RtfFormatStack.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 / Documents / RtfFormatStack.cs / 1305600 / RtfFormatStack.cs
                        

                        
                            //---------------------------------------------------------------------------- 
//
// File: RtfFormatStack.cs
//
// Copyright (C) Microsoft Corporation.  All rights reserved. 
//
// Description: Rtf format stack. 
// 
//---------------------------------------------------------------------------
 
using System.Collections;
using MS.Internal; // Invariant

namespace System.Windows.Documents 
{
    ///  
    /// RtfFormatStack 
    /// 
    internal class RtfFormatStack : ArrayList 
    {
        //-----------------------------------------------------
        //
        //  Constructors 
        //
        //----------------------------------------------------- 
 
        #region Constructors
 
        internal RtfFormatStack() : base(20)
        {
        }
 
        #endregion Constructors
 
        //------------------------------------------------------ 
        //
        //  Internal Methods 
        //
        //-----------------------------------------------------

        #region Internal Methods 

        internal void Push() 
        { 
            FormatState previousFormatState = Top();
            FormatState formatState; 

            formatState = previousFormatState != null ? new FormatState(previousFormatState) : new FormatState();

            Add(formatState); 
        }
 
        internal void Pop() 
        {
            Invariant.Assert(Count != 0); 

            if (Count > 0)
            {
                RemoveAt(Count - 1); 
            }
        } 
 
        internal FormatState Top()
        { 
            return Count > 0 ? EntryAt(Count - 1) : null;
        }

        internal FormatState PrevTop(int fromTop) 
        {
            int index = Count - 1 - fromTop; 
 
            if (index < 0 || index >= Count)
            { 
                return null;
            }

            return EntryAt(index); 
        }
 
        internal FormatState EntryAt(int index) 
        {
            return (FormatState)this[index]; 
        }

        #endregion Internal Methods
    } 
}

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

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