TreeIterator.cs source code in C# .NET

                        Code:
                         / Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / fx / src / Data / System / NewXml / TreeIterator.cs / 1 / TreeIterator.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
// [....]
// [....] 
//----------------------------------------------------------------------------- 
namespace System.Xml {
    using System; 
    using System.Data;
    using System.Diagnostics;

    // Iterates over non-attribute nodes 
    internal sealed class TreeIterator : BaseTreeIterator {
        private XmlNode         nodeTop; 
        private XmlNode         currentNode; 

        internal TreeIterator( XmlNode nodeTop ) : base( ((XmlDataDocument)(nodeTop.OwnerDocument)).Mapper ) { 
            Debug.Assert( nodeTop != null );
            this.nodeTop     = nodeTop;
            this.currentNode = nodeTop;
        } 

        internal override void Reset() { 
            currentNode = nodeTop; 
        }
 
        internal override XmlNode CurrentNode {
            get {
                return currentNode;
            } 
        }
 
        internal override bool Next() { 
            XmlNode nextNode;
 
            // Try to move to the first child
            nextNode = currentNode.FirstChild;

            // No children, try next sibling 
            if ( nextNode != null ) {
                currentNode = nextNode; 
                return true; 
            }
            return NextRight(); 
        }

        internal override bool NextRight() {
            // Make sure we do not get past the nodeTop if we call NextRight on a just initialized iterator and nodeTop has no children 
            if ( currentNode == nodeTop ) {
                currentNode = null; 
                return false; 
            }
 
            XmlNode nextNode = currentNode.NextSibling;

            if ( nextNode != null ) {
                currentNode = nextNode; 
                return true;
            } 
 
            // No next sibling, try the first sibling of from the parent chain
            nextNode = currentNode; 
            while ( nextNode != nodeTop && nextNode.NextSibling == null )
                nextNode = nextNode.ParentNode;

            if ( nextNode == nodeTop ) { 
                currentNode = null;
                return false; 
            } 

            currentNode = nextNode.NextSibling; 
            Debug.Assert( currentNode != null );
            return true;
        }
    } 
}
 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
// [....]
// [....] 
//----------------------------------------------------------------------------- 
namespace System.Xml {
    using System; 
    using System.Data;
    using System.Diagnostics;

    // Iterates over non-attribute nodes 
    internal sealed class TreeIterator : BaseTreeIterator {
        private XmlNode         nodeTop; 
        private XmlNode         currentNode; 

        internal TreeIterator( XmlNode nodeTop ) : base( ((XmlDataDocument)(nodeTop.OwnerDocument)).Mapper ) { 
            Debug.Assert( nodeTop != null );
            this.nodeTop     = nodeTop;
            this.currentNode = nodeTop;
        } 

        internal override void Reset() { 
            currentNode = nodeTop; 
        }
 
        internal override XmlNode CurrentNode {
            get {
                return currentNode;
            } 
        }
 
        internal override bool Next() { 
            XmlNode nextNode;
 
            // Try to move to the first child
            nextNode = currentNode.FirstChild;

            // No children, try next sibling 
            if ( nextNode != null ) {
                currentNode = nextNode; 
                return true; 
            }
            return NextRight(); 
        }

        internal override bool NextRight() {
            // Make sure we do not get past the nodeTop if we call NextRight on a just initialized iterator and nodeTop has no children 
            if ( currentNode == nodeTop ) {
                currentNode = null; 
                return false; 
            }
 
            XmlNode nextNode = currentNode.NextSibling;

            if ( nextNode != null ) {
                currentNode = nextNode; 
                return true;
            } 
 
            // No next sibling, try the first sibling of from the parent chain
            nextNode = currentNode; 
            while ( nextNode != nodeTop && nextNode.NextSibling == null )
                nextNode = nextNode.ParentNode;

            if ( nextNode == nodeTop ) { 
                currentNode = null;
                return false; 
            } 

            currentNode = nextNode.NextSibling; 
            Debug.Assert( currentNode != null );
            return true;
        }
    } 
}
 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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TreeIterator.cs source code in C# .NET

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