currentSelection

Returns the current visible cell selection, or null when nothing is selected. Linear selection columns are logical; block selection columns are visual, as defined by CellSelection.

The returned snapshot is immutable and may be retained. Unchanged values may share an instance; object identity is not part of this API's contract.

This method may be called from any thread. Off-EDT callers wait for the EDT to read the binding, selection, and viewport together. EDT callers read directly.