C# AbstractSuppressionCodeFixProvider.IsEndOfLine方法代码示例

            private static SyntaxToken GetNewStartToken(SyntaxToken startToken, Diagnostic diagnostic, AbstractSuppressionCodeFixProvider fixer)
            {
                var trivia = startToken.LeadingTrivia.ToImmutableArray();

                // Insert the #pragma disable directive after all leading new line trivia but before first trivia of any other kind.
                int index;
                SyntaxTrivia firstNonEOLTrivia = trivia.FirstOrDefault(t => !fixer.IsEndOfLine(t));
                if (firstNonEOLTrivia == default(SyntaxTrivia))
                {
                    index = trivia.Length;
                }
                else
                {
                    index = trivia.IndexOf(firstNonEOLTrivia);
                }

                bool needsLeadingEOL;
                if (index > 0)
                {
                    needsLeadingEOL = !fixer.IsEndOfLine(trivia[index - 1]);
                }
                else if (startToken.FullSpan.Start == 0)
                {
                    needsLeadingEOL = false;
                }
                else
                {
                    needsLeadingEOL = true;
                }

                var pragmaWarningTrivia = fixer.CreatePragmaDisableDirectiveTrivia(diagnostic, needsLeadingEOL);

                return startToken.WithLeadingTrivia(trivia.InsertRange(index, pragmaWarningTrivia));
            }

            private static int GetPositionForPragmaInsertion(ImmutableArray<SyntaxTrivia> triviaList, TextSpan currentDiagnosticSpan, AbstractSuppressionCodeFixProvider fixer, bool isStartToken, out SyntaxTrivia triviaAtIndex)
            {
                // Start token: Insert the #pragma disable directive just **before** the first end of line trivia prior to diagnostic location.
                // End token: Insert the #pragma disable directive just **after** the first end of line trivia after diagnostic location.

                Func<int, int> getNextIndex = cur => isStartToken ? cur - 1 : cur + 1;
                Func<SyntaxTrivia, bool> shouldConsiderTrivia = trivia =>
                    isStartToken ?
                    trivia.FullSpan.End <= currentDiagnosticSpan.Start :
                    trivia.FullSpan.Start >= currentDiagnosticSpan.End;

                var walkedPastDiagnosticSpan = false;
                var seenEndOfLineTrivia = false;
                var index = isStartToken ? triviaList.Length - 1 : 0;
                while (index >= 0 && index < triviaList.Length)
                {
                    var trivia = triviaList[index];

                    walkedPastDiagnosticSpan = walkedPastDiagnosticSpan || shouldConsiderTrivia(trivia);
                    seenEndOfLineTrivia = seenEndOfLineTrivia ||
                        (fixer.IsEndOfLine(trivia) || 
                         (trivia.HasStructure &&
                          trivia.GetStructure().DescendantTrivia().Any(t => fixer.IsEndOfLine(t))));

                    if (walkedPastDiagnosticSpan && seenEndOfLineTrivia)
                    {
                        break;
                    }

                    index = getNextIndex(index);
                }

                triviaAtIndex = index >= 0 && index < triviaList.Length ?
                    triviaList[index] :
                    default(SyntaxTrivia);

                return index;
            }

 private static bool IsEndOfLineOrContainsEndOfLine(SyntaxTrivia trivia, AbstractSuppressionCodeFixProvider fixer)
 {
     return fixer.IsEndOfLine(trivia) ||
         (trivia.HasStructure && trivia.GetStructure().DescendantTrivia().Any(t => fixer.IsEndOfLine(t)));
 }

 private static bool IsEndOfLineOrHasTrailingEndOfLine(SyntaxTrivia trivia, AbstractSuppressionCodeFixProvider fixer)
 {
     return fixer.IsEndOfLine(trivia) ||
         (trivia.HasStructure && fixer.IsEndOfLine(trivia.GetStructure().DescendantTrivia().LastOrDefault()));
 }

            private static SyntaxToken GetNewEndToken(SyntaxToken endToken, Diagnostic diagnostic, AbstractSuppressionCodeFixProvider fixer)
            {
                ImmutableArray<SyntaxTrivia> trivia;
                var isEOF = fixer.IsEndOfFileToken(endToken);
                if (isEOF)
                {
                    trivia = endToken.LeadingTrivia.ToImmutableArray();
                }
                else
                {
                    trivia = endToken.TrailingTrivia.ToImmutableArray();
                }

                SyntaxTrivia lastNonEOLTrivia = trivia.LastOrDefault(t => !fixer.IsEndOfLine(t));

                // Insert the #pragma restore directive after the last trailing trivia that is not a new line trivia.
                int index;
                if (lastNonEOLTrivia == default(SyntaxTrivia))
                {
                    index = 0;
                }
                else
                {
                    index = trivia.IndexOf(lastNonEOLTrivia) + 1;
                }

                bool needsTrailingEOL;
                if (index < trivia.Length)
                {
                    needsTrailingEOL = !fixer.IsEndOfLine(trivia[index]);
                }
                else if (isEOF)
                {
                    needsTrailingEOL = false;
                }
                else
                {
                    needsTrailingEOL = true;
                }

                var pragmaRestoreTrivia = fixer.CreatePragmaRestoreDirectiveTrivia(diagnostic, needsTrailingEOL);

                if (isEOF)
                {
                    return endToken.WithLeadingTrivia(trivia.InsertRange(index, pragmaRestoreTrivia));
                }
                else
                {
                    return endToken.WithTrailingTrivia(trivia.InsertRange(index, pragmaRestoreTrivia));
                }
            }

            internal static SyntaxToken GetNewEndTokenWithAddedPragma(SyntaxToken endToken, TextSpan currentDiagnosticSpan, Diagnostic diagnostic, AbstractSuppressionCodeFixProvider fixer, Func<SyntaxNode, SyntaxNode> formatNode, bool isRemoveSuppression = false)
            {
                ImmutableArray<SyntaxTrivia> trivia;
                var isEOF = fixer.IsEndOfFileToken(endToken);
                if (isEOF)
                {
                    trivia = endToken.LeadingTrivia.ToImmutableArray();
                }
                else
                {
                    trivia = endToken.TrailingTrivia.ToImmutableArray();
                }

                SyntaxTrivia insertBeforeTrivia;
                var index = GetPositionForPragmaInsertion(trivia, currentDiagnosticSpan, fixer, isStartToken: false, triviaAtIndex: out insertBeforeTrivia);

                bool needsTrailingEOL;
                if (index < trivia.Length)
                {
                    needsTrailingEOL = !fixer.IsEndOfLine(insertBeforeTrivia);
                }
                else if (isEOF)
                {
                    needsTrailingEOL = false;
                }
                else
                {
                    needsTrailingEOL = true;
                }

                var pragmaTrivia = !isRemoveSuppression ?
                    fixer.CreatePragmaRestoreDirectiveTrivia(diagnostic, formatNode, needsLeadingEndOfLine: true, needsTrailingEndOfLine: needsTrailingEOL) :
                    fixer.CreatePragmaDisableDirectiveTrivia(diagnostic, formatNode, needsLeadingEndOfLine: true, needsTrailingEndOfLine: needsTrailingEOL);

                if (isEOF)
                {
                    return endToken.WithLeadingTrivia(trivia.InsertRange(index, pragmaTrivia));
                }
                else
                {
                    return endToken.WithTrailingTrivia(trivia.InsertRange(index, pragmaTrivia));
                };
            }

            internal static SyntaxToken GetNewStartTokenWithAddedPragma(SyntaxToken startToken, TextSpan currentDiagnosticSpan, Diagnostic diagnostic, AbstractSuppressionCodeFixProvider fixer, Func<SyntaxNode, SyntaxNode> formatNode, bool isRemoveSuppression = false)
            {
                var trivia = startToken.LeadingTrivia.ToImmutableArray();
                SyntaxTrivia insertAfterTrivia;
                var index = GetPositionForPragmaInsertion(trivia, currentDiagnosticSpan, fixer, isStartToken: true, triviaAtIndex: out insertAfterTrivia);
                index++;
                
                bool needsLeadingEOL;
                if (index > 0)
                {
                    needsLeadingEOL = !fixer.IsEndOfLine(insertAfterTrivia);
                }
                else if (startToken.FullSpan.Start == 0)
                {
                    needsLeadingEOL = false;
                }
                else
                {
                    needsLeadingEOL = true;
                }

                var pragmaTrivia = !isRemoveSuppression ?
                    fixer.CreatePragmaDisableDirectiveTrivia(diagnostic, formatNode, needsLeadingEOL, needsTrailingEndOfLine: true) :
                    fixer.CreatePragmaRestoreDirectiveTrivia(diagnostic, formatNode, needsLeadingEOL, needsTrailingEndOfLine: true);

                return startToken.WithLeadingTrivia(trivia.InsertRange(index, pragmaTrivia));
            }