This adds initial support for defining key and mouse bindings that are
applied in different terminal modes/states.
For example, there are two arrays dealing with key and mouse bindings
in the "normal" mode. Most bindings will go here.
There's also an array for "search" mode. These bindings will be used
when the user has started a scrollback search.
In the future, there may be a model selection mode as well. Or maybe
"search" and "modal selection" will be combined into a single
"keyboard" mode. We'll see.
Since the keyboard bindings depend on the current XKB keymap,
translation from the user specified key combination string cannot be
done when loading the configuration, but must be done when we've
received a keymap from the wayland server.
We should explore if it's possible to load some kind of default keymap
just to be able to verify the validity of the key combination strings
at configuration load time, to be able to reject the configuration at
startup.
A couple of key bindings have been added as proof of concept.
Mouse bindings aren't handled at all yet, and is likely to be
re-written. For example, we can probably translate the configuration
strings at configuration load time.
Handle the CSDs and the search box the same way we handle the main
grid; when we need to redraw them, call
render_refresh_{csd,search}(). This sets a flag that is checked after
each FDM iteration. All actual rendering is done here.
This also ties the commits of the Wayland sub-surfaces to the commit
of the main surface.
The user can now configure the following:
* Whether to prefer CSDs or SSDs. But note that this is only a hint to
the compositor - it may deny our request. Furthermore, not all
compositors implement the decoration manager protocol, meaning CSDs
will be used regardless of the user configuration (GNOME/mutter
being the most prominent one).
* Title bar size and color, including transparency
* Border size and color, including transparency
Also drop support for rendering the CSDs inside the main surface.
When the user left-clicks the title-bar, we start a timer. When the
timer has elapsed, we initiate a 'move' operation.
However, if the user clicked, and then started dragging right away,
there was a very visible lag since we waited for the timeout before
starting the move.
Now, on a pointer motion event we detect a running 'move' timer, and
abort it and instead start the 'move' operation right away.
I'm not sure why I added this in the first place... our cursor doesn't
depend on keyboard focus.
Furthermore, with CSDs, we may get keyboard enter events for the CSD
surfaces, and these should definitely *not* update the xcursor
as if it was inside the main surface.
Apparently, a frame callback for the cursor surface is *never*
triggered if we get a pointer-leave event *before* the callback is
triggered. At least on Sway 1.4.
This caused the cursor being stuck, and never updating once this state
was reached.
Fix by destroying the cursor frame callback on pointer-leave.
This adds a flag, -p,--presentation-timings, that enables input lag
measuring using the presentation time Wayland protocol.
When enabled, we store a timestamp when we *send* a key to the
slave. Then, when we commit a frame for rendering to the compositor,
we request presentation feedback. We also store a timestamp for when
the frame was committed.
The 'presented' callback then looks at the input and commit
timestamps, and compares it with the presented timestamp.
The delay is logged at INFO when the delay was less than one frame
interval, at WARN when it was one frame interval, and at ERR when it
was two or more frame intervals.
We also update statistic counters that we log when foot is shut down.
The mouse reporting functions are called from input when we receive
Wayland mouse events.
We used to pass the current keyboard modifier (shift, alt, ctrl, etc)
to the terminal functions.
This however is wrong, since we may receive Wayland mouse events
without having keyboard focus. When we don't have keyboard focus, the
modifier state doesn't apply to us.
Remove the modifier arguments from the terminal mouse reporting
functions. These functions now read this state directly instead, but
only when the terminal instance in question has keyboard focus.
