gov.redhawk.sca.internal.ui.StatusDataProviderDecorator.java Source code

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Here is the source code for gov.redhawk.sca.internal.ui.StatusDataProviderDecorator.java

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/** 
 * This file is protected by Copyright. 
 * Please refer to the COPYRIGHT file distributed with this source distribution.
 * 
 * This file is part of REDHAWK IDE.
 * 
 * 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.
 *
 */
package gov.redhawk.sca.internal.ui;

import gov.redhawk.model.sca.IStatusProvider;
import gov.redhawk.model.sca.ScaPackage;
import gov.redhawk.model.sca.commands.ScaModelCommand;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.emf.common.notify.Adapter;
import org.eclipse.emf.common.notify.impl.AdapterImpl;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.jface.viewers.IDecoration;
import org.eclipse.jface.viewers.ILightweightLabelDecorator;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.LabelProviderChangedEvent;
import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.PlatformUI;

/**
 * 
 */
public class StatusDataProviderDecorator extends LabelProvider implements ILightweightLabelDecorator {

    private boolean disposed;

    private final Adapter adaperListener = new AdapterImpl() {
        @Override
        public void notifyChanged(final org.eclipse.emf.common.notify.Notification msg) {
            if (StatusDataProviderDecorator.this.disposed) {
                if (msg.getNotifier() instanceof EObject) {
                    ((EObject) msg.getNotifier()).eAdapters().remove(this);
                }
                return;
            }

            switch (msg.getFeatureID(IStatusProvider.class)) {
            case ScaPackage.ISTATUS_PROVIDER__STATUS:
                final Object oldValue = msg.getOldValue();
                final Object newValue = msg.getNewValue();
                if (oldValue instanceof IStatus && newValue instanceof IStatus) {
                    final IStatus newStatus = (IStatus) newValue;
                    final IStatus oldStatus = (IStatus) oldValue;
                    if (newStatus.getSeverity() != oldStatus.getSeverity()) {
                        fireStatusChanged(msg.getNotifier());
                    }
                } else {
                    fireStatusChanged(msg.getNotifier());
                }
                break;
            default:
                break;
            }
        }
    };

    private void fireStatusChanged(final Object object) {
        final LabelProviderChangedEvent event = new LabelProviderChangedEvent(this, object);
        fireLabelProviderChanged(event);
    }

    @Override
    public void dispose() {
        super.dispose();
        this.disposed = true;
    }

    @Override
    public void decorate(final Object element, final IDecoration decoration) {
        if (element instanceof IStatusProvider) {
            final IStatusProvider statusProvider = (IStatusProvider) element;

            ScaModelCommand.execute(statusProvider, new ScaModelCommand() {

                @Override
                public void execute() {
                    if (!statusProvider.eAdapters().contains(StatusDataProviderDecorator.this.adaperListener)) {
                        statusProvider.eAdapters().add(StatusDataProviderDecorator.this.adaperListener);
                    }
                }

            });

            final ISharedImages sharedImages = PlatformUI.getWorkbench().getSharedImages();
            IStatus status = statusProvider.getStatus();
            if (status == null) {
                status = Status.OK_STATUS;
            }
            switch (status.getSeverity()) {
            case IStatus.WARNING:
                decoration.addOverlay(sharedImages.getImageDescriptor(ISharedImages.IMG_DEC_FIELD_WARNING),
                        IDecoration.BOTTOM_LEFT);
                break;
            case IStatus.ERROR:
                decoration.addOverlay(sharedImages.getImageDescriptor(ISharedImages.IMG_DEC_FIELD_ERROR),
                        IDecoration.BOTTOM_LEFT);
                break;
            default:
                break;
            }
        }

    }

}