org.eclipse.jdt.debug.ui/ui/org/eclipse/jdt/internal/debug/ui/actions/BreakpointSuspendPolicyToggleAction.java

package org.eclipse.jdt.internal.debug.ui.actions;

/**********************************************************************
Copyright (c) 2000, 2002 IBM Corp.  All rights reserved.
This file is 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
**********************************************************************/

import java.util.Iterator;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.jdt.debug.core.IJavaBreakpoint;
import org.eclipse.jdt.internal.debug.ui.JDIDebugUIPlugin;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
 
/**
 * Toggles whether a breakpoint suspends a VM or only
 * the event thread.
 */
public class BreakpointSuspendPolicyToggleAction extends BreakpointToggleAction {

	/**
	 * @see BreakpointToggleAction#doAction(IJavaBreakpoint)
	 */
	public void doAction(IJavaBreakpoint breakpoint) throws CoreException {
		if (breakpoint.getSuspendPolicy() == IJavaBreakpoint.SUSPEND_THREAD) {
			breakpoint.setSuspendPolicy(IJavaBreakpoint.SUSPEND_VM);
		} else {
			breakpoint.setSuspendPolicy(IJavaBreakpoint.SUSPEND_THREAD);
		}
	}

	/**
	 * @see BreakpointToggleAction#getToggleState(IJavaBreakpoint)
	 */
	protected boolean getToggleState(IJavaBreakpoint breakpoint) throws CoreException {
		return false;
	}

	/**
	 * @see BreakpointToggleAction#isEnabledFor(IStructuredSelection)
	 */
	public boolean isEnabledFor(IStructuredSelection selection) {
		Iterator iter= selection.iterator();
		while (iter.hasNext()) {
			Object element = iter.next();
			if (!(element instanceof IJavaBreakpoint)) {
				return false;
			}
			
		}
		return true;
	}

	/**
	 * @see IActionDelegate#selectionChanged(IAction, ISelection)
	 */
	public void selectionChanged(IAction action, ISelection selection) {
		super.selectionChanged(action, selection);
		if (action.isEnabled()) {
			IJavaBreakpoint bp = (IJavaBreakpoint)((IStructuredSelection)selection).getFirstElement();
			update(action, bp);
		}
	}
	
	/**
	 * @see IActionDelegate#selectionChanged(IAction, ISelection)
	 */
	public void update(IAction action, IJavaBreakpoint breakpoint) {
		try {
			if (breakpoint.getSuspendPolicy() == IJavaBreakpoint.SUSPEND_THREAD) {
				action.setText(ActionMessages.getString("BreakpointSuspendPolicy.Suspend_&VM_1")); //$NON-NLS-1$
			} else {
				action.setText(ActionMessages.getString("BreakpointSuspendPolicy.Suspend_&Thread_2")); //$NON-NLS-1$
			}
		} catch (CoreException e) {
			 JDIDebugUIPlugin.log(e);
		}
	}	
}