bundles/org.eclipse.ui.views/src/org/eclipse/ui/views/tasklist/PasteTaskAction.java

/**********************************************************************
Copyright (c) 2000, 2002 IBM Corp. 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 implementation
**********************************************************************/

package org.eclipse.ui.views.tasklist;

import java.util.ArrayList;
import java.util.Map;

import org.eclipse.core.resources.*;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.dialogs.ErrorDialog;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.ui.help.WorkbenchHelp;
import org.eclipse.ui.part.MarkerTransfer;

/**
 * Standard action for pasting tasks from the clipboard.
 * <p>
 * This class may be instantiated; it is not intended to be subclassed.
 * </p>
 * 
 * @since 2.0
 */
class PasteTaskAction extends TaskAction {

	/**
	 * Creates a new action.
	 */
	public PasteTaskAction(TaskList tasklist, String id) {
		super(tasklist, id);
		WorkbenchHelp.setHelp(this, ITaskListHelpContextIds.PASTE_TASK_ACTION);
	}

	/**
	 * Implementation of method defined on <code>IAction</code>.
	 */
	public void run() {
		// Get the markers from the clipboard
		MarkerTransfer transfer = MarkerTransfer.getInstance();
		final IMarker[] markerData = (IMarker[])getTaskList().getClipboard().getContents(transfer);
		
		if (markerData == null) 
			return;
	
	 	final ArrayList newMarkers = new ArrayList();
	
		try {
			getTaskList().getWorkspace().run(new IWorkspaceRunnable() {
				public void run(IProgressMonitor monitor) throws CoreException {
					for (int i = 0; i < markerData.length; i++) {
						// Only paste tasks (not problems)
						if (!markerData[i].getType().equals(IMarker.TASK))
							continue;
							
						// Paste to the same resource as the original
						IResource resource = markerData[i].getResource();
						Map attributes = markerData[i].getAttributes();
						IMarker marker = resource.createMarker(IMarker.TASK);
						marker.setAttributes(attributes);
						newMarkers.add(marker);
					}
				}
			}, null);
		} catch (CoreException e) {
			ErrorDialog.openError(
				getShell(),
				TaskListMessages.getString("PasteTask.errorMessage"), //$NON-NLS-1$
				null,
				e.getStatus());
			return;
		}
	
		// Need to do this in an asyncExec, even though we're in the UI thread here,
		// since the task list updates itself with the addition in an asyncExec,
		// which hasn't been processed yet.
		// Must be done outside IWorkspaceRunnable above since notification for add is
		// sent after IWorkspaceRunnable is run.
		if (newMarkers.size() > 0) {
			getShell().getDisplay().asyncExec(new Runnable() {
				public void run() {
					TaskList taskList = getTaskList();
					taskList.setSelection(new StructuredSelection(newMarkers), true);	
				}
			});
		}
	}

}