/*******************************************************************************
 * Copyright (c) 2000, 2007 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.internal.debug.ui.actions;

 
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.ISelectionChangedListener;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.window.IShellProvider;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.dialogs.PropertyDialogAction;

/**
 * Presents the standard properties dialog to configure
 * the attributes of a Java Breakpoint.
 */
public class JavaBreakpointPropertiesAction implements IObjectActionDelegate {
	
	private IWorkbenchPart fPart;
	private IJavaBreakpoint fBreakpoint;

	/**
	 * @see IActionDelegate#run(IAction)
	 */
	public void run(IAction action) {
	    IShellProvider provider;
	    if (fPart != null) {
	        provider = fPart.getSite();
	    } else {
	        provider = new IShellProvider() {
	            public Shell getShell() {
	                return JDIDebugUIPlugin.getActiveWorkbenchShell();
	            }
	        };
        }
		PropertyDialogAction propertyAction= 
			new PropertyDialogAction(provider, new ISelectionProvider() {
				public void addSelectionChangedListener(ISelectionChangedListener listener) {
				}
				public ISelection getSelection() {
					return new StructuredSelection(fBreakpoint);
				}
				public void removeSelectionChangedListener(ISelectionChangedListener listener) {
				}
				public void setSelection(ISelection selection) {
				}
			});
		propertyAction.run();
	}

	/**
	 * @see IActionDelegate#selectionChanged(IAction, ISelection)
	 */
	public void selectionChanged(IAction action, ISelection selection) {
		if (selection instanceof IStructuredSelection) {
			IStructuredSelection ss= (IStructuredSelection)selection;
			if (ss.isEmpty() || ss.size() > 1) {
				return;
			}
			Object element= ss.getFirstElement();
			if (element instanceof IJavaBreakpoint) {
				setBreakpoint((IJavaBreakpoint)element);
			}
		}
	}

	/**
	 * Allows the underlying breakpoint for the properties page to be set
	 * @param breakpoint
	 */
	public void setBreakpoint(IJavaBreakpoint breakpoint) {
		fBreakpoint = breakpoint;
	}
	
	/**
	 * @see IObjectActionDelegate#setActivePart(IAction, IWorkbenchPart)
	 */
	public void setActivePart(IAction action, IWorkbenchPart targetPart) {
		fPart = targetPart;
	}
}