focus: beyond fullscreen when focused explicitly

When issuing a focus command on a specific container, users expect to
proceed it even if is hidden by a fullscreen window.

This matches the behavior of i3.

1 files changed, 22 insertions, 0 deletions

diff --git a/sway/tree/container.c b/sway/tree/container.c
index 6b4c6de2..e22c5961 100644
--- a/sway/tree/container.c
+++ b/sway/tree/container.c
@@ -418,6 +418,28 @@ void container_for_each_child(struct sway_container *container,
         }
 }
 
+struct sway_container *container_obstructing_fullscreen_container(struct sway_container *container)
+{
+        struct sway_workspace *workspace = container->pending.workspace;
+
+        if (workspace && workspace->fullscreen && !container_is_fullscreen_or_child(container)) {
+                if (container_is_transient_for(container, workspace->fullscreen)) {
+                        return NULL;
+                }
+                return workspace->fullscreen;
+        }
+
+        struct sway_container *fullscreen_global = root->fullscreen_global;
+        if (fullscreen_global && container != fullscreen_global && !container_has_ancestor(container, fullscreen_global)) {
+                if (container_is_transient_for(container, fullscreen_global)) {
+                        return NULL;
+                }
+                return fullscreen_global;
+        }
+
+        return NULL;
+}
+
 bool container_has_ancestor(struct sway_container *descendant,
                 struct sway_container *ancestor) {
         while (descendant) {