public void Push(VObjectHostState state)
{
if (_disposed)
{
throw new System.ObjectDisposedException("StatesStack");
}
if (state == null)
{
throw new System.ArgumentNullException("state");
}
if (state.IsEmpty)
{
throw new System.ArgumentException(StringResources.GetString("ExStrObjectCannotBeEmpty"), "state");
}
if (_count < _array.Length)
{
_count++;
}
if (++_index >= _array.Length)
{
_index = 0;
}
if (_array[_index] != null)
{
_array[_index].Dispose();
_array[_index] = null;
}
_array[_index] = state;
}
private void UpdateCurrentState()
{
if (!_undoRedoEnabled)
{
throw new Aurigma.GraphicsMill.UnexpectedException(StringResources.GetString("ExStrUndoRedoShouldBeEnabled"));
}
_currentState = new VObjectHostState();
_vObjectHost.Layers.Serialize(_currentState.Stream);
_currentState.LayerIndex = _vObjectHost.CurrentLayerIndex;
}
private void RestoreState(VObjectHostState state)
{
if (!_undoRedoEnabled)
{
throw new Aurigma.GraphicsMill.UnexpectedException(StringResources.GetString("ExStrUndoRedoShouldBeEnabled"));
}
_restoringState = true;
try
{
_vObjectHost.Layers.Deserialize(state.Stream);
_vObjectHost.CurrentLayerIndex = state.LayerIndex;
}
finally
{
_restoringState = false;
}
}
public VObjectHostState Pop()
{
if (_disposed)
{
throw new System.ObjectDisposedException("StatesStack");
}
if (_count < 1)
{
throw new Aurigma.GraphicsMill.ObjectEmptyException();
}
VObjectHostState result = _array[_index];
System.Diagnostics.Debug.Assert(result != null, "State stack cannot contain null elements!");
_array[_index] = null;
if (--_index < 0)
{
_index = _array.Length - 1;
}
_count--;
return(result);
}
public StateStack(int capacity)
{
_index = -1;
_array = new VObjectHostState[capacity];
}
