Merge pull request #1547 from turt2live/travis/c2s/pills

Document how mentions (pills) work
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Travis Ralston 6 years ago committed by GitHub
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Add a common standard for user, room, and group mentions in messages.

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.. Copyright 2016 Openmarket Ltd. .. Copyright 2016 Openmarket Ltd.
.. Copyright 2017 New Vector Ltd. .. Copyright 2017, 2018 New Vector Ltd.
.. ..
.. Licensed under the Apache License, Version 2.0 (the "License"); .. Licensed under the Apache License, Version 2.0 (the "License");
.. you may not use this file except in compliance with the License. .. you may not use this file except in compliance with the License.
@ -283,3 +283,45 @@ domain).
.. TODO-spec .. TODO-spec
- Need to specify precise grammar for Room Aliases. https://matrix.org/jira/browse/SPEC-391 - Need to specify precise grammar for Room Aliases. https://matrix.org/jira/browse/SPEC-391
matrix.to navigation
++++++++++++++++++++
.. NOTE::
This namespacing is in place pending a ``matrix://`` (or similar) URI scheme.
This is **not** meant to be interpreted as an available web service - see
below for more details.
Rooms, users, aliases, and groups may be represented as a "matrix.to" URI.
This URI can be used to reference particular objects in a given context, such
as mentioning a user in a message or linking someone to a particular point
in the room's history (a permalink).
A matrix.to URI has the following format, based upon the specification defined
in RFC 3986:
https://matrix.to/#/<identifier>/<extra parameter>
The identifier may be a room ID, room alias, user ID, or group ID. The extra
parameter is only used in the case of permalinks where an event ID is referenced.
The matrix.to URI, when referenced, must always start with ``https://matrix.to/#/``
followed by the identifier.
Clients should not rely on matrix.to URIs falling back to a web server if accessed
and instead should perform some sort of action within the client. For example, if
the user were to click on a matrix.to URI for a room alias, the client may open
a view for the user to participate in the room.
Examples of matrix.to URIs are:
* Room alias: ``https://matrix.to/#/#somewhere:domain.com``
* Room: ``https://matrix.to/#/!somewhere:domain.com``
* Permalink by room: ``https://matrix.to/#/!somewhere:domain.com/$event:example.org``
* Permalink by room alias: ``https://matrix.to/#/#somewhere:domain.com/$event:example.org``
* User: ``https://matrix.to/#/@alice:example.org``
* Group: ``https://matrix.to/#/+example:domain.com``
.. Note::
Room ID permalinks are unroutable as there is no reliable domain to send requests
to upon receipt of the permalink. Clients should do their best route Room IDs to
where they need to go, however they should also be aware of `issue #1579 <https://github.com/matrix-org/matrix-doc/issues/1579>`_.

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.. Copyright 2018 New Vector Ltd.
..
.. Licensed under the Apache License, Version 2.0 (the "License");
.. you may not use this file except in compliance with the License.
.. You may obtain a copy of the License at
..
.. http://www.apache.org/licenses/LICENSE-2.0
..
.. Unless required by applicable law or agreed to in writing, software
.. distributed under the License is distributed on an "AS IS" BASIS,
.. WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
.. See the License for the specific language governing permissions and
.. limitations under the License.
User, room, and group mentions
==============================
.. _module:mentions:
This module allows users to mention other users, rooms, and groups within
a room message. This is achieved by including a `matrix.to URI`_ in the HTML
body of an `m.room.message`_ event. This module does not have any server-specific
behaviour to it.
Mentions apply only to `m.room.message`_ events where the ``msgtype`` is ``m.text``,
``m.emote``, or ``m.notice``. The ``format`` for the event must be ``org.matrix.custom.html``
and therefore requires a ``formatted_body``.
To make a mention, reference the entity being mentioned in the ``formatted_body``
using an anchor, like so::
{
"body": "Hello Alice!",
"msgtype": "m.text",
"format": "org.matrix.custom.html",
"formatted_body": "Hello <a href='https://matrix.to/#/@alice:example.org'>Alice</a>!"
}
Client behaviour
----------------
In addition to using the appropriate ``matrix.to URI`` for the mention,
clients should use the following guidelines when making mentions in events
to be sent:
* When mentioning users, use the user's potentially ambigious display name for
the anchor's text. If the user does not have a display name, use the user's
ID.
* When mentioning rooms, use the canonical alias for the room. If the room
does not have a canonical alias, prefer one of the aliases listed on the
room. If no alias can be found, fall back to the room ID. In all cases,
use the alias/room ID being linked to as the anchor's text.
* When referencing groups, use the group ID as the anchor's text.
The text component of the anchor should be used in the event's ``body`` where
the mention would normally be represented, as shown in the example above.
Clients should display mentions differently from other elements. For example,
this may be done by changing the background color of the mention to indicate
that it is different from a normal link.
If the current user is mentioned in a message (either by a mention as defined
in this module or by a push rule), the client should show that mention differently
from other mentions, such as by using a red background color to signify to the
user that they were mentioned.
When clicked, the mention should navigate the user to the appropriate room, group,
or user information.
.. _`matrix.to URI`: ../appendices.html#matrix-to-navigation

@ -68,6 +68,7 @@ groups: # reusable blobs of files when prefixed with 'group:'
- modules/third_party_networks.rst - modules/third_party_networks.rst
- modules/openid.rst - modules/openid.rst
- modules/server_acls.rst - modules/server_acls.rst
- modules/mentions.rst
title_styles: ["=", "-", "~", "+", "^", "`", "@", ":"] title_styles: ["=", "-", "~", "+", "^", "`", "@", ":"]

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