org.eclipse.jdt.internal.debug.ui.jres.JREsEnvironmentLabelProvider.java Source code

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Here is the source code for org.eclipse.jdt.internal.debug.ui.jres.JREsEnvironmentLabelProvider.java

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/*******************************************************************************
 * Copyright (c) 2005, 2012 IBM Corporation and others.
 * 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
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.internal.debug.ui.jres;

import org.eclipse.jdt.internal.debug.ui.JDIDebugUIPlugin;
import org.eclipse.jdt.launching.IVMInstall;
import org.eclipse.jdt.launching.environments.IExecutionEnvironment;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.viewers.IFontProvider;
import org.eclipse.osgi.util.NLS;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.widgets.Display;

/**
 * Decorates JREs to emphasize those that are strictly compatible with an environment.
 *  
 * @since 3.2
 *
 */
public class JREsEnvironmentLabelProvider extends JREsLabelProvider implements IFontProvider {

    private IExecutionEnvironmentProvider fProvider;
    private Font fFont = null;

    /**
     * Returns the current environment or <code>null</code> id none
     * 
     * @since 3.2
     */
    public interface IExecutionEnvironmentProvider {
        public IExecutionEnvironment getEnvironment();
    }

    public JREsEnvironmentLabelProvider(IExecutionEnvironmentProvider provider) {
        fProvider = provider;
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.LabelProvider#dispose()
     */
    @Override
    public void dispose() {
        if (fFont != null) {
            fFont.dispose();
        }
        super.dispose();
    }

    /* (non-Javadoc)
     * @see org.eclipse.jdt.internal.debug.ui.jres.JREsLabelProvider#getText(java.lang.Object)
     */
    @Override
    public String getText(Object element) {
        String label = super.getText(element);
        if (isStrictlyCompatible(element)) {
            label = NLS.bind(JREMessages.JREsEnvironmentLabelProvider_0,
                    new String[] { label, JREMessages.JREsEnvironmentLabelProvider_1 });
        }
        return label;
    }

    private boolean isStrictlyCompatible(Object element) {
        IExecutionEnvironment environment = fProvider.getEnvironment();
        if (environment != null && element instanceof IVMInstall) {
            return environment.isStrictlyCompatible((IVMInstall) element);
        }
        return false;
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.IFontProvider#getFont(java.lang.Object)
     */
    public Font getFont(Object element) {
        if (isStrictlyCompatible(element)) {
            if (fFont == null) {
                Font dialogFont = JFaceResources.getDialogFont();
                FontData[] fontData = dialogFont.getFontData();
                for (int i = 0; i < fontData.length; i++) {
                    FontData data = fontData[i];
                    data.setStyle(SWT.BOLD);
                }
                Display display = JDIDebugUIPlugin.getActiveWorkbenchShell().getDisplay();
                fFont = new Font(display, fontData);
            }
            return fFont;
        }
        return null;
    }

}