I don't understand why, but this fixes the TestXcbWrapper::testTransientFor().
Failing code fragment in question:
Window transientWindow(createWindow());
transientWindow.changeProperty(XCB_ATOM_WM_TRANSIENT_FOR, XCB_ATOM_WINDOW, 32, 1, &m_testWindow);
// let's get another transient object
TransientFor realTransient(transientWindow);
QVERIFY(realTransient.getTransientFor(&compareWindow));
QCOMPARE(compareWindow, (xcb_window_t)m_testWindow);
the QCOMPARE failed with one compareWindow being 0. It looks like the
cast from Xcb::Window to xcb_window_t in the changeProperty failed.
REVIEW: 124864
Each of the backends becomes a plugin. This allows kwin_wayland to load
the requested plugin and kwin itself doesn't need to link all the
libraries needed. E.g. libdrm is no longer linked if running kwin_x11.
Also this allows to create backends for the non-standard EGL platforms
(examples could be raspberrypi or Android devices).
A wrapper class for MotifHints is added to xcbutils. This class manages
the information about the read Motif hints, so that Client doesn't need
to have a copy of the read states.
The class is designed in a way that during Client::manage we get rid of
another roundtrip.
REVIEW: 122378
It's a convenient class to encapsulate the ICCCM WM_SIZE_HINT.
Instead of exposing just the properties it provides accessors for
the interesting parts and applies sanity checks.
A new implementation of the Screens interface is added which uses XRandR
directly instead of relying on QDesktopWidget. The implementation is
provided in a new implementation file screens_xrandr.cpp.
XRandRScreens comes with a unit test. Unfortunately it's rather difficult
to provide a proper unit test against XRandR. Xvfb (which is obviously
used on the CI system) doesn't provide the XRandR extension. Also on a
"normal" developer system one would not want to just execute the test as
the results are not predictable (number of available outputs?) and the
test would mess up the setup resulting in nobody wanting to execute the
test.
As a solution to both problems the unit test starts Xephyr as a nested
X server. This allows to have at least some limited tests against XRandR.
Nevertheless there are a few things which I was not able to test:
* multiple outputs
* no output at all
The nested X Server approach makes the interaction rather complex. Qt
opens it's connection against the main X Server thus QX11Info provides
a wrong connection and also KWin::connection() which is heavily used by
xcbutils and thus all the RandR wrappers have the wrong connection. To
circumvent this problem the test is GUILESS. In case it would call into
any code using QX11Info, it would probably either runtime fail or crash.
REVIEW: 117614
Only needed for ScopedCPointer which can be defined in both utils and
xcbutils.h.
Not having utils.h in xcbutils.h makes it easier to have unit tests use
xcbutils.h as it removes the dependencies.
This restores the behavior on KWin4: if I set an X property that doesn't have any data on a window, it's still information, so this makes the Xcb wrapper return an empty QByteArray that is not null.
EffectWindow::readProperty() now returns an empty QByteArray constructed the same way as it was in KWin4.
REVIEW:118645
BUG:335446
xcbutils.h has quite a few inline only implementations such as Xcb::Atom,
the Wrappers, Xcb::Window and the convenient methods. Thus there is
nothing wrong with using it from the built-in Effects.
Xcb::Atom is used in Glide and Logout Effect to get the atom. To keep the
logic of the existing code it got extended by a bool isValid() which
gets the reply and returns true if the atom is set.
REVIEW: 117587
The Xcb::Property can wrap the xcb_get_property call and provides
convenient access methods to read the value of the reply with checks
applied. For this it provides a templated ::value method for reading a
single value or reading an array. There's also a ::toBool and
::toByteArray which performs the conversion directly with default values
for the type and format checks.
Xcb::TransientFor is changed to be derived from Property instead of
Wrapper directly, so that the reading of the property value can be
shared.
Xcb::StringProperty is a convenient wrapper derived from Property to
handle the reading of a string property providing a cast to QByteArray
operator. This replaces the ::getStringProperty from utils. Though the
separator functionality from ::getStringProperty is not provided as that
is only used in one function and handled there.
All the custom usages of xcb_get_property or getStringProperty are
replaced to use this new wrapper. That simplifies the code and ensures
that all properties are read in the same way.
REVIEW: 117574
So far the Wrapper class was not able to properly wrap all xcb calls and
there was the restriction that the request function needs to have an
xcb_window_t argument. The result was that wrapper functions were used
for calls with no arguments or for multiple arguments, but in a rather
limited way.
By using variadic template arguments this restriction is removed and the
Wrapper is able to wrap any xcb request/reply group. The main difference
is how the function pointers are defined. Those cannot be specified as
template arguments as the variadic arguments need to be the last in the
list.
The pointers are now defined by a WrapperData struct. For complete usage
please see the extensive documentation added to WrapperData on how it is
supposed to be used.
REVIEW: 117559
Qt doesn't print proper error messages for any errors caused by
extensions. As KWin is a heavy user of extensions not of interest to Qt
(e.g. damage or composite) we do our own error code mapping.
The Xcb::ExtensionData is extended by a vector of OpCodes and ErrorNames.
In ::workspaceEvent it's checked whether the event is an error and if
that is the case KWin tries to map the error to one of the extensions.
If that is successful it prints a warning looking like Qt's one:
XCB error: 151 (BadDamage), sequence: 12534, resource id: 127926362, \
major code: 143 (DAMAGE), minor code: 2 (Destroy)
and the event gets filtered out, so that the Qt error messages is not
printed in addition.
If the error is not from one of the extensions the error is not filtered
out and so the default Qt behavior gets applied.
REVIEW: 117421
Adding a const variant for ::data() to remove an unexpected copy.
To complete also the bool cast operator and isNull get a const
variant.
REVIEW: 117469
If the user actions menu is closed Qt looks for a QWidget at the mouse
position. If it finds one it tries to activate and raise it. If the
QWidget at the mouse position is a window decoration, it gets raised
above the Client. This makes the window unfortunately unusable.
To prevent this from happening we listen for the ZOrderChange event
in our event filter on the decoration widget and unconditionally lower
the decoration widget again - we never want the decoration widget to
be above our Client, so we can just always lower it. We have to use
the low level functionality and cannot use QWidget::lower as that would
result in a loop.
broke on interim Wrapper() constructor change
The Constructor needs to explicitly pass
XCB_WINDOW_NONE to the inherited Constructor to
trigger a request
Thanks to Alex Leach for finding this
CCBUG: 256242
FIXED-IN: 4.11.2
REVIEW: 112595
During startup we only create the request, the reply will be fetched
once the atom is needed.
To make proper use of this async behavior the creation of Atoms is
moved directly to the claim of the manager selection, so they can be
fetched while we wait for the previous manager selection to give up
on it.
We have windows which we don't want to destroy (e.g. the managed
clients) but still would like to be able to use the nicer API.
Therefore the not creating ctor and reset method have a second bool
arg to whether destroy the window or not. Default is to keep the
RAII functionality.
Wrapped in xcbutils.
In addition the check whether another WM is running in main.cpp is
improved by doing a checked request and directly checking for the
error. If there is an error, KWin puts out an error message and
quits.
This dependency is causing build problems on a number of systems,
and it doesn't make much sense to bring in a whole library for three
one-line convenience functions.
xcb/xcb_iccm.h isn't C++ safe (some versions) because it has
a variable called "class" in function signatures. The hack
is to define "class" to something else before that header is
included, and then undef "class" immediately afterwards.
CCMAIL: mgraesslin@kde.org, fredrik@kde.org
The type of the transient_for related variables are changed to
xcb_window_t. They cannot be Xcb::Window as we don't take ownership over
the transient for window.
Variables are renamed to m_camelCase to follow naming scheme.
A wrapper for retrieving the TransientFor hint is added to the Xcb
Wrappers.
KWin::Cursor can track changes to the cursor image. It supports a
start/stop tracking to not handle these events if nobody is interested in
them. When enabled and the cursor image changes a signal is emitted with
the serial number of the new cursor image.
To track cursor image changes xcb_xfixes_select_cursor_input is used (see
XFixes Version 5.0 protocol, section 7).
This could be useful for the zoom effect when it replaces the cursor.
REVIEW: 110519
