CellParagraph.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / MS / Internal / PtsHost / CellParagraph.cs / 1305600 / CellParagraph.cs
                        
                        
                            //---------------------------------------------------------------------------- 
//
// Copyright (C) Microsoft Corporation.  All rights reserved.
//
// File: CellParagraph.cs 
//
// Description: CellParagraph represents a single list item. 
// 
// History:
//  06/01/2004 : [....] - moving from Avalon branch. 
//
//---------------------------------------------------------------------------

using System; 
using System.Diagnostics;
using System.Security; 
using System.Windows; 
using System.Windows.Documents;
using MS.Internal.PtsHost; 
using MS.Internal.Text;
using MS.Internal.PtsHost.UnsafeNativeMethods;

namespace MS.Internal.PtsHost 
{
    // --------------------------------------------------------------------- 
    // CellParagraph represents a single cell. 
    // ---------------------------------------------------------------------
    internal sealed class CellParagraph : SubpageParagraph 
    {
        // ------------------------------------------------------------------
        // Constructor.
        // 
        //      element - Element associated with paragraph.
        //      structuralCache - Content's structural cache 
        // ----------------------------------------------------------------- 
        internal CellParagraph(DependencyObject element, StructuralCache structuralCache)
            : base(element, structuralCache) 
        {
            _isInterruptible = false;
        }
 
        /// 
        /// Table owner accessor 
        ///  
        internal TableCell Cell { get { return (TableCell)Element; } }
 
        /// 
        /// FormatCellFinite
        /// 
        /// Table para client 
        /// Subpage break record - not NULL if cell broken from previous page/column
        /// Footnote rejector 
        /// Allow empty cell 
        /// Table direction
        /// Available vertical space 
        /// Formatting result
        /// Cell para client
        /// Break record for the current cell
        /// Ised vertical space 
        /// 
        /// Critical - as this calls Critical function CellParaClient.FormatCellFinite. 
        ///  
        [SecurityCritical]
        internal void FormatCellFinite( 
            TableParaClient tableParaClient,        // IN:
            IntPtr pfsbrkcellIn,                    // IN:  not NULL if cell broken from previous page/column
            IntPtr pfsFtnRejector,                  // IN:
            int fEmptyOK,                           // IN: 
            uint fswdirTable,                       // IN:
            int dvrAvailable,                       // IN: 
            out PTS.FSFMTR pfmtr,                   // OUT: 
            out IntPtr ppfscell,                    // OUT: cell object
            out IntPtr pfsbrkcellOut,               // OUT: break if cell does not fit in dvrAvailable 
            out int dvrUsed)                        // OUT: height -- min height required

        {
            Debug.Assert(Cell.Index != -1 && Cell.ColumnIndex != -1, 
                "Cell is not in a table");
 
            CellParaClient cellParaClient; 
            Size subpageSize;
 
            Debug.Assert(Cell.Table != null);

            cellParaClient = new CellParaClient(this, tableParaClient);
 
            subpageSize = new Size(
                cellParaClient.CalculateCellWidth(tableParaClient), 
                Math.Max(TextDpi.FromTextDpi(dvrAvailable), 0)); 

 
            cellParaClient.FormatCellFinite(subpageSize,
                                            pfsbrkcellIn,
                                            PTS.ToBoolean(fEmptyOK),
                                            fswdirTable, 
                                            PTS.FSKSUPPRESSHARDBREAKBEFOREFIRSTPARA.fsksuppresshardbreakbeforefirstparaNone,
                                            out pfmtr, 
                                            out dvrUsed, 
                                            out pfsbrkcellOut);
 
            //  initialize output parameters
            ppfscell = cellParaClient.Handle;

            if(pfmtr.kstop == PTS.FSFMTRKSTOP.fmtrNoProgressOutOfSpace) 
            {
                cellParaClient.Dispose(); 
                ppfscell = IntPtr.Zero; 
                dvrUsed = 0;
            } 

            if (dvrAvailable < dvrUsed)
            {
                if (PTS.ToBoolean(fEmptyOK)) 
                {
                    if (cellParaClient != null)     { cellParaClient.Dispose(); } 
                    if (pfsbrkcellOut != IntPtr.Zero) 
                    {
                        PTS.Validate(PTS.FsDestroySubpageBreakRecord(cellParaClient.PtsContext.Context, pfsbrkcellOut), cellParaClient.PtsContext); 
                        pfsbrkcellOut = IntPtr.Zero;
                    }

                    ppfscell = IntPtr.Zero; 
                    pfmtr.kstop = PTS.FSFMTRKSTOP.fmtrNoProgressOutOfSpace;
                    dvrUsed = 0; 
                } 
                else
                { 
                    pfmtr.fForcedProgress = PTS.True;
                }
            }
        } 

        ///  
        /// FormatCellBottomless 
        /// 
        /// Table para client 
        /// Flow direction
        /// Formatting result
        /// Cell para client
        /// Height consumed 
        internal void FormatCellBottomless(
            TableParaClient tableParaClient,    // IN: 
            uint fswdirTable,                   // IN: 
            out PTS.FSFMTRBL fmtrbl,            // OUT:
            out IntPtr ppfscell,                // OUT: cell object 
            out int dvrUsed)                    // OUT: height -- min height
                                                //      required
        {
            Debug.Assert(Cell.Index != -1 && Cell.ColumnIndex != -1, 
                "Cell is not in a table");
 
            Debug.Assert(Cell.Table != null); 

            CellParaClient cellParaClient = new CellParaClient(this, tableParaClient); 

            cellParaClient.FormatCellBottomless(fswdirTable, cellParaClient.CalculateCellWidth(tableParaClient), out fmtrbl, out dvrUsed);

 
            //  initialize output parameters
            ppfscell = cellParaClient.Handle; 
        } 

        ///  
        /// UpdateBottomlessCell
        /// 
        /// Current cell para client
        /// Table para cleint 
        /// Flow direction
        /// Formatting result 
        /// Height consumed 
        internal void UpdateBottomlessCell(
            CellParaClient cellParaClient,          // IN: 
            TableParaClient tableParaClient,        // IN:
            uint fswdirTable,                       // IN:
            out PTS.FSFMTRBL fmtrbl,                // OUT:
            out int dvrUsed)                        // OUT: height -- min height required 
        {
            Debug.Assert(Cell.Index != -1 && Cell.ColumnIndex != -1, 
                "Cell is not in a table"); 

            Debug.Assert(Cell.Table != null); 

            cellParaClient.UpdateBottomlessCell(fswdirTable, cellParaClient.CalculateCellWidth(tableParaClient), out fmtrbl, out dvrUsed);
        }
 
        /// 
        /// SetCellHeight 
        ///  
        /// Cell para client
        /// Table para client 
        /// Break record if cell is broken
        /// Cell broken on this page/column
        /// Flow direction
        /// Actual height 
        internal void SetCellHeight(
            CellParaClient cellParaClient,          // IN: cell object 
            TableParaClient tableParaClient,        // table's para client 
            IntPtr subpageBreakRecord,              // not NULL if cell broken from previous page/column
            int fBrokenHere,                        // TRUE if cell broken on this page/column: no reformatting 
            uint fswdirTable,
            int dvrActual)
        {
            cellParaClient.ArrangeHeight = TextDpi.FromTextDpi(dvrActual); 
        }
 
 
        /// 
        /// UpdGetCellChange 
        /// 
        /// Indication that cell's width changed
        /// 
        /// Change kind. One of: None, New, Inside 
        /// 
        internal void UpdGetCellChange( 
            out int fWidthChanged,                  // OUT: 
            out PTS.FSKCHANGE fskchCell)            // OUT:
        { 
            //  calculate state change
            fWidthChanged = PTS.True;
            fskchCell = PTS.FSKCHANGE.fskchNew;
        } 

 
    } 
}
 

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

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