Pass button clicks through to compositor.

This lets us handle raising windows, which is useful.

egl-compositor.c

@@ -730,6 +730,38 @@ notify_pointer_motion(struct wl_compositor *compositor,
 	schedule_repaint(ec);
 }
 
+static void
+notify_pointer_button(struct wl_compositor *compositor,
+		      struct wl_object *source,
+		      int32_t button, int32_t state)
+{
+	struct egl_compositor *ec = (struct egl_compositor *) compositor;
+	struct egl_surface *es;
+	struct wl_surface_iterator *iterator;
+	struct wl_surface *surface, *target;
+	const int hotspot_x = 16, hotspot_y = 16;
+	int x, y;
+
+	x = ec->pointer->map.x + hotspot_x;
+	y = ec->pointer->map.y + hotspot_y;
+
+	target = NULL;
+	iterator = wl_surface_iterator_create(ec->wl_display, 0);
+	while (wl_surface_iterator_next(iterator, &surface)) {
+		es = wl_surface_get_data(surface);
+		if (es == NULL)
+			continue;
+
+		if (es->map.x <= x && x < es->map.x + es->map.width &&
+		    es->map.y <= y && y < es->map.y + es->map.height)
+			target = surface;
+	}
+	wl_surface_iterator_destroy(iterator);
+
+	if (target)
+		wl_display_raise_surface(ec->wl_display, target);
+}
+
 static void
 notify_key(struct wl_compositor *compositor,
 	   struct wl_object *source, uint32_t key, uint32_t state)
@@ -754,6 +786,7 @@ static const struct wl_compositor_interface interface = {
 	notify_surface_damage,
 	notify_commit,
 	notify_pointer_motion,
+	notify_pointer_button,
 	notify_key
 };
 

wayland.c

@@ -677,8 +677,13 @@ WL_EXPORT void
 wl_display_post_button_event(struct wl_display *display,
 			     struct wl_object *source, int button, int state)
 {
+	const struct wl_compositor_interface *interface;
 	uint32_t p[4];
 
+	interface = display->compositor->interface;
+	interface->notify_pointer_button(display->compositor, source,
+					 button, state);
+
 	p[0] = source->id;
 	p[1] = (sizeof p << 16) | WL_INPUT_BUTTON;
 	p[2] = button;
@@ -833,3 +838,10 @@ wl_surface_iterator_destroy(struct wl_surface_iterator *iterator)
 {
 	free(iterator);
 }
+
+WL_EXPORT void
+wl_display_raise_surface(struct wl_display *display, struct wl_surface *surface)
+{
+	wl_list_remove(&surface->link);
+	wl_list_insert(display->surface_list.prev, &surface->link);
+}

wayland.h

@@ -142,6 +142,8 @@ wl_display_post_key_event(struct wl_display *display,
 void
 wl_display_post_frame(struct wl_display *display,
 		      uint32_t frame, uint32_t msecs);
+void
+wl_display_raise_surface(struct wl_display *display, struct wl_surface *surface);
 
 struct wl_compositor {
 	const struct wl_compositor_interface *interface;
@@ -174,6 +176,9 @@ struct wl_compositor_interface {
 	void (*notify_pointer_motion)(struct wl_compositor *compositor,
 				      struct wl_object *source,
 				      int32_t x, int32_t y);
+	void (*notify_pointer_button)(struct wl_compositor *compositor,
+				      struct wl_object *source,
+				      int32_t button, int32_t state);
 	void (*notify_key)(struct wl_compositor *compositor,
 			   struct wl_object *source,
 			   uint32_t key, uint32_t state);