public void GetSemanticTokens_Razor_SomeTagHelpers_ThenNone()
{
var txt = $"@addTagHelper *, TestAssembly{Environment.NewLine}<test1></test1>";
var expectedData = new int[] {
1, 1, 5, 0, 0,
0, 8, 5, 0, 0,
};
var previousResultId = AssertSemanticTokens(txt, expectedData, isRazor: false, out var service);
var newTxt = $"addTagHelper *, TestAssembly{Environment.NewLine}<p></p>";
var newExpectedData = new SemanticTokensDelta
{
Edits = new List <SemanticTokensEdit>
{
new SemanticTokensEdit
{
Start = 0,
Data = Array.Empty <int>().ToImmutableArray(),
DeleteCount = 10,
}
}
};
var newResultId = AssertSemanticTokenEdits(newTxt, newExpectedData, isRazor: false, previousResultId: previousResultId, out var _, service);
Assert.NotEqual(previousResultId, newResultId);
}
public void GetSemanticTokens_Razor_OnlyDifferences_NewLines()
{
var txt = $"@addTagHelper *, TestAssembly{Environment.NewLine}<test1></test1>";
var expectedData = new List <int> {
1, 1, 5, 0, 0, //line, character pos, length, tokenType, modifier
0, 8, 5, 0, 0
};
var previousResultId = AssertSemanticTokens(txt, expectedData, isRazor: false, out var service);
var newTxt = $"@addTagHelper *, TestAssembly{Environment.NewLine}<test1></test1>{Environment.NewLine}" +
$"<test1></test1>";
var newExpectedData = new SemanticTokensDelta
{
Edits = new List <SemanticTokensEdit> {
new SemanticTokensEdit
{
Start = 10,
Data = new int[] {
1, 1, 5, 0, 0,
0, 8, 5, 0, 0,
}.ToImmutableArray(),
DeleteCount = 0,
}
}
};
var newResultId = AssertSemanticTokenEdits(newTxt, newExpectedData, isRazor: false, previousResultId: previousResultId, out _, service);
Assert.NotEqual(previousResultId, newResultId);
}
public async Task <SumType <LSP.SemanticTokens, LSP.SemanticTokensDelta> > HandleRequestAsync(
LSP.SemanticTokensDeltaParams request,
RequestContext context,
CancellationToken cancellationToken)
{
Contract.ThrowIfNull(request.TextDocument, "TextDocument is null.");
Contract.ThrowIfNull(request.PreviousResultId, "previousResultId is null.");
Contract.ThrowIfNull(context.Document, "Document is null.");
// Even though we want to ultimately pass edits back to LSP, we still need to compute all semantic tokens,
// both for caching purposes and in order to have a baseline comparison when computing the edits.
var newSemanticTokensData = await SemanticTokensHelpers.ComputeSemanticTokensDataAsync(
context.Document, SemanticTokensCache.TokenTypeToIndex,
range : null, cancellationToken).ConfigureAwait(false);
Contract.ThrowIfNull(newSemanticTokensData, "newSemanticTokensData is null.");
// Getting the cached tokens for the document. If we don't have an applicable cached token set,
// we can't calculate edits, so we must return all semantic tokens instead.
var oldSemanticTokensData = await _tokensCache.GetCachedTokensDataAsync(
request.TextDocument.Uri, request.PreviousResultId, cancellationToken).ConfigureAwait(false);
if (oldSemanticTokensData == null)
{
var newResultId = _tokensCache.GetNextResultId();
return(new LSP.SemanticTokens {
ResultId = newResultId, Data = newSemanticTokensData
});
}
var resultId = request.PreviousResultId;
var editArray = ComputeSemanticTokensEdits(oldSemanticTokensData, newSemanticTokensData);
// If we have edits, generate a new ResultId. Otherwise, re-use the previous one.
if (editArray.Length != 0)
{
resultId = _tokensCache.GetNextResultId();
var updatedTokens = new LSP.SemanticTokens {
ResultId = resultId, Data = newSemanticTokensData
};
await _tokensCache.UpdateCacheAsync(
request.TextDocument.Uri, updatedTokens, cancellationToken).ConfigureAwait(false);
}
var edits = new SemanticTokensDelta
{
Edits = editArray,
ResultId = resultId
};
return(edits);
}
public static SemanticTokensFullOrDelta ComputeSemanticTokensEdits(
SemanticTokensResponse newTokens,
IReadOnlyList <int> previousResults)
{
var differ = new SemanticTokensEditsDiffer(previousResults, newTokens.Data);
var diffs = differ.ComputeDiff();
var edits = differ.ProcessEdits(diffs);
var result = new SemanticTokensDelta
{
ResultId = newTokens.ResultId,
Edits = edits,
};
return(result);
}
public void GetSemanticTokens_Razor_CoalesceDeleteAndAdd()
{
var txt = $"@addTagHelper *, TestAssembly{Environment.NewLine}<test1 />";
var expectedData = new List <int>
{
1, 1, 5, 0, 0, //line, character pos, length, tokenType, modifier
};
var previousResultId = AssertSemanticTokens(txt, expectedData, isRazor: false, out var service);
var newTxt = $"@addTagHelper *, TestAssembly{Environment.NewLine}{Environment.NewLine} <p @minimized></p>";
var newExpectedData = new SemanticTokensDelta
{
Edits = new SemanticTokensEdit[] {
new SemanticTokensEdit
{
Start = 0,
DeleteCount = 0,
Data = new List <int> {
2, 5,
}.ToImmutableArray(),
},
new SemanticTokensEdit
{
Start = 1,
DeleteCount = 0,
Data = new List <int>
{
2, 0, 0,
}.ToImmutableArray(),
},
new SemanticTokensEdit
{
Start = 2,
DeleteCount = 2,
Data = new List <int>
{
9, 4,
}.ToImmutableArray()
}
}
};
var newResultId = AssertSemanticTokenEdits(newTxt, newExpectedData, isRazor: true, previousResultId: previousResultId, out var _, service);
Assert.NotEqual(previousResultId, newResultId);
}
public void GetSemanticTokens_Razor_Modify()
{
var txt = $"@addTagHelper *, TestAssembly{Environment.NewLine}" +
$"<test1 bool-val=\"true\" />{Environment.NewLine}" +
$"<test1 bool-val=\"true\" />{Environment.NewLine}" +
$"<test1 bool-val=\"true\" />{Environment.NewLine}";
var expectedData = new List <int> {
1, 1, 5, 0, 0, //line, character pos, length, tokenType, modifier
0, 6, 8, 1, 0,
1, 1, 5, 0, 0,
0, 6, 8, 1, 0,
1, 1, 5, 0, 0,
0, 6, 8, 1, 0,
};
var previousResultId = AssertSemanticTokens(txt, expectedData, isRazor: false, out var service);
var newTxt = $"@addTagHelper *, TestAssembly{Environment.NewLine}" +
$"<test1 bool-va=\"true\" />{Environment.NewLine}" +
$"<test1 bool-val=\"true\" />{Environment.NewLine}" +
$"<test1 bool-val=\"true\" />{Environment.NewLine}";
var newExpectedData = new SemanticTokensDelta
{
Edits = new List <SemanticTokensEdit>
{
new SemanticTokensEdit
{
Start = 5,
Data = Array.Empty <int>().ToImmutableArray(),
DeleteCount = 5,
},
}
};
var newResultId = AssertSemanticTokenEdits(newTxt, newExpectedData, isRazor: false, previousResultId: previousResultId, out _, service);
Assert.NotEqual(previousResultId, newResultId);
}
public SemanticTokensFullOrDelta GetSemanticTokensEdits()
{
if (!_prevData.HasValue)
{
return(GetSemanticTokens());
}
var prevData = _prevData.Value;
var prevDataLength = prevData.Length;
var dataLength = Data.Length;
var startIndex = 0;
while (startIndex < dataLength && startIndex < prevDataLength && prevData[startIndex] ==
Data[startIndex])
{
startIndex++;
}
if (startIndex < dataLength && startIndex < prevDataLength)
{
// Find end index
var endIndex = 0;
while (endIndex < dataLength && endIndex < prevDataLength &&
prevData[prevDataLength - 1 - endIndex] == Data[dataLength - 1 - endIndex])
{
endIndex++;
}
var newData = ImmutableArray.Create(Data, startIndex, dataLength - endIndex - startIndex);
var result = new SemanticTokensDelta {
ResultId = Id,
Edits = new[] {
new SemanticTokensEdit {
Start = startIndex,
DeleteCount = prevDataLength - endIndex - startIndex,
Data = newData
}
}
};
return(result);
}
if (startIndex < dataLength)
{
return(new SemanticTokensDelta {
ResultId = Id, Edits = new[] {
new SemanticTokensEdit {
Start = startIndex,
DeleteCount = 0,
Data = ImmutableArray.Create(Data, startIndex, DataLen - startIndex)
}
}
});
}
if (startIndex < prevDataLength)
{
return(new SemanticTokensDelta {
ResultId = Id,
Edits = new[] {
new SemanticTokensEdit {
Start = startIndex,
DeleteCount = prevDataLength - startIndex
}
}
});
}
return(new SemanticTokensDelta {
ResultId = Id, Edits = Array.Empty <SemanticTokensEdit>()
});
}