- add LAB_WINDOW_TYPE_INVALID in place of literal -1
- document more clearly that enum lab_view_criteria is a bitset
- other one-off replacements of integer values/types for consistency
Note: variables of type enum lab_view_criteria are already used
extensively throughout the code to contain combinations of the declared
enum values. I am not introducing any new usage here, just changing the
single uint32_t to be consistent with all the other usages.
I like the new common/edge.h. I don't like how inconsistently we use it.
Current situation:
- enum wlr_edges and wlr_direction are designed to be used as bitset,
and are defined compatibly
- enum lab_edge is *also* designed to be used as bitset, but
incompatible with the others (LEFT/RIGHT come before UP/DOWN)
- we use an inconsistent mix of all three *AND* uint32_t (usually with
the WLR_EDGE constants rather than the LAB_EDGE constants), and
convert between them on an ad-hoc basis, sometimes implicitly
Let's clean this up:
- reorder enum lab_edge to be compatible with the two wlr enums
(check this by static_assert)
- use TOP/BOTTOM naming rather than UP/DOWN (matches wlr_edges)
- add constants for the remaining possible combinations of the 4 edges
- use lab_edge for all internal edge/direction fields, consistently
- add lab_edge_is_cardinal() as a sanity check before casting to
enum wlr_direction, and then eliminate all of direction.c/h
Instead of "enum wlr_edges direction", we now have
"enum lab_edge direction" which is not that much better. At least we
are now clear that we're overloading one enum with two meanings.
In addition to <snapping><range>, <snapping><cornerRange> configures the
distance from the screen corner to trigger quater window snapping.
Also, new values "up-left", "up-right", "down-left" and "down-right" are
allowed for <action name="(Toggle)SnapToEdge" direction="[value]"> and
<query tiled="[value]">.
In 9e3785f8cd, a heuristic was added to assume that NORMAL and DIALOG
window types were always focusable. (This was before we had the "offer
focus" mechanism in place.)
However, we should still call wlr_xwayland_surface_offer_focus() for
these views, in case they actually don't want focus. (This is uncommon
but has recently been seen with WeChat popups, which have both NORMAL
and UTILITY type.)
To make this possible, refine view_wants_focus() to return either
LIKELY or UNLIKELY for Globally Active input windows. This decouples
the question of "should we try to focus this view" from the actual
mechanism used to do so.
This patch also changes the semantics of scaled_icon_buffer: rather than
calling scaled_icon_buffer_set_app_id() every time an app_id is set, we
can now call scaled_icon_buffer_set_view() just once so that multiple
scaled_icon_buffers bound to a window are automatically updated when an
app_id is set or new icon is set via xdg-toplevel-icon-v1.
Offer focus by sending WM_TAKE_FOCUS to a client window supporting it.
The client may accept or ignore the offer. If it accepts, the surface will
emit a focus_in signal notifying the compositor that it has received focus.
The compositor should then call wlr_xwayland_surface_activate(surface, true).
This is a more compatible method of giving focus to windows using the
Globally Active input model (see wlr_xwayland_icccm_input_model()) than
calling wlr_xwayland_surface_activate() unconditionally, since there is no
reliable way to know in advance whether these windows want to be focused.
v2: add caution not to use view_offer_focus() directly
v3: remove obsolete comment
Before this commit, when a normal window is raised, xwayland thought it's
above always-on-top (AOT) windows even though it's actually below AOT
windows in the scene. This means mouse scroll events may be unexpectedly
sent to normal windows below AOT windows even when the cursor is hovering
over a AOT window.
So this commit fixes it by notifying the correct stacking order (where AOT
windows are placed above normal windows) to xwayland every time the
stacking order is updated.
Other benefits of this commit are:
- It makes the code more readable and predictable by aggregating logic
about stacking order management in xwayland (e.g. shaded windows or
windows in other workspaces should be notified to xwayland as being
placed at the bottom).
- As server->last_raised_view is removed in the previous commit, we were
notifying the stacking order to xwayland every time a window with dialog
windows is clicked (not when clicking a topmost window without dialogs,
due to some optimization in wlroots). This commit fixes this by caching
the window stacking order in xwayland_view->stacking_order and notifying
it to xwayland only when it's updated.
In the case of an initially-maximized view which is taking a long time
to un-maximize (seen for example with Thunderbird on slow machines), we
may end up in handle_configure_timeout() with an empty pending geometry.
In that case we have no great options (we can't center the view since we
don't know the un-maximized size yet), so set a fallback position.
v2: check wlr_box_empty() before comparing pending and current
Fixes: #2191
Currently, initially maximized (or fullscreen) xdg-shell views exhibit
one of two issues:
- some (e.g. GTK and Qt apps) paint an initial frame un-maximized
(before the "map" event) and only maximize in a later commit
- others (e.g. foot) maximize immediately without flicker, but never
store a valid natural size, so we end up using a fallback (640x480)
Under KWin, neither of these issues occur, so I looked into what labwc
is doing wrong. It seems that:
- wlroots internally sends an initial configure event with a size of
0x0 to all xdg-shell views. This requests the client to set its own
preferred (a.k.a. natural) size.
- For an initially maximized/fullscreen view, the initial configure
event should contain the maximized/fullscreen size rather than 0x0.
In labwc, this means we have to call wlr_xdg_toplevel_set_size()
earlier, i.e. from the new_surface event. Tracing with WAYLAND_DEBUG
shows that the initial configure event now has the correct geometry,
matching KWin behavior. With this change, GTK and Qt apps no longer
paint an incorrect un-maximized frame.
- However, this means that all xdg-shell views now suffer from the same
issue as foot, where we never receive a commit with the un-maximized
(natural) geometry. The correct way to get the natural geometry seems
to be to wait until we want to un-maximize, and send a configure
event of 0x0 at that point.
Sending a configure event of 0x0 when un-maximizing is a bit annoying as
it breaks some assumptions in labwc code. In particular:
- view->natural_geometry may now be unknown (0x0), requiring various
wlr_box_empty() checks sprinkled around. I added these in all the
obvious places, but there could be some code paths that I missed.
- Positioning the newly un-maximized view within view_maximize() no
longer works since we don't know the natural size. Instead we have to
run the positioning logic from the surface commit handler. This
results in some extra complexity, especially for interactive move.
See the new do_late_positioning() function in xdg.c.
Some TODOs/FIXMEs (non-blocking in my opinion):
- The view_wants_decorations() check is now duplicated in both the
new_surface and map event handlers. I'm not sure if this is necessary
but it seemed like the safest approach for now. More testing would be
nice, particularly with various combinations of config and client SSD
preferences.
- Aside from the interactive move case, the "late positioning" logic
always centers the view when un-maximizing, and does not invoke any
of the smart placement logic. If we want to invoke smart placement
here, I'd appreciate someone with more knowledge of that code to take
a look and figure out how to do that correctly.
<resize><drawContents>[yes|no] configures whether to let the clients
redraw its window content content while resizing.
When <resize><drawContents> is set to no, a multi-rect is shown to
indicate the geometry of the resized window.
Before this patch, labwc would happily kill itself when the user
called the `Kill` action when any xwayland view had focus.
The reason this happened was that wlroots creates the xwayland
wayland client via socketpair() and thus a lookup of the pid
of the socket connection would return the pid of labwc itself.
This patch fixes that by implementing different pid lookup
mechanisms based on the view implementation backend.
Fixes: #1739
