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src/platform_impl/linux/wayland/session-management-v1.xml
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| <?xml version="1.0" encoding="UTF-8"?> | ||
| <protocol name="xx_session_management_v1"> | ||
| <copyright> | ||
| Copyright 2018 Mike Blumenkrantz | ||
| Copyright 2018 Samsung Electronics Co., Ltd | ||
| Copyright 2018 Red Hat Inc. | ||
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||
| Permission is hereby granted, free of charge, to any person obtaining a | ||
| copy of this software and associated documentation files (the "Software"), | ||
| to deal in the Software without restriction, including without limitation | ||
| the rights to use, copy, modify, merge, publish, distribute, sublicense, | ||
| and/or sell copies of the Software, and to permit persons to whom the | ||
| Software is furnished to do so, subject to the following conditions: | ||
|
|
||
| The above copyright notice and this permission notice (including the next | ||
| paragraph) shall be included in all copies or substantial portions of the | ||
| Software. | ||
|
|
||
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | ||
| THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | ||
| FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | ||
| DEALINGS IN THE SOFTWARE. | ||
| </copyright> | ||
|
|
||
| <description summary="Protocol for managing application sessions"> | ||
| This description provides a high-level overview of the interplay between | ||
| the interfaces defined this protocol. For details, see the protocol | ||
| specification. | ||
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|
||
| The xx_session_manager protocol declares interfaces necessary to | ||
| allow clients to restore toplevel state from previous executions. The | ||
| xx_session_manager_v1.get_session request can be used to obtain a | ||
| xx_session_v1 resource representing the state of a set of toplevels. | ||
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|
||
| Clients may obtain the session string to use in future calls through | ||
| the xx_session_v1.created event. Compositors will use this string | ||
| as an identifiable token for future runs, possibly storing data about | ||
| the related toplevels in persistent storage. | ||
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||
| Toplevels are managed through the xx_session_v1.add_toplevel and | ||
| xx_session_toplevel_v1.remove pair of requests. Clients will explicitly | ||
| request a toplevel to be restored according to prior state through the | ||
| xx_session_v1.restore_toplevel request before the toplevel is mapped. | ||
|
|
||
| Warning! The protocol described in this file is currently in the testing | ||
| phase. Backward compatible changes may be added together with the | ||
| corresponding interface version bump. Backward incompatible changes can | ||
| only be done by creating a new major version of the extension. | ||
| </description> | ||
|
|
||
| <interface name="xx_session_manager_v1" version="1"> | ||
| <description summary="manage sessions for applications"> | ||
| The xx_session_manager interface defines base requests for creating and | ||
| managing a session for an application. Sessions persist across application | ||
| and compositor restarts unless explicitly destroyed. A session is created | ||
| for the purpose of maintaining an application's xdg_toplevel surfaces | ||
| across compositor or application restarts. The compositor should remember | ||
| as many states as possible for surfaces in a given session, but there is | ||
| no requirement for which states must be remembered. | ||
| </description> | ||
|
|
||
| <enum name="error"> | ||
| <entry name="in_use" summary="a requested session is already in use" | ||
| value="1"/> | ||
| </enum> | ||
|
|
||
| <enum name="reason"> | ||
| <description summary="reason for getting a session"> | ||
| The reason may determine in what way a session restores the window | ||
| management state of associated toplevels. | ||
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||
| For example newly launched applications might be launched on the active | ||
| workspace with restored size and position, while a recovered | ||
| applications might restore additional state such as active workspace and | ||
| stacking order. | ||
| </description> | ||
| <entry name="launch" value="1"> | ||
| <description summary="an app is newly launched"> | ||
| A new app instance is launched, for example from an app launcher. | ||
| </description> | ||
| </entry> | ||
| <entry name="recover" value="2"> | ||
| <description summary="an app recovered"> | ||
| A app instance is recovering from for example a compositor or app crash. | ||
| </description> | ||
| </entry> | ||
| <entry name="session_restore" value="3"> | ||
| <description summary="an app restored"> | ||
| A app instance is restored, for example part of a restored session, or | ||
| restored from having been temporarily terminated due to resource | ||
| constraints. | ||
| </description> | ||
| </entry> | ||
| </enum> | ||
|
|
||
| <request name="destroy" type="destructor"> | ||
| <description summary="Destroy this object"> | ||
| This has no effect other than to destroy the xx_session_manager object. | ||
| </description> | ||
| </request> | ||
|
|
||
| <request name="get_session"> | ||
| <description summary="create or restore a session"> | ||
| Create a session object corresponding to either an existing session | ||
| identified by the given session identifier string or a new session. | ||
| While the session object exists, the session is considered to be "in | ||
| use". | ||
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|
||
| If a identifier string represents a session that is currently actively | ||
| in use by the the same client, an 'in_use' error is raised. If some | ||
| other client is currently using the same session, the new session will | ||
| replace managing the associated state. | ||
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|
||
| NULL is passed to initiate a new session. If an id is passed which does | ||
| not represent a valid session, the compositor treats it as if NULL had | ||
| been passed. | ||
|
|
||
| A client is allowed to have any number of in use sessions at the same | ||
| time. | ||
| </description> | ||
| <arg name="id" type="new_id" interface="xx_session_v1"/> | ||
| <arg name="reason" type="uint" enum="reason" | ||
| summary="reason for session"/> | ||
| <arg name="session" type="string" | ||
| summary="the session to restore" | ||
| allow-null="true"/> | ||
| </request> | ||
| </interface> | ||
|
|
||
| <interface name="xx_session_v1" version="1"> | ||
| <description summary="A session for an application"> | ||
| A xx_session_v1 object represents a session for an application. While the | ||
| object exists, all surfaces which have been added to the session will | ||
| have states stored by the compositor which can be reapplied at a later | ||
| time. Two sessions cannot exist for the same identifier string. | ||
|
|
||
| States for surfaces added to a session are automatically updated by the | ||
| compositor when they are changed. | ||
|
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| Surfaces which have been added to a session are automatically removed from | ||
| the session if xdg_toplevel.destroy is called for the surface. | ||
| </description> | ||
|
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||
| <enum name="error"> | ||
| <entry name="invalid_restore" | ||
| summary="restore cannot be performed after initial toplevel commit" | ||
| value="1"/> | ||
| <entry name="name_in_use" | ||
| summary="toplevel name is already in used" | ||
| value="2"/> | ||
| <entry name="already_mapped" | ||
| summary="toplevel was already mapped when restored" | ||
| value="3"/> | ||
| </enum> | ||
|
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||
| <request name="destroy" type="destructor"> | ||
| <description summary="Destroy the session"> | ||
| Destroy a session object, preserving the current state but not continuing | ||
| to make further updates if state changes occur. This makes the associated | ||
| xx_toplevel_session_v1 objects inert. | ||
| </description> | ||
| </request> | ||
|
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||
| <request name="remove" type="destructor"> | ||
| <description summary="Remove the session"> | ||
| Remove the session, making it no longer available for restoration. A | ||
| compositor should in response to this request remove the data related to | ||
| this session from its storage. | ||
| </description> | ||
| </request> | ||
|
|
||
| <request name="add_toplevel"> | ||
| <description summary="add a new surface to the session"> | ||
| Attempt to add a given surface to the session. The passed name is used | ||
| to identify what window is being restored, and may be used store window | ||
| specific state within the session. | ||
|
|
||
| Calling this with a toplevel that is already managed by the session with | ||
| the same associated will raise an in_use error. | ||
| </description> | ||
| <arg name="id" type="new_id" interface="xx_toplevel_session_v1"/> | ||
| <arg name="toplevel" type="object" interface="xdg_toplevel"/> | ||
| <arg name="name" type="string"/> | ||
| </request> | ||
|
|
||
| <request name="restore_toplevel"> | ||
| <description summary="restore a surface state"> | ||
| Inform the compositor that the toplevel associated with the passed name | ||
| should have its window management state restored. | ||
|
|
||
| Calling this with a toplevel that is already managed by the session with | ||
| the same associated will raise an in_use error. | ||
|
|
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| This request must be called prior to the first commit on the associated | ||
| wl_surface, otherwise an already_mapped error is raised. | ||
|
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| As part of the initial configure sequence, if the toplevel was | ||
| successfully restored, a xx_toplevel_session_v1.restored event is | ||
| emitted. See the xx_toplevel_session_v1.restored event for further | ||
| details. | ||
| </description> | ||
| <arg name="id" type="new_id" interface="xx_toplevel_session_v1"/> | ||
| <arg name="toplevel" type="object" interface="xdg_toplevel"/> | ||
| <arg name="name" type="string"/> | ||
| </request> | ||
|
|
||
| <event name="created"> | ||
| <description summary="newly-created session id"> | ||
| Emitted at most once some time after getting a new session object. It | ||
| means that no previous state was restored, and a new session was created. | ||
| The passed id can be used to restore previous sessions. | ||
| </description> | ||
| <arg name="id" type="string"/> | ||
| </event> | ||
|
|
||
| <event name="restored"> | ||
| <description summary="the session has been restored"> | ||
| Emitted at most once some time after getting a new session object. It | ||
| means that previous state was at least partially restored. The same id | ||
| can again be used to restore previous sessions. | ||
| </description> | ||
| </event> | ||
|
|
||
| <event name="replaced"> | ||
| <description summary="the session has been restored"> | ||
| Emitted at most once, if the session was taken over by some other | ||
| client. When this happens, the session and all its toplevel session | ||
| objects become inert, and should be destroyed. | ||
| </description> | ||
| </event> | ||
| </interface> | ||
|
|
||
| <interface name="xx_toplevel_session_v1" version="1"> | ||
| <request name="destroy" type="destructor"> | ||
| <description summary="Destroy the object"> | ||
| Destroy the object. This has no effect window management of the | ||
| associated toplevel. | ||
| </description> | ||
| </request> | ||
|
|
||
| <request name="remove" type="destructor"> | ||
| <description summary="remove a surface from the session"> | ||
| Remove a specified surface from the session and render any corresponding | ||
| xx_toplevel_session_v1 object inert. The compositor should remove any | ||
| data related to the toplevel in the corresponding session from its internal | ||
| storage. | ||
| </description> | ||
| </request> | ||
|
|
||
| <event name="restored"> | ||
| <description summary="a toplevel's session has been restored"> | ||
| The "restored" event is emitted prior to the first | ||
| xdg_toplevel.configure for the toplevel. It will only be emitted after | ||
| xx_session_v1.restore_toplevel, and the initial empty surface state has | ||
| been applied, and it indicates that the surface's session is being | ||
| restored with this configure event. | ||
| </description> | ||
| <arg name="surface" type="object" interface="xdg_toplevel"/> | ||
| </event> | ||
| </interface> | ||
| </protocol> |
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