public void Append(string str, StateHistory history)
{
undoStack.Push(history);
OnAppend?.Invoke(str);
if (history.PushState != null)
{
PushState(history.PushState);
}
InputField.text += str;
DisableInvalidButtons();
}
public void Undo()
{
if (undoStack.Count > 0)
{
string currentExp = InputField.text;
StateHistory popped = undoStack.Pop();
InputField.text = string.Join("", undoStack.Reverse().Select(s => s.ExpressionPart));
OnUndo?.Invoke(currentExp.Substring(InputField.text.Length));
if (popped.PushState != null)
{
PopState(true);
}
if (popped.PopState != null)
{
PushState(popped.PopState);
}
DisableInvalidButtons();
SetDebugText();
}
}
