Task IScreenBuffer.SetDisplayTextGetter(MessageTextGetter displayTextGetter, CancellationToken cancellation)
{
if (this.displayTextGetter == displayTextGetter)
{
return(Task.FromResult(0));
}
this.displayTextGetter = displayTextGetter;
changeNotification.Post();
var currentTop = EnumScreenBufferLines().FirstOrDefault();
return(PerformBuffersTransaction(
string.Format("SetDisplayTextGetter({0})", displayTextGetter),
cancellation,
modifyBuffers: tmp => Task.WhenAll(tmp.Select(b => b.LoadAround(GetMaxBufferSize(viewSize), cancellation))),
getPivotLine: (lines, bufs) =>
{
var candidate = new DisplayLine();
if (!currentTop.IsEmpty)
{
candidate = lines.FirstOrDefault(l => MessagesComparer.Compare(l.Message, currentTop.Message) == 0 && l.LineIndex == currentTop.LineIndex);
if (candidate.IsEmpty)
{
candidate = lines.FirstOrDefault(l => MessagesComparer.Compare(l.Message, currentTop.Message) == 0);
}
}
if (candidate.IsEmpty)
{
candidate = lines.FirstOrDefault();
}
if (candidate.IsEmpty)
{
return null;
}
return Tuple.Create(candidate, -scrolledLines);
}
));
}
async Task <bool> IScreenBuffer.MoveToBookmark(
IBookmark bookmark,
BookmarkLookupMode mode,
CancellationToken cancellation)
{
var matchMode = mode & BookmarkLookupMode.MatchModeMask;
Func <DisplayLine, int> cmp = (DisplayLine l) =>
{
var ret = MessagesComparer.CompareLogSourceConnectionIds(l.Message.GetConnectionId(), bookmark.LogSourceConnectionId);
if (ret == 0)
{
ret = Math.Sign(l.Message.Position - bookmark.Position);
}
if (ret == 0)
{
ret = Math.Sign(l.LineIndex - bookmark.LineIndex);
}
return(ret);
};
return(await PerformBuffersTransaction(
string.Format("MoveToBookmark({0})", mode),
cancellation,
modifyBuffers : tmp => Task.WhenAll(tmp.Select(buf =>
matchMode == BookmarkLookupMode.ExactMatch && buf.Source.LogSourceHint?.ConnectionId == bookmark.LogSourceConnectionId ?
buf.LoadAround(bookmark.Position, GetMaxBufferSize(viewSize) + bookmark.LineIndex, cancellation) :
buf.LoadAt(bookmark.Time.ToLocalDateTime(), GetMaxBufferSize(viewSize) + bookmark.LineIndex, cancellation)
)),
getPivotLine : (lines, bufs) =>
{
DisplayLine ret = new DisplayLine();
if (matchMode == BookmarkLookupMode.ExactMatch)
{
ret = lines.FirstOrDefault(l => cmp(l) == 0);
}
else if (matchMode == BookmarkLookupMode.FindNearestMessage)
{
ret = lines.FirstOrDefault(l => cmp(l) >= 0);
if (ret.IsEmpty)
{
ret = lines.LastOrDefault(l => cmp(l) < 0);
}
}
return ret.Message == null ? null : Tuple.Create(ret, ComputeMatchedLinePosition(mode));
}
) != null);
}
