Fix `:paramtype:` reference targets (#11964)

CHANGES.rst

@@ -77,6 +77,8 @@ Bugs fixed
 * #11925: Blacklist the ``sphinxprettysearchresults`` extension; the functionality
   it provides was merged into Sphinx v2.0.0.
   Patch by James Addison.
+* #11962: Fix target resolution when using ``:paramtype:`` fields.
+  Patch by Bénédikt Tran.
 
 Testing
 -------

sphinx/ext/napoleon/__init__.py

@@ -339,7 +339,7 @@ def _patch_python_domain() -> None:
     PyObject.doc_field_types.append(
         PyTypedField('keyword', label=_('Keyword Arguments'),
                      names=('keyword', 'kwarg', 'kwparam'),
-                     typerolename='obj', typenames=('paramtype', 'kwtype'),
+                     typerolename='class', typenames=('paramtype', 'kwtype'),
                      can_collapse=True))
 
 

tests/roots/test-ext-napoleon-paramtype/conf.py

@@ -0,0 +1,15 @@
+import os
+import sys
+
+sys.path.insert(0, os.path.abspath('.'))
+extensions = [
+    'sphinx.ext.autodoc',
+    'sphinx.ext.napoleon',
+    'sphinx.ext.intersphinx'
+]
+
+# Python inventory is manually created in the test
+# in order to avoid creating a real HTTP connection
+intersphinx_mapping = {}
+intersphinx_cache_limit = 0
+intersphinx_disabled_reftypes = []

tests/roots/test-ext-napoleon-paramtype/index.rst

@@ -0,0 +1,8 @@
+test-ext-napoleon
+=================
+
+.. automodule:: pkg.bar
+   :members:
+
+.. automodule:: pkg.foo
+   :members:

tests/roots/test-ext-napoleon-paramtype/pkg/bar.py

@@ -0,0 +1,10 @@
+class Bar:
+    """The bar."""
+    def list(self) -> None:
+        """A list method."""
+
+    @staticmethod
+    def int() -> float:
+        """An int method."""
+        return 1.0
+

tests/roots/test-ext-napoleon-paramtype/pkg/foo.py

@@ -0,0 +1,27 @@
+class Foo:
+    """The foo."""
+    def do(
+        self,
+        *,
+        keyword_paramtype,
+        keyword_kwtype,
+        kwarg_paramtype,
+        kwarg_kwtype,
+        kwparam_paramtype,
+        kwparam_kwtype,
+    ):
+        """Some method.
+
+        :keyword keyword_paramtype: some param
+        :paramtype keyword_paramtype: list[int]
+        :keyword keyword_kwtype: some param
+        :kwtype keyword_kwtype: list[int]
+        :kwarg kwarg_paramtype: some param
+        :paramtype kwarg_paramtype: list[int]
+        :kwarg kwarg_kwtype: some param
+        :kwtype kwarg_kwtype: list[int]
+        :kwparam kwparam_paramtype: some param
+        :paramtype kwparam_paramtype: list[int]
+        :kwparam kwparam_kwtype: some param
+        :kwtype kwparam_kwtype: list[int]
+        """

tests/test_extensions/test_ext_napoleon_docstring.py

@@ -1,13 +1,17 @@
 """Tests for :mod:`sphinx.ext.napoleon.docstring` module."""
 
 import re
+import zlib
 from collections import namedtuple
 from inspect import cleandoc
+from itertools import product
 from textwrap import dedent
 from unittest import mock
 
 import pytest
+from html5lib import HTMLParser
 
+from sphinx.ext.intersphinx import load_mappings, normalize_intersphinx_mapping
 from sphinx.ext.napoleon import Config
 from sphinx.ext.napoleon.docstring import (
     GoogleDocstring,
@@ -2659,3 +2663,42 @@ def test_napoleon_and_autodoc_typehints_description_documented_params(app, statu
         '\n'
         '      * ****kwargs** (*int*) -- Extra arguments.\n'
     )
+
+
+@pytest.mark.sphinx('html', testroot='ext-napoleon-paramtype', freshenv=True)
+def test_napoleon_keyword_and_paramtype(app, tmp_path):
+    inv_file = tmp_path / 'objects.inv'
+    inv_file.write_bytes(b'''\
+# Sphinx inventory version 2
+# Project: Intersphinx Test
+# Version: 42
+# The remainder of this file is compressed using zlib.
+''' + zlib.compress(b'''\
+None py:data 1 none.html -
+list py:class 1 list.html -
+int py:class 1 int.html -
+'''))  # NoQA: W291
+    app.config.intersphinx_mapping = {'python': ('127.0.0.1:5555', str(inv_file))}
+    normalize_intersphinx_mapping(app, app.config)
+    load_mappings(app)
+
+    app.build(force_all=True)
+
+    buffer = (app.outdir / 'index.html').read_bytes()
+    etree = HTMLParser(namespaceHTMLElements=False).parse(buffer)
+
+    for name, typename in product(('keyword', 'kwarg', 'kwparam'), ('paramtype', 'kwtype')):
+        param = f'{name}_{typename}'
+        li_ = list(etree.findall(f'.//li/p/strong[.="{param}"]/../..'))
+        assert len(li_) == 1
+        li = li_[0]
+
+        text = li.text or ''.join(li.itertext())
+        assert text == f'{param} (list[int]) \u2013 some param'
+
+        a_ = list(li.findall('.//a[@class="reference external"]'))
+
+        assert len(a_) == 2
+        for a, uri in zip(a_, ('list.html', 'int.html')):
+            assert a.attrib['href'] == f'127.0.0.1:5555/{uri}'
+            assert a.attrib['title'] == '(in Intersphinx Test v42)'