[PATCH wayland] data-device: notify the compositor about new drag icons

[Ander Conselvan de Oliveira]

Let the compositor use a listener to be notified when a new drag icon
is set up.
---
 src/data-device.c    |    5 +++++
 src/wayland-server.c |    2 ++
 src/wayland-server.h |    1 +
 3 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/src/data-device.c b/src/data-device.c
index 57f31ca..797fdd7 100644
--- a/src/data-device.c
+++ b/src/data-device.c
@@ -300,6 +300,7 @@ data_device_start_drag(struct wl_client *client, struct wl_resource *resource,
 		       struct wl_resource *icon_resource, uint32_t time)
 {
 	struct wl_input_device *device = resource->data;
+	struct wl_listener *listener, *tmp;
 
 	/* FIXME: Check that client has implicit grab on the origin
 	 * surface that matches the given time. */
@@ -318,6 +319,10 @@ data_device_start_drag(struct wl_client *client, struct wl_resource *resource,
 		device->drag_icon_listener.func = destroy_data_device_icon;
 		wl_list_insert(icon_resource->destroy_listener_list.prev,
 			       &device->drag_icon_listener.link);
+
+		wl_list_for_each_safe(listener, tmp,
+				      &device->drag_icon_listener_list, link)
+			listener->func(listener, icon_resource, time);
 	}
 
 	wl_input_device_start_pointer_grab(device, &device->drag_grab, time);
diff --git a/src/wayland-server.c b/src/wayland-server.c
index 899c094..07a3964 100644
--- a/src/wayland-server.c
+++ b/src/wayland-server.c
@@ -533,6 +533,8 @@ wl_input_device_init(struct wl_input_device *device)
 	device->selection_data_source = NULL;
 	wl_list_init(&device->selection_listener_list);
 
+	wl_list_init(&device->drag_icon_listener_list);
+
 	device->x = 100;
 	device->y = 100;
 }
diff --git a/src/wayland-server.h b/src/wayland-server.h
index 4293536..1cddbfc 100644
--- a/src/wayland-server.h
+++ b/src/wayland-server.h
@@ -233,6 +233,7 @@ struct wl_input_device {
 	struct wl_pointer_grab drag_grab;
 	struct wl_surface *drag_surface;
 	struct wl_listener drag_icon_listener;
+	struct wl_list drag_icon_listener_list;
 
 	struct wl_data_source *selection_data_source;
 	struct wl_listener selection_data_source_listener;
-- 
1.7.4.1