com.density.ezsbt.views.SbtViewerDropAdapter.java Source code

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Here is the source code for com.density.ezsbt.views.SbtViewerDropAdapter.java

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/* Copyright 2015 Density Technologies
 *
 * 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 com.density.ezsbt.views;

import org.eclipse.core.resources.IContainer;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.viewers.TreeSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerDropAdapter;
import org.eclipse.swt.dnd.TransferData;

import com.density.ezsbt.util.SbtPlugin;
import com.density.ezsbt.views.SbtViewContentProvider.RootNode;

public class SbtViewerDropAdapter extends ViewerDropAdapter {

    public SbtViewerDropAdapter(Viewer viewer) {
        super(viewer);
    }

    @Override
    public boolean performDrop(Object data) {
        if (data.getClass().isAssignableFrom(TreeSelection.class)) {
            TreeSelection treeSelection = (TreeSelection) data;
            Object obj = treeSelection.getFirstElement();
            if (IJavaProject.class.isAssignableFrom(obj.getClass())) {
                IJavaProject javaProject = (IJavaProject) obj;
                return addNewSbtProject(javaProject.getProject());
            } else if (IContainer.class.isAssignableFrom(obj.getClass())) {
                return addNewSbtProject((IContainer) obj);
            }
        }
        return false;
    }

    protected boolean addNewSbtProject(IContainer container) {
        if (container.isAccessible()) {
            SbtViewContentProvider contentProvider = (SbtViewContentProvider) ((TreeViewer) getViewer())
                    .getContentProvider();
            RootNode root = contentProvider.getRoot();
            String path = getPath(container);
            if (!root.hasProject(path)) {
                addNewSbtProject(path, container.getName(), root);
                return true;
            }
        }
        return false;
    }

    protected String getPath(IContainer container) {
        String path = container.getLocationURI().getRawPath();
        if (System.getProperty("os.name").toLowerCase().contains("win")) {
            return path.substring(1);
        }
        return path;
    }

    protected void addNewSbtProject(String path, String projectId, RootNode root) {
        IPreferenceStore store = SbtPlugin.getInstance().getPreferenceStore();
        ProjectNode newSbtProject = new ProjectNode(path, projectId, store);
        root.addProject(newSbtProject);
        getViewer().refresh();
    }

    @Override
    public boolean validateDrop(Object target, int operation, TransferData transferType) {
        return true;
    }

    public void defaultCommands() {
        SbtPlugin.getInstance().getPreferenceStore();
    }

}