Request keyboard event reports from global keybindings of other windows

This allows mate-settings-daemon to honor global keybindings whenever
a different application has keybindings that seem conflicting, but are
usually not.

For example, an application defining a `Super_L` keybinding
and MATE having defining a shortcut that uses the `<Mod4>` key. They are
the same physical keyboard, but one is a modifier and the other is not.
Without requesting keyboard reports from other windows, the `<Mod4>`
shortcuts are swallowed whenever there is a `Super_L` shortcut
elsewhere.

(squashed cf0b97690c9d8606be4e07b58a4cf7070b53570d + 603e331e6cf480d2f9aed1e7d096333df39215aa for 1.18 branch)

1 files changed, 15 insertions, 1 deletions

diff --git a/plugins/keybindings/msd-keybindings-manager.c b/plugins/keybindings/msd-keybindings-manager.c
index 89ae0bc..c022547 100644
--- a/plugins/keybindings/msd-keybindings-manager.c
+++ b/plugins/keybindings/msd-keybindings-manager.c
@@ -538,20 +538,34 @@ msd_keybindings_manager_start (MsdKeybindingsManager *manager,
 {
         GdkDisplay  *dpy;
         GdkScreen   *screen;
+        GdkWindow   *window;
         int          screen_num;
         int          i;
+        Display     *xdpy;
+        Window       xwindow;
+        XWindowAttributes atts;
 
         g_debug ("Starting keybindings manager");
         mate_settings_profile_start (NULL);
 
         dpy = gdk_display_get_default ();
+        xdpy = GDK_DISPLAY_XDISPLAY (dpy);
         screen_num = gdk_display_get_n_screens (dpy);
 
         for (i = 0; i < screen_num; i++) {
                 screen = gdk_display_get_screen (dpy, i);
-                gdk_window_add_filter (gdk_screen_get_root_window (screen),
+                window = gdk_screen_get_root_window (screen);
+                xwindow = GDK_WINDOW_XID (window);
+
+                gdk_window_add_filter (window,
                                        (GdkFilterFunc) keybindings_filter,
                                        manager);
+
+                gdk_error_trap_push ();
+                /* Add KeyPressMask to the currently reportable event masks */
+                XGetWindowAttributes (xdpy, xwindow, &atts);
+                XSelectInput (xdpy, xwindow, atts.your_event_mask | KeyPressMask);
+                gdk_error_trap_pop_ignored ();
         }
         manager->priv->screens = get_screens_list ();