buildIndexFromContext method
Implementation
_Slot? buildIndexFromContext(BuildContext context) {
if (context is! Element) return null;
_Slot? slot;
if (context.slot is! _Slot) {
context.visitAncestorElements((element) {
if (element is AnimatedSliverMultiBoxAdaptorElement) return false;
if (element.slot is _Slot) {
slot = element.slot as _Slot;
return false;
}
return true;
});
if (slot == null || slot is! _Slot) return null;
} else {
slot = context.slot as _Slot;
}
assert(() {
AnimatedSliverMultiBoxAdaptorElement? e;
context.visitAncestorElements((element) {
if (element is AnimatedSliverMultiBoxAdaptorElement) {
e = element;
return false;
}
return true;
});
return e != null && e == this;
}());
return slot;
}