Report if close events are supported in the query response

docs/desktop-notifications.rst

@@ -99,6 +99,9 @@ to display it based on what it does understand.
 Being informed when a notification is closed
 ------------------------------------------------
 
+.. versionadded:: 0.36.0
+   Notifications of close events were added in kitty version 0.36.0
+
 If you wish to be informed when a notification is closed, you can specify
 ``c=1`` when sending the notification. For example::
 
@@ -113,6 +116,12 @@ If no notification id was specified ``i=0`` will be used.
 If ``a=report`` is specified and the notification is activated/clicked on
 then both the activation report and close notification are sent.
 
+.. note::
+   Close events are best effort, some platforms such as macOS do not have
+   events when notifications are closed. Applications can use the
+   :ref:`notifications_query` to check if close events are supported
+   by the current terminal emulator.
+
 
 Closing an existing notification
 ----------------------------------
@@ -128,6 +137,8 @@ This will close a previous notification with the specified id. If no such
 notification exists (perhaps because it was already closed or it was activated)
 then the request is ignored.
 
+.. _notifications_query:
+
 Querying for support
 -------------------------
 
@@ -167,6 +178,9 @@ Key      Value
 ``p``    Comma spearated list of supported payload types (i.e. values of the
          ``p`` key that the terminal implements). These must contain at least
          ``title`` and ``body``.
+
+``c``    ``c=1`` if the terminal supports close events, otherwise the ``c``
+         must be omitted.
 =======  ================================================================================
 
 In the future, if this protocol expands, more keys might be added. Clients must

kitty/notifications.py

@@ -249,6 +249,8 @@ class NotificationCommand:
 
 class DesktopIntegration:
 
+    supports_close_events: bool = True
+
     def __init__(self, notification_manager: 'NotificationManager'):
         self.notification_manager = notification_manager
         self.initialize()
@@ -274,9 +276,20 @@ class DesktopIntegration:
         from .update_check import notification_activated
         notification_activated()
 
+    def query_response(self, identifier: str) -> str:
+        actions = ','.join(x.value for x in Action)
+        when = ','.join(x.value for x in OnlyWhen if x.value)
+        urgency = ','.join(str(x.value) for x in Urgency)
+        i = f'i={identifier or "0"}:'
+        p = ','.join(x.value for x in PayloadType if x.value)
+        c = ':c=1' if self.supports_close_events else ''
+        return f'99;{i}p=?;a={actions}:o={when}:u={urgency}:p={p}{c}'
+
 
 class MacOSIntegration(DesktopIntegration):
 
+    supports_close_events: bool = False
+
     def initialize(self) -> None:
         from .fast_data_types import cocoa_set_notification_activated_callback
         self.id_counter = count(start=1)
@@ -543,7 +556,9 @@ class NotificationManager:
             _, cmd = self.in_progress_notification_commands.popitem(False)
             self.in_progress_notification_commands_by_client_id.pop(cmd.identifier, None)
 
-    def parse_notification_cmd(self, prev_cmd: NotificationCommand, channel_id: int, raw: str) -> Optional[NotificationCommand]:
+    def parse_notification_cmd(
+        self, prev_cmd: NotificationCommand, channel_id: int, raw: str
+    ) -> Optional[NotificationCommand]:
         metadata, payload = raw.partition(';')[::2]
         cmd = NotificationCommand()
         try:
@@ -552,12 +567,7 @@ class NotificationManager:
             self.log('Malformed metadata section in OSC 99: ' + metadata)
             return None
         if payload_type is PayloadType.query:
-            actions = ','.join(x.value for x in Action)
-            when = ','.join(x.value for x in OnlyWhen if x.value)
-            urgency = ','.join(str(x.value) for x in Urgency)
-            i = f'i={cmd.identifier or "0"}:'
-            p = ','.join(x.value for x in PayloadType if x.value)
-            self.channel.send(channel_id, f'99;{i}p=?;a={actions}:o={when}:u={urgency}:p={p}')
+            self.channel.send(channel_id, self.desktop_integration.query_response(cmd.identifier))
             return None
         if payload_type is PayloadType.close:
             if cmd.identifier:

kitty_tests/notifications.py

@@ -204,7 +204,7 @@ def do_test(self: 'TestNotifications') -> None:
     # Test querying
     h('i=xyz:p=?')
     self.assertFalse(di.notifications)
-    qr = 'a=focus,report:o=always,unfocused,invisible:u=0,1,2:p=title,body,?,close'
+    qr = 'a=focus,report:o=always,unfocused,invisible:u=0,1,2:p=title,body,?,close:c=1'
     self.ae(ch.responses, [f'99;i=xyz:p=?;{qr}'])
     reset()
     h('p=?')