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, 11 insertions, 0 deletions

diff --git a/sway/desktop/output.c b/sway/desktop/output.c
index cfb5a710..0bcdcac1 100644
--- a/sway/desktop/output.c
+++ b/sway/desktop/output.c
@@ -329,6 +329,17 @@ static void send_frame_done(struct sway_output *output, struct timespec *when) {
                                 workspace->current.fullscreen, &data);
                 container_for_each_child(workspace->current.fullscreen,
                                 send_frame_done_container_iterator, &data);
+                if (config->popup_during_fullscreen == POPUP_SMART &&
+                                workspace->current.fullscreen->view) {
+                        for (int i = 0; i < workspace->current.floating->length; ++i) {
+                                struct sway_container *floater =
+                                        workspace->current.floating->items[i];
+                                if (floater->view && view_is_transient_for(floater->view,
+                                                        workspace->current.fullscreen->view)) {
+                                        send_frame_done_container_iterator(floater, &data);
+                                }
+                        }
+                }
 #ifdef HAVE_XWAYLAND
                 send_frame_done_unmanaged(output, &root->xwayland_unmanaged, when);
 #endif