/*******************************************************************************
 * Copyright (c) 2007, 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.ui.internal.views.markers;

import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.resources.IMarker;
import org.eclipse.core.resources.WorkspaceJob;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.ui.internal.ide.IDEWorkbenchMessages;
import org.eclipse.ui.internal.ide.Policy;
import org.eclipse.ui.views.markers.MarkerSupportView;
import org.eclipse.ui.views.markers.MarkerViewHandler;
import org.eclipse.ui.views.markers.internal.MarkerMessages;

/**
 * DeleteHandler is the handler for the deletion of a marker.
 * 
 * @since 3.4
 * 
 */
public class DeleteHandler extends MarkerViewHandler {

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.ExecutionEvent)
	 */
	public Object execute(ExecutionEvent event) throws ExecutionException {

		MarkerSupportView view = getView(event);
		if (view == null)
			return this;

		final IMarker[] selected = getSelectedMarkers(event);
		
		// Verify.
		MessageDialog dialog = new MessageDialog(
				view.getSite().getShell(),
				MarkerMessages.deleteActionConfirmTitle,
				null, // icon
				MarkerMessages.deleteActionConfirmMessage,
				MessageDialog.WARNING,
				new String[] { IDialogConstants.YES_LABEL,
						IDialogConstants.NO_LABEL }, 0);

		if (dialog.open() != 0) {
			return view;
		}
		
		WorkspaceJob deleteJob = new WorkspaceJob(IDEWorkbenchMessages.MarkerDeleteHandler_JobTitle){	//See Bug#250807
				public IStatus runInWorkspace(IProgressMonitor monitor)
				throws CoreException {
					monitor.beginTask(IDEWorkbenchMessages.MarkerDeleteHandler_JobMessageLabel, 10*selected.length);
					try {
						for (int i = 0; i < selected.length; i++) {
							if(monitor.isCanceled())return Status.CANCEL_STATUS;
							selected[i].delete();
							monitor.worked(10);
						}
					} catch (CoreException e) {
						Policy.handle(e);
						throw e;
					}finally{
						monitor.done();
					}
					return Status.OK_STATUS;
	 			}
			};
		deleteJob.setUser(true);
		deleteJob.schedule();

		return this;
	}
}