ListParagraph.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / MS / Internal / PtsHost / ListParagraph.cs / 1305600 / ListParagraph.cs
                        
                        
                            //---------------------------------------------------------------------------- 
//
// Copyright (C) Microsoft Corporation.  All rights reserved.
//
// File: ListParagraph.cs 
//
// Description: ListParagraph represents collection of list items. 
// 
// History:
//  06/06/2003 : [....] - moving from Avalon branch. 
//
//---------------------------------------------------------------------------
#pragma warning disable 1634, 1691  // avoid generating warnings about unknown
                                    // message numbers and unknown pragmas for PRESharp contol 

using System; 
using System.Diagnostics; 
using System.Windows;
using System.Windows.Documents; 
using MS.Internal.Text;

namespace MS.Internal.PtsHost
{ 
    /// 
    /// ListParagraph represents collection of list items. 
    ///  
    internal sealed class ListParagraph : ContainerParagraph
    { 
        /// 
        /// Constructor.
        /// 
        ///  
        /// Element associated with paragraph.
        ///  
        ///  
        /// Content's structural cache
        ///  
        internal ListParagraph(DependencyObject element, StructuralCache structuralCache)
            : base(element, structuralCache)
        {
        } 

        ///  
        /// CreateParaclient 
        /// 
        ///  
        /// OUT: opaque to PTS paragraph client
        /// 
        internal override void CreateParaclient(
            out IntPtr paraClientHandle) 
        {
#pragma warning disable 6518 
            // Disable PRESharp warning 6518. ListParaClient is an UnmamangedHandle, that adds itself 
            // to HandleMapper that holds a reference to it. PTS manages lifetime of this object, and
            // calls DestroyParaclient to get rid of it. DestroyParaclient will call Dispose() on the object 
            // and remove it from HandleMapper.
            ListParaClient paraClient =  new ListParaClient(this);
            paraClientHandle = paraClient.Handle;
#pragma warning restore 6518 
        }
 
        ///  
        /// Determine paragraph type at the current TextPointer and
        /// create it. Only ListItem elements are considered. Any other 
        /// content is skipped.
        /// 
        /// 
        /// TextPointer at which paragraph is to be created 
        /// 
        ///  
        /// True if empty paragraph is acceptable 
        /// 
        ///  
        /// BaseParagraph that was created
        /// 
        protected override BaseParagraph GetParagraph(ITextPointer textPointer, bool fEmptyOk)
        { 
            Invariant.Assert(textPointer is TextPointer);
 
            BaseParagraph paragraph = null; 

            while (paragraph == null) 
            {
                TextPointerContext runType = textPointer.GetPointerContext(LogicalDirection.Forward);
                if (runType == TextPointerContext.ElementStart)
                { 
                    TextElement element = ((TextPointer)textPointer).GetAdjacentElementFromOuterPosition(LogicalDirection.Forward);
                    if (element is ListItem) 
                    { 
                        //
 



 

 
                        paragraph = new ListItemParagraph(element, StructuralCache); 
                        break;
                    } 
                    else if (element is List)
                    {
                        //
 

 
 

 

                        paragraph = new ListParagraph(element, StructuralCache);
                        break;
                    } 
                    // Skip all elements, which are not valid list item children
                    if (((TextPointer)textPointer).IsFrozen) 
                    { 
                        // Need to clone TextPointer before moving it.
                        textPointer = textPointer.CreatePointer(); 
                    }
                    textPointer.MoveToPosition(element.ElementEnd);
                }
                else if (runType == TextPointerContext.ElementEnd) 
                {
                    // End of list, if the same as Owner of associated element 
                    // Skip content otherwise 
                    if (Element == ((TextPointer)textPointer).Parent)
                    { 
                        break;
                    }
                    if (((TextPointer)textPointer).IsFrozen)
                    { 
                        // Need to clone TextPointer before moving it.
                        textPointer = textPointer.CreatePointer(); 
                    } 
                    textPointer.MoveToNextContextPosition(LogicalDirection.Forward);
                } 
                else
                {
                    // Skip content
                    if (((TextPointer)textPointer).IsFrozen) 
                    {
                        // Need to clone TextPointer before moving it. 
                        textPointer = textPointer.CreatePointer(); 
                    }
                    textPointer.MoveToNextContextPosition(LogicalDirection.Forward); 
                }
            }

            if (paragraph != null) 
            {
                StructuralCache.CurrentFormatContext.DependentMax = (TextPointer)textPointer; 
            } 

            return paragraph; 
        }
    }
}
 
#pragma warning enable 1634, 1691
 

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

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