/usr/lib/python2.7/dist-packages/docutils/transforms/references.py is in python-docutils 0.14+dfsg-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 | # $Id: references.py 8067 2017-05-04 20:10:03Z milde $
# Author: David Goodger <goodger@python.org>
# Copyright: This module has been placed in the public domain.
"""
Transforms for resolving references.
"""
__docformat__ = 'reStructuredText'
import sys
import re
from docutils import nodes, utils
from docutils.transforms import TransformError, Transform
class PropagateTargets(Transform):
"""
Propagate empty internal targets to the next element.
Given the following nodes::
<target ids="internal1" names="internal1">
<target anonymous="1" ids="id1">
<target ids="internal2" names="internal2">
<paragraph>
This is a test.
PropagateTargets propagates the ids and names of the internal
targets preceding the paragraph to the paragraph itself::
<target refid="internal1">
<target anonymous="1" refid="id1">
<target refid="internal2">
<paragraph ids="internal2 id1 internal1" names="internal2 internal1">
This is a test.
"""
default_priority = 260
def apply(self):
for target in self.document.traverse(nodes.target):
# Only block-level targets without reference (like ".. target:"):
if (isinstance(target.parent, nodes.TextElement) or
(target.hasattr('refid') or target.hasattr('refuri') or
target.hasattr('refname'))):
continue
assert len(target) == 0, 'error: block-level target has children'
next_node = target.next_node(ascend=True)
# Do not move names and ids into Invisibles (we'd lose the
# attributes) or different Targetables (e.g. footnotes).
if (next_node is not None and
((not isinstance(next_node, nodes.Invisible) and
not isinstance(next_node, nodes.Targetable)) or
isinstance(next_node, nodes.target))):
next_node['ids'].extend(target['ids'])
next_node['names'].extend(target['names'])
# Set defaults for next_node.expect_referenced_by_name/id.
if not hasattr(next_node, 'expect_referenced_by_name'):
next_node.expect_referenced_by_name = {}
if not hasattr(next_node, 'expect_referenced_by_id'):
next_node.expect_referenced_by_id = {}
for id in target['ids']:
# Update IDs to node mapping.
self.document.ids[id] = next_node
# If next_node is referenced by id ``id``, this
# target shall be marked as referenced.
next_node.expect_referenced_by_id[id] = target
for name in target['names']:
next_node.expect_referenced_by_name[name] = target
# If there are any expect_referenced_by_... attributes
# in target set, copy them to next_node.
next_node.expect_referenced_by_name.update(
getattr(target, 'expect_referenced_by_name', {}))
next_node.expect_referenced_by_id.update(
getattr(target, 'expect_referenced_by_id', {}))
# Set refid to point to the first former ID of target
# which is now an ID of next_node.
target['refid'] = target['ids'][0]
# Clear ids and names; they have been moved to
# next_node.
target['ids'] = []
target['names'] = []
self.document.note_refid(target)
class AnonymousHyperlinks(Transform):
"""
Link anonymous references to targets. Given::
<paragraph>
<reference anonymous="1">
internal
<reference anonymous="1">
external
<target anonymous="1" ids="id1">
<target anonymous="1" ids="id2" refuri="http://external">
Corresponding references are linked via "refid" or resolved via "refuri"::
<paragraph>
<reference anonymous="1" refid="id1">
text
<reference anonymous="1" refuri="http://external">
external
<target anonymous="1" ids="id1">
<target anonymous="1" ids="id2" refuri="http://external">
"""
default_priority = 440
def apply(self):
anonymous_refs = []
anonymous_targets = []
for node in self.document.traverse(nodes.reference):
if node.get('anonymous'):
anonymous_refs.append(node)
for node in self.document.traverse(nodes.target):
if node.get('anonymous'):
anonymous_targets.append(node)
if len(anonymous_refs) \
!= len(anonymous_targets):
msg = self.document.reporter.error(
'Anonymous hyperlink mismatch: %s references but %s '
'targets.\nSee "backrefs" attribute for IDs.'
% (len(anonymous_refs), len(anonymous_targets)))
msgid = self.document.set_id(msg)
for ref in anonymous_refs:
prb = nodes.problematic(
ref.rawsource, ref.rawsource, refid=msgid)
prbid = self.document.set_id(prb)
msg.add_backref(prbid)
ref.replace_self(prb)
return
for ref, target in zip(anonymous_refs, anonymous_targets):
target.referenced = 1
while True:
if target.hasattr('refuri'):
ref['refuri'] = target['refuri']
ref.resolved = 1
break
else:
if not target['ids']:
# Propagated target.
target = self.document.ids[target['refid']]
continue
ref['refid'] = target['ids'][0]
self.document.note_refid(ref)
break
class IndirectHyperlinks(Transform):
"""
a) Indirect external references::
<paragraph>
<reference refname="indirect external">
indirect external
<target id="id1" name="direct external"
refuri="http://indirect">
<target id="id2" name="indirect external"
refname="direct external">
The "refuri" attribute is migrated back to all indirect targets
from the final direct target (i.e. a target not referring to
another indirect target)::
<paragraph>
<reference refname="indirect external">
indirect external
<target id="id1" name="direct external"
refuri="http://indirect">
<target id="id2" name="indirect external"
refuri="http://indirect">
Once the attribute is migrated, the preexisting "refname" attribute
is dropped.
b) Indirect internal references::
<target id="id1" name="final target">
<paragraph>
<reference refname="indirect internal">
indirect internal
<target id="id2" name="indirect internal 2"
refname="final target">
<target id="id3" name="indirect internal"
refname="indirect internal 2">
Targets which indirectly refer to an internal target become one-hop
indirect (their "refid" attributes are directly set to the internal
target's "id"). References which indirectly refer to an internal
target become direct internal references::
<target id="id1" name="final target">
<paragraph>
<reference refid="id1">
indirect internal
<target id="id2" name="indirect internal 2" refid="id1">
<target id="id3" name="indirect internal" refid="id1">
"""
default_priority = 460
def apply(self):
for target in self.document.indirect_targets:
if not target.resolved:
self.resolve_indirect_target(target)
self.resolve_indirect_references(target)
def resolve_indirect_target(self, target):
refname = target.get('refname')
if refname is None:
reftarget_id = target['refid']
else:
reftarget_id = self.document.nameids.get(refname)
if not reftarget_id:
# Check the unknown_reference_resolvers
for resolver_function in \
self.document.transformer.unknown_reference_resolvers:
if resolver_function(target):
break
else:
self.nonexistent_indirect_target(target)
return
reftarget = self.document.ids[reftarget_id]
reftarget.note_referenced_by(id=reftarget_id)
if isinstance(reftarget, nodes.target) \
and not reftarget.resolved and reftarget.hasattr('refname'):
if hasattr(target, 'multiply_indirect'):
#and target.multiply_indirect):
#del target.multiply_indirect
self.circular_indirect_reference(target)
return
target.multiply_indirect = 1
self.resolve_indirect_target(reftarget) # multiply indirect
del target.multiply_indirect
if reftarget.hasattr('refuri'):
target['refuri'] = reftarget['refuri']
if 'refid' in target:
del target['refid']
elif reftarget.hasattr('refid'):
target['refid'] = reftarget['refid']
self.document.note_refid(target)
else:
if reftarget['ids']:
target['refid'] = reftarget_id
self.document.note_refid(target)
else:
self.nonexistent_indirect_target(target)
return
if refname is not None:
del target['refname']
target.resolved = 1
def nonexistent_indirect_target(self, target):
if target['refname'] in self.document.nameids:
self.indirect_target_error(target, 'which is a duplicate, and '
'cannot be used as a unique reference')
else:
self.indirect_target_error(target, 'which does not exist')
def circular_indirect_reference(self, target):
self.indirect_target_error(target, 'forming a circular reference')
def indirect_target_error(self, target, explanation):
naming = ''
reflist = []
if target['names']:
naming = '"%s" ' % target['names'][0]
for name in target['names']:
reflist.extend(self.document.refnames.get(name, []))
for id in target['ids']:
reflist.extend(self.document.refids.get(id, []))
if target['ids']:
naming += '(id="%s")' % target['ids'][0]
msg = self.document.reporter.error(
'Indirect hyperlink target %s refers to target "%s", %s.'
% (naming, target['refname'], explanation), base_node=target)
msgid = self.document.set_id(msg)
for ref in utils.uniq(reflist):
prb = nodes.problematic(
ref.rawsource, ref.rawsource, refid=msgid)
prbid = self.document.set_id(prb)
msg.add_backref(prbid)
ref.replace_self(prb)
target.resolved = 1
def resolve_indirect_references(self, target):
if target.hasattr('refid'):
attname = 'refid'
call_method = self.document.note_refid
elif target.hasattr('refuri'):
attname = 'refuri'
call_method = None
else:
return
attval = target[attname]
for name in target['names']:
reflist = self.document.refnames.get(name, [])
if reflist:
target.note_referenced_by(name=name)
for ref in reflist:
if ref.resolved:
continue
del ref['refname']
ref[attname] = attval
if call_method:
call_method(ref)
ref.resolved = 1
if isinstance(ref, nodes.target):
self.resolve_indirect_references(ref)
for id in target['ids']:
reflist = self.document.refids.get(id, [])
if reflist:
target.note_referenced_by(id=id)
for ref in reflist:
if ref.resolved:
continue
del ref['refid']
ref[attname] = attval
if call_method:
call_method(ref)
ref.resolved = 1
if isinstance(ref, nodes.target):
self.resolve_indirect_references(ref)
class ExternalTargets(Transform):
"""
Given::
<paragraph>
<reference refname="direct external">
direct external
<target id="id1" name="direct external" refuri="http://direct">
The "refname" attribute is replaced by the direct "refuri" attribute::
<paragraph>
<reference refuri="http://direct">
direct external
<target id="id1" name="direct external" refuri="http://direct">
"""
default_priority = 640
def apply(self):
for target in self.document.traverse(nodes.target):
if target.hasattr('refuri'):
refuri = target['refuri']
for name in target['names']:
reflist = self.document.refnames.get(name, [])
if reflist:
target.note_referenced_by(name=name)
for ref in reflist:
if ref.resolved:
continue
del ref['refname']
ref['refuri'] = refuri
ref.resolved = 1
class InternalTargets(Transform):
default_priority = 660
def apply(self):
for target in self.document.traverse(nodes.target):
if not target.hasattr('refuri') and not target.hasattr('refid'):
self.resolve_reference_ids(target)
def resolve_reference_ids(self, target):
"""
Given::
<paragraph>
<reference refname="direct internal">
direct internal
<target id="id1" name="direct internal">
The "refname" attribute is replaced by "refid" linking to the target's
"id"::
<paragraph>
<reference refid="id1">
direct internal
<target id="id1" name="direct internal">
"""
for name in target['names']:
refid = self.document.nameids.get(name)
reflist = self.document.refnames.get(name, [])
if reflist:
target.note_referenced_by(name=name)
for ref in reflist:
if ref.resolved:
continue
if refid:
del ref['refname']
ref['refid'] = refid
ref.resolved = 1
class Footnotes(Transform):
"""
Assign numbers to autonumbered footnotes, and resolve links to footnotes,
citations, and their references.
Given the following ``document`` as input::
<document>
<paragraph>
A labeled autonumbered footnote referece:
<footnote_reference auto="1" id="id1" refname="footnote">
<paragraph>
An unlabeled autonumbered footnote referece:
<footnote_reference auto="1" id="id2">
<footnote auto="1" id="id3">
<paragraph>
Unlabeled autonumbered footnote.
<footnote auto="1" id="footnote" name="footnote">
<paragraph>
Labeled autonumbered footnote.
Auto-numbered footnotes have attribute ``auto="1"`` and no label.
Auto-numbered footnote_references have no reference text (they're
empty elements). When resolving the numbering, a ``label`` element
is added to the beginning of the ``footnote``, and reference text
to the ``footnote_reference``.
The transformed result will be::
<document>
<paragraph>
A labeled autonumbered footnote referece:
<footnote_reference auto="1" id="id1" refid="footnote">
2
<paragraph>
An unlabeled autonumbered footnote referece:
<footnote_reference auto="1" id="id2" refid="id3">
1
<footnote auto="1" id="id3" backrefs="id2">
<label>
1
<paragraph>
Unlabeled autonumbered footnote.
<footnote auto="1" id="footnote" name="footnote" backrefs="id1">
<label>
2
<paragraph>
Labeled autonumbered footnote.
Note that the footnotes are not in the same order as the references.
The labels and reference text are added to the auto-numbered ``footnote``
and ``footnote_reference`` elements. Footnote elements are backlinked to
their references via "refids" attributes. References are assigned "id"
and "refid" attributes.
After adding labels and reference text, the "auto" attributes can be
ignored.
"""
default_priority = 620
autofootnote_labels = None
"""Keep track of unlabeled autonumbered footnotes."""
symbols = [
# Entries 1-4 and 6 below are from section 12.51 of
# The Chicago Manual of Style, 14th edition.
'*', # asterisk/star
u'\u2020', # dagger †
u'\u2021', # double dagger ‡
u'\u00A7', # section mark §
u'\u00B6', # paragraph mark (pilcrow) ¶
# (parallels ['||'] in CMoS)
'#', # number sign
# The entries below were chosen arbitrarily.
u'\u2660', # spade suit ♠
u'\u2665', # heart suit ♥
u'\u2666', # diamond suit ♦
u'\u2663', # club suit ♣
]
def apply(self):
self.autofootnote_labels = []
startnum = self.document.autofootnote_start
self.document.autofootnote_start = self.number_footnotes(startnum)
self.number_footnote_references(startnum)
self.symbolize_footnotes()
self.resolve_footnotes_and_citations()
def number_footnotes(self, startnum):
"""
Assign numbers to autonumbered footnotes.
For labeled autonumbered footnotes, copy the number over to
corresponding footnote references.
"""
for footnote in self.document.autofootnotes:
while True:
label = str(startnum)
startnum += 1
if label not in self.document.nameids:
break
footnote.insert(0, nodes.label('', label))
for name in footnote['names']:
for ref in self.document.footnote_refs.get(name, []):
ref += nodes.Text(label)
ref.delattr('refname')
assert len(footnote['ids']) == len(ref['ids']) == 1
ref['refid'] = footnote['ids'][0]
footnote.add_backref(ref['ids'][0])
self.document.note_refid(ref)
ref.resolved = 1
if not footnote['names'] and not footnote['dupnames']:
footnote['names'].append(label)
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.tranforms.frontmatter.DocTitle` and others."""
def apply(self):
defs = self.document.substitution_defs
normed = self.document.substitution_names
subreflist = self.document.traverse(nodes.substitution_reference)
nested = {}
for ref in subreflist:
refname = ref['refname']
key = None
if refname in defs:
key = refname
else:
normed_name = refname.lower()
if normed_name in normed:
key = normed[normed_name]
if key is None:
msg = self.document.reporter.error(
'Undefined substitution referenced: "%s".'
% refname, base_node=ref)
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)
else:
subdef = defs[key]
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.replace(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.replace(parent[index + 1],
parent[index + 1].lstrip())
subdef_copy = subdef.deepcopy()
try:
# Take care of nested substitution references:
for nested_ref in subdef_copy.traverse(
nodes.substitution_reference):
nested_name = normed[nested_ref['refname'].lower()]
if nested_name in nested.setdefault(nested_name, []):
raise CircularSubstitutionDefinitionError
else:
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 cased 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)
else:
ref.replace_self(subdef_copy.children)
# register refname of the replacment 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.traverse(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.traverse(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.traverse(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
|