Also respond about urgency support in the query response

docs/desktop-notifications.rst

@@ -115,12 +115,16 @@ implementation supports. Currently, the following keys are defined:
 Key      Value
 =======  ================================================================================
 ``a``    Comma separated list of actions from the ``a`` key that the terminal
-         implements. If no actions are supported, the ``a`` key must be absent form the
+         implements. If no actions are supported, the ``a`` key must be absent from the
          query response.
 
 ``o``    Comma separated list of occassions from the ``o`` key that the
          terminal implements. If no occassions are supported, the value
          ``o=always`` must be sent in the query response.
+
+``u``    Comma separated list of urgency values that the terminal implements.
+         If urgency is not supported, the ``u`` key must be absent from the
+         query response.
 =======  ================================================================================
 
 In the future, if this protocol expands, more keys might be added. Clients must

kitty/notify.py

@@ -143,7 +143,8 @@ def parse_osc_99(raw: str) -> NotificationCommand:
     if metadata == '?':
         actions = ','.join(x.name for x in Action)
         when = ','.join(x.name for x in OnlyWhen if x.value)
-        raise QueryResponse(f'99;?;a={actions}:o={when}')
+        urgency = ','.join(str(x.value) for x in Urgency)
+        raise QueryResponse(f'99;?;a={actions}:o={when}:u={urgency}')
     payload_is_encoded = False
     payload_type = 'title'
     if metadata:

kitty_tests/parser.py

@@ -590,7 +590,7 @@ def activated(identifier, window_id, focus, report):
         reset()
         h('?')
         self.assertFalse(notifications)
-        self.ae(query_responses, ['99;?;a=focus,report:o=always,unfocused,invisible'])
+        self.ae(query_responses, ['99;?;a=focus,report:o=always,unfocused,invisible:u=0,1,2'])
 
     def test_dcs_codes(self):
         s = self.create_screen()