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Summary:
As is KWin only had 1 Cursor which was a singleton. This made it impossible for
us to properly implement the tablet (as in drawing tablets) support and show where
we're drawing.
This patch makes it possible to have different Cursors in KWin, it makes all the
current code still follow the mouse but the tablet can still render a cursor.

Test Plan: Tests pass, been using it and works as well as before but with beautiful tablet cursors.

Reviewers: #kwin, cblack, davidedmundson

Reviewed By: #kwin, cblack, davidedmundson

Subscribers: davidedmundson, cblack, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D28155

Summary: Recent changes prevented it to build on KDE Neon.

Test Plan: Built it on Neon

Reviewers: #kwin, bshah, davidedmundson

Reviewed By: #kwin, bshah, davidedmundson

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D28511

Summary:
We build some objects several times which makes it uncomfortable to develop KWin
since every time we modify something a lot of things get rebuilt. This should
help a bit although it doesn't solve all the problems.

Test Plan: Builds, tests pass

Reviewers: #kwin, zzag

Reviewed By: #kwin, zzag

Subscribers: davidedmundson, zzag, anthonyfieroni, iasensio, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D28445

Summary:
Uses the tablet classes introduced in kwayland.
Depends on D26858

Test Plan:
Scratched my tablet with a magic stick and it did things depending on the pressure.
https://youtu.be/GGx0TlNJlzs

Reviewers: #kwin, #plasma, zzag, davidedmundson

Reviewed By: #kwin, #plasma, zzag, davidedmundson

Subscribers: davidedmundson, zzag, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D26859

Summary:
xdg-shell stable has been around for quite a while. A quick analysis
showed that many distros ship GTK and Qt that support both xdg-shell
v6 and stable. Therefore, we can drop support for legacy v6 protocol.

Reviewers: #kwin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: apol, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D28118

Summary: inital -> initial

Test Plan: none

Reviewers: #kwin, zzag

Reviewed By: #kwin, zzag

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D28092

Summary: The code contains duplicate includes.

Test Plan: Open the files from the patch

Reviewers: #kwin, apol

Reviewed By: apol

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D28048

Summary: See https://invent.kde.org/websites/hig-kde-org/-/merge_requests/70

Reviewers: #kwin, ngraham

Reviewed By: ngraham

Subscribers: ngraham, zzag, apol, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D27827

Summary:
Currently, we have only one shell client type - XdgShellClient. We use
it when we are dealing with Wayland clients. But it isn't really a good
idea because we may need to support shell surfaces other than xdg-shell
ones, for example input panel surfaces.

In order to make kwin more extensible, this change replaces all usages
of the XdgShellClient class with the AbstractClient class.

Test Plan: Existing tests pass.

Reviewers: #kwin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: davidedmundson, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D27778

Summary:
Since Qt::KeypadModifier is set only for keypad keys and not the NumLock
key, we need to press at least one keypad key to determine whether
numlock is actually on. On the other hand, we know that when numlock is
on, the corresponding LED is also on. So we could check the LED rather
than press two keys.

Test Plan: testKeyboardLayout passes.

Reviewers: #kwin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D27789

Summary:
This functionality will instead be implemented in KScreen such that manual and
automatic output rotation can be used and configured through a single UI in
unison together.

Test Plan: Compiles.

Reviewers: #kwin, davidedmundson, zzag

Reviewed By: #kwin, zzag

Subscribers: kwin, bshah, davidedmundson, zzag

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D26036

Summary:
    FAIL!  : KWin::PointerInputTest::testCursorImage() Compared QImages differ in device pixel ratio.
       Actual   (((p->cursorImage()))): 2
       Expected (blueScaled): 1
       Loc: [/home/vlad/Workspace/KDE/src/kde/workspace/kwin/autotests/integration/pointer_input.cpp(1058)]

Test Plan: The test passes.

Reviewers: #kwin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: davidedmundson, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D27725

Summary:
Currently, there are a couple of issues with sizeForClientSize(). First
of all, we have a method called clientSizeToFrameSize() which does similar
thing except applying geometry constraints and checking window rules. The
other issue is that sizeForClientSize() is doing a bit too much, it checks
window rules, it applies a bunch of geometry constrains. Sometimes it
does not perform conversion between client sizes and frame sizes!

This change attempts to address those issues by replacing sizeForClientSize
with two similar methods and changing semantics of some methods of the
X11Client class.

The most significant difference between sizeForClientSize() and the new
methods is that neither constrainClientSize() nor constrainFrameSize()
check window rules. This is up to users of those methods. In many places,
we don't have to check window rules because we check isResizable(),
which returns false if the frame size is enforced by a window rule.

Reviewers: #kwin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: davidedmundson, romangg, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D26828

Reviewers: #kwin

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D27400

Bad merge

This reverts commit b7130442.

Summary:
Otherwise the content overflows the frame when scrolling.

QQC2 scrollview docs say "ScrollView does not automatically clip its contents. If it is not used as a full-screen item, you should consider setting the clip property to true"

Test Plan:
Before:
{F8121150}

After:
{F8121152}

Reviewers: #kwin, #plasma, ngraham

Reviewed By: ngraham

Subscribers: ngraham, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D27558

Bad merge

This reverts commit 5babf52d.

Summary:
Otherwise the content overflows the frame when scrolling.

QQC2 scrollview docs say "ScrollView does not automatically clip its contents. If it is not used as a full-screen item, you should consider setting the clip property to true"

Test Plan:
Before:
{F8121150}

After:
{F8121152}

Reviewers: #kwin, #plasma, ngraham

Reviewed By: ngraham

Subscribers: ngraham, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D27558

Summary:
We need to provide the input geometry and the input transformation
matrix for Xwayland clients in order to make sure that input events
are correctly mapped from the global screen coordinates to the
screen-local coordinates.

BUG: 417444
FIXED-IN: 5.18.1

Reviewers: #kwin

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D27375

Summary:
Currently we have two signals that are emitted when the Toplevel's geometry
changes - geometryShapeChanged() and geometryChanged(). The former signal
is used primarily to invalidate cached window quads and the latter is
sort of emitted when the frame geometry changes. But it's not that easy. We
have a bunch of connects that link those signals together...

The worst part about all of this is that the window quads cache gets
invalidated every time a geometry update occurs, for example when user
moves a window around on the screen.

This change introduces a new signal and deprecates the existing geometryChanged
signal. frameGeometryChanged is similar to geometryChanged except that it is
emitted when an _actual_ geometry change has occurred.

We do still emit geometryShapeChanged signal. However, in long term, we
need to get rid of this signal or come up with something that makes sense
and doesn't require us to waste computational resources.

Reviewers: #kwin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: davidedmundson, romangg, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D26863

Reviewers: #kwin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: davidedmundson, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D27168

Summary:
QDateTime::fromMSecSinceEpoch uses Qt::LocalTime by default. This involves an
expensive localtime conversion. So instead force things to use UTC, as there
is no need for timezone information when tracking durations.

This is especially noticeable on Bedrock Linux, which uses a Fuse mounted
/etc, which is slower than a plain /etc and causes quite some slowdown there.
See https://github.com/bedrocklinux/bedrocklinux-userland/issues/140 for
details.

Test Plan: The screenedge unit test still passes.

Reviewers: #kwin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: zzag, anthonyfieroni, davidedmundson, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D27114

Summary:
Since we send the initial configure event after placing xdg-popups, we
can finally implement resize_x and resize_y constraint adjustments.

Reviewers: #kwin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: davidedmundson, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D27049

Summary: It's not "KWIN" nor "kWin" nor "kWIN" nor "kwin"

Test Plan: Qt Creator displays "KWin" with correct capitalization.

Reviewers: #kwin, meven

Reviewed By: meven

Subscribers: apol, meven, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D26500

Summary:
According to the xdg-shell spec, configure events carry the maximum
window geometry size. If a client wants to enforce aspect ratio, it
may attach a buffer with smaller size. We need to account for that
when determining frame geometry in the commit handler.

I'm targeting 5.18 branch.

Reviewers: #kwin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D26886

Summary:
This includes support for them on libinput and turns it into fake
pointer actions.
This doesn't implement zwp_tablet, this will have to happen in an
iteration later.

Test Plan:
Been playing around with it, see video.
https://www.youtube.com/watch?v=GF1WbO8FVvU

Reviewers: #plasma, #kwin, romangg

Reviewed By: #plasma, #kwin, romangg

Subscribers: zzag, davidedmundson, romangg, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D25663

Reviewers: apol, zzag

Reviewed By: apol, zzag

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D25667

Summary:
Qt has its own thing where a type might also have corresponding list
alias, e.g. QObject and QObjectList, QWidget and QWidgetList. I don't
know why Qt does that, maybe for some historical reasons, but what
matters is that we copy this pattern here in KWin. While this pattern
might be useful with some long list types, for example

    QList<QWeakPointer<TabBoxClient>> TabBoxClientList

in general, it causes more harm than good. For example, we've got two
new client types, do we need corresponding list typedefs for them? If
no, why do we have ClientList and so on?

Another problem with these typedefs is that you need to include utils.h
header in order to use them. A better way to handle such things is to
just forward declare a client class (if that's possible) and use it
directly with QList or QVector. This way translation units don't get
"bloated" with utils.h stuff for no apparent reason.

So, in order to make code more consistent and easier to follow, this
change drops some of our custom typedefs. Namely ConstClientList,
ClientList, DeletedList, UnmanagedList, ToplevelList, and GroupList.

Test Plan: Compiles.

Reviewers: #kwin

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D24950

Reviewers: #kwin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: kwin

Tags: #kwin

Maniphest Tasks: T10867

Differential Revision: https://phabricator.kde.org/D24459

Summary:
So far the window geometry from xdg-shell wasn't implemented as it should
be. A toplevel must have two geometries assigned to it - frame and buffer.
The frame geometry describes bounds of the client excluding server-side
and client-side drop-shadows. The buffer geometry specifies rectangle on
the screen occupied by the main surface.

State and geometry handling in XdgShellClient is still a bit broken. This
change doesn't intend to fix that, it must be done in another patch asap.

Test Plan: New tests pass.

Reviewers: #kwin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: davidedmundson, romangg, kwin

Tags: #kwin

Maniphest Tasks: T10867

Differential Revision: https://phabricator.kde.org/D24455

Summary: TabBoxClient::window() method is no longer used by the tabbox.

Test Plan: Compiles, tests still pass.

Reviewers: #kwin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D25092

Summary:
When a plasma session quits, the order of plasmashell and clients quitting is undetermined.

This looks bad as our desktop background disappears quite early. Rather than changing the real order, we can have kwin reference the last pixmap of any desktop and hold on to it.

Lasting till the compositor quits means it stays on the X frontbuffer till X quits and the experience is seamless.

Test Plan: Logged out (with relevant other ksmserver patches)

Reviewers: #kwin, zzag

Reviewed By: #kwin, zzag

Subscribers: zzag, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D24864

Summary:
Won't make things go much faster since everything that was
being passed by value is refcounted but still const & is a bit faster
than refcounting

For shared pointers instead of adding const & we move them into the
destination variable saving some cpu usage but at the same time making
clear the pointer is being stored by not being const &

Reviewers: zzag

Reviewed By: zzag

Subscribers: zzag, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D25022

Summary:
This change adds detection support for virgl (Mesa gallium virtio guest driver).
Results in proper detection in supportInformation and debug console.

Test Plan: Modified test passes, run KWin_Wayland in kvm with virgl and verified supportInformation

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D25056

Summary:
If no conversion functions are provided for a QObject-subclass, then
QScriptEngine will use QScriptEngine::newQObject() method without any
special options to convert an instance of that QObject-subclass to a
QScriptValue. However, it's very important that every client object is
wrapped with PreferExistingWrapperObject option. We need that option
because a script may set a property on a client object and that property
must remain until it's deleted by the script.

BUG: 413044
FIXED-IN: 5.17.2

Test Plan: New test.

Reviewers: #kwin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: davidedmundson, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D24944