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x11: Move focus sentinel to MetaX11Display

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This focus sentinel is a mechanism to avoid some X11-specific race
conditions in focus-follows-pointer, using X11 mechanisms. Move it to
MetaX11Display altogether.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/420
This commit is contained in:
Carlos Garnacho 2018-12-30 12:58:31 +01:00 committed by Jonas Ådahl
parent 439afb3f19
commit 0200f4fcd9
6 changed files with 48 additions and 46 deletions
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8
src/core/display-private.h
View File

@ -203,10 +203,6 @@ struct _MetaDisplay
MetaEdgeResistanceData *grab_edge_resistance_data;
unsigned int grab_last_user_action_was_snap;
/* we use property updates as sentinels for certain window focus events
* to avoid some race conditions on EnterNotify events
*/
int sentinel_counter;
int grab_resize_timeout_id;
MetaKeyBindingManager key_binding_manager;
@ -363,10 +359,6 @@ gboolean meta_grab_op_is_resizing (MetaGrabOp op);
gboolean meta_grab_op_is_mouse (MetaGrabOp op);
gboolean meta_grab_op_is_keyboard (MetaGrabOp op);
void meta_display_increment_focus_sentinel (MetaDisplay *display);
void meta_display_decrement_focus_sentinel (MetaDisplay *display);
gboolean meta_display_focus_sentinel_clear (MetaDisplay *display);
void meta_display_queue_autoraise_callback (MetaDisplay *display,
MetaWindow *window);
void meta_display_remove_autoraise_callback (MetaDisplay *display);

32
src/core/display.c
View File

@ -683,7 +683,6 @@ meta_display_open (void)
}
display->current_time = META_CURRENT_TIME;
display->sentinel_counter = 0;
display->grab_resize_timeout_id = 0;
display->grab_have_keyboard = FALSE;
@ -2490,37 +2489,6 @@ prefs_changed_callback (MetaPreference pref,
}
}
void
meta_display_increment_focus_sentinel (MetaDisplay *display)
{
unsigned long data[1];
data[0] = meta_display_get_current_time (display);
XChangeProperty (display->x11_display->xdisplay,
display->x11_display->xroot,
display->x11_display->atom__MUTTER_SENTINEL,
XA_CARDINAL,
32, PropModeReplace, (guchar*) data, 1);
display->sentinel_counter += 1;
}
void
meta_display_decrement_focus_sentinel (MetaDisplay *display)
{
display->sentinel_counter -= 1;
if (display->sentinel_counter < 0)
display->sentinel_counter = 0;
}
gboolean
meta_display_focus_sentinel_clear (MetaDisplay *display)
{
return (display->sentinel_counter == 0);
}
void
meta_display_sanity_check_timestamps (MetaDisplay *display,
guint32 timestamp)

10
src/core/window.c
View File

@ -1939,9 +1939,10 @@ idle_calc_showing (gpointer data)
while (tmp != NULL)
{
MetaWindow *window = tmp->data;
MetaDisplay *display = window->display;
if (!window->display->mouse_mode)
meta_display_increment_focus_sentinel (window->display);
if (display->x11_display && !display->mouse_mode)
meta_x11_display_increment_focus_sentinel (display->x11_display);
tmp = tmp->next;
}
@ -2411,6 +2412,7 @@ meta_window_show (MetaWindow *window)
gboolean needs_stacking_adjustment;
MetaWindow *focus_window;
gboolean notify_demands_attention = FALSE;
MetaDisplay *display = window->display;
meta_topic (META_DEBUG_WINDOW_STATE,
"Showing window %s, shaded: %d iconic: %d placed: %d\n",
@ -2577,7 +2579,7 @@ meta_window_show (MetaWindow *window)
meta_window_focus (window, timestamp);
}
else
else if (display->x11_display)
{
/* Prevent EnterNotify events in sloppy/mouse focus from
* erroneously focusing the window that had been denied
@ -2585,7 +2587,7 @@ meta_window_show (MetaWindow *window)
* ideas for a better way to accomplish the same thing, but
* they're more involved so do it this way for now.
*/
meta_display_increment_focus_sentinel (window->display);
meta_x11_display_increment_focus_sentinel (display->x11_display);
}
}

4
src/x11/events.c
View File

@ -882,7 +882,7 @@ handle_input_xevent (MetaX11Display *x11_display,
enter_event->mode != XINotifyGrab &&
enter_event->mode != XINotifyUngrab &&
enter_event->detail != XINotifyInferior &&
meta_display_focus_sentinel_clear (display))
meta_x11_display_focus_sentinel_clear (x11_display))
{
meta_window_handle_enter (window,
enter_event->time,
@ -1525,7 +1525,7 @@ handle_other_xevent (MetaX11Display *x11_display,
if (event->xproperty.atom ==
x11_display->atom__MUTTER_SENTINEL)
{
meta_display_decrement_focus_sentinel (display);
meta_x11_display_decrement_focus_sentinel (x11_display);
}
}
}

9
src/x11/meta-x11-display-private.h
View File

@ -135,6 +135,11 @@ struct _MetaX11Display
guint keys_grabbed : 1;
/* we use property updates as sentinels for certain window focus events
* to avoid some race conditions on EnterNotify events
*/
int sentinel_counter;
int composite_event_base;
int composite_error_base;
int composite_major_version;
@ -222,4 +227,8 @@ MetaLogicalMonitor *meta_x11_display_xinerama_index_to_logical_monitor (MetaX11D
void meta_x11_display_update_workspace_layout (MetaX11Display *x11_display);
void meta_x11_display_update_workspace_names (MetaX11Display *x11_display);
void meta_x11_display_increment_focus_sentinel (MetaX11Display *x11_display);
void meta_x11_display_decrement_focus_sentinel (MetaX11Display *x11_display);
gboolean meta_x11_display_focus_sentinel_clear (MetaX11Display *x11_display);
#endif /* META_X11_DISPLAY_PRIVATE_H */

31
src/x11/meta-x11-display.c
View File

@ -2177,3 +2177,34 @@ prefs_changed_callback (MetaPreference pref,
set_workspace_names (x11_display);
}
}
void
meta_x11_display_increment_focus_sentinel (MetaX11Display *x11_display)
{
unsigned long data[1];
data[0] = meta_display_get_current_time (x11_display->display);
XChangeProperty (x11_display->xdisplay,
x11_display->xroot,
x11_display->atom__MUTTER_SENTINEL,
XA_CARDINAL,
32, PropModeReplace, (guchar*) data, 1);
x11_display->sentinel_counter += 1;
}
void
meta_x11_display_decrement_focus_sentinel (MetaX11Display *x11_display)
{
x11_display->sentinel_counter -= 1;
if (x11_display->sentinel_counter < 0)
x11_display->sentinel_counter = 0;
}
gboolean
meta_x11_display_focus_sentinel_clear (MetaX11Display *x11_display)
{
return (x11_display->sentinel_counter == 0);
}