DirtyTextRange.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 / MS / Internal / PtsHost / DirtyTextRange.cs / 1305600 / DirtyTextRange.cs
                        

                        
                            //---------------------------------------------------------------------------- 
//
// Copyright (C) Microsoft Corporation.  All rights reserved.
//
// File: DirtyTextRange.cs 
//
// Description: Dirty text range describes change in the TextContainer. 
// 
// History:
//  06/06/2003 : [....] - created. 
//
//---------------------------------------------------------------------------

using System; 
using System.Windows.Controls;
using System.Windows.Documents; 
 
namespace MS.Internal.PtsHost
{ 
    // ---------------------------------------------------------------------
    // Dirty text range describes change in the TextContainer.
    // ---------------------------------------------------------------------
    internal struct DirtyTextRange 
    {
        // ------------------------------------------------------------------ 
        // Constructor 
        //
        //      startIndex - Index of the starting position of the change. 
        //      positionsAdded - Number of characters added.
        //      positionsRemoved - Number of characters removed.
        // -----------------------------------------------------------------
        internal DirtyTextRange(int startIndex, int positionsAdded, int positionsRemoved) 
        {
            StartIndex = startIndex; 
            PositionsAdded = positionsAdded; 
            PositionsRemoved = positionsRemoved;
        } 

        // ------------------------------------------------------------------
        // Constructor
        // 
        //      change - TextContainer change data.
        // ------------------------------------------------------------------ 
        internal DirtyTextRange(TextContainerChangeEventArgs change) 
        {
            StartIndex = change.ITextPosition.Offset; 

            PositionsAdded = 0;
            PositionsRemoved = 0;
 
            switch (change.TextChange)
            { 
                case TextChangeType.ContentAdded: 
                    PositionsAdded = change.Count;
                    break; 

                case TextChangeType.ContentRemoved:
                    PositionsRemoved = change.Count;
                    break; 

                case TextChangeType.PropertyModified: 
                    PositionsAdded = change.Count; 
                    PositionsRemoved = change.Count;
                    break; 
            }
        }

        // ----------------------------------------------------------------- 
        // Index of the starting position of the change.
        // ------------------------------------------------------------------ 
        internal int StartIndex; 

        // ----------------------------------------------------------------- 
        // Number of characters added.
        // -----------------------------------------------------------------
        internal int PositionsAdded;
 
        // -----------------------------------------------------------------
        // Number of characters removed. 
        // ------------------------------------------------------------------ 
        internal int PositionsRemoved;
    } 
}

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

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