| /******************************************************************************* |
| * Copyright (c) 2009 Borland Software Corporation |
| * |
| * 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: |
| * Borland Software Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.m2m.internal.qvt.oml.editor.ui; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.LinkedHashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.IRegion; |
| import org.eclipse.jface.text.ISynchronizable; |
| import org.eclipse.jface.text.Position; |
| import org.eclipse.jface.text.Region; |
| import org.eclipse.jface.text.source.Annotation; |
| import org.eclipse.jface.text.source.IAnnotationModel; |
| import org.eclipse.jface.text.source.projection.ProjectionAnnotation; |
| import org.eclipse.jface.text.source.projection.ProjectionAnnotationModel; |
| import org.eclipse.jface.text.source.projection.ProjectionViewer; |
| import org.eclipse.m2m.internal.qvt.oml.compiler.CompiledUnit; |
| import org.eclipse.m2m.internal.qvt.oml.cst.ClassifierDefCS; |
| import org.eclipse.m2m.internal.qvt.oml.cst.MappingMethodCS; |
| import org.eclipse.m2m.internal.qvt.oml.cst.MappingModuleCS; |
| import org.eclipse.m2m.internal.qvt.oml.cst.UnitCS; |
| import org.eclipse.ocl.cst.CSTNode; |
| |
| class FoldingStructureUpdater implements IQVTReconcilingListener { |
| |
| private Annotation[] myAnnotations = new Annotation[0]; |
| |
| private ProjectionViewer myViewer; |
| |
| |
| public FoldingStructureUpdater(ProjectionViewer viewer) { |
| if(viewer == null) { |
| throw new IllegalArgumentException(); |
| } |
| |
| myViewer = viewer; |
| } |
| |
| public void aboutToBeReconciled() { |
| // do nothing |
| } |
| |
| public void reconciled(CompiledUnit unit, IProgressMonitor monitor) { |
| if(monitor.isCanceled()) { |
| return; |
| } |
| |
| List<Position> newFoldingPositions = Collections.emptyList(); |
| if(unit != null) { |
| newFoldingPositions = getNewFoldingPositions(unit); |
| } |
| |
| if(monitor.isCanceled()) { |
| return; |
| } |
| |
| updateFoldingStructure(newFoldingPositions, monitor); |
| } |
| |
| private List<Position> getNewFoldingPositions(CompiledUnit compilationResult) { |
| ArrayList<Position> positions = new ArrayList<Position>(); |
| UnitCS unitCST = compilationResult.getUnitCST(); |
| addListPosition(unitCST.getImports(), positions); |
| addListPosition(unitCST.getModelTypes(), positions); |
| |
| for(MappingModuleCS mappingModuleCS : unitCST.getModules()) { |
| // commented out elements with mixed ordering |
| // WBN : to calculate groups of elements of the same kind |
| // addListPosition(mappingModuleCS.getImports(), positions); |
| // addListPosition(mappingModuleCS.getMetamodels(), positions); |
| // addListPosition(mappingModuleCS.getProperties(), positions); |
| // addListPosition(mappingModuleCS.getRenamings(), positions); |
| |
| for(ClassifierDefCS classifierDefCS : mappingModuleCS.getClassifierDefCS()) { |
| positions.add(createPosition(classifierDefCS.getStartOffset(), classifierDefCS.getEndOffset())); |
| } |
| |
| for (MappingMethodCS method : mappingModuleCS.getMethods()) { |
| positions.add(createPosition(method.getStartOffset(), method.getEndOffset())); |
| } |
| } |
| |
| return positions; |
| } |
| |
| public void updateFoldingStructure(List<Position> positions, IProgressMonitor monitor) { |
| if (myViewer == null || myViewer.getProjectionAnnotationModel() == null) { |
| return; |
| } |
| |
| ProjectionAnnotationModel model = myViewer.getProjectionAnnotationModel(); |
| |
| Map<Annotation, Position> newAnnotationMap = new LinkedHashMap<Annotation, Position>(); |
| for (Position position : positions) { |
| if(monitor.isCanceled()) { |
| return; |
| } |
| |
| Annotation annotation = new ProjectionAnnotation(); |
| newAnnotationMap.put(annotation, position); |
| } |
| |
| synchronized (getLockObject(model)) { |
| model.replaceAnnotations(myAnnotations, newAnnotationMap); |
| } |
| |
| myAnnotations = newAnnotationMap.keySet().toArray(new Annotation[newAnnotationMap.size()]); |
| } |
| |
| private void addListPosition(final List<? extends CSTNode> list, final List<Position> positionList) { |
| if (!list.isEmpty()) { |
| int start = getStart(list); |
| int end = getEnd(list); |
| if (start >= 0 && end >= start) { |
| positionList.add(createPosition(start, end)); |
| } |
| } |
| } |
| |
| private int getStart(final List<? extends CSTNode> list) { |
| int start = Integer.MAX_VALUE; |
| for (CSTNode element : list) { |
| if (element != null) { |
| start = Math.min(start, element.getStartOffset()); |
| } |
| } |
| return start; |
| } |
| |
| private int getEnd(final List<? extends CSTNode> list) { |
| int end = -1; |
| for (CSTNode element : list) { |
| if (element != null) { |
| end = Math.max(end, element.getEndOffset()); |
| } |
| } |
| return end; |
| } |
| |
| private QvtPosition createPosition(int start, int end) { |
| IRegion region = new Region(start, end - start); |
| IRegion normalized = alignRegion(region); |
| if (normalized != null) { |
| region = normalized; |
| } |
| return new QvtPosition(region.getOffset(), region.getLength()); |
| } |
| |
| /** |
| * Aligns <code>region</code> to start and end at a line offset. The |
| * region's start is decreased to the next line offset, and the end offset |
| * increased to the next line start or the end of the document. |
| * <code>null</code> is returned if <code>region</code> is |
| * <code>null</code> itself or does not comprise at least one line |
| * delimiter, as a single line cannot be folded. |
| * |
| * @param region |
| * the region to align, may be <code>null</code> |
| * @return a region equal or greater than <code>region</code> that is |
| * aligned with line offsets, <code>null</code> if the region is |
| * too small to be foldable (e.g. covers only one line) |
| */ |
| private final IRegion alignRegion(IRegion region) { |
| if (region == null) { |
| return null; |
| } |
| |
| IDocument document = getDocument(); |
| try { |
| int start = document.getLineOfOffset(region.getOffset()); |
| int end = document.getLineOfOffset(region.getOffset() + region.getLength()); |
| if (start >= end) { |
| return null; |
| } |
| |
| int offset = document.getLineOffset(start); |
| int endOffset; |
| if (document.getNumberOfLines() > end + 1) { |
| endOffset = document.getLineOffset(end + 1); |
| } else { |
| endOffset = document.getLineOffset(end) + document.getLineLength(end); |
| } |
| |
| return new Region(offset, endOffset - offset); |
| } catch (BadLocationException x) { |
| // concurrent modification |
| return null; |
| } |
| } |
| |
| private Object getLockObject(IAnnotationModel annotationModel) { |
| if (annotationModel instanceof ISynchronizable) { |
| Object lock= ((ISynchronizable)annotationModel).getLockObject(); |
| if (lock != null) |
| return lock; |
| } |
| return annotationModel; |
| } |
| |
| private IDocument getDocument() { |
| return myViewer.getDocument(); |
| } |
| } |