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x11: Handle selection windows being destroyed before new selection

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Wine destroys its old selection window immediately before creating a new
selection. This would trigger restoring the clipboard, which would
overwrite the new selection with the old one. The selection window
however can also be destroyed as part of the shutdown process of
applications, such as Chromium for example. In those cases we want the
clipboard to be restored after the selection window has been destroyed.

Solve this by not immediately restoring the clipboard but instead using
a timeout which can be canceled by any new selection owner, such as in
the Wine case.

Fixes https://gitlab.gnome.org/GNOME/mutter/-/issues/1338
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1369

(cherry picked from commit e1c4e55880)
This commit is contained in:
Sebastian Keller 2020-07-14 19:02:06 +02:00 committed by Robert Mader
parent 3dab5120ed
commit 299569c3b8
2 changed files with 36 additions and 0 deletions
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1
src/x11/meta-x11-display-private.h
View File

@ -127,6 +127,7 @@ struct _MetaX11Display
struct {
Window xwindow;
guint timeout_id;
MetaSelectionSource *owners[META_N_SELECTION_TYPES];
GCancellable *cancellables[META_N_SELECTION_TYPES];

35
src/x11/meta-x11-selection.c
View File

@ -311,6 +311,22 @@ source_new_cb (GObject *object,
g_free (data);
}
static gboolean
unset_clipboard_owner (gpointer data)
{
MetaDisplay *display = meta_get_display ();
MetaSelection *selection = meta_display_get_selection (display);
MetaX11Display *x11_display = meta_display_get_x11_display (display);
meta_selection_unset_owner (selection, META_SELECTION_CLIPBOARD,
x11_display->selection.owners[META_SELECTION_CLIPBOARD]);
g_clear_object (&x11_display->selection.owners[META_SELECTION_CLIPBOARD]);
x11_display->selection.timeout_id = 0;
return G_SOURCE_REMOVE;
}
static gboolean
meta_x11_selection_handle_xfixes_selection_notify (MetaX11Display *x11_display,
XEvent *xevent)
@ -325,6 +341,9 @@ meta_x11_selection_handle_xfixes_selection_notify (MetaX11Display *x11_display,
selection = meta_display_get_selection (meta_get_display ());
if (selection_type == META_SELECTION_CLIPBOARD)
g_clear_handle_id (&x11_display->selection.timeout_id, g_source_remove);
if (x11_display->selection.cancellables[selection_type])
{
g_cancellable_cancel (x11_display->selection.cancellables[selection_type]);
@ -345,6 +364,19 @@ meta_x11_selection_handle_xfixes_selection_notify (MetaX11Display *x11_display,
meta_selection_set_owner (selection, selection_type, source);
g_object_unref (source);
}
else if (event->subtype == XFixesSelectionWindowDestroyNotify &&
selection_type == META_SELECTION_CLIPBOARD)
{
/* Selection window might have gotten destroyed as part of application
* shutdown. Trigger restoring clipboard, but wait a bit, because some
* clients, like wine, destroy the old window immediately before a new
* selection. Restoring the clipboard in this case would overwrite the
* new selection, so this will be cancelled when a new selection
* arrives. */
x11_display->selection.timeout_id = g_timeout_add (10,
unset_clipboard_owner,
NULL);
}
else
{
/* An X client went away, clear the selection */
@ -422,6 +454,7 @@ meta_x11_selection_init (MetaX11Display *x11_display)
attributes.event_mask = PropertyChangeMask | SubstructureNotifyMask;
attributes.override_redirect = True;
x11_display->selection.timeout_id = 0;
x11_display->selection.xwindow =
XCreateWindow (x11_display->xdisplay,
x11_display->xroot,
@ -482,4 +515,6 @@ meta_x11_selection_shutdown (MetaX11Display *x11_display)
XDestroyWindow (x11_display->xdisplay, x11_display->selection.xwindow);
x11_display->selection.xwindow = None;
}
g_clear_handle_id (&x11_display->selection.timeout_id, g_source_remove);
}