internal override void Detach()
{
_document = null;
base.Detach();
}
public DocumentClosedEventArgs(LayoutDocument document)
{
Document = document;
}
private void DocumentsSourceElementsChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (Layout == null)
return;
//When deserializing documents are created automatically by the deserializer
if (SuspendDocumentsSourceBinding)
return;
//handle remove
if (e.Action == NotifyCollectionChangedAction.Remove ||
e.Action == NotifyCollectionChangedAction.Replace)
{
if (e.OldItems != null)
{
var documentsToRemove =
Layout.Descendents()
.OfType<LayoutDocument>()
.Where(d => e.OldItems.Contains(d.Content))
.ToArray();
foreach (var documentToRemove in documentsToRemove)
{
documentToRemove.Parent.RemoveChild(
documentToRemove);
}
}
}
//handle add
if (e.NewItems != null &&
(e.Action == NotifyCollectionChangedAction.Add ||
e.Action == NotifyCollectionChangedAction.Replace))
{
if (e.NewItems != null)
{
LayoutDocumentPane documentPane = null;
if (Layout.LastFocusedDocument != null)
{
documentPane = Layout.LastFocusedDocument.Parent as LayoutDocumentPane;
}
if (documentPane == null)
{
documentPane = Layout.Descendents().OfType<LayoutDocumentPane>().FirstOrDefault();
}
_suspendLayoutItemCreation = true;
foreach (var documentContentToImport in e.NewItems)
{
var documentToImport = new LayoutDocument()
{
Content = documentContentToImport
};
bool added = false;
if (LayoutUpdateStrategy != null)
{
added = LayoutUpdateStrategy.BeforeInsertDocument(Layout, documentToImport, documentPane);
}
if (!added)
{
if (documentPane == null)
throw new InvalidOperationException(
"Layout must contains at least one LayoutDocumentPane in order to host documents");
documentPane.Children.Add(documentToImport);
}
LayoutUpdateStrategy?.AfterInsertDocument(Layout, documentToImport);
var root = documentToImport.Root;
if (root != null && Equals(root.Manager, this))
{
CreateDocumentLayoutItem(documentToImport);
}
}
_suspendLayoutItemCreation = false;
}
}
if (e.Action == NotifyCollectionChangedAction.Reset)
{
//NOTE: I'm going to clear every document present in layout but
//some documents may have been added directly to the layout, for now I clear them too
var documentsToRemove = Layout.Descendents().OfType<LayoutDocument>().ToArray();
foreach (var documentToRemove in documentsToRemove)
{
documentToRemove.Parent.RemoveChild(
documentToRemove);
}
}
Layout?.CollectGarbage();
}
internal override void Attach(LayoutContent model)
{
_document = model as LayoutDocument;
base.Attach(model);
}
private void AttachDocumentsSource(LayoutRoot layout, IEnumerable documentsSource)
{
if (documentsSource == null)
return;
if (layout == null)
return;
var documentsImported = layout.Descendents().OfType<LayoutDocument>().Select(d => d.Content).ToArray();
var documents = documentsSource;
var listOfDocumentsToImport = new List<object>(documents.OfType<object>());
foreach (var document in listOfDocumentsToImport.ToArray().Where(document => documentsImported.Contains(document)))
{
listOfDocumentsToImport.Remove(document);
}
LayoutDocumentPane documentPane = null;
if (layout.LastFocusedDocument != null)
{
documentPane = layout.LastFocusedDocument.Parent as LayoutDocumentPane;
}
if (documentPane == null)
{
documentPane = layout.Descendents().OfType<LayoutDocumentPane>().FirstOrDefault();
}
_suspendLayoutItemCreation = true;
foreach (var documentContentToImport in listOfDocumentsToImport)
{
var documentToImport = new LayoutDocument()
{
Content = documentContentToImport
};
bool added = false;
if (LayoutUpdateStrategy != null)
{
added = LayoutUpdateStrategy.BeforeInsertDocument(layout, documentToImport, documentPane);
}
if (!added)
{
if (documentPane == null)
throw new InvalidOperationException(
"Layout must contains at least one LayoutDocumentPane in order to host documents");
documentPane.Children.Add(documentToImport);
}
LayoutUpdateStrategy?.AfterInsertDocument(layout, documentToImport);
CreateDocumentLayoutItem(documentToImport);
}
_suspendLayoutItemCreation = true;
var documentsSourceAsNotifier = documentsSource as INotifyCollectionChanged;
if (documentsSourceAsNotifier != null)
documentsSourceAsNotifier.CollectionChanged += DocumentsSourceElementsChanged;
}
private void CreateDocumentLayoutItem(LayoutDocument contentToAttach)
{
if (_layoutItems.Any(item => Equals(item.LayoutElement, contentToAttach)))
return;
var layoutItem = new LayoutDocumentItem();
layoutItem.Attach(contentToAttach);
ApplyStyleToLayoutItem(layoutItem);
_layoutItems.Add(layoutItem);
if (contentToAttach?.Content is UIElement)
{
InternalAddLogicalChild(contentToAttach.Content);
}
}
internal void _ExecuteCloseCommand(LayoutDocument document)
{
if (DocumentClosing != null)
{
var evargs = new DocumentClosingEventArgs(document);
DocumentClosing(this, evargs);
if (evargs.Cancel)
return;
}
if (!document.TestCanClose())
return;
document.Close();
if (DocumentClosed != null)
{
var evargs = new DocumentClosedEventArgs(document);
DocumentClosed(this, evargs);
}
}
public override void ReplaceChild(ILayoutElement oldElement, ILayoutElement newElement)
{
Debug.Assert(Equals(oldElement, RootDocument) && oldElement != null);
RootDocument = newElement as LayoutDocument;
}
public override void RemoveChild(ILayoutElement element)
{
Debug.Assert(Equals(element, RootDocument) && element != null);
RootDocument = null;
}
public override void ReplaceChild(ILayoutElement oldElement, ILayoutElement newElement)
{
Debug.Assert(Equals(oldElement, RootDocument) && oldElement != null);
RootDocument = newElement as LayoutDocument;
}
public override void RemoveChild(ILayoutElement element)
{
Debug.Assert(Equals(element, RootDocument) && element != null);
RootDocument = null;
}