private void Set(ScreenBufferLinesRange range)
{
lines.Clear();
lines.AddRange(range.Lines);
beginPosition = range.BeginPosition;
endPosition = range.EndPosition;
if (Debugger.IsAttached)
{
VerifyInvariants();
}
}
private void Prepend(ScreenBufferLinesRange range)
{
diagnostics.VerifyPositionsOrderBeforeRangeConcatenation(
range.EndPosition, beginPosition, source.HasConsecutiveMessages);
lines.InsertRange(0, range.Lines);
beginPosition = range.BeginPosition;
if (Debugger.IsAttached)
{
VerifyInvariants();
}
}
public async Task LoadBefore(int nrOfLines, CancellationToken cancellation)
{
if (Count > 0)
{
var firstLine = Get(0);
var existingNrOfLines = Math.Min(nrOfLines, firstLine.LineIndex);
var range1 = new ScreenBufferLinesRange
{
Lines = Enumerable.Range(firstLine.LineIndex - existingNrOfLines, existingNrOfLines)
.Select(ln => new DisplayLine(firstLine.Message, ln, firstLine.TotalLinesInMessage, displayTextGetter, source)).ToList(),
BeginPosition = firstLine.Message.Position,
EndPosition = BeginPosition
};
Prepend(range1);
nrOfLines -= existingNrOfLines;
}
if (nrOfLines > 0)
{
var range2 = await GetScreenBufferLines(Source, BeginPosition, nrOfLines,
EnumMessagesFlag.Backward, displayTextGetter, diagnostics, cancellation);
Prepend(range2);
}
}
public async Task LoadAfter(int nrOfLines, CancellationToken cancellation)
{
if (Count > 0)
{
var lastLine = Get(Count - 1);
var existingNrOfLines = Math.Min(nrOfLines, lastLine.TotalLinesInMessage - lastLine.LineIndex - 1);
var range1 = new ScreenBufferLinesRange
{
Lines = Enumerable.Range(lastLine.LineIndex + 1, existingNrOfLines).Select(ln => new DisplayLine(
lastLine.Message, ln, lastLine.TotalLinesInMessage, displayTextGetter, source)).ToList(),
BeginPosition = EndPosition,
EndPosition = lastLine.Message.EndPosition
};
Append(range1);
nrOfLines -= existingNrOfLines;
}
if (nrOfLines > 0)
{
var range2 = await GetScreenBufferLines(Source, EndPosition, nrOfLines,
EnumMessagesFlag.Forward, displayTextGetter, diagnostics, cancellation);
Append(range2);
}
}