static IEnumerable <LineScrollInfo> GetBufferZippedWithScrollPositions(IEnumerable <SourceBuffer> bufs, IEnumerable <DisplayLine> lines)
{
var currentIndices = bufs.ToDictionary(b => b.Source, b => new Ref <int>());
Func <LineScrollInfo> calcScrollPosHelper = () =>
{
var ret = new LineScrollInfo();
foreach (var buf in bufs)
{
int currentIndex = currentIndices[buf.Source].Value;
if (currentIndex < buf.Count)
{
var dl = buf.Get(currentIndex);
var msgBeginPos = buf.Source.MapPositionToScrollPosition(dl.Message.Position);
ret.ScrollPositionBegin += msgBeginPos + dl.LineOffsetBegin;
ret.ScrollPositionEnd += msgBeginPos + dl.LineOffsetEnd;
}
else
{
var bufEnd = buf.Source.MapPositionToScrollPosition(buf.EndPosition);
ret.ScrollPositionBegin += bufEnd;
ret.ScrollPositionEnd += bufEnd;
}
}
return(ret);
};
foreach (var m in lines)
{
var source = m.Source;
var lineInfo = calcScrollPosHelper();
lineInfo.Index = m.Index;
yield return(lineInfo);
currentIndices[source].Value++;
}
}
private LineScrollInfo CalcScrollPosHelper()
{
var ret = new LineScrollInfo();
foreach (var buf in buffers.Values)
{
if (buf.CurrentIndex < buf.Count)
{
var dl = buf.Get(buf.CurrentIndex);
var msgBeginPos = buf.Source.MapPositionToScrollPosition(dl.Message.Position);
ret.ScrollPositionBegin += msgBeginPos + dl.LineOffsetBegin;
ret.ScrollPositionEnd += msgBeginPos + dl.LineOffsetEnd;
}
else
{
var bufEnd = buf.Source.MapPositionToScrollPosition(buf.EndPosition);
ret.ScrollPositionBegin += bufEnd;
ret.ScrollPositionEnd += bufEnd;
}
}
return(ret);
}