/// <summary>
/// Создает описание обратного действия
/// </summary>
/// <param name="unit"></param>
/// <returns></returns>
private UndoUnit CreateReverseUndoAction(UndoUnit unit)
{
UndoUnit result = new UndoUnit();
if (unit.Kind == ActionKind.Add)
{
result.Kind = ActionKind.Remove;
result.OriginalPointRef = unit.OriginalPointRef;
result.OriginalParent = unit.OriginalParent;
result.OriginalPosition = unit.OriginalParent.Items.IndexOf(unit.OriginalPointRef);
}
else if (unit.Kind == ActionKind.Remove)
{
result.Kind = ActionKind.Add;
result.OriginalPointRef = unit.OriginalPointRef;
result.OriginalParent = unit.OriginalParent;
result.OriginalPosition = unit.OriginalPosition;
}
else if (unit.Kind == ActionKind.Move)
{
result.Kind = ActionKind.Move;
result.OriginalPointRef = unit.OriginalPointRef;
result.OriginalParent = unit.OriginalPointContent;
result.OriginalPointContent = unit.OriginalParent;
result.OriginalPosition = unit.OriginalPointContent.Items.IndexOf(unit.OriginalPointRef);
}
else //if (result.Kind == ActionKind.Edit)
{
result.Kind = ActionKind.Edit;
result.OriginalPointRef = unit.OriginalPointRef;
result.OriginalPointContent = unit.OriginalPointRef.ClonePointAssignItems();
}
return(result);
}
/// <summary>
/// Создает описание обратного действия
/// </summary>
/// <param name="unit"></param>
/// <returns></returns>
private UndoUnit CreateReverseUndoAction(UndoUnit unit)
{
UndoUnit result = new UndoUnit();
if (unit.Kind == ActionKind.Add)
{
result.Kind = ActionKind.Remove;
result.OriginalPointRef = unit.OriginalPointRef;
result.OriginalParent = unit.OriginalParent;
result.OriginalPosition = unit.OriginalParent.Items.IndexOf(unit.OriginalPointRef);
}
else if (unit.Kind == ActionKind.Remove)
{
result.Kind = ActionKind.Add;
result.OriginalPointRef = unit.OriginalPointRef;
result.OriginalParent = unit.OriginalParent;
result.OriginalPosition = unit.OriginalPosition;
}
else if (unit.Kind == ActionKind.Move)
{
result.Kind = ActionKind.Move;
result.OriginalPointRef = unit.OriginalPointRef;
result.OriginalParent = unit.OriginalPointContent;
result.OriginalPointContent = unit.OriginalParent;
result.OriginalPosition = unit.OriginalPointContent.Items.IndexOf(unit.OriginalPointRef);
}
else //if (result.Kind == ActionKind.Edit)
{
result.Kind = ActionKind.Edit;
result.OriginalPointRef = unit.OriginalPointRef;
result.OriginalPointContent = unit.OriginalPointRef.ClonePointAssignItems();
}
return result;
}
public void Redo()
{
UndoUnit redo = undoEngine.Redo();
if (redo == null)
{
return;
}
ApplyUndoUnit(redo);
}
public void Undo()
{
UndoUnit undo = undoEngine.Undo();
if (undo == null)
{
return;
}
ApplyUndoUnit(undo);
}
/// <summary>
/// Возвращает описание повторяемого действия, попутно сохраняя состояние точки для возможной отмены действия
/// </summary>
/// <returns></returns>
public UndoUnit Redo()
{
if (RedoStack.Count == 0)
{
return(null);
}
UndoUnit result = RedoStack.Pop();
UndoStack.Push(CreateReverseUndoAction(result));
return(result);
}
/// <summary>
/// Создавет экземпляр UndoAction по нынешнему состоянию точки
/// При kind == move, параметр newParent обязателен
/// </summary>
/// <param name="point">Исходная точка</param>
/// <param name="parent">Исходный родитель точки</param>
/// <param name="kind">Тип действия</param>
private UndoUnit CreateUndoUnit(PointOfInterest point, PointOfInterest parent, ActionKind kind, PointOfInterest newParent = null)
{
if (kind == ActionKind.Move && newParent == null)
throw new ArgumentException();
UndoUnit undo = new UndoUnit();
undo.Kind = kind;
undo.OriginalParent = parent;
undo.OriginalPosition = parent == null ? 0 : parent.Items.IndexOf(point);
undo.OriginalPointRef = point;
if (kind == ActionKind.Edit)
undo.OriginalPointContent = point.ClonePointAssignItems();
if (kind == ActionKind.Move)
undo.OriginalPointContent = newParent;
return undo;
}
private void ApplyUndoUnit(UndoUnit action)
{
if (action.Kind == ActionKind.Add)
{
//Добавляли, нужно удалить
TreeNode node = FindNodeByValue(action.OriginalPointRef);
action.OriginalParent.Items.Remove(action.OriginalPointRef);
removeNodeFromDictionary(node);
node.Remove();
}
else if (action.Kind == ActionKind.Remove)
{
//Удаляли, нужно добавить
TreeNode parentNode = FindNodeByValue(action.OriginalParent);
action.OriginalParent.Items.Insert(action.OriginalPosition, action.OriginalPointRef);
TreeNode newNode = ConvertPointToTree(action.OriginalPointRef);
if (parentNode == null)
{
treeView.Nodes.Insert(action.OriginalPosition, newNode);
}
else
{
parentNode.Nodes.Insert(action.OriginalPosition, newNode);
}
}
else if (action.Kind == ActionKind.Move)
{
//Перемещали
TreeNode node = FindNodeByValue(action.OriginalPointRef);
TreeNodeCollection oldCol = node.Parent == null ? treeView.Nodes : node.Parent.Nodes;
TreeNode newParent = FindNodeByValue(action.OriginalParent);
TreeNodeCollection newCol = newParent == null ? treeView.Nodes : newParent.Nodes;
oldCol.Remove(node);
newCol.Insert(action.OriginalPosition, node);
action.OriginalPointContent.Items.Remove(action.OriginalPointRef);
action.OriginalParent.Items.Insert(action.OriginalPosition, action.OriginalPointRef);
}
else if (action.Kind == ActionKind.Edit)
{
//Редактировали
TreeNode node = FindNodeByValue(action.OriginalPointRef);
action.OriginalPointRef.ApplyChanges(action.OriginalPointContent);
node.Text = action.OriginalPointRef.Title;
node.ToolTipText = action.OriginalPointRef.Note;
}
manager.isFileSaved = false;
}
/// <summary>
/// Создавет экземпляр UndoAction по нынешнему состоянию точки
/// При kind == move, параметр newParent обязателен
/// </summary>
/// <param name="point">Исходная точка</param>
/// <param name="parent">Исходный родитель точки</param>
/// <param name="kind">Тип действия</param>
private UndoUnit CreateUndoUnit(PointOfInterest point, PointOfInterest parent, ActionKind kind, PointOfInterest newParent = null)
{
if (kind == ActionKind.Move && newParent == null)
{
throw new ArgumentException();
}
UndoUnit undo = new UndoUnit();
undo.Kind = kind;
undo.OriginalParent = parent;
undo.OriginalPosition = parent == null ? 0 : parent.Items.IndexOf(point);
undo.OriginalPointRef = point;
if (kind == ActionKind.Edit)
{
undo.OriginalPointContent = point.ClonePointAssignItems();
}
if (kind == ActionKind.Move)
{
undo.OriginalPointContent = newParent;
}
return(undo);
}
private void ApplyUndoUnit(UndoUnit action)
{
if (action.Kind == ActionKind.Add)
{
//Добавляли, нужно удалить
TreeNode node = FindNodeByValue(action.OriginalPointRef);
action.OriginalParent.Items.Remove(action.OriginalPointRef);
removeNodeFromDictionary(node);
node.Remove();
}
else if (action.Kind == ActionKind.Remove)
{
//Удаляли, нужно добавить
TreeNode parentNode = FindNodeByValue(action.OriginalParent);
action.OriginalParent.Items.Insert(action.OriginalPosition, action.OriginalPointRef);
TreeNode newNode = ConvertPointToTree(action.OriginalPointRef);
if (parentNode == null)
treeView.Nodes.Insert(action.OriginalPosition, newNode);
else
parentNode.Nodes.Insert(action.OriginalPosition, newNode);
}
else if (action.Kind == ActionKind.Move)
{
//Перемещали
TreeNode node = FindNodeByValue(action.OriginalPointRef);
TreeNodeCollection oldCol = node.Parent == null ? treeView.Nodes : node.Parent.Nodes;
TreeNode newParent = FindNodeByValue(action.OriginalParent);
TreeNodeCollection newCol = newParent == null ? treeView.Nodes : newParent.Nodes;
oldCol.Remove(node);
newCol.Insert(action.OriginalPosition, node);
action.OriginalPointContent.Items.Remove(action.OriginalPointRef);
action.OriginalParent.Items.Insert(action.OriginalPosition, action.OriginalPointRef);
}
else if (action.Kind == ActionKind.Edit)
{
//Редактировали
TreeNode node = FindNodeByValue(action.OriginalPointRef);
action.OriginalPointRef.ApplyChanges(action.OriginalPointContent);
node.Text = action.OriginalPointRef.Title;
node.ToolTipText = action.OriginalPointRef.Note;
}
manager.isFileSaved = false;
}