content: /*******************************************************************************
   * Copyright (c) 2000, 2008 IBM Corporation and others.
   * 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:
   *     IBM Corporation - initial API and implementation
   *******************************************************************************/
  package org.eclipse.wst.jsdt.internal.ui.packageview;
  
  import org.eclipse.core.resources.IContainer;
  import org.eclipse.core.resources.IProject;
  import org.eclipse.core.resources.IResource;
  import org.eclipse.core.resources.ResourcesPlugin;
  import org.eclipse.core.runtime.CoreException;
  import org.eclipse.jface.action.Action;
  import org.eclipse.jface.viewers.StructuredSelection;
  import org.eclipse.jface.viewers.StructuredViewer;
  import org.eclipse.jface.viewers.TreeViewer;
  import org.eclipse.swt.widgets.Shell;
  import org.eclipse.ui.PlatformUI;
  import org.eclipse.ui.dialogs.FilteredResourcesSelectionDialog;
  import org.eclipse.wst.jsdt.core.IJavaScriptElement;
  import org.eclipse.wst.jsdt.core.IJavaScriptModel;
  import org.eclipse.wst.jsdt.core.JavaScriptCore;
  import org.eclipse.wst.jsdt.internal.ui.IJavaHelpContextIds;
  
  public class GotoResourceAction extends Action {
  
  	private PackageExplorerPart fPackageExplorer;
  
  	private static class GotoResourceDialog extends FilteredResourcesSelectionDialog {
  		private IJavaScriptModel fJavaModel;
  		public GotoResourceDialog(Shell parentShell, IContainer container, StructuredViewer viewer) {
  			super(parentShell, false, container, IResource.FILE | IResource.FOLDER | IResource.PROJECT);
  			fJavaModel= JavaScriptCore.create(ResourcesPlugin.getWorkspace().getRoot());
  			setTitle(PackagesMessages.GotoResource_dialog_title); 
  			PlatformUI.getWorkbench().getHelpSystem().setHelp(parentShell, IJavaHelpContextIds.GOTO_RESOURCE_DIALOG);
  		}
  		
  		protected ItemsFilter createFilter() {
  			return new GotoResourceFilter();
  		}
  		
  		private class GotoResourceFilter extends ResourceFilter {
  
  			/*
  			 * (non-Javadoc)
  			 * 
  			 * @see org.eclipse.ui.dialogs.FilteredResourcesSelectionDialog.ResourceFilter#matchItem(java.lang.Object)
  			 */
  			public boolean matchItem(Object item) {
  				IResource resource = (IResource) item;
  				return super.matchItem(item) && select(resource);
  			}
  			
  			/**
  			 * This is the orignal <code>select</code> method. Since
  			 * <code>GotoResourceDialog</code> needs to extend
  			 * <code>FilteredResourcesSelectionDialog</code> result of this
  			 * method must be combined with the <code>matchItem</code> method
  			 * from super class (<code>ResourceFilter</code>).
  			 * 
  			 * @param resource
  			 *            A resource
  			 * @return <code>true</code> if item matches against given
  			 *         conditions <code>false</code> otherwise
  			 */
  			private boolean select(IResource resource) {
  				IProject project= resource.getProject();
  				try {
  					if (project.getNature(JavaScriptCore.NATURE_ID) != null)
  						return fJavaModel.contains(resource);
  				} catch (CoreException e) {
  					// do nothing. Consider resource;
  				}
  				return true;
  			}
  
  			/*
  			 * (non-Javadoc)
  			 * 
  			 * @see org.eclipse.ui.dialogs.FilteredResourcesSelectionDialog.ResourceFilter#equalsFilter(org.eclipse.ui.dialogs.FilteredItemsSelectionDialog.ItemsFilter)
  			 */
  			public boolean equalsFilter(ItemsFilter filter) {
  				if (!super.equalsFilter(filter)) {
  					return false;
  				}
  				if (!(filter instanceof GotoResourceFilter)) {
  					return false;
  				}
  				return true;
  			}
  		}
  		
  	}
  
  	public GotoResourceAction(PackageExplorerPart explorer) {
  		setText(PackagesMessages.GotoResource_action_label); 
  		PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.GOTO_RESOURCE_ACTION);
  		fPackageExplorer= explorer;
  	}
  	
  	public void run() {
  		TreeViewer viewer= fPackageExplorer.getTreeViewer();
  		GotoResourceDialog dialog= new GotoResourceDialog(fPackageExplorer.getSite().getShell(), 
  			ResourcesPlugin.getWorkspace().getRoot(), viewer);
  	 	dialog.open();
  	 	Object[] result = dialog.getResult();
  	 	if (result == null || result.length == 0 || !(result[0] instanceof IResource))
  	 		return;
  	 	StructuredSelection selection= null;
  		IJavaScriptElement element = JavaScriptCore.create((IResource)result[0]);
  		if (element != null && element.exists())
  			selection= new StructuredSelection(element);
  		else 
  			selection= new StructuredSelection(result[0]);
  		viewer.setSelection(selection, true);
  	}	
  }
  