Active output is a window management concept. It indicates what output
new windows have to be placed on if they have no output hint. So
Workspace seems to be a better place for it than the Screens class, which
is obsolete.
This is a little helper that can be very convenient with our transition
from int-based screen ids to AbstractOutput.
As is, the main issue with int screen ids is that they are extremely
dynamic.
With AbstractOutput being used more heavily, it makes sense to have
something like Screens::number() in the Platform class. As is, the steps
to get an output for a given point are awkward - first, get the screen
id, then use the screen id to get the output.
With the new virtual desktop model, we have an issue where the old
code that uses desktop() needs to be ported to desktops().
However, using no desktop() is better as we don't need to deal with
cases where a window can be on several desktops, which can be annoying
sometimes.
This change removes the desktop arg in electricBorderMaximizeGeometry()
and ports it to a Workspace::clientArea() overload that requires no
desktop.
Under the hood, Workspace::clientArea() still uses desktop(), but it
could also use a different strategy to compute the client area if the
window is on several virtual desktops, e.g. intersect client area on
every virtual desktop.
The new overloads take the client (as context) and the desired screen id
or a point and return the client area.
The main motivation behind this change is to make the transition to the
new virtual desktop model where a window can be on several desktops less
painful.
This patch has one behavioral change - raiseOrLowerClient() will not
work if the client is not on the current virtual desktop.
However, raiseOrLowerClient() can be called only in two cases:
* user triggers the raise or lower shortcut for the active client. Since
the active client is on the current virtual desktop, it's not an issue
* an x11 window restacks itself. It makes no sense if an x11 window
restacks itself while it's inactive or not on current virtual desktop.
Also, the Opposite restack mode is rarely used, some window managers
don't even bother implementing it. So, having such a constraint should
not be a problem.
The main reason for not allowing raiseOrLowerClient() for windows that
are not on the current virtual desktop is that a window can be on
multiple virtual desktops. If a window is on A and B virtual desktops,
the only logical option is to toggle stacking position if the window is
on the current desktop. It's the only viable option as kwin does not
maintain per virtual desktop stacking order.
This ports relevant apis in WindowRules to the VirtualDesktop class.
If the client has no desktop rule, the desktop list that has been passed
to the checkDesktops() function will be returned.
If the client has a desktop window rule, the checkDesktop() function
will return a list with a single VirtualDesktop object or none if the
window is forced to be on all virtual desktops.
The main motivation behind this change is to reduce the number of usages
of int-based virtual desktop apis. int-based desktop ids are highly
unreliable. For example, if a new virtual desktop is inserted in the
middle or removed in the middle, the desktop ids will change. This makes
working with virtual desktops code more challenging due to its behavior.
This is not an issue with VirtualDesktop objects.
These repaints were added to fix visual artifacts that appear when
shadow is removed, but since items schedule repaints when needed, we can
remove these two.
toplevel.h is included in many places. Changing virtualdesktops.h may
trigger rebuild of all kwin.
With this change, only cpp files that use virtualdesktops.h will need to
be recompiled.
AbstractClient::doPerformInteractiveMoveResize() is only used by the
X11Client to reset a boolean flag when the client doesn't support sync
counters.
X11Client can call performInteractiveMoveResize() only in two cases: the
sync request timer expires or the client increments the sync counter.
This change removes the AbstractClient::doPerformInteractiveMoveResize()
function and adds a function to handle the case where the sync timer
expires explicitly. This removes a virtual function in the AbstractClient
and makes code more readable.
Window management features were written with synchronous geometry
updates in mind. Currently, this poses a big problem on Wayland because
geometry updates are done in asynchronous fashion there.
At the moment, geometry is updated in a so called pseudo-asynchronous
fashion, meaning that the frame geometry will be reset to the old value
once geometry updates are unblocked. The main drawback of this approach
is that it is too error prone, the data flow is hard to comprehend, etc.
It is worth noting that there is already a machinery to perform async
geometry which is used during interactive move/resize operations.
This change extends the move/resize geometry usage beyond interactive
move/resize to make asynchronous geometry updates less error prone and
easier to comprehend.
With the proposed solution, all geometry updates must be done on the
move/resize geometry first. After that, the new geometry is passed on to
the Client-specific implementation of moveResizeInternal().
To be more specific, the frameGeometry() returns the current frame
geometry, it is primarily useful only to the scene. If you want to move
or resize a window, you need to use moveResizeGeometry() because it
corresponds to the last requested frame geometry.
It is worth noting that the moveResizeGeometry() returns the desired
bounding geometry. The client may commit the xdg_toplevel surface with a
slightly smaller window geometry, for example to enforce a specific
aspect ratio. The client is not allowed to resize beyond the size as
indicated in moveResizeGeometry().
The data flow is very simple: moveResize() updates the move/resize
geometry and calls the client-specific implementation of the
moveResizeInternal() method. Based on whether a configure event is
needed, moveResizeInternal() will update the frameGeometry() either
immediately or after the client commits a new buffer.
Unfortunately, both the compositor and xdg-shell clients try to update
the window geometry. It means that it's possible to have conflicts
between the two. With this change, the compositor's move resize geometry
will be synced only if there are no pending configure events, meaning
that the user doesn't try to resize the window.
They are used only by X11Client, so make X11Client call relevants
methods on the surface item directly instead. In hindsight, it will be a
really good idea to make SurfaceItemX11 and SurfaceItemXwayland(?)
automatically manage the window pixmap. However, it can be done once
an item freezing api is added and we fix the cross-fade animation.
This is to improve code readability and make it easier to differentiate
between methods that are used during interactive move-resize and normal
move-resize methods in the future.
With the client-side decoration changes, kwin will properly determine
whether the window needs to be configured even if the frame geometry has
not changed.
This change slightly changes the semantics of the setFrameGeometry()
method. Prior to this, it was possible to force a geometry, i.e. block
other geometry updates, however such a behavior is counter-intuitive and
it exponentially increases the complexity of code.
As far as I know, the force flag was needed to propagate geometry
changes if the frame geometry doesn't change, but the client geometry
does. With the client-side decoration changes, the force flag is not
needed, as kwin now takes into account the client geometry and the frame
geometry when determining whether to send a configure event.
Currently, the Workspace has no any api to constrain one window above
another. This results in having hacks such as keepDeletedTransientAbove()
This change introduces a basic api to constrain a given window above
another. It can be used for ensuring that transient windows are placed
above their parents. It also can be used for stacking the outline window
below the move-resize window.
Internal windows may also have transient parents. Because of that, this
change makes the workspace add internal clients to the stacking order by
default. The good thing about it is that it allows us unify some input
related code for "external" windows and internal windows.
Currently, the fullscreen state is update synchronously, but it needs to
be done in asynchronous fashion.
This change removes some tests as they don't add any value, testFullscreen()
covers them all.
screen() only gets updated after AbstractClient::sendToScreen if invoked
by a shortcut or menu (as opposed to moveresize), so we can't use it in
AbstractClient::updateGeometryRestoresForFullscreen as it points to the
old screen.
This introduces the markedAsZombie signal, which is emitted when the
window is about to become deleted. The X11SurfaceItem uses this signal
to determine when the damage must be destroyed.
Currently, dealing with sub-surfaces is very difficult due to the scene
design being heavily influenced by X11 requirements.
The goal of this change is to re-work scene abstractions to make improving
the wayland support easier.
The Item class is based on the QQuickItem class. My hope is that one day
we will be able to transition to QtQuick for painting scene, but in
meanwhile it makes more sense to have a minimalistic internal item class.
The WindowItem class represents a window. The SurfaceItem class represents
the contents of either an X11, or a Wayland, or an internal surface. The
DecorationItem and the ShadowItem class represent the server-side deco and
drop-shadow, respectively.
At the moment, the SurfaceItem is bound to the scene window, but the long
term plan is to break that connection so we could re-use the SurfaceItem
for things such as software cursors and drag-and-drop additional icons.
One of the responsibilities of the Item is to schedule repaints as needed.
Ideally, there shouldn't be any addRepaint() calls in the core code. The
Item class schedules repaints on geometry updates. In the future, it also
has to request an update if its opacity or visibility changes.
Our wayland interface lifespan only needs to live as long as the window
is mapped.
Given this corresponds directly to the lifespan of AbstractClient we can
just set a parent and everything is handled implicitly.
We're now sharing most of the X11Client activity behavior accross all
clients. This allows to cleanup some of the existing virtuals and remove
quite a bit of code overalls.
Has to introduce an extra platform specific hook since X11Client
serializes the activity information in an atom and we will probably need
to do something similar on the Wayland platform at some point.
This allows us to start interacting with the activities with kwin
wayland. They are not restored properly accross sessions though since
nothing is really persisted and the session management still seems to
be amiss.
