UndoState

fun clearHistory(): Unit

Clears all undo and redo history up to this point.

fun redo(): Unit

Re-applies a change that was previously reverted via undo.

fun undo(): Unit

Reverts the latest edit action or a group of actions that are merged together. Calling it repeatedly can continue undoing the previous actions.

val canRedo: Boolean

Whether it is possible to execute a meaningful redo action right now. If this value is false, calling redo would be a no-op.

val canUndo: Boolean

Whether it is possible to execute a meaningful undo action right now. If this value is false, calling undo would be a no-op.