tree: support formatting null titles

Any windows that have never had a title set visually behave closer to
that of an empty title, but are unformattable, as the code bails out
early on a NULL title.

1 files changed, 7 insertions, 5 deletions

diff --git a/sway/tree/view.c b/sway/tree/view.c
index 7d9e038d..0004ed14 100644
--- a/sway/tree/view.c
+++ b/sway/tree/view.c
@@ -1282,21 +1282,23 @@ void view_update_title(struct sway_view *view, bool force) {
 
         free(view->container->title);
         free(view->container->formatted_title);
-        if (title) {
-                size_t len = parse_title_format(view, NULL);
+
+        size_t len = parse_title_format(view, NULL);
+
+        if (len) {
                 char *buffer = calloc(len + 1, sizeof(char));
                 if (!sway_assert(buffer, "Unable to allocate title string")) {
                         return;
                 }
-                parse_title_format(view, buffer);
 
-                view->container->title = strdup(title);
+                parse_title_format(view, buffer);
                 view->container->formatted_title = buffer;
         } else {
-                view->container->title = NULL;
                 view->container->formatted_title = NULL;
         }
 
+        view->container->title = title ? strdup(title) : NULL;
+
         // Update title after the global font height is updated
         container_update_title_textures(view->container);