in src/main/java/idea/plugin/psiviewer/controller/project/PsiViewerEditorListener.java [64:70]
public void selectionChanged(@NotNull FileEditorManagerEvent event) {
var viewerPanel = getViewerPanel();
if (viewerPanel.isToolWindowVisible()) {
debug("selection changed " + event);
viewerPanel.selectElementAtCaret();
}
}