Copyright © 2020 Collabora, Ltd. 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. This extension can be used by regular application to instruct to compositor to activate or switch to other running (regular) applications. The client is responsbile for filtering their own app_id when receiving application id. Note that other (regular) applications can bind to this interface and there is no mechanism to place to restrict or limit that. The compositor may choose to advertise one or more application ids which can be used to activate/switch to. When this global is bound, the compositor will send all application ids available for activation, but may send additional application id at any time (when they've been mapped in the compositor). Ask the compositor to make a toplevel to become the current/focused window for window management purposes. See xdg_toplevel.set_app_id from the xdg-shell protocol for a description of app_id.