bundles/org.eclipse.ui.views/src/org/eclipse/ui/views/markers/internal/ActionDeleteCompleted.java

/*******************************************************************************
 * 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 java.util.ArrayList;
import java.util.List;

import org.eclipse.core.resources.IMarker;
import org.eclipse.core.resources.IWorkspaceRunnable;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.dialogs.ErrorDialog;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.actions.SelectionProviderAction;

public class ActionDeleteCompleted extends SelectionProviderAction {
	
	private MarkerRegistry registry;
	private IWorkbenchPart part;

	/**
	 * @param provider
	 * @param text
	 */
	public ActionDeleteCompleted(IWorkbenchPart part, ISelectionProvider provider, MarkerRegistry registry) {
		super(provider, Messages.getString("deleteCompletedAction.title")); //$NON-NLS-1$
		this.part = part;
		this.registry = registry;
		setEnabled(false);
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.jface.action.Action#run()
	 */
	public void run() {
		final List completed = getCompletedTasks();
		// Check if there is anything to do
		if (completed.size() == 0) {
			MessageDialog.openInformation(
				part.getSite().getShell(), 
				Messages.getString("deleteCompletedTasks.dialogTitle"),  //$NON-NLS-1$
				Messages.getString("deleteCompletedTasks.noneCompleted"));  //$NON-NLS-1$
			return;
		}
		String message;
		if (completed.size() == 1) {
			message = Messages.getString("deleteCompletedTasks.permanentSingular"); //$NON-NLS-1$
		}
		else {
			message = Messages.format("deleteCompletedTasks.permanentPlural", //$NON-NLS-1$
				new Object[] { new Integer(completed.size()) } );
		}
		// Verify.
		if (!MessageDialog
			.openConfirm(
				part.getSite().getShell(), 
				Messages.getString("deleteCompletedTasks.dialogTitle"),  //$NON-NLS-1$
				message)) {
			return;
		}
		try {
			ResourcesPlugin.getWorkspace().run(new IWorkspaceRunnable() {
				public void run(IProgressMonitor monitor) {
					for (int i = 0; i < completed.size(); i++) {
						IMarker marker = (IMarker) completed.get(i);
						try {
							marker.delete();
						}
						catch (CoreException e) {
						}
					}
				}
			}, null);
		}
		catch (CoreException e) {
			ErrorDialog.openError(part.getSite().getShell(), Messages.getString("deleteCompletedTasks.errorMessage"), null, e.getStatus()); //$NON-NLS-1$
		}
	}
	
	private List getCompletedTasks() {
		List completed = new ArrayList();
		Object[] markers = registry.getElements();
		
		for (int i = 0; i < markers.length; i++) {
			IMarker marker = (IMarker) markers[i];
			if (Util.isEditable(marker) && marker.getAttribute(IMarker.DONE, false)) {
				completed.add(marker);
			}
		}
		
		return completed;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.ui.actions.SelectionProviderAction#selectionChanged(org.eclipse.jface.viewers.IStructuredSelection)
	 */
	public void selectionChanged(IStructuredSelection selection) {
		setEnabled(!selection.isEmpty());
	}

}