precalculate_sizes: round sizes instead of flooring them

This will lead to more accurate and consistent container sizes.

Needed to fix the failing test of #3240.

diff --git a/src/render.c b/src/render.c
index 0125b89d683a42346edaa179e902edba3affb447..8699660edd470934fe19a62bab841e93cc6b35c0 100644 (file)
--- a/src/render.c
+++ b/src/render.c
@@ -192,7 +192,7 @@ static int *precalculate_sizes(Con *con, render_params *p) {
         int total = con_orientation(con) == HORIZ ? p->rect.width : p->rect.height;
         TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
             double percentage = child->percent > 0.0 ? child->percent : 1.0 / p->children;
-            assigned += sizes[i++] = percentage * total;
+            assigned += sizes[i++] = lround(percentage * total);
         }
         assert(assigned == total ||
                (assigned > total && assigned - total <= p->children * 2) ||