/**
* Returns the the next significant edit to be undone if undo is
* called. May return null
*/
protected IUndoableEdit EditToBeUndone()
{
int i = indexOfNextAdd;
while (i > 0)
{
IUndoableEdit edit = edits[--i];
if (edit.isSignificant())
{
return(edit);
}
}
return(null);
}
/**
* Returns the the next significant edit to be redone if redo is
* called. May return null.
* <b>Changes:</b> it return the last insignificant <code>Undoable</code> object, so
* the <code>redo</code> method redo all <code>Undoable</code> objects up to <code>EditToBeRedone</code>.
*/
protected IUndoableEdit EditToBeRedone()
{
int count = edits.Count;
int i = indexOfNextAdd;
while (i < count)
{
IUndoableEdit edit = edits[i++];
if (i >= count)
{
return(edit);
}
IUndoableEdit nextEdit = edits[i];
if (nextEdit.isSignificant())
{
return(edit);
}
}
return(null);
}