public override int LengthForNewRun(IDataModel model, int pointerAddress)
{
var tableRun = GetTable(model, pointerAddress);
var pointerSegment = GetSegment(tableRun, pointerAddress);
TableStreamRun.TryParseTableStream(model, -1, new SortedSpan <int>(pointerAddress), pointerSegment.Name, pointerSegment.InnerFormat, tableRun.ElementContent, out var newStream);
return(newStream.Length);
}
public override void UpdateNewRunFromPointerFormat(IDataModel model, ModelDelta token, string name, ref IFormattedRun run)
{
if (!TableStreamRun.TryParseTableStream(model, run.Start, run.PointerSources, name, Format, null, out var runAttempt))
{
return;
}
model.ClearFormat(token, run.Start, runAttempt.Length);
run = runAttempt;
}
public override void UpdateNewRunFromPointerFormat(IDataModel model, ModelDelta token, string name, IReadOnlyList <ArrayRunElementSegment> sourceSegments, int parentIndex, ref IFormattedRun run)
{
if (!TableStreamRun.TryParseTableStream(model, run.Start, run.PointerSources, name, Format, null, out var runAttempt))
{
return;
}
model.ClearFormat(token, run.Start, runAttempt.Length);
run = runAttempt;
}
public override IFormattedRun WriteNewRun(IDataModel owner, ModelDelta token, int source, int destination, string name, IReadOnlyList <ArrayRunElementSegment> sourceSegments)
{
// don't bother checking the TryParse result: we very much expect that the data originally in the run won't fit the parse.
TableStreamRun.TryParseTableStream(owner, destination, new SortedSpan <int>(source), name, Format, sourceSegments, out var tableStream);
if (TableStreamRun.TryWriteNewEndToken(token, ref tableStream))
{
return(tableStream);
}
return(tableStream.DeserializeRun("", token));
}
public override bool TryAddFormatAtDestination(IDataModel owner, ModelDelta token, int source, int destination, string name, IReadOnlyList <ArrayRunElementSegment> sourceSegments)
{
if (TableStreamRun.TryParseTableStream(owner, destination, new SortedSpan <int>(source), name, Format, sourceSegments, out var tsRun))
{
if (!(token is NoDataChangeDeltaModel))
{
owner.ObserveRunWritten(token, tsRun);
}
return(true);
}
return(false);
}
public override bool TryAddFormatAtDestination(IDataModel owner, ModelDelta token, int source, int destination, string name, IReadOnlyList <ArrayRunElementSegment> sourceSegments, int parentIndex)
{
if (TableStreamRun.TryParseTableStream(owner, destination, new SortedSpan <int>(source), name, Format, sourceSegments, out var tsRun))
{
if (token is not NoDataChangeDeltaModel)
{
// we know that the data format matches, but there may already be a run there that starts sooner
if (owner.GetNextRun(tsRun.Start) is ITableRun existingTable && existingTable.Start < tsRun.Start)
{
// there is already a format that starts sooner: do nothing, but return true because the format matches
}
else
{
owner.ClearFormat(token, tsRun.Start + 1, tsRun.Length - 1);
owner.ObserveRunWritten(token, tsRun);
}
}
return(true);
}
