasattr('refuri')
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or target.hasattr('refname'))):
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continue
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assert len(target) == 0, 'error: block-level target has children'
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next_node = target.next_node(ascend=True)
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# skip system messages (may be removed by universal.FilterMessages)
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while isinstance(next_node, nodes.system_message):
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next_node = next_node.next_node(ascend=True, descend=False)
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# Do not move names and ids into Invisibles (we'd lose the
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# attributes) or different Targetables (e.g. footnotes).
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if (next_node is None
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or isinstance(next_node, (nodes.Invisible, nodes.Targetable))
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and not isinstance(next_node, nodes.target)):
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continue
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next_node['ids'].extend(target['ids'])
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next_node['names'].extend(target['names'])
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# Set defaults for next_node.expect_referenced_by_name/id.
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if not hasattr(next_node, 'expect_referenced_by_name'):
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next_node.expect_referenced_by_name = {}
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if not hasattr(next_node, 'expect_referenced_by_id'):
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next_node.expect_referenced_by_id = {}
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for id in target['ids']:
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# Update IDs to node mapping.
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self.document.ids[id] = next_node
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# If next_node is referenced by id ``id``, this
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# target shall be marked as referenced.
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next_node.expect_referenced_by_id[id] = target
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for name in target['names']:
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next_node.expect_referenced_by_name[name] = target
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# If there are any expect_referenced_by_... attributes
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# in target set, copy them to next_node.
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next_node.expect_referenced_by_name.update(
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getattr(target, 'expect_referenced_by_name', {}))
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next_node.expect_referenced_by_id.update(
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getattr(target, 'expect_referenced_by_id', {}))
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# Set refid to point to the first former ID of target
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# which is now an ID of next_node.
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target['refid'] = target['ids'][0]
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# Clear ids and names; they have been moved to
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# next_node.
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target['ids'] = []
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target['names'] = []
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self.document.note_refid(target)
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class AnonymousHyperlinks(Transform):
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"""
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Link anonymous references to targets. Given::
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<paragraph>
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<reference anonymous="1">
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internal
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<reference anonymous="1">
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external
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<target anonymous="1" ids="id1">
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<target anonymous="1" ids="id2" refuri="http://external">
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Corresponding references are linked via "refid" or resolved via "refuri"::
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<paragraph>
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<reference anonymous="1" refid="id1">
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text
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<reference anonymous="1" refuri="http://external">
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external
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<target anonymous="1" ids="id1">
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<target anonymous="1" ids="id2" refuri="http://external">
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"""
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default_priority = 440
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def apply(self):
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anonymous_refs = []
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anonymous_targets = []
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for node in self.document.findall(nodes.reference):
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if node.get('anonymous'):
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anonymous_refs.append(node)
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for node in self.document.findall(nodes.target):
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if node.get('anonymous'):
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anonymous_targets.append(node)
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if len(anonymous_refs) != len(anonymous_targets):
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msg = self.document.reporter.error(
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'Anonymous hyperlink mismatch: %s references but %s '
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'targets.\nSee "backrefs" attribute for IDs.'
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% (len(anonymous_refs), len(anonymous_targets)))
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msgid = self.document.set_id(msg)
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for ref in anonymous_refs:
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prb = nodes.problematic(
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ref.rawsource, ref.rawsource, refid=msgid)
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prbid = self.document.set_id(prb)
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msg.add_backref(prbid)
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ref.replace_self(prb)
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return
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for ref, target in zip(anonymous_refs, anonymous_targets):
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target.referenced = 1
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while True:
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if target.hasattr('refuri'):
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ref['refuri'] = target['refuri']
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ref.resolved = 1
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break
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else:
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if not target['ids']:
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# Propagated target.
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target = self.document.ids[target['refid']]
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continue
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ref['refid'] = target['ids'][0]
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self.document.note_refid(ref)
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break
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class IndirectHyperlinks(Transform):
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"""
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a) Indirect external references::
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<paragraph>
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<reference refname="indirect external">
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indirect external
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<target id="id1" name="direct external"
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refuri="http://indirect">
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<target id="id2" name="indirect external"
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refname="direct external">
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The "refuri" attribute is migrated back to all indirect targets
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from the final direct target (i.e. a target not referring to
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another indirect target)::
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<paragraph>
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<reference refname="indirect external">
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indirect external
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<target id="id1" name="direct external"
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refuri="http://indirect">
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<target id="id2" name="indirect external"
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refuri="http://indirect">
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Once the attribute is migrated, the preexisting "refname" attribute
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is dropped.
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b) Indirect internal references::
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<target id="id1" name="final target">
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<paragraph>
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<reference refname="indirect internal">
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indirect internal
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<target id="id2" name="indirect internal 2"
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refname="final target">
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<target id="id3" name="indirect internal"
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refname="indirect internal 2">
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Targets which indirectly refer to an internal target become one-hop
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indirect (their "refid" attributes are directly set to the internal
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target's "id"). References which indirectly refer to an internal
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target become direct internal references::
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<target id="id1" name="final target">
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<paragraph>
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<reference refid="id1">
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indirect internal
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<target id="id2" name="indirect internal 2" refid="id1">
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<target id="id3" name="indirect internal" refid="id1">
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"""
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default_priority = 460
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def apply(self):
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for target in self.document.indirect_targets:
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if not target.resolved:
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self.resolve_indirect_target(target)
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self.resolve_indirect_references(target)
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def resolve_indirect_target(self, target):
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refname = target.get('refname')
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if refname is None:
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reftarget_id = target['refid']
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else:
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reftarget_id = self.document.nameids.get(refname)
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if not reftarget_id:
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# Check the unknown_reference_resolvers
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for resolver_function in \
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self.document.transformer.unknown_reference_resolvers:
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if resolver_function(target):
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break
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else:
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self.nonexistent_indirect_target(target)
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return
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reftarget = self.document.ids[reftarget_id]
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reftarget.note_referenced_by(id=reftarget_id)
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if (isinstance(reftarget, nodes.target)
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and not reftarget.resolved
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and reftarget.hasattr('refname')):
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if hasattr(target, 'multiply_indirect'):
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self.circular_indirect_reference(target)
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return
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target.multiply_indirect = 1
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self.resolve_indirect_target(reftarget) # multiply indirect
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del target.multiply_indirect
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if reftarget.hasattr('refuri'):
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target['refuri'] = reftarget['refuri']
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if 'refid' in target:
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del target['refid']
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elif reftarget.hasattr('refid'):
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target['refid'] = reftarget['refid']
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self.document.note_refid(target)
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else:
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if reftarget['ids']:
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target['refid'] = reftarget_id
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self.document.note_refid(target)
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else:
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self.nonexistent_indirect_target(target)
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return
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if refname is not None:
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del target['refname']
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target.resolved = 1
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def nonexistent_indirect_target(self, target):
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if target['refname'] in self.document.nameids:
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self.indirect_target_error(target, 'which is a duplicate, and '
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'cannot be used as a unique reference')
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else:
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self.indirect_target_error(target, 'which does not exist')
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def circular_indirect_reference(self, target):
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self.indirect_target_error(target, 'forming a circular reference')
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def indirect_target_error(self, target, explanation):
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naming = ''
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reflist = []
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if target['names']:
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naming = '"%s" ' % target['names'][0]
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for name in target['names']:
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reflist.extend(self.document.refnames.get(name, []))
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for id in target['ids']:
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reflist.extend(self.document.refids.get(id, []))
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if target['ids']:
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naming += '(id="%s")' % target['ids'][0]
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msg = self.document.reporter.error(
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'Indirect hyperlink target %s refers to target "%s", %s.'
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% (naming, target['refname'], explanation), base_node=target)
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msgid = self.document.set_id(msg)
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for ref in utils.uniq(reflist):
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prb = nodes.problematic(
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ref.rawsource, ref.rawsource, refid=msgid)
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prbid = self.document.set_id(prb)
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msg.add_backref(prbid)
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ref.replace_self(prb)
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target.resolved = 1
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def resolve_indirect_references(self, target):
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if target.hasattr('refid'):
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attname = 'refid'
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call_method = self.document.note_refid
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elif target.hasattr('refuri'):
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attname = 'refuri'
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call_method = None
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else:
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return
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attval = target[attname]
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for name in target['names']:
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reflist = self.document.refnames.get(name, [])
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if reflist:
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target.note_referenced_by(name=name)
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for ref in reflist:
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if ref.resolved:
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continue
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del ref['refname']
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ref[attname] = attval
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if call_method:
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call_method(ref)
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ref.resolved = 1
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if isinstance(ref, nodes.target):
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self.resolve_indirect_references(ref)
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for id in target['ids']:
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reflist = self.document.refids.get(id, [])
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if reflist:
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target.note_referenced_by(id=id)
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for ref in reflist:
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if ref.resolved:
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continue
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del ref['refid']
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ref[attname] = attval
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if call_method:
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call_method(ref)
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ref.resolved = 1
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if isinstance(ref, nodes.target):
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self.resolve_indirect_references(ref)
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class ExternalTargets(Transform):
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"""
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Given::
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<paragraph>
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<reference refname="direct external">
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direct external
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<target id="id1" name="direct external" refuri="http://direct">
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The "refname" attribute is replaced by the direct "refuri" attribute::
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<paragraph>
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<reference refuri="http://direct">
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direct external
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<target id="id1" name="direct external" refuri="http://direct">
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"""
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default_priority = 640
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def apply(self):
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for target in self.document.findall(nodes.target):
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if target.hasattr('refuri'):
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refuri = target['refuri']
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for name in target['names']:
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reflist = self.document.refnames.get(name, [])
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if reflist:
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target.note_referenced_by(name=name)
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for ref in reflist:
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if ref.resolved:
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continue
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del ref['refname']
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ref['refuri'] = refuri
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ref.resolved = 1
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class InternalTargets(Transform):
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default_priority = 660
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def apply(self):
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for target in self.document.findall(nodes.target):
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if not target.hasattr('refuri') and not target.hasattr('refid'):
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self.resolve_reference_ids(target)
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def resolve_reference_ids(self, target):
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"""
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Given::
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<paragraph>
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<reference refname="direct internal">
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direct internal
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<target id="id1" name="direct internal">
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The "refname" attribute is replaced by "refid" linking to the target's
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"id"::
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<paragraph>
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<reference refid="id1">
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direct internal
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<target id="id1" name="direct internal">
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"""
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for name in target['names']:
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refid = self.document.nameids.get(name)
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reflist = self.document.refnames.get(name, [])
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if reflist:
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target.note_referenced_by(name=name)
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for ref in reflist:
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if ref.resolved:
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continue
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if refid:
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del ref['refname']
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ref['refid'] = refid
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ref.resolved = 1
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class Footnotes(Transform):
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"""
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Assign numbers to autonumbered footnotes, and resolve links to footnotes,
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citations, and their references.
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Given the following ``document`` as input::
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<document>
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<paragraph>
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A labeled autonumbered footnote reference:
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<footnote_reference auto="1" id="id1" refname="footnote">
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<paragraph>
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An unlabeled autonumbered footnote reference:
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<footnote_reference auto="1" id="id2">
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<footnote auto="1" id="id3">
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<paragraph>
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Unlabeled autonumbered footnote.
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<footnote auto="1" id="footnote" name="footnote">
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<paragraph>
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Labeled autonumbered footnote.
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Auto-numbered footnotes have attribute ``auto="1"`` and no label.
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Auto-numbered footnote_references have no reference text (they're
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empty elements). When resolving the numbering, a ``label`` element
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is added to the beginning of the ``footnote``, and reference text
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to the ``footnote_reference``.
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The transformed result will be::
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<document>
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<paragraph>
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A labeled autonumbered footnote reference:
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<footnote_reference auto="1" id="id1" refid="footnote">
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2
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<paragraph>
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An unlabeled autonumbered footnote reference:
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<footnote_reference auto="1" id="id2" refid="id3">
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1
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<footnote auto="1" id="id3" backrefs="id2">
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<label>
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1
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<paragraph>
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Unlabeled autonumbered footnote.
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<footnote auto="1" id="footnote" name="footnote" backrefs="id1">
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<label>
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2
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<paragraph>
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Labeled autonumbered footnote.
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Note that the footnotes are not in the same order as the references.
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The labels and reference text are added to the auto-numbered ``footnote``
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and ``footnote_reference`` elements. Footnote elements are backlinked to
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their references via "refids" attributes. References are assigned "id"
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and "refid" attributes.
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After adding labels and reference text, the "auto" attributes can be
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ignored.
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"""
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default_priority = 620
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autofootnote_labels = None
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"""Keep track of unlabeled autonumbered footnotes."""
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symbols = [
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# Entries 1-4 and 6 below are from section 12.51 of
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# The Chicago Manual of Style, 14th edition.
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'*', # asterisk/star
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'\u2020', # † † dagger
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'\u2021', # ‡ ‡ double dagger
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'\u00A7', # § § section mark
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'\u00B6', # ¶ ¶ paragraph mark (pilcrow)
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# (parallels ['||'] in CMoS)
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'#', # number sign
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# The entries below were chosen arbitrarily.
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'\u2660', # ♠ ♠ spade suit
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'\u2665', # ♡ ♥ heart suit
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'\u2666', # ♢ ♦ diamond suit
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'\u2663', # ♣ ♣ club suit
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]
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def apply(self):
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self.autofootnote_labels = []
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startnum = self.document.autofootnote_start
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self.document.autofootnote_start = self.number_footnotes(startnum)
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self.number_footnote_references(startnum)
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self.symbolize_footnotes()
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self.resolve_footnotes_and_citations()
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def number_footnotes(self, startnum):
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"""
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Assign numbers to autonumbered footnotes.
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For labeled autonumbered footnotes, copy the number over to
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corresponding footnote references.
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"""
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for footnote in self.document.autofootnotes:
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while True:
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label = str(startnum)
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startnum += 1
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if label not in self.document.nameids:
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break
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footnote.insert(0, nodes.label('', label))
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for name in footnote['names']:
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for ref in self.document.footnote_refs.get(name, []):
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ref += nodes.Text(label)
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ref.delattr('refname')
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assert len(footnote['ids']) == len(ref['ids']) == 1
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ref['refid'] = footnote['ids'][0]
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footnote.add_backref(ref['ids'][0])
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self.document.note_refid(ref)
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ref.resolved = 1
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if not footnote['names'] and not footnote['dupnames']:
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footnote['names'].append(label)
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self.document.note_explicit_target(footnote, footnote)
|
|
self.autofootnote_labels.append(label)
|
|
return startnum
|
|
|
|
def number_footnote_references(self, startnum):
|
|
"""Assign numbers to autonumbered footnote references."""
|
|
i = 0
|
|
for ref in self.document.autofootnote_refs:
|
|
if ref.resolved or ref.hasattr('refid'):
|
|
continue
|
|
try:
|
|
label = self.autofootnote_labels[i]
|
|
except IndexError:
|
|
msg = self.document.reporter.error(
|
|
'Too many autonumbered footnote references: only %s '
|
|
'corresponding footnotes available.'
|
|
% len(self.autofootnote_labels), base_node=ref)
|
|
msgid = self.document.set_id(msg)
|
|
for ref in self.document.autofootnote_refs[i:]:
|
|
if ref.resolved or ref.hasattr('refname'):
|
|
continue
|
|
prb = nodes.problematic(
|
|
ref.rawsource, ref.rawsource, refid=msgid)
|
|
prbid = self.document.set_id(prb)
|
|
msg.add_backref(prbid)
|
|
ref.replace_self(prb)
|
|
break
|
|
ref += nodes.Text(label)
|
|
id = self.document.nameids[label]
|
|
footnote = self.document.ids[id]
|
|
ref['refid'] = id
|
|
self.document.note_refid(ref)
|
|
assert len(ref['ids']) == 1
|
|
footnote.add_backref(ref['ids'][0])
|
|
ref.resolved = 1
|
|
i += 1
|
|
|
|
def symbolize_footnotes(self):
|
|
"""Add symbols indexes to "[*]"-style footnotes and references."""
|
|
labels = []
|
|
for footnote in self.document.symbol_footnotes:
|
|
reps, index = divmod(self.document.symbol_footnote_start,
|
|
len(self.symbols))
|
|
labeltext = self.symbols[index] * (reps + 1)
|
|
labels.append(labeltext)
|
|
footnote.insert(0, nodes.label('', labeltext))
|
|
self.document.symbol_footnote_start += 1
|
|
self.document.set_id(footnote)
|
|
i = 0
|
|
for ref in self.document.symbol_footnote_refs:
|
|
try:
|
|
ref += nodes.Text(labels[i])
|
|
except IndexError:
|
|
msg = self.document.reporter.error(
|
|
'Too many symbol footnote references: only %s '
|
|
'corresponding footnotes available.' % len(labels),
|
|
base_node=ref)
|
|
msgid = self.document.set_id(msg)
|
|
for ref in self.document.symbol_footnote_refs[i:]:
|
|
if ref.resolved or ref.hasattr('refid'):
|
|
continue
|
|
prb = nodes.problematic(
|
|
ref.rawsource, ref.rawsource, refid=msgid)
|
|
prbid = self.document.set_id(prb)
|
|
msg.add_backref(prbid)
|
|
ref.replace_self(prb)
|
|
break
|
|
footnote = self.document.symbol_footnotes[i]
|
|
assert len(footnote['ids']) == 1
|
|
ref['refid'] = footnote['ids'][0]
|
|
self.document.note_refid(ref)
|
|
footnote.add_backref(ref['ids'][0])
|
|
i += 1
|
|
|
|
def resolve_footnotes_and_citations(self):
|
|
"""
|
|
Link manually-labeled footnotes and citations to/from their
|
|
references.
|
|
"""
|
|
for footnote in self.document.footnotes:
|
|
for label in footnote['names']:
|
|
if label in self.document.footnote_refs:
|
|
reflist = self.document.footnote_refs[label]
|
|
self.resolve_references(footnote, reflist)
|
|
for citation in self.document.citations:
|
|
for label in citation['names']:
|
|
if label in self.document.citation_refs:
|
|
reflist = self.document.citation_refs[label]
|
|
self.resolve_references(citation, reflist)
|
|
|
|
def resolve_references(self, note, reflist):
|
|
assert len(note['ids']) == 1
|
|
id = note['ids'][0]
|
|
for ref in reflist:
|
|
if ref.resolved:
|
|
continue
|
|
ref.delattr('refname')
|
|
ref['refid'] = id
|
|
assert len(ref['ids']) == 1
|
|
note.add_backref(ref['ids'][0])
|
|
ref.resolved = 1
|
|
note.resolved = 1
|
|
|
|
|
|
class CircularSubstitutionDefinitionError(Exception):
|
|
pass
|
|
|
|
|
|
class Substitutions(Transform):
|
|
|
|
"""
|
|
Given the following ``document`` as input::
|
|
|
|
<document>
|
|
<paragraph>
|
|
The
|
|
<substitution_reference refname="biohazard">
|
|
biohazard
|
|
symbol is deservedly scary-looking.
|
|
<substitution_definition name="biohazard">
|
|
<image alt="biohazard" uri="biohazard.png">
|
|
|
|
The ``substitution_reference`` will simply be replaced by the
|
|
contents of the corresponding ``substitution_definition``.
|
|
|
|
The transformed result will be::
|
|
|
|
<document>
|
|
<paragraph>
|
|
The
|
|
<image alt="biohazard" uri="biohazard.png">
|
|
symbol is deservedly scary-looking.
|
|
<substitution_definition name="biohazard">
|
|
<image alt="biohazard" uri="biohazard.png">
|
|
"""
|
|
|
|
default_priority = 220
|
|
"""The Substitutions transform has to be applied very early, before
|
|
`docutils.transforms.frontmatter.DocTitle` and others."""
|
|
|
|
def apply(self):
|
|
defs = self.document.substitution_defs
|
|
normed = self.document.substitution_names
|
|
nested = {}
|
|
line_length_limit = getattr(self.document.settings,
|
|
"line_length_limit", 10000)
|
|
|
|
subreflist = list(self.document.findall(nodes.substitution_reference))
|
|
for ref in subreflist:
|
|
msg = ''
|
|
refname = ref['refname']
|
|
if refname in defs:
|
|
key = refname
|
|
else:
|
|
normed_name = refname.lower()
|
|
key = normed.get(normed_name, None)
|
|
if key is None:
|
|
msg = self.document.reporter.error(
|
|
'Undefined substitution referenced: "%s".'
|
|
% refname, base_node=ref)
|
|
else:
|
|
subdef = defs[key]
|
|
if len(subdef.astext()) > line_length_limit:
|
|
msg = self.document.reporter.error(
|
|
'Substitution definition "%s" exceeds the'
|
|
' line-length-limit.' % key)
|
|
if msg:
|
|
msgid = self.document.set_id(msg)
|
|
prb = nodes.problematic(
|
|
ref.rawsource, ref.rawsource, refid=msgid)
|
|
prbid = self.document.set_id(prb)
|
|
msg.add_backref(prbid)
|
|
ref.replace_self(prb)
|
|
continue
|
|
|
|
parent = ref.parent
|
|
index = parent.index(ref)
|
|
if ('ltrim' in subdef.attributes
|
|
or 'trim' in subdef.attributes):
|
|
if index > 0 and isinstance(parent[index - 1],
|
|
nodes.Text):
|
|
parent[index - 1] = parent[index - 1].rstrip()
|
|
if ('rtrim' in subdef.attributes
|
|
or 'trim' in subdef.attributes):
|
|
if (len(parent) > index + 1
|
|
and isinstance(parent[index + 1], nodes.Text)):
|
|
parent[index + 1] = parent[index + 1].lstrip()
|
|
subdef_copy = subdef.deepcopy()
|
|
try:
|
|
# Take care of nested substitution references:
|
|
for nested_ref in subdef_copy.findall(
|
|
nodes.substitution_reference):
|
|
nested_name = normed[nested_ref['refname'].lower()]
|
|
if nested_name in nested.setdefault(nested_name, []):
|
|
raise CircularSubstitutionDefinitionError
|
|
nested[nested_name].append(key)
|
|
nested_ref['ref-origin'] = ref
|
|
subreflist.append(nested_ref)
|
|
except CircularSubstitutionDefinitionError:
|
|
parent = ref.parent
|
|
if isinstance(parent, nodes.substitution_definition):
|
|
msg = self.document.reporter.error(
|
|
'Circular substitution definition detected:',
|
|
nodes.literal_block(parent.rawsource,
|
|
parent.rawsource),
|
|
line=parent.line, base_node=parent)
|
|
parent.replace_self(msg)
|
|
else:
|
|
# find original ref substitution which caused this error
|
|
ref_origin = ref
|
|
while ref_origin.hasattr('ref-origin'):
|
|
ref_origin = ref_origin['ref-origin']
|
|
msg = self.document.reporter.error(
|
|
'Circular substitution definition referenced: '
|
|
'"%s".' % refname, base_node=ref_origin)
|
|
msgid = self.document.set_id(msg)
|
|
prb = nodes.problematic(
|
|
ref.rawsource, ref.rawsource, refid=msgid)
|
|
prbid = self.document.set_id(prb)
|
|
msg.add_backref(prbid)
|
|
ref.replace_self(prb)
|
|
continue
|
|
ref.replace_self(subdef_copy.children)
|
|
# register refname of the replacement node(s)
|
|
# (needed for resolution of references)
|
|
for node in subdef_copy.children:
|
|
if isinstance(node, nodes.Referential):
|
|
# HACK: verify refname attribute exists.
|
|
# Test with docs/dev/todo.txt, see. |donate|
|
|
if 'refname' in node:
|
|
self.document.note_refname(node)
|
|
|
|
|
|
class TargetNotes(Transform):
|
|
|
|
"""
|
|
Creates a footnote for each external target in the text, and corresponding
|
|
footnote references after each reference.
|
|
"""
|
|
|
|
default_priority = 540
|
|
"""The TargetNotes transform has to be applied after `IndirectHyperlinks`
|
|
but before `Footnotes`."""
|
|
|
|
def __init__(self, document, startnode):
|
|
Transform.__init__(self, document, startnode=startnode)
|
|
|
|
self.classes = startnode.details.get('class', [])
|
|
|
|
def apply(self):
|
|
notes = {}
|
|
nodelist = []
|
|
for target in self.document.findall(nodes.target):
|
|
# Only external targets.
|
|
if not target.hasattr('refuri'):
|
|
continue
|
|
names = target['names']
|
|
refs = []
|
|
for name in names:
|
|
refs.extend(self.document.refnames.get(name, []))
|
|
if not refs:
|
|
continue
|
|
footnote = self.make_target_footnote(target['refuri'], refs,
|
|
notes)
|
|
if target['refuri'] not in notes:
|
|
notes[target['refuri']] = footnote
|
|
nodelist.append(footnote)
|
|
# Take care of anonymous references.
|
|
for ref in self.document.findall(nodes.reference):
|
|
if not ref.get('anonymous'):
|
|
continue
|
|
if ref.hasattr('refuri'):
|
|
footnote = self.make_target_footnote(ref['refuri'], [ref],
|
|
notes)
|
|
if ref['refuri'] not in notes:
|
|
notes[ref['refuri']] = footnote
|
|
nodelist.append(footnote)
|
|
self.startnode.replace_self(nodelist)
|
|
|
|
def make_target_footnote(self, refuri, refs, notes):
|
|
if refuri in notes: # duplicate?
|
|
footnote = notes[refuri]
|
|
assert len(footnote['names']) == 1
|
|
footnote_name = footnote['names'][0]
|
|
else: # original
|
|
footnote = nodes.footnote()
|
|
footnote_id = self.document.set_id(footnote)
|
|
# Use uppercase letters and a colon; they can't be
|
|
# produced inside names by the parser.
|
|
footnote_name = 'TARGET_NOTE: ' + footnote_id
|
|
footnote['auto'] = 1
|
|
footnote['names'] = [footnote_name]
|
|
footnote_paragraph = nodes.paragraph()
|
|
footnote_paragraph += nodes.reference('', refuri, refuri=refuri)
|
|
footnote += footnote_paragraph
|
|
self.document.note_autofootnote(footnote)
|
|
self.document.note_explicit_target(footnote, footnote)
|
|
for ref in refs:
|
|
if isinstance(ref, nodes.target):
|
|
continue
|
|
refnode = nodes.footnote_reference(refname=footnote_name, auto=1)
|
|
refnode['classes'] += self.classes
|
|
self.document.note_autofootnote_ref(refnode)
|
|
self.document.note_footnote_ref(refnode)
|
|
index = ref.parent.index(ref) + 1
|
|
reflist = [refnode]
|
|
if not utils.get_trim_footnote_ref_space(self.document.settings):
|
|
if self.classes:
|
|
reflist.insert(
|
|
0, nodes.inline(text=' ', Classes=self.classes))
|
|
else:
|
|
reflist.insert(0, nodes.Text(' '))
|
|
ref.parent.insert(index, reflist)
|
|
return footnote
|
|
|
|
|
|
class DanglingReferences(Transform):
|
|
|
|
"""
|
|
Check for dangling references (incl. footnote & citation) and for
|
|
unreferenced targets.
|
|
"""
|
|
|
|
default_priority = 850
|
|
|
|
def apply(self):
|
|
visitor = DanglingReferencesVisitor(
|
|
self.document,
|
|
self.document.transformer.unknown_reference_resolvers)
|
|
self.document.walk(visitor)
|
|
# *After* resolving all references, check for unreferenced
|
|
# targets:
|
|
for target in self.document.findall(nodes.target):
|
|
if not target.referenced:
|
|
if target.get('anonymous'):
|
|
# If we have unreferenced anonymous targets, there
|
|
# is already an error message about anonymous
|
|
# hyperlink mismatch; no need to generate another
|
|
# message.
|
|
continue
|
|
if target['names']:
|
|
naming = target['names'][0]
|
|
elif target['ids']:
|
|
naming = target['ids'][0]
|
|
else:
|
|
# Hack: Propagated targets always have their refid
|
|
# attribute set.
|
|
naming = target['refid']
|
|
self.document.reporter.info(
|
|
'Hyperlink target "%s" is not referenced.'
|
|
% naming, base_node=target)
|
|
|
|
|
|
class DanglingReferencesVisitor(nodes.SparseNodeVisitor):
|
|
|
|
def __init__(self, document, unknown_reference_resolvers):
|
|
nodes.SparseNodeVisitor.__init__(self, document)
|
|
self.document = document
|
|
self.unknown_reference_resolvers = unknown_reference_resolvers
|
|
|
|
def unknown_visit(self, node):
|
|
pass
|
|
|
|
def visit_reference(self, node):
|
|
if node.resolved or not node.hasattr('refname'):
|
|
return
|
|
refname = node['refname']
|
|
id = self.document.nameids.get(refname)
|
|
if id is None:
|
|
for resolver_function in self.unknown_reference_resolvers:
|
|
if resolver_function(node):
|
|
break
|
|
else:
|
|
if refname in self.document.nameids:
|
|
msg = self.document.reporter.error(
|
|
'Duplicate target name, cannot be used as a unique '
|
|
'reference: "%s".' % (node['refname']), base_node=node)
|
|
else:
|
|
msg = self.document.reporter.error(
|
|
'Unknown target name: "%s".' % (node['refname']),
|
|
base_node=node)
|
|
msgid = self.document.set_id(msg)
|
|
prb = nodes.problematic(
|
|
node.rawsource, node.rawsource, refid=msgid)
|
|
try:
|
|
prbid = node['ids'][0]
|
|
except IndexError:
|
|
prbid = self.document.set_id(prb)
|
|
msg.add_backref(prbid)
|
|
node.replace_self(prb)
|
|
else:
|
|
del node['refname']
|
|
node['refid'] = id
|
|
self.document.ids[id].note_referenced_by(id=id)
|
|
node.resolved = 1
|
|
|
|
visit_footnote_reference = visit_citation_reference = visit_reference
|