/// <summary>
/// Raises the Bubbled Change event for the given collection change
/// </summary>
/// <param name="propertyName">The name of the property that has changed</param>
/// <param name="e">The event data</param>
protected void OnCollectionChanged(string propertyName, NotifyCollectionChangedEventArgs e, Lazy <ITypedElement> feature = null)
{
if (!IsFlagSet(ModelElementFlag.Deleting))
{
OnBubbledChange(BubbledChangeEventArgs.CollectionChanged(this, propertyName, e, IsFlagSet(ModelElementFlag.RequireUris), feature));
}
}
internal void OnUriChanged(Uri oldUri)
{
var e = new UriChangedEventArgs(oldUri);
UriChanged?.Invoke(this, e);
OnBubbledChange(BubbledChangeEventArgs.UriChanged(this, e));
}
/// <summary>
/// Raises the Bubbled Change event for the given upcoming collection change
/// </summary>
/// <param name="propertyName">The name of the property that has changed</param>
/// <param name="e">The event data</param>
protected void OnCollectionChanging(string propertyName, NotifyCollectionChangingEventArgs e)
{
if (!IsFlagSet(ModelElementFlag.Deleting))
{
OnBubbledChange(BubbledChangeEventArgs.CollectionChanging(this, propertyName, e, IsFlagSet(ModelElementFlag.RequireUris)));
}
}
/// <summary>
/// Gets called when a new model element is added as a child of the current model element
/// </summary>
/// <param name="child">The child element</param>
/// <remarks>This method is not called if an existing model element is moved in the composition hierarchy</remarks>
protected virtual void OnChildCreated(IModelElement child)
{
if (bubbledChange != null || IsFlagSet(ModelElementFlag.RaiseBubbledChanges))
{
OnBubbledChange(BubbledChangeEventArgs.ElementCreated(child, new UriChangedEventArgs(null)));
}
}
/// <summary>
/// Gets called when the PropertyChanging event is fired
/// </summary>
/// <param name="propertyName">The name of the changed property</param>
protected virtual void OnPropertyChanging(string propertyName, ValueChangedEventArgs e = null)
{
PropertyChanging?.Invoke(this, new PropertyChangingEventArgs(propertyName));
if (!IsFlagSet(ModelElementFlag.Deleting))
{
OnBubbledChange(BubbledChangeEventArgs.PropertyChanging(this, propertyName, e, IsFlagSet(ModelElementFlag.RequireUris)));
}
}
protected override void OnBubbledChange(BubbledChangeEventArgs e)
{
base.OnBubbledChange(e);
if (e.ChangeType == ChangeType.UnlockRequest)
{
UnlockRequested?.Invoke(this, e.OriginalEventArgs as UnlockEventArgs);
}
}
/// <summary>
/// Gets called when the PropertyChanged event is fired
/// </summary>
/// <param name="propertyName">The name of the changed property</param>
/// <param name="valueChangedEvent">The original event data</param>
protected virtual void OnPropertyChanged(string propertyName, ValueChangedEventArgs valueChangedEvent, Lazy <ITypedElement> feature = null)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
if (!IsFlagSet(ModelElementFlag.Deleting))
{
OnBubbledChange(BubbledChangeEventArgs.PropertyChanged(this, propertyName, valueChangedEvent, IsFlagSet(ModelElementFlag.RequireUris), feature));
}
}
/// <summary>
/// Fires the BubbledChange event
/// </summary>
/// <param name="e">The event data</param>
protected virtual void OnBubbledChange(BubbledChangeEventArgs e)
{
bubbledChange?.Invoke(this, e);
if (IsFlagSet(ModelElementFlag.RaiseBubbledChanges) || e.ChangeType == ChangeType.UnlockRequest)
{
var parent = Parent as ModelElement;
if (parent != null)
{
parent.OnBubbledChange(e);
}
}
}
/// <summary>
/// Deletes the current model element
/// </summary>
public virtual void Delete()
{
if (!IsFlagSet(ModelElementFlag.Deleting))
{
SetFlag(ModelElementFlag.Deleting);
// do not create event args when nobody listens
if (IsFlagSet(ModelElementFlag.RaiseBubbledChanges) || Deleted != null || Deleting != null)
{
Uri originalAbsoluteUri = null;
if (IsFlagSet(ModelElementFlag.RequireUris))
{
originalAbsoluteUri = AbsoluteUri;
}
var e = new UriChangedEventArgs(originalAbsoluteUri);
OnDeleting(e);
OnDeleted(e);
// only bubble deletion for deleted root
OnBubbledChange(BubbledChangeEventArgs.ElementDeleted(this, e));
}
SetParent(null);
}
}
/// <summary>
/// Tries to unlock the current model element in order to make changes possible
/// </summary>
/// <returns>True, if unlocking the model element succeeds, otherwise False</returns>
public bool TryUnlock()
{
if (IsFlagSet(ModelElementFlag.Locked))
{
if (IsFlagSet(ModelElementFlag.Frozen))
{
return(false);
}
var unlockEventArgs = new UnlockEventArgs(this);
OnBubbledChange(BubbledChangeEventArgs.Unlock(this, unlockEventArgs));
if (unlockEventArgs.MayUnlock)
{
UnlockInternal();
}
else
{
return(false);
}
}
return(true);
}
/// <summary>
/// Gets called when the model element gets deleted
/// </summary>
/// <param name="e">The event data</param>
protected virtual void OnDeleted(UriChangedEventArgs e)
{
foreach (var child in Children.Reverse())
{
var childME = child as ModelElement;
if (childME != null)
{
Uri oldChildUri = null;
if (e.OldUri != null)
{
var uriBuilder = new UriBuilder(e.OldUri);
uriBuilder.Fragment = uriBuilder.Fragment.Substring(1) + '/' + childME.CreateUriWithFragment(null, false, this).OriginalString;
oldChildUri = uriBuilder.Uri;
}
var args = new UriChangedEventArgs(oldChildUri);
childME.OnDeleting(args);
childME.OnDeleted(args);
}
}
Deleted?.Invoke(this, e);
OnBubbledChange(BubbledChangeEventArgs.ElementDeleted(this, e));
UnsetFlag(ModelElementFlag.Deleting);
}
public override void PropagateBubbledChange(BubbledChangeEventArgs e)
{
BubbledChange?.Invoke(this, e);
}
/// <summary>
/// Sets the parent for the current model element to the given element
/// </summary>
/// <param name="newParent">The new parent for the given element</param>
private void SetParent(IModelElement newParent)
{
Unlock();
var newParentME = newParent as ModelElement;
if (newParentME != parent)
{
var oldParent = parent;
if (newParentME != null)
{
OnParentChanging(newParentME, parent);
Uri oldUri = null;
if (IsFlagSet(ModelElementFlag.RequireUris))
{
oldUri = AbsoluteUri;
}
parent = newParentME;
var newModel = newParentME.Model;
var oldModel = oldParent != null ? oldParent.Model : null;
if (oldParent != null)
{
if (EnforceModels && oldModel != null && newModel == null)
{
oldModel.RootElements.Add(newParentME);
}
}
if (oldParent != null && oldParent.IsFlagSet(ModelElementFlag.RequireUris) && oldUri != null)
{
oldParent.OnBubbledChange(BubbledChangeEventArgs.UriChanged(this, new UriChangedEventArgs(oldUri)));
}
else if (bubbledChange == null)
{
UnregisterBubbledChangeRequest();
}
if (newParentME.IsFlagSet(ModelElementFlag.RaiseBubbledChanges) || newParentME.bubbledChange != null)
{
RequestBubbledChanges();
}
if (newParentME.IsFlagSet(ModelElementFlag.RequireUris))
{
RequestUris();
OnUriChanged(oldUri);
}
newParentME.OnChildCreated(this);
if (newModel != oldModel)
{
PropagateNewModel(newModel, oldModel, this);
}
OnParentChanged(newParentME, oldParent);
}
else
{
parent = null;
var oldModel = oldParent.Model;
if (bubbledChange == null)
{
UnregisterBubbledChangeRequest();
}
if (oldModel != null)
{
PropagateNewModel(null, oldModel, this);
}
OnParentChanged(null, oldParent);
}
}
}
/// <summary>
/// Gets called when the model element gets deleted
/// </summary>
/// <param name="e">The event data</param>
protected virtual void OnDeleted(EventArgs e, Uri originalAbsoluteUri)
{
Deleted?.Invoke(this, e);
OnBubbledChange(BubbledChangeEventArgs.ElementDeleted(this, originalAbsoluteUri));
}
/// <summary>
/// Gets called when a new model element is added as a child of the current model element
/// </summary>
/// <param name="child">The child element</param>
/// <remarks>This method is not called if an existing model element is moved in the composition hierarchy</remarks>
protected virtual void OnChildCreated(IModelElement child)
{
OnBubbledChange(BubbledChangeEventArgs.ElementCreated(child, new UriChangedEventArgs(null)));
}
public virtual void PropagateBubbledChange(BubbledChangeEventArgs e)
{
Parent.PropagateBubbledChange(e);
}
private void Element_BubbledChange(object sender, BubbledChangeEventArgs e)
{
PropagateBubbledChange(e);
}
private void Repository_BubbledChange(object sender, BubbledChangeEventArgs e)
{
Parent.PropagateBubbledChange(e);
}
/// <summary>
/// Gets called when a new model element is added as a child of the current model element
/// </summary>
/// <param name="child">The child element</param>
/// <remarks>This method is not called if an existing model element is moved in the composition hierarchy</remarks>
protected virtual void OnChildCreated(IModelElement child)
{
OnBubbledChange(BubbledChangeEventArgs.ElementCreated(child, IsFlagSet(ModelElementFlag.RequireUris)));
}
