/// <summary>
/// handle the case when an anchor is modified
/// </summary>
/// <param name="annotation">the annotation which anchor was affected</param>
/// <param name="anchor">the modified anchor</param>
/// <returns></returns>
private AttachedAnnotationChangedEventArgs AnchorModified(Annotation annotation, AnnotationResource anchor)
{
Invariant.Assert(annotation != null && anchor != null, "Parameter 'annotation' or 'anchor' is null.");
AttachedAnnotationChangedEventArgs args = null;
AttachmentLevel newAttachmentLevel;
bool previouslyAttached = false;
// anchor has changed, need to find new attached anchor
object newAttachedAnchor = FindAttachedAnchor(anchor, out newAttachmentLevel);
// Since we will be modifying this collection, we make a copy of it to iterate on
IList<IAttachedAnnotation> annotations = _annotationMap.GetAttachedAnnotations(annotation.Id);
IAttachedAnnotation[] list = new IAttachedAnnotation[annotations.Count];
annotations.CopyTo(list, 0);
foreach (IAttachedAnnotation attachedAnnotation in list)
{
if (attachedAnnotation.Anchor == anchor)
{
previouslyAttached = true;
if (newAttachmentLevel != AttachmentLevel.Unresolved)
{
Invariant.Assert(newAttachedAnchor != null, "AttachedAnnotation with AttachmentLevel != Unresolved should have non-null AttachedAnchor.");
object oldAttachedAnchor = attachedAnnotation.AttachedAnchor;
AttachmentLevel oldAttachmentLevel = attachedAnnotation.AttachmentLevel;
((AttachedAnnotation)attachedAnnotation).Update(newAttachedAnchor, newAttachmentLevel, null);
// Update the full anchor
FullyResolveAnchor(attachedAnnotation);
// No need to update map - we just changed the AttachedAnnotation in-place
args = AttachedAnnotationChangedEventArgs.Modified(attachedAnnotation, oldAttachedAnchor, oldAttachmentLevel);
}
else
{
// the new modified anchor doesn't resolve
// we need to delete the original attached annotation
DoRemoveAttachedAnnotation(attachedAnnotation);
args = AttachedAnnotationChangedEventArgs.Deleted(attachedAnnotation);
}
break;
}
}
// If it wasn't previously attached, but can be resolved now we create an AttachedAnnotation
if (!previouslyAttached && newAttachmentLevel != AttachmentLevel.Unresolved && newAttachmentLevel != AttachmentLevel.Incomplete)
{
Invariant.Assert(newAttachedAnchor != null, "AttachedAnnotation with AttachmentLevel != Unresolved should have non-null AttachedAnchor.");
AttachedAnnotation attachedAnnotation = new AttachedAnnotation(
this.LocatorManager,
annotation,
anchor,
newAttachedAnchor,
newAttachmentLevel);
DoAddAttachedAnnotation(attachedAnnotation);
args = AttachedAnnotationChangedEventArgs.Added(attachedAnnotation);
}
return args;
}
/// <summary>
/// handle the case when a new anchor is added to the annotation
/// </summary>
/// <param name="annotation">the annotation which anchor was affected</param>
/// <param name="anchor">the deleted anchor</param>
/// <returns></returns>
private AttachedAnnotationChangedEventArgs AnchorAdded(Annotation annotation, AnnotationResource anchor)
{
Invariant.Assert(annotation != null && anchor != null, "Parameter 'annotation' or 'anchor' is null.");
AttachedAnnotationChangedEventArgs args = null;
AttachmentLevel attachmentLevel;
object attachedAnchor = FindAttachedAnchor(anchor, out attachmentLevel);
if (attachmentLevel != AttachmentLevel.Unresolved && attachmentLevel != AttachmentLevel.Incomplete)
{
Invariant.Assert(attachedAnchor != null, "Must have a valid attached anchor.");
AttachedAnnotation attachedAnnotation = new AttachedAnnotation(
this.LocatorManager,
annotation,
anchor,
attachedAnchor,
attachmentLevel);
DoAddAttachedAnnotation(attachedAnnotation);
args = AttachedAnnotationChangedEventArgs.Added(attachedAnnotation);
}
return args;
}