Fixed #34622 -- Improved accessibility of related widget wrapper in admin.

This improves accessibility for screen reader users by adding
"aria-disabled" and removing "alt".

Thanks Thibaud Colas for the report.

django/contrib/admin/static/admin/js/admin/RelatedObjectLookups.js

@@ -79,9 +79,11 @@
             siblings.each(function() {
                 const elm = $(this);
                 elm.attr('href', elm.attr('data-href-template').replace('__fk__', value));
+                elm.removeAttr('aria-disabled');
             });
         } else {
             siblings.removeAttr('href');
+            siblings.attr('aria-disabled', true);
         }
     }
 

django/contrib/admin/templates/admin/widgets/related_widget_wrapper.html

@@ -9,7 +9,7 @@
             data-href-template="{{ change_related_template_url }}?{{ url_params }}"
             data-popup="yes"
             title="{% blocktranslate %}Change selected {{ model }}{% endblocktranslate %}">
-            <img src="{% static 'admin/img/icon-changelink.svg' %}" alt="{% translate 'Change' %}">
+            <img src="{% static 'admin/img/icon-changelink.svg' %}" alt="">
         </a>
         {% endif %}
         {% if can_add_related %}
@@ -17,7 +17,7 @@
             data-popup="yes"
             href="{{ add_related_url }}?{{ url_params }}"
             title="{% blocktranslate %}Add another {{ model }}{% endblocktranslate %}">
-            <img src="{% static 'admin/img/icon-addlink.svg' %}" alt="{% translate 'Add' %}">
+            <img src="{% static 'admin/img/icon-addlink.svg' %}" alt="">
         </a>
         {% endif %}
         {% if can_delete_related %}
@@ -25,14 +25,14 @@
             data-href-template="{{ delete_related_template_url }}?{{ url_params }}"
             data-popup="yes"
             title="{% blocktranslate %}Delete selected {{ model }}{% endblocktranslate %}">
-            <img src="{% static 'admin/img/icon-deletelink.svg' %}" alt="{% translate 'Delete' %}">
+            <img src="{% static 'admin/img/icon-deletelink.svg' %}" alt="">
         </a>
         {% endif %}
         {% if can_view_related %}
           <a class="related-widget-wrapper-link view-related" id="view_id_{{ name }}"
              data-href-template="{{ change_related_template_url }}?{{ view_related_url_params }}"
              title="{% blocktranslate %}View selected {{ model }}{% endblocktranslate %}">
-            <img src="{% static 'admin/img/icon-viewlink.svg' %}" alt="{% translate 'View' %}">
+            <img src="{% static 'admin/img/icon-viewlink.svg' %}" alt="">
           </a>
         {% endif %}
         {% endif %}

tests/admin_views/test_related_object_lookups.py

@@ -0,0 +1,76 @@
+from django.contrib.admin.tests import AdminSeleniumTestCase
+from django.contrib.auth.models import User
+from django.test import override_settings
+from django.urls import reverse
+
+
+@override_settings(ROOT_URLCONF="admin_views.urls")
+class SeleniumTests(AdminSeleniumTestCase):
+    available_apps = ["admin_views"] + AdminSeleniumTestCase.available_apps
+
+    def setUp(self):
+        self.superuser = User.objects.create_superuser(
+            username="super", password="secret", email="super@example.com"
+        )
+        self.admin_login(
+            username="super", password="secret", login_url=reverse("admin:index")
+        )
+
+    def test_related_object_link_images_empty_alt(self):
+        from selenium.webdriver.common.by import By
+
+        album_add_url = reverse("admin:admin_views_album_add")
+        self.selenium.get(self.live_server_url + album_add_url)
+
+        tests = [
+            "add_id_owner",
+            "change_id_owner",
+            "delete_id_owner",
+            "view_id_owner",
+        ]
+        for link_id in tests:
+            with self.subTest(link_id):
+                link_image = self.selenium.find_element(
+                    By.XPATH, f'//*[@id="{link_id}"]/img'
+                )
+                self.assertEqual(link_image.get_attribute("alt"), "")
+
+    def test_related_object_lookup_link_initial_state(self):
+        from selenium.webdriver.common.by import By
+
+        album_add_url = reverse("admin:admin_views_album_add")
+        self.selenium.get(self.live_server_url + album_add_url)
+
+        tests = [
+            "change_id_owner",
+            "delete_id_owner",
+            "view_id_owner",
+        ]
+        for link_id in tests:
+            with self.subTest(link_id):
+                link = self.selenium.find_element(By.XPATH, f'//*[@id="{link_id}"]')
+                self.assertEqual(link.get_attribute("aria-disabled"), "true")
+
+    def test_related_object_lookup_link_enabled(self):
+        from selenium.webdriver.common.by import By
+        from selenium.webdriver.support.select import Select
+
+        album_add_url = reverse("admin:admin_views_album_add")
+        self.selenium.get(self.live_server_url + album_add_url)
+
+        select_element = self.selenium.find_element(By.XPATH, '//*[@id="id_owner"]')
+        option = Select(select_element).options[-1]
+        self.assertEqual(option.text, "super")
+        select_element.click()
+        option.click()
+
+        tests = [
+            "add_id_owner",
+            "change_id_owner",
+            "delete_id_owner",
+            "view_id_owner",
+        ]
+        for link_id in tests:
+            with self.subTest(link_id):
+                link = self.selenium.find_element(By.XPATH, f'//*[@id="{link_id}"]')
+                self.assertIsNone(link.get_attribute("aria-disabled"))