public static unsafe CustomTextSource4 InnerUpdateAsync(MainUpdateParameters mainUpdateParameters,
Func <CustomTextSource4> makeSource)
{
LinkedListNode <CharInfo> charInfoNode = null;
const int batchLines = 100;
var lineInfos0 = new LineInfo2[batchLines];
var lineInfos1 = new LineInfo2[batchLines];
var lineInfos = lineInfos0;
int @switch = 0;
mainUpdateParameters.DebugFn?.Invoke($"{nameof(InnerUpdateAsync)}", 5);
var tf = CreateTypeface(new FontFamily(mainUpdateParameters.FaceName), FontStyles.Normal,
FontStretches.Normal,
mainUpdateParameters.FontWeight);
var currentRendering = FontRendering.CreateInstance(mainUpdateParameters.FontSize,
TextAlignment.Left,
null,
Brushes.Black,
tf);
var customTextSource4 = makeSource();
var myGroup = new DrawingGroup();
var myDc = myGroup.Open();
var genericTextParagraphProperties =
new GenericTextParagraphProperties(currentRendering, mainUpdateParameters.PixelsPerDip);
var runsInfos = new List <TextRunInfo>();
var allCharInfos = new LinkedList <CharInfo>();
var textStorePosition = mainUpdateParameters.TextStorePosition;
var lineNo = mainUpdateParameters.LineNo;
// var tasks = new List<Task>();
var linePosition = mainUpdateParameters.LinePosition;
var liIndex = 0;
while (textStorePosition < customTextSource4.Length)
{
var runCount = customTextSource4.Runs.Count;
#if DEBUGTEXTSOURCE
Debug.WriteLine("Runcount = " + runCount);
#endif
var numPages = 0;
var pageBegin = new Point(0, 0);
var pageEnd = new Point(0, 0);
if (mainUpdateParameters.Paginate)
{
// ReSharper disable once PossibleInvalidOperationException
pageEnd.Offset(mainUpdateParameters.PageSize.Value.Width,
mainUpdateParameters.PageSize.Value.Height);
}
LineInfo2 lineInfo;
var linePositionX = mainUpdateParameters.ParagraphWidth - linePosition.X;
if (linePositionX < 0)
{
linePositionX = 0;
}
using (var myTextLine = mainUpdateParameters.TextFormatter.FormatLine(customTextSource4,
textStorePosition, linePositionX,
genericTextParagraphProperties,
null))
{
var nRuns = customTextSource4.Runs.Count - runCount;
if (nRuns < 0)
{
throw new InvalidOperationException("NRuns is negative" + nRuns);
}
#if DEBUGTEXTSOURCE
Debug.WriteLine("num runs for line is " + nRuns);
#endif
var curCharInfoNode = charInfoNode;
HandleLine(allCharInfos, linePosition, myTextLine, customTextSource4, runCount,
nRuns, lineNo, textStorePosition, runsInfos, curCharInfoNode, out charInfoNode,
mainUpdateParameters.DebugFn);
myTextLine.Draw(myDc, linePosition, InvertAxes.None);
lineInfos[liIndex++] = new LineInfo2(lineNo, curCharInfoNode != null? curCharInfoNode.Next : allCharInfos.First, textStorePosition, linePosition, myTextLine.Height,
myTextLine.Length);
linePosition.Y += myTextLine.Height;
lineNo++;
// Update the index position in the text store.
textStorePosition += myTextLine.Length;
if (mainUpdateParameters.Paginate && linePosition.Y >= pageEnd.Y)
{
Debug.WriteLine($"numPages: {numPages}");
numPages++;
}
}
#if GROUPEDDG
if (lineNo > 0 && lineNo % batchLines == 0)
{
myDc.Close();
myGroup.Freeze();
var curUi = new UpdateInfo()
{
DrawingGroup = myGroup, CharInfos = allCharInfos.ToList <CharInfo>()
};
await mainUpdateParameters.ChannelWriter.WriteAsync(curUi);
// tasks.Add(writeAsync.AsTask());
myGroup = new DrawingGroup();
myDc = myGroup.Open();
}
#else
if (lineNo <= 0 || lineNo % batchLines != 0)
{
continue;
}
myDc.Close();
myGroup.Freeze();
var curUi = new UpdateInfo(
myGroup,
liIndex,
lineInfos
);
liIndex = 0;
if (@switch == 0)
{
lineInfos = lineInfos1;
@switch = 1;
}
else
{
lineInfos = lineInfos0;
@switch = 0;
}
mainUpdateParameters.ChannelWriter.WriteAsync(curUi);
myGroup = new DrawingGroup();
myDc = myGroup.Open();
#endif
}
customTextSource4.RunInfos = runsInfos;
#if GROUPEDDG
if (lineNo % 100 != 0)
{
myDc.Close();
myGroup.Freeze();
var curUi = new UpdateInfo()
{
DrawingGroup = myGroup, CharInfos = Enumerable.ToList <CharInfo>(allCharInfos), FinalBlock = true
};
await mainUpdateParameters.ChannelWriter.WriteAsync(curUi);
// tasks.Add(writeAsync.AsTask());
}
else
{
myDc.Close();
}
#else
if (lineNo % batchLines == 0)
{
return(customTextSource4);
}
{
myDc.Close();
myGroup.Freeze();
var curUi = new UpdateInfo(
myGroup,
liIndex,
lineInfos
);
mainUpdateParameters.ChannelWriter.WriteAsync(curUi);
}
#endif
// await Task.WhenAll(tasks);
return(customTextSource4);
}
public RedrawLineResult(LineInfo2 lineInfo, DrawingGroup drawingGroup, in double lineMaxX, in double lineMaxY,