|
|
|
|
|
|
|
|
|
### Typing Notifications
|
|
|
|
|
|
|
|
|
|
Users may wish to be informed when another user is typing in a room.
|
|
|
|
|
This can be achieved using typing notifications. These are ephemeral
|
|
|
|
|
events, so they do not form part of the
|
|
|
|
|
[Event Graph](/#event-graphs). Typing notifications are scoped
|
|
|
|
|
to a room.
|
|
|
|
|
|
|
|
|
|
#### Events
|
|
|
|
|
|
|
|
|
|
{{% event event="m.typing" %}}
|
|
|
|
|
|
|
|
|
|
#### Client behaviour
|
|
|
|
|
|
|
|
|
|
When a client receives an `m.typing` event, it MUST use the user ID list
|
|
|
|
|
to **REPLACE** its knowledge of every user who is currently typing. The
|
|
|
|
|
reason for this is that the server *does not remember* users who are not
|
|
|
|
|
currently typing as that list gets big quickly. The client should mark
|
|
|
|
|
as not typing any user ID who is not in that list.
|
|
|
|
|
|
|
|
|
|
It is recommended that clients store a `boolean` indicating whether the
|
|
|
|
|
user is typing or not. Whilst this value is `true` a timer should fire
|
|
|
|
|
periodically every N seconds to send a typing HTTP request. The value of
|
|
|
|
|
N is recommended to be no more than 20-30 seconds. This request should
|
|
|
|
|
be re-sent by the client to continue informing the server the user is
|
|
|
|
|
still typing. As subsequent requests will replace older requests, a
|
|
|
|
|
safety margin of 5 seconds before the expected timeout runs out is
|
|
|
|
|
recommended. When the user stops typing, the state change of the
|
|
|
|
|
`boolean` to `false` should trigger another HTTP request to inform the
|
|
|
|
|
server that the user has stopped typing.
|
|
|
|
|
|
|
|
|
|
{{% http-api spec="client-server" api="typing" %}}
|
|
|
|
|
|
|
|
|
|
#### Security considerations
|
|
|
|
|
|
|
|
|
|
Clients may not wish to inform everyone in a room that they are typing
|
|
|
|
|
and instead only specific users in the room.
|
