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Fix problems with focus tracking

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When a client spontaneously focuses their window, perhaps in response
to WM_TAKE_FOCUS we'll get a FocusOut/FocusIn pair with same serial.
Updating display->focus_serial in response to FocusOut then was causing
us to ignore FocusIn and think that the focus was not on any window.

We need to distinguish this spontaneous case from the case where we
set the focus ourselves - when we set the focus ourselves, we're careful
to combine the SetFocus with a property change so that we know definitively
what focus events we have already accounted for.

https://bugzilla.gnome.org/show_bug.cgi?id=720558
This commit is contained in:
Owen W. Taylor 2013-12-16 16:01:04 -05:00
parent b7e62d3ca5
commit 6891ce95dc
2 changed files with 27 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/core/display-private.h
View File

@ -138,6 +138,14 @@ struct _MetaDisplay
*/ */
guint allow_terminal_deactivation : 1; guint allow_terminal_deactivation : 1;
/* If true, server->focus_serial refers to us changing the focus; in
* this case, we can ignore focus events that have exactly focus_serial,
* since we take care to make another request immediately afterwards.
* But if focus is being changed by another client, we have to accept
* multiple events with the same serial.
*/
guint focused_by_us : 1;
guint static_gravity_works : 1; guint static_gravity_works : 1;
/*< private-ish >*/ /*< private-ish >*/

25
src/core/display.c
View File

@ -1865,9 +1865,11 @@ static void
update_focus_window (MetaDisplay *display, update_focus_window (MetaDisplay *display,
MetaWindow *window, MetaWindow *window,
Window xwindow, Window xwindow,
gulong serial) gulong serial,
gboolean focused_by_us)
{ {
display->focus_serial = serial; display->focus_serial = serial;
display->focused_by_us = focused_by_us;
if (display->focus_xwindow == xwindow) if (display->focus_xwindow == xwindow)
return; return;
@ -1978,7 +1980,8 @@ request_xserver_input_focus_change (MetaDisplay *display,
update_focus_window (display, update_focus_window (display,
meta_window, meta_window,
xwindow, xwindow,
serial); serial,
TRUE);
meta_error_trap_pop (display); meta_error_trap_pop (display);
@ -2092,12 +2095,20 @@ handle_window_focus_event (MetaDisplay *display,
else else
g_return_if_reached (); g_return_if_reached ();
if (display->server_focus_serial > display->focus_serial) /* If display->focused_by_us, then the focus_serial will be used only
* for a focus change we made and have already accounted for.
* (See request_xserver_input_focus_change().) Otherwise, we can get
* multiple focus events with the same serial.
*/
if (display->server_focus_serial > display->focus_serial ||
(!display->focused_by_us &&
display->server_focus_serial == display->focus_serial))
{ {
update_focus_window (display, update_focus_window (display,
focus_window, focus_window,
focus_window ? focus_window->xwindow : None, focus_window ? focus_window->xwindow : None,
display->server_focus_serial); display->server_focus_serial,
FALSE);
} }
} }
@ -2167,7 +2178,8 @@ event_callback (XEvent *event,
display->current_time = event_get_time (display, event); display->current_time = event_get_time (display, event);
display->monitor_cache_invalidated = TRUE; display->monitor_cache_invalidated = TRUE;
if (event->xany.serial > display->focus_serial && if (display->focused_by_us &&
event->xany.serial > display->focus_serial &&
display->focus_window && display->focus_window &&
!window_has_xwindow (display->focus_window, display->server_focus_window)) !window_has_xwindow (display->focus_window, display->server_focus_window))
{ {
@ -2176,7 +2188,8 @@ event_callback (XEvent *event,
update_focus_window (display, update_focus_window (display,
meta_display_lookup_x_window (display, display->server_focus_window), meta_display_lookup_x_window (display, display->server_focus_window),
display->server_focus_window, display->server_focus_window,
display->server_focus_serial); display->server_focus_serial,
FALSE);
} }
screen = meta_display_screen_for_root (display, event->xany.window); screen = meta_display_screen_for_root (display, event->xany.window);