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/*******************************************************************************
* Copyright (c) 2000, 2008 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
*******************************************************************************/
package org.eclipse.cdt.internal.ui.util;
import java.util.ArrayList;
import org.eclipse.cdt.internal.ui.viewsupport.ProblemsLabelDecorator.ProblemsLabelChangedEvent;
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.swt.widgets.Composite;
import org.eclipse.swt.widgets.Item;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.Widget;
/**
* 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 {
protected ResourceToItemsMapper fResourceToItemsMapper;
/**
* Constructor for ProblemTableViewer.
* @param parent
*/
public ProblemTableViewer(Composite parent) {
super(parent);
initMapper();
}
/**
* Constructor for ProblemTableViewer.
* @param parent
* @param style
*/
public ProblemTableViewer(Composite parent, int style) {
super(parent, style);
initMapper();
}
/**
* Constructor for ProblemTableViewer.
* @param table
*/
public ProblemTableViewer(Table table) {
super(table);
initMapper();
}
private void initMapper() {
fResourceToItemsMapper = new ResourceToItemsMapper(this);
}
/*
* @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
*/
private boolean canIgnoreChangesFromAnnotionModel() {
// Object contentProvider= getContentProvider();
// return contentProvider instanceof IWorkingCopyProvider && !((IWorkingCopyProvider)contentProvider).providesWorkingCopies();
return true;
}
}
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