static async Task <ScreenBufferLinesRange> GetScreenBufferLines(
IMessagesSource src,
long startFrom,
int maxCount,
EnumMessagesFlag flags,
MessageTextGetter displayTextGetter,
Diagnostics diag,
CancellationToken cancellation,
bool doNotCountFirstMessage = false // todo: needed?
)
{
var backward = (flags & EnumMessagesFlag.Backward) != 0;
var lines = new List <DisplayLine>();
var loadedMessages = 0;
var linesToIgnore = 0;
await src.EnumMessages(startFrom, msg =>
{
var messagesLinesCount = displayTextGetter(msg).GetLinesCount();
if (backward)
{
for (int i = messagesLinesCount - 1; i >= 0; --i)
{
lines.Add(new DisplayLine(msg, i, messagesLinesCount, displayTextGetter, src));
}
}
else
{
for (int i = 0; i < messagesLinesCount; ++i)
{
lines.Add(new DisplayLine(msg, i, messagesLinesCount, displayTextGetter, src));
}
}
if (diag.IsEnabled)
{
diag.VerifyLines(backward ? Enumerable.Reverse(lines) : lines, src.HasConsecutiveMessages);
}
++loadedMessages;
if (doNotCountFirstMessage && loadedMessages == 1)
{
linesToIgnore = lines.Count;
}
return((lines.Count - linesToIgnore) < maxCount);
}, flags | EnumMessagesFlag.IsActiveLogPositionHint, LogProviderCommandPriority.RealtimeUserAction, cancellation);
cancellation.ThrowIfCancellationRequested();
var firstRead = lines.FirstOrDefault();
if (backward)
{
lines.Reverse();
}
var badPosition = backward ? src.PositionsRange.Begin : src.PositionsRange.End;
ScreenBufferLinesRange ret;
ret.Lines = lines;
ret.BeginPosition = lines.Count > 0 ? lines[0].Message.Position : badPosition;
ret.EndPosition = lines.Count > 0 ? lines[lines.Count - 1].Message.EndPosition : badPosition;
diag.VerifyLines(ret.Lines, src.HasConsecutiveMessages);
return(ret);
}
static async Task <ScreenBufferLinesRange> GetScreenBufferLines(
IMessagesSource src,
DateTime dt,
int maxCount,
MessageTextGetter displayTextGetter,
Diagnostics diag,
CancellationToken cancellation)
{
var startFrom = await src.GetDateBoundPosition(dt, ValueBound.Lower,
LogProviderCommandPriority.RealtimeUserAction, cancellation);
cancellation.ThrowIfCancellationRequested();
var lines = new List <DisplayLine>();
var additionalMessagesCount = 0;
await src.EnumMessages(
startFrom.Position,
msg =>
{
var messagesLinesCount = displayTextGetter(msg).GetLinesCount();
for (int i = 0; i < messagesLinesCount; ++i)
{
lines.Add(new DisplayLine(msg, i, messagesLinesCount, displayTextGetter, src));
}
var pastRequestedTime = msg.Time.ToLocalDateTime() > dt;
if (!pastRequestedTime)
{
return(true);
}
++additionalMessagesCount;
return(additionalMessagesCount < maxCount);
},
EnumMessagesFlag.Forward | EnumMessagesFlag.IsActiveLogPositionHint,
LogProviderCommandPriority.RealtimeUserAction,
cancellation
);
cancellation.ThrowIfCancellationRequested();
var srcPositionsRange = src.PositionsRange;
ScreenBufferLinesRange ret;
ret.Lines = lines;
ret.BeginPosition = lines.Count > 0 ? lines[0].Message.Position : srcPositionsRange.End;
if (lines.Count > 0)
{
ret.EndPosition = lines[lines.Count - 1].Message.EndPosition;
}
else
{
ret.EndPosition = srcPositionsRange.End;
}
diag.VerifyLines(ret.Lines, src.HasConsecutiveMessages);
return(ret);
}
static async Task <ScreenBufferMessagesRange> GetScreenBufferLines(
IMessagesSource src,
long startFrom,
int maxCount,
EnumMessagesFlag flags,
bool rawLogMode,
CancellationToken cancellation,
bool doNotCountFirstMessage = false
)
{
var backward = (flags & EnumMessagesFlag.Backward) != 0;
var lines = new List <DisplayLine>();
var loadedMessages = 0;
var linesToIgnore = 0;
await src.EnumMessages(startFrom, msg =>
{
var messagesLinesCount = msg.GetDisplayText(rawLogMode).GetLinesCount();
if (backward)
{
for (int i = messagesLinesCount - 1; i >= 0; --i)
{
lines.Add(new DisplayLine(msg, i, messagesLinesCount));
}
}
else
{
for (int i = 0; i < messagesLinesCount; ++i)
{
lines.Add(new DisplayLine(msg, i, messagesLinesCount));
}
}
++loadedMessages;
if (doNotCountFirstMessage && loadedMessages == 1)
{
linesToIgnore = lines.Count;
}
return((lines.Count - linesToIgnore) < maxCount);
}, flags | EnumMessagesFlag.IsActiveLogPositionHint, LogProviderCommandPriority.RealtimeUserAction, cancellation);
cancellation.ThrowIfCancellationRequested();
var firstRead = lines.FirstOrDefault();
if (backward)
{
lines.Reverse();
}
var badPosition = backward ? src.PositionsRange.Begin : src.PositionsRange.End;
ScreenBufferMessagesRange ret;
ret.Lines = lines;
ret.BeginPosition = lines.Count > 0 ? lines[0].Message.Position : badPosition;
if (lines.Count == 0)
{
ret.EndPosition = badPosition;
}
else
{
ret.EndPosition = lines[lines.Count - 1].Message.EndPosition;
}
return(ret);
}