// Token: 0x06002A5E RID: 10846 RVA: 0x000C25A0 File Offset: 0x000C07A0
internal void _AddEventHandler(Delegate d)
{
PageFunctionBase pageFunctionBase = d.Target as PageFunctionBase;
if (pageFunctionBase != null)
{
this.ParentPageFunctionId = pageFunctionBase.PageFunctionId;
}
this._returnHandler = Delegate.Combine(this._returnHandler, d);
}
// Token: 0x06002A7A RID: 10874 RVA: 0x000C2724 File Offset: 0x000C0924
internal void RaiseTypedReturnEvent(PageFunctionBase b, RaiseTypedEventArgs args)
{
Delegate d = args.D;
object o = args.O;
if (d != null)
{
ReturnEventArgs <T> e = o as ReturnEventArgs <T>;
ReturnEventHandler <T> returnEventHandler = d as ReturnEventHandler <T>;
returnEventHandler(this, e);
}
}
internal void _AddEventHandler(Delegate d)
{
// This is where the parent-child relationship is established. If
// PageFunction A attaches one of its methods to PageFunction B's
// Return event, then A must be B's parent.
PageFunctionBase parent = d.Target as PageFunctionBase;
if (parent != null)
{
ParentPageFunctionId = parent.PageFunctionId;
}
_returnHandler = Delegate.Combine(_returnHandler, d);
}
///<summary>
/// Used to raise a strongly typed return event. Sealed since nobody should have the need to override as
/// all derived types of this generic type will automatically get the strongly typed version from this
/// generic version.
///</summary>
internal void RaiseTypedReturnEvent(PageFunctionBase b, RaiseTypedEventArgs args)
{
Delegate d = args.D;
object returnEventArgs = args.O;
if (d != null)
{
ReturnEventArgs <T> ra = returnEventArgs as ReturnEventArgs <T>;
Debug.Assert((returnEventArgs == null) || (ra != null));
ReturnEventHandler <T> eh = d as ReturnEventHandler <T>;
Debug.Assert(eh != null);
eh(this, ra);
}
}
internal void _Detach(PageFunctionBase pf)
{
if (pf._Return != null && pf._Saver == null)
{
ReturnEventSaverInfo[] list = null;
Delegate[] delegates = null;
delegates = (pf._Return).GetInvocationList();
list = _returnList = new ReturnEventSaverInfo[delegates.Length];
for (int i = 0; i < delegates.Length; i++)
{
Delegate returnDelegate = delegates[i];
bool bSamePf = false;
if (returnDelegate.Target == pf)
{
// This is the Event Handler implemented by the same PF, use for NonGeneric handling.
bSamePf = true;
}
MethodInfo m = returnDelegate.Method;
ReturnEventSaverInfo info = new ReturnEventSaverInfo(
returnDelegate.GetType().AssemblyQualifiedName,
returnDelegate.Target.GetType().AssemblyQualifiedName,
m.Name, bSamePf);
list[i] = info;
}
//
// only save if there were delegates already attached.
// note that there will be cases where the Saver has already been pre-populated from a Load
// but no delegates have been created yet ( as the PF hasn`t called finish as yet)
//
// By only storing the saver once there are delegates - we avoid the problem of
// wiping out any newly restored saver
pf._Saver = this;
}
pf._DetachEvents();
}
// Ctors
/////////////////////////////////////////////////////////////////////
#region Ctors
internal JournalEntryPageFunctionKeepAlive(JournalEntryGroupState jeGroupState, PageFunctionBase pageFunction)
: base(jeGroupState, pageFunction)
{
Debug.Assert(pageFunction != null && pageFunction.KeepAlive);
this._keepAlivePageFunction = pageFunction;
}
//
// This method is to get the journal entry index in the Journal List for the parent page
// of this PageFunction.
//
// The parent page could be a PageFunction or a Non-PageFunction.
// For the non PageFunction case, it could have a Uri or could not have a Uri.
//
// Case 1: The ParentPageFunction has been set, so just go back and look for it.
// Case 2: The ParentPageFunction has NOT been set, so the parent must be most recent non-PF entry.
//
internal static int GetParentPageJournalIndex(NavigationService NavigationService, Journal journal, PageFunctionBase endingPF)
{
JournalEntryPageFunction pageFunctionEntry;
JournalEntry journalEntry;
for (int index = journal.CurrentIndex - 1; index >= 0; --index)
{
journalEntry = journal[index];
// Be sure that the navigation containers match
if (journalEntry.NavigationServiceId != NavigationService.GuidId)
continue;
pageFunctionEntry = journalEntry as JournalEntryPageFunction;
if (endingPF.ParentPageFunctionId == Guid.Empty)
{
// We are looking for a non-PageFunction
if (pageFunctionEntry == null)
{
return index; // found!
}
}
else
{
// we are looking for a PageFunction
if ((pageFunctionEntry != null) && (pageFunctionEntry.PageFunctionId == endingPF.ParentPageFunctionId))
{
return index; // found!
}
}
}
Debug.Assert(endingPF.ParentPageFunctionId == Guid.Empty,
"Should have been able to find the parent if the ParentPageFunctionId was set. Are they in different NavigationServices? They shouldn't be.");
return _NoParentPage;
}
// Ctors
/////////////////////////////////////////////////////////////////////
#region Ctors
internal JournalEntryPageFunction(JournalEntryGroupState jeGroupState, PageFunctionBase pageFunction)
: base(jeGroupState, null)
{
PageFunctionId = pageFunction.PageFunctionId;
ParentPageFunctionId = pageFunction.ParentPageFunctionId;
}
internal PageFunctionReturnInfo(PageFunctionBase finishingChildPageFunction, Uri source, NavigationMode navigationMode, JournalEntry journalEntry, object returnEventArgs)
: base(source, navigationMode, journalEntry)
{
_returnEventArgs = returnEventArgs;
_finishingChildPageFunction = finishingChildPageFunction;
}
// Navigate to the Parent page.
// Two cases:
// Parent is a PageFunction: parentPF is not null.
// Parent is a Non PageFunction: parentPF is null,
// the valid info are parentIndex and ReturnEventArgs.
// The kind of navigation depends on finishingChildPageFunction.RemoveFromJournal:
// - True: then do journal navigation to the parent page (and no journal entry created
// for the finishing PF)
// - False: do new navigation to the parent page.
private void NavigateToParentPage(PageFunctionBase finishingChildPageFunction, PageFunctionBase parentPF, object returnEventArgs, int parentIndex)
{
JournalEntry parentEntry = (JournalScope.Journal)[parentIndex];
if (parentPF != null)
{
// We shouldn't be navigating to a PageFunction that's UiLess at this stage.
// By now it should have started another navigation it was delegating to a child PF.
if (parentEntry.EntryType == JournalEntryType.UiLess)
throw new InvalidOperationException(SR.Get(SRID.UiLessPageFunctionNotCallingOnReturn));
NavigateInfo navInfo = finishingChildPageFunction.RemoveFromJournal ?
new NavigateInfo(parentEntry.Source, NavigationMode.Back, parentEntry) :
new NavigateInfo(parentEntry.Source, NavigationMode.New);
Navigate(parentPF, navInfo);
return;
}
// Handle the NonPF parent page case.
// Passing PageFunctionReturnInfo signals that the Return event should be raised for
// the finishing child PF.
PageFunctionReturnInfo pfRetInfo =
finishingChildPageFunction.RemoveFromJournal ?
new PageFunctionReturnInfo(finishingChildPageFunction, parentEntry.Source,
NavigationMode.Back, parentEntry, returnEventArgs) :
new PageFunctionReturnInfo(finishingChildPageFunction, parentEntry.Source,
NavigationMode.New, null, returnEventArgs);
if (parentEntry is JournalEntryUri)
{
this.Navigate(parentEntry.Source, pfRetInfo);
}
else if (parentEntry is JournalEntryKeepAlive)
{
object root = ((JournalEntryKeepAlive)parentEntry).KeepAliveRoot;
this.Navigate(root, pfRetInfo);
}
else
{
Debug.Fail("Unhandled scenario: PageFunction returning to " + parentEntry.GetType().Name);
}
}
private void InitializeComponent(PageFunctionBase pageFunction)
{
// Need to explicitly add a call to InitializeComponent() for Page
IComponentConnector iComponentConnector = pageFunction as IComponentConnector;
if (iComponentConnector != null)
{
iComponentConnector.InitializeComponent();
}
}
private void HandleFinish(PageFunctionBase endingPF, object ReturnEventArgs)
{
if (EventTrace.IsEnabled(EventTrace.Keyword.KeywordHosting, EventTrace.Level.Info))
{
EventTrace.EventProvider.TraceEvent(
EventTrace.Event.Wpf_NavigationPageFunctionReturn, EventTrace.Keyword.KeywordHosting, EventTrace.Level.Info,
endingPF.ToString());
}
//
Debug.Assert(_navigateQueueItem == null,
"There's a navigation pending - see kusumav for details");
// NOTE: It is not always that endingPF==_bp. A PF may end itself when its child ends. Then
// HandleFinish() will be called for the grandparent PF while _bp is still the child PF.
if (JournalScope == null)
{
throw new InvalidOperationException(SR.Get(SRID.WindowAlreadyClosed));
}
Journal journal = JournalScope.Journal;
PageFunctionBase parentPF = null;
int parentIndex = JournalEntryPageFunction.GetParentPageJournalIndex(this, journal, endingPF);
if (endingPF.RemoveFromJournal)
{
DoRemoveFromJournal(endingPF, parentIndex);
}
// If the parent page is a PF, resume it and let it know the child PF returned.
// If it's not a PF, the Return event will be raised later on - see NavigateToParentPage().
if (parentIndex != _noParentPage)
{
JournalEntryPageFunction parentPfEntry = journal[parentIndex] as JournalEntryPageFunction;
if (parentPfEntry != null)
{
parentPF = parentPfEntry.ResumePageFunction();
// Need to set the FinishHandler here because the PF's Return event handler
// may decide to call OnReturn().
parentPF.FinishHandler = this.FinishHandler;
FireChildPageFunctionReturnEvent(parentPF, endingPF, ReturnEventArgs);
}
}
// if the parent requested a new child, don't navigate to the parent
//
if (_navigateQueueItem == null)
{
// Navigate to the Parent page.
// Two cases:
// Parent is a PageFunction: bParentIsPF is true, parentPF is not null.
// Parent is a Non PageFunction: bParentIsPF is false, parentPF is null,
// the valid info are parentIndex and ReturnEventArgs.
// There may have been recursive calls into HandleFinish(). As we are unwinding here,
// parentIndex may point to a journal entry that was already removed. If the parent PF
// started a navigation (new or to its parent), we'd be in the 'else' case. But if that
// navigation was canceled, _navigateQueueItem==null. One special case in which this
// happens is when the entire "wizard" window is closed. Then NS is disposed.
if (parentIndex != _noParentPage && parentIndex < journal.TotalCount && !IsDisposed)
{
NavigateToParentPage(endingPF, parentPF, ReturnEventArgs, parentIndex);
}
//
}
else
{
// The parent requested a navigation(usually to another child PF but could be a regular Xaml)
// Update the parent's state in the journal
// Special case: the parent PF has the RemoveFromJournal flag, and it returned to its parent.
// Then parentIndex is not valid anymore.
if (parentIndex < journal.TotalCount)
{
JournalEntryPageFunction entry = (JournalEntryPageFunction)journal[parentIndex];
entry.SaveState(parentPF);
}
// Return event handler should not be left attached.
Debug.Assert(parentPF._Return == null);
parentPF.FinishHandler = null;
}
}
internal void _Attach(Object caller, PageFunctionBase child)
{
ReturnEventSaverInfo[] list = null;
list = _returnList;
if (list != null)
{
Debug.Assert(caller != null, "Caller should not be null");
for (int i = 0; i < list.Length; i++)
{
//
//
if (string.Compare(_returnList[i]._targetTypeName, caller.GetType().AssemblyQualifiedName, StringComparison.Ordinal) != 0)
{
throw new NotSupportedException(SR.Get(SRID.ReturnEventHandlerMustBeOnParentPage));
}
Delegate d;
try
{
new ReflectionPermission(ReflectionPermissionFlag.MemberAccess).Assert(); // BlessedAssert
d = Delegate.CreateDelegate(
Type.GetType(_returnList[i]._delegateTypeName),
caller,
_returnList[i]._delegateMethodName);
}
catch (Exception ex)
{
throw new NotSupportedException(SR.Get(SRID.ReturnEventHandlerMustBeOnParentPage), ex);
}
finally
{
ReflectionPermission.RevertAssert();
}
child._AddEventHandler(d);
}
}
}
// Token: 0x060029FF RID: 10751 RVA: 0x000C1A81 File Offset: 0x000BFC81
internal PageFunctionReturnInfo(PageFunctionBase finishingChildPageFunction, Uri source, NavigationMode navigationMode, JournalEntry journalEntry, object returnEventArgs) : base(source, navigationMode, journalEntry)
{
this._returnEventArgs = returnEventArgs;
this._finishingChildPageFunction = finishingChildPageFunction;
}
// Ctors
/////////////////////////////////////////////////////////////////////
#region Ctors
//
// Ctor of JournalEntryPageFunctionSaver
//
internal JournalEntryPageFunctionSaver(JournalEntryGroupState jeGroupState, PageFunctionBase pageFunction)
: base(jeGroupState, pageFunction)
{
Debug.Assert(!pageFunction.KeepAlive);
}
internal JournalEntryPageFunctionType(JournalEntryGroupState jeGroupState, PageFunctionBase pageFunction)
: base(jeGroupState, pageFunction)
{
string typeName = pageFunction.GetType().AssemblyQualifiedName;
this._typeName = new SecurityCriticalDataForSet<string>(typeName);
}
//
// This method will reattach the return handler to the parent page.
// and then fire the return event on the child pagefunction.
//
private void FireChildPageFunctionReturnEvent(object parentElem, PageFunctionBase childPF, object ReturnEventArgs)
{
ReturnEventSaver saver = childPF._Saver; // get the endingPF's saved info
if (saver != null)
{
saver._Attach(parentElem, childPF); // reattach the parent to the child
// When the Return event handler is invoked on the parent element, the parent is not in the tree.
// But developers need to access the NavigationService from the Return event handler (to be able to
// start new navigation). To make this scenario straightforward, set the NavigationService property
// before raising the Return event and clear it afterwards. See details of the scenario in Dev10 bug 451875.
// Similar issue with Window.GetWindow()...
Window window = null;
DependencyObject dobj = parentElem as DependencyObject;
if ((dobj != null) && (!dobj.IsSealed))
{
dobj.SetValue(NavigationServiceProperty, this);
var host = this.INavigatorHost as DependencyObject;
if (host != null && (window = Window.GetWindow(host)) != null)
{
dobj.SetValue(Window.IWindowServiceProperty, window);
}
}
// Event handler exception continuality: if exception occurs in Return event handler, we are going to stop loading
// and stop at the child pagefunction and not returning to parent.
try
{
childPF._OnFinish(ReturnEventArgs); // then call the endingPF to fire it's event
}
catch
{
DoStopLoading(true, false);
throw;
}
finally
{
saver._Detach(childPF); // now detach the event handler since we're done
if ((dobj != null) && (!dobj.IsSealed))
{
dobj.ClearValue(NavigationServiceProperty);
if (window != null)
{
dobj.ClearValue(Window.IWindowServiceProperty);
}
}
}
}
}
// Ctors
/////////////////////////////////////////////////////////////////////
#region Ctors
internal JournalEntryPageFunctionUri(JournalEntryGroupState jeGroupState, PageFunctionBase pageFunction, Uri markupUri)
: base(jeGroupState, pageFunction)
{
_markupUri = markupUri;
}
/// <summary>
/// Deletes everything in this NavigationService from the *first* instance of the
/// finishing PageFunction on.
/// </summary>
private void DoRemoveFromJournal(PageFunctionBase finishingChildPageFunction, int parentEntryIndex/* = -1 */)
{
if (!finishingChildPageFunction.RemoveFromJournal)
return;
bool deleting = false;
Journal journal = JournalScope.Journal;
int journalEntryIndex = parentEntryIndex + 1;
while (journalEntryIndex < journal.TotalCount)
{
if (!deleting) // we haven't found the first one yet
{
// is this the first one?
JournalEntryPageFunction journalPageFunction =
journal[journalEntryIndex] as JournalEntryPageFunction;
deleting = (journalPageFunction != null) &&
(journalPageFunction.PageFunctionId == finishingChildPageFunction.PageFunctionId);
}
if (deleting)
{
journal.RemoveEntryInternal(journalEntryIndex);
}
else
{
journalEntryIndex++;
}
}
if (deleting)
{
journal.UpdateView(); // RemoveEntryInternal() doesn't do this.
}
else
{
// If the PF is not found, it simply wasn't journaled, and it must be the
// current page.
if (object.ReferenceEquals(_bp, finishingChildPageFunction))
{
Debug.Assert(parentEntryIndex < journal.CurrentIndex);
journal.ClearForwardStack();
}
else
{
Debug.Fail("Could not find the finishing PageFunction in the journal.");
}
}
// When the next navigation occurs (back to parent or new), the current page
// (finishingChildPageFunction or another PF started by it) should not be journaled.
_doNotJournalCurrentContent = true;
}
