+/// Calls saveSelection.
+void eraseSelection(Cursor & cur);
+/// Reduce the selected text in mathed to only one cell. If it spans multiple
+/// cells, the cursor is moved the end of the current cell and the anchor to the
+/// start. If the selection is inside only one cell, nothing is done. Return
+/// true if the selection now does not span multiple cells anymore.
+bool reduceSelectionToOneCell(Cursor & cur);
+/// Returns true if multiple cells are selected in mathed.
+bool multipleCellsSelected(Cursor const & cur);