xdg-shell: implement popup repositioning

include/sway/tree/view.h

@@ -192,6 +192,7 @@ struct sway_xdg_popup {
 
 	struct wl_listener surface_commit;
 	struct wl_listener new_popup;
+	struct wl_listener reposition;
 	struct wl_listener destroy;
 };
 

sway/desktop/xdg_shell.c

@@ -35,6 +35,7 @@ static void popup_handle_destroy(struct wl_listener *listener, void *data) {
 	wl_list_remove(&popup->new_popup.link);
 	wl_list_remove(&popup->destroy.link);
 	wl_list_remove(&popup->surface_commit.link);
+	wl_list_remove(&popup->reposition.link);
 	wlr_scene_node_destroy(&popup->scene_tree->node);
 	free(popup);
 }
@@ -70,6 +71,11 @@ static void popup_handle_surface_commit(struct wl_listener *listener, void *data
 	}
 }
 
+static void popup_handle_reposition(struct wl_listener *listener, void *data) {
+	struct sway_xdg_popup *popup = wl_container_of(listener, popup, reposition);
+	popup_unconstrain(popup);
+}
+
 static struct sway_xdg_popup *popup_create(struct wlr_xdg_popup *wlr_popup,
 		struct sway_view *view, struct wlr_scene_tree *parent) {
 	struct wlr_xdg_surface *xdg_surface = wlr_popup->base;
@@ -116,6 +122,8 @@ static struct sway_xdg_popup *popup_create(struct wlr_xdg_popup *wlr_popup,
 	popup->surface_commit.notify = popup_handle_surface_commit;
 	wl_signal_add(&xdg_surface->events.new_popup, &popup->new_popup);
 	popup->new_popup.notify = popup_handle_new_popup;
+	wl_signal_add(&wlr_popup->events.reposition, &popup->reposition);
+	popup->reposition.notify = popup_handle_reposition;
 	wl_signal_add(&wlr_popup->events.destroy, &popup->destroy);
 	popup->destroy.notify = popup_handle_destroy;
 

sway/server.c

@@ -65,7 +65,7 @@
 #include <wlr/types/wlr_drm_lease_v1.h>
 #endif
 
-#define SWAY_XDG_SHELL_VERSION 2
+#define SWAY_XDG_SHELL_VERSION 3
 #define SWAY_LAYER_SHELL_VERSION 4
 #define SWAY_FOREIGN_TOPLEVEL_LIST_VERSION 1