Implement popup_during_fullscreen

This introduces a new view_impl function: is_transient_for. Similar to
container_has_ancestor but works using the surface parents rather than
the tree.

This patch modifies view_is_visible, container_at and so on to allow
transient views to function normally when they're in front of a
fullscreen view.

1 files changed, 1 insertions, 0 deletions

diff --git a/sway/config.c b/sway/config.c
index 8f8ed438..070b15c8 100644
--- a/sway/config.c
+++ b/sway/config.c
@@ -212,6 +212,7 @@ static void config_defaults(struct sway_config *config) {
         if (!(config->font = strdup("monospace 10"))) goto cleanup;
         config->font_height = 17; // height of monospace 10
         config->urgent_timeout = 500;
+        config->popup_during_fullscreen = POPUP_SMART;
 
         // floating view
         config->floating_maximum_width = 0;