internal override int FindInsertionIndex(ChangeNotificationTracker tracker)
{
int insertionIndex = 0;
if (tracker != null && (tracker.ChildViewModels == null || tracker.ChildViewModels.Count < 1))
{
foreach (ModelProperty property in this.Value.Properties)
{
if (property != tracker.ParentProperty)
{
// assume this would increament
ChangeNotificationTracker propertyTracker = this.GetTracker(property, false);
if (propertyTracker != null)
{
insertionIndex = base.FindInsertionIndex(propertyTracker);
}
}
else
{
// we've reach the property and hence the last of the previous property
break;
}
}
}
else
{
insertionIndex = base.FindInsertionIndex(tracker);
}
return(insertionIndex);
}
internal override void UpdateChildren(ChangeNotificationTracker tracker, EventArgs e)
{
if (this.PerfEventProvider != null)
{
this.PerfEventProvider.DesignerTreeViewUpdateStart();
}
// Update VisualValue when promotedProperty's got changed.
if (this.promotedProperty != null && this.promotedProperty == tracker.ParentProperty)
{
this.VisualValue = this.promotedProperty.Value;
}
if (this.Children.Count == 1 && this.Children[0] == DummyNode)
{
// If the node never expanded before, LoadChildren instead of UpdateChildren.
// Otherwise, when expanding node, the LoadChildren method won't invoke
// Then other tracking properties cannot be setup correctly.
this.InternalChildren.Remove(DummyNode);
this.LoadChildren();
}
else
{
// If requireUpdateChildren = false, the related TreeViewItemModelPropertyViewModel take care of updating child nodes.
bool requireUpdateChildren = true;
if (e is PropertyChangedEventArgs && this.IsModelPropertyNodeExisted(tracker.ParentProperty))
{
ModelProperty modelProperty = tracker.ParentProperty;
if (modelProperty.Value != null)
{
string changedPropertyName = ((PropertyChangedEventArgs)e).PropertyName;
bool isPromotedPropertyChanged = TreeViewItemViewModel.IsPromotedProperty(modelProperty.Value, changedPropertyName);
if (isPromotedPropertyChanged)
{
if (modelProperty.Value.Properties[changedPropertyName].Value != null)
{
requireUpdateChildren = false;
}
}
else
{
requireUpdateChildren = false;
}
}
}
if (requireUpdateChildren)
{
base.UpdateChildren(tracker, e);
tracker.CleanUp();
TreeViewItemViewModel.AddModelProperty(this, this.Value, tracker.ParentProperty, tracker.ParentProperty);
}
}
if (this.PerfEventProvider != null)
{
this.PerfEventProvider.DesignerTreeViewUpdateEnd();
}
}
internal static void AddChild(TreeViewItemViewModel parent, ModelItem item, object value, bool duplicatedNodeVisible, string childNodePrefix, ModelProperty trackingProperty)
{
// If necessary, evaluate uniqueness of given item
bool isUnique = false;
if (!duplicatedNodeVisible)
{
// Note: These evaluations expect item to be an immediate child of trackingProperty.Value
// Intermediate nodes would for example undermine simple check just below
//
// Caveat 1: Aim is to greatly reduce, not to eliminate, display of nodes visible elsewhere
// Caveat 1a: Nodes reachable from other isolated nodes are included in the collection
// Caveat 1b: Nodes that are not isolated may be reachable from isolated nodes and thus
// displayed together with the isolated ones; ShowPropertyInOutlineViewAsSiblingAttribute may make this seem normal
// (If complete duplicate elimination were the aim, would likely need a "never expand"
// display mode for duplicateNodeVisible=false children)
// Caveat 2: Use of single uniqueChildren field may cause all children of a second
// duplcatedNodeVisible=false property to be ignored if (fortunately only if) neither
// property uses ShowPropertyInOutlineViewAttribute(true) -- that attribute's default
// Caveat 3-n: Please see caveats described at top of UniqueModelItemHelper
if (1 >= item.Parents.Count())
{
isUnique = true;
}
else
{
// Avoided a thorough evaluation as long as we can
if (null == parent.uniqueChildren)
{
parent.uniqueChildren = UniqueModelItemHelper.FindUniqueChildren(trackingProperty);
}
isUnique = parent.uniqueChildren.Contains(item);
}
}
// If displayable now, create the view model node
if (duplicatedNodeVisible || isUnique)
{
TreeViewItemViewModel child = TreeViewItemViewModel.CreateViewModel(parent, value);
child.NodePrefixText = childNodePrefix;
parent.AddChild(child, trackingProperty);
}
// Track for potential addition or removal of parents even if not presently visible
if (!duplicatedNodeVisible)
{
ModelItemImpl itemImpl = item as ModelItemImpl;
if (null != itemImpl)
{
ChangeNotificationTracker tracker = parent.GetTracker(trackingProperty);
tracker.AddCollection(itemImpl.InternalParents);
tracker.AddCollection(itemImpl.InternalSources);
}
}
}
internal virtual int FindInsertionIndex(ChangeNotificationTracker tracker)
{
int insertIndex = 0;
if (tracker != null && tracker.ChildViewModels != null && tracker.ChildViewModels.Count > 0)
{
//assume the childViewModels are in order
insertIndex = this.InternalChildren.IndexOf(tracker.ChildViewModels.Last()) + 1;
}
return(insertIndex);
}
internal virtual ChangeNotificationTracker GetTracker(ModelProperty modelProperty, bool createNew)
{
ChangeNotificationTracker tracker = null;
if (!this.Trackers.TryGetValue(modelProperty, out tracker) && createNew)
{
tracker = new ChangeNotificationTracker(this, modelProperty);
Trackers.Add(modelProperty, tracker);
}
return(tracker);
}
internal ChangeNotificationTracker GetTracker(TreeViewItemViewModel child)
{
ChangeNotificationTracker trackerForChild = null;
foreach (ChangeNotificationTracker tracker in this.Trackers.Values)
{
if (tracker.ChildViewModels.Contains(child))
{
trackerForChild = tracker;
break;
}
}
Fx.Assert(trackerForChild != null, "Tracker should not be null");
return(trackerForChild);
}
internal override ChangeNotificationTracker GetTracker(ModelProperty modelProperty, bool createNew)
{
ChangeNotificationTracker tracker = base.GetTracker(modelProperty, createNew);
if (createNew)
{
Fx.Assert(this.Value == modelProperty, "The modelProperty should be the same as this.Value.");
tracker.Add(modelProperty.Parent, modelProperty);
ShowInOutlineViewAttribute viewVisible = ExtensibilityAccessor.GetAttribute <ShowInOutlineViewAttribute>(modelProperty);
if (viewVisible != null && !string.IsNullOrWhiteSpace(viewVisible.PromotedProperty))
{
ModelProperty promotedProperty = modelProperty.Value.Properties.Find(viewVisible.PromotedProperty);
tracker.Add(promotedProperty.Parent, promotedProperty);
}
}
return(tracker);
}
internal override void UpdateChildren(ChangeNotificationTracker tracker, EventArgs e)
{
if (this.PerfEventProvider != null)
{
this.PerfEventProvider.DesignerTreeViewUpdateStart();
}
base.UpdateChildren(tracker, e);
tracker.CleanUp();
if (this.Value.Value != null)
{
this.AddChild(TreeViewItemViewModel.CreateViewModel(this, this.Value.Value), tracker.ParentProperty);
}
if (this.PerfEventProvider != null)
{
this.PerfEventProvider.DesignerTreeViewUpdateEnd();
}
}
internal override void UpdateChildren(ChangeNotificationTracker tracker, EventArgs e)
{
if (this.PerfEventProvider != null)
{
this.PerfEventProvider.DesignerTreeViewUpdateStart();
}
//
base.UpdateChildren(tracker, e);
tracker.CleanUp();
this.InternalChildren.Clear();
this.LoadChildren();
if (this.PerfEventProvider != null)
{
this.PerfEventProvider.DesignerTreeViewUpdateEnd();
}
}
internal override void LoadChildren()
{
if (this.PerfEventProvider != null)
{
this.PerfEventProvider.DesignerTreeViewLoadChildrenStart();
}
base.LoadChildren();
if (this.Value.Value != null)
{
ChangeNotificationTracker tracker = this.Parent.GetTracker(this);
this.AddChild(TreeViewItemViewModel.CreateViewModel(this, this.Value.Value), tracker.ParentProperty);
}
if (this.PerfEventProvider != null)
{
this.PerfEventProvider.DesignerTreeViewLoadChildrenEnd();
}
}
internal override ChangeNotificationTracker GetTracker(ModelProperty modelProperty, bool createNew)
{
ChangeNotificationTracker tracker = base.GetTracker(modelProperty, createNew);
if (createNew)
{
if (this.VisualValue == modelProperty.Parent)
{
// If this TreeViewModelItem use Promopted property and the property belongs to Promoted activity
// add the tracked property by default.
tracker.Add(this.VisualValue, modelProperty);
}
else
{
// If it's an model item, add the tracked property by default
tracker.Add(this.Value, modelProperty);
}
}
return(tracker);
}
//if child is null then only add the modelProperty for tracking purpose
internal virtual void AddChild(TreeViewItemViewModel child, ModelProperty modelProperty)
{
//check for duplicate first
if (child != null)
{
object childValue = child.GetValue();
if (!ChildrenValueCache.Contains(childValue))
{
ChildrenValueCache.Add(childValue);
}
else
{
child.CleanUp();
return;
}
}
ChangeNotificationTracker tracker = GetTracker(modelProperty);
if (child != null)
{
// May be adding a node before it's expanded; get rid of the dummy
if (this.Children.Count == 1 && this.Children[0] == DummyNode)
{
this.InternalChildren.Remove(DummyNode);
}
int insertIndex = this.FindInsertionIndex(tracker);
this.InternalChildren.Insert(insertIndex, child);
tracker.ChildViewModels.Add(child);
if (child.HasSibling)
{
//loading children rather than just add the sibling of the children
//if this turn out to be a big performance impact then we'll need to optimise this
child.LoadChildren();
}
}
}
internal static void AddModelProperty(TreeViewItemViewModel parent, ModelItem item, ModelProperty trackingProperty, ModelProperty property)
{
//in the case of multiple attributes, they go in this order
//HidePropertyInOutlineViewAttribute
//[item.ShowInOutlineViewAttribute.PromotedProperty = property.Name]. Set VisualValue by property and ignore itself. Usage ActivityDelegate, FlowStep.
//ShowPropertyInOutlineViewAttribute
//ShowPropertyInOutlineViewAsSiblingAttribute
//ShowInOutlineViewAttribute
ShowPropertyInOutlineViewAttribute viewChild = ExtensibilityAccessor.GetAttribute <ShowPropertyInOutlineViewAttribute>(property);
if (ExtensibilityAccessor.GetAttribute <HidePropertyInOutlineViewAttribute>(property) != null)
{
//ignore
return;
}
else if (IsPromotedProperty(item, property))
{
if (property.IsCollection)
{
ModelItemCollection mc = property.Value as ModelItemCollection;
AddModelItemCollection(parent, mc, trackingProperty);
}
else if (property.IsDictionary)
{
ModelItemDictionary dictionary = property.Dictionary;
AddModelItemDictionary(parent, dictionary, trackingProperty);
}
else
{
parent.GetTracker(trackingProperty).Add(item, property);
//if property.Value is null, then this would not add any node
// Use promoted ModelItem's property to track, so pass null to AddModelItem method.
AddModelItem(parent, property.Value, null);
}
}
else if (viewChild != null)
{
if (viewChild.CurrentPropertyVisible) //property node visible
{
if (property.Value != null)
{
TreeViewItemViewModel childModel = TreeViewItemViewModel.CreateViewModel(parent, property);
childModel.DuplicatedNodeVisible = viewChild.DuplicatedChildNodesVisible;
parent.AddChild(childModel, trackingProperty);
}
else
{
//just add the notification tracker without adding the empty child
parent.GetTracker(trackingProperty, true).Add(item, trackingProperty);
}
}
else
{
if (property.IsCollection)
{
ModelItemCollection mc = property.Value as ModelItemCollection;
AddModelItemCollection(parent, mc, trackingProperty);
}
else if (property.IsDictionary)
{
ModelItemDictionary dictionary = property.Dictionary;
AddModelItemDictionary(parent, dictionary, trackingProperty);
}
else
{
if (property.Value != null)
{
TreeViewItemViewModel childModel = TreeViewItemViewModel.CreateViewModel(parent, property.Value);
childModel.DuplicatedNodeVisible = viewChild.DuplicatedChildNodesVisible;
parent.AddChild(childModel, trackingProperty);
}
else
{
parent.GetTracker(trackingProperty).Add(item, property);
}
}
}
}
else if (ExtensibilityAccessor.GetAttribute <ShowPropertyInOutlineViewAsSiblingAttribute>(property) != null)
{
//add notification to the tracker that is responsible for this node
ChangeNotificationTracker tracker = parent.Parent.GetTracker(parent);
tracker.Add(item, property);
TreeViewItemViewModel siblingNode = null;
if (property.Value != null)
{
siblingNode = TreeViewItemViewModel.CreateViewModel(parent.Parent, property.Value);
}
parent.Parent.AddChild(siblingNode, tracker.ParentProperty);
}
else if (ExtensibilityAccessor.GetAttribute <ShowInOutlineViewAttribute>(property) != null)
{
if (property.Value != null)
{
ShowInOutlineViewAttribute outlineView = ExtensibilityAccessor.GetAttribute <ShowInOutlineViewAttribute>(property);
if (string.IsNullOrWhiteSpace(outlineView.PromotedProperty))
{
parent.AddChild(TreeViewItemViewModel.CreateViewModel(parent, property), trackingProperty);
}
else
{
ModelProperty promotedProperty = property.Value.Properties.Find(outlineView.PromotedProperty);
if (promotedProperty == null)
{
throw FxTrace.Exception.AsError(new InvalidOperationException(string.Format(CultureInfo.CurrentCulture, SR.PromotedPropertyNotFound, outlineView.PromotedProperty, property.Value.Name)));
}
// Add promoted ModelItem and property into tracker. So when property got changed, the grandparent of promoted ModelItem will be notified.
ChangeNotificationTracker tracker = parent.GetTracker(trackingProperty, true);
tracker.Add(property.Value, promotedProperty);
if (promotedProperty.Value == null)
{
tracker.Add(item, property);
}
else
{
parent.AddChild(TreeViewItemViewModel.CreateViewModel(parent, property), trackingProperty);
}
}
}
else
{
parent.GetTracker(trackingProperty, true).Add(item, property);
}
}
//if the values in the dictionary is viewvisible, note this only works with generic dictionary
else if (property.IsDictionary && property.PropertyType.IsGenericType)
{
Type[] arguments = property.PropertyType.GetGenericArguments();
if (ExtensibilityAccessor.GetAttribute <ShowInOutlineViewAttribute>(arguments[1]) != null)
{
if (property.Value != null)
{
parent.AddChild(TreeViewItemViewModel.CreateViewModel(parent, property), trackingProperty);
}
else
{
parent.GetTracker(trackingProperty, true).Add(item, property);
}
}
}
}
internal virtual void UpdateChildren(ChangeNotificationTracker tracker, EventArgs e)
{
this.uniqueChildren = null;
}
internal virtual void UpdateChildren(ChangeNotificationTracker tracker, EventArgs e)
{
this.uniqueChildren = null;
}
internal virtual int FindInsertionIndex(ChangeNotificationTracker tracker)
{
int insertIndex = 0;
if (tracker != null && tracker.ChildViewModels != null && tracker.ChildViewModels.Count > 0)
{
//assume the childViewModels are in order
insertIndex = this.InternalChildren.IndexOf(tracker.ChildViewModels.Last()) + 1;
}
return insertIndex;
}
internal virtual ChangeNotificationTracker GetTracker(ModelProperty modelProperty, bool createNew)
{
ChangeNotificationTracker tracker = null;
if (!this.Trackers.TryGetValue(modelProperty, out tracker) && createNew)
{
tracker = new ChangeNotificationTracker(this, modelProperty);
Trackers.Add(modelProperty, tracker);
}
return tracker;
}
