ListParaClient.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / MS / Internal / PtsHost / ListParaClient.cs / 1305600 / ListParaClient.cs
                        
                        
                            //---------------------------------------------------------------------------- 
//
// Copyright (C) Microsoft Corporation.  All rights reserved.
//
// File: ListParaClient.cs 
//
// Description: ListParaClient is responsible for handling display 
//              related data of list paragraphs. 
//
// History: 
//  02/07/2004 : ghermann - created.
//
//---------------------------------------------------------------------------
 
using System;
using System.Diagnostics; 
using System.Security; 
using System.Windows;
using System.Windows.Media; 
using System.Windows.Documents;
using MS.Internal.Documents;
using MS.Internal.Text;
 
using MS.Internal.PtsHost.UnsafeNativeMethods;
 
namespace MS.Internal.PtsHost 
{
 
    /// 
    /// ListParaClient is responsible for handling display related data
    /// of break paragraphs.
    ///  
    internal sealed class ListParaClient : ContainerParaClient
    { 
        ///  
        /// Constructor.
        ///  
        /// 
        /// ListParagraph associated with this para client.
        /// 
        internal ListParaClient(ListParagraph paragraph) : base(paragraph) 
        {
        } 
 
        /// 
        /// Validate visual node associated with paragraph. 
        /// 
        /// 
        /// Inherited update info
        ///  
        /// 
        /// Critical - as this calls Critical function PTS.FsQuerySubtrackDetails 
        ///            and some PtsHelper functions. 
        /// Safe - operation is safe and method doesn't disclose any information got through critical calls
        ///  
        [SecurityCritical, SecurityTreatAsSafe]
        internal override void ValidateVisual(PTS.FSKUPDATE fskupdInherited)
        {
            // Query paragraph details 
            PTS.FSSUBTRACKDETAILS subtrackDetails;
            PTS.Validate(PTS.FsQuerySubtrackDetails(PtsContext.Context, _paraHandle.Value, out subtrackDetails)); 
 
            // Draw border and background info.
            MbpInfo mbp = MbpInfo.FromElement(Paragraph.Element); 
            if (ThisFlowDirection != PageFlowDirection)
            {
                mbp.MirrorBP();
            } 

            uint fswdir = PTS.FlowDirectionToFswdir((FlowDirection)Paragraph.Element.GetValue(FrameworkElement.FlowDirectionProperty)); 
 
            Brush backgroundBrush = (Brush)Paragraph.Element.GetValue(TextElement.BackgroundProperty);
 
            TextProperties textProperties = new TextProperties(Paragraph.Element, StaticTextPointer.Null, false /* inline objects */, false /* get background */);

            // There might be possibility to get empty sub-track, skip the sub-track in such case.
            if (subtrackDetails.cParas != 0) 
            {
                PTS.FSPARADESCRIPTION [] arrayParaDesc; 
                PtsHelper.ParaListFromSubtrack(PtsContext, _paraHandle.Value, ref subtrackDetails, out arrayParaDesc); 

                using(DrawingContext ctx = _visual.RenderOpen()) 
                {
                    _visual.DrawBackgroundAndBorderIntoContext(ctx, backgroundBrush, mbp.BorderBrush, mbp.Border, _rect.FromTextDpi(), IsFirstChunk, IsLastChunk);

                        // Get list of paragraphs 
                    ListMarkerLine listMarkerLine = new ListMarkerLine(Paragraph.StructuralCache.TextFormatterHost, this);
                    int indexFirstParaInSubtrack = 0; 
 
                    for(int index = 0; index < subtrackDetails.cParas; index++)
                    { 
                        List list = Paragraph.Element as List;

                        BaseParaClient listItemParaClient = PtsContext.HandleToObject(arrayParaDesc[index].pfsparaclient) as BaseParaClient;
                        PTS.ValidateHandle(listItemParaClient); 

                        if(index == 0) 
                        { 
                            indexFirstParaInSubtrack = list.GetListItemIndex(listItemParaClient.Paragraph.Element as ListItem);
                        } 

                        if(listItemParaClient.IsFirstChunk)
                        {
                            int dvBaseline = listItemParaClient.GetFirstTextLineBaseline(); 

                            if(PageFlowDirection != ThisFlowDirection) 
                            { 
                                ctx.PushTransform(new MatrixTransform(-1.0, 0.0, 0.0, 1.0, TextDpi.FromTextDpi(2 * listItemParaClient.Rect.u + listItemParaClient.Rect.du), 0.0));
                            } 

                            int adjustedIndex;
                            if (int.MaxValue - index < indexFirstParaInSubtrack)
                            { 
                                adjustedIndex = int.MaxValue;
                            } 
                            else 
                            {
                                adjustedIndex = indexFirstParaInSubtrack + index; 
                            }
                            LineProperties lineProps = new LineProperties(Paragraph.Element, Paragraph.StructuralCache.FormattingOwner, textProperties, new MarkerProperties(list, adjustedIndex));
                            listMarkerLine.FormatAndDrawVisual(ctx, lineProps, listItemParaClient.Rect.u, dvBaseline);
 
                            if(PageFlowDirection != ThisFlowDirection)
                            { 
                                ctx.Pop(); 
                            }
                        } 
                    }


                    listMarkerLine.Dispose(); 
                }
 
                // Render list of paragraphs 
                PtsHelper.UpdateParaListVisuals(PtsContext, _visual.Children, fskupdInherited, arrayParaDesc);
            } 
            else
            {
                _visual.Children.Clear();
            } 

        } 
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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ListParaClient.cs source code in C# .NET

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