/// <summary>
/// Отменить откат до указанной точки
/// </summary>
/// <param name="entry">точка останова отмены отката</param>
public void Forward(MessageViewHistoryEntry entry)
{
var idx = _forwardPath.IndexOf(entry);
if (idx == -1)
{
throw new ArgumentException("Requested entry not found in history", "entry");
}
var movedEntries = ExtractRange(_forwardPath, idx);
if (_currentEntry != null)
{
_backPath.Insert(0, _currentEntry);
}
foreach (var ery in movedEntries)
{
_backPath.Insert(0, ery);
}
_currentEntry = _forwardPath[0];
_forwardPath.RemoveAt(0);
OnMessageNavigate(new MessageNavigateEventArgs(
_currentEntry.MessageId, HistoryNavigationType.Forward));
}
/// <summary>
/// Откатится назад
/// </summary>
public void Back()
{
if (_backPath.Count > 0)
{
if (_currentEntry != null)
_forwardPath.Insert(0, _currentEntry);
_currentEntry = _backPath[0];
_backPath.RemoveAt(0);
OnMessageNavigate(new MessageNavigateEventArgs(
_currentEntry.MessageId, HistoryNavigationType.Back));
}
}
/// <summary>
/// Перейти на новое сообщение
/// </summary>
/// <param name="msgId">идентификатор сообщения</param>
public void Navigate(int msgId)
{
if (_currentEntry != null && _currentEntry.MessageId == msgId)
return;
if (_currentEntry != null)
_backPath.Insert(0, _currentEntry);
_forwardPath.Clear();
var e = new MessageNavigateEventArgs(
msgId, HistoryNavigationType.Navigate);
OnMessageNavigate(e);
_currentEntry = new MessageViewHistoryEntry(msgId, e.MessageSubject);
}
/// <summary>
/// Откатится назад
/// </summary>
public void Back()
{
if (_backPath.Count > 0)
{
if (_currentEntry != null)
{
_forwardPath.Insert(0, _currentEntry);
}
_currentEntry = _backPath[0];
_backPath.RemoveAt(0);
OnMessageNavigate(new MessageNavigateEventArgs(
_currentEntry.MessageId, HistoryNavigationType.Back));
}
}
/// <summary>
/// Перейти на новое сообщение
/// </summary>
/// <param name="msgId">идентификатор сообщения</param>
public void Navigate(int msgId)
{
if (_currentEntry != null && _currentEntry.MessageId == msgId)
{
return;
}
if (_currentEntry != null)
{
_backPath.Insert(0, _currentEntry);
}
_forwardPath.Clear();
var e = new MessageNavigateEventArgs(
msgId, HistoryNavigationType.Navigate);
OnMessageNavigate(e);
_currentEntry = new MessageViewHistoryEntry(msgId, e.MessageSubject);
}
/// <summary>
/// Откатится назад до указанной точки
/// </summary>
/// <param name="entry">точка останова отката</param>
public void Back(MessageViewHistoryEntry entry)
{
var idx = _backPath.IndexOf(entry);
if (idx == -1)
throw new ArgumentException("Requested entry not found in history", "entry");
var movedEntries = ExtractRange(_backPath, idx);
if (_currentEntry != null)
_forwardPath.Insert(0, _currentEntry);
foreach (var ery in movedEntries)
_forwardPath.Insert(0, ery);
_currentEntry = _backPath[0];
_backPath.RemoveAt(0);
OnMessageNavigate(new MessageNavigateEventArgs(
_currentEntry.MessageId, HistoryNavigationType.Back));
}