ParserStack.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / System / Windows / Markup / ParserStack.cs / 1305600 / ParserStack.cs
                        

                        
                            /****************************************************************************\ 
*
* File: ParserStack.cs
*
* Purpose:  ParserStack...once was in XamlReaderHelper.cs 
*
* History: 
*    11/21/08:    [....]      Moved from XamlReaderHelper.cs as we were replacing the parser. 
*
* Copyright (C) 2008 by Microsoft Corporation.  All rights reserved. 
*
\***************************************************************************/

using System; 
using System.Xml;
using System.Xml.Serialization; 
using System.IO; 
using System.Text;
using System.Collections; 
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Reflection; 
using System.Globalization;
using MS.Utility; 
using System.Collections.Specialized; 
using Microsoft.Win32;
using System.Runtime.InteropServices; 
using MS.Internal;
using System.Windows.Markup;

 
#if !PBTCOMPILER
 
using System.Windows; 
using System.Windows.Documents;
using System.Windows.Media; 
using System.Windows.Shapes;

#endif
 
#if PBTCOMPILER
namespace MS.Internal.Markup 
#else 
namespace System.Windows.Markup
#endif 
{

    /// 
    /// Parser Context stack 
    /// The built-in Stack class doesn't let you do things like look at nodes beyond the top of the stack...
    /// so we'll use this instead. Note that this is not a complete stack implementation -- if you try to 
    /// convert to array or some such, you'll be missing a couple elements. But this is plenty for our purposes. 
    /// Main goal is to track current/parent context with a minimum of overhead.
    /// This class is internal so it can be shared with the BamlRecordReader 
    /// 
    internal class ParserStack : ArrayList
    {
        ///  
        ///     Creates a default ParserStack
        ///  
        internal ParserStack() : base() 
        {
        } 

        /// 
        ///     Creates a clone.
        ///  
        private ParserStack(ICollection collection) : base(collection)
        { 
        } 

        #region StackOverrides 

        public void Push(object o)
        {
            Add(o); 
        }
 
        public object Pop() 
        {
            object o = this[Count - 1]; 
            RemoveAt(Count - 1);
            return o;
        }
 
#if !PBTCOMPILER
        public object Peek() 
        { 
            // Die if peeking on empty stack
            return this[Count - 1]; 
        }
#endif

        public override object Clone() 
        {
            return new ParserStack(this); 
        } 

        #endregion // StackOverrides 

        #region Properties

        ///  
        /// Returns the Current Context on the stack
        ///  
        internal object CurrentContext 
        {
            get { return Count > 0 ? this[Count - 1] : null; } 
        }

        /// 
        /// Returns the Parent of the Current Context 
        /// 
        internal object ParentContext 
        { 
            get { return Count > 1 ? this[Count - 2] : null; }
        } 

        /// 
        /// Returns the GrandParent of the Current Context
        ///  
        internal object GrandParentContext
        { 
            get { return Count > 2 ? this[Count - 3] : null; } 
        }
 
#if !PBTCOMPILER
        /// 
        /// Returns the GreatGrandParent of the Current Context
        ///  
        internal object GreatGrandParentContext
        { 
            get { return Count > 3 ? this[Count - 4] : null; } 
        }
#endif 

        #endregion // Properties

    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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