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gdk/wayland: Break only implicit grabs on wl_pointer.leave w/ pressed buttons

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The releasing of grabs while a button is pressed (e.g. after starting dnd, or
dragging the window, or going to overview with a pressed button, etc...) was
generalized here in https://gitlab.gnome.org/GNOME/gtk/-/merge_requests/1879.

However we shouldn't break all grabs here. In the case of grabbing popups,
compositors will still emit crossing events between client surfaces (e.g.
popping up and selecting a menu item via press-drag-release), breaking all
grabs here means inconsistent client state, that was
https://gitlab.gnome.org/GNOME/gtk/-/issues/2746.

That was fixed in mutter, by essentially making implicit grabs
owner_events=FALSE, however that breaks the mentioned use pattern entirely.
Mutter is changing this behavior back, so GTK should handle these crossing
events.

The grab that we are interested in breaking here is the implicit pointer
one. Popups will be dismissed via other means if the compositor says their
active grab needs breaking. This still leaves dnd/move/resize drags in
one place, while not allowing #2746 to happen with popups.
This commit is contained in:
Carlos Garnacho 2021-06-03 16:18:28 +02:00
parent c2d82c23e6
commit 8288d9e87c
1 changed files with 5 additions and 1 deletions
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6
gdk/wayland/gdkdevice-wayland.c
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@ -1550,6 +1550,7 @@ pointer_handle_leave (void *data,
GdkWaylandSeat *seat = data;
GdkEvent *event;
GdkWaylandDisplay *display_wayland = GDK_WAYLAND_DISPLAY (seat->display);
GdkDeviceGrabInfo *grab;
if (!surface)
return;
@ -1561,8 +1562,11 @@ pointer_handle_leave (void *data,
return;
_gdk_wayland_display_update_serial (display_wayland, serial);
grab = _gdk_display_get_last_device_grab (seat->display,
seat->logical_pointer);
if (seat->pointer_info.button_modifiers != 0)
if (seat->pointer_info.button_modifiers != 0 &&
grab && grab->implicit)
{
gulong display_serial;