1 files changed, 15 insertions, 0 deletions

diff --git a/sway/tree/container.c b/sway/tree/container.c
index db02c69c..fc35a81c 100644
--- a/sway/tree/container.c
+++ b/sway/tree/container.c
@@ -547,6 +547,21 @@ bool container_has_child(struct sway_container *con,
         return container_find(con, find_child_func, child);
 }
 
+int container_count_descendants_of_type(struct sway_container *con,
+                enum sway_container_type type) {
+        int children = 0;
+        if (con->type == type) {
+                children++;
+        }
+        if (con->children) {
+                for (int i = 0; i < con->children->length; i++) {
+                        struct sway_container *child = con->children->items[i];
+                        children += container_count_descendants_of_type(child, type);
+                }
+        }
+        return children;
+}
+
 void container_damage_whole(struct sway_container *container) {
         for (int i = 0; i < root_container.children->length; ++i) {
                 struct sway_container *cont = root_container.children->items[i];