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, 14 insertions, 1 deletions

diff --git a/sway/tree/view.c b/sway/tree/view.c
index 73ce55ac..edf771c1 100644
--- a/sway/tree/view.c
+++ b/sway/tree/view.c
@@ -1042,7 +1042,14 @@ bool view_is_visible(struct sway_view *view) {
         // Check view isn't hidden by another fullscreen view
         if (workspace->fullscreen &&
                         !container_is_fullscreen_or_child(view->container)) {
-                return false;
+                // However, if we're transient for the fullscreen view and we allow
+                // "popups" during fullscreen then it might be visible
+                bool is_transient = config->popup_during_fullscreen == POPUP_SMART &&
+                                workspace->fullscreen->view &&
+                                view_is_transient_for(view, workspace->fullscreen->view);
+                if (!is_transient) {
+                        return false;
+                }
         }
         return true;
 }
@@ -1095,3 +1102,9 @@ void view_save_buffer(struct sway_view *view) {
                 view->saved_buffer_height = view->surface->current.height;
         }
 }
+
+bool view_is_transient_for(struct sway_view *child,
+                struct sway_view *ancestor) {
+        return child->impl->is_transient_for &&
+                child->impl->is_transient_for(child, ancestor);
+}