Currently, managed and override-redirect windows are split in two types:
X11Window and Unmanaged. While looking at it strictly from type
perspective, this is great. But it creates other problems, e.g. we need
to put shared X11-specific code in the base Window class or mess with
"base" classes.
As an alternative solution, this change merges the Unmanaged class into
the X11Window class and disables some functionality based on the value
of isUnmanaged().
X11Window::manage() is used to create a managed Window. X11Window::track()
is used to create an unmanaged Window.
As a first step to move away from having an external service remember output settings
for KWin, this commit introduces an output manager that can load configuration files
and generate new output configurations.
It should be irrelevant to the scripts and there's no matching
abstraction on wayland.
is_shape is made protected, but it will be eventually moved to an X11
specific subclass.
Currently, the normal window lifecycle looks as follows: create Window,
wait until it's shown, add it to Workspace, wait until it's closed,
create a Deleted, copy properties from the original window to the
deleted one, destroy the original window, wait until the last deleted
window reference is dropped.
There are a couple of issues with this design: we can't nicely
encapsulate X11 or Wayland specific implementation details if they need
to be accessed for closed windows; manual copying of properties is
cumbersome and error prone and we've had a dozen of cases where effects
worked incorrectly because some properties had not been copied.
The goal of this patch is to drop Deleted and extend the lifetime of the
original window, but with a special state set: Window::isDeleted().
The main danger is that somebody can try to do something with deleted
windows that they should not do, but on the other hand, such code needs
to be guarded with relevant checks too.
When closing a window, we may need to change parent-child relationship
between windows, but we need to preserve stacking order constraints so
dialogs are placed above their parents when they're closed.
This is needed to ensure that Window::isScreenLocker() returns a good
value for closed windows. Also, it's needed to get rid of
ClientConnection::aboutToBeDestroyed() connection, which can cause
problems with window teardown.
If a transient parent is removed, X11Window::removeTransient() will try
to upgrade the transient to a group transient.
On the other hand, that code is broken because Window::removeTransient()
will unset transientFor() so we never hit the code path in the if
statement.
While we could fix it, I think it's not worth it because transient
handling code is already mental and making group transients and normal
transients disjoint will help to keep the things simpler.
Apparently CMAKE_AUTOMOC_MACRO_NAMES modifications are not visible in
sibling directories. To work around that, populate
CMAKE_AUTOMOC_MACRO_NAMES with libkwineffects plugin macros in the
top level CMakeLists.txt file.
QtConcurrent::run()'s return type is marked with [[nodiscard]], which is
not nice to code that just needs to move some tasks to a worker thread.
On the other hand, QThreadPool satisfies our needs too and Qt doesn't
need to construct futures that we won't use.
One remark about the screenshot plugin: the task lambda is mutable so it
cannot be represented using a std::function.
Workspace::outputAt() casts vectors to four rectangle corners and uses
the shortest one to decide which output is the closest to the given
point.
This works poorly on dual monitor setups where on the left side you have
a monitor with landscape orientation and one with portrait orientation
on the right hand side. In that case, outputAt() will prefer the left
monitor even though the right monitor is the closest one if you cast a
perpendicular from the given point to the right monitor.
In order to improve the handling of that case, this change makes
Workspace::outputAt() compute the closest point to the output geometry
rectangle and use the squared distance as the score.
The indirection contributes unnecessary complexity. The usage of
std::weak_ptr and std::shared_ptr complicates the things further, e.g.
---
Ideally, same should be done with TabBox and TabBoxHandler, but that can be done in another MR.
"label" is already used.
Warning: The name 'label' (QLabel) is already in use, defaulting to 'label1'.
Warning: The name 'label' (QLabel) is already in use, defaulting to 'label2'.
Deleted windows are no longer destroyed using deleteLater(). They will
be destroyed immediately as Workspace goes through the window list
because the effects will be unloaded by that time.
Tabbox supports two operation modes: switching between windows and
desktops. Switching between windows is more commonly used. Desktop
switching is not exposed in user settings and it requires some advanced
knowledge of kwin's internals to enable it.
On the other hand, over the past years, we've double downed on effects
like desktop grid and overview to provide graphical means to switch
between virtual desktops.
This change drops desktop switching because it's effectively unused to
simplify the tabbox code, which can be very handy for the future
refactorings of window switching.
