File mutter-bsc984738-grab-display.patch of Package mutter

Overview Repositories Revisions Requests Users Attributes Meta

File mutter-bsc984738-grab-display.patch of Package mutter (Revision 01a4fdd00fcbaa0e717969cc9943713c)

Currently displaying revision 01a4fdd00fcbaa0e717969cc9943713c , Show latest

diff --git a/src/core/display-private.h b/src/core/display-private.h
index 531c6f7..aaa90ec 100644
--- a/src/core/display-private.h
+++ b/src/core/display-private.h
@@ -174,6 +174,8 @@ struct _MetaDisplay
   GHashTable *stamps;
   GHashTable *wayland_windows;
 
+  int server_grab_count;
+
   /* serials of leave/unmap events that may
    * correspond to an enter event we should
    * ignore
@@ -322,6 +324,8 @@ struct _MetaDisplayClass
 gboolean      meta_display_open                (void);
 void          meta_display_close               (MetaDisplay *display,
                                                 guint32      timestamp);
+void          meta_display_grab                (MetaDisplay *display);
+void          meta_display_ungrab              (MetaDisplay *display);
 
 void          meta_display_unmanage_windows_for_screen (MetaDisplay *display,
                                                         MetaScreen  *screen,
diff --git a/src/core/display.c b/src/core/display.c
index 4c7a00e..87e3307 100644
--- a/src/core/display.c
+++ b/src/core/display.c
@@ -585,6 +585,7 @@ meta_display_open (void)
   display->focus_serial = 0;
   display->server_focus_window = None;
   display->server_focus_serial = 0;
+  display->server_grab_count = 0;
 
   display->mouse_mode = TRUE; /* Only relevant for mouse or sloppy focus */
   display->allow_terminal_deactivation = TRUE; /* Only relevant for when a
@@ -1130,6 +1131,50 @@ meta_display_close (MetaDisplay *display,
   meta_quit (META_EXIT_SUCCESS);
 }
 
+/* Grab/ungrab routines taken from fvwm.
+ * Calling this function will cause X to ignore all other clients until
+ * you ungrab. This may not be quite as bad as it sounds, yet there is
+ * agreement that avoiding server grabs except when they are clearly needed
+ * is a good thing.
+ *
+ * If you do use such grabs, please clearly explain the necessity for their
+ * usage in a comment. Try to keep their scope extremely limited. In
+ * particular, try to avoid emitting any signals or notifications while
+ * a grab is active (if the signal receiver tries to block on an X request
+ * from another client at this point, you will have a deadlock).
+ */
+void
+meta_display_grab (MetaDisplay *display)
+{
+  if (display->server_grab_count == 0)
+    {
+      XGrabServer (display->xdisplay);
+    }
+  display->server_grab_count += 1;
+  meta_verbose ("Grabbing display, grab count now %d\n",
+                display->server_grab_count);
+}
+
+void
+meta_display_ungrab (MetaDisplay *display)
+{
+  if (display->server_grab_count == 0)
+    meta_bug ("Ungrabbed non-grabbed server\n");
+
+  display->server_grab_count -= 1;
+  if (display->server_grab_count == 0)
+    {
+      /* FIXME we want to purge all pending "queued" stuff
+       * at this point, such as window hide/show
+       */
+      XUngrabServer (display->xdisplay);
+      XFlush (display->xdisplay);
+    }
+
+  meta_verbose ("Ungrabbing display, grab count now %d\n",
+                display->server_grab_count);
+}
+
 /**
  * meta_display_for_x_display:
  * @xdisplay: An X display
@@ -1516,7 +1561,7 @@ request_xserver_input_focus_change (MetaDisplay *display,
    * we know which is which by making two requests that the server will
    * process at the same time.
    */
-  XGrabServer (display->xdisplay);
+  meta_display_grab (display);
 
   serial = XNextRequest (display->xdisplay);
 
@@ -1529,8 +1574,7 @@ request_xserver_input_focus_change (MetaDisplay *display,
                    display->atom__MUTTER_FOCUS_SET,
                    XA_STRING, 8, PropModeAppend, NULL, 0);
 
-  XUngrabServer (display->xdisplay);
-  XFlush (display->xdisplay);
+  meta_display_ungrab (display);
 
   meta_display_update_focus_window (display,
                                     meta_window,
diff --git a/src/core/keybindings.c b/src/core/keybindings.c
index ed34aea..a989200 100644
--- a/src/core/keybindings.c
+++ b/src/core/keybindings.c
@@ -979,6 +979,9 @@ meta_display_grab_window_buttons (MetaDisplay *display,
 {
   MetaKeyBindingManager *keys = &display->key_binding_manager;
 
+  if (display->server_grab_count > 0)
+    return;
+
   /* Grab Alt + button1 for moving window.
    * Grab Alt + button2 for resizing window.
    * Grab Alt + button3 for popping up window menu.
@@ -1015,6 +1018,9 @@ meta_display_ungrab_window_buttons (MetaDisplay *display,
 {
   MetaKeyBindingManager *keys = &display->key_binding_manager;
 
+  if (display->server_grab_count > 0)
+    return;
+
   if (keys->window_grab_modifiers == 0)
     return;
 
@@ -1041,6 +1047,9 @@ meta_display_grab_focus_window_button (MetaDisplay *display,
 {
   MetaKeyBindingManager *keys = &display->key_binding_manager;
 
+  if (display->server_grab_count > 0)
+    return;
+
   /* Grab button 1 for activating unfocused windows */
   meta_verbose ("Grabbing unfocused window buttons for %s\n", window->desc);
 
@@ -1080,6 +1089,9 @@ meta_display_ungrab_focus_window_button (MetaDisplay *display,
 {
   MetaKeyBindingManager *keys = &display->key_binding_manager;
 
+  if (display->server_grab_count > 0)
+    return;
+
   meta_verbose ("Ungrabbing unfocused window buttons for %s\n", window->desc);
 
   if (!window->have_focus_click_grab)
@@ -1309,6 +1321,9 @@ meta_window_grab_keys (MetaWindow  *window)
   MetaDisplay *display = window->display;
   MetaKeyBindingManager *keys = &display->key_binding_manager;
 
+  if (display->server_grab_count > 0)
+    return;
+
   if (window->all_keys_grabbed)
     return;
 
@@ -1348,6 +1363,9 @@ meta_window_ungrab_keys (MetaWindow  *window)
       MetaDisplay *display = window->display;
       MetaKeyBindingManager *keys = &display->key_binding_manager;
 
+      if (display->server_grab_count > 0)
+        return;
+
       if (window->grab_on_frame &&
           window->frame != NULL)
         change_window_keygrabs (keys, window->frame->xwindow, FALSE);
diff --git a/src/x11/window-x11.c b/src/x11/window-x11.c
index 3d47f0d..5ea1213 100644
--- a/src/x11/window-x11.c
+++ b/src/x11/window-x11.c
@@ -507,6 +507,8 @@ meta_window_x11_manage (MetaWindow *window)
 
   meta_icon_cache_init (&priv->icon_cache);
 
+  meta_display_grab (display);
+
   meta_display_register_x_window (display, &window->xwindow, window);
 
   /* assign the window to its group, or create a new group if needed */
@@ -565,6 +567,13 @@ meta_window_x11_manage (MetaWindow *window)
 
   meta_window_x11_update_shape_region (window);
   meta_window_x11_update_input_region (window);
+
+  meta_display_ungrab (display);
+
+  /* Perform operations prevented by grab */
+  if (window->frame)
+    meta_display_grab_window_buttons (display, window->frame->xwindow);
+  meta_window_grab_keys (window);
 }
 
 static void

Places

File mutter-bsc984738-grab-display.patch of Package mutter (Revision 01a4fdd00fcbaa0e717969cc9943713c)

Places