xdg-popup: render popups in the right place

include/wlr/types/wlr_xdg_shell_v6.h

@@ -89,6 +89,9 @@ struct wlr_xdg_surface_v6 {
 		struct wlr_xdg_popup_v6 *popup_state;
 	};
 
+	struct wl_list popups;
+	struct wl_list popup_link;
+
 	bool configured;
 	struct wl_event_source *configure_idle;
 	struct wl_list configure_list;

rootston/output.c

@@ -53,10 +53,33 @@ static void render_surface(struct wlr_surface *surface,
 	}
 }
 
+static void render_xdg_v6_popups(struct wlr_xdg_surface_v6 *surface,
+		struct roots_desktop *desktop, struct wlr_output *wlr_output,
+		struct timespec *when, double base_x, double base_y) {
+	struct wlr_xdg_surface_v6 *popup;
+	wl_list_for_each(popup, &surface->popups, popup_link) {
+		if (!popup->configured) {
+			continue;
+		}
+
+		double popup_x = base_x + surface->geometry->x +
+			popup->popup_state->geometry.x - popup->geometry->x;
+		double popup_y = base_y + surface->geometry->y +
+			popup->popup_state->geometry.y - popup->geometry->y;
+		render_surface(popup->surface, desktop, wlr_output, when, popup_x,
+			popup_y);
+		render_xdg_v6_popups(popup, desktop, wlr_output, when, popup_x, popup_y);
+	}
+}
+
 static void render_view(struct roots_view *view, struct roots_desktop *desktop,
 		struct wlr_output *wlr_output, struct timespec *when) {
 	render_surface(view->wlr_surface, desktop, wlr_output, when,
 		view->x, view->y);
+	if (view->type == ROOTS_XDG_SHELL_V6_VIEW) {
+		render_xdg_v6_popups(view->xdg_surface_v6, desktop, wlr_output,
+			when, view->x, view->y);
+	}
 }
 
 static void output_frame_notify(struct wl_listener *listener, void *data) {

rootston/xdg_shell_v6.c

@@ -73,11 +73,18 @@ static void handle_destroy(struct wl_listener *listener, void *data) {
 }
 
 void handle_xdg_shell_v6_surface(struct wl_listener *listener, void *data) {
+	struct wlr_xdg_surface_v6 *surface = data;
+	assert(surface->role != WLR_XDG_SURFACE_V6_ROLE_NONE);
+
+	if (surface->role == WLR_XDG_SURFACE_V6_ROLE_POPUP) {
+		wlr_log(L_DEBUG, "new xdg popup");
+		return;
+	}
+
 	struct roots_desktop *desktop =
 		wl_container_of(listener, desktop, xdg_shell_v6_surface);
 
-	struct wlr_xdg_surface_v6 *surface = data;
-	wlr_log(L_DEBUG, "new xdg surface: title=%s, app_id=%s",
+	wlr_log(L_DEBUG, "new xdg toplevel: title=%s, app_id=%s",
 		surface->title, surface->app_id);
 	wlr_xdg_surface_v6_ping(surface);
 

types/wlr_xdg_shell_v6.c

@@ -57,6 +57,7 @@ static void xdg_surface_destroy(struct wlr_xdg_surface_v6 *surface) {
 
 	if (surface->role == WLR_XDG_SURFACE_V6_ROLE_POPUP) {
 		wl_resource_set_user_data(surface->popup_state->resource, NULL);
+		wl_list_remove(&surface->popup_link);
 		free(surface->popup_state);
 	}
 
@@ -317,6 +318,8 @@ static void xdg_surface_get_popup(struct wl_client *client,
 	surface->popup_state->parent = parent;
 	surface->popup_state->geometry =
 		xdg_positioner_get_geometry(positioner, surface, parent);
+	wl_list_insert(&surface->popup_state->parent->popups,
+		&surface->popup_link);
 
 	wl_resource_set_implementation(surface->popup_state->resource,
 		&zxdg_popup_v6_implementation, surface,
@@ -914,6 +917,7 @@ static void xdg_shell_get_xdg_surface(struct wl_client *wl_client,
 	}
 
 	wl_list_init(&surface->configure_list);
+	wl_list_init(&surface->popups);
 
 	wl_signal_init(&surface->events.request_minimize);
 	wl_signal_init(&surface->events.request_move);