/*******************************************************************************
 * 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.Iterator;

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.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.actions.SelectionProviderAction;

/**
 * Action to remove the selected bookmarks.
 */
public class ActionRemoveMarker extends SelectionProviderAction {
	
	private IWorkbenchPart part;

	/**
	 * Creates the action.
	 */
	public ActionRemoveMarker(IWorkbenchPart part, ISelectionProvider provider) {
		super(provider, Messages.getString("deleteAction.title")); //$NON-NLS-1$
		this.part = part;
		setImageDescriptor(PlatformUI.getWorkbench().getSharedImages().getImageDescriptor(ISharedImages.IMG_TOOL_DELETE));
		setDisabledImageDescriptor(PlatformUI.getWorkbench().getSharedImages().getImageDescriptor(ISharedImages.IMG_TOOL_DELETE_DISABLED));
		setToolTipText(Messages.getString("deleteAction.tooltip")); //$NON-NLS-1$
		setEnabled(false);
	}
	
	/**
	 * Delete the marker selection.
	 */
	public void run() {
		if (!isEnabled()) {
			return;
		}
		final IStructuredSelection selection = getStructuredSelection();
		if (selection.isEmpty()) {
			return;
		}
		try {
			ResourcesPlugin.getWorkspace().run(new IWorkspaceRunnable() {
				public void run(IProgressMonitor monitor) throws CoreException {
					for (Iterator iter = selection.iterator(); iter.hasNext();) {
						Object o = iter.next();
						if (o instanceof IMarker) {
							IMarker marker = (IMarker) o;
							marker.delete();
						}
					}
				}
			}, null);
		} 
		catch (CoreException e) {
			ErrorDialog.openError(part.getSite().getShell(), Messages.getString("RemoveMarker.errorTitle"), null, e.getStatus()); //$NON-NLS-1$
		}
	}
	
	public void selectionChanged(IStructuredSelection selection) {
		setEnabled(false);
		if (selection == null || selection.isEmpty()) {
			return;
		}
		for (Iterator iterator = selection.iterator(); iterator.hasNext();) {
			Object obj = iterator.next();
			if (!(obj instanceof IMarker)) {
				return;
			}
			IMarker marker = (IMarker) obj;
			if (!Util.isEditable(marker)) {
				return;
			}
		}
		setEnabled(true);			
	}
}