public async Task CanLoadExactMessageInMiddleOfLog1()
{
Assert.IsTrue(await screenBuffer.MoveToBookmark(bmks.CreateBookmark(src1.messages.Items[2], 2), BookmarkLookupMode.ExactMatch, cancel));
VerifyMessages(screenBuffer,
@"a2-ln_2
b2-ln_0
b2-ln_1
a3-ln_0
a3-ln_1", 0);
}
public async Task CanLoadAtMiddle()
{
await screenBuffer.MoveToBookmark(bmks.CreateBookmark(src.messages.Items[0], 2), BookmarkLookupMode.ExactMatch, cancel);
VerifyMessages(screenBuffer,
@"0-ln_2
0-ln_3
0-ln_4
0-ln_5
1-ln_0
1-ln_1
1-ln_2", 0);
}
public async Task CanLoadBookmark()
{
await screenBuffer.MoveToBookmark(bmks.CreateBookmark(src.messages.Items[9], 0), BookmarkLookupMode.ExactMatch, cancel);
VerifyMessages(screenBuffer,
@"9-ln_0
10-ln_0
11-ln_0
12-ln_0
13-ln_0
14-ln_0", 0);
}
public async Task CanLoadBookmarkWhenManyMessagesShareTheTimestamp()
{
src1 = CreateTestSource(messagesCount: 20, linesPerMessage: 1, messagesPrefix: "a", messagesPerTimestamp: 10);
src2 = CreateTestSource(messagesCount: 20, linesPerMessage: 1, messagesPrefix: "b", messagesPerTimestamp: 10);
screenBuffer = new ScreenBuffer(changeNotification, 3);
await screenBuffer.SetSources(new[] { src1, src2 }, cancel);
await screenBuffer.MoveToBookmark(
bmks.CreateBookmark(src1.messages.Items[5], 0), BookmarkLookupMode.ExactMatch, cancel);
VerifyMessages(screenBuffer,
@"a5-ln_0
a6-ln_0
a7-ln_0", 0);
await screenBuffer.MoveToBookmark(
bmks.CreateBookmark(src2.messages.Items[0], 0), BookmarkLookupMode.ExactMatch | BookmarkLookupMode.MoveBookmarkToMiddleOfScreen, cancel);
VerifyMessages(screenBuffer,
@"a9-ln_0
b0-ln_0
b1-ln_0", 0);
}
public async Task ShouldLoadNothingIsViewSizeIsZero()
{
src = CreateTestSource(messagesCount: 20);
screenBuffer = new ScreenBuffer(changeNotification, 0);
await screenBuffer.SetSources(new[] { src }, cancel);
await screenBuffer.MoveToBookmark(
bmks.CreateBookmark(src.messages.Items[5], 0), BookmarkLookupMode.ExactMatch, cancel);
Assert.AreEqual(0, screenBuffer.Messages.Count);
await screenBuffer.MoveToStreamsEnd(cancel);
Assert.AreEqual(0, screenBuffer.Messages.Count);
}
public async Task CanLoadExactMessageWhenViewIsLargerThanLogg_WithScrollingToTopMiddleOfScreen()
{
src = CreateTestSource(messagesCount: 2, linesPerMessage: 3);
screenBuffer = new ScreenBuffer(changeNotification, 8.2);
await screenBuffer.SetSources(new[] { src }, cancel);
Assert.IsTrue(await screenBuffer.MoveToBookmark(bmks.CreateBookmark(src.messages.Items[1], 2), BookmarkLookupMode.ExactMatch | BookmarkLookupMode.MoveBookmarkToMiddleOfScreen, cancel));
VerifyMessages(screenBuffer,
@"0-ln_0
0-ln_1
0-ln_2
1-ln_0
1-ln_1
1-ln_2", 0);
}
async Task <List <ScreenBufferEntry> > GetSelectedDisplayMessagesEntries()
{
var viewLines = screenBuffer.Messages;
Func <CursorPosition, bool> isGoodDisplayPosition = p =>
{
if (p.Message == null)
{
return(true);
}
return(p.DisplayIndex >= 0 && p.DisplayIndex < viewLines.Count);
};
var normSelection = selection.Normalize();
if (normSelection.IsEmpty)
{
return(new List <ScreenBufferEntry>());
}
Func <List <ScreenBufferEntry> > defaultGet = () =>
{
int selectedLinesCount = normSelection.Last.DisplayIndex - normSelection.First.DisplayIndex + 1;
return(viewLines.Skip(normSelection.First.DisplayIndex).Take(selectedLinesCount).ToList());
};
if (isGoodDisplayPosition(normSelection.First) && isGoodDisplayPosition(normSelection.Last))
{
// most common case: both positions are in the screen buffer at the moment
return(defaultGet());
}
CancellationToken cancellation = CancellationToken.None;
IScreenBuffer tmpBuf = screenBufferFactory.CreateScreenBuffer(initialBufferPosition: InitialBufferPosition.Nowhere);
await tmpBuf.SetSources(screenBuffer.Sources.Select(s => s.Source), cancellation);
if (!await tmpBuf.MoveToBookmark(bookmarksFactory.CreateBookmark(normSelection.First.Message, 0),
BookmarkLookupMode.ExactMatch, cancellation))
{
// Impossible to load selected message into screen buffer. Rather impossible.
return(defaultGet());
}
var tasks = screenBuffer.Sources.Select(async sourceBuf =>
{
var sourceMessages = new List <IMessage>();
await sourceBuf.Source.EnumMessages(
tmpBuf.Sources.First(sb => sb.Source == sourceBuf.Source).Begin,
m =>
{
if (MessagesComparer.Compare(m, normSelection.Last.Message) > 0)
{
return(false);
}
sourceMessages.Add(m);
return(true);
},
EnumMessagesFlag.Forward,
LogProviderCommandPriority.AsyncUserAction,
cancellation
);
return(new { Source = sourceBuf.Source, Messages = sourceMessages });
}).ToList();
await Task.WhenAll(tasks);
cancellation.ThrowIfCancellationRequested();
var messagesToSource = tasks.ToDictionary(
t => (IMessagesCollection) new MessagesContainers.SimpleCollection(t.Result.Messages), t => t.Result.Source);
return
(new MessagesContainers.SimpleMergingCollection(messagesToSource.Keys)
.Forward(0, int.MaxValue)
.SelectMany(m =>
Enumerable.Range(0, GetTextToDisplay(m.Message.Message).GetLinesCount()).Select(
lineIdx => new ScreenBufferEntry()
{
TextLineIndex = lineIdx,
Message = m.Message.Message,
Source = messagesToSource[m.SourceCollection],
}
)
)
.TakeWhile(m => CursorPosition.Compare(CursorPosition.FromViewLine(m.ToViewLine(), 0), normSelection.Last) <= 0)
.ToList());
}
