| /******************************************************************************* |
| * Copyright (c) 2000, 2015 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jface.text.source; |
| |
| |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.eclipse.jface.text.Position; |
| |
| |
| /** |
| * Specification of changes applied to annotation models. The event carries the |
| * changed annotation model as well as added, removed, and modified annotations. |
| * <p> |
| * An event can be sealed. Afterwards it can not be modified. Thus, the normal |
| * process is that an empty event is created, filled with the changed |
| * information, and before it is sent to the listeners, the event is sealed. |
| * |
| * @see org.eclipse.jface.text.source.IAnnotationModel |
| * @see org.eclipse.jface.text.source.IAnnotationModelListenerExtension |
| * @since 2.0 |
| */ |
| public class AnnotationModelEvent { |
| |
| /** The model this event refers to. */ |
| private IAnnotationModel fAnnotationModel; |
| /** |
| * The added annotations. |
| * @since 3.0 |
| */ |
| private Set<Annotation> fAddedAnnotations= new HashSet<>(); |
| /** |
| * The removed annotations. |
| * @since 3.0 |
| */ |
| private Map<Annotation, Position> fRemovedAnnotations= new HashMap<>(); |
| /** |
| * The changed annotations. |
| * @since 3.0 |
| */ |
| private Set<Annotation> fChangedAnnotations= new HashSet<>(); |
| /** |
| * Indicates that this event does not contain detailed information. |
| * @since 3.0 |
| */ |
| private boolean fIsWorldChange; |
| /** |
| * The modification stamp. |
| * @since 3.0 |
| */ |
| private Object fModificationStamp; |
| |
| /** |
| * Creates a new annotation model event for the given model. |
| * |
| * @param model the model |
| */ |
| public AnnotationModelEvent(IAnnotationModel model) { |
| this(model, true); |
| } |
| |
| /** |
| * Creates a new annotation model event for the given model. |
| * |
| * @param model the model |
| * @param isWorldChange <code>true</code> if world change |
| * @since 3.0 |
| */ |
| public AnnotationModelEvent(IAnnotationModel model, boolean isWorldChange) { |
| fAnnotationModel= model; |
| fIsWorldChange= isWorldChange; |
| } |
| |
| /** |
| * Returns the model this event refers to. |
| * |
| * @return the model this events belongs to |
| */ |
| public IAnnotationModel getAnnotationModel() { |
| return fAnnotationModel; |
| } |
| |
| /** |
| * Adds the given annotation to the set of annotations that are reported as |
| * being added from the model. If this event is considered a world change, |
| * it is no longer so after this method has successfully finished. |
| * |
| * @param annotation the added annotation |
| * @since 3.0 |
| */ |
| public void annotationAdded(Annotation annotation) { |
| fAddedAnnotations.add(annotation); |
| fIsWorldChange= false; |
| } |
| |
| /** |
| * Returns the added annotations. |
| * |
| * @return the added annotations |
| * @since 3.0 |
| */ |
| public Annotation[] getAddedAnnotations() { |
| int size= fAddedAnnotations.size(); |
| Annotation[] added= new Annotation[size]; |
| fAddedAnnotations.toArray(added); |
| return added; |
| } |
| |
| /** |
| * Adds the given annotation to the set of annotations that are reported as |
| * being removed from the model. If this event is considered a world |
| * change, it is no longer so after this method has successfully finished. |
| * |
| * @param annotation the removed annotation |
| * @since 3.0 |
| */ |
| public void annotationRemoved(Annotation annotation) { |
| annotationRemoved(annotation, null); |
| } |
| |
| /** |
| * Adds the given annotation to the set of annotations that are reported as |
| * being removed from the model. If this event is considered a world |
| * change, it is no longer so after this method has successfully finished. |
| * |
| * @param annotation the removed annotation |
| * @param position the position of the removed annotation |
| * @since 3.0 |
| */ |
| public void annotationRemoved(Annotation annotation, Position position) { |
| fRemovedAnnotations.put(annotation, position); |
| fIsWorldChange= false; |
| } |
| |
| /** |
| * Returns the removed annotations. |
| * |
| * @return the removed annotations |
| * @since 3.0 |
| */ |
| public Annotation[] getRemovedAnnotations() { |
| int size= fRemovedAnnotations.size(); |
| Annotation[] removed= new Annotation[size]; |
| fRemovedAnnotations.keySet().toArray(removed); |
| return removed; |
| } |
| |
| /** |
| * Returns the position of the removed annotation at that point in time |
| * when the annotation has been removed. |
| * |
| * @param annotation the removed annotation |
| * @return the position of the removed annotation or <code>null</code> |
| * @since 3.0 |
| */ |
| public Position getPositionOfRemovedAnnotation(Annotation annotation) { |
| return fRemovedAnnotations.get(annotation); |
| } |
| |
| /** |
| * Adds the given annotation to the set of annotations that are reported as |
| * being changed from the model. If this event is considered a world |
| * change, it is no longer so after this method has successfully finished. |
| * |
| * @param annotation the changed annotation |
| * @since 3.0 |
| */ |
| public void annotationChanged(Annotation annotation) { |
| fChangedAnnotations.add(annotation); |
| fIsWorldChange= false; |
| } |
| |
| /** |
| * Returns the changed annotations. |
| * |
| * @return the changed annotations |
| * @since 3.0 |
| */ |
| public Annotation[] getChangedAnnotations() { |
| int size= fChangedAnnotations.size(); |
| Annotation[] changed= new Annotation[size]; |
| fChangedAnnotations.toArray(changed); |
| return changed; |
| } |
| |
| /** |
| * Returns whether this annotation model event is empty or not. If this |
| * event represents a world change, this method returns <code>false</code> |
| * although the event does not carry any added, removed, or changed |
| * annotations. |
| * |
| * @return <code>true</code> if this event is empty |
| * @since 3.0 |
| */ |
| public boolean isEmpty() { |
| return !fIsWorldChange && fAddedAnnotations.isEmpty() && fRemovedAnnotations.isEmpty() && fChangedAnnotations.isEmpty(); |
| } |
| |
| /** |
| * Returns whether this annotation model events contains detailed |
| * information about the modifications applied to the event annotation |
| * model or whether it represents a world change. I.e. everything in the |
| * model might have changed. |
| * |
| * @return <code>true</code> if world change, <code>false</code> otherwise |
| * @since 3.0 |
| */ |
| public boolean isWorldChange() { |
| return fIsWorldChange; |
| } |
| |
| /** |
| * Marks this event as world change according to the given flag. |
| * |
| * @param isWorldChange <code>true</code> if this event is a world change, <code>false</code> otherwise |
| * @since 3.0 |
| */ |
| void markWorldChange(boolean isWorldChange) { |
| fIsWorldChange= isWorldChange; |
| } |
| |
| /** |
| * Returns whether this annotation model event is still valid. |
| * |
| * @return <code>true</code> if this event is still valid, <code>false</code> otherwise |
| * @since 3.0 |
| */ |
| public boolean isValid() { |
| if (fModificationStamp != null && fAnnotationModel instanceof IAnnotationModelExtension) { |
| IAnnotationModelExtension extension= (IAnnotationModelExtension) fAnnotationModel; |
| return fModificationStamp == extension.getModificationStamp(); |
| } |
| return true; |
| } |
| |
| /** |
| * Seals this event. Any direct modification to the annotation model after the event has been sealed |
| * invalidates this event. |
| * |
| * @since 3.0 |
| */ |
| public void markSealed() { |
| if (fAnnotationModel instanceof IAnnotationModelExtension) { |
| IAnnotationModelExtension extension= (IAnnotationModelExtension) fAnnotationModel; |
| fModificationStamp= extension.getModificationStamp(); |
| } |
| } |
| } |