internal void LoadHistoryStream(MemoryStream loadStream, bool firstLoadFromHistory)
{
if (Application.Current == null)
{
return;
}
LoadHistoryStreamInfo info = new LoadHistoryStreamInfo();
info.loadStream = loadStream;
info.firstLoadFromHistory = firstLoadFromHistory;
Application.Current.Dispatcher.Invoke(
DispatcherPriority.Send,
new DispatcherOperationCallback(_LoadHistoryStreamDelegate),
info);
}
private object _LoadHistoryStreamDelegate(object arg)
{
Journal journal = null;
JournalEntry entry = null;
LoadHistoryStreamInfo info = (LoadHistoryStreamInfo)arg;
if (IsShutdown() == true)
{
return(null);
}
// Reset the memory stream pointer back to the begining and get the persisted object
info.loadStream.Seek(0, System.IO.SeekOrigin.Begin);
object journaledObject = DeserializeJournaledObject(info.loadStream);
//This is the very first load from history, so need to set the BaseUri and StartupUri.
if (info.firstLoadFromHistory)
{
// The journal does not get saved on Ctrl+N. Because of this,
// here we can get just an index, like in the 'else' case below.
if (!(journaledObject is BrowserJournal))
{
return(null);
}
BrowserJournal browserJournal = (BrowserJournal)journaledObject;
journal = browserJournal.Journal;
entry = journal.CurrentEntry;
if (entry == null) // See special case in _GetSaveHistoryBytesDelegate().
{
entry = journal.GetGoBackEntry(); // could still be null
}
//This will create the frame to use for hosting
{
NavigationService navigationService = null;
navigationService = _rbw.Value.NavigationService;
}
_rbw.Value.SetJournalForBrowserInterop(journal);
//This should already be set for the container and exe cases. The former
//sets it to the transformed ssres scheme and we don't want to overwrite it.
if (BindUriHelper.BaseUri == null)
{
BindUriHelper.BaseUri = browserJournal.BaseUri;
}
//CHECK: For xaml case, what should we set as the Startup Uri ? We set it the initial
//uri we started with, should this be changed to creating the window explicitly
//and navigating the window instead of setting the StartupUri?
//(Application.Current as Application).StartupUri = entry.Uri;
Debug.Assert(Application.Current != null, "BrowserJournalingError: Application object should already be created");
if (entry != null)
{
//Prevent navigations to StartupUri for history loads by canceling the StartingUp event
Application.Current.Startup += new System.Windows.StartupEventHandler(this.OnStartup);
_rbw.Value.JournalNavigationScope.NavigateToEntry(entry);
}
//else: fall back on navigating to StartupUri
}
else
{
if (!(journaledObject is int))
{
return(null);
}
journal = _rbw.Value.Journal;
int index = journal.FindIndexForEntryWithId((int)journaledObject);
Debug.Assert(journal[index].Id == (int)journaledObject, "BrowserJournalingError: Index retrieved from journal stream does not match index of journal entry");
// Check whether the navigation is canceled.
if (!_rbw.Value.JournalNavigationScope.NavigateToEntry(index))
{
// When the navigation is canceled, we want to notify browser to prevent the internal journal from
// getting out of sync with the browser's.
// The exception will be caught by the interop layer and browser will cancel the navigation as a result.
// If the navigation is initiated pragmatically by calling GoBack/Forward (comparing to user initiated
// by clicking the back/forward button), this will result in a managed exception at the call to ibcs.GoBack()
// in rbw.GoBackOverride(). rbw catches the exception when this happens.
throw new OperationCanceledException();
}
}
return(null);
}
internal void LoadHistoryStream(MemoryStream loadStream, bool firstLoadFromHistory)
{
if (Application.Current == null)
{
return;
}
LoadHistoryStreamInfo info = new LoadHistoryStreamInfo();
info.loadStream = loadStream ;
info.firstLoadFromHistory = firstLoadFromHistory ;
Application.Current.Dispatcher.Invoke(
DispatcherPriority.Send,
new DispatcherOperationCallback(_LoadHistoryStreamDelegate),
info);
}
