Begin a not undoable action on the buffer. All changes between this call and the call to gtksource.undo_manager.UndoManager.endNotUndoableAction cannot be undone. This function should be re-entrant.
Get whether there are redo operations available.
Emits the #GtkSourceUndoManager::can-redo-changed signal.
Get whether there are undo operations available.
Emits the #GtkSourceUndoManager::can-undo-changed signal.
Connect to CanRedoChanged signal.
Connect to CanUndoChanged signal.
Ends a not undoable action on the buffer.
Perform a single redo. Calling this function when there are no redo operations available is an error. Use gtksource.undo_manager.UndoManager.canRedo to find out if there are redo operations available.
Perform a single undo. Calling this function when there are no undo operations available is an error. Use gtksource.undo_manager.UndoManager.canUndo to find out if there are undo operations available.