| /******************************************************************************* |
| * Copyright (c) 2000, 2006 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.core.resources.IResource; |
| |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.swt.widgets.Item; |
| import org.eclipse.swt.widgets.Tree; |
| import org.eclipse.swt.widgets.Widget; |
| |
| import org.eclipse.jface.viewers.IBaseLabelProvider; |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.jface.viewers.ITreeSelection; |
| import org.eclipse.jface.viewers.LabelProviderChangedEvent; |
| import org.eclipse.jface.viewers.StructuredSelection; |
| import org.eclipse.jface.viewers.TreeViewer; |
| import org.eclipse.jface.viewers.ViewerFilter; |
| |
| import org.eclipse.jdt.core.IMember; |
| |
| import org.eclipse.jdt.ui.IWorkingCopyProvider; |
| import org.eclipse.jdt.ui.ProblemsLabelDecorator.ProblemsLabelChangedEvent; |
| |
| /** |
| * Extends a TreeViewer 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 ProblemTreeViewer extends TreeViewer implements ResourceToItemsMapper.IContentViewerAccessor { |
| |
| protected ResourceToItemsMapper fResourceToItemsMapper; |
| |
| /* |
| * @see TreeViewer#TreeViewer(Composite) |
| */ |
| public ProblemTreeViewer(Composite parent) { |
| super(parent); |
| initMapper(); |
| } |
| |
| /* |
| * @see TreeViewer#TreeViewer(Composite, int) |
| */ |
| public ProblemTreeViewer(Composite parent, int style) { |
| super(parent, style); |
| initMapper(); |
| } |
| |
| /* |
| * @see TreeViewer#TreeViewer(Tree) |
| */ |
| public ProblemTreeViewer(Tree tree) { |
| super(tree); |
| initMapper(); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jdt.internal.ui.viewsupport.ResourceToItemsMapper.IContentViewerAccessor#doUpdateItem(org.eclipse.swt.widgets.Widget) |
| */ |
| public void doUpdateItem(Widget item) { |
| doUpdateItem(item, item.getData(), true); |
| } |
| |
| private void initMapper() { |
| fResourceToItemsMapper= new ResourceToItemsMapper(this); |
| } |
| |
| |
| /* |
| * @see StructuredViewer#mapElement(Object, Widget) |
| */ |
| 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) |
| */ |
| protected void unmapElement(Object element, Widget item) { |
| if (item instanceof Item) { |
| fResourceToItemsMapper.removeFromMap(element, (Item) item); |
| } |
| super.unmapElement(element, item); |
| } |
| |
| /* |
| * @see StructuredViewer#unmapAllElements() |
| */ |
| protected void unmapAllElements() { |
| fResourceToItemsMapper.clearMap(); |
| super.unmapAllElements(); |
| } |
| |
| /* |
| * @see ContentViewer#handleLabelProviderChanged(LabelProviderChangedEvent) |
| */ |
| protected void handleLabelProviderChanged(LabelProviderChangedEvent event) { |
| if (event instanceof ProblemsLabelChangedEvent) { |
| ProblemsLabelChangedEvent e= (ProblemsLabelChangedEvent) event; |
| if (!e.isMarkerChange() && canIgnoreChangesFromAnnotionModel()) { |
| return; |
| } |
| } |
| Object[] changed= addAditionalProblemParents(event.getElements()); |
| |
| if (changed != null && !fResourceToItemsMapper.isEmpty()) { |
| ArrayList others= new ArrayList(); |
| 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()); |
| } else { |
| // we have modified the list of changed elements via add additional parents. |
| if (event.getElements() != changed) |
| event= new LabelProviderChangedEvent((IBaseLabelProvider) event.getSource(), changed); |
| } |
| super.handleLabelProviderChanged(event); |
| } |
| |
| /** |
| * Answers whether this viewer can ignore label provider changes resulting from |
| * marker changes in annotation models |
| */ |
| private boolean canIgnoreChangesFromAnnotionModel() { |
| Object contentProvider= getContentProvider(); |
| return contentProvider instanceof IWorkingCopyProvider && !((IWorkingCopyProvider)contentProvider).providesWorkingCopies(); |
| } |
| |
| |
| /** |
| * Decides if {@link #isExpandable(Object)} should also test filters. The default behaviour is to |
| * do this only for IMembers. Implementors can replace this behaviour. |
| * @param parent the given element |
| * @return returns if if {@link #isExpandable(Object)} should also test filters for the given element. |
| */ |
| protected boolean evaluateExpandableWithFilters(Object parent) { |
| return parent instanceof IMember; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.viewers.AbstractTreeViewer#isExpandable(java.lang.Object) |
| */ |
| public boolean isExpandable(Object parent) { |
| if (hasFilters() && evaluateExpandableWithFilters(parent)) { |
| // workaround for 65762 |
| Object[] children= getRawChildren(parent); |
| if (children.length > 0) { |
| ViewerFilter[] filters= getFilters(); |
| for (int i = 0; i < children.length; i++) { |
| if (!isFiltered(children[i], parent, filters)) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| return super.isExpandable(parent); |
| } |
| |
| protected boolean isFiltered(Object object, Object parent, ViewerFilter[] filters) { |
| for (int i = 0; i < filters.length; i++) { |
| ViewerFilter filter = filters[i]; |
| if (!filter.select(this, parent, object)) |
| return true; |
| } |
| return false; |
| } |
| |
| protected Object[] addAditionalProblemParents(Object[] elements) { |
| return elements; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.viewers.StructuredViewer#handleInvalidSelection(org.eclipse.jface.viewers.ISelection, org.eclipse.jface.viewers.ISelection) |
| */ |
| protected void handleInvalidSelection(ISelection invalidSelection, ISelection newSelection) { |
| // workaround for bug 125708: TODO: Remove when bug 125708 is fixed |
| if (!invalidSelection.isEmpty() && newSelection.isEmpty() && invalidSelection instanceof ITreeSelection) { |
| newSelection= new StructuredSelection(((IStructuredSelection) invalidSelection).toArray()); |
| setSelection(newSelection); |
| } |
| super.handleInvalidSelection(invalidSelection, newSelection); |
| } |
| } |
| |