/*

 * Copyright (c) 2009-2010 Nokia Corporation and/or its subsidiary(-ies). 

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description:

 *

 * Handler for delete command

 *

 */

package com.nokia.tracebuilder.action;

import com.nokia.tracebuilder.engine.LastKnownLocation;

import com.nokia.tracebuilder.engine.LastKnownLocationList;

import com.nokia.tracebuilder.engine.TraceBuilderGlobals;

import com.nokia.tracebuilder.engine.TraceBuilderHelp;

import com.nokia.tracebuilder.engine.TraceLocation;

import com.nokia.tracebuilder.model.Trace;

import com.nokia.tracebuilder.model.TraceBuilderException;

import com.nokia.tracebuilder.model.TraceConstantTable;

import com.nokia.tracebuilder.model.TraceConstantTableEntry;

import com.nokia.tracebuilder.model.TraceGroup;

import com.nokia.tracebuilder.model.TraceObject;

import com.nokia.tracebuilder.model.TraceParameter;

import com.nokia.tracebuilder.project.GroupNameHandlerBase;

import com.nokia.tracebuilder.rules.ReadOnlyObjectRule;

import com.nokia.tracebuilder.rules.TraceParameterRestrictionRule;

/**

 * Handler for delete command

 * 

 */

final class DeleteAction extends TraceBuilderAction {

	/**

	 * Constructor

	 */

	DeleteAction() {

		setText(Messages.getString("DeleteAction.Title")); //$NON-NLS-1$

		setToolTipText(Messages.getString("DeleteAction.Tooltip")); //$NON-NLS-1$

		setDefaultProperties(ActionIDs.DELETE_ACTION_ID,

				TraceBuilderHelp.DELETE_OBJECT_HELP_CONTEXT);

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see org.eclipse.jface.action.IAction#run()

	 */

	@Override

	public void doRun() throws TraceBuilderException {

		TraceBuilderGlobals.getTraceBuilder().delete();

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see

	 * com.nokia.tracebuilder.action.TraceBuilderAction#getEnabledFlag(java.

	 * lang.Object)

	 */

	@Override

	protected boolean getEnabledFlag(Object selectedObject) {

		boolean retval;

		selectedObject = locationToTrace(selectedObject);

		if (selectedObject instanceof TraceGroup) {

			setText(Messages.getString("ActionFactory.DeleteGroupAction")); //$NON-NLS-1$

			retval = true;

		} else if (selectedObject instanceof Trace) {

			setText(Messages.getString("ActionFactory.DeleteTraceAction")); //$NON-NLS-1$

			retval = true;

		} else if (selectedObject instanceof TraceParameter) {

			TraceParameter selectedParameter = (TraceParameter) selectedObject;

			Trace owner = selectedParameter.getTrace();

			TraceParameterRestrictionRule restriction = owner

					.getExtension(TraceParameterRestrictionRule.class);

			ReadOnlyObjectRule readOnly = owner

					.getExtension(ReadOnlyObjectRule.class);

			if (readOnly != null

					|| (restriction != null && !restriction

							.canRemoveParameters())) {

				setText(Messages.getString("DeleteAction.Title")); //$NON-NLS-1$

				retval = false;

			} else {

				setText(Messages

						.getString("ActionFactory.DeleteParameterAction")); //$NON-NLS-1$

				// If there are last known locations, source file is not open

				// and parameters cannot be deleted

				LastKnownLocationList list = owner

						.getExtension(LastKnownLocationList.class);

				String groupName = owner.getGroup().getName();

				// Only optional 32-bit instance identifier can be deleted from

				// State Trace

				GroupNameHandlerBase groupNameHandler = TraceBuilderGlobals

						.getGroupNameHandler();

				boolean isStateTrace = groupName.equals(groupNameHandler

						.getDefaultGroups()[groupNameHandler

						.getStateGroupIdIndex()]);

				if ((list != null && list.hasLocations())

						|| (isStateTrace && selectedParameter.getType().equals(

								TraceParameter.ASCII))) {

					retval = false;

				} else {

					retval = true;

				}

			}

		} else if (selectedObject instanceof TraceConstantTable) {

			if (!((TraceConstantTable) selectedObject).hasParameterReferences()) {

				setText(Messages

						.getString("ActionFactory.DeleteConstantTableAction")); //$NON-NLS-1$

				retval = true;

			} else {

				setText(Messages.getString("DeleteAction.ConstantTableInUse")); //$NON-NLS-1$

				retval = false;

			}

		} else if (selectedObject instanceof TraceConstantTableEntry) {

			setText(Messages.getString("ActionFactory.DeleteConstantAction")); //$NON-NLS-1$

			retval = true;

		} else {

			setText(Messages.getString("DeleteAction.Title")); //$NON-NLS-1$

			retval = false;

		}

		return retval;

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see

	 * com.nokia.tracebuilder.action.TraceBuilderAction#isInPopupMenu(java.lang

	 * .Object)

	 */

	@Override

	protected boolean isInPopupMenu(Object selectedObject) {

		Object parent = locationToTrace(selectedObject);

		return isEnabled() && (parent instanceof TraceObject)

				&& !(selectedObject instanceof TraceLocation)

				&& !(selectedObject instanceof LastKnownLocation);

	}

}