diff --git a/specification/modules/instant_messaging.rst b/specification/modules/instant_messaging.rst index 86daa700..dd3e9c6c 100644 --- a/specification/modules/instant_messaging.rst +++ b/specification/modules/instant_messaging.rst @@ -278,70 +278,42 @@ choose a name: #. If the room has an `m.room.canonical_alias`_ state event with a non-empty ``alias`` field, use the alias given by that field as the name. -#. If neither of the above conditions are met, a name should be composed based - on the members of the room. Clients should consider `m.room.member`_ events - for users other than the logged-in user, with ``membership: join`` or - ``membership: invite``. - - .. _active_members: - - i. If there is only one such event, the display name for the room should be - the `disambiguated display name`_ of the corresponding user. - - #. If there are two such events, they should be lexicographically sorted by - their ``state_key`` (i.e. the corresponding user IDs), and the display - name for the room should be the `disambiguated display name`_ of both - users: " and ", or a localised variant thereof. - - #. If there are three or more such events, the display name for the room - should be based on the disambiguated display name of the user - corresponding to the first such event, under a lexicographical sorting - according to their ``state_key``. The display name should be in the - format " and others" (or a localised variant thereof), where N - is the number of `m.room.member`_ events with ``membership: join`` or - ``membership: invite``, excluding the logged-in user and "user1". - - For example, if Alice joins a room, where Bob (whose user id is - ``@superuser:example.com``), Carol (user id ``@carol:example.com``) and - Dan (user id ``@dan:matrix.org``) are in conversation, Alice's - client should show the room name as "Carol and 2 others". - - .. TODO-spec - Sorting by user_id certainly isn't ideal, as IDs at the start of the - alphabet will end up dominating room names: they will all be called - "Arathorn and 15 others". Furthermore - user_ids are not necessarily - ASCII, which means we need to either specify a collation order, or specify - how to choose one. - - Ideally we might sort by the time when the user was first invited to, or - first joined the room. But we don't have this information. - - See https://matrix.org/jira/browse/SPEC-267 for further discussion. - -#. If the room has no valid ``m.room.name`` or ``m.room.canonical_alias`` - event, and no active members other than the current user, clients should - consider ``m.room.member`` events with ``membership: leave``. If such events - exist, a display name such as "Empty room (was and others)" (or - a localised variant thereof) should be used, following similar rules as for - active members (see `above `_). - -#. A complete absence of room name, canonical alias, and room members is likely - to indicate a problem with creating the room or synchronising the state - table; however clients should still handle this situation. A display name - such as "Empty room" (or a localised variant thereof) should be used in this - situation. - -.. _`disambiguated display name`: `Calculating the display name for a user`_ - -Clients SHOULD NOT use `m.room.aliases`_ events as a source for room names, as -it is difficult for clients to agree on the best alias to use, and aliases can -change unexpectedly. - -.. TODO-spec - How can we make this less painful for clients to implement, without forcing - an English-language implementation on them all? See - https://matrix.org/jira/browse/SPEC-425. +#. If neither of the above conditions are met, the client can optionally guess + an alias from the ``m.room.alias`` events in the room. This is a temporary + measure while clients do not promote canonical aliases as prominently. This + step may be removed in a future version of the specification. +#. If none of the above conditions are met, a name should be composed based + on the members of the room. Clients should consider `m.room.member`_ events + for users other than the logged-in user, as defined below. + + i. If the ``m.heroes`` for the room are greater or equal to + ``m.joined_member_count + m.invited_member_count - 1``, then use the + membership events for the heroes to calculate display names for the + users (`disambiguating them if required`_) and concatenating them. For + example, the client may choose to show "Alice, Bob, and Charlie + (@charlie:example.org)" as the room name. The client may optionally + limit the number + + #. If there are fewer heroes than ``m.joined_member_count + m.invited_member_count + - 1``, and ``m.joined_member_count + m.invited_member_count`` is greater + than 1, the client should use the heroes to calculate display names for + the users (`disambiguating them if required`_) and concatenating them + alongside a count of the remaining users. For example, "Alice, Bob, and + 1234 others". + + #. If ``m.joined_member_count + m.invited_member_count`` is less than or + equal to 1 (indicating the member is alone), the client should use the + rules above to indicate that the room was empty. For example, "Empty + Room (was Alice)", "Empty Room (was Alice and 1234 others)", or + "Empty Room" if there are no heroes. + +Clients SHOULD internationalise the room name to the user's language when using +the ``m.heroes`` to calculate the name. Clients SHOULD use minimum 5 heroes to +calculate room names where possible, but may use more or less to fit better with +their user experience. + +.. _`disambiguating them if required`: `Calculating the display name for a user`_ Forming relationships between events ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~