private void Initialize(bool isUpdating)
{
var path = ModelNodePath.GetPath(((ObservableModelNode)Root).sourceNode, targetNode);
if (!path.IsValid)
{
throw new InvalidOperationException("Unable to retrieve the path of the given model node.");
}
foreach (var command in targetNode.Commands)
{
var commandWrapper = new ModelNodeCommandWrapper(ServiceProvider, command, Path, Owner.Identifier, path, Owner.ModelContainer, Owner.GetDirtiableViewModels(this));
AddCommand(commandWrapper);
}
if (!isPrimitive)
{
GenerateChildren(targetNode, isUpdating);
}
isInitialized = true;
if (Owner.ObservableViewModelService != null)
{
var data = Owner.ObservableViewModelService.RequestAssociatedData(this, isUpdating);
SetValue(ref associatedData, data, "AssociatedData");
}
CheckDynamicMemberConsistency();
}
/// <summary>
/// Initializes a new instance of the <see cref="ObservableModelNode"/> class.
/// </summary>
/// <param name="ownerViewModel">The <see cref="ObservableViewModel"/> that owns the new <see cref="ObservableModelNode"/>.</param>
/// <param name="baseName">The base name of this node. Can be null if <see cref="index"/> is not. If so a name will be automatically generated from the index.</param>
/// <param name="isPrimitive">Indicate whether this node should be considered as a primitive node.</param>
/// <param name="modelNode">The model node bound to the new <see cref="ObservableModelNode"/>.</param>
/// <param name="modelNodePath">The <see cref="ModelNodePath"/> corresponding to the given <see cref="modelNode"/>.</param>
/// <param name="index">The index of this content in the model node, when this node represent an item of a collection. <c>null</c> must be passed otherwise</param>
protected ObservableModelNode(ObservableViewModel ownerViewModel, string baseName, bool isPrimitive, IModelNode modelNode, ModelNodePath modelNodePath, object index = null)
: base(ownerViewModel, baseName, index)
{
if (modelNode == null)
{
throw new ArgumentNullException("modelNode");
}
if (baseName == null && index == null)
{
throw new ArgumentException("baseName and index can't be both null.");
}
this.isPrimitive = isPrimitive;
SourceNode = modelNode;
// By default we will always combine items of list of primitive items.
CombineMode = index != null && isPrimitive ? CombineMode.AlwaysCombine : CombineMode.CombineOnlyForAll;
targetNode = GetTargetNode(modelNode, index);
SourceNodePath = modelNodePath;
// Override display name if available
if (index == null)
{
var memberDescriptor = GetMemberDescriptor() as MemberDescriptorBase;
if (memberDescriptor != null)
{
var displayAttribute = TypeDescriptorFactory.Default.AttributeRegistry.GetAttribute <DisplayAttribute>(memberDescriptor.MemberInfo);
if (displayAttribute != null && !string.IsNullOrEmpty(displayAttribute.Name))
{
DisplayName = displayAttribute.Name;
}
}
}
}
internal void RegisterAction(string displayName, ModelNodePath nodePath, string observableNodePath, object index, IReadOnlyCollection <IDirtiableViewModel> dirtiables, object newValue, object previousValue)
{
singleNodeActionRegistered = true;
var actionItem = new ValueChangedActionItem(displayName, observableViewModelService, nodePath, observableNodePath, Identifier, index, dirtiables, modelContainer, previousValue);
ActionStack.Add(actionItem);
NotifyNodeChanged(observableNodePath);
}
protected override void FreezeMembers()
{
service = null;
NodePath = null;
ObservableNodePath = null;
Index = null;
PreviousValue = null;
}
protected override void FreezeMembers()
{
service = null;
modelContainer = null;
nodePath = null;
observableNodePath = null;
index = null;
}
private void GenerateChildren(IModelNode modelNode, ModelNodePath modelNodePath, bool isUpdating)
{
if (modelNode.Content.IsReference)
{
var referenceEnumerable = modelNode.Content.Reference as ReferenceEnumerable;
if (referenceEnumerable != null)
{
foreach (var reference in referenceEnumerable)
{
// The type might be a boxed primitive type, such as float, if the collection has object as generic argument.
// In this case, we must set the actual type to have type converter working, since they usually can't convert
// a boxed float to double for example. Otherwise, we don't want to have a node type that is value-dependent.
var type = reference.TargetNode != null && reference.TargetNode.Content.IsPrimitive ? reference.TargetNode.Content.Type : reference.Type;
var observableNode = Create(Owner, null, false, this, modelNode, modelNodePath, type, reference.Index);
observableNode.Initialize(isUpdating);
AddChild(observableNode);
}
}
}
else
{
var dictionary = modelNode.Content.Descriptor as DictionaryDescriptor;
var list = modelNode.Content.Descriptor as CollectionDescriptor;
if (dictionary != null && modelNode.Content.Value != null)
{
// Dictionary of primitive objects
foreach (var key in dictionary.GetKeys(modelNode.Content.Value))
{
var observableChild = Create(Owner, null, true, this, modelNode, modelNodePath, dictionary.ValueType, key);
observableChild.Initialize(isUpdating);
AddChild(observableChild);
}
}
else if (list != null && modelNode.Content.Value != null)
{
// List of primitive objects
for (int i = 0; i < list.GetCollectionCount(modelNode.Content.Value); ++i)
{
var observableChild = Create(Owner, null, true, this, modelNode, modelNodePath, list.ElementType, i);
observableChild.Initialize(isUpdating);
AddChild(observableChild);
}
}
else
{
// Single non-reference primitive object
foreach (var child in modelNode.Children)
{
var childPath = ModelNodePath.GetChildPath(modelNodePath, modelNode, child);
var observableChild = Create(Owner, child.Name, child.Content.IsPrimitive, this, child, childPath, child.Content.Type, null);
observableChild.Initialize(isUpdating);
AddChild(observableChild);
}
}
}
}
public ValueChangedActionItem(string name, ObservableViewModelService service, ModelNodePath nodePath, string observableNodePath, ObservableViewModelIdentifier identifier, object index, IEnumerable <IDirtiableViewModel> dirtiables, object previousValue)
: base(name, dirtiables)
{
if (service == null)
{
throw new ArgumentNullException("service");
}
if (!nodePath.IsValid)
{
throw new InvalidOperationException("Unable to retrieve the path of the modified node.");
}
this.service = service;
this.identifier = identifier;
this.PreviousValue = previousValue;
NodePath = nodePath;
Index = index;
ObservableNodePath = observableNodePath;
}
public ModelNodeCommandWrapper(IViewModelServiceProvider serviceProvider, INodeCommand nodeCommand, string observableNodePath, ObservableViewModelIdentifier identifier, ModelNodePath nodePath, ModelContainer modelContainer, IEnumerable <IDirtiableViewModel> dirtiables)
: base(serviceProvider, dirtiables)
{
if (nodeCommand == null)
{
throw new ArgumentNullException("nodeCommand");
}
if (modelContainer == null)
{
throw new ArgumentNullException("modelContainer");
}
this.identifier = identifier;
this.nodePath = nodePath;
this.modelContainer = modelContainer;
this.nodeCommand = nodeCommand;
service = serviceProvider.Get <ObservableViewModelService>();
ObservableNodePath = observableNodePath;
}
public ModelNodeCommandWrapper(IViewModelServiceProvider serviceProvider, INodeCommand nodeCommand, string observableNodePath, ObservableViewModel owner, ModelNodePath nodePath, IEnumerable <IDirtiableViewModel> dirtiables)
: base(serviceProvider, dirtiables)
{
if (nodeCommand == null)
{
throw new ArgumentNullException(nameof(nodeCommand));
}
if (owner == null)
{
throw new ArgumentNullException(nameof(owner));
}
NodePath = nodePath;
// Note: the owner should not be stored in the command because we want it to be garbage collectable
Identifier = owner.Identifier;
ModelContainer = owner.ModelContainer;
NodeCommand = nodeCommand;
Service = serviceProvider.Get <ObservableViewModelService>();
ObservableNodePath = observableNodePath;
}
/// <summary>
/// Initializes a new instance of the <see cref="ObservableModelNode"/> class.
/// </summary>
/// <param name="ownerViewModel">The <see cref="ObservableViewModel"/> that owns the new <see cref="ObservableModelNode"/>.</param>
/// <param name="baseName">The base name of this node. Can be null if <see cref="index"/> is not. If so a name will be automatically generated from the index.</param>
/// <param name="isPrimitive">Indicate whether this node should be considered as a primitive node.</param>
/// <param name="parentNode">The parent node of the new <see cref="ObservableModelNode"/>, or <c>null</c> if the node being created is the root node of the view model.</param>
/// <param name="modelNode">The model node bound to the new <see cref="ObservableModelNode"/>.</param>
/// <param name="modelNodePath">The <see cref="ModelNodePath"/> corresponding to the given <see cref="modelNode"/>.</param>
/// <param name="index">The index of this content in the model node, when this node represent an item of a collection. <c>null</c> must be passed otherwise</param>
protected ObservableModelNode(ObservableViewModel ownerViewModel, string baseName, bool isPrimitive, SingleObservableNode parentNode, IModelNode modelNode, ModelNodePath modelNodePath, object index = null)
: base(ownerViewModel, baseName, parentNode, index)
{
if (modelNode == null)
{
throw new ArgumentNullException("modelNode");
}
if (baseName == null && index == null)
{
throw new ArgumentException("baseName and index can't be both null.");
}
this.isPrimitive = isPrimitive;
sourceNode = modelNode;
// By default we will always combine items of list of primitive items.
CombineMode = index != null && isPrimitive ? CombineMode.AlwaysCombine : CombineMode.CombineOnlyForAll;
targetNode = GetTargetNode(modelNode, index);
SourceNodePath = modelNodePath;
}
/// <summary>
/// Retrieves a <see cref="ModelNodePath"/> object corresponding to the path of the model node contained in this <see cref="ObservableModelNode"/>.
/// </summary>
/// <returns>A <see cref="ModelNodePath"/> object corresponding to the path of the model node contained in this <see cref="ObservableModelNode"/>.</returns>
public ModelNodePath GetModelNodePath()
{
return(ModelNodePath.GetPath(((ObservableModelNode)Root).sourceNode, sourceNode));
}
/// <summary>
/// Create an <see cref="ObservableModelNode{T}"/> that matches the given content type.
/// </summary>
/// <param name="ownerViewModel">The <see cref="ObservableViewModel"/> that owns the new <see cref="ObservableModelNode"/>.</param>
/// <param name="baseName">The base name of this node. Can be null if <see cref="index"/> is not. If so a name will be automatically generated from the index.</param>
/// <param name="isPrimitive">Indicate whether this node should be considered as a primitive node.</param>
/// <param name="modelNode">The model node bound to the new <see cref="ObservableModelNode"/>.</param>
/// <param name="modelNodePath">The <see cref="ModelNodePath"/> corresponding to the given node.</param>
/// <param name="contentType">The type of content contained by the new <see cref="ObservableModelNode"/>.</param>
/// <param name="index">The index of this content in the model node, when this node represent an item of a collection. <c>null</c> must be passed otherwise</param>
/// <returns>A new instance of <see cref="ObservableModelNode{T}"/> instanced with the given content type as generic argument.</returns>
internal static ObservableModelNode Create(ObservableViewModel ownerViewModel, string baseName, bool isPrimitive, IModelNode modelNode, ModelNodePath modelNodePath, Type contentType, object index)
{
var node = (ObservableModelNode)Activator.CreateInstance(typeof(ObservableModelNode <>).MakeGenericType(contentType), ownerViewModel, baseName, isPrimitive, modelNode, modelNodePath, index);
return(node);
}
private void GenerateChildren(IModelNode modelNode, ModelNodePath modelNodePath)
{
if (modelNode.Content.IsReference && modelNode.Content.ShouldProcessReference)
{
var referenceEnumerable = modelNode.Content.Reference as ReferenceEnumerable;
if (referenceEnumerable != null)
{
// If the reference should not be processed, we still need to create an observable node for each entry of the enumerable.
// These observable nodes will have the same source node that their parent so we use this information to prevent
// the infinite recursion that could occur due to the fact that these child nodes will have the same model nodes (like primitive types)
// while holding an enumerable reference.
//if (modelNode.Content.ShouldProcessReference || ModelNodeParent.sourceNode != modelNode)
{
foreach (var reference in referenceEnumerable)
{
// The type might be a boxed primitive type, such as float, if the collection has object as generic argument.
// In this case, we must set the actual type to have type converter working, since they usually can't convert
// a boxed float to double for example. Otherwise, we don't want to have a node type that is value-dependent.
var type = reference.TargetNode != null && reference.TargetNode.Content.IsPrimitive ? reference.TargetNode.Content.Type : reference.Type;
var observableNode = Owner.ObservableViewModelService.ObservableNodeFactory(Owner, null, false, modelNode, modelNodePath, type, reference.Index);
AddChild(observableNode);
observableNode.Initialize();
}
}
}
}
else
{
var dictionary = modelNode.Content.Descriptor as DictionaryDescriptor;
var list = modelNode.Content.Descriptor as CollectionDescriptor;
if (dictionary != null && modelNode.Content.Value != null)
{
// Dictionary of primitive objects
foreach (var key in dictionary.GetKeys(modelNode.Content.Value))
{
var observableChild = Owner.ObservableViewModelService.ObservableNodeFactory(Owner, null, true, modelNode, modelNodePath, dictionary.ValueType, key);
AddChild(observableChild);
observableChild.Initialize();
}
}
else if (list != null && modelNode.Content.Value != null)
{
// List of primitive objects
for (int i = 0; i < list.GetCollectionCount(modelNode.Content.Value); ++i)
{
var observableChild = Owner.ObservableViewModelService.ObservableNodeFactory(Owner, null, true, modelNode, modelNodePath, list.ElementType, i);
AddChild(observableChild);
observableChild.Initialize();
}
}
else
{
// Single non-reference primitive object
foreach (var child in modelNode.Children)
{
var childPath = modelNodePath.GetChildPath(modelNode, child);
var observableChild = Owner.ObservableViewModelService.ObservableNodeFactory(Owner, child.Name, child.Content.IsPrimitive, child, childPath, child.Content.Type, null);
AddChild(observableChild);
observableChild.Initialize();
}
}
}
}
private static ObservableModelNode DefaultCreateNode(ObservableViewModel viewModel, string baseName, bool isPrimitive, IModelNode modelNode, ModelNodePath modelNodePath, Type contentType, object index)
{
return(ObservableModelNode.Create(viewModel, baseName, isPrimitive, modelNode, modelNodePath, contentType, index));
}
