Summary:
With GTK applications our code showed issues. With GTK the sequence for
a menu or dialog window is:
1. create surface
2. create server side decoration
3. request csd
4. create xdg_shell_surface
Which result in KWin to have the ServerSideDecoration object being
created before the ShellClient is created. The connect for mode changed
happens in ShellClient, which is too late to catch that the window
requested client side decoration. Thus KWin created a decoration about
things such as a menu.
This change moves the acknowledge of the mode to WaylandServer. As we
anyway always acknowledge the requested mode we can also do it there and
don't require ShellClient to be present. Thus when the ShellClient is
created the mode is properly reflected and no decoration is created.
BUG: 389117
FIXED-IN: 5.12.0
Test Plan: Played a lot with evince
Reviewers: #kwin, #plasma
Subscribers: plasma-devel, kwin
Tags: #plasma
Differential Revision: https://phabricator.kde.org/D9967
Summary:
This ensures that using KDE Connect to control input properly inhibits
idle timeouts.
Reviewers: #kwin, #plasma
Subscribers: plasma-devel, kwin
Tags: #plasma
Differential Revision: https://phabricator.kde.org/D9555
Plus test
Test Plan:
Ran kwin with menus and patched QPT
Ran test
Reviewers: graesslin
Reviewed By: graesslin
Subscribers: graesslin, kwin, #kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D9262
Summary:
A small helper class is added which manages inhibiting idle for the
ShellClients. So far only very basic functionality is added. That is
only the inhibition on the Surface is followed. It is not yet checked
whether the ShellClient is visible at all. That needs some changes in
ShellClient.
BUG: 385956
FIXED-IN: 5.12
Test Plan: New test case passes
Reviewers: #kwin, #plasma
Subscribers: plasma-devel, kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D8856
Summary:
Allows to share the implementation in a better way and is a requirement
to get the Screen implementation in the QPA plugin to be based on
KWin::Screens instead of KWayland::Output.
Reviewers: #kwin, #plasma
Subscribers: plasma-devel, kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D8344
Summary:
not sure if that is the right "parent" that has
to be set, set the transient for surfaces that
have setParentOf of an imported set
Test Plan:
m_XdgForeign->transientFor(surface()) finds the surface is expected,
not sure how to test it further
Reviewers: #plasma, graesslin
Reviewed By: #plasma, graesslin
Subscribers: luebking, graesslin, davidedmundson, plasma-devel, kwin, #kwin
Tags: #plasma
Differential Revision: https://phabricator.kde.org/D7521
With the new Wayland only mode we start too fast and it can happen that
the initWithWorkspace is called before the client connection is fully
setup. This would result in a crash in the idletime plugin once it tries
to create a seat.
To prevent this problem the code is split out into a dedicated method
and only invoked if all interfaces have been announced on the internal
connection.
Summary:
Adds XDGV6 support for the kwin side.
Popup placement support is limited to the stuff v5 had,
a simple offset, rather than the awesome new positioner.
But Qt doesn't make use of it yet either.
Also ideally we should do all the positioning before sending the first
configure, but again Qt doesn't actually do anything with that anyway.
Also integrate pinging clients
Test Plan: gtk3-demo works nicely.
Reviewers: #plasma, graesslin, mart
Reviewed By: #plasma, graesslin
Subscribers: mart, graesslin, kwin, plasma-devel, #kwin
Tags: #plasma
Differential Revision: https://phabricator.kde.org/D6591
Summary:
Some libraries loaded into KWin (e.g. breeze) also have a Wayland
connection. If KWin destroyes it's own Wayland connection before the
libraries destroy theirs, KWin might crash on tear down when the
libraries call into libwayland with an invalid connection.
This change requires D6569 in KWayland.
Reviewers: #kwin, #plasma
Subscribers: plasma-devel, kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D6571
Summary:
Provides a virtual method in Screens where backends can supply the scale
of each screen, this is then set on each output.
For the X windowed backend this value is taken from a command line
parameter.
Test Plan:
Ran windowed mode with --scale 1 and 2
then kate --platform=wayland from another screen.
On the latter case UI elements were scaled up correctly
Reviewers: #plasma
Subscribers: plasma-devel, kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D3159
Summary:
So far KWin did not support the sequence:
1. Create wl_shell
2. Create PlasmaShellSurface
3. Create wl_shell_surface
KWin only supported the case that the PlasmaShellSurface is the last
thing to get created. This is rather limiting and can be considered a
bug. At least we had a QEXPECT_FAIL auto test for this situation. So
it was a known issue.
This change should make it easier to support the QtWayland changes in
Qt 5.8.
Reviewers: #kwin, #plasma_on_wayland
Subscribers: plasma-devel, kwin
Tags: #plasma_on_wayland, #kwin
Differential Revision: https://phabricator.kde.org/D4482
Summary:
WaylandServer creates a socketpair for several Wayland connections. So
far this duplicated code quite a bit.
This change introduces one method to perform the socketpair and the
error checking plus creating the server side ClientConnection from the
pair.
Test Plan: Tests still pass
Reviewers: #kwin, #plasma_on_wayland
Subscribers: plasma-devel, kwin
Tags: #plasma_on_wayland, #kwin
Differential Revision: https://phabricator.kde.org/D3576
Summary:
There are two types of constraints supported:
1. Pointer confinement
2. Pointer locking
In the case of confinement the pointer is confined to a given region of
the surface. This is comparable to general operation where the pointer
is confined to the screen region.
In the second case the pointer gets locked. That means it cannot move at
all. No further position updates are provided, only relative motion
events can go to the application. There is a hint about cursor position
update on unlock which is not yet implemented in KWayland::Server, thus
also not in this change.
The implementation in KWin grants the requests for pointer constraints
when the pointer enters the constrained region, either by pointer
movement or by e.g. stacking order changes. There is no confirmation
from user required to enter that mode. But we want to show an OSD when
the pointer gets constrained, this is not yet implemented, though.
Breaking an active constraint is relatively easy. E.g. changing the
stacking order will break the constraint if another surface is under the
cursor. Also (in case of confinement) moving the pointer to an
overlapping window breaks the confinement. But as soon as one moves the
pointer back to the window a constraint might get honoured again.
To properly break there is a dedicated event filter. It listens for a
long press of the Escape key. If hold for 3sec the pointer constraint is
broken and not activated again till the pointer got moved out of the
window. Afterward when moving in the pointer might activate again.
The escape filter ensures that the key press is forwarded to the
application if it's a short press or if another key gets pressed during
the three seconds. If the three seconds way fires, the later escape
release is not sent to the application.
This basic interaction is also ensured through an added auto test.
This change implements T4605.
Test Plan: Added auto test and nested KWin Wayland with D3488
Reviewers: #kwin, #plasma_on_wayland
Subscribers: plasma-devel, kwin
Tags: #plasma_on_wayland, #kwin
Differential Revision: https://phabricator.kde.org/D3506
Summary:
This change implements forwarding the pointer gestures to the new API in
SeatInterface.
While screen is locked no gestures are forwarded to the server. Also
locking the screen cancels any active gesture. Similar if areas inside
KWin would start to intercept the gestures, they need to be cancelled on
the Wayland SeatInterface.
Test Plan: Not yet
Reviewers: #kwin, #plasma_on_wayland
Subscribers: plasma-devel, kwin
Tags: #plasma_on_wayland, #kwin
Differential Revision: https://phabricator.kde.org/D3174
Summary:
This allows Client to use the Wayland-specific implementation if there
is no icon geometry set through the X11 way. That way Xwayland windows
have an icon geometry even if Plasma is using Wayland and setting the
icon geometry in the Wayland way. Which is expected as Plasma is
ignorant about the windowing system a PlasmaWindow uses.
In order to move the code from ShellClient to AbstractClient
WaylandServer gained a new findAbstractClient(Surface*) method which
is just like findClient(Surface*) with the difference that it returns
an AbstractClient instead of a ShellClient*.
Test Plan:
minimized/unminimized an X client on Wayland, verified
animation is correct (though broken in general for minimize)
Reviewers: #kwin, #plasma_on_wayland
Subscribers: plasma-devel, kwin
Tags: #plasma_on_wayland, #kwin
Differential Revision: https://phabricator.kde.org/D2530
If we try to query before WaylandServer created the KSldApp the service
owner change is never delivered. Thus a delay till we know that the
service is there on Wayland. On X11 the initialization can be done
directly.
To know when the WaylandServer is fully initialized an additional
signal is added to WaylandServer.
Summary:
Most platforms like the nested and virtual do not handle the outputs
themselves and WaylandServer announces the Outputs to Wayland.
So far this was static: at startup it got announced once to Wayland
and any changes were not catched.
This change makes WaylandServer listen to changes to the Screens and
sync them to Wayland.
Unfortunately KWin's internal Screen information is not sufficient to
properly synchronize this to Wayland and also Wayland by not supporting
adding/removing modes does not help.
Thus the solution implemented here is to add new outputs reflecting the
changes and then removing the old ones. This creates situations with more
outputs being present than actually there, but prevents that there are
no outputs at all.
Test Plan: Auto test added which verifies this for the virtual platform
Reviewers: #kwin, #plasma_on_wayland
Subscribers: plasma-devel, kwin
Tags: #plasma_on_wayland, #kwin
Differential Revision: https://phabricator.kde.org/D2233
Summary:
The WaylandServer creates the XdgShellV5 interface and hooks it up
to create a ShellSurface whenever an xdg surface or xdg popup is created.
ShellClient gains some new ctors for the different variants and is
adjusted to delegate to xdg surface respectively.
With this change KWin mostly supports xdg-shell protocol. Still missing
is support for the "geometry" request which is rather difficult to
implement in KWin.
Reviewers: #kwin, #plasma_on_wayland
Subscribers: plasma-devel, kwin
Tags: #plasma_on_wayland, #kwin
Differential Revision: https://phabricator.kde.org/D2108
Summary:
Have one dedicated method which performs the connection for both
Client and ShellClient. This fixes the desktopPresenceChanged signal
not being passed to the effects.
Note that not all signals are merged. Most signals setup for Client
don't make sense for ShellClient as ShellClient cannot block composite
or unredirect.
Test Plan:
Test case added for ShellClient to ensure that the signal
is correctly invoked on the ShellClient, Workspace and EffectsHandler.
Reviewers: #kwin, #plasma_on_wayland
Subscribers: plasma-devel, kwin
Tags: #plasma_on_wayland, #kwin
Differential Revision: https://phabricator.kde.org/D2059
Summary:
If KWin fails to start the Wayland server due to XDG_RUNTIME_DIR not
being set, kwin_wayland should terminate with an error condition but
not crash.
This change makes sure that KWin detects that the Wayland server does
not work and terminates the startup early and ensures that it doesn't
crash while going down.
An error message is shown that we could not create the Wayland server.
Test Plan:
Test case added which verifies that WaylandServer fails to
init. Manual testing that kwin_wayland exits with error 1.
Reviewers: #kwin, #plasma_on_wayland
Subscribers: plasma-devel, kwin
Tags: #plasma_on_wayland, #kwin
Differential Revision: https://phabricator.kde.org/D2078
Summary:
The clipboard sync is done by a dedicated helper binary launched by
KWin. This helper binary is forced to xcb platform to piggy-back on
Qt's implementation of the X11 clipboard. In addition it implements
the Wayland clipboard - which is much simpler. Reading the Wayland
clipboard is based on the implementation in QtWayland.
KWin internally knows the DataDeviceInterface belonging to the helper
application. Whenever an xwayland client is focussed, this DataDevice
is allowed to set the selection and KWin manually updates the current
selection in the SeatInterface. By that the sync from X11 to Wayland
is implemented. When afterwards a Wayland client is selected, it's sent
the current selection which references the X clipboard and a data
transfer can be initiated in the normal Wayland way.
For the other direction KWin sends the current selection to the helper's
DataDevice whenever an xwayland window is focused. The helper application
reads the Wayland clipboard and sets it on the X11 clipboard. Thus the
Wayland clipboard is synced to X11.
The approach used here will also be useful for implementing a clipboard
manager (aka klipper).
Currently the implementation is not yet fully completed. We need to
make sure that the helper application gets restarted in case of a crash.
Test Plan: See added test case
Reviewers: #plasma_on_wayland, #kwin
Subscribers: plasma-devel, kwin
Tags: #plasma_on_wayland, #kwin
Differential Revision: https://phabricator.kde.org/D1973
Summary:
When a shell client got mapped, unmapped and mapped again we emitted
the shellClientAdded signal in WaylandServer again. This resulted in
e.g. Workspace, EffectsHandler, etc. to start managing the window again.
This can be a reason for problems we see with such windows like the
Plasma panel dialog when opened the second time.
Test Plan:
Needs extensive testing on real world system as that changes
behavior now.
Reviewers: #kwin, #plasma_on_wayland
Differential Revision: https://phabricator.kde.org/D1784
Summary: It's instantiated, but never created. This means that libkscreen's wayland backend is going to hang initializing.
Test Plan: Ran libkscreen against it, works with and doesn't work without patch.
Reviewers: graesslin, #plasma
Reviewed By: graesslin, #plasma
Subscribers: plasma-devel
Projects: #plasma
Differential Revision: https://phabricator.kde.org/D1524
Summary:
Instead of having the Application invoke initOutputs after creating
the Screens, we can just connect to the signal emitted there.
This allows to make initOutputs a private, WaylandServer internal
method.
Reviewers: #plasma
Subscribers: plasma-devel
Projects: #plasma
Differential Revision: https://phabricator.kde.org/D1482
Summary:
In order to start the WaylandServer in kwin_x11 we need to make sure
that WaylandServer does not start the KScreenLocker integration. On
X11 the lock screen is provided by a different application (in Plasma
by ksmserver).
A new init flag is added to WaylandServer to not integrate with
KScreenLocker. Thus the default is still to integrate with KScreenLocker.
All direct usages of KScreenLocker are guarded to not be called if
the screenlocker integration is not present.
Reviewers: #plasma
Subscribers: plasma-devel
Projects: #plasma
Differential Revision: https://phabricator.kde.org/D1481
Without the /dev/dri/card0 mesa fails to initialize egl and the test
fails. In order to silence the failure till the system provides the
device file, we better skip the test.
A nullptr crash in that case is fixed in WaylandServer tear-down.
Summary:
This is the first change in a refactoring series. The aim is to:
* rename AbstractBackend to Platform
* move backends/ to plugins/platforms/
* don't bind platforms to Wayland only
* provide a platform plugin for "normal" X11
* share more code between X11 and Wayland
This change moves the platform/backend from waylandServer to Application.
The init of the plugin happens directly in the Application from the
KPluginMetaData. There is no need to externally init it and set the
parent.
WaylandServer::backend() currently just delegates to
kwinApp()->platform(), the idea is to drop this method completely.
The test infrastructure is also adjusted to this change.
Test Plan: kwin_wayland still works, all tests pass
Reviewers: #plasma, sebas
Subscribers: plasma-devel
Projects: #plasma
Differential Revision: https://phabricator.kde.org/D1331
This patch implements read access to the outputmanagement interface in
kwin_wayland's drm backend.
- outputdevices are created in DrmOutput, just like the wl_outputs
- wayland_server implements the outputmanagement interface and
- passes the changesets down into the backend
This means that the interface is announced, independently of the DRM
backend, but the actual outputs are currently only there if the DRM
backend is used.
The changes are not applied (passed into the kernel's drm interface
yet). This is obviously work-in-progress, so it's incomplete. Since it
allows us to run kwin[master] with the libkscreen KWayland backend, it's
a significant step allowing testing and further development.
Reviewed-by: Martin Gräßlin
We need to also destroy all idle objects when we tear down the
internal client connection. Otherwise the cleanup tries to free
the object after our Wayland connection is already destroyed.
KSld goes to state AcquiringLock when starting the greeter process.
During this state it expects the input to be grabbed. So from KWin
perspective this means that the screen is locked and KWin should
filter out input events.
We announce support for it and depending on whether we have a plugin
or not set the default mode to Server or None.
When a decoration interface is created it gets installed on the
ShellClient. But there it isn't properly used yet as we don't have
support for decorations in ShellClient yet.
Need to pass a proper env to ScreenLocker to ensure we don't mess
with the greeter's environment by e.g. unsetting QT_IM_MODULE or
setting EGL_PLATFORM.
Reviewed-By: Bhushan Shah
Ensures that all Wayland objects are destroyed and the cleanup handling
is performed before tearing down the Compositor. This fixes for example
a crash if a Surface with a Shadow is still around at tear down.
This introduces Toplevel::isLockScreen() and Toplevel::isInputMethod(),
this can be used to allow only lockscreen/inputmethods to get input
events and shown when screen is locked.
We need to destroy the ClientConnections we create. Also we need
to disconnect our Xwayland error handling before destroying it, otherwise
it would trigger the abort for crashing Xwayland.
ASAN righly complained: we need to delete our Wayland objects before
we destroy the internal client connection. Solved by better setting
parent relationships in the QPA plugin and correctly delete objects
in destroy of internal client connection.
We need to destroy the compositor after Xwayland terminated and after
the internal Wayland connection is destroyed. This means when destroying
the Workspace we may no longer destroy the Compositor at the same time.
Also we need to ensure that other tear down functionality doesn't call
into the no longer existing internal client connection.
With this change kwin doesn't crash when exiting with Wayland and/or
X11 windows still open.
This allows to check if specific ShellClient is from LockScreen or not,
as well as this adds method to verify if ShellClient is from input
method like maliit.
Now that KWin knows about which window is from Screenlocker it can apply
various security restrictions like no other window then greeter is on
top of it.
Reviewed-By: Martin Gräßlin
This introduces --lockscreen option in kwin_wayland which when used will
lock screen immediately. Also dependency to newly created kscreenlocker
repo is introduced.
REVIEW: 125954
Our server announces the DpmsManagerInterface and in the DRM backend
we announce support for Dpms on the OutputInterface (if the Output
supports it) and we connect to changing Dpms requests.
Allows to interact with the Registry for the internal connection in
other parts of KWin and makes it possible to create more than just the
ShmPool for this Registry.
For Wayland clients we now are able to get shadows.
Internally this reuses large parts of the X11 implementation. This
could be improved to make the Scene's better aware of the Wayland
shadow, so that less memory is needed.
The creation of PlasmaWindowInterface is moved from WaylandServer into
AbstractClient. This allows the sub classes to better control when to
create/destroy the Client.
For creation it's bound to becoming visible - that is Windows which are
only created but never shown are not announced at all.
For Client it's destroyed with the normal tear-down of a Client, for
ShellClient it's destroyed on unmapped (which also means a new one
will be created again in case of another mapping of the surface).
As a side effect, this works around the problem that ShellClients do not
yet get destroyed for QtWayland's menus (needs further investigation).
Ensures that the PlasmaWindow gets destroyed together with the window.
Note: when a ShellClient gets unmapped the PlasmaWindow does not yet
get destroyed. It should probably get destroyed and recreated on next
mapping.
If the icon doesn't have a name, we pass the generic xorg icon. Most
likely our xwayland clients won't have a theme name, so giving them
the xorg icon seems a good enough work around. If we would want to
pass the real icon for xwayland clients we would need a way to
serialize them which seems like quite some needless overhead for legacy
applications. Can be considered for the future nevertheless.
With Xwayland clients it can happen that the window gets destroyed
before it ever got a surface (Qt 5's file open dialog being an example).
This change delays such clients till it got the surface, removing not
needed roundtrips and possible problems.
So far this only allows to trigger show desktop functionality and exports
the state.
In future this should be restricted to just one dedicated desktop shell
process.
Input-method servers, like maliit, need to be known to KWin since KWin
needs to know about virtual keyboards. Virtual keyboards should be shown
as OSD layers, and they are one of the types of windows that actually
should be showable when the lock screen is active.
kwin_wayland --inputmethod /path/to/your/input-server
tries to start the input server. The input-server's window never gets
keyboard focus and is shown on top of all windows except for KWin's
internal clients.
The PlasmaShell interface allows to create a PlasmaShellSurface for a
given Surface. Through this interface the Surface can request:
* a specific position
* a window type
So far only the window types Normal, Panel and Desktop are supported
which is a sufficient subset for getting plasmashell to work.
In future there should be security checks so that only the dedicated
desktop shell can bind these interfaces.
Fixes regression introduced with 90a6814: we may not queue a signal
taking a pointer to a ShellClient as the ShellClient might be destroyed
before the queued signal is delivered.
The idea for the queued signal was to ensure that the size is set when
windowShown is emitted - this can also be achieved by first updating the
size.
When a ShellClient is added and it's not internal, it get placed just
like any other Client. This needs to happen after the initial size is
determined.
Please note: this breaks the positioning of popup windows (e.g. menus)
as they are placed like any other Client. This needs proper popup support
which right now does not yet exist and thus is not much difference to
before.
Adds all internal ShellClients into a dedicated list. This ensures that
we don't perform "normal" window management on them.
In addition we add them to the top of the stacking order. This restores
behavior as it is on X11: internal windows are using BypassWindowManagerHint
and thus on top of everything.
The internal used window Id consists of two parts identifiying the
Client and one identifying the Surface. That is the first 16 bits
are set to the ClientConnection, the last 16 bits are taken from
the Surface id. As the Surface id is 32 bits, but we only use 16 bits
there is a chance of overlap. So this might need some improvement.
If the ShellClient got created for a Qt internal window, we try to
find the QWindow and if we get one, we use the geometry directly as
it got set by KWin in the first place.
Also a windowId() is added to ShellClient which can be used by the
effect system to find an EffectWindow. If it's an internal QWindow
we just use that window id. For other clients we still need some
smart solution.
QtWayland and mesa might dead lock KWin if we start rendering a QWindow
before Qt/Mesa got the last frame callback. They perform blocking wayland
event reading on the main gui thread which makes it impossible for KWin
to do the compositing and send the callback.
To workaround this problem we fake a frameRendered directly after each
damage event for a Qt internal window. Unfortunately this is not yet
completely sufficient, thus we also need to ensure that the wayland
events are processed before any events are processed which would cause
a repaint and block. Thus we first flush QtWayland's wl_display and then
our Server connection. If there were any damage events we can be sure
that the frameRendered is sent before Qt attempts to render.
QtWayland only creates popup windows if they have a parent QWindow or
if there is any window which had input. It's not enough to fake an
enter, it needs to be either a pointer button press or key press.
As KWin's useraction menu doesn't have a parent and we most likely
never send a pointer press to any QWindow it doesn't get shown. To
circumvent this we create a dummy window and fake a button press/release
on the window. After that Qt is tricked into believing there's a parent
window and shows the popup.
Faking the input is only done with at least Qt 5.5 as QtWayland crashes
on pointer event without a keymap being installed. As KWin does not yet
send keymaps we better disable the dangerous code path. With Qt 5.5 the
crash condition is fixed.
The ShellClient is a Toplevel subclass for a
KWayland::Server::ShellSurfaceInterface. It gets created when a new
ShellSurfaceInterface is created and destoryed when it gets unmapped.
So far the usage is still rather limited. The ShellClient is opened
at position (0/0). While it's possible to pass pointer events to it,
it's not yet possible to activate it, so no keyboard focus.
If Xwayland goes down it's better to abort than staying alive. If
Xwayland goes down the next roundtrip to X (most likely during call
to xStackingOrder) will just freeze completely, which is kind of the
worst as one cannot VT-switch anymore. So a clean abort is a bad but
better solution.
Getting the cursor image from the cursor theme is unfortunately not
straight forward. We have three different libraries and all have
drawbacks:
* XCursor - we just kicked it out
* xcb-util/cursor - only provides xcb_cursor_t, so a dependency on X
* wayland-cursor - only a client side API
The picked solution is using wayland-cursor. It provides the cursor in a
wl_buffer. Unfortunately the client side API does not easily allow to
a) read it back
b) init without a wl_shm_pool
Thus we need to work this around:
* create an internal connection
* get a ShmPool on it
* init WaylandCursorTheme with this ShmPool
* get the cursor wl_buffer from the theme
* trigger a roundtrip
* get the corresponding BufferInterface for the buffer
* set the content as the software cursor
The AbstractBackend registers itself in the WaylandServer allowing
external users to easily get to the backend and not needing to test
manually which backend is used.
WaylandServer allows to create a ClientConnection which is intended for
QtWayland. This allows us to easily identify our "own" surfaces. The
created file descriptor is set as env variable WAYLAND_SOCKET prior to
creating the Application. Wayland will unset it after connecting, so we
don't need to unset it. This removes the hack of setting and resetting
the WAYLAND_DISPLAY environment variable.
Creates a socketpair in WaylandServer and creates a ClientConnection for
Xwayland. The created file descriptor is passed to Xwayland through the
WAYLAND_SOCKET env variable.
Adds the SurfaceInterface identified by the surface id we get from
Xwayland. This allows in an easier way to map a Toplevel to a
Wayland surface and will also be useful for Wayland clients.
The WaylandServer is at the moment only used to support starting an
Xwayland. It does not support Wayland clients yet, so don't get
excited.
For Xwayland it's using the trick of creating the Display before the
QApplication is created with manual event dispatching.
