com.aptana.samples.ui.views.SamplesViewLabelProvider.java Source code

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Here is the source code for com.aptana.samples.ui.views.SamplesViewLabelProvider.java

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/**
 * Aptana Studio
 * Copyright (c) 2005-2011 by Appcelerator, Inc. All Rights Reserved.
 * Licensed under the terms of the GNU Public License (GPL) v3 (with exceptions).
 * Please see the license.html included with this distribution for details.
 * Any modifications to this file must keep this entire header intact.
 */
package com.aptana.samples.ui.views;

import java.io.File;
import java.net.URL;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.PlatformUI;

import com.aptana.samples.model.SampleCategory;
import com.aptana.samples.model.SamplesReference;
import com.aptana.samples.ui.SamplesUIPlugin;

/**
 * @author Kevin Lindsey
 * @author Michael Xia
 */
public class SamplesViewLabelProvider extends ColumnLabelProvider {

    private static final Image IMAGE_FOLDER = PlatformUI.getWorkbench().getSharedImages()
            .getImage(ISharedImages.IMG_OBJ_FOLDER);
    private static final String ICON_REMOTE = "icons/samples_remote.gif"; //$NON-NLS-1$
    private static final String ICON_SIZE = "16"; //$NON-NLS-1$

    private ImageRegistry imageRegistry;

    public SamplesViewLabelProvider() {
        imageRegistry = new ImageRegistry();
    }

    @Override
    public void dispose() {
        imageRegistry.dispose();
        super.dispose();
    }

    @Override
    public Image getImage(Object element) {
        if (element instanceof SampleCategory) {
            String iconFile = ((SampleCategory) element).getIconFile();
            if (iconFile != null) {
                File file = new File(iconFile);
                if (file.exists()) {
                    String iconFilename = file.getAbsolutePath();
                    Image image = imageRegistry.get(iconFilename);
                    if (image == null) {
                        image = new Image(Display.getDefault(), iconFilename);
                        imageRegistry.put(iconFilename, image);
                    }
                    return image;
                }
            }
            // uses folder as the default image
            return IMAGE_FOLDER;
        }
        if (element instanceof SamplesReference) {
            SamplesReference sample = (SamplesReference) element;
            URL url = sample.getIconUrl(ICON_SIZE);
            if (url == null) {
                // falls back to the default icon
                url = sample.getIconUrl();
            }
            if (url != null) {
                String key = url.toString();
                Image image = imageRegistry.get(key);
                if (image == null) {
                    imageRegistry.put(key, ImageDescriptor.createFromURL(url));
                    image = imageRegistry.get(key);
                }
                return image;
            }
            return SamplesUIPlugin.getImage(ICON_REMOTE);
        }
        return super.getImage(element);
    }

    @Override
    public String getText(Object element) {
        if (element instanceof SampleCategory) {
            return ((SampleCategory) element).getName();
        }
        if (element instanceof SamplesReference) {
            SamplesReference samplesRef = (SamplesReference) element;
            String name = samplesRef.getName();
            return (name == null) ? samplesRef.getLocation() : name;
        }
        return super.getText(element);
    }

    @Override
    public String getToolTipText(Object element) {
        String toolTipText;

        if (element instanceof SampleCategory) {
            return ((SampleCategory) element).getName();
        }
        if (element instanceof SamplesReference) {
            SamplesReference samplesRef = (SamplesReference) element;
            toolTipText = samplesRef.getDescription();
            if (toolTipText == null) {
                toolTipText = samplesRef.getName();
            }
            if (toolTipText == null) {
                toolTipText = samplesRef.getLocation();
            }
            return toolTipText;
        }
        return super.getText(element);
    }
}