au.gov.ga.earthsci.application.parts.layer.handlers.PasteHandler.java Source code

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Here is the source code for au.gov.ga.earthsci.application.parts.layer.handlers.PasteHandler.java

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/*******************************************************************************
 * Copyright 2012 Geoscience Australia
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * 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 au.gov.ga.earthsci.application.parts.layer.handlers;

import java.io.File;

import javax.inject.Inject;
import javax.inject.Named;

import org.eclipse.e4.core.di.annotations.CanExecute;
import org.eclipse.e4.core.di.annotations.Execute;
import org.eclipse.e4.core.di.annotations.Optional;
import org.eclipse.e4.ui.services.IServiceConstants;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.dnd.Clipboard;
import org.eclipse.swt.dnd.FileTransfer;

import au.gov.ga.earthsci.application.parts.layer.LayerTransfer;
import au.gov.ga.earthsci.application.parts.layer.LayerTransferData;
import au.gov.ga.earthsci.application.parts.layer.LayerTransferData.TransferredLayer;
import au.gov.ga.earthsci.core.model.layer.ILayerTreeNode;
import au.gov.ga.earthsci.core.model.layer.LayerNode;
import au.gov.ga.earthsci.core.worldwind.ITreeModel;

/**
 * Handles paste commands for the layer tree.
 * 
 * @author Michael de Hoog (michael.dehoog@ga.gov.au)
 */
public class PasteHandler {
    @Inject
    private ITreeModel model;

    @Execute
    public void execute(@Optional @Named(IServiceConstants.ACTIVE_SELECTION) ILayerTreeNode target,
            TreeViewer viewer, Clipboard clipboard) {
        if (target == null)
            target = model.getRootNode();

        LayerTransferData data = (LayerTransferData) clipboard.getContents(LayerTransfer.getInstance());
        if (data != null) {
            for (TransferredLayer layer : data.getLayers()) {
                ILayerTreeNode node = layer.getNode();
                target.add(node);
                viewer.add(target, node);
                viewer.reveal(node);
            }
        }

        String[] filenames = (String[]) clipboard.getContents(FileTransfer.getInstance());
        if (filenames != null) {
            for (String filename : filenames) {
                File file = new File(filename);
                if (file.isFile()) {
                    LayerNode node = new LayerNode();
                    node.setName(file.getName());
                    node.setEnabled(true);
                    node.setURI(file.toURI());
                    target.add(node);
                    viewer.add(target, node);
                    viewer.reveal(node);
                }
            }
        }
    }

    @CanExecute
    public boolean canExecute(Clipboard clipboard) {
        LayerTransferData data = (LayerTransferData) clipboard.getContents(LayerTransfer.getInstance());
        if (data != null) {
            return true;
        }
        String[] filenames = (String[]) clipboard.getContents(FileTransfer.getInstance());
        if (filenames != null) {
            return true;
        }
        return false;
    }
}