/
toctree.py
340 lines (309 loc) · 16.1 KB
/
toctree.py
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
"""Toctree adapter for sphinx.environment."""
from __future__ import annotations
from typing import TYPE_CHECKING, Any, Iterable, TypeVar, cast
from docutils import nodes
from docutils.nodes import Element, Node
from sphinx import addnodes
from sphinx.locale import __
from sphinx.util import logging, url_re
from sphinx.util.matching import Matcher
from sphinx.util.nodes import clean_astext, process_only_nodes
if TYPE_CHECKING:
from sphinx.builders import Builder
from sphinx.environment import BuildEnvironment
logger = logging.getLogger(__name__)
class TocTree:
def __init__(self, env: BuildEnvironment) -> None:
self.env = env
def note(self, docname: str, toctreenode: addnodes.toctree) -> None:
"""Note a TOC tree directive in a document and gather information about
file relations from it.
"""
if toctreenode['glob']:
self.env.glob_toctrees.add(docname)
if toctreenode.get('numbered'):
self.env.numbered_toctrees.add(docname)
includefiles = toctreenode['includefiles']
for includefile in includefiles:
# note that if the included file is rebuilt, this one must be
# too (since the TOC of the included file could have changed)
self.env.files_to_rebuild.setdefault(includefile, set()).add(docname)
self.env.toctree_includes.setdefault(docname, []).extend(includefiles)
def resolve(self, docname: str, builder: Builder, toctree: addnodes.toctree,
prune: bool = True, maxdepth: int = 0, titles_only: bool = False,
collapse: bool = False, includehidden: bool = False) -> Element | None:
"""Resolve a *toctree* node into individual bullet lists with titles
as items, returning None (if no containing titles are found) or
a new node.
If *prune* is True, the tree is pruned to *maxdepth*, or if that is 0,
to the value of the *maxdepth* option on the *toctree* node.
If *titles_only* is True, only toplevel document titles will be in the
resulting tree.
If *collapse* is True, all branches not containing docname will
be collapsed.
"""
if toctree.get('hidden', False) and not includehidden:
return None
generated_docnames: dict[str, tuple[str, str]] = self.env.domains['std']._virtual_doc_names.copy() # NoQA: E501
# For reading the following two helper function, it is useful to keep
# in mind the node structure of a toctree (using HTML-like node names
# for brevity):
#
# <ul>
# <li>
# <p><a></p>
# <p><a></p>
# ...
# <ul>
# ...
# </ul>
# </li>
# </ul>
#
# The transformation is made in two passes in order to avoid
# interactions between marking and pruning the tree (see bug #1046).
toctree_ancestors = self.get_toctree_ancestors(docname)
included = Matcher(self.env.config.include_patterns)
excluded = Matcher(self.env.config.exclude_patterns)
def _toctree_add_classes(node: Element, depth: int) -> None:
"""Add 'toctree-l%d' and 'current' classes to the toctree."""
for subnode in node.children:
if isinstance(subnode, (addnodes.compact_paragraph,
nodes.list_item)):
# for <p> and <li>, indicate the depth level and recurse
subnode['classes'].append(f'toctree-l{depth - 1}')
_toctree_add_classes(subnode, depth)
elif isinstance(subnode, nodes.bullet_list):
# for <ul>, just recurse
_toctree_add_classes(subnode, depth + 1)
elif isinstance(subnode, nodes.reference):
# for <a>, identify which entries point to the current
# document and therefore may not be collapsed
if subnode['refuri'] == docname:
if not subnode['anchorname']:
# give the whole branch a 'current' class
# (useful for styling it differently)
branchnode: Element = subnode
while branchnode:
branchnode['classes'].append('current')
branchnode = branchnode.parent
# mark the list_item as "on current page"
if subnode.parent.parent.get('iscurrent'):
# but only if it's not already done
return
while subnode:
subnode['iscurrent'] = True
subnode = subnode.parent
def _entries_from_toctree(toctreenode: addnodes.toctree, parents: list[str],
subtree: bool = False) -> list[Element]:
"""Return TOC entries for a toctree node."""
refs = [(e[0], e[1]) for e in toctreenode['entries']]
entries: list[Element] = []
for (title, ref) in refs:
try:
refdoc = None
if url_re.match(ref):
if title is None:
title = ref
reference = nodes.reference('', '', internal=False,
refuri=ref, anchorname='',
*[nodes.Text(title)])
para = addnodes.compact_paragraph('', '', reference)
item = nodes.list_item('', para)
toc = nodes.bullet_list('', item)
elif ref == 'self':
# 'self' refers to the document from which this
# toctree originates
ref = toctreenode['parent']
if not title:
title = clean_astext(self.env.titles[ref])
reference = nodes.reference('', '', internal=True,
refuri=ref,
anchorname='',
*[nodes.Text(title)])
para = addnodes.compact_paragraph('', '', reference)
item = nodes.list_item('', para)
# don't show subitems
toc = nodes.bullet_list('', item)
elif ref in generated_docnames:
docname, sectionname = generated_docnames[ref]
if not title:
title = sectionname
reference = nodes.reference('', title, internal=True,
refuri=docname, anchorname='')
para = addnodes.compact_paragraph('', '', reference)
item = nodes.list_item('', para)
# don't show subitems
toc = nodes.bullet_list('', item)
else:
if ref in parents:
logger.warning(__('circular toctree references '
'detected, ignoring: %s <- %s'),
ref, ' <- '.join(parents),
location=ref, type='toc', subtype='circular')
continue
refdoc = ref
maxdepth = self.env.metadata[ref].get('tocdepth', 0)
toc = self.env.tocs[ref]
if ref not in toctree_ancestors or (prune and maxdepth > 0):
toc = self._toctree_copy(toc, 2, maxdepth, collapse)
else:
toc = toc.deepcopy()
process_only_nodes(toc, builder.tags)
if title and toc.children and len(toc.children) == 1:
child = toc.children[0]
for refnode in child.findall(nodes.reference):
if refnode['refuri'] == ref and \
not refnode['anchorname']:
refnode.children = [nodes.Text(title)]
if not toc.children:
# empty toc means: no titles will show up in the toctree
logger.warning(__('toctree contains reference to document %r that '
'doesn\'t have a title: no link will be generated'),
ref, location=toctreenode)
except KeyError:
# this is raised if the included file does not exist
if excluded(self.env.doc2path(ref, False)):
message = __('toctree contains reference to excluded document %r')
elif not included(self.env.doc2path(ref, False)):
message = __('toctree contains reference to non-included document %r')
else:
message = __('toctree contains reference to nonexisting document %r')
logger.warning(message, ref, location=toctreenode)
else:
# children of toc are:
# - list_item + compact_paragraph + (reference and subtoc)
# - only + subtoc
# - toctree
children = cast(Iterable[nodes.Element], toc)
# if titles_only is given, only keep the main title and
# sub-toctrees
if titles_only:
# delete everything but the toplevel title(s)
# and toctrees
for toplevel in children:
# nodes with length 1 don't have any children anyway
if len(toplevel) > 1:
subtrees = list(toplevel.findall(addnodes.toctree))
if subtrees:
toplevel[1][:] = subtrees # type: ignore
else:
toplevel.pop(1)
# resolve all sub-toctrees
for sub_toc_node in list(toc.findall(addnodes.toctree)):
if sub_toc_node.get('hidden', False) and not includehidden:
continue
for i, entry in enumerate(
_entries_from_toctree(sub_toc_node, [refdoc] + parents,
subtree=True),
start=sub_toc_node.parent.index(sub_toc_node) + 1
):
sub_toc_node.parent.insert(i, entry)
sub_toc_node.parent.remove(sub_toc_node)
entries.extend(children)
if not subtree:
ret = nodes.bullet_list()
ret += entries
return [ret]
return entries
maxdepth = maxdepth or toctree.get('maxdepth', -1)
if not titles_only and toctree.get('titlesonly', False):
titles_only = True
if not includehidden and toctree.get('includehidden', False):
includehidden = True
tocentries = _entries_from_toctree(toctree, [])
if not tocentries:
return None
newnode = addnodes.compact_paragraph('', '')
caption = toctree.attributes.get('caption')
if caption:
caption_node = nodes.title(caption, '', *[nodes.Text(caption)])
caption_node.line = toctree.line
caption_node.source = toctree.source
caption_node.rawsource = toctree['rawcaption']
if hasattr(toctree, 'uid'):
# move uid to caption_node to translate it
caption_node.uid = toctree.uid # type: ignore
del toctree.uid
newnode += caption_node
newnode.extend(tocentries)
newnode['toctree'] = True
# prune the tree to maxdepth, also set toc depth and current classes
_toctree_add_classes(newnode, 1)
newnode = self._toctree_copy(newnode, 1, maxdepth if prune else 0, collapse)
if isinstance(newnode[-1], nodes.Element) and len(newnode[-1]) == 0: # No titles found
return None
# set the target paths in the toctrees (they are not known at TOC
# generation time)
for refnode in newnode.findall(nodes.reference):
if not url_re.match(refnode['refuri']):
refnode['refuri'] = builder.get_relative_uri(
docname, refnode['refuri']) + refnode['anchorname']
return newnode
def get_toctree_ancestors(self, docname: str) -> list[str]:
parent = {}
for p, children in self.env.toctree_includes.items():
for child in children:
parent[child] = p
ancestors: list[str] = []
d = docname
while d in parent and d not in ancestors:
ancestors.append(d)
d = parent[d]
return ancestors
ET = TypeVar('ET', bound=Element)
def _toctree_copy(self, node: ET, depth: int, maxdepth: int, collapse: bool) -> ET:
"""Utility: Cut and deep-copy a TOC at a specified depth."""
keep_bullet_list_sub_nodes = (depth <= 1
or ((depth <= maxdepth or maxdepth <= 0)
and (not collapse or 'iscurrent' in node)))
copy = node.copy()
for subnode in node.children:
if isinstance(subnode, (addnodes.compact_paragraph, nodes.list_item)):
# for <p> and <li>, just recurse
copy.append(self._toctree_copy(subnode, depth, maxdepth, collapse))
elif isinstance(subnode, nodes.bullet_list):
# for <ul>, copy if the entry is top-level
# or, copy if the depth is within bounds and;
# collapsing is disabled or the sub-entry's parent is 'current'.
# The boolean is constant so is calculated outwith the loop.
if keep_bullet_list_sub_nodes:
copy.append(self._toctree_copy(subnode, depth + 1, maxdepth, collapse))
else:
copy.append(subnode.deepcopy())
return copy
def get_toc_for(self, docname: str, builder: Builder) -> Node:
"""Return a TOC nodetree -- for use on the same page only!"""
tocdepth = self.env.metadata[docname].get('tocdepth', 0)
try:
toc = self._toctree_copy(self.env.tocs[docname], 2, tocdepth, False)
except KeyError:
# the document does not exist anymore: return a dummy node that
# renders to nothing
return nodes.paragraph()
process_only_nodes(toc, builder.tags)
for node in toc.findall(nodes.reference):
node['refuri'] = node['anchorname'] or '#'
return toc
def get_toctree_for(self, docname: str, builder: Builder, collapse: bool,
**kwargs: Any) -> Element | None:
"""Return the global TOC nodetree."""
doctree = self.env.master_doctree
toctrees: list[Element] = []
if 'includehidden' not in kwargs:
kwargs['includehidden'] = True
if 'maxdepth' not in kwargs or not kwargs['maxdepth']:
kwargs['maxdepth'] = 0
else:
kwargs['maxdepth'] = int(kwargs['maxdepth'])
kwargs['collapse'] = collapse
for toctreenode in doctree.findall(addnodes.toctree):
toctree = self.resolve(docname, builder, toctreenode, prune=True, **kwargs)
if toctree:
toctrees.append(toctree)
if not toctrees:
return None
result = toctrees[0]
for toctree in toctrees[1:]:
result.extend(toctree.children)
return result