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xwayland: fix issue with panel getting stuck offscreen

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For unknown reasons, XWayland surfaces that are completely offscreen
seem not to generate commit events. In rare cases, this can prevent an
offscreen window from moving onscreen (since we wait for a commit event
that never occurs). As a workaround, move offscreen surfaces
immediately.

This fixes an issue that I can reproduce by having qmpanel displayed on
a (larger) external monitor, then undocking the laptop so that qmpanel
requests a simultaneous move+resize to the (smaller) laptop display.
This commit is contained in:
John Lindgren 2023-11-28 00:38:18 -05:00
parent 481b849152
commit 314538daef
1 changed files with 13 additions and 2 deletions
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15
src/xwayland.c
View file

@ -311,9 +311,20 @@ xwayland_view_configure(struct view *view, struct wlr_box geo)
wlr_xwayland_surface_configure(xwayland_surface_from_view(view),
geo.x, geo.y, geo.width, geo.height);
/*
* For unknown reasons, XWayland surfaces that are completely
* offscreen seem not to generate commit events. In rare cases,
* this can prevent an offscreen window from moving onscreen
* (since we wait for a commit event that never occurs). As a
* workaround, move offscreen surfaces immediately.
*/
bool is_offscreen = !wlr_box_empty(&view->current) &&
!wlr_output_layout_intersects(view->server->output_layout, NULL,
&view->current);
/* If not resizing, process the move immediately */
if (view->current.width == geo.width
&& view->current.height == geo.height) {
if (is_offscreen || (view->current.width == geo.width
&& view->current.height == geo.height)) {
view->current.x = geo.x;
view->current.y = geo.y;
view_moved(view);