internal void AddHistoryPoint(JournalEntry journalEntry)
{
Requires.NotNull(journalEntry, "journalEntry");
_forwardStack.Clear();
if (_currentEntry != null)
{
_backStack.Push(_currentEntry);
}
_currentEntry = journalEntry;
UpdateObservables(_currentEntry, NavigationMode.New);
UpdateNavigationState(_currentEntry);
}
private void UpdateNavigationState(JournalEntry journalEntry)
{
if (UseNavigationState && !_suppressNavigationEvent)
{
Application.Current.Host.NavigationState = journalEntry.Url;
if (HtmlPage.IsEnabled)
{
HtmlPage.Document.SetProperty("title", journalEntry.Name);
}
}
}
private void UpdateObservables(JournalEntry journalEntry, NavigationMode mode)
{
OnNavigated(journalEntry.Name, journalEntry.Url, mode);
}
internal void GoForward()
{
if (!CanGoForward)
{
throw new InvalidOperationException("Cannot GoForward");
}
_backStack.Push(_currentEntry);
_currentEntry = _forwardStack.Pop();
UpdateObservables(_currentEntry, NavigationMode.Forward);
UpdateNavigationState(_currentEntry);
}