UpdateRecord.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 / UpdateRecord.cs / 1305600 / UpdateRecord.cs
                        

                        
                            //---------------------------------------------------------------------------- 
//
// Copyright (C) Microsoft Corporation.  All rights reserved.
//
// File: UpdateRecord.cs 
//
// Description: Contains information about current state of upate process 
//              in the current container paragraph. 
//
// History: 
//  05/05/2003 : [....] - moving from Avalon branch.
//
//---------------------------------------------------------------------------
 
using System;
using System.Diagnostics; 
 
using MS.Internal.PtsHost.UnsafeNativeMethods;
 
namespace MS.Internal.PtsHost
{
    // ---------------------------------------------------------------------
    // Contains information about current state of upate process in the 
    // current container paragraph.
    // --------------------------------------------------------------------- 
    internal sealed class UpdateRecord 
    {
        // ------------------------------------------------------------------ 
        // Constructor
        // -----------------------------------------------------------------
        internal UpdateRecord()
        { 
            Dtr = new DirtyTextRange(0,0,0);
            FirstPara = SyncPara = null; 
            ChangeType = PTS.FSKCHANGE.fskchNone; 
            Next = null;
            InProcessing = false; 
        }

        // ------------------------------------------------------------------
        // Merge with next update record. 
        // ------------------------------------------------------------------
        internal void MergeWithNext() 
        { 
            Debug.Assert(Next != null); // This is the last UR, cannot merge with next.
 
            // Merge DTRs
            int delta = Next.Dtr.StartIndex - Dtr.StartIndex;

            // Dtr.StartIndex is not changing 
            Dtr.PositionsAdded   += delta + Next.Dtr.PositionsAdded;
            Dtr.PositionsRemoved += delta + Next.Dtr.PositionsRemoved; 
 
            // Reasign [....] point and next UpdateRecord
            SyncPara = Next.SyncPara; 
            Next     = Next.Next;
        }

        // ----------------------------------------------------------------- 
        // Dirty text range.
        // ------------------------------------------------------------------ 
        internal DirtyTextRange Dtr; 

        // ----------------------------------------------------------------- 
        // The first paragraph affected by the change.
        // -----------------------------------------------------------------
        internal BaseParagraph FirstPara;
 
        // -----------------------------------------------------------------
        // The first paragraph not affected by DTR, synchronization point for 
        // update process. 
        // ------------------------------------------------------------------
        internal BaseParagraph SyncPara; 

        // -----------------------------------------------------------------
        // Type of the change (none, new, inside).
        // ------------------------------------------------------------------ 
        internal PTS.FSKCHANGE ChangeType;
 
        // ------------------------------------------------------------------ 
        // Next UpdateRecord.
        // ----------------------------------------------------------------- 
        internal UpdateRecord Next;

        // ------------------------------------------------------------------
        // Update record is in processing mode? 
        // -----------------------------------------------------------------
        internal bool InProcessing; 
    } 
}

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

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