/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.ui.views.markers.internal;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IMarker;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IFileEditorInput;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.actions.SelectionProviderAction;

public class ActionRevealMarker extends SelectionProviderAction {

	protected IWorkbenchPart part;

	/**
	 * @param provider
	 * @param text
	 */
	public ActionRevealMarker(IWorkbenchPart part, ISelectionProvider provider) {
		super(provider, ""); //$NON-NLS-1$
		this.part = part;
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.jface.action.Action#run()
	 */
	public void run() {
		IStructuredSelection selection = getStructuredSelection();
		Object obj = selection.getFirstElement();
		if (obj == null || !(obj instanceof IMarker))
			return;
			
		IMarker marker = (IMarker) obj;
		IEditorPart editor = part.getSite().getPage().getActiveEditor();
		if (editor == null)
			return;
		IEditorInput input = editor.getEditorInput();
		if (input instanceof IFileEditorInput) {
			IFile file = ((IFileEditorInput) input).getFile();
			if (marker.getResource().equals(file)) {
				try {
					part.getSite().getPage().openEditor(marker, false);
				}
				catch (CoreException e) {
				}
			}
		}
	}
	
	public void selectionChanged(IStructuredSelection selection) {
		setEnabled(selection != null && selection.size() == 1);
		if (isEnabled()) {
			run();
		}
	}
}