org.projectusus.autotestsuite.ui.internal.util.AutoTestSuiteUIImages.java Source code

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Here is the source code for org.projectusus.autotestsuite.ui.internal.util.AutoTestSuiteUIImages.java

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// Copyright (c) 2009-2010 by the projectusus.org contributors
// This software is released under the terms and conditions
// of the Eclipse Public License (EPL) 1.0.
// See http://www.eclipse.org/legal/epl-v10.html for details.
package org.projectusus.autotestsuite.ui.internal.util;

import static org.projectusus.autotestsuite.AutoTestSuitePlugin.log;

import java.net.MalformedURLException;
import java.net.URL;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Display;
import org.osgi.framework.Bundle;
import org.projectusus.autotestsuite.AutoTestSuitePlugin;

public class AutoTestSuiteUIImages implements ISharedAutoTestSuiteImages {

    private static URL baseUrl;
    private static final ISharedAutoTestSuiteImages _instance = new AutoTestSuiteUIImages();
    private ImageRegistry imageRegistry;

    static {
        String pathPrefix = "icons/";
        try {
            Bundle bundle = AutoTestSuitePlugin.getDefault().getBundle();
            baseUrl = new URL(bundle.getEntry("/"), pathPrefix);
        } catch (MalformedURLException malfux) {
            // do nothing
        }
    }

    private final static String OBJECT = "obj16/"; // basic colors - size 16x16

    private AutoTestSuiteUIImages() {
        // no instantiation
    }

    public static ISharedAutoTestSuiteImages getSharedImages() {
        return _instance;
    }

    public Image getImage(String key) {
        return getImageRegistry().get(key);
    }

    public ImageDescriptor getDescriptor(String key) {
        return getImageRegistry().getDescriptor(key);
    }

    private void declareImages() {
        declare(OBJ_JUNIT_3, OBJECT + "junit3.gif");
        declare(OBJ_JUNIT_4, OBJECT + "junit4.gif");
        declare(OBJ_TAB, OBJECT + "tab.gif");
    }

    private void declare(final String key, final String path) {
        ImageDescriptor desc = ImageDescriptor.getMissingImageDescriptor();
        try {
            desc = ImageDescriptor.createFromURL(makeIconFileURL(path));
        } catch (MalformedURLException exception) {
            log(exception);
        }
        imageRegistry.put(key, desc);
    }

    private ImageRegistry getImageRegistry() {
        if (imageRegistry == null) {
            initializeImageRegistry();
        }
        return imageRegistry;
    }

    private ImageRegistry initializeImageRegistry() {
        imageRegistry = new ImageRegistry(Display.getDefault());
        declareImages();
        return imageRegistry;
    }

    private URL makeIconFileURL(final String iconPath) throws MalformedURLException {
        if (baseUrl == null) {
            throw new MalformedURLException();
        }
        return new URL(baseUrl, iconPath);
    }

}