[mutter/wayland] Revert "keyboard: Remove focus listener"

[Jasper St. Pierre <jstpierre src gnome org>]

commit b2c18c4a7846bf5e358b18e10b1bb7f2bfa67402
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Tue Dec 3 10:46:57 2013 -0500

    Revert "keyboard: Remove focus listener"
    
    This reverts commit 0ac142d39e27e2692cbe0b18136a41bee424a6b0.

 src/wayland/meta-wayland-keyboard.c |   17 +++++++++++++++++
 src/wayland/meta-wayland-keyboard.h |    1 +
 2 files changed, 18 insertions(+), 0 deletions(-)
---
diff --git a/src/wayland/meta-wayland-keyboard.c b/src/wayland/meta-wayland-keyboard.c
index ec769e7..af16424 100644
--- a/src/wayland/meta-wayland-keyboard.c
+++ b/src/wayland/meta-wayland-keyboard.c
@@ -221,6 +221,16 @@ err_keymap_str:
   return;
 }
 
+static void
+lose_keyboard_focus (struct wl_listener *listener, void *data)
+{
+  MetaWaylandKeyboard *keyboard =
+    wl_container_of (listener, keyboard, focus_listener);
+
+  keyboard->focus_resource = NULL;
+  keyboard->focus = NULL;
+}
+
 static gboolean
 default_grab_key (MetaWaylandKeyboardGrab *grab,
                   uint32_t time, uint32_t key, uint32_t state)
@@ -330,6 +340,7 @@ meta_wayland_keyboard_init (MetaWaylandKeyboard *keyboard,
 
   wl_list_init (&keyboard->resource_list);
   wl_array_init (&keyboard->keys);
+  keyboard->focus_listener.notify = lose_keyboard_focus;
   keyboard->default_grab.interface = &default_keyboard_grab_interface;
   keyboard->default_grab.keyboard = keyboard;
   keyboard->grab = &keyboard->default_grab;
@@ -511,6 +522,7 @@ meta_wayland_keyboard_set_focus (MetaWaylandKeyboard *keyboard,
       struct wl_display *display = wl_client_get_display (client);
       serial = wl_display_next_serial (display);
       wl_keyboard_send_leave (resource, serial, keyboard->focus->resource);
+      wl_list_remove (&keyboard->focus_listener.link);
 
       meta_wayland_surface_focused_unset (keyboard->focus);
     }
@@ -545,6 +557,7 @@ meta_wayland_keyboard_set_focus (MetaWaylandKeyboard *keyboard,
          wl_keyboard_send_enter (resource, serial, surface->resource,
                                  &keyboard->keys);
        }
+      wl_resource_add_destroy_listener (resource, &keyboard->focus_listener);
       keyboard->focus_serial = serial;
 
       meta_wayland_surface_focused_set (surface);
@@ -575,6 +588,10 @@ meta_wayland_keyboard_release (MetaWaylandKeyboard *keyboard)
 {
   meta_wayland_xkb_info_destroy (&keyboard->xkb_info);
   xkb_context_unref (keyboard->xkb_context);
+
+  /* XXX: What about keyboard->resource_list? */
+  if (keyboard->focus_resource)
+    wl_list_remove (&keyboard->focus_listener.link);
   wl_array_release (&keyboard->keys);
 }
 
diff --git a/src/wayland/meta-wayland-keyboard.h b/src/wayland/meta-wayland-keyboard.h
index f0a793c..4354faf 100644
--- a/src/wayland/meta-wayland-keyboard.h
+++ b/src/wayland/meta-wayland-keyboard.h
@@ -94,6 +94,7 @@ struct _MetaWaylandKeyboard
   struct wl_list resource_list;
   MetaWaylandSurface *focus;
   struct wl_resource *focus_resource;
+  struct wl_listener focus_listener;
   uint32_t focus_serial;
 
   MetaWaylandKeyboardGrab *grab;