/*

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

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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: 

*

*/

function ContainerExtPropertyExtender() {

}

	// Return instances that may provide extension properties

	// The target instance parameter is the instance to receive the

	// additional properties

ContainerExtPropertyExtender.prototype.getPropertyExtenders = function(instance, targetInstance) {

	var result = null;

	if (targetInstance == instance) {

		result = [instance.parent];

	}

	else if (targetInstance.parent == instance) {

		// Add container's extension properties and those of a known child component, if present

		var extendingInstance = findImmediateChildByComponentID(instance.children, "com.nokia.examples.extensionChild");

		if (extendingInstance == null)

			extendingInstance = findImmediateChildByComponentID(instance.children, "com.nokia.examples.extensionChildMultiple");

		if (targetInstance != extendingInstance) {

			result = [instance];

			if (extendingInstance != null) {

				result[1] = extendingInstance;

			}

		}

	}

	return result;

}

ContainerExtPropertyExtender.prototype.getExtensionSetNames = function(thisInstance, targetInstance) {

	if (thisInstance.properties.controlConditionalExtensions)

		return [ "default", "extra"];

	else 

		return [ "default" ];

}

function findImmediateChildByComponentID(children, componentID) {

    var result = null;

	for (var i in children) {

		if (children[i].componentId == componentID) {

			result = children[i];

			break;

		}

	}

	return result;

}

ContainerExtPropertyExtender.prototype.propertyChanged = function(instance, propertyID, laf) {

	if (propertyID == "controlConditionalExtensions" && instance.children != null) {

	    var children = instance.children;

	    for (var i in children) {

	    	var child = children[i];

	    	child.updatePropertySource();

	    }

	}

}