eu.geclipse.ui.decorators.GridProjectFolderDecorator.java Source code

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Here is the source code for eu.geclipse.ui.decorators.GridProjectFolderDecorator.java

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/*****************************************************************************
 * Copyright (c) 2006, 2007 g-Eclipse Consortium 
 * 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
 *
 * Initial development of the original code was made for the
 * g-Eclipse project founded by European Union
 * project number: FP6-IST-034327  http://www.geclipse.eu/
 *
 * Contributors:
 *    Mathias Stuempert - initial API and implementation
 *****************************************************************************/
package eu.geclipse.ui.decorators;

import java.net.URL;
import java.util.Hashtable;
import java.util.List;

import org.eclipse.core.runtime.FileLocator;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IContributor;
import org.eclipse.core.runtime.IExtension;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Platform;
import org.eclipse.jface.resource.ImageDescriptor;
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.IDecoratorManager;
import org.eclipse.ui.PlatformUI;
import org.osgi.framework.Bundle;

import eu.geclipse.core.ExtensionManager;
import eu.geclipse.core.Extensions;
import eu.geclipse.core.model.IGridContainer;
import eu.geclipse.core.model.IGridElement;
import eu.geclipse.core.model.IGridProject;
import eu.geclipse.ui.internal.Activator;

public class GridProjectFolderDecorator extends LabelProvider implements ILightweightLabelDecorator {

    private static final String ID = "eu.geclipse.ui.gridProjectFolderDecorator"; //$NON-NLS-1$

    private Hashtable<String, ImageDescriptor> images = new Hashtable<String, ImageDescriptor>();

    public static GridProjectFolderDecorator getDecorator() {

        GridProjectFolderDecorator result = null;
        IDecoratorManager decoratorManager = PlatformUI.getWorkbench().getDecoratorManager();

        if (decoratorManager.getEnabled(ID)) {
            result = (GridProjectFolderDecorator) decoratorManager.getBaseLabelProvider(ID);
        }

        return result;

    }

    public GridProjectFolderDecorator() {

        ImageDescriptor standardImage = null;
        ImageDescriptor image = null;

        ExtensionManager extm = new ExtensionManager();
        List<IConfigurationElement> configurationElements = extm
                .getConfigurationElements(Extensions.PROJECT_FOLDER_POINT, Extensions.PROJECT_FOLDER_ELEMENT);

        for (IConfigurationElement element : configurationElements) {

            String id = element.getAttribute(Extensions.PROJECT_FOLDER_ID_ATTRIBUTE);
            String icon = element.getAttribute(Extensions.PROJECT_FOLDER_ICON_ATTRIBUTE);

            if (icon != null) {
                IExtension extension = element.getDeclaringExtension();
                IContributor contributor = extension.getContributor();
                String name = contributor.getName();
                Bundle bundle = Platform.getBundle(name);
                URL url = FileLocator.find(bundle, new Path(icon), null);
                image = ImageDescriptor.createFromURL(url);
            }

            else {
                if (standardImage == null) {
                    URL url = Activator.getDefault().getBundle().getEntry("icons/ovr16/project_ovr.gif"); //$NON-NLS-1$
                    standardImage = ImageDescriptor.createFromURL(url);
                }
                image = standardImage;
            }

            this.images.put(id, image);
        }
    }

    public void decorate(final Object element, final IDecoration decoration) {
        if (element instanceof IGridContainer) {
            decorate((IGridContainer) element, decoration);
        }
    }

    public void refresh(final IGridElement toUpdate) {
        LabelProviderChangedEvent event = new LabelProviderChangedEvent(getDecorator(), toUpdate);
        fireLabelProviderChanged(event);
    }

    public void refresh(final IGridElement[] toUpdate) {
        LabelProviderChangedEvent event = new LabelProviderChangedEvent(getDecorator(), toUpdate);
        fireLabelProviderChanged(event);
    }

    private void decorate(final IGridContainer container, final IDecoration decoration) {
        IGridContainer parent = container.getParent();
        if (parent instanceof IGridProject) {
            String id = ((IGridProject) parent).getProjectFolderID(container);
            if (id != null) {
                ImageDescriptor image = this.images.get(id);
                if (image != null) {
                    decoration.addOverlay(image, IDecoration.TOP_RIGHT);
                }
            }
        }
    }

}