RefreshHandler.java

/*******************************************************************************
 * Copyright (c) 2011, 2012 Wind River Systems, Inc. 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:
 *     Wind River Systems - initial API and implementation
 *******************************************************************************/
package org.eclipse.tcf.internal.debug.ui.commands;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.debug.ui.DebugUITools;
import org.eclipse.debug.ui.IDebugUIConstants;
import org.eclipse.debug.ui.IDebugView;
import org.eclipse.debug.ui.memory.IMemoryRenderingSite;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.tcf.internal.debug.ui.model.TCFModel;
import org.eclipse.tcf.internal.debug.ui.model.TCFNode;
import org.eclipse.tcf.internal.debug.ui.model.TCFNodeExecContext;
import org.eclipse.tcf.protocol.Protocol;
import org.eclipse.tcf.util.TCFDataCache;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchPartSite;
import org.eclipse.ui.handlers.HandlerUtil;

public class RefreshHandler extends AbstractHandler {

    public Object execute(ExecutionEvent event) throws ExecutionException {
        Object input = null;
        final IWorkbenchPart part = HandlerUtil.getActivePart(event);
        if (part instanceof IMemoryRenderingSite) {
            IWorkbenchPartSite site = part.getSite();
            if (site != null) {
                ISelection selection = DebugUITools.getDebugContextManager().getContextService(
                        site.getWorkbenchWindow()).getActiveContext();
                if (selection instanceof IStructuredSelection) {
                    input = ((IStructuredSelection)selection).getFirstElement();
                }
            }
        }
        else if (part instanceof IDebugView) {
            IWorkbenchPartSite site = part.getSite();
            if (site != null && IDebugUIConstants.ID_DEBUG_VIEW.equals(site.getId())) {
                ISelection selection = HandlerUtil.getCurrentSelection(event);
                if (selection instanceof IStructuredSelection) {
                    Object obj = ((IStructuredSelection)selection).getFirstElement();
                    if (obj instanceof TCFNode) input = ((TCFNode)obj).getModel().getRootNode();
                }
            }
            else {
                input = ((IDebugView)part).getViewer().getInput();
            }
        }
        if (input instanceof TCFNode) {
            final TCFNode node = (TCFNode)input;
            Protocol.invokeLater(new Runnable() {
                public void run() {
                    TCFModel model = node.getModel();
                    TCFNode ref_node = node;
                    if (part instanceof IMemoryRenderingSite) {
                        // Search memory node
                        TCFDataCache<TCFNodeExecContext> mem_cache = model.searchMemoryContext(node);
                        if (mem_cache == null) return;
                        if (!mem_cache.validate(this)) return;
                        ref_node = mem_cache.getData();
                    }
                    if (ref_node != null) {
                        ref_node.refresh(part);
                        if (model.clearLock(part)) {
                            model.setLock(part);
                        }
                    }
                }
            });
        }
        return null;
    }
}