| /******************************************************************************* |
| * Copyright (c) 2000, 2011 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.jdt.internal.ui.viewsupport; |
| |
| import java.util.ArrayList; |
| |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.swt.widgets.Item; |
| import org.eclipse.swt.widgets.Table; |
| import org.eclipse.swt.widgets.Widget; |
| |
| import org.eclipse.core.resources.IResource; |
| |
| import org.eclipse.jface.viewers.IBaseLabelProvider; |
| import org.eclipse.jface.viewers.LabelProviderChangedEvent; |
| import org.eclipse.jface.viewers.TableViewer; |
| |
| import org.eclipse.jdt.ui.IWorkingCopyProvider; |
| import org.eclipse.jdt.ui.ProblemsLabelDecorator.ProblemsLabelChangedEvent; |
| |
| /** |
| * Extends a TableViewer to allow more performance when showing error ticks. |
| * A <code>ProblemItemMapper</code> is contained that maps all items in |
| * the tree to underlying resource |
| */ |
| public class ProblemTableViewer extends TableViewer implements ResourceToItemsMapper.IContentViewerAccessor { |
| |
| protected ResourceToItemsMapper fResourceToItemsMapper; |
| |
| /** |
| * Constructor for ProblemTableViewer. |
| * |
| * @param parent the parent composite |
| */ |
| public ProblemTableViewer(Composite parent) { |
| super(parent); |
| initMapper(); |
| } |
| |
| /** |
| * Constructor for ProblemTableViewer. |
| * |
| * @param parent the parent composite |
| * @param style the style |
| */ |
| public ProblemTableViewer(Composite parent, int style) { |
| super(parent, style); |
| initMapper(); |
| } |
| |
| /** |
| * Constructor for ProblemTableViewer. |
| * |
| * @param table the table |
| */ |
| public ProblemTableViewer(Table table) { |
| super(table); |
| initMapper(); |
| } |
| |
| private void initMapper() { |
| fResourceToItemsMapper= new ResourceToItemsMapper(this); |
| } |
| |
| @Override |
| public void doUpdateItem(Widget item) { |
| doUpdateItem(item, item.getData(), true); |
| } |
| |
| /* |
| * @see StructuredViewer#mapElement(Object, Widget) |
| */ |
| @Override |
| protected void mapElement(Object element, Widget item) { |
| super.mapElement(element, item); |
| if (item instanceof Item) { |
| fResourceToItemsMapper.addToMap(element, (Item) item); |
| } |
| } |
| |
| /* |
| * @see StructuredViewer#unmapElement(Object, Widget) |
| */ |
| @Override |
| protected void unmapElement(Object element, Widget item) { |
| if (item instanceof Item) { |
| fResourceToItemsMapper.removeFromMap(element, (Item) item); |
| } |
| super.unmapElement(element, item); |
| } |
| |
| /* |
| * @see StructuredViewer#unmapAllElements() |
| */ |
| @Override |
| protected void unmapAllElements() { |
| fResourceToItemsMapper.clearMap(); |
| super.unmapAllElements(); |
| } |
| |
| /* |
| * @see ContentViewer#handleLabelProviderChanged(LabelProviderChangedEvent) |
| */ |
| @Override |
| protected void handleLabelProviderChanged(LabelProviderChangedEvent event) { |
| if (event instanceof ProblemsLabelChangedEvent) { |
| ProblemsLabelChangedEvent e= (ProblemsLabelChangedEvent) event; |
| if (!e.isMarkerChange() && canIgnoreChangesFromAnnotionModel()) { |
| return; |
| } |
| } |
| |
| Object[] changed= event.getElements(); |
| if (changed != null && !fResourceToItemsMapper.isEmpty()) { |
| ArrayList<Object> others= new ArrayList<>(changed.length); |
| for (int i= 0; i < changed.length; i++) { |
| Object curr= changed[i]; |
| if (curr instanceof IResource) { |
| fResourceToItemsMapper.resourceChanged((IResource) curr); |
| } else { |
| others.add(curr); |
| } |
| } |
| if (others.isEmpty()) { |
| return; |
| } |
| event= new LabelProviderChangedEvent((IBaseLabelProvider) event.getSource(), others.toArray()); |
| } |
| super.handleLabelProviderChanged(event); |
| } |
| |
| /** |
| * Answers whether this viewer can ignore label provider changes resulting from |
| * marker changes in annotation models |
| * @return returns <code>true</code> if annotation model changes can be ignored |
| */ |
| private boolean canIgnoreChangesFromAnnotionModel() { |
| Object contentProvider= getContentProvider(); |
| return contentProvider instanceof IWorkingCopyProvider && !((IWorkingCopyProvider)contentProvider).providesWorkingCopies(); |
| } |
| } |