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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
//
//
// Description: Para client for cell
//
using MS.Internal.Text;
using MS.Internal.Documents;
using MS.Internal.PtsTable;
using System.Windows;
using System.Windows.Documents;
using System.Windows.Media;
using System.Collections.ObjectModel;
using MS.Internal.PtsHost.UnsafeNativeMethods;
namespace MS.Internal.PtsHost
{
/// <summary>
/// Para client for cell
/// </summary>
internal sealed class CellParaClient : SubpageParaClient
{
//------------------------------------------------------
//
// Constructors
//
//------------------------------------------------------
#region Constructors
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="cellParagraph">Cell paragraph.</param>
/// <param name="tableParaClient">Table paraclient.</param>
internal CellParaClient(CellParagraph cellParagraph, TableParaClient tableParaClient) : base(cellParagraph)
{
_tableParaClient = tableParaClient;
}
#endregion Constructors
//------------------------------------------------------
//
// Public Methods
//
//------------------------------------------------------
#region Public Methods
#endregion Public Methods
//------------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
#region Internal Methods
/// <summary>
/// Arrange.
/// </summary>
/// <param name="du">U offset component of the cell's visual.</param>
/// <param name="dv">V offset component of the cell's visual.</param>
/// <param name="rcTable">Table's rectangle.. (in page flow dir)</param>
/// <param name="tableFlowDirection">Table's flow direction</param>
/// <param name="pageContext">Page context</param>
internal void Arrange(int du, int dv, PTS.FSRECT rcTable, FlowDirection tableFlowDirection, PageContext pageContext)
{
//
// Determine cell width based on column widths.
//
CalculatedColumn[] calculatedColumns = _tableParaClient.CalculatedColumns;
Debug.Assert(calculatedColumns != null
&& (Cell.ColumnIndex + Cell.ColumnSpan) <= calculatedColumns.Length);
double durCellSpacing = Table.InternalCellSpacing;
double durCellWidth = -durCellSpacing;
// find the width sum of all columns the cell spans
int i = Cell.ColumnIndex + Cell.ColumnSpan - 1;
do
{
durCellWidth += calculatedColumns[i].DurWidth + durCellSpacing;
} while (--i >= ColumnIndex);
if(tableFlowDirection != PageFlowDirection)
{
PTS.FSRECT pageRect = pageContext.PageRect;
PTS.Validate(PTS.FsTransformRectangle(PTS.FlowDirectionToFswdir(PageFlowDirection), ref pageRect, ref rcTable, PTS.FlowDirectionToFswdir(tableFlowDirection), out rcTable));
}
_rect.u = du + rcTable.u;
_rect.v = dv + rcTable.v;
_rect.du = TextDpi.ToTextDpi(durCellWidth);
_rect.dv = TextDpi.ToTextDpi(_arrangeHeight);
if(tableFlowDirection != PageFlowDirection)
{
PTS.FSRECT pageRect = pageContext.PageRect;
PTS.Validate(PTS.FsTransformRectangle(PTS.FlowDirectionToFswdir(tableFlowDirection), ref pageRect, ref _rect, PTS.FlowDirectionToFswdir(PageFlowDirection), out _rect));
}
_flowDirectionParent = tableFlowDirection;
_flowDirection = (FlowDirection)Paragraph.Element.GetValue(FrameworkElement.FlowDirectionProperty);
_pageContext = pageContext;
OnArrange();
if(_paraHandle != IntPtr.Zero)
{
PTS.Validate(PTS.FsClearUpdateInfoInSubpage(PtsContext.Context, _paraHandle), PtsContext);
}
}
/// <summary>
/// ValidateVisual.
/// </summary>
internal void ValidateVisual()
{
ValidateVisual(PTS.FSKUPDATE.fskupdNew);
}
/// <summary>
/// FormatCellFinite - Calls same apis that PTS does for formatting
/// </summary>
/// <param name="subpageSize">Subpage size.</param>
/// <param name="breakRecordIn">Subpage break record.</param>
/// <param name="isEmptyOk">Is an empty cell ok?</param>
/// <param name="fswdir">Text Direction</param>
/// <param name="fsksuppresshardbreakbeforefirstparaIn">Suppress hard break before first para</param>
/// <param name="fsfmtr">Format result</param>
/// <param name="dvrUsed">dvr Used</param>
/// <param name="breakRecordOut">Resultant break record for end of page</param>
internal void FormatCellFinite(Size subpageSize, IntPtr breakRecordIn, bool isEmptyOk, uint fswdir,
PTS.FSKSUPPRESSHARDBREAKBEFOREFIRSTPARA fsksuppresshardbreakbeforefirstparaIn,
out PTS.FSFMTR fsfmtr, out int dvrUsed, out IntPtr breakRecordOut)
{
IntPtr pfspara;
PTS.FSBBOX fsbbox;
IntPtr pmcsclientOut;
PTS.FSKCLEAR fskclearOut;
int dvrTopSpace;
PTS.FSPAP fspap;
if(CellParagraph.StructuralCache.DtrList != null && breakRecordIn != IntPtr.Zero)
{
CellParagraph.InvalidateStructure(TextContainerHelper.GetCPFromElement(CellParagraph.StructuralCache.TextContainer, CellParagraph.Element, ElementEdge.BeforeStart));
}
// Ensures segment is created for paragraph
fspap = new PTS.FSPAP();
CellParagraph.GetParaProperties(ref fspap);
PTS.FSRECT rectCell;
rectCell = new PTS.FSRECT();
rectCell.u = rectCell.v = 0;
rectCell.du = TextDpi.ToTextDpi(subpageSize.Width);
rectCell.dv = TextDpi.ToTextDpi(subpageSize.Height);
// Suppress top space if cell is broken, but not otherwise
bool suppressTopSpace = (breakRecordIn != IntPtr.Zero) ? true : false;
CellParagraph.FormatParaFinite(this, breakRecordIn,
PTS.FromBoolean(true),
IntPtr.Zero,
PTS.FromBoolean(isEmptyOk),
PTS.FromBoolean(suppressTopSpace),
fswdir,
ref rectCell,
null,
PTS.FSKCLEAR.fskclearNone,
fsksuppresshardbreakbeforefirstparaIn,
out fsfmtr,
out pfspara,
out breakRecordOut,
out dvrUsed,
out fsbbox,
out pmcsclientOut,
out fskclearOut,
out dvrTopSpace);
if (pmcsclientOut != IntPtr.Zero)
{
MarginCollapsingState mcs = PtsContext.HandleToObject(pmcsclientOut) as MarginCollapsingState;
PTS.ValidateHandle(mcs);
dvrUsed += mcs.Margin;
mcs.Dispose();
pmcsclientOut = IntPtr.Zero;
}
_paraHandle = pfspara;
}
/// <summary>
/// FormatCellBottomless
/// </summary>
/// <param name="fswdir">Text Direction</param>
/// <param name="width">Width of cell (height is specified by row props)</param>
/// <param name="fmtrbl">bottomless format result</param>
/// <param name="dvrUsed">dvr Used</param>
internal void FormatCellBottomless(uint fswdir, double width, out PTS.FSFMTRBL fmtrbl, out int dvrUsed)
{
IntPtr pfspara;
PTS.FSBBOX fsbbox;
IntPtr pmcsclientOut;
PTS.FSKCLEAR fskclearOut;
int dvrTopSpace;
int fPageBecomesUninterruptable;
PTS.FSPAP fspap;
if(CellParagraph.StructuralCache.DtrList != null)
{
CellParagraph.InvalidateStructure(TextContainerHelper.GetCPFromElement(CellParagraph.StructuralCache.TextContainer, CellParagraph.Element, ElementEdge.BeforeStart));
}
fspap = new PTS.FSPAP();
CellParagraph.GetParaProperties(ref fspap);
CellParagraph.FormatParaBottomless(this, PTS.FromBoolean(false),
fswdir, 0, TextDpi.ToTextDpi(width),
0, null, PTS.FSKCLEAR.fskclearNone,
PTS.FromBoolean(true),
out fmtrbl,
out pfspara,
out dvrUsed,
out fsbbox,
out pmcsclientOut,
out fskclearOut,
out dvrTopSpace,
out fPageBecomesUninterruptable);
if (pmcsclientOut != IntPtr.Zero)
{
MarginCollapsingState mcs = PtsContext.HandleToObject(pmcsclientOut) as MarginCollapsingState;
PTS.ValidateHandle(mcs);
dvrUsed += mcs.Margin;
mcs.Dispose();
pmcsclientOut = IntPtr.Zero;
}
_paraHandle = pfspara;
}
/// <summary>
/// UpdateBottomlessCell
/// </summary>
/// <param name="fswdir">Text Direction</param>
/// <param name="width">Width of cell (height is specified by row props)</param>
/// <param name="fmtrbl">bottomless format result</param>
/// <param name="dvrUsed">dvr Used</param>
internal void UpdateBottomlessCell(uint fswdir, double width, out PTS.FSFMTRBL fmtrbl, out int dvrUsed)
{
IntPtr pmcsclientOut;
PTS.FSKCLEAR fskclearOut;
PTS.FSBBOX fsbbox;
int dvrTopSpace;
int fPageBecomesUninterruptable;
PTS.FSPAP fspap;
fspap = new PTS.FSPAP();
CellParagraph.GetParaProperties(ref fspap);
CellParagraph.UpdateBottomlessPara(_paraHandle, this,
PTS.FromBoolean(false),
fswdir, 0,
TextDpi.ToTextDpi(width),
0, null,
PTS.FSKCLEAR.fskclearNone,
PTS.FromBoolean(true),
out fmtrbl,
out dvrUsed,
out fsbbox,
out pmcsclientOut,
out fskclearOut,
out dvrTopSpace,
out fPageBecomesUninterruptable);
if (pmcsclientOut != IntPtr.Zero)
{
MarginCollapsingState mcs = PtsContext.HandleToObject(pmcsclientOut) as MarginCollapsingState;
PTS.ValidateHandle(mcs);
dvrUsed += mcs.Margin;
mcs.Dispose();
pmcsclientOut = IntPtr.Zero;
}
}
/// <summary>
///
/// </summary>
/// <param name="startPosition"></param>
/// <param name="endPosition"></param>
/// <param name="visibleRect"></param>
/// <returns></returns>
internal Geometry GetTightBoundingGeometryFromTextPositions(ITextPointer startPosition, ITextPointer endPosition, Rect visibleRect)
{
Geometry geometry = null;
// Find out if cell is selected. We consider cell selected if its end tag is crossed by selection.
// The asymmetry is important here - it allows to use only normalized positions
// and still be able to select individual cells.
// Note that this logic is an assumption in textselection unit expansion mechanism
// (TexSelection.ExtendSelectionToStructuralUnit method).
if (endPosition.CompareTo(Cell.StaticElementEnd) >= 0)
{
geometry = new RectangleGeometry(_rect.FromTextDpi());
}
else
{
SubpageParagraphResult paragraphResult = (SubpageParagraphResult)(CreateParagraphResult());
ReadOnlyCollection<ColumnResult> colResults = paragraphResult.Columns;
Transform transform;
transform = new TranslateTransform(-TextDpi.FromTextDpi(ContentRect.u), -TextDpi.FromTextDpi(ContentRect.v));
visibleRect = transform.TransformBounds(visibleRect);
transform = null;
geometry = TextDocumentView.GetTightBoundingGeometryFromTextPositionsHelper(colResults[0].Paragraphs, paragraphResult.FloatingElements, startPosition, endPosition, 0.0, visibleRect);
if (geometry != null)
{
// restrict geometry to the cell's content rect boundary.
// because of end-of-line / end-of-para simulation calculated geometry could be larger.
Rect viewport = new Rect(0, 0, TextDpi.FromTextDpi(ContentRect.du), TextDpi.FromTextDpi(ContentRect.dv));
CaretElement.ClipGeometryByViewport(ref geometry, viewport);
transform = new TranslateTransform(TextDpi.FromTextDpi(ContentRect.u), TextDpi.FromTextDpi(ContentRect.v));
CaretElement.AddTransformToGeometry(geometry, transform);
}
}
return (geometry);
}
/// <summary>
/// Calculates width of cell
/// </summary>
/// <param name="tableParaClient">Table owner</param>
/// <returns>Cell's width</returns>
internal double CalculateCellWidth(TableParaClient tableParaClient)
{
Debug.Assert(tableParaClient != null);
CalculatedColumn[] calculatedColumns = tableParaClient.CalculatedColumns;
Debug.Assert( calculatedColumns != null
&& (Cell.ColumnIndex + Cell.ColumnSpan) <= calculatedColumns.Length);
double durCellSpacing = Table.InternalCellSpacing;
double durCellWidth = -durCellSpacing;
// find the width sum of all columns the cell spans
int i = Cell.ColumnIndex + Cell.ColumnSpan - 1;
do
{
durCellWidth += calculatedColumns[i].DurWidth + durCellSpacing;
} while (--i >= Cell.ColumnIndex);
Debug.Assert(0 <= durCellWidth);
return durCellWidth;
}
#endregion Internal Methods
//------------------------------------------------------
//
// Internal Properties
//
//------------------------------------------------------
#region Internal Properties
/// <summary>
/// Cell.
/// </summary>
internal TableCell Cell { get { return (CellParagraph.Cell); } }
/// <summary>
/// Table.
/// </summary>
internal Table Table { get { return (Cell.Table); } }
/// <summary>
/// Cell paragraph.
/// </summary>
internal CellParagraph CellParagraph { get { return (CellParagraph)_paragraph; } }
/// <summary>
/// Returns column index.
/// </summary>
internal int ColumnIndex { get { return (Cell.ColumnIndex); } }
/// <summary>
/// Sets height for arrange.
/// </summary>
internal double ArrangeHeight { set { _arrangeHeight = value; } }
/// <summary>
/// Table para client
/// </summary>
internal TableParaClient TableParaClient { get { return (_tableParaClient); } }
#endregion Internal Properties
//------------------------------------------------------
//
// Private Fields
//
//------------------------------------------------------
#region Private Fields
private double _arrangeHeight; // height for arrange
private TableParaClient _tableParaClient;
#endregion Private Fields
}
internal class CellInfo
{
/// <summary>
/// C'tor - Just needs the table and cell para clients.
/// </summary>
/// <param name="tpc">Table para client.</param>
/// <param name="cpc">Cell Para client.</param>
internal CellInfo(TableParaClient tpc, CellParaClient cpc)
{
_rectTable = new Rect(TextDpi.FromTextDpi(tpc.Rect.u),
TextDpi.FromTextDpi(tpc.Rect.v),
TextDpi.FromTextDpi(tpc.Rect.du),
TextDpi.FromTextDpi(tpc.Rect.dv));
_rectCell = new Rect(TextDpi.FromTextDpi(cpc.Rect.u),
TextDpi.FromTextDpi(cpc.Rect.v),
TextDpi.FromTextDpi(cpc.Rect.du),
TextDpi.FromTextDpi(cpc.Rect.dv));
_autofitWidth = tpc.AutofitWidth;
_columnWidths = new double[tpc.CalculatedColumns.Length];
for(int index = 0; index < tpc.CalculatedColumns.Length; index++)
{
_columnWidths[index] = tpc.CalculatedColumns[index].DurWidth;
}
_cell = cpc.Cell;
}
/// <summary>
/// Adjusts cells rectangles by a given amount
/// </summary>
/// <param name="ptAdjust">Table para client.</param>
internal void Adjust(Point ptAdjust)
{
_rectTable.X += ptAdjust.X;
_rectTable.Y += ptAdjust.Y;
_rectCell.X += ptAdjust.X;
_rectCell.Y += ptAdjust.Y;
}
/// <summary>
/// Cell info is for
/// </summary>
internal TableCell Cell { get { return (_cell); } }
/// <summary>
/// Widths of columns in table
/// </summary>
internal double[] TableColumnWidths { get { return (_columnWidths); } }
/// <summary>
/// Autofit Width of table
/// </summary>
internal double TableAutofitWidth { get { return (_autofitWidth); } }
/// <summary>
/// Area for table
/// </summary>
internal Rect TableArea { get { return (_rectTable); } }
/// <summary>
/// Area for cell
/// </summary>
internal Rect CellArea { get { return (_rectCell); } }
private Rect _rectCell;
private Rect _rectTable;
private TableCell _cell;
private double[] _columnWidths;
private double _autofitWidth;
}
}
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