list toplevels and properties thereof

The purpose of this protocol is to enable clients such as taskbars or docks to access a list of opened applications and basic properties thereof.

The secondary purpose of this protocol is to provide protocol object handles for toplevels which may be used to address said toplevels in other protocols (e.g. to target a toplevel for screencopy).

After a client binds the zcosmic_toplevel_info_v1, each opened toplevel window will be sent via the toplevel event

stop()
stop sending events

This request indicates that the client no longer wishes to receive events for new toplevels. However, the compositor may emit further toplevel_created events until the finished event is emitted.

The client must not send any more requests after this one.

Argument
Type
Description
toplevelnew_id<zcosmic_toplevel_handle_v1>
a toplevel has been created

This event is emitted whenever a new toplevel window is created. It is emitted for all toplevels, regardless of the app that has created them.

All initial properties of the toplevel (title, app_id, states, etc.) will be sent immediately after this event via the corresponding events in zcosmic_toplevel_handle_v1.

finished()
the compositor has finished with the toplevel manager

This event indicates that the compositor is done sending events to the zcosmic_toplevel_info_v1. The server will destroy the object immediately after sending this request, so it will become invalid and the client should free any resources associated with it.


an open toplevel

A zcosmic_toplevel_handle_v1 object represents an open toplevel window. A single app may have multiple open toplevels.

Each toplevel has a list of outputs it is visible on, exposed to the client via the output_enter and output_leave events.

destroy()
destroy the zcosmic_toplevel_handle_v1 object

This request should be called either when the client will no longer use the zcosmic_toplevel_handle_v1 or after the closed event has been received to allow destruction of the object.

closed()
the toplevel has been closed

The server will emit no further events on the zcosmic_toplevel_handle_v1 after this event. Any requests received aside from the destroy request will be ignored. Upon receiving this event, the client should make the destroy request to allow freeing of resources.

done()
all information about the toplevel has been sent

This event is sent after all changes in the toplevel state have been sent.

This allows changes to the zcosmic_toplevel_handle_v1 properties to be seen as atomic, even if they happen via multiple events.

Note: this is is not sent after the closed event.

title(title: string)
Argument
Type
Description
titlestring
title change

This event is emitted whenever the title of the toplevel changes.

app_id(app_id: string)
Argument
Type
Description
app_idstring
app_id change

This event is emitted whenever the app_id of the toplevel changes.

output_enter(output: object<wl_output>)
Argument
Type
Description
outputobject<wl_output>
toplevel entered an output

This event is emitted whenever the toplevel becomes visible on the given output. A toplevel may be visible on multiple outputs.

output_leave(output: object<wl_output>)
Argument
Type
Description
outputobject<wl_output>
toplevel left an output

This event is emitted whenever the toplevel is no longer visible on a given output. It is guaranteed that an output_enter event with the same output has been emitted before this event.

workspace_enter(workspace: object<zcosmic_workspace_handle_v1>)
Argument
Type
Description
workspaceobject<zcosmic_workspace_handle_v1>
toplevel entered an workspace

This event is emitted whenever the toplevel becomes visible on the given workspace. A toplevel may be visible on multiple workspaces.

workspace_leave(workspace: object<zcosmic_workspace_handle_v1>)
Argument
Type
Description
workspaceobject<zcosmic_workspace_handle_v1>
toplevel left an workspace

This event is emitted whenever the toplevel is no longer visible on a given workspace. It is guaranteed that an workspace_enter event with the same workspace has been emitted before this event.

state(state: array)
Argument
Type
Description
statearray
the toplevel state changed

This event is emitted once on creation of the zcosmic_toplevel_handle_v1 and again whenever the state of the toplevel changes.

Argument
Value
Description
maximized0
the toplevel is maximized
minimized1
the toplevel is minimized
activated2
the toplevel is active
fullscreen3
the toplevel is fullscreen
types of states on the toplevel

The different states that a toplevel may have. These have the same meaning as the states with the same names defined in xdg-toplevel


Compositor Support

Mutter
Mutter
46
KWin
KWin
6.2
Sway
Sway
1.9
COSMIC
COSMIC
1.0.0
Hyprland
Hyprland
0.42.0
niri
0.1.8
Weston
Weston
13
Mir
Mir
2.19
GameScope
GameScope
3.15.14
Jay
1.7.0
zcosmic_toplevel_info_v1
x
x
x
1
x
x
x
x
x
x

Copyright © 2018 Ilia Bozhinov Copyright © 2020 Isaac Freund Copytight © 2022 Victoria Brekenfeld

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