| /******************************************************************************* |
| * Copyright (c) 2007, 2012 Nokia and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Nokia - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.cdt.debug.ui.breakpoints; |
| |
| import org.eclipse.cdt.debug.core.ICWatchpointTarget; |
| import org.eclipse.cdt.debug.internal.core.CRequest; |
| import org.eclipse.debug.core.DebugPlugin; |
| import org.eclipse.jface.action.IAction; |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.jface.viewers.StructuredSelection; |
| import org.eclipse.jface.viewers.TreeSelection; |
| |
| /** |
| * Invoked when user right clicks on an element in the Variables or Expressions |
| * view and selects 'Add Watchpoint (C/C++)' Clients can register this action for |
| * their specific element type which adapts to {@link ICWatchpointTarget}. |
| * |
| * |
| * @noextend This class is not intended to be subclassed by clients. |
| * @since 7.2 |
| */ |
| public class AddWatchpointOnVariableActionDelegate extends AddWatchpointActionDelegate { |
| |
| /** The target variable/expression */ |
| private ICWatchpointTarget fVar; |
| |
| /** |
| * Constructor |
| */ |
| public AddWatchpointOnVariableActionDelegate() { |
| super(); |
| } |
| |
| private class CanCreateWatchpointRequest extends CRequest implements ICWatchpointTarget.CanCreateWatchpointRequest { |
| boolean fCanCreate; |
| |
| @Override |
| public boolean getCanCreate() { |
| return fCanCreate; |
| } |
| |
| @Override |
| public void setCanCreate(boolean value) { |
| fCanCreate = value; |
| } |
| } |
| |
| /** |
| * Record the target variable/expression |
| * |
| * @see org.eclipse.ui.actions.ActionDelegate#selectionChanged(org.eclipse.jface.action.IAction, |
| * org.eclipse.jface.viewers.ISelection) |
| */ |
| @Override |
| public void selectionChanged(final IAction action, ISelection selection) { |
| super.selectionChanged(action, selection); |
| fVar = null; |
| if (selection == null || selection.isEmpty()) { |
| action.setEnabled(false); |
| return; |
| } |
| if (selection instanceof TreeSelection) { |
| Object obj = ((TreeSelection) selection).getFirstElement(); |
| fVar = (ICWatchpointTarget) DebugPlugin.getAdapter(obj, ICWatchpointTarget.class); |
| if (fVar != null) { |
| final ICWatchpointTarget.CanCreateWatchpointRequest request = new CanCreateWatchpointRequest() { |
| @Override |
| public void done() { |
| action.setEnabled(getCanCreate()); |
| } |
| }; |
| fVar.canSetWatchpoint(request); |
| return; |
| } |
| assert false : "action should not have been available for object " + obj; //$NON-NLS-1$ |
| } else if (selection instanceof StructuredSelection) { |
| // Not sure why, but sometimes we get an extraneous empty StructuredSelection. Seems harmless enough |
| assert ((StructuredSelection) selection).getFirstElement() == null |
| : "action installed in unexpected type of view/part"; //$NON-NLS-1$ |
| } else { |
| assert false : "action installed in unexpected type of view/part"; //$NON-NLS-1$ |
| } |
| action.setEnabled(false); |
| } |
| } |