add --i3 flag to hide_edge_borders

Enables i3-compatible behavior regarding hiding the title bar on tabbed and
stacked containers with one child.

Related issues and merge requests: #3031, #3002, #2912, #2987.

1 files changed, 8 insertions, 0 deletions

diff --git a/sway/desktop/render.c b/sway/desktop/render.c
index 92e623ef..5df16075 100644
--- a/sway/desktop/render.c
+++ b/sway/desktop/render.c
@@ -841,6 +841,14 @@ static void render_containers_stacked(struct sway_output *output,
 
 static void render_containers(struct sway_output *output,
                 pixman_region32_t *damage, struct parent_data *parent) {
+        if (config->hide_lone_tab && parent->children->length == 1) {
+                struct sway_container *child = parent->children->items[0];
+                if (child->view) {
+                        render_containers_linear(output,damage, parent);
+                        return;
+                }
+        }
+
         switch (parent->layout) {
         case L_NONE:
         case L_HORIZ: