/// <summary>
/// Ensures current data about the current page is stored in the journal.
/// This either updates an existing entry or adds a new one.
/// </summary>
/// <param name="journalEntry"></param>
internal void UpdateCurrentEntry(JournalEntry journalEntry)
{
if (journalEntry == null)
{
throw new ArgumentNullException("journalEntry");
}
Debug.Assert(journalEntry.ContentId != 0);
Debug.Assert(!(journalEntry.IsAlive() && journalEntry.JEGroupState.JournalDataStreams != null),
"Keep-alive content state should not be serialized.");
if (_currentEntryIndex > -1 && _currentEntryIndex < TotalCount)
{
// update existing entry using the old entry's index.
// Note: the new entry can be for a different NavigationService.
JournalEntry oldEntry = _journalEntryList[_currentEntryIndex];
journalEntry.Id = oldEntry.Id;
_journalEntryList[_currentEntryIndex] = journalEntry;
}
else
{
// add new entry to the front
journalEntry.Id = ++_journalEntryId;
_journalEntryList.Add(journalEntry);
}
_version++;
// If the next navigation is not #fragment or CustomContentState, this entry should be
// remembered as the "exit" entry for the group, so when navigating back to the same
// page, it will be shown. (It is not necessarily the last one in the group.)
// Journal filtering will hide all other entries while at another page (different
// NavigationService.Content object).
journalEntry.JEGroupState.GroupExitEntry = journalEntry;
}
// This is only called from ApplicationProxyInternal.GetSaveHistoryBytes when
// we are persisting the entire journal; we only do that when we're quitting.
// [new] Also when navigating a Frame that has its own journal.
//
internal void PruneKeepAliveEntries()
{
for (int i = TotalCount - 1; i >= 0; --i)
{
JournalEntry je = _journalEntryList[i];
if (je.IsAlive())
{
RemoveEntryInternal(i);
}
else
{
Debug.Assert(je.GetType().IsSerializable);
// There can be keep-alive JEs creates for child frames.
DataStreams jds = je.JEGroupState.JournalDataStreams;
if (jds != null)
{
jds.PrepareForSerialization();
}
if (je.RootViewerState != null)
{
je.RootViewerState.PrepareForSerialization();
}
}
}
}
// Token: 0x060028E1 RID: 10465 RVA: 0x000BD7C4 File Offset: 0x000BB9C4
internal void PruneKeepAliveEntries()
{
for (int i = this.TotalCount - 1; i >= 0; i--)
{
JournalEntry journalEntry = this._journalEntryList[i];
if (journalEntry.IsAlive())
{
this.RemoveEntryInternal(i);
}
else
{
DataStreams journalDataStreams = journalEntry.JEGroupState.JournalDataStreams;
if (journalDataStreams != null)
{
journalDataStreams.PrepareForSerialization();
}
if (journalEntry.RootViewerState != null)
{
journalEntry.RootViewerState.PrepareForSerialization();
}
}
}
}
/// <summary>
/// Ensures current data about the current page is stored in the journal.
/// This either updates an existing entry or adds a new one.
/// </summary>
/// <param name="journalEntry"></param>
internal void UpdateCurrentEntry(JournalEntry journalEntry)
{
if (journalEntry == null)
{
throw new ArgumentNullException("journalEntry");
}
Debug.Assert(journalEntry.ContentId != 0);
Debug.Assert(!(journalEntry.IsAlive() && journalEntry.JEGroupState.JournalDataStreams != null),
"Keep-alive content state should not be serialized.");
if (_currentEntryIndex > -1 && _currentEntryIndex < TotalCount)
{
// update existing entry using the old entry's index.
// Note: the new entry can be for a different NavigationService.
JournalEntry oldEntry = _journalEntryList[_currentEntryIndex];
journalEntry.Id = oldEntry.Id;
_journalEntryList[_currentEntryIndex] = journalEntry;
}
else
{
// add new entry to the front
journalEntry.Id = ++_journalEntryId;
_journalEntryList.Add(journalEntry);
}
_version++;
// If the next navigation is not #fragment or CustomContentState, this entry should be
// remembered as the "exit" entry for the group, so when navigating back to the same
// page, it will be shown. (It is not necessarily the last one in the group.)
// Journal filtering will hide all other entries while at another page (different
// NavigationService.Content object).
journalEntry.JEGroupState.GroupExitEntry = journalEntry;
}
