content: /**
   *  Copyright (c) 2013-2016 Angelo ZERR.
   *  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
   *
   *  Contributors:
   *  Angelo Zerr <angelo.zerr@gmail.com> - initial API and implementation
   */
  package tern.eclipse.ide.jsdt.internal.ui.utils;
  
  import org.eclipse.core.resources.IFile;
  import org.eclipse.core.resources.IWorkspaceRoot;
  import org.eclipse.core.resources.ResourcesPlugin;
  import org.eclipse.core.runtime.IPath;
  import org.eclipse.core.runtime.Path;
  import org.eclipse.jface.text.IDocument;
  import org.eclipse.wst.sse.core.StructuredModelManager;
  import org.eclipse.wst.sse.core.internal.provisional.IStructuredModel;
  import org.eclipse.wst.xml.core.internal.provisional.document.IDOMNode;
  
  /**
   * Utilities for SSE DOM node {@link IDOMNode}.
   * 
   */
  public class DOMUtils {
  
  	/**
  	 * Returns the owner file of the JFace document {@link IDocument}.
  	 * 
  	 * @param document
  	 * @return
  	 */
  	public static final IFile getFile(IDocument document) {
  		if (document == null) {
  			return null;
  		}
  		IStructuredModel model = null;
  		try {
  			model = StructuredModelManager.getModelManager()
  					.getExistingModelForRead(document);
  			if (model != null) {
  				return getFile(model);
  			}
  		} finally {
  			if (model != null)
  				model.releaseFromRead();
  		}
  		return null;
  	}
  
  	/**
  	 * Returns the owner file of the SSE model {@link IStructuredModel}.
  	 * 
  	 * @param node
  	 *            the SSE model.
  	 * @return
  	 */
  	public static final IFile getFile(IStructuredModel model) {
  		String baselocation = model.getBaseLocation();
  		if (baselocation != null) {
  			IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
  			IPath filePath = new Path(baselocation);
  			if (filePath.segmentCount() > 1) {
  				return root.getFile(filePath);
  			}
  		}
  		return null;
  	}
  }
  