public override bool CanMerge(DocumentUndoAction action)
{
if (!(action is UndoMyEditAction))
return false;
var action_casted = (UndoMyEditAction)action;
if (!(action_casted.__UndoAction is UndoTextEnter))
return false;
return __UndoAction.CanBeMergedWith((UndoTextEnter)(action_casted.__UndoAction));
}
public override bool CanMerge(DocumentUndoAction action)
{
if (!(action is UndoMyEditAction))
{
return(false);
}
var action_casted = (UndoMyEditAction)action;
if (!(action_casted.__UndoAction is UndoTextEnter))
{
return(false);
}
return(__UndoAction.CanBeMergedWith((UndoTextEnter)(action_casted.__UndoAction)));
}
public override void Merge(DocumentUndoAction action)
{
Debug.Assert(action is UndoMyEditAction);
Debug.Assert(((UndoMyEditAction)action).__UndoAction is UndoTextEnter);
__UndoAction.Merge((UndoTextEnter)(((UndoMyEditAction)action).__UndoAction));
}
public void Add(DocumentUndoAction action)
{
__UndoActions.Add(action);
}
public override void Merge(DocumentUndoAction action)
{
Debug.Assert(action is UndoMyEditAction);
Debug.Assert(((UndoMyEditAction)action).__UndoAction is UndoTextEnter);
__UndoAction.Merge((UndoTextEnter)(((UndoMyEditAction)action).__UndoAction));
}
public void SaveUndoActionStack(DocumentUndoAction undoAction)
{
/*
var ser = new DataContractSerializer(typeof(DocumentUndoAction));
using (XmlWriter xw = XmlWriter.Create(Console.Out))
{
ser.WriteObject(xw, undoAction);
}*/
}
public void PushUndoAction(DocumentUndoAction action)
{
// if the action is empty (does not modifies the docuement, skip adding it to the stack
if (action.IsEmptyAction())
return;
SaveUndoActionStack(action);
if (__UndoActions.Count == 0 || !CanMerge)
{
if (__UndoGroup != null)
__UndoGroup.Add(action);
else
__UndoActions.Push(action);
}
else
{
DocumentUndoAction lastAction = __UndoActions.Peek();
if (lastAction.CanMerge(action))
lastAction.Merge(action);
else
{
if (__UndoGroup != null)
__UndoGroup.Add(action);
else
__UndoActions.Push(action);
}
}
CanMerge = true;
__RedoActions.Clear();
DoUndoCountChanged();
}
public virtual void Merge(DocumentUndoAction action)
{
}
public virtual bool CanMerge(DocumentUndoAction action)
{
return false;
}
public virtual void Merge(DocumentUndoAction action)
{
}
public virtual bool CanMerge(DocumentUndoAction action)
{
return(false);
}
public void Add(DocumentUndoAction action)
{
__UndoActions.Add(action);
}
