void Core.IUndoableObject.UndoChanges(int parentEditLevel, bool parentBindingEdit)
{
if (EditLevel > 0)
{
if (this.EditLevel - 1 != parentEditLevel)
{
throw new UndoException(string.Format(Resources.EditLevelMismatchException, "UndoChanges"), this.GetType().Name, _parent != null ? _parent.GetType().Name : null, this.EditLevel, parentEditLevel + 1);
}
#if (ANDROID || IOS) || NETFX_CORE || NETSTANDARD2_0
SerializationInfo state = _stateStack.Pop();
OnSetState(state, StateMode.Undo);
for (var index = 0; index < _fieldData.Length; index++)
{
var item = _fieldData[index];
if (item != null)
{
// potential child object
var child = item.Value as IUndoableObject;
if (child != null)
{
child.UndoChanges(parentEditLevel, parentBindingEdit);
}
}
}
#else
IFieldData[] state = null;
using (MemoryStream buffer = new MemoryStream(_stateStack.Pop()))
{
buffer.Position = 0;
var formatter = SerializationFormatterFactory.GetNativeFormatter();
state = (IFieldData[])(formatter.Deserialize(buffer));
}
for (var index = 0; index < _fieldData.Length; index++)
{
var oldItem = state[index];
var item = _fieldData[index];
if (item != null)
{
var undoable = item.Value as IUndoableObject;
if (undoable != null)
{
// current value is undoable
if (oldItem != null)
{
undoable.UndoChanges(parentEditLevel, parentBindingEdit);
}
else
{
_fieldData[index] = null;
}
continue;
}
}
// restore IFieldData object into field collection
_fieldData[index] = oldItem;
}
#endif
}
}
void Core.IUndoableObject.CopyState(int parentEditLevel, bool parentBindingEdit)
{
if (this.EditLevel + 1 > parentEditLevel)
{
throw new UndoException(string.Format(Resources.EditLevelMismatchException, "CopyState"), this.GetType().Name, _parent != null ? _parent.GetType().Name : null, this.EditLevel, parentEditLevel - 1);
}
#if (ANDROID || IOS) || NETFX_CORE || NETSTANDARD2_0
SerializationInfo state = new SerializationInfo(0);
OnGetState(state, StateMode.Undo);
// This is used instead of a foreach because of some weird silverlight bug
// throwing an unknown exception from a foreach here.
for (var index = 0; index < _fieldData.Length; index++)
{
var item = _fieldData[index];
if (item != null)
{
var child = item.Value as IUndoableObject;
if (child != null)
{
// cascade call to child
child.CopyState(parentEditLevel, parentBindingEdit);
}
}
}
_stateStack.Push(state);
#else
IFieldData[] state = new IFieldData[_propertyList.Count];
for (var index = 0; index < _fieldData.Length; index++)
{
var item = _fieldData[index];
if (item != null)
{
var child = item.Value as IUndoableObject;
if (child != null)
{
// cascade call to child
child.CopyState(parentEditLevel, parentBindingEdit);
// indicate that there was a value here
state[index] = new FieldData <bool>(item.Name);
}
else
{
// add the IFieldData object
state[index] = item;
}
}
}
// serialize the state and stack it
using (MemoryStream buffer = new MemoryStream())
{
var formatter = SerializationFormatterFactory.GetNativeFormatter();
formatter.Serialize(buffer, state);
_stateStack.Push(buffer.ToArray());
}
#endif
}
