com.google.gdt.eclipse.managedapis.ui.ManagedApiContainerDecorator.java Source code

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Here is the source code for com.google.gdt.eclipse.managedapis.ui.ManagedApiContainerDecorator.java

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/*******************************************************************************
 * Copyright 2011 Google Inc. All Rights Reserved.
 *
 * 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
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *******************************************************************************/
package com.google.gdt.eclipse.managedapis.ui;

import com.google.gdt.eclipse.managedapis.ManagedApi;
import com.google.gdt.eclipse.managedapis.ManagedApiLogger;
import com.google.gdt.eclipse.managedapis.ManagedApiPlugin;
import com.google.gdt.eclipse.managedapis.Resources;
import com.google.gdt.eclipse.managedapis.platform.ManagedApiContainer;

import org.eclipse.jdt.internal.ui.packageview.ClassPathContainer;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.DecorationContext;
import org.eclipse.jface.viewers.IDecoration;
import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.ILightweightLabelDecorator;

import java.net.MalformedURLException;

/**
 * Customizes icons for ManagedApi classpath containers.
 */
@SuppressWarnings("restriction")
public class ManagedApiContainerDecorator extends BaseManagedApiDecorator implements ILightweightLabelDecorator {

    private Resources resources;

    public ManagedApiContainerDecorator() {
        super();
        resources = ManagedApiPlugin.getDefault().getResources();
    }

    public void addListener(ILabelProviderListener listener) {
        // Nothing to do here
    }

    /**
     * Conditionally decorate the element by replacing the element's icon
     */
    public void decorate(Object element, IDecoration decoration) {
        // Enables use of REPLACE as a valid image decoration
        ((DecorationContext) decoration.getDecorationContext()).putProperty(IDecoration.ENABLE_REPLACE, true);

        try {
            if (ManagedApiContainer.isManagedApiContainer(element)) {
                applyApiSpecificContainerIcon(element, decoration);
            }
        } catch (MalformedURLException e) {
            ManagedApiLogger.warn(e, "Unexpected MalformedURLException");
        }
    }

    public void dispose() {
        // Nothing to do here
    }

    public boolean isLabelProperty(Object element, String property) {
        return false;
    }

    public void removeListener(ILabelProviderListener listener) {
        // Nothing to do here
    }

    private void applyApiSpecificContainerIcon(Object element, IDecoration decoration)
            throws MalformedURLException {
        ImageDescriptor replacementIcon = null;

        ManagedApi managedApi = ManagedApiContainer
                .getManagedApiForClassPathContainer((ClassPathContainer) element);
        if (managedApi != null && managedApi.hasClasspathContainerIcon()) {
            replacementIcon = managedApi.getClasspathContainerIconImageDescriptor();
        }
        if (replacementIcon == null) {
            replacementIcon = resources.getGoogleAPIContainerIcon16ImageDescriptor();
        }
        decoration.addOverlay(replacementIcon, IDecoration.REPLACE);
    }
}