public static HighlightSpan CreateHighlightSpan(ClassifiedSpan span, TextLineCollection lines, IEnumerable <string> projects)
{
var linePos = lines.GetLinePositionSpan(span.TextSpan);
return(new HighlightSpan
{
StartLine = linePos.Start.Line,
EndLine = linePos.End.Line,
StartColumn = linePos.Start.Character,
EndColumn = linePos.End.Character,
Kind = span.ClassificationType,
Projects = projects
});
}
private static SemanticHighlightSpan CreateSemanticSpan(IEnumerable <ClassifiedResult> results, TextLineCollection lines)
{
var additiveResults = results.Where(result => ClassificationTypeNames.AdditiveTypeNames.Contains(result.Span.ClassificationType));
var modifiers = additiveResults.Select(result => _modifierMap[result.Span.ClassificationType]).ToArray();
var result = results.Except(additiveResults).Single();
var span = result.Span;
var linePos = lines.GetLinePositionSpan(span.TextSpan);
return(new SemanticHighlightSpan
{
StartLine = linePos.Start.Line,
EndLine = linePos.End.Line,
StartColumn = linePos.Start.Character,
EndColumn = linePos.End.Character,
Type = _classificationMap[span.ClassificationType],
Modifiers = modifiers
});
}
public static int GetLineCount(this TextLineCollection textLines, TextSpan span)
{
return(textLines.GetLinePositionSpan(span).GetLineCount());
}
private static int ComputeNextToken(
TextLineCollection lines,
ref int lastLineNumber,
ref int lastStartCharacter,
ClassifiedSpan[] classifiedSpans,
int currentClassifiedSpanIndex,
Dictionary <string, int> tokenTypesToIndex,
out int deltaLineOut,
out int startCharacterDeltaOut,
out int tokenLengthOut,
out int tokenTypeOut,
out int tokenModifiersOut)
{
// Each semantic token is represented in LSP by five numbers:
// 1. Token line number delta, relative to the previous token
// 2. Token start character delta, relative to the previous token
// 3. Token length
// 4. Token type (index) - looked up in SemanticTokensLegend.tokenTypes
// 5. Token modifiers - each set bit will be looked up in SemanticTokensLegend.tokenModifiers
var classifiedSpan = classifiedSpans[currentClassifiedSpanIndex];
var originalTextSpan = classifiedSpan.TextSpan;
var linePosition = lines.GetLinePositionSpan(originalTextSpan).Start;
var lineNumber = linePosition.Line;
// 1. Token line number delta, relative to the previous token
var deltaLine = lineNumber - lastLineNumber;
Contract.ThrowIfTrue(deltaLine < 0, $"deltaLine is less than 0: {deltaLine}");
// 2. Token start character delta, relative to the previous token
// (Relative to 0 or the previous token’s start if they're on the same line)
var deltaStartCharacter = linePosition.Character;
if (lastLineNumber == lineNumber)
{
deltaStartCharacter -= lastStartCharacter;
}
lastLineNumber = lineNumber;
lastStartCharacter = linePosition.Character;
// 3. Token length
var tokenLength = originalTextSpan.Length;
// We currently only have one modifier (static). The logic below will need to change in the future if other
// modifiers are added in the future.
var modifierBits = TokenModifiers.None;
var tokenTypeIndex = 0;
// Classified spans with the same text span should be combined into one token.
while (classifiedSpans[currentClassifiedSpanIndex].TextSpan == originalTextSpan)
{
var classificationType = classifiedSpans[currentClassifiedSpanIndex].ClassificationType;
if (classificationType != ClassificationTypeNames.StaticSymbol)
{
// 4. Token type - looked up in SemanticTokensLegend.tokenTypes (language server defined mapping
// from integer to LSP token types).
tokenTypeIndex = GetTokenTypeIndex(classificationType, tokenTypesToIndex);
}
else
{
// 5. Token modifiers - each set bit will be looked up in SemanticTokensLegend.tokenModifiers
modifierBits = TokenModifiers.Static;
}
// Break out of the loop if we have no more classified spans left, or if the next classified span has
// a different text span than our current text span.
if (currentClassifiedSpanIndex + 1 >= classifiedSpans.Length || classifiedSpans[currentClassifiedSpanIndex + 1].TextSpan != originalTextSpan)
{
break;
}
currentClassifiedSpanIndex++;
}
deltaLineOut = deltaLine;
startCharacterDeltaOut = deltaStartCharacter;
tokenLengthOut = tokenLength;
tokenTypeOut = tokenTypeIndex;
tokenModifiersOut = (int)modifierBits;
return(currentClassifiedSpanIndex);
}