When using the Super+Tab hotkey then all windows will be displayed,
and we will switch to another virtual desktop if needed.
When using the Alt+Tab hotkey then only the windows on the current
desktop will be displayed.
This also adds the ability to query how many virtual desktops are
set up, and for the Taskbar to be notified when the active virtual
desktop has changed.
This creates a 2-dimensional array of WindowStack instances, one for
each virtual desktop. The main desktop 0,0 is the main desktop, which
is the desktop used for all stationary windows (e.g. taskbar, desktop).
When adding windows to a desktop, stationary windows are always added
to the main desktop.
When composing the desktop, there are usually two WindowStacks
involved. For stationary windows, the main desktop will be traversed,
and for everything else the current virtual desktop will be iterated.
Iteration is interweaved to preserve the correct order. During the
transition animation, two WindowStacks will be iterated at the same
time.
This removes StringView::find_first_of(char) and find_last_of(char) and
replaces all its usages with find and find_last respectively. This is
because those two methods are functionally equivalent.
find_{first,last}_of should only be used if searching for multiple
different characters, which is never the case with the char argument.
This also adds the [[nodiscard]] to the remaining find_{first,last}_of
methods.
Since this is always set to true on the non-default constructor and
subsequently never modified, it is somewhat pointless. Furthermore,
there are arguably no invalid relative paths.
The time interval for animations is most often described as `duration`
in animation contexts and the `WindowServer::Animation` class
should reflect that.
The menus always thought they were being outside of the main screen,
which caused them to be left and/or top aligned. This also fixes the
calculation of the available space by using the screen rectangle where
it will be displayed.
To make Assistant useful we need a way to quickly trigger it. I've
added a new specialized event coming from the window server for when a
user is holding down 'Super' and hits 'Space'.
The Taskbar will be able to listen for this event and spawn a new
instance of the Assistant if it's not already running.
Since being tiled means we restrict rendering a window to the screen it
is on (so that we don't "bleed" into an adjacent screen), we need to
untile it if the window either can't fit into the screen, or it is
detached from the screen edges.
The launch_origin_rect parameter to create_window() specifies where on
screen the window was launched from. It's optional, but if you provide
it, the new window will have a short wireframe animation from the origin
to the initial window frame rect.
GUI::Window looks for the "__libgui_launch_origin_rect" environment
variable. Put your launch origin rect in there with the format
"<x>,<y>,<width>,<height>" and the first GUI::Window shown by the app
will use that as the launch origin rect.
Also it looks pretty neat, although I'm sure we can improve it. :^)
This patch adds the WindowServer::Animation class, which represents
a simple animation driven by the compositor.
An animation has a length (in milliseconds) and two hooks:
- on_update: called whenever the animation should render something.
- on_stop: called when the animation is finished and/or stopped.
This patch also ports the window minimization animation to this new
mechanism. :^)
We regularily need to flush many rectangles, so instead of making many
expensive ioctl() calls to the framebuffer driver, collect the
rectangles and only make one call. And if we have too many rectangles
then it may be cheaper to just update the entire region, in which case
we simply convert them all into a union and just flush that one
rectangle instead.
This fixes a regression where the geometry label isn't updating even
though the window geometry had changed because the geometry label's
location isn't changing.
An Overlay is similar to a transparent window, but has less overhead
and does not get rendered within the window stack. Basically, the area
that an Overlay occupies forces transparency rendering for any window
underneath, which allows us to render them flicker-free.
This also adds a new API that allows displaying the screen numbers,
e.g. while the user configures the screen layout in DisplaySettings
Because other things like drag&drop or the window-size label are not
yet converted to use this new mechanism, they will be drawn over the
screen-number currently.
If a window which has an active modal window is focused, the modal
window starts blinking. In this case, the window (and modal) should
still be focused. For this, the order of the checks in
process_mouse_event_for_window has to be changed.
This fixes#8183.
Since MultiScaleBitmaps only loads icons for the scales in use, we need
to unconditionally reload them so that we pick up the correct bitmaps
for a scale that hasn't been previously used.
This enables the shot utility to capture all screens or just one, and
enables the Magnifier application to track the mouse cursor across
multiple screens.
This enables rendering of mixed-scale screen layouts with e.g. high
resolution cursors and window button icons on high-dpi screens while
using lower resolution bitmaps on regular screens.
This sets the stage so that DisplaySettings can configure the screen
layout and set various screen resolutions in one go. It also allows
for an easy "atomic" revert of the previous settings.
If there are any screens that are detached from other screens it would
not be possible to get to them using the mouse pointer. Also make sure
that none of the screens are overlapping.
We were calculating the old window rectangle after changing window
states that may affect these calculations, which sometimes resulted
in artifacts left on the screen, particularily when tiling a window
as this now also constrains rendering to one screen.
Instead, just calculate the new rectangle and use the window's
occlusion information to figure out what areas need to be invalidated.
When a window is maximized or tiled then we want to constrain rendering
that window to the screen it's on. This prevents "bleeding" of the
window frame and shadow onto the adjacent screen(s).
This allows WindowServer to use multiple framebuffer devices and
compose the desktop with any arbitrary layout. Currently, it is assumed
that it is configured contiguous and non-overlapping, but this should
eventually be enforced.
To make rendering efficient, each window now also tracks on which
screens it needs to be rendered. This way we don't have to iterate all
the windows for each screen but instead use the same rendering loop and
then only render to the screen (or screens) that the window actually
uses.
Some paths of the mouse event processing code will upgrade the event
from a regular MouseDown to a MouseDoubleClick. That's why we were
passing `MouseEvent&` everywhere.
For the paths that don't need to do this, passing `MouseEvent const&`
reduces the cognitive burden a bit, so let's do that.
Instead of plumbing a Window* through the entire mouse event processing
logic, just do a hit test and say that the window under the cursor is
the hovered window.
It's funny how much easier this is now that we have a way to hit test
the entire window stack with one call.
Move the logic for processing a mouse event that hits a specific window
into its own function.
If the window is blocked by a modal child, we now get that out of the
way first, so we don't have to think about it later.
Even if a window is in fullscreen mode, we still want hit testing to
walk the window stack. Otherwise child windows of the fullscreen
window will not receive mouse events.
The button widgets internally rendered by WindowServer are only used
in titlebars, and require a bit of mouse event handling. Instead of
mixing it with the window-oriented mouse event handling, get the
button event stuff out of the way first.
