Adjust focus order to match rendering order of layer shell popups.

sway/input/cursor.c

@@ -52,6 +52,30 @@ static struct wlr_surface *layer_surface_at(struct sway_output *output,
 	return NULL;
 }
 
+static bool surface_is_xdg_popup(struct wlr_surface *surface) {
+    if (wlr_surface_is_xdg_surface(surface)) {
+        struct wlr_xdg_surface *xdg_surface =
+            wlr_xdg_surface_from_wlr_surface(surface);
+        return xdg_surface->role == WLR_XDG_SURFACE_ROLE_POPUP;
+    }
+    return false;
+}
+
+static struct wlr_surface *layer_surface_popup_at(struct sway_output *output,
+		struct wl_list *layer, double ox, double oy, double *sx, double *sy) {
+	struct sway_layer_surface *sway_layer;
+	wl_list_for_each_reverse(sway_layer, layer, link) {
+		double _sx = ox - sway_layer->geo.x;
+		double _sy = oy - sway_layer->geo.y;
+		struct wlr_surface *sub = wlr_layer_surface_v1_surface_at(
+			sway_layer->layer_surface, _sx, _sy, sx, sy);
+		if (sub && surface_is_xdg_popup(sub)) {
+			return sub;
+		}
+	}
+	return NULL;
+}
+
 /**
  * Returns the node at the cursor's position. If there is a surface at that
  * location, it is stored in **surface (it may not be a view).
@@ -132,6 +156,21 @@ struct sway_node *node_at_coords(
 		}
 		return NULL;
 	}
+	if ((*surface = layer_surface_popup_at(output,
+				&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_TOP],
+				ox, oy, sx, sy))) {
+		return NULL;
+	}
+	if ((*surface = layer_surface_popup_at(output,
+				&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM],
+				ox, oy, sx, sy))) {
+		return NULL;
+	}
+	if ((*surface = layer_surface_popup_at(output,
+				&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND],
+				ox, oy, sx, sy))) {
+		return NULL;
+	}
 	if ((*surface = layer_surface_at(output,
 				&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_TOP],
 				ox, oy, sx, sy))) {