| /******************************************************************************* |
| * Copyright (c) 2006, 2016 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Martin Karpisek <martin.karpisek@gmail.com> - Bug 507831 |
| *******************************************************************************/ |
| package org.eclipse.pde.internal.ui.editor; |
| |
| import java.util.*; |
| import org.eclipse.jface.text.*; |
| import org.eclipse.jface.text.source.Annotation; |
| import org.eclipse.jface.text.source.projection.ProjectionAnnotation; |
| import org.eclipse.jface.text.source.projection.ProjectionAnnotationModel; |
| import org.eclipse.pde.core.IModelChangedEvent; |
| import org.eclipse.pde.core.IModelChangedListener; |
| import org.eclipse.pde.internal.core.text.IEditingModel; |
| |
| public abstract class AbstractFoldingStructureProvider implements IFoldingStructureProvider, IModelChangedListener { |
| |
| private PDESourcePage fEditor; |
| private IEditingModel fModel; |
| |
| public AbstractFoldingStructureProvider(PDESourcePage editor, IEditingModel model) { |
| this.fEditor = editor; |
| this.fModel = model; |
| } |
| |
| public void update() { |
| ProjectionAnnotationModel annotationModel = fEditor.getAdapter(ProjectionAnnotationModel.class); |
| if (annotationModel == null) |
| return; |
| |
| Set<Position> currentRegions = new HashSet<>(); |
| try { |
| addFoldingRegions(currentRegions, fModel); |
| updateFoldingRegions(annotationModel, currentRegions); |
| } catch (BadLocationException e) { |
| } |
| } |
| |
| public void updateFoldingRegions(ProjectionAnnotationModel model, Set<Position> currentRegions) { |
| Annotation[] deletions = computeDifferences(model, currentRegions); |
| |
| Map<ProjectionAnnotation, Position> additionsMap = new HashMap<>(); |
| for (Position position : currentRegions) { |
| additionsMap.put(new ProjectionAnnotation(false), position); |
| } |
| |
| if ((deletions.length != 0 || !additionsMap.isEmpty())) { |
| model.modifyAnnotations(deletions, additionsMap, new Annotation[] {}); |
| } |
| } |
| |
| private Annotation[] computeDifferences(ProjectionAnnotationModel model, Set<Position> additions) { |
| List<Object> deletions = new ArrayList<>(); |
| for (Iterator<Annotation> iter = model.getAnnotationIterator(); iter.hasNext();) { |
| Annotation annotation = iter.next(); |
| if (annotation instanceof ProjectionAnnotation) { |
| Position position = model.getPosition(annotation); |
| if (additions.contains(position)) { |
| additions.remove(position); |
| } else { |
| deletions.add(annotation); |
| } |
| } |
| } |
| return deletions.toArray(new Annotation[deletions.size()]); |
| } |
| |
| @Override |
| public void initialize() { |
| update(); |
| } |
| |
| @Override |
| public void modelChanged(IModelChangedEvent event) { |
| update(); |
| } |
| |
| @Override |
| public void reconciled(IDocument document) { |
| update(); |
| } |
| |
| } |