com.google.dart.tools.ui.internal.actions.AddTaskAction.java Source code

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Here is the source code for com.google.dart.tools.ui.internal.actions.AddTaskAction.java

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/*
 * Copyright (c) 2011, the Dart project authors.
 * 
 * Licensed under the Eclipse Public License v1.0 (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.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.dart.tools.ui.internal.actions;

import com.google.dart.tools.ui.actions.SelectionDispatchAction;
import com.google.dart.tools.ui.internal.text.DartHelpContextIds;

import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IWorkbenchSite;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.views.tasklist.TaskPropertiesDialog;

public class AddTaskAction extends SelectionDispatchAction {

    public AddTaskAction(IWorkbenchSite site) {
        super(site);
        setEnabled(false);
        PlatformUI.getWorkbench().getHelpSystem().setHelp(this, DartHelpContextIds.ADD_TASK_ACTION);
    }

    @Override
    public void run(IStructuredSelection selection) {
        IResource resource = getElement(selection);
        if (resource == null) {
            return;
        }

        TaskPropertiesDialog dialog = new TaskPropertiesDialog(getShell());
        dialog.setResource(resource);
        dialog.open();
    }

    @Override
    public void selectionChanged(IStructuredSelection selection) {
        setEnabled(getElement(selection) != null);
    }

    private IResource getElement(IStructuredSelection selection) {
        if (selection.size() != 1) {
            return null;
        }

        Object element = selection.getFirstElement();
        if (!(element instanceof IAdaptable)) {
            return null;
        }
        return (IResource) ((IAdaptable) element).getAdapter(IResource.class);
    }
}