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/*
* Copyright (c) 2015 Eike Stepper (Loehne, Germany) and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v2.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v20.html
*
* Contributors:
* Eike Stepper - initial API and implementation
*/
package org.eclipse.oomph.ostools;
import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.ui.handlers.HandlerUtil;
import java.io.File;
/**
* @author Eike Stepper
*/
public abstract class AbstractLocationHandler extends AbstractHandler
{
public AbstractLocationHandler()
{
}
public Object execute(ExecutionEvent event) throws ExecutionException
{
ISelection selection = HandlerUtil.getActiveMenuSelection(event);
File location = getLocation(selection);
try
{
execute(location);
}
catch (Exception ex)
{
ex.printStackTrace();
}
return null;
}
protected abstract void execute(File location) throws Exception;
public static File getLocation(ISelection selection)
{
if (selection instanceof IStructuredSelection)
{
IStructuredSelection ssel = (IStructuredSelection)selection;
Object element = ssel.getFirstElement();
return getLocation(element);
}
return null;
}
private static File getLocation(Object element)
{
IContainer container = getContainer(element);
if (container != null)
{
return new File(container.getLocation().toOSString());
}
File directory = getDirectory(element);
if (directory != null)
{
return directory;
}
File workTree = getWorkTree(element);
if (workTree != null)
{
return workTree;
}
return null;
}
private static IContainer getContainer(Object element)
{
if (element instanceof IContainer)
{
return (IContainer)element;
}
if (element instanceof IResource)
{
return ((IResource)element).getParent();
}
if (element instanceof IAdaptable)
{
Object adapter = ((IAdaptable)element).getAdapter(IResource.class);
return getContainer(adapter);
}
return null;
}
private static File getDirectory(Object element)
{
if (element instanceof File)
{
File file = (File)element;
if (file.isDirectory())
{
return file;
}
return file.getParentFile();
}
if (element instanceof IAdaptable)
{
Object adapter = ((IAdaptable)element).getAdapter(File.class);
return getDirectory(adapter);
}
return null;
}
private static File getWorkTree(Object element)
{
try
{
return GitHelper.getWorkTree(element);
}
catch (Throwable ex)
{
return null;
}
}
/**
* @author Eike Stepper
*/
private static final class GitHelper
{
public static File getWorkTree(Object element)
{
if (element instanceof Repository)
{
return ((Repository)element).getWorkTree();
}
if (element instanceof IAdaptable)
{
Object adapter = ((IAdaptable)element).getAdapter(Repository.class);
return getWorkTree(adapter);
}
return null;
}
}
}
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