/AjaxMinDll/JavaScript/while.cs

// while.cs

//

// Copyright 2010 Microsoft Corporation

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//     http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.



using System.Collections.Generic;



namespace Microsoft.Ajax.Utilities

{

    public sealed class WhileNode : IterationStatement

    {

        private AstNode m_condition;



        public AstNode Condition

        {

            get { return m_condition; }

            set

            {

                ReplaceNode(ref m_condition, value);

            }

        }



        public override Context TerminatingContext

        {

            get

            {

                // if we have one, return it. If not, return what the body has (if any)

                return base.TerminatingContext ?? Body.IfNotNull(b => b.TerminatingContext);

            }

        }



        public WhileNode(Context context)

            : base(context)

        {

        }



        public override void Accept(IVisitor visitor)

        {

            if (visitor != null)

            {

                visitor.Visit(this);

            }

        }



        public override IEnumerable<AstNode> Children

        {

            get

            {

                return EnumerateNonNullNodes(Condition, Body);

            }

        }



        public override bool ReplaceChild(AstNode oldNode, AstNode newNode)

        {

            if (Condition == oldNode)

            {

                Condition = newNode;

                return true;

            }

            if (Body == oldNode)

            {

                Body = ForceToBlock(newNode);

                return true;

            }

            return false;

        }



        internal override bool EncloseBlock(EncloseBlockType type)

        {

            // pass the query on to the body

            return Body == null ? false : Body.EncloseBlock(type);

        }

    }

}